Long-term Debt - Senior Secured Credit Facility and Senior Notes (Details) - USD ($)		1 Months Ended	3 Months Ended
	Jan. 19, 2017	Jan. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Long-term Debt
Loss on early extinguishment of debt			$ 23,390,000
Long-term debt			1,458,373,000	$ 1,432,689,000
Senior Secured Credit Facility
Long-term Debt
Refinancing costs			1,700,000
Loss on early extinguishment of debt			2,300,000
Term loan amount outstanding			931,000,000
Long-term debt			931,000,000	976,845,000
Revolving credit facility
Long-term Debt
Term of debt	5 years
Maximum borrowing capacity	$ 700,000,000
Available borrowing capacity			546,900,000
Term loan amount outstanding			131,000,000
Letters of credit outstanding			22,100,000
Term Loan A Facility
Long-term Debt
Term of debt	5 years
Maximum borrowing capacity	$ 300,000,000
Variable interest rate	LIBOR
Term loan amount outstanding			300,000,000
Term Loan B Facility
Long-term Debt
Term of debt	7 years
Maximum borrowing capacity	$ 500,000,000
Variable interest rate	LIBOR
Variable interest rate spread (as a percent)	2.50%
Variable interest base rate floor rate (as a percent)	0.75%
Term loan amount outstanding			500,000,000
Senior Subordinated Notes, 5.875 Percent, Due November 2021
Long-term Debt
Loss on early extinguishment of debt			21,100,000
Long-term debt				300,000,000
Amount of debt extinguished			$ 300,000,000
Principal amount				$ 300,000,000
Interest rate (as a percent)			5.875%	5.875%
Senior Unsecured Notes 5.625 Percent Due January 15, 2027
Long-term Debt
Long-term debt			$ 400,000,000
Principal amount	$ 400,000,000		$ 400,000,000
Interest rate (as a percent)	5.625%		5.625%
Percentage of principal amount at which the entity may redeem notes from net proceeds raised in connection with an equity offering	105.625%
Percentage of the aggregate principal amount of the notes originally issued which must remain outstanding at redemption under terms of the notes	60.00%
Period from completion of equity offering, during which notes can be redeemed	180 days
Corporate airplane loan
Long-term Debt
Amount of debt extinguished		$ 20,800,000
Minimum | Term Loan A Facility
Long-term Debt
Variable interest rate spread (as a percent)	1.25%
Maximum | Term Loan A Facility
Long-term Debt
Variable interest rate spread (as a percent)	3.00%