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Income Taxes - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 22, 2017
Dec. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Income Tax Contingency [Line Items]                
Income taxes paid           $ 53,866,000 $ 28,044,000 $ 45,332,000
Blended rate         21.00% 31.55% 35.00% 35.00%
Impact of Tax Act     $ 4,106,000 $ 77,347,000 $ (13,483,000) $ 83,400,000 $ 0  
Provisional Transition Tax liability $ 97,500,000              
Tax Act - Transition Tax     7,800,000   5,290,000 7,800,000    
Tax Act - Transition Tax     89,700,000   55,489,000 89,700,000    
Net operating loss carryforwards carried forward indefinitely         102,792,000      
Net operating loss carryforwards subject to expiration         (66,114,000)      
Valuation allowance     15,255,000   17,519,000 15,255,000    
Income Tax Expense (Benefit)   $ (13,483)     $ (21,584,000) $ (118,493,000) $ (54,472,000)  
Effective income tax rates           11.90% 49.70% 25.60%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent         12.30% 5.20% 13.50%  
Income (Loss) from Continuing Operations before Income Taxes, Foreign         $ 128,872,000 $ 163,886,000 $ 132,259,000  
Undistributed earnings of foreign subsidiaries     1,167,000,000     1,167,000,000 $ 1,260,000,000  
Estimated change in unrecognized tax benefit in fiscal 2015         2,275,000      
Tax related interest and penalties         $ 75,000 $ 116,000    
Tax Rate of Swiss Subsidiary         4.00% 8.00% 5.00%  
Income tax expense (benefit)         $ 13,483,000      
Domestic Tax Authority                
Income Tax Contingency [Line Items]                
Increase (decrease) in tax rate         2.20%      
Foreign                
Income Tax Contingency [Line Items]                
United States federal net operating loss carryforwards         $ 168,906,000      
Valuation allowance     13,730,000   15,594,000 $ 13,730,000    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount         1,864,000      
Income Tax Expense (Benefit)         $ 2,876,000      
Increase (decrease) in tax rate         (0.90%)      
Federal                
Income Tax Contingency [Line Items]                
United States federal net operating loss carryforwards         $ 1,438,000      
Net operating loss carryforwards subject to expiration         630,000      
Valuation allowance     630,000   1,027,000 630,000    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount         397,000      
State                
Income Tax Contingency [Line Items]                
United States federal net operating loss carryforwards         33,900,000      
Valuation allowance     $ 895,000   898,000 $ 895,000    
Foreign Currency Translation Adjustment And Offset Adjustment To Net Operating Losses | Foreign                
Income Tax Contingency [Line Items]                
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount         1,012,000      
Alpha | Federal                
Income Tax Contingency [Line Items]                
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount         $ 1,027,000