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INVESTMENTS (Tables) | 3 Months Ended
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Mar. 31, 2014
INVESTMENTS |
Summary of investments in held-to-maturity, available-for-sale and trading securities |
March 31, 2014 |  | Amortized Cost |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Fair Value |  | Continuous Unrealized Loss Position less than 12 Months |  | Continuous Unrealized Loss Position greater than 12 Months
Held-to-Maturity |  |  |  |  |  |  |  |  |  |  |  |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 22,043 |  | $ | - |  | $ | - |  | $ | 22,043 |  | $ | - |  | $ | -
Commercial paper |  | 9,990 |  | - |  | - |  | 9,990 |  | - |  | -
Municipal securities |  | 400,504 |  | 25 |  | - |  | 400,529 |  | - |  | -
Total |  | $ | 432,537 |  | $ | 25 |  | $ | - |  | 432,562 |  | $ | - |  | $ | -
Trading |  |  |  |  |  |  |  |  |  |  |  |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | 6,395 |  |  |  |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | 8,131 |  |  |  |
Total |  |  |  |  |  |  |  | $ | 447,088 |  |  |  |
December 31, 2013 |  | Amortized Cost |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Fair Value |  | Continuous Unrealized Loss Position less than 12 Months |  | Continuous Unrealized Loss Position greater than 12 Months
Held-to-Maturity |  |  |  |  |  |  |  |  |  |  |  |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 22,045 |  | $ | - |  | $ | - |  | $ | 22,045 |  | $ | - |  | $ | -
Commercial paper |  | 5,991 |  | - |  | - |  | 5,991 |  | - |  | -
Municipal securities |  | 367,819 |  | 48 |  | - |  | 367,867 |  | - |  | -
Total |  | $ | 395,855 |  | $ | 48 |  | $ | - |  | 395,903 |  | $ | - |  | $ | -
Trading |  |  |  |  |  |  |  |  |  |  |  |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | 6,392 |  |  |  |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | 9,792 |  |  |  |
Total |  |  |  |  |  |  |  | $ | 412,087 |  |  |  |
Schedule of net gain recognized through earnings on trading securities |
|  | Three-Months Ended March 31, |
|  | 2014 |  |  | 2013 |
Gain on trading securities sold |  | $ | 131 |  |  | $ | - |
(Loss) gain on trading securities held |  | (64 | ) |  | 6 |
Gain on trading securites |  | $ | 67 |  |  | $ | 6 |
Summarizes the underlying contractual maturities of the Company's investments |
|  | March 31, 2014 |  | December 31, 2013 |
|  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value |
Less than 1 year: |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 22,043 |  | $ | 22,043 |  | $ | 22,045 |  | $ | 22,045 |
Commercial paper |  | 9,990 |  | 9,990 |  | 5,991 |  | 5,991 |
Municipal securities |  | 400,504 |  | 400,529 |  | 367,819 |  | 367,867 |
Due 11 - 20 years: |  |  |  |  |  |  |  |  |
Auction rate securities |  | 11,053 |  | 11,053 |  | 11,102 |  | 11,102 |
Due 21 - 30 years: |  |  |  |  |  |  |  |  |
Auction rate securities |  | 3,473 |  | 3,473 |  | 5,082 |  | 5,082 |
Total |  | $ | 447,063 |  | $ | 447,088 |  | $ | 412,039 |  | $ | 412,087 |

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- Definition Tabular disclosure of investments in trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (c),(e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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