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Note 13 - Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Interest expense |  | $ (18,177) | $ (13,865)
Total income tax provision |  | (2,950) | (5,254)
Net of tax |  | 11,412 | 12,260
Other expense |  | (4,691) | (4,973)
Total before tax |  | 14,362 | 17,514
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |
Other expense | [1] | (132) | (151)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |
Other expense | [1] | 10 | 11
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Total income tax provision |  | 38 | 60
Net of tax |  | (84) | (80)
Total before tax |  | (122) | $ (140)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Rate Swap [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |
Interest expense |  | (263) |
Total income tax provision |  | 83 |
Net of tax |  | $ (180) |
[1] | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 8 of the Notes to Consolidated Financial Statements "Pension and Other Postretirement Benefit Plans".)

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