Annual report pursuant to Section 13 and 15(d)

Income Taxes - Valuation Allowance for Deferred Tax Assets (Details)

v3.20.1
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)