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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018
Operating activities: |  |  |
Net income | $ 112,369 | $ 131,258 | $ 91,060
Adjustments to reconcile net loss to net cash provided by operating activities: |  |  |
Depreciation and amortization | 23,437 | 23,799 | 25,442
Stock-based compensation expense | 8,843 | 12,092 | 9,980
Gain on sale of business, net | 0 | 0 | (4,666)
Deferred income taxes | (764) | 7,825 | 33,656
Income (Loss) from Equity Method Investments | 246 | 0 | 0
Other Noncash Income (Expense) | 2,611 | 2,347 | (15)
Changes in operating assets and liabilities (net of effects of business acquisitions/divestitures): |  |  |
Accounts receivable | 13,902 | 3,496 | (16,612)
Inventories | (13,917) | (9,922) | (7,563)
Prepaid expenses and other assets | 4,477 | 368 | 1,747
Accounts payable and accrued liabilities | (26,128) | (11,903) | 13,106
Income taxes | 2,080 | 2,851 | (3,093)
Net cash provided by operating activities | 140,977 | 162,211 | 143,042
Investing activities: |  |  |
Purchases of property, plant and equipment | (27,277) | (32,825) | (21,777)
Payments to Acquire Equity Method Investments | (6,000) | 0 | 0
Sale of business, net of cash transferred with business | 0 | 0 | 19,141
Other | (2,842) | (1,638) | (269)
Net cash used in investing activities | (36,119) | (34,463) | (2,905)
Financing activities: |  |  |
Payment of dividends | (45,756) | (44,732) | (42,873)
Proceeds from exercise of stock options | 5,511 | 25,658 | 12,999
Payment, Tax Withholding, Share-based Payment Arrangement | (9,065) | (5,651) | (3,936)
Purchase of treasury stock | (64,514) | (3,182) | (1,462)
Proceeds from borrowing on credit facilities | 20,697 | 13,637 | 23,221
Repayment of borrowing on credit facilities | 21,855 | 13,568 | 78,419
Principal payments on debt | (48,672) | 0 | 0
Other | 134 | 210 | (210)
Net cash used in financing activities | (163,520) | (27,628) | (90,680)
Effect of exchange rate changes on cash and cash equivalents | (2,767) | (2,475) | (1,974)
Net (decrease) increase in cash and cash equivalents | (61,429) | 97,645 | 47,483
Cash and cash equivalents, beginning of period | 279,072 | 181,427 | 133,944
Cash and cash equivalents, end of period | 217,643 | 279,072 | 181,427
Cash paid during the period for: |  |  |
Interest | 2,401 | 2,651 | 2,976
Income taxes | $ 29,600 | $ 24,335 | $ 33,267

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