UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES:
Net income	$ 1,461,079	$ 2,047,091
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	101,953	73,520
Amortization	127,375	128,210
Provision for uncollectible accounts, net	32,401	17,242
Deferred income tax benefit	(71,972)	(63,675)
Stock-based compensation expense and other stock-based payments	175,131	174,068
Amortization of debt issuance costs	5,747	5,913
Amortization of debt discount	51,512	49,868
Impairment of goodwill	940,700	0
Impairment of cost-method investments	63,208	0
Changes in assets and liabilities:
Accounts receivable	(470,295)	(289,604)
Prepaid expenses and other current assets	(104,097)	(86,808)
Accounts payable, accrued expenses and other current liabilities	526,414	191,881
Other	(20,968)	(26,547)
Net cash provided by operating activities	2,818,188	2,221,159
INVESTING ACTIVITIES:
Purchase of investments	(4,820,737)	(5,597,897)
Proceeds from sale of investments	2,835,570	3,180,981
Additions to property and equipment	(168,076)	(126,637)
Acquisitions and other investments, net of cash acquired	(811)	(135,664)
Acquisition of land use rights	(48,494)	0
Proceeds from foreign currency contracts	0	453,818
Payments on foreign currency contracts	0	(448,640)
Change in restricted cash	(28)	0
Net cash used in investing activities	(2,202,576)	(2,674,039)
FINANCING ACTIVITIES:
Proceeds from the issuance of long-term debt	994,705	1,610,449
Payment of debt issuance costs - revolving credit facility	0	(4,005)
Payments related to conversion of senior notes	0	(147,629)
Repurchase of common stock	(757,477)	(2,267,384)
Payments of contingent consideration	0	(10,700)
Proceeds from exercise of stock options	13,262	19,139
Excess tax benefits on stock-based awards and other equity deductions	72,116	90,935
Net cash provided by (used in) financing activities	322,606	(709,195)
Effect of exchange rate changes on cash and cash equivalents	6,786	(144,918)
Net increase (decrease) in cash and cash equivalents	945,004	(1,306,993)
Cash and cash equivalents, beginning of period	1,477,265	3,148,651
Cash and cash equivalents, end of period	2,422,269	1,841,658
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid during the period for income taxes	612,612	499,421
Cash paid during the period for interest	87,427	50,400
Non-cash investing activity for contingent consideration	$ 0	$ 9,170