Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Current assets    
Cash and cash equivalents $ 499 $ 393
Accounts receivable 4,924 6,822
Unbilled revenue 24,619 23,001
Risk management assets 688 473
Other current assets 15,502 7,497
Current deferred tax asset 3,086 0
Current assets held for sale 52 272
Total current assets 49,370 38,458
Property, plant and equipment, net 582,182 312,701
Goodwill 142,236 16,447
Intangible assets, net 106,306 3,682
Investment in unconsolidated affiliates 22,252 0
Other assets, net 13,117 9,064
Noncurrent assets held for sale, net 1,181 1,723
Total assets 916,644 382,075
Current liabilities    
Accounts payable 20,326 3,261
Accrued gas purchases 14,326 17,386
Accrued expenses and other current liabilities 25,788 15,058
Current portion of long-term debt 2,908 2,048
Risk management liabilities 215 423
Current liabilities held for sale 12 114
Total current liabilities 63,575 38,290
Risk management liabilities 0 101
Asset retirement cost 34,645 34,636
Other liabilities 126 191
Long-term debt 372,950 130,735
Deferred Tax Liabilities 8,199 4,749
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent 0 95
Total liabilities 479,495 208,797
Commitments and contingencies (see Note 19)      
Series A convertible preferred units (5,745 thousand and 5,279 thousand units issued and outstanding as of December 31, 2014 and 2013, respectively) 107,965 94,811
Equity and partners' capital    
General Partner Interests (392 thousand and 185 thousand units issued and outstanding as of December 31, 2014 and 2013, respectively) (2,450) 2,696
Accumulated other comprehensive income 2 104
Total partners’ capital 324,467 73,839
Noncontrolling interests 4,717 4,628
Total equity and partners' capital 329,184 78,467
Total liabilities, equity and partners' capital 916,644 382,075
Limited Partner Common Units [Member]    
Equity and partners' capital    
Limited Partners' Capital Account 294,695 71,039
Limited Partner Series B Convertible Units [Member]    
Equity and partners' capital    
Limited Partners' Capital Account $ 32,220 $ 0