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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2015
Operating activities: |  |  |
Net income | $ 52,930 | $ 52,628 | $ 44,807
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 6,769 | 6,465 | 6,464
Net gains on sales and disposals of property and equipment | (115) | (75) | (71)
Deferred income taxes | 1,608 | (2,227) | (1,334)
Excess tax benefits from settlements of stock-based equity awards | (1,539) | (2,064) | (1,205)
Stock-based compensation | 4,138 | 3,655 | 2,782
Unrealized foreign currency exchange losses (gains), net | 364 | (986) | 2,086
Provision for bad debts | (138) | 52 | 302
Changes in assets and liabilities: |  |  |
Trade accounts receivable | 482 | (9,936) | (314)
Inventories | (3,487) | (1,001) | 2,037
Other assets | (3,514) | 1,557 | 1,731
Accounts payable and accrued liabilities | 2,827 | 2,871 | (2,464)
Accrued payroll and related expenses | (8,328) | 5,486 | (2,722)
Income taxes payable | 605 | 4,235 | 2,737
Other long-term liabilities | (265) | (56) | 228
Net cash provided by operating activities | 52,337 | 60,604 | 55,064
Investing activities: |  |  |
Purchases of property and equipment | (20,150) | (4,354) | (5,784)
Proceeds from sales of property and equipment | 430 | 301 | 333
Acquisition of business |  |  | (4,117)
Purchases of short-term investments | (27,136) | (24,899) | (10,575)
Maturities of short-term investments | 4,565 | 8,032 | 3,192
Net cash used in investing activities | (42,291) | (20,920) | (16,951)
Financing activities: |  |  |
Treasury stock purchases | (31,109) | (32,131) | (30,259)
Dividends paid | (26,808) | (23,669) | (21,720)
Proceeds from issuance of common stock | 775 | 1,200 | 2,111
Excess tax benefits from settlements of stock-based equity awards | 1,539 | 2,064 | 1,205
Net proceeds from revolving credit facility | 32,000 | 14,000 | 10,000
Net cash used in financing activities | (23,603) | (38,536) | (38,663)
Effect of exchange rate changes on cash and cash equivalents | (252) | (4,153) | (3,357)
Net decrease in cash and cash equivalents | (13,809) | (3,005) | (3,907)
Cash and cash equivalents at beginning of period | 50,891 | 53,896 | 57,803
Cash and cash equivalents at end of period | 37,082 | 50,891 | 53,896
Cash paid for: |  |  |
Interest | 2,625 | 1,573 | 1,168
Income taxes, net of tax refunds received | $ 21,933 | $ 16,494 | $ 15,414

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- Definition The cash inflow from maturities, prepayments, calls and collections of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -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 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + 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 Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 + 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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- Definition Supplemental Cash Flow Information Cash Paid During Period [Abstract] + References No definition available. + Details
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