Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Company matching contribution to defined contribution plans, percentage of employee contribution	100.00%
Company's matching contribution as percentage of employee salary, maximum	4.00%
Company's matching contribution vesting percentage, per year	20.00%
Company's contribution to defined contribution benefit plans	$ 3.1	$ 3.7	$ 3.7