Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 67,902	$ 62,433
Less: Loss from discontinued operations, net of tax	(62)	(329)
Net income from continuing operations	67,964	62,762
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	82,935	73,250
Amortization of debt issuance costs	2,966	3,428
Provision for bad debt and claim losses	6,927	5,754
Share-based compensation	19,318	18,539
Excess tax benefit related to stock options	(1,816)	(5,641)
Equity in losses/(earnings) of affiliates, net of taxes	11	(8,434)
Gain on sale of property and equipment	(16)	0
Loss on early extinguishment of debt	0	1,589
Deferred income tax	9,048	(1,113)
(Gain)/loss on investments and other, net	(2,707)	1,047
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(20,473)	(52,792)
Prepaid expenses and other current assets	(18,126)	(1,561)
Accounts payable and accrued expenses	(21,620)	(16,582)
Deferred revenue	22,147	46,724
Income taxes	27,461	(3,355)
Dividends received from investments in affiliates	6,921	16,488
Other assets and other liabilities	(7,612)	(6,976)
Net cash provided by operating activities - continuing operations	173,328	133,127
Net cash used in operating activities - discontinued operations	(84)	(7,372)
Total cash provided by operating activities	173,244	125,755
Cash flows from investing activities:
Purchase of subsidiary shares from and other decreases in noncontrolling interests	(18,023)	0
Purchases of property and equipment	(27,858)	(21,496)
Purchases of capitalized data and other intangible assets	(17,927)	(18,707)
Cash paid for acquisitions, net of cash acquired	(396,816)
Purchases of investments	(615)	(2,516)
Proceeds from sale of property and equipment	16	0
Change in restricted cash	(83)	654
Net cash used in investing activities - continuing operations	(461,306)	(42,065)
Net cash provided by investing activities - discontinued operations	0	0
Total cash used in investing activities	(461,306)	(42,065)
Cash flows from financing activities:
Proceeds from long-term debt	390,000	14,375
Debt issuance costs	0	(6,452)
Repayment of long-term debt	(101,665)	(36,078)
Proceeds from issuance of shares in connection with share-based compensation	9,801	18,109
Tax withholdings related to net share settlements	(9,098)	(12,742)
Shares repurchased and retired	(29,126)	(58,720)
Excess tax benefit related to stock options	1,816	5,641
Net cash provided by/(used in) financing activities - continuing operations	261,728	(75,867)
Net cash provided by financing activities - discontinued operations	0	0
Total cash provided by/(used in) financing activities	261,728	(75,867)
Effect of exchange rate on cash	(389)	1,132
Net change in cash and cash equivalents	(26,723)	8,955
Cash and cash equivalents at beginning of period	99,090	104,677
Less: Change in cash and cash equivalents - discontinued operations	(84)	(7,372)
Plus: Cash swept to discontinued operations	(84)	(7,876)
Cash and cash equivalents at end of period	72,367	113,128
Supplemental disclosures of cash flow information:
Cash paid for interest	31,180	33,593
Cash paid for income taxes	3,438	23,659
Cash refunds from income taxes	415	2,816
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 3,775	$ 4,262