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Stock Options and Incentive Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Prosperity Plus Savings Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Deferred compensation plan expense |  |  |  | $ 4.3 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember | $ 4.1 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember | $ 3.8 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember
Maximum percent of annual compensation which the Company can match |  |  |  | 5.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember |  |
Prosperity Plus Savings Plan [Member] | Minimum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Employee contribution, percent |  |  |  | 1.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Percent of employee contribution matched by the Company |  |  |  | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Prosperity Plus Savings Plan [Member] | Maximum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Employee contribution, percent |  |  |  | 15.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Percent of employee contribution matched by the Company |  |  |  | 100.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = us-gaap_PensionPlansDefinedBenefitMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Profit Sharing Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Deferred compensation plan expense |  |  |  | 1.5 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = ain_ProfitSharingPlanMember | 1.6 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = ain_ProfitSharingPlanMember | 1.8 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis = ain_ProfitSharingPlanMember
Stock Options [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Contractual term of stock options, in years |  |  |  | 20 years |  |
Length of time options are valid after retirement, in years |  |  |  | 10 years |  |
Aggregate intrinsic value of vested options |  |  |  | 3.5 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |
Aggregate intrinsic value of options exercised |  |  |  | 0.7 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 3.1 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember | 0.2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Long Term Incentive Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares of stock authorized for payment of awards |  |  |  | 343,183 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember |  |
Shares issued for long term incentive plan | 29,321 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember | 40,255 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember | 6,727 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember |  |  |
Cash payments in connection with long term incentive plan | 1.1 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember | 1.1 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember | 0.2 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember |  |  |
Deferred compensation expense |  |  |  | 2.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember | 2.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember | 2.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember
Vesting period |  |  |  | 3 years |  |
Additional share based compensation expense expected to be recognized in next twelve months |  |  |  | 0.4 ain_AdditionalShareBasedCompensationExpenseExpectedToBeRecognizedInNextTwelveMonths / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember |  |
Additional share based compensation expense expected to be recognized in two years |  |  |  | 0.4 ain_AdditionalShareBasedCompensationExpenseExpectedToBeRecognizedInTwoYears / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember |  |
Long Term Incentive Plan [Member] | Management [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares issued for long term incentive plan | 15,910 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 34,988 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 27,768 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |  |
Cash payments in connection with long term incentive plan | 1.4 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 2.0 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 1.5 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |  |
Deferred compensation expense |  |  |  | 2.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 2.3 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 3.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember
Long Term Incentive Plan [Member] | Management [Member] | Minimum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Earned incentive compensation paid in shares of Class A Common Stock |  |  |  | 40.00%ain_DeferredCompensationArrangementWithIndividualPercentPayableInCommonStock / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |
Long Term Incentive Plan [Member] | Management [Member] | Maximum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Earned incentive compensation paid in shares of Class A Common Stock |  |  |  | 50.00%ain_DeferredCompensationArrangementWithIndividualPercentPayableInCommonStock / us-gaap_AwardTypeAxis = ain_LongTermIncentivePlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |
Restricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Deferred compensation expense |  |  |  | 1.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 2.5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 1.9 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember
Compensation cost not yet recognized |  |  |  | 0.7 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |
Vesting period |  |  |  | 5 years |  |
Additional Restricted Stock Plan [Member] | Management [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Deferred compensation expense |  |  |  | 0.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_AdditionalRestrictedStockPlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 1.0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_AdditionalRestrictedStockPlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember | 0.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ain_AdditionalRestrictedStockPlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember
Compensation cost not yet recognized |  |  |  | 0.3 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = ain_AdditionalRestrictedStockPlanMember / us-gaap_TitleOfIndividualAxis = us-gaap_ManagementMember |  |
Phantom Stock Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Deferred compensation expense |  |  |  | 2.2 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PhantomShareUnitsPSUsMember | 1.5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PhantomShareUnitsPSUsMember | 0.5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PhantomShareUnitsPSUsMember
Compensation cost not yet recognized |  |  |  | $ 6.5 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_PhantomShareUnitsPSUsMember |  |
Vesting period |  |  |  | 5 years |  |
Compensation cost recognition period |  |  |  | 2 years |  |

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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