Stock-Based Compensation (Tables)

3 Months Ended

Mar. 25, 2012

Stock-Based Compensation [Abstract]

Stock Option Activity Under The Principal Option Plans

	Number of Shares	Weighted- Average Exercise Price	Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 25, 2011	2,600,805	$ 19.54	4.39	$ 512
Granted	410,270	11.95
Exercised	(27,926)	8.88
Forfeited or expired	(70,338)	15.36
Outstanding at March 25, 2012	2,912,811	$ 18.67	5.01	$ 429
Vested and expected to vest at March 25, 2012	2,814,373	$ 18.86	4.86	$ 429
Exercisable at March 25, 2012	2,277,838	$ 19.68	3.92	$ 429

Assumptions And Weighted-Average Fair Values Of Share-Based Payment Units Under Black-Scholes Option Pricing Model

Quarter ended	March 25, 2012		March 27, 2011
Weighted-average fair value of grants	$   5.39		$   10.17
Valuation assumptions:
Expected dividend yield	0.00	%	0.00	%
Expected volatility	51.83	%	49.82	%
Expected life (in years)	5.06		4.96
Risk-free interest rate	0.893	%	2.257	%

Nonvested Service Based Restricted Stock Units

	Number of Shares	Weighted- Average Vest Date (in years)	Weighted- Average Grant Date Fair Value
Nonvested at December 25, 2011	617,672	0.79	$ 21.29
Granted	145,020		$ 11.94
Vested	(130,709)		$ 12.21
Forfeited	(7,536)		$ 20.64
Nonvested at March 25, 2012	624,447	1.30	$ 21.03
Vested and expected to vest at March 25, 2012	568,321	1.21
Vested at March 25, 2012	1,575	—