CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Statement of Financial Position [Abstract]
Trade accounts receivable, allowances	$ 37,777	$ 21,146
Inventories, reserves	17,382	12,227
Accumulated depreciation	258,177	242,138
Accumulated amortization	$ 77,783	$ 74,421
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	125,000,000	125,000,000
Common stock, issued shares (in shares)	28,152,000	27,999,000
Common stock, outstanding shares (in shares)	28,152,000	27,999,000