Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 27,480	$ 29,387
Less: Loss from discontinued operations, net of tax	(58)	(111)
Net income from continuing operations	27,538	29,498
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	39,644	35,978
Amortization of debt issuance costs	1,485	1,466
Provision for bad debt and claim losses	2,895	2,612
Share-based compensation	9,543	8,732
Excess tax benefit related to stock options	(1,265)	(4,575)
Equity in earnings of affiliates, net of taxes	90	(3,766)
Gain on sale of property and equipment	(8)	0
Deferred income tax	5,143	1,978
Loss/(gain) on investments and other, net	251	(309)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(4,767)	(12,070)
Prepaid expenses and other current assets	(1,332)	(3,662)
Accounts payable and accrued expenses	(15,992)	(19,570)
Deferred revenue	8,491	4,264
Income taxes	9,736	(2,359)
Dividends received from investments in affiliates	5,183	8,420
Other assets and other liabilities	65	(5,393)
Net cash provided by operating activities - continuing operations	86,700	41,244
Net cash used in operating activities - discontinued operations	27	(1,010)
Total cash provided by operating activities	86,727	40,234
Cash flows from investing activities:
Purchase of subsidiary shares from and other decreases in noncontrolling interests	(18,023)	0
Purchases of property and equipment	(9,810)	(11,397)
Purchases of capitalized data and other intangible assets	(9,021)	(11,244)
Purchases of investments	(440)	(388)
Proceeds from sale of property and equipment	8	0
Change in restricted cash	(117)	146
Net cash used in investing activities - continuing operations	(37,403)	(22,883)
Net cash provided by investing activities - discontinued operations	0	0
Total cash used in investing activities	(37,403)	(22,883)
Cash flows from financing activities:
Proceeds from long-term debt	0	135
Repayment of long-term debt	(15,830)	(35,551)
Proceeds from issuance of shares in connection with share-based compensation	6,296	10,701
Tax withholdings related to net share settlements	(7,178)	(11,792)
Excess tax benefit related to stock options	1,265	4,575
Net cash used in financing activities - continuing operations	(15,447)	(31,932)
Net cash provided by financing activities - discontinued operations	0	0
Total cash provided by/(used in) financing activities	(15,447)	(31,932)
Effect of exchange rate on cash	137	67
Net change in cash and cash equivalents	34,014	(14,514)
Cash and cash equivalents at beginning of period	99,090	104,677
Less: Change in cash and cash equivalents - discontinued operations	27	(1,010)
Plus: Cash swept from/(to) discontinued operations	27	(1,467)
Cash and cash equivalents at end of period	133,104	89,706
Supplemental disclosures of cash flow information:
Cash paid for interest	6,272	9,834
Cash paid for income taxes	992	8,947
Cash refunds from income taxes	275	2,147
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 8,584	$ 3,402