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v3.22.2.2

Regulatory Capital - Summary of the Bank's Compliance (Details) $ in Thousands | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
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Savings Bank [Member] |  |
Tier I (leverage) capital: |  |
Tier I (leverage) capital, capital level, amount | $ 859,779 | $ 840,105
Tier I (leverage) capital, capital level, percent | 0.1003 | 0.1039
Tier I (leverage) capital, requirement to be well capitalized, amount | $ 428,594 | $ 404,366
Tier I (leverage) capital, requirement to be well capitalized, percent | 0.0500 | 0.0500
Tier I (leverage) capital, excess, amount | $ 431,185 | $ 435,739
Tier I (leverage) capital, excess, percent | 0.0503 | 0.0539
Common Equity Tier I risk-based capital: |  |
Common Equity Tier I risk-based capital, capital level, amount | $ 859,779 | $ 840,105
Common Equity Tier I risk-based capital, capital level, percent | 0.1285 | 0.1358
Common Equity Tier I risk-based capital, requirement to be well capitalized, amount | $ 434,966 | $ 402,100
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 | $ 424,813 | $ 438,005
Common Equity Tier I risk-based capital, excess, percent | 0.0635% | 0.0708%
Tier I risk-based capital: |  |
Tier I risk-based capital, capital level, amount | $ 859,779 | $ 840,105
Tier I risk-based capital, capital level, percent | 0.1285 | 0.1358
Tier I risk-based capital, requirement to be well capitalized, amount | $ 535,343 | $ 494,892
Tier I risk-based capital, requirement to be well capitalized, percent | 0.0800 | 0.0800
Tier I risk-based capital, excess, amount | $ 324,436 | $ 345,213
Tier I risk-based capital, excess, percent | 0.0485 | 0.0558
Total risk-based capital: |  |
Total risk-based capital, capital level, amount | $ 899,274 | $ 874,400
Total risk-based capital, capital level, percent | 0.1344 | 0.1413
Total risk-based capital, requirement to be well capitalized, amount | $ 669,179 | $ 618,615
Total risk-based capital, requirement to be well capitalized, percent | 0.1000 | 0.1000
Total risk-based capital, excess, amount | $ 230,095 | $ 255,785
Total risk-based capital, excess, percent | 0.0344 | 0.0413
Holding Company |  |
Tier I (leverage) capital: |  |
Tier I (leverage) capital, capital level, amount | $ 749,526 | $ 726,174
Tier I (leverage) capital, capital level, percent | 0.0874 | 0.0898
Tier I (leverage) capital, requirement to be well capitalized, amount | $ 428,619 | $ 404,422
Tier I (leverage) capital, requirement to be well capitalized, percent | 0.0500 | 0.0500
Tier I (leverage) capital, excess, amount | $ 320,907 | $ 321,752
Tier I (leverage) capital, excess, percent | 0.0374 | 0.0398
Common Equity Tier I risk-based capital: |  |
Common Equity Tier I risk-based capital, capital level, amount | $ 701,532 | $ 671,494
Common Equity Tier I risk-based capital, capital level, percent | 0.1049 | 0.1086
Common Equity Tier I risk-based capital, requirement to be well capitalized, amount | $ 434,803 | $ 401,836
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 | $ 266,729 | $ 269,658
Common Equity Tier I risk-based capital, excess, percent | 0.0399% | 0.0436%
Tier I risk-based capital: |  |
Tier I risk-based capital, capital level, amount | $ 749,526 | $ 726,174
Tier I risk-based capital, capital level, percent | 0.1120 | 0.1175
Tier I risk-based capital, requirement to be well capitalized, amount | $ 535,143 | $ 494,568
Tier I risk-based capital, requirement to be well capitalized, percent | 0.0800 | 0.0800
Tier I risk-based capital, excess, amount | $ 214,383 | $ 231,606
Tier I risk-based capital, excess, percent | 0.0320 | 0.0375
Total risk-based capital: |  |
Total risk-based capital, capital level, amount | $ 979,021 | $ 885,469
Total risk-based capital, capital level, percent | 0.1464 | 0.1432
Total risk-based capital, requirement to be well capitalized, amount | $ 668,928 | $ 618,210
Total risk-based capital, requirement to be well capitalized, percent | 0.1000 | 0.1000
Total risk-based capital, excess, amount | $ 310,093 | $ 267,259
Total risk-based capital, excess, percent | 0.0464 | 0.0432

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