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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Current assets:    
Cash and cash equivalents $ 38,103 $ 33,203
Short-term investments 144,431 147,823
Accounts receivable, less reserves of $1,240 and $1,235 in 2011 and 2010, respectively 48,206 45,901
Inventories 28,098 22,717
Deferred income taxes 6,880 6,302
Prepaid expenses and other current assets 19,628 23,059
Total current assets 285,346 279,005
Long-term investments 174,906 102,055
Property, plant, and equipment, net 31,744 29,596
Deferred income taxes 15,919 15,555
Intangible assets, net 18,910 23,130
Goodwill 82,029 82,204
Other assets 3,027 1,559
Total assets 611,881 533,104
Current liabilities:    
Accounts payable 7,098 7,153
Accrued expenses 32,290 29,346
Accrued income taxes 1,259 7,771
Deferred revenue and customer deposits 13,458 10,162
Total current liabilities 54,105 54,432
Reserve for income taxes 4,796 5,361
Commitments and contingencies (Note 10)      
Shareholders' equity:    
Common stock, $.002 par value - Authorized: 140,000 shares, issued: 42,223 and 41,065 shares in 2011 and 2010, respectively 84 82
Additional paid-in capital 135,668 102,620
Retained earnings 434,581 379,826
Accumulated other comprehensive loss, net of tax (17,353) (9,217)
Total shareholders' equity 552,980 473,311
Total liabilities and shareholders' equity $ 611,881 $ 533,104