Net Periodic Benefit Cost (Narratives) (Details) (USD $)	3 Months Ended
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]
Planned contributions to pension plans in fiscal 2014	$ 11,000,000

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No definition available.

Name:	cmco_DefinedBenefitPlanExpectedContributionByEmployer
Namespace Prefix:	cmco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration