Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	MINISTRY PARTNERS INVESTMENT COMPANY, LLC
Entity Central Index Key	0000944130
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Well-known Seasoned Issuer	No
Entity a Voluntary Filer	No
Entity Current Reporting Status	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
Entity Public Float		$ 7,904,250