Note 13 - Earnings Per Common Share from Continuing Operations - 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
	Dec. 26, 2020	Dec. 28, 2019	Dec. 26, 2020	Dec. 28, 2019
Net Earnings From Continuing Operations	$ 72,460	$ 24,428	$ 111,271	$ 30,166
Deduct preferred stock dividends paid	6	6	17	17
Undistributed earnings from continuing operations	72,454	24,422	111,254	30,149
Earnings from continuing operations attributable to participating preferred	285	100	437	122
Earnings from continuing operations attributable to common shareholders	$ 72,169	$ 24,322	$ 110,817	$ 30,027
Weighted average common shares outstanding-basic (in shares)	9,071	9,176	9,095	9,307
Basic earnings per common share from continuing operations (in dollars per share)	$ 7.96	$ 2.65	$ 12.18	$ 3.23
Earnings from continuing operations attributable to common shareholders	$ 72,169	$ 24,322	$ 110,817	$ 30,027
Add dividends on convertible preferred stock	5	5	15	15
Earnings from continuing operations attributable to common stock on a diluted basis	$ 72,174	$ 24,327	$ 110,832	$ 30,042
Weighted average common shares outstanding-basic (in shares)	9,071	9,176	9,095	9,307
Additional shares issued related to the equity compensation plan (in shares)	2	2	2	2
Additional shares to be issued under full conversion of preferred stock (in shares)	67	67	67	67
Total shares for diluted (in shares)	9,140	9,245	9,164	9,376
Diluted earnings per common share from continuing operations (in dollars per share)	$ 7.90	$ 2.63	$ 12.09	$ 3.20
Net Earnings From Discontinued Operations (Net of Tax)	$ 0	$ 955	$ 0	$ 955
Deduct preferred stock dividends paid	0	6	0	17
Undistributed earnings from discontinued operations	0	949	0	938
Earnings from discontinued operations attributable to participating preferred	0	4	0	4
Earnings from discontinued operations attributable to common shareholders	$ 0	$ 945	$ 0	$ 934
Basic earnings per common share from discontinued operations (in dollars per share)	$ 0	$ 0.10	$ 0	$ 0.10
Earnings from discontinued operations attributable to common shareholders	$ 0	$ 945	$ 0	$ 934
Add dividends on convertible preferred stock	0	5	0	15
Earnings from discontinued operations attributable to common stock on a diluted basis	$ 0	$ 950	$ 0	$ 949
Additional shares issued related to the equity compensation plan (in shares)		2		2
Additional shares to be issued under full conversion of preferred stock		$ 67		$ 67
Total shares for diluted (in shares)	0	9,245	0	9,376
Diluted earnings per common share from discontinued operations (in dollars per share)	$ 0	$ 0.10	$ 0	$ 0.10