Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
Cash Flows from Operating Activities:
Net income	$ 78,185	[1]	$ 35,994
Plus loss (Less Income) from discontinued operations, net of taxes	(14,247)		162
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion, and amortization	163,141		118,103
Accretion of asset retirement obligation	3,482		2,927
Deferred income taxes	36,332		26,151
Stock-based compensation expense	9,281		7,550
Other	(1,410)		473
Change in assets and liabilities-
Decrease in accounts receivable	6,694		1,837
Increase (decrease) in accounts payable and accrued liabilities	8,077		(5,812)
Decrease in income taxes payable	(234)		(38)
Increase (decrease) in accrued interest	(787)		6,394
Cash provided by operating activities - continuing operations	288,514		193,741
Cash provided by (used in) operating activities - discontinued operations	5		(29)
Net Cash Provided by Operating Activities	288,519		193,712
Cash Flows from Investing Activities:
Additions to property and equipment	(368,754)		(228,379)
Proceeds from the sale of property and equipment	6,084		133
Cash used in investing activities - continuing operations	(362,670)		(228,246)
Cash provided by investing activities - discontinued operations	5,000		5,000
Net Cash Used in Investing Activities	(357,670)		(223,246)
Cash Flows from Financing Activities:
Net proceeds from issuances of common stock	2,102		1,829
Purchase of treasury shares	(3,319)		(1,775)
Payments of debt issuance costs			(3,481)
Cash used in financing activities - continuing operations	(1,217)		(3,427)
Cash provided by financing activities - discontinued operations
Net Cash Used in Financing Activities	(1,217)		(3,427)
Net Decrease in Cash and Cash Equivalents	(70,368)		(32,961)
Cash and Cash Equivalents at Beginning of Period	86,367		38,469
Cash and Cash Equivalents at End of Period	15,999		5,508
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	24,693		17,521
Cash paid during period for income taxes	$ 1,770		$ 168

[1] [2] Unaudited