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Investments (Summary of Available-for-sale Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Apr. 12, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Maximum exposure to loss	$ 109,228		$ 122,593
Amortized Cost	15,000
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	15,000
Investment in corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Maximum exposure to loss	15,000
Amortized Cost	15,000
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	$ 15,000	$ 15,000