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Regulatory Capital (Tables)
9 Months Ended
Sep. 30, 2019
Banking and Thrift [Abstract]  
Schedule of compliance with regulatory capital requirements under banking regulations The Bank’s required and actual regulatory capital amounts and ratios under U.S. Basel III are shown in the following table.

 
 
Actual
 
U.S. Basel III
Regulatory Requirements(1)
 
 
Amount
Ratio
 
Amount
 
Ratio
As of September 30, 2019:
 
 
 
 
 
 
 
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
 
$
3,123,262

11.5
%
 
$
1,893,808

>
7.0
%
Tier 1 Capital (to Risk-Weighted Assets)
 
$
3,123,262

11.5
%
 
$
2,299,624

>
8.5
%
Total Capital (to Risk-Weighted Assets)
 
$
3,462,407

12.8
%
 
$
2,840,712

>
10.5
%
Tier 1 Capital (to Average Assets)
 
$
3,123,262

10.3
%
(2) 
$
1,209,790

>
4.0
%
 
 
 
 
 
 
 
 
As of December 31, 2018:
 
 
 
 
 
 
 
Common Equity Tier 1 Capital (to Risk-Weighted Assets)
 
$
2,896,091

12.1
%
 
$
1,528,209

>
6.375
%
Tier 1 Capital (to Risk-Weighted Assets)
 
$
2,896,091

12.1
%
 
$
1,887,787

>
7.875
%
Total Capital (to Risk-Weighted Assets)
 
$
3,196,279

13.3
%
 
$
2,367,226

>
9.875
%
Tier 1 Capital (to Average Assets)
 
$
2,896,091

11.1
%
 
$
1,039,226

>
4.0
%

________________             
(1) 
Required risk-based capital ratios include the capital conservation buffer.
(2) 
The Bank’s Tier 1 leverage ratio exceeds the 5 percent well-capitalized standard for the Tier 1 leverage ratio under the prompt corrective action framework.