Employee and Director Benefits (Detail) - NQDC Plan - Nonqualified Plan	6 Months Ended
	Jun. 30, 2023
Restricted Stock Units
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of salary	100.00%
2020 PSU Grants
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of salary	100.00%
Employee
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of salary	90.00%
Maximum percentage of cash bonus compensation	100.00%
Non Employee Director
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of salary	100.00%