Tax Benefits Preservation Plan (Details) $ / shares in Units, $ in Thousands	Jan. 03, 2018 USD ($) item $ / shares shares	Mar. 03, 2018 $ / shares	Mar. 04, 2017 $ / shares
Tax Benefits Preservation Plan
Declared Dividend distribution of number of Rights | item	1
Common stock, par value (in dollars per share)	$ 1.00	$ 1	$ 1
Number of Series J Junior Participating Preferred Stock can be purchased from each right | shares	0.001
Preferred stock, par value (in dollars per share)	$ 1.00
Purchase Price of Right (per unit)	$ 8.00
Shareholder's percentage of ownership	5.00%
Increase by this amount in aggregate ownership in the Company's overall shares outstanding would result in ownership change	50.00%
Tax Benefits Preservation Plan, Amount | $	$ 0