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Contract Assets and Liabilities (Schedule of Contract Assets and Contract Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Contract Assets And Liabilities |  |
Contract assets | $ 56,100 |
Contract liabilities | $ 6,310 |

X
- References No definition available. + Details
Name: | ain_ContractAssetsAndLiabilitiesAbstract
Namespace Prefix: | ain_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current assets related to contracts. + References No definition available. + Details
Name: | ain_ContractAssetsCurrent
Namespace Prefix: | ain_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of current liabilities related to contracts. + References No definition available. + Details
Name: | ain_ContractLiabilitiesCurrent
Namespace Prefix: | ain_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant