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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2011
Subsequent Events [Abstract]
Subsequent events	12. Subsequent events On October 28, 2011, the Company announced a cash dividend of $0.11 per share (totaling $1.5 million) payable on November 25, 2011 to Class A and Class B Stockholders of record on November 11, 2011.