CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Statement of Financial Position [Abstract]
Trade accounts receivable, allowances	$ 25,084	$ 21,146
Inventory reserves	17,759	12,227
Accumulated depreciation	237,898	242,138
Accumulated amortization	$ 75,305	$ 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)	28,005,000	27,999,000
Common stock, outstanding shares (in shares)	28,005,000	27,999,000