Investment in Affiliates, Investment Balance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 794	$ 92	$ 1,965	$ 144
Equity Method Investments	62,320		62,320		$ 59,074
RezPlot [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	(469)	(654)	(956)	(1,154)
Equity Method Investments	2,091		2,091		3,047
Sungenia JV [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	75	262	809	147	338
Equity Method Investments	27,071		27,071		26,890	$ 11,995
Equity Method Investment, Cumulative Translation Adjustment			(628)		2,180
Payments to Acquire Equity Method Investments			0		12,377
GTSC [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	1,416	700	2,597	1,460	3,944
Equity Method Investment, Fair Value Adjustment			(11)		(1,608)
Equity Method Investments	29,677		29,677		25,495	$ 18,488
Equity Method Investments, Initial Fair Value Adjustment			0		317
Equity Method Investment, Cash Contributions			10,876		19,030
Proceeds from Equity Method Investment, Distribution			(9,280)		(14,676)
Origen Financial Services [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	97	42	126	80
Equity Method Investments	278		278		152
SV Lift [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	(325)	$ (258)	(611)	$ (389)
Equity Method Investments	$ 3,203		$ 3,203		$ 3,490