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Basis of Accounting and Consolidation (Tables) | 9 Months Ended
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Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | The components of accumulated other comprehensive income included in stockholders’ equity as of September 30, 2016 and December 31, 2015 are as follows (in thousands):
| Unrealized Gain (Loss) on Securities |  | Securities with Other-Than-Temporary Impairment Losses |  | Total
September 30, 2016 |  |  |  |  |
Net unrealized gains on securities available-for-sale | $ | 11,793 |  |  | $ | — |  |  | $ | 11,793 |
Unamortized losses on held-to-maturity securities transferred from available-for-sale | (421 | ) |  | — |  |  | (421 | )
Securities with other-than-temporary impairment losses | — |  |  | (1,414 | ) |  | (1,414 | )
Tax benefit (expense) | (4,433 | ) |  | 551 |  |  | (3,882 | )
Balance at September 30, 2016 | $ | 6,939 |  |  | $ | (863 | ) |  | $ | 6,076 |
December 31, 2015 |  |  |  |  |
Net unrealized gains on securities available-for-sale | $ | 3,243 |  |  | $ | — |  |  | $ | 3,243 |
Unamortized losses on held-to-maturity securities transferred from available-for-sale | (834 | ) |  | — |  |  | (834 | )
Securities with other-than-temporary impairment losses | — |  |  | (1,224 | ) |  | (1,224 | )
Tax benefit (expense) | (939 | ) |  | 477 |  |  | (462 | )
Balance at December 31, 2015 | $ | 1,470 |  |  | $ | (747 | ) |  | $ | 723 |
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income [Table Text Block] | Amounts reclassified from accumulated other comprehensive income and the affected line items in the statements of income during the nine months ended September 30, 2016 and 2015, were as follows (in thousands):
| Amounts Reclassified from Other Comprehensive Income | Affected Line Item in the Statements of Income
| Three months ended September 30, |  | Nine months ended September 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Unrealized gains on available-for-sale securities | 466 |  |  | 1 |  |  | 1,130 |  |  | 231 |  | Securities gains, net
|  |  |  |  |  |  |  | (Total reclassified amount before tax)
| (182 | ) |  | — |  |  | (440 | ) |  | (90 | ) | Income taxes
Total reclassifications out of accumulated other comprehensive income | $ | 284 |  |  | $ | 1 |  |  | $ | 690 |  |  | $ | 141 |  | Net reclassified amount

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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