SUPPLEMENTAL CASH FLOW INFORMATION - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for:
Interest on borrowings	$ 68,668	$ 94,872	$ 107,010
Income tax	15,477	16,713	13,495
Operating cash flow from operating leases	19,328	13,464	10,219
Non-cash investing and financing activities:
Additions to OREO	19,348	7,249	40,398
Additions to auto and other repossed properties	33,408	36,203	47,643
Capitalization of servicing assets	5,194	4,864	4,039
Loan securitizations	191,434	221,491	235,258
Loans held for investment transferred to held for sale	33,010	10,817	24,470
Payable On Unsettled Securities Purchases		24,033	0
ROU asset obtained in exchange for operating lease liabilities	4,553	1,328	10,762
Adoption of lease accounting standard:
ROU assets operating leases	90,319	103,186
Operating Lease Liability	93,772	106,502
Acquisition (see Note 2):
Consideration	584	1,280,424	0
Fair value of assets acquired	$ 605	5,561,564	0
Liabilities assumed		4,291,674	0
Accounting Standards Update 2016-02 [Member]
Adoption of lease accounting standard:
ROU assets operating leases		0	57,178
Operating Lease Liability		$ 0	$ 59,818