THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of operations:
Total revenues	$ 390,436,000	$ 500,275,000	$ 259,251,000
Cost of revenues	134,282,000	157,736,000	91,988,000
Gross profit	256,154,000	342,539,000	167,263,000
Operating expenses:
Research and development	169,382,000	138,310,000	92,283,000
Sales and marketing	70,544,000	60,894,000	40,294,000
General and administrative	37,046,000	24,456,000	21,736,000
Total operating expenses	276,972,000	223,660,000	154,313,000
Income (loss) from operations	(20,818,000)	118,879,000	12,950,000
Loss before taxes on income	(19,590,000)	120,138,000	13,709,000
Net income (loss)	(23,342,000)	111,951,000	10,334,000
Net income (loss) per share - basic (in dollars per share)	$ (0.54)	$ 2.71	$ 0.29
Net income (loss) per share - diluted (in dollars per share)	$ (0.54)	$ 2.55	$ 0.27
Balance sheet:
Accounts receivable, net	69,480,000	56,800,000
Inventories	36,470,000	43,318,000
Total current assets	450,223,000	538,610,000
Property and equipment, net	71,915,000	62,375,000
Intangible assets, net	54,249,000	16,134,000
Goodwill	199,196,000	132,885,000
Total assets	806,826,000	769,330,000
Accrued liabilities	51,011,000	55,696,000
Deferred revenue, current	15,710,000	10,826,000
Capital lease liabilities, current	1,377,000	1,253,000
Total current liabilities	98,062,000	105,206,000
Other long-term liabilities	17,890,000	11,982,000
Total liabilities	140,015,000	140,210,000
Retained earnings	114,441,000	137,783,000
Total shareholders' equity	666,811,000	629,120,000	443,088,000	282,074,000
Total liabilities and shareholders' equity	806,826,000	769,330,000
Statement of comprehensive loss:
Net income (loss)	(23,342,000)	111,951,000	10,334,000
Total comprehensive income (loss), net of tax	(24,746,000)	115,909,000	8,216,000
Cash flow statement:
Net income (loss)	(23,342,000)	111,951,000	10,334,000
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	35,646,000	23,868,000	19,745,000
Accounts receivable	(9,500,000)	(8,585,000)	(15,899,000)
Inventories	9,472,000	(19,436,000)	(8,639,000)
Accrued liabilities and other payables	2,610,000	48,972,000	18,288,000
Unpaid property and equipment	3,326,000	3,869,000
Net cash provided by operating activities	51,870,000	182,489,000	63,139,000
Principal payments on capital lease obligations	(1,111,000)	(918,000)	(459,000)
Net cash provided by financing activities	16,188,000	34,186,000	124,624,000
As reported
Statement of operations:
Total revenues	390,859,000	500,799,000
Cost of revenues	135,239,000	157,936,000	92,015,000
Gross profit	255,620,000	342,863,000	167,236,000
Operating expenses:
Research and development	168,721,000	138,946,000	92,508,000
Sales and marketing	70,318,000	61,068,000	40,366,000
General and administrative	36,918,000	24,541,000	21,769,000
Total operating expenses	275,957,000	224,555,000	154,643,000
Income (loss) from operations	(20,337,000)	118,308,000	12,593,000
Loss before taxes on income	(19,109,000)	119,567,000	13,352,000
Net income (loss)	(22,861,000)	111,380,000	9,977,000
Net income (loss) per share - basic (in dollars per share)	$ (0.53)	$ 2.70	$ 0.28
Net income (loss) per share - diluted (in dollars per share)	$ (0.53)	$ 2.54	$ 0.26
Balance sheet:
Accounts receivable, net	70,566,000	58,516,000
Inventories	35,963,000
Total current assets	450,802,000	540,326,000
Property and equipment, net	70,815,000
Intangible assets, net	54,362,000
Goodwill	199,558,000
Total assets	806,780,000	771,046,000
Accrued liabilities	52,588,000	57,879,000
Deferred revenue, current	15,849,000	12,018,000
Capital lease liabilities, current	1,245,000
Total current liabilities	99,646,000	108,581,000
