MGM Growth Properties 10-K 1 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Feb. 23, 2018	Jun. 30, 2017
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	MGP
Entity Registrant Name	MGM Growth Properties LLC
Entity Central Index Key	1,656,936
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1.7
Entity Common Stock, Shares Outstanding		70,896,795
MGP Operating Partnership
Document Information [Line Items]
Entity Registrant Name	MGM Growth Properties Operating Partnership LP
Entity Central Index Key	1,691,299
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Real estate investments, net	$ 10,021,938	$ 9,079,678
Cash and cash equivalents	259,722	360,492
Tenant and other receivables, net	6,385	9,503
Prepaid expenses and other assets	18,487	10,906
Above market lease, asset	44,588	46,161
Total assets	10,351,120	9,506,740
Liabilities
Debt, net	3,934,628	3,621,942
Due to MGM Resorts International and affiliates	962	166
Accounts payable, accrued expenses and other liabilities	10,240	10,478
Above market lease, liability	47,069	47,957
Accrued interest	22,565	26,137
Dividend payable	111,733	94,109
Deferred revenue	127,640	72,322
Deferred income taxes, net	28,544	25,368
Total liabilities	4,283,381	3,898,479
Commitments and contingencies (Note 13)
Shareholders' equity
Class A shares: no par value, 1,000,000,000 shares authorized, 70,896,795 and 57,500,000 shares issued and outstanding as of December 31, 2017 and December 31, 2016, respectively	0	0
Additional paid-in capital	1,716,490	1,363,130
Accumulated deficit	(94,948)	(29,758)
Accumulated other comprehensive income	3,108	445
Total Class A shareholders' equity	1,624,650	1,333,817
Partners’ capital
General partner	0	0
Limited partners: 266,030,918 and 242,862,136 Operating Partnership units issued and outstanding as of December 31, 2017 and December 31, 2016, respectively.	6,067,739	5,608,261
Total partners’ capital	6,067,739	5,608,261
Noncontrolling interest	4,443,089	4,274,444
Total shareholders' equity	6,067,739	5,608,261
Total liabilities and shareholders' equity	10,351,120	9,506,740
MGP Operating Partnership
ASSETS
Real estate investments, net	10,021,938	9,079,678
Cash and cash equivalents	259,722	360,492
Tenant and other receivables, net	6,385	9,503
Prepaid expenses and other assets	18,487	10,906
Above market lease, asset	44,588	46,161
Total assets	10,351,120	9,506,740
Liabilities
Debt, net	3,934,628	3,621,942
Due to MGM Resorts International and affiliates	962	166
Accounts payable, accrued expenses and other liabilities	10,240	10,478
Above market lease, liability	47,069	47,957
Accrued interest	22,565	26,137
Dividend payable	111,733	94,109
Deferred revenue	127,640	72,322
Deferred income taxes, net	28,544	25,368
Total liabilities	4,283,381	3,898,479
Commitments and contingencies (Note 13)
Partners’ capital
General partner	0	0
Limited partners: 266,030,918 and 242,862,136 Operating Partnership units issued and outstanding as of December 31, 2017 and December 31, 2016, respectively.	6,067,739	5,608,261
Total partners’ capital	6,067,739	5,608,261
Total liabilities and shareholders' equity	$ 10,351,120	$ 9,506,740

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Class A Shares
Shareholders' equity
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	70,896,795	57,500,000
Common stock, shares outstanding (in shares)	70,896,795	57,500,000
MGP Operating Partnership
Partners’ capital
Operating Partnership, units issued (in units)	266,030,918	242,862,136
Operating Partnership, units outstanding (in units)	266,030,918	242,862,136

Combined and Consolidated State

Combined and Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Rental revenue	$ 675,089	$ 419,239	$ 0
Tenant reimbursements and other	90,606	48,309	0
Revenues, net	765,695	467,548	0
Expenses
Depreciation	260,455	220,667	196,816
Property transactions, net	34,022	4,684	6,665
Reimbursable expenses	88,254	68,063	58,473
Amortization of above market lease, net	686	286	0
Acquisition-related expenses	17,304	10,178	0
General and administrative	12,189	9,896	0
Expenses, net	412,910	313,774	261,954
Operating income (loss)	352,785	153,774	(261,954)
Interest income	3,907	774	0
Interest expense	(184,175)	(116,212)	0
Other non-operating	(1,621)	(726)	0
Non-operating income (expense)	(181,889)	(116,164)	0
Income (loss) before income taxes	170,896	37,610	(261,954)
Provision for income taxes	(4,906)	(2,264)	0
Net income (loss)	165,990	35,346	(261,954)
Less: Net (income) attributable to noncontrolling interest	(124,215)	(5,408)	261,954
Net income attributable to Class A shareholders	$ 41,775	$ 29,938	0
Weighted average Class A shares outstanding:
Basic (in shares)	61,733,136	57,502,158
Diluted (in shares)	61,916,546	57,751,489
Per Class A share data
Net income per Class A share (basic) (in dollars per share)	$ 0.68	$ 0.52
Net income per Class A share (diluted) (in dollars per share)	$ 0.67	$ 0.52
MGP Operating Partnership
Revenues
Rental revenue	$ 675,089	$ 419,239	0
Tenant reimbursements and other	90,606	48,309	0
Revenues, net	765,695	467,548	0
Expenses
Depreciation	260,455	220,667	196,816
Property transactions, net	34,022	4,684	6,665
Reimbursable expenses	88,254	68,063	58,473
Amortization of above market lease, net	686	286	0
Acquisition-related expenses	17,304	10,178	0
General and administrative	12,189	9,896	0
Expenses, net	412,910	313,774	261,954
Operating income (loss)	352,785	153,774	(261,954)
Interest income	3,907	774	0
Interest expense	(184,175)	(116,212)	0
Other non-operating	(1,621)	(726)	0
Non-operating income (expense)	(181,889)	(116,164)	0
Income (loss) before income taxes	170,896	37,610	(261,954)
Provision for income taxes	(4,906)	(2,264)	0
Net income (loss)	$ 165,990	$ 35,346	$ (261,954)
Weighted average Operating Partnership units outstanding:
Basic (in units)	249,451,258	232,181,070
Diluted (in units)	249,634,668	232,430,401
Per Operating Partnership unit data
Net income per Operating Partnership unit (basic) (in dollars per unit)	$ 0.67	$ 0.52
Net income per Operating Partnership unit (diluted) (in dollars per unit)	$ 0.66	$ 0.52

Combined and Consolidated Stat5

Combined and Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income (loss)	$ 165,990	$ 35,346	$ (261,954)
Other comprehensive income
Unrealized gain on cash flow hedges	9,782	1,879	0
Other comprehensive income	9,782	1,879	0
Comprehensive income (loss)	175,772	37,225	(261,954)
Less: Comprehensive income attributable to noncontrolling interests	(131,236)	(6,842)	0
Comprehensive income (loss) attributable to Class A shareholders	44,536	30,383	(261,954)
MGP Operating Partnership
Net income (loss)	165,990	35,346	(261,954)
Other comprehensive income
Unrealized gain on cash flow hedges	9,782	1,879	0
Other comprehensive income	9,782	1,879
Comprehensive income (loss)	$ 175,772	$ 37,225	$ (261,954)

Combined and Consolidated Stat6

Combined and Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income (loss)	$ 165,990	$ 35,346	$ (261,954)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	260,455	220,667	196,816
Property transactions, net	34,022	4,684	6,665
Amortization and write-off of deferred financing costs and debt discount	12,158	7,195	0
Amortization related to above market lease, net	686	286	0
Provision for income taxes	4,906	2,264	0
Straight-line rental revenues	6,414	(1,739)	0
Amortization of deferred revenue	(2,352)	(80)	0
Share-based compensation	1,336	510	0
Change in operating assets and liabilities:
Tenant and other receivables, net	3,118	(9,503)	0
Prepaid expenses and other assets	(1,537)	6,747	0
Due to MGM Resorts International and affiliates	796	166	0
Accounts payable, accrued expenses and other liabilities	158	5,101	0
Accrued interest	(3,572)	26,137	0
Net cash provided by (used in) operating activities	482,578	297,781	(58,473)
Cash flows from investing activities
Capital expenditures for property and equipment	(488)	(138,987)	(129,308)
MGM National Harbor Transaction	(462,500)	0	0
Net cash used in investing activities	(462,988)	(138,987)	(129,308)
Cash flows from financing activities
Proceeds from issuance of debt	350,000	3,700,000	0
Deferred financing costs	(5,598)	(77,163)	0
Repayment of assumed debt and bridge facilities	(425,000)	(4,544,850)	0
Repayment of debt principal	(41,875)	(16,750)	0
Proceeds from issuance of Operating Partnership units by MGP	387,548	1,132,468
Issuance of Class A shares	404,685	1,207,500	0
Class A share issuance costs	(17,137)	(75,032)	0
Dividends and distributions paid	(385,435)	(150,829)	0
Net cash transfers from Parent	0	158,822	187,781
Net cash provided by (used in) financing activities	(120,360)	201,698	187,781
Cash and cash equivalents
Net increase (decrease) for the period	(100,770)	360,492	0
Balance, beginning of period	360,492	0	0
Balance, end of period	259,722	360,492	0
Supplemental cash flow disclosures
Interest paid	176,033	82,880	0
Non-cash investing and financing activities
Non-Normal Tenant Improvements by Tenant	52,995	72,402	0
Accrual of dividend and distribution payable to Class A shareholders and Operating Partnership unit holders	111,733	94,109	0
MGM National Harbor Transaction
Non-cash investing and financing activities
Net assets acquired	721,409	0	0
Borgata Transaction
Non-cash investing and financing activities
Net assets acquired	0	1,273,230	0
MGP Operating Partnership
Cash flows from operating activities
Net income (loss)	165,990	35,346	(261,954)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	260,455	220,667	196,816
Property transactions, net	34,022	4,684	6,665
Amortization and write-off of deferred financing costs and debt discount	12,158	7,195	0
Amortization related to above market lease, net	686	286	0
Provision for income taxes	4,906	2,264	0
Straight-line rental revenues	6,414	(1,739)	0
Amortization of deferred revenue	(2,352)	(80)	0
Share-based compensation	1,336	510	0
Change in operating assets and liabilities:
Tenant and other receivables, net	3,118	(9,503)	0
Prepaid expenses and other assets	(1,537)	6,747	0
Due to MGM Resorts International and affiliates	796	166	0
Accounts payable, accrued expenses and other liabilities	158	5,101	0
Accrued interest	(3,572)	26,137	0
Net cash provided by (used in) operating activities	482,578	297,781	(58,473)
Cash flows from investing activities
Capital expenditures for property and equipment	(488)	(138,987)	(129,308)
MGM National Harbor Transaction	(462,500)	0	0
Net cash used in investing activities	(462,988)	(138,987)	(129,308)
Cash flows from financing activities
Proceeds from issuance of debt	350,000	3,700,000	0
Deferred financing costs	(5,598)	(77,163)	0
Repayment of assumed debt and bridge facilities	(425,000)	(4,544,850)	0
Repayment of debt principal	(41,875)	(16,750)	0
Proceeds from issuance of Operating Partnership units by MGP	387,548	1,132,468	0
Dividends and distributions paid	(385,435)	(150,829)	0
Net cash transfers from Parent	0	158,822	187,781
Net cash provided by (used in) financing activities	(120,360)	201,698	187,781
Cash and cash equivalents
Net increase (decrease) for the period	(100,770)	360,492	0
Balance, beginning of period	360,492	0	0
Balance, end of period	259,722	360,492	0
Supplemental cash flow disclosures
Interest paid	176,033	82,880	0
Non-cash investing and financing activities
Non-Normal Tenant Improvements by Tenant	52,995	72,402	0
Accrual of dividend and distribution payable to Class A shareholders and Operating Partnership unit holders	111,733	94,109	0
MGP Operating Partnership | MGM National Harbor Transaction
Non-cash investing and financing activities
Net assets acquired	721,409	0	0
MGP Operating Partnership | Borgata Transaction
Non-cash investing and financing activities
Net assets acquired	$ 0	$ 1,273,230	$ 0

Combined and Consolidated Stat7

Combined and Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Class A Shares	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Predecessor Net Parent Investment	Parent	Noncontrolling Interest
Balance at Dec. 31, 2014	$ 6,127,347	$ 0	$ 0	$ 0	$ 0	$ 6,127,347	$ 6,127,347	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(261,954)					(261,954)	(261,954)
Net transfers from Parent	193,566					193,566	193,566
Other comprehensive income - cash flow hedges	0
Balance at Dec. 31, 2015	6,058,959	0	0	0	0	6,058,959	6,058,959	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(84,383)					(84,383)	(84,383)
Balance at Dec. 31, 2015	6,058,959	0	0	0	0	6,058,959	6,058,959	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	35,346
Assumption of bridge facilities from MGM	(4,000,000)					(4,000,000)	(4,000,000)
Other contributions from MGM	1,893,502					1,893,502	1,893,502
Issuance of Class A shares	1,207,500		1,207,500				1,207,500
Initial public offering costs	(75,032)		(75,032)				(75,032)
Acquisition Transaction	728,379		28,753				28,753	699,626
Other comprehensive income - cash flow hedges	1,879				445		445	1,434
Share-based compensation	510		124				124	386
Deemed contribution - tax sharing agreement	2,156							2,156
Dividends and distributions declared and paid	(244,938)			(59,696)			(59,696)	(185,242)
Balance at Dec. 31, 2016	5,608,261	0	1,363,130	(29,758)	445	0	1,333,817	4,274,444
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest and additional paid-in capital	0		201,785			(3,868,078)	(3,666,293)	3,666,293
Net income (loss)	119,729			29,938			29,938	89,791
Balance at Dec. 31, 2016	5,608,261	0	1,363,130	(29,758)	445	0	1,333,817	4,274,444
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest and additional paid-in capital	4,274,444
Net income (loss)	165,990			41,775			41,775	124,215
Issuance of Class A shares	387,548		333,742	(4,125)	(109)		329,508	58,040
Acquisition Transaction	296,409		19,372		11		19,383	277,026
Other comprehensive income - cash flow hedges	9,782				2,761		2,761	7,021
Share-based compensation	1,336		334				334	1,002
Deemed contribution - tax sharing agreement	1,730							1,730
Dividends and distributions declared and paid	(403,059)			(102,840)			(102,840)	(300,219)
Other	(258)		(88)				(88)	(170)
Balance at Dec. 31, 2017	6,067,739	$ 0	$ 1,716,490	$ (94,948)	$ 3,108	$ 0	$ 1,624,650	$ 4,443,089
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest and additional paid-in capital	$ 4,443,089

Combined and Consolidated Stat8

Combined and Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Total	MGP Operating Partnership	MGP Operating PartnershipPredecessor Net Parent Investment	MGP Operating PartnershipGeneral Partner	MGP Operating PartnershipLimited Partners
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partnership interest effective at IPO date	$ 6,127,347
Beginning balance at Dec. 31, 2014		$ 6,127,347	$ 6,127,347	$ 0	$ 0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(261,954)	(261,954)	(261,954)
Net transfers from Parent	193,566	193,566	193,566
Other comprehensive income - cash flow hedges	0
Ending balance at Dec. 31, 2015		6,058,959	6,058,959	0	0
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partnership interest effective at IPO date	6,058,959
Net income (loss)	(84,383)	(84,383)	(84,383)
Assumption of bridge facilities from MGM		(4,000,000)	(4,000,000)
Other contributions from MGM		1,893,502	1,893,502
Beginning balance at Dec. 31, 2015		6,058,959	6,058,959	0	0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	35,346	35,346
Assumption of bridge facilities from MGM	(4,000,000)
Other contributions from MGM	1,893,502
Purchase of Operating Partnership units by MGM		1,132,468			1,132,468
Acquisition Transaction		728,379			728,379
Other comprehensive income - cash flow hedges	1,879	1,879			1,879
Share-based compensation		510			510
Deemed contribution - tax sharing agreement	2,156	2,156			2,156
Distributions declared and paid		(244,938)			(244,938)
Ending balance at Dec. 31, 2016	5,608,261	5,608,261	0	0	5,608,261
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partnership interest effective at IPO date		0	(3,868,078)		3,868,078
Net income (loss)	119,729	119,729			119,729
Ending balance at Dec. 31, 2016	5,608,261	5,608,261	0	0	5,608,261
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partnership interest effective at IPO date	5,608,261
Net income (loss)	165,990	165,990			165,990
Assumption of bridge facilities from MGM		(4,000,000)
Purchase of Operating Partnership units by MGM		387,548			387,548
Acquisition Transaction		296,409			296,409
Other comprehensive income - cash flow hedges	9,782	9,782			9,782
Share-based compensation		1,336			1,336
Deemed contribution - tax sharing agreement	1,730	1,730			1,730
Distributions declared and paid		(403,059)			(403,059)
Other		(258)			(258)
Ending balance at Dec. 31, 2017	6,067,739	$ 6,067,739	$ 0	$ 0	$ 6,067,739
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partnership interest effective at IPO date	$ 6,067,739

Business

Business	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BUSINESS	BUSINESS Organization. MGM Growth Properties LLC (“MGP” or the “Company”) is a limited liability company that was organized in Delaware on October 23, 2015. MGP conducts its operations through MGM Growth Properties Operating Partnership LP (the “Operating Partnership”), a Delaware limited partnership that was formed on January 6, 2016 and acquired by MGP on April 25, 2016 (the “IPO Date”) in connection with MGP's formation transactions, including its initial public offering of Class A shares as discussed further below. The Company has elected be treated as a real estate investment trust ("REIT") commencing with its taxable year ended December 31, 2016. MGM Resorts International (“MGM” or the “Parent”) is a Delaware corporation that acts largely as a holding company and, through its subsidiaries, owns and operates large-scale destination entertainment and leisure resorts. Prior to the IPO Date, the real estate assets of The Mirage, Mandalay Bay, Luxor, New York-New York, Monte Carlo, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit and Beau Rivage (collectively, the “IPO Properties”), which comprised the Company’s real estate investments prior to the acquisition of Borgata (as described below), were owned and operated by MGM. On the IPO Date, MGM engaged in a series of transactions (the “Formation Transactions”) in which subsidiaries of MGM transferred the IPO Properties to newly formed subsidiaries and subsequently transferred 100% ownership interest in such subsidiaries to the Operating Partnership pursuant to a Master Contribution Agreement (the “MCA”) in exchange for Operating Partnership units representing limited partner interests in the Operating Partnership and the assumption by the Operating Partnership of $4 billion of indebtedness from the contributing MGM subsidiaries. On the IPO Date, MGP completed the initial public offering of 57,500,000 of its Class A shares representing limited liability company interests at an initial offering price of $21.00 per share, inclusive of the full exercise by the underwriters of their option to purchase 7,500,000 Class A shares. MGP contributed the proceeds from its initial public offering to the Operating Partnership in exchange for 26.7% of the Operating Partnership units and the general partner interest in the Operating Partnership. Certain subsidiaries of MGM acquired the remaining 73.3% of the outstanding Operating Partnership units on such date. MGM retained ownership of MGP’s outstanding Class B share. The Class B share is a non-economic interest in MGP which does not provide its holder any rights to profits or losses or any rights to receive distributions from the operations of MGP or upon liquidation or winding up of MGP but which represents a majority of the voting power of MGP’s shares. As a result, MGP continues to be controlled by MGM through its majority voting rights, and is consolidated by MGM. As discussed in Note 3 and Note 9, the Operating Partnership issued additional Operating Partnership units in connection with the Borgata Transaction, the public offering of Class A shares and the MGM National Harbor Transaction. As of December 31, 2017 , there were 266,030,918 Operating Partnership units outstanding in the Operating Partnership of which MGM owned 195,134,123 Operating Partnership units or 73.4% of the Operating Partnership units in the Operating Partnership. MGP owns the remaining 26.6% of the Operating Partnership units in the Operating Partnership. MGM’s Operating Partnership units are exchangeable into Class A shares of MGP on a one -to-one basis, or cash at the fair value of a Class A share. The determination of settlement method is at the option of MGP’s independent conflicts committee. MGM’s indirect ownership of these Operating Partnership units is recognized as a noncontrolling interest in MGP’s financial statements. A wholly owned subsidiary of MGP is the general partner of the Operating Partnership and operates and controls all of its business affairs. As a result, MGP consolidates the Operating Partnership and its subsidiaries. MGP is a publicly traded REIT primarily engaged through its investment in the Operating Partnership in the real property business, which consists of owning, acquiring and leasing large-scale destination entertainment and leisure resorts, whose tenants generally offer casino gaming, hotel, convention, dining, entertainment and retail. A wholly owned subsidiary of the Operating Partnership (the “Landlord”) leases all of its real estate properties back to a wholly owned subsidiary of MGM (the “Tenant”) under a master lease agreement (the “Master Lease”).

