CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows provided by operating activities:
Net income	$ 144,957	$ 128,046	$ 84,172
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	17,261	11,426	7,011
Amortization of intangible assets	9,634	1,193	144
Amortization of premium and accretion of discount on available-for-sale marketable securities, net	92	1,242	2,061
Stock-based compensation expenses	60,353	30,618	17,564
Deferred income tax benefit, net	(6,037)	(7,093)	(5,455)
Loss from sale of business	5,269
Other expenses (income), net	713	551	(994)
Changes in assets and liabilities:
Inventories, net	(22,544)	(20,178)	(15,690)
Prepaid expenses and other assets	(67,323)	(2,711)	(20,943)
Trade receivables, net	(124,071)	(60,514)	(38,139)
Operating lease right-of-use assets and liabilities, net and effect of exchange rate differences	2,192
Trade payables, net	47,837	31,482	35,455
Employees and payroll accruals	18,592	4,583	9,394
Warranty obligations	50,780	41,878	20,436
Deferred revenues	83,137	37,041	14,106
Other liabilities	38,158	(8,485)	27,543
Net cash provided by operating activities	259,000	189,079	136,665
Cash flows from investing activities:
Business combinations, net of cash acquired	(38,435)	(94,737)
Purchase of property, plant and equipment	(72,562)	(38,608)	(21,382)
Withdrawal from (investment in) bank deposits	4,860	(9,870)
Investment in restricted bank deposits	(26,145)	(112)	(619)
Investment in available-for-sale marketable securities	(160,054)	(142,627)	(143,675)
Proceed from sales and maturities of available-for-sale marketable securities	142,744	129,345	80,269
Other investing activities	(3,261)
Net cash used in investing activities	(152,853)	(156,609)	(85,407)
Cash flows from financing activities:
Repayment of bank loans, net	(9,265)	(3,786)
Proceeds from issuance of shares under stock purchase plan and upon exercise of stock-based awards	9,066	10,021	7,240
Change in non-controlling interests	(71,468)	(14,190)
Other financing activities	(1,354)
Net cash provided (used in) by financing activities	(73,021)	(7,955)	7,240
Increase in cash and cash equivalents	33,126	24,515	58,498
Cash and cash equivalents at the beginning of the period	187,764	163,163	104,683
Effect of exchange rate differences on cash and cash equivalents	3,011	86	(18)
Cash and cash equivalents at the end of the period	223,901	187,764	163,163
Supplemental disclosure of non-cash activities:
Operating lease, right of use assets	37,298
Issuance of common stock upon business combination	34,601
Goodwill	3,067
Supplemental disclosure of cash flow information:
Cash paid for income taxes	41,076	15,368	3,100
Cash paid for interest on bank loans	$ 1,096	$ 143