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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2012
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events Declaration of Quarterly Dividend On February 25, 2013, the Company announced that its board of directors had declared a quarterly dividend of $0.09 per share on its outstanding Class A common stock. The dividend is payable on March 19, 2013 to shareholders of record on March 8, 2013.