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FAIR VALUE MEASUREMENT - Schedule of Fair Value Changes and Activity for Level 3 (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Interest rate lock commitments |  |  |  |
Fair Value Changes and Activity for Level 3 [Roll Forward] |  |  |  |
Beginning balance | $ 6,488 | $ 13,502 | $ 17,392 | $ 2,223
Payoffs/Sales/Settlements | (7,877) | (7,801) | (15,312) | (12,284)
Change in mark to market/Realized/unrealized gains (losses) | 7,282 | 12,266 | 3,813 | 28,028
Ending balance | 5,893 | 17,967 | 5,893 | 17,967
Investment securities AFS |  |  |  |
Fair Value Changes and Activity for Level 3 [Roll Forward] |  |  |  |
Beginning balance | 2,490 | 2,885 | 2,710 | 1,952
Additions | 0 | 0 | 0 | 985
Transfers | 0 | 0 | 0 | 0
Payoffs/Sales/Settlements | (48) | (48) | (96) | (339)
Change in mark to market/Realized/unrealized gains (losses) | 108 | 24 | (64) | 263
Ending balance | 2,550 | 2,861 | 2,550 | 2,861
Single family LHFI |  |  |  |
Fair Value Changes and Activity for Level 3 [Roll Forward] |  |  |  |
Beginning balance | 4,324 | 4,926 | 7,108 | 3,468
Additions | 785 | 1,667 | 1,145 | 3,346
Transfers | 0 | 0 | 0 | 0
Payoffs/Sales/Settlements | 0 | (536) | (3,191) | (783)
Change in mark to market/Realized/unrealized gains (losses) | 98 | (210) | 145 | (184)
Ending balance | $ 5,207 | $ 5,847 | $ 5,207 | $ 5,847

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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- Definition Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 + Details
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