Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Preferred Stock [Member]	Cumulative Convertible Preferred Stock [Member]	Participating Convertible Preferred Stock [Member]	Common Class A [Member]	Common Class B [Member]	Retained Earnings [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Total
Balances at Mar. 31, 2022						$ 632,051	$ 644	$ 3,041	$ 98,641	$ (128,879)	$ (26,468)
Net earnings						5,103	0	0	0	0	0	$ 5,103
Cash dividends declared on preferred stock						(12)	0	0	0	0	0
Issue stock for bonus program						0	0	1	76	0	0
Equity incentive program						0	0	0	33	0	0
Purchase treasury stock				$ (15,900)		0	0	0	0	(15,923)	0
Balances at Jul. 02, 2022						637,142	644	3,042	98,750	(144,802)	(26,468)	568,308
Balances at Mar. 31, 2023						641,259	351	3,049	99,152	(168,573)	(20,488)	554,750
Net earnings						23,111	0	0	0	0	0	23,111
Cash dividends declared on preferred stock						(12)	0	0	0	0	0
Issue stock for bonus program						0	0	0	72	0	0
Equity incentive program						0	0	0	80	0	0
Purchase treasury stock				$ (2,200)		0	0	0	0	(2,177)	0
Balances at Jul. 01, 2023						$ 664,358	$ 351	$ 3,049	$ 99,304	$ (170,750)	$ (20,488)	$ 575,824
Preferred stock, shares authorized (in shares)	200,000	1,400,000	8,292	20,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	200,000	807,240	8,292
Common stock, shares outstanding (in shares)				5,884,855	1,708,781