Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangibles assets	$ 572,000	$ 677,000	$ 1,200,000	$ 1,300,000
Amortization of acquired leases			$ 540,000	$ 406,000
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets estimated useful life (maximum years)			30
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets estimated useful life (maximum years)			45
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets estimated useful life (maximum years)			10