Landmark Infrastructure Partners (LMRK) 10-Q 5 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
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, 2021
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	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Limited Partners Units		25,488,992
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

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Land	$ 117,556	$ 117,421
Real property interests	689,295	671,468
Construction in progress	40,043	44,787
Total land and real property interests	846,894	833,676
Accumulated depreciation and amortization of real property interests	(76,744)	(63,474)
Land and net real property interests	770,150	770,202
Investments in receivables, net	4,669	5,101
Investment in unconsolidated joint venture	58,456	60,880
Cash and cash equivalents	11,003	10,447
Restricted cash	3,360	3,195
Rent receivables	3,799	4,016
Due from Landmark and affiliates	1,843	1,337
Deferred loan costs, net	2,711	3,567
Deferred rent receivable	2,691	1,818
Derivative assets	345
Other intangible assets, net	17,718	19,417
Right-of-use asset, net	10,232	10,716
Other assets	4,176	4,082
Total assets	891,153	894,778
Liabilities and equity
Revolving credit facility	223,200	214,200
Secured notes, net	275,845	279,677
Accounts payable and accrued liabilities	7,984	6,732
Other intangible liabilities, net	5,054	6,081
Operating lease liability	8,563	8,818
Finance lease liability	70
Prepaid rent	6,266	4,446
Derivative liabilities	2,269	3,435
Total liabilities	529,251	523,389
Commitments and contingencies (Note 16)
Equity
Accumulated other comprehensive income	114	1,291
Total partners' equity	313,513	323,286
Noncontrolling interests	201	201
Total equity	313,714	323,487
Total liabilities, mezzanine equity and equity	891,153	894,778
Limited Partners | Preferred Units Series C
Mezzanine equity
Limited partners	48,188	47,902
Limited Partners | Preferred Units Series A
Equity
Limited partners	41,850	41,850
Total equity	41,850	41,850
Limited Partners | Preferred Units Series B
Equity
Limited partners	63,014	63,014
Total equity	63,014	63,014
Limited Partners | Common Units
Equity
Limited partners	365,108	376,201
Total equity	365,108	376,201
General Partner
Equity
General Partner	(156,573)	(159,070)
Total equity	$ (156,573)	$ (159,070)

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - Limited Partners - shares	Sep. 30, 2021	Dec. 31, 2020
Preferred Units Series C
Temporary equity, preferred units
Preferred units issued (in shares)	1,982,700	1,982,700
Preferred units outstanding (in shares)	1,982,700	1,982,700
Preferred Units Series A
Preferred units
Preferred units issued (in shares)	1,788,843	1,788,843
Preferred units outstanding (in shares)	1,788,843	1,788,843
Preferred Units Series B
Preferred units
Preferred units issued (in shares)	2,628,932	2,628,932
Preferred units outstanding (in shares)	2,628,932	2,628,932
Common Units
Common and subordinated units
Units issued (in shares)	25,488,992	25,478,042
Units outstanding (in shares)	25,488,992	25,478,042

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Rental revenue	$ 17,405	$ 14,228	$ 52,259	$ 41,893
Expenses
Property operating	1,188	360	2,966	1,223
General and administrative	1,483	768	3,915	3,479
Transaction-related	3,295		3,421	91
Depreciation and amortization	5,079	3,808	14,871	11,711
Impairments	8	16	35	200
Total expenses	11,053	4,952	25,208	16,704
Other income and expenses
Interest and other income	102	46	331	317
Interest expense	(4,962)	(4,068)	(14,830)	(12,759)
Loss on early extinguishment of debt				(2,231)
Unrealized gain (loss) on derivatives	194	154	1,511	(6,530)
Equity income (loss) from unconsolidated joint venture	329	248	(761)	1,085
Gain on sale of real property interests	79		189	15,508
Total other income and expenses	(4,258)	(3,620)	(13,560)	(20,118)
Income from continuing operations before income tax benefit	2,094	5,656	13,491	5,071
Income tax benefit	(80)	(173)	(80)	(508)
Income from continuing operations	2,174	5,829	13,571	5,579
Income (loss) from discontinued operations, net of tax		(171)		17,340
Net income	2,174	5,658	13,571	22,919
Less: Net income attributable to noncontrolling interest	8	8	24	24
Net income attributable to limited partners	2,166	5,650	13,547	22,895
Less: Distributions declared to preferred unitholders	(3,060)	(3,055)	(9,180)	(9,152)
Less: Accretion of Series C preferred units	(96)	(96)	(286)	(289)
Net income attributable to common unitholders	$ (990)	$ 2,499	$ 4,081	$ 13,454
Income (loss) from continuing operations per common unit
Common units – basic	$ (0.04)	$ 0.10	$ 0.16	$ (0.15)
Common units – diluted	(0.04)	0.10	0.16	(0.15)
Net income (loss) per common unit
Common units – basic	(0.04)	0.10	0.16	0.53
Common units – diluted	$ (0.04)	$ 0.10	$ 0.16	$ 0.53
Weighted average common units outstanding
Common units – basic	25,489	25,478	25,489	25,472
Common units – diluted	25,489	25,478	25,489	25,472
Cash distributions declared per common unit	$ 0.2000	$ 0.2000	$ 0.6000	$ 0.6000
Preferred Units Series C
Other income and expenses
Less: Accretion of Series C preferred units	$ (96)	$ (96)	$ (286)	$ (289)

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,174	$ 5,658	$ 13,571	$ 22,919
Other comprehensive income (loss):
Foreign currency translation adjustment	(1,399)	416	(1,177)	(5,234)
Reclassification adjustments of other comprehensive losses to gain on sale included in net income				4,352
Other comprehensive income (loss):	(1,399)	416	(1,177)	(882)
Comprehensive income	775	6,074	12,394	22,037
Less: Comprehensive income attributable to noncontrolling interest	8	8	24	24
Comprehensive income attributable to limited partners	$ 767	$ 6,066	$ 12,370	$ 22,013

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY AND MEZZANINE EQUITY - USD ($) $ in Thousands	Total	Preferred Units Series C	Revision of Prior Period, Accounting Standards Update, Adjustment	Limited PartnersCommon Units	Limited PartnersPreferred Units Series A	Limited PartnersPreferred Units Series B	Limited PartnersPreferred Units Series A	Limited PartnersPreferred Units Series C	General Partner	General PartnerRevision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Other Comprehensive Income (loss)	Noncontrolling Interest
Balance at Dec. 31, 2019	$ 321,658		$ (76)	$ 382,581		$ 60,926	$ 40,210		$ (162,277)	$ (76)	$ 17	$ 201
Balance (in units) at Dec. 31, 2019				25,353,140	1,722,000	2,544,793	1,722,041	1,988,700
Increase (decrease) in partners' capital
Accounting Standards Update [Extensible Enumeration]	ASU 2016-13
Foreign currency translation adjustment	$ (8,131)										(8,131)
Issuance of Common Units, net	1,510			$ 1,510
Issuance of Units, net (in units)				110,000	23,000	84,000
Issuance of Preferred Units, net	2,663					$ 2,088	$ 575
Distributions	(11,558)			$ (9,360)		(1,319)	(871)					(8)
Capital contribution from Sponsor	1,101								1,101
Unit-based compensation	120			$ 120
Unit-based compensation (in units)				7,000
Net income (loss)	(2,339)			$ (4,537)		1,319	871					8
Balance at Mar. 31, 2020	304,948			$ 370,314		$ 63,014	40,785		(161,252)		(8,114)	201
Balance (in units) at Mar. 31, 2020				25,470,000	1,745,000	2,629,000
Temporary equity, Balance at Dec. 31, 2019								$ 47,666
Increase (Decrease) in temporary equity
Temporary equity, Distributions								(870)
Temporary equity, Net income (loss)								967
Temporary equity, Balance at Mar. 31, 2020								$ 47,763
Balance at Dec. 31, 2019	321,658		$ (76)	$ 382,581		$ 60,926	$ 40,210		(162,277)	$ (76)	17	201
Balance (in units) at Dec. 31, 2019				25,353,140	1,722,000	2,544,793	1,722,041	1,988,700
Increase (decrease) in partners' capital
Conversion of Preferred Units		$ 150
Balance at Sep. 30, 2020	322,515			$ 378,263		$ 63,014	$ 41,800		(159,898)		(865)	201
Balance (in units) at Sep. 30, 2020				25,478,042	1,787,000	2,628,932	1,786,775	1,982,700
Temporary equity, Balance at Dec. 31, 2019								$ 47,666
Temporary equity, Balance at Sep. 30, 2020								47,805
Balance at Mar. 31, 2020	304,948			$ 370,314		$ 63,014	$ 40,785		(161,252)		(8,114)	201
Balance (in units) at Mar. 31, 2020				25,470,000	1,745,000	2,629,000
Increase (decrease) in partners' capital
Foreign currency translation adjustment	6,833										6,833
Distributions	(7,275)			$ (5,096)		$ (1,298)	(873)					(8)
Capital contribution from Sponsor	929								929
Net income (loss)	17,671			15,492		1,298	873					8
Conversion of Preferred Units	150			$ 150
Conversion of Preferred Units, net (in units)				8,000
Balance at Jun. 30, 2020	323,256			$ 380,860		$ 63,014	40,785		(160,323)		(1,281)	201
Balance (in units) at Jun. 30, 2020				25,478,000	1,745,000	2,629,000
Temporary equity, Balance at Mar. 31, 2020								47,763
Increase (Decrease) in temporary equity
Temporary equity, Conversion of Preferred Units								(150)
Temporary equity, Distributions								(866)
Temporary equity, Net income (loss)								962
Temporary equity, Balance at Jun. 30, 2020								$ 47,709
Increase (decrease) in partners' capital
Foreign currency translation adjustment	416										416
Issuance of Preferred Units, net	1,015				$ 42		1,015
Distributions	(7,292)			$ (5,096)		$ (1,298)	(890)					(8)
Capital contribution from Sponsor	425								425
Net income (loss)	4,695			2,499		1,298	890					8
Balance at Sep. 30, 2020	322,515			$ 378,263		$ 63,014	$ 41,800		(159,898)		(865)	201
Balance (in units) at Sep. 30, 2020				25,478,042	1,787,000	2,628,932	1,786,775	1,982,700
Increase (Decrease) in temporary equity
Temporary equity, Distributions								$ (867)
Temporary equity, Net income (loss)								963
Temporary equity, Balance at Sep. 30, 2020								$ 47,805
Balance at Dec. 31, 2020	323,487			$ 376,201	$ 41,850	$ 63,014			(159,070)		1,291	201
Balance (in units) at Dec. 31, 2020				25,478,042		2,628,932	1,788,843	1,982,700
Increase (decrease) in partners' capital
Foreign currency translation adjustment	(25)										(25)
Distributions	(7,298)			$ (5,098)	(894)	$ (1,298)						(8)
Capital contribution from Sponsor	938								938
Unit-based compensation	120			$ 120
Unit-based compensation (in units)				11,000
Net income (loss)	4,989			$ 2,789	894	1,298						8
Balance at Mar. 31, 2021	322,211			$ 374,012	41,850	$ 63,014			(158,132)		1,266	201
Balance (in units) at Mar. 31, 2021				25,489,000		2,629,000	1,789,000
Temporary equity, Balance at Dec. 31, 2020								$ 47,902
Increase (Decrease) in temporary equity
Temporary equity, Distributions								(868)
Temporary equity, Net income (loss)								962
Temporary equity, Balance at Mar. 31, 2021								$ 47,996
Balance at Dec. 31, 2020	323,487			$ 376,201	41,850	$ 63,014			(159,070)		1,291	201
Balance (in units) at Dec. 31, 2020				25,478,042		2,628,932	1,788,843	1,982,700
Balance at Sep. 30, 2021	313,714			$ 365,108	41,850	$ 63,014			(156,573)		114	201
Balance (in units) at Sep. 30, 2021				25,488,992		2,628,932	1,788,843	1,982,700
Temporary equity, Balance at Dec. 31, 2020								$ 47,902
Temporary equity, Balance at Sep. 30, 2021								48,188
Balance at Mar. 31, 2021	322,211			$ 374,012	41,850	$ 63,014			(158,132)		1,266	201
Balance (in units) at Mar. 31, 2021				25,489,000		2,629,000	1,789,000
Increase (decrease) in partners' capital
Foreign currency translation adjustment	247										247
Distributions	(7,299)			$ (5,098)	(895)	$ (1,298)						(8)
Capital contribution from Sponsor	509								509
Net income (loss)	4,483			2,282	895	1,298						8
Balance at Jun. 30, 2021	320,151			$ 371,196	41,850	$ 63,014			(157,623)		1,513	201
Balance (in units) at Jun. 30, 2021				25,489,000		2,629,000	1,789,000
Temporary equity, Balance at Mar. 31, 2021								47,996
Increase (Decrease) in temporary equity
Temporary equity, Distributions								(867)
Temporary equity, Net income (loss)								963
Temporary equity, Balance at Jun. 30, 2021								$ 48,092
Increase (decrease) in partners' capital
Foreign currency translation adjustment	(1,399)										(1,399)
Distributions	(7,299)			$ (5,098)	(894)	$ (1,299)						(8)
Capital contribution from Sponsor	1,050								1,050
Net income (loss)	1,211			(990)	894	1,299						8
Balance at Sep. 30, 2021	$ 313,714			$ 365,108	$ 41,850	$ 63,014			$ (156,573)		$ 114	$ 201
Balance (in units) at Sep. 30, 2021				25,488,992		2,628,932	1,788,843	1,982,700
Increase (Decrease) in temporary equity
Temporary equity, Distributions								$ (867)
Temporary equity, Net income (loss)								963
Temporary equity, Balance at Sep. 30, 2021								$ 48,188

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income	$ 13,571	$ 22,919
Adjustments to reconcile net income to net cash provided by operating activities:
Unit-based compensation	120	120
Unrealized (gain) loss on derivatives	(1,511)	8,329
Loss on early extinguishment of debt		2,231
Depreciation and amortization expense	14,871	12,247
Amortization of above- and below- market lease, net	(708)	(726)
Amortization of deferred loan costs	1,625	1,569
Amortization of discount on secured notes	282	276
Impairments	35	200
Gain on sale of real property interests	(189)	(15,508)
Adjustment for uncollectible accounts		195
Equity (income) loss from unconsolidated joint venture	761	(1,085)
Return on investment in unconsolidated joint venture	1,663	1,651
Foreign currency transaction gain		(2,721)
Changes in operating assets and liabilities:
Rent receivables	184	863
Accounts payable and accrued liabilities	2,990	2,175
Deferred rent	(614)	391
Prepaid rent	1,835	279
Due from Landmark and affiliates	(407)	(1,464)
Other assets	193	41
Net cash provided by operating activities	34,701	31,982
Investing activities
Acquisition of land	(545)	(7,438)
Acquisition of real property interests and development activities	(16,097)	(137,105)
Proceeds from sale of real property interests	365	120,190
Repayments of receivables	432	393
Net cash used in investing activities	(15,845)	(23,960)
Financing activities
Proceeds from the issuance of Common Units, net		1,509
Proceeds from the issuance of Preferred Units, net		3,678
Proceeds from revolving credit facility	9,000	172,200
Proceeds from the issuance of secured notes		170,000
Principal payments on revolving credit facility		(209,343)
Principal payments on secured notes	(4,555)	(110,972)
Payments on finance leases		(26)
Payments on settlement of derivatives		(7,565)
Deferred loan costs	(328)	(2,029)
Capital contribution to fund general and administrative expense reimbursement	2,275	2,925
Distributions to non-controlling interests	(24)	(24)
Net cash used in financing activities	(18,113)	(8,405)
Effect of changes in foreign currency exchange rates on cash, cash equivalents and restricted cash	(22)	(234)
Net increase (decrease) in cash, cash equivalents and restricted cash	721	(617)
Cash, cash equivalents and restricted cash at beginning of the period	13,642	13,065
Cash, cash equivalents and restricted cash at end of the period	14,363	12,448
Limited Partners | Preferred Units
Financing activities
Distributions to limited partners	(9,187)	(9,206)
Limited Partners | Common Units
Financing activities
Distributions to limited partners	$ (15,294)	$ (19,552)

Business

Business	9 Months Ended
	Sep. 30, 2021
Limited Liability Company Or Limited Partnership Business Organization And Operations [Abstract]
Business	1. Business Landmark Infrastructure Partners LP (the “Partnership”) was formed on July 28, 2014 by Landmark Dividend LLC (“Landmark” or “Sponsor”) to acquire, develop, own and manage a portfolio of real property interest and infrastructure assets that are leased to companies in the wireless communication, digital infrastructure, outdoor advertising and renewable power generation industries. The Partnership is a master limited partnership organized in the State of Delaware and has been publicly traded since its initial public offering on November 19, 2014. On July 31, 2017, the Partnership completed changes to its organizational structure by transferring substantially all of its assets to a consolidated subsidiary, Landmark Infrastructure Inc., a Delaware corporation (“REIT Subsidiary”), which elected to be taxed as a REIT commencing with its taxable year ending December 31, 2017. References in this report to “Landmark Infrastructure Partners LP,” the “partnership,” “we,” “our,” “us,” or like terms refer to Landmark Infrastructure Partners LP. Our operations are managed by the board of directors and executive officers of our general partner (the “General Partner”). As of October 15, 2021, our Sponsor owned (a) our general partner, (b) 5,066,408 common units representing limited partnership interest in the Partnership (“Common Units”); and (c) all of our incentive distribution rights (“IDRs”). On May 15, 2021, Digital LD Management / Non-REIT Holdings, LP (and its affiliates, “DigitalBridge”) entered into a Purchase and Sale Agreement (the “PSA”) with Landmark Dividend Holdings II LLC, an affiliate of Landmark and our general partner providing for the acquisition of Landmark. On June 2, 2021, DigitalBridge completed the acquisition of Landmark and provided to the Board a non-binding proposal to acquire, through a series of transactions, substantially all of the assets of the Partnership. On August 21, 2021, the Partnership entered into a definitive transaction agreement with Landmark to acquire substantially all of the assets of the Partnership through a series of transactions (the “Transaction Agreement”). Under the terms of the Transaction Agreement each issued and outstanding Common Unit, other than those Common Units owned by Landmark or its affiliates, will be converted into the right to receive $16.50 per Common Unit in cash without any interest thereon. Completion of the transactions is conditioned upon, among other things, approval of the Transaction Agreement and the transactions by holders of at least a majority of the issued and outstanding Common Units of the Partnership.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	2. Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidated Financial Statements On an ongoing basis, we evaluate each legal entity that is not wholly owned by us in accordance with the consolidation guidance. The accompanying consolidated financial statements include the accounts of the Partnership, its wholly-owned subsidiaries and those entities in which it has a controlling interest. Investments in entities that the Partnership does not control are accounted for using the equity or cost method, depending upon the Partnership’s ability to exercise significant influence over operating and financial policies. The unaudited interim consolidated financial statements have been prepared in conformity with GAAP as established by the Financial Accounting Standards Board (the “FASB”) in the Accounting Standards Codification (“ASC”) including modifications issued under the Accounting Standards Updates (“ASUs”) and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The accompanying unaudited financial statements include, in our opinion, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the unaudited financial information set forth therein. Financial information for the three and nine months ended September 30, 2021 and 2020 included in these Notes to the Consolidated Financial Statements is derived from our unaudited financial statements. Certain notes and other information have been condensed or omitted from the interim financial statements included in this report. Operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. All references to tenant sites are outside the scope of our independent registered public accounting firm’s review of our financial statements in accordance with the public company accounting oversight board (U.S.). Use of Estimates The preparation of the consolidated financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Income Taxes The Partnership is generally not subject to federal, state or local income taxes, except for our subsidiary Landmark Infrastructure Asset OpCo LLC (“Asset OpCo”) and our foreign subsidiaries. Each limited partner is responsible for the tax liability, if any, related to its proportionate share of the Partnerships’ taxable income or loss. Asset OpCo conducts certain activities that may not generate qualifying income and will be treated as a corporation for U.S. federal income tax purposes. Asset OpCo and certain consolidated foreign subsidiaries of the Partnership conduct certain activities in international locations that generate taxable income and will be treated as taxable entities. Additionally, our consolidated REIT subsidiary, Landmark Infrastructure Inc., a Delaware corporation, files as a corporation for U.S. federal income tax purposes. The REIT Subsidiary has elected to be treated as a REIT and we believe that it has operated in a manner that has allowed the REIT Subsidiary to qualify as a REIT for federal income tax purposes, and the REIT Subsidiary intends to continue operating in such manner. If the REIT Subsidiary fails to qualify as a REIT in any taxable year, and is unable to avail itself of certain savings provisions, all of its taxable income would be subject to federal income tax at regular corporate rates. The Partnership may also be subject to various non-income taxes, filing fees, and franchise taxes in various states that are reflected in operating expenses. The Partnership follows the requirements of ASC Topic 740, Income Taxes Investment in Unconsolidated Joint Venture The Partnership accounts for its investment in an unconsolidated joint venture using the equity method of accounting. Under the equity method, the investment is initially recorded at fair value and subsequently adjusted for distributions and the Partnership’s proportionate share of equity in the joint venture’s income (loss). The Partnership recognizes its proportionate share of the ongoing income or loss of the unconsolidated joint venture as equity income (loss) from unconsolidated joint venture on the consolidated statements of operations. On a quarterly basis, the Partnership evaluates its investment in an unconsolidated joint venture for other-than-temporary impairments. Discontinued Operations If the disposition of a component, being an operating or reportable segment, business unit, subsidiary or asset group, represents a strategic shift that has or will have a major effect on the Partnership’s operations and financial results, the operating profits or losses of the component disposed of by sale or when classified as held for sale, and the gain or loss upon disposition of the component, are presented as discontinued operations in the statements of operations. On June 17, 2020, the Partnership completed the sale of its interest in the consolidated joint venture that held its European outdoor advertising portfolio for a purchase price of £95 million. As a result, the sale of the European outdoor advertising portfolio represented a strategic shift that had a major effect on the Partnership’s operations and financial results and met the criteria as discontinued operations in June 2020. Accordingly, for prior period presented, the related operating results, including interest expense and unrealized loss on the interest rate swap agreement denominated in GBP, are presented as income from discontinued operations on the consolidated statement of operations ( Note 8 Recently Issued Accounting Standards Changes to GAAP are established by the FASB in the form of ASUs to the FASB’s ASC. The Partnership considers the applicability and impact of all ASUs. Newly issued ASUs are not expected to have a material impact on its consolidated financial position and results of operations because either the ASU is not applicable, or the impact is expected to be immaterial.

