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 loss	$ (31,282)		$ (11,553)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation, depletion and amortization	108,238		43,405
Loss on asset sales and disposal	1,594	[1]	1,374	[1]
Non-cash compensation expense	4,353		7,249
Amortization of deferred financing costs	3,711		5,797
Changes in operating assets and liabilities:
Accounts receivable, prepaid expenses and other	(3,410)		11,880
Accounts payable and accrued liabilities	(38,163)		(90,097)
Net cash provided by (used in) operating activities	45,041		(31,945)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(94,555)		(130,052)
Net cash paid for acquisitions	(517,453)
Other	(148)		(4,056)
Net cash used in investing activities	(612,156)		(134,108)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under credit facilities	838,000		249,000
Repayments under credit facilities	(676,000)		(600,425)
Net proceeds from issuance of long-term debt	97,500		267,811
Distributions paid to unitholders	(105,970)		(48,897)
Net proceeds from issuance of common limited partner units	426,393		320,221
Deferred financing costs, distribution equivalent rights and other	(10,643)		(1,892)
Net cash provided by financing activities	569,280		185,818
Net change in cash and cash equivalents	2,165		19,765
Cash and cash equivalents, beginning of year	1,828		23,188
Cash and cash equivalents, end of period	$ 3,993		$ 42,953

[1] Gain (loss) on asset sales and disposal, general and administrative expenses and interest expense have not been allocated to its reportable segments as it would be impracticable to reasonably do so for the periods presented.