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Note 4 - Investment Securities (Tables) | 3 Months Ended
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Mar. 31, 2019
Notes Tables |
Schedule of Investment Securities Available-for-sale and Held-to-Maturity [Table Text Block] |
|  | Available-for-Sale |
|  | March 31 , 201 9 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 70,759 |  |  | $ | 173 |  |  | $ | (1,027 | ) |  | $ | 69,905 |
Commercial |  |  | 52,786 |  |  |  | 11 |  |  |  | (1,276 | ) |  |  | 51,521 |
Obligations of states and political subdivisions |  |  | 5,608 |  |  |  | 74 |  |  |  | (1 | ) |  |  | 5,681 |
U.S. Treasury securities |  |  | 79 |  |  |  | — |  |  |  | (1 | ) |  |  | 78 |
Total |  | $ | 129,232 |  |  | $ | 258 |  |  | $ | (2,305 | ) |  | $ | 127,185 |
|  | Held-to-Maturity |
|  | March 31, 2019 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 11,143 |  |  | $ | — |  |  | $ | (229 | ) |  | $ | 10,914 |
Obligations of U.S. government-sponsored agencies |  |  | 8,010 |  |  |  | — |  |  |  | (145 | ) |  |  | 7,865 |
Obligations of states and political subdivisions |  |  | 1,687 |  |  |  | 6 |  |  |  | (5 | ) |  |  | 1,688 |
Total |  | $ | 20,840 |  |  | $ | 6 |  |  | $ | (379 | ) |  | $ | 20,467 |
|  | Available-for-Sale |
|  | December 31, 2018 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 73,859 |  |  | $ | 113 |  |  | $ | (1,517 | ) |  | $ | 72,455 |
Commercial |  |  | 56,101 |  |  |  | 10 |  |  |  | (1,822 | ) |  |  | 54,289 |
Obligations of states and political subdivisions |  |  | 5,617 |  |  |  | 51 |  |  |  | (4 | ) |  |  | 5,664 |
U.S. Treasury securities |  |  | 79 |  |  |  | — |  |  |  | — |  |  |  | 79 |
Total |  | $ | 135,656 |  |  | $ | 174 |  |  | $ | (3,343 | ) |  | $ | 132,487 |
|  | Held-to-Maturity |
|  | December 31, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 11,716 |  |  | $ | — |  |  | $ | (349 | ) |  | $ | 11,367 |
Obligations of U.S. government-sponsored agencies |  |  | 8,026 |  |  |  | — |  |  |  | (244 | ) |  |  | 7,782 |
Obligations of states and political subdivisions |  |  | 1,720 |  |  |  | — |  |  |  | (17 | ) |  |  | 1,703 |
Total |  | $ | 21,462 |  |  | $ | — |  |  | $ | (610 | ) |  | $ | 20,852 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Available-for-Sale |  |  | Held-to-Maturity |
|  | Amortized Cost |  |  | Estimated Fair Value |  |  | Amortized Cost |  |  | Estimated Fair Value |
|  | (Dollars in Thousands) |
Maturing within one year |  | $ | 1,103 |  |  | $ | 1,104 |  |  | $ | 122 |  |  | $ | 122 |
Maturing after one to five years |  |  | 37,432 |  |  |  | 36,946 |  |  |  | 924 |  |  |  | 928 |
Maturing after five to ten years |  |  | 52,928 |  |  |  | 52,004 |  |  |  | 10,235 |  |  |  | 10,040 |
Maturing after ten years |  |  | 37,769 |  |  |  | 37,131 |  |  |  | 9,559 |  |  |  | 9,377 |
Total |  | $ | 129,232 |  |  | $ | 127,185 |  |  | $ | 20,840 |  |  | $ | 20,467 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | Available-for-Sale |
|  | March 31 , 201 9 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 139 |  |  | $ | — |  |  | $ | 52,754 |  |  | $ | (1,027 | )
Commercial |  |  | 3 |  |  |  | — |  |  |  | 50,743 |  |  |  | (1,276 | )
Obligations of states and political subdivisions |  |  | 125 |  |  |  | — |  |  |  | 418 |  |  |  | (1 | )
U.S. Treasury securities |  |  | 78 |  |  |  | (1 | ) |  |  | — |  |  |  | — |
Total |  | $ | 345 |  |  | $ | (1 | ) |  | $ | 103,915 |  |  | $ | (2,304 | )
|  | Held-to-Maturity |
|  | March 31 , 2019 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | — |  |  | $ | — |  |  | $ | 10,914 |  |  | $ | (229 | )
Obligations of U.S. government-sponsored agencies |  |  | — |  |  |  | — |  |  |  | 7,866 |  |  |  | (145 | )
Obligations of states and political subdivisions |  |  | — |  |  |  | — |  |  |  | 912 |  |  |  | (5 | )
Total |  | $ | — |  |  | $ | — |  |  | $ | 19,692 |  |  | $ | (379 | )
|  | Available-for-Sale |
|  | December 31, 201 8 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 9,417 |  |  | $ | (87 | ) |  | $ | 53,507 |  |  | $ | (1,430 | )
Commercial |  |  | 461 |  |  |  | (3 | ) |  |  | 53,430 |  |  |  | (1,819 | )
Obligations of states and political subdivisions |  |  | 879 |  |  |  | (2 | ) |  |  | 420 |  |  |  | (2 | )
U.S. Treasury securities |  |  | 79 |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 10,836 |  |  | $ | (92 | ) |  | $ | 107,357 |  |  | $ | (3,251 | )
|  | Held-to-Maturity |
|  | December 31, 2018 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | — |  |  | $ | — |  |  | $ | 11,367 |  |  | $ | (349 | )
Obligations of U.S. government-sponsored agencies |  |  | — |  |  |  | — |  |  |  | 7,782 |  |  |  | (244 | )
Obligations of states and political subdivisions |  |  | 770 |  |  |  | — |  |  |  | 933 |  |  |  | (17 | )
Total |  | $ | 770 |  |  | $ | — |  |  | $ | 20,082 |  |  | $ | (610 | )

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