MGM Growth Properties Operating Partnership (MGP) 10-K 27 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 22, 2019	Jun. 30, 2018
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
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 Voluntarily Files	No
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status - MGP	Yes
Public Float			$ 2.1
Entity Common Stock, Shares Outstanding		90,461,166
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false
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 Voluntarily Files	No
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status - MGP	Yes
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Real estate investments, net	$ 9,742,225	$ 10,021,938
Property and equipment, used in operations, net	784,295	0
Cash and cash equivalents	59,817	259,722
Tenant and other receivables, net	14,990	6,385
Prepaid expenses and other assets	37,837	18,487
Above market lease, asset	43,014	44,588
Goodwill	17,915	0
Other intangible assets, net	251,214	0
Total assets	10,951,307	10,351,120
Liabilities
Debt, net	4,666,949	3,934,628
Due to MGM Resorts International and affiliates	307	962
Accounts payable, accrued expenses and other liabilities	49,602	10,240
Above market lease, liability	46,181	47,069
Accrued interest	26,096	22,565
Dividend and distribution payable	119,055	111,733
Deferred revenue	163,977	127,640
Deferred income taxes, net	33,634	28,544
Total liabilities	5,105,801	4,283,381
Commitments and contingencies (Note 14)
Shareholders' equity
Class A shares: no par value, 1,000,000,000 shares authorized, 70,911,166 and 70,896,795 shares issued and outstanding as of December 31, 2018 and December 31, 2017, respectively	0	0
Additional paid-in capital	1,712,671	1,716,490
Accumulated deficit	(150,908)	(94,948)
Accumulated other comprehensive income	4,208	3,108
Total Class A shareholders' equity	1,565,971	1,624,650
Noncontrolling interest	4,279,535	4,443,089
Total shareholders' equity	5,845,506	6,067,739
Partners’ capital
General partner	0	0
Limited partners	5,845,506	6,067,739
Total partners’ capital	5,845,506	6,067,739
Total liabilities and shareholders' equity	10,951,307	10,351,120
MGP Operating Partnership
ASSETS
Real estate investments, net	9,742,225	10,021,938
Property and equipment, used in operations, net	784,295	0
Cash and cash equivalents	59,817	259,722
Tenant and other receivables, net	14,990	6,385
Prepaid expenses and other assets	37,837	18,487
Above market lease, asset	43,014	44,588
Goodwill	17,915	0
Total assets	10,951,307	10,351,120
Liabilities
Debt, net	4,666,949	3,934,628
Due to MGM Resorts International and affiliates	307	962
Accounts payable, accrued expenses and other liabilities	49,602	10,240
Above market lease, liability	46,181	47,069
Accrued interest	26,096	22,565
Dividend and distribution payable	119,055	111,733
Deferred revenue	163,977	127,640
Deferred income taxes, net	33,634	28,544
Total liabilities	5,105,801	4,283,381
Commitments and contingencies (Note 14)
Partners’ capital
General partner	0	0
Limited partners	5,845,506	6,067,739
Total partners’ capital	5,845,506	6,067,739
Total liabilities and shareholders' equity	$ 10,951,307	$ 10,351,120

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - shares	Dec. 31, 2018	Dec. 31, 2017
MGP Operating Partnership
Units Issued (in shares)	266,045,289	266,030,918
Units Outstanding (in shares)	266,045,289	266,030,918
Class A Shares
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	70,911,166	70,896,795
Common stock, shares outstanding (in shares)	70,911,166	70,896,795

Combined and Consolidated State

Combined and Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Rental revenue	$ 746,253	$ 675,089	$ 419,239
Total revenues	1,002,444	765,695	467,548
Revenues		765,695	467,548
Expenses
Depreciation and amortization	273,031	260,455	220,667
Property transactions, net	20,319	34,022	4,684
Reimbursable expenses	119,531	88,254	68,063
Amortization of above market lease, net	686	686	286
Acquisition-related expenses	8,887	17,304	10,178
General and administrative	16,178	12,189	9,896
Expenses, net	526,685	412,910	313,774
Operating income	475,759	352,785	153,774
Non-operating income (expense)
Interest income	2,501	3,907	774
Interest expense	(215,532)	(184,175)	(116,212)
Other non-operating	(7,191)	(1,621)	(726)
Non-operating income (expense)	(220,222)	(181,889)	(116,164)
Income before income taxes	255,537	170,896	37,610
Provision for income taxes	(10,835)	(4,906)	(2,264)
Net income	244,702	165,990	35,346
Less: Net income attributable to noncontrolling interest	(177,637)	(124,215)	$ (5,408)
Net income attributable to Class A shareholders	$ 67,065	$ 41,775
Weighted average Class A shares outstanding:
Basic (in shares)	70,997,589	61,733,136	57,502,158
Diluted (in shares)	71,185,674	61,916,546	57,751,489
Per Class A share data
Net income per Class A share (basic) (in dollars per share)	$ 0.94	$ 0.68	$ 0.52
Net income per Class A share (diluted) (in dollars per share)	$ 0.94	$ 0.67	$ 0.52
Tenant reimbursements and other
Revenues
Rental revenue	$ 123,200	$ 90,600	$ 48,300
Total revenues	123,242	90,606	48,309
Gaming, food, beverage and other
Revenues
Total revenues	132,949	0	0
Expenses
Gaming, food, beverage and other	88,053	0	0
MGP Operating Partnership
Revenues
Rental revenue	746,253	675,089	419,239
Revenues	1,002,444	765,695	467,548
Expenses
Depreciation and amortization	273,031	260,455	220,667
Property transactions, net	20,319	34,022	4,684
Reimbursable expenses	119,531	88,254	68,063
Amortization of above market lease, net	686	686	286
Acquisition-related expenses	8,887	17,304	10,178
General and administrative	16,178	12,189	9,896
Expenses, net	526,685	412,910	313,774
Operating income	475,759	352,785	153,774
Non-operating income (expense)
Interest income	2,501	3,907	774
Interest expense	(215,532)	(184,175)	(116,212)
Other non-operating	(7,191)	(1,621)	(726)
Non-operating income (expense)	(220,222)	(181,889)	(116,164)
Income before income taxes	255,537	170,896	37,610
Provision for income taxes	(10,835)	(4,906)	(2,264)
Net income	$ 244,702	$ 165,990	$ 35,346
Weighted average Operating Partnership units outstanding:
Basic (in units)	266,131,712	249,451,258	232,181,070
Diluted (in units)	266,319,797	249,634,668	232,430,401
Net income per Operating Partnership unit (basic in dollars per share)	$ 0.92	$ 0.67	$ 0.52
Net income per Operating Partnership unit (diluted in dollars per share)	$ 0.92	$ 0.66	$ 0.52
MGP Operating Partnership | Tenant reimbursements and other
Revenues
Total revenues	$ 123,242	$ 90,606	$ 48,309
MGP Operating Partnership | Gaming, food, beverage and other
Revenues
Total revenues	132,949	0	0
Expenses
Gaming, food, beverage and other	$ 88,053	$ 0	$ 0

