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Summary of Significant Accounting and Reporting Policies (Tables) | 12 Months Ended
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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 |

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