Restructuring Costs (Schedule of restructuring expenses) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	$ 1,824
Restructuring charges incurred	397
Cash payments	(830)
Restructuring reserve, June 30, 2015	1,391
Lease termination costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	1,810
Restructuring charges incurred	89
Cash payments	(508)
Restructuring reserve, June 30, 2015	1,391
Other exit costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	0
Restructuring charges incurred	308
Cash payments	(308)
Restructuring reserve, June 30, 2015	0
One-time employee termination benefits [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	14
Restructuring charges incurred	0
Cash payments	(14)
Restructuring reserve, June 30, 2015	$ 0