Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Document Fiscal Year Focus 2014    
Revenue $ 307,309 $ 294,051 $ 204,868
Gain (loss) on commodity derivatives, net 1,091 28 3,400
Total revenue 308,400 294,079 208,268
Operating expenses:      
Purchases of natural gas, NGLs and condensate 197,952 215,053 154,472
Direct operating expenses 45,702 32,236 17,183
Selling, general and administrative expenses 23,103 19,079 14,309
Equity compensation expense 1,536 2,094 1,783
Depreciation, amortization and accretion expense 28,832 30,002 21,287
Total operating expenses 297,125 298,464 209,034
Gain (loss) on involuntary conversion of property, plant and equipment 0 343 (1,021)
Gain (loss) on sale of assets, net (122) 0 123
Loss on impairment of property, plant and equipment (99,892) (18,155) 0
Operating income (loss) (88,739) (22,197) (1,664)
Other income (expenses):      
Interest expense (7,577) (9,291) (4,570)
Other expense (670) 0 0
Earnings in unconsolidated affiliates 348 0 0
Net income (loss) before income tax benefit (96,638) (31,488) (6,234)
Income Tax Expense (Benefit), Continuing Operations 557 (495) 0
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest (97,195) (30,993) (6,234)
Discontinued operations      
Gain (loss) from operations of disposal groups, net of tax (611) (2,413) (18)
Net income (loss) (97,806) (33,406) (6,252)
Less: Comprehensive income (loss) attributable to noncontrolling interests 214 633 256
Net income (loss) attributable to the Partnership (98,020) (34,039) (6,508)
Distribution declared per common unit (a) $ 1.85 $ 1.75 $ 1.73
Basic and diluted:      
Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership Unit, Basic $ (8.54) $ (7.15) $ (0.70)
Limited partners' net income (loss) from discontinued operations per unit (basic and diluted) $ (0.04) $ (0.27) $ 0.00
Limited partners’ net income (loss) per unit (basic and diluted) $ (8.58) $ (7.42) $ (0.70)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]      
Basic and diluted 13,472 7,525 9,113
Total Partners Capital      
Discontinued operations      
Net income (loss) attributable to the Partnership (98,020) (34,039) (6,508)
General Partner Interest      
Discontinued operations      
General Partner's Interest in net income (loss) (1,279) (1,405) (129)
Limited Partner [Member]      
Discontinued operations      
Limited Partners' Interest in net income (loss) (96,741) (32,634) (6,379)
Terminals [Member]      
Revenue   9,831  
Gain (loss) on commodity derivatives, net 0 0  
Total revenue 15,504    
Operating expenses:      
Purchases of natural gas, NGLs and condensate 0 0  
Direct operating expenses $ 6,342 $ 4,403