Acquisitions and Developments

Acquisitions and Developments	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Acquisitions and Developments	3. Acquisitions and Developments Third Party Acquisitions The following table presents direct third-party acquisitions, excluding transaction costs, completed by the Partnership during the nine months ended September 30, 2021 and for the year ended December 31, 2020. No. of Tenant Sites Consideration (in millions) Acquisition Description Wireless Communication Digital Infrastructure Outdoor Advertising Total Borrowings and Available Cash Total First Quarter International — — 1 1 $ 0.3 $ 0.3 Total — 1 1 $ 0.3 $ 0.3 Second Quarter International 3 — — 3 $ 1.3 $ 1.3 Total 3 — — 3 $ 1.3 $ 1.3 Third Quarter International 6 — — 6 $ 0.6 $ 0.6 Total 6 — — 6 $ 0.6 $ 0.6 2021 Total 9 — 1 10 $ 2.2 $ 2.2 First Quarter International — — 1 1 $ 0.1 $ 0.1 Total — — 1 1 $ 0.1 $ 0.1 Second Quarter International 6 — — 6 $ 1.3 $ 1.3 Total 6 — — 6 $ 1.3 $ 1.3 Third Quarter International — 1 — 1 $ 20.1 $ 20.1 Domestic — 6 — 6 107.7 107.7 Total — 7 — 7 $ 127.8 $ 127.8 Fourth Quarter Domestic — 1 — 1 $ 15.0 $ 15.0 Total — 1 — 1 $ 15.0 $ 15.0 2020 Total 6 8 1 15 $ 144.2 $ 144.2 Leases The Partnership evaluates whether an easement meets the definition of a lease under the new lease standard (“ASC 842”). The Partnership determines if an arrangement is a lease at the date of acquisition. The Partnership considers an arrangement to be a lease if it conveys the right to control the use of the leased site or ground space underneath a leased site for a period of time in exchange for consideration. While most of our leases are classified as operating leases in which the Partnership is the lessor, the Partnership is the lessee in an insignificant population of operating and finance leases that have recurring ground lease rental payments. The lease liability is the present value of the remaining minimum rental payments using each respective lease term and a corresponding incremental borrowing rate. We use a weighted-average discount rate of approximately 4.3%, which is the interest rate that we estimate we would have to pay to borrow on a collateralized basis over a similar term for an amount equal to the lease payments. As of September 30, 2021 and December 31, 2020, the weighted-average remaining lease term is approximately 10 and 8 years, respectively. Operating lease assets are included in right of use, net and finance lease assets are included in real property interests in the consolidated balance sheets. The following table illustrates information about other lease related balances as of September 30, 2021 and December 31, 2020 (in thousands): September 30, 2021 December 31, 2020 Operating leases: Right-of-use asset $ 10,232 $ 10,716 Operating lease liability 8,563 8,818 Finance leases: Right-of-use asset (1) $ 2,838 $ 1,229 Finance lease liability 70 — (1) Assets held under finance leases are recorded in Real property interests and are depreciated over the lease term. The following table represents the future minimum ground lease payments as of September 30, 2021 (in thousands): Operating Lease Finance Lease 2021 (three months) $ 152 $ 2 2022 611 9 2023 623 9 2024 632 9 2025 644 9 Thereafter 11,622 45 Total future payments 14,284 83 Discount (5,721 ) (13 ) Total lease liability $ 8,563 $ 70 Developments During 2017, the Partnership started developing an ecosystem of technologies that provide smart enabled infrastructure including stealth towers and digital outdoor advertising kiosks across North America. Stealth towers are self-contained, neutral-host towers designed for wireless carrier and other wireless operator collocation. The stealth towers are designed for macro, mini macro and small cell deployments and will support Internet of Things (“IoT”), carrier densification needs, private LTE networks and other wireless solutions. During the fourth quarter of fiscal year 2018, the Partnership entered into an agreement with Dallas Area Rapid Transit (“DART”) to develop a smart media and communications platform which will include the deployment of content-rich kiosks and the Partnership’s smart enabled infrastructure As of September 30, 2021 and December 31, 2020, the Partnership’s $40.0 million and $44.8 million, respectively, of construction in progress balance primarily related to these projects. During the nine months ended September 30, 2021, the Partnership deployed 157 DART kiosks for a total of $17.2 million. During the year ended December 31, 2020, the Partnership deployed two stealth towers, 112 DART kiosks and placed in service other assets for a total of $16.2 million.

Real Property Interests

Real Property Interests	9 Months Ended
	Sep. 30, 2021
Real Estate [Abstract]
Real Property Interests	4. Real Property Interests The following table summarizes the Partnership’s real property interests (in thousands): September 30, 2021 December 31, 2020 Land $ 117,556 $ 117,421 Building and site improvements 169,300 169,275 Real property interests – perpetual 101,372 101,785 Real property interests – finite life 415,785 399,179 Real property interests – ROU asset finance lease 2,838 1,229 Total real property interests 689,295 671,468 Construction in progress 40,043 44,787 Total land and real property interests 846,894 833,676 Accumulated depreciation and amortization of real property interests (76,744 ) (63,474 ) Land and net real property interests $ 770,150 $ 770,202 Sales During the three months ended September 30, 2021, the Partnership received total consideration of $0.2 million related to a tenant site lost to eminent domain proceedings and recognized a gain on the sale of real property interests of $0.1 million. On June 30, 2021, the Partnership completed the sale of two of its real property interests for total consideration of $0.1 million. We recognized a gain on the sale of real property interest of $0.1 million upon completion of the sale. On June 17, 2020, the Partnership completed the sale of its interest in the consolidated joint venture that held its European outdoor advertising portfolio for a purchase price of £95 million. The sale of the European outdoor advertising portfolio met the criteria for discontinued operations. Accordingly, the related operating results are presented as income from discontinued operations on the consolidated statement of operations for the prior period ( Note 8 Purchase Price Allocation The Partnership applies the asset acquisition method to all acquired investments of real property interests for transactions that meet the definition of an asset acquisition. The fair value of the assets acquired and liabilities assumed is typically determined by using Level III valuation methods. The most sensitive assumption is the discount rate used to discount the estimated cash flows from the real estate rights. For purposes of the computation of fair value assigned to the various tangible and intangible assets, the Partnership assigned discount rates ranging between 6% and 20% with a weighted average discount rate of 8.5%. The following table summarizes final allocations for acquisitions made during the nine months ended September 30, 2021 and the year ended December 31, 2020 of estimated fair values of the assets acquired and liabilities assumed (in thousands). Investments in In-place Above-market real property lease lease ROU Lease Period Land interests intangibles intangibles asset liability Debt Total 2021 $ 504 $ — $ 88 $ 78 $ 1,650 $ (70 ) $ — $ 2,226 2020 9,338 144,672 45 — 748 — (3,354 ) 151,449 Future estimated aggregate depreciation and amortization of finite-lived real property interests for each of the five succeeding fiscal years and thereafter as of September 30, 2021, are as follows (in thousands): 2021 (three months) $ 4,997 2022 18,832 2023 17,374 2024 17,066 2025 17,029 Thereafter 435,881 Total $ 511,179 The weighted average remaining depreciation and amortization period for non‑perpetual real property interests is 36 years as of September 30, 2021. Impairments During the three and nine months ended September 30, 2021, the Partnership recognized impairment charges totaling less than $0.1 million for one of the Partnership’s real property interests that was impaired. During the three and nine months ended September 30, 2020, the Partnership recognized impairment charges totaling less than $0.1 million and $0.2 million, respectively, for one and four of the Partnership’s real property interests that were impaired and one non-lease renewal. The carrying value of each impaired real property interest was determined to have a fair value of zero.

Other Intangible Assets and Lia

Other Intangible Assets and Liabilities	9 Months Ended
	Sep. 30, 2021
Other Intangible Assets And Liabilities [Abstract]
Other Intangible Assets and Liabilities	5. Other Intangible Assets and Liabilities The following table summarizes our identifiable intangible assets, including above/below‑market lease intangibles (in thousands): September 30, 2021 December 31, 2020 Acquired in-place lease Gross amount $ 26,826 $ 26,819 Accumulated amortization (11,444 ) (9,998 ) Net amount $ 15,382 $ 16,821 Acquired above-market leases Gross amount $ 6,631 $ 6,564 Accumulated amortization (4,295 ) (3,968 ) Net amount $ 2,336 $ 2,596 Total other intangible assets, net $ 17,718 $ 19,417 Acquired below-market leases Gross amount $ (16,785 ) $ (16,779 ) Accumulated amortization 11,731 10,698 Total other intangible liabilities, net $ (5,054 ) $ (6,081 ) We recorded net amortization of above‑ and below‑market lease intangibles of $0.2 million and $0.7 million as an increase to rental revenue for the three and nine months ended September 30, 2021 and 2020, respectively. We recorded amortization of in‑place lease intangibles of $0.5 million and $1.5 million as amortization expense for the three and nine months ended September 30, 2021 and 2020, respectively. Future aggregate amortization of intangibles for each of the five succeeding fiscal years and thereafter as of September 30, 2021 follows (in thousands): Acquired in-place leases Acquired above-market leases Acquired below-market leases 2021 (three months) $ 491 $ 97 $ (334 ) 2022 1,919 353 (1,255 ) 2023 1,647 318 (813 ) 2024 1,533 294 (722 ) 2025 1,406 235 (423 ) Thereafter 8,386 1,039 (1,507 ) Total $ 15,382 $ 2,336 $ (5,054 )

Investments in Receivables

Investments in Receivables	9 Months Ended
	Sep. 30, 2021
Notes Receivable Net [Abstract]
Investments in Receivables	6. Investments in Receivables Investments in receivables include financing arrangements and management agreements whereby we purchased the right to receive a portion of a rental payment under a contract but are not a party to the lease and do not have a real property interest. Additionally, certain lease arrangements of real property interests meet the definition of a financial asset and are included in investments in receivables in our financial statements. Investments in receivables also include arrangements with T‑Mobile whereby we purchased the right to retain a portion of a lease payment prior to passing the remainder to the property owner. The receivables are unsecured with payments collected over periods ranging from 2 to 99 years Interest income recognized on the receivables totaled $0.1 million and $0.3 million for the three and nine months ended September 30, 2021 and 2020, respectively. The following table reflects the activity in investments in receivables (in thousands): September 30, 2021 December 31, 2020 Investments in receivables – beginning $ 5,101 $ 5,653 Adoption of ASU 2016-13 — (53 ) Other — 7 Repayments (432 ) (506 ) Investments in receivables – ending $ 4,669 $ 5,101 Annual amounts due as of September 30, 2021, are as follows (in thousands): 2021 (three months) $ 265 2022 1,157 2023 1,260 2024 1,316 2025 780 Thereafter 4,705 Total $ 9,483 Interest $ 4,814 Principal 4,669 Total $ 9,483

Investment in Unconsolidated Jo

Investment in Unconsolidated Joint Venture	9 Months Ended
	Sep. 30, 2021
Equity Method Investments And Joint Ventures [Abstract]
Investment in Unconsolidated Joint Venture	7. Investment in Unconsolidated Joint Venture On September 24, 2018, the Partnership completed the formation of the unconsolidated JV. The Partnership contributed 545 tenant site assets to the unconsolidated JV that secured the Partnership’s $125.4 million Series 2018-1 secured notes (the “2018 Securitization”), in exchange for a 50.01% membership interest in the unconsolidated JV and $65.5 million in cash (the “Transaction”). The Partnership does not control the unconsolidated JV and therefore, accounts for its investment in the unconsolidated JV using the equity method of accounting prospectively upon formation of the unconsolidated JV In addition to the contribution of assets, the JV assumed the 2018 Securitization on June 6, 2018 involving certain tenant sites and related property interests owned by certain unrestricted special purpose subsidiaries of the Partnership, through the issuance of the Class C, Class D and Class F Series 2018-1 Secured Notes (the “2018 Secured Notes”), in an aggregate principal amount of $125.4 million. The Class F notes are subordinated in right of payment to the Class D notes and the Class D notes are subordinated in right of payment to the Class C notes. The 2018 Secured Notes were issued at a discount of less than $0.1 million, which will be accreted and recognized as interest expense over the term of the secured notes. The Class C, Class D and Class F 2018 Secured Notes bear interest at a fixed note rate per annum of 3.97%, 4.70% and 5.92%, respectively The following table summarizes balance sheet information for the unconsolidated JV (in thousands): September 30, 2021 December 31, 2020 Total assets $ 242,985 $ 249,252 Total liabilities 122,611 124,034 Total equity 120,374 125,218 Total liabilities and equity $ 242,985 $ 249,252 The following table summarizes financial information for the unconsolidated JV (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Rental revenue $ 3,636 $ 3,643 $ 10,895 $ 10,773 Net income (loss) 658 496 (1,522 ) 2,170 Partnership's share in net income (loss) 329 248 (761 ) 1,085 Distributions declared to the Partnership 1,184 725 1,663 1,651

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2021
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	8. Discontinued Operations The following table presents income from discontinued operations in connection with the sale of the European outdoor advertising portfolio (in thousands): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2020 Revenue Rental revenue from discontinued operations $ — $ 3,401 Expenses Property operating — 387 General and administrative — 211 Transaction-related — 341 Depreciation and amortization — 536 Total expenses from discontinued operations — 1,475 Other income and expenses Interest and other income — 105 Interest expense — (641 ) Unrealized loss on derivatives — (1,799 ) Gain (loss) on sale of real property interests (215 ) 15,508 Foreign currency transaction gain 86 2,721 Total other income and expenses from discontinued operations (129 ) 15,894 Income (loss) from discontinued operations before income tax expense (129 ) 17,820 Income tax expense 42 480 Income (loss) from discontinued operations $ (171 ) $ 17,340

Debt

Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Debt	9. Debt The following table summarizes the Partnership’s debt (in thousands): Outstanding Balance Maturity Date September 30, 2021 December 31, 2020 Revolving credit facility November 15, 2023 $ 223,200 $ 214,200 PACE Special Assessment loan February 14, 2038 $ 3,351 $ 3,480 4.38% senior secured notes June 30, 2036 35,952 37,686 Series 2019-1 Class A 3.90% January 14, 2027 170,000 170,000 Series 2017-1 Class A 4.10% November 15, 2022 (1) 54,261 56,676 Series 2017-1 Class B 3.81% November 15, 2022 (1) 16,539 16,816 Secured Notes 280,103 284,658 Discount on Secured Notes (549 ) (831 ) Deferred loan costs (3,709 ) (4,150 ) Secured Notes, net $ 275,845 $ 279,677 (1) Maturity date reflects anticipated repayment date; final legal maturity is November 15, 2047. Revolving Credit Facility The Partnership’s revolving credit facility with Truist Bank, as administrative agent, and a syndicate of lenders will mature on November 15, 2023 and will be available for working capital, capital expenditures, permitted acquisitions and general partnership purposes, including distributions. On November 15, 2018, the Partnership completed its Third Amended and Restated Credit Facility and obtained commitments from a syndicate of banks with initial borrowing commitments of $450.0 million for five-years Loans under the revolving credit facility bear interest at a rate equal to the applicable London Inter Bank Offering Rate (“LIBOR”) related to the currency for which borrowings are denominated, plus a spread ranging from 1.75% to 2.25% (determined based on leverage levels). As of September 30, 2021, the applicable spread was 2.25%. Additionally, under the revolving credit facility we will be subject to an annual commitment fee (determined based on leverage levels) associated with the available undrawn capacity subject to certain restrictions. As of September 30, 2021, the applicable annual commitment rate used was 0.20%. The revolving credit facility requires monthly interest payments and the outstanding debt balance is due upon maturity on November 15, 2023. As of September 30, 2021, $223.2 million was outstanding and $226.8 million of undrawn borrowing capacity under the revolving credit facility (including standby letter of credit arrangements of $5.8 million), subject to compliance with various financial covenants. As of September 30, 2021, the Partnership was in compliance with all financial covenants required under the revolving credit facility. Secured Notes On January 15, 2020, certain subsidiaries of the Partnership entered into a master note purchase and participation agreement (“MNPPA”) pursuant to which such subsidiaries issued and sold an initial $170 million aggregate principal amount of 3.90% series A senior secured notes in a private placement (the “2019 Secured Notes”). The 2019 Secured Notes mature on January 14, 2027 and include an interest-only initial term of three years. The net proceeds were used to repay in full the 2016 Secured Notes by $108 million and the revolving credit facility by $59 million. In connection with the issuance of the senior secured notes, the Partnership obtained a standby letter of credit arrangement totaling $3.4 million. On April 24, 2018, the Partnership entered into a note purchase and private shelf agreement (“Note Purchase Agreement”) pursuant to which the Partnership agreed to sell an initial $43.7 million aggregate principal amount of 4.38% senior secured notes, in a private placement (the “4.38% Senior Secured Notes”) involving a segregated pool of renewable power generation sites and related property interests. The 4.38% Senior Secured Notes are fully amortized through June 30, 2036. We used all the net proceeds of $41.0 million to repay a portion of the borrowings under our revolving credit facility. In connection with the issuance of the 4.38% Senior Secured Notes, the Partnership obtained a standby letter of credit arrangement totaling $2.4 million. On November 30, 2017, the Partnership completed a securitization transaction (the “2017 Securitization”) involving certain outdoor advertising tenant sites and related property interests owned by certain unrestricted special purpose subsidiaries of the Partnership, through the issuance of the Class A and Class B Series 2017-1 Secured Notes (the “2017 Secured Notes”), in an aggregate principal amount of $80.0 million. The Class B notes are subordinated in right of payment to the Class A notes. The 2017 Secured Notes were issued at a discount of $1.8 million, which will be accreted and recognized as interest expense over the term of the secured notes. The Class A and Class B 2017 Secured Notes bear interest at a fixed note rate per annum of 4.10% and 3.81%, respectively. The secured notes described above are collectively referred to as the “Secured Notes” and the tenant site assets securing the Secured Notes are collectively referred to as the “Secured Tenant Site Assets.” The Secured Notes are secured by (1) mortgages and deeds of trust on substantially all of the Secured Tenant Site Assets and their operating cash flows, (2) a security interest in substantially all of the personal property of the obligors (as defined in the applicable indenture), and (3) the rights of the obligors under a management agreement. Under the terms of the applicable indenture, amounts due under the Secured Notes will be paid solely from the cash flows generated from the operation of the Secured Tenant Site Assets, as applicable, which must be deposited into reserve accounts, and thereafter distributed solely pursuant to the terms of the applicable indenture. On a monthly basis, after payment of all required amounts under the applicable indenture, subject to the conditions described below, the excess cash flows generated from the operation of such assets are released to the Partnership. As of September 30, 2021 and December 31, 2020, $3.4 million and $3.2 million was held in such reserve accounts which are classified as restricted cash on the accompanying consolidated balance sheets. The Partnership is subject to covenants customary for notes issued in rated securitizations. Among other things, the obligors are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets (as defined in the applicable agreement). Under the terms of the applicable indenture, the obligors will be permitted to issue additional notes under certain circumstances, including so long as the debt service coverage ratio (“DSCR”) of the issuer is at least 1.5x to 1.0x for the 2019 Secured Notes and at least 2.0x to 1.0x for the 2017 Secured Notes. As of September 30, 2021, the Partnership was in compliance with all financial covenants under the Secured Notes. Other Secured Debt On September 25, 2020, the Partnership assumed a Property Assessed Clean Energy (“PACE”) Special Assessment bond of $3.5 million in connection with a data center acquisition during the third quarter of 2020. The financing agreement is a previous owner-arranged financing agreement dated July 1, 2018 in which PACE bonds were issued by local municipality to the then current property owner for the purpose of financing energy efficiency improvements to the property. These bonds are secured by the property and mature on over the term. The Partnership has assumed the secured debt, which is included in secured notes, net in the consolidated balance sheet. The secured notes’ annual principal payment amounts due as of September 30, 2021, are as follows (in thousands): 2021 (three months) $ 1,605 2022 (1) 72,527 2023 6,946 2024 7,293 2025 7,619 Thereafter (1) 184,113 Total $ 280,103 (1) Reflects anticipated repayment dates Interest Expense The Partnership incurred interest expense of $5.0 million and $14.8 million for the three and nine months ended September 30, 2021, respectively, and $4.1 million and $12.8 million for the three and nine months ended September 30, 2020, respectively. At September 30, 2021 and December 31, 2020, the Partnership had interest payable of $0.3 million, respectively. Additionally, the Partnership recorded amortization of deferred loan costs and discount on secured notes, which is included in interest expense, of $0.7 million and $1.9 million for the three and nine months ended September 30, 2021, respectively, and $0.6 million and $1.8 million for the three and nine months ended September 30, 2020, respectively.

