Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax (benefit) expense at federal statutory rate	$ 2,335	$ (4,566)	$ 31,739
State and local income taxes net of federal tax (benefit) expense	(147)	0	1,210
Permanent tax differences	(1,846)	(2,499)	(224)
Temporary tax differences
Installment note on land sale	0	0	(2,875)
Allowance for losses on note receivables	(77)	(246)	(712)
Deferred gains	(878)	(1,920)	(7,041)
Basis differences on fixed assets	1,307	0	22,110
Other basis/timing differences	2,296	3,172	(766)
Generation (use) on net operating loss carryforwards	(3,137)	6,059	(42,231)
Reported tax (benefit) expense	$ (147)	$ 0	$ 1,210
Effective tax rate	4.70%	0.00%	0.70%