CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive Income
Beginning Balance at Dec. 31, 2011	$ 300,577	$ 666	$ 165,712	$ 947,156	$ (813,684)	$ 727
Beginning Balance (in shares) at Dec. 31, 2011		66,602,486			19,882,289
Net income	95,803			95,803
Dividends paid ($0.17 per share)	(7,956)			(7,956)
Purchases of common stock (in shares)					499,400
Purchases of common stock	(24,582)				(24,582)
Exercises of stock options and forfeitures and vesting of non-vested stock, including excess tax effect (in shares)		253,436			4,773
Exercises of stock options and forfeitures and vesting of non-vested stock, including excess tax effect	2,126	3	2,130		(7)
Stock-based compensation	4,613		4,613
Foreign currency translation	357					357
Unrealized gain on available-for-sale investments, net of income taxes	495					495
Ending Balance at Sep. 29, 2012	$ 371,433	$ 669	$ 172,455	$ 1,035,003	$ (838,273)	$ 1,579
Ending Balance (in shares) at Sep. 29, 2012		66,855,922			20,386,462