CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Accounts Receivable Allowances	$ 9,719	$ 11,428
Serial preferred shares without par value	$ 0	$ 0
Serial preferred shares authorized	3,000	3,000
Serial preferred shares issued	0	0
Serial preferred shares outstanding	0	0
Common shares without par value	$ 0	$ 0
Common shares authorized	300,000	300,000
Common shares issued	70,040	70,040
Common shares outstanding	58,082	57,733
Common shares held in treasury, shares	11,958	12,307