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Employee Benefit Plans - Schedule of Net Periodic Pension Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Retirement Benefits [Abstract]      
Service cost $ 0 $ 0 $ 0
Interest cost on benefit obligation 1,426 1,640 1,641
Expected return on plan assets (1,924) (1,604) (1,948)
Curtailment and settlements 2,333 626 1,039
Amortization of actuarial losses 340 266 258
Net periodic benefit cost $ 2,175 $ 928 $ 990