Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 32,526	$ 31,677
Short-term investments	121,389	157,479
Accounts receivable, less allowance for doubtful accounts of $4 and $162 at September 30, 2011 and December 31, 2010, respectively	89,631	70,893
Other receivables	12,487	3,962
Income tax receivable, net	0	2,741
Inventory	87,313	74,274
Prepaid expenses	3,337	3,270
Deferred tax assets, net	12,247	10,617
Total Current Assets	358,930	354,913
Property, plant and equipment, net	75,698	73,986
Deferred tax assets, net	5,918	0
Goodwill	4,445	0
Other assets	8,201	1,915
Long-term investments	348,103	261,160
Total Assets	801,295	691,974
Current Liabilities
Accounts payable	33,150	22,785
Unearned revenue	18,708	10,138
Accrued expenses	6,703	4,913
Accrued wages and benefits	14,753	12,125
Income tax payable, net	1,916	0
Total Current Liabilities	75,230	49,961
Deferred tax liabilities, net	0	10,350
Other non-current liabilities	14,853	11,841
Bonds payable	46,500	47,500
Total Liabilities	136,583	119,652
Commitments and contingencies (see Note 13)
Stockholders' Equity
Common stock, par value $0.01 per share; 200,000 shares authorized; 79,652 shares issued and 63,655 shares outstanding at September 30, 2011 and 79,652 shares issued and 63,010 shares outstanding at December 31, 2010	797	797
Additional paid-in capital	210,779	193,866
Accumulated other comprehensive income	13,975	26,948
Retained earnings	815,730	731,962
Less treasury stock at cost: 15,997 and 16,642 shares at September 30, 2011 and December 31, 2010, respectively	(376,569)	(381,251)
Total Stockholders' Equity	664,712	572,322
Total Liabilities and Stockholders' Equity	$ 801,295	$ 691,974