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Securities (Tables) | 9 Months Ended
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Sep. 30, 2018
Schedule Of Debt Securities [Line Items] |
Schedule of Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity | The amortized cost and estimated fair value of securities at September 30, 2018, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
|  | Available for Sale Securities |  |  | Held to Maturity Securities |
|  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |
(Dollars in thousands) |  | Cost |  |  | Value |  |  | Cost |  |  | Value |
Due in one year or less |  | $ | 87,890 |  |  | $ | 87,668 |  |  | $ | — |  |  | $ | — |
Due from one year to five years |  |  | 175,252 |  |  |  | 173,829 |  |  |  | — |  |  |  | — |
Due from five years to ten years |  |  | 38,428 |  |  |  | 37,827 |  |  |  | 3,052 |  |  |  | 3,282 |
Due after ten years |  |  | 10,589 |  |  |  | 10,403 |  |  |  | 5,351 |  |  |  | 4,812 |
|  |  | 312,159 |  |  |  | 309,727 |  |  |  | 8,403 |  |  |  | 8,094 |
Mortgage-backed securities, residential |  |  | 31,067 |  |  |  | 30,581 |  |  |  | — |  |  |  | — |
Asset backed securities |  |  | 10,803 |  |  |  | 10,805 |  |  |  | — |  |  |  | — |
SBA pooled securities |  |  | 4,952 |  |  |  | 4,868 |  |  |  | — |  |  |  | — |
|  | $ | 358,981 |  |  | $ | 355,981 |  |  | $ | 8,403 |  |  | $ | 8,094 |
Schedule of Proceeds from Sales of Debt Securities and the Associated Gross Gains and Losses | Proceeds from sales of debt securities and the associated gross gains and losses are as follows:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
(Dollars in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Proceeds |  | $ | 88,820 |  |  | $ | 2,936 |  |  | $ | 123,016 |  |  | $ | 2,936 |
Gross gains |  |  | — |  |  |  | 35 |  |  |  | 5 |  |  |  | 35 |
Gross losses |  |  | — |  |  |  | — |  |  |  | (277 | ) |  |  | — |
Schedule of Information Pertaining to Debt Securities with Gross Unrealized and Unrecognized Losses | Information pertaining to debt securities with gross unrealized and unrecognized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, are summarized as follows:
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
September 30, 2018 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Available for sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations |  | $ | 62,335 |  |  | $ | (685 | ) |  | $ | 32,439 |  |  | $ | (643 | ) |  | $ | 94,774 |  |  | $ | (1,328 | )
U.S. Treasury notes |  |  | 1,905 |  |  |  | (47 | ) |  |  | — |  |  |  | — |  |  |  | 1,905 |  |  |  | (47 | )
Mortgage-backed securities, residential |  |  | 12,554 |  |  |  | (349 | ) |  |  | 5,782 |  |  |  | (292 | ) |  |  | 18,336 |  |  |  | (641 | )
Asset backed securities |  |  | 110 |  |  |  | (2 | ) |  |  | 4,967 |  |  |  | (32 | ) |  |  | 5,077 |  |  |  | (34 | )
State and municipal |  |  | 100,141 |  |  |  | (804 | ) |  |  | 9,917 |  |  |  | (221 | ) |  |  | 110,058 |  |  |  | (1,025 | )
Corporate bonds |  |  | 45,583 |  |  |  | (144 | ) |  |  | 149 |  |  |  | (1 | ) |  |  | 45,732 |  |  |  | (145 | )
SBA pooled securities |  |  | 3,920 |  |  |  | (89 | ) |  |  | — |  |  |  | — |  |  |  | 3,920 |  |  |  | (89 | )
|  | $ | 226,548 |  |  | $ | (2,120 | ) |  | $ | 53,254 |  |  | $ | (1,189 | ) |  | $ | 279,802 |  |  | $ | (3,309 | )
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrecognized |  |  | Fair |  |  | Unrecognized |  |  | Fair |  |  | Unrecognized |
September 30, 2018 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Held to maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CLO securities |  | $ | — |  |  | $ | — |  |  | $ | 4,812 |  |  | $ | (539 | ) |  | $ | 4,812 |  |  | $ | (539 | )
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
December 31, 2017 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Government agency obligations |  | $ | 47,605 |  |  | $ | (166 | ) |  | $ | 40,053 |  |  | $ | (551 | ) |  | $ | 87,658 |  |  | $ | (717 | )
U.S. Treasury notes |  |  | 1,934 |  |  |  | (6 | ) |  |  | — |  |  |  | — |  |  |  | 1,934 |  |  |  | (6 | )