Combined and Consolidated Sta_2

Combined and Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 244,702	$ 165,990	$ 35,346
Other comprehensive income
Unrealized gain on cash flow hedges	4,128	9,782	1,879
Other comprehensive income	4,128	9,782	1,879
Comprehensive income	248,830	175,772	37,225
Less: Comprehensive income attributable to noncontrolling interests	(180,665)	(131,236)	(6,842)
Comprehensive income attributable to Class A shareholders	68,165	44,536	30,383
MGP Operating Partnership
Net income	244,702	165,990	35,346
Other comprehensive income
Unrealized gain on cash flow hedges	4,128	9,782	1,879
Other comprehensive income	4,128	9,782	1,879
Comprehensive income	$ 248,830	$ 175,772	$ 37,225

Combined and Consolidated Sta_3

Combined and Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 244,702	$ 165,990	$ 35,346
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	273,031	260,455	220,667
Property transactions, net	20,319	34,022	4,684
Amortization of deferred financing costs and debt discount	12,031	11,360	7,195
Loss on retirement of debt	2,736	798	0
Amortization related to above market lease, net	686	686	286
Deemed contributions - tax sharing agreement	5,745	1,730	2,156
Straight-line rental revenues	20,680	6,414	(1,739)
Amortization of deferred revenue	(3,711)	(2,352)	(80)
Share-based compensation	2,093	1,336	510
Deferred income taxes	5,090	3,176	108
Change in operating assets and liabilities:
Tenant and other receivables, net	(2,016)	3,118	(9,503)
Prepaid expenses and other assets	477	(1,537)	6,747
Due to MGM Resorts International and affiliates	(655)	796	166
Accounts payable, accrued expenses and other liabilities	(4,532)	158	5,101
Accrued interest	3,531	(3,572)	26,137
Net cash provided by operating activities	580,207	482,578	297,781
Cash flows from investing activities
Capital expenditures for property and equipment	(1,578)	(488)	(138,987)
Acquisition of Northfield, net of cash acquired	(1,034,534)	0	0
MGM National Harbor Transaction	0	(462,500)	0
Net cash used in investing activities	(1,036,112)	(462,988)	(138,987)
Cash flows from financing activities
Net borrowings (repayments) under bank credit facility	727,750	(41,875)	(16,750)
Proceeds from issuance of debt	0	350,000	3,700,000
Deferred financing costs	(17,490)	(5,598)	(77,163)
Repayment of assumed debt and bridge facilities	0	(425,000)	(4,544,850)
Issuance of Class A shares	0	404,685	1,207,500
Class A share issuance costs	0	(17,137)	(75,032)
Dividends and distributions paid	(454,260)	(385,435)	(150,829)
Net cash transfers from Parent	0	0	158,822
Net cash provided by (used in) financing activities	256,000	(120,360)	201,698
Cash and cash equivalents
Net (decrease) increase for the period	(199,905)	(100,770)	360,492
Balance, beginning of period	259,722	360,492	0
Balance, end of period	59,817	259,722	360,492
Supplemental cash flow disclosures
Interest paid	199,429	176,033	82,880
Non-cash investing and financing activities
Non-Normal Tenant Improvements by Tenant	19,316	52,995	72,402
Accrual of dividend and distribution payable to Class A shareholders and Operating Partnership unit holders	119,055	111,733	94,109
MGM National Harbor Transaction
Non-cash investing and financing activities
Net assets acquired	0	721,409	0
Borgata Transaction
Non-cash investing and financing activities
Net assets acquired	0	0	1,273,230
MGP Operating Partnership
Cash flows from operating activities
Net income	244,702	165,990	35,346
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	273,031	260,455	220,667
Property transactions, net	20,319	34,022	4,684
Amortization of deferred financing costs and debt discount	12,031	11,360	7,195
Loss on retirement of debt	2,736	798	0
Amortization related to above market lease, net	686	686	286
Deemed contributions - tax sharing agreement	5,745	1,730	2,156
Straight-line rental revenues	20,680	6,414	(1,739)
Amortization of deferred revenue	(3,711)	(2,352)	(80)
Share-based compensation	2,093	1,336	510
Deferred income taxes	5,090	3,176	108
Change in operating assets and liabilities:
Tenant and other receivables, net	(2,016)	3,118	(9,503)
Prepaid expenses and other assets	477	(1,537)	6,747
Due to MGM Resorts International and affiliates	(655)	796	166
Accounts payable, accrued expenses and other liabilities	(4,532)	158	5,101
Accrued interest	3,531	(3,572)	26,137
Net cash provided by operating activities	580,207	482,578	297,781
Cash flows from investing activities
Capital expenditures for property and equipment	(1,578)	(488)	(138,987)
Acquisition of Northfield, net of cash acquired	(1,034,534)	0	0
MGM National Harbor Transaction	0	(462,500)	0
Net cash used in investing activities	(1,036,112)	(462,988)	(138,987)
Cash flows from financing activities
Net borrowings (repayments) under bank credit facility	727,750	(41,875)	(16,750)
Proceeds from issuance of debt	0	350,000	3,700,000
Deferred financing costs	(17,490)	(5,598)	(77,163)
Repayment of assumed debt and bridge facilities	0	(425,000)	(4,544,850)
Issuance of Class A shares	0	387,548	1,132,468
Dividends and distributions paid	(454,260)	(385,435)	(150,829)
Net cash transfers from Parent	0	0	158,822
Net cash provided by (used in) financing activities	256,000	(120,360)	201,698
Cash and cash equivalents
Net (decrease) increase for the period	(199,905)	(100,770)	360,492
Balance, beginning of period	259,722	360,492	0
Balance, end of period	59,817	259,722	360,492
Supplemental cash flow disclosures
Interest paid	199,429	176,033	82,880
Non-cash investing and financing activities
Non-Normal Tenant Improvements by Tenant	19,316	52,995	72,402
Accrual of dividend and distribution payable to Class A shareholders and Operating Partnership unit holders	119,055	111,733	94,109
MGP Operating Partnership | MGM National Harbor Transaction
Non-cash investing and financing activities
Net assets acquired	0	721,409	0
MGP Operating Partnership | Borgata Transaction
Non-cash investing and financing activities
Net assets acquired	$ 0	$ 0	$ 1,273,230

