| Average notional amount | $9.5B | $13.4B | $13B | $20.4B | $18.8B | $24.3B | $18B | $13.7B |
| Principal Payments On Assets Sold Under Agreements To Repurchase | $11.7B | $11.7B | $11.7B | $11B | — | — | — | $7.6B |
| Proceeds from repurchase agreements | $11.6B | $11.6B | $11.6B | $13B | — | — | — | $7.6B |
| Payments to acquire available-for-sale debt securities | $581.7M | $489.2M | $621.3M | $2.6B | $3.7B | $2.4B | $589.8M | $1.4B |
| Payments to Acquire Debt Securities, Available-for-Sale | $581.7M | $489.2M | $621.3M | $2.6B | $3.7B | $2.4B | $589.8M | $1.4B |
| Debt Securities, Available-for-sale, Gross Realized Gains (Losses), Amortized Cost Sold | $494.3M | $91.5M | $1.3B | $1.4B | $3.8B | $4.3B | $310.9M | $1.1B |
| Sale of investments | $472.3M | $91.1M | $1.3B | $1.3B | $3.8B | $4.2B | $295.1M | $1.1B |
| Payments For Securities Purchased Under Agreements To Resell | $788.3M | $1.1B | $711.9M | $1.4B | $356.7M | $842.2M | $480.8M | $545.5M |
| Proceeds From Securities Purchased Under Agreements To Resell | $790.5M | $1.1B | $715.1M | $1.6B | $356M | $912.7M | $481.8M | $531.8M |
| Cash Provided by (Used in) Financing Activity, Including Discontinued Operation | -$369.2M | -$7.3M | -$997M | $1.8B | — | -$1.8B | — | -$320.2M |
| Net Change in Cash and Restricted Cash | $48.4M | -$175.1M | $205.9M | -$119.9M | $100.6M | $88.6M | $175M | -$301.8M |
| Repayments Of Convertible Debt | $2.4M | $2.4M | $2.4M | $0 | $0 | $0 | $0 | $261.9M |
| Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale | $192.2M | $188.3M | $190M | $180.7M | $247.2M | $174.6M | $160.9M | $173.9M |
| Interest Paid, Net | $142M | $149.3M | $112M | $125.6M | $113.2M | $182.1M | $66.9M | $131.2M |
| Interest Paid, Excluding Capitalized Interest, Operating Activity | $142M | $149.3M | $112M | $125.6M | $113.2M | $182.1M | $66.9M | $131.2M |
| Contractually specified servicing fees, late charges and ancillary fees | $176M | $171.7M | $167.6M | $156.9M | $158.4M | $166.4M | $145.1M | $130.1M |
| Net Servicing Income | $171.5M | $167.8M | $163M | $153.7M | $156M | $162.7M | $141.7M | $128.3M |
| Payment For Purchase And Origination, Loan, Mortgage, Held-for-Sale | $50K | $22.4M | $42M | $28.9M | $48.7M | $49.8M | $93.8M | $92.3M |
| Interest and Dividend Income, Operating | $116M | $112.6M | $103.8M | $111.4M | $117.1M | $93.6M | $89.9M | $88.7M |
| Residential mortgage loan sales | $0 | $19.6M | $43.3M | $23.1M | $46.2M | $47.9M | $94.1M | $88.4M |
| Interest Income, Available-for-sale | $99.2M | $101.1M | $92.6M | $100.4M | $108.8M | $83.8M | $82M | $80.7M |
| Proceeds from revolver | $0 | $7.7M | $42M | $29M | $49M | $43.1M | $53.7M | $57.5M |
| Cash Provided by (Used in) Operating Activity, Including Discontinued Operation | $143.7M | $87.1M | — | $111.9M | $99.1M | -$239.2M | $117.1M | $56.6M |
| AOCI before reclass, net of taxes | -$53.5M | $267.9M | -$255.4M | $110.2M | $33.1M | $53.8M | $37M | -$56.6M |
| Other Comprehensive Income (Loss) Before Reclassifications, Net of Tax | -$53.5M | $267.9M | -$255.4M | $110.2M | $33.1M | $53.8M | $37M | -$56.6M |
| Other Comprehensive Loss Before Reclassifications, Net | -$53.5M | $267.9M | -$255.4M | $110.2M | $33.1M | $53.8M | $37M | -$56.6M |
| Repayments of Lines of Credit | $0 | $4.7M | $43M | $23.1M | $47.7M | $44M | $52.8M | $54.2M |
| Payments for (Proceeds from) Derivative Instrument, Investing Activities | — | — | -$218M | $146.5M | $111M | $27.5M | $0 | -$50.9M |
