Annual report pursuant to Section 13 and 15(d)

Deposits - Summary of Interest Expense on Deposits (Detail)

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Deposits - Summary of Interest Expense on Deposits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Banking and Thrift [Abstract]      
Demand – interest-bearing $ 75 $ 114 $ 101
Money market and savings 6,470 4,195 4,758
Time deposits of $100,000 or more 6,605 6,639 4,321
Other time deposits 3,420 4,462 4,380
Total interest expense on deposits $ 16,570 $ 15,410 $ 13,560