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Pensions and Other Postretirement Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012
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United States |
Defined Benefit Plan Disclosure [Line Items] |
Accrued postretirement liability | $ 83.2
Canada |
Defined Benefit Plan Disclosure [Line Items] |
Accrued postretirement liability | $ 1.2
United States Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Percent of consolidated pension plan assets | 48.00%
Percent of consolidated pension plan obligations | 45.00%

X
- Definition Defined Benefit Plan, Weighted Average Pension Obligations. + References No definition available. + Details
Name: | ain_DefinedBenefitPlanWeightedAveragePensionObligations
Namespace Prefix: | ain_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Weighted Average Plan Assets. + References No definition available. + Details
Name: | ain_DefinedBenefitPlanWeightedAveragePlanAssets
Namespace Prefix: | ain_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the entity's obligation as of the balance sheet date under any other retirement plan(s), such as one or more defined contribution plans. + References No definition available. + Details
Name: | us-gaap_OtherPostretirementBenefitsPayableCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant