Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 28,287	$ 15,438
Less: (Loss)/income from discontinued operations, net of tax	(75)	2,417
Less: Gain from sale of discontinued operations, net of tax	0	313
Net income from continuing operations	28,362	12,708
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	46,140	43,472
Amortization of debt issuance costs	1,376	1,440
Provision for bad debt and claim losses	2,847	3,758
Share-based compensation	8,677	12,167
Equity in (earnings)/losses of affiliates, net of taxes	(233)	723
Deferred income tax	6,250	8,911
Gain on investment and other, net	(161)	(935)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	12,745	10,952
Prepaid expenses and other current assets	(764)	4,952
Accounts payable and accrued expenses	4,987	(11,267)
Contract liabilities	(2,756)	15,447
Income taxes	(482)	(2,293)
Dividends received from investments in affiliates	776	0
Other assets and other liabilities	(7,537)	(4,357)
Net cash provided by operating activities - continuing operations	100,227	95,678
Net cash provided by/(used in) operating activities - discontinued operations	2	(25)
Total cash provided by operating activities	100,229	95,653
Cash flows from investing activities:
Purchases of property and equipment	(9,940)	(8,671)
Purchases of capitalized data and other intangible assets	(9,544)	(8,441)
Cash paid for acquisitions, net of cash acquired	(20,533)
Proceeds from sale of property and equipment	100	3
Proceeds from investments	980	0
Net cash used in investing activities - continuing operations	(38,937)	(17,109)
Net cash provided by investing activities - discontinued operations	0	0
Total cash used in investing activities	(38,937)	(17,109)
Cash flows from financing activities:
Proceeds from long-term debt	95	0
Repayment of long-term debt	(45,722)	(17,641)
Proceeds from issuance of shares in connection with share-based compensation	15,473	2,390
Payment of tax withholdings related to net share settlements	(10,532)	(12,262)
Shares repurchased and retired	(18,479)	(19,837)
Net cash used in financing activities - continuing operations	(59,165)	(47,350)
Net cash provided by financing activities - discontinued operations	0	0
Total cash used in financing activities	(59,165)	(47,350)
Effect of exchange rate on cash, cash equivalents and restricted cash	311	(814)
Net change in cash, cash equivalents and restricted cash	2,438	30,380
Cash, cash equivalents and restricted cash at beginning of period	129,869	89,974
Less: Change in cash, cash equivalents and restricted cash - discontinued operations	2	(25)
Plus: Cash swept from/(to) discontinued operations	2	(24)
Cash, cash equivalents and restricted cash at end of period	132,307	120,355
Supplemental disclosures of cash flow information:
Cash paid for interest	9,811	11,768
Cash paid for income taxes	988	1,526
Cash refunds from income taxes	2,917	304
Non-cash investing activities:
Capital expenditures included in accounts payable and other accrued expenses	$ 6,267	$ 4,842