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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Entity Registrant Name dei_EntityRegistrantName HEARTLAND GROUP INC
Entity Central Index Key dei_EntityCentralIndexKey 0000809586
Document Creation Date dei_DocumentCreationDate Apr. 30, 2015
Document Effective Date dei_DocumentEffectiveDate May 01, 2015
Prospectus Date rr_ProspectusDate May 01, 2015