Leases (Components of Lease Cost) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Finance lease cost
Amortization of right-of-use assets	$ 510
Interest expense on lease liabilities	123
Total lease cost	12,049
Cost of sales and merchandising revenues
Lease cost:
Operating lease cost	7,239
Operating, administrative and general expenses
Lease cost:
Operating lease cost	3,954
Finance lease cost
Other lease cost	199
Interest expense
Finance lease cost
Other lease cost	$ 24