Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amortization of right-of-use assets	$ 209	$ 621
Interest on lease liabilities	68	215
Operating lease costs	769	2,317
Variable lease costs	104	271
Total lease costs	1,150	3,424
Solar Panel Leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amortization of right-of-use assets	209	621
Interest on lease liabilities	68	215
Total lease costs	277	836
Ground Leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease costs	436	1,309
Variable lease costs	44	129
Total lease costs	480	1,438
Office, equipment, and vehicle leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease costs	333	1,008
Variable lease costs	60	142
Total lease costs	$ 393	$ 1,150