Consolidated Balance Sheets Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Consolidated Balance Sheets Parentheticals [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 1.1	$ 1.1
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	5,000	5,000
Preferred Stock, Shares Issued	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	395,000	395,000
Common Stock, Shares, Issued	90,689	90,689
Common Stock, Shares, Outstanding	78,932	78,923
Treasury Stock, Shares	11,757	11,766