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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 02, 2017 | Apr. 03, 2016
Cash flows from operating activities: |  |
Net income | $ 85,221 | $ 49,986
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation | 16,143 | 16,192
Amortization | 11,070 | 20,470
Stock-based compensation | 8,945 | 7,925
Provision for excess and obsolete inventory | 2,726 | 4,373
Deferred taxes | (3,477) | (5,496)
Contingent consideration adjustment | 634 | 1,173
Retirement plans actuarial gains |  | (1,193)
Other | 2 | 484
Changes in operating assets and liabilities: |  |
Accounts receivable | (123,792) | (42,552)
Inventories | (62,152) | (702)
Prepayments and other assets | 1,104 | (1,148)
Accounts payable and other accrued expenses | (7,553) | 1,346
Deferred revenue and customer advances | (3,333) | (13,836)
Retirement plans contributions | (947) | (1,250)
Income taxes | 14,288 | (52)
Net cash (used for) provided by operating activities | (61,121) | 35,720
Cash flows from investing activities: |  |
Purchases of property, plant and equipment | (22,066) | (20,334)
Purchases of available-for-sale marketable securities | (153,317) | (221,778)
Proceeds from sales of available-for-sale marketable securities | 213,593 | 239,370
Proceeds from maturities of available-for-sale marketable securities | 88,184 | 73,458
Net cash provided by investing activities | 126,394 | 70,716
Cash flows from financing activities: |  |
Issuance of common stock under stock purchase and stock option plans | 15,084 | 9,140
Repurchase of common stock | (37,730) | (28,001)
Dividend payments | (14,021) | (12,253)
Payments related to net settlement of employee stock compensation awards | (12,289) | (8,972)
Payments of contingent consideration | (1,050) | (11,697)
Net cash used for financing activities | (50,006) | (51,783)
Effects of exchange rate changes on cash and cash equivalents | 1,595 |
Increase in cash and cash equivalents | 16,862 | 54,653
Cash and cash equivalents at beginning of period | 307,884 | 264,705
Cash and cash equivalents at end of period | $ 324,746 | $ 319,358

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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=66902209&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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 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 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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 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=66010992&loc=d3e26853-111562 Reference 3: 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 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=66010992&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=66902209&loc=d3e3179-108585 + 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=66902209&loc=d3e3602-108585 + Details
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