Employee Benefit Plans - Schedule of Defined Benefit Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, amount	$ 12.3	$ 12.9
Defined benefit plan assets, percentage	100.00%	100.00%
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, amount	$ 0.2	$ 0.2
Defined benefit plan assets, percentage	1.60%	1.30%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, amount	$ 5.1	$ 5.2
Defined benefit plan assets, percentage	41.50%	40.50%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, amount	$ 0.6	$ 0.7
Defined benefit plan assets, percentage	4.80%	5.60%
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, amount	$ 6.4	$ 6.8
Defined benefit plan assets, percentage	52.10%	52.60%