Interest Rate Swap Agreements

Interest Rate Swap Agreements	9 Months Ended
	Sep. 30, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Interest Rate Swap Agreements	10. Interest Rate Swap Agreements The following table summarizes the terms and fair value of the Partnerships’ interest rate swap agreements (in thousands, except percentages): Date Notional Fixed Effective Maturity Fair Value Asset (Liability) at Entered Value Rate Index Date Date September 30, 2021 December 31, 2020 June 12, 2017 $ 50,000 2.10 % 1-month USD LIBOR 3/2/2018 9/2/2024 $ (2,269 ) $ (3,381 ) September 29, 2020 60,000 0.18 1-month USD LIBOR 9/30/2020 11/15/2023 224 (9 ) December 30, 2020 40,000 0.21 1-month USD LIBOR 12/30/2020 11/15/2023 121 (45 ) $ (1,924 ) $ (3,435 ) During the three and nine months ended September 30, 2021, the Partnership recorded a gain of $0.2 million and $1.5 million, respectively, resulting from the change in fair value of the interest rate swap agreements, which is reflected as an unrealized gain (loss) on derivative financial instruments on the consolidated statements of operations. In June 2020, the Partnership used proceeds from the sale of the European outdoor advertising portfolio to terminate certain interest rate swap agreements for approximately $7.6 million including approximately $3.3 million for the GBP denominated interest rate swap agreement with a notional value of £38 million. As such, foreign currency transaction gain resulting from the changes in exchange rates affecting mark-to-market adjustments on the GBP interest rate swap agreement is presented as part of discontinued operations for prior period ( Note 8 The fair values of the interest rate swap agreements are derived based on Level 2 inputs. To illustrate the effect of movements in the interest rate market, the Partnership performed a market sensitivity analysis on its outstanding interest rate swap agreements. The Partnership applied various basis point spreads to the underlying interest rate curve of the derivative in order to determine the instrument’s change in fair value at September 30, 2021. The following table summarizes the fair value of the interest rate swaps as a result of the analysis performed (in thousands): The Fair Value As a Result of Changes in Interest Rates Date Entered Maturity Date +50 Basis Points -50 Basis Points +100 Basis Points -100 Basis Points June 12, 2017 9/2/2024 $ (1,607 ) $ (3,048 ) $ (906 ) $ (3,788 ) September 29, 2020 11/15/2023 829 (389 ) 1,426 (1,011 ) December 30, 2020 11/15/2023 524 (289 ) 922 (703 )

Equity

Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Equity	11. Equity The table below summarizes changes in the number of units outstanding (in units): Mezzanine Equity - Series A Series B Series C Common Preferred Preferred Preferred Balance as of December 31, 2019 25,353,140 1,722,041 2,544,793 1,988,700 Conversion of Series C Preferred Units 7,810 — — (6,000 ) Issuance under ATM Programs 109,724 64,734 84,139 — Unit-based compensation 7,368 — — — Balance as of September 30, 2020 25,478,042 1,786,775 2,628,932 1,982,700 Balance as of December 31, 2020 25,478,042 1,788,843 2,628,932 1,982,700 Unit-based compensation 10,950 — — — Balance as of September 30, 2021 25,488,992 1,788,843 2,628,932 1,982,700 On December 4, 2019, the Partnership filed a universal shelf registration statement on Form S-3 with the SEC. The shelf registration statement was declared effective by the SEC on January 30, 2020 and permits us to issue and sell, from time to time, common and preferred units representing limited partner interests in us, and debt securities up to an aggregate amount of $750.0 million. Common Units On May 3, 2019, the Partnership established a Common Unit at-the-market offering program (the “2019 Common Unit ATM Program”) pursuant to which we may sell, from time to time, Common Units having an aggregate offering price of up to $50.0 million pursuant to our previously filed and effective registration statement on Form S-3. The net proceeds from sales under the 2019 Common Unit ATM Program will be used for general partnership purposes, which may include, among other things, the repayment of indebtedness and to potentially fund future acquisitions. During the nine months ended September 30, 2020, 109,724 Common Units were issued under the 2019 Common Unit ATM Program generating proceeds of approximately $1.8 million before issuance costs. On February 28, 2020, the Partnership replaced the 2019 Common Unit ATM Program and established a new Common Unit at-the-market offering program (the “2020 Common Unit ATM Program”) pursuant to which we may sell, from time to time, Common Units having an aggregate offering price of up to $50.0 million pursuant to our previously filed and effective registration statement on Form S-3. The net proceeds from sales under the 2020 Common Unit ATM Program will be used for general partnership purposes, which may include, among other things, the repayment of indebtedness and to potentially fund future acquisitions. No Preferred Units On March 30, 2017, the Partnership established a Series B Preferred Unit at-the-market offering program (the “2017 Series B ATM Program”) pursuant to which we may sell, from time to time, Series B Preferred Units having an aggregate offering price of up to $50.0 million pursuant to our previously filed and effective registration statement on Form S-3. The net proceeds from sales under the 2017 Series B ATM Program will be used for general Partnership purposes, which may include, among other things, the repayment of indebtedness and to potentially fund future acquisitions. During the nine months ended September 30, 2020 On May 3, 2019, the Partnership established a Series A Preferred Unit at-the-market offering program (the “2019 Series A ATM Program”) pursuant to which we may sell, from time to time, Series A Preferred Units having an aggregate offering price of up to $50.0 million pursuant to our previously filed and effective registration statement on Form S-3. The net proceeds from sales under the 2019 Series A ATM Program will be used for general Partnership purposes, which may include, among other things, the repayment of indebtedness and to potentially fund future acquisitions. During the nine months ended September 30, 2020 On February 28, 2020, the Partnership replaced the 2019 Series A ATM Program and established a new Series A Preferred Unit at-the-market offering program (the “2020 Series A ATM Program”) pursuant to which we may sell, from time to time, Series A Preferred Units having an aggregate offering price of up to $50.0 million pursuant to our previously filed and effective registration statement on Form S-3. The net proceeds from sales under the 2020 Series A ATM Program will be used for general partnership purposes, which may include, among other things, the repayment of indebtedness and to potentially fund future acquisitions. During the nine months ended September 30, 2020, the Partnership issued 41,447 Series A Preferred Units under the 2020 Series A ATM Program, generating proceeds of approximately $1.0 million before issuance costs. No On February 28, 2020, the Partnership replaced the 2017 Series B ATM Program and established a new Series B Preferred Unit at-the-market offering program (the “2020 Series B ATM Program”) pursuant to which we may sell, from time to time, Series B Preferred Units having an aggregate offering price of up to $50.0 million pursuant to our previously filed and effective registration statement on Form S-3. The net proceeds from sales under the 2020 Series B ATM Program will be used for general partnership purposes, which may include, among other things, the repayment of indebtedness and to potentially fund future acquisitions. No Series B Preferred Units were issued under the 2020 Series B ATM Program during the nine months ended September 30, 2021 and 2020, respectively The Common Units ATM programs, the Series A ATM programs and the Series B ATM programs described above are collectively referred to the “ATM Programs.” Mezzanine Equity On April 2, 2018, the Partnership completed a public offering of 2,000,000 Series C Floating-to-Fixed Rate Cumulative Perpetual Redeemable Convertible Preferred Units (“Series C Preferred Units” and together with the Series A Preferred Units and the “Preferred Units”), representing limited partner interest in the Partnership, at a price of $25.00 per unit. We received net proceeds of approximately $47.5 million after deducting underwriters’ discounts and offering expenses paid by us of $2.5 million. We used substantially all net proceeds to repay a portion of the borrowings under our revolving credit facility. In connection with the closing of the Series C Preferred Units offering, the Partnership executed the Fourth Amended and Restated Agreement of Limited Partnership of Landmark Infrastructure Partners LP (the “Amended Partnership Agreement”) for the purpose of defining the preferences, rights, powers, and duties of holders of the Series C Preferred Units. Distributions on the Series C Preferred Units are cumulative from the date of original issue and will be payable quarterly in arrears on the 15th day of February, May, August and November of each year, when, as and if declared by the board of directors of our General Partner. The initial distribution on the Series C Preferred Units was paid on May 15, 2018 in an amount equal to $0.2090 per unit. Distributions accruing from, and including, the date of original issuance and to, but excluding May 15, 2025 will accrue at an annual rate equal to the greater of (i) 7.00% per annum, and (ii) the sum of (a) three-month LIBOR as calculated on each applicable date of determination and (b) 4.698% per annum, based on the $25.00 liquidation preference per Series C Preferred Unit. Distributions accruing on and after May 15, 2025 will accrue at 9.00% per annum of the stated liquidation preference. Holders of Series C Preferred Units, at their option, may, at any time and from time to time, convert some or all of their Series C Preferred Units based on an initial conversion rate of 1.3017 common units per Series C Preferred Unit. In the event of a fundamental change, holders of the Series C Preferred Units, at their option, may convert some or all of their Series C Preferred Units into the greater of (i) a number of common units plus a make-whole premium and (ii) a number of common units equal to the lessor of (a) the liquidation preference divided by the market value of our common units on the effective date of such fundamental change and (b) 11.13 (subject to adjustments). On May 15, 2025, May 15, 2028, and each subsequent five-year At any time on or after May 20, 2025, the Partnership shall have the option to redeem the Series C Preferred Units, in whole or in part, at a redemption price of $25.00 per Series C Preferred Unit plus an amount equal to all accumulated and unpaid distributions thereon to the date of redemption, whether or not declared. The Partnership has classified the Series C Preferred Units as mezzanine equity in the accompanying consolidated balance sheets based upon the terms and conditions of the holder’s redemption option. Issuance costs related to the Series C Preferred Units classified as mezzanine equity are initially recorded as a reduction of the units’ balances and accreted up to the redemption value. During the nine months ended September 30, 2020, Distributions The table below summarizes the quarterly distributions related to our quarterly financial results: Total Distribution Distribution Quarter Ended Declaration Date Distribution Date Per Unit (in thousands) Common Units September 30, 2020 October 23, 2020 November 13, 2020 $ 0.2000 $ 5,096 December 31, 2020 January 22, 2021 February 12, 2021 0.2000 5,098 March 31, 2021 April 23, 2021 May 14, 2021 0.2000 5,098 June 30, 2021 July 23, 2021 August 13, 2021 0.2000 5,098 September 30, 2021 October 22, 2021 November 12, 2021 0.2000 5,098 Series A Preferred Units September 30, 2020 September 18, 2020 October 15, 2020 $ 0.5000 $ 893 December 31, 2020 December 22, 2020 January 15, 2021 0.5000 894 March 31, 2021 March 19, 2021 April 15, 2021 0.5000 894 June 30, 2021 June 18, 2021 July 15, 2021 0.5000 894 September 30, 2021 September 20, 2021 October 15, 2021 0.5000 894 Series B Preferred Units September 30, 2020 October 22, 2020 November 16, 2020 $ 0.4938 $ 1,298 December 31, 2020 January 21, 2021 February 16, 2021 0.4938 1,298 March 31, 2021 April 22, 2021 May 17, 2021 0.4938 1,298 June 30, 2021 July 22, 2021 August 16, 2021 0.4938 1,298 September 30, 2021 October 21, 2021 November 15, 2021 0.4938 1,298 Series C Preferred Units September 30, 2020 October 22, 2020 November 16, 2020 $ 0.4375 $ 867 December 31, 2020 January 21, 2021 February 16, 2021 0.4375 867 March 31, 2021 April 22, 2021 May 17, 2021 0.4375 867 June 30, 2021 July 22, 2021 August 16, 2021 0.4375 867 September 30, 2021 October 21, 2021 November 15, 2021 0.4375 867

Net Income (Loss) Per Limited P

Net Income (Loss) Per Limited Partner Unit	9 Months Ended
	Sep. 30, 2021
Earnings Per Unit [Abstract]
Net Income (Loss) Per Limited Partner Unit	12. Net Income (Loss) Per Limited Partner Unit The General Partner’s incentive distribution rights meet the definition of a participating security and therefore we are required to compute income per unit using the two-class method under which any excess of distributions declared over net income shall be allocated to the partners based on their respective sharing of income specified in the Amended Partnership Agreement. Payments made to our unitholders are determined in relation to actual distributions declared and are not based on the net income (loss) allocations used in the calculation of net income (loss) per unit. Net income (loss) per unit applicable to limited partners is computed by dividing limited partners’ interest in net income (loss), after deducting any Preferred Unit distributions and General Partner incentive distributions, by the weighted-average number of outstanding common units. Diluted net income (loss) per unit includes the effects of potentially dilutive units on our common units. The calculation of the undistributed net income (loss) attributable to common unitholders for the three and nine months ended September 30, 2021 and 2020 is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Income from continuing operations $ 2,174 $ 5,829 $ 13,571 $ 5,579 Less: Net income attributable to noncontrolling interest 8 8 24 24 Income from continuing operations attributable to limited partners 2,166 5,821 13,547 5,555 Income (loss) from discontinued operations, net of tax — (171 ) — 17,340 Net income attributable to limited partners 2,166 5,650 13,547 22,895 Less: Distributions declared on Preferred Units (3,060 ) (3,055 ) (9,180 ) (9,152 ) Accretion of Series C preferred units (96 ) (96 ) (286 ) (289 ) Net income (loss) attributable to common unitholders (990 ) 2,499 4,081 13,454 Distributions declared on common units (5,098 ) (5,096 ) (15,294 ) (15,288 ) Undistributed net loss (6,088 ) (2,597 ) (11,213 ) (1,834 ) Undistributed income (loss) from discontinued operations — (171 ) — 17,340 Undistributed loss from continuing operations $ (6,088 ) $ (2,426 ) $ (11,213 ) $ (19,174 ) The calculation of net income per common unit for the three months ended September 30, 2021 and 2020 is as follows (in thousands, except per unit data): Three Months Ended September 30, 2021 2020 Distributions declared $ 5,098 $ 5,096 Undistributed net loss from continuing operations (6,088 ) (2,426 ) Income (loss) from continuing operations attributable to common units - basic (990 ) 2,670 Loss from discontinued operations attributable to common units - basic — (171 ) Net income (loss) attributable to common units - basic (990 ) 2,499 Income (loss) from continuing operations attributable to common units - diluted (990 ) 2,670 Loss from discontinued operations attributable to common units - diluted — (171 ) Net income (loss) attributable to common units - diluted $ (990 ) $ 2,499 Weighted-average units outstanding: Basic 25,489 25,478 Diluted 25,489 25,478 Income (loss) from continuing operations per common unit: Basic $ (0.04 ) $ 0.10 Diluted (1) $ (0.04 ) $ 0.10 Loss from discontinued operations per common unit: Basic $ — $ (0.01 ) Diluted (1) $ — $ (0.01 ) Net income (loss) per common unit: Basic $ (0.04 ) $ 0.10 Diluted (1) $ (0.04 ) $ 0.10 (1) Diluted earnings per unit takes into account the potential dilutive effect of common units that could be issued by the Partnership in conjunction with the Series C Preferred Units conversion features. Potential common unit equivalents are anti-dilutive for the three months ended September 30, 2021 and 2020, and, as a result, have been excluded in the determination of diluted earnings per common unit. The calculation of net income per common unit for the nine months ended September 30, 2021 and 2020 is as follows (in thousands, except per unit data): Nine Months Ended September 30, 2021 2020 Distributions declared $ 15,294 $ 15,288 Undistributed net loss from continuing operations (11,213 ) (19,174 ) Income (loss) from continuing operations attributable to common units - basic 4,081 (3,886 ) Income from discontinued operations attributable to common units - basic — 17,340 Net income attributable to common units - basic 4,081 13,454 Income (loss) from continuing operations attributable to common units - diluted 4,081 (3,886 ) Income from discontinued operations attributable to common units - diluted — 17,340 Net income attributable to common units - diluted $ 4,081 $ 13,454 Weighted-average units outstanding: Basic 25,489 25,472 Diluted 25,489 25,472 Income (loss) from continuing operations per common unit: Basic $ 0.16 $ (0.15 ) Diluted (1) $ 0.16 $ (0.15 ) Income from discontinued operations per common unit: Basic $ — $ 0.68 Diluted (1) $ — $ 0.68 Net income per common unit: Basic $ 0.16 $ 0.53 Diluted (1) $ 0.16 $ 0.53 (1) Diluted earnings per unit takes into account the potential dilutive effect of common units that could be issued by the Partnership in conjunction with the Series C Preferred Units conversion features. Potential common unit equivalents are anti-dilutive for the nine months ended September 30, 2021 and 2020, and, as a result, have been excluded in the determination of diluted earnings per common unit.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	13. Fair Value of Financial Instruments The fair value for certain financial instruments is derived using a combination of market quotes, pricing models and other valuation techniques that involve significant management judgment. The price transparency of financial instruments is a key determinant of the degree of judgment involved in determining the fair value of the Partnership’s financial instruments. Financial instruments for which actively quoted prices or pricing parameters are available and for which markets contain orderly transaction will generally have a higher degree of price transparency than financial instruments for which markets are inactive or consist of non‑orderly trades. The Partnership evaluates several factors when determining if a market is inactive or when market transactions are not orderly. The following is a summary of the methods and assumptions used by management in estimating the fair value of each class of assets and liabilities for which it is practicable to estimate the fair value: Cash and cash equivalents, rent receivables, net and accounts payable and accrued liabilities : The carrying values of these balances approximate their fair values because of the short‑term nature of these instruments. Revolving credit facility : The fair value of the Partnership’s revolving credit facility is estimated using a discounted cash flow analysis based on management’s estimates of current market interest rates for instruments with similar characteristics, including remaining loan term, loan‑to‑value ratio, type of collateral and other credit enhancements. Additionally, since a quoted price in an active market is generally not available for the instrument or an identical instrument, the Partnership measures fair value using a valuation technique that is consistent with the principles of fair value measurement which typically considers what management believes is a market participant rate for a similar instrument. The Partnership classifies these inputs as Level 3 inputs. The fair value of the Partnership’s revolving credit facility is considered to approximate the carrying value because the interest payments are based on LIBOR rates that reset every month. Secured Notes : The Partnership determines fair value of its secured notes utilizing various Level 2 sources including quoted prices and indicative quotes (non-binding quotes) from brokers that require judgment to interpret market information. Quotes from brokers require judgment and are based on the brokers’ interpretation of market information, including implied credit spreads for similar borrowings on recent trades or bid/ask prices or quotes from active markets if available. Investments in receivables : The Partnership’s investments in receivables are presented in the accompanying consolidated balance sheets at their amortized cost net of recorded reserves and not at fair value. The fair values of the receivables were estimated using an internal valuation model that considered the expected cash flow of the receivables and estimated yield requirements by market participants with similar characteristics, including remaining loan term, and credit enhancements. The Partnership classifies these inputs as Level 3 inputs. Interest rate swap agreements : The Partnership’s interest rate swap agreements are presented at fair value on the accompanying consolidated balance sheets. The valuation of these instruments is determined using a proprietary model that utilizes observable and unobservable inputs. A majority of the inputs are observable with the only unobservable inputs relating to the lack of performance risk on the part of the Partnership or the counter party to the instrument. As such, the Partnership classifies these inputs as Level 2 inputs. The proprietary model uses the contractual terms of the derivatives, including the period to maturity, as well as observable market‑based inputs, including the interest rate curves and volatility. The fair values of interest rate swaps are estimated using the market standard methodology of netting the discounted fixed cash payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of interest rates (forward curves) derived from observable market interest rate curves. In addition, credit valuation adjustments, which consider the impact of any credit risk to the contracts, are incorporated in the fair values to account for potential nonperformance risk. The table below summarizes the carrying amounts and fair values of financial instruments which are not carried at fair value on the face of the financial statements (in thousands): September 30, 2021 December 31, 2020 Carrying amount Fair Value Carrying amount Fair Value Investment in receivables, net $ 4,669 $ 4,710 $ 5,101 $ 5,105 Revolving credit facility 223,200 223,200 214,200 214,200 Secured Notes, net 275,845 285,575 279,677 298,097 Disclosure of the fair values of financial instruments is based on pertinent information available to the Partnership as of the period end and requires a significant amount of judgment. Despite increased capital market and credit market activity, transaction volume for certain financial instruments remains relatively low. This has made the estimation of fair values difficult and, therefore, both the actual results and the Partnership’s estimate of value at a future date could be materially different. As of September 30, 2021 and December 31, 2020, the Partnership measured the following assets at fair value on a recurring basis (in thousands): September 30, 2021 December 31, 2020 Derivative Assets (1) $ 345 $ — Derivative Liabilities (1) 2,269 3,435 (1) Fair value is calculated using level 2 inputs. Level 2 inputs are quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model‑derived valuations in which significant inputs and significant value drivers are observable in active markets.

