Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 125,069,000	$ 179,565,000
Adjustments to reconcile net income to net cash flows from operating activities:
Income from discontinued operations, net of income taxes	0	(30,989,000)
Depreciation	85,969,000	81,931,000
Amortization	59,768,000	58,984,000
Provision for share-based compensation	19,929,000	16,785,000
Deferred income tax benefit	(15,383,000)	(5,957,000)
Amortization of deferred financing costs	46,508,000	15,017,000
Increase in acquisition contingent consideration	854,000	0
(Gain) loss on sale of property and equipment	(12,630,000)	223,000
Changes in operating assets and liabilities
Accounts receivable	(8,083,000)	(29,029,000)
Other assets	15,815,000	(18,867,000)
Accounts payable	(19,070,000)	13,269,000
Accrued wages and benefits	(11,788,000)	3,204,000
Accrued interest	(18,242,000)	(13,689,000)
Other liabilities and income tax payable	32,886,000	12,774,000
Net cash flows from continuing operating activities	301,602,000	283,221,000
Net cash flows from discontinued operating activities	0	(8,197,000)
Total net cash flows from operating activities	301,602,000	275,024,000
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Business acquisitions	(9,745,000)	(17,296,000)
Purchases of property and equipment	(99,303,000)	(96,182,000)
Proceeds from the sale of property and equipment	38,518,000	0
Other	3,463,000	(304,000)
Net cash flows used in continuing investing activities	(67,067,000)	(113,782,000)
Net cash flows from discontinued investing activities	0	275,815,000
Total net cash flows used in investing activities	(67,067,000)	162,033,000
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Principal repayments on long-term obligations	(2,378,198,000)	(73,661,000)
Proceeds from issuance of notes	400,000,000	0
Payments on revolving credit facilities	(10,000,000)	(324,000,000)
Payment of deferred financing and other debt-related costs	(27,122,000)	(234,000)
Proceeds from stock options and ESPP shares including excess tax benefits	4,724,000	10,491,000
Dividends paid	(55,978,000)	(56,429,000)
Repurchase of common stock	(21,961,000)	(59,957,000)
Net cash flows used in continuing financing activities	(223,535,000)	(364,790,000)
Net cash flows from discontinued financing activities	0	0
Total net cash flows used in financing activities	(223,535,000)	(364,790,000)
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS	(2,021,000)	(4,790,000)
NET CHANGE IN CASH AND CASH EQUIVALENTS	8,979,000	67,477,000
CASH AND CASH EQUIVALENTS, Beginning of period	182,338,000	115,061,000
CASH AND CASH EQUIVALENTS, End of period	191,317,000	182,538,000
Term Loan Facility
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Proceeds from facilities	1,780,000,000	0
Revolving Credit Facility
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Proceeds from facilities	$ 85,000,000	$ 139,000,000