Consolidated Statement Of Changes in Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock at Cost [Member]	Accumulated Other Comprehensive Income [Member]	Non-controlling Interest [Member]	Total
Beginning Balance at Dec. 25, 2010	$ 665	$ 169,268	$ 844,132	$ (763,182)	$ 881	$ (797)	$ 250,967
Beginning Balance, shares at Dec. 25, 2010	66,535,169			18,674,902
Net income (loss)			50,217			(62)	50,155
Dividends paid ($0.10 per share)			(4,788)				(4,788)
Purchases of common stock, shares				196,693
Purchases of common stock				(9,266)			(9,266)
Purchase of noncontrolling interest		(8,859)				859	(8,000)
Stock-based compensation		2,473					2,473
Exercises of stock options and issuance and vesting of non-vested stock, including shortfall tax effect	1	473		(41)			433
Exercises of stock options and issuance and vesting of non-vested stock, including shortfall tax effect, shares	54,611			1,057
Foreign currency translation					213		213
Unrealized gain on available-for-sale investments, net of income taxes					293		293
Ending Balance at Jun. 25, 2011	$ 666	$ 163,355	$ 889,561	$ (772,489)	$ 1,387		$ 282,480
Ending Balance, shares at Jun. 25, 2011	66,589,780			18,872,652