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Marketable Debt Securities | 12 Months Ended
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Aug. 29, 2020
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 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
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | August 31, 2019
​ |  | Amortized |  | Gross |  | Gross |  | ​
​ | ​ | Cost | ​ | Unrealized | ​ | Unrealized | ​ | Fair
(in thousands) | ​ | Basis | ​ | Gains | ​ | Losses | ​ | 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
​ The marketable debt securities held at August 29, 2020, 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 2020, 2019 or 2018. Included above in total marketable debt securities are $30.1 million and $89.2 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 29, 2020 and August 31, 2019, 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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