Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Jun. 12, 2014 Subsequent Event [Member]	Mar. 31, 2014 Revenue [Member]	Mar. 31, 2013 Revenue [Member]	Mar. 31, 2012 Revenue [Member]	Mar. 31, 2014 Accounts Receivable [Member]	Mar. 31, 2013 Accounts Receivable [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of shares authorized to repurchase		830,460	1,410,812	923,876	87,647
Share price		$ 27,179,000	$ 30,727,000	$ 21,643,000	$ 4,100,000
Average price		$ 32.73	$ 21.78	$ 23.43	$ 47.05
Maturities of short term investment interest-bearing securities		90 days
Transfer of assets from Level 1 to Level 2 in the fair value hierarchy		0
Accounts receivable due period		30 days
Unbilled account receivables		11,922,000	5,221,000
Maximum customer risk percentage		100.00%	100.00%	100.00%		10.00%	10.00%	10.00%	10.00%	10.00%
Capitalized software development costs		19,360,000	18,276,000
Accumulated amortization of software development costs		53,734,000	47,178,000
Amortization period of computer software		5 years
Impairment of goodwill, intangible assets or other long-lived assets		0
Goodwill		36,814,000	36,814,000
Accumulated amortization of goodwill		2,069,000	2,069,000
Stock-based compensation expense		$ 2,140,000	$ 997,000	$ 2,276,000
Stock split ratio	2
Stock dividend percentage	100.00%
Stock dividend distribution date	Jun. 26, 2013
Stock dividend recording date	Jun. 12, 2013