Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 253,364	$ 111,353
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	84,002	85,301
Expenses associated with debt refinancing transactions	36,528	1,996
Asset impairments	3,622
Amortization of debt issuance costs and other non-cash interest	2,740	3,280
Deferred income taxes	(146,881)	3,585
Income tax benefit of equity compensation	(40)	(2,291)
Non-cash equity compensation	9,695	9,116
Other expenses and non-cash items	1,608	662
Changes in assets and liabilities, net:
Accounts receivable, prepaid expenses and other assets	33,634	28,916
Accounts payable, accrued expenses and other liabilities	4,430	(20,161)
Income taxes payable	902	1,294
Net cash provided by operating activities	283,604	223,051
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for facility development and expansions	(18,292)	(25,427)
Acquisition of businesses, net of cash acquired	(36,249)
Expenditures for other capital improvements	(27,482)	(35,738)
Proceeds from sale of assets	443	496
Increase in other assets	(2,367)	(2,787)
Payments received on direct financing lease and notes receivable	1,379	1,156
Net cash used in investing activities	(82,568)	(62,300)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of debt	1,183,000	808,500
Principal repayments of debt	(1,118,000)	(923,500)
Payment of debt issuance and other refinancing and related costs	(37,242)	(6,328)
Income tax benefit of equity compensation	40	2,291
Purchase and retirement of common stock	(5,454)	(2,481)
Proceeds from exercise of stock options	28,538	4,015
Increase in restricted cash	(810)
Dividends paid	(243,782)	(39,838)
Net cash used in financing activities	(193,710)	(157,341)
NET INCREASE IN CASH AND CASH EQUIVALENTS	7,326	3,410
CASH AND CASH EQUIVALENTS, beginning of period	62,897	55,832
CASH AND CASH EQUIVALENTS, end of period	70,223	59,242
Cash paid during the period for:
Interest (net of amounts capitalized of $504 and $837 in 2013 and 2012, respectively)	22,312	44,978
Income taxes	$ 6,066	$ 59,645