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Long-Term Debt (Tables)
 9 Months Ended
Sep. 30, 2015
Debt Disclosure [Abstract]  
Schedule of long-term debt
Long-term debt consisted of the following (in thousands):
 
 
September 30, 2015
 
December 31, 2014
Revolving credit facility due July 2017
$
330,000

 
$
375,500

Partnership’s revolving credit facility due May 2018
554,000

 
460,000

Partnership’s term loan facility due May 2018
150,000

 
150,000

Partnership’s 6% senior notes due April 2021 (presented net of the unamortized discount of $4.0 million and $4.5 million, respectively)
345,982

 
345,528

Partnership’s 6% senior notes due October 2022 (presented net of the unamortized discount of $4.8 million and $5.2 million, respectively)
345,184

 
344,767

7.25% senior notes due December 2018
350,000

 
350,000

Other, interest at various rates, collateralized by equipment and other assets
738

 
1,107

Long-term debt
$
2,075,904

 
$
2,026,902