Goodwill And Intangible Assets (Summary Of The Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 32,218	$ 32,147
Less: Accumulated amortization	15,997	14,148
Total, net	16,221	17,999
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	24,540	24,471
Less: Accumulated amortization	12,664	11,238
Total, net	11,876	13,233
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,220	7,220
Less: Accumulated amortization	2,930	2,553
Total, net	4,290	4,667
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	458	456
Less: Accumulated amortization	403	357
Total, net	$ 55	$ 99