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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 29, 2013 | Sep. 30, 2012
Cash flows from operating activities: |  |
Net income | $ 142,604 | $ 233,592
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation | 41,873 | 39,812
Amortization | 69,495 | 67,366
Stock-based compensation | 27,227 | 30,634
Provision for excess and obsolete inventory | 9,616 | 16,408
Deferred taxes | (19,211) | 7,076
Non cash charge for the sale of inventories revalued at the date of acquisition |  | 6,089
Contingent consideration adjustment |  | (8,373)
Tax benefit related to stock options and restricted stock units | (807) | (7,600)
Retirement plans actuarial (gains) losses | (1,359) | 4,991
Impairment loss on property, plant and equipment | 1,074 |
Other | 83 | (2,359)
Changes in operating assets and liabilities: |  |
Accounts receivable | (55,963) | (76,134)
Inventories | 34,194 | 25,070
Prepayments and other assets | (26,312) | 7,278
Accounts payable and other accrued expenses | 496 | (17,600)
Deferred revenue and customer advances | (9,762) | (10,651)
Retirement plans contributions | (3,569) | (3,679)
Accrued income taxes | 13,750 | 50,313
Net cash provided by operating activities | 223,429 | 362,233
Cash flows from investing activities: |  |
Purchases of property, plant and equipment | (82,925) | (91,132)
Purchases of marketable securities | (657,188) | (510,157)
Proceeds from maturities of marketable securities | 401,901 | 156,422
Proceeds from sales of marketable securities | 332,597 | 14,250
Net cash used for investing activities | (5,615) | (430,617)
Cash flows from financing activities: |  |
Issuance of common stock under employee stock option and stock purchase plans | 16,778 | 17,959
Tax benefit related to stock options and restricted stock units | 807 | 7,600
Payments of long-term debt | (1,063) | (1,246)
Payments of contingent consideration | (388) | (43,973)
Net cash provided by (used) for financing activities | 16,134 | (19,660)
Increase (decrease) in cash and cash equivalents | 233,948 | (88,044)
Cash and cash equivalents at beginning of period | 338,920 | 573,736
Cash and cash equivalents at end of period | $ 572,868 | $ 485,692

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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