| Component: (Network and Table) | |
|---|---|
| Network | 183 - Disclosure - Restructuring, Asset Impairment and Transition Expenses - Summary of Total Restructuring Expense (Detail) (http://altramotion.com/taxonomy/role/DisclosureRestructuringAssetImpairmentAndTransitionExpensesSummaryOfTotalRestructuringExpense) |
| Table | Schedule of Restructuring and Related Costs [Table] |
| Reporting Entity [Axis] | 0001374535 (http://www.sec.gov/CIK) |
| Legal Entity [Axis] | Entity [Domain] |
| Restructuring Cost and Reserve [Line Items] | Period [Axis] | ||||
|---|---|---|---|---|---|
2012-01-01 - 2012-12-31 | 2011-01-01 - 2011-12-31 | 2010-01-01 - 2010-12-31 | |||
| Restructuring Plan [Axis] | Restructuring Plan [Axis] | Restructuring Plan [Axis] | |||
| Two Thousand Twelve Altra Plan [Member] | Restructuring Plan [Domain] | Restructuring Plan [Domain] | Two Thousand Nine Altra Plan [Member] | Restructuring Plan [Domain] | |
Expenses | |||||
Moving and relocation | 55,000 | xsi:nil | 455,000 | ||
Severance | 2,934,000 | xsi:nil | 1,192,000 | ||
Other | 207,000 | xsi:nil | 738,000 | ||
Total cash expenses | 3,196,000 | xsi:nil | 2,385,000 | ||
Loss on disposal of fixed assets | xsi:nil | xsi:nil | 341,000 | ||
Total restructuring expenses | 3,196,000 | 3,196,000 | xsi:nil | 2,726,000 | 2,726,000 |