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Asset Retirement Obligations - Schedule of Reconciliation of Beginning and Ending Carrying Amounts of Partnership's Asset Retirement Obligations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Balance, January 1 $ 4,973 $ 39
Liabilities incurred in current period, including aquisitions 5 4,697
Accretion expense 284 237
Acquisition related purchase price adjustments (2,280) 0
Balance, December 31 $ 2,982 $ 4,973