CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 20,108	$ 14,933
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,521	8,067
Amortization of intangibles	3,439	3,515
Loss on disposal of property and equipment	148	0
Stock-based compensation expense	9,428	8,141
Amortization of premium on marketable securities	429	551
Deferred income taxes	214	86
Increase (reduction) in accounts receivable allowances	193	(85)
Tax shortfall associated with employee stock plans	0	189
Change in operating assets and liabilities:
Accounts receivable	(6,385)	(1,050)
Inventories	5,185	1,203
Prepaid expenses and other assets	(639)	1,850
Accounts payable	3,039	6,303
Taxes payable and accrued liabilities	(1,566)	(1,827)
Deferred income on sales to distributors	1,787	1,235
Net cash provided by operating activities	43,901	42,733
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(4,890)	(5,144)
Payment for acquisition, net of cash acquired	0	(15,549)
Purchases of marketable securities	(66,211)	(9,993)
Proceeds from sales and maturities of marketable securities	52,921	29,035
Net cash used in investing activities	(18,180)	(1,651)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock under employee stock plans	3,448	4,375
Repurchase of common stock	(6,435)	(23,176)
Payments of dividends to stockholders	(7,483)	(7,048)
Net cash used in financing activities	(10,470)	(25,849)
NET INCREASE IN CASH AND CASH EQUIVALENTS	15,251	15,233
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	90,092	60,708
CASH AND CASH EQUIVALENTS AT END OF PERIOD	105,343	75,941
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Unpaid property and equipment	1,140	2,411
Loan applied to CamSemi purchase price	0	6,600
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes, net	$ 4,564	$ 2,065