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Marketable Securities (Tables) | 12 Months Ended
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Feb. 28, 2015
Marketable Securities [Abstract] |
Amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale | The amortized cost, gross unrealized gains and losses, and estimated fair values of investments available for sale at February 28, 2015 and March 1, 2014, are as follows:
(In thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
February 28, 2015 |  |  |  |  |  |  |
Municipal bonds | $ | 10,973 |  |  | $ | 127 |  |  | $ | (118 | ) |  | $ | 10,982 |
Total investments | $ | 10,973 |  |  | $ | 127 |  |  | $ | (118 | ) |  | $ | 10,982 |
March 1, 2014 |  |  |  |  |  |  |
Municipal bonds | $ | 11,719 |  |  | $ | 94 |  |  | $ | (336 | ) |  | $ | 11,477 |
Total investments | $ | 11,719 |  |  | $ | 94 |  |  | $ | (336 | ) |  | $ | 11,477 |
Schedule of length of time that available-for-sale securities were in continuous unrealized loss positions | The following table presents the length of time that available-for-sale securities were in continuous unrealized loss positions, but were not deemed to be other than temporarily impaired, as of February 28, 2015:
| Less Than 12 Months |  | Greater Than or Equal to 12 Months |  | Total
(In thousands) | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Municipal bonds | $ | 2,229 |  |  | $ | (7 | ) |  | $ | 1,139 |  |  | $ | (111 | ) |  | $ | 3,368 |  |  | $ | (118 | )
Total investments | $ | 2,229 |  |  | $ | (7 | ) |  | $ | 1,139 |  |  | $ | (111 | ) |  | $ | 3,368 |  |  | $ | (118 | )
Schedule of amortized cost and estimated fair values of investments by contractual maturity | The amortized cost and estimated fair values of investments at February 28, 2015, 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 call or prepayment penalties.
(In thousands) | Amortized Cost |  | Estimated Market Value
Due within one year | $ | 322 |  |  | $ | 327 |
Due after one year through five years | 2,835 |  |  | 2,848 |
Due after five years through 10 years | 6,566 |  |  | 6,668 |
Due after 10 years through 15 years | 1,250 |  |  | 1,139 |
Total | $ | 10,973 |  |  | $ | 10,982 |

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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