Contract Assets and Liabilities (Narrative) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($)
Contract Assets And Liabilities
Increase in contract assets	$ 10,000
Increase in contract liabilities	5,800
Revenue recognized	$ 3,200

No definition available.

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Balance Type:	na
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- Definition

Increase in contract assets primarily due to an increase in unbilled revenue related to the satisfaction of performance obligations, in excess of the amounts billed to customers.

+ References

No definition available.

+ Details

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

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration