Description Of Business And Segment Reporting (Reconciliation To Net Income Attributable To Common Shareholders) (Details) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 NZD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Operating income (loss)	$ 9,123	$ 23,624		$ 20,383
Depreciation and amortization expense	(22,747)	(22,275)		(16,942)
General and administrative expense	(25,395)	(27,337)		(25,347)
Equity earnings of unconsolidated joint ventures	792	974		815
(Loss) gain on sale of assets	(2)	(41)		9,360
Casualty gain (loss)			$ 12.7	9,217
Other (expense) income	325	(256)		588
Income (loss) before income taxes	2,334	17,464		34,169
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	28,470	45,305		40,803
Depreciation and amortization expense	(22,333)	(21,881)		(16,469)
Unallocated Corporate Expense [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	(414)	(394)		(473)
General and administrative expense	(18,933)	(21,287)		(19,947)
Interest expense, net	(7,904)	(6,837)		(6,194)
Equity earnings of unconsolidated joint ventures	792	974		815
(Loss) gain on sale of assets	(2)	(41)		9,360
Casualty gain (loss)				9,217
Other (expense) income	325	(256)		588
Income (loss) before income taxes	$ 2,334	$ 17,464		$ 34,169