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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
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Other expense |  | $ (4,923) | $ (4,536)
Total before tax |  | 17,514 | 15,176
Tax benefit |  | (5,254) | (5,615)
Net income |  | 12,260 | 9,561
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |
Other expense | [1] | (151) | (192)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |
Other expense | [1] | 11 | 11
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Total before tax |  | (140) | (181)
Tax benefit |  | 60 | 78
Net income |  | $ (80) | $ (103)
[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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