Taxes (Schedule of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Tax loss carryforwards	$ 157,648	$ 219,302
Tax credit carryforwards	1,584	1,656
Investment in partnerships	24,933	39,999
Other	28,070	38,362
Gross deferred tax assets	212,235	299,319
Valuation allowance	(82,825)	(83,704)
Total deferred tax assets	129,410	215,615
Deferred tax liabilities:
Plant and equipment	1,075	1,245
Convertible Notes		75
Other	4,311	4,825
Total deferred tax liabilities	5,386	6,145
Net deferred tax asset	$ 124,024	$ 209,470