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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The change in goodwill during the year is as follows (dollars in thousands):
| 2015 |  | 2014
Beginning of year | $ | 145,909 |  | $ | 16,804
Acquired goodwill |  | - |  |  | 129,105
Impairment |  | - |  |  | -
End of year | $ | 145,909 |  | $ | 145,909
Intangible Assets Disclosure [Text Block] | The table below provides information regarding the carrying amounts and accumulated amortization of total amortized intangible assets as of the dates set forth below.
| Gross |  |  |  |  | Net
| Carrying |  | Accumulated |  | Carrying
| Amount |  | Amortization |  | Amount
| (dollars in thousands)
As of December 31, 2015: |  |  |  |  |  |  |  |
Core deposit intangibles | $ | 6,011 |  | $ | (2,103) |  | $ | 3,908
As of December 31, 2014: |  |  |  |  |  |  |  |
Core deposit intangibles | $ | 6,011 |  | $ | (1,186) |  | $ | 4,825
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | Aggregate amortization expense was $917,000, $507,000 and $30,000 for 2015, 2014 and 2013. Estimated amortization expense for each of the next five years (in thousands):
2016 | $ | 820
2017 |  | 724
2018 |  | 627
2019 |  | 531
2020 |  | 434

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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