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Note 3 - Business Combination and Pending Acquisition - Monument Bancorp, Inc. - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 01, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash |  | $ 1,778,000 | $ 0 |
Goodwill, Ending Balance |  | 28,388,000 | $ 11,942,000 | $ 11,942,000
Monument Bancorp, Inc [Member] |  |  |  |
Cash | $ 9,698,000 |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | 32,953,000 |  |  |
Total consideration transferred | 42,651,000 |  |  |
Cash and cash equivalents | 7,920,000 |  |  |
Available-for-sale debt securities | 94,568,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable | 259,295,000 |  |  |
Accrued interest receivable | 1,593,000 |  |  |
Bank premises and equipment | 1,465,000 |  |  |
Foreclosed assets held for sale | 1,064,000 |  |  |
Deferred tax asset, net | 771,000 |  |  |
Core deposit intangible | 1,461,000 |  |  |
Goodwill, Ending Balance | 16,446,000 | $ 16,446,000 |  |
Other assets | 7,001,000 |  |  |
Deposits | (223,303,000) |  |  |
Short-term borrowings | (111,568,000) |  |  |
Subordinated debt | (12,375,000) |  |  |
Accrued interest and other liabilities | (1,687,000) |  |  |
Estimated excess fair value of assets acquired over liabilities assumed | $ 42,651,000 |  |  |

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