Restructuring Schedule of components of restructuring charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Restructuring Cost and Reserve [Line Items]
Accruals	$ (258)			$ (107)
Non-cash items	5,512			5,512
Total	5,254	3,000	126	5,405	2,984
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Accruals	1			1
Non-cash items	0			0
Total	1			1
Asset Impairments [Member]
Restructuring Cost and Reserve [Line Items]
Accruals	(218)			(218)
Non-cash items	5,512			5,512
Total	5,294			5,294
Other Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Accruals	(74)			(74)
Non-cash items	0			0
Total	(74)			(74)
Other Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Accruals	33			184
Non-cash items	0			0
Total	$ 33			$ 184