Stock-Based Awards - Stock Options Assumptions (Details) (USD $)	12 Months Ended
Dec. 25, 2011 Years	Dec. 26, 2010 Years	Dec. 27, 2009 Years
Non-Employee Director Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.25%	2.69%	2.45%
Expected life (In years)	5	5	5
Expected volatility	47.93%	45.93%	35.00%
Expected dividend yield	0.00%	0.00%	0.00%
Weighted-average fair value	$ 3.78	$ 4.68	$ 1.71
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.90%	3.19%	2.72%
Expected life (In years)	6	6	6
Expected volatility	43.79%	41.60%	31.01%
Expected dividend yield	0.00%	0.00%	0.00%
Weighted-average fair value	$ 4.81	$ 4.99	$ 1.29

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References+ Details

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References+ Details