CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows from Operating Activities:
Net income	$ 63,774	$ 88,190
Amounts to reconcile net income to net cash flows provided by (used in) operating activities:
(Income) loss from discontinued operations, net of taxes	(36)	181
Income from unconsolidated companies		(10)
Impairment and other charges		1,908
Benefit for deferred income taxes	(2,261)	(76,884)
Depreciation and amortization	84,268	88,979
Amortization of deferred financing costs	4,532	4,057
Amortization of discount on convertible notes	8,735	10,544
Write-off of deferred financing costs		1,845
Loss on extinguishment of debt	2,148	4,181
Stock-based compensation expense	4,217	6,406
Changes in:
Trade receivables	(7,637)	2,597
Interest receivable	(144)	2,454
Income tax receivable	1,755	(7,113)
Accounts payable and accrued liabilities	(2,543)	(63,300)
Other assets and liabilities	607	171
Net cash flows provided by operating activities - continuing operations	157,415	64,206
Net cash flows provided by (used in) operating activities - discontinued operations	(201)	94
Net cash flows provided by operating activities	157,214	64,300
Cash Flows from Investing Activities:
Purchases of property and equipment	(50,728)	(23,584)
(Increase) decrease in restricted cash and cash equivalents	5,936	(12,347)
Other investing activities	8,011	1,967
Net cash flows used in investing activities - continuing operations	(36,781)	(33,964)
Net cash flows used in investing activities - discontinued operations
Net cash flows used in investing activities	(36,781)	(33,964)
Cash Flows from Financing Activities:
Net borrowings (repayments) under credit facility	416,500	(12,000)
Issuance of senior notes		350,000
Early redemption of senior notes		(152,180)
Repurchase and conversion of convertible notes	(126,542)	(99,222)
Repurchase of common stock warrants	(108,331)
Deferred financing costs paid	(8,428)	(15,516)
Repurchase of Company stock for retirement		(100,028)
Payment of dividend	(81,352)	(51,162)
Proceeds from exercise of stock option and purchase plans	6,119	5,206
Other financing activities, net	(445)	(514)
Net cash flows provided by (used in) financing activities - continuing operations	97,521	(75,416)
Net cash flows used in financing activities - discontinued operations
Net cash flows provided by (used in) financing activities	97,521	(75,416)
Net change in cash and cash equivalents	217,954	(45,080)
Cash and cash equivalents - unrestricted, beginning of period	61,579	97,170
Cash and cash equivalents - unrestricted, end of period	$ 279,533	$ 52,090