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Transactions with Executive Officers, Directors and Principal Stockholders (Tables) | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Schedule of Participating Mortgage Loans [Table Text Block] | Loans to principal officers, directors, and their affiliates during the years ended December 31, 2017 and 2016 were as follows:
|  | 2017 |  |  | 2016 |
|  | (dollars in thousands) |
Balance, January 1, |  | $ | 49,710 |  |  | $ | 39,232 |
New loans |  |  | 11,089 |  |  |  | 25,274 |
Repayments |  |  | (4,499) |  |  |  | (14,796) |
Balance, December 31, |  | $ | 56,300 |  |  | $ | 49,710 |

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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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