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SERVICING RIGHTS - Additional Information (Detail) - 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	Dec. 31, 2016
Transfers and Servicing [Abstract]
Income (loss) earned on mortgage servicing rights		$ 132		$ (3,300)	$ 4,400	$ (8,600)
Loss on fair values of servicing rights		(4,500)		(8,600)	(6,400)	(18,700)
Revenue earned on mortgage servicing rights		4,600		5,200	10,800	10,100
Unpaid principal balance		4,400,000			4,400,000		$ 7,580,000
Escrow balances		25,500			25,500		$ 34,200
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MSRs sold		$ 0		$ 0	$ 39,186	$ 3
Discount rate					7.50%
Prepayment speed calculation percentage					7.50%
Banc Home Loan | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MSRs sold	$ 37,800		$ 37,800		$ 37,772

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Bank Servicing Fees, Gross, and Disposal Group, Including Discontinued Operation, Bank Servicing Fees, Gross

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- Definition

Continuing Involvement with Derecognized Transferred Financial Assets, Recorded Escrow Balance

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- Definition

Servicing Asset at Amortized Cost, Discount Rate

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Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that have been derecognized. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=82924980&loc=d3e107314-111719

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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