Goodwill And Intangible Assets (Narrative) (Details)	6 Months Ended
	Jun. 30, 2017
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	30 years
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	45 years
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets estimated useful life	30 years