INCOME TAX (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Dec. 31, 2012
INCOME TAX
Anticipated effective tax rate for fiscal 2013 (as a percent)	39.50%
Reduction in tax expense due to retroactive reinstatement of the research and experimentation tax credit	$ 1.0

Represents the decrease in income tax expense (benefit) due to retroactive reinstatement of the research and experimentation tax credit.

No definition available.

Name:	acxm_DecreaseInIncomeTaxExpenseBenefitDueToRetroactiveReinstatementOfResearchAndExperimentationTaxCredit
Namespace Prefix:	acxm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration