SALES OF SUBSIDIARY AND BUSINESS UNITS - Summary of net gain on disposal of discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash proceeds	$ 55,629	$ 0
MSRs sold	(39,186)	(3)
Net gain on disposal	13,302	0
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from the transaction	63,332
Compensation expense related to the transaction	(4,000)
Other transaction costs	(3,703)
Net cash proceeds	55,629
Book value of certain assets sold	(2,455)		$ (2,500)
MSRs sold	(37,772)
Goodwill	0			$ (2,100)
Net gain on disposal	$ 13,302	$ 0