Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2024	Apr. 10, 2025	Jun. 30, 2024
Document Information [Line Items]
Entity Central Index Key	0000894081
Entity Registrant Name	Air Transport Services Group, Inc.
Amendment Flag	true
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	000-50368
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1631624
Entity Address, Address Line One	145 Hunter Drive
Entity Address, City or Town	Wilmington
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45177
City Area Code	937
Local Phone Number	382-5591
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	ATSG
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 619,722,308
Entity Common Stock, Shares Outstanding		66,226,796
Amendment Description	This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends the Annual Report on Form 10-K for the fiscal year ended December 31, 2024 of Air Transport Services Group, Inc. (“ATSG”), filed with the Securities and Exchange Commission (the “SEC”) on March 3, 2025 (the “Original Filing,” and together with this Amendment, the “Form 10-K”). We are filing this Amendment pursuant to General Instruction G(3) of Form 10-K to include the information required by Part III of Form 10-K that we did not include in the Original Filing, as we do not intend to file a definitive proxy statement for an annual meeting of shareholders within 120 days of the end of our fiscal year ended December 31, 2024 in light of the Merger (as defined below). In addition, in connection with the filing of this Amendment and pursuant to the rules of the SEC, we are including with this Amendment new certifications of our principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Item 15 of Part IV has also been amended to reflect the filing of these new certifications. Except as described above, no other changes have been made to the Original Filing. The Original Filing continues to speak as of the date of the Original Filing, and we have not updated the disclosures contained therein to reflect any events which occurred at a date subsequent to the filing of the Original Filing. As previously announced, on April 11, 2025, ATSG was acquired by Stonepeak Nile Parent LLC, a Delaware limited liability company (“Parent”) pursuant to that Agreement and Plan of Merger dated as of November 3, 2024 (the “Merger Agreement”) by and among ATSG, Parent, and Stonepeak Nile MergerCo Inc., a Delaware corporation and wholly-owned subsidiary of Parent (“MergerCo”), whereby MergerCo merged with and into the Company (the “Merger”). This Amendment does not address events occurring after the Merger and the disclosures contained herein relate to the Company prior to the closing of the Merger. This Amendment should be read in conjunction with the Original Filing and with our filings with the SEC subsequent to the Original Filing. On April 11, 2025, as a result of the consummation of the Merger and per our request, the Nasdaq Stock Market LLC filed a Form 25 with the SEC to voluntarily delist our common stock. We will file a Form 15 with the SEC to effect the deregistration of our common stock under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Upon the filing of the Form 15, our obligations to file certain reports with the SEC, including reports on Forms 10-K, 10-Q and 8-K, will immediately be suspended. Prior to the filing of such Form 15, SEC rules and regulations require ATSG to first file this Amendment in order to complete the Original Filing and be current in its Exchange Act reporting obligations. After the filing of this Amendment, ATSG no longer intends to file any reports with the SEC under the Exchange Act.
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Cincinnati, Ohio

Air Transport Services Group, Inc. 10-K/A