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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Jun. 30, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Increase to reserves for loan losses | $ 1,700 |  |  |
Allowance for losses on net investment in leases at end of period | 11,113 | $ 10,937 |  | $ 0
Accrued interest | $ 3,600 |  |  | $ 4,200
ASU 2016-13 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Increase to reserves for loan losses |  |  | $ 3,300 |
Allowance for losses on net investment in leases at end of period |  |  | $ 9,100 |

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