Business and Summary of Significant Accounting Policies (Schedule of Estimated Useful Lives) (Details)	12 Months Ended
	Dec. 31, 2017
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years