| Repayments For Securities Sold Under Agreements To Repurchase | $2.4B | $2.5B | $2.5B | $2.7B | $2.7B | $2.5B | $2.3B | $3.1B |
| Proceeds From Borrowings Of Securities Sold Under Agreements To Repurchase | $2.4B | $2.7B | $2.4B | $2.7B | $2.7B | $2.5B | $2.3B | $3.1B |
| Proceeds From Principal Paydown Of Agency Residential Mortgage Backed Security | $19.1M | $19.2M | $25.9M | $22.2M | $23.2M | $25.2M | $29.6M | $32.2M |
| Cash Provided by (Used in) Investing Activity, Including Discontinued Operation | -$15.2M | -$96.9M | — | $19.5M | -$19M | -$24.8M | -$42.3M | $28.5M |
| Cash Provided by (Used in) Financing Activity, Including Discontinued Operation | $17M | $88.7M | — | -$41.6M | $25.3M | $23.9M | $31.7M | -$23.5M |
| Net Change in Cash and Restricted Cash | — | — | 143200000.0% | -2146300000.0% | — | — | -829000000.0% | 1762500000.0% |
| Interest Income Operating | $13.7M | $14.3M | $15.1M | $14.8M | $14.8M | $15.6M | $15.8M | $15.9M |
| Payments to Acquire Mortgage-Backed Securities (MBS), Available-for-Sale | $88.3M | $183.7M | $76.7M | $50.5M | $103.9M | $34.8M | $58.5M | $15M |
| Interest Paid, Net | $8.5M | $8.6M | $9M | $8.1M | $9.9M | $10.3M | $31.4M | $14.1M |
| Interest Paid, Excluding Capitalized Interest, Operating Activity | $8.5M | $8.6M | $9M | $8.1M | $9.9M | $10.3M | $31.4M | $14.1M |
| Cash Provided by (Used in) Operating Activity, Including Discontinued Operation | — | — | — | $682K | $12.5M | — | $8.4M | $12.6M |
| Unrealized Gain Loss On RMBS Measured At Fair Value | -$4.4M | $25M | -$31.7M | $14.8M | $3.5M | $10.7M | $6.6M | -$12.4M |
| Payments for (Proceeds from) Derivative Instrument, Investing Activities | $0 | $0 | $16.6M | $1.8M | — | — | — | -$11.3M |
| Servicing Fee Income | $12.3M | $11.7M | $11.6M | $11M | $10.9M | $10.8M | $10.6M | $10.2M |
| Net Servicing Income | $8.9M | $8.5M | $8.5M | $8.4M | $9M | $8.5M | $8.1M | $7.9M |
| Total other income | -$2.5M | -$15.7M | — | -$13.6M | -$5.6M | -$3.2M | $0 | -$7.7M |
| Payments of Dividends | $6.8M | $7.1M | $7.3M | $7.2M | $7.4M | $7.9M | $6.2M | $6.1M |
| Cash Dividends Paid | $6.8M | $7.1M | $7.3M | $7.2M | $7.4M | $7.9M | $6.2M | $6.1M |
| Payments of Ordinary Dividends, Common Stock | $261K | $304K | $0 | $7.1M | $506K | — | — | $5.9M |
| Cash Dividends, Common Stock | $261K | $304K | $0 | $7.1M | $506K | — | — | $5.9M |
| Interest Income (Expense), Operating | $167K | $109K | $660K | $2.2M | $2.6M | $3.3M | $3.2M | $4.5M |
| Comprehensive Income Loss Net Of Tax Attributable To Parent Less Preferred Stock Dividends | -$5.5M | $1.3M | -$1.5M | -$2.6M | -$616K | $4.5M | $6.5M | -$4.4M |
| Dividends, Common Stock, Cash | $4.5M | $4.8M | $4.8M | $4.9M | $5.4M | $3.7M | $3.7M | $3.7M |
| Increase in accrued expenses and other liabilities | — | -$715K | — | -$7.8M | — | -$11.4M | — | $2.6M |
| Increase (Decrease) in Accounts Receivable and Other Operating Assets | -$952K | -$2.6M | — | -$2.5M | $1.7M | -$2.2M | $3.3M | -$2.6M |
| Other Comprehensive Income (Loss), Net of Tax | -$3.7M | $16.4M | -$10.8M | $6.8M | $320K | $2.6M | $1.2M | -$2.4M |
| OCI Unrealized Holding Gain (Loss) on Securities, Net of Tax | -$3.7M | $16.4M | -$10.8M | $6.9M | $320K | $2.6M | $1.2M | -$2.4M |
| Unrealized Gain (Loss) on Securities | -$3.7M | $16.4M | -$10.8M | $6.9M | $320K | $2.6M | $1.2M | -$2.4M |
| OCI Attributable to Parent | -$3.7M | $16.4M | -$10.8M | $6.8M | $320K | $2.6M | $1.2M | -$2.4M |
| Other comprehensive income (loss), after-tax | -$3.7M | $16.4M | -$10.8M | $6.9M | $320K | $2.6M | $1.2M | -$2.4M |
