Share-based Compensation - SSARs Rollforward (Details) - Stock Settled Stock Appreciation Rights (SSARS) [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Rights Outstanding at Beginning of Period | shares	1,016,643
Number of Rights Granted | shares	691,364
Number of Rights Exercised | shares	(37,506)
Number of Rights, Forfeited | shares	(15,838)
Number of Rights Expired | shares	(9,775)
Number of Rights Outstanding at End of Period | shares	1,644,888
Number of Rights Exercisable at End of Period | shares	959,340
Number of Rights Vested and expected to vest at March 31, 2020 | shares	1,644,888
Weighted Average Exercise Price Outstanding at Beginning of Period | $ / shares	$ 11.22
Weighted Average Exercise Price, Granted | $ / shares	34.72
Weighted Average Exercise Price, Exercised | $ / shares	10.02
Weighted Average Exercise Price, Forfeited | $ / shares	18.09
Weighted Average Exercise Price, Expired | $ / shares	10.61
Weighted Average Exercise Price Outstanding at End of Period | $ / shares	21.07
Weighted Average Exercise Price, Exercisable at End of Period | $ / shares	11.79
Weighted Average Exercise Price, Exercisable at End of Period | $ / shares	$ 21.07
Remaining Contractual Term Outstanding at End of Period	4 years 10 months 24 days
Remaining Contractual Term Exercisable at End of Period	3 years 10 months 24 days
Share Based Compensation Arrangement By Share Based Payment Award Vested And Expected To Vest Outstanding Remaining Contractual Term	4 years 10 months 24 days
Aggregate Intrinsic Value Outstanding at End of Period | $	$ 5,236
Aggregate Intrinsic Value Exercisable at End of Period | $	5,130
Aggregate Intrinsic Value Exercisable at End of Period, Vested and expacted | $	$ 5,236