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General - Narrative (Details)
12 Months Ended
Mar. 31, 2019
USD ($)
store
segment
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Restructuring Cost and Reserve [Line Items]      
Number of reportable segments | segment 6    
Money market funds $ 372,178,000 $ 268,976,000  
Asset retirement obligation 12,667,000 8,670,000  
Asset impairment charges 180,000 2,417,000 $ 13,222,000
Research and development costs 23,187,000 22,372,000 21,256,000
Advertising, marketing, and promotion expense 118,291,000 111,658,000 109,579,000
Prepaid advertising, marketing, and promotion expense $ 6,006,000 2,545,000  
Employer matching contribution percentage 50.00%    
Employer matching contribution, percent of employees' gross pay 6.00%    
Defined contribution plan cost $ 3,060,000 2,269,000 2,124,000
Facility Closing | Fiscal Year 2016 Restructuring Plan      
Restructuring Cost and Reserve [Line Items]      
Number of stores closed | store 46    
Direct-to-Consumer      
Restructuring Cost and Reserve [Line Items]      
Asset impairment charges $ 180,000 2,417,000 $ 11,265,000
Cloud Computing Arrangement      
Restructuring Cost and Reserve [Line Items]      
Prepaid hosting costs $ 0 $ 0  
Minimum      
Restructuring Cost and Reserve [Line Items]      
Property, plant and equipment useful life (at least) 1 year    
Minimum | Cloud Computing Arrangement      
Restructuring Cost and Reserve [Line Items]      
Hosting arrangement useful life 1 year    
Maximum      
Restructuring Cost and Reserve [Line Items]      
Derivative term of contract 15 months    
Maximum | Cloud Computing Arrangement      
Restructuring Cost and Reserve [Line Items]      
Hosting arrangement useful life 5 years    
Moreno Valley, CA | Building and Building Improvements      
Restructuring Cost and Reserve [Line Items]      
Liabilities incurred, asset retirement obligation $ 4,706,000