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v3.23.2

Regulatory Capital - Summary of the Bank's Compliance (Details) $ in Thousands | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Savings Bank [Member] |  |
Tier I (leverage) capital: |  |
Tier I (leverage) capital, capital level, amount | $ 915,247 | $ 915,628
Tier I (leverage) capital, capital level, percent | 0.1067 | 0.1056
Tier I (leverage) capital, requirement to be well-capitalized, amount | $ 428,869 | $ 433,667
Tier I (leverage) capital, requirement to be well-capitalized, percent | 0.0500 | 0.0500
Tier I (leverage) capital, excess, amount | $ 486,378 | $ 481,961
Tier I (leverage) capital, excess, percent | 0.0567 | 0.0556
Common Equity Tier I risk-based capital: |  |
Common Equity Tier I risk-based capital, capital level, amount | $ 915,247 | $ 915,628
Common Equity Tier I risk-based capital, capital level, percent | 0.1376 | 0.1379
Common Equity Tier I risk-based capital, requirement to be well-capitalized, amount | $ 432,313 | $ 431,734
Common Equity Tier I risk-based capital, requirement to be well-capitalized, percent | 0.065% | 0.065%
Common Equity Tier I risk-based capital, excess, amount | $ 482,934 | $ 483,894
Common Equity Tier I risk-based capital, excess, percent | 0.0726% | 0.0729%
Tier I risk-based capital: |  |
Tier I risk-based capital, capital level, amount | $ 915,247 | $ 915,628
Tier I risk-based capital, capital level, percent | 0.1376 | 0.1379
Tier I risk-based capital, requirement to be well-capitalized, amount | $ 532,077 | $ 531,365
Tier I risk-based capital, requirement to be well-capitalized, percent | 0.0800 | 0.0800
Tier I risk-based capital, excess, amount | $ 383,170 | $ 384,263
Tier I risk-based capital, excess, percent | 0.0576 | 0.0579
Total risk-based capital: |  |
Total risk-based capital, capital level, amount | $ 953,277 | $ 954,457
Total risk-based capital, capital level, percent | 0.1433 | 0.1437
Total risk-based capital, requirement to be well-capitalized, amount | $ 665,097 | $ 664,206
Total risk-based capital, requirement to be well-capitalized, percent | 0.1000 | 0.1000
Total risk-based capital, excess, amount | $ 288,180 | $ 290,251
Total risk-based capital, excess, percent | 0.0433 | 0.0437
Holding Company |  |
Tier I (leverage) capital: |  |
Tier I (leverage) capital, capital level, amount | $ 735,810 | $ 746,880
Tier I (leverage) capital, capital level, percent | 0.0856 | 0.0861
Tier I (leverage) capital, requirement to be well-capitalized, amount | $ 429,905 | $ 433,607
Tier I (leverage) capital, requirement to be well-capitalized, percent | 0.0500 | 0.0500
Tier I (leverage) capital, excess, amount | $ 305,905 | $ 313,273
Tier I (leverage) capital, excess, percent | 0.0356 | 0.0361
Common Equity Tier I risk-based capital: |  |
Common Equity Tier I risk-based capital, capital level, amount | $ 689,876 | $ 698,258
Common Equity Tier I risk-based capital, capital level, percent | 0.1038 | 0.1052
Common Equity Tier I risk-based capital, requirement to be well-capitalized, amount | $ 432,201 | $ 431,635
Common Equity Tier I risk-based capital, requirement to be well-capitalized, percent | 0.065% | 0.065%
Common Equity Tier I risk-based capital, excess, amount | $ 257,675 | $ 266,623
Common Equity Tier I risk-based capital, excess, percent | 0.0388% | 0.0402%
Tier I risk-based capital: |  |
Tier I risk-based capital, capital level, amount | $ 735,810 | $ 746,880
Tier I risk-based capital, capital level, percent | 0.1107 | 0.1125
Tier I risk-based capital, requirement to be well-capitalized, amount | $ 531,940 | $ 531,243
Tier I risk-based capital, requirement to be well-capitalized, percent | 0.0800 | 0.0800
Tier I risk-based capital, excess, amount | $ 203,870 | $ 215,637
Tier I risk-based capital, excess, percent | 0.0307 | 0.0325
Total risk-based capital: |  |
Total risk-based capital, capital level, amount | $ 963,840 | $ 975,709
Total risk-based capital, capital level, percent | 0.1450 | 0.1469
Total risk-based capital, requirement to be well-capitalized, amount | $ 664,925 | $ 664,054
Total risk-based capital, requirement to be well-capitalized, percent | 0.1000 | 0.1000
Total risk-based capital, excess, amount | $ 298,915 | $ 311,655
Total risk-based capital, excess, percent | 0.0450 | 0.0469

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