Leasing (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Leases [Abstract]
Description of lessee leasing arrangements, operating lease commitments	The Company leases certain office space, retail stores, property and equipment under long-term, non-cancelable operating leases. Most of these leases include renewal options and some include options to purchase, provisions for percentage rent based on sales and/or incremental step increase provisions.
Future minimum sublease income under non-cancelable subleases	$ 15.7