CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ INVESTMENT - Statement (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2013	Mar. 30, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of year		$ 94.2		$ 80.4	$ 94.2	$ 80.4	$ 158.8
Balance at the beginning of year (shares)		15,471,150			15,471,150
Balance at the beginning of year (shares)		172,685			172,685
Net (loss) earnings	(8.9)	(15.1)	(12.5)	(1.2)	(8.3)	9.5	(55.9)
Other comprehensive income (loss)					6.0	(1.5)	(21.6)
Vesting of restricted common stock					(2.2)	(0.4)	(2.7)
Exercise of stock options (shares)					74,430	143,652	28,928
Exercise of stock options					(0.3)	1.6	0.1
Warrants exercised (shares)					46,837	96,444	0
Share-based compensation expense					10.5	4.6	1.7
Balance at the end of year	99.9		94.2		99.9	94.2	80.4
Balance at the end of year (shares)	15,682,746		15,471,150		15,682,746	15,471,150
Balance at the end of year (shares)	263,145		172,685		263,145	172,685
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of year		0.1		0.1	0.1	0.1	0.1
Balance at the beginning of year (shares)		15,471,150		15,204,189	15,471,150	15,204,189	15,000,000
Vesting of restricted common stock (shares)					90,329	26,865	175,261
Exercise of stock options (shares)					74,430	143,652	28,928
Exercise of stock options					0.1
Warrants exercised (shares)					46,837	96,444
Balance at the end of year	0.2		0.1		0.2	0.1	0.1
Balance at the end of year (shares)	15,682,746		15,471,150		15,682,746	15,471,150	15,204,189
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of year		(9.5)		(3.1)	(9.5)	(3.1)	0
Balance at the beginning of year (shares)		172,685		74,950	172,685	74,950	0
Vesting of restricted common stock (shares)					29,457	8,032	62,332
Vesting of restricted common stock					(2.2)	(0.4)	(2.7)
Exercise of stock options (shares)					27,047	13,779	12,618
Exercise of stock options					(1.9)	(0.9)	(0.4)
Warrants exercised (shares)					33,956	75,924
Warrants exercised					(2.5)	(5.1)
Balance at the end of year	(16.1)		(9.5)		(16.1)	(9.5)	(3.1)
Balance at the end of year (shares)	263,145		172,685		263,145	172,685	74,950
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of year		189.1		176.9	189.1	176.9	174.7
Exercise of stock options					1.5	2.5	0.5
Warrants exercised					2.5	5.1
Share-based compensation expense					10.5	4.6	1.7
Balance at the end of year	203.6		189.1		203.6	189.1	176.9
Accumulated Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of year		(63.2)		(72.7)	(63.2)	(72.7)	(16.8)
Net (loss) earnings					(8.3)	9.5	(55.9)
Balance at the end of year	(71.5)		(63.2)		(71.5)	(63.2)	(72.7)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of year		(22.3)		(20.8)	(22.3)	(20.8)	0.8
Other comprehensive income (loss)					6.0	(1.5)	(21.6)
Balance at the end of year	$ (16.3)		$ (22.3)		$ (16.3)	$ (22.3)	$ (20.8)