XML 119 R104.htm IDEA: XBRL DOCUMENT v3.22.4
Minimum Regulatory Capital Requirements - Additional Information (Detail)
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2019
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]      
Minimum ratio of capital to risk-weighted assets 0.0800 0.0800 0.080
Minimum ratio of capital to risk-weighted assets including capital conservation buffer     10.50%
Minimum leverage ratio calculated as ratio of Tier 1 capital to average quarterly assets 0.0903 0.1025 0.040
Common Equity Tier 1 Capital [Member]      
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]      
Minimum ratio of capital to risk-weighted assets     0.045
Capital conservation buffer     2.50%
Minimum ratio of capital to risk-weighted assets including capital conservation buffer     7.00%
Tier 1 Capital [Member]      
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]      
Minimum ratio of capital to risk-weighted assets     0.060
Minimum ratio of capital to risk-weighted assets including capital conservation buffer     8.50%