Label	Element	Value
Prospectus [Line Items]	rr_ProspectusLineItems
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	May 31, 2019
Entity Registrant Name	dei_EntityRegistrantName	Jensen Quality Growth Fund Inc
Entity Central Index Key	dei_EntityCentralIndexKey	0000887215
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Sep. 27, 2019
Document Effective Date	dei_DocumentEffectiveDate	Sep. 30, 2019
Prospectus Date	rr_ProspectusDate	Sep. 30, 2019