Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 295,456	$ 288,902
Short-term investments	140,042	300,715
Trade accounts receivable, net	106,290	116,744
Inventories	153,930	142,727
Deferred income taxes	12,422	13,428
Other current assets	28,735	16,715
Total current assets	736,875	879,231
Property, plant and equipment, net	73,642	77,536
Long-term investments	134,749	60,405
Goodwill	193,125	150,909
Intangible assets, net	48,812	13,090
Other assets	30,165	31,847
Total assets	1,217,368	1,213,018
Current liabilities:
Accounts payable	30,809	40,074
Accrued compensation	27,277	43,662
Income taxes payable	3,821	10,444
Other current liabilities	42,961	34,242
Total current liabilities	104,868	128,422
Other liabilities	53,940	63,073
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; 53,065,338 and 53,363,450 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively	113	113
Additional paid-in capital	730,110	730,571
Retained earnings	323,639	278,966
Accumulated other comprehensive income	4,698	11,873
Total stockholders' equity	1,058,560	1,021,523
Total liabilities and stockholders' equity	$ 1,217,368	$ 1,213,018