Consolidated Statement Of Changes in Shareholders' Equity - 9 months ended Dec. 23, 2017 - 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. 25, 2017		$ 33	$ 390	$ (106,212)	$ 191,553	$ (3,161)	$ 498,651	$ 581,254
Beginning balance, preferred shares at Mar. 25, 2017		21,802						21,802
Beginning balance, common shares at Mar. 25, 2017			39,012,000	6,322,000
Net income							46,452	$ 46,452
Other comprehensive loss:
Pension liability adjustment ($241) pre-tax						(151)		(151)
Cash Dividends:
Preferred dividends	[1]						(276)	(276)
Common dividends	[1]						(17,690)	(17,690)
Dividends payable							(18)	(18)
Exercise of stock options			$ 1	$ (351)	3,385			3,035
Exercise of stock options, shares			112,000	8,000
Stock-based compensation					2,010			2,010
Balance ending at Dec. 23, 2017		$ 33	$ 391	$ (106,563)	$ 196,948	$ (3,312)	$ 527,119	$ 614,616
Ending balance, preferred shares at Dec. 23, 2017		21,802						21,802
Ending balance, common shares at Dec. 23, 2017			39,124,000	6,330,000

[1] Represents first, second and third quarter fiscal year 2018 dividends of $.18 per common share or common share equivalent each quarter, declared on May 18, 2017, August 15, 2017 and December 1, 2017, respectively.