Goodwill And Intangible Assets (Summary Of The Intangible Assets Subject To Amortization) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 32,007,000	$ 31,996,000
Less: Accumulated amortization	16,914,000	16,335,000
Total, net	15,093,000	15,661,000
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	24,294,000	24,284,000
Less: Accumulated amortization	13,335,000	12,873,000
Total, net	10,959,000	11,411,000
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,254,000	7,254,000
Less: Accumulated amortization	3,174,000	3,059,000
Total, net	4,080,000	4,195,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	459,000	458,000
Less: Accumulated amortization	405,000	403,000
Total, net	$ 54,000	$ 55,000