Description Of Business And Segment Reporting (Reconciliation To Net Income Attributable To Common Shareholders) (Details) $ in Thousands, NZD in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)		Sep. 30, 2017 NZD	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Operating income	$ 3,638	$ 6,610	[1]		$ 16,929	$ 17,392	[1]
Depreciation and amortization expense	(4,137)	(4,131)	[1]		(12,124)	(11,766)	[1]
General and administrative expense	(5,840)	(6,175)	[1]		(18,131)	(18,372)	[1]
Income tax benefit (expense)	(742)	(1,328)	[1]		(8,291)	(4,222)	[1]
Equity earnings of unconsolidated joint ventures	136	200	[1]		654	808	[1]
Gain on sale of assets					9,417	393	[1]
Gain on insurance recoveries				NZD 12.7	9,217
Other income (expense)	89	(12)	[1]		937	(115)	[1]
Income before income taxes	2,200	5,245	[1]		31,844	13,288	[1]
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	8,252	11,481			31,181	32,380
Corporate, Non-segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	(108)	(102)			(321)	(295)
General and administrative expense	(4,506)	(4,769)			(13,931)	(14,693)
Interest expense, net	(1,663)	(1,553)			(5,310)	(5,190)
Equity earnings of unconsolidated joint ventures	136	200			654	808
Gain on sale of assets					9,417	393
Gain on insurance recoveries					9,217
Other income (expense)	$ 89	$ (12)			$ 937	$ (115)

[1] Certain 2016 balances have been reclassified to conform to the 2017 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).