Property And Equipment (Narrative) (Details) AUD in Millions				3 Months Ended				9 Months Ended
	Apr. 01, 2015 NZD property	May. 23, 2014 AUD	May. 23, 2014 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 AUD	Jun. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 AUD a	Sep. 30, 2015 USD ($) a	Apr. 30, 2015 NZD	Apr. 30, 2015 USD ($)	Apr. 16, 2015 AUD	Apr. 16, 2015 USD ($)	Apr. 01, 2015 USD ($)	Dec. 31, 2014 USD ($)
Depreciation expense for property and equipment				$ 3,300,000			$ 3,700,000	$ 10,100,000	$ 10,700,000
Carrying value of property											$ 170,259,000						$ 186,889,000
Lake Taupo [Member]
Number of land parcels sold | property	2
Sale price	NZD 3,400,000															$ 2,300,000
Lake Taupo Parcel One [Member]
Sale price												NZD 2,200,000	$ 1,490,000
Carrying value of property												1,800,000	1,300,000
Lake Taupo Parcel Two [Member]
Sale price												1,200,000	767,000
Carrying value of property												NZD 615,000	$ 393,000
Moonee Ponds [Member]
Sale price														AUD 23.0	$ 17,500,000
Gain (loss) on sale of assets					AUD 10.3	$ 8,000,000
Burwood [Member]
Sale price										AUD 65.0	47,000,000
Carrying value of property										AUD 52.1	$ 36,600,000
Area of Real Estate Property | a										50.6	50.6
Proceeds from Sale of Property Held-for-sale		AUD 6.5	$ 5,900,000
Sale agreements, prepayment as a percentage of net sale price										90.00%	90.00%