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Summary of Significant Accounting Policies - Changes in Partnership's Capitalized Dry Docking Costs (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Property, Plant and Equipment [Line Items] |  |  |
Beginning balance | $ 1,989,230 |  |
Cost incurred for dry docking | 10,357 | $ 13,471 | $ 27,203
Ending balance | 2,108,160 | 1,989,230 |
Dry-Docking Activity [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Beginning balance | 33,635 | 40,328 | 28,821
Cost incurred for dry docking | 10,357 | 13,471 | 27,203
Sales of vessels (note 15e) |  | (5,327) | (2,285)
Dry-dock amortization | (10,076) | (14,837) | (13,411)
Ending balance | $ 33,916 | $ 33,635 | $ 40,328

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