Document and Entity Information	3 Months Ended
	Mar. 31, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Trading Symbol	DTRPI
Entity Registrant Name	DEL TACO RESTAURANT PROPERTIES I
Entity Central Index Key	0000711213
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer