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 Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 775	$ 868	$ 2,101	$ 1,848
Nonvested stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	141	263	382	651
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	625	537	1,595	1,072
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 9	$ 68	$ 124	$ 125