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Note 8 - Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Unrealized gains and losses on available-for-sale securities |
|  | (in thousands) |
Balance at January 1, 2016, net of tax of $3,250 |  | $ | 5,310 |
Other comprehensive income before reclassifications, net of tax of $ 1,390 |  |  | 2,269 |
Amounts reclassified from accumulated other comprehensive income, net of tax of $( 64) |  |  | (103 | )
Net other comprehensive income (loss) |  |  | 2,166 |
Balance at December 31, 201 6, net of tax of $4,576 |  |  | 7,476 |
Other comprehensive income before reclassifications, net of tax of $ (687) |  |  | 2,001 |
Amounts reclassified from accumulated other comprehensive income, net of tax of $( 1,310) |  |  | (2,033 | )
Net other comprehensive income (loss) |  |  | (32 | )
Balance at December 31, 201 7, net of tax of $2,579 |  | $ | 7,444 |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
Details about Accumulated Other |  | Amounts Reclassified from Accumulated Other Comprehensive Income (a) |  | Statement of Operations
Comprehensive Income Component |  | 201 7 |  |  | 201 6 |  | Classification
|  | (in thousands) |  |
Unrealized gains and losses on available-for-sale securities: |  |  |  |  |  |  |  |  |
Unre alized gains and losses on securities sold |  | $ | 3,385 |  |  | $ | 876 |  | Non-operating income
Impairment expense |  |  | (42 | ) |  |  | (709 | ) | Non-operating income
Total before tax |  |  | 3,343 |  |  |  | 167 |  | Income before income taxes
Tax expense |  |  | (1,310 | ) |  |  | (64 | ) | Income tax expense
Total after tax |  | $ | 2,033 |  |  | $ | 103 |  | Net income

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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