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Note C - Loans and Allowance for Loan Losses - Allowance for Loan Losses and the Recorded Investment of Loans Based on Impairment Method (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Individually evaluated for impairment | $ 807 | $ 98 |  |
Collectively evaluated for impairment | 5,465 | 6,630 |  |
Total ending allowance balance | 6,272 | 6,728 | $ 7,499 | $ 7,699
Loans individually evaluated for impairment | 17,135 | 12,618 |  |
Loans collectively evaluated for impairment | 755,639 | 764,434 |  |
Total ending loans balance | 772,774 | 777,052 |  |
Residential Portfolio Segment [Member] |  |  |  |
Individually evaluated for impairment |  |  |  |
Collectively evaluated for impairment | 1,250 | 1,583 |  |
Total ending allowance balance | 1,250 | 1,583 | 1,470 | 939
Loans individually evaluated for impairment | 438 | 1,667 |  |
Loans collectively evaluated for impairment | 309,815 | 302,412 |  |
Total ending loans balance | 310,253 | 304,079 |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Individually evaluated for impairment | 385 | 98 |  |
Collectively evaluated for impairment | 1,543 | 2,088 |  |
Total ending allowance balance | 1,928 | 2,186 | 2,978 | 4,315
Loans individually evaluated for impairment | 11,300 | 3,835 |  |
Loans collectively evaluated for impairment | 210,836 | 212,525 |  |
Total ending loans balance | 222,136 | 216,360 |  |
Commercial and Industrial Portfolio Segment [Member] |  |  |  |
Individually evaluated for impairment | 303 |  |  |
Collectively evaluated for impairment | 1,144 | 1,063 |  |
Total ending allowance balance | 1,447 | 1,063 | 1,024 | 907
Loans individually evaluated for impairment | 4,910 | 7,116 |  |
Loans collectively evaluated for impairment | 95,113 | 106,127 |  |
Total ending loans balance | 100,023 | 113,243 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Individually evaluated for impairment | 119 |  |  |
Collectively evaluated for impairment | 1,528 | 1,896 |  |
Total ending allowance balance | 1,647 | 1,896 | $ 2,027 | $ 1,538
Loans individually evaluated for impairment | 487 |  |  |
Loans collectively evaluated for impairment | 139,875 | 143,370 |  |
Total ending loans balance | $ 140,362 | $ 143,370 |  |

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