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SHORT-TERM BORROWINGS - Information Concerning Securities Sold under Agreements (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]      
Balance at year end $ 29,156 $ 21,742 $ 9,032
Weighted average interest rate at year-end 0.20% 0.20% 0.20%
Average balance during the year $ 30,156 $ 19,186 $ 13,772
Average interest rate during the year 0.20% 0.20% 0.20%
Maximum month-end balance during the year $ 37,558 $ 32,861 $ 19,105
Fair value of securities underlying the agreements at year-end $ 35,470 $ 38,337 $ 52,024