Commitments and Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) lease_commitment
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Inventory Purchase Commitments	$ 5.5
Purchase Commitment [Member] | Future Retail Sites [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of future retail store lease commitments | lease_commitment	33
Future retail store leases, Rent Expense, Minimum Rentals	$ 96.0
Minimum [Member] | Purchase Commitment [Member] | Future Retail Sites [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future retail store lease commitments term	5 years
Maximum [Member] | Purchase Commitment [Member] | Future Retail Sites [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future retail store lease commitments term	15 years