Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Income and Comprehensive Income [Abstract]
Net Income	$ 3,383	$ 2,357	$ 5,362	$ 8,364
Foreign currency translation adjustments	4,559	2,433	5,915	(2,667)
Changes in unrealized gain (loss), net of taxes (benefits) of $134 and $(18) for the three and six months ended September 30, 2013 and net of taxes of $189 and $207 for the three and six months ended September 30, 2012	250	351	(36)	385
Reclassification adjustment for net losses (gains) realized in net income, net of taxes (benefits) of $0 and $(31) for the three and six months ended September 30, 2013 and net of taxes (benefits) of $0 and $17 for the three and six months ended September 30, 2012	0	0	(57)	31
Net change in market value of investments	250	351	(93)	416
Total comprehensive income	$ 8,192	$ 5,141	$ 11,184	$ 6,113