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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Oct. 01, 2017
Changes in Accumulated Other Comprehensive (Loss) Income | Changes in accumulated other comprehensive income (loss), which are presented net of tax, consist of the following:
|  | Foreign Currency Translation Adjustment |  |  | Unrealized Gains (Losses) on Marketable Securities |  |  | Retirement Plans Prior Service Credit |  |  | Total |
|  | (in thousands) |
Nine Months Ended October 1, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2016, net of tax of $0, $209, $(778), respectively |  | $ | (21,921 | ) |  | $ | (60 | ) |  | $ | 1,767 |  |  | $ | (20,214 | )
Other comprehensive income before reclassifications, net of tax of $0, $1,666, $0, respectively |  |  | 34,235 |  |  |  | 2,448 |  |  |  | — |  |  |  | 36,683 |
Amounts reclassified from accumulated other comprehensive income, net of tax of $0, $(173), $(115), respectively |  |  | — |  |  |  | (264 | ) |  |  | (204 | ) |  |  | (468 | )
Net current period other comprehensive income (loss), net of tax of $0, $1,493, $(115), respectively |  |  | 34,235 |  |  |  | 2,184 |  |  |  | (204 | ) |  |  | 36,215 |
Balance at October 1, 2017, net of tax of $0, $1,702, $(893), respectively |  | $ | 12,314 |  |  | $ | 2,124 |  |  | $ | 1,563 |  |  | $ | 16,001 |
|  | Foreign Currency Translation Adjustments |  |  | Unrealized Gains (Losses) on Marketable Securities |  |  | Retirement Plans Prior Service Credit |  |  | Total |
|  | (in thousands) |
Nine Months Ended October 2, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2015, net of tax of $0, $(459), $(622), respectively |  | $ | (8,759 | ) |  | $ | (1,414 | ) |  | $ | 2,029 |  |  | $ | (8,144 | )
Other comprehensive income before reclassifications, net of tax of $0, $2,405, $34, respectively |  |  | 7,072 |  |  |  | 5,110 |  |  |  | 59 |  |  |  | 12,241 |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax of $0, $(152), $(139), respectively |  |  | — |  |  |  | (468 | ) |  |  | (244 | ) |  |  | (712 | )
Net current period other comprehensive income (loss), net of tax of $0, $2,253, $(105), respectively |  |  | 7,072 |  |  |  | 4,642 |  |  |  | (185 | ) |  |  | 11,529 |
Balance as October 2, 2016, net of tax of $0, $1,749, $(727), respectively |  | $ | (1,687 | ) |  | $ | 3,228 |  |  | $ | 1,844 |  |  | $ | 3,385 |
Reclassifications Out of Accumulated Other Comprehensive (Loss) Income to Statements of Operations | Reclassifications out of accumulated other comprehensive (loss) income to the statement of operations for the three and nine months ended October 1, 2017 and October 2, 2016 were as follows:
Details about Accumulated Other Comprehensive Income Components |  | For the Three Months Ended |  |  | For the Nine Months Ended |  |  | Affected Line Item in the Statements of Operations
|  | October 1, 2017 |  |  | October 2, 2016 |  |  | October 1, 2017 |  |  | October 2, 2016 |  |  |
|  | (in thousands) |  |  |
Available-for-sale marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains, net of tax of $67, $150, $173, $152, respectively |  | $ | 87 |  |  | $ | 334 |  |  | $ | 264 |  |  | $ | 468 |  |  | Interest income
Defined benefit pension and postretirement plans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service benefit, net of tax of $38, $46, $115, $139, respectively |  |  | 68 |  |  |  | 81 |  |  |  | 204 |  |  |  | 244 |  |  | (a)
Total reclassifications, net of tax of $105, $196, $288, $291, respectively |  | $ | 155 |  |  | $ | 415 |  |  | $ | 468 |  |  | $ | 712 |  |  | Net income
(a) | The amortization of prior service credit is included in the computation of net periodic pension cost and postretirement benefit; see Note O: “Retirement Plans.”

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e526-108580 + Details
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