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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 254,778 $ 287,588
Short-term investments 365,876 327,653
Trade accounts receivable, net 98,133 82,060
Inventories 136,060 134,639
Deferred income taxes 10,059 8,194
Other current assets 28,651 28,048
Total current assets 893,557 868,182
Property, plant and equipment, net 78,020 80,516
Long-term investments 5,183 12,158
Goodwill 150,700 150,733
Intangible assets, net 13,316 11,561
Other assets 31,198 29,412
Total assets 1,171,974 1,152,562
Current liabilities:    
Accounts payable 27,304 16,803
Accrued compensation 25,190 20,955
Income taxes payable 7,768 4,148
Other current liabilities 35,899 37,405
Total current liabilities 96,161 79,311
Other liabilities 70,391 61,095
Commitments and contingencies (Note 18)      
Stockholders' equity:    
Preferred Stock, $0.01 par value per share, 2,000,000 shares authorized; none issued and outstanding      
Common Stock, no par value, 200,000,000 shares authorized; 53,171,905 and 52,748,849 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively 113 113
Additional paid-in capital 726,018 718,005
Retained earnings 267,246 278,583
Accumulated other comprehensive income 12,045 15,455
Total stockholders' equity 1,005,422 1,012,156
Total liabilities and stockholders' equity $ 1,171,974 $ 1,152,562