Condensed Consolidated Statements 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 [Member]	AOCI Attributable to Parent [Member]	Total
Balances at Mar. 31, 2021						$ 585,874	$ 663	$ 3,041	$ 98,502	$ (91,198)	$ (19,067)
Net earnings						14,136	0	0	0	0	0
Cash dividends declared on preferred stock						(12)	0	0	0	0	0
Equity incentive program						0	0	0	25	0	0
Purchase treasury stock						0	0	0	0	(4,552)	0
Net earnings						14,136	0	0	0	0	0
Balances at Jul. 03, 2021						599,998	663	3,041	98,527	(95,750)	(19,067)
Balances at Mar. 31, 2021						585,874	663	3,041	98,502	(91,198)	(19,067)
Net earnings						11,654	0	0	0	0	0
Equity incentive program						0	0	0	30	0	0
Purchase treasury stock						0	0	0	0	(12,757)	0
Preferred stock conversion						0	(1)	0	1	0	0
Net earnings						11,654	0	0	0	0	0
Balances at Oct. 02, 2021						611,652	662	3,041	98,558	(108,507)	(19,067)
Balances at Mar. 31, 2021						585,874	663	3,041	98,502	(91,198)	(19,067)
Net earnings												$ 44,454
Purchase treasury stock				$ (27,800)
Net earnings												44,454
Balances at Jan. 01, 2022						630,305	644	3,041	98,608	(118,977)	(19,067)	594,554
Balances at Oct. 02, 2021						611,652	662	3,041	98,558	(108,507)	(19,067)
Net earnings						18,664	0	0	0	0	0	18,664
Cash dividends declared on preferred stock						(11)	0	0	0	0	0
Equity incentive program						0	0	0	32	0	0
Purchase treasury stock						0	0	0	0	(10,470)	0
Preferred stock conversion						0	(18)	0	18	0	0
Net earnings						18,664	0	0	0	0	0	18,664
Balances at Jan. 01, 2022						630,305	644	3,041	98,608	(118,977)	(19,067)	594,554
Balances at Mar. 31, 2022						636,858	644	3,041	98,641	(128,879)	(26,468)	583,837
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
Net earnings						5,103	0	0	0	0	0
Balances at Jul. 02, 2022						641,949	644	3,042	98,750	(144,802)	(26,468)
Balances at Mar. 31, 2022						636,858	644	3,041	98,641	(128,879)	(26,468)	583,837
Net earnings												42,288
Purchase treasury stock				$ (41,200)
Net earnings												42,288
Balances at Dec. 31, 2022						679,123	607	3,043	98,862	(170,088)	(26,468)	585,079
Balances at Jul. 02, 2022						641,949	644	3,042	98,750	(144,802)	(26,468)
Net earnings						16,131	0	0	0	0	0
Equity incentive program						0	0	0	37	0	0
Purchase treasury stock						0	0	0	0	(21,069)	0
Preferred stock conversion						0	(32)	1	31	0	0
Net earnings						16,131	0	0	0	0	0
Balances at Oct. 01, 2022						658,080	612	3,043	98,818	(165,871)	(26,468)
Net earnings						21,054	0	0	0	0	0	21,054
Cash dividends declared on preferred stock						(11)	0	0	0	0	0
Equity incentive program						0	0	0	39	0	0
Purchase treasury stock						0	0	0	0	(4,217)	0
Preferred stock conversion						0	(5)	0	5	0	0
Net earnings						21,054	0	0	0	0	0	21,054
Balances at Dec. 31, 2022						$ 679,123	$ 607	$ 3,043	$ 98,862	$ (170,088)	$ (26,468)	$ 585,079
Preferred stock, shares authorized (in shares)	200,000	1,400,000	29,780
Common stock, shares authorized (in shares)				20,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	200,000	807,240	29,780
Common stock, shares outstanding (in shares)				5,867,759	1,707,241