Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 374,688,291	$ 309,591,724
Accounts receivable, net	171,337,311	143,046,590
Inventories	128,349,467	120,074,164
Prepaid expenses and other	29,225,906	28,473,764
Total current assets	703,600,975	601,186,242
PLANT AND EQUIPMENT—NET	358,920,465	357,021,225
OTHER ASSETS
Goodwill	307,365,845	307,365,845
Long-term investments	108,967,579	107,005,522
Intangible Assets, net	361,350,000	366,175,000
Patents and other assets, net	24,848,059	25,334,600
Total other assets	802,531,483	805,880,967
Total assets	1,865,052,923	1,764,088,434
CURRENT LIABILITIES
Accounts payable	64,399,679	56,510,321
Accrued liabilities	102,721,345	63,470,093
Total current liabilities	167,121,024	119,980,414
LONG TERM DEBT	263,750,000	265,625,000
DEFERRED INCOME TAXES	49,258,818	50,879,337
TOTAL LIABILITIES	480,129,842	436,484,751
SHAREHOLDERS’ INVESTMENT
Common stock	8,754,600	8,734,681
Additional paid-in capital	490,518,149	478,865,778
Retained earnings	866,166,533	818,027,861
Accumulated other comprehensive income	19,483,799	21,975,363
Total shareholders’ investment	1,384,923,081	1,327,603,683
Total liabilities and shareholders’ investment	$ 1,865,052,923	$ 1,764,088,434