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of presentation. The accompanying combined and consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) set forth in the Accounting Standards Codification (“ASC”), as published by the Financial Accounting Standards Board (“FASB”), and with the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). For periods prior to the IPO Date, the accompanying combined and consolidated financial statements of MGP and the Operating Partnership represent the IPO Properties, which were controlled by MGM, and have been determined to be MGP’s and the Operating Partnership’s predecessor for accounting purposes (the “Predecessor”). The accompanying combined and consolidated financial statements include Predecessor financial statements that have been “carved out” of MGM’s consolidated financial statements and reflect significant assumptions and allocations. The financial statements do not fully reflect what the Predecessor’s results of operations, financial position and cash flows would have been if the Predecessor had been a stand-alone company during the periods presented. As a result, historical financial information is not necessarily indicative of the future results of operations, financial position and cash flows of MGP or the Operating Partnership. For periods subsequent to the IPO Date, the accompanying combined and consolidated financial statements of MGP and the Operating Partnership represent the results of operations, financial positions and cash flows of MGP and the Operating Partnership, including their respective subsidiaries. Certain reclassifications have been made to conform the prior period presentation. Property tax expense and property insurance expense were separately classified in prior periods and now are classified within “reimbursable expenses” in the accompanying combined and consolidated statements of operations. Principles of consolidation. The Company identifies entities for which control is achieved through means other than voting rights and to determine which business enterprise is the primary beneficiary of variable interest entities (“VIE”). A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affect the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. The combined and consolidated financial statements of MGP include the accounts of the Operating Partnership, a VIE of which the Company is the primary beneficiary, as well as its wholly owned and majority-owned subsidiaries. MGP’s maximum exposure to loss is the carrying value of the assets and liabilities of the Operating Partnership, which represents all of MGP’s assets and liabilities. As MGP holds what is deemed a majority voting interest in the Operating Partnership through its ownership of the Operating Partnership’s sole general partner, it qualifies for the exemption from providing certain of the required disclosures associated with investments in VIEs. The combined and consolidated financial statements of the Operating Partnership include the accounts of its wholly owned subsidiary, the Landlord, which owns the real estate, a VIE of which the Operating Partnership is the primary beneficiary. The Operating Partnership’s maximum exposure to loss is the carrying value of the assets and liabilities of the Landlord, which represent $10.1 billion of the Operating Partnership’s assets and $209.3 million of the Operating Partnership’s liabilities at December 31, 2017. For entities not determined to be VIEs, the Company consolidates such entities in which the Company owns 100% of the equity. For entities in which the Company owns less than 100% of the equity interest, the Company consolidates the entity if it has the direct or indirect ability to control the entities’ activities based upon the terms of the respective entities’ ownership agreements. All intercompany balances and transactions are eliminated in consolidation. Noncontrolling interest. MGP presents noncontrolling interest and classifies such interest as a component of consolidated shareholders’ equity, separate from the Company’s Class A shareholders’ equity. Noncontrolling interest in MGP represents Operating Partnership units currently held by subsidiaries of MGM. Net income or loss of the Operating Partnership is allocated to its noncontrolling interest based on the noncontrolling interest’s ownership percentage in the Operating Partnership except for income tax expenses as discussed in Note 8. Ownership percentage is calculated by dividing the number of Operating Partnership units held by the noncontrolling interest by the total Operating Partnership units held by the noncontrolling interest and the Company. Issuance of additional Class A shares and Operating Partnership units changes the ownership interests of both the noncontrolling interest and the Company. Such transactions and the related proceeds are treated as capital transactions. MGM may tender its Operating Partnership units for redemption by the Operating Partnership in exchange for cash equal to the market price of MGP’s Class A shares at the time of redemption or for unregistered Class A shares on a one -for-one basis. Such selection to pay cash or issue Class A shares to satisfy an Operating Partnership unitholder’s redemption request is solely within the control of MGP’s independent conflicts committee. Use of estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company’s most significant assumptions and estimates relate to the useful lives of real estate assets, real estate impairment assessments, and valuation of derivative financial instruments. These estimates are based on historical experience and other assumptions which management believes are reasonable under the circumstances. Management evaluates its estimates on an ongoing basis and makes revisions to these estimates and related disclosures as experience develops or new information becomes known. Actual results could differ from these estimates. Real estate investments. Real estate investments consist of land, buildings, improvements and integral equipment. Because the Formation Transactions, the Borgata Transaction, and the MGM National Harbor Transaction (as defined in Note 3) represent transactions between entities under common control, such real estate was initially recorded by the Company at MGM’s historical cost basis, less accumulated depreciation (i.e., there was no change in the basis of the contributed assets), as of the IPO Date and the date of the consummation of the Borgata Transaction and the MGM National Harbor Transaction, respectively. Costs of maintenance and repairs to real estate investments are the responsibility of the Tenant under the Master Lease. Although the Tenant is responsible for all capital expenditures during the term of the Master Lease, if, in the future, MGM ceases to consolidate MGP, the Company may be required to pay the Tenant, should the Tenant so elect, for certain capital improvements that would not constitute “normal tenant improvements” in accordance with U.S. GAAP (“Non-Normal Tenant Improvements”), subject to an initial cap of $100 million in the first year of the Master Lease increasing annually by $75 million each year thereafter. The Company will be entitled to receive additional rent based on the 10 -year Treasury yield plus 600 basis points multiplied by the value of the new capital improvements the Company is required to pay for in connection with a deconsolidation event and such capital improvements will be subject to the terms of the Master Lease. Examples of Non-Normal Tenant Improvements include the costs of structural elements at The Mirage, Mandalay Bay, Luxor, New York-New York, Monte Carlo, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit, Beau Rivage, Borgata and National Harbor , including capital improvements that expand the footprint or square footage of any of the properties or extend the useful life of the properties, as well as equipment that would be a necessary improvement at any of the properties, including initial installation of elevators, air conditioning systems or electrical wiring. Such Non-Normal Tenant Improvements are capitalized and depreciated over the asset’s remaining life. Since the IPO Date, Non-Normal Tenant Improvements were $125.4 million through December 31, 2017 . In accordance with accounting standards governing the impairment or disposal of long-lived assets, the carrying value of long-lived assets, including land, buildings and improvements, land improvements and integral equipment is evaluated whenever events or changes in circumstances indicate that a potential impairment has occurred relative to a given asset or assets. Factors that could result in an impairment review include, but are not limited to, a current period cash flow loss combined with a history of cash flow losses, current cash flows that may be insufficient to recover the investment in the property over the remaining useful life, a projection that demonstrates continuing losses associated with the use of a long-lived asset, significant changes in the manner of use of the assets or significant changes in business strategies. If such circumstances arise, the Company uses an estimate of the undiscounted value of expected future operating cash flows to determine whether the long-lived assets are impaired. If the aggregate undiscounted cash flows plus net proceeds expected from disposition of the assets (if any) are less than the carrying amount of the assets, the resulting impairment charge to be recorded is calculated based on the excess of the carrying value of the assets over the fair value of such assets, with the fair value determined based on an estimate of discounted future cash flows, appraisals or other valuation techniques. There were no impairment charges related to long-lived assets recognized during the years ended December 31, 2017 , 2016 or 2015 . Cash and cash equivalents. Cash and cash equivalents include investments and interest bearing instruments with maturities of 90 days or less at the date of acquisition. Such investments are carried at cost, which approximates market value. Revenue recognition. Rental revenue under the Master Lease is recognized on a straight-line basis over the non-cancelable term and reasonably assured renewal periods, which includes the initial lease term of ten years and all four additional five -year terms under the Master Lease, for all contractual revenues that are determined to be fixed and measurable. The difference between such rental revenue earned and the cash rent due under the provisions of the Master Lease is recorded as deferred rent receivable and included as a component of tenant and other receivables, net or as deferred revenue if cash rent due exceeds rental revenue earned. Tenant reimbursement revenue arises from costs which the Company is the primary obligor that are required to be paid by the Tenant or reimbursed to the Company pursuant to the Master Lease. This revenue is recognized in the same periods as the expense is incurred. Deferred revenue. The Company recognizes the cost basis of Non-Normal Tenant Improvements as real estate investments and deferred revenue. The Company depreciates the real estate investments over their estimated useful lives applying the straight-line method and deferred revenue is amortized applying the straight-line method as additional rental revenue over the remaining term of the Master Lease once the related real estate assets are placed in service. Depreciation and property transactions. Depreciation expense is recognized over the useful lives of real estate applying the straight-line method. Useful lives are periodically reviewed. Leased real estate and leasehold improvements are depreciated on a straight-line basis over the following estimated useful lives: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Fixtures and integral equipment 3 to 20 years Property transactions, net are comprised of transactions related to long-lived assets, such as normal losses on the disposition of assets. Reimbursable expenses. Reimbursable expenses arise from costs which the Company is the primary obligor that are required to be reimbursed or paid directly by Tenant pursuant to the Master Lease including property taxes of the properties and ground lease rent. Reimbursable expenses also includes property insurance in the periods presented prior to the IPO Date. Acquisition-related expenses. The Company expenses transaction costs associated with acquisitions in the period in which they are incurred. These costs are included in acquisition-related expenses within the combined and consolidated statements of operations. General and administrative. General and administrative expenses include the salaries and benefits of employees and external consulting costs. In addition, pursuant to a corporate services agreement entered into on the IPO Date between the Operating Partnership and MGM (the “Corporate Services Agreement”), MGM provides the Operating Partnership and its subsidiaries with financial, administrative and operational support services, including accounting and finance support, human resources support, legal and regulatory compliance support, insurance advisory services, internal audit services, governmental affairs monitoring and reporting services, information technology support, construction services and various other support services. MGM is reimbursed for all costs it incurs directly related to providing the services thereunder. The Operating Partnership incurred expenses pursuant to the Corporate Services Agreement for the year ended December 31, 2017 of $1.6 million . The Operating Partnership incurred expenses pursuant to the Corporate Services Agreement from the IPO Date through December 31, 2016 of $0.9 million . Net income per share. Basic net income per share includes the weighted average number of Class A shares outstanding during the period. Dilutive net income per share includes the weighted average number of Class A shares and the dilutive effect of share-based compensation awards outstanding during the period, when such awards are dilutive. Net income per unit. Basic net income per unit includes the weighted average number of Operating Partnership units outstanding during the period. Dilutive net income per unit includes the weighted average number of Operating Partnership units and the dilutive effect of share-based compensation awards outstanding during the period, when such awards are dilutive. Deferred financing costs. Deferred financing costs were incurred in connection with the issuance of the term loan facilities, revolving credit facility and senior notes. Costs incurred in connection with term loan facilities and senior notes are capitalized and offset against the carrying amount of the related indebtedness. Costs incurred in connection with the Operating Partnership’s entrance into the revolving credit facility are capitalized as a component of prepaid expenses and other assets. These costs are amortized over the term of the indebtedness and are included in interest expense in the combined and consolidated statement of operations. The Company recognized non-cash interest expense related to the amortization of deferred financing costs of $11.4 million and $7.2 million during the year ended December 31, 2017 and 2016, respectively. Derivative financial instruments. The Company accounts for its derivatives in accordance with FASB ASC Topic 815, Derivatives and Hedging , in which all derivative instruments are reflected at fair value as either assets or liabilities. For derivative instruments that are designated and qualify as hedging instruments, the Company records the effective portion of the gain or loss on the hedge instruments as a component of accumulated other comprehensive income. Any ineffective portion of a derivative’s change in fair value is immediately recognized within net income. Fair value measurements . Fair value measurements are utilized in accounting for testing of long-lived assets for impairment. Fair value of financial and nonfinancial assets and liabilities is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs used in the methodologies of measuring fair value for assets and liabilities, is as follows: Level 1—Observable inputs for identical instruments such as quoted market prices; Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.) and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and Level 3—Unobservable inputs that reflect the Company’s determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including management’s own data. The fair value of the Company’s cash and cash equivalents, accounts payable and accrued expenses approximate their carrying value because of the short-term nature of these instruments. The following table summarizes the fair value of the Company’s other financial instruments as of December 31, 2017: Total Level 1 Level 2 Level 3 (in thousands) Assets: Derivative asset - interest rate swaps $ 11,306 $ — $ 11,306 $ — Liabilities: Senior secured credit facility: Senior secured term loan A facility 273,750 — 273,750 — Senior secured term loan B facility 1,822,169 — 1,822,169 — Senior secured revolving credit facility — — — — $1,050 million 5.625% senior notes, due 2024 1,126,125 — 1,126,125 — $500 million 4.50% senior notes, due 2026 496,250 — 496,250 — $350 million 4.50% senior notes, due 2028 $ 345,188 $ 345,188 $ 4,063,482 $ — $ 4,063,482 $ — The total principal balance of our debt was $4.0 billion at December 31, 2017 , with a fair value of $4.1 billion and $3.7 billion at December 31, 2017 and December 31, 2016, respectively. The estimated fair value was estimated using quoted prices for identical or similar liabilities in markets that are not active for each of the Company’s term loan A facility, term loan B facility, revolving credit facility and senior notes. These fair value measurements are considered Level 2 of the fair value hierarchy. Derivative assets and liabilities are carried at fair value. The fair value of interest rate swaps is determined based on the present value of expected future cash flows using observable, quoted LIBOR swap rates for the full term of the swap. The Company has determined that the majority of the inputs used to value its derivative assets fall within Level 2 of the fair value hierarchy. Income taxes. The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. Reportable segment. The Company’s real estate properties are similar to one another in that they consist of large-scale destination entertainment and leisure resorts and related offerings, whose tenants generally offer casino gaming, hotel, convention, dining, entertainment and retail, are held by a subsidiary of the Operating Partnership, have similar economic characteristics and are governed under a single Master Lease. As such, the properties are reported as one reportable segment. Concentrations of credit risk. All of the Company’s real estate properties have been leased to a wholly owned subsidiary of MGM, and all of the Company’s revenues are derived from the Master Lease. MGM is a publicly traded company and is subject to the filing requirements of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), and is required to file periodic reports on Form 10-K and Form 10-Q with the SEC. Refer to www.edgar.gov for MGM’s publicly available financial information. Management does not believe there are any other significant concentrations of credit risk. Geographical risk. The majority of the Company’s real estate properties are located in Las Vegas, Nevada. Accordingly, future negative trends in local economic activity or natural disasters in this area might have a more significant effect on the Company than a more geographically diversified entity and could have an adverse impact on its financial condition and operating results. Recently issued accounting standards. In August 2017, the FASB issued Accounting Standards Update No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (“ASU 2017-12”). ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, and interim periods within those years. ASU 2017-12 amends the hedge accounting recognition and presentation requirements in order to improve the transparency and understandability of information about an entity’s risk management activities, and simplifies the application of hedge accounting. The Company is currently assessing the impact that adoption of this guidance will have on its consolidated financial statements and footnote disclosures. In January 2017, the FASB issues Accounting Standards Update No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 clarifies the definition of a business and with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. We have elected to early adopt ASU 2017-01 as of January 1, 2017. The adoption of ASU 2017-01 did not have a material impact on the Company's financial statements and footnote disclosures. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which replaces the existing guidance in FASB ASC Topic 840, Leases . ASU 2016-02 requires a dual approach for lessee accounting under which a lessee would account for leases as finance leases or operating leases. Both finance leases and operating leases will result in the lessee recognizing a right-of-use (“ROU”) asset and a corresponding lease liability. For finance leases the lessee would recognize interest expense and amortization of the ROU asset and for operating leases the lessee would recognize a straight-line total lease expense. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently in the process of determining the method of adoption and assessing the impact that adoption of this guidance will have on its financial statements and footnote disclosures. In May 2014, the FASB issued ASC 606, Revenue from Contracts with Customers (Topic 606) which outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. Under the standard, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration the entity expects to receive in exchange for those goods and services. The Company adopted ASC 606 on January 1, 2018 and it did not have a material impact on the Company’s financial statements and footnote disclosures.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
ACQUISITIONS	ACQUISITIONS MGM National Harbor Transaction. On October 5, 2017, MGP completed the purchase of the long-term leasehold interest and real property improvements associated with MGM National Harbor casino resort (“MGM National Harbor”) for consideration consisting of the assumption of $425 million of debt, which was immediately paid off on the closing date, $462.5 million of cash and the issuance of 9.8 million Operating Partnership units to a subsidiary of MGM. The real estate assets related to MGM National Harbor were leased by the Landlord to the Tenant via an amendment to the Master Lease. As a result, the initial rent under the Master Lease increased by $95 million , $85.5 million of which relates to the base rent for the initial term and the remaining $9.5 million of which relates to the percentage rent. See Note 5 for further discussion of the Master Lease. The MGM National Harbor Transaction was accounted for as a transaction between entities under common control, and therefore the Company recorded the MGM National Harbor real estate assets at the carryover value of $1.18 billion from MGM. In addition, the Operating Partnership was assigned ground leases for an approximate 23 acres underlying MGM National Harbor, which the terms extends through 2082. Under the terms of the Master Lease, the Tenant is responsible for the rent payments related to the ground leases during the term of the Master Lease. Borgata Transaction. On August 1, 2016 , MGM completed the acquisition of Boyd Gaming Corporation’s ownership interest in Borgata. Concurrently, MGM, MGP, the Operating Partnership, the Landlord and the Tenant completed the transfer of the real estate assets related to Borgata, located at Renaissance Pointe in Atlantic City, New Jersey, from a subsidiary of MGM to the Landlord (the “Borgata Transaction”). A subsidiary of MGM operates Borgata. The consideration that was paid by MGP to a subsidiary of MGM consisted of 27.4 million newly issued Operating Partnership units and the assumption by the Operating Partnership of $545 million of indebtedness from such subsidiary of MGM. The real estate assets related to Borgata were leased by the Landlord to the Tenant via an amendment to the Master Lease. As a result, the initial rent under the Master Lease increased by $100 million , $90 million of which relates to the base rent for the initial term and the remaining $10 million of which relates to the percentage rent. Following the closing of the Borgata Transaction, the base rent under the Master Lease became $585 million for the initial term and the percentage rent became $65 million . See Note 5 for further discussion of the Master Lease. The Borgata Transaction was accounted for as a transaction between entities under common control, and therefore the Company recorded the Borgata real estate assets at the carryover value of $1.3 billion determined by MGM in its purchase price allocation, along with a related deferred tax liability of $25.3 million . In addition, the Company recognized an above market lease liability and an above market lease asset related to ground leases assigned to the Landlord as part of the Borgata Transaction covering approximately 11 acres partially underlying and adjacent to the Borgata. Under the terms of the Master Lease, the Tenant is responsible for the rent payments related to these ground leases during the term of the Master Lease. The Company amortizes the above market lease liability on a straight-line basis over the terms of the underlying ground leases, which extend through 2070 . The Company amortizes the above market lease asset on a straight-line basis over the term of the Master Lease, which extends through 2046 (including reasonably assured renewal periods).

Real Estate Investments

Real Estate Investments	12 Months Ended
	Dec. 31, 2017
Real Estate [Abstract]
REAL ESTATE INVESTMENTS	REAL ESTATE INVESTMENTS The carrying value of real estate investments is as follows: December 31, 2017 2016 (in thousands) Land $ 4,143,513 $ 4,143,513 Buildings, building improvements, land improvements and integral equipment 8,512,334 7,324,657 12,655,847 11,468,170 Less: Accumulated depreciation (2,633,909 ) (2,388,492 ) $ 10,021,938 $ 9,079,678

Leases

Leases	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
LEASES	LEASES Master Lease. Pursuant to the Master Lease, the Tenant has leased the Company’s real estate properties from the Landlord. The Master Lease is accounted for as an operating lease and has an initial lease term of ten years with the potential to extend the term for four additional five -year terms thereafter at the option of the Tenant. The Master Lease provides that any extension of its term must apply to all of the real estate under the Master Lease at the time of the extension. The Master Lease has a triple-net structure, which requires the Tenant to pay substantially all costs associated with the lease, including real estate taxes, insurance, utilities and routine maintenance, in addition to the base rent. Additionally, the Master Lease provides MGP with a right of first offer with respect to MGM’s development property located in Springfield, Massachusetts (the “ROFO Property”), which MGP may exercise should MGM elect to sell this property in the future. As of December 31, 2017 , the annual rent payments under the Master Lease were $756.7 million . Rent under the Master Lease consists of a “base rent” component and a “percentage rent” component. As of December 31, 2017, the base rent represents approximately 90% of the rent payments due under the Master Lease, or $682.2 million , and the percentage rent represents approximately 10% of the rent payments due under the Master Lease, or $74.5 million . The base rent includes a fixed annual rent escalator of 2.0% for the second through the sixth lease years (as defined in the Master Lease). Thereafter, the annual escalator of 2.0% will be subject to the Tenant and, without duplication, the operating subsidiary sublessees of the Tenant (the “Operating Subtenants”), collectively meeting an adjusted net revenue to rent ratio of 6.25 :1.00 based on their net revenue from the leased properties subject to the Master Lease (as determined in accordance with U.S. GAAP, adjusted to exclude net revenue attributable to certain scheduled subleases and, at the Tenant’s option, reimbursed cost revenue). The percentage rent will initially be a fixed amount for approximately the first six years and will then be adjusted every five years based on the average actual annual net revenues of the Tenant and, without duplication, the Operating Subtenants, from the leased properties subject to the Master Lease at such time for the trailing five calendar-year period (calculated by multiplying the average annual net revenues, excluding net revenue attributable to certain scheduled subleases and, at the Tenant’s option, reimbursed cost revenue, for the trailing five calendar-year period by 1.4% ). In connection with the Borgata Transaction on August 1, 2016, rent under the Master Lease increased by $100 million from the initial rent of $550 million , $90 million of which relates to the base rent for the initial term and the remaining $10 million of which relates to the percentage rent. Following the closing of the Borgata Transaction, the base rent under the Master Lease became $585 million for the initial term and the percentage rent became $65 million , prorated for the remainder of the first lease year after the Borgata Transaction. In connection with the commencement of the second lease year on April 1, 2017, the base rent under the Master Lease increased to $596.7 million , resulting in total annual rent under the Master Lease of $661.7 million . In connection with the MGM National Harbor Transaction on October 5, 2017, the base rent under the Master Lease increased to $682.2 million and the percentage rent to $74.5 million , prorated for the remainder of the second lease year, resulting in total annual rent under the Master Lease of $756.7 million . As a result of this transaction, the Master Lease was amended to provide that the initial term with respect to MGM National Harbor ends on August 31, 2024. Thereafter, the initial term of the Master Lease with respect to MGM National Harbor may be renewed at the option of the Tenant for an initial renewal period lasting until the earlier of the end of the then-current term of the Master Lease or the next renewal term (depending on whether MGM elects to renew the other properties under the Master Lease in connection with the expiration of the initial ten -year term). If, however, the Tenant chooses not to renew the lease with respect to MGM National Harbor after the initial MGM National Harbor term under the Master Lease, the Tenant would also lose the right to renew the Master Lease with respect to the rest of the properties when the initial ten -year lease term ends related to the rest of the properties in 2026. Straight-line rental revenues from the Master Lease for the year ended December 31, 2017 were $675.1 million . The Company also recognized revenue related to tenant reimbursements and other of $90.6 million for the year ended December 31, 2017 . Straight-line rental revenues from the Master Lease for the year ended December 31, 2016 were $419.2 million . Rental revenues from the Master Lease for the year ended December 31, 2016 represents activity from the IPO Date through December 31, 2016. The Company also recognized revenue related to tenant reimbursements and other of $48.3 million for the year ended December 31, 2016. Under the Master Lease, future non-cancelable minimum rental payments, which are the payments under the initial 10 -year term and does not include the four five -year renewal options, are as follows: Year ending December 31, (in thousands) 2018 $ 766,933 2019 780,782 2020 794,907 2021 809,315 2022 757,060 Thereafter 2,461,451 Total 6,370,448

