(Loss) Earnings per Share - Reconciliations Between Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Earnings Per Share [Abstract]
Net (loss) earnings	$ (14.4)	$ 4.6	$ (30.6)	$ (50.2)
Weighted average common shares outstanding (in shares)	15,953,891	15,671,819	15,939,145	15,576,327
Dilutive effect of common share equivalents (in shares)	0	428,098	0	0
Dilutive shares outstanding (in shares)	15,953,891	16,099,917	15,939,145	15,576,327
Basic (loss) earnings per share (in dollars per share)	$ (0.90)	$ 0.29	$ (1.92)	$ (3.22)
Diluted (loss) earnings per share (in dollars per share)	$ (0.90)	$ 0.29	$ (1.92)	$ (3.22)