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Employee Benefit Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Retirement Benefits [Abstract]        
Service cost $ 304 $ 287 $ 937 $ 856
Interest cost 256 297 776 875
Amortization of actuarial loss 1,197 2,273 3,649 7,325
Net periodic pension cost $ 1,757 $ 2,857 $ 5,362 $ 9,056
Actuarial losses as a percentage of defined benefit obligations     10.00%