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Repurchase Agreements and Other Borrowings Repurchase Agreements and Other Borrowings (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Schedule of Securities Financing Transactions [Table Text Block] | Collateral pledged by class for repurchase agreements are as follows (in thousands):
| June 30, 2018 | December 31, 2017
US Treasury securities and obligations of U.S. government corporations & agencies | $ | 94,460 |  | $ | 100,895 |
Mortgage-backed securities: GSE: residential | 47,202 |  | 54,493 |
Total | $ | 141,662 |  | $ | 155,388 |

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