Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	$ 154,299	$ 146,967
Other comprehensive income	1,167	1,199
Balances	159,940	152,321
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	(993)	(71)
Balances	174	1,128
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balances	(993)	(71)
Other comprehensive income	1,167	1,199
Balances	$ 174	$ 1,128