Combined and Consolidated Sta_4

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	Total Class A Shareholders' Equity	Noncontrolling Interest
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	(84,383)					(84,383)	(84,383)
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)
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	35,346
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	(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	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]
Net income	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	(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
Net income	244,702			67,065			67,065	177,637
Other comprehensive income - cash flow hedges	4,128				1,100		1,100	3,028
Share-based compensation	2,093		558				558	1,535
Deemed contribution - tax sharing agreement	5,745							5,745
Dividends and distributions declared	(461,582)			(123,025)			(123,025)	(338,557)
Other	(17,319)		(4,377)				(4,377)	(12,942)
Balance at Dec. 31, 2018	5,845,506	$ 0	$ 1,712,671	$ (150,908)	$ 4,208	$ 0	$ 1,565,971	$ 4,279,535
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest and additional paid-in capital	$ 4,279,535

Combined and Consolidated Sta_5

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]
Noncontrolling interest and additional paid-in capital	$ 6,058,959
Beginning balance at Dec. 31, 2015		$ 6,058,959	$ 6,058,959	$ 0	$ 0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	(84,383)	(84,383)	(84,383)
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
Beginning balance at Dec. 31, 2015		6,058,959	6,058,959	0	0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	35,346	35,346
Purchase of OP 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
Dividends and distributions declared		(244,938)			(244,938)
Ending balance at Dec. 31, 2016		5,608,261	0	0	5,608,261
Increase (Decrease) in Partners' Capital [Roll Forward]
Noncontrolling interest and additional paid-in capital		0	(3,868,078)		3,868,078
Net income	119,729	119,729			119,729
Ending balance at Dec. 31, 2016		5,608,261	0	0	5,608,261
Increase (Decrease) in Partners' Capital [Roll Forward]
Noncontrolling interest and additional paid-in capital	5,608,261
Net income	165,990	165,990			165,990
Purchase of OP 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
Dividends and distributions declared		(403,059)			(403,059)
Partners' Capital, 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]
Noncontrolling interest and additional paid-in capital	6,067,739
Net income	244,702	244,702			244,702
Assumption of bridge facilities from MGM		(4,000,000)
Other comprehensive income - cash flow hedges	4,128	4,128			4,128
Share-based compensation		2,093			2,093
Deemed contribution - tax sharing agreement	5,745	5,745			5,745
Dividends and distributions declared		(461,582)			(461,582)
Partners' Capital, Other		(17,319)			(17,319)
Ending balance at Dec. 31, 2018	5,845,506	$ 5,845,506	$ 0	$ 0	$ 5,845,506
Increase (Decrease) in Partners' Capital [Roll Forward]
Noncontrolling interest and additional paid-in capital	$ 5,845,506

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Northfield Acquisition. As discussed in Note 1, on July 6, 2018 the TRS completed its acquisition of 100% of the membership interests of Northfield for a purchase price of approximately $1.1 billion . The Company funded the acquisition through a $200 million draw on the term loan A facility and a $655 million draw under the revolving credit facility, with the remainder of the purchase price paid with cash on hand. The acquisition will expand MGP’s real estate assets and diversify MGP’s geographic reach. The Company recognized 100% of the assets and liabilities of Northfield at fair value at the date of the acquisition. Under the acquisition method, the fair value was allocated to the assets acquired and liabilities assumed in the transaction. The allocation of fair value for substantially all of the assets and liabilities is preliminary and may be adjusted up to one year after the acquisition. Specifically, as of December 31, 2018, the Company is finalizing valuation work related to the asset classes that comprise the property and equipment acquired. The following table sets forth the preliminary purchase price allocation at July 6, 2018 (in thousands): Fair value of assets acquired and liabilities: Property and equipment used in operations $ 792,807 Cash and cash equivalents 35,831 Racing and gaming licenses 228,000 Customer list 25,000 Goodwill 17,915 Other assets 9,598 Other liabilities (38,786 ) $ 1,070,365 As discussed above, the Company recognized the identifiable intangible assets at fair value. The estimated fair values of the intangible assets were preliminarily determined using methodologies under the income approach based on significant inputs that were not observable. The goodwill is primarily attributable to the synergies expected to arise after the acquisition. Consolidated results. For the period from July 6, 2018 through December 31, 2018 , Northfield’s net revenue was $132.9 million and operating income and net income were both $33.0 million . Pro forma information (unaudited). The operating results for Northfield are included in the accompanying consolidated statements of operations from the date of acquisition. The following unaudited pro forma consolidated financial information for the Company has been prepared assuming the Northfield Acquisition had occurred as of January 1, 2017. The unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated as of January 1, 2017. The pro forma results include adjustments related to purchase accounting, primarily interest expense related to debt used to fund the acquisition, and the conformance of accounting policies. The following table represents MGP's and the Operating Partnership’s unaudited pro forma information for the years ended December 31, 2018 and 2017: 2018 2017 (unaudited, in thousands, except per share amounts) Net revenues $ 1,142,045 $ 1,016,040 Net income 259,427 166,365 Net income attributable to Class A shareholders 70,990 41,875 Basic net income per Class A share 1.00 0.68 Diluted net income per Class A share 1.00 0.68 As discussed in Note 1, on September 18, 2018, the Company entered into an agreement to sell the operations of Northfield to a subsidiary of MGM for approximately $275 million , subject to customary purchase price adjustments. The TRS will concurrently liquidate and the real estate assets of Northfield will be transferred to the Landlord. The Landlord will lease such real estate assets to the Tenant pursuant to an amendment to the Master Lease. As a result, the annual rent payment will increase by $60 million , prorated for the remainder of the lease year. Consistent with the Master Lease terms, 90% of this rent will be fixed and contractually grow at 2.0% per year until 2022. The transaction is expected to close in the first half of 2019, subject to customary closing conditions. The Northfield OpCo sale will be accounted for as a transaction between entities under common control and therefore the Company will continue to carry the Northfield OpCo operating assets and liabilities as held and used until the close of the transaction. 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 7 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 7 for further discussion of the Master Lease.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
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, 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. As of December 31, 2018 , on a consolidated basis, the Landlord had total assets of $9.8 billion primarily related to its real estate assets and total liabilities of $247.5 million primarily related to its deferred revenue and above market lease liability. 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 10. 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. The contribution or acquisition of the real property by the Operating Partnership from MGM represent transactions between entities under common control, and as a result, 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 contribution or acquisition dates. 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, a deconsolidation event occurs, the Company will 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 properties, 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. Inception-to-date, Non-Normal Tenant Improvements were $144.7 million through December 31, 2018 . Property and Equipment used in operations. Property and equipment used in operations are stated at cost. The property and equipment used in operations was acquired through the Northfield Acquisition and therefore recognized at fair value at the acquisition date. The Company evaluates its property and equipment, real estate investments, and other long-lived assets for impairment based on its classification as held for sale or to be held and used. Several criteria must be met before an asset is classified as held for sale, including that management with the appropriate authority commits to a plan to sell the asset to a third-party at a reasonable price in relation to its fair value and is actively seeking a buyer. For assets held for sale, the Company recognizes the asset at the lower of carrying value or fair market value less costs to sell, as estimated based on comparable asset sales, offers received, or a discounted cash flow model. For assets to be held and used, the Company reviews for impairment whenever indicators of impairment exist. The Company then compares the estimated future cash flows of the asset, on an undiscounted basis, to the carrying value of the asset. If the undiscounted cash flows exceed the carrying value, no impairment is indicated. If the undiscounted cash flows do not exceed the carrying value, then an impairment charge is recorded based on the fair value of the asset, typically measured using a discounted cash flow model. All recognized impairment losses, whether for assets held for sale or assets to be held and used, are recorded as operating expenses. There were no impairment charges related to long lived assets recognized during the years ended December 31, 2018 , 2017 , and, 2016 . Depreciation and property transactions. Depreciation expense is recognized over the useful lives of real estate investments and property and equipment used in operations applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and 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. 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. Northfield generates gaming, food, beverage and other revenue, which primarily consists of video lottery terminal (“VLT ” ) wager transactions and food and beverage transactions. The transaction price for a VLT wager is the difference between gaming wins and losses (net win). The Company accounts for VLT revenue on a portfolio basis given the similar characteristics of wagers by recognizing net win per gaming day versus on an individual wager basis. The transaction price of food and beverage contracts is the amount collected from customer or stand-alone selling price for such goods and services and is recorded when the delivery is made. Sales and usage-based taxes are excluded from revenues. Deferred revenue. The Company receives nonmonetary consideration related to Non-Normal Tenant Improvements as they become MGP’s property pursuant to the Master Lease and 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 and amortizes the deferred revenue as additional rental revenue over the remaining term of the Master Lease once the related real estate assets are placed in service. Goodwill and other intangible assets. Goodwill represents the excess of purchase price over fair market value of net assets acquired in business combinations. Goodwill and indefinite-lived intangible assets must be reviewed for impairment at least annually and between annual test dates in certain circumstances. The Company performs its annual impairment tests in the fourth quarter of each fiscal year. No impairments were indicated or recorded as a result of the annual impairment review for goodwill and indefinite-lived intangible assets in 2018 . Accounting guidance provides entities the option to perform a qualitative assessment of goodwill and indefinite-lived intangible assets (commonly referred to as step zero) in order to determine whether further impairment testing is necessary. In performing the step zero analysis the Company considers macroeconomic conditions, industry and market considerations, current and forecasted financial performance, entity-specific events, and changes in the composition or carrying amount of net assets of reporting units for goodwill. In addition, the Company takes into consideration the amount of excess of fair value over carrying value determined in the last quantitative analysis that was performed, as well as the period of time that has passed since the last quantitative analysis. If the step zero analysis indicates that it is more likely than not that the fair value is less than its carrying amount, the entity would proceed to a quantitative analysis. Under the quantitative analysis, goodwill for relevant reporting units is tested for impairment using a discounted cash flow analysis based on the estimated future results of the Company’s reporting units discounted using market discount rates and market indicators of terminal year capitalization rates, and a market approach that utilizes business enterprise value multiples based on a range of multiples from the Company’s peer group. An impairment charge is recognized for the amount by which the carrying value exceeds the reporting unit’s fair value, not to exceed the total amount of goodwill allocated to that reporting unit. Under the qualitative analysis, the license rights are tested for impairment using a discounted cash flow approach. If the fair value of an indefinite-lived intangible asset is less than its carrying amount, an impairment loss is recognized equal to the difference. 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 completed or announced 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 primarily includes the salaries and benefits of employees and external consulting costs. In addition, pursuant to a corporate services agreement 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 years ended December 31, 2018 and 2017 of $1.9 million and $1.6 million , respectively. 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 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. 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 gain or loss on the hedge instruments as a component of accumulated other comprehensive income. Fair value measurements . Fair value measurements are utilized in the accounting impairment assessments of the Company's long-lived assets, assets acquired and liabilities assumed in a business combination, and goodwill and other intangible assets. Fair value measurements also affect the Company's accounting for certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs. The Company used the following inputs in its fair value measurements: • Level 2 inputs for its long-term debt fair value disclosures. See Note 8; • Level 2 inputs when measuring the fair value of its interest rate swaps. See Note 9; and • Level 2 and Level 3 inputs when assessing the fair value of assets acquired and liabilities assumed during the Northfield acquisition. See Note 3. 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. Concentrations of credit risk. Substantially all of the Company’s real estate properties have been leased to a wholly owned subsidiary of MGM, and 87% of the Company’s revenues for the period ending December 31, 2018 are derived from the Master Lease. All of the Company's revenues for the period ending December 31, 2017 and 2016 were derived from the Master Lease. Management does not believe there are any other significant concentrations of credit risk. Geographical risk. A significant number 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 January 2017, FASB issued Accounting Standards Update (“ASU”) No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating step two from the goodwill impairment test. Under the amended guidance, the Company will perform its annual goodwill impairment tests (and interim tests if any are determined to be necessary) by comparing the fair value of its reporting units with their carrying value, and an impairment charge, if any, will be recognized for the amount by which the carrying value exceeds the reporting unit’s fair value, not to exceed the total amount of goodwill allocated to that reporting unit. The Company early adopted ASU 2017-04 and it did not have a material effect on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU 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 early adopted ASU 2017-12 and it did not have a material impact on its consolidated financial statements and footnote disclosures. In February 2018, the FASB issued ASC 842 “Leases (Topic 842),” which replaces the existing guidance in ASC 840, “Leases,” (“ASC 842”). ASC 842 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. ASC 842 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 will recognize interest expense and amortization of the ROU asset and for operating leases the lessee will recognize a straight-line total lease expense. The Company will adopt ASC 842 on January 1, 2019, utilizing the simplified transition method and accordingly will not recast comparative period financial information. The Company will elect the package of practical expedients available under ASC 842, which includes that the Company need not reassess the lease classification for existing contracts. Accordingly, the Master Lease will continue to be classified as an operating lease. ASC 842 requires lessors to exclude from variable payments, and therefore from revenue, lessor costs paid by lessees directly to third parties. Under the Master Lease, the lessee pays property tax and insurance directly to third parties; accordingly, the Company will no longer reflect such costs as “Tenant reimbursements” within revenues or “Reimbursable expenses” within expenses. The Company is also a lessee in lease arrangements for which the most material leases are ground leases that will continue to be classified as operating leases. 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.

