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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
	Mar. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 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		236			13,538	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
MSRs sold	37,800		$ 37,800		37,772
Net gain on disposal	$ 13,500	$ 236		$ 0	$ 13,538	$ 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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