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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Disclosure [Abstract]
Interest incurred	$ 12,481	$ 12,933	$ 38,062	$ 38,788
Amortization of deferred debt costs	425	402	1,237	1,163
Capitalized interest	(1,991)	(909)	(4,734)	(5,813)
Interest expense	10,915	12,426	34,565	34,138
Less: Interest income	1	28	6	127
Interest expense, net and amortization of deferred debt costs	$ 10,914	$ 12,398	$ 34,559	$ 34,011