Share-Based Compensation - Summary of Share Option Activity (Details)	9 Months Ended
	Dec. 31, 2016 $ / shares shares
Number of Options
Outstanding at beginning of period (in shares) | shares	5,820,413
Granted (in shares) | shares	177,666
Exercised (in shares) | shares	(757,995)
Canceled/forfeited (in shares) | shares	(155,746)
Outstanding at end of period (in shares) | shares	5,084,338
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 28.41
Granted (in dollars per share) | $ / shares	49.88
Exercised (in dollars per share) | $ / shares	10.49
Canceled/forfeited (in dollars per share) | $ / shares	73.74
Outstanding at end of period (in dollars per share) | $ / shares	$ 30.44