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Equipment Held for Operating Lease - Narrative (Details) $ in Thousands | 12 Months Ended |  |
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Dec. 31, 2021 USD ($) region | Dec. 31, 2021 engine | Dec. 31, 2021 aircraft. | Dec. 31, 2021 marineVessel | Dec. 31, 2020 USD ($) | Dec. 31, 2020 engine | Dec. 31, 2020 aircraft. | Dec. 31, 2020 marineVessel
Leases [Abstract] |  |  |  |  |  |  |  |
Net book value of equipment held for operating lease | $ 1,991,368 |  |  |  | $ 1,886,613 |  |  |
Net investment in lease, notes receivable | $ 115,500 |  |  |  | $ 158,700 |  |  |
Number of equipment pieces held for lease |  | 304 | 12 | 1 |  | 291 | 8 | 1
Number of geographic regions in which aircraft lessees are domiciled in | region | 7 |  |  |  |  |  |  |

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- Definition Amount, before allowance for credit loss, of net investment in sales-type and direct financing leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123420820&loc=SL77919306-209978 + Details
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