Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)

v3.5.0.2
Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)
 9 Months Ended
Sep. 30, 2016
USD ($)
option
Sep. 30, 2015
USD ($)
option
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 14 years 6 years 2 months 12 days
In-place Leases [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 8 years 8 months 12 days 4 years 1 month 6 days
Leasing Costs [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 10 years 7 months 6 days 5 years 6 months
Tenant Relationships [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 0 years 9 years 6 months
Below-market lease and deferred revenue [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 20 years 10 months 24 days 0 years
2016 New Real Estate Activity [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition Costs | $ $ 409,784  
2015 New Real Estate Activity [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition Costs | $   $ 518,986
Gunbarrel Road [Member] | 2016 New Real Estate Activity [Member] | Alamosa CO [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 1  
Lessee Leasing Arrangement Lease Renewal Term 5 years  
Acquisition Costs | $ $ 119,085  
Immokalee Exchange [Member] | 2015 New Real Estate Activity [Member] | Immokalee, FL [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option   2
Lessee Leasing Arrangement Lease Renewal Term   5 years
Acquisition Costs | $   $ 152,571
Holt County [Member] | 2015 New Real Estate Activity [Member] | Stuart, NE [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option   0
Acquisition Costs | $   $ 27,589
Rock County [Member] | 2015 New Real Estate Activity [Member] | Bassett, NE [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option   0
Acquisition Costs | $   $ 27,589
Calaveras Avenue [Member] | 2016 New Real Estate Activity [Member] | Coalinga, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 1  
Lessee Leasing Arrangement Lease Renewal Term 5 years  
Acquisition Costs | $ $ 38,501  
Orange Avenue [Member] | 2016 New Real Estate Activity [Member] | Fort Pierce, FL [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 2  
Lessee Leasing Arrangement Lease Renewal Term 7 years  
Acquisition Costs | $ $ 37,615  
Lithia Road [Member] | 2016 New Real Estate Activity [Member] | Plant City, FL [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 0  
Acquisition Costs | $ $ 38,296  
Baca County [Member] | 2016 New Real Estate Activity [Member] | Edler, CO [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 1  
Lessee Leasing Arrangement Lease Renewal Term 5 years  
Acquisition Costs | $ $ 72,340  
Diego Ranch [Member] | 2016 New Real Estate Activity [Member] | Stanislaus, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition Costs | $ 63,114  
Nevada Ranch [Member] | 2016 New Real Estate Activity [Member] | Merced, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition Costs | $ $ 40,833  
Espinosa Road [Member] | 2015 New Real Estate Activity [Member] | Salinas, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option   0
Acquisition Costs | $   $ 89,885
Parrish Road [Member] | 2015 New Real Estate Activity [Member] | Duette, FL [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option   2
Lessee Leasing Arrangement Lease Renewal Term   5 years
Acquisition Costs | $   $ 103,610
Bear Mountain [Member] | 2015 New Real Estate Activity [Member] | Arvin, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option   1
Lessee Leasing Arrangement Lease Renewal Term   10 years
Acquisition Costs | $   $ 117,742
Lease One [Member] | Diego Ranch [Member] | 2016 New Real Estate Activity [Member] | Stanislaus, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 3  
Lessee Leasing Arrangement Lease Renewal Term 5 years  
Lease One [Member] | Nevada Ranch [Member] | 2016 New Real Estate Activity [Member] | Merced, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 3  
Lessee Leasing Arrangement Lease Renewal Term 5 years  
Lease Two [Member] | Diego Ranch [Member] | 2016 New Real Estate Activity [Member] | Stanislaus, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 1  
Lessee Leasing Arrangement Lease Renewal Term 3 years  
Lease Two [Member] | Nevada Ranch [Member] | 2016 New Real Estate Activity [Member] | Merced, CA [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Lessee leasing arrangement lease renewal options | option 1  
Lessee Leasing Arrangement Lease Renewal Term 3 years