Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 16,141	$ 28,998
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,346	9,179
Share-based compensation expense	5,330	4,175
Excess tax benefits from stock-based awards	(162)	(476)
Impairment of technology	1,000	0
Loss on disposal of assets	1	0
Deferred income tax provision	(1,448)	1,341
Changes in operating assets and liabilities
Accounts receivable	(6,533)	4,720
Inventories	(1,366)	(1,033)
Income taxes receivable	4,590	5,720
Prepaid expenses and other assets	(303)	656
Accounts payable	1,327	(3,343)
Income taxes payable	(442)	290
Other current liabilities	341	(1,347)
Deferred income on shipments to distributors	(1,202)	(2,232)
Net cash provided by operating activities	26,620	46,648
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of PhaseLink's net assets, net of cash acquired	(16,439)	0
Purchases of property, plant and equipment	(6,221)	(6,324)
Purchases of investments	(41,408)	(54,355)
Proceeds from sale and maturities of investments	41,808	32,785
Net cash provided by (used in) investing activities	(22,260)	(27,894)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of debt	(282)	(2,857)
Proceeds from the issuance of common stock	2,730	11,574
Repurchases of common stock	(28,430)	(12,473)
Payment of cash dividends	(7,135)	(6,848)
Purchase of stock for withholding taxes on vested restricted stock	(454)	(56)
Excess tax benefits from stock-based awards	162	476
Net cash used in financing activities	(33,409)	(10,184)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(29,049)	8,570
CASH AND CASH EQUIVALENTS - Beginning of period	60,610	74,738
CASH AND CASH EQUIVALENTS - End of period	$ 31,561	$ 83,308