Business

Business	12 Months Ended
	Dec. 31, 2018
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 in October 2015. MGP conducts its operations through MGM Growth Properties Operating Partnership LP (the “Operating Partnership”), a Delaware limited partnership that was formed in January 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, Park MGM (which was branded as Monte Carlo prior to May 2018), 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 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 57.5 million of its Class A shares representing limited liability company interests. 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. 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. As discussed in Note 3 and Note 11, the Operating Partnership issued additional Operating Partnership units in connection with the Borgata Transaction, follow-on public offerings of Class A shares and the MGM National Harbor Transaction. As of December 31, 2018 , there were approximately 266.0 million Operating Partnership units outstanding in the Operating Partnership of which MGM owned approximately 195.1 million Operating Partnership units or 73.3% of the Operating Partnership units in the Operating Partnership. MGP owns the remaining 26.7% 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. One of the Company's wholly-owned taxable REIT subsidiaries (“TRS”), MGP OH, Inc. owns the Hard Rock Rocksino Northfield Park (the “Rocksino”) in Northfield, Ohio. A wholly owned subsidiary of the Operating Partnership (the “Landlord”) leases all of its real estate properties, other than Northfield, back to a wholly owned subsidiary of MGM (the “Tenant”) under a master lease agreement (the “Master Lease”). Northfield Acquisition On July 6, 2018, the TRS completed its previously announced acquisition of the membership interests of Northfield Park Associates, LLC (“Northfield”), an Ohio limited liability company that owns the real estate assets and operations of the Rocksino (the “Northfield Acquisition”) from Milstein Entertainment LLC. Simultaneously with the close of the transaction, Northfield entered into a new agreement with an affiliate of Hard Rock Café International (STP), Inc. (“Hard Rock”) to continue to serve as the manager of the property. Refer to Note 2 and Note 3 for additional details. On September 18, 2018, the Company entered into an agreement to sell the operations of Northfield (“Northfield OpCo”) to a subsidiary of MGM. Northfield will be added to the existing Master Lease between the Landlord and Tenant. The transaction is expected to close in the first half of 2019, subject to customary closing conditions. Refer to Note 3 for additional information. Empire City Transaction On January 29, 2019, the Company acquired the real property associated with the Empire City Casino’s race track and casino (“Empire City”) from MGM upon its acquisition of Empire City for fair value of consideration transferred of approximately $634 million , which included the assumption of approximately $246 million of debt by the Operating Partnership with the balance through the issuance of 12.9 million Operating Partnership units to MGM (“Empire City Transaction”). Empire City was added to the existing Master Lease between the Landlord and Tenant. As a result, the annual rent payment to MGP increased by $50 million , prorated for the remainder of the lease year. Consistent with the Master Lease terms, 90% of this rent will be fixed and contractually grow at 2% per year until 2022. In addition, pursuant to the Master Lease, MGP has a right of first offer with respect to certain undeveloped land adjacent to the property to the extent MGM develops additional gaming facilities and chooses to sell or transfer the property in the future. Park MGM Lease Transaction On December 20, 2018, the Company entered into a definitive agreement with MGM whereby the Company will pay MGM consideration of $637.5 million for renovations undertaken by MGM regarding the Park MGM and NoMad Las Vegas property (the “Park MGM Lease Transaction”). Additionally, at closing the parties will enter into an amendment to the Master Lease whereby the annual rent payment to the Company will increase by $50.0 million , prorated for the remainder of the lease year. Consistent with the Master Lease terms, 90% of this rent will be fixed and contractually grow at 2% per year until 2022. The transaction is expected to close in the first quarter of 2019 and is subject to customary closing conditions. Segments The Company has two reportable segments: REIT and TRS. See Note 15 for additional information about the Company's segments.

