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Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 178,319 $ 305,437
Short-term investments 177,433 129,594
Trade accounts receivable, net 124,553 106,362
Inventories, net 165,590 155,169
Deferred income taxes 13,570 14,017
Other current assets 28,203 27,512
Total current assets 687,668 738,091
Property, plant and equipment, net 69,898 72,776
Long-term investments 256,855 157,201
Goodwill 200,212 192,381
Intangible assets, net 47,822 46,389
Other assets 17,878 17,206
Total assets 1,280,333 1,224,044
Current liabilities:    
Accounts payable 34,054 34,166
Accrued compensation 23,641 26,970
Income taxes payable 8,615 6,702
Other current liabilities 45,668 35,789
Total current liabilities 111,978 103,627
Other liabilities $ 38,919 $ 38,595
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; 53,367,109 and 53,154,666 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively $ 113 $ 113
Additional paid-in capital 739,567 734,732
Retained earnings 395,455 349,061
Accumulated other comprehensive loss (5,699) (2,084)
Total stockholders' equity 1,129,436 1,081,822
Total liabilities and stockholders' equity $ 1,280,333 $ 1,224,044