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SALE OF BUSINESS UNIT (DISCONTINUED OPERATIONS) - Banc Home Loans Sale Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Mar. 30, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MSRs sold		$ 25,979	$ 39,186
Net gain on disposal		1,003	13,302
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	0	2,455	$ 0
Income from earn-out		635		1,700
MSRs sold	$ 37,800	0	37,772	37,772
Reversal of accrued liabilities		1,000
Net gain on disposal		$ 1,003	$ 13,302	$ 14,799
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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