Investments in Marketable Debt Securities, Available for Sale - Gross Realized Gains and Losses from Sale of Available for Sale Securities (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Investments, Debt and Equity Securities [Abstract] | ||||
| Gross realized gains | $ 68 | $ 97 | $ 78 | $ 229 |
| Gross realized losses | $ 0 | $ (34) | $ 0 | $ (49) |
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. No definition available.
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- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. No definition available.
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- References No definition available.
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