Restructuring Costs (Schedule of restructuring expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	$ 1,824
Restructuring charges incurred	192
Cash payments	(330)
Restructuring reserve, March 31, 2015	1,686
Lease termination costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	1,810
Restructuring charges incurred	36
Cash payments	(304)
Restructuring reserve, March 31, 2015	1,542
Other exit costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, December 31, 2014	0
Restructuring charges incurred	156
Cash payments	(12)
Restructuring reserve, March 31, 2015	144
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, March 31, 2015	$ 0