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Marketable Securities | 6 Months Ended
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Sep. 02, 2017
Marketable Securities [Abstract] |
Marketable Securities | Marketable Securities Marketable securities are classified as available for sale:
(In thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
September 2, 2017 |  |  |  |  |  |  |
Municipal bonds | 10,686 |  |  | 185 |  |  | (50 | ) |  | 10,821 |
March 4, 2017 |  |  |  |  |  |  |
Municipal bonds | 9,595 |  |  | 91 |  |  | (97 | ) |  | 9,589 |
We have a wholly-owned insurance subsidiary, Prism Assurance, Ltd. (Prism), which holds municipal bonds. Prism insures a portion of our general liability, workers’ compensation and automobile liability risks using reinsurance agreements to meet statutory requirements. The reinsurance carrier requires Prism to maintain fixed-maturity investments, which are generally high-quality municipal bonds, for the purpose of providing collateral for Prism’s obligations under the reinsurance agreement. As of September 2, 2017, marketable securities with a fair value of $1.2 million have been in a continuous unrealized loss position for more than 12 months with unrea lized losses of $0.1 million. We consider these unrealized losses to be temporary in nature. We intend to hold our investments until the full principal amount can be recovered, and we have the ability to do so based on other sources of liquidity. Gross realized gains and losses were not significant during the first six months of fiscal 2018 or fiscal 2017. The amortized cost and estimated fair values of municipal bonds at September 2, 2017, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities, as borrowers may have the right to call or prepay obligations with or without penalty.
(In thousands) | Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 463 |  |  | $ | 464 |
Due after one year through five years | 3,453 |  |  | 3,511 |
Due after five years through 10 years | 5,129 |  |  | 5,253 |
Due after 10 years through 15 years | 1,291 |  |  | 1,242 |
Due beyond 15 years | 350 |  |  | 351 |
Total | $ | 10,686 |  |  | $ | 10,821 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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