Subsequent Events (Narrative) (Details) $ in Thousands, $ in Millions				3 Months Ended				12 Months Ended
	May 07, 2021 USD ($)	May 07, 2021 NZD ($)	Dec. 29, 2016 USD ($)	Mar. 31, 2021 USD ($)		Mar. 31, 2021 NZD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Subsequent Event [Line Items]
Repayment of long-term borrowings				$ 42,552			$ 22,733
Contractual facility				248,072				$ 300,449
Westpac Bank Corporate Credit Facility [Member]
Subsequent Event [Line Items]
Contractual facility				$ 22,365	[1]	$ 32.0		23,021	[2]
Westpac Bank Corporate Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Repayment of long-term borrowings	$ 11,200	$ 16.0
Union Square Construction Financing [Member]
Subsequent Event [Line Items]
Contractual facility			$ 57,500					$ 50,000
Union Square Construction Financing [Member] | Subsequent Event [Member] | Emerald Creek Capital [Member]
Subsequent Event [Line Items]
Contractual facility	$ 55,000

[1] The contractual facilities and outstanding balances of the foreign currency denominated borrowings were translated into U.S. dollars based on the applicable exchange rates as of March 31, 2021.

[2] The contractual facilities and outstanding balances of the foreign currency denominated borrowings were translated into U.S. dollars based on the applicable exchange rates as of December 31, 2020.