Net Income (Loss) per Common Share (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restricted Stock [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Weighted average number of awards outstanding for computation of diluted earnings (loss) per share (in shares)	0.0	0.0	0.0	0.0
Weighted average number of awards outstanding excluded from the computation of diluted earnings (loss) per share (in shares)	0.0	0.0	0.0	0.0
Stock Option [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Weighted average number of awards outstanding for computation of diluted earnings (loss) per share (in shares)	0.0	0.0	0.0	0.0
Weighted average number of awards outstanding excluded from the computation of diluted earnings (loss) per share (in shares)	1.0	0.7	1.0	0.8