Relocation and Restructuring Restructuring (Details) (USD $)	9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012 Restructuring [Member]	Sep. 30, 2012 Restructuring [Member]	Sep. 30, 2012 Restructuring - Severance Member]
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated due to restructuring				300
Restructuring and related cost, expected relocation costs in future periods			$ 4,000,000
Restructuring accrual included in Accrued Liabilities					3,000,000
Restructuring accrual included in Other Liabilities					4,000,000
Goodwill and other asset impairment charges related to restructuring	6,646,000	0		7,000,000
Goodwill, impairment loss related to restructuring				2,000,000
Restructuring Reserve [Roll Forward]
Beginning balance					0
Amounts expensed				16,000,000	8,939,000
Amounts paid					(1,781,000)
Ending balance					$ 7,158,000