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Segment Information - Statements of Income (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) segment | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items] |  |  |
Number of business segments | segment | 2 |  |
Interest income | $ 1,167,872 | $ 1,331,219 | $ 948,401
Interest expense | 804,615 | 903,228 | 557,617
Net interest income | 363,257 | 427,991 | 390,784
Other revenue: |  |  |
Gain on sales, including fee-based services, net | 74,932 | 72,522 | 55,816
Mortgage servicing rights | 51,272 | 69,912 | 69,346
Servicing revenue | 194,318 | 193,542 | 152,068
Amortization of MSRs | (68,422) | (63,093) | (59,876)
Property operating income | 7,226 | 5,708 | 1,877
(Loss) gain on derivative instruments, net | (8,543) | 6,763 | 26,609
Other income (loss), net | 8,083 | 7,667 | (17,563)
Total other revenue | 258,866 | 293,021 | 228,277
Other expenses: |  |  |
Employee compensation and benefits | 154,915 | 141,267 | 137,935
Commissions | 26,779 | 18,521 | 23,890
Selling and administrative | 54,931 | 51,260 | 53,990
Property operating expenses | 7,394 | 5,897 | 2,136
Depreciation and amortization | 9,555 | 9,743 | 8,732
Provision for loss sharing (net of recoveries) | 11,782 | 15,695 | 1,862
Provision for credit losses (net of recoveries) | 68,543 | 73,446 | 21,169
Litigation settlement |  |  | 7,350
Total other expenses | 333,899 | 315,829 | 257,064
Income before extinguishment of debt, gain on real estate, income from equity affiliates and income taxes | 288,224 | 405,183 | 361,997
Loss on extinguishment of debt | (412) | (1,561) | (4,933)
Gain on real estate | 3,813 | 0 | 0
Income (loss) from equity method investments | 5,772 | 24,281 | 14,247
Provision for income taxes | (13,478) | (27,347) | (17,484)
Net income | 283,919 | 400,556 | 353,827
Preferred stock dividends | 41,369 | 41,369 | 40,954
Net income attributable to noncontrolling interest | 19,278 | 29,122 | 28,044
Net income attributable to common stockholders | $ 223,272 | 330,065 | 284,829
Reporting segments | segment | 2 |  |
Operating segments | Structured Business |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | $ 1,112,763 | 1,279,433 | 903,622
Interest expense | 781,668 | 880,602 | 538,659
Net interest income | 331,095 | 398,831 | 364,963
Other revenue: |  |  |
Gain on sales, including fee-based services, net | 0 | 0 | 0
Mortgage servicing rights | 0 | 0 | 0
Servicing revenue | 0 | 0 | 0
Amortization of MSRs | 0 | 0 | 0
Property operating income | 7,226 | 5,708 | 1,877
(Loss) gain on derivative instruments, net | 0 | 0 | 0
Other income (loss), net | 7,255 | 4,868 | (2,360)
Total other revenue | 14,481 | 10,576 | (483)
Other expenses: |  |  |
Employee compensation and benefits | 67,187 | 53,507 | 56,032
Commissions | 0 | 0 | 0
Selling and administrative | 26,922 | 23,234 | 26,059
Property operating expenses | 7,394 | 5,897 | 2,136
Depreciation and amortization | 6,296 | 5,052 | 4,041
Provision for loss sharing (net of recoveries) | 0 | 0 | 0
Provision for credit losses (net of recoveries) | 63,953 | 70,344 | 19,770
Litigation settlement |  |  | 7,350
Total other expenses | 171,752 | 158,034 | 115,388
Income before extinguishment of debt, gain on real estate, income from equity affiliates and income taxes | 173,824 | 251,373 | 249,092
Loss on extinguishment of debt | (412) | (1,561) | (4,933)
Gain on real estate | 3,813 |  |
Income (loss) from equity method investments | 5,772 | 24,281 | 14,247
Provision for income taxes | 3,590 | 803 | (821)
Net income | 186,587 | 274,896 | 257,585
Preferred stock dividends | 41,369 | 41,369 | 40,954
Net income attributable to noncontrolling interest | 0 | 0 | 0
Net income attributable to common stockholders | 145,218 | 233,527 | 216,631
Operating segments | Agency Business |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | 55,109 | 51,786 | 44,779
Interest expense | 22,947 | 22,626 | 18,958
Net interest income | 32,162 | 29,160 | 25,821
Other revenue: |  |  |
Gain on sales, including fee-based services, net | 74,932 | 72,522 | 55,816
Mortgage servicing rights | 51,272 | 69,912 | 69,346
Servicing revenue | 194,318 | 193,542 | 152,068
Amortization of MSRs | (68,422) | (63,093) | (59,876)
Property operating income | 0 | 0 | 0
(Loss) gain on derivative instruments, net | (8,543) | 6,763 | 26,609
Other income (loss), net | 828 | 2,799 | (15,203)
Total other revenue | 244,385 | 282,445 | 228,760
Other expenses: |  |  |
Employee compensation and benefits | 87,728 | 87,760 | 81,903
Commissions | 26,779 | 18,521 | 23,890
Selling and administrative | 28,009 | 28,026 | 27,931
Property operating expenses | 0 | 0 | 0
Depreciation and amortization | 3,259 | 4,691 | 4,691
Provision for loss sharing (net of recoveries) | 11,782 | 15,695 | 1,862
Provision for credit losses (net of recoveries) | 4,590 | 3,102 | 1,399
Litigation settlement |  |  | 0
Total other expenses | 162,147 | 157,795 | 141,676
Income before extinguishment of debt, gain on real estate, income from equity affiliates and income taxes | 114,400 | 153,810 | 112,905
Loss on extinguishment of debt | 0 | 0 | 0
Gain on real estate | 0 |  |
Income (loss) from equity method investments | 0 | 0 | 0
Provision for income taxes | (17,068) | (28,150) | (16,663)
Net income | 97,332 | 125,660 | 96,242
Preferred stock dividends | 0 | 0 | 0
Net income attributable to noncontrolling interest | 0 | 0 | 0
Net income attributable to common stockholders | 97,332 | 125,660 | 96,242
Other |  |  |
Other expenses: |  |  |
Net income attributable to noncontrolling interest | 19,278 | 29,122 | 28,044
Net income attributable to common stockholders | $ (19,278) | $ (29,122) | $ (28,044)

X
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit), extinguishment of debt, sale of real estate and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References No definition available. + Details
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- Definition The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-4 + Details
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- Definition All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-2 + Details
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- Definition The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(h)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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