Note M - Stockholders' Equity, Stock Plans and Other Employee Benefit Plans (Details Textual)								12 Months Ended						89 Months Ended	186 Months Ended
	Aug. 04, 2016 USD ($)	Jun. 01, 2016 USD ($)	Jun. 10, 2015 USD ($) $ / shares shares	Mar. 27, 2015 USD ($) $ / shares	Mar. 10, 2015 $ / shares	Jun. 04, 2013 USD ($) $ / shares shares	Nov. 01, 2012 USD ($) shares	Mar. 24, 2019 USD ($)	Mar. 25, 2018 USD ($)	Mar. 26, 2017 USD ($) $ / shares shares	Mar. 27, 2016 USD ($) $ / shares shares	Mar. 29, 2015 USD ($) $ / shares shares	Mar. 30, 2014 USD ($) $ / shares shares	Mar. 26, 2017 USD ($) $ / shares shares	Mar. 26, 2017 USD ($) $ / shares shares	Sep. 09, 2016 shares	Mar. 11, 2016 $ / shares shares	Feb. 01, 2016 shares	Nov. 13, 2015 $ / shares	Sep. 11, 2015 $ / shares shares	Jun. 05, 2013 $ / shares shares	Sep. 13, 2012 shares	Feb. 01, 2011 shares	Sep. 14, 2010 shares	Nov. 09, 2009 shares	May 31, 2007 USD ($)
Common Stock, Dividends, Per Share, Declared | $ / shares												$ 25
Minimum Percentage of Common Stock Acquired by a Person or Group which Triggers Exercise of New Rights																					15.00%
New Right Purchase Price | $ / shares																					$ 100
Common Stock, Capital Shares Reserved for Future Issuance | shares																					10,188,600
Treasury Stock, Shares, Acquired | shares										30,616					5,127,373
Treasury Stock, Value, Acquired, Cost Method | $										$ 1,272,000	$ 19,231,000	$ 1,916,000			$ 77,303,000
Common Stock, Par or Stated Value Per Share | $ / shares										$ 0.01	$ 0.01			$ 0.01	$ 0.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares												50,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares												$ 53.89
Share Based Compensation Arrangement by Share Based Payment Award Option Life												5 years
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | shares										260,258				260,258	260,258
Number of Times of Salary and Bonus Lump Sum Cash Payment										2.99				2.99	2.99
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent										20.00%
Defined Contribution Plan, Employer Matching Contribution Rate Per Dollar										0.25
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay										3.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount | $										$ 41,000	$ 35,000	$ 30,000
Multiemployer Plans, Plan Contributions | $										10,000	8,000	10,000
Payments of Ordinary Dividends, Common Stock | $										375,000	375,000	$ 115,110,000
Increased Number of Shares Available for Issuance Due to Plan Amendment | shares																						250,000
Amount of Available Common Shares Reduced by Each Share of Restricted Stock Granted | shares																						3.2
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period												4 years
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense | $										213,000	$ 298,000	$ 350,000
Share Based Compensation Total Unamortized Compensation Expense | $										$ 549,000				$ 549,000	$ 549,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | shares										48,285	15,147	235,125
Proceeds from Stock Options Exercised | $										$ 44,000	$ 89,000	$ 880,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $										$ 1,555,000	$ 486,000	13,040,000
Share Price | $ / shares				$ 73.56
Executive Chairman of the Board [Member]
Term of Consulting Period Pursuant to the Lorber Employment [Agreement]							0 years
President and Chief Operating Officer [Member]
Transition Agreement, Severance Payable | $			$ 289,000
Transition Agreement, Number of Shares of Common Stock Purchased | shares			56,933
Common Stock, Par or Stated Value Per Share | $ / shares			$ 0.01
Share Price | $ / shares			$ 40.28
Consulting Fee Per Month | $	$ 8,100		$ 16,300
Base Salary [Member] | Executive Chairman of the Board [Member]
Contractual Obligation | $							$ 600,000
Base Salary [Member] | Chief Executive Officer [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount | $		$ 500,000
Base Salary [Member] | One Employee [Member]
Contractual Obligation | $																										$ 136,000
Consulting Fee [Member] | Executive Chairman of the Board [Member]
Contractual Obligation | $							$ 200,000
Dutch Auction Tender Offer [Member]
Treasury Stock, Shares, Acquired | shares											88,672
Treasury Stock, Value, Acquired, Cost Method | $											$ 4,056,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | shares																				500,000
Sixth Stock Repurchase Plan [Member]
Treasury Stock, Shares, Acquired | shares														939,742
Treasury Stock, Value, Acquired, Cost Method | $														$ 29,641,000
Stock Repurchase Program Number of Additional Shares Authorized to be Repurchased | shares																	200,000	200,000					300,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | shares																	1,200,000								500,000
MSI Agreement [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | shares																100,000	175,000
Common Stock, Par or Stated Value Per Share | $ / shares																	$ 0.01
Minimum [Member] | Dutch Auction Tender Offer [Member]
Share Price | $ / shares																			$ 41	$ 33
Maximum [Member] | Dutch Auction Tender Offer [Member]
Share Price | $ / shares																			$ 44	$ 36
Newly Authorized Additional Shares Pursuant to 2010 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares																								150,000
Shares Expired or Forfeited up to 100000 Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares																								100,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares										223,698				223,698	223,698
Employee Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period										5 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period										3 years
Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period										10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period										5 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares													25,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares										190,218				190,218	190,218
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period													5 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $													$ 1,245,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition													5 years
Share Price | $ / shares													$ 49.80
Restricted Stock [Member] | Executive Chairman of the Board [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares							50,000
Restricted Stock [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares						25,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $						$ 1,245,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						5 years
Share Price | $ / shares						$ 49.80
Common Stock Purchase Rights [Member]
Common Stock, Capital Shares Reserved for Future Issuance | shares										7,396,439				7,396,439	7,396,439
Excluding Dividend [Member]
Share Price | $ / shares				48.56
Special Cash Dividend [Member]
Common Stock, Dividends, Per Share, Declared | $ / shares				$ 25	$ 25
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $										$ 736,000	$ 683,000	$ 965,000
Dividends Payable | $				$ 1,000,000
Payments of Ordinary Dividends, Common Stock | $				$ 115,100,000						$ 750,000
Special Cash Dividend [Member] | Scenario, Forecast [Member]
Payments of Ordinary Dividends, Common Stock | $								$ 125,000	$ 125,000