Defined Contribution Plan (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 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	$ 4,200,000	$ 4,100,000