Long-Term Indebtedness (Details) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended			1 Months Ended	12 Months Ended			0 Months Ended		0 Months Ended	1 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended	12 Months Ended			1 Months Ended		0 Months Ended			0 Months Ended		12 Months Ended	0 Months Ended					0 Months Ended	1 Months Ended	12 Months Ended		1 Months Ended
	Dec. 21, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 21, 2012 2013	Dec. 21, 2012 2021	Dec. 20, 2011 New Credit Facility	Dec. 31, 2011 Revolving Loan	Dec. 31, 2013 Revolving Loan	Dec. 31, 2012 Revolving Loan	Dec. 20, 2011 Revolving Loan	Dec. 21, 2012 New Term Loans	Dec. 20, 2011 New Term Loans	Dec. 21, 2012 Term Loan A	Dec. 31, 2011 Term Loan A	Dec. 31, 2012 Term Loan A	Dec. 20, 2011 Term Loan A	Dec. 21, 2012 Term Loan B	Dec. 31, 2011 Term Loan B	Dec. 31, 2013 Term Loan B	Dec. 31, 2012 Term Loan B	Dec. 20, 2011 Term Loan B	Dec. 31, 2011 First Lien Amendment	Dec. 31, 2011 First Lien Senior Credit Facility	Dec. 21, 2012 Senior unsecured 2021 Notes	Dec. 31, 2013 Senior unsecured 2021 Notes	Dec. 31, 2012 Senior unsecured 2021 Notes	Dec. 23, 2013 Credit Facility Pre-2013 Amendment	Dec. 23, 2013 2013 Credit Facility Amendment	Dec. 31, 2013 2013 Credit Facility Amendment	Dec. 23, 2013 2013 Credit Facility Amendment Credit Facility Amendment, Reduction in Variable Rate Floor	Dec. 23, 2013 2013 Credit Facility Amendment Credit Facility Amendment, Reduction in Basis Spread on Variable Rate	Dec. 31, 2013 HWP Refinance Loan	Dec. 31, 2012 HWP Refinance Loan	Apr. 30, 2010 HWP Refinance Loan	Dec. 21, 2012 2012 Credit Facility Amendment	Nov. 30, 2007 HWP Construction term loan	Dec. 31, 2013 HWP HWP Refinance Loan	Dec. 31, 2012 HWP HWP Refinance Loan	Mar. 31, 2012 Interest rate contract	Feb. 29, 2008 Interest rate contract
Summary of Long-term debt
Maximum borrowing capacity of revolving loan							$ 1,135,000,000		$ 0	$ 0	$ 200,000,000																								$ 33,000,000
Debt maturity period (in years)								5 years							5 years				7 years
Face amount of Term Loans													935,000,000				75,000,000					860,000,000
Additional borrowing capacity																			300,000,000
Cash used to retire debt																							15,000,000
Increase in refinance loan		1,407,039,000																		576,366,000	582,187,000			950,000,000		800,000,000	800,000,000						30,673,000	31,128,000
Debt instrument, additional borrowings amount																									800,000,000
Proceeds utilized for repayment of existing debt																									350,000,000				200,000,000
Repayment of debt														72,200,000				277,800,000																			31,000,000
Remaining proceeds utilized for share repurchases and other corporate matters																									450,000,000
Reduction in interest rate (as a percent)																													0.50%		0.25%	0.25%				0.25%
Spread over variable rate (as a percent)																												3.00%	2.75%
Debt instruments base rate									LIBOR							LIBOR				LIBOR									LIBOR											LIBOR	LIBOR
Interest rate, variable interest rate floor (as a percent)																				0.75%								1.00%	0.75%
Component of agreement for Term loan B																																								470,000,000
Derivative Cap (as a percent)																																								1.00%
Debt issuance costs		2,660,000	16,878,000	16,584,000																										2,400,000
Loss on debt extinguishment		789,000	587,000	46,520,000								(600,000)
Letter of credit amount excluded from borrowing capacity									18,800,000	18,200,000																								1,000,000
Frequency of periodic payment of interest									annual											annual					semi-annually
Commitment fee (as a percent)									0.375%	0.50%
Debt instrument, interest rate at period end (as a percent)																				3.50%	4.00%
Quarterly amortization																				1,500,000
Accrued interest on debt instrument (as a percent)																									5.25%													6.72%
Periodic payment of interest	21,000,000				22,300,000	21,000,000
Monthly payments of principal and interest																																						200,000
Amount deposited into escrow																																						$ 1,800,000	$ 1,200,000