Retirement Plans - Fair Value (Details) - Recurring - USD ($) $ in Thousands	Feb. 29, 2020	Mar. 02, 2019
Retirement Plans
Total assets at fair value	$ 132,129	$ 124,832
International equity
Retirement Plans
Total assets at fair value	15,251	15,396
Large Cap
Retirement Plans
Total assets at fair value	33,174	34,058
Small-Mid Cap
Retirement Plans
Total assets at fair value	14,223	14,534
Long Term Credit Bond Index
Retirement Plans
Total assets at fair value	25,129	44,103
Long Term US Government Bonds
Retirement Plans
Total assets at fair value	18,897	8,383
20+ Year Treasury STRIPS
Retirement Plans
Total assets at fair value	1,447	847
Intermediate Fixed Income
Retirement Plans
Total assets at fair value	14,606	5,920
AGT High Yield Bond [Member]
Retirement Plans
Total assets at fair value	7,673
Short Term Investments
Retirement Plans
Total assets at fair value	1,729	$ 1,591
Level 2
Retirement Plans
Total assets at fair value	1,729
Level 2 | Short Term Investments
Retirement Plans
Total assets at fair value	$ 1,729