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SERVICING RIGHTS - Mortgage Servicing Rights (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended			21 Months Ended
	Mar. 30, 2017	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of year		$ 31,852	$ 31,852	$ 76,121	$ 49,939
Additions			0	12,127	49,293
Changes in fair value resulting from valuation inputs or assumptions			(1,155)	(10,240)	(5,709)
Sales of servicing rights		$ (28,500)	(28,549)	(39,345)	(5,382)
Other—loans paid off			(378)	(6,811)	(12,020)
Balance at end of year			1,770	31,852	$ 76,121	$ 1,770
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Servicing Asset at Fair Value, Amount [Roll Forward]
Sales of servicing rights	$ (37,800)		$ (28,500)	$ (37,772)		$ (37,772)

X

- Definition

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Decrease in servicing assets subsequently measured at fair value resulting from conveyance of servicing rights to unrelated parties.

+ References

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-SubTopic 50
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Amount of increase (decrease) in fair value from changes classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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