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Note 13 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2015
Stockholders' Equity Note [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
December 31, 2015 |  | Unrealized Gains and (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 | )
December 31, 2014 |  | Unrealized Gains and (Losses) on Available for Sale Securities |  | Defined Benefit Pension Items |  | Total
|  | (In thousands)
Beginning balance, net of tax |  | $ | (8,522 | ) |  | $ | (2,853 | ) |  | $ | (11,375 | )
Other comprehensive income (loss) before reclassifications, net of tax |  |  | 13,548 |  |  |  | (3,790 | ) |  |  | 9,758 |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax |  |  | (1,634 | ) |  |  | 344 |  |  |  | (1,290 | )
Net current period other comprehensive income (loss), net of tax |  |  | 11,914 |  |  |  | (3,446 | ) |  |  | 8,468 |
Ending balance, net of tax |  | $ | 3,392 |  |  | $ | (6,299 | ) |  | $ | (2,907 | )
December 31, 2013 |  | Unrealized Gains and (Losses) on Available for Sale Securities |  | Defined Benefit Pension Items |  | Total
|  | (In thousands)
Beginning balance, net of tax |  | $ | 18,921 |  |  | $ | (6,784 | ) |  | $ | 12,137 |
Other comprehensive income before reclassifications, net of tax |  |  | (26,541 | ) |  |  | 3,261 |  |  |  | (23,280 | )
Amounts reclassified from accumulated other comprehensive income, net of tax |  |  | (902 | ) |  |  | 670 |  |  |  | (232 | )
Net current period other comprehensive income, net of tax |  |  | (27,443 | ) |  |  | 3,931 |  |  |  | (23,512 | )
Ending balance, net of tax |  | $ | (8,522 | ) |  | $ | (2,853 | ) |  | $ | (11,375 | )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
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 expense
Prior service credits |  |  | 46 | (1) |  | Other operating expense
|  |  | (1,132 | ) |  | Total before tax
|  |  | 489 |  |  | Tax benefit
|  | $ | (643 | ) |  | Net of tax
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: |  | $ | 2,875 |  |  | Net gain on sale of securities
|  |  | (1,241 | ) |  | Tax expense
|  | $ | 1,634 |  |  | Net of tax
Amortization of defined benefit pension items: |  |  |  |  |  |
Actuarial losses |  | $ | (700 | )(1) |  | Other operating expense
Prior service credits |  |  | 45 | (1) |  | Other operating expense
|  |  | (655 | ) |  | Total before tax
|  |  | 311 |  |  | Tax benefit
|  | $ | (344 | ) |  | Net of tax
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: |  | $ | 3,021 |  |  | Net gain on sale of securities
|  |  | (1,321 | ) |  | Tax expense
|  | $ | 1,700 |  |  | Net of tax
OTTI charges |  | $ | (1,419 | ) |  | OTTI charge
|  |  | 621 |  |  | Tax benefit
|  | $ | (798 | ) |  | Net of tax
Amortization of defined benefit pension items: |  |  |  |  |  |
Actuarial losses |  | $ | (1,237 | )(1) |  | Other operating expense
Prior service credits |  |  | 46 | (1) |  | Other operating expense
|  |  | (1,191 | ) |  | Total before tax
|  |  | 521 |  |  | Tax benefit
|  | $ | (670 | ) |  | 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=36458714&loc=SL7669686-108580 + Details
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