| OCI - Available-for-sale securities, net of tax | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| OCI Net Unrealized Gain (Loss) on Securities | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| OCI Available for Sale Securities Adjustment | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| Unrealized Gains on Available-for-Sale Securities | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| Other comprehensive income (loss), after-tax | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| OCI - Available-for-Sale Securities, Net of Tax | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| Unrealized gains (losses) on available-for-sale securities | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| Other comprehensive income (loss) | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| OCI Available for Sale Securities Adjustment, Net of Tax | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| OCI Unrealized Gain (Loss) on Securities, Pre-tax | -$44.1M | $269.6M | -$266.6M | $157.2M | $50.5M | $61M | $51.8M | -$44.2M |
| Servicing Asset At Fair Value, Total Changes In Fair Value | — | — | — | -$36.2M | — | — | — | -$44M |
| Servicing Asset At Fair Value, Unrealized Changes In Fair Value | — | — | — | -$36.2M | — | — | — | -$42.5M |
| Cash Provided by (Used in) Investing Activity, Including Discontinued Operation | $274M | -$254.9M | $1.2B | -$2B | — | $2.1B | — | -$38.1M |
| Increase Decrease In Interest Payable Net | — | -$8.8M | — | -$10.6M | — | -$34.9M | — | -$37.4M |
| Dividends, Common Stock | $46.9M | $46.9M | $46.9M | $47.3M | $41M | $35.7M | $35.9M | $36.1M |
| Dividends, Common Stock, Cash | $46.9M | $46.9M | $46.9M | $47.3M | $41M | $35.7M | $35.9M | $36.1M |
| Payments of Ordinary Dividends, Common Stock | $46.9M | $46.9M | $46.9M | $47M | $47.2M | $41M | $35.7M | $35.9M |
| Cash Dividends, Common Stock | $46.9M | $46.9M | $46.9M | $47M | $47.2M | $41M | $35.7M | $35.9M |
| Increase (Decrease) in Other Operating Assets and Liabilities, Net | $5.1M | -$17.4M | $59.8M | -$29.3M | -$27.1M | -$14.7M | — | -$28.2M |
| Realized And Unrealized Losses (Gains) On Derivative Instruments | $36.9M | $36.9M | $36.9M | -$107.4M | — | — | — | $26.9M |
| UWM Termination Fee paid by CCM | — | — | — | $0 | — | — | — | $25.4M |
| Comprehensive Income (Loss) Attributable to Common Stockholders | $479K | $19.4M | $0 | $64.9M | -$221.8M | -$80.2M | — | -$24.7M |
| Increase (Decrease) In Due To Counterparties, Net | — | — | $174.3M | -$893.1M | — | -$217.7M | -$48.7M | -$21.2M |
| Float income | — | — | — | $25.6M | — | — | — | $20.4M |
| Net Income (Loss) Available To Common Stockholders | $44.6M | -$250.3M | $264.9M | -$92.2M | -$272.3M | -$141.2M | -$1.3M | $19.5M |
| Revolving credit facilities | $29.9M | $26.9M | $21.6M | $20.1M | $20.3M | $19.1M | $16.1M | $16.4M |
| Debt Securities, Available-for-Sale, Realized Loss | $22.6M | $388K | $8.6M | $38.8M | $40.3M | $28.3M | $16.3M | $15.5M |
| Payments of Ordinary Dividends, Preferred Stock and Preference Stock | $11.8M | $11.8M | $11.8M | $11.8M | $13.2M | $13.2M | $13.3M | $13M |
| OCI Reclassification Adjustment for Sale of Securities | -$9.4M | -$1.8M | — | -$47M | -$17.4M | -$7.3M | -$14.7M | -$12.4M |
| OCI Reclassification Adjustment, Sale of Securities, Net of Tax | -$9.4M | -$1.8M | — | -$47M | -$17.4M | -$7.3M | -$14.7M | -$12.4M |
| Reclassification from AOCI | -$9.4M | -$1.8M | — | -$47M | -$17.4M | -$7.3M | -$14.7M | -$12.4M |
| Reclassified net gains (losses) from AOCI into earnings | -$9.4M | -$1.8M | — | -$47M | -$17.4M | -$7.3M | -$14.7M | -$12.4M |
| OCI Reclassifications to Net Income | -$9.4M | -$1.8M | — | -$47M | -$17.4M | -$7.3M | -$14.7M | -$12.4M |