Related-Party Transactions

Related-Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related-Party Transactions	14. Related‑Party Transactions General and Administrative Reimbursement Under the Amended Partnership Agreement, we are required to reimburse our general partner and its affiliates for all costs and expenses that they incur on our behalf for managing and controlling our business and operations. Except to the extent specified under our amended Omnibus Agreement with Landmark (“Omnibus Agreement”), which was amended on January 30, 2019, our general partner determines the amount of these expenses and such determinations must be made in good faith under the terms of the Amended Partnership Agreement. Under the amended Omnibus Agreement, we are required to reimburse Landmark for expenses related to certain general and administrative services Landmark provides to us in support of our business, subject to a quarterly cap equal to 3% of our revenue during the current calendar quarter. This cap on expenses will last until the earlier to occur of: (i) the date on which our revenue for the immediately preceding four consecutive fiscal quarters exceeded $120 million and (ii) November 19, 2021. The full amount of general and administrative expenses incurred will be reimbursed by Landmark and reflected on our income statements, and to the extent such general and administrative expenses exceed the cap amount, the amount of such excess will be reflected in our financial statements as a capital contribution rather than as a reduction of our general and administrative expenses, except for expenses that would otherwise be allocated to us, which are not included in the amount of general and administrative expenses. These expenses include salary, bonus, incentive compensation and other amounts paid to persons who perform services for us or on our behalf and expenses allocated to our general partner by its affiliates Our Sponsor has informed us that it intends to let the cap expire on November 19, 2021 and will seek reimbursement for costs and expenses it incurs for services provided to the Partnership in accordance with the Amended Partnership Agreement. For the three and nine months ended September 30, 2020, Landmark reimbursed us $0.3 million and $2.2 million, respectively, for expenses related to certain general and administrative expenses that exceeded the cap. During the , $0.1 million and $0.2 million, respectively, of management fees related to our unconsolidated joint venture that is not subject to the cap and is treated as a capital contribution from Sponsor. Patent License Agreement We entered into a Patent License Agreement (“License Agreement”) with American Infrastructure Funds, LLC (“AIF”), an affiliate of the controlling member of Landmark. Under the License Agreement, AIF granted us a nonexclusive, perpetual license to practice certain patented methods related to the apparatus and method for combining easements under a master limited partnership. We have agreed to pay AIF a license fee of $50,000 for the second year of the License Agreement, and thereafter, an amount equal to the greater of (i) one‑tenth of one percent (0.1%) of our gross revenue received during such contract year; or (ii) $100,000. During the nine months ended September 30, 2021, we incurred $41,667 of license fees related to the AIF patent license agreement. During the three and nine months ended September 30, 2020, we incurred $25,000 and $75,000, respectively, of license fees related to the AIF patent license agreement. The License Agreement with AIF was terminated in connection with the transaction with on June 2, 2021. Secured Tenant Site Assets’ Management Fee In connection with the issuance of the Secured Notes, the Partnership entered into applicable management agreements with the General Partner. Pursuant to the applicable management agreements, our General Partner will perform those functions reasonably necessary to maintain, manage and administer the Secured Tenant Site Assets for a monthly management fee equal to 1.5% of the Secured Tenant Site Assets’ operating revenue, as defined by the applicable management agreements for the 2017 secured notes, 0.5% of operating revenue for the 4.38% senior secured notes and 2% of gross revenue for the 2019 secured notes. The Secured Tenant Site Assets’ management fee to Landmark will be treated as a capital distribution to Landmark. Landmark will reimburse us for the fees paid with the reimbursement treated as a capital contribution. We incurred less than $0.1 million and $0.1 million of Secured Tenant Site Assets’ management fees during the three and nine months ended September 30, 2021 and 2020, respectively. In connection with the formation of the unconsolidated JV, the JV assumed the 2018 Secured Notes. Pursuant to the applicable management agreement, our General Partner will perform those functions reasonably necessary to maintain, manage and administer the 2018 Secured Tenant Site Assets for a monthly management fee equal to 1.5% of the Secured Tenant Site Assets’ operating revenue, subject to a maximum of $46 per tenant site asset. Landmark will reimburse us for the management fees paid by the unconsolidated JV with the reimbursement treated as a capital contribution. For the three and nine months ended September 30, 2021 and 2020, the unconsolidated JV incurred $0.1 million and $0.2 million of management fees, respectively. Acquisition of Real Property Interests In connection with third party acquisitions, Landmark will be obligated to provide acquisition services to us, including asset identification, underwriting and due diligence, negotiation, documentation and closing, at the reasonable request of our General Partner, but we are under no obligation to utilize such services. We will pay Landmark reasonable fees, as mutually agreed to by Landmark and us, for providing these services. These fees will not be subject to the cap on general and administrative expenses described above. During the three and nine months ended September 30, 2021, no such fees were incurred. During the three and nine months ended September 30, 2020, the Partnership incurred $3.8 million of acquisition fees related to the third quarter 2020 direct acquisitions, respectively. Incentive Distribution Rights Cash distributions will be made to our General Partner in respect of its ownership of all IDRs, which entitle our General Partner to receive increasing percentages, up to a maximum of 50%, of the available cash we distribute from operating surplus (as defined in our Amended Partnership Agreement) in excess of $0.2875 per unit per quarter. During the three and nine months ended September 30, 2021 and 2020, no Due from Affiliates At September 30, 2021 and December 31, 2020, the General Partner and its affiliates owed $1.8 million and $1.3 million, respectively, to the Partnership primarily for the current quarter general and administrative reimbursement, unconsolidated JV management fees and for rents received on our behalf, offset by rents received on behalf of the unconsolidated JV.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Information	15. Segment Information The Partnership has the following four reportable segments: (i) wireless communication, (ii) digital infrastructure, (iii) outdoor advertising, and (iv) renewable power generation for all periods presented. The Partnership’s wireless communication segment consists of leasing infrastructure and real property interests and providing financing to companies in the wireless communication industry in the United States, Canada, and Australia. The Partnership’s digital infrastructure segment consists of leasing real property interests to enterprises and companies in the digital infrastructure industry in the United States and Canada. The Partnership’s outdoor advertising segment consists of leasing real property interests to companies in the outdoor advertising industry in the United States, Canada and Australia. The Partnership’s renewable power generation segment consists of leasing real property interests and providing financing to companies in the renewable power industry in the United States. Items that are not included in any of the reportable segments are included in the corporate category. The reportable segments are strategic business units that offer different products and services. They are commonly managed as all four businesses require similar marketing and business strategies. Because our tenant lease arrangements are mostly effectively triple net , we evaluate our segments based on revenue. We believe this measure provides investors relevant and useful information because it is presented on an unlevered basis. The statements of operations for the reportable segments are as follows: For the three months ended September 30, 2021 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 6,630 $ 4,904 $ 3,820 $ 2,051 $ — $ 17,405 Expenses Property operating 93 287 781 27 — 1,188 General and administrative — — — — 1,483 1,483 Transaction-related — — — — 3,295 3,295 Depreciation and amortization 1,821 1,350 1,785 123 — 5,079 Impairments 8 — — — — 8 Total expenses 1,922 1,637 2,566 150 4,778 11,053 Total other income and expenses 412 (52 ) 79 19 (4,716 ) (4,258 ) Net income (loss) before income tax benefit 5,120 3,215 1,333 1,920 (9,494 ) 2,094 Income tax benefit — — — — (80 ) (80 ) Net income (loss) $ 5,120 $ 3,215 $ 1,333 $ 1,920 $ (9,414 ) $ 2,174 For the three months ended September 30, 2020 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 6,465 $ 2,095 $ 3,679 $ 1,989 $ — $ 14,228 Expenses Property operating 28 71 191 70 — 360 General and administrative — — — — 768 768 Depreciation and amortization 1,682 743 1,263 120 — 3,808 Impairments — — 16 — — 16 Total expenses 1,710 814 1,470 190 768 4,952 Total other income and expenses 273 (3 ) (3 ) 20 (3,907 ) (3,620 ) Income (loss) from continuing operations before income tax benefit 5,028 1,278 2,206 1,819 (4,675 ) 5,656 Income tax benefit — — — — (173 ) (173 ) Income (loss) from continuing operations 5,028 1,278 2,206 1,819 (4,502 ) 5,829 Loss from discontinued operations, net of tax — — (171 ) — — (171 ) Net income (loss) $ 5,028 $ 1,278 $ 2,035 $ 1,819 $ (4,502 ) $ 5,658 For the nine months ended September 30, 2021 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 19,809 $ 14,654 $ 11,467 $ 6,329 $ — $ 52,259 Expenses Property operating 200 889 1,764 113 — 2,966 General and administrative — — — — 3,915 3,915 Transaction-related — — — — 3,421 3,421 Depreciation and amortization 5,428 4,058 5,016 369 — 14,871 Impairments 8 — 27 — — 35 Total expenses 5,636 4,947 6,807 482 7,336 25,208 Total other income and expenses (491 ) (164 ) 189 58 (13,152 ) (13,560 ) Net income (loss) before income tax benefit 13,682 9,543 4,849 5,905 (20,488 ) 13,491 Income tax benefit — — — — (80 ) (80 ) Net income (loss) $ 13,682 $ 9,543 $ 4,849 $ 5,905 $ (20,408 ) $ 13,571 For the nine months ended September 30, 2020 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 19,136 $ 5,209 $ 11,486 $ 6,062 $ — $ 41,893 Expenses Property operating 231 263 610 119 — 1,223 General and administrative — — — — 3,479 3,479 Transaction-related — — — — 91 91 Depreciation and amortization 5,967 1,866 3,518 360 — 11,711 Impairments 78 — 122 — — 200 Total expenses 6,276 2,129 4,250 479 3,570 16,704 Total other income and expenses 1,341 (3 ) (3 ) 57 (21,510 ) (20,118 ) Income (loss) from continuing operations before income tax benefit 14,201 3,077 7,233 5,640 (25,080 ) 5,071 Income tax benefit — — — — (508 ) (508 ) Income (loss) from continuing operations 14,201 3,077 7,233 5,640 (24,572 ) 5,579 Income from discontinued operations, net of tax — — 17,340 — — 17,340 Net income (loss) $ 14,201 $ 3,077 $ 24,573 $ 5,640 $ (24,572 ) $ 22,919 The Partnership’s total assets by segment were (in thousands): September 30, 2021 December 31, 2020 Segments Wireless communication $ 348,603 $ 354,457 Digital infrastructure 214,081 216,849 Outdoor advertising 209,277 204,990 Renewable power generation 99,759 99,881 Corporate assets 19,433 18,601 Total assets $ 891,153 $ 894,778 The following table represents the Partnership’s rental revenues by geographic location (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 United States $ 16,430 $ 13,861 $ 49,478 $ 40,913 Australia 425 312 1,110 888 Canada 550 55 1,671 92 Total rental revenue $ 17,405 $ 14,228 $ 52,259 $ 41,893 The following table represents the Partnership’s total assets by geographic location (in thousands). September 30, 2021 December 31, 2020 United States $ 846,115 $ 852,088 Australia 17,638 17,533 Canada 27,400 25,157 Total assets $ 891,153 $ 894,778

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	16. Commitments and Contingencies The Partnership’s commitments and contingencies include customary claims and obligations incurred in the normal course of business. In the opinion of management, these matters will not have a material effect on the Partnership’s consolidated financial position. There has been consolidation in the wireless communication industry historically that has led to certain lease terminations. The past consolidation in the wireless industry has led to rationalization of wireless networks and reduced demand for tenant sites. On April 1, 2020, T-Mobile and Sprint completed their merger. As a result of the T-Mobile and Sprint merger, we have received termination notices related to 25 T-Mobile and Sprint tenant sites. As of September 30, 2021, seven tenant As of September 30, 2021, the Partnership had approximately $62.0 million of real property interests subject to subordination to lenders of the underlying property. To the extent a lender forecloses on a property the Partnership would take impairment charges for the book value of the asset and no longer be entitled to the revenue associated with the asset. Substantially all of our tenant sites are subject to triple net or effectively triple-net lease arrangements, which require the tenant or the underlying property owner to pay all utilities, property taxes, insurance and repair and maintenance costs. Our overall financial results could be impacted to the extent the owners of the fee interest in the real property or our tenants do not satisfy their obligations.

Tenant Concentration

Tenant Concentration	9 Months Ended
	Sep. 30, 2021
Risks And Uncertainties [Abstract]
Tenant Concentration	17. Tenant Concentration For the three and nine months ended September 30, 2021 and 2020, the Partnership had the following tenant revenue concentrations: Three Months Ended September 30, Nine Months Ended September 30, Tenant 2021 2020 2021 2020 Sungard 10.6 % 6.0 % 10.9 % 4.8 % T-Mobile 10.4 % 14.6 % 10.5 % 14.7 % Clear Channel 8.8 % 10.8 % 8.8 % 11.2 % Most tenants are subsidiaries of these companies but have been aggregated for purposes of showing revenue concentration. Financial information for publicly traded companies can be found at www.sec.gov. The loss of any one of our large customers as a result of consolidation, merger, bankruptcy, insolvency, network sharing, roaming, joint development, resale agreements by our customers or otherwise may result in (1) a material decrease in our revenue, (2) uncollectible account receivables, (3) an impairment of our deferred site rental receivables, wireless infrastructure assets, site rental contracts or customer relationships intangible assets, or (4) other adverse effects to our business.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	9 Months Ended
	Sep. 30, 2021
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	18. Supplemental Cash Flow Information Noncash investing and financing activities for the nine months ended September 30, 2021 and 2020 were as follows (in thousands): Nine Months Ended September 30, 2021 2020 Capital contribution to fund general and administrative expense reimbursement $ 1,050 $ 425 Distributions payable to preferred unitholders 1,836 1,835 Accretion of Series C preferred units 286 289 Conversion of Series C preferred units — 150 Purchase price for acquisitions and development activities included in accounts payable and accrued liabilities 659 336 Assumption of PACE Special Assessment loan — 3,354 Initial recognition of lease liabilities related to right of use assets 77 — Adoption of ASU 2016-13 — (76 ) Net cash provided by operating activities of discontinued operations — 3,293 Net cash provided by investing activities of discontinued operations — 115,868 Net cash used in financing activities of discontinued operations — (54,185 ) Cash flows related to interest and income taxes paid were as follows (in thousands): Nine Months Ended September 30, 2021 2020 Cash paid for interest $ 12,945 $ 11,813 Capitalized interest 1,043 1,601 Income taxes paid 241 543

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	19. Subsequent Events On October 13, 2021, certain subsidiaries of the Partnership entered into an indenture pursuant to which such subsidiaries issued and sold $172.5 million aggregate principal amount of securities of Secured Data Center Revenue Term Notes, Series 2021-1, consisting of Class A-2 notes in a private placement (the “2021-1 Secured Notes”). The 2021-1 Secured Notes mature on September 15, 2028 and require interest-only payments. The net proceeds and available cash were used to pay down the revolving credit facility by $168.2 million and terminate an existing interest rate swap agreement with a notional value of $50 million for $2.0 million.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidated Financial Statements	Basis of Presentation and Principles of Consolidated Financial Statements On an ongoing basis, we evaluate each legal entity that is not wholly owned by us in accordance with the consolidation guidance. The accompanying consolidated financial statements include the accounts of the Partnership, its wholly-owned subsidiaries and those entities in which it has a controlling interest. Investments in entities that the Partnership does not control are accounted for using the equity or cost method, depending upon the Partnership’s ability to exercise significant influence over operating and financial policies. The unaudited interim consolidated financial statements have been prepared in conformity with GAAP as established by the Financial Accounting Standards Board (the “FASB”) in the Accounting Standards Codification (“ASC”) including modifications issued under the Accounting Standards Updates (“ASUs”) and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The accompanying unaudited financial statements include, in our opinion, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the unaudited financial information set forth therein. Financial information for the three and nine months ended September 30, 2021 and 2020 included in these Notes to the Consolidated Financial Statements is derived from our unaudited financial statements. Certain notes and other information have been condensed or omitted from the interim financial statements included in this report. Operating results for the three and nine months ended September 30, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. All references to tenant sites are outside the scope of our independent registered public accounting firm’s review of our financial statements in accordance with the public company accounting oversight board (U.S.).
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements, in conformity with GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Income Taxes	Income Taxes The Partnership is generally not subject to federal, state or local income taxes, except for our subsidiary Landmark Infrastructure Asset OpCo LLC (“Asset OpCo”) and our foreign subsidiaries. Each limited partner is responsible for the tax liability, if any, related to its proportionate share of the Partnerships’ taxable income or loss. Asset OpCo conducts certain activities that may not generate qualifying income and will be treated as a corporation for U.S. federal income tax purposes. Asset OpCo and certain consolidated foreign subsidiaries of the Partnership conduct certain activities in international locations that generate taxable income and will be treated as taxable entities. Additionally, our consolidated REIT subsidiary, Landmark Infrastructure Inc., a Delaware corporation, files as a corporation for U.S. federal income tax purposes. The REIT Subsidiary has elected to be treated as a REIT and we believe that it has operated in a manner that has allowed the REIT Subsidiary to qualify as a REIT for federal income tax purposes, and the REIT Subsidiary intends to continue operating in such manner. If the REIT Subsidiary fails to qualify as a REIT in any taxable year, and is unable to avail itself of certain savings provisions, all of its taxable income would be subject to federal income tax at regular corporate rates. The Partnership may also be subject to various non-income taxes, filing fees, and franchise taxes in various states that are reflected in operating expenses. The Partnership follows the requirements of ASC Topic 740, Income Taxes
Investment in Unconsolidated Joint Venture	Investment in Unconsolidated Joint Venture The Partnership accounts for its investment in an unconsolidated joint venture using the equity method of accounting. Under the equity method, the investment is initially recorded at fair value and subsequently adjusted for distributions and the Partnership’s proportionate share of equity in the joint venture’s income (loss). The Partnership recognizes its proportionate share of the ongoing income or loss of the unconsolidated joint venture as equity income (loss) from unconsolidated joint venture on the consolidated statements of operations. On a quarterly basis, the Partnership evaluates its investment in an unconsolidated joint venture for other-than-temporary impairments.
Discontinued Operations	Discontinued Operations If the disposition of a component, being an operating or reportable segment, business unit, subsidiary or asset group, represents a strategic shift that has or will have a major effect on the Partnership’s operations and financial results, the operating profits or losses of the component disposed of by sale or when classified as held for sale, and the gain or loss upon disposition of the component, are presented as discontinued operations in the statements of operations. On June 17, 2020, the Partnership completed the sale of its interest in the consolidated joint venture that held its European outdoor advertising portfolio for a purchase price of £95 million. As a result, the sale of the European outdoor advertising portfolio represented a strategic shift that had a major effect on the Partnership’s operations and financial results and met the criteria as discontinued operations in June 2020. Accordingly, for prior period presented, the related operating results, including interest expense and unrealized loss on the interest rate swap agreement denominated in GBP, are presented as income from discontinued operations on the consolidated statement of operations ( Note 8
Recently Issued Accounting Standards	Recently Issued Accounting Standards Changes to GAAP are established by the FASB in the form of ASUs to the FASB’s ASC. The Partnership considers the applicability and impact of all ASUs. Newly issued ASUs are not expected to have a material impact on its consolidated financial position and results of operations because either the ASU is not applicable, or the impact is expected to be immaterial.

