Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Related Party Transaction [Line Items]
Accounts receivable, allowance for doubtful accounts	$ 2,066	$ 5,069
Related party prepaid expenses and other current assets	36,972	78,399
Related party accounts payable	$ 37,407	$ 43,969
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	300,000,000	150,000,000
Common stock, shares issued (in shares)	115,917,431	114,495,614
Common stock, shares outstanding (in shares)	92,041,288	94,088,469
Treasury stock (in shares)	23,876,143	20,407,145
Affiliated Entity
Related Party Transaction [Line Items]
Related party prepaid expenses and other current assets	$ 3,585	$ 44,161
Related party accounts payable	$ 444	$ 5,893