| Comprehensive Income Including Noncontrolling Interest | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income Attributable to Parent | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income Including Noncontrolling Interest | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive income (loss), including noncontrolling interest | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income (Loss), Total | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income, Including Noncontrolling Interest | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income Including Noncontrolling Interest | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Total Comprehensive Income | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Comprehensive Income | $12.3M | $31.1M | $10.2M | $78.1M | -$208.6M | -$66.9M | — | -$11.9M |
| Marketable security, gain (loss) | -$22.4M | $1.4M | -$8M | -$32.7M | -$32.8M | -$16.2M | -$14.4M | -$11M |
| Total net securities (losses) | -$22M | -$388K | -$6.8M | -$33.5M | -$33.2M | -$15.9M | -$15.8M | -$10.9M |
| Deposits at banks | $16.7M | $11.6M | $11.1M | $10.9M | $8.1M | $9.7M | $7.8M | $7.8M |
| Interest Income (Expense), Operating | -$38.3M | -$42.3M | -$34.9M | -$20.3M | -$19.6M | -$23.5M | -$15.5M | -$6.5M |
| Stock-based compensation | $1.6M | $1.6M | $1.6M | $6.5M | $1.9M | $1.5M | $3.4M | $4.4M |
| Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture | $1.6M | $1.6M | $1.6M | $6.5M | $1.9M | $1.5M | $3.4M | $4.4M |
| Pre-tax stock-based compensation cost | $1.6M | $1.6M | $1.6M | $6.5M | $1.9M | $1.5M | $3.4M | $4.4M |
| Senior notes | $0 | $0 | $0 | $0 | $1.5M | $2.9M | $2.9M | $2.8M |
| Repayments of Long-term Lines of Credit | $78.4M | $280.1M | $50M | $157M | $64.3M | $66.5M | $186M | $2.5M |
| Gain Loss On Sale Of Mortgage Loans | $0 | $928K | $569K | $624K | $954K | $1.8M | $1.8M | $2.2M |
| Net gains/(losses) on sales of loans | $0 | $927K | $558K | $669K | $883K | $1.6M | $1.6M | $2.1M |
| Servicing costs | $4.5M | $3.9M | $4.6M | $3.2M | $2.4M | $3.8M | $3.4M | $1.8M |
| Servicing rights obtained in acquisition | -$448K | $87K | -$923K | $0 | — | — | — | $1.5M |
| Other income, net (Note 6) | $226K | $123K | $850K | $761K | $1M | $4.1M | — | $1.3M |
| Payments to Acquire Mortgage Servicing Rights (MSR) | $3.4M | $43.2M | $27.5M | $1.5M | $91.4M | $8.6M | $2.4M | $985K |
| Additions from purchases of mortgage servicing rights | $28.5M | $28.5M | $28.5M | $1.5M | — | — | — | $931K |
| Income Taxes Paid, Net | $3.5M | $41K | $5.6M | $3.7M | $5.6M | $3.8M | $11.4M | -$777K |
| Income Taxes Paid, Net | $3.5M | $41K | $5.6M | $3.7M | $5.6M | $3.8M | $11.4M | -$777K |
| Convertible senior notes | $4.6M | $4.5M | $4.5M | $4.5M | $4.4M | $4.5M | $4.5M | $710K |
| Increase Decrease In Accrued Interest Receivable Net | $506K | $568K | -$3.2M | $5.9M | — | -$8.4M | — | $688K |
| Servicing Asset At Fair Value Additions | $0 | $166K | $501K | $230K | $408K | $427K | $874K | $669K |
| Add - Incremental shares under stock-based compensation plans (in shares) | $355.1K | $0 | $477.5K | $0 | $0 | $0 | $0 | $446.5K |
| Earnings allocated to participating share awards | $330K | $303K | $753K | $404K | $344K | $294K | $267K | $434K |
| Amortization Of Financing Costs And Discounts | $616K | $403K | $414K | $362K | $442K | $615K | $629K | $218K |
| Unrealized (losses) gains on mortgage loans | $0 | $50K | — | $117K | $73K | $107K | — | -$149K |
| Proceeds from Issuance of Common Stock | $50K | $61K | $79K | $82K | $68K | $60K | $69K | $41K |
| Stock Issued During Period, Value, Dividend Reinvestment Plan | $100K | $100K | — | $83K | $100K | $100K | $100K | $41K |
| Issuance of common stock in connection with the Spin-Off and reclassification of net parent investment | $50K | $61K | $79K | $82K | $68K | $60K | $69K | $41K |
| Debt Securities, Available-for-sale, Total Credit Loss Expense (Reversal) | $171K | -$276K | $284K | $94K | -$116K | -$91K | -$8K | $15K |
| Payoffs and paydowns of loans held-for-sale | $51K | $42K | $2K | $1K | $1.4M | $3K | $3K | $5K |
| Dividend reinvestment plan issuances (in shares) | 4K | 4.4K | 19K | 6.5K | 5.7K | 6.1K | 25.2K | 3.3K |
