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 (loss)	$ 5,074	$ (56,350)
Amounts to reconcile net income (loss) to net cash flows provided by operating activities:
Income from discontinued operations, net of taxes	(61)	(3,325)
Income from unconsolidated companies	(1,086)	(117)
Loss on assets damaged in flood	0	42,733
Loss on disposals of long-lived assets	189	340
Provision for deferred income taxes	2,474	12,344
Depreciation and amortization	90,695	78,276
Amortization of deferred financing costs	3,896	3,977
Amortization of discount on convertible notes	9,389	8,642
Write-off of deferred financing costs related to refinancing of credit facility	1,681
Stock-based compensation expense	7,422	7,982
Net gain on extinguishment of debt	0	(1,299)
Changes in:
Trade receivables	(18,078)	(517)
Interest receivable	2,435	2,920
Income tax receivable	1,176	(11,094)
Accounts payable and accrued liabilities	(7,325)	10,479
Other assets and liabilities	(14,976)	(6,959)
Net cash flows provided by operating activities - continuing operations	82,905	88,032
Net cash flows provided by operating activities - discontinued operations	16	667
Net cash flows provided by operating activities	82,921	88,699
Cash Flows from Investing Activities:
Purchases of property and equipment	(93,844)	(109,933)
Collection of notes receivable	2,465	4,073
Other investing activities	2,202	130
Net cash flows used in investing activities - continuing operations	(89,177)	(105,730)
Net cash flows used in investing activities - discontinued operations	0	(1,460)
Net cash flows used in investing activities	(89,177)	(107,190)
Cash Flows from Financing Activities:
Net repayments under credit facility	(100,000)
Deferred financing costs paid	(10,074)
Repurchases of senior notes	0	(26,965)
Proceeds from exercise of stock option and purchase plans	4,275	2,297
Other financing activities, net	(221)	(924)
Net cash flows used in financing activities - continuing operations	(106,020)	(25,592)
Net cash flows provided by financing activities - discontinued operations	0	0
Net cash flows used in financing activities	(106,020)	(25,592)
Net change in cash and cash equivalents	(112,276)	(44,083)
Cash and cash equivalents - unrestricted, beginning of period	124,398	180,029
Cash and cash equivalents - unrestricted, end of period	$ 12,122	$ 135,946