Real Estate Transactions (Narrative) (Details) AUD in Millions												12 Months Ended
	Apr. 11, 2016 USD ($) ft² item	Feb. 25, 2016 USD ($)	Dec. 23, 2015 AUD ft² item mi	Dec. 23, 2015 USD ($) ft² item mi	Nov. 30, 2015 AUD ft²	Nov. 30, 2015 USD ($) ft²	Apr. 16, 2015 AUD	Apr. 16, 2015 USD ($)	Apr. 01, 2015 NZD property	May 23, 2014 AUD	May 23, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)		Dec. 31, 2014 USD ($)		Dec. 31, 2016 AUD	Dec. 31, 2016 USD ($)	Mar. 31, 2016 NZD	Mar. 31, 2016 USD ($)	Nov. 29, 2015 ft²	Apr. 30, 2015 NZD	Apr. 30, 2015 USD ($)	Apr. 16, 2015 USD ($)	Apr. 01, 2015 USD ($)	May 12, 2014 AUD a	May 12, 2014 USD ($) a
Property, Plant and Equipment [Line Items]
Carrying value of property													$ 210,298,000	[1],[2]				$ 211,886,000
Percent of leasable area	50.00%
Gain (loss) on sale of assets												$ 393,000	11,023,000	[3]	$ 25,000	[3]
Goodwill													$ 19,715,000	[1],[2]	$ 21,281,000			19,828,000
Minimum [Member]
Property, Plant and Equipment [Line Items]
Lease term												1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Lease term												35 years
5995 Sepulveda Blvd, Culver City [Member]
Property, Plant and Equipment [Line Items]
Sale price	$ 11,200,000
Area of property | ft²	24,000
Number of parking spaces | item	72
Burwood [Member]
Property, Plant and Equipment [Line Items]
Sale price																										AUD 65.0	$ 48,200,000
Remaining purchase price																	AUD 58.5	42,300,000
Carrying value of property																	AUD 52.1	$ 37,700,000
Area of property | a																										50.6	50.6
Proceeds from the sale property										AUD 6.5	$ 5,900,000
Sale agreements, prepayment as a percentage of net sale price												90.00%
Doheny Condo, Los Angeles [Member]
Property, Plant and Equipment [Line Items]
Sale price		$ 3,000,000
Gain (loss) on sale of assets		$ 2,800,000
Lake Taupo [Member]
Property, Plant and Equipment [Line Items]
Number of land parcels sold | property									2
Sale price									NZD 3,400,000																$ 2,400,000
Lake Taupo Parcel One [Member]
Property, Plant and Equipment [Line Items]
Sale price																						NZD 2,200,000	$ 1,600,000
Carrying value of property																						NZD 1,800,000	$ 1,300,000
Lake Taupo Parcel Two [Member]
Property, Plant and Equipment [Line Items]
Sale price																			NZD 1,200,000	$ 831,000
Carrying value of property																			NZD 615,000	$ 426,000
Moonee Ponds [Member]
Property, Plant and Equipment [Line Items]
Sale price							AUD 23.0																	$ 17,500,000
Gain (loss) on sale of assets							AUD 10.3	$ 8,000,000
Property Adjacent To Newmarket [Member]
Property, Plant and Equipment [Line Items]
Area of property | ft²					23,000	23,000
Total consideration					AUD 7.6	$ 5,500,000
Newmarket, Australia [Member]
Property, Plant and Equipment [Line Items]
Area of property | ft²					227,000	227,000															204,000
Cannon Park, Queensland [Member]
Property, Plant and Equipment [Line Items]
Area of property | ft²			133,000	133,000
Percentage of acquisition completed			100.00%	100.00%
Payment to acquire property			AUD 33.4	$ 24,100,000
Interest			75.00%	75.00%
Number of major tenants | item			3	3
Number of specialty family oriented restaurant tenants | item			10	10
Number of retailers | item			4	4
Distance between two properties, Miles | mi			6	6
Percentage of property leased												98.00%
Number of land parcels acquired | item			2	2
Cannon Park, Queensland [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Lease term												9 months
Cannon Park, Queensland [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Lease term												8 years

[1] Certain 2015 balances have been reclassified to conform to the 2016 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).

[2] Certain 2015 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).

[3] Certain 2015 and 2014 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).