XML 158 R115.htm IDEA: XBRL DOCUMENT v3.24.3
Shareholders' Equity - Regulatory Capital Requirements (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Sep. 30, 2023
The Company    
Common Equity Tier 1 risk-based capital ratio:    
Actual capital $ 2,153,721 $ 1,769,170
Actual ratio 11.31% 10.37%
Capital adequacy guidelines ratio 4.50% 4.50%
Tier 1 risk-based capital ratio:    
Actual capital $ 2,453,721 $ 2,069,170
Actual ratio 0.1288 0.1212
Capital adequacy guidelines ratio 0.0600 0.0600
Total risk-based capital ratio:    
Actual capital $ 2,722,290 $ 2,270,877
Actual ratio 0.1429 0.1331
Capital adequacy guidelines ratio 0.0800 0.0800
Tier 1 leverage ratio:    
Actual capital $ 2,453,721 $ 2,069,170
Actual ratio 0.0890 0.0939
Capital adequacy guidelines ratio 0.0400 0.0400
The Bank    
Common Equity Tier 1 risk-based capital ratio:    
Actual capital $ 2,463,266 $ 1,982,943
Actual ratio 12.94% 11.63%
Capital adequacy guidelines ratio 4.50% 4.50%
Categorized as well capitalized under prompt corrective action provisions ratio 6.50% 6.50%
Tier 1 risk-based capital ratio:    
Actual capital $ 2,463,266 $ 1,982,943
Actual ratio 0.1294 0.1163
Capital adequacy guidelines ratio 0.0600 0.0600
Categorized as well capitalized under prompt corrective action provisions ratio 0.0800 0.0800
Total risk-based capital ratio:    
Actual capital $ 2,681,116 $ 2,184,650
Actual ratio 0.1408 0.1281
Capital adequacy guidelines ratio 0.0800 0.0800
Categorized as well capitalized under prompt corrective action provisions ratio 0.1000 0.1000
Tier 1 leverage ratio:    
Actual capital $ 2,463,266 $ 1,982,943
Actual ratio 0.0894 0.0910
Capital adequacy guidelines ratio 0.0400 0.0400
Categorized as well capitalized under prompt corrective action provisions ratio 0.0500 0.0500