NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Changes in Servicing Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Transfers and Servicing [Abstract]
Balance at beginning of period	$ 26,762	$ 27,428	$ 25,255
Purchases Of Servicing Assets	7,781	0	0
Capitalization of servicing assets	4,864	4,039	3,864
Amortization	(5,777)	(4,592)	(2,895)
Temporary impairment recoveries (charges), net	(206)	(43)	1,289
Adjustment to servicing assets for loans repurchased	(353)	(70)	(85)
Balance at end of period	$ 33,071	$ 26,762	$ 27,428