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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
May 31, 2020
May 31, 2019
Operating activities:    
Net income $ 41,045 $ 47,324
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 5,980 5,710
Net gains on sales and disposals of property and equipment (115) (72)
Deferred income taxes (221) 310
Stock-based compensation 4,609 3,947
Unrealized foreign currency exchange losses (gains) 30 (658)
Provision for bad debts 98 95
Changes in assets and liabilities:    
Trade accounts receivable (3,006) (8,286)
Inventories (2,433) (6,841)
Other assets 1,443 7,099
Operating lease assets and liabilities, net 224  
Accounts payable and accrued liabilities (2,367) (8,458)
Accrued payroll and related expenses (5,758) (2,297)
Other long-term liabilities and income taxes payable 1,227 (1,602)
Net cash provided by operating activities 40,756 36,271
Investing activities:    
Purchases of property and equipment (17,411) (8,701)
Proceeds from sales of property and equipment 321 261
Maturities of short-term investments   220
Net cash used in investing activities (17,090) (8,220)
Financing activities:    
Treasury stock purchases (16,825) (22,384)
Dividends paid (26,840) (24,468)
Repayments of long-term senior notes (800) (800)
Net proceeds of revolving credit facility 84,595 11,261
Shares withheld to cover taxes upon conversions of equity awards (2,640) (2,433)
Net cash provided by (used in) financing activities 37,490 (38,824)
Effect of exchange rate changes on cash and cash equivalents 166 (2,352)
Net increase (decrease) in cash and cash equivalents 61,322 (13,125)
Cash and cash equivalents at beginning of period 27,233 48,866
Cash and cash equivalents at end of period 88,555 35,741
Supplemental disclosure of noncash investing activities:    
Accrued capital expenditures $ 454 $ 1,256