Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Income
Revenue	$ 86,474	$ 72,184	$ 243,226	$ 203,540
Costs of revenue	55,698	46,271	158,194	129,648
Gross profit	30,776	25,913	85,032	73,892
Operating expenses:
Selling, general and administrative expenses	21,634	19,335	61,593	57,060
Income from operations	9,142	6,578	23,439	16,832
Other income (expense):
Interest income	778	603	2,247	1,761
Foreign currency transaction gains (losses)	(194)	198	(244)	(64)
Other, net	(10)	(21)	54	(72)
Total other income	574	780	2,057	1,625
Income before income tax expense	9,716	7,358	25,496	18,457
Income tax expense	2,312	1,764	6,189	4,220
Net income	$ 7,404	$ 5,594	$ 19,307	$ 14,237
Net income per share of common stock:
Basic (in dollars per share)	$ 0.30	$ 0.23	$ 0.78	$ 0.58
Diluted (in dollars per share)	$ 0.29	$ 0.22	$ 0.76	$ 0.56