Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 309,591,724	$ 389,678,664
Short-term investments	0	60,802,856
Accounts receivable	143,046,590	109,579,693
Inventories	120,074,164	159,930,266
Prepaid expenses and other	28,473,764	24,671,561
Total current assets	601,186,242	744,663,040
PLANT AND EQUIPMENT:
Land, buildings and improvements	223,191,567	198,156,137
Machinery and equipment	507,768,233	472,844,579
Construction-in-process	41,481,572	45,092,001
Total Plant and Equipment	772,441,372	716,092,717
Less- Accumulated depreciation	(415,420,147)	(366,154,545)
Net Plant and Equipment	357,021,225	349,938,172
OTHER ASSETS:
Goodwill	307,365,845	0
Long-term investments	107,005,522	141,834,034
Intangible Assets, net	366,175,000	0
Patents and other assets, net	25,334,600	29,256,089
Total other assets	805,880,967	171,090,123
TOTAL ASSETS	1,764,088,434	1,265,691,335
LIABILITIES AND SHAREHOLDERS’ INVESTMENT
Accounts payable	56,510,321	43,200,002
Accrued liabilities:
Salaries, wages and vacation	7,770,868	7,188,092
Income taxes	13,316,102	1,582,570
Royalties	9,374,449	9,889,708
Dividends declared	20,380,923	18,599,926
Current portion of Long Term Debt	7,500,000	0
Other	5,127,751	7,497,144
Total current liabilities	119,980,414	87,957,442
LONG TERM DEBT	265,625,000	0
DEFERRED INCOME TAXES	50,879,337	56,773,337
TOTAL LIABILITIES	436,484,751	144,730,779
SHAREHOLDERS’ INVESTMENT:
Preferred stock, no par value, 5,000,000 shares authorized; none issued or outstanding	0	0
Common stock, par value $.06 per share; 200,000,000 shares authorized; 145,578,023 and 143,076,357 shares issued and outstanding in 2013 and 2012 respectively.	8,734,681	8,584,581
Additional paid-in capital	478,865,778	418,766,010
Retained earnings	818,027,861	676,039,254
Accumulated other comprehensive income:
Unrealized gain on investments	19,467,441	15,111,778
Cumulative translation adjustment	2,507,922	2,458,933
Total shareholders’ investment	1,327,603,683	1,120,960,556
TOTAL LIABILITES AND SHAREHOLDERS' INVESTMENT	$ 1,764,088,434	$ 1,265,691,335