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Summary of Significant Accounting and Reporting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Schedule of Allowance For Doubtful Accounts
The following table presents the activity in the Company’s allowance for doubtful accounts:
 
Beginning
Balance
 
Net
Additions/
(Reductions)
to Costs and
Expenses
 
Deductions
and Other
Adjustments
 
Ending
Balance
Year Ended December 31, 2014:
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
3,202,388

 
$
(300,000
)
 
$
(191,140
)
 
$
2,711,248

Year Ended December 31, 2013:
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
3,400,000

 
$
—

 
$
(197,612
)
 
$
3,202,388

Year Ended December 31, 2012:
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
3,400,000

 
$
(577
)
 
577*

 
$
3,400,000


 
*Represents excess recoveries and other adjustments over accounts written off.
Schedule of Assets or Liabilities Having Recurring Measurements
Assets or liabilities that have recurring fair value measurements are shown below as of December 31, 2014 and December 31, 2013:
 
 
 
 
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, 2014
 
(Level I)
 
(Level 2)
 
(Level 3)
Cash & Cash Equivalents
$
497,429,804

 
$
497,429,804

 
$
—

 
$
—

Short-Term Investments:
 
 
 
 
 
 
 
Other
1,021

 
1,021

 


 


Long-Term Investments:
 
 
 
 
 
 
 
Corporate Bonds
—

 


 


 


Common Stocks
24,648,451

 
24,648,451

 
—

 
—

Mutual Funds – Equity
89,994,116

 
89,994,116

 
—

 
—

Total
$
612,073,392

 
$
612,073,392

 
$
—

 
$
—


 
 
 
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, 2013
 
(Level I)
 
(Level 2)
 
(Level 3)
Cash & Cash Equivalents
$
309,591,724

 
$
309,591,724

 
$
—

 
$
—

Long-Term Investments:
 
 
 
 
 
 
 
Common Stocks
33,282,439

 
33,282,439

 
—

 
—

Mutual Funds – Equity
73,723,083

 
73,723,083

 
—

 
—

Total
$
416,597,246

 
$
416,597,246

 
$
—

 
$
—
Schedule of Amortized Cost, Unrealized Gains And Losses, And Market Value of Investment Securities
The amortized cost, unrealized gains and losses, and market value of investment securities are shown as of December 31, 2014 and 2013:
 
 
Unrealized
2014
Cost
 
Gains
 
Losses
 
Market Value
Short-Term Investments:
 
 
 
 
 
 
 
Other
1,021

 
 
 
 
 
1,021

Long-Term Investments:
 
 
 
 
 
 
 
Common Stocks
17,069,742

 
7,933,717

 
(355,008
)
 
24,648,451

Mutual Funds-Equity
80,852,329

 
9,922,204

 
(780,417
)
 
89,994,116

Total
$
97,923,092

 
$
17,855,921

 
$
(1,135,425
)

$
114,643,588


 
Unrealized
2013
Cost
 
Gains
 
Losses
 
Market Value
Long-Term Investments:
 
 
 
 
 
 
—

Common Stocks
22,799,035

 
10,532,007

 
(48,603
)
 
33,282,439

Mutual Funds-Equity
54,256,577

 
19,466,506

 
—

 
73,723,083

Total
$
77,055,612

 
$
29,998,513

 
(48,603
)
 
$
107,005,522
Schedule of Unrealized Losses on Investments
Unrealized losses on investments as of December 31, 2014 are as follows:
 
Aggregate Unrealized Losses
 
Aggregate Fair Value
Less than one year
$
1,135,425

 
$
19,972,258


Unrealized losses on investments as of December 31, 2013 are as follows:
 
 
Aggregate Unrealized Losses
 
Aggregate Fair Value
Less than one year
$
48,603

 
$
1,886,080
Schedule of Inventories
Inventories consisted of the following as of December 31, 2014 and 2013:
 
 
2014
 
2013
Raw materials
$
90,780,320

 
$
75,081,810

Work-in-process
24,135,944

 
21,409,976

Finished goods
26,841,620

 
23,582,378

Total Inventory
$
141,757,884

 
$
120,074,164
Schedule of Earnings Per Share Basic and Diluted
The following table reconciles the numerators and denominators used in the calculations of basic and diluted earnings per share (EPS) for each of the last three years adjusted for the 2 for 1 common stock split effected in the form of a 100% stock dividend issued on December 31, 2014:
 
2014
 
2013
 
2012
Numerators:
 
 
 
 
 
Numerator for both basic and diluted EPS, net income
$
288,604,579

 
$
222,929,949

 
$
168,586,840

Denominators:
 
 
 
 
 
Denominator for basic EPS, weighted-average common shares outstanding
290,952,123

 
286,920,036

 
286,195,060

Potentially dilutive shares resulting from stock option plans
3,347,236

 
1,628,306

 
1,741,002

Denominator for diluted EPS
294,299,359

 
288,548,342

 
287,936,062