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CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 45,160 $ 38,103
Short-term investments 105,105 144,431
Accounts receivable, less reserves of $1,131 and $1,240 in 2012 and 2011, respectively 42,387 48,206
Inventories 26,182 28,098
Deferred income taxes 6,369 6,880
Prepaid expenses and other current assets 14,394 19,628
Total current assets 239,597 285,346
Long-term investments 238,255 174,906
Property, plant, and equipment, net 34,820 31,744
Deferred income taxes 15,647 15,919
Intangible assets, net 14,770 18,910
Goodwill 81,689 82,029
Other assets 2,827 3,027
Total assets 627,605 611,881
Current liabilities:    
Accounts payable 6,815 7,098
Accrued expenses 29,590 32,290
Accrued income taxes 1,009 1,259
Deferred revenue and customer deposits 12,690 13,458
Total current liabilities 50,104 54,105
Reserve for income taxes 5,216 4,796
Commitments and contingencies (Note 9)      
Shareholders' equity:    
Common stock, $.002 par value - Authorized: 140,000 shares, issued and outstanding: 43,055 and 42,223 shares in 2012 and 2011, respectively 86 84
Additional paid-in capital 165,248 135,668
Retained earnings 436,466 434,581
Accumulated other comprehensive loss, net of tax (29,515) (17,353)
Total shareholders' equity 572,285 552,980
Total liabilities and shareholders' equity $ 627,605 $ 611,881