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Employee Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net periodic benefit cost      
Service cost $ 7,977 $ 6,047 $ 5,195
Interest cost 92 193 345
Expected return on plan assets (60) (126) (241)
Amortization of prior service cost 217 216 214
Amortization of actuarial losses 1,154 667 247
Net periodic benefit cost $ 9,380 $ 6,997 $ 5,760
Location of costs excluding the service component Other income (expense), net Other income (expense), net Other income (expense), net