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INVESTMENTS - HTM & AFS (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Held to Maturity and Available-for-sale |  |
Held to maturity and available-for-sale securities, Amortized Cost | $ 515,662 | $ 759,958
Held to maturity and available-for-sale securities, Gross Unrealized Holding Gains | 24 | 63
Held to maturity and available-for-sale securities, Gross Unrealized Holding Losses | 163 | 296
Held to maturity and available-for-sale securities, Fair Value | 515,523 | 759,725
Held to maturity and available-for-sale securities, Continuous Unrealized Loss Position less than 12 Months | 163 | 296
Held to Maturity, Available-for-sale, and Trading |  |
Investments, Fair Value Disclosure | 515,523 | 759,725
Short-term | Commercial paper |  |
Held-to-Maturity |  |
Amortized Cost | 7,969 | 3,978
Fair Value | 7,969 | 3,978
Short-term | Municipal securities |  |
Held-to-Maturity |  |
Amortized Cost | 464,865 | 709,207
Gross Unrealized Holding Gains | 22 | 63
Gross Unrealized Holding Losses | 148 | 192
Fair Value | 464,739 | 709,078
Continuous Unrealized Loss Position less than 12 Months | 148 | 192
Short-term | U.S. government agency securities |  |
Held-to-Maturity |  |
Amortized Cost | 17,316 | 23,369
Gross Unrealized Holding Gains | 1 |
Gross Unrealized Holding Losses | 7 | 58
Fair Value | 17,310 | 23,311
Continuous Unrealized Loss Position less than 12 Months | 7 | 58
Short-term | U.S. Treasuries |  |
Held-to-Maturity |  |
Amortized Cost | 18,093 | 8,056
Gross Unrealized Holding Gains | 1 |
Gross Unrealized Holding Losses |  | 13
Fair Value | 18,094 | 8,043
Continuous Unrealized Loss Position less than 12 Months |  | 13
Long-term | Municipal securities |  |
Held-to-Maturity |  |
Amortized Cost | 7,419 | 11,071
Gross Unrealized Holding Losses | 8 | 8
Fair Value | 7,411 | 11,063
Continuous Unrealized Loss Position less than 12 Months | $ 8 | 8
Long-term | U.S. government agency securities |  |
Held-to-Maturity |  |
Amortized Cost |  | 4,277
Gross Unrealized Holding Losses |  | 25
Fair Value |  | 4,252
Continuous Unrealized Loss Position less than 12 Months |  | $ 25

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- Definition Represents the cost of debt and equity securities, which are categorized as held-to-maturity and available-for-sale, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Represents investments in debt securities which are categorized as held-to-maturity and available-for-sale; such investments are normally measured at amortized cost (carrying value) unless circumstances indicate that the value to be recovered from the investment is less than its carried amount. This element may be used in connection with the fair value disclosures required in footnote disclosures to the financial statements. + References No definition available. + Details
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