Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Mar. 31, 2014
Treasury stock, shares	1,986,626us-gaap_TreasuryStockShares	609,625us-gaap_TreasuryStockShares
Common stock, Class A
Common stock, par value	0.01	0.01
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	149,895,153	143,962,073
Common stock, shares outstanding	147,908,527	143,352,448
Non-voting common stock, Class B
Common stock, par value	0.01	0.01
Common stock, shares authorized	16,000,000	16,000,000
Common stock, shares issued	0	582,080
Common stock, shares outstanding	0	582,080
Restricted common stock, Class C
Common stock, par value	0.01	0.01
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	0	935,871
Common stock, shares outstanding	0	935,871
Special voting common stock, Class E
Common stock, par value	0.003	0.003
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	1,851,589	4,424,814
Common stock, shares outstanding	1,851,589	4,424,814

Face amount or stated value per share of common stock.

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