Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 868	$ 786
Common stock, stated value	$ 0.30	$ 0.30
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	31,606,831	31,606,831
Common stock, shares outstanding	22,428,913	22,145,915
Treasury shares	9,177,918	9,460,916