Debt (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended										3 Months Ended	9 Months Ended					9 Months Ended				3 Months Ended	9 Months Ended				1 Months Ended			1 Months Ended							1 Months Ended			1 Months Ended													1 Months Ended	3 Months Ended	1 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2013 Credit Agreement	Aug. 07, 2013 Credit Agreement USD ($)	Dec. 31, 2012 Credit Agreement	Sep. 30, 2013 Credit Agreement CAD Canada Company	Sep. 30, 2013 Credit Agreement Minimum	Sep. 30, 2013 Credit Agreement Maximum	Dec. 31, 2012 Credit Agreement Maximum	Sep. 30, 2012 Revolving Credit Facility USD ($)	Sep. 30, 2012 Revolving Credit Facility USD ($)	Dec. 31, 2012 Revolving Credit Facility USD ($)	Sep. 30, 2013 Revolving Credit Facility USD USD ($)	Sep. 30, 2013 Revolving Credit Facility EUR EUR (€)	Sep. 30, 2013 Revolving Credit Facility CAD	Sep. 30, 2013 Revolving Credit Facility Minimum	Sep. 30, 2013 Revolving Credit Facility Maximum	Aug. 07, 2013 Term Loan Facility USD ($)	Dec. 31, 2012 Term Loan Facility USD ($)	Sep. 30, 2013 New Revolving Credit Facility USD ($)	Sep. 30, 2013 New Revolving Credit Facility USD ($)	Aug. 07, 2013 New Revolving Credit Facility USD ($)	Sep. 30, 2013 The 7 1/4% Notes USD ($)	Dec. 31, 2012 The 7 1/4% Notes USD ($)	Aug. 31, 2013 Senior Subordinated Subsidiary Notes CAD	Sep. 30, 2013 Senior Subordinated Subsidiary Notes	Dec. 31, 2012 Senior Subordinated Subsidiary Notes USD ($)	Aug. 31, 2013 The 8% Notes USD ($)	Sep. 30, 2013 The 8% Notes	Dec. 31, 2012 The 8% Notes USD ($)	Sep. 30, 2013 The 6 3/4% Notes USD ($)	Dec. 31, 2012 The 6 3/4% Notes USD ($)	Sep. 30, 2013 The 7 3/4% Notes USD ($)	Dec. 31, 2012 The 7 3/4% Notes USD ($)	Aug. 31, 2013 The 8% Notes due 2020 USD ($)	Sep. 30, 2013 The 8% Notes due 2020	Dec. 31, 2012 The 8% Notes due 2020 USD ($)	Aug. 31, 2013 The 8 3/8% Notes USD ($)	Sep. 30, 2013 The 8 3/8% Notes USD ($)	Dec. 31, 2012 The 8 3/8% Notes USD ($)	Sep. 30, 2013 Senior Subsidiary Notes USD ($)	Aug. 31, 2013 Senior Subsidiary Notes CAD	Dec. 31, 2012 Senior Subsidiary Notes	Sep. 30, 2013 6% Notes USD ($)	Aug. 31, 2013 6% Notes USD ($)	Dec. 31, 2012 6% Notes	Sep. 30, 2013 The 5 3/4% Notes USD ($)	Dec. 31, 2012 The 5 3/4% Notes USD ($)	Sep. 30, 2013 Real Estate Mortgages, Capital Leases and Other USD ($)	Dec. 31, 2012 Real Estate Mortgages, Capital Leases and Other USD ($)	Aug. 31, 2013 The CAD Senior Subordinated Subsidiary Notes, 8% Notes, 8% Notes due 2020 and 8.375% Notes USD ($)	Sep. 30, 2013 Revolving Credit Facility and Term Loan USD ($)	Aug. 31, 2013 6% Notes and Senior Subsidiary Notes USD ($)
Debt
Carrying Amount	$ 4,025,332		$ 4,025,332		$ 3,825,003										$ 55,500	$ 380,650	€ 40,715	91,000				$ 462,500	$ 523,968	$ 523,968		$ 242,460	$ 242,813			$ 175,875			$ 49,834	$ 343,130	$ 335,152	$ 400,000	$ 400,000			$ 300,000		$ 411,486	$ 548,518	$ 194,100			$ 600,000			$ 1,000,000	$ 1,000,000	$ 310,188	$ 254,811
Less Current Portion	(51,533)		(51,533)		(92,887)
Long-term Debt, Net of Current Portion	3,973,799		3,973,799		3,732,116
Fair Value															55,500							462,500	523,968	523,968		242,460	242,813			181,591			56,052	347,924	341,753	438,950	451,000			317,250		443,810	610,500	191,189			592,500			897,000	1,012,500	310,188	254,811
Stated interest rate (as a percent)																										7.25%	7.25%		7.50%	7.50%		8.00%	8.00%	6.75%	6.75%	7.75%	7.75%		8.00%	8.00%		8.375%	8.375%	6.125%		6.125%	6.00%		6.00%	5.75%	5.75%
Capital stock of subsidiaries pledged to secure debt (as a percent)						66.00%		66.00%	66.00%
Ownership in U.S. subsidiaries that are considered guarantor (as a percent)	100.00%		100.00%
Maximum borrowing capacity																									1,500,000
Optional expanded maximum borrowing capacity							2,000,000
Principal amount of notes eliminated																					500,000
Write-off of deferred financings costs																																																							5,544
Commitment fee (as a percent)																			0.30%	0.50%
Letters of credit outstanding																							2,316	2,316
Period of earnings before interest, taxes, depreciation and amortization (EBITDA) for calculation of remaining borrowing capacity																								12 months
Remaining availability under credit facility																							973,716	973,716
Effective interest rate (as a percent)																			2.40%	4.50%			2.70%	2.70%
Commitment fees and letters of credit fees													562	1,611									977	2,133
Debt covenants
Net total lease adjusted leverage ratio						4.9					6.5
Net secured debt lease adjusted leverage ratio						2.0					4.0
Bond leverage ratio, per indentures						4.9		5.3			6.5	6.5
Fixed charge coverage ratio						2.4				1.5
Aggregate principal amount of public offering																																													200,000			600,000
Senior notes issued as a percent of par																																																								100.00%
Net proceeds from sales of senior notes			782,307																																																					782,307
Aggregate principal amount outstanding																												175,000			50,000							300,000			137,500
Redemption price (as a percent)																												102.50%			102.70%							104.00%			109.80%
Early extinguishment of debt	$ (43,662)	$ (10,628)	$ (43,662)	$ (10,628)																																																		$ (38,118)