Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Amortization of right-of-use assets	$ 202	$ 204
Interest on lease liabilities	63	79
Operating lease costs	747	778
Variable lease costs	108	86
Total lease costs	1,120	1,147
Solar Panel Leases
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Amortization of right-of-use assets	202	204
Interest on lease liabilities	63	79
Total lease costs	265	283
Ground Leases
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease costs	436	436
Variable lease costs	45	43
Total lease costs	481	479
Office, equipment, and vehicle leases
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease costs	311	342
Variable lease costs	63	43
Total lease costs	$ 374	$ 385