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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Cash flows from operating activities: |  |
Net Income (Loss) | $ 13,306 | $ 10,265
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock-based compensation | 20,169 | 15,356
Depreciation | 9,971 | 9,388
Amortization of intangible assets | 31,436 | 26,045
Non-cash interest expense and amortization of convertible debt issuance costs | 5,324 | 5,025
Excess tax benefits from stock-based compensation, Operating Activities | 0 | (927)
Deferred income taxes | (4,108) | (4,157)
(Gain) loss from disposal of property, plant and equipment | 169 | (29)
Effect of Exchange Rate on assumed cash liability from acquisition | 0 | 985
Change in operating assets and liabilities, net of impact of acquisitions: |  |
Accounts receivable | (23,656) | 333
Prepaid expenses and other assets | 6,824 | (3,143)
Inventories | 617 | (744)
Accounts payable | (2,795) | 2,302
Accrued salaries and benefits and other liabilities | (2,658) | (4,772)
Deferred revenue | 3,248 | 7,532
Net cash provided by operating activities | 57,847 | 61,489
Cash flows from investing activities: |  |
Purchases of property, plant and equipment | (5,444) | (4,750)
Acquisition of intangible assets | (120) | 0
Purchases of marketable securities | 0 | 54,869
Maturities of marketable securities | 32,048 | 85,746
Proceeds from sale of marketable securities | 4,450 | 50,546
Proceeds from sale of property, plant, and equipment | 28 | 0
Acquisitions of businesses, net of cash acquired | 0 | (202,523)
Net cash provided by (used in) investing activities | 30,962 | (125,850)
Cash flows from financing activities: |  |
Excess tax benefits from stock-based compensation, Financing Activities | 0 | 927
Proceeds received from issuance of common stock under employee stock plans | 10,792 | 12,277
Principal payments against lease financing obligation | (625) | (476)
Payments Related to Tax Withholding for Share-based Compensation | (3,525) | (1,861)
Payments for Repurchase of Common Stock | (50,036) | 0
Net cash provided by (used in) financing activities | (43,394) | 10,867
Effect of Exchange Rate on Cash and Cash Equivalents | 1,636 | (791)
Net increase (decrease) in cash and cash equivalents | 47,051 | (54,285)
Cash and cash equivalents at beginning of period | 135,294 | 143,764
Cash and cash equivalents at end of period | 182,345 | 89,479
Non-cash investing and financing activities during the period: |  |
Assumed cash liability from acquisition | 0 | 10,779
Property, plant and equipment received and accrued in accounts payable and other liabilities | $ 1,294 | $ 1,344

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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: 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=98514028&loc=d3e3213-108585 + Details
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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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow from issuance of shares under share-based compensation arrangement. Issuance includes, but is not limited to, exercise of stock options and similar instruments. + 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=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + 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=98514028&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=82896770&loc=d3e26853-111562 + 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 -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 Reference 2: 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=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + 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 (c) -URI http://asc.fasb.org/extlink&oid=98514028&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=98514028&loc=d3e3602-108585 + Details
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