Real Estate Investments

Real Estate Investments	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
REAL ESTATE INVESTMENTS	REAL ESTATE INVESTMENTS The carrying value of real estate investments is as follows: December 31, 2018 2017 (in thousands) Land $ 4,143,513 $ 4,143,513 Buildings, building improvements, land improvements and integral equipment 8,405,479 8,512,334 12,548,992 12,655,847 Less: Accumulated depreciation (2,806,767 ) (2,633,909 ) $ 9,742,225 $ 10,021,938

Property and Equipment used in

Property and Equipment used in Operations (Notes)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property and equipment used in operations	PROPERTY AND EQUIPMENT USED IN OPERATIONS The carrying value of property and equipment used in operations of the TRS is as follows: 2018 (in thousands) Land $ 392,500 Buildings, building improvements and land improvements 382,843 Furniture, fixtures and equipment 18,770 794,113 Less: Accumulated depreciation (9,818 ) $ 784,295

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and other intangible assets	GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and other intangible assets consisted of the following: 2018 (in thousands) Goodwill $ 17,915 Indefinite-lived intangible assets: Racing and gaming licenses 228,000 Total indefinite-lived intangible assets 228,000 Finite-lived intangible assets: Customer lists 25,000 Less: Accumulated amortization (1,786 ) 23,214 Total finite-lived intangible assets, net 23,214 Total other intangible assets, net $ 251,214 Goodwill. A summary of changes in the Company’s goodwill by reportable segment is as follows: 2018 Balance at January 1 Acquisitions Balance at December 31 (in thousands) Goodwill, net by reportable segment: TRS $ — $ 17,915 $ 17,915 Other intangible assets, net. The Company recognized an indefinite-lived intangible asset for the racing and gaming licenses acquired in the Northfield Acquisition and recognized an intangible asset related to Northfield’s customer list, which is amortized on a straight-line basis over its estimated useful life of 7 years . Total amortization expense related to intangible assets was $1.8 million for the year ending December 31, 2018 . Remaining estimated future amortization is as follows: (in thousands) Years ending December 31, 2019 $ 3,571 2020 3,571 2021 3,571 2022 3,571 2023 3,571 Thereafter 5,359 $ 23,214

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2018
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. The Operating Partnership is party to interest rate swaps to mitigate the interest rate risk inherent in its senior secured term loan B facility. As of December 31, 2018 and 2017 , the Operating Partnership 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, and mature in November 2021. In December 2018, the Operating Partnership entered into additional interest rate swaps that have a notional amount of $400 million on which it will pay a fixed rate of 2.735% with the variable rate resetting monthly to the one-month LIBOR with a floor of 0% , and mature on December 31, 2024. Such interest rate swaps will become effective on December 31, 2019. As of December 31, 2018 and 2017 , all of the Operating Partnership's derivative financial instruments have been designated as cash flow hedges and qualify for hedge accounting. The fair value of these interest rate swaps were $20.5 million and $11.3 million , recorded as an asset with prepaid expenses and other assets, as of December 31, 2018 and 2017, respectively, and $5.6 million and $0 recorded as a liability within accounts payable, accrued expenses and other liabilities, as of December 31, 2018 and 2017, respectively. For the years ended December 31, 2018 and 2017 , the amount recorded in other comprehensive income related to the derivative instruments was a net gain of $4.1 million and a net gain of $9.8 million , respectively. For the years ended December 31, 2018 and 2017 , the Operating Partnership recorded interest income of $1.1 million and interest expense of $9.2 million , respectively, related to the swap agreements.

Leases

Leases	12 Months Ended
	Dec. 31, 2018
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 Springfield, which MGP may exercise should MGM elect to sell this property in the future, and with respect to any future gaming development by MGM on the undeveloped land adjacent to Empire City. In connection with the commencement of the third lease year on April 1, 2018, the base rent under the Master Lease increased to $695.8 million , resulting in total annual rent under the Master Lease of $770.3 million . Rent under the Master Lease consists of a “base rent” component and a “percentage rent” component. As of December 31, 2018 , the base rent represents approximately 90% of the rent payments due under the Master Lease and the percentage rent represents approximately 10% of the rent payments due under the Master Lease. 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 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. 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. Straight-line rental revenues from the Master Lease for the years ended December 31, 2018 and 2017 were $746.3 million and $675.1 million , respectively. The Company also recognized revenue related to tenant reimbursements and other of $123.2 million and $90.6 million for the years ended December 31, 2018 and 2017 , respectively. 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 and through August 31, 2024 as it relates to MGM National Harbor, are as follows as of December 31, 2018 : Year ending December 31, (in thousands) 2019 $ 780,782 2020 794,907 2021 809,315 2022 757,060 2023 738,435 Thereafter 1,568,769 Total $ 5,449,268 Refer to Note 1 and Note 3 for transactions that have been entered into but not yet occurred as of December 31, 2018 .

