Insurance Recoveries (Schedule Of Net Impact In Current Earnings) (Details) NZD in Thousands, $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2017 USD ($)	Jun. 30, 2017 NZD	Jun. 30, 2017 USD ($)
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds			NZD 36,034
Recorded as of December 31, 2016			20,727
Changes in estimates and others			458
Total recorded values of recoverable components			21,185
Net Impact in Current Earnings			14,849	$ 10,741
Gain on insurance recoveries		$ 9,217	12,700	9,217
Non-Operating Income [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds			33,817
Recorded as of December 31, 2016			20,727
Changes in estimates and others			347
Total recorded values of recoverable components			21,074
Net Impact in Current Earnings			12,743	9,217
Property Damage [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds			29,093
Property Damage [Member] | Non-Operating Income [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds	[1]		29,093
Recorded as of December 31, 2016	[1]		13,451
Changes in estimates and others	[1]		347
Total recorded values of recoverable components	[1]		13,798
Net Impact in Current Earnings	[1]		15,295	11,063
Demolition Costs [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds			4,724
Demolition Costs [Member] | Non-Operating Income [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds	[1]		4,724
Recorded as of December 31, 2016	[1]		7,276
Total recorded values of recoverable components	[1]		7,276
Net Impact in Current Earnings	[1]		(2,552)	(1,846)
Business Interruption [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds			2,217
Business Interruption [Member] | Operating Income [Member]
Insurance Recoveries [Line Items]
Allocation of Insurance Proceeds	[2]		2,217
Changes in estimates and others	[2]		111
Total recorded values of recoverable components	[2]		111
Net Impact in Current Earnings	[2]		NZD 2,106	$ 1,523

[1] The net impact to current earnings of $9.2 million (NZ$12.7 million) is recorded as "Gain on Insurance Recoveries" in our Consolidated Statement of Income.

[2] The impact to current earnings of $1.5 million (NZ$2.1 million) is recorded as part of the applicable segment revenues in our Consolidated Statement of Income.