Share-based Compensation - Additional Information Related to Restricted Shares (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 4,376	$ 4,688	$ 2,427
Restricted Shares and Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued from treasury shares, net of shares withheld to cover applicable exercise price of award and to cover employee's minimum applicable income taxes (in shares)	197,917
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	47,146
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 2,803	2,594	1,770
Total fair value of restricted shares vesting	$ 4,383	$ 4,315	$ 1,182

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.

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