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Consolidated Balance Sheets (Parenthetical) - USD ($)
 3 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Preferred stock, shares authorized (shares) 15,000,000 15,000,000
Series A preferred stock    
Preferred stock, shares authorized (shares) 20 20
Preferred stock, dividend rate (percentage) 10.00% 10.00%
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares issued (shares) 7 7
Preferred stock, shares outstanding (shares) 7 7
Preferred stock, liquidation preference $ 3,648 $ 3,648
Class A common stock    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (shares) 210,000,000 210,000,000
Common stock, shares issued (shares) 77,266,774 77,178,494
Common stock, shares outstanding (shares) 74,494,334 77,075,614
Treasury stock, Class A shares (shares) 2,772,440 51,440
Class B common stock    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (shares) 1,241,000 1,241,000
Common stock, shares issued (shares) 1,241,000 1,241,000
Common stock, shares outstanding (shares) 0 0