Long-Term Obligations - Summary of Long-Term Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt obligations less unamortized discount and debt issuance costs	$ 1,304,235	$ 1,264,333
Other Debt	1,819	1,801
Capital lease obligations	82,249	83,384
Long-term debt and capital lease obligations, including current maturities	1,386,484	1,347,717
Less — current portion	(43,877)	(38,320)
Current potion of long-term debt	1,342,607	1,309,397
Revolving credit
Debt Instrument [Line Items]
Principal amount	445,000	400,000
Less unamortized debt issuance costs	(3,866)	(4,093)
Debt obligations less unamortized discount and debt issuance costs	$ 441,134	$ 395,907
Effective interest rate (percentage)	2.49%	2.28%
Senior term notes
Debt Instrument [Line Items]
Principal amount	$ 863,500	$ 869,000
Less unamortized debt issuance costs	(2,448)	(2,605)
Debt obligations less unamortized discount and debt issuance costs	$ 861,052	$ 866,395
Effective interest rate (percentage)	2.51%	2.28%
Secured seller note
Debt Instrument [Line Items]
Debt obligations less unamortized discount and debt issuance costs	$ 230	$ 230
Stated interest rate (percentage)	10.00%	10.00%