Debt (Details) (USD $)	12 Months Ended						12 Months Ended		0 Months Ended	12 Months Ended			12 Months Ended				1 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended					0 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended						0 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 2011 Credit Agreement item	Dec. 31, 2012 2011 Credit Agreement	Apr. 02, 2011 2011 Credit Agreement	Dec. 31, 2013 2011 Credit Agreement Minimum	Dec. 31, 2013 2011 Credit Agreement Maximum	Sep. 27, 2013 2011 term loan A	Dec. 31, 2013 2011 term loan A	Dec. 31, 2012 2011 term loan A	Apr. 02, 2011 2011 term loan A	Dec. 31, 2013 2011 term loan B	Dec. 31, 2012 2011 term loan B	Apr. 02, 2011 2011 term loan B	Dec. 31, 2013 2011 term loan B Minimum	Mar. 31, 2013 Term Loan A and Term Loan B	Dec. 31, 2013 Revolving Credit Facility	Apr. 02, 2011 Revolving Credit Facility	Nov. 21, 2012 9.875% senior notes	Dec. 31, 2013 9.875% senior notes	Dec. 31, 2012 9.875% senior notes	Nov. 21, 2012 9.875% senior notes Prior to December 15, 2015	Dec. 31, 2013 9.875% senior notes Prior to December 15, 2016	Dec. 31, 2013 9.875% senior notes During the twelve months commencing December 15, 2016	Dec. 31, 2013 9.875% senior notes During the twelve months commencing December 15, 2017	Dec. 31, 2013 9.875% senior notes After December 15, 2018	Nov. 21, 2012 9.875% senior notes Maximum Prior to December 15, 2015	Mar. 27, 2013 8.50% senior notes	Mar. 31, 2013 8.50% senior notes	Dec. 31, 2013 8.50% senior notes	Mar. 31, 2013 8.50% senior notes Prior to April 15, 2016	Mar. 31, 2013 8.50% senior notes Prior to April 15, 2017	Mar. 31, 2013 8.50% senior notes During the twelve months commencing April 15, 2017	Mar. 31, 2013 8.50% senior notes During the twelve months commencing April 15, 2018	Mar. 31, 2013 8.50% senior notes Period commencing April 15, 2019	Mar. 31, 2013 8.50% senior notes Maximum Prior to April 15, 2016	Sep. 27, 2013 9.50% senior secured notes due 2019	Dec. 31, 2013 9.50% senior secured notes due 2019	Sep. 27, 2013 9.50% senior secured notes due 2019 Prior to October 15, 2015	Sep. 27, 2013 9.50% senior secured notes due 2019 Prior to October 15, 2016	Sep. 27, 2013 9.50% senior secured notes due 2019 During the twelve months commencing October 15, 2016	Sep. 27, 2013 9.50% senior secured notes due 2019 During the twelve months commencing October 15, 2017	Sep. 27, 2013 9.50% senior secured notes due 2019 Period commencing October15, 2018	Sep. 27, 2013 9.50% senior secured notes due 2019 Maximum Prior to October 15, 2015	Dec. 31, 2013 Other	Dec. 31, 2012 Other
Debt instrument
Total debt	$ 2,778,832,000	$ 2,416,165,000								$ 401,052,000	$ 756,974,000		$ 968,581,000	$ 1,127,770,000							$ 496,831,000	$ 496,510,000									$ 450,000,000								$ 447,492,000							$ 14,876,000	$ 34,911,000
Less current debt	(9,210,000)	(18,793,000)
Total long term debt	2,769,622,000	2,397,372,000
Weighted average stated interest rate (as a percent)										5.74%			6.75%								9.88%										8.50%								9.50%
Interest rate (as a percent)																				9.875%	9.875%										8.50%								9.50%
Aggregate principal amount										406,600,000		950,000,000	978,200,000		1,400,000,000						500,000,000																		450,000,000
Maximum amount of unrestricted cash and cash equivalents which may be subtracted from total indebtness				240,000,000
Debt agreements
Debt instrument, description of variable rate basis										LIBOR or CDOR			LIBOR or CDOR					LIBOR or CDOR
Basis spread on variable rate (as a percent)										5.50%			5.75%					5.50%
Commitment fee on the unused portion (as a percent)																		0.50%
Debt repayment schedule, excluding interest
2014	9,210,000																																													9,210,000
2015	311,550,000									305,941,000																																				5,609,000
2016	100,682,000									100,625,000																																				57,000
2018	978,178,000												978,178,000
Thereafter	1,400,000,000																				500,000,000										450,000,000								450,000,000
Debt issued																				500,000,000										450,000,000								450,000,000
Debt issuance price as a percentage of face amount																				99.302%
Proceeds from debt	897,412,000	496,510,000	2,350,000,000																																			245,700,000
Extinguishment of debt									250,000,000								250,000,000
Capitalized debt issuance costs expensed									5,200,000																				6,000,000
Gain on partial extinguishment of debt									4,300,000
Aggregate principal of debt redeemed (as a percent)																												35.00%									35.00%								35.00%
Redemption price of debt instrument (as a percent)																					101.00%		109.875%	100.00%	104.938%	102.469%	100.00%				101.00%	108.50%	100.00%	104.25%	102.125%	100.00%			101.00%	109.50%	100.00%	107.125%	102.375%	100.00%
Unamortized debt issuance discount																					3,200,000																		2,500,000
Maximum borrowing capacity						2,725,000,000													375,000,000
General investment basket available amount				325,000,000
Leverage ratio for permitted acquisitions and unlimited unsecured debt				4.50
Increase in additional borrowings available, provided that specified percentage of the proceeds will be used to repay the term loans under the 2011 credit agreement								1,000,000,000
Rate of LIBOR floor (as a percent)																1.00%
Number of amendments completed				3
Increase in interest margin from existing levels (as a percent)							2.50%	3.00%
Additional minimum liquidity covenant amount				225,000,000
Senior secured leverage ratio (as a percent)							5.50
Additional capital expenditures covenant amount in 2013				175,000,000
Additional capital expenditures covenant amount in 2014				200,000,000
Potential unused capital spending that may be carried forward				20,000,000
Increased capital expenditures covenant amount in 2014, if carryforward from prior year is utilized								220,000,000
Percentage of net proceeds of additional debt issuances in excess of specified amount that is required to be used for the repayment of term loans				100.00%
Amount of net proceeds from additional debt issuances, that if in excess of, is required to be used for the repayment of term loans					250,000,000
Secured leverage ratio requirement for restriction on cash dividends allowed in any fiscal quarter				4.50
Maximum revolver sublimit borrowing capacity in Canada																		275,000,000	150,000,000
Outstanding borrowings																		0
Availability for future borrowings under the Revolver				326,500,000
Outstanding letters of credit				$ 48,500,000