Mortgage-backed securities, residential |  |  | 10,349 |  |  |  | (21 | ) |  |  | 6,200 |  |  |  | (159 | ) |  |  | 16,549 |  |  |  | (180 | )
Asset backed securities |  |  | 4,898 |  |  |  | (85 | ) |  |  | — |  |  |  | — |  |  |  | 4,898 |  |  |  | (85 | )
State and municipal |  |  | 32,257 |  |  |  | (216 | ) |  |  | 12,138 |  |  |  | (227 | ) |  |  | 44,395 |  |  |  | (443 | )
Corporate bonds |  |  | 4,073 |  |  |  | (2 | ) |  |  | 149 |  |  |  | (1 | ) |  |  | 4,222 |  |  |  | (3 | )
SBA pooled securities |  |  | 1,654 |  |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | 1,654 |  |  |  | (2 | )
|  | $ | 102,770 |  |  | $ | (498 | ) |  | $ | 58,540 |  |  | $ | (938 | ) |  | $ | 161,310 |  |  | $ | (1,436 | )
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
(Dollars in thousands) |  | Fair |  |  | Unrecognized |  |  | Fair |  |  | Unrecognized |  |  | Fair |  |  | Unrecognized |
December 31, 2017 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Held to maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CLO securities |  | $ | 1,835 |  |  | $ | (28 | ) |  | $ | 5,692 |  |  | $ | (1,002 | ) |  | $ | 7,527 |  |  | $ | (1,030 | )
Debt Securities [Member] |
Schedule Of Debt Securities [Line Items] |
Schedule of Amortized Cost of Securities and Their Approximate Fair Values | Debt securities have been classified in the financial statements as available for sale or held to maturity. The amortized cost of debt securities and their approximate fair values are as follows:
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
September 30, 2018 |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Available for sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations |  | $ | 96,102 |  |  | $ | — |  |  | $ | (1,328 | ) |  | $ | 94,774 |
U.S. Treasury notes |  |  | 1,952 |  |  |  | — |  |  |  | (47 | ) |  |  | 1,905 |
Mortgage-backed securities, residential |  |  | 31,067 |  |  |  | 155 |  |  |  | (641 | ) |  |  | 30,581 |
Asset backed securities |  |  | 10,803 |  |  |  | 36 |  |  |  | (34 | ) |  |  | 10,805 |
State and municipal |  |  | 145,017 |  |  |  | 70 |  |  |  | (1,025 | ) |  |  | 144,062 |
Corporate bonds |  |  | 69,088 |  |  |  | 43 |  |  |  | (145 | ) |  |  | 68,986 |
SBA pooled securities |  |  | 4,952 |  |  |  | 5 |  |  |  | (89 | ) |  |  | 4,868 |
Total available for sale securities |  | $ | 358,981 |  |  | $ | 309 |  |  | $ | (3,309 | ) |  | $ | 355,981 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrecognized |  |  | Unrecognized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Held to maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CLO securities |  | $ | 8,403 |  |  | $ | 230 |  |  | $ | (539 | ) |  | $ | 8,094 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
(Dollars in thousands) |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
December 31, 2017 |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Available for sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency obligations |  | $ | 110,531 |  |  | $ | 76 |  |  | $ | (717 | ) |  | $ | 109,890 |
U.S. Treasury notes |  |  | 1,940 |  |  |  | — |  |  |  | (6 | ) |  |  | 1,934 |
Mortgage-backed securities, residential |  |  | 33,537 |  |  |  | 306 |  |  |  | (180 | ) |  |  | 33,663 |
Asset backed securities |  |  | 11,883 |  |  |  | 47 |  |  |  | (85 | ) |  |  | 11,845 |
State and municipal |  |  | 74,684 |  |  |  | 150 |  |  |  | (443 | ) |  |  | 74,391 |
Corporate bonds |  |  | 15,271 |  |  |  | 52 |  |  |  | (3 | ) |  |  | 15,320 |
SBA pooled securities |  |  | 3,535 |  |  |  | 27 |  |  |  | (2 | ) |  |  | 3,560 |
Total available for sale securities |  | $ | 251,381 |  |  | $ | 658 |  |  | $ | (1,436 | ) |  | $ | 250,603 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrecognized |  |  | Unrecognized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Held to maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CLO securities |  | $ | 8,557 |  |  | $ | — |  |  | $ | (1,030 | ) |  | $ | 7,527 |

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