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Regulatory Capital Requirements (Details)
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital $ 446,560,000 $ 429,208,000
Total capital to risk weighted assets ratio 0.1277 0.1211
Total capital required for capital adequacy $ 279,756,000 $ 283,628,000
Total capital required for capital adequacy to risk-weighted assets ratio 0.0800 0.0800
Total capital required for capital adequacy with capital conservation buffer $ 367,180,000 $ 372,261,000
Total capital required for capital adequacy with capital conservation buffer to risk-weighted assets ratio 10.50% 10.50%
Total capital required to be well-capitalized $ 349,695,000 $ 354,535,000
Total capital required to be well-capitalized to risk-weighted assets ratio 0.1000 0.1000
Tier one risk-based capital $ 354,490,000 $ 337,232,000
Tier one risk-based capital to risk-weighted assets ratio 0.1014 0.0951
Tier one risk-based capital required for capital adequacy $ 209,817,000 $ 212,721,000
Tier one risk-based capital required for capital adequacy to risk-weighted assets ratio 0.0600 0.0600
Tier one risk-based capital required for capital adequacy with capital conservation buffer $ 297,241,000 $ 301,354,000
Tier one risk-based capital required for capital adequacy with capital conservation buffer to risk-weighted assets ratio 8.50% 8.50%
Tier one risk-based capital required to be well-capitalized $ 279,756,000 $ 283,628,000
Tier one risk-based capital required to be well-capitalized to risk-weighted assets ratio 0.0800 0.0800
Common equity tier one risk-based capital $ 334,490,000 $ 317,232,000
Common equity tier one risk-based capital to risk-weighted assets ratio 0.0957 0.0895
Common equity tier one risk-based capital required for capital adequacy $ 157,363,000 $ 159,541,000
Common equity tier one risk-based capital required for capital adequacy to risk-weighted assets ratio 0.0450 0.0450
Common equity tier one risk-based capital required for capital adequacy with capital conservation buffer $ 244,786,000 $ 248,174,000
Common equity tier one risk-based capital required for capital adequacy with capital conservation buffer to risk-weighted assets ratio 7.00% 7.00%
Common equity tier one risk-based capital required to be well-capitalized $ 227,302,000 $ 230,447,000
Common equity tier one risk-based capital required to be well-capitalized to risk-weighted assets ratio 0.0650 0.0650
Tier one leverage capital $ 354,490,000 $ 337,232,000
Tier one leverage capital to average assets ratio 0.0844 0.0793
Tier one leverage capital required for capital adequacy $ 168,074,000 $ 170,113,000
Tier one leverage capital required for capital adequacy to average assets ratio 0.0400 0.0400
Tier one leverage capital required for capital adequacy with capital conservation buffer $ 168,074,000 $ 170,113,000
Tier one leverage capital required for capital adequacy with capital conservation buffer to average assets ratio 4.00% 4.00%
Tier one leverage capital required to be well-capitalized $ 210,092,000 $ 212,641,000
Tier one leverage capital required to be well-capitalized to average assets ratio 0.0500 0.0500
Tangible capital to tangible assets ratio 0.0642 0.0568
Intangible assets $ 0 $ 0
Preferred stock, shares outstanding | shares 0 0
West Bank [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital $ 466,888,000 $ 455,572,000
Total capital to risk weighted assets ratio 0.1335 0.1286
Total capital required for capital adequacy $ 279,703,000 $ 283,468,000
Total capital required for capital adequacy to risk-weighted assets ratio 0.0800 0.0800
Total capital required for capital adequacy with capital conservation buffer $ 367,110,000 $ 372,051,000
Total capital required for capital adequacy with capital conservation buffer to risk-weighted assets ratio 10.50% 10.50%
Total capital required to be well-capitalized $ 349,629,000 $ 354,335,000
Total capital required to be well-capitalized to risk-weighted assets ratio 0.1000 0.1000
Tier one risk-based capital $ 434,818,000 $ 423,596,000
Tier one risk-based capital to risk-weighted assets ratio 0.1244 0.1195
Tier one risk-based capital required for capital adequacy $ 209,777,000 $ 212,601,000
Tier one risk-based capital required for capital adequacy to risk-weighted assets ratio 0.0600 0.0600
Tier one risk-based capital required for capital adequacy with capital conservation buffer $ 297,184,000 $ 301,184,000
Tier one risk-based capital required for capital adequacy with capital conservation buffer to risk-weighted assets ratio 8.50% 8.50%
Tier one risk-based capital required to be well-capitalized $ 279,703,000 $ 283,468,000
Tier one risk-based capital required to be well-capitalized to risk-weighted assets ratio 0.0800 0.0800
Common equity tier one risk-based capital $ 434,818,000 $ 423,596,000
Common equity tier one risk-based capital to risk-weighted assets ratio 0.1244 0.1195
Common equity tier one risk-based capital required for capital adequacy $ 157,333,000 $ 159,451,000
Common equity tier one risk-based capital required for capital adequacy to risk-weighted assets ratio 0.0450 0.0450
Common equity tier one risk-based capital required for capital adequacy with capital conservation buffer $ 244,740,000 $ 248,034,000
Common equity tier one risk-based capital required for capital adequacy with capital conservation buffer to risk-weighted assets ratio 7.00% 7.00%
Common equity tier one risk-based capital required to be well-capitalized $ 227,259,000 $ 230,317,000
Common equity tier one risk-based capital required to be well-capitalized to risk-weighted assets ratio 0.0650 0.0650
Tier one leverage capital $ 434,818,000 $ 423,596,000
Tier one leverage capital to average assets ratio 0.1035 0.0997
Tier one leverage capital required for capital adequacy $ 168,053,000 $ 170,029,000
Tier one leverage capital required for capital adequacy to average assets ratio 0.0400 0.0400
Tier one leverage capital required for capital adequacy with capital conservation buffer $ 168,053,000 $ 170,029,000
Tier one leverage capital required for capital adequacy with capital conservation buffer to average assets ratio 4.00% 4.00%
Tier one leverage capital required to be well-capitalized $ 210,067,000 $ 212,537,000
Tier one leverage capital required to be well-capitalized to average assets ratio 0.0500 0.0500