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SERVICING RIGHTS - Composition of Total Income (Loss) From Servicing Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Transfers and Servicing [Abstract]
Servicing fees for sold loans with servicing retained	$ 5,048	$ 19,642	$ 23,117
Losses on the fair value and runoff of servicing rights	(1,328)	(17,066)	(17,732)
Total income from servicing rights(1)	3,720	2,576	5,385
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loan servicing income	$ 0	$ 1,551	$ 4,752

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- Definition

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