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Investments - Maturities (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Adjusted Cost Basis
Due in one year or less	$ 319,137
Due after one year through five years	182,793
Due after five years through 10 years	0
Total	501,930
Estimated Fair Value
Due in one year or less	319,053
Due after one year through five years	182,631
Due after five years through 10 years	0
Total	$ 501,684

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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