Stock-based Compensation (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation [Abstract]
Stock-based compensation expense	$ 648	$ 507	$ 1,200	$ 944
2015	1,231		1,231
2016	2,093		2,093
2017	1,860		1,860
2018	1,334		1,334
2019	580		580
2020	61		61
Total	$ 7,159		$ 7,159