SERVICING RIGHTS - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Transfers and Servicing [Abstract]
Income (loss) earned on mortgage servicing rights	$ 4,300	$ (5,300)
Loss on fair values of servicing rights	(1,900)	(10,200)
Revenue earned on mortgage servicing rights	6,200	4,900
Unpaid principal balance	4,150,000		$ 7,580,000
Escrow balances	14,900		$ 34,200
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MSRs sold	$ 39,186	$ 3
Discount rate	7.50%
Prepayment speed calculation percentage	7.50%
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MSRs sold	$ 37,772