Land, Buildings And Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	$ 897,111	$ 885,877
Less accumulated depreciation and amortization	544,530	528,006
Net land, buildings and equipment	352,581	357,871
Depreciation expense	30,100	29,800	$ 30,700
Repairs and maintenance expense	16,300	16,500	$ 16,800
Land [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	105,182	106,599
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	541,736	535,039
Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross land, buildings and equipment	$ 250,193	$ 244,239