Net Income (Loss) Per Share - Schedule of Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income (loss)	$ 18.3	$ 15.9	$ (13.8)	$ 8.1	$ 34.2	$ (5.7)
Denominator – Weighted-average common shares outstanding (in thousands):
Basic	15,974		15,899		15,957	15,883
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	109				133
Diluted	16,083		15,899		16,090	15,883
Net income (loss) per common share, Basic:	$ 1.14		$ (0.87)		$ 2.14	$ (0.36)
Net income (loss) per common share, Diluted:	$ 1.14		$ (0.87)		$ 2.12	$ (0.36)