Property and Equipment (Narrative) (Details) $ in Thousands, $ in Thousands, a in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2023 USD ($) ft² a	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 AUD ($)	Sep. 30, 2022 USD ($)	Sep. 01, 2023 USD ($)	May 31, 2023 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation expense for operating property		$ 4,500	$ 4,900	$ 13,800		$ 15,500
Disposal Group, Not Discontinued Operations [Member] | 2483 Trenton Avenue Williamsport Pennsylvania [Member]
Property, Plant and Equipment [Line Items]
Acre Of Land Announced To Be Sold | a	26.6
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | 2483 Trenton Avenue Williamsport Pennsylvania [Member]
Property, Plant and Equipment [Line Items]
Book value	$ 460
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | 2483 Trenton Avenue Williamsport Pennsylvania [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Area of Land | ft²	18,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Culver City Los Angeles [Member]
Property, Plant and Equipment [Line Items]
Book value								$ 11,200
Sale price								$ 8,500
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maitland Centre New South Wales [Member]
Property, Plant and Equipment [Line Items]
Book value							$ 706
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Maitland Centre New South Wales [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Proceeds from sale of assets					$ 2,800