Notes Payable, Revolving Credit Facility, Interest and Amortization of Deferred Debt Costs - Interest Expense and Amortization of Deferred Debt Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Disclosure [Abstract]
Interest incurred	$ 13,019	$ 12,881
Amortization of deferred debt costs	373	384
Capitalized interest	(3,768)	(2,146)
Interest expense	9,624	11,119
Less: Interest income	30	52
Interest expense, net and amortization of deferred debt costs	$ 9,594	$ 11,067