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The amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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No definition available.

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Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties.

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Fair value portion of accrued expenses.

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES - Assets - Recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair value amounts included in the carrying value of
Cash and cash equivalents	$ 341,526	$ 2,175,417	$ 1,240,717	$ 370,323
Short-term investments	257,653	744,610
Investments	9,519	15,348
Asset transfers between Level 1 and Level 2 measurements	0	0
Total fair value
Fair value amounts included in the carrying value of
Cash and cash equivalents	341,526	2,175,417
Short-term investments	257,653	744,610
Accounts receivable, net	231	371
Investments	9,519	15,348
Accrued liabilities	(126)	(588)
Assets measured at fair value	608,803	2,935,158
Cash	267,056	255,723
Foreign currency derivatives	105	(217)
Money market funds \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value	27,784	664,005
Certificates of deposit \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value	4,908	85,007
Commercial paper \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value	43,503	430,605
Variable rate demand notes \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value	21,412
U.S. Treasuries \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value		260,035
Municipal securities \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value	217,955	731,744
U.S. government agency securities \| Total fair value
Fair value amounts included in the carrying value of
Assets measured at fair value	26,080	508,256
Level 1
Fair value amounts included in the carrying value of
Cash and cash equivalents	294,840	919,728
Assets measured at fair value	294,840	919,728
Cash	267,056	255,723
Level 1 \| Money market funds
Fair value amounts included in the carrying value of
Assets measured at fair value	27,784	664,005
Level 2
Fair value amounts included in the carrying value of
Cash and cash equivalents	46,686	1,255,689
Short-term investments	257,653	744,610
Accounts receivable, net	231	371
Investments	9,519	15,348
Accrued liabilities	(126)	(588)
Assets measured at fair value	313,963	2,015,430
Foreign currency derivatives	105	(217)
Level 2 \| Certificates of deposit
Fair value amounts included in the carrying value of
Assets measured at fair value	4,908	85,007
Level 2 \| Commercial paper
Fair value amounts included in the carrying value of
Assets measured at fair value	43,503	430,605
Level 2 \| Variable rate demand notes
Fair value amounts included in the carrying value of
Assets measured at fair value	21,412
Level 2 \| U.S. Treasuries
Fair value amounts included in the carrying value of
Assets measured at fair value		260,035
Level 2 \| Municipal securities
Fair value amounts included in the carrying value of
Assets measured at fair value	217,955	731,744
Level 2 \| U.S. government agency securities
Fair value amounts included in the carrying value of
Assets measured at fair value	$ 26,080	$ 508,256