Debt

Debt	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
DEBT	DEBT Debt consists of the following: December 31, 2017 2016 (in thousands) Senior secured credit facility: Senior secured term loan A facility $ 273,750 $ 292,500 Senior secured term loan B facility 1,817,625 1,840,750 Senior secured revolving credit facility — — $1,050 million 5.625% senior notes, due 2024 1,050,000 1,050,000 $500 million 4.50% senior notes, due 2026 500,000 500,000 $350 million 4.50% senior notes, due 2028 350,000 — 3,991,375 3,683,250 Less: Unamortized discount and debt issuance costs (56,747 ) (61,308 ) $ 3,934,628 $ 3,621,942 Operating Partnership bridge facilities. In connection with the Formation Transactions, MGM borrowed $4.0 billion under certain bridge facilities, which were subsequently contributed to the Operating Partnership pursuant to the MCA. The Operating Partnership repaid the bridge facilities with a combination of proceeds from its financing transactions described below and the proceeds from MGP’s initial public offering. In connection with the Borgata Transaction, MGM borrowed $545 million under certain bridge facilities, which were subsequently contributed to the Operating Partnership. The Operating Partnership repaid the bridge facilities with a combination of cash on hand and a draw down on its revolving credit facility, which it subsequently refinanced with proceeds from the offering of its senior notes due 2026. In connection with the MGM National Harbor Transaction, the Operating Partnership assumed $425 million of indebtedness, which the Operating Partnership repaid with a combination of cash on hand, proceeds from MGP’s September 2017 equity offering, and proceeds from the offering of its senior notes due 2028. Operating Partnership credit agreement. On the IPO Date, the Operating Partnership entered into a credit agreement, comprised of a $300 million senior secured term loan A facility, a $1.85 billion senior secured term loan B facility and a $600 million senior secured revolving credit facility. The term loan B facility was issued at 99.75% to initial lenders. The term loan facilities are subject to amortization of principal in equal quarterly installments, with 5.0% of the initial aggregate principal amount of the term loan A facility and 1.0% of the initial aggregate principal amount of the term loan B facility to be payable each year. The term loan facilities were recorded at cost net of the original issue discount and related borrowing costs. The related original issue discount and the borrowing costs are amortized over the term of the borrowing. The revolving credit facility is recorded at cost. The borrowing costs were capitalized as a component of prepaid expenses and other assets and are amortized over the term of the credit facility. The revolving credit facility and term loan A facility bore interest at LIBOR plus 2.75% for the first six months, and thereafter the interest rate is determined by reference to a total net leverage ratio pricing grid which would result in an interest rate of LIBOR plus 2.25% to 2.75% . The term loan B facility initially bore interest at LIBOR plus 3.25% with a LIBOR floor of 0.75% . On October 26, 2016, the Operating Partnership completed a re-pricing at par of its term loan B facility. As a result of the re-pricing, the term loan B facility bore interest at LIBOR plus 2.75% , with a LIBOR floor of 0.75% . In February 2017, MGP's corporate family rating was upgraded which resulted in the Operating Partnership receiving a further reduction in pricing to LIBOR plus 2.50% , with a LIBOR floor of 0.75% . On May 1, 2017, the Company completed another re-pricing of the Operating Partnership’s term loan B facility. As a result of this re-pricing, the term loan B facility bears interest at LIBOR plus 2.25% , with a LIBOR floor of 0% . The revolving credit facility and the term loan A facility will mature in 2021 and the term loan B facility will mature in 2023. As of December 31, 2017 , no amounts were drawn on the revolving credit facility. At December 31, 2017 , the interest rate on the term loan A facility was 4.32% and the interest rate on the term loan B facility was 3.82% . See Note 7 for further discussion of the Company's interest rate swap agreements related to the term loan B facility. The credit agreement contains customary representations and warranties, events of default and positive and negative covenants. These covenants are subject to a number of important exceptions and qualifications, including, with respect to the restricted payments covenant, the ability to make unlimited restricted payments to maintain the REIT status of MGP. The revolving credit facility and term loan A facility also require the Operating Partnership to maintain compliance with a maximum secured net debt to adjusted total asset ratio, a maximum total net debt to adjusted asset ratio and a minimum interest coverage ratio, all of which may restrict the Operating Partnership’s ability to incur additional debt to fund its obligations in the near term. As of December 31, 2017 , the Operating Partnership was required to have a senior secured net debt to adjusted total assets ratio of not more than 0.40 to1.00, a total net debt to adjusted total assets ratio of not more than 0.65 to 1.00, and an interest coverage ratio of not less than 2.00 to 1.00. The Operating Partnership was in compliance with its financial covenants at December 31, 2017 . The revolving credit facility and the term loan facilities are both guaranteed by each of the Operating Partnership’s existing and subsequently acquired direct and indirect wholly owned material domestic restricted subsidiaries, and secured by a first priority lien security interest on substantially all of the Operating Partnership’s and such restricted subsidiaries’ material assets, excluding the real estate assets of MGM National Harbor, including mortgages on its real estate, subject to customary exclusions. Operating Partnership senior notes. On April 20, 2016, a wholly owned subsidiary of the Operating Partnership issued $1.05 billion in aggregate principal amount of 5.625% senior notes due 2024 and on the IPO Date, the Operating Partnership entered into a supplemental indenture through which it assumed the obligations under the senior notes from such subsidiary (which merged into the Operating Partnership on such date). The senior notes will mature on May 1, 2024. Interest on the senior notes is payable on May 1 and November 1 of each year, commencing on November 1, 2016. On August 12, 2016, the Operating Partnership issued $500 million in aggregate principal amount of 4.50% senior notes due 2026. The senior notes will mature on September 1, 2026. Interest on the senior notes is payable on March 1 and September 1 of each year, commencing on March 1, 2017. On September 7, 2017, the Operating Partnership issued $350 million in aggregate principal amount of 4.50% senior notes due 2028. The senior notes will mature on January 15, 2028. Interest on the senior notes is payable on January 15 and July 15 of each year, commencing on January 15, 2018. Each series of the Operating Partnership's senior notes are fully and unconditionally guaranteed, jointly and severally, on a senior basis by all of the Operating Partnership’s subsidiaries that guarantee the Operating Partnership’s credit facilities, other than MGP Finance Co-Issuer, Inc., which is a co-issuer of the senior notes. The Operating Partnership may redeem all or part of the senior notes at a redemption price equal to 100% of the principal amount of the senior notes plus, to the extent the Operating Partnership is redeeming senior notes prior to the date that is three months prior to their maturity date, an applicable make whole premium, plus, in each case, accrued and unpaid interest. The indentures governing the senior notes contain customary covenants and events of default. These covenants are subject to a number of important exceptions and qualifications set forth in the applicable indentures governing the senior notes, including, with respect to the restricted payments covenants, the ability to make unlimited restricted payments to maintain the REIT status of MGP. Maturities of debt. Maturities of the principal amount of the Company’s debt as of December 31, 2017 are as follows: Year ending December 31, (in thousands) 2018 $ 33,500 2019 33,500 2020 33,500 2021 247,250 2022 18,500 Thereafter 3,625,125 $ 3,991,375

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES AND HEDGING ACTIVITIES	DERIVATIVES AND HEDGING ACTIVITIES The Company uses derivative instruments to mitigate the effects of interest rate volatility inherent in its variable rate debt, which could unfavorably impact our future earnings and forecasted cash flows. The Company does not use derivative instruments for speculative or trading purposes. As of December 31, 2017 and 2016, all of the Company's derivative financial instruments have been designated as cash flow hedges and qualify for hedge accounting. The Operating Partnership is party to interest rate swaps to mitigate the interest rate risk inherent in its senior secured term loan B facility. In May 2017 in connection with the term loan B re-pricing, the Company amended its outstanding interest rate swap agreements. As of December 31, 2017, the Company pays a weighted average fixed rate of 1.844% on total notional amount of $1.2 billion and the variable rate received will reset monthly to the one-month LIBOR, with no minimum floor. As of December 31, 2016, the Company had interest rate swaps with a notional amount of $500 million outstanding with a weighted average fixed rate of 1.825% . The following table summarizes the fair value and the presentation in the Company’s balance sheet: December 31, Location on Balance Sheet 2017 2016 (in thousands) Interest rate swaps - cash flow hedges Prepaid expenses and other assets $ 11,306 $ 1,879 Interest rate swaps valued in net unrealized gain positions are recognized as asset balances within the prepaid expenses and other assets. Interest rate swaps valued in net unrealized loss positions are recognized as liability balances within accounts payable, accrued expenses and other liabilities. For the years ended December 31, 2017 and 2016, the amount recorded in other comprehensive income related to the derivative instruments was a net gain of $9.8 million and a net gain of $1.9 million , respectively. There was no material ineffective portion of the change in fair value derivatives. For the years ended December 31, 2017 and 2016, the Company recorded interest expense of $9.2 million and $0.4 million , respectively, related to the swap agreements.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company elected to be treated as a REIT as defined under Section 856(a) of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with its taxable year ended December 31, 2016. To qualify as a REIT, the Company must meet certain organizational, income, asset and distribution tests. Accordingly, except as described below, the Company will generally not be subject to corporate U.S. federal or state income tax to the extent that it makes qualifying distributions of all of its taxable income to its shareholders and provided it satisfies on a continuing basis, through actual investment and operating results, the REIT requirements, including certain asset, income, distribution and share ownership tests. U.S. federal income tax law generally requires that a REIT distribute annually at least 90% of its REIT taxable income, without regard to the deduction for dividends paid and excluding net capital gains, and that it pays taxes at regular corporate income tax rates to the extent that it annually distributes less than 100% of its taxable income. The Company distributed 100% of its taxable income in the taxable year ended December 31, 2017. Accordingly, for periods subsequent to the IPO Date, the accompanying combined and consolidated financial statements do not reflect a provision for federal income taxes. However, the Company may still be subject to federal excise tax, as well as certain state and local income and franchise taxes. On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act makes broad and complex changes to the U.S. tax code, including, but not limited to, reducing the U.S. federal corporate tax rate from 35 percent to 21 percent, creating a new limitation on deductible interest expense, and significantly changing the manner in which income from foreign operations are taxed in the U.S. Given that the Company is not subject to corporate U.S. federal income tax to the extent that it makes qualifying distributions of all of its taxable income to its shareholders, changes made by the Tax Act had no impact on the provision for federal income taxes for the year ended December 31, 2017. The SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”), which provides guidance on accounting for the tax effects of the Tax Act. SAB 118 provides a measurement period that should not extend beyond one year from the Tax Act enactment date for companies to complete the accounting under ACS 740, Income Taxes (“ASC 740”). In accordance with SAB 118, a company must reflect the income tax effects of those aspects of the Act for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of the Tax Act is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of the Tax Act. The Company’s accounting for the Tax Act is complete. The Landlord is required to join in the filing of a New Jersey consolidated corporation business tax return under the New Jersey Casino Control Act and include in such return its income and expenses associated with its New Jersey assets and is thus subject to an entity level tax in New Jersey. Although the consolidated New Jersey return also includes MGM and certain of its subsidiaries, the Company is required to record New Jersey state income taxes in the accompanying combined and consolidated financial statements as if the Landlord was taxed for state purposes on a stand-alone basis. The Company and MGM have entered into a tax sharing agreement providing for an allocation of taxes due in the consolidated New Jersey return. Pursuant to this agreement, the Landlord will only be responsible for New Jersey taxes on any gain that may be realized upon a future sale of the New Jersey assets resulting solely from an appreciation in value of such assets over their value on the date they were contributed to the Landlord by a subsidiary of MGM. MGM is responsible for all other taxes reported in the New Jersey consolidated return. No amounts are due to MGM under the tax sharing agreement as of December 31, 2017. Accordingly, the provision for current taxes and the deferred tax liability in the accompanying combined and consolidated financial statements are attributable to noncontrolling interest since the payment of such taxes are the responsibility of MGM. The Company was included in the consolidated or unitary income tax returns of MGM for all Predecessor periods. In the accompanying financial statements, the Predecessor periods reflect an allocation of income taxes from MGM as if the Company's Predecessor had filed a separate tax return in those periods. The provision for income taxes attributable to income (loss) before income taxes is as follows: Year Ended December 31, 2017 2016 2015 (in thousands) Federal: Current $ — $ — $ — Deferred — — — Provision for federal income taxes $ — $ — $ — State: Current $ 1,729 $ 2,156 $ — Deferred 3,177 108 — Provision for state income taxes $ 4,906 $ 2,264 $ — A reconciliation of the federal income tax statutory rate and the Company’s effective tax rate is as follows: Year Ended December 31, 2017 2016 2015 Federal income tax statutory rate 35.0 % 35.0 % 35.0 % Federal valuation allowance — — (35.0 ) Income not subject to federal income tax (35.0 ) (35.0 ) — State taxes 2.9 6.0 — Effective tax rate 2.9 % 6.0 % — % The major tax-effected components of the Company’s net deferred tax liability are as follows: December 31, 2017 2016 (in thousands) Deferred tax liability – federal and state Real estate investments, net $ 28,544 $ 25,368 Total deferred tax liability $ 28,544 $ 25,368 The Company assesses its tax positions using a two-step process. A tax position is recognized if it meets a “more likely than not” threshold, and is measured at the largest amount of benefit that is greater than 50% likely of being realized. Uncertain tax positions must be reviewed at each balance sheet date. Liabilities recorded as a result of this analysis must generally be recorded separately from any current or deferred income tax accounts. The Company currently has no uncertain tax positions. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense. No interest or penalties were recorded for the years ended December 31, 2017 or December 31, 2016. The Company files income tax returns in the U.S. federal jurisdiction and various state and local jurisdictions. All returns are subject to examination by the relevant taxing authorities as of December 31, 2017.

Shareholders' Equity and Partne

Shareholders' Equity and Partners' Capital	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
SHAREHOLDERS' EQUITY AND PARTNERS' CAPITAL	SHAREHOLDERS’ EQUITY AND PARTNERS’ CAPITAL MGP shareholders . On the IPO Date, MGP completed the initial public offering of 57,500,000 of its Class A shares representing limited liability company interests. MGM retained ownership of MGP’s single Class B share. The Class B share is a non-economic interest in MGP which does not provide its holder any rights to profits or losses or any rights to receive distributions from operations of MGP or upon liquidation or winding up of MGP. MGP’s Class B shareholder is entitled to an amount of votes representing a majority of the total voting power of MGP’s shares. If the holder of the Class B share and its controlled affiliates’ (excluding MGP and its subsidiaries) aggregate beneficial ownership of the combined economic interests in MGP and the Operating Partnership falls below 30% , the Class B share is no longer entitled to any voting rights. To the extent that the Class B share is entitled to majority voting power pursuant to MGP’s operating agreement, MGM may only transfer the Class B share (other than transfers to us and MGM’s controlled affiliates) if and to the extent that such transfer is approved by special approval by an independent conflicts committee, not to be unreasonably withheld. When determining whether to grant such approval, the conflicts committee must take into account the interests of MGP’s Class A shareholders and MGP ahead of the interests of the holder of the Class B share. No par value is attributed to the MGP’s Class A and Class B shares. On September 11, 2017, MGP completed an offering of 13,225,000 Class A shares representing limited liability company interests in a registered public offering, including 1,725,000 Class A shares sold pursuant to the exercise in full by the underwriters of their over-allotment option, for net proceeds of approximately $387.5 million after deducting underwriting discounts and commissions and estimated offering expenses. The net proceeds were contributed to the Operating Partnership in exchange for Operating Partnership units. Operating Partnership capital . On the IPO Date, MGP contributed the proceeds from its initial public offering to the Operating Partnership in exchange for 26.7% of the outstanding Operating Partnership units in the Company. Certain subsidiaries of MGM also acquired 73.3% of the outstanding Operating Partnership units on the IPO Date. As of August 1, 2016, the date of the Borgata Transaction, MGP’s indirect ownership percentage in the Operating Partnership units was reduced to 23.7% and MGM's indirect ownership percentage increased to 76.3% . As of September 11, 2017, as a result of the equity offering noted above, MGP's ownership percentage in the Operating Partnership units increased to 27.7% and MGM's ownership percentage in the Operating Partnership units decreased to 72.3% . As of October 5, 2017, the date of the MGM National Harbor Transaction, MGP’s indirect ownership percentage in the Operating Partnership units reduced to 26.6% and MGM's indirect ownership percentage increased to 73.4% . MGP dividends and Operating Partnership distributions. The following table presents the distributions declared and paid by the Operating Partnership and the dividends declared and paid by MGP. MGP pays its dividends with the receipt of its share of the Operating Partnership's distributions. Declaration Date Record Date Distribution/ Dividend Per Unit/ Share Payment Date Operating Partnership Distribution Amount MGP Class A Dividend Amount (in thousands, except per unit and per share amount) 2017 March 15, 2017 March 31, 2017 $ 0.3875 April 13, 2017 $ 94,109 $ 22,281 June 15, 2017 June 30, 2017 $ 0.3950 July 14, 2017 $ 95,995 $ 22,777 September 15, 2017 September 29, 2017 $ 0.3950 October 13, 2017 $ 101,222 $ 28,004 December 15, 2017 December 29, 2017 $ 0.4200 January 16, 2018 $ 111,733 $ 29,777 2016 June 16, 2016 June 30, 2016 $ 0.2632 (1) July 15, 2016 $ 56,720 $ 15,134 September 15, 2016 September 30, 2016 $ 0.3875 October 14, 2016 $ 94,109 $ 22,281 December 15, 2016 December 30, 2016 $ 0.3875 January 16, 2017 $ 94,109 $ 22,281 (1) Amount is based on a distribution and dividend of $0.3575 per Operating Partnership unit and Class A share for a full quarter. Dividends with respect to MGP’s Class A shares are characterized for federal income tax purposes as taxable ordinary dividends, capital gains dividends, non-dividend distributions or a combination thereof. For the period from January 1, 2017 through December 31, 2017 our dividend per Class A share attributable to 2017 was $1.5297 , characterized as $1.1542 ordinary dividends and $0.3755 non-dividend distributions.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME	ACCUMULATED OTHER COMPREHENSIVE INCOME Comprehensive income includes net income and all other non-shareholder changes in equity, or other comprehensive income. Elements of the Company's accumulated other comprehensive income are reported in the accompanying combined and consolidated statement of shareholders' equity. The following table summarizes the changes in accumulated other comprehensive income: Cash Flow Hedges (in thousands) Balance, December 31, 2015 $ — Other comprehensive income before reclassifications 1,521 Amounts reclassified from accumulated other comprehensive income to interest expense 358 Balance, December 31, 2016 1,879 Other comprehensive income before reclassifications 566 Amounts reclassified from accumulated other comprehensive income to interest expense 9,216 Net current period other comprehensive income 9,782 Balance, December 31, 2017 11,661 Other comprehensive loss attributable to noncontrolling interest (8,553 ) Accumulated other comprehensive income attributable to Class A shareholders $ 3,108

Net Income Per Class A Share

Net Income Per Class A Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
NET INCOME PER CLASS A SHARE	NET INCOME PER CLASS A SHARE The table below provides net income and the number of Class A shares used in the computations of “basic” net income per share, which utilizes the weighted-average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” net income per share, which includes all such shares. Net income attributable to Class A shares, weighted average Class A shares outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Net income per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Basic net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Basic net income per Class A share $ 0.68 $ 0.52 Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Diluted net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 183,410 249,331 Weighted average shares for diluted net income per Class A share 61,916,546 57,751,489 Diluted net income per Class A share (3) $ 0.67 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive. (3) Diluted net income per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. NET INCOME PER OPERATING PARTNERSHIP UNIT The table below provides net income and the number of Operating Partnership units used in the computations of “basic” net income per Operating Partnership unit, which utilizes the weighted-average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” net income per Operating Partnership units, which includes all such Operating Partnership units. Net income attributable to Operating Partnership units, weighted average Operating Partnership units outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Basic net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Basic net income per Operating Partnership unit $ 0.67 $ 0.52 Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Diluted net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Effect of dilutive units for diluted net income per Operating Partnership unit (2) 183,410 249,331 Weighted average units for diluted net income per Operating Partnership unit 249,634,668 232,430,401 Diluted net income per Operating Partnership unit $ 0.66 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive.

Net Income Per Operating Partne

Net Income Per Operating Partnership Unit	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
NET INCOME PER OPERATING PARTNERSHIP UNIT	NET INCOME PER CLASS A SHARE The table below provides net income and the number of Class A shares used in the computations of “basic” net income per share, which utilizes the weighted-average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” net income per share, which includes all such shares. Net income attributable to Class A shares, weighted average Class A shares outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Net income per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Basic net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Basic net income per Class A share $ 0.68 $ 0.52 Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Diluted net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 183,410 249,331 Weighted average shares for diluted net income per Class A share 61,916,546 57,751,489 Diluted net income per Class A share (3) $ 0.67 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive. (3) Diluted net income per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. NET INCOME PER OPERATING PARTNERSHIP UNIT The table below provides net income and the number of Operating Partnership units used in the computations of “basic” net income per Operating Partnership unit, which utilizes the weighted-average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” net income per Operating Partnership units, which includes all such Operating Partnership units. Net income attributable to Operating Partnership units, weighted average Operating Partnership units outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Basic net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Basic net income per Operating Partnership unit $ 0.67 $ 0.52 Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Diluted net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Effect of dilutive units for diluted net income per Operating Partnership unit (2) 183,410 249,331 Weighted average units for diluted net income per Operating Partnership unit 249,634,668 232,430,401 Diluted net income per Operating Partnership unit $ 0.66 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Ground leases. The Landlord was assigned ground leases in connection with the Borgata Transaction and the MGM National Harbor Transaction, as discussed in Note 3. Such amounts will be paid by the Tenant pursuant to the Master Lease through 2046 (including renewal periods). Non-cancelable minimum lease payments pursuant to the ground leases through 2070 for the Borgata Transaction and through 2082 for the MGM National Harbor Transaction are as follows: Year ending December 31, (in thousands) 2018 $ 16,203 2019 17,585 2020 19,145 2021 23,024 2022 23,024 Thereafter 1,303,098 $ 1,402,079 Litigation. In the ordinary course of business, from time to time, the Company expects to be subject to legal claims and administrative proceedings, none of which are currently outstanding, which the Company believes could have, individually or in the aggregate, a material adverse effect on its business, financial condition or results of operations, liquidity or cash flows.

