Restructuring (Summary of Restructuring Charges) (Details) (USD $)	3 Months Ended			12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Reserve [Roll Forward]
Expense	$ 3,556,000	$ 160,000	$ 14,747,000	$ 18,463,000	$ 0	$ 6,676,000
Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, January 1, 2012			0	0
Expense				12,000,000
Utilization				(7,400,000)
Restructuring Reserve, December 31, 2012				4,600,000
Other [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, January 1, 2012			0	0
Expense				2,600,000
Utilization				(900,000)
Restructuring Reserve, December 31, 2012				1,700,000
Severence and Other [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, January 1, 2012			0	0
Expense				14,600,000
Utilization				(8,300,000)
Restructuring Reserve, December 31, 2012				$ 6,300,000