Special Dividend (Details Textual) (USD $)	Dec. 28, 2012
Dividends Payable	$ 30,924,000
Class B Common Stock [Member]
Dividends Payable, Amount Per Share	$ 0.90909
February and May of 2013 [Member] | Class B Common Stock [Member]
Dividends Payable, Amount Per Share	$ 0.15454
Common Stock [Member]
Dividends Payable, Amount Per Share	$ 1.00
Common Stock [Member] | February and May of 2013 [Member]
Dividends Payable, Amount Per Share	$ 0.17