CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Jan. 25, 2020	Apr. 27, 2019
Current assets
Receivables, allowance	$ 2,191	$ 2,180
Shareholders' equity
Preferred shares, authorized (in shares)	5,000,000	5,000,000
Preferred shares, issued (in shares)	0	0
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, authorized (in shares)	150,000,000	150,000,000
Common shares, outstanding (in shares)	46,075,000	46,955,000