Defined Contribution Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contribution per employee, percent			6.00%
401(k) Defined Contribution Retirement Plan
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution per one dollar of employee contribution			$ 1.00
Contributions made by the employer	$ 0.0	$ 3,900,000	$ 4,200,000	$ 11,900,000