CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 142,061	$ 95,143
Adjustments to reconcile net profit to net cash provided by operating activities:
Deferred taxes	(17,476)	(4,646)
Depreciation and amortization	16,786	13,141
Stock-based compensation	39,934	39,135
Tax (shortfalls) benefits from stock-based awards	13,057	8,663
Excess tax benefit from share-based payment arrangements	(13,943)	(8,663)
Equity in losses of investee, net of tax	477	0
Other non-cash operating activities	9,525	9,252
Changes in assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(93,122)	(27,123)
Inventories	(6,873)	(3,033)
Prepaid expenses and other assets	(5,069)	(2,529)
Accounts payable	(4,134)	4,408
Accrued and other long-term liabilities	38,969	6,712
Deferred revenues	46,482	28,182
Net cash provided by operating activities	166,674	158,642
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(56,368)	(36,663)
Purchase of marketable securities	(283,797)	(306,938)
Proceeds from maturities of marketable securities	328,498	238,412
Purchase of equity method investments	(46,745)	0
Proceeds from sales of marketable securities	209,302	12,518
Other investing activities	(8,031)	46
Net cash used in investing activities	142,859	(92,625)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	12,877	10,559
Common stock repurchases	(58,174)	(90,603)
Excess tax benefit from share-based payment arrangements	13,943	8,663
Employees’ taxes paid upon the vesting of restricted stock units	(26,265)	(17,574)
Net cash used in financing activities	(57,619)	(88,955)
Effect of foreign exchange rate changes on cash and cash equivalents	320	(2,893)
Net increase (decrease) in cash and cash equivalents	252,234	(25,831)
Cash and cash equivalents, beginning of the period	167,714	$ 199,871
Cash and cash equivalents, end of the period	$ 419,948