Intangibles - Intangibles Lease Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Intangibles [Abstract]
Gross intangible lease liabilities	$ 153,624	$ 113,213
Accumulated depreciation and amortization	(45,593)	(38,222)
Intangible liabilities, net	$ 108,031	$ 74,991
Weighted average remaining amortization period in years	8 years	7 years