Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ (144)	$ (19,624)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	93,257	82,153
(Gain) loss on sale of property	317	(14,367)
Impairments	0	1,311
Deferred tax benefit	(3,703)	(6,509)
Non-cash stock-based compensation	5,688	7,313
Derivatives mark to market interest rate settlement	0	(24,160)
Non-cash portion of derivatives (gain) loss	165	892
Non-cash portion of loss on debt extinguishment	0	5,396
Payment of interest paid-in-kind debt	0	(11,558)
Amortization of debt issue costs	5,278	5,213
Amortization of discount on notes	1,423	1,212
Changes in assets and liabilities:
Accounts receivable, accrued revenue and other	30,156	37,500
Natural gas and natural gas liquids, prepaid expenses and other	(3,468)	457
Accounts payable, accrued gas purchases and other accrued liabilities	(46,815)	(20,869)
Net cash provided by operating activities	82,154	44,360
Cash flows from (used in) investing activities:
Additions to property and equipment	(62,829)	(29,762)
Insurance recoveries on property and equipment	0	2,599
Proceeds from sale of property	425	60,053
Investment in limited liability company	(35,000)	0
Net cash provided by (used in) investing activities	(97,404)	32,890
Cash flows from (used in) financing activities:
Proceeds from borrowings	390,250	990,912
Payments on borrowings	(322,308)	(1,138,205)
Payments on capital lease obligations	(2,254)	(1,671)
Increase (decrease) in drafts payable	(103)	(5,214)
Debt refinancing costs	(3,936)	(28,520)
Conversion of restricted stock, net of shares withheld for taxes	(1,066)	(693)
Distributions to non-controlling partners in the Partnership	(42,753)	(6,511)
Common dividends	(13,025)
Conversion of restricted units, net of units withheld for taxes	(1,798)	(2,637)
Proceeds from exercise of Partnership unit options	513	571
Proceeds from issuance of Partnership units	0	120,786
Net cash provided by (used in) financing activities	3,520	(71,182)
Net decrease in cash and cash equivalents	(11,730)	6,068
Cash and cash equivalents, beginning of period	22,780	10,703
Cash and cash equivalents, end of period	11,050	16,771
Cash paid for interest	70,074	63,769
Cash paid for income taxes	$ 905	$ 1,500