Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 617	$ 888
Common stock, no par value	$ 0	$ 0
Common stock, stated value	$ 0.3	$ 0.3
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	31,606,831	31,606,831
Common stock, shares outstanding	22,942,586	22,789,355
Treasury shares	8,664,245	8,817,477