CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Apr. 27, 2013	Apr. 28, 2012
Current assets
Receivables, allowance	$ 21,607	$ 22,254
Shareholders' equity
Preferred shares, authorized (in shares)	5,000	5,000
Preferred shares, issued (in shares)	0	0
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, authorized (in shares)	150,000	150,000
Common shares, outstanding (in shares)	52,392	52,244