Reportable Segments (EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reconciliation of total Adjusted EBITDA from reportable segments to net income (loss) from continuing operations
Total Adjusted EBITDA from reportable segments	$ 12,671	$ 13,434	$ 49,965	$ 47,064
Other expenses not allocated to reportable segments	(5,416)	(2,661)	(13,276)	(15,971)
Depreciation and amortization	(11,498)	(11,775)	(34,663)	(34,055)
Interest expense	(683)	(1,350)	(5,216)	(3,848)
Income tax expense	40	(82)	(536)	(333)
Loss on disposal of assets, net	(761)	(17)	(2,451)	(1,402)
Unit-based compensation	(451)	(301)	(1,393)	(803)
Total gain (loss) on commodity derivatives	94	(866)	(642)	(1,985)
Net cash payments for commodity derivatives settled during the period	550	8,373	1,082	14,400
Early settlement of commodity derivatives		(8,745)		(8,745)
Non-cash inventory costing adjustment	(1,353)		(227)
Corporate overhead support from general partner		(3,000)	(5,000)	(3,000)
Transaction costs and other	(84)	(211)	412	(2,930)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	$ (6,931)	$ (7,119)	$ (11,409)	$ (11,275)