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SHORT-TERM BORROWINGS - Summary of the Use of Short-Term Borrowings (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]      
Balance at year-end $ 52,000 $ 60,000 $ 65,000
Weighted average interest rate at year-end 0.76% 0.53% 0.36%
Average balance during the year $ 17,841 $ 55,106 $ 32,736
Average interest rate during the year 0.61% 0.43% 0.34%
Maximum month-end balance during the year $ 52,000 $ 83,500 $ 65,000