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, 2015
Dec. 31, 2014
Dec. 31, 2013
Banking and Thrift [Abstract]      
Savings $ 419 $ 1,646 $ 1,812
Money market checking and NOW accounts 3,890 3,213 2,912
Time deposits of $100,000 or more 6,639 4,321 4,094
Other time deposits 4,462 4,380 3,860
Total interest expense on deposits $ 15,410 $ 13,560 $ 12,678