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v3.25.4

Condensed Balance Sheets - Parent Company Only (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Other assets | $ 23,900 | $ 36,389 |  |
Total assets | 4,142,244 | 4,014,991 |  |
LIABILITIES |  |  |  |
Accrued expenses and other liabilities | 31,383 | 36,891 |  |
Subordinated notes, net | 80,156 | 79,893 |  |
Long-term debt | 26,250 | 42,736 |  |
Total liabilities | 3,876,259 | 3,787,116 |  |
STOCKHOLDERS’ EQUITY |  |  |  |
Preferred stock | 0 | 0 |  |
Common stock | 3,000 | 3,000 |  |
Additional paid-in capital | 37,231 | 35,619 |  |
Retained earnings | 294,259 | 278,613 |  |
Accumulated other comprehensive income (loss) | (68,505) | (89,357) |  |
Total stockholders’ equity | 265,985 | 227,875 | $ 225,043 | $ 211,112
Total liabilities and stockholders’ equity | 4,142,244 | 4,014,991 |  |
Parent Company [Member] |  |  |  |
ASSETS |  |  |  |
Cash | 6,159 | 4,133 | $ 5,095 | $ 5,811
Investment in West Bank | 366,241 | 333,679 |  |
Investment in West Bancorporation Capital Trust I | 619 | 619 |  |
Other assets | 311 | 1,598 |  |
Total assets | 373,330 | 340,029 |  |
LIABILITIES |  |  |  |
Accrued expenses and other liabilities | 939 | 1,011 |  |
Subordinated notes, net | 80,156 | 79,893 |  |
Long-term debt | 26,250 | 31,250 |  |
Total liabilities | 107,345 | 112,154 |  |
STOCKHOLDERS’ EQUITY |  |  |  |
Preferred stock | 0 | 0 |  |
Common stock | 3,000 | 3,000 |  |
Additional paid-in capital | 37,231 | 35,619 |  |
Retained earnings | 294,259 | 278,613 |  |
Accumulated other comprehensive income (loss) | (68,505) | (89,357) |  |
Total stockholders’ equity | 265,985 | 227,875 |  |
Total liabilities and stockholders’ equity | $ 373,330 | $ 340,029 |  |

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- Definition Investment in wholly owned nonbank subsidiaries. + References No definition available. + Details
Name: | wtba_InvestmentInWhollyOwnedNonbankSubsidiaries
Namespace Prefix: | wtba_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |