Earnings (Loss) Per Common Share - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share and Other Significant Changes in Shares [Line Items]
Amount of shares repurchased (shares)	0
Amount of shares issued (shares)	327,072	84,467
Amount of shares issued	$ 2.8	$ 0.4
Employee Stock Option [Member]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share and Other Significant Changes in Shares [Line Items]
Weighted average shares outstanding excludes anti-dilutive shares underlying options (shares)	1,100,000	3,200,000
Restricted Stock Units (RSUs) [Member]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share and Other Significant Changes in Shares [Line Items]
Weighted average shares outstanding excludes anti-dilutive shares underlying options (shares)	400,000	2,000,000