CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 443	$ 995
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	200,000,000	200,000,000
Shares, Outstanding	135,927,000	134,602,000
Common Stock, Shares, Outstanding	113,506,000	112,181,000
Treasury Stock, Shares	22,421,000	22,421,000