Restructuring - Restructuring Reserve (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Reserve [Roll Forward]
Begining balance	$ 605	$ 763	$ 2,074
Provision	2,730	3,471	2,736
Reversal		(285)
Less: Payments	(3,017)	(3,344)	(4,047)
Ending balance	318	605	763
Severance & Personnel [Member]
Restructuring Reserve [Roll Forward]
Begining balance	0	0	423
Provision	1,102	1,102	0
Reversal		0
Less: Payments	(784)	(1,102)	(423)
Ending balance	318	0	0
Other Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Begining balance	605	763	1,651
Provision	1,628	2,369	2,736
Reversal		(285)
Less: Payments	(2,233)	(2,242)	(3,624)
Ending balance	$ 0	$ 605	$ 763