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Marketable Debt Securities | 12 Months Ended
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Aug. 28, 2021
Marketable Debt Securities |
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 28, 2021
​ |  | Amortized |  | Gross |  | Gross |  | ​
​ | ​ | Cost | ​ | Unrealized | ​ | Unrealized | ​ | Fair
(in thousands) | ​ | Basis | ​ | Gains | ​ | Losses | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate debt securities | ​ | $ | 23,650 | ​ | $ | 329 | ​ | $ | (2) | ​ | $ | 23,977
Government bonds | ​ |  | 65,416 | ​ |  | 338 | ​ |  | (2) | ​ |  | 65,752
Mortgage-backed securities | ​ |  | 6,552 | ​ |  | 58 | ​ |  | (8) | ​ |  | 6,602
Asset-backed securities and other | ​ |  | 17,551 | ​ |  | 43 | ​ |  | (7) | ​ |  | 17,587
​ | ​ | $ | 113,169 | ​ | $ | 768 | ​ | $ | (19) | ​ | $ | 113,918
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | August 29, 2020
​ |  | Amortized |  | Gross |  | Gross |  | ​
​ | ​ | Cost | ​ | Unrealized | ​ | Unrealized | ​ | Fair
(in thousands) | ​ | Basis | ​ | Gains | ​ | Losses | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate debt securities | ​ | $ | 46,652 | ​ | $ | 970 | ​ | $ | (4) | ​ | $ | 47,618
Government bonds | ​ |  | 44,594 | ​ |  | 1,172 | ​ |  | — | ​ |  | 45,766
Mortgage-backed securities | ​ |  | 4,842 | ​ |  | 75 | ​ |  | — | ​ |  | 4,917
Asset-backed securities and other | ​ |  | 48,798 | ​ |  | 143 | ​ |  | (3) | ​ |  | 48,938
​ | ​ | $ | 144,886 | ​ | $ | 2,360 | ​ | $ | (7) | ​ | $ | 147,239
​ The marketable debt securities held at August 28, 2021, had effective maturities ranging from less than one year to approximately four years. The Company did not realize any material gains or losses on its marketable debt securities during fiscal 2021, 2020 or 2019. In evaluating whether a credit loss exists for the marketable debt securities, the Company considers factors such as the severity of the loss position, the credit worthiness of the investee, the term to maturity and the intent and ability to hold the investments until maturity or recovery of fair value. An allowance for credit losses was deemed unnecessary given consideration of the factors above. Included above in total marketable debt securities are $62.5 million and $30.1 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 28, 2021 and August 29, 2020, respectively.

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