Stockholders' Equity - LTIP NQSOs (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
2017 Long-Term Incentive Plan NQSOs | Employee Stock Option
Number of Shares
Number of shares outstanding beginning of period (in shares)	0
Granted (in shares)	208,000
Forfeited (in shares)	(16,000)
Number of shares outstanding end of period (in shares)	192,000	0
Weighted- Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 0.00
Granted (in dollars per share)	61.86
Forfeited (in dollars per share)	61.86
Outstanding at the end of the period (in dollars per share)	$ 61.86	$ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted- Average Remaining Contractual Term (Years)	9 years 4 days	0 years
Aggregate Intrinsic Value	$ 0	$ 0
Exercisable at the end of the period (in shares)	0
Exercisable (in dollars per share)	$ 0.00
Exercisable (in dollars)	$ 0
Exercisable (in years)	0 years
Stock Incentive Plan 2015 | Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Stock appreciation rights issued	0	0	0	0