Acquisitions and Developments (

Acquisitions and Developments (Tables)	9 Months Ended
	Sep. 30, 2021
Business Acquisition [Line Items]
Summary of Information about Other Lease Related Balances	The following table illustrates information about other lease related balances as of September 30, 2021 and December 31, 2020 (in thousands): September 30, 2021 December 31, 2020 Operating leases: Right-of-use asset $ 10,232 $ 10,716 Operating lease liability 8,563 8,818 Finance leases: Right-of-use asset (1) $ 2,838 $ 1,229 Finance lease liability 70 — (1) Assets held under finance leases are recorded in Real property interests and are depreciated over the lease term.
Schedule of Future Minimum Ground Lease Payments	The following table represents the future minimum ground lease payments as of September 30, 2021 (in thousands): Operating Lease Finance Lease 2021 (three months) $ 152 $ 2 2022 611 9 2023 623 9 2024 632 9 2025 644 9 Thereafter 11,622 45 Total future payments 14,284 83 Discount (5,721 ) (13 ) Total lease liability $ 8,563 $ 70
Third Party Acquisitions
Business Acquisition [Line Items]
Schedule of Acquisitions	The following table presents direct third-party acquisitions, excluding transaction costs, completed by the Partnership during the nine months ended September 30, 2021 and for the year ended December 31, 2020. No. of Tenant Sites Consideration (in millions) Acquisition Description Wireless Communication Digital Infrastructure Outdoor Advertising Total Borrowings and Available Cash Total First Quarter International — — 1 1 $ 0.3 $ 0.3 Total — 1 1 $ 0.3 $ 0.3 Second Quarter International 3 — — 3 $ 1.3 $ 1.3 Total 3 — — 3 $ 1.3 $ 1.3 Third Quarter International 6 — — 6 $ 0.6 $ 0.6 Total 6 — — 6 $ 0.6 $ 0.6 2021 Total 9 — 1 10 $ 2.2 $ 2.2 First Quarter International — — 1 1 $ 0.1 $ 0.1 Total — — 1 1 $ 0.1 $ 0.1 Second Quarter International 6 — — 6 $ 1.3 $ 1.3 Total 6 — — 6 $ 1.3 $ 1.3 Third Quarter International — 1 — 1 $ 20.1 $ 20.1 Domestic — 6 — 6 107.7 107.7 Total — 7 — 7 $ 127.8 $ 127.8 Fourth Quarter Domestic — 1 — 1 $ 15.0 $ 15.0 Total — 1 — 1 $ 15.0 $ 15.0 2020 Total 6 8 1 15 $ 144.2 $ 144.2

Real Property Interests (Tables

Real Property Interests (Tables)	9 Months Ended
	Sep. 30, 2021
Real Estate [Abstract]
Summary of the Partnership's Real Property Interests	The following table summarizes the Partnership’s real property interests (in thousands): September 30, 2021 December 31, 2020 Land $ 117,556 $ 117,421 Building and site improvements 169,300 169,275 Real property interests – perpetual 101,372 101,785 Real property interests – finite life 415,785 399,179 Real property interests – ROU asset finance lease 2,838 1,229 Total real property interests 689,295 671,468 Construction in progress 40,043 44,787 Total land and real property interests 846,894 833,676 Accumulated depreciation and amortization of real property interests (76,744 ) (63,474 ) Land and net real property interests $ 770,150 $ 770,202
Summary of Final Allocations for Acquisitions and Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes final allocations for acquisitions made during the nine months ended September 30, 2021 and the year ended December 31, 2020 of estimated fair values of the assets acquired and liabilities assumed (in thousands). Investments in In-place Above-market real property lease lease ROU Lease Period Land interests intangibles intangibles asset liability Debt Total 2021 $ 504 $ — $ 88 $ 78 $ 1,650 $ (70 ) $ — $ 2,226 2020 9,338 144,672 45 — 748 — (3,354 ) 151,449
Schedule of Future Estimated Aggregate Depreciation and Amortization of Finite Lived Real Property Interests	Future estimated aggregate depreciation and amortization of finite-lived real property interests for each of the five succeeding fiscal years and thereafter as of September 30, 2021, are as follows (in thousands): 2021 (three months) $ 4,997 2022 18,832 2023 17,374 2024 17,066 2025 17,029 Thereafter 435,881 Total $ 511,179

Other Intangible Assets and L_2

Other Intangible Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2021
Other Intangible Assets And Liabilities [Abstract]
Summary of Identifiable Intangible Assets, Including Above/Below Market Lease Intangibles	The following table summarizes our identifiable intangible assets, including above/below‑market lease intangibles (in thousands): September 30, 2021 December 31, 2020 Acquired in-place lease Gross amount $ 26,826 $ 26,819 Accumulated amortization (11,444 ) (9,998 ) Net amount $ 15,382 $ 16,821 Acquired above-market leases Gross amount $ 6,631 $ 6,564 Accumulated amortization (4,295 ) (3,968 ) Net amount $ 2,336 $ 2,596 Total other intangible assets, net $ 17,718 $ 19,417 Acquired below-market leases Gross amount $ (16,785 ) $ (16,779 ) Accumulated amortization 11,731 10,698 Total other intangible liabilities, net $ (5,054 ) $ (6,081 )
Future Aggregate Amortization of Intangibles for Each of the Five Succeeding Fiscal Years and Thereafter	Future aggregate amortization of intangibles for each of the five succeeding fiscal years and thereafter as of September 30, 2021 follows (in thousands): Acquired in-place leases Acquired above-market leases Acquired below-market leases 2021 (three months) $ 491 $ 97 $ (334 ) 2022 1,919 353 (1,255 ) 2023 1,647 318 (813 ) 2024 1,533 294 (722 ) 2025 1,406 235 (423 ) Thereafter 8,386 1,039 (1,507 ) Total $ 15,382 $ 2,336 $ (5,054 )

Investments in Receivables (Tab

Investments in Receivables (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Receivable Net [Abstract]
Activity in investments in receivables	The following table reflects the activity in investments in receivables (in thousands): September 30, 2021 December 31, 2020 Investments in receivables – beginning $ 5,101 $ 5,653 Adoption of ASU 2016-13 — (53 ) Other — 7 Repayments (432 ) (506 ) Investments in receivables – ending $ 4,669 $ 5,101
Annual amounts due	Annual amounts due as of September 30, 2021, are as follows (in thousands): 2021 (three months) $ 265 2022 1,157 2023 1,260 2024 1,316 2025 780 Thereafter 4,705 Total $ 9,483 Interest $ 4,814 Principal 4,669 Total $ 9,483

Investment in Unconsolidated _2

Investment in Unconsolidated Joint Venture (Tables)	9 Months Ended
	Sep. 30, 2021
Equity Method Investments And Joint Ventures [Abstract]
Summary of Balance Sheet Information for Unconsolidated JV	The following table summarizes balance sheet information for the unconsolidated JV (in thousands): September 30, 2021 December 31, 2020 Total assets $ 242,985 $ 249,252 Total liabilities 122,611 124,034 Total equity 120,374 125,218 Total liabilities and equity $ 242,985 $ 249,252
Summary of Financial Information for Unconsolidated JV	The following table summarizes financial information for the unconsolidated JV (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Rental revenue $ 3,636 $ 3,643 $ 10,895 $ 10,773 Net income (loss) 658 496 (1,522 ) 2,170 Partnership's share in net income (loss) 329 248 (761 ) 1,085 Distributions declared to the Partnership 1,184 725 1,663 1,651

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2021
Discontinued Operations And Disposal Groups [Abstract]
Schedule of Income from Discontinued Operations in Connection with Sale	The following table presents income from discontinued operations in connection with the sale of the European outdoor advertising portfolio (in thousands): Three Months Ended Nine Months Ended September 30, 2020 September 30, 2020 Revenue Rental revenue from discontinued operations $ — $ 3,401 Expenses Property operating — 387 General and administrative — 211 Transaction-related — 341 Depreciation and amortization — 536 Total expenses from discontinued operations — 1,475 Other income and expenses Interest and other income — 105 Interest expense — (641 ) Unrealized loss on derivatives — (1,799 ) Gain (loss) on sale of real property interests (215 ) 15,508 Foreign currency transaction gain 86 2,721 Total other income and expenses from discontinued operations (129 ) 15,894 Income (loss) from discontinued operations before income tax expense (129 ) 17,820 Income tax expense 42 480 Income (loss) from discontinued operations $ (171 ) $ 17,340

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Partnership's debt	The following table summarizes the Partnership’s debt (in thousands): Outstanding Balance Maturity Date September 30, 2021 December 31, 2020 Revolving credit facility November 15, 2023 $ 223,200 $ 214,200 PACE Special Assessment loan February 14, 2038 $ 3,351 $ 3,480 4.38% senior secured notes June 30, 2036 35,952 37,686 Series 2019-1 Class A 3.90% January 14, 2027 170,000 170,000 Series 2017-1 Class A 4.10% November 15, 2022 (1) 54,261 56,676 Series 2017-1 Class B 3.81% November 15, 2022 (1) 16,539 16,816 Secured Notes 280,103 284,658 Discount on Secured Notes (549 ) (831 ) Deferred loan costs (3,709 ) (4,150 ) Secured Notes, net $ 275,845 $ 279,677 (1) Maturity date reflects anticipated repayment date; final legal maturity is November 15, 2047.
Schedule of Secured Notes Annual Principal Payment Amounts Due	The secured notes’ annual principal payment amounts due as of September 30, 2021, are as follows (in thousands): 2021 (three months) $ 1,605 2022 (1) 72,527 2023 6,946 2024 7,293 2025 7,619 Thereafter (1) 184,113 Total $ 280,103 (1) Reflects anticipated repayment dates

Interest Rate Swap Agreements (

Interest Rate Swap Agreements (Tables)	9 Months Ended
	Sep. 30, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Table Summarizing Terms and Fair Value of Interest Rate Swaps	The following table summarizes the terms and fair value of the Partnerships’ interest rate swap agreements (in thousands, except percentages): Date Notional Fixed Effective Maturity Fair Value Asset (Liability) at Entered Value Rate Index Date Date September 30, 2021 December 31, 2020 June 12, 2017 $ 50,000 2.10 % 1-month USD LIBOR 3/2/2018 9/2/2024 $ (2,269 ) $ (3,381 ) September 29, 2020 60,000 0.18 1-month USD LIBOR 9/30/2020 11/15/2023 224 (9 ) December 30, 2020 40,000 0.21 1-month USD LIBOR 12/30/2020 11/15/2023 121 (45 ) $ (1,924 ) $ (3,435 )
Summary of Fair Value of Interest Rate Swaps as a Result of Analysis Performed	The following table summarizes the fair value of the interest rate swaps as a result of the analysis performed (in thousands): The Fair Value As a Result of Changes in Interest Rates Date Entered Maturity Date +50 Basis Points -50 Basis Points +100 Basis Points -100 Basis Points June 12, 2017 9/2/2024 $ (1,607 ) $ (3,048 ) $ (906 ) $ (3,788 ) September 29, 2020 11/15/2023 829 (389 ) 1,426 (1,011 ) December 30, 2020 11/15/2023 524 (289 ) 922 (703 )

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Schedule of changes in the number of units outstanding	The table below summarizes changes in the number of units outstanding (in units): Mezzanine Equity - Series A Series B Series C Common Preferred Preferred Preferred Balance as of December 31, 2019 25,353,140 1,722,041 2,544,793 1,988,700 Conversion of Series C Preferred Units 7,810 — — (6,000 ) Issuance under ATM Programs 109,724 64,734 84,139 — Unit-based compensation 7,368 — — — Balance as of September 30, 2020 25,478,042 1,786,775 2,628,932 1,982,700 Balance as of December 31, 2020 25,478,042 1,788,843 2,628,932 1,982,700 Unit-based compensation 10,950 — — — Balance as of September 30, 2021 25,488,992 1,788,843 2,628,932 1,982,700
Schedule of quarterly distributions related to quarterly financial results	The table below summarizes the quarterly distributions related to our quarterly financial results: Total Distribution Distribution Quarter Ended Declaration Date Distribution Date Per Unit (in thousands) Common Units September 30, 2020 October 23, 2020 November 13, 2020 $ 0.2000 $ 5,096 December 31, 2020 January 22, 2021 February 12, 2021 0.2000 5,098 March 31, 2021 April 23, 2021 May 14, 2021 0.2000 5,098 June 30, 2021 July 23, 2021 August 13, 2021 0.2000 5,098 September 30, 2021 October 22, 2021 November 12, 2021 0.2000 5,098 Series A Preferred Units September 30, 2020 September 18, 2020 October 15, 2020 $ 0.5000 $ 893 December 31, 2020 December 22, 2020 January 15, 2021 0.5000 894 March 31, 2021 March 19, 2021 April 15, 2021 0.5000 894 June 30, 2021 June 18, 2021 July 15, 2021 0.5000 894 September 30, 2021 September 20, 2021 October 15, 2021 0.5000 894 Series B Preferred Units September 30, 2020 October 22, 2020 November 16, 2020 $ 0.4938 $ 1,298 December 31, 2020 January 21, 2021 February 16, 2021 0.4938 1,298 March 31, 2021 April 22, 2021 May 17, 2021 0.4938 1,298 June 30, 2021 July 22, 2021 August 16, 2021 0.4938 1,298 September 30, 2021 October 21, 2021 November 15, 2021 0.4938 1,298 Series C Preferred Units September 30, 2020 October 22, 2020 November 16, 2020 $ 0.4375 $ 867 December 31, 2020 January 21, 2021 February 16, 2021 0.4375 867 March 31, 2021 April 22, 2021 May 17, 2021 0.4375 867 June 30, 2021 July 22, 2021 August 16, 2021 0.4375 867 September 30, 2021 October 21, 2021 November 15, 2021 0.4375 867

