v3.22.4
Operating Segments Operating Segments - Additional Information (Details)
$ in Billions
12 Months Ended
Dec. 31, 2022
USD ($)
Segment
Dec. 31, 2021
USD ($)
Segment
Dec. 31, 2020
USD ($)
Segment
Segment Reporting Information [Line Items]      
Number of operating segments | Segment 2 2 2
Frost Wealth Advisors [Member]      
Segment Reporting Information [Line Items]      
Fair value of off-balance sheet managed and custody assets | $ $ 43.6 $ 43.3 $ 38.6