Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Net income	$ 14,741	$ 23,740	$ 6,046
Foreign currency translation adjustments	2,938	(24,112)	7,553
Changes in market value of investments:
Changes in unrealized gains (losses), net of tax expenses (benefits) of $(231) in 2016, $(825) in 2015 and $196 in 2014	(362)	(1,536)	361
Reclassification adjustment for net losses (gains) realized in net income, net of tax benefits (expenses) of $182 in 2016, $655 in 2015 and $(52) in 2014	273	1,218	(96)
Net changes in market value of investments	(89)	(318)	265
Changes in accumulated net actuarial income (loss):
Changes in accumulated net actuarial income (loss), net of tax expenses (benefits) of $(634) in 2016, $(960) in 2015 and $8 in 2014	(71)	(3,830)	89
Reclassification adjustment for net losses realized in net income, net of tax benefits of $393 in 2016, $36 in 2015 and $21 in 2014	44	143	215
Net changes in defined benefit plan accumulated net actuarial income (loss)	(27)	(3,687)	304
Net current period other comprehensive income (loss)	2,822	(28,117)	8,122
Total comprehensive income (loss)	$ 17,563	$ (4,377)	$ 14,168