Consolidating Financial Informa

Consolidating Financial Information	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
CONSOLIDATING FINANCIAL INFORMATION	CONSOLIDATING FINANCIAL INFORMATION The Operating Partnership’s senior notes were co-issued by the Operating Partnership and MGP Finance Co-Issuer, Inc., a 100% owned finance subsidiary of the Operating Partnership. Obligations to pay principal and interest on the senior notes are currently guaranteed by all of the Operating Partnership’s subsidiaries, other than MGP Finance Co-Issuer, Inc., each of which is directly or indirectly 100% owned by the Operating Partnership. Such guarantees are full and unconditional, and joint and several and are subject to release in accordance with the events described below. Separate condensed financial information for the subsidiary guarantors as of December 31, 2017 and 2016 and for the year ended December 31, 2017 and 2016 are presented below. The guarantee of a subsidiary guarantor will be automatically released upon (i) a sale or other disposition (including by way of consolidation or merger) of the subsidiary guarantor, or the capital stock of the subsidiary guarantor; (ii) the sale or disposition of all or substantially all of the assets of the subsidiary guarantor; (iii) the designation in accordance with the indenture of a subsidiary guarantor as an unrestricted subsidiary; (iv) at such time as such subsidiary guarantor is no longer a subsidiary guarantor or other obligor with respect to any credit facilities or capital markets indebtedness of the Operating Partnership; or (v) defeasance or discharge of the notes. Comparative information as of and for the year ended December 31, 2015 is not presented because such date and period precede the date at which the Operating Partnership and its subsidiaries were formed. The financial information for all dates and periods preceding the formation of the Operating Partnership and its subsidiaries is solely attributable to the Predecessor, which following the IPO Date, has been combined retrospectively with the Operating Partnership and its subsidiaries for all periods, as discussed in Note 2. Consequently, consolidating financial information for periods preceding the formation of the Operating Partnership and its subsidiaries would be presented entirely within the guarantor column and would be the same as the Operating Partnership's combined financial statements. CONSOLIDATING BALANCE SHEET INFORMATION December 31, 2017 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Real estate investments, net $ 488 $ — $ 10,021,450 $ — $ 10,021,938 Cash and cash equivalents 259,722 — — — 259,722 Tenant and other receivables, net 299 — 6,086 — 6,385 Intercompany 1,383,397 — — (1,383,397 ) — Prepaid expenses and other assets 18,487 — — — 18,487 Investments in subsidiaries 8,479,388 — — (8,479,388 ) — Above market lease, asset — — 44,588 — 44,588 $ 10,141,781 $ — $ 10,072,124 $ (9,862,785 ) $ 10,351,120 Debt, net 3,934,628 — — — 3,934,628 Due to MGM Resorts International and affiliates 962 — — — 962 Intercompany — — 1,383,397 (1,383,397 ) — Accounts payable, accrued expenses, and other liabilities 4,154 — 6,086 — 10,240 Above market lease, liability — — 47,069 — 47,069 Accrued interest 22,565 — — — 22,565 Distribution payable 111,733 — — — 111,733 Deferred revenue — — 127,640 — 127,640 Deferred income taxes, net — — 28,544 — 28,544 Total liabilities 4,074,042 — 1,592,736 (1,383,397 ) 4,283,381 General partner — — — — — Limited partners 6,067,739 — 8,479,388 (8,479,388 ) 6,067,739 Total partners' capital 6,067,739 — 8,479,388 (8,479,388 ) 6,067,739 Total liabilities and partners' capital $ 10,141,781 $ — $ 10,072,124 $ (9,862,785 ) $ 10,351,120 CONSOLIDATING BALANCE SHEET INFORMATION December 31, 2016 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Real estate investments, net $ — $ — $ 9,079,678 $ — $ 9,079,678 Cash and cash equivalents 360,492 — — — 360,492 Tenant and other receivables, net 2,059 — 7,444 — 9,503 Intercompany 880,823 — — (880,823 ) — Prepaid expenses and other assets 9,167 — 1,739 — 10,906 Investments in subsidiaries 8,100,942 — — (8,100,942 ) — Above market lease, asset — — 46,161 — 46,161 $ 9,353,483 $ — $ 9,135,022 $ (8,981,765 ) $ 9,506,740 Debt, net 3,621,942 — — — 3,621,942 Due to MGM Resorts International and affiliates — — 166 — 166 Intercompany — — 880,823 (880,823 ) — Accounts payable, accrued expenses, and other liabilities 3,034 — 7,444 — 10,478 Above market lease, liability — — 47,957 — 47,957 Accrued interest 26,137 — — — 26,137 Distribution payable 94,109 — — — 94,109 Deferred revenue — — 72,322 — 72,322 Deferred income taxes, net — — 25,368 — 25,368 Total liabilities 3,745,222 — 1,034,080 (880,823 ) 3,898,479 General partner — — — — — Limited partners 5,608,261 — 8,100,942 (8,100,942 ) 5,608,261 Total partners' capital 5,608,261 — 8,100,942 (8,100,942 ) 5,608,261 Total liabilities and partners' capital $ 9,353,483 $ — $ 9,135,022 $ (8,981,765 ) $ 9,506,740 CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION Year Ended December 31, 2017 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Revenues Rental revenue $ — $ — $ 675,089 $ — $ 675,089 Tenant reimbursements and other — — 90,606 — 90,606 — — 765,695 — 765,695 Expenses Depreciation — — 260,455 — 260,455 Property transactions, net — — 34,022 — 34,022 Reimbursable expenses — — 88,254 — 88,254 Amortization of above market lease, net — — 686 — 686 Acquisition-related expenses 17,304 — — — 17,304 General and administrative 12,189 — — — 12,189 29,493 — 383,417 — 412,910 Operating income (loss) (29,493 ) — 382,278 — 352,785 Equity in earnings of subsidiaries 377,372 — — (377,372 ) — Non-operating income (expense) Interest income 3,907 — — — 3,907 Interest expense (184,175 ) — — — (184,175 ) Other non-operating (1,621 ) — — — (1,621 ) (181,889 ) — — — (181,889 ) Income (loss) before income taxes 165,990 — 382,278 (377,372 ) 170,896 Provision for income taxes — — (4,906 ) — (4,906 ) Net income (loss) $ 165,990 $ — $ 377,372 $ (377,372 ) $ 165,990 Other comprehensive income (loss) Net income (loss) 165,990 — 377,372 (377,372 ) 165,990 Unrealized gain on cash flow hedges 9,782 — — — 9,782 Comprehensive income (loss) $ 175,772 $ — $ 377,372 $ (377,372 ) $ 175,772 CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION Year Ended December 31, 2016 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Revenues Rental revenue $ — $ — $ 419,239 $ — $ 419,239 Tenant reimbursements and other — — 48,309 — 48,309 — — 467,548 — 467,548 Expenses Depreciation — — 220,667 — 220,667 Property transactions, net — — 4,684 — 4,684 Reimbursable expenses — — 68,063 — 68,063 Amortization of above market lease, net — — 286 — 286 Acquisition-related expenses 10,178 — — — 10,178 General and administrative 9,896 — — — 9,896 20,074 — 293,700 — 313,774 Operating income (loss) (20,074 ) — 173,848 — 153,774 Equity in earnings of subsidiaries 171,584 — — (171,584 ) — Non-operating income (expense) Interest income 774 — — — 774 Interest expense (116,212 ) — — — (116,212 ) Other non-operating (726 ) — — — (726 ) (116,164 ) — — — (116,164 ) Income (loss) before income taxes 35,346 — 173,848 (171,584 ) 37,610 Provision for income taxes — — (2,264 ) — (2,264 ) Net income (loss) $ 35,346 $ — $ 171,584 $ (171,584 ) $ 35,346 Other comprehensive income (loss) Net income (loss) 35,346 — 171,584 (171,584 ) 35,346 Unrealized gain on cash flow hedges 1,879 — — — 1,879 Comprehensive income (loss) $ 37,225 $ — $ 171,584 $ (171,584 ) $ 37,225 CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION Year Ended December 31, 2017 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Cash flows from operating activities Net cash provided by (used in) operating activities $ (198,925 ) $ — $ 681,503 $ — $ 482,578 Cash flows from investing activities Capital expenditures for property and equipment funded by Parent (488 ) — — — (488 ) MGM National Harbor transaction (462,500 ) — — — (462,500 ) Net cash used in investing activities (462,988 ) — — — (462,988 ) Cash flows from financing activities Proceeds from issuance of debt 350,000 — — — 350,000 Deferred financing costs (5,598 ) — — — (5,598 ) Repayment of assumed debt (425,000 ) — — — (425,000 ) Repayment of debt principal (41,875 ) — — — (41,875 ) Proceeds from purchase of Operating Partnership units by MGP 387,548 — — — 387,548 Distributions paid (385,435 ) — — — (385,435 ) Cash received by Parent on behalf of Guarantor Subsidiaries 681,503 — (681,503 ) — — Net cash provided by financing activities 561,143 — (681,503 ) — (120,360 ) Cash and cash equivalents Net decrease for the period (100,770 ) — — — (100,770 ) Balance, beginning of period 360,492 — — — 360,492 Balance, end of period $ 259,722 $ — $ — $ — $ 259,722 CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION Year Ended December 31, 2016 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Cash flows from operating activities Net cash provided by (used in) operating activities $ (99,884 ) $ — $ 397,665 $ — $ 297,781 Cash flows from investing activities Capital expenditures for property and equipment funded by Parent — — (138,987 ) — (138,987 ) Net cash used in investing activities — — (138,987 ) — (138,987 ) Cash flows from financing activities Proceeds from issuance of debt 3,700,000 — — — 3,700,000 Deferred financing costs (77,163 ) — — — (77,163 ) Repayment of bridge facilities (4,544,850 ) — — — (4,544,850 ) Repayment of debt principal (16,750 ) — — — (16,750 ) Proceeds from purchase of Operating Partnership units by MGP 1,132,468 — — — 1,132,468 Distributions paid (150,829 ) — — — (150,829 ) Cash received by Parent on behalf of Guarantor Subsidiaries 417,500 — (417,500 ) — — Net cash transfers from Parent — — 158,822 — 158,822 Net cash provided by financing activities 460,376 — (258,678 ) — 201,698 Cash and cash equivalents Net increase for the period 360,492 — — — 360,492 Balance, beginning of period — — — — — Balance, end of period $ 360,492 $ — $ — $ — $ 360,492

MGP Selected Quarterly Financia

MGP Selected Quarterly Financial Results (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
MGP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED)	MGP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarter First Second Third Fourth Total (in thousands, except per share data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income attributable to Class A shareholders 11,348 10,680 11,025 8,722 41,775 Net income per Class A share (basic) $ 0.20 $ 0.19 $ 0.18 $ 0.12 $ 0.68 Net income per Class A share (diluted) $ 0.20 $ 0.18 $ 0.18 $ 0.12 $ 0.67 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income attributable to Class A shareholders — 6,953 10,591 12,394 29,938 Net income per Class A share (basic) N/A $ 0.12 $ 0.18 $ 0.22 $ 0.52 Net income per Class A share (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Because net income per Class A share amounts are calculated using the weighted average number of basic and dilutive Class A shares outstanding during each quarter, the sum of the per share amounts for the four quarters does not equal the total net income per Class A share amounts for the year. The following sections list certain items affecting comparability of quarterly and year-to-date results and related per share amounts. Additional information related to these items is included elsewhere in the notes to the accompanying financial statements. In the fourth quarter of 2017, on October 5, 2017, MGM, MGP, the Operating Partnership, the Landlord and the Tenant completed the MGM National Harbor Transaction. The real estate assets related to MGM National Harbor were leased by the Landlord to the Tenant via an amendment to the Master Lease. As a result, the initial rent under the Master Lease increased by $95 million , $85.5 million of which relates to the base rent for the remainder of the 2017 lease year and the remaining $9.5 million of which relates to the percentage rent. In the second quarter of 2016, on the IPO Date the Company completed the Formation Transactions, including its initial public offering and the commencement of the Master Lease. In the third quarter of 2016, on August 1, 2016, MGM, MGP, the Operating Partnership, the Landlord and the Tenant completed the Borgata Transaction. The real estate assets related to Borgata were leased by the Landlord to the Tenant via an amendment to the Master Lease. As a result, the initial rent under the Master Lease increased by $100 million , $90 million of which relates to the base rent for the initial lease year and the remaining $10 million of which relates to the percentage rent. OPERATING PARTNERSHIP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarter First Second Third Fourth Total (in thousands, except per unit data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income per Operating Partnership unit (basic) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.67 Net income per Operating Partnership unit (diluted) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.66 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income per Operating Partnership unit (basic) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Net income per Operating Partnership unit (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 See Note 15 for a discussion of items affecting comparability for the years ended December 31, 2017 and 2016, which are the same for the Operating Partnership.

Operating Partnership Selected

Operating Partnership Selected Quarterly Financial Results (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Operating Partnership Selected Quarterly Financial Results (Unaudited)	MGP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarter First Second Third Fourth Total (in thousands, except per share data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income attributable to Class A shareholders 11,348 10,680 11,025 8,722 41,775 Net income per Class A share (basic) $ 0.20 $ 0.19 $ 0.18 $ 0.12 $ 0.68 Net income per Class A share (diluted) $ 0.20 $ 0.18 $ 0.18 $ 0.12 $ 0.67 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income attributable to Class A shareholders — 6,953 10,591 12,394 29,938 Net income per Class A share (basic) N/A $ 0.12 $ 0.18 $ 0.22 $ 0.52 Net income per Class A share (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Because net income per Class A share amounts are calculated using the weighted average number of basic and dilutive Class A shares outstanding during each quarter, the sum of the per share amounts for the four quarters does not equal the total net income per Class A share amounts for the year. The following sections list certain items affecting comparability of quarterly and year-to-date results and related per share amounts. Additional information related to these items is included elsewhere in the notes to the accompanying financial statements. In the fourth quarter of 2017, on October 5, 2017, MGM, MGP, the Operating Partnership, the Landlord and the Tenant completed the MGM National Harbor Transaction. The real estate assets related to MGM National Harbor were leased by the Landlord to the Tenant via an amendment to the Master Lease. As a result, the initial rent under the Master Lease increased by $95 million , $85.5 million of which relates to the base rent for the remainder of the 2017 lease year and the remaining $9.5 million of which relates to the percentage rent. In the second quarter of 2016, on the IPO Date the Company completed the Formation Transactions, including its initial public offering and the commencement of the Master Lease. In the third quarter of 2016, on August 1, 2016, MGM, MGP, the Operating Partnership, the Landlord and the Tenant completed the Borgata Transaction. The real estate assets related to Borgata were leased by the Landlord to the Tenant via an amendment to the Master Lease. As a result, the initial rent under the Master Lease increased by $100 million , $90 million of which relates to the base rent for the initial lease year and the remaining $10 million of which relates to the percentage rent. OPERATING PARTNERSHIP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarter First Second Third Fourth Total (in thousands, except per unit data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income per Operating Partnership unit (basic) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.67 Net income per Operating Partnership unit (diluted) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.66 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income per Operating Partnership unit (basic) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Net income per Operating Partnership unit (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 See Note 15 for a discussion of items affecting comparability for the years ended December 31, 2017 and 2016, which are the same for the Operating Partnership.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2017
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION	SCHEDULE III — REAL ESTATE AND ACCUMULATED DEPRECIATION (in thousands) December 31, 2017 Acquisition Costs (a) Costs Gross Amount (b) Property (c) Encumbrances Land Building and Improvements Land Building and Improvements Land Building and Improvements Total Accumulated Depreciation Year Acquired Useful Life (d) Investment Properties: New York-New York e $ 149,984 $ 484,001 $ — $ — $ 149,984 $ 484,738 $ 634,722 $ (282,949 ) 2016 f The Mirage e 1,017,562 760,222 — — 1,017,562 759,386 1,776,948 (467,094 ) 2016 f Mandalay Bay e 1,199,785 1,882,381 — — 1,199,785 1,873,959 3,073,744 (681,192 ) 2016 f Luxor e 440,685 710,796 — — 440,685 705,909 1,146,594 (327,832 ) 2016 f Excalibur e 814,805 342,685 — 43,350 814,805 383,754 1,198,559 (131,675 ) 2016 f Monte Carlo e 291,035 376,625 — 82,048 291,035 391,103 682,138 (146,147 ) 2016 f Beau Rivage e 104,945 561,457 — — 104,945 560,404 665,349 (241,814 ) 2016 f MGM Grand Detroit e 52,509 597,324 — — 52,509 597,324 649,833 (161,804 ) 2016 f Gold Strike Tunica e 3,609 179,146 — — 3,609 178,673 182,282 (83,720 ) 2016 f Borgata e 35,568 1,264,432 — — 35,568 1,256,189 1,291,757 (64,322 ) 2016 f MGM National Harbor — — 1,183,909 — — — 1,220,292 1,220,292 (36,383 ) 2017 f The Park e 33,026 101,353 — — 33,026 100,115 133,141 (8,977 ) 2016 f 4,143,513 8,444,331 — 125,398 4,143,513 8,511,846 12,655,359 (2,633,909 ) Corporate Property: MGP Corporate Office e — 488 — — — 488 488 — 2017 f $ 4,143,513 $ 8,444,819 $ — $ 125,398 $ 4,143,513 $ 8,512,334 $ 12,655,847 $ (2,633,909 ) (a) Represents the net carrying value of the IPO Properties on the IPO Date and the real estate assets of Borgata and MGM National Harbor on their respective acquisition dates by the Operating Partnership. (b) The aggregate cost of land, buildings and improvements for federal income tax purposes is approximately $8.7 billion. (c) All of the properties are large-scale destination entertainment and gaming-related properties, with the exception of The Park and MGP Corporate Office. See “Item 1 — Business — Our Properties” for additional detail about our properties. (d) We have omitted the date of construction of our properties on the basis that compiling this disclosure on a site-by-site basis would be impracticable because the majority of the real estate assets were constructed by other companies that were later acquired by MGM and then ultimately acquired by MGP on the IPO Date. (e) The assets comprising these Properties collectively secure the entire amount of the Operating Partnership's senior secured credit facility. (f) Depreciation is computed based on the following estimated useful lives: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Fixtures and integral equipment 3 to 20 years Reconciliation of Real Estate 2017 2016 Balance at beginning of year $ 11,468,170 $ 9,965,185 Additions (1) 1,273,288 1,511,390 Impairments — — Dispositions and write-offs (85,611 ) (8,405 ) Balance at end of year $ 12,655,847 $ 11,468,170 (1) Includes $1.2 billion resulting from the Operating Partnership's acquisition of MGM National Harbor from MGM. See “Note 3 — Acquisitions — MGM National Harbor Transaction for additional details.” Reconciliation of Accumulated Depreciation 2017 2016 Balance at beginning of year $ (2,388,492 ) $ (2,171,546 ) Depreciation expense (260,455 ) (220,667 ) Property transactions, net (34,022 ) — Dispositions and write-offs 85,443 3,721 MGM National Harbor Transaction (36,383 ) — Balance at end of year $ (2,633,909 ) $ (2,388,492 )

