Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 109,254	$ 87,453
Less: (Loss)/income from discontinued operations, net of tax	(175)	2,421
Less: Gain from sale of discontinued operations, net of tax	0	310
Net income from continuing operations	109,429	84,722
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	142,030	131,668
Amortization of debt issuance costs	4,103	4,263
Provision for bad debt and claim losses	11,113	12,268
Share-based compensation	29,574	29,558
Equity in (earnings)/losses of affiliates, net of taxes	(2,909)	1,232
Gain on sale of property and equipment	(19)	(227)
Deferred income tax	10,279	(7,038)
(Gain)/loss on investment and other, net	(5,124)	6,513
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	2,619	(5,655)
Prepaid expenses and other current assets	(7,617)	2,414
Accounts payable and other accrued expenses	(22,037)	(40,681)
Contract liabilities	(18,406)	26,037
Income taxes	7,847	644
Dividends received from investments in affiliates	775	1,198
Other assets and other liabilities	(9,353)	21,765
Net cash provided by operating activities - continuing operations	252,304	268,681
Net cash (used in)/provided by operating activities - discontinued operations	(4)	3,660
Total cash provided by operating activities	252,300	272,341
Cash flows from investing activities:
Purchases of property and equipment	(41,020)	(28,534)
Purchases of capitalized data and other intangible assets	(25,013)	(25,744)
Cash paid for acquisitions, net of cash acquired	(140,977)	(188,372)
Cash received from sale of business-line	3,245	0
Proceeds from sale of property and equipment	198	316
Proceeds from investments	980	0
Net cash used in investing activities - continuing operations	(202,587)	(242,334)
Net cash provided by investing activities - discontinued operations	0	0
Total cash used in investing activities	(202,587)	(242,334)
Cash flows from financing activities:
Proceeds from long-term debt	120,095	1,995,000
Debt issuance costs	0	(14,294)
Repayment of long-term debt	(114,626)	(1,796,661)
Proceeds from issuance of shares in connection with share-based compensation	19,585	6,330
Payment of tax withholdings related to net share settlements	(12,623)	(13,629)
Shares repurchased and retired	(87,028)	(132,460)
Net cash (used in)/provided by financing activities - continuing operations	(74,597)	44,286
Net cash provided by financing activities - discontinued operations	0	0
Total cash (used in)/provided by financing activities	(74,597)	44,286
Effect of exchange rate on cash, cash equivalents and restricted cash	2,039	(1,324)
Net change in cash, cash equivalents and restricted cash	(22,845)	72,969
Cash, cash equivalents and restricted cash at beginning of period	132,154	89,974
Less: Change in cash, cash equivalents and restricted cash - discontinued operations	(4)	3,660
Plus: Cash swept (to)/from discontinued operations	(4)	3,660
Cash, cash equivalents and restricted cash at end of period	109,309	162,943
Supplemental disclosures of cash flow information:
Cash paid for interest	50,108	37,283
Cash paid for income taxes	25,406	45,702
Cash refunds from income taxes	3,271	524
Non-cash investing activities:
Capital expenditures included in accounts payable and other accrued expenses	$ 16,911	$ 6,281