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Stock Compensation Plans (Details 2)	12 Months Ended
Stock Compensation Plans (Details 2)	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Risk-free interest rates	0.84%	1.51%	1.36%
Dividend yields	5.50%	1.84%	0.00%
Maximum [Member]
Volatility factors of expected market price of common stock	110.39%	122.17%	116.63%
Weighted average expected life of the options	4 years	4 years	4 years
Minimum [Member]
Volatility factors of expected market price of common stock	95.56%	109.71%	97.64%
Weighted average expected life of the options	1 year	1 year	1 year

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.

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