Property Acquired, Property Sold, Property Held For Sale, Property Held For And Under Development, And Property And Equipment (Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Property Acquired, Property Sold, Property Held For Sale, Property Held For And Under Development, And Property And Equipment [Abstract]
Land	$ 63,692	$ 62,873
Building and improvements	138,611	134,967
Leasehold interests	42,137	40,855
Construction-in-progress	2,147	525
Fixtures and equipment	107,122	103,872
Total cost	353,709	343,092
Less: accumulated depreciation	(152,766)	(139,312)
Property and equipment, net	$ 200,943	$ 203,780