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		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Net (loss) earnings	$ 11.5	$ 18.5	$ (3.6)	$ 17.3
Weighted average common shares outstanding (in shares)	15,364,679	15,133,699	15,348,228	15,131,986
Dilutive effect of common share equivalents (in shares)	485,188	388,942	0	316,397
Dilutive shares outstanding (in shares)	15,849,867	15,522,641	15,348,228	15,448,383
Basic earnings (loss) per share	$ 0.75	$ 1.22	$ (0.23)	$ 1.14
Diluted earnings (loss) per share	$ 0.73	$ 1.19	$ (0.23)	$ 1.12