Earnings per Common Share (Details) - Narrative - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Exclusion of interest and deferred financing fees from diluted income (in dollars)	$ 1.0	$ 3.2
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted net earnings per share (in shares)	3.6	0.9	0.7
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted net earnings per share (in shares)			13.5
Shares excluded from the computation of diluted net earnings per share (in dollars)			$ 5.8