Goodwill And Intangible Assets (Summary Of The Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 32,176	$ 32,147
Less: Accumulated amortization	15,359	14,148
Total, net	16,817	17,999
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	24,499	24,471
Less: Accumulated amortization	12,154	11,238
Total, net	12,345	13,233
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,220	7,220
Less: Accumulated amortization	2,804	2,553
Total, net	4,416	4,667
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	457	456
Less: Accumulated amortization	401	357
Total, net	$ 56	$ 99