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Summary of Significant Accounting and Reporting Policies (Tables)
 12 Months Ended
Dec. 31, 2015
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, 2015:
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
2,711,248

 
$
—

 
$
(47,771
)
 
$
2,663,477

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
Schedule of Assets or Liabilities Having Recurring Measurements
Assets or liabilities that have recurring fair value measurements are shown below as of December 31, 2015 and December 31, 2014:
 
 
 
 
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, 2015
 
(Level I)
 
(Level 2)
 
(Level 3)
Cash & Cash Equivalents
$
551,557,527

 
$
551,557,527

 
$
—

 
$
—

Short-Term Investments:
 
 
 
 
 
 
 
Government Securities
3,010,860

 
—

 
3,010,860

 
—

Corporate Bonds
1,512,015

 
—

 
1,512,015

 
—

Other
24,480

 
24,480

 
—

 
—

Long-Term Investments:
 
 
 
 
 
 
 
Common Stocks
20,454,804

 
20,454,804

 
—

 
—

Mutual Funds – Equity
74,701,735

 
74,701,735

 
—

 
—

Total
$
651,261,421

 
$
646,738,546

 
$
4,522,875

 
$
—


 
 
 
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:
 
 
 
 
 
 
 
Common Stocks
24,648,451

 
24,648,451

 
—

 
—

Mutual Funds – Equity
89,994,116

 
89,994,116

 
—

 
—

Total
$
612,073,392

 
$
612,073,392

 
$
—

 
$
—
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, 2015 and 2014:
 
 
Unrealized
2015
Cost
 
Gains
 
Losses
 
Market Value
Short-Term Investments:
 
 
 
 
 
 
 
Government Securities
3,013,482

 
—

 
(2,622)

 
3,010,860

Corporate Bonds
1,512,405

 
—

 
(390
)
 
1,512,015

Other
24,480

 
—

 
—

 
24,480

Long-Term Investments:
 
 
 
 
 
 
 
Common Stocks
17,395,641

 
4,078,912

 
(1,019,749
)
 
20,454,804

Mutual Funds-Equity
76,481,106

 
2,067,399

 
(3,846,770
)
 
74,701,735

Total
$
98,427,114

 
$
6,146,311

 
$
(4,869,531
)

$
99,703,894


 
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
Schedule of Unrealized Losses on Investments
Unrealized losses on investments as of December 31, 2015 are as follows:
 
Aggregate Unrealized Losses
 
Aggregate Fair Value
Less than one year
$
4,869,531

 
$
65,440,181


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
Schedule of Inventories
Inventories consisted of the following as of December 31, 2015 and 2014:
 
 
2015
 
2014
Raw materials
$
110,683,958

 
$
90,780,320

Work-in-process
27,077,220

 
24,135,944

Finished goods
36,934,233

 
26,841,620

Total Inventory
$
174,695,411

 
$
141,757,884
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 two-for-one common stock split effected in the form of a 100% stock dividend issued on December 31, 2014:
 
2015
 
2014
 
2013
Numerators:
 
 
 
 
 
Numerator for both basic and diluted EPS, net income
$
318,469,859

 
$
288,604,579

 
$
222,929,949

Denominators:
 
 
 
 
 
Denominator for basic EPS, weighted-average common shares outstanding
293,096,212

 
290,952,123

 
286,920,036

Potentially dilutive shares resulting from stock option plans
3,141,687

 
3,347,236

 
1,628,306

Denominator for diluted EPS
296,237,899

 
294,299,359

 
288,548,342