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Accumulated Other Comprehensive Income | 3 Months Ended
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Mar. 31, 2013
Accumulated Other Comprehensive Income | I. Accumulated Other Comprehensive Income At March 31, 2013 and December 31, 2012, the accumulated other comprehensive income balances were as follows:
|  | March 31, 2013 |  |  | December 31, 2012 |
|  | (in thousands) |
Retirement plans prior service benefit, net of tax of $(125) and $(125) |  | $ | 2,786 |  |  | $ | 2,895 |
Unrealized gains on marketable securities, net of tax of $835 and $835 |  |  | 3,013 |  |  |  | 2,925 |
Total accumulated other comprehensive income |  | $ | 5,799 |  |  | $ | 5,820 |
Reclassifications out of accumulated other comprehensive income to the statement of operations for the three months ended March 31, 2013 and April 1, 2012, were as follows:
Details about Accumulated Other Comprehensive Income Components |  | For the Three Months Ended |  |  | Affected Line Item in the Statements of Operations
|  | March 31, 2013 |  |  | April 1, 2012 |  |  |
|  | (in thousands) |  |  |
Available-for-Sale Marketable Securities |  |  |  |  |  |  |  |  |  |
Unrealized gains |  | $ | 275 |  |  | $ | 466 |  |  | Interest income
|  | $ | 275 |  |  | $ | 466 |  |  | Net income
Amortization of Defined Benefit Pension and Postretirement Plans |  |  |
Prior service benefit |  | $ | 109 |  |  | $ | 92 |  |  | (a)
|  | $ | 109 |  |  | $ | 92 |  |  | (a)
Total Reclassifications |  | $ | 384 |  |  | $ | 558 |  |  | Net income
(a) | The amortization of prior service benefit is included in the computation of net periodic pension and postretirement benefit costs; see Note M “Retirement Plans.”

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14-26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reclassification Adjustments -URI http://asc.fasb.org/extlink&oid=6522872 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e709-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669619-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e689-108580 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e716-108580 + Details
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