Earnings (Loss) Per Share of Common Stock (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net earnings (loss) from continuing operations	$ (6.3)		$ 5.3		$ (19.5)	$ (11.3)
Net earnings from discontinued operations	0.0		9.4		0.0	9.3
Net earnings (loss)	$ (6.3)	$ (13.2)	$ 14.7	$ (16.7)	$ (19.5)	$ (2.0)
Denominator
Weighted average number of common shares outstanding (in shares)	21,574,595		25,602,519		21,551,024	25,726,288
Weighted average number of vested shares not yet issued (in shares)	346,845		455,263		331,987	628,845
Weighted average number of common shares outstanding - Basic (in shares)	21,921,440		26,057,782		21,883,011	26,355,133
Dilutive stock-based compensation awards outstanding (in shares)	0		81,701		0	0
Weighted average number of common shares outstanding - Diluted (in shares)	21,921,440		26,139,483		21,883,011	26,355,133
Stock compensation performance awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share (in shares)	1,016,278		411,360		1,038,705	425,718
Performance awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share (in shares)	175,174		344,440		177,839	426,753

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