Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Restructuring activities [Abstract]
Beginning balance	$ 222
Charges to expense	1,229
Payments	(238)
Ending balance	1,213
Employee Termination Costs [Member]
Restructuring activities [Abstract]
Beginning balance	219
Charges to expense	133
Payments	(151)
Ending balance	201
Contract Exit Costs [Member]
Restructuring activities [Abstract]
Beginning balance	3
Charges to expense	1,096
Payments	(87)
Ending balance	$ 1,012