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Residential Whole Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | $ 35,457 | $ 39,447 | $ 63,244 | $ 86,833 | $ 39,447
Current provision | 1,830 | (3,467) | (8,583) | (22,372) |
Write-offs | (360) | (523) | (400) | (1,217) | (884)
Ending balance | 36,927 | 35,457 | 54,261 | 63,244 | 36,927
Allowance for loan loss | 36,927 | 35,457 | 54,261 | 63,244 | 36,927
Loans | 2,063,215 |  |  |  | 2,063,215
Non-QM loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 7,329 | 8,289 | 14,545 | 21,068 | 8,289
Current provision | (199) | (909) | (2,416) | (6,523) |
Write-offs | 0 | (51) | (37) | 0 |
Ending balance | 7,130 | 7,329 | 12,092 | 14,545 | 7,130
Allowance for loan loss | 7,130 | 7,329 | 12,092 | 14,545 | 7,130
Rehabilitation loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 5,202 | 6,881 | 13,668 | 18,371 | 6,881
Current provision | (23) | (1,460) | (1,809) | (3,700) |
Write-offs | (118) | (219) | (255) | (1,003) |
Ending balance | 5,061 | 5,202 | 11,604 | 13,668 | 5,061
Allowance for loan loss | 5,061 | 5,202 | 11,604 | 13,668 | 5,061
Loans | 71,900 |  | 120,400 |  | 71,900
Single-family rental loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 1,302 | 1,451 | 2,746 | 3,918 | 1,451
Current provision | 174 | (122) | (386) | (1,172) |
Write-offs | (184) | (27) | 0 | 0 |
Ending balance | 1,292 | 1,302 | 2,360 | 2,746 | 1,292
Allowance for loan loss | 1,292 | 1,302 | 2,360 | 2,746 | 1,292
Seasoned performing loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 45 | 46 | 66 | 107 | 46
Current provision | 1 | (1) | (9) | (41) |
Write-offs | 0 | 0 | 0 | 0 |
Ending balance | 46 | 45 | 57 | 66 | 46
Allowance for loan loss | 46 | 45 | 57 | 66 | 46
Purchased Credit Deteriorated Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 21,579 | 22,780 | 32,219 | 43,369 | 22,780
Current provision | 1,877 | (975) | (3,963) | (10,936) |
Write-offs | (58) | (226) | (108) | (214) |
Ending balance | 23,398 | 21,579 | 28,148 | 32,219 | 23,398
Allowance for loan loss | 23,398 | $ 21,579 | 28,148 | $ 32,219 | 23,398
Loans | 63,800 |  | 83,100 |  | 63,800
Unfunded Loan Commitment |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Ending balance | 110 |  | 512 |  | 110
Commitment to lend, unfunded | 10,100 |  | 40,300 |  | 10,100
Allowance for loan loss | $ 110 |  | $ 512 |  | $ 110

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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
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