Income Taxes - Valuation Allowance for Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 64,477	$ 58,658
Deferred Tax Assets, Valuation Allowance	5,800	112,700
Change in U.S. valuation allowance		67,800
Change in net deferred income tax asset (liability)
Deferred Other Tax Expense (Benefit)	399
Deferred income taxes related to continuing operations	(24,329)
Deferred income taxes related to other comprehensive income	4,030
Foreign currency translation	(1,152)
Balance at the end of the period	27,166	48,218
Valuation Allowance for Deferred Tax Assets
Valuation Allowance [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired	6,547
Annual activities included in the deferred tax valuation allowance
Balance at the beginning of the period	58,658	171,401	$ 163,898
Charge (benefit) to costs and expenses	(658)	(112,080)	8,647
Deductions	(70)	(663)	(1,144)
Balance at the end of the period	64,477	58,658	$ 171,401
Foreign Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	41,000
Deferred Tax Assets, Valuation Allowance		44,900
Domestic Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 23,500
Changes In Temporary Differences And Net Operating Utilizations Of Deferred Tax Assets [Member] | Foreign Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance		(35,500)
Release Of Valuation Allowance Of Deferred Tax Assets [Member] | Foreign Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance		(5,500)
Release Of Valuation Allowance Of Deferred Tax Assets [Member] | Domestic Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance		(44,200)
Operating Loss Carryforwards Of Deferred Tax Assets [Member] | Domestic Tax Authority [Member]
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance		$ (26,900)