Long-Term Debt Long-term Debt Instruments (Details) (USD $)	12 Months Ended						1 Months Ended	12 Months Ended							12 Months Ended			12 Months Ended			12 Months Ended							12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2011 Revolving Credit Facility [Member]	Dec. 31, 2010 Revolving Credit Facility [Member]	Oct. 31, 2013 Secured Debt [Member] 9.25% Notes [Member]	Dec. 31, 2012 Secured Debt [Member] 9.25% Notes [Member]	Dec. 31, 2011 Secured Debt [Member] 9.25% Notes [Member]	Dec. 31, 2010 Secured Debt [Member] 9.25% Notes [Member]	Dec. 10, 2009 Secured Debt [Member] 9.25% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 7.875% Notes [Member]	Dec. 31, 2011 Unsecured Debt [Member] 7.875% Notes [Member]	Feb. 27, 2007 Unsecured Debt [Member] 7.875% Notes [Member]	Dec. 31, 2011 Unsecured Debt [Member] 7.75% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 7.75% Notes [Member]	Nov. 03, 2011 Unsecured Debt [Member] 7.75% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 6.625% Notes [Member]	Sep. 17, 2012 Unsecured Debt [Member] 6.625% Notes [Member]	Dec. 31, 2011 Unsecured Debt [Member] 6.625% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 5.25% Notes [Member]	Sep. 18, 2012 Unsecured Debt [Member] 5.25% Notes [Member]	Dec. 31, 2011 Unsecured Debt [Member] 5.25% Notes [Member]	Dec. 31, 2012 Foreign Credit Facilities [Member]	Dec. 31, 2011 Foreign Credit Facilities [Member]	Dec. 31, 2012 Capital Lease Obligations [Member]	Dec. 31, 2011 Capital Lease Obligations [Member]	Dec. 31, 2012 Class C [Member] Revolving Credit Facility [Member]	Dec. 31, 2012 Class D [Member] Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding				$ 0	$ 0																			$ 61,000,000	$ 45,200,000
Other expense - Debt refinancing and redemption costs	19,800,000	3,100,000	0					1,000,000	1,400,000												100,000							300,000
Long-term Debt								337,500,000	379,000,000			300,000,000	300,000,000		200,000,000	200,000,000		550,000,000		0	0		249,900,000
Capital Lease Obligations																										5,600,000	6,100,000
Line of Credit Facility, Maximum Borrowing Capacity																												72,800,000	365,000,000
Payments of Debt Issuance Costs	10,600,000	10,900,000	2,200,000	1,700,000	5,900,000	1,600,000				300,000					5,000,000			0
Line of Credit Facility, Remaining Borrowing Capacity				414,600,000
Line of Credit Facility, Standby Letters of Credit Issued Against the Facility				23,200,000
Increase in Revolving Credit Facility Aggregate Commitments				116,000,000
Debt Instrument, Face Amount											425,000,000			300,000,000			200,000,000		550,000,000			250.0
Debt Instrument, Interest Rate, Stated Percentage								9.25%				7.875%				7.75%		6.625%			0.00%
Debt Instrument, Tender Premium																					9,200,000
Debt Instrument, Tender Offer, Fees																					500,000
Debt Instrument, Repurchased Face Amount																						137,800,000
9.25% Notes, Percentage Redeemable							10.00%
9.25% Notes, Percentage Redeemed								10.00%	10.00%
9.25% Senior Secured Notes, Premium Percentage Applicable to Voluntary Redemption During the Period								103.00%	103.00%
9.25% Senior Secured Notes, Amount Voluntarily Redeemed During the Period	299,100,000	56,000,000	8,100,000					42,500,000	42,500,000
9.25% Senior Secured Notes, Amount Paid for Redemption Premium During the Period								1,300,000	1,300,000
Capital Leased Assets, Gross																										6,700,000	16,100,000
Capital Leases, Balance Sheet, Assets by Major Class, Net																										5,600,000	6,000,000
Debt Instrument, Unamortized Discount											5,500,000
Interest Costs, Capitalized During Period	8,200,000	8,300,000	4,000,000
Long-term Debt, Weighted Average Interest Rate	7.90%	8.00%	8.20%																							8.90%
Interest Payable, Current	35,100,000	32,000,000
Interest Expense	101,600,000	83,900,000	89,000,000
Debt Instrument, Decrease, Repayments								42,500,000													112,200,000
Debt Instrument, Make-whole Premium																					7,300,000
Debt Instrument, Unused Borrowing Capacity, Amount																								$ 15,100,000