Stock-based Compensation (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation [Abstract]
Stock-based compensation expense	$ 616	$ 500	$ 1,817	$ 1,445
2015	616		616
2016	2,096		2,096
2017	1,864		1,864
2018	1,337		1,337
2019	584		584
2020	63		63
Total	$ 6,560		$ 6,560