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Employee Benefit Plans (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disclosure Text Block Supplement [Abstract]        
Total contributions $ 1.8 $ 1.1 $ 3.1 $ 2.0