Basis of Presentation and Sum26

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation. The accompanying combined and consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) set forth in the Accounting Standards Codification (“ASC”), as published by the Financial Accounting Standards Board (“FASB”), and with the applicable rules and regulations of the Securities and Exchange Commission (“SEC”). For periods prior to the IPO Date, the accompanying combined and consolidated financial statements of MGP and the Operating Partnership represent the IPO Properties, which were controlled by MGM, and have been determined to be MGP’s and the Operating Partnership’s predecessor for accounting purposes (the “Predecessor”). The accompanying combined and consolidated financial statements include Predecessor financial statements that have been “carved out” of MGM’s consolidated financial statements and reflect significant assumptions and allocations. The financial statements do not fully reflect what the Predecessor’s results of operations, financial position and cash flows would have been if the Predecessor had been a stand-alone company during the periods presented. As a result, historical financial information is not necessarily indicative of the future results of operations, financial position and cash flows of MGP or the Operating Partnership. For periods subsequent to the IPO Date, the accompanying combined and consolidated financial statements of MGP and the Operating Partnership represent the results of operations, financial positions and cash flows of MGP and the Operating Partnership, including their respective subsidiaries. Certain reclassifications have been made to conform the prior period presentation. Property tax expense and property insurance expense were separately classified in prior periods and now are classified within “reimbursable expenses” in the accompanying combined and consolidated statements of operations.
Principles of consolidation	Principles of consolidation. The Company identifies entities for which control is achieved through means other than voting rights and to determine which business enterprise is the primary beneficiary of variable interest entities (“VIE”). A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affect the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. The combined and consolidated financial statements of MGP include the accounts of the Operating Partnership, a VIE of which the Company is the primary beneficiary, as well as its wholly owned and majority-owned subsidiaries. MGP’s maximum exposure to loss is the carrying value of the assets and liabilities of the Operating Partnership, which represents all of MGP’s assets and liabilities. As MGP holds what is deemed a majority voting interest in the Operating Partnership through its ownership of the Operating Partnership’s sole general partner, it qualifies for the exemption from providing certain of the required disclosures associated with investments in VIEs. The combined and consolidated financial statements of the Operating Partnership include the accounts of its wholly owned subsidiary, the Landlord, which owns the real estate, a VIE of which the Operating Partnership is the primary beneficiary. The Operating Partnership’s maximum exposure to loss is the carrying value of the assets and liabilities of the Landlord, which represent $10.1 billion of the Operating Partnership’s assets and $209.3 million of the Operating Partnership’s liabilities at December 31, 2017. For entities not determined to be VIEs, the Company consolidates such entities in which the Company owns 100% of the equity. For entities in which the Company owns less than 100% of the equity interest, the Company consolidates the entity if it has the direct or indirect ability to control the entities’ activities based upon the terms of the respective entities’ ownership agreements. All intercompany balances and transactions are eliminated in consolidation.
Noncontrolling interest	Noncontrolling interest. MGP presents noncontrolling interest and classifies such interest as a component of consolidated shareholders’ equity, separate from the Company’s Class A shareholders’ equity. Noncontrolling interest in MGP represents Operating Partnership units currently held by subsidiaries of MGM. Net income or loss of the Operating Partnership is allocated to its noncontrolling interest based on the noncontrolling interest’s ownership percentage in the Operating Partnership except for income tax expenses as discussed in Note 8. Ownership percentage is calculated by dividing the number of Operating Partnership units held by the noncontrolling interest by the total Operating Partnership units held by the noncontrolling interest and the Company. Issuance of additional Class A shares and Operating Partnership units changes the ownership interests of both the noncontrolling interest and the Company. Such transactions and the related proceeds are treated as capital transactions. MGM may tender its Operating Partnership units for redemption by the Operating Partnership in exchange for cash equal to the market price of MGP’s Class A shares at the time of redemption or for unregistered Class A shares on a one -for-one basis. Such selection to pay cash or issue Class A shares to satisfy an Operating Partnership unitholder’s redemption request is solely within the control of MGP’s independent conflicts committee.
Use of estimates	Use of estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The Company’s most significant assumptions and estimates relate to the useful lives of real estate assets, real estate impairment assessments, and valuation of derivative financial instruments. These estimates are based on historical experience and other assumptions which management believes are reasonable under the circumstances. Management evaluates its estimates on an ongoing basis and makes revisions to these estimates and related disclosures as experience develops or new information becomes known. Actual results could differ from these estimates.
Real estate investments	Real estate investments. Real estate investments consist of land, buildings, improvements and integral equipment. Because the Formation Transactions, the Borgata Transaction, and the MGM National Harbor Transaction (as defined in Note 3) represent transactions between entities under common control, such real estate was initially recorded by the Company at MGM’s historical cost basis, less accumulated depreciation (i.e., there was no change in the basis of the contributed assets), as of the IPO Date and the date of the consummation of the Borgata Transaction and the MGM National Harbor Transaction, respectively. Costs of maintenance and repairs to real estate investments are the responsibility of the Tenant under the Master Lease. Although the Tenant is responsible for all capital expenditures during the term of the Master Lease, if, in the future, MGM ceases to consolidate MGP, the Company may be required to pay the Tenant, should the Tenant so elect, for certain capital improvements that would not constitute “normal tenant improvements” in accordance with U.S. GAAP (“Non-Normal Tenant Improvements”), subject to an initial cap of $100 million in the first year of the Master Lease increasing annually by $75 million each year thereafter. The Company will be entitled to receive additional rent based on the 10 -year Treasury yield plus 600 basis points multiplied by the value of the new capital improvements the Company is required to pay for in connection with a deconsolidation event and such capital improvements will be subject to the terms of the Master Lease. Examples of Non-Normal Tenant Improvements include the costs of structural elements at The Mirage, Mandalay Bay, Luxor, New York-New York, Monte Carlo, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit, Beau Rivage, Borgata and National Harbor , including capital improvements that expand the footprint or square footage of any of the properties or extend the useful life of the properties, as well as equipment that would be a necessary improvement at any of the properties, including initial installation of elevators, air conditioning systems or electrical wiring. Such Non-Normal Tenant Improvements are capitalized and depreciated over the asset’s remaining life. Since the IPO Date, Non-Normal Tenant Improvements were $125.4 million through December 31, 2017 . In accordance with accounting standards governing the impairment or disposal of long-lived assets, the carrying value of long-lived assets, including land, buildings and improvements, land improvements and integral equipment is evaluated whenever events or changes in circumstances indicate that a potential impairment has occurred relative to a given asset or assets. Factors that could result in an impairment review include, but are not limited to, a current period cash flow loss combined with a history of cash flow losses, current cash flows that may be insufficient to recover the investment in the property over the remaining useful life, a projection that demonstrates continuing losses associated with the use of a long-lived asset, significant changes in the manner of use of the assets or significant changes in business strategies. If such circumstances arise, the Company uses an estimate of the undiscounted value of expected future operating cash flows to determine whether the long-lived assets are impaired. If the aggregate undiscounted cash flows plus net proceeds expected from disposition of the assets (if any) are less than the carrying amount of the assets, the resulting impairment charge to be recorded is calculated based on the excess of the carrying value of the assets over the fair value of such assets, with the fair value determined based on an estimate of discounted future cash flows, appraisals or other valuation techniques.
Cash and cash equivalents	Cash and cash equivalents. Cash and cash equivalents include investments and interest bearing instruments with maturities of 90 days or less at the date of acquisition. Such investments are carried at cost, which approximates market value.
Revenue recognition	Revenue recognition. Rental revenue under the Master Lease is recognized on a straight-line basis over the non-cancelable term and reasonably assured renewal periods, which includes the initial lease term of ten years and all four additional five -year terms under the Master Lease, for all contractual revenues that are determined to be fixed and measurable. The difference between such rental revenue earned and the cash rent due under the provisions of the Master Lease is recorded as deferred rent receivable and included as a component of tenant and other receivables, net or as deferred revenue if cash rent due exceeds rental revenue earned. Tenant reimbursement revenue arises from costs which the Company is the primary obligor that are required to be paid by the Tenant or reimbursed to the Company pursuant to the Master Lease. This revenue is recognized in the same periods as the expense is incurred.
Deferred revenue	Deferred revenue. The Company recognizes the cost basis of Non-Normal Tenant Improvements as real estate investments and deferred revenue. The Company depreciates the real estate investments over their estimated useful lives applying the straight-line method and deferred revenue is amortized applying the straight-line method as additional rental revenue over the remaining term of the Master Lease once the related real estate assets are placed in service.
Depreciation and property transactions	Depreciation and property transactions. Depreciation expense is recognized over the useful lives of real estate applying the straight-line method. Useful lives are periodically reviewed. Leased real estate and leasehold improvements are depreciated on a straight-line basis over the following estimated useful lives: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Fixtures and integral equipment 3 to 20 years Property transactions, net are comprised of transactions related to long-lived assets, such as normal losses on the disposition of assets.
Reimbursable expenses	Reimbursable expenses. Reimbursable expenses arise from costs which the Company is the primary obligor that are required to be reimbursed or paid directly by Tenant pursuant to the Master Lease including property taxes of the properties and ground lease rent. Reimbursable expenses also includes property insurance in the periods presented prior to the IPO Date.
Acquisition-related expenses	Acquisition-related expenses. The Company expenses transaction costs associated with acquisitions in the period in which they are incurred. These costs are included in acquisition-related expenses within the combined and consolidated statements of operations.
General and administrative	General and administrative. General and administrative expenses include the salaries and benefits of employees and external consulting costs. In addition, pursuant to a corporate services agreement entered into on the IPO Date between the Operating Partnership and MGM (the “Corporate Services Agreement”), MGM provides the Operating Partnership and its subsidiaries with financial, administrative and operational support services, including accounting and finance support, human resources support, legal and regulatory compliance support, insurance advisory services, internal audit services, governmental affairs monitoring and reporting services, information technology support, construction services and various other support services. MGM is reimbursed for all costs it incurs directly related to providing the services thereunder.
Net income per share and net income per unit	Net income per share. Basic net income per share includes the weighted average number of Class A shares outstanding during the period. Dilutive net income per share includes the weighted average number of Class A shares and the dilutive effect of share-based compensation awards outstanding during the period, when such awards are dilutive. Net income per unit. Basic net income per unit includes the weighted average number of Operating Partnership units outstanding during the period. Dilutive net income per unit includes the weighted average number of Operating Partnership units and the dilutive effect of share-based compensation awards outstanding during the period, when such awards are dilutive.
Deferred financing costs	Deferred financing costs. Deferred financing costs were incurred in connection with the issuance of the term loan facilities, revolving credit facility and senior notes. Costs incurred in connection with term loan facilities and senior notes are capitalized and offset against the carrying amount of the related indebtedness. Costs incurred in connection with the Operating Partnership’s entrance into the revolving credit facility are capitalized as a component of prepaid expenses and other assets. These costs are amortized over the term of the indebtedness and are included in interest expense in the combined and consolidated statement of operations.
Derivative financial instruments	Derivative financial instruments. The Company accounts for its derivatives in accordance with FASB ASC Topic 815, Derivatives and Hedging , in which all derivative instruments are reflected at fair value as either assets or liabilities. For derivative instruments that are designated and qualify as hedging instruments, the Company records the effective portion of the gain or loss on the hedge instruments as a component of accumulated other comprehensive income. Any ineffective portion of a derivative’s change in fair value is immediately recognized within net income.
Fair value measurements	Fair value measurements . Fair value measurements are utilized in accounting for testing of long-lived assets for impairment. Fair value of financial and nonfinancial assets and liabilities is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs used in the methodologies of measuring fair value for assets and liabilities, is as follows: Level 1—Observable inputs for identical instruments such as quoted market prices; Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.) and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and Level 3—Unobservable inputs that reflect the Company’s determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including management’s own data. The fair value of the Company’s cash and cash equivalents, accounts payable and accrued expenses approximate their carrying value because of the short-term nature of these instruments. The following table summarizes the fair value of the Company’s other financial instruments as of December 31, 2017: Total Level 1 Level 2 Level 3 (in thousands) Assets: Derivative asset - interest rate swaps $ 11,306 $ — $ 11,306 $ — Liabilities: Senior secured credit facility: Senior secured term loan A facility 273,750 — 273,750 — Senior secured term loan B facility 1,822,169 — 1,822,169 — Senior secured revolving credit facility — — — — $1,050 million 5.625% senior notes, due 2024 1,126,125 — 1,126,125 — $500 million 4.50% senior notes, due 2026 496,250 — 496,250 — $350 million 4.50% senior notes, due 2028 $ 345,188 $ 345,188 $ 4,063,482 $ — $ 4,063,482 $ — The total principal balance of our debt was $4.0 billion at December 31, 2017 , with a fair value of $4.1 billion and $3.7 billion at December 31, 2017 and December 31, 2016, respectively. The estimated fair value was estimated using quoted prices for identical or similar liabilities in markets that are not active for each of the Company’s term loan A facility, term loan B facility, revolving credit facility and senior notes. These fair value measurements are considered Level 2 of the fair value hierarchy. Derivative assets and liabilities are carried at fair value. The fair value of interest rate swaps is determined based on the present value of expected future cash flows using observable, quoted LIBOR swap rates for the full term of the swap. The Company has determined that the majority of the inputs used to value its derivative assets fall within Level 2 of the fair value hierarchy.
Income taxes	Income taxes. The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
Reportable segment	Reportable segment. The Company’s real estate properties are similar to one another in that they consist of large-scale destination entertainment and leisure resorts and related offerings, whose tenants generally offer casino gaming, hotel, convention, dining, entertainment and retail, are held by a subsidiary of the Operating Partnership, have similar economic characteristics and are governed under a single Master Lease. As such, the properties are reported as one reportable segment.
Concentrations of credit risk	Concentrations of credit risk. All of the Company’s real estate properties have been leased to a wholly owned subsidiary of MGM, and all of the Company’s revenues are derived from the Master Lease. MGM is a publicly traded company and is subject to the filing requirements of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), and is required to file periodic reports on Form 10-K and Form 10-Q with the SEC. Refer to www.edgar.gov for MGM’s publicly available financial information. Management does not believe there are any other significant concentrations of credit risk.
Geographical risk	Geographical risk. The majority of the Company’s real estate properties are located in Las Vegas, Nevada. Accordingly, future negative trends in local economic activity or natural disasters in this area might have a more significant effect on the Company than a more geographically diversified entity and could have an adverse impact on its financial condition and operating results.
Recently issued accounting standards	Recently issued accounting standards. In August 2017, the FASB issued Accounting Standards Update No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (“ASU 2017-12”). ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, and interim periods within those years. ASU 2017-12 amends the hedge accounting recognition and presentation requirements in order to improve the transparency and understandability of information about an entity’s risk management activities, and simplifies the application of hedge accounting. The Company is currently assessing the impact that adoption of this guidance will have on its consolidated financial statements and footnote disclosures. In January 2017, the FASB issues Accounting Standards Update No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 clarifies the definition of a business and with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. We have elected to early adopt ASU 2017-01 as of January 1, 2017. The adoption of ASU 2017-01 did not have a material impact on the Company's financial statements and footnote disclosures. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which replaces the existing guidance in FASB ASC Topic 840, Leases . ASU 2016-02 requires a dual approach for lessee accounting under which a lessee would account for leases as finance leases or operating leases. Both finance leases and operating leases will result in the lessee recognizing a right-of-use (“ROU”) asset and a corresponding lease liability. For finance leases the lessee would recognize interest expense and amortization of the ROU asset and for operating leases the lessee would recognize a straight-line total lease expense. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently in the process of determining the method of adoption and assessing the impact that adoption of this guidance will have on its financial statements and footnote disclosures. In May 2014, the FASB issued ASC 606, Revenue from Contracts with Customers (Topic 606) which outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. Under the standard, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration the entity expects to receive in exchange for those goods and services. The Company adopted ASC 606 on January 1, 2018 and it did not have a material impact on the Company’s financial statements and footnote disclosures.

Basis of Presentation and Sum27

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Estimated Useful Lives of Leased Real Estate and Leasehold Improvements	Leased real estate and leasehold improvements are depreciated on a straight-line basis over the following estimated useful lives: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Fixtures and integral equipment 3 to 20 years
Summary of the Fair Value of Other Financial Instruments	The following table summarizes the fair value of the Company’s other financial instruments as of December 31, 2017: Total Level 1 Level 2 Level 3 (in thousands) Assets: Derivative asset - interest rate swaps $ 11,306 $ — $ 11,306 $ — Liabilities: Senior secured credit facility: Senior secured term loan A facility 273,750 — 273,750 — Senior secured term loan B facility 1,822,169 — 1,822,169 — Senior secured revolving credit facility — — — — $1,050 million 5.625% senior notes, due 2024 1,126,125 — 1,126,125 — $500 million 4.50% senior notes, due 2026 496,250 — 496,250 — $350 million 4.50% senior notes, due 2028 $ 345,188 $ 345,188 $ 4,063,482 $ — $ 4,063,482 $ —

(Tables)

(Tables)	12 Months Ended
	Dec. 31, 2017
Real Estate [Abstract]
Carrying Value of Real Estate Investments	The carrying value of real estate investments is as follows: December 31, 2017 2016 (in thousands) Land $ 4,143,513 $ 4,143,513 Buildings, building improvements, land improvements and integral equipment 8,512,334 7,324,657 12,655,847 11,468,170 Less: Accumulated depreciation (2,633,909 ) (2,388,492 ) $ 10,021,938 $ 9,079,678

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
Future Noncancelable Minimum Rental Payments	Under the Master Lease, future non-cancelable minimum rental payments, which are the payments under the initial 10 -year term and does not include the four five -year renewal options, are as follows: Year ending December 31, (in thousands) 2018 $ 766,933 2019 780,782 2020 794,907 2021 809,315 2022 757,060 Thereafter 2,461,451 Total 6,370,448

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Schedule of Debt	Debt consists of the following: December 31, 2017 2016 (in thousands) Senior secured credit facility: Senior secured term loan A facility $ 273,750 $ 292,500 Senior secured term loan B facility 1,817,625 1,840,750 Senior secured revolving credit facility — — $1,050 million 5.625% senior notes, due 2024 1,050,000 1,050,000 $500 million 4.50% senior notes, due 2026 500,000 500,000 $350 million 4.50% senior notes, due 2028 350,000 — 3,991,375 3,683,250 Less: Unamortized discount and debt issuance costs (56,747 ) (61,308 ) $ 3,934,628 $ 3,621,942
Maturities of the Principal Amount of Debt	Maturities of the principal amount of the Company’s debt as of December 31, 2017 are as follows: Year ending December 31, (in thousands) 2018 $ 33,500 2019 33,500 2020 33,500 2021 247,250 2022 18,500 Thereafter 3,625,125 $ 3,991,375

Derivatives and Hedging Activ31

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value and Presentation of Derivatives	The following table summarizes the fair value and the presentation in the Company’s balance sheet: December 31, Location on Balance Sheet 2017 2016 (in thousands) Interest rate swaps - cash flow hedges Prepaid expenses and other assets $ 11,306 $ 1,879

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision for Income Taxes Attributable to Income (Loss) Before Income Taxes	The provision for income taxes attributable to income (loss) before income taxes is as follows: Year Ended December 31, 2017 2016 2015 (in thousands) Federal: Current $ — $ — $ — Deferred — — — Provision for federal income taxes $ — $ — $ — State: Current $ 1,729 $ 2,156 $ — Deferred 3,177 108 — Provision for state income taxes $ 4,906 $ 2,264 $ —
Reconciliation of Federal Income Tax Statutory Rate and Effective Tax Rate	A reconciliation of the federal income tax statutory rate and the Company’s effective tax rate is as follows: Year Ended December 31, 2017 2016 2015 Federal income tax statutory rate 35.0 % 35.0 % 35.0 % Federal valuation allowance — — (35.0 ) Income not subject to federal income tax (35.0 ) (35.0 ) — State taxes 2.9 6.0 — Effective tax rate 2.9 % 6.0 % — %
Major Tax-Effected Components of Net Deferred Tax Liability	The major tax-effected components of the Company’s net deferred tax liability are as follows: December 31, 2017 2016 (in thousands) Deferred tax liability – federal and state Real estate investments, net $ 28,544 $ 25,368 Total deferred tax liability $ 28,544 $ 25,368

Shareholders' Equity and Part33

Shareholders' Equity and Partners' Capital (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Distributions and Dividends Declared and Paid	The following table presents the distributions declared and paid by the Operating Partnership and the dividends declared and paid by MGP. MGP pays its dividends with the receipt of its share of the Operating Partnership's distributions. Declaration Date Record Date Distribution/ Dividend Per Unit/ Share Payment Date Operating Partnership Distribution Amount MGP Class A Dividend Amount (in thousands, except per unit and per share amount) 2017 March 15, 2017 March 31, 2017 $ 0.3875 April 13, 2017 $ 94,109 $ 22,281 June 15, 2017 June 30, 2017 $ 0.3950 July 14, 2017 $ 95,995 $ 22,777 September 15, 2017 September 29, 2017 $ 0.3950 October 13, 2017 $ 101,222 $ 28,004 December 15, 2017 December 29, 2017 $ 0.4200 January 16, 2018 $ 111,733 $ 29,777 2016 June 16, 2016 June 30, 2016 $ 0.2632 (1) July 15, 2016 $ 56,720 $ 15,134 September 15, 2016 September 30, 2016 $ 0.3875 October 14, 2016 $ 94,109 $ 22,281 December 15, 2016 December 30, 2016 $ 0.3875 January 16, 2017 $ 94,109 $ 22,281 (1) Amount is based on a distribution and dividend of $0.3575 per Operating Partnership unit and Class A share for a full quarter.

Accumulated Other Comprehensi34

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income	The following table summarizes the changes in accumulated other comprehensive income: Cash Flow Hedges (in thousands) Balance, December 31, 2015 $ — Other comprehensive income before reclassifications 1,521 Amounts reclassified from accumulated other comprehensive income to interest expense 358 Balance, December 31, 2016 1,879 Other comprehensive income before reclassifications 566 Amounts reclassified from accumulated other comprehensive income to interest expense 9,216 Net current period other comprehensive income 9,782 Balance, December 31, 2017 11,661 Other comprehensive loss attributable to noncontrolling interest (8,553 ) Accumulated other comprehensive income attributable to Class A shareholders $ 3,108

Net Income Per Class A Share (T

Net Income Per Class A Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Class A Share	The table below provides net income and the number of Class A shares used in the computations of “basic” net income per share, which utilizes the weighted-average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” net income per share, which includes all such shares. Net income attributable to Class A shares, weighted average Class A shares outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Net income per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Basic net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Basic net income per Class A share $ 0.68 $ 0.52 Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Diluted net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 183,410 249,331 Weighted average shares for diluted net income per Class A share 61,916,546 57,751,489 Diluted net income per Class A share (3) $ 0.67 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive. (3) Diluted net income per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. The table below provides net income and the number of Operating Partnership units used in the computations of “basic” net income per Operating Partnership unit, which utilizes the weighted-average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” net income per Operating Partnership units, which includes all such Operating Partnership units. Net income attributable to Operating Partnership units, weighted average Operating Partnership units outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Basic net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Basic net income per Operating Partnership unit $ 0.67 $ 0.52 Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Diluted net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Effect of dilutive units for diluted net income per Operating Partnership unit (2) 183,410 249,331 Weighted average units for diluted net income per Operating Partnership unit 249,634,668 232,430,401 Diluted net income per Operating Partnership unit $ 0.66 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive.

