Revenues and Income from Operations Related to Segment Within Reconciliation to Consolidated Amounts (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenue	$ 354,476	$ 345,389	$ 1,040,746	$ 1,036,970
Gross Profit	153,348	131,456	426,762	409,630
Income (loss) from operations	8,869	(18,840)	8,765	(39,844)
Unallocated Amounts [Member]
Segment Reporting Information [Line Items]
Revenue	3,225	2,680	13,075	9,387
Gross Profit	(14,291)	(15,808)	(39,757)	(46,777)
Income (loss) from operations	(89,391)	(94,824)	(245,364)	(269,160)
Clinical and Financial Solutions [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	277,151	270,752	805,731	815,303
Gross Profit	117,850	100,285	321,032	312,773
Income (loss) from operations	60,811	49,031	159,292	151,883
Population Health [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenue	74,100	71,957	221,940	212,280
Gross Profit	49,789	46,979	145,487	143,634
Income (loss) from operations	$ 37,449	$ 26,953	$ 94,837	$ 77,433

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1,2)

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+ References

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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