Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 34,684	$ 31,827
Less: Accumulated amortization	(24,337)	(20,341)
Net intangible assets	10,347	11,486
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	26,738	24,150
Less: Accumulated amortization	(19,687)	(15,989)
Net intangible assets	7,051	8,161
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	7,254	7,254
Less: Accumulated amortization	(4,207)	(3,929)
Net intangible assets	3,047	3,325
Other Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	692	423
Less: Accumulated amortization	(443)	$ (423)
Net intangible assets	$ 249