| Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
| | For the year Ended December 31, 2016 | | | | | | | | | | | | | | | | | | | | | | Available-for-sale securities: | | | | | | Reclassification adjustment for net gains reclassified into net income | | $ | (960 | ) | Net gain on sale of securities | | | | | 326 | | Income tax expense (benefit) | | | | $ | (634 | ) | | | | For the year Ended December 31, 2015 | | | | | | | | | | | | | | | | | | | | | | Available-for-sale securities: | | | | | | Reclassification adjustment for net gains reclassified into net income | | $ | (2,296 | ) | Net gain on sale of securities | | | | | 781 | | Income tax expense (benefit) | | | | $ | (1,515 | ) | | | | For the year Ended December 31, 2014 | | | | | | | | | | | | | | | | | | | | | | Available-for-sale securities: | | | | | | Reclassification adjustment for net gains reclassified into net income | | $ | (6,272 | ) | Net gain on sale of securities | | | | | 2,132 | | Income tax expense (benefit) | | | | $ | (4,140 | ) | |
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| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
| | For the Year Ended December 31, | | | | | | | | | | | | | | | | $ | (238 | ) | | $ | 1,138 | | | $ | (3,092 | ) | Other comprehensive (loss) income before reclassifications | | | (912 | ) | | | 139 | | | | 8,370 | | Amounts reclassified from accumulated other comprehensive (loss) income | | | (634 | ) | | | (1,515 | ) | | | (4,140 | ) | Net other comprehensive (loss) income during the period | | | (1,546 | ) | | | (1,376 | ) | | | 4,230 | | | | | $ | (1,784 | ) | | $ | (238 | ) | | $ | 1,138 | |
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