Property Acquired, Property Sold, Property Held For Sale, Property Held For And Under Development, And Property And Equipment (Schedule Of Operations For Indooroopilly) (Details)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 Indooroopilly Property [Member] USD ($)	Sep. 30, 2011 Indooroopilly Property [Member] USD ($)	Sep. 30, 2012 Indooroopilly Property [Member] USD ($)	Sep. 30, 2011 Indooroopilly Property [Member] USD ($)	Sep. 30, 2012 Indooroopilly Property [Member] AUD
Revenue	$ 63,934,000	$ 66,554,000	$ 189,313,000	$ 187,558,000	$ 210,000	$ 207,000	$ 627,000	$ 619,000
Less: operating expense	59,777,000	59,538,000	174,666,000	171,388,000	168,000	152,000	465,000	449,000
Less: impairment expense					283,000		283,000		272,000
Income (loss) from discontinued operations, net of tax	$ (241,000)	$ 55,000	$ (121,000)	$ 170,000	$ (241,000)	$ 55,000	$ (121,000)	$ 170,000