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Goodwill and Other Intangible Assets - Change in Other Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Finite-lived Intangible Assets [Roll Forward]        
Balance at the beginning of the period $ 11,494 $ 14,807 $ 13,088 $ 16,613
Amortization (758) (860) (2,352) (2,666)
Balance at the end of the period $ 10,736 $ 13,947 $ 10,736 $ 13,947