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Note 13 - Accumulated Other Comprehensive Income - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Net Income | $ 12,725 |  | $ 30,435 | $ 24,985 |  | $ 39,996
Other expense | (3,185) |  | (4,419) | (8,108) |  | (8,955)
Total before tax | 19,500 |  | 51,152 | 37,014 |  | 66,328
Tax benefit | (6,775) |  | (20,717) | (12,029) |  | (26,332)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |
Net Income |  |  | 1,350 |  |  | 1,350
Unrealized gains on available for sale securities: |  |  | 2,363 |  |  | 2,363
Tax benefit |  |  | (1,013) |  |  | (1,013)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |
Other expense | (151) | [1] |  | (302) | [1] | (384)
Other expense |  |  | (192) |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |  |  |  |
Other expense | 11 | [1] |  | 22 | [1] | 23
Other expense |  |  | 12 |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |
Net Income | (81) |  | (103) | (161) |  | (206)
Total before tax | (140) |  | (180) | (280) |  | (361)
Tax benefit | $ 59 |  | $ 77 | $ 119 |  | $ 155
[1] | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 9 of the Notes to Consolidated Financial Statements "Pension and Other Postretirement Benefit Plans".)

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- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (b)(7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20187-122688 + Details
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