Net Income (Loss) Per Limited_2

Net Income (Loss) Per Limited Partner Unit (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Unit [Abstract]
Schedule of Calculation of Undistributed Net Income (Loss)	The calculation of the undistributed net income (loss) attributable to common unitholders for the three and nine months ended September 30, 2021 and 2020 is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Income from continuing operations $ 2,174 $ 5,829 $ 13,571 $ 5,579 Less: Net income attributable to noncontrolling interest 8 8 24 24 Income from continuing operations attributable to limited partners 2,166 5,821 13,547 5,555 Income (loss) from discontinued operations, net of tax — (171 ) — 17,340 Net income attributable to limited partners 2,166 5,650 13,547 22,895 Less: Distributions declared on Preferred Units (3,060 ) (3,055 ) (9,180 ) (9,152 ) Accretion of Series C preferred units (96 ) (96 ) (286 ) (289 ) Net income (loss) attributable to common unitholders (990 ) 2,499 4,081 13,454 Distributions declared on common units (5,098 ) (5,096 ) (15,294 ) (15,288 ) Undistributed net loss (6,088 ) (2,597 ) (11,213 ) (1,834 ) Undistributed income (loss) from discontinued operations — (171 ) — 17,340 Undistributed loss from continuing operations $ (6,088 ) $ (2,426 ) $ (11,213 ) $ (19,174 )
Calculation of Net Income per Common Unit	The calculation of net income per common unit for the three months ended September 30, 2021 and 2020 is as follows (in thousands, except per unit data): Three Months Ended September 30, 2021 2020 Distributions declared $ 5,098 $ 5,096 Undistributed net loss from continuing operations (6,088 ) (2,426 ) Income (loss) from continuing operations attributable to common units - basic (990 ) 2,670 Loss from discontinued operations attributable to common units - basic — (171 ) Net income (loss) attributable to common units - basic (990 ) 2,499 Income (loss) from continuing operations attributable to common units - diluted (990 ) 2,670 Loss from discontinued operations attributable to common units - diluted — (171 ) Net income (loss) attributable to common units - diluted $ (990 ) $ 2,499 Weighted-average units outstanding: Basic 25,489 25,478 Diluted 25,489 25,478 Income (loss) from continuing operations per common unit: Basic $ (0.04 ) $ 0.10 Diluted (1) $ (0.04 ) $ 0.10 Loss from discontinued operations per common unit: Basic $ — $ (0.01 ) Diluted (1) $ — $ (0.01 ) Net income (loss) per common unit: Basic $ (0.04 ) $ 0.10 Diluted (1) $ (0.04 ) $ 0.10 (1) Diluted earnings per unit takes into account the potential dilutive effect of common units that could be issued by the Partnership in conjunction with the Series C Preferred Units conversion features. Potential common unit equivalents are anti-dilutive for the three months ended September 30, 2021 and 2020, and, as a result, have been excluded in the determination of diluted earnings per common unit. The calculation of net income per common unit for the nine months ended September 30, 2021 and 2020 is as follows (in thousands, except per unit data): Nine Months Ended September 30, 2021 2020 Distributions declared $ 15,294 $ 15,288 Undistributed net loss from continuing operations (11,213 ) (19,174 ) Income (loss) from continuing operations attributable to common units - basic 4,081 (3,886 ) Income from discontinued operations attributable to common units - basic — 17,340 Net income attributable to common units - basic 4,081 13,454 Income (loss) from continuing operations attributable to common units - diluted 4,081 (3,886 ) Income from discontinued operations attributable to common units - diluted — 17,340 Net income attributable to common units - diluted $ 4,081 $ 13,454 Weighted-average units outstanding: Basic 25,489 25,472 Diluted 25,489 25,472 Income (loss) from continuing operations per common unit: Basic $ 0.16 $ (0.15 ) Diluted (1) $ 0.16 $ (0.15 ) Income from discontinued operations per common unit: Basic $ — $ 0.68 Diluted (1) $ — $ 0.68 Net income per common unit: Basic $ 0.16 $ 0.53 Diluted (1) $ 0.16 $ 0.53 (1) Diluted earnings per unit takes into account the potential dilutive effect of common units that could be issued by the Partnership in conjunction with the Series C Preferred Units conversion features. Potential common unit equivalents are anti-dilutive for the nine months ended September 30, 2021 and 2020, and, as a result, have been excluded in the determination of diluted earnings per common unit.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Table Summarizing the Carrying Amounts and Fair Values of Financial Instruments Which are Not Carried at Fair Value	The table below summarizes the carrying amounts and fair values of financial instruments which are not carried at fair value on the face of the financial statements (in thousands): September 30, 2021 December 31, 2020 Carrying amount Fair Value Carrying amount Fair Value Investment in receivables, net $ 4,669 $ 4,710 $ 5,101 $ 5,105 Revolving credit facility 223,200 223,200 214,200 214,200 Secured Notes, net 275,845 285,575 279,677 298,097
Assets and Liabilities Measured at Fair Value on a Recurring Basis	As of September 30, 2021 and December 31, 2020, the Partnership measured the following assets at fair value on a recurring basis (in thousands): September 30, 2021 December 31, 2020 Derivative Assets (1) $ 345 $ — Derivative Liabilities (1) 2,269 3,435 (1) Fair value is calculated using level 2 inputs. Level 2 inputs are quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model‑derived valuations in which significant inputs and significant value drivers are observable in active markets.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Schedule of Statement of Operations by Reportable Segment	For the three months ended September 30, 2021 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 6,630 $ 4,904 $ 3,820 $ 2,051 $ — $ 17,405 Expenses Property operating 93 287 781 27 — 1,188 General and administrative — — — — 1,483 1,483 Transaction-related — — — — 3,295 3,295 Depreciation and amortization 1,821 1,350 1,785 123 — 5,079 Impairments 8 — — — — 8 Total expenses 1,922 1,637 2,566 150 4,778 11,053 Total other income and expenses 412 (52 ) 79 19 (4,716 ) (4,258 ) Net income (loss) before income tax benefit 5,120 3,215 1,333 1,920 (9,494 ) 2,094 Income tax benefit — — — — (80 ) (80 ) Net income (loss) $ 5,120 $ 3,215 $ 1,333 $ 1,920 $ (9,414 ) $ 2,174 For the three months ended September 30, 2020 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 6,465 $ 2,095 $ 3,679 $ 1,989 $ — $ 14,228 Expenses Property operating 28 71 191 70 — 360 General and administrative — — — — 768 768 Depreciation and amortization 1,682 743 1,263 120 — 3,808 Impairments — — 16 — — 16 Total expenses 1,710 814 1,470 190 768 4,952 Total other income and expenses 273 (3 ) (3 ) 20 (3,907 ) (3,620 ) Income (loss) from continuing operations before income tax benefit 5,028 1,278 2,206 1,819 (4,675 ) 5,656 Income tax benefit — — — — (173 ) (173 ) Income (loss) from continuing operations 5,028 1,278 2,206 1,819 (4,502 ) 5,829 Loss from discontinued operations, net of tax — — (171 ) — — (171 ) Net income (loss) $ 5,028 $ 1,278 $ 2,035 $ 1,819 $ (4,502 ) $ 5,658 For the nine months ended September 30, 2021 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 19,809 $ 14,654 $ 11,467 $ 6,329 $ — $ 52,259 Expenses Property operating 200 889 1,764 113 — 2,966 General and administrative — — — — 3,915 3,915 Transaction-related — — — — 3,421 3,421 Depreciation and amortization 5,428 4,058 5,016 369 — 14,871 Impairments 8 — 27 — — 35 Total expenses 5,636 4,947 6,807 482 7,336 25,208 Total other income and expenses (491 ) (164 ) 189 58 (13,152 ) (13,560 ) Net income (loss) before income tax benefit 13,682 9,543 4,849 5,905 (20,488 ) 13,491 Income tax benefit — — — — (80 ) (80 ) Net income (loss) $ 13,682 $ 9,543 $ 4,849 $ 5,905 $ (20,408 ) $ 13,571 For the nine months ended September 30, 2020 (in thousands): Renewable Wireless Digital Outdoor Power Communication Infrastructure Advertising Generation Corporate Total Revenue Rental revenue $ 19,136 $ 5,209 $ 11,486 $ 6,062 $ — $ 41,893 Expenses Property operating 231 263 610 119 — 1,223 General and administrative — — — — 3,479 3,479 Transaction-related — — — — 91 91 Depreciation and amortization 5,967 1,866 3,518 360 — 11,711 Impairments 78 — 122 — — 200 Total expenses 6,276 2,129 4,250 479 3,570 16,704 Total other income and expenses 1,341 (3 ) (3 ) 57 (21,510 ) (20,118 ) Income (loss) from continuing operations before income tax benefit 14,201 3,077 7,233 5,640 (25,080 ) 5,071 Income tax benefit — — — — (508 ) (508 ) Income (loss) from continuing operations 14,201 3,077 7,233 5,640 (24,572 ) 5,579 Income from discontinued operations, net of tax — — 17,340 — — 17,340 Net income (loss) $ 14,201 $ 3,077 $ 24,573 $ 5,640 $ (24,572 ) $ 22,919
Schedule of Total Assets by Reportable Segment	The Partnership’s total assets by segment were (in thousands): September 30, 2021 December 31, 2020 Segments Wireless communication $ 348,603 $ 354,457 Digital infrastructure 214,081 216,849 Outdoor advertising 209,277 204,990 Renewable power generation 99,759 99,881 Corporate assets 19,433 18,601 Total assets $ 891,153 $ 894,778
Schedule of Rental Revenues by Geographic Location	The following table represents the Partnership’s rental revenues by geographic location (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 United States $ 16,430 $ 13,861 $ 49,478 $ 40,913 Australia 425 312 1,110 888 Canada 550 55 1,671 92 Total rental revenue $ 17,405 $ 14,228 $ 52,259 $ 41,893
Schedule of Total Assets by Geographic Location	The following table represents the Partnership’s total assets by geographic location (in thousands). September 30, 2021 December 31, 2020 United States $ 846,115 $ 852,088 Australia 17,638 17,533 Canada 27,400 25,157 Total assets $ 891,153 $ 894,778

Tenant Concentration (Tables)

Tenant Concentration (Tables)	9 Months Ended
	Sep. 30, 2021
Risks And Uncertainties [Abstract]
Schedule of Tenant Revenue Concentrations	For the three and nine months ended September 30, 2021 and 2020, the Partnership had the following tenant revenue concentrations: Three Months Ended September 30, Nine Months Ended September 30, Tenant 2021 2020 2021 2020 Sungard 10.6 % 6.0 % 10.9 % 4.8 % T-Mobile 10.4 % 14.6 % 10.5 % 14.7 % Clear Channel 8.8 % 10.8 % 8.8 % 11.2 %

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2021
Supplemental Cash Flow Information [Abstract]
Schedule of Noncash Investing and Financing Activities	Noncash investing and financing activities for the nine months ended September 30, 2021 and 2020 were as follows (in thousands): Nine Months Ended September 30, 2021 2020 Capital contribution to fund general and administrative expense reimbursement $ 1,050 $ 425 Distributions payable to preferred unitholders 1,836 1,835 Accretion of Series C preferred units 286 289 Conversion of Series C preferred units — 150 Purchase price for acquisitions and development activities included in accounts payable and accrued liabilities 659 336 Assumption of PACE Special Assessment loan — 3,354 Initial recognition of lease liabilities related to right of use assets 77 — Adoption of ASU 2016-13 — (76 ) Net cash provided by operating activities of discontinued operations — 3,293 Net cash provided by investing activities of discontinued operations — 115,868 Net cash used in financing activities of discontinued operations — (54,185 )
Schedule of Cash Flows Related to Interest and Income Taxes Paid	Cash flows related to interest and income taxes paid were as follows (in thousands): Nine Months Ended September 30, 2021 2020 Cash paid for interest $ 12,945 $ 11,813 Capitalized interest 1,043 1,601 Income taxes paid 241 543

Business (Details)

Business (Details) - Limited Partners - Common Units - $ / shares	Oct. 15, 2021	Sep. 30, 2021	Aug. 21, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Partnership Equity
Number of units held (in shares)		25,488,992		25,489,000	25,489,000	25,478,042	25,478,042	25,478,000	25,470,000	25,353,140
Landmark Dividend LLC | Definitive Transaction Agreement | Digital Bridge
Partnership Equity
Conversion price per common unit			$ 16.50
Landmark Dividend LLC | Subsequent Event
Partnership Equity
Number of units held (in shares)	5,066,408

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies - Discontinued Operations (Details) £ in Millions, $ in Millions	Jun. 17, 2020GBP (£)	Sep. 30, 2021USD ($)	Jun. 30, 2021USD ($)
Accounting Policies [Abstract]
Purchase price	£ 95	$ 0.2	$ 0.1

Acquisitions and Developments -

Acquisitions and Developments - Third Party Acquisitions - Summary of Acquisitions Completed (Details) $ in Millions	3 Months Ended							9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)site	Jun. 30, 2021USD ($)site	Mar. 31, 2021USD ($)site	Dec. 31, 2020USD ($)site	Sep. 30, 2020USD ($)site	Jun. 30, 2020USD ($)site	Mar. 31, 2020USD ($)site	Sep. 30, 2021USD ($)site	Dec. 31, 2020USD ($)site
Acquisitions
Number of tenant sites acquired								10	15
Consideration
Borrowings and Available Cash | $								$ 2.2	$ 144.2
Consideration | $								$ 2.2	$ 144.2
Wireless Communication
Acquisitions
Number of tenant sites acquired								9	6
Outdoor Advertising
Acquisitions
Number of tenant sites acquired								1	1
Digital Infrastructure
Acquisitions
Number of tenant sites acquired									8
International
Acquisitions
Number of tenant sites acquired	6	3	1		1	6	1
Consideration
Borrowings and Available Cash | $	$ 0.6	$ 1.3	$ 0.3		$ 20.1	$ 1.3	$ 0.1
Consideration | $	$ 0.6	$ 1.3	$ 0.3		$ 20.1	$ 1.3	$ 0.1
International | Wireless Communication
Acquisitions
Number of tenant sites acquired	6	3				6
International | Outdoor Advertising
Acquisitions
Number of tenant sites acquired			1				1
International | Digital Infrastructure
Acquisitions
Number of tenant sites acquired					1
2020 Direct Third Party Acquisitions, First Quarter
Acquisitions
Number of tenant sites acquired							1
Consideration
Borrowings and Available Cash | $							$ 0.1
Consideration | $							$ 0.1
2020 Direct Third Party Acquisitions, First Quarter | Outdoor Advertising
Acquisitions
Number of tenant sites acquired							1
2021 Direct Third Party Acquisitions, First Quarter
Acquisitions
Number of tenant sites acquired			1
Consideration
Borrowings and Available Cash | $			$ 0.3
Consideration | $			$ 0.3
2021 Direct Third Party Acquisitions, First Quarter | Outdoor Advertising
Acquisitions
Number of tenant sites acquired			1
2020 Direct Third Party Acquisitions, Second Quarter
Acquisitions
Number of tenant sites acquired						6
Consideration
Borrowings and Available Cash | $						$ 1.3
Consideration | $						$ 1.3
2020 Direct Third Party Acquisitions, Second Quarter | Wireless Communication
Acquisitions
Number of tenant sites acquired						6
2021 Direct Third Party Acquisitions, Second Quarter
Acquisitions
Number of tenant sites acquired	6	3
Consideration
Borrowings and Available Cash | $	$ 0.6	$ 1.3
Consideration | $	$ 0.6	$ 1.3
2021 Direct Third Party Acquisitions, Second Quarter | Wireless Communication
Acquisitions
Number of tenant sites acquired	6	3
Domestic
Acquisitions
Number of tenant sites acquired				1	6
Consideration
Borrowings and Available Cash | $				$ 15	$ 107.7
Consideration | $				$ 15	$ 107.7
Domestic | Digital Infrastructure
Acquisitions
Number of tenant sites acquired				1	6
2020 Direct Third Party Acquisitions, Third Quarter
Acquisitions
Number of tenant sites acquired					7
Consideration
Borrowings and Available Cash | $					$ 127.8
Consideration | $					$ 127.8
2020 Direct Third Party Acquisitions, Third Quarter | Digital Infrastructure
Acquisitions
Number of tenant sites acquired					7
2020 Direct Third Party Acquisitions, Fourth Quarter
Acquisitions
Number of tenant sites acquired				1
Consideration
Borrowings and Available Cash | $				$ 15
Consideration | $				$ 15
2020 Direct Third Party Acquisitions, Fourth Quarter | Digital Infrastructure
Acquisitions
Number of tenant sites acquired				1

Acquisitions and Developments_2

Acquisitions and Developments - Leases - General Information (Details)	Sep. 30, 2021	Dec. 31, 2020
Business Combinations [Abstract]
Lessee, weighted average discount rate	4.30%
Weighted-average remaining lease term of operating leases	10 years	8 years

Acquisitions and Developments_3

Acquisitions and Developments - Summary of Information about Other Lease Related Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Operating leases:
Right-of-use asset	$ 10,232	$ 10,716
Operating lease liability	8,563	8,818
Finance leases:
Right-of-use asset	2,838	$ 1,229
Finance lease liability	$ 70

Acquisitions and Developments_4

Acquisitions and Developments - Summary of Future Minimum Ground Lease Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Business Combinations [Abstract]
Operating Lease, 2021 (three months)	$ 152
Operating Lease, 2022	611
Operating Lease, 2023	623
Operating Lease, 2024	632
Operating Lease, 2025	644
Operating Lease, Thereafter	11,622
Operating Lease, Total future payments	14,284
Operating Lease, Discount	(5,721)
Operating Lease, Total lease liability	8,563	$ 8,818
Finance Lease, 2021 (three months)	2
Finance Lease, 2022	9
Finance Lease, 2023	9
Finance Lease, 2024	9
Finance Lease, 2025	9
Finance Lease, Thereafter	45
Finance Lease, Total future payments	83
Finance Lease, Discount	(13)
Finance Lease, Total lease liability	$ 70

Acquisitions and Developments_5

Acquisitions and Developments - Developments (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)Kiosk	Dec. 31, 2020USD ($)TowerKiosk
Business Acquisition [Line Items]
Construction in progress	$ 40,043	$ 44,787
Number of stealth towers | Tower		2
Smart Enabled Infrastructure
Business Acquisition [Line Items]
Construction in progress	$ 40,000	$ 44,800
DART
Business Acquisition [Line Items]
Number of Kiosks | Kiosk	157	112
Total other assets, placed in service	$ 17,200	$ 16,200

Real Property Interests - Summa

Real Property Interests - Summary of the Partnership's Real Property Interests (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Real Estate [Abstract]
Land	$ 117,556	$ 117,421
Building and site improvements	169,300	169,275
Real property interests – perpetual	101,372	101,785
Real property interests – finite life	415,785	399,179
Real property interests – ROU asset finance lease	2,838	1,229
Total real property interests	689,295	671,468
Construction in progress	40,043	44,787
Total land and real property interests	846,894	833,676
Accumulated depreciation and amortization of real property interests	(76,744)	(63,474)
Land and net real property interests	$ 770,150	$ 770,202

Real Property Interests - Sales

Real Property Interests - Sales (Details) £ in Millions, $ in Millions	Jun. 17, 2020GBP (£)	Sep. 30, 2021USD ($)	Jun. 30, 2021USD ($)site
Real Property Interests
Cash consideration received	£ 95	$ 0.2	$ 0.1
Gain (loss) on sale of real property interests, before income taxes | $		$ 0.1	$ 0.1
Number of tenant sites sold | site			2

Real Property Interests - Purch

Real Property Interests - Purchase Price Allocation (Details) - Measurement Input, Discount Rate	Sep. 30, 2021
Minimum
Acquisitions
Discount rate used to estimate fair values (as a percent)	6
Maximum
Acquisitions
Discount rate used to estimate fair values (as a percent)	20
Weighted Average
Acquisitions
Discount rate used to estimate fair values (as a percent)	8.5

Real Property Interests - Sum_2

Real Property Interests - Summary of Final Allocations for Acquisitions and Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - Landmark, General Partner and affiliates - Acquisition from related party - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair values of the assets acquired and liabilities assumed at the date of acquisition
Land	$ 504	$ 9,338
Investments in real property interests		144,672
ROU Assets	1,650	748
Lease Liability	(70)
Debt		(3,354)
Total	2,226	151,449
Acquired in-place leases
Fair values of the assets acquired and liabilities assumed at the date of acquisition
Lease intangibles, assets	88	$ 45
Acquired above-market leases
Fair values of the assets acquired and liabilities assumed at the date of acquisition
Lease intangibles, assets	$ 78

Real Property Interests - Sched

Real Property Interests - Schedule of Future Estimated Aggregate Depreciation and Amortization of Finite Lived Real Property Interests (Details) $ in Thousands	Sep. 30, 2021USD ($)
Future estimated aggregate amortization of real property interests
2021 (three months)	$ 4,997
2022	18,832
2023	17,374
2024	17,066
2025	17,029
Thereafter	435,881
Total	$ 511,179

Real Property Interests - Weigh

Real Property Interests - Weighted Average Remaining Depreciation and Amortization Period for Non-perpetual Real Property Interests (Details)	9 Months Ended
	Sep. 30, 2021
Real Estate [Abstract]
Weighted average remaining depreciation and amortization period for non-perpetual real property interests	36 years

Real Property Interests - Impai

Real Property Interests - Impairments (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)site	Sep. 30, 2020USD ($)site	Sep. 30, 2021USD ($)site	Sep. 30, 2020USD ($)site
Impairment
Recognized impairment charge	$ 8,000	$ 16,000	$ 35,000	$ 200,000
Impaired Real Property Interest
Impairment
Number of real property interests impaired | site	1	1	1	4
Recognized impairment charge				$ 200,000
Number of non-lease real property interest impaired | site		1
Impaired real property interests				$ 0
Impaired Real Property Interest | Maximum
Impairment
Recognized impairment charge	$ 100,000	$ 100,000	$ 100,000

Other Intangible Assets and L_3

Other Intangible Assets and Liabilities - Total Other Intangible Assets, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Intangible Assets
Net amount	$ 17,718	$ 19,417
Acquired in-place leases
Other Intangible Assets
Gross amount	26,826	26,819
Accumulated amortization	(11,444)	(9,998)
Net amount	15,382	16,821
Acquired above-market leases
Other Intangible Assets
Gross amount	6,631	6,564
Accumulated amortization	(4,295)	(3,968)
Net amount	$ 2,336	$ 2,596

Other Intangible Assets and L_4

Other Intangible Assets and Liabilities - Total Other Intangible Liabilities, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Acquired below-market leases
Below market lease intangibles	$ (16,785)	$ (16,779)
Accumulated amortization	11,731	10,698
Net amount	$ (5,054)	$ (6,081)

Other Intangible Assets and L_5

Other Intangible Assets and Liabilities - Amortization (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Intangible Assets And Liabilities [Abstract]
Amortization of above-and below-market leases, excluding amounts related to discontinued operations	$ 0.2	$ 0.2	$ 0.7	$ 0.7
Amortization expense excluding amounts related to discontinued operations	$ 0.5	$ 0.5	$ 1.5	$ 1.5

Other Intangible Assets and L_6

Other Intangible Assets and Liabilities - Future Aggregate Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Future amortization of lease intangibles
Net amount	$ 17,718	$ 19,417
Acquired in-place leases
Future amortization of lease intangibles
2021 (three months)	491
2022	1,919
2023	1,647
2024	1,533
2025	1,406
Thereafter	8,386
Net amount	15,382	16,821
Acquired above-market leases
Future amortization of lease intangibles
2021 (three months)	97
2022	353
2023	318
2024	294
2025	235
Thereafter	1,039
Net amount	$ 2,336	$ 2,596

Other Intangible Assets and L_7

Other Intangible Assets and Liabilities - Future Aggregate Amortization of Other Intangible Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Future amortization of acquired below-market leases
2021 (three months)	$ (334)
2022	(1,255)
2023	(813)
2024	(722)
2025	(423)
Thereafter	(1,507)
Net amount	$ (5,054)	$ (6,081)

