Details Of Certain Balance Sheet Accounts (Schedule Of Other Assets) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Details Of Certain Balance Sheet Accounts [Abstract]
Workers' compensation deposits	$ 700,000	$ 500,000
Health insurance deposits	1,200,000	1,200,000
Other miscellaneous deposits	1,200,000	1,800,000
Deferred financing fees	2,200,000	3,800,000
Investment in unconsolidated joint ventures	6,400,000	6,100,000
Other	12,600,000	9,100,000
Other assets, Total	$ 24,322,000	$ 22,454,000