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Retirement Plan (Details) - Savings Plan - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
General and Administrative Expense      
Defined Benefit Plan Disclosure [Line Items]      
Cost recognized $ 1.6 $ 1.2 $ 1.4
Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Employer matching contribution 3.00%