Significant Accounting Policies Offsetting Assets and Liabilities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
charges relating to business disposition	$ 10,116,000	$ (7,680,000)	$ 38,902,000	$ (1,777,000)
Deposits Paid for Securities Borrowed, at Carrying Value	0		0		0
Gross Amount of assets as Offset in Statement of Financial Position	0		0		0
Securities Borrowed	23,570,000		23,570,000		46,090,000
Financial Instruments, assets	0		0		0
Swap A [Member]
Deposits Paid for Securities Borrowed, at Carrying Value	0		0		0
Gross Amount of assets as Offset in Statement of Financial Position	0		0		0
Net amount of financial assets	11,969,000		11,969,000		20,560,000
Securities Borrowed	11,969,000		11,969,000		20,560,000
Financial Instruments, assets	0		0		0
Swap B [Member]
Deposits Paid for Securities Borrowed, at Carrying Value	0		0		0
Gross Amount of assets as Offset in Statement of Financial Position	0		0		0
Net amount of financial assets	11,601,000		11,601,000		20,011,000
Securities Borrowed	11,601,000		11,601,000		20,011,000
Financial Instruments, assets	0		0		0
Swap C [Member]
Deposits Paid for Securities Borrowed, at Carrying Value					0
Gross Amount of assets as Offset in Statement of Financial Position					0
Net amount of financial assets					2,896,000
Securities Borrowed					2,896,000
Financial Instruments, assets					0
Swap D [Member]
Deposits Paid for Securities Borrowed, at Carrying Value					0
Gross Amount of assets as Offset in Statement of Financial Position					0
Net amount of financial assets					2,623,000
Securities Borrowed					2,623,000
Financial Instruments, assets					0
Fair Value, Inputs, Level 2 [Member]
Interest Rate Swap Agreement Fair Value Disclosure	23,570,000		23,570,000		46,090,000
7.75% Senior Subordinated Notes, Due 2020 [Member]
Debt Instrument, Repurchased Face Amount	$ 150,000,000		$ 150,000,000