Long-Term Obligations - Schedule of Principal Payments for Senior Credit Facility (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
2017	$ 33,000
2018	44,000
2019	55,000
2020	77,000
Thereafter	1,060,000
Revolving loans
Debt Instrument [Line Items]
2017	0
2018	0
2019	0
2020	0
Thereafter	400,000
Senior term notes
Debt Instrument [Line Items]
2017	33,000
2018	44,000
2019	55,000
2020	77,000
Thereafter	$ 660,000