FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES - Auction Rate Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ARS Agreement
Amortized Cost	$ 759,958	$ 824,074
Auction rate securities
ARS Agreement
Face value of investments	0	4,200
Amortized Cost		3,900
Trading auction rate securities, in short-term and long-term investments		3,900
Impairment of investments, trading securities		300
Level 1
ARS Agreement
Fair market value of investments	919,728	303,018
Level 2
ARS Agreement
Fair market value of investments	2,015,430	887,217
Level 3
ARS Agreement
Fair market value of investments		4,160
Level 3 \| Auction rate securities
ARS Agreement
Fair market value of investments		3,910
Level 3 \| Put options
ARS Agreement
Fair market value of investments		250
Total fair value
ARS Agreement
Fair market value of investments	$ 2,935,158	1,194,395
Total fair value \| Auction rate securities
ARS Agreement
Fair market value of investments		3,910
Total fair value \| Put options
ARS Agreement
Fair market value of investments		$ 250

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- Definition

Represents the impairment of trading securities. This includes both temporary and other than temporary impairment.

+ References

No definition available.

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This item represents the cost of debt and equity securities 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.

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The stated face value of investments at time of payment, which may vary from the carrying amount because of unamortized premium or discount.

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No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.

+ References

Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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 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

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