Annual report pursuant to Section 13 and 15(d)

Securities - Realized Gains and Losses on Sales of Investment Securities (Detail)

v3.6.0.2
Securities - Realized Gains and Losses on Sales of Investment Securities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]      
Gross realized gains on sales of investment securities $ 396 $ 6,776 $ 2,012
Gross realized losses on sales of investment securities (350) (165) (1)
Net realized gains on sales of investment securities 46 6,611 2,011
Proceeds from sales of investment securities $ 78,282 $ 456,098 $ 169,533