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 Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 656	$ 495	$ 1,326	$ 980
Nonvested stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	123	187	241	388
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	486	268	970	535
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 47	$ 40	$ 115	$ 57