UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 23,430	$ 20,357
Accounts receivable	53,345	67,877
Other assets	2,044	4,741
Total current assets	78,819	92,975
Property, plant and equipment, net	1,198,727	1,158,081
Intangible assets, net:
Favorable gas gathering contracts	17,010	17,880
Contract intangibles	367,146	383,306
Rights-of-way	101,923	100,991
Total intangible assets, net	486,079	502,177
Goodwill	115,888	115,888
Other noncurrent assets	13,621	14,618
Total assets	1,893,134	1,883,739
Current liabilities:
Trade accounts payable	29,670	25,117
Due to affiliate	1,578	653
Deferred revenue	2,609	1,555
Ad valorem taxes payable	6,883	8,375
Accrued interest	11,250	12,144
Other current liabilities	9,943	11,729
Total current liabilities	61,933	59,573
Long-term debt	726,000	586,000
Noncurrent liability, net	5,955	6,374
Deferred revenue	37,093	29,683
Other noncurrent liabilities	1,597	372
Total liabilities	832,578	682,002
Commitments and contingencies
Common limited partner capital (34,423,369 units issued and outstanding at June 30, 2014 and 29,079,866 units issued and outstanding at December 31, 2013)	702,298	566,532
Subordinated limited partner capital (24,409,850 units issued and outstanding at June 30, 2014 and December 31, 2013)	332,389	379,287
General partner interests (1,200,651 units issued and outstanding at June 30, 2014 and 1,091,453 issued and outstanding at December 31, 2013)	25,869	23,324
Summit Investments' equity in contributed subsidiaries	0	232,594
Total partners' capital	1,060,556	1,201,737
Total liabilities and partners' capital	$ 1,893,134	$ 1,883,739