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Summary Of Significant Accounting And Reporting Policies (Tables) | 12 Months Ended
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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 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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