Intangibles - Intangibles Lease Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Intangibles [Abstract]
Gross intangible lease assets	$ 823,362	$ 761,328
Accumulated depreciation and amortization	(303,027)	(241,411)
Intangible assets, net	$ 520,335	$ 519,917
Weighted average remaining amortization period in years	6 years	5 years
Intangible assets, net		$ 25,000