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Other Amounts Recognized in Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items] |  |  |
Amortization of prior service (cost) credit | $ 200 |  |
Amortization of actuarial loss | 83,600 |  |
Pension Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net (gain) loss | (53,285) | 12,989 | 43,207
Curtailments | (769) | (477) | (2,776)
Prior service cost (credit) | 0 | 0 | 0
Amortization of prior service (cost) credit | (337) | (634) | (1,193)
Amortization of actuarial loss | (14,840) | (12,085) | (8,382)
Total recognized in other comprehensive (income) loss | (69,231) | (207) | 30,856
Defined Benefit Plan Total Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Before Tax | (56,524) | 10,482 | 46,492
Other Postretirement Employee Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net (gain) loss | (30,323) | 3,150 | (5,435)
Curtailments | 0 | 0 | 0
Prior service cost (credit) | 5,106 | (5,278) | 0
Amortization of prior service (cost) credit | 502 | 2,680 | 1,795
Amortization of actuarial loss | 0 | 0 | 0
Total recognized in other comprehensive (income) loss | (24,715) | 552 | (3,640)
Defined Benefit Plan Total Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Before Tax | $ (19,935) | $ 4,380 | $ 2,124

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- Definition Amount before tax, after reclassification adjustments, of actuarial gain (loss) that has not been recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount before tax, after reclassification adjustments, of prior service cost (credit) that has not been recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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