-- None. No documentation exists for this element. --

No definition available.

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- Definition

Number Of Reporting Units Carrying Goodwill

+ References

No definition available.

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- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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-Subparagraph (b)

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

+ References

No definition available.

+ Details

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit.

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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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-Publisher FASB

-Name Accounting Standards Codification

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Goodwill and Intangible Assets (Narratives) (Details) (USD $)	12 Months Ended
	Mar. 31, 2015 Reporting_Unit	Mar. 31, 2014 Reporting_Unit	Mar. 31, 2013	Mar. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Number of reporting units	4us-gaap_NumberOfReportingUnits	5us-gaap_NumberOfReportingUnits
Number of reporting units carrying goodwill	2	3
Goodwill	$ 121,461,000us-gaap_Goodwill	$ 119,303,000us-gaap_Goodwill	$ 105,354,000us-gaap_Goodwill
Duff Norton reporting unit goodwill	9,563,000cmco_DuffNortonReportingUnitGoodwill	9,865,000cmco_DuffNortonReportingUnitGoodwill
Rest of products reporting unit goodwill	111,898,000	102,458,000
Accumulated impairment losses for Goodwill	107,000,000	107,000,000
Impairment charges related to goodwill or intangible assets	0	0		0
2016	2,200,000
2017	2,200,000
2018	2,200,000
2019	2,200,000
2020	2,200,000
Weighted-average amortization periods	17 years
Indefinite lived trademark	2,338,000us-gaap_IndefiniteLivedTrademarks	1,200,000us-gaap_IndefiniteLivedTrademarks
Amortization of intangibles	$ 2,266,000us-gaap_AmortizationOfIntangibleAssets	$ 1,981,000us-gaap_AmortizationOfIntangibleAssets	$ 1,981,000us-gaap_AmortizationOfIntangibleAssets
Trademark
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization periods	18 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization periods	11 years
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization periods	25 years
Other
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization periods	11 years