LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES - Contractual Amount of Financial Instruments with Off-Balance-Sheet Risk (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Commitments to extend credit
Other Commitments [Line Items]
Fixed Rate	$ 79,781	$ 74,777
Variable Rate	234,675	201,321
Unused lines of credit
Other Commitments [Line Items]
Fixed Rate	27,071	27,151
Variable Rate	925,872	888,236
Letters of credit
Other Commitments [Line Items]
Fixed Rate	2,056	1,784
Variable Rate	9,360	8,655
Banc Home Loan | Commitments to extend credit | Discontinued Operations
Other Commitments [Line Items]
Commitments to extend credit	$ 77,700	$ 65,100