v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Document Information [Line Items]    
Entity Registrant Name Landmark Infrastructure Partners LP  
Entity Central Index Key 0001615346  
Document Type 10-Q  
Document Period End Date Sep. 30, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Limited Partners Units   25,353,140
Entity Shell Company false  
Entity File Number 001-36735  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 61-1742322  
Entity Address, Address Line One 400 Continental Blvd.  
Entity Address, Address Line Two Suite 500  
Entity Address, City or Town El Segundo  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 90245  
City Area Code 310  
Local Phone Number 598-3173  
Entity Interactive Data Current Yes  
Document Quarterly Report true  
Document Transition Report false  
Common Units    
Document Information [Line Items]    
Title of each class Common Units, Representing Limited Partner Interests  
Trading Symbol LMRK  
Name of each exchange on which registered NASDAQ  
8.0% Series A Cumulative Redeemable Preferred Units    
Document Information [Line Items]    
Title of each class 8.0% Series A Cumulative Redeemable Preferred Units, $25.00 par value  
Trading Symbol LMRKP  
Name of each exchange on which registered NASDAQ  
7.9% Series B Cumulative Redeemable Preferred Units    
Document Information [Line Items]    
Title of each class 7.9% Series B Cumulative Redeemable Preferred Units, $25.00 par value  
Trading Symbol LMRKO  
Name of each exchange on which registered NASDAQ  
Series C Floating-to-Fixed Rate Cumulative Redeemable Perpetual Convertible Preferred Units    
Document Information [Line Items]    
Title of each class Series C Floating-to-Fixed Rate Cumulative Redeemable Perpetual Convertible Preferred Units, $25.00 par value  
Trading Symbol LMRKN  
Name of each exchange on which registered NASDAQ