CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 14,933	$ 29,079
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,067	7,847
Amortization of intangibles	3,515	3,374
Loss on sale of property and equipment	0	159
Stock-based compensation expense	8,141	8,090
Amortization of premium on marketable securities	551	815
Deferred income taxes	86	135
Allowance for Doubtful Accounts Receivable, Period Increase (Decrease)	(85)	(15)
Excess tax benefit from employee stock plans	0	(213)
Tax benefit (deficiency) associated with employee stock plans	(189)	364
Change in operating assets and liabilities:
Accounts receivable	(1,050)	(4,039)
Inventories	1,203	(8,946)
Prepaid expenses and other assets	1,850	5,300
Accounts payable	6,303	1,870
Taxes payable and accrued liabilities	(1,827)	(4,743)
Deferred income on sales to distributors	1,235	3,401
Net cash provided by operating activities	42,733	42,478
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(5,144)	(9,885)
Payment for acquisition, net of cash acquired	(15,549)	0
Purchases of marketable securities	(9,993)	(24,751)
Proceeds from Sale and Maturity of Available-for-sale Securities	29,035	0
Net cash used in investing activities	(1,651)	(34,636)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock under employee stock plans	4,375	9,867
Repurchase of common stock	(23,176)	(25,731)
Payments of dividends to stockholders	(7,048)	(6,059)
Excess tax benefit from employee stock plans	0	213
Net cash used in financing activities	(25,849)	(21,710)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	15,233	(13,868)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	60,708	92,928
CASH AND CASH EQUIVALENTS AT END OF PERIOD	75,941	79,060
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Unpaid property and equipment	2,411	3,022
Loan applied to CamSemi purchase price	6,600	0
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid (refund) for income taxes, net	$ 2,065	$ (1,148)