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	DEBT Debt consists of the following: December 31, 2018 2017 (in thousands) Senior secured credit facility: Senior secured term loan A facility $ 470,000 $ 273,750 Senior secured term loan B facility 1,799,125 1,817,625 Senior secured revolving credit facility 550,000 — $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 350,000 350,000 4,719,125 3,991,375 Less: Unamortized discount and debt issuance costs (52,176 ) (56,747 ) $ 4,666,949 $ 3,934,628 Operating Partnership credit agreement. At December 31, 2018 , the Operating Partnership senior credit facility consisted of a $470 million term loan A facility, a $1.8 billion term loan B facility, and a $1.4 billion revolving credit facility. In March 2018, the Operating Partnership repriced its term loan B interest rate to LIBOR plus 2.00% and extended the maturity of the term loan B facility to March 2025, which became effective in August 2018. In addition, the Operating Partnership will receive a further reduction in pricing to LIBOR plus 1.75% upon a corporate rating upgrade by either S&P or Moody's. In June 2018, the Operating Partnership amended its credit agreement to provide for a $750 million increase of the revolving facility to $1.4 billion , a $200 million increase on the term loan A facility, and extension of the maturities of the revolving facility and the term loan A facility to June 2023. Additionally, the revolving and term loan A facilities were repriced to LIBOR plus 1.75% to 2.25% determined by reference to the total net leverage ratio pricing grid. In addition, amortization payments under the term loan A facility will start on the last business day of each calendar quarter beginning September 30, 2019, for an amount equal to 0.625% of the aggregate principal amount of the term loan A outstanding as of the amendment effective date. Prior to the amendment, the term loan A facility was subject to amortization in equal quarterly installments of 2.5% of the initial aggregate principal amount to be payable each year. The Operating Partnership permanently repaid $3.8 million of the term loan A facility for the year ended December 31, 2018 . The term loan B facility is subject to equal quarterly installments of 1.0% of the initial aggregate principal amount each year. The Operating Partnership permanently repaid $18.5 million of the term loan B facility in the year ended December 31, 2018 in accordance with the scheduled amortization. As of December 31, 2018 , $550.0 million was drawn on the revolving credit facility. At December 31, 2018 , the interest rate on the term loan A facility was 4.52% , the interest rate on the term loan B facility was 4.52% and the interest rate on the revolver facility was 4.43% . See Note 9 for further discussion of the Operating Partnership's interest rate swap agreements related to the term loan B facility. No letters of credit were outstanding under the Operating Partnership senior credit facility at December 31, 2018 . The credit agreement contains customary representations and warranties, events of default and positive and negative covenants. The revolving credit facility and term loan A facility also require that the Operating Partnership 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. The Operating Partnership was in compliance with its financial covenants at December 31, 2018 . 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, including mortgages on its real estate, excluding the real estate assets of MGM National Harbor and Empire City, and subject to other customary exclusions. Operating Partnership senior notes. In April 2016, the Operating Partnership issued $1.05 billion in aggregate principal amount of 5.625% senior notes due 2024. 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. In August 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. In September 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. Subsequent to year end, in January 2019, the Operating Partnership issued $750 million in aggregate principal amount of 5.75% senior notes due 2027. The senior notes will mature on February 1, 2027. Interest on the senior notes is payable on February 1 and August 1 of each year, commencing on August 1, 2019. 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 Operating Partnership's debt as of December 31, 2018 are as follows: Year ending December 31, (in thousands) 2019 $ 24,375 2020 30,250 2021 30,250 2022 30,250 2023 997,375 Thereafter 3,606,625 $ 4,719,125 Fair value of long-term debt. The estimated fair value of the Operating Partnership's long-term debt was $4.5 billion and $4.1 billion at December 31, 2018 and 2017 , respectively. Fair value was estimated using quoted market prices for the Operating Partnership's senior notes and senior credit facilities. Deferred financing costs. The Operating Partnership recognized non-cash interest expense related to the amortization of deferred financing costs of $12.0 million , $11.4 million and $7.2 million during the years ended December 31, 2018 , 2017 and 2016 , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
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, 2018 and expects to do so in future years. Accordingly, the accompanying combined and consolidated financial statements do not reflect a provision for federal income taxes for its REIT operations; however, the Company is subject to federal, state and local income tax on its TRS operations and may still be subject to federal excise tax, as well as certain state and local income and franchise taxes on its REIT operations. The Company’s TRS owns the real estate assets and operations of Northfield that were acquired on July 6, 2018. The Company recorded a tax provision of $3.9 million on the operations of the TRS for the year ended December 31, 2018. 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 made 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. Consequently, the Company’s accounting for the Tax Act was complete as of December 31, 2017. 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 and, accordingly, the income tax balances related to such taxes are reflected within noncontrolling interest within the accompanying financial statements. No amounts are due to MGM under the tax sharing agreement as of December 31, 2018 or December 31, 2017 . The provision for income taxes is as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Federal: Current $ — $ — $ — Deferred 3,639 — — Provision for federal income taxes $ 3,639 $ — $ — State: Current $ 5,746 $ 1,729 $ 2,156 Deferred 1,450 3,177 108 Provision for state income taxes $ 7,196 $ 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, 2018 2017 2016 Federal income tax statutory rate 21.0 % 35.0 % 35.0 % Federal valuation allowance — — — Income not subject to federal income tax (19.6 ) (35.0 ) (35.0 ) State taxes 2.8 2.9 6.0 Effective tax rate 4.2 % 2.9 % 6.0 % The major tax-effected components of the Company’s net deferred tax liability are as follows: December 31, 2018 2017 (in thousands) Deferred tax asset – federal and state Accruals, reserves and other $ 1,844 $ — Total deferred tax asset $ 1,844 $ — Deferred tax liability – federal and state Real estate investments, net $ (33,466 ) $ (28,544 ) Other intangible assets, net (2,012 ) — Total deferred tax liability (35,478 ) (28,544 ) Net deferred tax liability $ (33,634 ) $ (28,544 ) 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, 2018 or December 31, 2017 . 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, 2018 .

