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Acquisitions, Disposals, And Assets Held For Sale (Narrative) (Details) AUD in Thousands |  |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |
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Feb. 25, 2016 USD ($) | Dec. 23, 2015 AUD ft² item property mi | Dec. 23, 2015 USD ($) ft² item property mi | Nov. 30, 2015 AUD ft² | Nov. 30, 2015 USD ($) ft² | Apr. 01, 2015 NZD property | May. 23, 2014 AUD | May. 23, 2014 USD ($) | Jun. 30, 2015 AUD | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Mar. 31, 2016 NZD | Mar. 31, 2016 USD ($) | Dec. 31, 2015 AUD | Dec. 31, 2015 USD ($) | Nov. 29, 2015 ft² | Apr. 30, 2015 NZD | Apr. 30, 2015 USD ($) | Apr. 16, 2015 AUD | Apr. 16, 2015 USD ($) | Apr. 01, 2015 USD ($) | May. 12, 2014 AUD a | May. 12, 2014 USD ($) a
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 33,598 | $ 24,349,000 |  |  |  |  |  |  |  |
Carrying value of property |  |  |  |  |  |  |  |  |  |  |  | $ 186,889,000 | [1] | $ 191,660,000 |  |  |  |  | 210,298,000 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | 21,281,000 | [1] | 22,159,000 |  |  |  |  | $ 19,715,000 |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  | $ 11,023,000 | 25,000 | [1] | (56,000) | [1] |  |  |  |  |  |  |  |  |  |  |  |
Australia Country Cinemas, Pty Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage by parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% | 75.00% |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% | 20.00% |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  |  |  |  |  | 35 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lake Taupo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of land parcels sold | property |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale price |  |  |  |  |  | NZD 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,300,000 |  |
Lake Taupo Parcel One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [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] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | NZD 1,200,000 | $ 821,000 |  |  |  |  |  |  |  |  |  |
Carrying value of property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | NZD 615,000 | $ 421,000 |  |  |  |  |  |  |  |  |  |
Property Adjacent To Newmarket [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of property | ft² |  |  |  | 23,000 | 23,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  | AUD 7,600 | $ 5,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Newmarket, Australia [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of property | ft² |  |  |  | 227,000 | 227,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 204,000 |  |  |  |  |  |  |
Cannon Park, Queensland [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of acquisition completed |  | 100.00% | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of land parcels acquired | property |  | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment to acquire property |  | AUD 33,600 | $ 24,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of property | ft² |  | 133,000 | 133,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distance between two properties, Miles | mi |  | 6.0 | 6.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of property leased |  |  |  |  |  |  |  |  |  |  | 98.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |
Cannon Park, Queensland [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  |  |  |  |  | 9 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cannon Park, Queensland [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  |  |  |  |  | 8 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cannon Park City Centre [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage by parent |  | 75.00% | 75.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of major tenants | item |  | 3 | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of specialty family oriented restaurant tenants | item |  | 10 | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cannon Park Discount Centre [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of retailers | item |  | 4 | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Burwood [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of property | a |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.6 | 50.6
Sale price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 65,000 | $ 47,500,000
Proceeds from the sale property |  |  |  |  |  |  | AUD 6,500 | $ 5,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 58,500 | 42,600,000 |  |  |  |  |  |  |  |
Sale agreements, prepayment as a percentage of net sale price |  |  |  |  |  |  |  |  |  |  | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 52,100 | $ 38,000,000 |  |  |  |  |  |  |  |
Plano Cinema [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the sale property |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition, liability incurred |  |  |  |  |  |  |  |  |  |  |  |  |  | 320,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  |  |  |  |  | $ 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain on acquisition and settlement |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Moonee Ponds [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 23,000 | $ 17,500,000 |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  | AUD 10,300 | $ 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Doheny Condo, Los Angeles [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions, Disposals, And Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale price | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of assets | $ 2,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Certain prior period amounts have been reclassified to conform to the current period presentation (see Note 2 - Significant Accounting Policies - Reclassifications).

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