CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 26,446	$ 45,190
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	12,235	11,849
Amortization of intangibles	5,247	4,723
Loss on sale of property and equipment	270	170
Stock-based compensation expense	11,502	10,670
Amortization of premium on marketable securities	809	1,296
Deferred income taxes	152	(782)
Increase in accounts receivable allowances	128	75
Excess tax benefit from employee stock plans	0	(437)
Tax benefit (deficiency) associated with employee stock plans	(189)	815
Change in operating assets and liabilities:
Accounts receivable	888	1,933
Inventories	9,995	(14,639)
Prepaid expenses and other assets	4,278	9,955
Accounts payable	(2,035)	2,509
Taxes payable and accrued liabilities	(3,579)	(3,257)
Deferred income on sales to distributors	1,241	3,017
Net cash provided by operating activities	67,388	73,087
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(7,619)	(17,394)
Payment for purchase of building (Note 10)	(10,389)	0
Payment for acquisition, net of cash acquired (Note 10)	(15,549)	0
Other assets	0	(1,261)
Purchases of marketable securities	(14,933)	(45,269)
Proceeds from sales and maturities of marketable securities	37,459	0
Net cash used in investing activities	(11,031)	(63,924)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock under employee stock plans	6,902	13,104
Repurchase of common stock	(53,731)	(45,258)
Payments of dividends to stockholders	(10,501)	(9,654)
Excess tax benefit from employee stock plans	0	437
Net cash used in financing activities	(57,330)	(41,371)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(973)	(32,208)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	60,708	92,928
CASH AND CASH EQUIVALENTS AT END OF PERIOD	59,735	60,720
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Unpaid property and equipment	3,216	4,359
Loan applied to CamSemi purchase price (Note 10)	6,600	0
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid (refund) for income taxes, net	$ 1,007	$ (3,707)