Accounts Receivable (Schedule of Accounts Receivable) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 153,615	$ 149,752
Less allowances for discounts, returns and uncollectible accounts	(12,734)	(13,010)
Accounts receivable, net	140,881	136,742
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	152,832	148,339
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 783	$ 1,413