Other long-term liabilities	17,091,000	11,635,000
Total liabilities	140,800,000	143,238,000
Retained earnings	113,610,000	136,471,000
Total shareholders' equity	665,980,000	627,808,000
Total liabilities and shareholders' equity	806,780,000	771,046,000
Statement of comprehensive loss:
Net income (loss)	(22,861,000)	111,380,000	9,977,000
Total comprehensive income (loss), net of tax	(24,265,000)	115,338,000	7,859,000
Cash flow statement:
Net income (loss)	(22,861,000)	111,380,000	9,977,000
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	35,886,000
Accounts receivable	8,870,000	(10,301,000)
Inventories	9,264,000
Accrued liabilities and other payables	1,599,000	51,259,000	18,645,000
Unpaid property and equipment	2,226,000
Net cash provided by operating activities	52,002,000
Principal payments on capital lease obligations	(1,243,000)
Net cash provided by financing activities	16,056,000
Adjustments
Statement of operations:
Total revenues	(423,000)	(524,000)
Cost of revenues	(957,000)	(200,000)	(27,000)
Gross profit	534,000	(324,000)	27,000
Operating expenses:
Research and development	661,000	(636,000)	(225,000)
Sales and marketing	226,000	(174,000)	(72,000)
General and administrative	128,000	(85,000)	(33,000)
Total operating expenses	1,015,000	(895,000)	(330,000)
Income (loss) from operations	(481,000)	571,000	357,000
Loss before taxes on income	(370,000)	571,000	357,000
Net income (loss)	(481,000)	571,000	357,000
Net income (loss) per share - basic (in dollars per share)	$ (0.01)	$ 0.01	$ 0.01
Net income (loss) per share - diluted (in dollars per share)	$ (0.01)	$ 0.01	$ 0.01
Balance sheet:
Accounts receivable, net	(1,086,000)	(1,716,000)
Inventories	507,000
Total current assets	(579,000)	(1,716,000)
Property and equipment, net	1,100,000
Intangible assets, net	(113,000)
Goodwill	(362,000)
Total assets	46,000	(1,716,000)
Accrued liabilities	(1,577,000)	(2,183,000)
Deferred revenue, current	(139,000)	(1,192,000)
Capital lease liabilities, current	132,000
Total current liabilities	(1,584,000)	(3,375,000)
Other long-term liabilities	799,000	347,000
Total liabilities	785,000	(3,028,000)
Retained earnings	831,000	1,312,000
Total shareholders' equity	831,000	1,312,000
Total liabilities and shareholders' equity	46,000	(1,716,000)
Statement of comprehensive loss:
Net income (loss)	(481,000)	571,000	357,000
Total comprehensive income (loss), net of tax	(370,000)	571,000	357,000
Cash flow statement:
Net income (loss)	(481,000)	571,000	357,000
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	(240,000)
Accounts receivable	630,000	1,716,000
Inventories	208,000
Accrued liabilities and other payables	1,011,000	(2,287,000)	(357,000)
Unpaid property and equipment	1,100,000
Net cash provided by operating activities	(132,000)
Principal payments on capital lease obligations	132,000
Net cash provided by financing activities	132,000
Amounts not properly stated for accruals related to charitable contributions and accruals related to certain purchase orders
Balance sheet:
Total liabilities	700,000
Amounts not properly stated for accruals related to charitable contributions
Balance sheet:
Total liabilities	600,000	1,700,000
Distributor price adjustments resulting in cumulative understatement of sales reserves | Adjustments
Sales Reserve	900,000	500,000
Cumulative overstatement of warranty reserve | Adjustments
Warranty reserve	(600,000)	(100,000)
Adjustment for error in purchase price allocation | Kotura and Iptronics | Adjustments
Acquired inventory	400,000
Acquired intangible assets	(100,000)
Balance sheet:
Goodwill	$ (400,000)