Net Income Per Operating Part36

Net Income Per Operating Partnership Unit (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Basic and Diluted Net Income Per Operating Partnership Unit	The table below provides net income and the number of Class A shares used in the computations of “basic” net income per share, which utilizes the weighted-average number of Class A shares outstanding without regard to dilutive potential Class A shares, and “diluted” net income per share, which includes all such shares. Net income attributable to Class A shares, weighted average Class A shares outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Net income per share has not been presented for the Class B shareholder as the Class B share is not entitled to any economic rights in the Company. Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Basic net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Basic net income per Class A share $ 0.68 $ 0.52 Year Ended December 31, 2017 April 25 - December 31, 2016 (in thousands, except share Diluted net income per Class A share Numerator: Net income attributable to Class A shares $ 41,775 $ 29,938 Denominator: Basic weighted average Class A shares outstanding (1) 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 183,410 249,331 Weighted average shares for diluted net income per Class A share 61,916,546 57,751,489 Diluted net income per Class A share (3) $ 0.67 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the board of directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive. (3) Diluted net income per Class A share does not assume conversion of the Operating Partnership units held by MGM as such conversion would be antidilutive. The table below provides net income and the number of Operating Partnership units used in the computations of “basic” net income per Operating Partnership unit, which utilizes the weighted-average number of Operating Partnership units outstanding without regard to dilutive potential Operating Partnership units, and “diluted” net income per Operating Partnership units, which includes all such Operating Partnership units. Net income attributable to Operating Partnership units, weighted average Operating Partnership units outstanding and the effect of dilutive securities outstanding are presented for the period subsequent to the IPO Date. Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Basic net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Basic net income per Operating Partnership unit $ 0.67 $ 0.52 Year Ended December 31, 2017 April 25 – December 31, 2016 (in thousands, except unit Diluted net income per Operating Partnership unit Numerator: Net income $ 165,990 $ 119,729 Denominator: Basic weighted average Operating Partnership units outstanding (1) 249,451,258 232,181,070 Effect of dilutive units for diluted net income per Operating Partnership unit (2) 183,410 249,331 Weighted average units for diluted net income per Operating Partnership unit 249,634,668 232,430,401 Diluted net income per Operating Partnership unit $ 0.66 $ 0.52 (1) Includes weighted average deferred share units granted to certain members of the Board of Directors. (2) No shares related to outstanding share-based compensation awards were excluded due to being antidilutive.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Noncancelable Minimum Lease Payments Pursuant to Ground Leases	Non-cancelable minimum lease payments pursuant to the ground leases through 2070 for the Borgata Transaction and through 2082 for the MGM National Harbor Transaction are as follows: Year ending December 31, (in thousands) 2018 $ 16,203 2019 17,585 2020 19,145 2021 23,024 2022 23,024 Thereafter 1,303,098 $ 1,402,079

Consolidating Financial Infor38

Consolidating Financial Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Consolidating Balance Sheet Information	CONSOLIDATING BALANCE SHEET INFORMATION December 31, 2017 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Real estate investments, net $ 488 $ — $ 10,021,450 $ — $ 10,021,938 Cash and cash equivalents 259,722 — — — 259,722 Tenant and other receivables, net 299 — 6,086 — 6,385 Intercompany 1,383,397 — — (1,383,397 ) — Prepaid expenses and other assets 18,487 — — — 18,487 Investments in subsidiaries 8,479,388 — — (8,479,388 ) — Above market lease, asset — — 44,588 — 44,588 $ 10,141,781 $ — $ 10,072,124 $ (9,862,785 ) $ 10,351,120 Debt, net 3,934,628 — — — 3,934,628 Due to MGM Resorts International and affiliates 962 — — — 962 Intercompany — — 1,383,397 (1,383,397 ) — Accounts payable, accrued expenses, and other liabilities 4,154 — 6,086 — 10,240 Above market lease, liability — — 47,069 — 47,069 Accrued interest 22,565 — — — 22,565 Distribution payable 111,733 — — — 111,733 Deferred revenue — — 127,640 — 127,640 Deferred income taxes, net — — 28,544 — 28,544 Total liabilities 4,074,042 — 1,592,736 (1,383,397 ) 4,283,381 General partner — — — — — Limited partners 6,067,739 — 8,479,388 (8,479,388 ) 6,067,739 Total partners' capital 6,067,739 — 8,479,388 (8,479,388 ) 6,067,739 Total liabilities and partners' capital $ 10,141,781 $ — $ 10,072,124 $ (9,862,785 ) $ 10,351,120 CONSOLIDATING BALANCE SHEET INFORMATION December 31, 2016 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Real estate investments, net $ — $ — $ 9,079,678 $ — $ 9,079,678 Cash and cash equivalents 360,492 — — — 360,492 Tenant and other receivables, net 2,059 — 7,444 — 9,503 Intercompany 880,823 — — (880,823 ) — Prepaid expenses and other assets 9,167 — 1,739 — 10,906 Investments in subsidiaries 8,100,942 — — (8,100,942 ) — Above market lease, asset — — 46,161 — 46,161 $ 9,353,483 $ — $ 9,135,022 $ (8,981,765 ) $ 9,506,740 Debt, net 3,621,942 — — — 3,621,942 Due to MGM Resorts International and affiliates — — 166 — 166 Intercompany — — 880,823 (880,823 ) — Accounts payable, accrued expenses, and other liabilities 3,034 — 7,444 — 10,478 Above market lease, liability — — 47,957 — 47,957 Accrued interest 26,137 — — — 26,137 Distribution payable 94,109 — — — 94,109 Deferred revenue — — 72,322 — 72,322 Deferred income taxes, net — — 25,368 — 25,368 Total liabilities 3,745,222 — 1,034,080 (880,823 ) 3,898,479 General partner — — — — — Limited partners 5,608,261 — 8,100,942 (8,100,942 ) 5,608,261 Total partners' capital 5,608,261 — 8,100,942 (8,100,942 ) 5,608,261 Total liabilities and partners' capital $ 9,353,483 $ — $ 9,135,022 $ (8,981,765 ) $ 9,506,740
Consolidating Statement of Operations and Comprehensive Income Information	CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION Year Ended December 31, 2017 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Revenues Rental revenue $ — $ — $ 675,089 $ — $ 675,089 Tenant reimbursements and other — — 90,606 — 90,606 — — 765,695 — 765,695 Expenses Depreciation — — 260,455 — 260,455 Property transactions, net — — 34,022 — 34,022 Reimbursable expenses — — 88,254 — 88,254 Amortization of above market lease, net — — 686 — 686 Acquisition-related expenses 17,304 — — — 17,304 General and administrative 12,189 — — — 12,189 29,493 — 383,417 — 412,910 Operating income (loss) (29,493 ) — 382,278 — 352,785 Equity in earnings of subsidiaries 377,372 — — (377,372 ) — Non-operating income (expense) Interest income 3,907 — — — 3,907 Interest expense (184,175 ) — — — (184,175 ) Other non-operating (1,621 ) — — — (1,621 ) (181,889 ) — — — (181,889 ) Income (loss) before income taxes 165,990 — 382,278 (377,372 ) 170,896 Provision for income taxes — — (4,906 ) — (4,906 ) Net income (loss) $ 165,990 $ — $ 377,372 $ (377,372 ) $ 165,990 Other comprehensive income (loss) Net income (loss) 165,990 — 377,372 (377,372 ) 165,990 Unrealized gain on cash flow hedges 9,782 — — — 9,782 Comprehensive income (loss) $ 175,772 $ — $ 377,372 $ (377,372 ) $ 175,772 CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION Year Ended December 31, 2016 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Revenues Rental revenue $ — $ — $ 419,239 $ — $ 419,239 Tenant reimbursements and other — — 48,309 — 48,309 — — 467,548 — 467,548 Expenses Depreciation — — 220,667 — 220,667 Property transactions, net — — 4,684 — 4,684 Reimbursable expenses — — 68,063 — 68,063 Amortization of above market lease, net — — 286 — 286 Acquisition-related expenses 10,178 — — — 10,178 General and administrative 9,896 — — — 9,896 20,074 — 293,700 — 313,774 Operating income (loss) (20,074 ) — 173,848 — 153,774 Equity in earnings of subsidiaries 171,584 — — (171,584 ) — Non-operating income (expense) Interest income 774 — — — 774 Interest expense (116,212 ) — — — (116,212 ) Other non-operating (726 ) — — — (726 ) (116,164 ) — — — (116,164 ) Income (loss) before income taxes 35,346 — 173,848 (171,584 ) 37,610 Provision for income taxes — — (2,264 ) — (2,264 ) Net income (loss) $ 35,346 $ — $ 171,584 $ (171,584 ) $ 35,346 Other comprehensive income (loss) Net income (loss) 35,346 — 171,584 (171,584 ) 35,346 Unrealized gain on cash flow hedges 1,879 — — — 1,879 Comprehensive income (loss) $ 37,225 $ — $ 171,584 $ (171,584 ) $ 37,225
Consolidating Statement of Cash Flows Information	CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION Year Ended December 31, 2017 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Cash flows from operating activities Net cash provided by (used in) operating activities $ (198,925 ) $ — $ 681,503 $ — $ 482,578 Cash flows from investing activities Capital expenditures for property and equipment funded by Parent (488 ) — — — (488 ) MGM National Harbor transaction (462,500 ) — — — (462,500 ) Net cash used in investing activities (462,988 ) — — — (462,988 ) Cash flows from financing activities Proceeds from issuance of debt 350,000 — — — 350,000 Deferred financing costs (5,598 ) — — — (5,598 ) Repayment of assumed debt (425,000 ) — — — (425,000 ) Repayment of debt principal (41,875 ) — — — (41,875 ) Proceeds from purchase of Operating Partnership units by MGP 387,548 — — — 387,548 Distributions paid (385,435 ) — — — (385,435 ) Cash received by Parent on behalf of Guarantor Subsidiaries 681,503 — (681,503 ) — — Net cash provided by financing activities 561,143 — (681,503 ) — (120,360 ) Cash and cash equivalents Net decrease for the period (100,770 ) — — — (100,770 ) Balance, beginning of period 360,492 — — — 360,492 Balance, end of period $ 259,722 $ — $ — $ — $ 259,722 CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION Year Ended December 31, 2016 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Cash flows from operating activities Net cash provided by (used in) operating activities $ (99,884 ) $ — $ 397,665 $ — $ 297,781 Cash flows from investing activities Capital expenditures for property and equipment funded by Parent — — (138,987 ) — (138,987 ) Net cash used in investing activities — — (138,987 ) — (138,987 ) Cash flows from financing activities Proceeds from issuance of debt 3,700,000 — — — 3,700,000 Deferred financing costs (77,163 ) — — — (77,163 ) Repayment of bridge facilities (4,544,850 ) — — — (4,544,850 ) Repayment of debt principal (16,750 ) — — — (16,750 ) Proceeds from purchase of Operating Partnership units by MGP 1,132,468 — — — 1,132,468 Distributions paid (150,829 ) — — — (150,829 ) Cash received by Parent on behalf of Guarantor Subsidiaries 417,500 — (417,500 ) — — Net cash transfers from Parent — — 158,822 — 158,822 Net cash provided by financing activities 460,376 — (258,678 ) — 201,698 Cash and cash equivalents Net increase for the period 360,492 — — — 360,492 Balance, beginning of period — — — — — Balance, end of period $ 360,492 $ — $ — $ — $ 360,492

MGP Selected Quarterly Financ39

MGP Selected Quarterly Financial Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarter First Second Third Fourth Total (in thousands, except per share data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income attributable to Class A shareholders 11,348 10,680 11,025 8,722 41,775 Net income per Class A share (basic) $ 0.20 $ 0.19 $ 0.18 $ 0.12 $ 0.68 Net income per Class A share (diluted) $ 0.20 $ 0.18 $ 0.18 $ 0.12 $ 0.67 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income attributable to Class A shareholders — 6,953 10,591 12,394 29,938 Net income per Class A share (basic) N/A $ 0.12 $ 0.18 $ 0.22 $ 0.52 Net income per Class A share (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Quarter First Second Third Fourth Total (in thousands, except per unit data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income per Operating Partnership unit (basic) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.67 Net income per Operating Partnership unit (diluted) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.66 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income per Operating Partnership unit (basic) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Net income per Operating Partnership unit (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52

Operating Partnership Selecte40

Operating Partnership Selected Quarterly Financial Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarter First Second Third Fourth Total (in thousands, except per share data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income attributable to Class A shareholders 11,348 10,680 11,025 8,722 41,775 Net income per Class A share (basic) $ 0.20 $ 0.19 $ 0.18 $ 0.12 $ 0.68 Net income per Class A share (diluted) $ 0.20 $ 0.18 $ 0.18 $ 0.12 $ 0.67 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income attributable to Class A shareholders — 6,953 10,591 12,394 29,938 Net income per Class A share (basic) N/A $ 0.12 $ 0.18 $ 0.22 $ 0.52 Net income per Class A share (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Quarter First Second Third Fourth Total (in thousands, except per unit data) 2017 Revenues $ 183,899 $ 184,456 $ 182,798 $ 214,542 $ 765,695 Operating income 92,022 90,167 89,378 81,218 352,785 Net income 46,692 43,875 43,700 31,723 165,990 Net income per Operating Partnership unit (basic) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.67 Net income per Operating Partnership unit (diluted) $ 0.19 $ 0.18 $ 0.18 $ 0.12 $ 0.66 2016 Revenues $ — $ 110,903 $ 172,499 $ 184,146 $ 467,548 Operating income (loss) (67,970 ) 39,193 86,792 95,759 153,774 Net income (loss) (67,970 ) 9,646 42,671 50,999 35,346 Net income per Operating Partnership unit (basic) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52 Net income per Operating Partnership unit (diluted) N/A $ 0.12 $ 0.18 $ 0.21 $ 0.52

Business (Detail)

Business (Detail) $ / shares in Units, $ in Thousands	Sep. 11, 2017	Apr. 25, 2016$ / sharesshares	Apr. 24, 2016USD ($)	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares
Business And Organization [Line Items]
Ownership interest transferred				100.00%
Assumption of bridge facilities from MGM | $					$ 4,000,000
Ownership percentage acquired				26.60%
Operating Partnership Units to MGP's Class A Shares
Business And Organization [Line Items]
Operating Partnership unit conversion ratio (in units)				1
MGM
Business And Organization [Line Items]
Ownership interest in operating partnership		73.30%
Operating Partnership units held (in units)				195,134,123
Increase in ownership interest in operating partnership	72.30%			73.40%
IPO
Business And Organization [Line Items]
Shares issued under initial public offering (in shares)		57,500,000
Initial offering price per share (in dollars per share) | $ / shares		$ 21
Ownership percentage acquired		26.70%
Over-Allotment Option
Business And Organization [Line Items]
Shares issued under initial public offering (in shares)		7,500,000
MGP Operating Partnership
Business And Organization [Line Items]
Assumption of bridge facilities from MGM | $			$ 4,000,000	$ 4,000,000
Operating partnership units outstanding (in units)				266,030,918	242,862,136

Basis of Presentation and Sum42

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Detail)	8 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2017USD ($)segmentterm	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Summary Of Significant Accounting Policies [Line Items]
Treasury yield term		10 years
Interest rate basis spread		6.00%
Non-normal tenant improvements		$ 125,400,000
Impairment charges		$ 0	$ 0	$ 0
Number of lease extension options | term		4
Additional extension period under Master Lease		5 years
Amortization of deferred financing costs		$ 11,400,000	7,200,000
Total principal balance of debt	$ 3,683,250,000	3,991,375,000	3,683,250,000
Fair value of debt	3,700,000,000	$ 4,063,482,000	$ 3,700,000,000
Number of reportable segments | segment		1
Corporate Services Agreement
Summary Of Significant Accounting Policies [Line Items]
Expenses incurred	$ 900,000	$ 1,600,000
Tenant
Summary Of Significant Accounting Policies [Line Items]
Initial cap of non-normal tenant improvements in the first year		100,000,000
Annual increase in non-normal tenant improvements		$ 75,000,000
Initial lease term of Master Lease		10 years
Operating Partnership Units to MGP's Class A Shares
Summary Of Significant Accounting Policies [Line Items]
Operating Partnership unit conversion ratio (in units)		1
MGP Operating Partnership | Landlord
Summary Of Significant Accounting Policies [Line Items]
Maximum exposure to loss, assets		$ 10,100,000,000
Maximum exposure to loss, liabilities		$ 209,300,000

Basis of Presentation and Sum43

Basis of Presentation and Summary of Significant Accounting Policies - Estimated Useful Lives of Leased Real Estate and Leasehold Improvements (Detail)	12 Months Ended
	Dec. 31, 2017
Buildings and building improvements | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	20 years
Buildings and building improvements | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	40 years
Land improvements | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	10 years
Land improvements | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	20 years
Fixtures and integral equipment | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	3 years
Fixtures and integral equipment | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	20 years

Basis of Presentation and Sum44

Basis of Presentation and Summary of Significant Accounting Policies - Summary of the Fair Value of Other Financial Instruments (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Assets:
Derivative asset - interest rate swaps	$ 11,306,000
Liabilities:
Total fair value of debt	4,063,482,000	$ 3,700,000,000
Level 1
Assets:
Derivative asset - interest rate swaps	0
Liabilities:
Total fair value of debt	0
Level 2
Assets:
Derivative asset - interest rate swaps	11,306,000
Liabilities:
Total fair value of debt	4,063,482,000
Level 3
Assets:
Derivative asset - interest rate swaps	0
Liabilities:
Total fair value of debt	0
Senior secured term loan A facility | Senior secured term loan
Liabilities:
Fair value of senior secured credit facility	273,750,000
Senior secured term loan A facility | Senior secured term loan | Level 1
Liabilities:
Fair value of senior secured credit facility	0
Senior secured term loan A facility | Senior secured term loan | Level 2
Liabilities:
Fair value of senior secured credit facility	273,750,000
Senior secured term loan A facility | Senior secured term loan | Level 3
Liabilities:
Fair value of senior secured credit facility	0
Senior secured term loan B facility | Senior secured term loan
Liabilities:
Fair value of senior secured credit facility	1,822,169,000
Senior secured term loan B facility | Senior secured term loan | Level 1
Liabilities:
Fair value of senior secured credit facility	0
Senior secured term loan B facility | Senior secured term loan | Level 2
Liabilities:
Fair value of senior secured credit facility	1,822,169,000
Senior secured term loan B facility | Senior secured term loan | Level 3
Liabilities:
Fair value of senior secured credit facility	0
Senior secured revolving credit facility | Revolving credit facility
Liabilities:
Fair value of senior secured credit facility	0
Senior secured revolving credit facility | Revolving credit facility | Level 1
Liabilities:
Fair value of senior secured credit facility	0
Senior secured revolving credit facility | Revolving credit facility | Level 2
Liabilities:
Fair value of senior secured credit facility	0
Senior secured revolving credit facility | Revolving credit facility | Level 3
Liabilities:
Fair value of senior secured credit facility	0
$1,050 million 5.625% senior notes, due 2024 | Senior Notes
Liabilities:
Fair value of senior notes	1,126,125,000
Principal amount	$ 1,050,000,000
Interest rate	5.625%
$1,050 million 5.625% senior notes, due 2024 | Senior Notes | Level 1
Liabilities:
Fair value of senior notes	$ 0
$1,050 million 5.625% senior notes, due 2024 | Senior Notes | Level 2
Liabilities:
Fair value of senior notes	1,126,125,000
$1,050 million 5.625% senior notes, due 2024 | Senior Notes | Level 3
Liabilities:
Fair value of senior notes	0
$500 million 4.50% senior notes, due 2026 | Senior Notes
Liabilities:
Fair value of senior notes	496,250,000
Principal amount	$ 500,000,000
Interest rate	4.50%
$500 million 4.50% senior notes, due 2026 | Senior Notes | Level 1
Liabilities:
Fair value of senior notes	$ 0
$500 million 4.50% senior notes, due 2026 | Senior Notes | Level 2
Liabilities:
Fair value of senior notes	496,250,000
$500 million 4.50% senior notes, due 2026 | Senior Notes | Level 3
Liabilities:
Fair value of senior notes	0
$350 million 4.50% senior notes, due 2028 | Senior Notes
Liabilities:
Fair value of senior notes	345,188,000
Principal amount	$ 350,000
Interest rate	4.50%
$350 million 4.50% senior notes, due 2028 | Senior Notes | Level 2
Liabilities:
Fair value of senior notes	$ 345,188,000

Acquisitions (Detail)

Acquisitions (Detail) $ in Thousands, shares in Millions	Oct. 05, 2017USD ($)ashares	Apr. 01, 2017USD ($)	Aug. 01, 2016USD ($)ashares	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Indebtedness assumed in acquisition			$ 545,000
Cash consideration				$ 462,500	$ 0	$ 0
Rent payments due under Master Lease	$ 756,700
Deferred tax liability				28,544	$ 25,368
Master Lease - Base Rent
Business Acquisition [Line Items]
Rent payments due under Master Lease			585,000	682,200
MGM National Harbor | Master Lease - Rent Increase
Business Acquisition [Line Items]
Rental revenues under Master Lease	95,000
Rent payments due under Master Lease	682,200
MGM National Harbor | Master Lease - Base Rent Increase
Business Acquisition [Line Items]
Rental revenues under Master Lease	85,500
MGM National Harbor | Master Lease - Percentage Rent Increase
Business Acquisition [Line Items]
Rental revenues under Master Lease	9,500
MGM National Harbor | Master Lease - Percentage Rent
Business Acquisition [Line Items]
Rent payments due under Master Lease	74,500
Borgata | Master Lease - Rent Increase
Business Acquisition [Line Items]
Rental revenues under Master Lease		$ 596,700	100,000
Borgata | Master Lease - Base Rent Increase
Business Acquisition [Line Items]
Rental revenues under Master Lease			90,000
Borgata | Master Lease - Percentage Rent Increase
Business Acquisition [Line Items]
Rental revenues under Master Lease			10,000
Borgata | Master Lease - Percentage Rent
Business Acquisition [Line Items]
Rent payments due under Master Lease			$ 65,000
MGM National Harbor Transaction
Business Acquisition [Line Items]
Indebtedness assumed in acquisition	425,000			$ 425,000
Cash consideration	$ 462,500
Operating Partnership units issued (in units) | shares	9.8
Carryover value	$ 1,180,000
Area of land leased | a	23
Borgata Transaction
Business Acquisition [Line Items]
Operating Partnership units issued (in units) | shares			27.4
Carryover value			$ 1,300,000
Area of land leased | a			11
Deferred tax liability			$ 25,300

Real Estate Investments (Detail

Real Estate Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Real Estate Properties [Line Items]
Real estate investments, gross	$ 12,655,847	$ 11,468,170
Less: Accumulated depreciation	(2,633,909)	(2,388,492)
Real estate investments, net	10,021,938	9,079,678
Land
Real Estate Properties [Line Items]
Real estate investments, gross	4,143,513	4,143,513
Buildings, building improvements, land improvements and integral equipment
Real Estate Properties [Line Items]
Real estate investments, gross	$ 8,512,334	$ 7,324,657

Leases - Narrative (Detail)

