Cover page - shares shares in Millions	3 Months Ended
	Mar. 31, 2021	Apr. 16, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2021
Entity File Number	1-10026
Entity Registrant Name	ALBANY INTERNATIONAL CORP.
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	216 Airport Drive
Entity Address, City or Town	Rochester
Entity Address, State or Province	NH
Entity Tax Identification Number	14-0462060
Entity Address, Postal Zip Code	03867
City Area Code	603
Local Phone Number	330-5850
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
Entity Shell Company	false
Entity Central Index Key	0000819793
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Class A
Entity Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $0.001 par value per share
Trading Symbol	AIN
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		30.7
Common Class B
Entity Information [Line Items]
Title of 12(b) Security	Class B Common Stock, $0.001 par value per share
Trading Symbol	AIN
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		1.6