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Contract Assets and Liabilities (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Contract assets | $ 59,244 |  | $ 59,244 |  |
Increase decrease in contract assets | (13,877) |  | (11,761) |  |
Increase decrease in contract liabilities |  |  | 3,500 |  |
Revenue recognized |  |  | 1,000 |  |
Accounts Receivable [Member] |  |  |  |  |
Contract assets | $ 47,400 |  | $ 47,400 |  |

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

X
- Definition The increase (decrease) during the period in the carrying value of contract assets reported as assets that are due to be disposed of within one year (or the normal operating cycle, if longer). + References No definition available. + Details
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Namespace Prefix: | ain_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase (decrease) during the period in the carrying value of contract liabilities reported as assets that are due to be disposed of within one year (or the normal operating cycle, if longer). + References No definition available. + Details
Name: | ain_IncreaseDecreaseInContractLiabilities
Namespace Prefix: | ain_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. + References No definition available. + Details
Name: | us-gaap_DeferredRevenueRevenueRecognized1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |