Employee Benefit Arrangements (Details) $ in Millions |
12 Months Ended | |||
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Dec. 31, 2021
USD ($)
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Dec. 31, 2020
USD ($)
retirement_plan
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Dec. 31, 2019
USD ($)
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Jan. 01, 2021
retirement_plan
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Defined Contribution Plan Disclosure [Line Items] | ||||
Number of 401(k) retirement savings plans | retirement_plan | 2 | 1 | ||
Match of every dollar contributed (as a percent) | 50.00% | |||
Employee's eligible compensation (as a percent) | 6.00% | |||
Contribution expense | $ 4.4 | $ 3.6 | $ 3.4 | |
Service Expense | ||||
Defined Contribution Plan Disclosure [Line Items] | ||||
Contribution expense | 2.0 | 1.7 | 1.6 | |
Selling, General and Administrative Expenses | ||||
Defined Contribution Plan Disclosure [Line Items] | ||||
Contribution expense | $ 2.4 | $ 1.9 | $ 1.8 |