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Insurance Recoveries On Impairment And Related Losses Due To Earthquake (Schedule Of Net Impact In Current Earnings) (Details) $ in Thousands | 12 Months Ended | 24 Months Ended
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Dec. 31, 2017 NZD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 NZD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2017 USD ($)
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation |  | $ 36,034 |  | $ 36,034 |  |  |  |
Total expected incurred losses, November 30, 2016 |  |  |  | 22,746 |  |  |  |
Less: Casualty Losses recorded in 2016 Earnings |  |  |  | $ (2,019) | [1] | $ (1,421,000) |  |
Recoverable Assets, December 31, 2016 | [2] |  |  |  |  | $ 20,727,000 |  |
Add: Upward changes in estimates and others |  |  | $ 458,000 |  |  |  |  |
Net recoverable balances charged against proceeds |  |  | 21,185,000 |  |  |  |  |
Casualty gain, recorded in 2017 Earnings |  | 14,849 | 10,740,000 |  |  |  |  |
Net Casualty gain for 2016 and 2017 Earnings |  |  |  |  |  |  |  | $ 9,319,000
Deductible from casualty loss |  |  |  | 5.00% |  | 5.00% |  |
Gain on insurance recoveries |  | 12,700 | 9,217,000 |  |  | $ (1,421,000) | [3] |
Non-Operating Income [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation |  |  |  | $ 33,817 |  |  |  |
Total expected incurred losses, November 30, 2016 |  |  |  | 22,746 |  |  |  |
Less: Casualty Losses recorded in 2016 Earnings |  |  |  | (2,019) | [1] | (1,421,000) |  |
Recoverable Assets, December 31, 2016 | [2] |  |  |  |  | 20,727,000 |  |
Add: Upward changes in estimates and others |  |  | 347,000 |  |  |  |  |
Net recoverable balances charged against proceeds |  |  | 21,074,000 |  |  |  |  |
Casualty gain, recorded in 2017 Earnings |  | 12,743 | 9,217,000 |  |  |  |  |
Net Casualty gain for 2016 and 2017 Earnings |  |  |  |  |  |  |  | 7,796,000
Property Damage [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation |  | 29,093 |  |  |  |  |  |
Property Damage [Member] | Non-Operating Income [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation | [4] |  |  | 29,093 |  |  |  |
Total expected incurred losses, November 30, 2016 | [4] |  |  | 14,246 |  |  |  |
Less: Casualty Losses recorded in 2016 Earnings | [4] |  |  | (795) | [1] | (560,000) |  |
Recoverable Assets, December 31, 2016 | [2],[4] |  |  |  |  | 13,451,000 |  |
Add: Upward changes in estimates and others | [4] |  | 347,000 |  |  |  |  |
Net recoverable balances charged against proceeds | [4] |  | 13,798,000 |  |  |  |  |
Casualty gain, recorded in 2017 Earnings | [4] | 15,295 | 11,063,000 |  |  |  |  |
Net Casualty gain for 2016 and 2017 Earnings | [4] |  |  |  |  |  |  | 10,503,000
Demolition Costs [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation |  | 4,724 |  |  |  |  |  |
Casualty loss considered as income |  |  |  | 1,200 |  | 862,000 |  |
Demolition Costs [Member] | Non-Operating Income [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation | [4] |  |  | 4,724 |  |  |  |
Total expected incurred losses, November 30, 2016 | [4] |  |  | 8,500 |  |  |  |
Less: Casualty Losses recorded in 2016 Earnings | [4] |  |  | (1,224) | [1] | (861,000) |  |
Recoverable Assets, December 31, 2016 | [2],[4] |  |  |  |  | $ 7,276,000 |  |
Net recoverable balances charged against proceeds | [4] |  | 7,276,000 |  |  |  |  |
Casualty gain, recorded in 2017 Earnings | [4] | (2,552) | (1,846,000) |  |  |  |  |
Net Casualty gain for 2016 and 2017 Earnings | [4] |  |  |  |  |  |  | (2,707,000)
Business Interruption [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation |  | 2,217 |  |  |  |  |  |
Business Interruption [Member] | Operating Income [Member] |  |  |  |  |  |  |  |
Insurance Recoveries [Line Items] |  |  |  |  |  |  |  |
Insurance Proceed Allocation | [5] |  |  | $ 2,217 |  |  |  |
Add: Upward changes in estimates and others | [5] |  | 111,000 |  |  |  |  |
Net recoverable balances charged against proceeds | [5] |  | 111,000 |  |  |  |  |
Casualty gain, recorded in 2017 Earnings | [5] | $ 2,106 | $ 1,523,000 |  |  |  |  |
Net Casualty gain for 2016 and 2017 Earnings | [5] |  |  |  |  |  |  | $ 1,523,000
[1] | The casualty losses recorded in 2016 as a separate line in our Consolidated Statement of Operations is made up the following: (i) 5% deductible of $795,000 (NZ$560,000) calculated based on the estimated value of the insured damaged parking structure for insurance purposes, and (ii) $862,000 (NZ$1.2 million) of total estimated demolition costs was preliminarily assessed as expenses not reimbursable under our insurance policy and hence, we recorded in profit and loss.
[2] | The recoverable asset of $9.5 million (NZ$13.6 million), net of advance payment of $5.0 million (NZ$7.1 million), as of December 31, 2016 was presented as part of "Other non-current assets" as the timing of the insurance claim receipt was not fixed nor reliably determinable as of the time of our initial assessment.
[3] | Certain prior year balances have been reclassified to conform to the 2017 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).
[4] | The net impact to 2017 earnings of $9.2 million (NZ$12.7 million) is recorded as "Casualty gain" in our Consolidated Statement of Operations.
[5] | The impact to 2017 operating earnings of $1.5 million (NZ$2.1 million) is recorded as part of the applicable segment revenues in our Consolidated Statement of Operations.

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