| Employee Defined Benefit Retirement Plans | 6 Months Ended | 
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| Jun. 30, 2022 | |
| Retirement Benefits [Abstract] | |
| Employee Defined Benefit Retirement Plans | Employee Defined Benefit Retirement Plans Pension and Other Defined Benefit Retirement Obligations In connection with a 2020 acquisition, the Company assumed an obligation of $7.9 million associated with certain defined benefit retirement plans, including a pension plan. As of June 30, 2022 and December 31, 2021, the defined benefit obligation was $4.3 million and $4.5 million, respectively. The benefit is based on a formula applied to eligible employee earnings.  Net periodic benefit costs were $0.1 million and $0.1 million for the three months ended June 30, 2022 and 2021 and were recorded to research and development expenses in the consolidated statements of income.  Net periodic benefit costs were $0.2 million and $0.2 million for the six months ended June 30, 2022 and 2021 and were recorded to research and development expenses in the consolidated statements of income. | 
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- References No definition available. 
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- Definition The entire disclosure for retirement benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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