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Marketable Securities (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Feb. 27, 2016 | Feb. 28, 2015 | Mar. 01, 2014
Schedule of Available-for-sale Securities [Line Items] |  |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate | 3.60% | 4.00% | 3.75%
Amortized Cost | $ 42,571 | $ 10,973 |
Estimated Fair Value | 42,692 | 10,982 |
Municipal bonds |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost, Due within one year | 50 |  |
Amortized Cost, Due after one year through five years | 3,853 |  |
Amortized Cost, Due after five years through 10 years | 7,198 |  |
Amortized Cost, Due after 10 years through 15 years | 1,292 |  |
Amortized Cost | 12,393 | 10,973 |
Estimated Market Value, Due within one year | 50 |  |
Estimated Market Value, Due after one year through five years | 3,903 |  |
Estimated Market Value, Due after five years through 10 years | 7,428 |  |
Estimated Market Value, Due after 10 years through 15 years | 1,188 |  |
Estimated Fair Value | $ 12,569 | $ 10,982 |

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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 + Details
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