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Securities - Activity for Available-for-Sale (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]    
Proceeds from calls and maturities $ 5,965 $ 2,165
Proceeds from sales of securities available for sale 91,409 60,161
Realized gains 519 1,258
Realized losses (180) (329)
Net impairment loss recognized in earnings $ 0 $ 0