Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 2026

Banking and Thrift, Other Disclosure [Abstract]

Schedule of Compliance with Regulatory Capital Requirements Under Banking Regulations

The Bank’s required and actual regulatory capital amounts and ratios, including applicable capital conservation buffers, under U.S. Basel III are shown in the following table. The following capital amounts and ratios are based upon the Bank’s average assets and risk-weighted assets, as indicated. The Bank has elected to exclude accumulated other comprehensive income related to both available-for-sale investments and swap valuations from Common Equity Tier 1 Capital.


(Dollars in thousands)	Actual				U.S. Basel III Minimum Requirements Plus Buffer(1)(2)
	Amount		Ratio		Amount			Ratio
As of September 30, 2026:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)	$	2,958,577	11.2	%	$	1,855,452	>	7.0	%
Tier 1 Capital (to Risk-Weighted Assets)	$	2,958,577	11.2	%	$	2,253,049	>	8.5	%
Total Capital (to Risk-Weighted Assets)	$	3,304,955	12.5	%	$	2,783,178	>	10.5	%
Tier 1 Capital (to Average Assets)	$	2,958,577	10.3	%	$	1,147,761	>	4.0	%

As of December 31, 2025:
Common Equity Tier 1 Capital (to Risk-Weighted Assets)	$	2,929,973	11.1	%	$	1,849,590	>	7.0	%
Tier 1 Capital (to Risk-Weighted Assets)	$	2,929,973	11.1	%	$	2,245,930	>	8.5	%
Total Capital (to Risk-Weighted Assets)	$	3,274,883	12.4	%	$	2,774,384	>	10.5	%
Tier 1 Capital (to Average Assets)	$	2,929,973	9.9	%	$	1,186,335	>	4.0	%

(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.