Entity wide revenue number of major customers.

No definition available.

Name:	aimc_EntityWideRevenueNumberOfMajorCustomers
Namespace Prefix:	aimc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Multiemployer plans, collective-bargaining arrangement, expiration.

+ References

No definition available.

+ Details

Name:	aimc_MultiemployerPlansCollectiveBargainingArrangementExpiration
Namespace Prefix:	aimc_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of collective bargaining agreements.

+ References

No definition available.

+ Details

Name:	aimc_NumberOfCollectiveBargainingAgreements
Namespace Prefix:	aimc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Sales payment due period from billing date maximum.

+ References

No definition available.

+ Details

Name:	aimc_SalesPaymentDuePeriodFromBillingDateMaximum
Namespace Prefix:	aimc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ConcentrationRiskLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employee participants subject to a collective bargaining arrangement to all participants in a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

Name:	us-gaap_MultiemployerPlansCollectiveBargainingArrangementPercentageOfParticipants
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=us-gaap_EuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollectiveBargainingArrangementAxis=aimc_CollectiveBargainingAgreementOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollectiveBargainingArrangementAxis=aimc_CollectiveBargainingAgreementTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollectiveBargainingArrangementAxis=aimc_CollectiveBargainingAgreementThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollectiveBargainingArrangementAxis=aimc_CollectiveBargainingAgreementFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Concentrations - Additional Information (Detail)	12 Months Ended
Concentrations - Additional Information (Detail)	Dec. 31, 2016 customer agreement	Dec. 31, 2015 customer	Dec. 31, 2014 customer
Concentration Risk [Line Items]
Sales contract payments due period	30 days
Percentage of labor force is represented by collective bargaining agreements	43.00%
Number of collective bargaining agreements \| agreement	4
United States [Member]
Concentration Risk [Line Items]
Percentage of labor force is represented by collective bargaining agreements	14.00%
Europe [Member]
Concentration Risk [Line Items]
Percentage of labor force is represented by collective bargaining agreements	72.00%
Agreement 1 [Member]
Concentration Risk [Line Items]
Collective bargaining agreements, expire date	Jun. 30, 2017
Agreement 2 [Member]
Concentration Risk [Line Items]
Collective bargaining agreements, expire date	Jul. 31, 2017
Agreement 3 [Member]
Concentration Risk [Line Items]
Collective bargaining agreements, expire date	Feb. 28, 2018
Agreement 4 [Member]
Concentration Risk [Line Items]
Collective bargaining agreements, expire date	Nov. 30, 2019
Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Number of customers representing over 10% of total sales \| customer	0	0	0
Maximum revenue percentage from any one customer	10.00%	10.00%	10.00%