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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 29, 2014 | Mar. 30, 2013
Cash flows from operating activities: |  |
Net income | $ 70,302 | $ 121,059
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Provisions for doubtful accounts on accounts receivable | 1,059 | 463
Provisions on inventory | 1,139 | 1,340
Stock-based compensation | 8,129 | 7,431
Deferred income taxes | (2,218) | (991)
Depreciation | 8,819 | 8,487
Amortization of intangibles | 11,523 | 9,775
Change in operating assets and liabilities, net of acquisitions: |  |
Decrease in accounts receivable | 30,147 | 16,499
Increase in inventories | (24,163) | (12,840)
Increase in other current assets | (8,008) | (506)
Increase in other assets | (7,169) | (6,181)
Decrease in accounts payable and other current liabilities | (11,491) | (45,340)
Increase in deferred revenue and customer advances | 34,356 | 26,825
Increase in other liabilities | 3,330 | 1,777
Net cash provided by operating activities | 115,755 | 127,798
Cash flows from investing activities: |  |
Additions to property, plant, equipment and software capitalization | (21,395) | (30,637)
Business acquisitions, net of cash acquired | (3,615) | 0
Purchase of investments | (607,028) | (767,541)
Maturities and sales of investments | 512,089 | 707,725
Net cash used in investing activities | (119,949) | (90,453)
Cash flows from financing activities: |  |
Proceeds from debt issuances | 10,053 | 65,632
Payments on debt | (1,295) | (10,181)
Proceeds from stock plans | 35,322 | 7,478
Purchase of treasury shares | (92,572) | (101,367)
Excess tax benefit related to stock option plans | 8,507 | 3,163
(Payments for) proceeds from derivative contracts | (314) | 694
Net cash used in financing activities | (40,299) | (34,581)
Effect of exchange rate changes on cash and cash equivalents | (921) | (11,751)
Decrease in cash and cash equivalents | (45,414) | (8,987)
Cash and cash equivalents at beginning of period | 440,796 | 481,035
Cash and cash equivalents at end of period | $ 395,382 | $ 472,048

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + 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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