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RESERVE FOR LOSS ON REPURCHASED LOANS - Summary of Activities in Reserve for Loss Reimbursements on Sold Loans (Detail) - Representations and Warranties Obligations and Corporate Guarantees - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Loss Contingency Accrual [Roll Forward]
Balance at beginning of period	$ 3,149	$ 8,028	$ 6,306	$ 7,974
Initial provision for loan repurchases	18	98	73	1,613
Subsequent change in the provision	(360)	(749)	(2,366)	(1,477)
Utilization of reserve for loan repurchases	(232)	(1,204)	(1,438)	(1,937)
Balance at end of period	$ 2,575	$ 6,173	$ 2,575	$ 6,173

X

- Definition

Loss Contingency, Accrual, Provision, Initial Loan Repurchases

+ References

No definition available.

+ Details

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- Definition

Loss Contingency Accrual, Provision, Initial Loan Repurchases, Adjustment

+ References

No definition available.

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X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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- Definition

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

+ References

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