Consolidated Statement 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. 29, 2014		$ 49	$ 376	$ (90,241)	$ 141,365	$ (3,135)	$ 367,570	$ 415,984
Beginning balance, preferred shares at Mar. 29, 2014		32,500
Beginning balance, common shares at Mar. 29, 2014			37,567,902	6,076,951
Net income							61,799	61,799
Other comprehensive income (loss):
Pension liability adjustment						(1,449)		(1,449)
Dividends:
Preferred dividends	[1]						(395)	(395)
Common dividends	[1]						(16,450)	(16,450)
Stock issuance costs					(14)			(14)
Tax benefit from exercise of stock options					2,208			2,208
Exercise of stock options	[2]		$ 4	$ (5,397)	14,057			$ 8,664
Exercise of stock options, shares			439,635	103,538				439,635
Stock-based compensation					3,264			$ 3,264
Balance ending at Mar. 28, 2015		$ 49	$ 380	$ (95,638)	160,880	(4,584)	412,524	473,611
Ending balance, preferred shares at Mar. 28, 2015		32,500
Ending balance, common shares at Mar. 28, 2015			38,007,537	6,180,489
Net income							66,805	66,805
Other comprehensive income (loss):
Pension liability adjustment						8		8
Dividends:
Preferred dividends	[1]						(456)	(456)
Common dividends	[1]						(19,231)	(19,231)
Tax benefit from exercise of stock options					6,677			6,677
Exercise of stock options	[2]		$ 6	$ (10,218)	16,243			$ 6,031
Exercise of stock options, shares			549,141	136,163				549,141
Stock-based compensation					2,750			$ 2,750
Balance ending at Mar. 26, 2016		$ 49	$ 386	$ (105,856)	186,550	(4,576)	459,642	$ 536,195
Ending balance, preferred shares at Mar. 26, 2016		32,500						32,500
Ending balance, common shares at Mar. 26, 2016			38,556,678	6,316,652
Net income							61,526	$ 61,526
Other comprehensive income (loss):
Pension liability adjustment						1,415		1,415
Dividends:
Preferred dividends	[1]						(447)	(447)
Common dividends	[1]						(22,070)	(22,070)
Conversion of Class C Preferred Stock		$ (16)	$ 2		14
Conversion of Class C Preferred Stock, shares		(10,698)	250,212
Tax benefit from exercise of stock options					3,510			3,510
Exercise of stock options			$ 2	$ (356)	(1,004)			$ (1,358)
Exercise of stock options, shares			205,299	5,765				485,660
Stock-based compensation					2,483			$ 2,483
Balance ending at Mar. 25, 2017		$ 33	$ 390	$ (106,212)	$ 191,553	$ (3,161)	$ 498,651	$ 581,254
Ending balance, preferred shares at Mar. 25, 2017		21,802						21,802
Ending balance, common shares at Mar. 25, 2017			39,012,189	6,322,417

[1] Dividends paid per common share or common share equivalent were $.68, $.60 and $.52, respectively, for the years ended March 25, 2017, March 26, 2016 and March 28, 2015.

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