Securities Sold Under Agreements To Repurchase (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Securities sold under agreements to repurchase, carrying value	$ 11,200	$ 18,700
U.S. government agency residential mortgage-backed securities
Offsetting Liabilities [Line Items]
Securities sold under agreements to repurchase, collateral	$ 25,400	25,300
Securities sold under agreements to repurchase, minimum percentage of collateral pledged above the gross outstanding balance	15.00%
Securities sold under agreements to repurchase
Offsetting Liabilities [Line Items]
Average daily balance during the period	$ 14,347	$ 18,144
Average interest rate during the period	0.25%	0.27%
Maximum month end balance during the period	$ 18,695	$ 20,832
Weighted average interest rate at period-end	0.19%	0.26%