Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 44,498	$ 18,678
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation and amortization expenses	15,525	4,081
Amortization of debt issuance costs	787	416
Unit-based compensation expense	347	442
Loss (gain) on asset disposals and impairments	(4,748)	164
Changes in current assets and liabilities	14,041	5,923
Changes in non-current assets and liabilities	221	0
Net cash from operating activities	70,671	29,704
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Capital expenditures	(25,179)	(8,860)
Capital expenditure reimbursements	11	128
Proceeds from sale of assets	9,721	0
Net cash used in investing activities	(15,447)	(8,732)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Proceeds from issuance of common units, net of issuance costs	0	391,619
Proceeds from issuance of general partner units	0	8,319
Quarterly distributions to unitholders	(31,067)	(21,524)
Quarterly distributions to general partner	(5,485)	(1,400)
Payments on capital lease	(65)	(101)
Financing costs	(608)	(2,977)
Capital contributions by affiliate	1,401	1,252
Net cash from (used in) financing activities	(35,824)	375,188
INCREASE IN CASH AND CASH EQUIVALENTS	19,400	396,160
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	23,203	19,290
CASH AND CASH EQUIVALENTS, END OF PERIOD	42,603	415,450
SUPPLEMENTAL CASH FLOW DISCLOSURE OF NON-CASH ACTIVITIES:
Capital expenditures included in accounts payable at period end	12,774	6,401
Capital lease obligation	$ 0	$ 3,840