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
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						0	0	0	0	(15,923)	0
Balances at Jul. 02, 2022						637,142	644	3,042	98,750	(144,802)	(26,468)
Net earnings						5,103	0	0	0	0	0
Balances at Mar. 31, 2022						632,051	644	3,041	98,641	(128,879)	(26,468)
Net earnings												$ 21,234
Purchase treasury stock				$ (37,000)
Balances at Oct. 01, 2022						653,273	612	3,043	98,818	(165,871)	(26,468)	563,407
Net earnings												21,234
Balances at Jul. 02, 2022						637,142	644	3,042	98,750	(144,802)	(26,468)
Net earnings						16,131	0	0	0	0	0	16,131
Equity incentive program						0	0	0	37	0	0
Purchase treasury stock						0	0	0	0	(21,069)	0
Balances at Oct. 01, 2022						653,273	612	3,043	98,818	(165,871)	(26,468)	563,407
Net earnings						16,131	0	0	0	0	0	16,131
Preferred stock conversion						0	(32)	1	31	0	0
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
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						0	0	0	0	(2,177)	0
Balances at Jul. 01, 2023						664,358	351	3,049	99,304	(170,750)	(20,488)
Net earnings						23,111	0	0	0	0	0
Balances at Mar. 31, 2023						641,259	351	3,049	99,152	(168,573)	(20,488)	554,750
Net earnings												47,890
Purchase treasury stock				$ (19,600)								(188,200)
Balances at Sep. 30, 2023						689,137	351	3,050	99,392	(188,217)	(20,488)	583,225
Net earnings												47,890
Balances at Jul. 01, 2023						664,358	351	3,049	99,304	(170,750)	(20,488)
Net earnings						24,779	0	0	0	0	0	24,779
Equity incentive program						0	0	1	88	0	0
Purchase treasury stock						0	0	0	0	(17,467)	0
Balances at Sep. 30, 2023						689,137	351	3,050	99,392	(188,217)	(20,488)	583,225
Net earnings						$ 24,779	$ 0	$ 0	$ 0	$ 0	$ 0	$ 24,779
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)				5,555,666	1,699,753