Employee Benefits - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	44,100,000	$ 36,700,000	$ 29,800,000
Compensation expense related to deferred compensation plan	600,000	1,700,000	$ 400,000
Other assets	8,900,000	9,000,000.0
Other assets
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation plan assets	75,700,000	66,600,000
Other liabilities
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation liability	$ 79,600,000	$ 68,600,000