| OCI Unrealized Holding Gain (Loss) on Securities, Net of Tax | -$3.7M | $16.4M | -$10.8M | $6.9M | $320K | $2.6M | $1.2M | -$2.4M |
| Other comprehensive income (loss) | -$3.7M | $16.4M | -$10.8M | $6.9M | $320K | $2.6M | $1.2M | -$2.4M |
| Other comprehensive income/(loss) | -$3.7M | $16.4M | -$10.8M | $6.8M | $320K | $2.6M | $1.2M | -$2.4M |
| Net unrealized gains (losses) on securities still held | -$3.7M | $16.4M | -$10.8M | $6.9M | $320K | $2.6M | $1.2M | -$2.4M |
| Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent | -$3.7M | $16.4M | -$10.8M | $6.8M | $320K | $2.6M | $1.2M | -$2.4M |
| OCI Net of Tax, Parent | -$3.7M | $16.4M | -$10.8M | $6.8M | $320K | $2.6M | $1.2M | -$2.4M |
| OCI Attributable to Parent | -$3.7M | $16.4M | -$10.8M | $6.8M | $320K | $2.6M | $1.2M | -$2.4M |
| Preferred Stock Dividends and Other Adjustments | $2.6M | $2.6M | $2.5M | $2.5M | $2.5M | $2.5M | $2.4M | $2.4M |
| Comprehensive Income Including Noncontrolling Interest | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income Attributable to Parent | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income Including Noncontrolling Interest | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive income (loss), including noncontrolling interest | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income (Loss), Total | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income, Including Noncontrolling Interest | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income Including Noncontrolling Interest | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Total Comprehensive Income | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Comprehensive Income | -$3M | $4M | $1M | -$142K | $1.9M | $7.1M | $9M | -$2M |
| Repayments Of Bank Debt | $7M | $8.7M | $0 | $2M | $0 | $2.1M | $1.8M | $2M |
| Reclassifications Net of Tax | -$1.9M | -$14.8M | $9M | -$9.3M | -$935K | $2M | — | -$2M |
| Unrealized Gain Loss On Investments In Servicing Related Assets | -$3.3M | -$7.5M | — | -$6.3M | -$2.7M | -$5.9M | -$3.9M | -$1.4M |
| Federal | $499K | $339K | $2.2M | $153K | $990K | $252K | $545K | $830K |
| Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount | -$299K | -$2.8M | — | -$1.6M | -$454K | $745K | — | -$566K |
| Stock options excluded as their inclusion would be anti-dilutive (in shares) | $0 | $237.6K | — | $237.6K | $30.8K | — | — | $292.8K |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | $304K | -$2.6M | $3M | -$1.4M | $564K | $1M | $1.8M | $287K |
| Proceeds from Issuance of Common Stock | $68K | $5.3M | $155K | $3.6M | $8.9M | $2.1M | $154K | $165K |
| Issuance of common stock in connection with the Spin-Off and reclassification of net parent investment | $68K | $5.3M | $155K | $3.6M | $8.9M | $2.1M | $154K | $165K |
| State | $69K | $42K | $286K | $20K | $131K | $32K | $74K | $109K |
| Amortization Of Financing Costs | $78K | $78K | $77K | $78K | $78K | $78K | $95K | $104K |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | $61K | $27K | $221K | $16K | $103K | $27K | $51K | $86K |
| Gain (loss) on sale of derivatives | $9.4M | -$8M | $13.6M | $4.6M | $14.8M | -$10.5M | — | -$70K |
| Dividend, Share-Based Payment Arrangement | $91K | $90K | $91K | $90K | $90K | $83K | $53K | $53K |
| Long Term Incentive Plan Distributions Paid | $91K | $90K | $91K | $90K | $90K | $83K | $53K | $53K |
| Noncontrolling Interest Increase From Long Term Incentive Plan Units | $124K | $124K | $124K | $84K | $60K | $72K | $71K | $31K |
| Stock-based compensation | $124K | $124K | $124K | $84K | $60K | $72K | $71K | $31K |
