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]	Total
Balance beginning at Mar. 28, 2020	$ 33	$ 396	$ (108,729)	$ 229,774	$ (6,889)	$ 619,855	$ 734,440
Beginning balance, preferred shares at Mar. 28, 2020	22,000
Beginning balance, common shares at Mar. 28, 2020		39,645,000	6,360,000
Net income						2,987	2,987
Other comprehensive loss
Pension liability adjustment					(170)		(170)
Dividends declared
Preferred						(112)	(112)
Common						(7,323)	(7,323)
Dividend payable						(11)	(11)
Stock options and restricted stock				5			5
Stock options and restricted stock, shares		1,000
Stock-based compensation				904			904
Balance ending at Jun. 27, 2020	$ 33	$ 396	$ (108,729)	230,683	(7,059)	615,396	730,720
Ending balance, preferred shares at Jun. 27, 2020	22,000
Ending balance, common shares at Jun. 27, 2020		39,646,000	6,360,000
Balance beginning at Mar. 27, 2021	$ 29	$ 398	$ (108,729)	238,244	(4,619)	624,361	$ 749,684
Beginning balance, preferred shares at Mar. 27, 2021	20,000						19,664
Beginning balance, common shares at Mar. 27, 2021		39,848,000	6,360,000
Net income						15,681	$ 15,681
Other comprehensive loss
Pension liability adjustment					(103)		(103)
Dividends declared
Preferred						(110)	(110)
Common						(8,042)	(8,042)
Dividend payable						(14)	(14)
Stock options and restricted stock		$ 1		739			740
Stock options and restricted stock, shares		17,000
Stock-based compensation				755			755
Balance ending at Jun. 26, 2021	$ 29	$ 399	$ (108,729)	$ 239,738	$ (4,722)	$ 631,876	$ 758,591
Ending balance, preferred shares at Jun. 26, 2021	20,000						19,664
Ending balance, common shares at Jun. 26, 2021		39,865,000	6,360,000