Retirement Plans (Details 2) (Recurring, USD $) In Thousands, unless otherwise specified	Mar. 02, 2013	Mar. 03, 2012
Significant Observable Inputs (Level 2)
Fair Value Measurements
Total assets at fair value	$ 114,773	$ 108,196
Significant Observable Inputs (Level 2) | International equity
Fair Value Measurements
Total assets at fair value	17,199	16,265
Significant Observable Inputs (Level 2) | Large Cap
Fair Value Measurements
Total assets at fair value	35,098	33,350
Significant Observable Inputs (Level 2) | Mid Cap
Fair Value Measurements
Total assets at fair value	12,562	11,765
Significant Observable Inputs (Level 2) | Small Cap
Fair Value Measurements
Total assets at fair value	4,236	3,733
Significant Observable Inputs (Level 2) | Long Term Credit Bond Index
Fair Value Measurements
Total assets at fair value	45,664	42,924
Significant Observable Inputs (Level 2) | Short Term Investments
Fair Value Measurements
Total assets at fair value	14	159
Fair value
Fair Value Measurements
Total assets at fair value	114,773	108,196
Fair value | International equity
Fair Value Measurements
Total assets at fair value	17,199	16,265
Fair value | Large Cap
Fair Value Measurements
Total assets at fair value	35,098	33,350
Fair value | Mid Cap
Fair Value Measurements
Total assets at fair value	12,562	11,765
Fair value | Small Cap
Fair Value Measurements
Total assets at fair value	4,236	3,733
Fair value | Long Term Credit Bond Index
Fair Value Measurements
Total assets at fair value	45,664	42,924
Fair value | Short Term Investments
Fair Value Measurements
Total assets at fair value	$ 14	$ 159