Investments in Receivables - Ge

Investments in Receivables - General Information (Details) - USD ($) $ in Millions	Jul. 21, 2015	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Receivables With Imputed Interest [Line Items]
Interest income recognized		$ 0.1	$ 0.1	$ 0.3	$ 0.3
Minimum
Receivables With Imputed Interest [Line Items]
Payment collection period				2 years
Discount rate	7.00%
Maximum
Receivables With Imputed Interest [Line Items]
Payment collection period				99 years
Discount rate	14.00%

Investments in Receivables - Ac

Investments in Receivables - Activity in Investments in Receivables (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Receivables With Imputed Interest [Line Items]
Investments in receivables – beginning	$ 5,101	$ 5,653
Other		7
Repayments	(432)	(506)
Investments in receivables – ending	$ 4,669	5,101
ASU 2016-13 | Revision of Prior Period, Accounting Standards Update, Adjustment
Receivables With Imputed Interest [Line Items]
Adoption of ASU 2016-13		$ (53)

Investments in Receivables - An

Investments in Receivables - Annual Amounts Due (Details) $ in Thousands	Sep. 30, 2021USD ($)
Notes Receivable Net [Abstract]
2021 (three months)	$ 265
2022	1,157
2023	1,260
2024	1,316
2025	780
Thereafter	4,705
Total	$ 9,483

Investments in Receivables - _2

Investments in Receivables - Annual Amounts Due - Principal and Interest (Details) $ in Thousands	Sep. 30, 2021USD ($)
Notes Receivable Net [Abstract]
Interest	$ 4,814
Principal	4,669
Total	$ 9,483

Investment in Unconsolidated _3

Investment in Unconsolidated Joint Venture - Additional Information (Details) $ in Millions	Sep. 24, 2018USD ($)site	Sep. 30, 2021	Jun. 06, 2018USD ($)
Schedule Of Equity Method Investments [Line Items]
Aggregate principal amount			$ 125.4
Maximum
Schedule Of Equity Method Investments [Line Items]
Debt discount			$ 0.1
Series 2018-1 Class C 3.97%
Schedule Of Equity Method Investments [Line Items]
Interest rate (as a percent)		3.97%
Series 2018-1 Class D 4.70%
Schedule Of Equity Method Investments [Line Items]
Interest rate (as a percent)		4.70%
Series 2018-1 Class F 5.92%
Schedule Of Equity Method Investments [Line Items]
Interest rate (as a percent)		5.92%
Unconsolidated Joint Venture
Schedule Of Equity Method Investments [Line Items]
Number of tenant site assets contributed | site	545
Aggregate principal amount	$ 125.4
Percentage of membership interest in unconsolidated JV	50.01%
Cash transaction in unconsolidated JV	$ 65.5

Investment in Unconsolidated _4

Investment in Unconsolidated Joint Venture - Summary of Balance Sheet Information for Unconsolidated JV (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Total assets	$ 891,153			$ 894,778
Total liabilities	529,251			523,389
Total equity	313,714	$ 320,151	$ 322,211	323,487	$ 322,515	$ 323,256	$ 304,948	$ 321,658
Total liabilities, mezzanine equity and equity	891,153			894,778
Equity Method Investment | Unconsolidated Joint Venture
Schedule Of Equity Method Investments [Line Items]
Total assets	242,985			249,252
Total liabilities	122,611			124,034
Total equity	120,374			125,218
Total liabilities, mezzanine equity and equity	$ 242,985			$ 249,252

Investment in Unconsolidated _5

Investment in Unconsolidated Joint Venture - Summary of Financial Information for Unconsolidated JV (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Net income	$ 2,174	$ 5,658	$ 13,571	$ 22,919
Partnership's share in net income (loss)	329	248	(761)	1,085
Distributions declared to the Partnership			1,663	1,651
Equity Method Investment | Unconsolidated Joint Venture
Schedule Of Equity Method Investments [Line Items]
Rental revenue	3,636	3,643	10,895	10,773
Net income	658	496	(1,522)	2,170
Partnership's share in net income (loss)	329	248	(761)	1,085
Distributions declared to the Partnership	$ 1,184	$ 725	$ 1,663	$ 1,651

Discontinued Operations - Sched

Discontinued Operations - Schedule of Income from Discontinued Operations in Connection with Sale (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Revenue
Rental revenue from discontinued operations		$ 3,401
Expenses
Property operating		387
General and administrative		211
Transaction-related		341
Depreciation and amortization		536
Total expenses from discontinued operations		1,475
Other income and expenses
Interest and other income		105
Interest expense		(641)
Unrealized loss on derivatives		(1,799)
Gain (loss) on sale of real property interests	$ (215)	15,508
Foreign currency transaction gain	86	2,721
Total other income and expenses from discontinued operations	(129)	15,894
Income (loss) from discontinued operations before income tax expense	(129)	17,820
Income tax expense	42	480
Income (loss) from discontinued operations	$ (171)	$ 17,340

Debt - Summary of Debt (Details

Debt - Summary of Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Nov. 30, 2017
Debt Instrument [Line Items]
Outstanding Balance, revolving credit facility	$ 223,200	$ 214,200
Deferred loan costs	(2,711)	(3,567)
Secured Notes, net	275,845	279,677
Senior secured revolving credit facility
Debt Instrument [Line Items]
Outstanding Balance, revolving credit facility	$ 223,200	214,200
Maturity Date	Nov. 15, 2023
PACE Special assessment loan
Debt Instrument [Line Items]
Outstanding Balance, secured debt	$ 3,351	3,480
Maturity Date	Feb. 14, 2038
4.38% senior secured notes
Debt Instrument [Line Items]
Outstanding Balance, secured debt	$ 35,952	37,686
Maturity Date	Jun. 30, 2036
Series 2019-1 Class A 3.90%
Debt Instrument [Line Items]
Outstanding Balance, secured debt	$ 170,000	170,000
Maturity Date	Jan. 14, 2027
Series 2017-1 Class A 4.10%
Debt Instrument [Line Items]
Outstanding Balance, secured debt	$ 54,261	56,676
Maturity Date	Nov. 15, 2022
Series 2017-1 Class B 3.81%
Debt Instrument [Line Items]
Outstanding Balance, secured debt	$ 16,539	16,816
Maturity Date	Nov. 15, 2022
Secured notes
Debt Instrument [Line Items]
Outstanding Balance, secured debt	$ 280,103	284,658
Discount on Secured Notes	(549)	(831)	$ (1,800)
Deferred loan costs	(3,709)	(4,150)
Secured Notes, net	$ 275,845	$ 279,677

Debt - Summary of Debt (Parenth

Debt - Summary of Debt (Parenthetical) (Details)	9 Months Ended
	Sep. 30, 2021
4.38% senior secured notes
Debt Instrument [Line Items]
Interest rate (as a percent)	4.38%
Debt instrument, final legal maturity date	Jun. 30, 2036
Series 2019-1 Class A 3.90%
Debt Instrument [Line Items]
Interest rate (as a percent)	3.90%
Debt instrument, final legal maturity date	Jan. 14, 2027
Series 2017-1 Class A 4.10%
Debt Instrument [Line Items]
Interest rate (as a percent)	4.10%
Debt instrument, final legal maturity date	Nov. 15, 2022
Series 2017-1 Class B 3.81%
Debt Instrument [Line Items]
Interest rate (as a percent)	3.81%
Debt instrument, final legal maturity date	Nov. 15, 2022
Series 2017-1 Class A and B
Debt Instrument [Line Items]
Debt instrument, final legal maturity date	Nov. 15, 2047

Debt - Revolving Credit Facilit

Debt - Revolving Credit Facility (Details) - USD ($) $ in Thousands	Nov. 15, 2018	Sep. 30, 2021	Dec. 31, 2020
Debt
Revolving credit facility		$ 223,200	$ 214,200
Senior secured revolving credit facility
Debt
Annual commitment rate		0.20%
Maturity Date		Nov. 15, 2023
Revolving credit facility		$ 223,200	$ 214,200
Undrawn borrowing capacity		$ 226,800
Senior secured revolving credit facility | LIBOR | Minimum
Debt
Applicable margin (as a percent)		1.75%
Senior secured revolving credit facility | LIBOR | Maximum
Debt
Applicable margin (as a percent)		2.25%
Senior secured revolving credit facility | Base rate
Debt
Applicable margin (as a percent)		2.25%
Amended and Restated Senior Secured Revolving Credit Facility
Debt
Initial borrowing capacity	$ 450,000
Credit facility term	5 years
Additional borrowing capacity	$ 75,000
Standby Letters of Credit | Senior secured revolving credit facility
Debt
Undrawn borrowing capacity		$ 5,800

Debt - Secured Notes (Details)

Debt - Secured Notes (Details) - USD ($) $ in Thousands	Jan. 15, 2020	Apr. 24, 2018	Sep. 30, 2021	Dec. 31, 2020	Jun. 06, 2018	Nov. 30, 2017
Debt Instrument [Line Items]
Aggregate principal amount					$ 125,400
Restricted cash reserved			$ 3,360	$ 3,195
Maximum
Debt Instrument [Line Items]
Debt discount					$ 100
Series A Senior Secured Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 170,000
Interest rate (as a percent)	3.90%
Maturity Date	Jan. 14, 2027
Interest-only initial term	3 years
Standby letter of credit amount	$ 3,400
2016 Secured Notes
Debt Instrument [Line Items]
Repayment of debt	108,000
Senior secured revolving credit facility
Debt Instrument [Line Items]
Maturity Date			Nov. 15, 2023
Repayment of debt	$ 59,000
Note Purchase Agreement
Debt Instrument [Line Items]
Aggregate principal amount		$ 43,700
Interest rate (as a percent)		4.38%
Maturity Date		Jun. 30, 2036
Debt instrument amortized, description			The 4.38% Senior Secured Notes are fully amortized through June 30, 2036.
Note Purchase Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Net proceeds from borrowings		$ 41,000
4.38% senior secured notes
Debt Instrument [Line Items]
Interest rate (as a percent)			4.38%
Maturity Date			Jun. 30, 2036
Standby letter of credit amount		$ 2,400
Secured notes
Debt Instrument [Line Items]
Aggregate principal amount						$ 80,000
Debt discount			$ 549	$ 831		$ 1,800
Series 2017-1 Class A 4.10%
Debt Instrument [Line Items]
Interest rate (as a percent)			4.10%
Maturity Date			Nov. 15, 2022
Series 2017-1 Class B 3.81%
Debt Instrument [Line Items]
Interest rate (as a percent)			3.81%
Maturity Date			Nov. 15, 2022
2019 Secured notes | Minimum
Debt Instrument [Line Items]
DSCR			150.00%
2017 Secured notes | Minimum
Debt Instrument [Line Items]
DSCR			200.00%

Debt - Other Secured Debt (Deta

Debt - Other Secured Debt (Details) - PACE Special assessment loan - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Special Assessment bond		$ 3.5
Maturity Date	Feb. 14, 2038

Debt - Annual Principal Payment

Debt - Annual Principal Payment Amounts (Details) - Secured notes - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
2021 (three months)	$ 1,605
2022	72,527
2023	6,946
2024	7,293
2025	7,619
Thereafter	184,113
Total	$ 280,103	$ 284,658

Debt - Interest Expense (Detail

Debt - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Interest Expense
Debt interest expense	$ 5	$ 4.1	$ 14.8	$ 12.8
Interest payable	0.3		0.3		$ 0.3
Amortization of deferred loan costs and discount on secured notes	$ 0.7	$ 0.6	$ 1.9	$ 1.8

Interest Rate Swap Agreements -

Interest Rate Swap Agreements - Fair Value of Interest Rate Swap Agreements (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Level 2 inputs
Interest Rate Swap Agreements
Fair Value Asset (Liability)	$ (1,924,000)	$ (3,435,000)
Agreement entered into June 12, 2017 effective date March 02, 2018
Interest Rate Swap Agreements
Date Entered	Jun. 12, 2017
Notional value	$ 50,000,000
Fixed Rate	2.10%
Index	1-month USD LIBOR
Maturity Date	Sep. 2, 2024
Agreement entered into June 12, 2017 effective date March 02, 2018 | Level 2 inputs
Interest Rate Swap Agreements
Fair Value Asset (Liability)	$ (2,269,000)	(3,381,000)
Agreement entered into September 29, 2020 effective date September 30, 2020
Interest Rate Swap Agreements
Date Entered	Sep. 29, 2020
Notional value	$ 60,000,000
Fixed Rate	0.18%
Index	1-month USD LIBOR
Maturity Date	Nov. 15, 2023
Agreement entered into September 29, 2020 effective date September 30, 2020 | Level 2 inputs
Interest Rate Swap Agreements
Fair Value Asset (Liability)	$ 224,000	(9,000)
Agreement entered into December 30, 2020 effective date December 30, 2020
Interest Rate Swap Agreements
Date Entered	Dec. 30, 2020
Notional value	$ 40,000,000
Fixed Rate	0.21%
Index	1-month USD LIBOR
Maturity Date	Nov. 15, 2023
Agreement entered into December 30, 2020 effective date December 30, 2020 | Level 2 inputs
Interest Rate Swap Agreements
Fair Value Asset (Liability)	$ 121,000	$ (45,000)

Interest Rate Swap Agreements_2

Interest Rate Swap Agreements - Gain (Loss) on Derivatives (Details) $ in Thousands, £ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020GBP (£)
Interest Rate Swap Agreements
Unrealized gain (loss) on derivatives		$ 194	$ 154	$ 1,511	$ (6,530)
Payments to terminate derivative agreements					$ 7,565
Interest Rate Swap Agreement
Interest Rate Swap Agreements
Payments to terminate derivative agreements	$ 7,600
Interest Rate Swap Agreement | GBP
Interest Rate Swap Agreements
Payments to terminate derivative agreements	$ 3,300
Notional value | £						£ 38

Interest Rate Swap Agreements_3

Interest Rate Swap Agreements - Summary of Fair Value of Interest Rate Swaps as a Result of Analysis Performed (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Agreement entered into June 12, 2017 effective date March 02, 2018
Interest Rate Swap Agreements
Date Entered	Jun. 12, 2017
Maturity Date	Sep. 2, 2024
Agreement entered into June 12, 2017 effective date March 02, 2018 | Increase of 50 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	$ (1,607)
Agreement entered into June 12, 2017 effective date March 02, 2018 | Decrease of 50 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	(3,048)
Agreement entered into June 12, 2017 effective date March 02, 2018 | Increase of 100 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	(906)
Agreement entered into June 12, 2017 effective date March 02, 2018 | Decrease of 100 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	$ (3,788)
Agreement entered into September 29, 2020 effective date September 30, 2020
Interest Rate Swap Agreements
Date Entered	Sep. 29, 2020
Maturity Date	Nov. 15, 2023
Agreement entered into September 29, 2020 effective date September 30, 2020 | Increase of 50 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	$ 829
Agreement entered into September 29, 2020 effective date September 30, 2020 | Decrease of 50 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	(389)
Agreement entered into September 29, 2020 effective date September 30, 2020 | Increase of 100 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	1,426
Agreement entered into September 29, 2020 effective date September 30, 2020 | Decrease of 100 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	$ (1,011)
Agreement entered into December 30, 2020 effective date December 30, 2020
Interest Rate Swap Agreements
Date Entered	Dec. 30, 2020
Maturity Date	Nov. 15, 2023
Agreement entered into December 30, 2020 effective date December 30, 2020 | Increase of 50 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	$ 524
Agreement entered into December 30, 2020 effective date December 30, 2020 | Decrease of 50 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	(289)
Agreement entered into December 30, 2020 effective date December 30, 2020 | Increase of 100 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	922
Agreement entered into December 30, 2020 effective date December 30, 2020 | Decrease of 100 Basis Points
Interest Rate Swap Agreements
Fair Value of Interest Rate Swaps As a Result of Changes in Interest Rates	$ (703)
Interest Rate Swap Agreement | Increase of 50 Basis Points
Interest Rate Swap Agreements
Fair value of interest rate swaps, assumed increase (decrease) in basis points (as a percent)	0.50%
Interest Rate Swap Agreement | Decrease of 50 Basis Points
Interest Rate Swap Agreements
Fair value of interest rate swaps, assumed increase (decrease) in basis points (as a percent)	(0.50%)
Interest Rate Swap Agreement | Increase of 100 Basis Points
Interest Rate Swap Agreements
Fair value of interest rate swaps, assumed increase (decrease) in basis points (as a percent)	1.00%
Interest Rate Swap Agreement | Decrease of 100 Basis Points
Interest Rate Swap Agreements
Fair value of interest rate swaps, assumed increase (decrease) in basis points (as a percent)	(1.00%)

Equity - Changes in Units Outst

Equity - Changes in Units Outstanding (Details) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Common Units
Increase (decrease) in partners' capital
Conversion of units (in units)		7,810
Preferred Units Series C
Increase (decrease) in partners' capital
Conversion of units (in units)	0	6,000
Limited Partners | Common Units
Increase (decrease) in partners' capital
Balance (in units)	25,478,042	25,353,140
Conversion of units (in units)		7,810
Unit-based compensation (in units)	10,950	7,368
Balance (in units)	25,488,992	25,478,042
Limited Partners | Common Units | At The Market Issuance Sales Agreement
Increase (decrease) in partners' capital
Issuance of units, net (in units)		109,724
Limited Partners | Preferred Units Series A
Increase (decrease) in partners' capital
Balance (in units)	1,788,843	1,722,041
Balance (in units)	1,788,843	1,786,775
Limited Partners | Preferred Units Series A | At The Market Issuance Sales Agreement
Increase (decrease) in partners' capital
Issuance of units, net (in units)		64,734
Limited Partners | Preferred Units Series B
Increase (decrease) in partners' capital
Balance (in units)	2,628,932	2,544,793
Balance (in units)	2,628,932	2,628,932
Limited Partners | Preferred Units Series B | At The Market Issuance Sales Agreement
Increase (decrease) in partners' capital
Issuance of units, net (in units)		84,139
Limited Partners | Preferred Units Series C
Increase (decrease) in partners' capital
Balance (in units)	1,982,700	1,988,700
Conversion of units (in units)		(6,000)
Balance (in units)	1,982,700	1,982,700

Equity - General Information (D

Equity - General Information (Details) - USD ($) $ / shares in Units, $ in Thousands

Feb. 28, 2020

Jan. 30, 2020

May 03, 2019

May 15, 2018

Apr. 02, 2018

Mar. 30, 2017

Sep. 30, 2021

Jun. 30, 2021

Mar. 31, 2021

Dec. 31, 2020

Sep. 30, 2020

Mar. 31, 2020

Sep. 30, 2021

Sep. 30, 2020

Partnership Equity

Proceeds from the issuance of Preferred Units, net

$ 3,678

2020 Series B ATM Program | At The Market Issuance Sales Agreement

Partnership Equity

Aggregate offering price

$ 50,000

Issuance of units, net (in shares)

0

0

Preferred Units Series C

Partnership Equity

Distribution date

Nov. 15, 2021

Aug. 16, 2021

May 17, 2021

Feb. 16, 2021

Nov. 16, 2020

Distribution Per Unit Paid (in dollars per share)

$ 0.4375

$ 0.4375

$ 0.4375

$ 0.4375

$ 0.4375

Stated liquidation preference / redemption price (in dollars per share)

$ 25

$ 25

Conversion rate for preferred unit

1.3017

1.3017

Designated redemption date one

May 15, 2025

Designated redemption date two

May 15, 2028

Designated redemption period

5 years

Liquidation preference

$ 11.13

$ 11.13

Preferred units redemption date

May 20, 2025

Preferred units redemption price

$ 25

$ 25

Conversion of units (in units)

0

6,000

Common Units

Partnership Equity

Distribution date

Nov. 12, 2021

Aug. 13, 2021

May 14, 2021

Feb. 12, 2021

Nov. 13, 2020

Distribution Per Unit Paid (in dollars per share)

$ 0.2000

$ 0.2000

$ 0.2000

$ 0.2000

$ 0.2000

Conversion of units (in units)

