Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 381,101,955	$ 357,986,774
Short-term investments	21,522,299	60,808,237
Accounts receivable, net	126,272,547	110,389,715
Inventories	177,119,455	188,753,312
Prepaid expenses and other	33,725,210	34,354,946
Total current assets	739,741,466	752,292,984
PLANT AND EQUIPMENT- NET	341,854,037	282,541,588
OTHER ASSETS
Long-term investments	145,087,877	128,168,165
Patents and other assets, net	28,220,949	13,024,265
Total other assets	173,308,826	141,192,430
Total assets	1,254,904,329	1,176,027,002
LIABILITIES AND SHAREHOLDERS' INVESTMENT
Accounts payable	52,234,323	65,470,573
Accrued liabilities	52,023,258	35,223,927
Total current liabilities	104,257,581	100,694,500
DEFERRED INCOME TAXES	58,001,501	48,213,981
SHAREHOLDERS' INVESTMENT
Common stock	8,565,227	8,644,174
Additional paid-in capital	410,922,622	395,229,891
Retained earnings	655,040,546	610,702,253
Other shareholders' investment	18,116,852	12,542,203
Total shareholders' investment	1,092,645,247	1,027,118,521
Total liabilities and shareholders' investment	$ 1,254,904,329	$ 1,176,027,002