Debt Carrying and Estimated Fair Value Table (Details) (USD $)				0 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Feb. 05, 2013 7.875% Senior Notes	Mar. 31, 2013 7.875% Senior Notes	Mar. 31, 2013 7.5% Senior Notes [Member]	Dec. 31, 2012 7.5% Senior Notes [Member]	Mar. 31, 2012 7.5% Senior Notes [Member]	Mar. 31, 2013 4.25% Convertible senior notes [Member]	Dec. 31, 2012 4.25% Convertible senior notes [Member]	Mar. 31, 2012 4.25% Convertible senior notes [Member]	Mar. 31, 2013 ABL Revolver [Member]	Mar. 31, 2013 ABL Term Loan [Member]	Dec. 31, 2012 Credit facility revolving loan [Member]	Dec. 31, 2012 Credit Facility Term Loan [Member]	Mar. 31, 2012 Credit Facility Term Loan [Member]	Mar. 31, 2013 Other [Member]	Dec. 31, 2012 Other [Member]	Mar. 31, 2012 Other [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt				$ 457,000,000
Stated interest rate on debt instrument			4.25%			7.50%			4.25%
Debt, carrying value					421,956,000	0	106,438,000	106,438,000				27,586,000	7,500,000	40,000,000	305,250,000	317,625,000
Carrying value (convertible debt)									155,701,000	153,082,000	145,687,000
Carrying value (other)																	690,000	755,000	805,000
Debt, estimated fair value					446,000,000	0	106,000,000	107,000,000	183,000,000	174,000,000	184,000,000	27,500,000	7,500,000	38,000,000	296,000,000	317,000,000	700,000	700,000	800,000
Current portion of long-term debt	(1,755,000)	(65,008,000)	(16,730,000)
Total long-term debt	$ 611,678,000	$ 540,517,000	$ 553,825,000