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NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Changes in Servicing Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Servicing Assets At Amortized Value [Line Items]      
Balance at beginning of period $ 26,244 $ 24,282 $ 22,838
Capitalization of servicing assets 3,318 5,260 4,919
Amortization (3,091) (3,229) (3,159)
Adjustment To Servicing Assets For Loans Repurchased [1] 395 256 (88)
Adjustment to fair value (1,611) (325) (228)
Balance at end of period $ 25,255 $ 26,244 $ 24,282
[1]
Amount represents the adjustment to fair value related to the repurchase of loans serviced for others.