Borrowings (Westpac Bank Corporate Credit Facility (NZ)) (Narrative) (Details) $ in Thousands, $ in Millions		6 Months Ended		12 Months Ended
	Aug. 13, 2024 NZD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 NZD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Contractual facility		$ 218,277		$ 218,159
Westpac Bank Corporate Credit Facility [Member]
Debt Instrument [Line Items]
Contractual facility		$ 8,437	$ 13.8	$ 8,775
Maturity date		Jan. 01, 2025	Jan. 01, 2025	Jan. 01, 2025
Interest rate		2.40%	2.40%
Westpac Bank Corporate Credit Facility [Member] | Bank Bill Swap Bid Rate [Member]
Debt Instrument [Line Items]
Interest rate		1.65%	1.65%
Subsequent Event [Member] | Westpac Bank Corporate Credit Facility [Member]
Debt Instrument [Line Items]
Increase in contractual facility amount	$ 5.0
Contractual facility	$ 18.8