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v3.21.2

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Operating activities |  |
Net income | $ 296,363 | $ 233,294
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 82,344 | 88,273
Amortization of debt issuance costs | 1,969 | 1,685
Amortization of acquired intangible assets | 44,624 | 31,673
Write-down of intangible assets and property, plant and equipment | 915 | 10,647
Allowance for credit losses | 2,412 | 3,226
Unrealized loss (gain) on revaluation of foreign currency asset/liability | (4,252) | 6,164
Stock-based compensation expense | 58,604 | 55,818
Deferred tax benefit | (6,236) | (9,287)
Write-down of operating lease right-of-use assets and other assets | 0 | 10,244
Others, net | 806 | (1,131)
Change in operating assets and liabilities: |  |
(Increase) decrease in accounts receivable | (78,626) | 49,299
(Increase) decrease in prepaid expenses, other current assets, contract cost assets, operating lease right-of-use assets and other assets | 43,071 | (148,909)
Increase (decrease) in accounts payable | 11,138 | (2,646)
Increase (decrease) in accrued expenses, other current liabilities, operating lease liabilities and other liabilities | (74,085) | 44,830
Increase in income taxes payable | 68,430 | 52,033
Net cash provided by operating activities | 447,477 | 425,213
Investing activities |  |
Purchase of property, plant and equipment | (31,385) | (47,932)
Payment for internally generated intangible assets (including intangibles under development) | (3,907) | (8,391)
Proceeds and recovery from sale of property, plant and equipment and intangible assets | 4,511 | 447
Payment for business acquisitions, net of cash acquired | (6,613) | 0
Proceed from sale of investment | 142 | 0
Net cash (used for) investing activities | (37,252) | (55,876)
Financing activities |  |
Repayment of finance lease obligations | (8,659) | (7,240)
Payment of debt issuance costs | (3,018) | (620)
Proceeds from long-term debt | 350,000 | 0
Repayment of long-term debt | (25,500) | (25,500)
Proceeds from short-term borrowings | 0 | 455,000
Repayment of short-term borrowings | (250,000) | (280,000)
Proceeds from issuance of common shares under stock-based compensation plans | 29,786 | 19,261
Payment for net settlement of stock-based awards | (33,467) | (33,157)
Payment of earn-out consideration | (2,556) | 0
Dividend paid | (60,461) | (55,775)
Payment for stock repurchased and retired (including expenses related to stock repurchase) | (147,224) | (73,588)
Others | (6) | 0
Net cash (used for) financing activities | (151,105) | (1,619)
Effect of exchange rate changes | (17,085) | (31,415)
Net increase in cash and cash equivalents | 259,120 | 367,718
Cash and cash equivalents at the beginning of the period | 680,440 | 467,096
Cash and cash equivalents at the end of the period | 922,475 | 803,399
Supplementary information |  |
Cash paid during the period for interest | 25,715 | 28,160
Cash paid during the period for income taxes, net of refund | $ 38,040 | $ 131,456

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