Employee Benefit Plans (Schedule of Restricted Stock Plan) (Details) - 2008 Restricted Stock Plan [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Shares
Balance	148,000	127,000	117,000
Granted	24,000	33,000	33,000
Vested	(25,000)	(12,000)	(22,000)
Forfeited			(1,000)
Amortization of Compensation Expense
Balance	147,000	148,000	127,000
Unearned compensation
Balance	$ 1,696	$ 1,483	$ 1,216
Granted	750	741	711
Vested
Forfeited			(10)
Amortization of Compensation Expense	(682)	(528)	(434)
Balance	$ 1,764	$ 1,696	$ 1,483
Weighted Average Grant Price
Granted	$ 30.85	$ 22.65	$ 21.46