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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Cash flows from operating activities: |  |
Net income (loss) | $ 11,576 | $ (18,769)
Adjustments to reconcile net income (loss) to net cash flows from operating activities: |  |
Depreciation | 17,916 | 17,896
Amortization | 70,627 | 54,993
Amortization of operating lease right-of-use assets | 10,877 | 0
Amortization of deferred debt issuance costs | 2,909 | 3,881
Deferred income taxes | (39,323) | (7,139)
Stock-based compensation expense | 30,328 | 20,642
Other | 2,431 | 1,432
Changes in operating assets and liabilities, net of impact of acquisitions: |  |
Receivables | 34,690 | 58,443
Accounts payable | (8,414) | (4,217)
Accrued employee compensation | 1,740 | 92
Current income taxes | (8,536) | (10,429)
Deferred revenue | (17,735) | (47)
Other current and noncurrent assets and liabilities | (20,148) | (16,316)
Net cash flows from operating activities | 88,938 | 100,462
Cash flows from investing activities: |  |
Purchases of property and equipment | (18,739) | (16,434)
Purchases of software and distribution rights | (18,565) | (21,876)
Acquisition of businesses, net of cash acquired | (757,268) | 0
Other | (18,474) | (1,467)
Net cash flows from investing activities | (813,046) | (39,777)
Cash flows from financing activities: |  |
Proceeds from issuance of common stock | 2,662 | 2,326
Proceeds from exercises of stock options | 6,677 | 18,405
Repurchase of restricted share awards and restricted share units for tax withholdings | (2,822) | (2,588)
Repurchases of common stock | (35,617) | (54,527)
Proceeds from senior notes | 0 | 400,000
Redemption of senior notes | 0 | (300,000)
Proceeds from revolving credit facility | 280,000 | 109,000
Repayment of revolving credit facility | (15,000) | (111,000)
Proceeds from term portion of credit agreement | 500,000 | 0
Repayment of term portion of credit agreement | (19,162) | (105,332)
Payments for debt issuance costs | (12,830) | (7,253)
Payments on other debt | (8,209) | (2,332)
Net cash flows from financing activities | 695,699 | (53,301)
Effect of exchange rate fluctuations on cash | 1,488 | (752)
Net increase (decrease) in cash and cash equivalents | (26,921) | 6,632
Cash and cash equivalents, beginning of period | 148,502 | 69,710
Cash and cash equivalents, end of period | 121,581 | 76,342
Supplemental cash flow information |  |
Income taxes paid | 21,205 | 22,439
Interest paid | $ 47,741 | $ 31,914

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- Definition The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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