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Debt - Consolidated Debt Obligations (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Unamortized discounts [1] $ 0 $ (14,114)
Total debt 1,622,904 2,000,579
Current portion of long-term debt [2] (1,622,904) 0
Total long-term debt 0 2,000,579
OLLC $2.0 billion revolving credit facility, variable-rate, due March 2018    
Debt Instrument [Line Items]    
Revolving credit facility [3] 511,652 836,000
2021 Senior Notes, fixed-rate, due May 2021 [Member]    
Debt Instrument [Line Items]    
Senior Notes, fixed-rate [4],[5] 646,287 700,000
2022 Senior Notes, fixed-rate, due August 2022 [Member]    
Debt Instrument [Line Items]    
Senior Notes, fixed-rate [4],[6] 464,965 496,990
Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt issuance costs, net [1] $ 0 $ (18,297)
[1] Approximately $25.0 million in net discounts and deferred financing fees were written off due to a default and event of default and the uncertainty regarding anticipated financial covenant violation at December 31, 2016.
[2] Due to an existing and anticipated financial covenant violations, the Partnership’s revolving credit facility and senior notes were classified as current at December 31, 2016.
[3] The carrying amount of our revolving credit facility approximates fair value because the interest rates are variable and reflective of market rates.
[4] The estimated fair value is based on quoted market prices and is classified as Level 2 within the fair value hierarchy.
[5] The estimated fair value of our 2021 Senior Notes was $314.3 million and $210.0 million at December 31, 2016 and 2015, respectively.
[6] The estimated fair value of our 2022 Senior Notes was $223.2 million and $149.1 million at December 31, 2016 and 2015, respectively.