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Employee benefit plans
12 Months Ended
Dec. 31, 2022
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]    
Employee benefit plans Stock-based compensation. Stock-based awards granted to qualified employees, non-employee directors and consultants are measured at fair value and recognized as an expense. The Company primarily issues restricted stock units and accounts for forfeitures as they occur. For service-based awards, stock-based compensation is recognized on a straight-line basis over the requisite service period. For performance and market-based awards which also require a service period, the Company uses graded vesting over the longer of the derived service period or when the performance or market condition is satisfied. 14,830