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Investments - Summarized Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Income Statement [Abstract] |  |  |  |  |  |  |  |  |
Revenue |  | $ 78,075 | $ 66,472 | $ 146,892 | $ 127,597 |  |  |  |
Expenses |  | 68,590 | 67,646 | 162,512 | 129,943 |  |  |  |
Income (loss) from operations |  | 9,485 | (1,174) | (15,620) | (2,346) |  |  |  |
Statement of Financial Position [Abstract] |  |  |  |  |  |  |  |  |
Total assets | [1] | 2,396,383 |  | 2,396,383 |  |  | $ 2,462,927 |  |
Total liabilities | [2] | 1,971,642 |  | 1,971,642 |  |  | 2,037,237 |  |
Total shareholders’ equity |  | 374,894 | 368,689 | 374,894 | 368,689 | $ 371,007 | 375,885 | $ 372,412 | $ 364,015
WMES |  |  |  |  |  |  |  |  |
Income Statement [Abstract] |  |  |  |  |  |  |  |  |
Revenue |  | 21,185 | 4,885 | 30,726 | 9,646 |  |  |  |
Expenses |  | 17,687 | 6,606 | 32,690 | 12,775 |  |  |  |
Income (loss) from operations |  | 3,498 | $ (1,721) | (1,964) | $ (3,129) |  |  |  |
Statement of Financial Position [Abstract] |  |  |  |  |  |  |  |  |
Total assets |  | 285,114 |  | 285,114 |  |  | 310,260 |  |
Total liabilities |  | 202,735 |  | 202,735 |  |  | 225,917 |  |
Total shareholders’ equity |  | $ 82,379 |  | $ 82,379 |  |  | $ 84,343 |  |
[1] | Total assets at June 30, 2022 and December 31, 2021, respectively, include the following assets of variable interest entities (“VIEs”) that can only be used to settle the liabilities of the VIEs: Restricted cash $60,982 and $81,312; Equipment $1,205,623 and $1,226,395; Maintenance Rights $5,433 and $5,433; Inventory $0 and $4,367; Notes receivable $81,621 and $90,868; and Other assets $5,519 and $4,775, respectively.
[2] | Total liabilities at June 30, 2022 and December 31, 2021, respectively, include the following liabilities of VIEs for which the VIEs’ creditors do not have recourse to Willis Lease Finance Corporation: Debt obligations $1,160,849 and $1,197,922, respectively.

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