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Accounts Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross $ 161,752 $ 153,615
Less allowances for discounts, returns and uncollectible accounts (12,965) (12,734)
Accounts receivable, net 148,787 140,881
Trade accounts receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross 161,047 152,832
Other receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, gross $ 705 $ 783