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Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument    
Long-term debt $ 1,442,652 $ 1,441,724
Partnership’s term loan facility due May 2018    
Debt Instrument    
Long term debt gross 0 150,000
Less: Deferred financing costs, net of amortization 0 (353)
Long-term debt 0 149,647
Partnership’s 6% senior notes due April 2021 | Senior Notes    
Debt Instrument    
Long term debt gross 350,000 350,000
Less: Debt discount, net of amortization (2,874) (3,213)
Less: Deferred financing costs, net of amortization (3,852) (4,366)
Long-term debt $ 343,274 342,421
Interest rate (as a percent) 6.00%  
Partnership’s 6% senior notes due October 2022 | Senior Notes    
Debt Instrument    
Long term debt gross $ 350,000 350,000
Less: Debt discount, net of amortization (3,763) (4,076)
Less: Deferred financing costs, net of amortization (4,359) (4,768)
Long-term debt $ 341,878 341,156
Interest rate (as a percent) 6.00%  
Revolving Credit Facility | Revolving credit facility due November 2020    
Debt Instrument    
Long-term debt $ 65,500 99,000
Revolving Credit Facility | Partnership’s revolving credit facility due March 2022    
Debt Instrument    
Long-term debt 692,000 0
Revolving Credit Facility | Partnership’s revolving credit facility due May 2018    
Debt Instrument    
Long-term debt $ 0 $ 509,500