Reconciliation of Partnership's Weighted Average Number of Common Limited Partner Units (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Distribution Made to Limited Partner [Line Items]
Weighted average number of common limited partner units - basic		$ 34,837	$ 29,286	$ 33,688	$ 29,258
Add effect of dilutive incentive awards	[1]	0	0	0	0
Weighted average number of common limited partner units - diluted		$ 34,837	$ 29,286	$ 33,688	$ 29,258

[1] The diluted weighted average number of limited partners' units outstanding presented on the consolidated statement of operations does not include 299,226 units and 193,172 units for the three months ended June 30, 2016 and 2015, respectively and 296,594 units and 187,758 units for the six months ended June 30, 2016 and 2015, as their effects would be anti-dilutive.