Restructuring Restructuring Reserve Activity (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 4,663		$ 0	$ 1,406
Charges to Expense	1,132		4,663	5,817
Payments made / other	(1,758)		0	(7,223)
Ending Balance	4,037		4,663	0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	4,180		0	851
Charges to Expense	670		4,180	0
Payments made / other	(943)		0	(851)
Ending Balance	3,907		4,180	0
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0		0	555
Charges to Expense	0		0	0
Payments made / other	0		0	(555)
Ending Balance	0		0	0
Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0		0	0
Charges to Expense	280		0	2,767
Payments made / other	(280)		0	(2,767)
Ending Balance	0		0	0
Equipment Moving Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0		0	0
Charges to Expense	0		0	812
Payments made / other	0		0	(812)
Ending Balance	0		0	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	483		0	0
Charges to Expense	182		483	2,238
Payments made / other	(535)		0	(2,238)
Ending Balance	$ 130	[1]	$ 483	$ 0

[1] (1) The $3,907 of accrued employee termination costs will be paid through 2014. The $130 of other accrued costs relating to professional fees will be paid in 2013.