Acquisition - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Feb. 28, 2014	Mar. 31, 2014	Mar. 31, 2013	Feb. 28, 2013 Xtrakter Limited [Member]	Mar. 31, 2013 Xtrakter Limited [Member]
Business Acquisition [Line Items]
Aggregate business acquisition purchase price	$ 37,827,000		$ 37,118,000	$ 37,800,000
Professional services					1,400,000
Revenue		63,398,000	53,651,000		1,900,000
Net income					$ 100,000