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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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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%

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