Leases - Narrative (Detail) $ in Thousands	Oct. 05, 2017USD ($)	Apr. 01, 2017USD ($)	Aug. 01, 2016USD ($)	Dec. 31, 2017USD ($)termperiod	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Leases [Line Items]
Number of lease extension options | term				4
Additional extension period under Master Lease				5 years
Rent payments due under Master Lease	$ 756,700
Adjusted net revenue to rent ratio				625.00%
Number of years that the percentage rent is fixed				6 years
Number of years that percentage rent is variable				5 years
Number of periods for calculation of variable rent | period				5
Straight line rental revenues under Master Lease				$ 675,089	$ 419,239	$ 0
Revenue related to tenant reimbursements				$ 90,606	48,309	$ 0
Master Lease
Leases [Line Items]
Initial lease term of Master Lease	10 years			10 years
Additional extension period under Master Lease				5 years
Straight line rental revenues under Master Lease				$ 675,100	$ 419,200
Base Rent
Leases [Line Items]
Rent payments due under Master Lease			$ 585,000	$ 682,200
Percentage of initial total rent payments due under the Master Lease				90.00%
Annual rent escalator percentage				2.00%
Percentage Rent
Leases [Line Items]
Percentage of initial total rent payments due under the Master Lease				10.00%
Lease fixed amount adjustment multiplier				1.40%
Borgata | Master Lease
Leases [Line Items]
Rental revenues under Master Lease		$ 661,700	550,000
Borgata | Percentage Rent
Leases [Line Items]
Rent payments due under Master Lease			65,000
Borgata | Rent Increase
Leases [Line Items]
Rental revenues under Master Lease		$ 596,700	100,000
Borgata | Base Rent Increase
Leases [Line Items]
Rental revenues under Master Lease			90,000
Borgata | Percentage Rent Increase
Leases [Line Items]
Rental revenues under Master Lease			$ 10,000
MGM National Harbor | Percentage Rent
Leases [Line Items]
Rent payments due under Master Lease	$ 74,500
MGM National Harbor | Rent Increase
Leases [Line Items]
Rent payments due under Master Lease	682,200
Rental revenues under Master Lease	95,000
MGM National Harbor | Base Rent Increase
Leases [Line Items]
Rental revenues under Master Lease	85,500
MGM National Harbor | Percentage Rent Increase
Leases [Line Items]
Rental revenues under Master Lease	$ 9,500

Leases - Future Noncancelable M

Leases - Future Noncancelable Minimum Rental Payments (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Leases [Abstract]
2,018	$ 766,933
2,019	780,782
2,020	794,907
2,021	809,315
2,022	757,060
Thereafter	2,461,451
Total	$ 6,370,448

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt, gross	$ 3,991,375,000	$ 3,683,250,000
Less: Unamortized discount and debt issuance costs	(56,747,000)	(61,308,000)
Long-term debt	3,934,628,000	3,621,942,000
Senior secured term loan A facility
Debt Instrument [Line Items]
Senior secured term loan	273,750,000	292,500,000
Senior secured term loan B facility
Debt Instrument [Line Items]
Senior secured term loan	1,817,625,000	1,840,750,000
Senior secured revolving credit facility
Debt Instrument [Line Items]
Long-term debt	0	0
$1,050 million 5.625% senior notes, due 2024
Debt Instrument [Line Items]
Senior notes	1,050,000,000	1,050,000,000
$500 million 4.50% senior notes, due 2026
Debt Instrument [Line Items]
Senior notes	500,000,000	500,000,000
$350 million 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Senior notes	350,000,000	$ 0
Senior Notes | $1,050 million 5.625% senior notes, due 2024
Debt Instrument [Line Items]
Principal amount	$ 1,050,000,000
Interest rate	5.625%
Senior Notes | $500 million 4.50% senior notes, due 2026
Debt Instrument [Line Items]
Principal amount	$ 500,000,000
Interest rate	4.50%
Senior Notes | $350 million 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Principal amount	$ 350,000
Interest rate	4.50%

Debt - Operating Partnership Br

Debt - Operating Partnership Bridge Facilities (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Oct. 05, 2017	Aug. 01, 2016
Debt Instrument [Line Items]
Indebtedness assumed in acquisition			$ 545,000,000
MGM National Harbor Transaction
Debt Instrument [Line Items]
Indebtedness assumed in acquisition	$ 425,000,000	$ 425,000,000
Predecessor Net Parent Investment
Debt Instrument [Line Items]
Assumption of bridge facilities from MGM	4,000,000,000
Predecessor Net Parent Investment | Borgata Transaction
Debt Instrument [Line Items]
Assumption of bridge facilities from MGM	$ 545,000,000

Debt - Operating Partnership Cr

Debt - Operating Partnership Credit Agreement (Detail) - USD ($)	May 01, 2017	Oct. 26, 2016	Apr. 25, 2016	Feb. 28, 2017	Dec. 31, 2017
Operating Partnership Credit Agreement
Debt Instrument [Line Items]
Senior secured net debt to adjusted total assets ratio					40.00%
Total net debt to adjusted total assets ratio					65.00%
Interest coverage ratio					200.00%
Operating Partnership Credit Agreement | Senior secured term loan A facility
Debt Instrument [Line Items]
Term loan repayment percentage of initial aggregate principal amount			5.00%
Interest rate					4.32%
Operating Partnership Credit Agreement | Senior secured term loan B facility
Debt Instrument [Line Items]
Percentage of credit facility issued to lenders			99.75%
Term loan repayment percentage of initial aggregate principal amount			1.00%
LIBOR floor rate			0.75%	0.75%
Interest rate					3.82%
Operating Partnership Credit Agreement | Senior secured term loan B facility | LIBOR
Debt Instrument [Line Items]
Variable margin			3.25%	2.50%
Revolving credit facility | Operating Partnership Credit Agreement | Senior secured term loan A facility | LIBOR
Debt Instrument [Line Items]
Variable margin during initial period			2.75%
Revolving credit facility | Operating Partnership Credit Agreement | Senior secured term loan A facility | LIBOR | Minimum
Debt Instrument [Line Items]
Variable margin during initial period			2.25%
Revolving credit facility | Operating Partnership Credit Agreement | Senior secured term loan A facility | LIBOR | Maximum
Debt Instrument [Line Items]
Variable margin during initial period			2.75%
Revolving credit facility | Operating Partnership Credit Agreement | Senior secured term loan B facility | LIBOR | Minimum
Debt Instrument [Line Items]
Variable margin during initial period	2.25%	2.75%
LIBOR floor rate	0.00%
Revolving credit facility | Operating Partnership Credit Agreement | Senior secured term loan B facility | LIBOR | Maximum
Debt Instrument [Line Items]
Variable margin during initial period		0.75%
Revolving credit facility | Operating Partnership Credit Agreement | Senior secured revolving credit facility
Debt Instrument [Line Items]
Credit facility amount			$ 600,000,000
Amount drawn under credit facility					$ 0
Line of Credit | Senior secured term loan A facility
Debt Instrument [Line Items]
Principal amount			300,000,000
Line of Credit | Senior secured term loan B facility
Debt Instrument [Line Items]
Principal amount			$ 1,850,000,000

Debt - Operating Partnership Se

Debt - Operating Partnership Senior Notes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Sep. 07, 2017	Dec. 31, 2016	Aug. 12, 2016	Apr. 20, 2016
$1,050 million 5.625% senior notes, due 2024
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,050,000		$ 1,050,000
$500 million 4.50% senior notes, due 2026
Debt Instrument [Line Items]
Aggregate principal amount	500,000		500,000
$350 million 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Aggregate principal amount	$ 350,000		$ 0
MGP Operating Partnership | $350 million 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Aggregate principal amount		$ 350,000
Interest rate		4.50%
Operating Partnership Senior Notes | $1,050 million 5.625% senior notes, due 2024
Debt Instrument [Line Items]
Aggregate principal amount					$ 1,050,000
Interest rate					5.625%
Debt instrument redemption price percentage	100.00%
Operating Partnership Senior Notes | $500 million 4.50% senior notes, due 2026
Debt Instrument [Line Items]
Aggregate principal amount				$ 500,000
Interest rate				4.50%

Debt - Maturities of the Princi

Debt - Maturities of the Principal Amount of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
2,018	$ 33,500
2,019	33,500
2,020	33,500
2,021	247,250
2,022	18,500
Thereafter	3,625,125
Total	$ 3,991,375	$ 3,683,250

Derivatives and Hedging Activ54

Derivatives and Hedging Activities - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	May 31, 2017
Derivative [Line Items]
Gain on derivative instrument	$ 9,782,000	$ 1,879,000	$ 0
Ineffective portion of the change in fair value derivatives	0
Interest expense	184,175,000	116,212,000	$ 0
Interest Rate Swaps
Derivative [Line Items]
Average fixed interest rate				1.844%
Notional amount				$ 1,200,000,000
Interest expense	$ 9,200,000	$ 400,000
Interest Rate Swaps | Designated as Hedging Instrument
Derivative [Line Items]
Average fixed interest rate		1.825%
Notional amount		$ 500,000,000

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Minimum percentage of taxable income distributed to shareholders	90.00%
Expected distribution percentage of REIT taxable income in the current taxable year	100.00%
Tax Cuts and Jobs Act of 2017 impact on provision for federal income taxes	$ 0
Amounts due to MGM under tax sharing agreement	0
Uncertain tax positions	0
Interest and penalties recorded	$ 0	$ 0

Derivatives and Hedging Activ56

Derivatives and Hedging Activities - Fair Value and Presentation of Derivatives (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Prepaid expenses and other assets | Interest rate swaps - cash flow hedges
Derivative [Line Items]
Derivative asset	$ 11,306	$ 1,879

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes Attributable to Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal:
Current	$ 0	$ 0	$ 0
Deferred	0	0	0
Provision for federal income taxes	0	0	0
State:
Current	1,729	2,156	0
Deferred	3,177	108	0
Provision for state income taxes	$ 4,906	$ 2,264	$ 0

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Federal Income Tax Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal income tax statutory rate	35.00%	35.00%	35.00%
Federal valuation allowance	0.00%	0.00%	(35.00%)
Income not subject to federal income tax	(35.00%)	(35.00%)	(0.00%)
State taxes	2.90%	6.00%	0.00%
Effective tax rate	2.90%	6.00%	0.00%

Income Taxes - Major Tax-Effect

Income Taxes - Major Tax-Effected Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax liability - federal and state
Real estate investments, net	$ 28,544	$ 25,368
Total deferred tax liability	$ 28,544	$ 25,368

Shareholders' Equity and Part60

Shareholders' Equity and Partners' Capital - Narrative (Detail) - USD ($) $ / shares in Units, $ in Millions	Oct. 05, 2017	Sep. 11, 2017	Aug. 01, 2016	Apr. 25, 2016	Dec. 31, 2017	Dec. 31, 2016
Stockholders Equity and Partners Capital [Line Items]
Percent of Operating Partnership units acquired					26.60%
MGM
Stockholders Equity and Partners Capital [Line Items]
Percent of Operating Partnership units acquired				73.30%
Ownership percentage in Operating Partnership		72.30%			73.40%
Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Par value attributable to common shares (in dollars per share)				$ 0	$ 0	$ 0
Dividends attributable to common stock (in dollars per share)					1.5297
Ordinary dividends attributable to common stock (in dollars per share)					1.1542
Non-dividend distributions attributable to common stock (in dollars per share)					0.3755
Class B Share
Stockholders Equity and Partners Capital [Line Items]
Percentage of ownership, below which Class B not entitled to voting rights				30.00%
Par value attributable to common shares (in dollars per share)					$ 0
Borgata Transaction
Stockholders Equity and Partners Capital [Line Items]
Ownership percentage in Operating Partnership			23.70%
Borgata Transaction | MGM
Stockholders Equity and Partners Capital [Line Items]
Ownership percentage in Operating Partnership			76.30%
MGM National Harbor Transaction
Stockholders Equity and Partners Capital [Line Items]
Ownership percentage in Operating Partnership	26.60%
MGM National Harbor Transaction | MGM
Stockholders Equity and Partners Capital [Line Items]
Ownership percentage in Operating Partnership	73.40%
IPO
Stockholders Equity and Partners Capital [Line Items]
Shares issued under initial public offering (in shares)				57,500,000
Percent of Operating Partnership units acquired				26.70%
IPO | Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Shares issued under initial public offering (in shares)				57,500,000
Public Stock Offering
Stockholders Equity and Partners Capital [Line Items]
Ownership percentage in Operating Partnership		27.70%
Public Stock Offering | Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Number of shares offered in public offering (in shares)		13,225,000
Net proceeds from public offering of stock		$ 387.5
Over-Allotment Option
Stockholders Equity and Partners Capital [Line Items]
Shares issued under initial public offering (in shares)				7,500,000
Over-Allotment Option | Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Number of shares offered in public offering (in shares)		1,725,000

Shareholders' Equity and Part61

Shareholders' Equity and Partners' Capital - Distributions and Dividends Declared and Paid (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jan. 16, 2018	Oct. 13, 2017	Jul. 14, 2017	Apr. 13, 2017	Jan. 16, 2017	Oct. 14, 2016	Jul. 15, 2016	Jun. 30, 2016
Class A Shares
Class of Stock [Line Items]
Dividend per share (in dollars per share)		$ 0.3950	$ 0.3950	$ 0.3875	$ 0.3875	$ 0.3875	$ 0.2632
Dividend amount		$ 28,004	$ 22,777	$ 22,281	$ 22,281	$ 22,281	$ 15,134
Full quarter dividend rate (in dollars per share)								$ 0.3575
Class A Shares | Subsequent Event
Class of Stock [Line Items]
Dividend per share (in dollars per share)	$ 0.4200
Dividend amount	$ 29,777
MGP Operating Partnership
Class of Stock [Line Items]
Distributions per share (in dollars per unit)		$ 0.3950	$ 0.3950	$ 0.3875	$ 0.3875	$ 0.3875	$ 0.2632
Distribution amount		$ 101,222	$ 95,995	$ 94,109	$ 94,109	$ 94,109	$ 56,720
Full quarter distribution rate (in dollars per unit)								$ 0.3575
MGP Operating Partnership | Subsequent Event
Class of Stock [Line Items]
Distributions per share (in dollars per unit)	$ 0.4200
Distribution amount	$ 111,733

Accumulated Other Comprehensi62

Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Balance	$ 5,608,261	$ 6,058,959	$ 6,127,347
Other comprehensive income	9,782	1,879	0
Balance	6,067,739	5,608,261	6,058,959
Accumulated other comprehensive income attributable to Class A shareholders	3,108	445
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Balance	1,879	0
Other comprehensive income before reclassifications	566	1,521
Amounts reclassified from accumulated other comprehensive income to interest expense	9,216	358
Other comprehensive income	9,782
Balance	11,661	$ 1,879	$ 0
Other comprehensive loss attributable to noncontrolling interest	(8,553)
Accumulated other comprehensive income attributable to Class A shareholders	$ 3,108

Net Income Per Class A Share (D

Net Income Per Class A Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								8 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income attributable to Class A shares	$ 8,722	$ 11,025	$ 10,680	$ 11,348	$ 12,394	$ 10,591	$ 6,953	$ 0	$ 29,938	$ 41,775	$ 29,938	$ 0
Denominator:
Basic weighted average Class A shares outstanding (in shares)									57,502,158	61,733,136	57,502,158
Basic net income per Class A share (in dollars per share)	$ 0.12	$ 0.18	$ 0.19	$ 0.20	$ 0.22	$ 0.18	$ 0.12		$ 0.52	$ 0.68	$ 0.52
Numerator:
Net income attributable to Class A shares	$ 8,722	$ 11,025	$ 10,680	$ 11,348	$ 12,394	$ 10,591	$ 6,953	$ 0	$ 29,938	$ 41,775	$ 29,938	$ 0
Denominator:
Basic weighted average Class A shares outstanding (in shares)									57,502,158	61,733,136	57,502,158
Effect of dilutive shares for diluted net income per Class A share (in shares)									249,331	183,410
Weighted average shares for diluted net income per Class A share (in shares)									57,751,489	61,916,546	57,751,489
Diluted net income per Class A share (in dollars per share)	$ 0.12	$ 0.18	$ 0.18	$ 0.20	$ 0.21	$ 0.18	$ 0.12		$ 0.52	$ 0.67	$ 0.52
Stock Compensation Plan
Denominator:
Potentially dilutive shares (in shares)										0

Net Income Per Operating Part64

Net Income Per Operating Partnership Unit (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ 50,999	$ 42,671	$ 9,646	$ (67,970)	$ (84,383)	$ 119,729	$ 165,990	$ 35,346	$ (261,954)
Numerator:
Net income	31,723	43,700	43,875	46,692	50,999	42,671	9,646	(67,970)	(84,383)	$ 119,729	$ 165,990	35,346	(261,954)
Denominator:
Effect of dilutive shares for diluted net income per Operating Partnership unit (in units)										249,331	183,410
Stock Compensation Plan
Denominator:
Potentially dilutive shares (in shares)											0
MGP Operating Partnership
Numerator:
Net income	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ 50,999	$ 42,671	$ 9,646	(67,970)	(84,383)	$ 119,729	$ 165,990	$ 35,346	(261,954)
Denominator:
Basic (in units)										232,181,070	249,451,258	232,181,070
Basic net income per Operating Partnership Unit (in dollars per unit)	$ 0.12	$ 0.18	$ 0.18	$ 0.19	$ 0.21	$ 0.18	$ 0.12			$ 0.52	$ 0.67	$ 0.52
Numerator:
Net income	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ 50,999	$ 42,671	$ 9,646	$ (67,970)	$ (84,383)	$ 119,729	$ 165,990	$ 35,346	$ (261,954)
Denominator:
Basic (in units)										232,181,070	249,451,258	232,181,070
Effect of dilutive shares for diluted net income per Operating Partnership unit (in units)										249,331	183,410
Weighted average shares for diluted net income per Operating Partnership unit (in units)										232,430,401	249,634,668	232,430,401
Diluted net income per Operating Partnership unit (in dollars per unit)	$ 0.12	$ 0.18	$ 0.18	$ 0.19	$ 0.21	$ 0.18	$ 0.12			$ 0.52	$ 0.66	$ 0.52

Commitments and Contingencies65

Commitments and Contingencies (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 16,203
2,019	17,585
2,020	19,145
2,021	23,024
2,022	23,024
Thereafter	1,303,098
Total minimum lease payments	$ 1,402,079

Consolidating Financial Infor66

Consolidating Financial Information - Consolidating Balance Sheet Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Real estate investments, net	$ 10,021,938	$ 9,079,678
Cash and cash equivalents	259,722	360,492	$ 0	$ 0
Tenant and other receivables, net	6,385	9,503
Intercompany	0	0
Prepaid expenses and other assets	18,487	10,906
Investments in subsidiaries	0	0
Above market lease, asset	44,588	46,161
Total assets	10,351,120	9,506,740
LIABILITIES
Debt, net	3,934,628	3,621,942
Due to MGM Resorts International and affiliates	962	166
Intercompany	0	0
Accounts payable, accrued expenses and other liabilities	10,240	10,478
Above market lease, liability	47,069	47,957
Accrued interest	22,565	26,137
Dividend payable	111,733	94,109
Deferred revenue	127,640	72,322
Deferred income taxes, net	28,544	25,368
Total liabilities	4,283,381	3,898,479
General partner	0	0
Limited partners	6,067,739	5,608,261
Total partners’ capital	6,067,739	5,608,261
Total liabilities and shareholders' equity	10,351,120	9,506,740
Eliminations
ASSETS
Real estate investments, net	0	0
Cash and cash equivalents	0	0	0
Tenant and other receivables, net	0	0
Intercompany	(1,383,397)	(880,823)
Prepaid expenses and other assets	0	0
Investments in subsidiaries	(8,479,388)	(8,100,942)
Above market lease, asset	0	0
Total assets	(9,862,785)	(8,981,765)
LIABILITIES
Debt, net	0	0
Due to MGM Resorts International and affiliates	0	0
Intercompany	(1,383,397)	(880,823)
Accounts payable, accrued expenses and other liabilities	0	0
Above market lease, liability	0	0
Accrued interest	0	0
Dividend payable	0	0
Deferred revenue	0	0
Deferred income taxes, net	0	0
Total liabilities	(1,383,397)	(880,823)
General partner	0	0
Limited partners	(8,479,388)	(8,100,942)
Total partners’ capital	(8,479,388)	(8,100,942)
Total liabilities and shareholders' equity	(9,862,785)	(8,981,765)
Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Real estate investments, net	10,021,450	9,079,678
Cash and cash equivalents	0	0	0
Tenant and other receivables, net	6,086	7,444
Intercompany	0	0
Prepaid expenses and other assets	0	1,739
Investments in subsidiaries	0	0
Above market lease, asset	44,588	46,161
Total assets	10,072,124	9,135,022
LIABILITIES
Debt, net	0	0
Due to MGM Resorts International and affiliates	0	166
Intercompany	1,383,397	880,823
Accounts payable, accrued expenses and other liabilities	6,086	7,444
Above market lease, liability	47,069	47,957
Accrued interest	0	0
Dividend payable	0	0
Deferred revenue	127,640	72,322
Deferred income taxes, net	28,544	25,368
Total liabilities	1,592,736	1,034,080
General partner	0	0
Limited partners	8,479,388	8,100,942
Total partners’ capital	8,479,388	8,100,942
Total liabilities and shareholders' equity	10,072,124	9,135,022
Operating Partnership
ASSETS
Real estate investments, net	10,021,938	9,079,678
Cash and cash equivalents	259,722	360,492	0	0
Tenant and other receivables, net	6,385	9,503
Prepaid expenses and other assets	18,487	10,906
Above market lease, asset	44,588	46,161
Total assets	10,351,120	9,506,740
LIABILITIES
Debt, net	3,934,628	3,621,942
Due to MGM Resorts International and affiliates	962	166
Accounts payable, accrued expenses and other liabilities	10,240	10,478
Above market lease, liability	47,069	47,957
Accrued interest	22,565	26,137
Dividend payable	111,733	94,109
Deferred revenue	127,640	72,322
Deferred income taxes, net	28,544	25,368
Total liabilities	4,283,381	3,898,479
General partner	0	0
Limited partners	6,067,739	5,608,261
Total partners’ capital	6,067,739	5,608,261	6,058,959	$ 6,127,347
Total liabilities and shareholders' equity	10,351,120	9,506,740
Operating Partnership | Reportable Legal Entities
ASSETS
Real estate investments, net	488	0
Cash and cash equivalents	259,722	360,492	0
Tenant and other receivables, net	299	2,059
Intercompany	1,383,397	880,823
Prepaid expenses and other assets	18,487	9,167
Investments in subsidiaries	8,479,388	8,100,942
Above market lease, asset	0	0
Total assets	10,141,781	9,353,483
LIABILITIES
Debt, net	3,934,628	3,621,942
Due to MGM Resorts International and affiliates	962	0
Intercompany	0	0
Accounts payable, accrued expenses and other liabilities	4,154	3,034
Above market lease, liability	0	0
Accrued interest	22,565	26,137
Dividend payable	111,733	94,109
Deferred revenue	0	0
Deferred income taxes, net	0	0
Total liabilities	4,074,042	3,745,222
General partner	0	0
Limited partners	6,067,739	5,608,261
Total partners’ capital	6,067,739	5,608,261
Total liabilities and shareholders' equity	10,141,781	9,353,483
Co-Issuer | Reportable Legal Entities
ASSETS
Real estate investments, net	0	0
Cash and cash equivalents	0	0	$ 0
Tenant and other receivables, net	0	0
Intercompany	0	0
Prepaid expenses and other assets	0	0
Investments in subsidiaries	0	0
Above market lease, asset	0	0
Total assets	0	0
LIABILITIES
Debt, net	0	0
Due to MGM Resorts International and affiliates	0	0
Intercompany	0	0
Accounts payable, accrued expenses and other liabilities	0	0
Above market lease, liability	0	0
Accrued interest	0	0
Dividend payable	0	0
Deferred revenue	0	0
Deferred income taxes, net	0	0
Total liabilities	0	0
General partner	0	0
Limited partners	0	0
Total partners’ capital	0	0
Total liabilities and shareholders' equity	$ 0	$ 0

