Summary of Effect of Restatement Adjustments on Partnership's Consolidated Statements of Partners' Capital (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			$ 181,546
Net loss	$ (8,651)	$ (4,644)	(16,126)	$ (13,154)
Ending Balance	195,904		195,904
Common Limited Partners
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			181,531
Net loss			(18,299)
Ending Balance	196,536		196,536
General Partner
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			15
Net loss			2,173
Ending Balance	(632)		(632)
As Filed
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			183,678
Net loss	(9,079)	(4,848)	(16,738)	(13,731)
Ending Balance	197,424		197,424
As Filed | Common Limited Partners
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			193,716
Net loss			(16,542)
Ending Balance	210,478		210,478
As Filed | General Partner
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			(10,038)
Net loss			(196)
Ending Balance	(13,054)		(13,054)
Restatement Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			(2,132)
Net loss	428	$ 204	612	$ 577
Ending Balance	(1,520)		(1,520)
Restatement Adjustments | Common Limited Partners
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			(12,185)
Net loss			(1,757)
Ending Balance	(13,942)		(13,942)
Restatement Adjustments | General Partner
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Beginning Balance			10,053
Net loss			2,369
Ending Balance	$ 12,422		$ 12,422