Long-Term Indebtedness (Details) - USD ($)						12 Months Ended
	Jan. 15, 2021	Dec. 23, 2013	Jul. 15, 2013	Dec. 21, 2012	Dec. 20, 2011	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2015	Apr. 30, 2014	Mar. 31, 2012	Nov. 05, 2007
Summary of Long-term debt
Cash used to retire debt					$ 15,000,000
Interest Rate, Variable Rate Basis						LIBOR
Debt issuance costs						$ 11,916,000	$ 0	$ 2,660,000
Loss on debt extinguishment						6,557,000	0	789,000
Debt Issuance Cost						11,400,000
Long-term debt, gross						1,526,167,000
Interest Rate Cap
Summary of Long-term debt
Derivative, Notional Amount											$ 470,000,000
Derivative Cap (as a percent)											1.00%
Interest Rate Swap
Summary of Long-term debt
Derivative, Notional Amount										$ 200,000,000
Credit Facility Amendment 2012
Summary of Long-term debt
Reduction in interest rate (as a percent)				0.25%
Credit Facility Amendment 2013
Summary of Long-term debt
Excess Cash Available for General Corporate Purposes		$ 200,000,000
Loss on debt extinguishment								$ 800,000
Debt Issuance Cost		$ 2,400,000
Credit Facility 2011
Summary of Long-term debt
Debt Instrument, Face Amount					$ 1,135,000,000
Credit Facility 2011 - Revolving Loan
Summary of Long-term debt
Debt Instrument, Term					5 years
Line of Credit Facility, Maximum Borrowing Capacity					$ 200,000,000
Long-term Line of Credit							0
Letters of Credit Outstanding, Amount							$ 20,800,000
Commitment fee (as a percent)							0.375%
Credit Facility 2011 - Term Loans
Summary of Long-term debt
Proceeds utilized for repayment of existing debt					935,000,000
Credit Facility 2011 - Term Loan A
Summary of Long-term debt
Debt Instrument, Face Amount					$ 75,000,000
Debt Instrument, Term					5 years
Repayment of debt				$ 72,200,000
Credit Facility 2011 - Term Loan B
Summary of Long-term debt
Debt Instrument, Face Amount					$ 860,000,000
Debt Instrument, Term					7 years
Line of Credit Facility, Additional Contingent Borrowing Capacity					$ 300,000,000
Repayment of debt				277,800,000
Spread over variable rate (as a percent)					3.00%
Interest Rate, Variable Rate Basis					LIBOR
Interest Rate, Variable Rate Basis Floor					1.00%
Credit Facility 2011 - Term Loan B | Credit Facility Amendment 2013
Summary of Long-term debt
Reduction in interest rate (as a percent)		0.50%
Credit Facility 2011 - Term Loan B | Credit Facility Amendment 2013 | Variable Rate Basis Spread [Member]
Summary of Long-term debt
Reduction in interest rate (as a percent)		0.25%
Credit Facility 2011 - Term Loan B | Credit Facility Amendment 2013 | LIBOR Floor [Member]
Summary of Long-term debt
Reduction in interest rate (as a percent)		0.25%
Credit Facility 2011 - Term Loan B, As Amended 2013
Summary of Long-term debt
Spread over variable rate (as a percent)		2.75%
Interest Rate, Variable Rate Basis		LIBOR
Interest Rate, Variable Rate Basis Floor		0.75%
Long-term debt, gross						0	$ 570,544,000
Debt Instrument, Interest Rate, Effective Percentage							3.50%
Senior Unsecured 2021 Notes
Summary of Long-term debt
Debt Instrument, Face Amount				800,000,000
Proceeds utilized for repayment of existing debt				350,000,000
Remaining proceeds utilized for share repurchases and other corporate matters				$ 450,000,000
Frequency of periodic payment of interest				semi-annually
Long-term debt, gross						800,000,000	$ 800,000,000
Debt Instrument, Interest Rate, Stated Percentage				5.25%
Periodic payment of interest			$ 22,300,000	$ 21,000,000
Senior Unsecured 2021 Notes | Scenario, Forecast
Summary of Long-term debt
Periodic payment of interest	$ 21,000,000
HWP Refinance Loan
Summary of Long-term debt
Debt Instrument, Face Amount												$ 33,000,000
Long-term debt, gross						29,667,000	30,187,000
Debt Instrument, Interest Rate, Stated Percentage												6.72%
Monthly payments of principal and interest						200,000
Escrow Deposit						3,000,000	2,500,000
Old Debt - First Lien Amendment
Summary of Long-term debt
Repayment of debt					$ 950,000,000
Amended and Restated Revolving Loan [Member]
Summary of Long-term debt
Line of Credit Facility, Maximum Borrowing Capacity									$ 250,000,000
Interest Rate, Variable Rate Basis					LIBOR
Long-term Line of Credit						0
Letters of Credit Outstanding, Amount						$ 20,100,000
Frequency of periodic payment of interest					annual
Commitment fee (as a percent)						0.375%
Amended and Restated Term Loan B [Member]
Summary of Long-term debt
Debt Instrument, Face Amount									700,000,000
Line of Credit Facility, Additional Contingent Borrowing Capacity					$ 350,000,000				$ 350,000,000
Interest Rate, Variable Rate Basis		LIBOR
Interest Rate, Variable Rate Basis Floor		0.75%
Frequency of periodic payment of interest		annual
Long-term debt, gross						$ 696,500,000	$ 0
Debt Instrument, Interest Rate, Effective Percentage						3.50%
Debt Instrument, Quarterly Amortization						$ 1,800,000