Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Receivables, provisions	$ 2.1	$ 1.7
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	7,000,000	7,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	38,329,897	38,329,897
Treasury stock at cost - Common stock, shares	212,500	212,500