Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income/(loss)	$ 33,542	$ 16,537
Less: Loss from discontinued operations, net of tax	(656)	(8,967)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	0	(3,454)
Net income from continuing operations	34,198	28,958
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	34,814	29,491
Provision for bad debt and claim losses	5,275	6,498
Share-based compensation	8,142	4,354
Tax benefit related to stock options	(2,321)	(56)
Equity in earnings of affiliates, net of taxes	(8,787)	(9,470)
Loss on sale of property and equipment	8	(43)
Loss on early extinguishment of debt	0	326
Deferred income tax	3,342	3,113
(Loss)/gain on investment and other, net	(2,799)	(1,641)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(2,521)	(8,393)
Prepaid expenses and other current assets	5,043	1,945
Accounts payable and accrued expenses	(22,554)	(10,904)
Deferred revenue	15,684	(7,795)
Income taxes	29,346	19,487
Dividends received from investments in affiliates	11,236	19,020
Other assets and other liabilities	(15,035)	(5,164)
Net cash provided by operating activities - continuing operations	93,071	69,726
Net cash provided by operating activities - discontinued operations	(543)	(4,694)
Total cash provided by operating activities	92,528	65,032
Cash flows from investing activities:
Purchases of capitalized data and other intangible assets	(9,489)	(6,959)
Purchases of property and equipment	(18,150)	(13,519)
Cash paid for acquisitions, net of cash acquired	(7,027)
Purchases of investments	(2,351)	0
Proceeds from sale of subsidiary and other decreases in noncontrolling interest, net	800	0
Proceeds from sale of property and equipment	0	45
Change in restricted cash	(40)	(186)
Net cash used in investing activities - continuing operations	(36,257)	(20,619)
Net cash used in investing activities - discontinued operations	0	239
Total cash used in investing activities	(36,257)	(20,380)
Cash flows from financing activities:
Repayment of long-term debt	(4,400)	(52,247)
Proceeds from issuance of stock related to stock options and employee benefit plans	4,621	187
Minimum tax withholding paid on behalf of employees for restricted stock units	(6,436)	0
Shares repurchased and retired	(75,676)	0
Distribution to noncontrolling interests	0	(10)
Tax benefit related to stock options	2,321	56
Net cash used in financing activities - continuing operations	(79,570)	(52,014)
Net cash provided by financing activities - discontinued operations	0	1
Total cash used in financing activities	(79,570)	(52,013)
Net increase/(decrease) in cash and cash equivalents	(23,299)	(7,361)
Cash and cash equivalents at beginning of period		259,266
Less: Change in cash and cash equivalents - discontinued operations	(543)	(4,454)
Plus: Cash swept to discontinued operations	(543)	0
Cash and cash equivalents at end of period	125,559	256,359
Supplemental disclosures of cash flow information:
Cash paid for interest	2,800	4,776
Cash paid for income taxes	1,355	1,099
Cash refunds from income taxes	$ 13,756	$ 13,170