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Marketable Debt Securities | 12 Months Ended
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Aug. 31, 2019
Investments, Debt and Equity Securities [Abstract] |
Marketable Debt Securities | Note F – Marketable Debt Securities The Company’s basis for determining the cost of a security sold is the “Specific Identification Model.” Unrealized gains (losses) on marketable debt securities are recorded in Accumulated Other Comprehensive Loss. The Company’s available-for-sale marketable debt securities consisted of the following:
|  |  | August 31, 2019 |
(in thousands ) |  |  | Amortized Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Corporate debt securities |  |  | $ | 36,998 |  |  | $ | 29 |  |  | $ | (19 | ) |  | $ | 37,008 |
Government bonds |  |  |  | 45,741 |  |  |  | 763 |  |  |  | — |  |  |  | 46,504 |
Mortgage-backed securities |  |  |  | 2,089 |  |  |  | 2 |  |  |  | (15 | ) |  |  | 2,076 |
Asset-backed securities and other |  |  |  | 53,345 |  |  |  | — |  |  |  | (7 | ) |  |  | 53,338 |
|  |  | $ | 138,173 |  |  | $ | 794 |  |  | $ | (41 | ) |  | $ | 138,926 |
|  | August 25, 2018 |
(in thousands ) |  | Amortized Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Corporate debt securities |  | $ | 50,306 |  |  | $ | — |  |  | $ | (684 | ) |  | $ | 49,622 |
Government bonds |  |  | 28,777 |  |  |  | — |  |  |  | (173 | ) |  |  | 28,604 |
Mortgage-backed securities |  |  | 3,248 |  |  |  | — |  |  |  | (90 | ) |  |  | 3,158 |
Asset-backed securities and other |  |  | 53,445 |  |  |  | — |  |  |  | (153 | ) |  |  | 53,292 |
|  | $ | 135,776 |  |  | $ | — |  |  | $ | (1,100 | ) |  | $ | 134,676 |
The marketable debt securities held at August 31, 2019, had effective maturities ranging from less than one year to approximately three years . The Company did not realize any material gains or losses on its marketable debt securities during fiscal 2019, 2018 or 2017. The Company holds 48 securities that are in an unrealized loss position of approximately $41 thousand at August 31, 2019. The Company has the intent and ability to hold these investments until recovery of fair value or maturity, and does not deem the investments to be impaired on an other than temporary basis. In evaluating whether the securities are deemed to be impaired on an other than temporary basis, the Company considers factors such as the duration and severity of the loss position, the credit worthiness of the investee, the term to maturity and its intent and ability to hold the investments until maturity or until recovery of fair value. Included above in total marketable debt securities are $89.2 million and $85.6 million of marketable debt securities transferred by the Company’s insurance captive to a trust account to secure its obligations to an insurance company related to future workers’ compensation and casualty losses as of August 31, 2019 and August 25, 2018, respectively.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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