Business Combinations - Spend Radar - (Narrative) (Detail) (Spend Radar, USD $) In Thousands, unless otherwise specified	1 Months Ended			3 Months Ended
	Feb. 28, 2014	Apr. 30, 2013	Oct. 31, 2012	Mar. 31, 2013	Jan. 31, 2014	Apr. 29, 2013	Oct. 01, 2012
Business Acquisition [Line Items]
Cash			$ 8,000
Fair value of common stock, shares			113
Fair value of common stock			2,087
Cash potentially payable under earn-out arrangement							6,000
Common stock shares potentially issuable under earn-out arrangement							85
Earn-out compensation paid					3,600	2,400
Common stock shares issued under earn-out arrangement	51	34
Compensation expense recognized related to earn-out arrangement				1,200
Stock-based compensation expense related to earn-out arrangement				$ 313
Customer Relationships
Business Acquisition [Line Items]
Estimated useful life			5 years