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Reportable Segments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 273,949		$ 255,374	$ 525,321	$ 478,977
Performance obligations	11,200		10,500	11,200	10,500
Remaining performance obligation expected to be recognized during 2019	6,400			6,400
Operating income	54,225		42,156	94,318	59,160
Albany Safran Composites, LLC [Member]
Segment Reporting Information [Line Items]
Net sales				116,300	88,400
Accounts receivable, unbilled receivables and contract receivables	91,100			91,100		$ 96,800
Machine Clothing [Member]
Segment Reporting Information [Line Items]
Net sales	155,016		161,784	299,349	303,557
Operating income	49,538		50,315	$ 93,781	$ 77,258
Machine Clothing [Member] \| Accounting Standards Update 2018-11 [Member]
Segment Reporting Information [Line Items]
Increase in assets						5,600
AEC assets [Member] \| Accounting Standards Update 2018-11 [Member]
Segment Reporting Information [Line Items]
Increase in assets						500
Corporate [Member] \| Accounting Standards Update 2018-11 [Member]
Segment Reporting Information [Line Items]
Increase in assets						$ 1,000
AEC [Member]
Segment Reporting Information [Line Items]
Operating income	$ 50,000	$ 600
Immaterial out-of-period favorable adjustment		$ 1,800	$ 1,600