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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | A summary of the other intangible assets that continue to be subject to amortization is as follows:
(Dollars in thousands) |  | As of June 30, 2019 |
|  | Gross carrying amount |  |  | Accumulated amortization |  |  | Net carrying amount |
Core deposit intangible assets |  | $ | 2,018 |  |  | $ | (1,626 | ) |  | $ | 392 |
Lease intangible asset |  |  | 350 |  |  |  | (256 | ) |  |  | 94 |
Mortgage servicing rights |  |  | 6,667 |  |  |  | (4,295 | ) |  |  | 2,372 |
Total other intangible assets |  | $ | 9,035 |  |  | $ | (6,177 | ) |  | $ | 2,858 |
(Dollars in thousands) |  | As of December 31, 2018 |
|  | Gross carrying amount |  |  | Accumulated amortization |  |  | Net carrying amount |
Core deposit intangible assets |  | $ | 2,067 |  |  | $ | (1,588 | ) |  | $ | 479 |
Lease intangible asset |  |  | 350 |  |  |  | (233 | ) |  |  | 117 |
Mortgage servicing rights |  |  | 6,545 |  |  |  | (4,050 | ) |  |  | 2,495 |
Total other intangible assets |  | $ | 8,962 |  |  | $ | (5,871 | ) |  | $ | 3,091 |
Schedule of Finite-lived Intangible Assets, Future Amortization Expense | The following sets forth estimated amortization expense for core deposit and lease intangible assets for the remainder of 2019 and in successive years ending December 31:
|  | Amortization |
(Dollars in thousands) |  | expense |
Remainder of 2019 |  | $ | 104 |
2020 |  |  | 177 |
2021 |  |  | 121 |
2022 |  |  | 58 |
2023 |  |  | 26 |
Total |  | $ | 486 |
Schedule of Participating Mortgage Loans | Mortgage loans serviced for others are not reported as assets. The following table provides information on the principal balances of mortgage loans serviced for others:
(Dollars in thousands) |  | June 30, 2019 |  |  | December 31, 2018 |
FHLMC |  | $ | 513,673 |  |  | $ | 521,489 |
FHLB |  |  | 20,744 |  |  |  | 10,603 |
Total |  | $ | 534,417 |  |  | $ | 532,092 |
Schedule of Servicing Asset at Amortized Cost | Activity for mortgage servicing rights and the related valuation allowance was as follows:
(Dollars in thousands) |  | Three months ended June 30, |  |  | Six months ended June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Mortgage servicing rights: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 2,384 |  |  | $ | 2,722 |  |  | $ | 2,495 |  |  | $ | 2,811 |
Additions |  |  | 225 |  |  |  | 137 |  |  |  | 322 |  |  |  | 259 |
Amortization |  |  | (237 | ) |  |  | (220 | ) |  |  | (445 | ) |  |  | (431 | )
Balance at end of period |  | $ | 2,372 |  |  | $ | 2,639 |  |  | $ | 2,372 |  |  | $ | 2,639 |

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