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Note 13 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
December 31, 2017 |  | Unrealized Gains (Losses) on Available for Sale Securities |  | Unrealized Gains (Losses) on Cash flow Hedges |  | Defined Benefit Pension Items |  | Total
|  | (In thousands)
Beginning balance, net of tax |  | $ | (3,859 | ) |  | $ | - |  |  | $ | (4,503 | ) |  | $ | (8,362 | )
Other comprehensive income (loss) before reclassifications, net of tax |  |  | (1,771 | ) |  |  | 231 |  |  |  | 485 |  |  |  | (1,055 | )
Amounts reclassified from accumulated other comprehensive income (loss), net of tax |  |  | 108 |  |  |  | - |  |  |  | 323 |  |  |  | 431 |
Net current period other comprehensive income (loss), net of tax |  |  | (1,663 | ) |  |  | 231 |  |  |  | 808 |  |  |  | (624 | )
Ending balance, net of tax |  | $ | (5,522 | ) |  | $ | 231 |  |  | $ | (3,695 | ) |  | $ | (8,986 | )
December 31, 2016 |  | Unrealized Gains (Losses) on Available for Sale Securities |  | Defined Benefit Pension Items |  | Total
|  | (In thousands)
Beginning balance, net of tax |  | $ | (521 | ) |  | $ | (5,041 | ) |  | $ | (5,562 | )
Other comprehensive income (loss) before reclassifications, net of tax |  |  | (2,452 | ) |  |  | 235 |  |  |  | (2,217 | )
Amounts reclassified from accumulated other comprehensive income (loss), net of tax |  |  | (886 | ) |  |  | 303 |  |  |  | (583 | )
Net current period other comprehensive income (loss), net of tax |  |  | (3,338 | ) |  |  | 538 |  |  |  | (2,800 | )
Ending balance, net of tax |  | $ | (3,859 | ) |  | $ | (4,503 | ) |  | $ | (8,362 | )
December 31, 2015 |  | Unrealized Gains (Losses) on Available for Sale Securities |  | Defined Benefit Pension Items |  | Total
|  | (In thousands)
Beginning balance, net of tax |  | $ | 3,392 |  |  | $ | (6,299 | ) |  | $ | (2,907 | )
Other comprehensive income (loss) before reclassifications, net of tax |  |  | (3,818 | ) |  |  | 615 |  |  |  | (3,203 | )
Amounts reclassified from accumulated other comprehensive income (loss), net of tax |  |  | (95 | ) |  |  | 643 |  |  |  | 548 |
Net current period other comprehensive income (loss), net of tax |  |  | (3,913 | ) |  |  | 1,258 |  |  |  | (2,655 | )
Ending balance, net of tax |  | $ | (521 | ) |  | $ | (5,041 | ) |  | $ | (5,562 | )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
For the year ended December 31, 2017
Details about Accumulated Other Comprehensive Income Components |  | Amounts Reclassified from Accumulated Other Comprehensive Income |  | Affected Line Item in the Statement Where Net Income is Presented
(Dollars in thousands)
Unrealized gains (losses) on available for sale securities: |  | $ | (186 | ) |  | Net loss on sale of securities
|  |  | 78 |  |  | Tax expense
|  | $ | (108 | ) |  | Net of tax
Amortization of defined benefit pension items: |  |  |  |  |  |
Actuarial losses |  | $ | (605 | ) (1) |  | Other operating expenses
Prior service credits |  |  | 45 | (1) |  | Other operating expenses
|  |  | (560 | ) |  | Total before tax
|  |  | 237 |  |  | Tax expense
|  | $ | (323 | ) |  | Net of tax
For the year ended December 31, 2016
Details about Accumulated Other Comprehensive Income Components |  | Amounts Reclassified from Accumulated Other Comprehensive Income |  | Affected Line Item in the Statement Where Net Income is Presented
(Dollars in thousands)
Unrealized gains (losses) on available for sale securities: |  | $ | 1,524 |  |  | Net gain on sale of securities
|  |  | (638 | ) |  | Tax expense
|  | $ | 886 |  |  | Net of tax
Amortization of defined benefit pension items: |  |  |  |  |  |
Actuarial losses |  | $ | (568 | ) (1) |  | Other operating expenses
Prior service credits |  |  | 45 | (1) |  | Other operating expenses
|  |  | (523 | ) |  | Total before tax
|  |  | 220 |  |  | Tax benefit
|  | $ | (303 | ) |  | Net of tax
For the year ended December 31, 2015
Details about Accumulated Other Comprehensive Income Components |  | Amounts Reclassified from Accumulated Other Comprehensive Income |  | Affected Line Item in the Statement Where Net Income is Presented
(Dollars in thousands)
Unrealized gains (losses) on available for sale securities: |  | $ | 167 |  |  | Net gain on sale of securities
|  |  | (72 | ) |  | Tax expense
|  | $ | 95 |  |  | Net of tax
Amortization of defined benefit pension items: |  |  |  |  |  |
Actuarial losses |  | $ | (1,178 | ) (1) |  | Other operating expenses
Prior service credits |  |  | 46 | (1) |  | Other operating expenses
|  |  | (1,132 | ) |  | Total before tax
|  |  | 489 |  |  | Tax benefit
|  | $ | (643 | ) |  | Net of tax

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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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