Notes Payable - Amortization of Loan Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Deferred loan costs	$ 7,155	$ 7,082
Less:  deferred loan cost accumulated amortization	(3,401)	(2,303)
Total cost, net of accumulated amortization	$ 3,754	$ 4,779