Related Parties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Rent expense	$ 17.7
Director
Related Party Transaction [Line Items]
Rent expense	$ 3.6
Expenses from transactions with related party		$ 3.6	$ 3.8