Commitments and Contingencies (Details) $ in Millions					1 Months Ended	6 Months Ended
	Oct. 08, 2019 item	Jun. 07, 2019 item	Apr. 02, 2019 item	Nov. 21, 2018 item	Apr. 30, 2019 item	Jun. 30, 2020 USD ($) item
Loss Contingencies [Line Items]
Letters of credit outstanding | $						$ 32.7
Remaining purchase obligation, remainder of year | $						$ 87.4
California Wage And Hour Class Action Litigation [Member]
Loss Contingencies [Line Items]
Period covered by claim						1 year
Stockholder Claims [Member]
Loss Contingencies [Line Items]
Number of claims					8
Number of officers				5
Number of underwriters				7
Tennessee State Court Cases [Member]
Loss Contingencies [Line Items]
Number of claims					5
Number of claims dismissed						2
Number of officers			5
Number of underwriters	7
Number of remaining claims						3
Federal Court Cases [Member]
Loss Contingencies [Line Items]
Number of claims					2
Number of claims dismissed						1
Number of remaining claims						2
New York State Court Case [Member]
Loss Contingencies [Line Items]
Number of claims					1
Stockholder Derivative Action Filed In Nevada [Member]
Loss Contingencies [Line Items]
Number of officers		5
Number of board members		5