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Other comprehensive income (loss) (Tables) | 9 Months Ended
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Sep. 30, 2018
Table Text Block |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Changes in Accumulated Other Comprehensive Loss by Component [1]
|  |  |  | Quarters ended | Nine months ended
|  |  | September 30, | September 30,
(In thousands) |  |  | 2018 |  | 2017 |  | 2018 |  | 2017
Foreign currency translation | Beginning Balance | $ | (46,397) | $ | (41,405) | $ | (43,034) | $ | (39,956)
|  | Other comprehensive loss |  | (605) |  | (390) |  | (3,968) |  | (1,839)
|  | Net change |  | (605) |  | (390) |  | (3,968) |  | (1,839)
|  | Ending balance | $ | (47,002) | $ | (41,795) | $ | (47,002) | $ | (41,795)
Adjustment of pension and |  |  |  |  |  |  |  |  |  |
| postretirement benefit plans | Beginning Balance | $ | (199,895) | $ | (205,928) | $ | (205,408) | $ | (211,610)
|  | Amounts reclassified from accumulated other |  |  |  |  |  |  |  |
|  |  | comprehensive loss for amortization |  |  |  |  |  |  |  |
|  |  | of net losses |  | 3,285 |  | 3,421 |  | 9,856 |  | 10,263
|  | Amounts reclassified from accumulated other |  |  |  |  |  |  |  |
|  |  | comprehensive loss for amortization |  |  |  |  |  |  |  |
|  |  | of prior service credit |  | (529) |  | (580) |  | (1,587) |  | (1,740)
|  | Net change |  | 2,756 |  | 2,841 |  | 8,269 |  | 8,523
|  | Ending balance | $ | (197,139) | $ | (203,087) | $ | (197,139) | $ | (203,087)
Unrealized net holding losses |  |  |  |  |  |  |  |  |
| on debt securities | Beginning Balance | $ | (250,422) | $ | (56,414) | $ | (102,775) | $ | (69,003)
|  | Other comprehensive (loss) income before |  |  |  |  |  |  |  |
|  |  | reclassifications |  | (39,845) |  | 9,302 |  | (187,492) |  | 15,151
|  | Other-than-temporary impairment amount reclassified |  |  |  |  |  |  |  |
|  |  | from accumulated other comprehensive loss |  | - |  | - |  | - |  | 6,740
|  | Amounts reclassified from accumulated other |  |  |  |  |  |  |  |
|  |  | comprehensive loss for gains on securities |  | - |  | (66) |  | - |  | (66)
|  | Net change |  | (39,845) |  | 9,236 |  | (187,492) |  | 21,825
|  | Ending balance | $ | (290,267) | $ | (47,178) | $ | (290,267) | $ | (47,178)
Unrealized holding gains |  |  |  |  |  |  |  |  |
| on equity securities | Beginning Balance | $ | - | $ | 672 | $ | 605 | $ | 685
|  | Reclassification to retained earnings due to cumulative |  |  |  |  |  |  |  |
|  |  | effect adjustment of accounting change |  | - |  | - |  | (605) |  | -
|  | Other comprehensive income before |  |  |  |  |  |  |  |
|  |  | reclassifications |  | - |  | 48 |  | - |  | 180
|  | Amounts reclassified from accumulated other |  |  |  |  |  |  |  |
|  |  | comprehensive income for gains on securities |  | - |  | (16) |  | - |  | (161)
|  | Net change |  | - |  | 32 |  | (605) |  | 19
|  | Ending balance | $ | - | $ | 704 | $ | - | $ | 704
Unrealized net (losses) gains |  |  |  |  |  |  |  |  |
| on cash flow hedges | Beginning Balance | $ | (78) | $ | 132 | $ | (40) | $ | (402)
|  | Other comprehensive income (loss) before |  |  |  |  |  |  |  |
|  |  | reclassifications |  | 208 |  | (250) |  | 790 |  | (869)
|  | Amounts reclassified from accumulated other |  |  |  |  |  |  |  |
|  |  | comprehensive (loss) income |  | 89 |  | 142 |  | (531) |  | 1,295
|  | Net change |  | 297 |  | (108) |  | 259 |  | 426
|  | Ending balance | $ | 219 | $ | 24 | $ | 219 | $ | 24
|  | Total | $ | (534,189) | $ | (291,332) | $ | (534,189) | $ | (291,332)
[1] All amounts presented are net of tax. |  |  |  |  |  |  |  |
Reclassification Out Of Accumulated Other Comprehensive Income [Table Text Block] |
|  | Reclassifications Out of Accumulated Other Comprehensive Loss
|  |  |  | Quarters ended | Nine months ended
|  | Affected Line Item in the | September 30, | September 30,
(In thousands) | Consolidated Statements of Operations |  | 2018 |  | 2017 |  | 2018 |  | 2017
Adjustment of pension and postretirement benefit plans |  |  |  |  |  |  |  |  |
| Amortization of net losses | Personnel costs | $ | (5,386) | $ | (5,606) | $ | (16,157) | $ | (16,819)
| Amortization of prior service credit | Personnel costs |  | 868 |  | 950 |  | 2,603 |  | 2,850
|  | Total before tax |  | (4,518) |  | (4,656) |  | (13,554) |  | (13,969)
|  | Income tax benefit |  | 1,762 |  | 1,815 |  | 5,285 |  | 5,446
|  | Total net of tax | $ | (2,756) | $ | (2,841) | $ | (8,269) | $ | (8,523)
Unrealized holding losses on debt securities |  |  |  |  |  |  |  |  |
| Other-than-temporary impairment | Other-than-temporary impairment losses on |  |  |  |  |  |  |  |
|  |  | available-for-sale debt securities | $ | - | $ | - | $ | - | $ | (8,299)
| Realized gains on sale of debt securities | Net gain on sale of debt securities |  | - |  | 83 |  | - |  | 83
|  | Total before tax |  | - |  | 83 |  | - |  | (8,216)
|  | Income tax (expense) benefit |  | - |  | (17) |  | - |  | 1,542
|  | Total net of tax | $ | - | $ | 66 | $ | - | $ | (6,674)
Unrealized holding gains on equity securities |  |  |  |  |  |  |  |  |
| Realized gain on sale of equity securities | Net gain on equity securities | $ | - | $ | 20 | $ | - | $ | 201
|  | Total before tax |  | - |  | 20 |  | - |  | 201
|  | Income tax expense |  | - |  | (4) |  | - |  | (40)
|  | Total net of tax | $ | - | $ | 16 | $ | - | $ | 161
Unrealized net (losses) gains on cash flow hedges |  |  |  |  |  |  |  |  |
| Forward contracts | Mortgage banking activities | $ | (147) | $ | (232) | $ | 870 | $ | (2,122)
|  | Total before tax |  | (147) |  | (232) |  | 870 |  | (2,122)
|  | Income tax benefit (expense) |  | 58 |  | 90 |  | (339) |  | 827
|  | Total net of tax | $ | (89) | $ | (142) | $ | 531 | $ | (1,295)
|  | Total reclassification adjustments, net of tax | $ | (2,845) | $ | (2,901) | $ | (7,738) | $ | (16,331)

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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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