Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Changes in balances of each component of accumulated other comprehensive income, net of taxes [Roll Forward]
Beginning Balance	$ 102,492	$ 104,195
Total other comprehensive income (loss), net of tax	1,246	(4,695)
Ending Balance	105,506	102,492
AOCI Attributable to Parent [Member]
Changes in balances of each component of accumulated other comprehensive income, net of taxes [Roll Forward]
Beginning Balance	4,584	9,279
Total other comprehensive income (loss), net of tax	1,246	(4,695)
Ending Balance	5,830	4,584
Unrealized Gains on Available-for-Sale Securities [Member]
Changes in balances of each component of accumulated other comprehensive income, net of taxes [Roll Forward]
Beginning Balance	4,584
Other comprehensive income before reclassifications	2,933
Amounts reclassified from accumulated other comprehensive income	(1,687)
Total other comprehensive income (loss), net of tax	1,246
Ending Balance	$ 5,830	$ 4,584