Share Based Awards - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, Outstanding, Beginning	3,670,170	2,885,415	2,447,286
Number of Shares, Granted	326,130	1,479,000	1,146,500
Number of Shares, Exercised	(375,645)	(216,405)
Number of Shares, Forfeited/Canceled	(451,730)	(477,840)	(708,371)
Number of Shares, Expired	(2,400)
Number of Shares, Outstanding, Ending	3,166,525	3,670,170	2,885,415	2,447,286
Vested and expected to vest, March 31, 2019	2,856,491
Exercisable, March 31, 2019	1,320,670
Weighted- Average Exercise Price per Share
Weighted-Average Exercise Price per Share, Outstanding, Beginning	$ 15.51	$ 15.41	$ 19.55
Weighted-Average Exercise Price per Share, Granted	16.40	14.56	11.30
Weighted-Average Exercise Price per Share, Exercised	15.49	16.62
Weighted-Average Exercise Price per Share, Forfeited/Cancelled	18.00	18.90	16.86
Weighted-Average Exercise Price per Share, Expired	28.15
Weighted-Average Exercise Price per Share, Outstanding, Ending	15.36	$ 15.51	$ 15.41	$ 19.55
Vested and expected to vest, March 31, 2018 (in dollars per share)	15.43
Exercisable, March 31, 2018 (in dollars per share)	$ 16.22
Weighted- Average Remaining Contractual Life (years)
Outstanding	5 years 6 months	6 years 2 months 12 days	6 years 2 months 12 days	6 years 3 months 18 days
Granted	6 years 9 months 18 days	7 years 6 months	7 years 2 months 12 days
Forfeited/Canceled	4 years 10 months 24 days	3 years 1 month 6 days	3 years 4 months 24 days
Exercised	4 years 8 months 12 days	5 years 9 months 18 days
Vested and expected to vest, March 31, 2019	5 years 6 months
Exercisable, March 31, 2019	4 years 8 months 12 days
Aggregate Intrinsic Value
Outstanding	$ 7,040	$ 766	$ 3,150	$ 574
Exercised	1,589	$ 119
Vested and expected to vest, March 31, 2019	6,352
Exercisable, March 31, 2019	$ 2,942