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Fair Value of Assets & Liabilities - Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Acquired | $ 0 |  | $ 0 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Beginning balance | (18,645) | $ (26,545) | (22,795) | $ (31,540)
Net income | (599) | (4,008) | (1,311) | (3,892)
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements | 2,446 | 2,468 | 7,308 | 7,347
Net transfers into (out of) Level 3 | 0 | 0 | 0 | 0
Ending balance | (16,798) | (28,085) | (16,798) | (28,085)
Net unrealized gains (losses) included in net income | (76) | (4,008) | (788) | (3,892)
Trading securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 628 | 1,255 | 941 | 1,524
Acquired | 0 |  | 0 |
Net income | (157) | (157) | (470) | (128)
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | (298)
Net transfers into (out of) Level 3 | 0 | 0 | 0 | 0
Ending balance | 471 | 1,098 | 471 | 1,098
Net unrealized gains (losses) included in net income | 0 | 0 | 0 | (66)
Interest- only strips- AFS |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 25,446 | 17,792 | 19,136 | 9,902
Acquired | 0 |  | 0 |
Net income | (1,282) | (1,421) | (3,810) | (2,820)
Purchases | 0 | 0 | 5,481 | 86
Sales | (56) | (11,401) | (8,759) | (38,612)
Settlements | 0 | 0 | 0 | 0
Net transfers into (out of) Level 3 | 8,851 | 10,279 | 20,911 | 46,693
Ending balance | 32,959 | 15,249 | 32,959 | 15,249
Net unrealized gains (losses) included in net income | 1,192 | (1,977) | 2,994 | (1,250)
Loans held for sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 13,263 | 15,092 | 14,033 | 16,273
Acquired | 0 |  | 0 |
Net income | (80) | 443 | 671 | 1,259
Purchases | 0 | 0 | 0 | 10
Sales | 0 | 0 | 0 | 0
Settlements | (748) | (1,126) | (2,269) | (3,133)
Net transfers into (out of) Level 3 | 0 | 0 | 0 | 0
Ending balance | 12,435 | 14,409 | 12,435 | 14,409
Net unrealized gains (losses) included in net income | (80) | $ 443 | 671 | $ 1,259
Loans held for investment |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 0 |  | 0 |
Acquired | 13,746 |  | 13,746 |
Net income | (418) |  | (418) |
Purchases | 0 |  | 0 |
Sales | (2,927) |  | (2,927) |
Settlements | (2,312) |  | (2,312) |
Net transfers into (out of) Level 3 | 4,283 |  | 4,283 |
Ending balance | 12,372 |  | 12,372 |
Net unrealized gains (losses) included in net income | $ 367 |  | $ 367 |

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- Definition Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Acquisition + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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