Share Repurchases Share Repurchases ( parenthetical) (Details) (August Two Thousand Eleven Authorization [Member], Class A Common Stock)	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
August Two Thousand Eleven Authorization [Member] \| Class A Common Stock
Payments for Repurchase of Equity [Abstract]
Treasury Stock, Shares, Acquired	0	0