Employee Benefits - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent	4.00%
Maximum annual contribution per employee, amount	$ 7,200
Defined contribution plan cost recognized	43,900,000	$ 44,100,000	$ 36,700,000
Compensation expense related to deferred compensation plan	1,900,000	600,000	$ 1,700,000
Other assets	10,000,000.0	8,900,000
Other assets
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation plan assets	88,500,000	75,700,000
Other liabilities
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation liability	$ 94,500,000	$ 79,600,000