Basis of Presentation (Details) $ in Millions			3 Months Ended
	Mar. 24, 2017 USD ($)	Dec. 01, 2015 store	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales			$ 355.2	$ 302.5
SARL Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Note receivable from disposition of SARL business	$ 3.3				$ 2.2
NATG
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of remaining stores | store		3
Financial obligations related to leased facilities, carrying value			46.0
Reserve for lease obligations			13.7
Lease obligations, fair value			46.0
Reversed lease reserves for leased facilities			$ 0.2
SARL Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of residual equity position retained	5.00%
Continuing Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reclassification of component of cost of sales to selling, distribution and administrative expenses				$ 11.0