Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions		12 Months Ended
	Jul. 13, 2016 shares	Dec. 31, 2016 USD ($) shares	Jan. 02, 2016 USD ($) shares	Jul. 12, 2016 shares	Jan. 30, 2015 USD ($)	Dec. 11, 2013 USD ($)
Reverse Stock Split [Abstract]
Shares outstanding pre-split (shares) | shares	68,500,000
Shares outstanding (shares) | shares	8,500,000	8,553,000	8,484,000
Shares authorized pre-split (shares) | shares	120,000,000			100,000,000
Shares authorized (shares) | shares	15,000,000	15,000,000	12,500,000
Reverse stock split ratio	0.125
Interest and Debt Expense [Abstract]
Unamortized debt issuance costs		$ 18.1	$ 16.5
Amortization of debt issuance costs		9.0	10.1
Workers' Compensation Discount [Abstract]
Workers' compensation liability, undiscounted		12.1	12.3
Workers' compensation liability		$ 11.2	$ 11.4
Workers' compensation discount rate (percent)		2.00%	2.00%
Insurance Loss Reserves [Abstract]
Self insurance reserve		$ 3.2	$ 3.2
Advertising Costs [Abstract]
Advertising costs		3.7	3.2
Deferred Tax Assets [Abstract]
Current deferred tax asset		$ 3.4
Building and building improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		15 years
Building and building improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		45 years
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		10 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		15 years
Furniture and fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		3 years
Furniture and fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		10 years
Software and software development costs [Member]
Computer Software [Abstract]
Net capitalized computer software		$ 20.7	16.6
Software and software development costs [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		3 years
Software and software development costs [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, useful life (years)		7 years
ABL Facility due 2021 [Member] | Asset based lending facility [Member]
Interest and Debt Expense [Abstract]
Unamortized debt issuance costs		$ 3.6	$ 2.4		$ 1.3	$ 0.3