CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 11,450	$ 37,634
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	125,000,000	125,000,000
Common stock, issued	47,067,715	47,029,359