Note 12 - Earnings Per Common Share - Earnings per Common Share from Continuing Operations and Discontinued Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2022	Dec. 26, 2020	Jan. 01, 2022	Dec. 26, 2020
Net earnings	$ 18,664	$ 72,460	$ 44,454	$ 111,271
Deduct preferred stock dividends paid	6	6	17	17
Undistributed net earnings	18,658	72,454	44,437	111,254
Earnings attributable to participating preferred	72	285	171	437
Earnings attributable to common shareholders	$ 18,586	$ 72,169	$ 44,266	$ 110,817
Weighted average common shares outstanding-basic (in shares)	8,603	9,071	8,813	9,095
Basic earnings per common share (in dollars per share)	$ 2.16	$ 7.96	$ 5.02	$ 12.18
Add dividends on convertible preferred stock	$ 5	$ 5	$ 15	$ 15
Earnings attributable to common stock on a diluted basis	$ 18,591	$ 72,174	$ 44,281	$ 110,832
Weighted average common shares outstanding-basic (in shares)	8,603	9,071	8,813	9,095
Additional shares issued related to the equity compensation plan (in shares)	4	2	4	2
Additional shares to be issued under full conversion of preferred stock (in shares)	67	67	67	67
Total shares for diluted (in shares)	8,674	9,140	8,884	9,164
Diluted earnings per common share: (in dollars per share)	$ 2.14	$ 7.90	$ 4.98	$ 12.09