v3.26.1
Document and Entity Information
Apr. 08, 2026
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Apr. 08, 2026
Entity Registrant Name SUMISHO AIR LEASE CORP
Entity Incorporation State Country Code DE
Entity File Number 001-35121
Entity Tax Identification Number 27-1840403
Entity Address Address Line 1 2000 Avenue of the Stars
Entity Address Address Line 2 Suite 1000N
Entity Address City Or Town Los Angeles
Entity Address State Or Province CA
Entity Address Postal Zip Code 90067
City Area Code 310
Local Phone Number 553-0555
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001487712
Amendment Flag false
Class A Common Stock [Member]  
Entity Information [Line Items]  
Security 12b Title Class A Common Stock
Trading Symbol AL
Security Exchange Name NYSE
3.700% Medium-Term Notes, Series A, due April 15, 2030 [Member]  
Entity Information [Line Items]  
Security 12b Title 3.700% Medium-Term Notes, Series A, due April 15, 2030
Trading Symbol AL30
Security Exchange Name NYSE