Document and Entity Information	9 Months Ended
	Sep. 30, 2020 shares
Document And Entity Information [Abstract]
Entity Registrant Name	MINISTRY PARTNERS INVESTMENT COMPANY, LLC
Entity Central Index Key	0000944130
Document Type	10-Q
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	146,522