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LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES - Contractual Amount of Financial Instruments with Off-Balance-Sheet Risk (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Commitments to extend credit    
Other Commitments [Line Items]    
Fixed Rate $ 40,312 $ 87,517
Variable Rate 99,026 82,818
Unused lines of credit    
Other Commitments [Line Items]    
Fixed Rate 6,044 20,631
Variable Rate 508,295 295,626
Letters of credit    
Other Commitments [Line Items]    
Fixed Rate 2,611 825
Variable Rate $ 11,278 $ 10,411