Earnings (Loss) per Share - Reconciliations Between Basic and Diluted Loss Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Earnings Per Share [Abstract]
Net (loss) earnings	$ 4.6	$ 4.2	$ (50.2)	$ 0.6
Weighted average common shares outstanding (in shares)	15,671,819	15,386,600	15,576,327	15,361,118
Dilutive effect of common share equivalents (in shares)	428,098	462,376	0	493,785
Dilutive shares outstanding (in shares)	16,099,917	15,848,976	15,576,327	15,854,903
Basic earnings (loss) per share (in dollars per share)	$ 0.29	$ 0.27	$ (3.22)	$ 0.04
Diluted (loss) earnings per share (in dollars per share)	$ 0.29	$ 0.27	$ (3.22)	$ 0.04