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Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Finance Lease - Allowance for doubtful accounts |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Beginning Balance | $ 0 | $ 0 | $ 527
Additions |  |  | (527)
(Reversals) | 0 | 0 |
(Write-offs)/ Reversals | 0 | 0 | 0
Ending Balance | 0 | 0 | 0
Accounts Receivable-Allowance for doubtful accounts: |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Beginning Balance | 1,240 | 3,002 | 28,082
Additions |  | (568) | 581
(Reversals) | 114 |  |
(Write-offs)/ Reversals | (78) | (1,194) | (25,661)
Ending Balance | $ 1,276 | $ 1,240 | $ 3,002

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- Definition Total of the (deductions) recoveries of amount in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References No definition available. + Details
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