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MORTGAGE BANKING OPERATIONS - Single Family MSR Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Additions and amortization:
Amortization	$ 2,112	$ 4,579	$ 8,052	$ 15,453
Changes in fair value of MSR assumptions	1,989	747	16,615	7,186
Ending balance	77,811		77,811
Single family
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	76,481	59,872	61,584	49,966
Additions and amortization:
Originations	1,453	5,166	7,664	19,507
Amortization	(2,112)	(4,579)	(8,052)	(15,453)
Net additions and amortization	(659)	587	(388)	4,054
Changes in fair value of MSR assumptions	1,989	747	16,615	7,186
Ending balance	$ 77,811	$ 61,206	$ 77,811	$ 61,206

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Additions And Amortization [Abstract]

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Changes in the fair value of mortgage servicing rights due to modeled amortization.

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Servicing Asset at Fair Value, Additions and Amortization, Net

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The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
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-Subparagraph (b)
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) from changes in fair value classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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