Significant Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Accounting Policies [Abstract]
Pre-tax cumulative effect of initial adoption of ASC 326, increase in credit loss reserves	$ 1.8
Effect of initial adoption of ASC 326, decrease in retained earnings	$ 1.4

Pre-tax cumulative effect of initial adoption of ASC 326, increase in credit loss reserves.

No definition available.

Name:	ain_PrecumulativeEffectOfInitialAdoptionOfAsc326IncreaseInCreditLossReserve
Namespace Prefix:	ain_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration