BASIS OF PRESENTATION Basis of Presentation (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jan. 01, 2017	Dec. 31, 2016	Dec. 31, 2015
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 299,305
Cash and cash equivalents	2,846,300			$ 2,081,075
Total cash, cash equivalents and restricted cash as shown in the Unaudited Consolidated Statements of Cash Flows	2,847,871	$ 2,423,126		2,082,007	$ 1,478,071
Excess tax benefits on stock-based awards and other equity deductions	0	$ 72,116
Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption	290,317
Additional Paid-In Capital
Cumulative Effect of New Accounting Principle in Period of Adoption	8,988
Accounting Standards Update 2016-18 [Member]
Restricted cash included in prepaid expenses and other current assets	1,571			932
Total cash, cash equivalents and restricted cash as shown in the Unaudited Consolidated Statements of Cash Flows	$ 2,847,871			$ 2,082,007
Accounting Standards Update 2016-16 [Member] | Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (4,200)
Accounting Standards Update 2016-16 [Member] | Other Noncurrent Assets [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			6,600
Accounting Standards Update 2016-16 [Member] | Other Current Assets [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			3,300
Accounting Standards Update 2016-16 [Member] | Deferred Income Taxes [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(5,700)
Accounting Standards Update 2016-09, Unrecognized Equity Deductions component | Accounting Standards Update 2016-09 [Member] | Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption			301,400
Accounting Standards Update 2016-09, Unrecognized Equity Deductions component | Accounting Standards Update 2016-09 [Member] | Deferred Income Taxes [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(301,400)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Accounting Standards Update 2016-09 [Member] | Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption			(6,900)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Accounting Standards Update 2016-09 [Member] | Additional Paid-In Capital
Cumulative Effect of New Accounting Principle in Period of Adoption			9,000
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Accounting Standards Update 2016-09 [Member] | Deferred Income Taxes [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (2,100)