Summary Of Significant Accounting And Reporting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Schedule Of Allowance For Doubtful Accounts

	Beginning Balance		Net Additions/ (Reductions) to Costs and Expenses			Deductions and Other Adjustments			Ending Balance
Year Ended December 31, 2012:
Allowance for Doubtful Accounts	$	3,400,000	$	(577	)	$	577	**	$	3,400,000
Year Ended December 31, 2011:
Allowance for Doubtful Accounts	$	4,300,000	$	(802,929	)	$	(97,071	)*	$	3,400,000

Schedule Of Assets Or Liabilities Having Recurring Measurements

			Fair Value Measurements at Reporting Date Using
	Total as of		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	December 31, 2012		(Level I)		(Level 2)		(Level 3)
Cash & Cash Equivalents	$	389,678,664	$	389,678,664	$	—	$	—
Short-Term Investments:
Certificate of Deposit	510,881		—		510,881		—
Government Securities	38,522,471		—		38,522,471		—
U.S. Treasury Notes	15,020,350		—		15,020,350		—
Corporate Bonds	6,563,228		—		6,563,228		—
Other	185,926		185,926		—		—
Long-Term Investments:
Corporate Bonds	2,180,780		—		2,180,780		—
Common Stocks	53,283,201		53,283,201		—		—
Mutual Funds – Equity	86,109,053		86,109,053		—		—
Other – Equity	261,000		261,000		—		—
Total	$	592,315,554	$	529,517,844	$	62,797,710	$	—

			Fair Value Measurements at Reporting Date Using
	Total as of		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	December 31, 2011		(Level I)		(Level 2)		(Level 3)
Cash & Cash Equivalents	$	357,986,774	$	357,986,774	$	—	$	—
Short-Term Investments:
Government Securities	35,024,030		—		35,024,030		—
U.S. Treasury Notes	25,044,000		—		25,044,000		—
Corporate Bonds	649,204		—		649,204		—
Other	91,003		91,003		—		—
Long-Term Investments:
Common Stocks	53,554,303		53,554,303		—		—
Mutual Funds – Equity	73,749,772		73,749,772		—		—
Certificate of Deposit	505,390		—		505,390		—
Other – Equity	358,700		358,700		—		—
Total	$	546,963,176	$	485,740,552	$	61,222,624	$	—

Schedule Of Amortized Cost, Unrealized Gains And Losses, And Market Value Of Investment Securities

	Unrealized
2012	Cost		Gains			Losses				Market Value
Short-Term Investments:
Certificate of Deposit	$	510,881	$	—		$	—			$	510,881
Government Securities	38,514,411		9,004			(944)				38,522,471
U.S. Treasury Notes	15,018,810		2,602			(1,062		)		15,020,350
Corporate Bonds	6,529,758		33,470			—				6,563,228
Other	185,926		—			—				185,926
Long-Term Investments:
Corporate Bonds	2,174,948		5,832			—				2,180,780
Common Stocks	40,893,121		12,781,501			(391,421		)		53,283,201
Mutual Funds-Equity	75,321,640		11,082,714			(295,301		)		86,109,053
Other-Equity	238,506		22,494			—				261,000
Total	$	179,388,001	$	23,937,617	—	$	(688,728	)	—	$	202,636,890

	Unrealized
2011	Cost		Gains		Losses			Market Value
Short-Term Investments:
Government Securities	$	35,016,980	$	7,090	$	(40	)	$	35,024,030
U.S. Treasury Notes	25,025,600		18,400		—			25,044,000
Corporate Bonds	648,879		325		—			649,204
Other	91,003		—		—			91,003
Long-Term Investments:
Common Stocks	42,344,526		12,274,640		(1,064,863		)	53,554,303
Mutual Funds-Equity	68,986,676		6,277,183		(1,514,087		)	73,749,772
Certificate of Deposit	505,390		—		—			505,390
Other-Equity	338,506		20,194		—			358,700
Total	$	172,957,560	$	18,597,832	(2,578,990		)	$	188,976,402

Schedule Of Unrealized Losses On Investments

	Aggregate Unrealized Losses		Aggregate Fair Value
Less than one year	$	2,578,990	$	42,845,635

	Aggregate Unrealized Losses		Aggregate Fair Value
Less than one year	$	688,728	$	22,887,686

Schedule Of Contractual Maturities Of Fixed Income Securities

Due within one year	$	60,802,856
Due between one and five years	2,180,780
Total	$	62,983,636

Schedule Of Inventories

	2012		2011
Raw materials	$	114,750,525	$	129,796,238
Work-in-process	24,588,734		26,367,953
Finished goods	20,591,007		32,589,121
Total Inventory	$	159,930,266	$	188,753,312

Schedule Of Earnings Per Share Basic And Diluted

	2012		2011		2010
Numerators:
Numerator for both basic and diluted EPS, net income	$	168,586,840	$	164,668,228	$	137,733,969
Denominators:
Denominator for basic EPS, weighted-average common shares outstanding	143,097,530		142,492,699		139,356,831
Potentially dilutive shares resulting from stock option plans	870,501		1,784,109		1,378,936
Denominator for diluted EPS	143,968,031		144,276,808		140,735,767

Schedule of Comprehensive Income (Loss)

	Foreign Currency		Unrealized Gains(Losses) On Securities			Accumulated Other Comprehensive Income (Loss)
Balance as of December 31, 2010	$	566,903	$	21,750,000		$	22,316,903
Other comprehensive income (loss)	1,563,054		(11,337,754		)	(9,774,700		)
Balance as of December 31, 2011	2,129,957		10,412,246			12,542,203
Other comprehensive income (loss)	328,976		4,699,532			5,028,508
Balance as of December 31, 2012	$	2,458,933	$	15,111,778		$	17,570,711