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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill [Table Text Block] | A summary of the other intangible assets that continue to be subject to amortization is as follows:
(Dollars in thousands) |  | As of September 30, 2016 |
|  | Gross carrying |  | Accumulated |  | Valuation |  | Net carrying |
|  | amount |  | amortization |  | allowance |  | amount |
Core deposit intangible assets |  | $ | 2,067 |  | $ | (1,071) |  | $ | - |  | $ | 996 |
Lease intangible asset |  |  | 350 |  |  | (132) |  |  | - |  |  | 218 |
Mortgage servicing rights |  |  | 5,655 |  |  | (2,827) |  |  | - |  |  | 2,828 |
Total other intangible assets |  | $ | 8,072 |  | $ | (4,030) |  | $ | - |  | $ | 4,042 |
(Dollars in thousands) |  | As of December 31, 2015 |
|  | Gross carrying |  | Accumulated |  | Valuation |  | Net carrying |
|  | amount |  | amortization |  | allowance |  | amount |
Core deposit intangible assets |  | $ | 2,067 |  | $ | (855) |  | $ | - |  | $ | 1,212 |
Lease intangible asset |  |  | 350 |  |  | (98) |  |  | - |  |  | 252 |
Mortgage servicing rights |  |  | 5,322 |  |  | (2,482) |  |  | - |  |  | 2,840 |
Total other intangible assets |  | $ | 7,739 |  | $ | (3,435) |  | $ | - |  | $ | 4,304 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | The following sets forth estimated amortization expense for core deposit and lease intangible assets for the remainder of 2016 and in successive years ending December 31:
(Dollars in thousands) |  | Amortization |
|  | expense |
Remainder of 2016 |  | $ | 77 |
2017 |  |  | 289 |
2018 |  |  | 252 |
2019 |  |  | 214 |
2020 |  |  | 177 |
Thereafter |  |  | 205 |
Total |  | $ | 1,214 |
Schedule of Participating Mortgage Loans [Table Text Block] | The following table provides information on the principal balances of mortgage loans serviced for others:
(Dollars in thousands) |  | September 30, |  | December 31, |
|  | 2016 |  | 2015 |
FHLMC |  | $ | 473,896 |  | $ | 444,714 |
FHLB |  |  | 12,055 |  |  | 14,039 |
Servicing Asset at Amortized Cost [Table Text Block] | Activity for mortgage servicing rights and the related valuation allowance follows:
(Dollars in thousands) |  | Three months ended September 30, |  | Nine months ended September 30, |
|  | 2016 |  | 2015 |  | 2016 |  | 2015 |
Mortgage servicing rights: |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 2,851 |  | $ | 2,729 |  | $ | 2,840 |  | $ | 2,477 |
Additions |  |  | 268 |  |  | 328 |  |  | 780 |  |  | 1,038 |
Amortization |  |  | (291) |  |  | (233) |  |  | (792) |  |  | (691) |
Balance at end of period |  | $ | 2,828 |  | $ | 2,824 |  | $ | 2,828 |  | $ | 2,824 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Tabular disclosure of the terms and amounts of participation in loan arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=29639217&loc=d3e10013-112621 + Details
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- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746 + Details
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