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Employee Benefit Plans - Fair Value of Plan Assets Roll-Forward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 32,794 $ 31,281
Purchases, sales, and settlements (1,854) (1,867)
Change in fair value (209) 3,380
Balance at end of period $ 30,731 $ 32,794