Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 296,321,622	$ 217,025,278
Short-term investments	140,384,053	169,412,999
Accounts receivable, net	235,410,326	213,537,799
Inventories, net	248,941,855	225,281,599
Prepaid expenses and other	29,319,036	25,672,579
Total current assets	950,376,892	850,930,254
PLANT AND EQUIPMENT:
Land, buildings and improvements	344,231,180	340,910,332
Machinery and equipment	843,439,691	838,887,032
Construction-in-process	39,456,490	18,156,423
Total Plant and Equipment	1,227,127,361	1,197,953,787
Less- Accumulated depreciation	(728,811,261)	(699,480,021)
Net Plant and Equipment	498,316,100	498,473,766
OTHER ASSETS:
Goodwill	307,365,845	307,365,845
Long-term investments	139,909,323	137,979,082
Intangible assets, net	250,375,000	269,675,000
Patents and other assets, net	22,460,033	21,010,121
Total Other Assets	720,110,201	736,030,048
TOTAL ASSETS	2,168,803,193	2,085,434,068
CURRENT LIABILITIES:
Accounts payable	97,553,917	92,810,316
Accrued liabilities:
Salaries, wages and vacation	16,385,833	15,860,073
Income taxes	24,952	4,293,608
Royalties	17,371,829	16,174,041
Dividends payable	28,896,914	28,526,147
Other	11,613,355	11,496,734
Total current liabilities	171,846,800	169,160,919
OTHER NON-CURRENT LIABILITIES	7,414,424	0
DEFERRED INCOME TAXES	51,454,149	54,521,489
TOTAL LIABILITIES	230,715,373	223,682,408
SHAREHOLDERS’ INVESTMENT:
Common stock, par value $.06 per share; 400,000,000 shares authorized; 251,277,515 and 259,328,613 shares issued and outstanding in 2019 and 2018 respectively.	15,076,651	15,559,717
Additional paid-in capital	807,928,139	745,324,144
Retained earnings	1,116,372,133	1,102,468,137
Accumulated other comprehensive income:
Unrealized gain on investments	1,095,486	74,549
Cumulative translation adjustment	(2,384,589)	(1,674,887)
Total shareholders’ investment	1,938,087,820	1,861,751,660
TOTAL LIABILITES AND SHAREHOLDERS' INVESTMENT	$ 2,168,803,193	$ 2,085,434,068