SUPPLEMENTAL CASH FLOW INFORMATION - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash paid for:
Interest on borrowings	$ 98,194	$ 93,634	$ 127,707
Income tax	7,175	4,037	3,198
Non-cash investing and financing activities:
Additions to OREO	48,767	47,711	47,808
Additions to auto and other repossed properties	52,023	40,987	52,628
Capitalization of servicing assets	3,864	3,318	5,260
Loan securitizations	233,175	235,074	338,333
Loans held for investment transferred to held for sale	90,319	0	10,332
Loans held for sale transferred to held for investment	2,179	10,234	1,443
Property plant and equipment transferred to other assets	$ 0	$ 1,185	$ 1,221