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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Sep. 30, 2011
Current assets:    
Cash and cash equivalents $ 42,214 $ 54,684
Marketable securities 66,282 51,524
Accounts receivable, net 24,364 26,433
Inventories 26,302 23,986
Deferred tax assets 2,719 2,610
Other 3,341 2,997
Total current assets 165,222 162,234
Marketable securities, long-term 5,162 1,603
Property, equipment and improvements, net 15,347 15,370
Identifiable intangible assets, net 11,192 14,360
Goodwill 85,544 86,012
Deferred tax assets 5,219 3,771
Other 480 545
Total assets 288,166 283,895
Current liabilities:    
Accounts payable 6,369 6,492
Accrued compensation 6,853 7,758
Accrued warranty 998 941
Other 4,337 4,295
Total current liabilities 18,557 19,486
Income taxes payable 3,109 2,620
Deferred tax liabilities 637 813
Other noncurrent liabilities 114 260
Total liabilities 22,417 23,179
Contingencies (see Note 10)      
Stockholders' equity:    
Preferred stock, $.01 par value; 2,000,000 shares authorized; none issued and outstanding 0 0
Common stock, $.01 par value; 60,000,000 shares authorized; 29,197,615 and 29,100,577 shares issued 292 291
Additional paid-in capital 198,185 194,580
Retained earnings 107,821 102,668
Accumulated other comprehensive loss (14,856) (10,457)
Treasury stock, at cost, 3,383,267 and 3,471,930 shares (25,693) (26,366)
Total stockholders' equity 265,749 260,716
Total liabilities and stockholders' equity $ 288,166 $ 283,895