Consolidated Businesses - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended		0 Months Ended			1 Months Ended	0 Months Ended
	Nov. 03, 2014	Dec. 31, 2014	Dec. 31, 2013	Aug. 08, 2014	Aug. 09, 2013	Dec. 27, 2012	Oct. 31, 2014	Dec. 17, 2014	Mar. 30, 2012	Dec. 26, 2012
Business Acquisition [Line Items]
Equity compensation arrangement			$ 600,000
FolioDynamix
Business Acquisition [Line Items]
Business acquisition, consideration transferred	205,824,000
Rolled stock options acquired	1,400,000
Business acquisition purchase price allocation, goodwill not deductible for tax purposes	1,600,000
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
Cash paid for acquisition	201,699,000
Revenue		30,000,000	19,800,000
Net income		1,500,000	(3,200,000)
Net income (loss) per share		$ 0.04	$ (0.90)
FolioDynamix | Scenario, Adjustment
Business Acquisition [Line Items]
Working capital adjustment	700,000
MSDSonline One
Business Acquisition [Line Items]
Cash paid for acquisition				10,300,000
Additional earnout paid				2,000,000
Fair value of earnout determined using monte carlo simulation				1,200,000
Percentage of business acquisition									96.00%
Bolt
Business Acquisition [Line Items]
Cash paid for acquisition			11,000,000		8,700,000		2,100,000
Additional equity ownership acquired						13,200,000
Equity method investment, ownership percentage						53.00%				38.00%
Gain on assets and liabilities acquired						25,500,000
Nu Civic
Business Acquisition [Line Items]
Business acquisition, consideration transferred								5,400,000
Cash paid for acquisition								2,000,000
Deferred liability Charges								600,000
Equity compensation arrangement								3,400,000
Percentage of equity								2.50%
GovDelivery
Business Acquisition [Line Items]
Cash paid for acquisition			$ 3,000,000