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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Allowance for deferred tax asset |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 1,748 | $ 0 | $ 1,530
Charged to Expenses | 0 | 0 | 0
Adjustments to Valuation Accounts | 851 | 1,748 | (1,530)
Deductions | 0 | 0 | 0
Balance at End of Year | 2,599 | 1,748 | 0
Allowance for uncollectible accounts |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 11,408 | 7,921 | 5,920
Charged to Expenses | 46,844 | 4,402 | 2,532
Adjustments to Valuation Accounts | (12,844) | (915) | (531)
Deductions | 0 | 0 | 0
Balance at End of Year | 45,408 | 11,408 | 7,921
Allowance for notes receivable |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 0 | 0 | 0
Charged to Expenses | 250 | 0 | 0
Adjustments to Valuation Accounts | 0 | 0 | 0
Deductions | 0 | 0 | 0
Balance at End of Year | 650 | 0 | $ 0
Allowance for notes receivable | ASU 2019-05 |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | $ 400 |  |
Balance at End of Year |  | $ 400 |

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