Land, Buildings And Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Land, Buildings And Equipment [Abstract]
Land	$ 100,748,000	$ 107,906,000
Buildings and improvements	517,691,000	512,826,000
Equipment	223,548,000	222,606,000
Total	841,987,000	843,338,000
Less accumulated depreciation and amortization	481,841,000	459,941,000
Net land, buildings and equipment	360,146,000	383,397,000
Depreciation expense	34,500,000	35,100,000	37,000,000
Repairs and maintenance expense	$ 17,700,000	$ 18,500,000	$ 18,600,000