Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 11,433	$ 4,922
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,264	23,851
Amortization of debt issue costs, discount	874	924
Unit-based compensation expense	2,102	567
Net (gain) loss on sale of assets	(2,291)	105
Changes in assets and liabilities:
Accounts receivable	(7,085)	(2,122)
Inventory	(921)	(1,665)
Prepaids	581	370
Other noncurrent assets	(79)	3,838
Accounts payable	(10,012)	(7,074)
Accrued liabilities and deferred revenue	3,803	1,793
Net cash provided by operating activities	31,669	25,509
Cash flows from investing activities:
Capital expenditures	(188,506)	(52,889)
Proceeds from sale of property and equipment	411	71
Net cash used in investing activities	(188,095)	(52,818)
Cash flows from financing activities:
Proceeds from long-term debt	269,470	101,143
Payments on long-term debt	(238,444)	(250,457)
Net proceeds from issuance of common units	137,278	180,555
Cash distributions	(12,087)	(4,030)
General partner contribution	294	129
Financing costs	(85)	(31)
Net cash provided by financing activities	156,426	27,309
Cash and cash equivalents, beginning of period	7	7
Cash and cash equivalents, end of period	7	7
Supplemental cash flow information:
Cash paid for interest	6,161	5,480
Cash paid for taxes	$ 115	$ 196