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Securities Sold Under Agreements to Repurchase and Federal Funds Purchased (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Securities Sold Under Agreements to Repurchase      
Total outstanding at December 31 $ 69,062 $ 136,513 $ 147,037
Maximum month-end balance 125,063 146,397 160,295
Average balance during the year $ 99,622 $ 137,917 $ 145,876
Weighted average rate at December 31 0.88% 1.90% 1.83%
Average interest rate paid during the year 2.24% 1.96% 2.02%
Federal Funds Purchased      
Average balance during the year $ 0 $ 0 $ 0
Average interest rate paid during the year 0.00% 0.00% 0.00%