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Note 2 - Business Combinations - Assets and Liabilities Acquired (Details) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
May 01, 2019 | Oct. 22, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 31, 2018
Cash Consideration |  |  | $ 467,000 | $ 10,043,000 |
Goodwill, Ending Balance |  |  | 16,477,000 | 202,000 |
Market Price of CBAN Common Stock on May 1, 2019 (in dollars per share) |  |  |  |  | $ 17.73
Cash Consideration Paid |  |  | $ 467,000 | $ 10,043,000 |
Planters First Bank, Albany Georgia Branch [Member] |  |  |  |  |
Cash Consideration |  | $ 10,238,000 |  |  |
Total purchase price for PFB branch acquisition |  | 10,238,000 |  |  |
Cash and cash equivalents |  | 195,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  | 20,430,000 |  |  |
Premises and equipment, net |  | 773,000 |  |  |
Core deposit intangible |  | 560,000 |  |  |
Other assets |  | 123,000 |  |  |
Total fair value of assets acquired |  | 22,081,000 |  |  |
Deposits |  | 12,032,000 |  |  |
Other liabilities |  | 13,000 |  |  |
Total fair value of liabilities assumed |  | 12,045,000 |  |  |
Net Assets acquired at fair value: |  | 10,036,000 |  |  |
Goodwill, Ending Balance |  | 202,000 |  |  |
Cash Consideration Paid |  | 10,238,000 |  |  |
Deposits |  | (12,032,000) |  |  |
Total Fair Value of Liabilities Assumed |  | (12,045,000) |  |  |
Total Consideration |  | 10,238,000 |  |  |
Net Assets Acquired at Fair Value: |  | $ 10,036,000 |  |  |
LBC Bancshares, Inc [Member] |  |  |  |  |
Cash Consideration | $ 15,315,000 |  |  |  |
Total purchase price for PFB branch acquisition | 34,021,000 |  |  |  |
Cash and cash equivalents | 15,678,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable | 130,568,000 |  |  |  |
Premises and equipment, net | 3,009,000 |  |  |  |
Core deposit intangible | 3,100,000 |  |  |  |
Total fair value of assets acquired | 210,158,000 |  |  |  |
Deposits | 189,896,000 |  |  |  |
Total fair value of liabilities assumed | 191,871,000 |  |  |  |
Net Assets acquired at fair value: | 18,287,000 |  |  |  |
Goodwill, Ending Balance | $ 15,734,000 |  |  |  |
Shares of CBAN Common Stock Issued to LBC Shareholders as of May 1, 2019 (in shares) | 1,053,875 |  |  |  |
Market Price of CBAN Common Stock on May 1, 2019 (in dollars per share) | $ 17.75 |  |  |  |
Estimated Fair Value of CBAN Common Stock Issued | $ 18,706,000 |  |  |  |
Cash Consideration Paid | 15,315,000 |  |  |  |
Investments Securities Available for Sale | 49,172,000 |  |  |  |
Investments Securities Held to Maturity | 1,766,000 |  |  |  |
Restricted Investments | 479,000 |  |  |  |
Other Real Owned | 243,000 |  |  |  |
Prepaid and Other Assets | 6,143,000 |  |  |  |
Deposits | (189,896,000) |  |  |  |
FHLB Advances | (1,000,000) |  |  |  |
Payables and Other Liabilities | (975,000) |  |  |  |
Total Fair Value of Liabilities Assumed | (191,871,000) |  |  |  |
Total Consideration | 34,021,000 |  |  |  |
Net Assets Acquired at Fair Value: | 18,287,000 |  |  |  |
PFB Mortgage [Member] |  |  |  |  |
Cash Consideration | 833,000 |  |  |  |
Total purchase price for PFB branch acquisition | 833,000 |  |  |  |
Premises and equipment, net | 78,000 |  |  |  |
Total fair value of assets acquired | 292,000 |  |  |  |
Total fair value of liabilities assumed |  |  |  |  |
Net Assets acquired at fair value: | 292,000 |  |  |  |
Goodwill, Ending Balance | 541,000 |  |  |  |
Cash Consideration Paid | 833,000 |  |  |  |
Total Fair Value of Liabilities Assumed |  |  |  |  |
Total Consideration | 833,000 |  |  |  |
Premium on Loan Commitments | 209,000 |  |  |  |
Other Assets | 5,000 |  |  |  |
Net Assets Acquired at Fair Value: | $ 292,000 |  |  |  |

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