Borrowings (Australian NAB Corporate Term Loan (AU)) (Narrative) (Details) - 12 months ended Dec. 31, 2023 $ in Millions, $ in Millions	USD ($)	AUD ($)
Australian NAB Corporate Loan Facility Tier 3 [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100.0
Spread on variable interest rate	1.75%
Australian NAB Corporate Loan Facility Tier 3 [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 60.0
Australian NAB Corporate Loan Facility Tier 3 [Member] | Core Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 40.0
Australian NAB Bank Guarantee Facility Tier 3 [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 5.0
Spread on variable interest rate	1.90%
Maturity date	Jul. 31, 2025