7,810

Limited Partners

Partnership Equity

Aggregate offering price

$ 750,000

Limited Partners | 2019 Common Units | At The Market Issuance Sales Agreement

Partnership Equity

Aggregate offering price

$ 50,000

Issuance of units, net (in shares)

109,724

Proceeds from issuance of unit, before costs

$ 1,800

Limited Partners | 2020 Common Units | At The Market Issuance Sales Agreement

Partnership Equity

Aggregate offering price

50,000

Issuance of units, net (in shares)

0

0

Limited Partners | 2017 Series B Preferred Units ATM Program | At The Market Issuance Sales Agreement

Partnership Equity

Aggregate offering price

$ 50,000

Issuance of units, net (in shares)

84,139

Proceeds from issuance of unit, before costs

$ 2,100

Limited Partners | 2019 Series A ATM Program | At The Market Issuance Sales Agreement

Partnership Equity

Aggregate offering price

$ 50,000

Issuance of units, net (in shares)

23,287

Proceeds from issuance of unit, before costs

$ 600

Limited Partners | 2020 Series A ATM Program | At The Market Issuance Sales Agreement

Partnership Equity

Aggregate offering price

$ 50,000

Issuance of units, net (in shares)

0

41,447

Proceeds from issuance of unit, before costs

$ 1,000

Limited Partners | Preferred Units Series C

Partnership Equity

Distribution date

May 15, 2018

Distribution Per Unit Paid (in dollars per share)

$ 0.2090

Conversion of units (in units)

(6,000)

Limited Partners | Preferred Units Series C | Distributions Accruing After May 15, 2025

Partnership Equity

Dividend rate (as a percent)

9.00%

Limited Partners | Preferred Units Series C | LIBOR | Distributions Accruing Before May 15, 2025

Partnership Equity

Dividend rate (as a percent)

4.698%

Stated liquidation preference / redemption price (in dollars per share)

$ 25

$ 25

Limited Partners | Preferred Units Series C | Minimum | Distributions Accruing Before May 15, 2025

Partnership Equity

Dividend rate (as a percent)

7.00%

Limited Partners | Preferred Units Series C | Public Offering

Partnership Equity

Issuance of units, net (in shares)

2,000,000

Unit offering price (in dollars per share)

$ 25

Proceeds from the issuance of Preferred Units, net

$ 47,500

Offering expenses paid

$ 2,500

Limited Partners | Common Units

Partnership Equity

Issuance of units, net (in shares)

110,000

Conversion of units (in units)

7,810

Equity - Summary of Quarterly D

Equity - Summary of Quarterly Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020
Common Units
Quarter Ended
Declaration Date	Oct. 22, 2021	Jul. 23, 2021	Apr. 23, 2021	Jan. 22, 2021	Oct. 23, 2020
Distribution Date	Nov. 12, 2021	Aug. 13, 2021	May 14, 2021	Feb. 12, 2021	Nov. 13, 2020
Distribution Per Unit Paid (in dollars per share)	$ 0.2000	$ 0.2000	$ 0.2000	$ 0.2000	$ 0.2000
Total Distribution Paid	$ 5,098	$ 5,098	$ 5,098	$ 5,098	$ 5,096
Preferred Units Series A
Quarter Ended
Declaration Date	Sep. 20, 2021	Jun. 18, 2021	Mar. 19, 2021	Dec. 22, 2020	Sep. 18, 2020
Distribution Date	Oct. 15, 2021	Jul. 15, 2021	Apr. 15, 2021	Jan. 15, 2021	Oct. 15, 2020
Distribution Per Unit Paid (in dollars per share)	$ 0.5000	$ 0.5000	$ 0.5000	$ 0.5000	$ 0.5000
Total Distribution Paid	$ 894	$ 894	$ 894	$ 894	$ 893
Preferred Units Series B
Quarter Ended
Declaration Date	Oct. 21, 2021	Jul. 22, 2021	Apr. 22, 2021	Jan. 21, 2021	Oct. 22, 2020
Distribution Date	Nov. 15, 2021	Aug. 16, 2021	May 17, 2021	Feb. 16, 2021	Nov. 16, 2020
Distribution Per Unit Paid (in dollars per share)	$ 0.4938	$ 0.4938	$ 0.4938	$ 0.4938	$ 0.4938
Total Distribution Paid	$ 1,298	$ 1,298	$ 1,298	$ 1,298	$ 1,298
Preferred Units Series C
Quarter Ended
Declaration Date	Oct. 21, 2021	Jul. 22, 2021	Apr. 22, 2021	Jan. 21, 2021	Oct. 22, 2020
Distribution Date	Nov. 15, 2021	Aug. 16, 2021	May 17, 2021	Feb. 16, 2021	Nov. 16, 2020
Distribution Per Unit Paid (in dollars per share)	$ 0.4375	$ 0.4375	$ 0.4375	$ 0.4375	$ 0.4375
Total Distribution Paid	$ 867	$ 867	$ 867	$ 867	$ 867

Net Income (Loss) Per Limited_3

Net Income (Loss) Per Limited Partner Unit - Undistributed Net Loss Attributable to Common Unitholders (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss) attributable to partners:
Income from continuing operations	$ 2,174	$ 5,829	$ 13,571	$ 5,579
Less: Net income attributable to noncontrolling interest	8	8	24	24
Income from continuing operations attributable to limited partners	2,166	5,821	13,547	5,555
Income (loss) from discontinued operations, net of tax		(171)		17,340
Net income attributable to limited partners	2,166	5,650	13,547	22,895
Less: Distributions declared to preferred unitholders	(3,060)	(3,055)	(9,180)	(9,152)
Less: Accretion of Series C preferred units	(96)	(96)	(286)	(289)
Net income attributable to common unitholders	(990)	2,499	4,081	13,454
Undistributed income (loss) from discontinued operations		(171)		17,340
Undistributed loss from continuing operations	(6,088)	(2,426)	(11,213)	(19,174)
Preferred Units
Net income (loss) attributable to partners:
Less: Distributions declared to preferred unitholders	(3,060)	(3,055)	(9,180)	(9,152)
Common Units
Net income (loss) attributable to partners:
Less: Distributions declared to preferred unitholders	(5,098)	(5,096)	(15,294)	(15,288)
Net income attributable to common unitholders	(990)	2,499	4,081	13,454
Undistributed loss from continuing operations	(6,088)	(2,426)	(11,213)	(19,174)
Common and Subordinated Units
Net income (loss) attributable to partners:
Undistributed net loss	$ (6,088)	$ (2,597)	$ (11,213)	$ (1,834)

Net Income (Loss) Per Limited_4

Net Income (Loss) Per Limited Partner Unit - Net Income (Loss) per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss) attributable to partners:
Distributions declared	$ 3,060	$ 3,055	$ 9,180	$ 9,152
Undistributed net loss from continuing operations	(6,088)	(2,426)	(11,213)	(19,174)
Net income attributable to common unitholders	$ (990)	$ 2,499	$ 4,081	$ 13,454
Weighted average common units outstanding
Common units – basic	25,489	25,478	25,489	25,472
Common units – diluted	25,489	25,478	25,489	25,472
Income (loss) from continuing operations per common unit
Basic	$ (0.04)	$ 0.10	$ 0.16	$ (0.15)
Diluted	(0.04)	0.10	0.16	(0.15)
Net income (loss) per common unit
Basic	(0.04)	0.10	0.16	0.53
Diluted	$ (0.04)	$ 0.10	$ 0.16	$ 0.53
Common Units
Net income (loss) attributable to partners:
Distributions declared	$ 5,098	$ 5,096	$ 15,294	$ 15,288
Undistributed net loss from continuing operations	(6,088)	(2,426)	(11,213)	(19,174)
Income (loss) from continuing operations attributable to common units - basic	(990)	2,670	4,081	(3,886)
Loss from discontinued operations attributable to common units - basic		(171)		17,340
Net income attributable to common unitholders	(990)	2,499	4,081	13,454
Income (loss) from continuing operations attributable to common units - diluted	(990)	2,670	4,081	(3,886)
Loss from discontinued operations attributable to common units - diluted		(171)		17,340
Net income (loss) attributable to common units - diluted	$ (990)	$ 2,499	$ 4,081	$ 13,454
Weighted average common units outstanding
Common units – basic	25,489	25,478	25,489	25,472
Common units – diluted	25,489	25,478	25,489	25,472
Income (loss) from continuing operations per common unit
Basic	$ (0.04)	$ 0.10	$ 0.16	$ (0.15)
Diluted	(0.04)	0.10	0.16	(0.15)
Loss from discontinued operations per common unit:
Basic		(0.01)		0.68
Diluted		(0.01)		0.68
Net income (loss) per common unit
Basic	(0.04)	0.10	0.16	0.53
Diluted	$ (0.04)	$ 0.10	$ 0.16	$ 0.53

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Carrying Amount
Investment in receivables, net
Investment in receivables, net	$ 4,669	$ 5,101
Carrying Amount | Senior secured revolving credit facility
Investment in receivables, net
Revolving credit facility	223,200	214,200
Carrying Amount | Secured notes
Investment in receivables, net
Secured Notes, net	275,845	279,677
Fair Value
Investment in receivables, net
Investment in receivables, net	4,710	5,105
Fair Value | Senior secured revolving credit facility
Investment in receivables, net
Revolving credit facility	223,200	214,200
Fair Value | Secured notes
Investment in receivables, net
Secured Notes, net	$ 285,575	$ 298,097

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Assets and Liabilities Carried at Fair Value (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Assets		$ 345
Derivative Liabilities		2,269	$ 3,435
Recurring | Level 2 inputs
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Assets	[1]	345
Derivative Liabilities	[1]	$ 2,269	$ 3,435
[1]	Fair value is calculated using level 2 inputs. Level 2 inputs are quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model‑derived valuations in which significant inputs and significant value drivers are observable in active markets.

Related-Party Transactions (Det

Related-Party Transactions (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)item$ / shares$ / property	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Related Party Transaction [Line Items]
Percentage of revenue (as a percent)			3.00%
Expiration of quarterly cap, measurement period, number of consecutive fiscal quarters (in periods) | item			4
Expiration of quarterly cap, measurement period, minimum revenue			$ 120,000,000
Cap expiration date			Nov. 19, 2021
Reimbursement of expenses that exceeded the cap	$ 1,000,000	$ 300,000	$ 2,300,000	$ 2,200,000
Management fees related to unconsolidated joint venture not subject to cap	100,000	100,000	200,000	200,000
Fee for second year of agreement (in dollars per year)			$ 50,000
Maximum fee each year starting in third year of agreement, as a percentage of our gross revenue			0.10%
Minimum fee each year starting in third year of agreement (in dollars per year)			$ 100,000
License fees related to agreement		$ 25,000	$ 41,667	$ 75,000
Type of Cost, Good or Service [Extensible List]		us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember
Due from Landmark and affiliates	$ 1,843,000		$ 1,843,000		$ 1,337,000
4.38% senior secured notes
Related Party Transaction [Line Items]
Interest rate (as a percent)	4.38%		4.38%
Incentive Distribution Rights
Related Party Transaction [Line Items]
Incentive distribution and allocations waived amount	$ 0	$ 0	$ 0	$ 0
Threshold percentage per unit per quarter (in dollars per share) | $ / shares			$ 0.2875
General Partner
Related Party Transaction [Line Items]
Management fee (as a percent)			2.00%
General Partner | 4.38% senior secured notes
Related Party Transaction [Line Items]
Management fee (as a percent)			0.50%
Interest rate (as a percent)	4.38%		4.38%
General Partner | Secured Notes Management Agreement
Related Party Transaction [Line Items]
Management fee (as a percent)			1.50%	1.50%
General Partner | Secured Notes Management Agreement | 2018 Secured Notes | Unconsolidated Joint Venture
Related Party Transaction [Line Items]
Management fee (as a percent)			1.50%
General Partner | Management fees
Related Party Transaction [Line Items]
Costs incurred			$ 100,000	$ 100,000
General Partner | Management fees | 2018 Secured Notes | Unconsolidated Joint Venture
Related Party Transaction [Line Items]
Costs incurred	$ 100,000	100,000	200,000	200,000
Landmark Dividend LLC | Acquisitions fees
Related Party Transaction [Line Items]
Costs incurred	0	3,800,000	0	$ 3,800,000
Landmark, General Partner and affiliates
Related Party Transaction [Line Items]
Due from Landmark and affiliates	1,800,000		$ 1,800,000		$ 1,300,000
Maximum | 2018 Secured Notes | Unconsolidated Joint Venture
Related Party Transaction [Line Items]
Operating revenue per tenant site | $ / property			46
Maximum | Incentive Distribution Rights
Related Party Transaction [Line Items]
Percentage of available cash			50.00%
Maximum | General Partner | Management fees
Related Party Transaction [Line Items]
Costs incurred	$ 100,000	$ 100,000

Segment Information - General I

Segment Information - General Information (Details)	9 Months Ended
	Sep. 30, 2021segment
Segment Reporting [Abstract]
Number of reportable segments	4

Segment Information - Statement

Segment Information - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Rental revenue	$ 17,405	$ 14,228	$ 52,259	$ 41,893
Expenses
Property operating	1,188	360	2,966	1,223
General and administrative	1,483	768	3,915	3,479
Transaction-related	3,295		3,421	91
Depreciation and amortization	5,079	3,808	14,871	11,711
Impairments	8	16	35	200
Total expenses	11,053	4,952	25,208	16,704
Total other income and expenses	(4,258)	(3,620)	(13,560)	(20,118)
Income from continuing operations before income tax benefit	2,094	5,656	13,491	5,071
Income tax benefit	(80)	(173)	(80)	(508)
Income from continuing operations	2,174	5,829	13,571	5,579
Income (loss) from discontinued operations, net of tax		(171)		17,340
Net income	2,174	5,658	13,571	22,919
Operating Segments | Wireless Communication
Revenue
Rental revenue	6,630	6,465	19,809	19,136
Expenses
Property operating	93	28	200	231
Depreciation and amortization	1,821	1,682	5,428	5,967
Impairments	8		8	78
Total expenses	1,922	1,710	5,636	6,276
Total other income and expenses	412	273	(491)	1,341
Income from continuing operations before income tax benefit	5,120	5,028	13,682	14,201
Income from continuing operations		5,028		14,201
Net income	5,120	5,028	13,682	14,201
Operating Segments | Digital Infrastructure
Revenue
Rental revenue	4,904	2,095	14,654	5,209
Expenses
Property operating	287	71	889	263
Depreciation and amortization	1,350	743	4,058	1,866
Total expenses	1,637	814	4,947	2,129
Total other income and expenses	(52)	(3)	(164)	(3)
Income from continuing operations before income tax benefit	3,215	1,278	9,543	3,077
Income from continuing operations		1,278		3,077
Net income	3,215	1,278	9,543	3,077
Operating Segments | Outdoor Advertising
Revenue
Rental revenue	3,820	3,679	11,467	11,486
Expenses
Property operating	781	191	1,764	610
Depreciation and amortization	1,785	1,263	5,016	3,518
Impairments		16	27	122
Total expenses	2,566	1,470	6,807	4,250
Total other income and expenses	79	(3)	189	(3)
Income from continuing operations before income tax benefit	1,333	2,206	4,849	7,233
Income from continuing operations		2,206		7,233
Income (loss) from discontinued operations, net of tax		(171)		17,340
Net income	1,333	2,035	4,849	24,573
Operating Segments | Renewable Power Generation
Revenue
Rental revenue	2,051	1,989	6,329	6,062
Expenses
Property operating	27	70	113	119
Depreciation and amortization	123	120	369	360
Total expenses	150	190	482	479
Total other income and expenses	19	20	58	57
Income from continuing operations before income tax benefit	1,920	1,819	5,905	5,640
Income from continuing operations		1,819		5,640
Net income	1,920	1,819	5,905	5,640
Corporate
Expenses
General and administrative	1,483	768	3,915	3,479
Transaction-related	3,295		3,421	91
Total expenses	4,778	768	7,336	3,570
Total other income and expenses	(4,716)	(3,907)	(13,152)	(21,510)
Income from continuing operations before income tax benefit	(9,494)	(4,675)	(20,488)	(25,080)
Income tax benefit	(80)	(173)	(80)	(508)
Income from continuing operations		(4,502)		(24,572)
Net income	$ (9,414)	$ (4,502)	$ (20,408)	$ (24,572)

Segment Information - Total Ass

Segment Information - Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 891,153	$ 894,778
Corporate
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	19,433	18,601
Wireless Communication | Operating Segments
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	348,603	354,457
Digital Infrastructure | Operating Segments
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	214,081	216,849
Outdoor Advertising | Operating Segments
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	209,277	204,990
Renewable Power Generation | Operating Segments
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 99,759	$ 99,881

Segment Information - Schedule

Segment Information - Schedule of Rental Revenues by Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Asset Reconciling Item [Line Items]
Rental revenue	$ 17,405	$ 14,228	$ 52,259	$ 41,893
United States
Segment Reporting Asset Reconciling Item [Line Items]
Rental revenue	16,430	13,861	49,478	40,913
Australia
Segment Reporting Asset Reconciling Item [Line Items]
Rental revenue	425	312	1,110	888
Canada
Segment Reporting Asset Reconciling Item [Line Items]
Rental revenue	$ 550	$ 55	$ 1,671	$ 92

Segment Information - Schedul_2

Segment Information - Schedule of Total Assets by Geographic Location (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 891,153	$ 894,778
United States
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	846,115	852,088
Australia
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	17,638	17,533
Canada
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 27,400	$ 25,157

Commitments and Contingencies -

Commitments and Contingencies - Real Property Interest Subject to Subordination (Details) $ in Millions	Sep. 30, 2021USD ($)site
Commitments And Contingencies Disclosure [Abstract]
Number of tenant sites received termination notice and has been vacated | site	7
Real property interest subject to subordination | $	$ 62

Tenant Concentration - Schedule

Tenant Concentration - Schedule of Tenant Revenue Concentrations (Details) - Concentration - Tenant Revenue	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
T-Mobile
Concentration Risk [Line Items]
Percentage of revenue	10.40%	14.60%	10.50%	14.70%
Sungard
Concentration Risk [Line Items]
Percentage of revenue	10.60%	6.00%	10.90%	4.80%
Clear Channel
Concentration Risk [Line Items]
Percentage of revenue	8.80%	10.80%	8.80%	11.20%

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Schedule of Noncash Activities (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Noncash activities
Capital contribution to fund general and administrative expense reimbursement				$ 1,050	$ 425
Distributions payable to preferred unitholders				1,836	1,835
Accretion of Series C preferred units	$ 96	$ 96		286	289
Conversion of Preferred Units			$ 150
Purchase price for acquisitions and development activities included in accounts payable and accrued liabilities				659	336
Assumption of PACE Special Assessment loan					3,354
Initial recognition of lease liabilities related to right of use assets				77
Net cash provided by operating activities of discontinued operations					3,293
Net cash provided by investing activities of discontinued operations					115,868
Net cash used in financing activities of discontinued operations					(54,185)
Preferred Units Series C
Noncash activities
Accretion of Series C preferred units	$ 96	$ 96		$ 286	289
Conversion of Preferred Units					150
ASU 2016-13
Noncash activities
Adoption of ASU 2016-13					$ (76)

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Schedule of Cash Flows Related to Interest and Income Taxes Paid (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows related to interest paid
Cash paid for interest	$ 12,945	$ 11,813
Capitalized interest	1,043	1,601
Income taxes paid	$ 241	$ 543

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($) $ in Thousands	Oct. 13, 2021	Jun. 30, 2020	Sep. 30, 2020	Jun. 06, 2018
Subsequent Event [Line Items]
Aggregate principal amount				$ 125,400
Payments to terminate derivative agreements			$ 7,565
Subsequent Event | 2021-1 Secured Notes
Subsequent Event [Line Items]
Aggregate principal amount	$ 172,500
Maturity Date	Sep. 15, 2028
Subsequent Event | Secured Notes Revolving Credit Facility
Subsequent Event [Line Items]
Repayment of debt	$ 168,200
Interest Rate Swap Agreement
Subsequent Event [Line Items]
Payments to terminate derivative agreements		$ 7,600
Interest Rate Swap Agreement | Subsequent Event
Subsequent Event [Line Items]
Notional value	50,000
Payments to terminate derivative agreements	$ 2,000