Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net income	$ 21,348	$ 14,741	$ 23,740
Foreign currency translation adjustments	(8,594)	2,938	(24,112)
Changes in market value of investments:
Changes in unrealized gains (losses), net of income taxes of $(82) in 2017, $(231) in 2016 and $(825) in 2015, respectively	(106)	(362)	(1,536)
Reclassification adjustment for net losses (gains) realized in net income, net of income taxes of $(19) in 2017, $182 in 2016 and $655 in 2015, respectively	(31)	273	1,218
Net change in market value of investments	(137)	(89)	(318)
Changes in accumulated net actuarial income (loss):
Changes in accumulated net actuarial income (loss), net of income taxes of $100 in 2017, $(634) in 2016 and $(960) in 2015, respectively	196	(71)	(3,830)
Reclassification adjustment for net losses (gains) realized in net income, net of income taxes of $131 in 2017, $393 in 2016 and $36 in 2015, respectively	256	44	143
Net changes in defined benefit plan accumulated net actuarial income (loss)	452	(27)	(3,687)
Other Comprehensive Income (Loss)	(8,279)	2,822	(28,117)
Total comprehensive income (loss)	$ 13,069	$ 17,563	$ (4,377)