Acquisitions - Additional Information (Detail) - USD ($)			3 Months Ended
	Sep. 29, 2015	Mar. 31, 2015	Apr. 30, 2016
Zinc Ahead Inc [Member]
Business Acquisition [Line Items]
Business acquisition date			Sep. 29, 2015
Closing cash consideration for purchase	$ 119,935,000
Business acquisition deferred consideration	$ 9,600,000
Business acquisition deferred consideration payment period	3 years
Deferred consideration annual payment rate	33.33%
Business acquisition-related transaction costs			$ 2,200,000
Qforma CrowdLink [Member]
Business Acquisition [Line Items]
Business acquisition date			Mar. 31, 2015
Closing cash consideration for purchase		$ 9,750,000
Business acquisition-related transaction costs			$ 400,000
Contingent cash payments			0
In-process research and development			$ 0
Maximum [Member]
Business Acquisition [Line Items]
Measurement Period For Goodwill Adjustment			1 year