Consolidated Statements Of Changes in Shareholders' Equity - USD ($) $ in Thousands		Class C Convertible Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance beginning at Mar. 31, 2018		$ 33	$ 392	$ (106,563)	$ 199,576	$ (4,248)		$ 539,286		$ 628,476
Beginning balance, preferred shares at Mar. 31, 2018		22,000
Beginning balance, common shares at Mar. 31, 2018			39,166,000	6,330,000
Net income								79,752		79,752
Other comprehensive loss
Pension liability adjustment						(288)				(288)
Dividends declared
Preferred								(408)		(408)
Common								(26,406)		(26,406)
Dividend payable								(50)		(50)
Stock options and restricted stock	[1]		$ 3	$ (2,166)	16,575					14,412
Stock options and restricted stock, shares	[1]		345,000	30,000
Stock-based compensation					4,022					4,022
Balance ending at Mar. 30, 2019		$ 33	$ 395	$ (108,729)	220,173	(4,536)	$ (582)	592,174	$ (582)	699,510
Ending balance, preferred shares at Mar. 30, 2019		22,000
Ending balance, common shares at Mar. 30, 2019			39,511,000	6,360,000
Net income								58,024		58,024
Other comprehensive loss
Pension liability adjustment						(2,353)				(2,353)
Dividends declared
Preferred								(449)		(449)
Common								(29,266)		(29,266)
Dividend payable								(46)		(46)
Stock options and restricted stock			$ 1		5,788					5,789
Stock options and restricted stock, shares			134,000
Stock-based compensation					3,813					3,813
Balance ending at Mar. 28, 2020		$ 33	$ 396	$ (108,729)	229,774	(6,889)		619,855		$ 734,440
Ending balance, preferred shares at Mar. 28, 2020		22,000								21,802
Ending balance, common shares at Mar. 28, 2020			39,645,000	6,360,000
Net income								34,319		$ 34,319
Other comprehensive loss
Pension liability adjustment						2,270				2,270
Dividends declared
Preferred								(438)		(438)
Common								(29,344)		(29,344)
Dividend payable								(31)		(31)
Conversion of Class C Preferred Stock		$ (4)	$ 1		3
Conversion of Class C Preferred Stock, shares		(2,000)	50,000
Stock options and restricted stock			$ 1		6,076					6,077
Stock options and restricted stock, shares			153,000
Stock-based compensation					2,391					2,391
Balance ending at Mar. 27, 2021		$ 29	$ 398	$ (108,729)	$ 238,244	$ (4,619)		$ 624,361		$ 749,684
Ending balance, preferred shares at Mar. 27, 2021		20,000								19,664
Ending balance, common shares at Mar. 27, 2021			39,848,000	6,360,000

[1] Includes the receipt of treasury stock in connection with the exercise of stock options and to partially satisfy tax withholding obligations.