CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 295	$ 182
Accounts receivable, trade, net of allowance of $1,253 and $363, respectively	79,452	52,641
Due from affiliates, net	2,322	10,548
Total current assets	82,069	63,371
Property, plant and equipment	2,399,934	1,794,545
Accumulated depreciation	(721,788)	(647,527)
Property, plant and equipment, net	1,678,146	1,147,018
Goodwill	127,757	124,019
Intangible and other assets, net	121,472	33,655
Total assets	2,009,444	1,368,063
Current liabilities:
Accrued liabilities	4,979	7,255
Accrued interest	11,876	5,940
Current portion of interest rate swaps	4,958	3,374
Total current liabilities	21,813	16,569
Long-term debt	1,300,295	757,955
Deferred income taxes	1,527	1,132
Other long-term liabilities	2,468	652
Total liabilities	1,326,103	776,308
Commitments and contingencies (Note 15)
Partners' capital:
Common units, 55,724,022 and 49,465,528 units issued, respectively	668,714	578,493
General partner units, 2% interest with 1,129,221 and 1,003,227 equivalent units issued and outstanding, respectively	19,542	16,780
Accumulated other comprehensive loss	(3,438)	(2,353)
Treasury units, 61,665 and 50,917 common units, respectively	(1,477)	(1,165)
Total partners' capital	683,341	591,755
Total liabilities and partners' capital	$ 2,009,444	$ 1,368,063