Investments In Unconsolidated Joint Ventures And Entities (Schedule Of Consolidated Balance Sheet And Statement Of Operations Data Of Unconsolidated Joint Ventures And Equity Method Investments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Current assets	$ 3,488	$ 5,245
Noncurrent assets	6,621	6,611
Current liabilities	2,197	3,031
Noncurrent liabilities	751	723
Members' equity	7,161	8,102
Total revenue	26,138	28,017	24,944
Net income	4,590	4,021	4,779
Mt. Gravatt [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	1,318	1,935
Noncurrent assets	4,078	3,832
Current liabilities	1,111	846
Noncurrent liabilities	43	60
Members' equity	4,242	4,861
Total revenue	15,236	14,097	12,909
Net income	$ 3,513	$ 3,045	$ 2,711