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]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Mar. 31, 2023						$ 351	$ 3,049	$ 99,152	$ (168,573)	$ (20,488)	$ 641,259	$ 554,750
Net earnings						0	0	0	0	0	23,111	23,111
Cash dividends declared on preferred stock						0	0	0	0	0	(12)	(12)
Stock issued for profit sharing plan						0	0	72	0	0	0	72
Equity incentive program						0	0	80	0	0	0	80
Purchase treasury stock				$ (2,200)		0	0	0	(2,177)	0	0	(2,177)
Balance at Jul. 01, 2023						351	3,049	99,304	(170,750)	(20,488)	664,358	575,824
Balance at Mar. 31, 2024						351	3,050	100,425	(200,107)	(25,380)	704,554	582,893
Net earnings						0	0	0	0	0	12,661	12,661
Cash dividends declared on preferred stock						0	0	0	0	0	(12)	(12)
Stock issued for profit sharing plan						0	0	7	0	0	0	7
Equity incentive program						0	0	37	0	0	0	37
Purchase treasury stock				$ (6,600)		0	0	0	(6,640)	0	0	(6,640)
Balance at Jun. 29, 2024						$ 351	$ 3,050	$ 100,469	$ (206,747)	$ (25,380)	$ 717,203	$ 588,946
Preferred stock, shares authorized (in shares)	200,000	1,400,000	8,292
Common stock, shares authorized (in shares)				20,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	200,000	807,240	8,292
Common stock, shares outstanding (in shares)				5,292,367	1,650,319