Consolidating Financial Infor67

Consolidating Financial Information - Consolidating Statement of Operations and Comprehensive Income Information (Detail) - USD ($) $ in Thousands	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Rental revenue											$ 675,089	$ 419,239	$ 0
Tenant reimbursements and other											90,606	48,309	0
Revenues, net	$ 214,542	$ 182,798	$ 184,456	$ 183,899	$ 184,146	$ 172,499	$ 110,903	$ 0			765,695	467,548	0
Expenses
Depreciation											260,455	220,667	196,816
Property transactions, net											34,022	4,684	6,665
Reimbursable expenses											88,254	68,063	58,473
Amortization of above market lease, net											686	286	0
Acquisition-related expenses											17,304	10,178	0
General and administrative											12,189	9,896	0
Expenses, net											412,910	313,774	261,954
Operating income (loss)	81,218	89,378	90,167	92,022	95,759	86,792	39,193	(67,970)			352,785	153,774	(261,954)
Equity in earnings of subsidiaries											0	0
Non-operating income (expense)
Interest income											3,907	774	0
Interest expense											(184,175)	(116,212)	0
Other non-operating											(1,621)	(726)	0
Non-operating income (expense)											(181,889)	(116,164)	0
Income (loss) before income taxes											170,896	37,610	(261,954)
Provision for income taxes											(4,906)	(2,264)	0
Net income (loss)	31,723	43,700	43,875	46,692	50,999	42,671	9,646	(67,970)	$ (84,383)	$ 119,729	165,990	35,346	(261,954)
Unrealized gain on cash flow hedges											9,782	1,879	0
Comprehensive income (loss)											175,772	37,225	(261,954)
Eliminations
Revenues
Rental revenue											0	0
Tenant reimbursements and other											0	0
Revenues, net											0	0
Expenses
Depreciation											0	0
Property transactions, net											0	0
Reimbursable expenses											0	0
Amortization of above market lease, net											0	0
Acquisition-related expenses											0	0
General and administrative											0	0
Expenses, net											0	0
Operating income (loss)											0	0
Equity in earnings of subsidiaries											(377,372)	(171,584)
Non-operating income (expense)
Interest income											0	0
Interest expense											0	0
Other non-operating											0	0
Non-operating income (expense)											0	0
Income (loss) before income taxes											(377,372)	(171,584)
Provision for income taxes											0	0
Net income (loss)											(377,372)	(171,584)
Unrealized gain on cash flow hedges											0	0
Comprehensive income (loss)											(377,372)	(171,584)
Guarantor Subsidiaries | Reportable Legal Entities
Revenues
Rental revenue											675,089	419,239
Tenant reimbursements and other											90,606	48,309
Revenues, net											765,695	467,548
Expenses
Depreciation											260,455	220,667
Property transactions, net											34,022	4,684
Reimbursable expenses											88,254	68,063
Amortization of above market lease, net											686	286
Acquisition-related expenses											0	0
General and administrative											0	0
Expenses, net											383,417	293,700
Operating income (loss)											382,278	173,848
Equity in earnings of subsidiaries											0	0
Non-operating income (expense)
Interest income											0	0
Interest expense											0	0
Other non-operating											0	0
Non-operating income (expense)											0	0
Income (loss) before income taxes											382,278	173,848
Provision for income taxes											(4,906)	(2,264)
Net income (loss)											377,372	171,584
Unrealized gain on cash flow hedges											0	0
Comprehensive income (loss)											377,372	171,584
Operating Partnership
Revenues
Rental revenue											675,089	419,239	0
Tenant reimbursements and other											90,606	48,309	0
Revenues, net	214,542	182,798	184,456	183,899	184,146	172,499	110,903	0			765,695	467,548	0
Expenses
Depreciation											260,455	220,667	196,816
Property transactions, net											34,022	4,684	6,665
Reimbursable expenses											88,254	68,063	58,473
Amortization of above market lease, net											686	286	0
Acquisition-related expenses											17,304	10,178	0
General and administrative											12,189	9,896	0
Expenses, net											412,910	313,774	261,954
Operating income (loss)	81,218	89,378	90,167	92,022	95,759	86,792	39,193	(67,970)			352,785	153,774	(261,954)
Non-operating income (expense)
Interest income											3,907	774	0
Interest expense											(184,175)	(116,212)	0
Other non-operating											(1,621)	(726)	0
Non-operating income (expense)											(181,889)	(116,164)	0
Income (loss) before income taxes											170,896	37,610	(261,954)
Provision for income taxes											(4,906)	(2,264)	0
Net income (loss)	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ 50,999	$ 42,671	$ 9,646	$ (67,970)	$ (84,383)	$ 119,729	165,990	35,346	(261,954)
Unrealized gain on cash flow hedges											9,782	1,879	0
Comprehensive income (loss)											175,772	37,225	$ (261,954)
Operating Partnership | Reportable Legal Entities
Revenues
Rental revenue											0	0
Tenant reimbursements and other											0	0
Revenues, net											0	0
Expenses
Depreciation											0	0
Property transactions, net											0	0
Reimbursable expenses											0	0
Amortization of above market lease, net											0	0
Acquisition-related expenses											17,304	10,178
General and administrative											12,189	9,896
Expenses, net											29,493	20,074
Operating income (loss)											(29,493)	(20,074)
Equity in earnings of subsidiaries											377,372	171,584
Non-operating income (expense)
Interest income											3,907	774
Interest expense											(184,175)	(116,212)
Other non-operating											(1,621)	(726)
Non-operating income (expense)											(181,889)	(116,164)
Income (loss) before income taxes											165,990	35,346
Provision for income taxes											0	0
Net income (loss)											165,990	35,346
Unrealized gain on cash flow hedges											9,782	1,879
Comprehensive income (loss)											175,772	37,225
Co-Issuer | Reportable Legal Entities
Revenues
Rental revenue											0	0
Tenant reimbursements and other											0	0
Revenues, net											0	0
Expenses
Depreciation											0	0
Property transactions, net											0	0
Reimbursable expenses											0	0
Amortization of above market lease, net											0	0
Acquisition-related expenses											0	0
General and administrative											0	0
Expenses, net											0	0
Operating income (loss)											0	0
Equity in earnings of subsidiaries											0	0
Non-operating income (expense)
Interest income											0	0
Interest expense											0	0
Other non-operating											0	0
Non-operating income (expense)											0	0
Income (loss) before income taxes											0	0
Provision for income taxes											0	0
Net income (loss)											0	0
Unrealized gain on cash flow hedges											0	0
Comprehensive income (loss)											$ 0	$ 0

Consolidating Financial Infor68

Consolidating Financial Information - Consolidating Statement of Cash Flows Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net cash provided by (used in) operating activities	$ 482,578	$ 297,781	$ (58,473)
Cash flows from investing activities
Capital expenditures for property and equipment	(488)	(138,987)	(129,308)
MGM National Harbor Transaction	(462,500)	0	0
Net cash used in investing activities	(462,988)	(138,987)	(129,308)
Cash flows from financing activities
Proceeds from issuance of debt	350,000	3,700,000	0
Deferred financing costs	(5,598)	(77,163)	0
Repayment of assumed debt and bridge facilities	(425,000)	(4,544,850)	0
Repayment of debt principal	(41,875)	(16,750)	0
Proceeds from issuance of Operating Partnership units by MGP	387,548	1,132,468
Dividends and distributions paid	(385,435)	(150,829)	0
Cash received by Parent on behalf of Guarantor Subsidiaries	0	0
Net cash transfers from Parent	0	158,822	187,781
Net cash provided by (used in) financing activities	(120,360)	201,698	187,781
Cash and cash equivalents
Net increase (decrease) for the period	(100,770)	360,492	0
Balance, beginning of period	360,492	0	0
Balance, end of period	259,722	360,492	0
Eliminations
Cash flows from operating activities
Net cash provided by (used in) operating activities	0	0
Cash flows from investing activities
Capital expenditures for property and equipment	0	0
MGM National Harbor Transaction	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Proceeds from issuance of debt	0	0
Deferred financing costs	0	0
Repayment of assumed debt and bridge facilities	0	0
Repayment of debt principal	0	0
Proceeds from issuance of Operating Partnership units by MGP	0	0
Dividends and distributions paid	0	0
Cash received by Parent on behalf of Guarantor Subsidiaries	0	0
Net cash transfers from Parent		0
Net cash provided by (used in) financing activities	0	0
Cash and cash equivalents
Net increase (decrease) for the period	0	0
Balance, beginning of period	0	0
Balance, end of period	0	0	0
Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	681,503	397,665
Cash flows from investing activities
Capital expenditures for property and equipment	0	(138,987)
MGM National Harbor Transaction	0
Net cash used in investing activities	0	(138,987)
Cash flows from financing activities
Proceeds from issuance of debt	0	0
Deferred financing costs	0	0
Repayment of assumed debt and bridge facilities	0	0
Repayment of debt principal	0	0
Proceeds from issuance of Operating Partnership units by MGP	0	0
Dividends and distributions paid	0	0
Cash received by Parent on behalf of Guarantor Subsidiaries	(681,503)	(417,500)
Net cash transfers from Parent		158,822
Net cash provided by (used in) financing activities	(681,503)	(258,678)
Cash and cash equivalents
Net increase (decrease) for the period	0	0
Balance, beginning of period	0	0
Balance, end of period	0	0	0
Operating Partnership
Cash flows from operating activities
Net cash provided by (used in) operating activities	482,578	297,781	(58,473)
Cash flows from investing activities
Capital expenditures for property and equipment	(488)	(138,987)	(129,308)
MGM National Harbor Transaction	(462,500)	0	0
Net cash used in investing activities	(462,988)	(138,987)	(129,308)
Cash flows from financing activities
Proceeds from issuance of debt	350,000	3,700,000	0
Deferred financing costs	(5,598)	(77,163)	0
Repayment of assumed debt and bridge facilities	(425,000)	(4,544,850)	0
Repayment of debt principal	(41,875)	(16,750)	0
Proceeds from issuance of Operating Partnership units by MGP	387,548	1,132,468	0
Dividends and distributions paid	(385,435)	(150,829)	0
Net cash transfers from Parent	0	158,822	187,781
Net cash provided by (used in) financing activities	(120,360)	201,698	187,781
Cash and cash equivalents
Net increase (decrease) for the period	(100,770)	360,492	0
Balance, beginning of period	360,492	0	0
Balance, end of period	259,722	360,492	0
Operating Partnership | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	(198,925)	(99,884)
Cash flows from investing activities
Capital expenditures for property and equipment	(488)	0
MGM National Harbor Transaction	(462,500)
Net cash used in investing activities	(462,988)	0
Cash flows from financing activities
Proceeds from issuance of debt	350,000	3,700,000
Deferred financing costs	(5,598)	(77,163)
Repayment of assumed debt and bridge facilities	(425,000)	(4,544,850)
Repayment of debt principal	(41,875)	(16,750)
Proceeds from issuance of Operating Partnership units by MGP	387,548	1,132,468
Dividends and distributions paid	(385,435)	(150,829)
Cash received by Parent on behalf of Guarantor Subsidiaries	681,503	417,500
Net cash transfers from Parent		0
Net cash provided by (used in) financing activities	561,143	460,376
Cash and cash equivalents
Net increase (decrease) for the period	(100,770)	360,492
Balance, beginning of period	360,492	0
Balance, end of period	259,722	360,492	0
Co-Issuer | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	0	0
Cash flows from investing activities
Capital expenditures for property and equipment	0	0
MGM National Harbor Transaction	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Proceeds from issuance of debt	0	0
Deferred financing costs	0	0
Repayment of assumed debt and bridge facilities	0	0
Repayment of debt principal	0	0
Proceeds from issuance of Operating Partnership units by MGP	0	0
Dividends and distributions paid	0	0
Cash received by Parent on behalf of Guarantor Subsidiaries	0	0
Net cash transfers from Parent		0
Net cash provided by (used in) financing activities	0	0
Cash and cash equivalents
Net increase (decrease) for the period	0	0
Balance, beginning of period	0	0
Balance, end of period	$ 0	$ 0	$ 0

MGP Selected Quarterly Financ69

MGP Selected Quarterly Financial Results (Unaudited) - Summary of Quarterly Financial Results (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 214,542	$ 182,798	$ 184,456	$ 183,899	$ 184,146	$ 172,499	$ 110,903	$ 0			$ 765,695	$ 467,548	$ 0
Operating income	81,218	89,378	90,167	92,022	95,759	86,792	39,193	(67,970)			352,785	153,774	(261,954)
Net income (loss)	31,723	43,700	43,875	46,692	50,999	42,671	9,646	(67,970)	$ (84,383)	$ 119,729	165,990	35,346	(261,954)
Net income attributable to Class A shareholders	$ 8,722	$ 11,025	$ 10,680	$ 11,348	$ 12,394	$ 10,591	$ 6,953	$ 0		$ 29,938	$ 41,775	$ 29,938	$ 0
Net income per Class A share (basic) (in dollars per share)	$ 0.12	$ 0.18	$ 0.19	$ 0.20	$ 0.22	$ 0.18	$ 0.12			$ 0.52	$ 0.68	$ 0.52
Net income per Class A share (diluted) (in dollars per share)	$ 0.12	$ 0.18	$ 0.18	$ 0.20	$ 0.21	$ 0.18	$ 0.12			$ 0.52	$ 0.67	$ 0.52

MGP Selected Quarterly Financ70

MGP Selected Quarterly Financial Results (Unaudited) - Narrative (Detail) - USD ($) $ in Millions	Oct. 05, 2017	Apr. 01, 2017	Aug. 01, 2016
MGM National Harbor | Master Lease - Rent Increase
Segment Reporting Information [Line Items]
Rental revenues under master lease	$ 95
MGM National Harbor | Base Rent Increase
Segment Reporting Information [Line Items]
Rental revenues under master lease	85.5
MGM National Harbor | Percentage Rent Increase
Segment Reporting Information [Line Items]
Rental revenues under master lease	$ 9.5
Borgata | Master Lease - Rent Increase
Segment Reporting Information [Line Items]
Rental revenues under master lease		$ 596.7	$ 100
Borgata | Base Rent Increase
Segment Reporting Information [Line Items]
Rental revenues under master lease			90
Borgata | Percentage Rent Increase
Segment Reporting Information [Line Items]
Rental revenues under master lease			$ 10

Operating Partnership Selecte71

Operating Partnership Selected Quarterly Financial Results (Unaudited) - Summary of Quarterly Financial Results (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 214,542	$ 182,798	$ 184,456	$ 183,899	$ 184,146	$ 172,499	$ 110,903	$ 0			$ 765,695	$ 467,548	$ 0
Operating income (loss)	81,218	89,378	90,167	92,022	95,759	86,792	39,193	(67,970)			352,785	153,774	(261,954)
Net income (loss)	31,723	43,700	43,875	46,692	50,999	42,671	9,646	(67,970)	$ (84,383)	$ 119,729	165,990	35,346	(261,954)
MGP Operating Partnership
Segment Reporting Information [Line Items]
Revenues	214,542	182,798	184,456	183,899	184,146	172,499	110,903	0			765,695	467,548	0
Operating income (loss)	81,218	89,378	90,167	92,022	95,759	86,792	39,193	(67,970)			352,785	153,774	(261,954)
Net income (loss)	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ 50,999	$ 42,671	$ 9,646	$ (67,970)	$ (84,383)	$ 119,729	$ 165,990	$ 35,346	$ (261,954)
Net income per Operating Partnership unit (basic) (in dollars per unit)	$ 0.12	$ 0.18	$ 0.18	$ 0.19	$ 0.21	$ 0.18	$ 0.12			$ 0.52	$ 0.67	$ 0.52
Net income per Operating Partnership unit (diluted) (in dollars per unit)	$ 0.12	$ 0.18	$ 0.18	$ 0.19	$ 0.21	$ 0.18	$ 0.12			$ 0.52	$ 0.66	$ 0.52

Schedule III - Real Estate an72

Schedule III - Real Estate and Accumulated Depreciation - Summary of Real Estate Properties (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Acquisition Costs
Land	$ 4,143,513
Building and Improvements	8,444,819
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	125,398
Gross Amount at Which Carried at Close of Period
Land	4,143,513
Building and Improvements	8,512,334
Total	12,655,847	$ 11,468,170	$ 9,965,185
Accumulated Depreciation	(2,633,909)	$ (2,388,492)	$ (2,171,546)
Aggregate cost of land, buildings, and improvements for federal income tax purposes	8,700,000
Investment Properties
Acquisition Costs
Land	4,143,513
Building and Improvements	8,444,331
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	125,398
Gross Amount at Which Carried at Close of Period
Land	4,143,513
Building and Improvements	8,511,846
Total	12,655,359
Accumulated Depreciation	(2,633,909)
New York-New York | Investment Properties
Acquisition Costs
Land	149,984
Building and Improvements	484,001
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	149,984
Building and Improvements	484,738
Total	634,722
Accumulated Depreciation	(282,949)
The Mirage | Investment Properties
Acquisition Costs
Land	1,017,562
Building and Improvements	760,222
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	1,017,562
Building and Improvements	759,386
Total	1,776,948
Accumulated Depreciation	(467,094)
Mandalay Bay | Investment Properties
Acquisition Costs
Land	1,199,785
Building and Improvements	1,882,381
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	1,199,785
Building and Improvements	1,873,959
Total	3,073,744
Accumulated Depreciation	(681,192)
Luxor | Investment Properties
Acquisition Costs
Land	440,685
Building and Improvements	710,796
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	440,685
Building and Improvements	705,909
Total	1,146,594
Accumulated Depreciation	(327,832)
Excalibur | Investment Properties
Acquisition Costs
Land	814,805
Building and Improvements	342,685
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	43,350
Gross Amount at Which Carried at Close of Period
Land	814,805
Building and Improvements	383,754
Total	1,198,559
Accumulated Depreciation	(131,675)
Monte Carlo | Investment Properties
Acquisition Costs
Land	291,035
Building and Improvements	376,625
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	82,048
Gross Amount at Which Carried at Close of Period
Land	291,035
Building and Improvements	391,103
Total	682,138
Accumulated Depreciation	(146,147)
Monte Carlo | Investment Properties
Acquisition Costs
Land	104,945
Building and Improvements	561,457
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	104,945
Building and Improvements	560,404
Total	665,349
Accumulated Depreciation	(241,814)
MGM Grand Detroit | Investment Properties
Acquisition Costs
Land	52,509
Building and Improvements	597,324
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	52,509
Building and Improvements	597,324
Total	649,833
Accumulated Depreciation	(161,804)
Gold Strike Tunica | Investment Properties
Acquisition Costs
Land	3,609
Building and Improvements	179,146
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	3,609
Building and Improvements	178,673
Total	182,282
Accumulated Depreciation	(83,720)
Borgata | Investment Properties
Acquisition Costs
Land	35,568
Building and Improvements	1,264,432
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	35,568
Building and Improvements	1,256,189
Total	1,291,757
Accumulated Depreciation	(64,322)
MGM National Harbor | Investment Properties
Acquisition Costs
Land	0
Building and Improvements	1,183,909
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	0
Building and Improvements	1,220,292
Total	1,220,292
Accumulated Depreciation	(36,383)
Borgata | Investment Properties
Acquisition Costs
Land	33,026
Building and Improvements	101,353
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	33,026
Building and Improvements	100,115
Total	133,141
Accumulated Depreciation	(8,977)
MGP Corporate Office | Corporate Property
Acquisition Costs
Land	0
Building and Improvements	488
Costs Capitalized Subsequent to Acquisition
Land	0
Building and Improvements	0
Gross Amount at Which Carried at Close of Period
Land	0
Building and Improvements	488
Total	488
Accumulated Depreciation	$ 0

Schedule III - Real Estate an73

Schedule III - Real Estate and Accumulated Depreciation - Summary of Depreciable Lives (Detail)	12 Months Ended
	Dec. 31, 2017
Buildings and building improvements | Minimum
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years
Buildings and building improvements | Maximum
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	40 years
Land improvements | Minimum
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	10 years
Land improvements | Maximum
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years
Fixtures and integral equipment | Minimum
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	3 years
Fixtures and integral equipment | Maximum
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years

Schedule III - Real Estate an74

Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of year	$ 11,468,170	$ 9,965,185
Additions	1,273,288	1,511,390
Impairments	0	0
Dispositions and write-offs	(85,611)	(8,405)
Balance at end of year	12,655,847	$ 11,468,170
MGM National Harbor Transaction
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Additions	$ 1,200,000

Schedule III - Real Estate an75

Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	$ (2,388,492)	$ (2,171,546)
Depreciation expense	(260,455)	(220,667)
Property transactions, net	(34,022)	0
Dispositions and write-offs	85,443	3,721
MGM National Harbor Transaction	(36,383)	0
Balance at end of year	$ (2,633,909)	$ (2,388,492)