| OCI Attributable to Noncontrolling Interest | -$57K | $79K | $19K | -$3K | $35K | $119K | $142K | -$29K |
| Less: comprehensive income attributable to noncontrolling interest | -$57K | $79K | $19K | -$3K | $35K | $119K | $142K | -$29K |
| Comprehensive Income Attributable to Noncontrolling Interests | -$57K | $79K | $19K | -$3K | $35K | $119K | $142K | -$29K |
| Comprehensive Income, Noncontrolling Interest | -$57K | $79K | $19K | -$3K | $35K | $119K | $142K | -$29K |
| Number Of Units And Shares Remaining Available For Future Issuance Under Equity Compensation Plans In Shares | 181.9K | 0 | 356.8K | 0 | 146.5K | 0 | 0 | 24.4K |
| Payments To Acquire Mortgage Servicing Rights | — | -$13K | — | $0 | $0 | -$2K | $0 | -$15K |
| Net Income Loss Attributable To Noncontrolling Interest | $19K | -$246K | $232K | -$133K | $34K | $83K | $130K | $6K |
| Income Taxes Paid, Net | $28K | $24K | $12K | $2K | $34K | $2K | $11K | $2K |
| Income Taxes Paid, Net | $28K | $24K | $12K | $2K | $34K | $2K | $11K | $2K |
| Number of reportable segments | 0.50 | 0.50 | 0.50 | 2.00 | — | — | — | 2.00 |
| Number of reportable segments | $0.5 | $0.5 | $0.5 | $2 | — | — | — | $2 |
| Percentage Of Taxable Income That Must Be Distributed To Qualify As AREIT | — | — | 90.0% | 90.0% | — | — | 90.0% | 90.0% |
| Effective tax rates | $0.5 | -$0 | — | -$0 | $0.4 | $0.1 | — | $0.7 |
| Income taxes at U.S. statutory rate of 21% | $0.2 | $0.2 | — | $0.2 | $0.2 | $0.2 | — | $0.2 |
| Common Stock Dividends Per Share Declared | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Common Stock Dividends Per Share | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Dividends per share declared | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Dividends per share declared | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Common Stock Dividends Per Share Declared | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Dividends declared (in dollars per share) | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Common Stock Dividends Per Share Declared | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| Common Stock Dividends Per Share Declared | $0.2 | $0.2 | $0.2 | $0.2 | $0.2 | $0.1 | $0.1 | $0.1 |
| State income taxes – net of federal income tax benefit | $0 | -$0 | — | -$0 | $0 | $0 | — | $0.1 |
| Other | $0 | $0 | $0 | $0 | $0 | $0 | $0 | — |
| Securities gains, net – non-qualifying hedges on MSRs | -$1.9M | -$3.7M | -$1.1M | -$4M | -$2.1M | $0 | $0 | $0 |
| Gain On RMBS Measured At Fair Value | $14.8K | $14.8K | $14.8K | $0 | $0 | $0 | $0 | — |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | $250 | $250 | $250 | $250 | $250 | $250 | $250 | — |
| Loss On RMBS Measured At Fair Value Through Earnings | $1.9M | $152K | $24K | $918K | $2.1M | $0 | $0 | $0 |
| Loss On Sales Of Real Estate Mortgage Backed Securities | $0 | $3.5M | $1.2M | $3.1M | $0 | $0 | $0 | $0 |
| Number Of Overnight And Demand Securities | 0.00 | 0.00 | 0.00 | 0.00 | — | — | — | 0.00 |
| Payments For Bank Loans | $0 | $0 | $0 | $128.5K | $128.5K | $128.5K | $128.5K | — |
| Payments For Proceeds From Derivative Instrument Financing Activities | -$3.5M | — | -$22M | $8.5M | -$1.5M | $3M | -$10M | $0 |
| Proceeds from Sale of Mortgage-Backed Securities (MBS), Available-for-Sale | $39.2M | $84.6M | $71.3M | $49.6M | $50.3M | — | — | $0 |
| Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Settled | — | — | — | — | 0 | — | — | — |
| Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted | $0 | $0 | -$25K | $0 | $0 | $0 | $0 | $0 |
