Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Cumulative Preferred Stock [Member]	Cumulative Convertible Preferred Stock [Member]	Participating Convertible Preferred Stock [Member]	Common Class A [Member]	Common Class B [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	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
Net earnings	0	0	0	0	0	23,111						23,111
Balance at Mar. 31, 2023	351	3,049	99,152	(168,573)	(20,488)	641,259						554,750
Net earnings												47,890
Purchase treasury stock										$ (19,600)
Balance at Sep. 30, 2023	351	3,050	99,392	(188,217)	(20,488)	689,137						583,225
Net earnings												47,890
Balance at Jul. 01, 2023	351	3,049	99,304	(170,750)	(20,488)	664,358						575,824
Net earnings	0	0	0	0	0	24,779						24,779
Equity incentive program	0	1	88	0	0	0						89
Purchase treasury stock	0	0	0	(17,467)	0	0						(17,467)
Balance at Sep. 30, 2023	351	3,050	99,392	(188,217)	(20,488)	689,137						583,225
Net earnings	0	0	0	0	0	24,779						24,779
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	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
Net earnings	0	0	0	0	0	12,661						12,661
Balance at Mar. 31, 2024	351	3,050	100,425	(200,107)	(25,380)	704,554						582,893
Net earnings												25,964
Purchase treasury stock										$ (10,000)
Balance at Sep. 28, 2024	351	3,051	100,512	(210,098)	(25,380)	730,506						598,942
Net earnings												25,964
Balance at Jun. 29, 2024	351	3,050	100,469	(206,747)	(25,380)	717,203						588,946
Net earnings	0	0	0	0	0	13,303						13,303
Equity incentive program	0	1	43	0	0	0						44
Purchase treasury stock	0	0	0	(3,351)	0	0						(3,351)
Balance at Sep. 28, 2024	351	3,051	100,512	(210,098)	(25,380)	730,506						598,942
Net earnings	$ 0	$ 0	$ 0	$ 0	$ 0	$ 13,303						$ 13,303
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)										5,256,808	1,633,631