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Investments - Summary of Cost and Fair Value of Deferred Compensation Plan Investments (Details) - Deferred Compensation Plan Investments - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Schedule Of Trading Securities And Other Trading Assets [Line Items]    
Cost $ 27,174 $ 21,205
Gross Unrealized Gains 4,266 1,725
Gross Unrealized (Losses) (628) (359)
Trading securities, at fair value $ 30,812 $ 22,571