| Number of Operating Segments | 0.25 | 0.25 | 0.25 | 1.00 | — | — | — | 1.00 |
| Number of reportable segments | 0.25 | 0.25 | 0.25 | 1.00 | — | — | — | 1.00 |
| Number of operating segments | $0.3 | $0.3 | $0.3 | $1 | — | — | — | $1 |
| Number of reportable segments | $0.3 | $0.3 | $0.3 | $1 | — | — | — | $1 |
| Common Stock Dividends Per Share Declared | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Common Stock Dividends Per Share | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Dividends per share declared | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Dividends per share declared | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Common Stock Dividends Per Share Declared | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Dividends declared (in dollars per share) | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Common Stock Dividends Per Share Declared | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Common Stock Dividends Per Share Declared | $0.5 | $0.5 | $0.4 | $0.5 | $0.4 | $0.3 | $0.3 | $0.3 |
| Floating Annual Rate | — | — | 26.2% | 26.2% | — | — | 26.2% | 26.2% |
| Percent of share based award available for grant in succeeding calendar year | — | — | 9.8% | 9.8% | — | — | 9.8% | 9.8% |
| Share-Based Payment Tax Withholding Decrease | — | — | — | $437.5K | $437.5K | $437.5K | $437.5K | — |
| Tax Withholding for Share-Based Payments | $0 | $0 | $0 | $437.5K | $437.5K | $437.5K | $437.5K | — |
| Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation | — | — | — | $437.5K | $437.5K | $437.5K | $437.5K | — |
| Current Federal, State and Local, Tax Expense (Benefit) | $3.2M | $3.2M | $3.2M | $4.3M | $4.3M | $4.3M | $4.3M | — |
| Federal | $2.4M | $2.4M | $2.4M | $4.4M | $4.4M | $4.4M | $4.4M | — |
| Federal | $6.7M | $6.7M | $6.7M | -$1.3M | -$1.3M | -$1.3M | -$1.3M | — |
| Deferred taxes | $8.4M | $8.4M | $8.4M | -$2.1M | -$2.1M | -$2.1M | -$2.1M | — |
| State | $1.7M | $1.7M | $1.7M | -$768.5K | -$768.5K | -$768.5K | -$768.5K | — |
| Effective tax rates | $0 | $0 | $0 | -$0 | -$0 | -$0 | -$0 | — |
| Other | — | — | — | -$0 | -$0 | -$0 | -$0 | — |
| Nondeductible compensation expenses | — | — | — | $1.4M | $1.4M | $1.4M | $1.4M | — |
| Nondeductible compensation expenses, effective tax rate | — | — | — | — | — | — | -1.2% | — |
| State income taxes – net of federal income tax benefit | $0 | $0 | $0 | $0 | $0 | $0 | $0 | — |
| Federal taxes | — | — | — | $5.9M | $5.9M | $5.9M | $5.9M | — |
| State taxes | — | — | — | $300K | $300K | $300K | $300K | — |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | $18.1M | $18.1M | $18.1M | -$23.4M | -$23.4M | -$23.4M | -$23.4M | — |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | — | — | — | $225K | $225K | $225K | $225K | — |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | $5.4M | $5.4M | $5.4M | -$354.3K | -$354.3K | -$354.3K | -$354.3K | — |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | $2M | $2M | $2M | -$685.3K | -$685.3K | -$685.3K | -$685.3K | — |
| Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount | $13.9M | $13.9M | $13.9M | -$25.1M | -$25.1M | -$25.1M | -$25.1M | — |
| Participating Securities Distributed And Undistributed Earnings Loss Diluted | $0 | $0 | $77K | $0 | $0 | $0 | $0 | $0 |
| Payment, Tax Withholding, Share-Based Payment Arrangement | $0 | $0 | $0 | $437.5K | $437.5K | $437.5K | $437.5K | — |
| Proceeds from long-term lines of credit | — | — | $71M | $70M | $143M | $0 | $160M | $0 |
| Proceeds from sales of mortgage servicing rights | $27.4M | $27.4M | $27.4M | $109.8M | $109.8M | $109.8M | $109.8M | — |
| Servicing Asset at Fair Value, Disposition From Sales | $27.5M | $27.5M | $27.5M | $109M | $109M | $109M | $109M | — |
