Subsequent Events - Declared Dividends (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended
	Nov. 29, 2012
SpecialDividendsPerShareClassA	$ 1.00
SpecialDividendsPerShareClassB	$ 0.65
CashDividendsDeclared	$ 15,000
Class A Common Stock
Common Stock, Dividends, Per Share, Declared	$ 0.25	[1]
Class B Common Stock
Common Stock, Dividends, Per Share, Declared	$ 0.1625	[2]

[1] The Board's current intention is to continue to pay quarterly dividends in 2013 at the most recent rate of $.25 per Class A share

[2] The Board's current intention is to continue to pay quarterly dividends in 2013 at the most recent rate of $.1625 per Class B share