Consolidated Businesses - Additional Information (Detail) (USD $)	0 Months Ended
	Nov. 03, 2014	Aug. 08, 2014	Oct. 01, 2014	Dec. 17, 2014	Mar. 31, 2015
FolioDynamix
Business Acquisition [Line Items]
Business acquisition, consideration transferred	$ 205,824,000
Rolled stock options acquired	4,100,000
Business acquisition purchase price allocation, goodwill not deductible for tax purposes	166,200,000
Business acquisition, transaction costs	1,400,000
Deferred revenue, reduced amount	(6,000,000)
Business combination, revenue contributed	3,800,000
Business combination, net income contributed	1,100,000
Purchase price allocation assets acquired	205,824,000
Cash paid for acquisition	201,699,000
FolioDynamix | Scenario, Adjustment
Business Acquisition [Line Items]
Working capital adjustment	700,000
MSDSonline One
Business Acquisition [Line Items]
Purchase price allocation assets acquired		11,500,000
MSDSonline One | Maximum
Business Acquisition [Line Items]
Contingent earn-out payment		2,000,000
Bolt
Business Acquisition [Line Items]
Cash paid for acquisition			2,100,000
NuCivic
Business Acquisition [Line Items]
Business acquisition, consideration transferred				5,100,000
Purchase price allocation assets acquired					2,000,000
Cash paid for acquisition				2,000,000
Deferred liability Charges				600,000
Business acquisition, stock issued				$ 3,100,000