Investment Properties and Property Held for Sale - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013 State Property	Dec. 31, 2012	Dec. 31, 2011
Long Lived Assets Held-for-sale [Line Items]
Property leased to fully constructed fast-food restaurants	12
Location of properties	5
Partnership recognized income (losses) from discontinued operations	$ 0	$ 109,241	$ (478,490)
Property impairment write-(up) down	0	(142,747)	494,822
Denny's Phoenix A Z Property [Member]
Long Lived Assets Held-for-sale [Line Items]
Property impairment write-(up) down			104,705
Loss on sale of AZ property			1,000
Vacant Phoenix A Z Property [Member]
Long Lived Assets Held-for-sale [Line Items]
Property impairment write-(up) down			$ 390,117
Wendy's restaurants [Member]
Long Lived Assets Held-for-sale [Line Items]
Property leased to fully constructed fast-food restaurants	9
An Applebee restaurant [Member]
Long Lived Assets Held-for-sale [Line Items]
Property leased to fully constructed fast-food restaurants	1
KFC Restaurant [Member]
Long Lived Assets Held-for-sale [Line Items]
Property leased to fully constructed fast-food restaurants	1
Daytona's All Sports cafe [Member]
Long Lived Assets Held-for-sale [Line Items]
Property leased to fully constructed fast-food restaurants	1