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SALES OF SUBSIDIARY AND BUSINESS UNITS - Banc Home Loans Sale Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended	9 Months Ended
	Mar. 30, 2017	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MSRs sold		$ 0		$ 0		$ 39,186	$ 3
Net gain on disposal						13,749	0
Caliber
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unpaid balances of conventional agency mortgage loans	$ 3,860,000
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash premium payment	25,000
Book value of certain assets sold	2,500	2,455			$ 2,455	2,455
Income from earn-out					$ 228
MSRs sold	37,800		$ 37,800			37,772
Net gain on disposal	$ 13,700	$ 211		$ 0		$ 13,749	$ 0
Banc Home Loan | Discontinued Operations, Disposed of by Sale | Buyout Option, Future Earn-Out Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Earn-out performance period	38 months
Contingent consideration	$ 35,000

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