XML 78 R27.htm IDEA: XBRL DOCUMENT
v2.4.1.9

INVESTMENTS (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2015
INVESTMENTS |
Summary of investments in held-to-maturity, available-for-sale and trading securities |
March 31, 2015 |  | 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: |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 15,991 |  | $ | - |  | $ | 1 |  | $ | 15,990 |  | $ | - |  | $ | - |
Municipal securities |  | 622,082 |  | 48 |  | - |  | 622,130 |  | - |  | - |
U.S. Government Agencies |  | 1,401 |  | - |  | - |  | 1,401 |  | - |  | - |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | 33,662 |  | 8 |  | - |  | 33,670 |  | - |  | - |
U.S. Government Agencies |  | 7,578 |  | - |  | 7 |  | 7,571 |  | - |  | - |
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |
Variable rate demand notes |  | 3,900 |  | - |  | - |  | 3,900 |  | - |  | - |
Total |  | $ | 684,614 |  | $ | 56 |  | $ | 8 |  | 684,662 |  | $ | - |  | $ | - |
Trading |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | 3,910 |  |  |  |  |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | - |  |  |  |  |
Total |  |  |  |  |  |  |  | $ | 688,572 |  |  |  |  |
December 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: |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 19,482 |  | $ | - |  | $ | 2 |  | $ | 19,480 |  | $ | - |  | $ | - |
Municipal securities |  | 744,542 |  | 105 |  | - |  | 744,647 |  | - |  | - |
U.S. Government Agencies |  | 9,199 |  | - |  | 1 |  | 9,198 |  | - |  | - |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | 42,940 |  | 10 |  | - |  | 42,950 |  | - |  | - |
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |
Variable rate demand notes |  | 4,001 |  | - |  | - |  | 4,001 |  | - |  | - |
Total |  | $ | 820,164 |  | $ | 115 |  | $ | 3 |  | 820,276 |  | $ | - |  | $ | - |
Trading |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | 3,910 |  |  |  |  |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities |  |  |  |  |  |  |  | - |  |  |  |  |
Total |  |  |  |  |  |  |  | $ | 824,186 |  |  |  |  |
Summarizes the underlying contractual maturities of the Company's investments |
|  | March 31, 2015 |  | December 31, 2014
|  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Less than 1 year: |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 15,991 |  | $ | 15,990 |  | $ | 19,482 |  | $ | 19,480 |
Municipal securities |  | 622,082 |  | 622,130 |  | 744,542 |  | 744,647 |
U.S. government agency securities |  | 1,401 |  | 1,401 |  | 9,199 |  | 9,198 |
Due 1 - 10 years: |  |  |  |  |  |  |  |  |
Municipal securities |  | 33,662 |  | 33,670 |  | 42,940 |  | 42,950 |
U.S. government agency securities |  | 7,578 |  | 7,571 |  |  |  |  |
Due 11 - 20 years: |  |  |  |  |  |  |  |  |
Auction rate securities |  | 3,910 |  | 3,910 |  | 3,910 |  | 3,910 |
Due 21 - 30 years: |  |  |  |  |  |  |  |  |
Variable rate demand notes |  | 3,900 |  | 3,900 |  | 4,001 |  | 4,001 |
Total |  | $ | 688,524 |  | $ | 688,572 |  | $ | 824,074 |  | $ | 824,186 |

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration