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Repurchase Agreements (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Repurchase Agreements [Abstract]    
Outstanding balance at December 31 $ 7,913 $ 9,460
Average interest rate at December 31 0.05% 0.04%
Average balance during the year $ 7,762 $ 17,825
Average interest rate during the year 0.05% 0.17%
Maximum month end balance during the year $ 10,539 $ 26,743