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Regulatory Capital (Tables)
3 Months Ended
Mar. 31, 2020
Banking and Thrift [Abstract]  
Schedule of compliance with regulatory capital requirements under banking regulations
 Actual
U.S. Basel III Minimum
Requirements Plus Buffer(1)(2)
AmountRatioAmountRatio
As of March 31, 2020:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)$3,112,763  12.4 %$1,757,168  >7.0 %
Tier 1 Capital (to Risk-Weighted Assets)$3,112,763  12.4 %$2,133,704  >8.5 %
Total Capital (to Risk-Weighted Assets)$3,428,154  13.7 %$2,635,752  >10.5 %
Tier 1 Capital (to Average Assets)$3,112,763  9.4 %

$1,326,107  >4.0 %
As of December 31, 2019:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)$3,264,309  12.2 %$1,876,050  >7.0 %
Tier 1 Capital (to Risk-Weighted Assets)$3,264,309  12.2 %$2,278,060  >8.5 %
Total Capital (to Risk-Weighted Assets)$3,600,668  13.4 %$2,814,074  >10.5 %
Tier 1 Capital (to Average Assets)$3,264,309  10.2 %$1,284,642  >4.0 %

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(1)  Reflects the U.S. Basel III minimum required ratio plus the applicable capital conservation buffer.
(2) The Bank’s regulatory capital ratios also exceeded all applicable standards for the Bank to qualify as “well capitalized” under the prompt corrective action framework.