Shareholders' Equity and Partne

Shareholders' Equity and Partners' Capital	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
SHAREHOLDERS' EQUITY AND PARTNERS' CAPITAL	SHAREHOLDERS’ EQUITY AND PARTNERS’ CAPITAL MGP shareholders . On September 11, 2017, MGP completed an offering of 13.2 million Class A shares representing limited liability company interests in a registered public offering, including 1.7 million 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, as discussed below. Subsequent to year end, on January 31, 2019, the Company completed an offering of 19.6 million Class A shares representing limited liability company interests in a registered public offering, including 2.6 million Class A shares sold pursuant to the exercise in full by the underwriters of their over-allotment option, for net proceeds of approximately $548.4 million after deducting underwriting discounts and commissions. Operating Partnership capital. On September 11, 2017, in connection with the Company's registered offering of Class A shares, the Operating Partnership issued 13.2 million Operating Partnership units to the Company. On October 5, 2017, in connection with the MGM National Harbor Transaction, the Operating Partnership issued 9.8 million Operating Partnership units to a subsidiary of MGM. Subsequent to year end, on January 29, 2019, in connection with the Empire City Transaction, the Operating Partnership issued 12.9 million Operating Partnership units to a subsidiary of MGM. Subsequent to year end, on January 31, 2019, in connection with the Company's registered offering of Class A shares, the Operating Partnership issued 19.6 million Operating Partnership units to the Company. 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 at January 1, 2017 $ 445 Other comprehensive income before reclassifications 566 Amounts reclassified from accumulated other comprehensive income to interest expense 9,216 Other comprehensive income 9,782 Less: Other comprehensive (income) attributable to noncontrolling interest (7,119 ) Balance at December 31, 2017 3,108 Other comprehensive income before reclassifications 5,258 Amounts reclassified from accumulated other comprehensive income to interest expense (1,130 ) Other comprehensive income 4,128 Less: Other comprehensive (income) attributable to noncontrolling interest (3,028 ) Balance at December 31, 2018 $ 4,208 MGP dividends and Operating Partnership distributions. The Operating Partnership declares and pays distributions. MGP pays its dividends with the receipt of its share of the Operating Partnership's distributions. 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, 2018 through December 31, 2018 our dividend per Class A share attributable to 2018 was $1.7075 , characterized as $1.2669 ordinary dividends and $0.4406 non-dividend distributions. 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.

Net Income Per Class A Share

Net Income Per Class A Share	12 Months Ended
	Dec. 31, 2018
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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income attributable to Class A shares - basic and diluted $ 67,065 $ 41,775 $ 29,938 Denominator: Weighted average Class A shares outstanding (1) - basic 70,997,589 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 188,085 183,410 249,331 Weighted average Class A shares outstanding (1) - diluted 71,185,674 61,916,546 57,751,489 (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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income - basic and diluted $ 244,702 $ 165,990 $ 119,729 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 266,131,712 249,451,258 232,181,070 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 188,085 183,410 249,331 Weighted average Operating Partnership units outstanding (1) - diluted 266,319,797 249,634,668 232,430,401 (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, 2018
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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income attributable to Class A shares - basic and diluted $ 67,065 $ 41,775 $ 29,938 Denominator: Weighted average Class A shares outstanding (1) - basic 70,997,589 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 188,085 183,410 249,331 Weighted average Class A shares outstanding (1) - diluted 71,185,674 61,916,546 57,751,489 (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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income - basic and diluted $ 244,702 $ 165,990 $ 119,729 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 266,131,712 249,451,258 232,181,070 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 188,085 183,410 249,331 Weighted average Operating Partnership units outstanding (1) - diluted 266,319,797 249,634,668 232,430,401 (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, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Leases. The Landlord was assigned ground leases relating to Borgata, MGM National Harbor, and Beau Rivage. Such amounts will be paid by the Tenant pursuant to the Master Lease through 2046 (including renewal periods) for Borgata and National Harbor and through 2036 for Beau Rivage (the end of the lease term). At December 31, 2018 , the Company was obligated under non-cancelable operating leases to make future minimum lease payments, which primarily relate to non-cancelable minimum lease payments pursuant to the ground leases through 2070 for Borgata, through 2082 for MGM National Harbor, and through 2036 for Beau Rivage, as follows: Year ending December 31, (in thousands) 2019 $ 19,868 2020 21,113 2021 24,996 2022 25,015 2023 24,875 Thereafter 1,310,253 $ 1,426,120 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.

Segments

Segments	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
SEGMENTS	SEGMENTS Consistent with how the Company’s management reviews and assesses the Company’s financial performance, the Company and the Operating Partnership have two reportable segments, REIT and TRS. As the Company’s real estate properties, excluding Northfield, 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, this is considered the REIT reportable segment. As Northfield is the only property for which the Company owns the operations of the property in addition to the real estate assets and is organized as a taxable REIT subsidiary, this is considered the TRS reportable segment. The following tables present the Company and Operating Partnership’s segment information (in thousands) : December 31, 2018 REIT TRS Total Total revenues $ 869,495 $ 132,949 $ 1,002,444 Operating income 445,578 30,181 475,759 Income before income taxes (1) 225,356 30,181 255,537 Income tax expense 6,922 3,913 10,835 Net Income (1) 218,434 26,268 244,702 Depreciation and amortization 261,184 11,847 273,031 Interest income (1) 2,501 — 2,501 Interest expense (1) 215,532 — 215,532 Capital expenditures 192 1,386 1,578 (1) Income before income taxes, net income, interest income and interest expense are net of intercompany interest eliminations of $10.9 million for the year ended December 31, 2018 . December 31, 2018 REIT TRS Total Total assets $ 9,831,714 $ 1,119,593 $ 10,951,307 There was no TRS segment for the 2017 and 2016 periods and therefore, no tables are presented for those years.

Consolidating Financial Informa

Consolidating Financial Information	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information 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, 2018 and 2017 and for the years ended December 31, 2018 , 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. CONSOLIDATING BALANCE SHEET INFORMATION December 31, 2018 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Real estate investments, net $ 572 $ — $ 9,741,653 $ — $ 9,742,225 Property and equipment, used in operations, net — — 784,295 — 784,295 Cash and cash equivalents 3,995 — 55,822 — 59,817 Tenant and other receivables, net 26 — 14,964 — 14,990 Intercompany 841,179 — — (841,179 ) — Prepaid expenses and other assets 34,813 — 3,024 — 37,837 Investments in subsidiaries 9,790,350 — — (9,790,350 ) — Above market lease, asset — — 43,014 — 43,014 Goodwill — — 17,915 — 17,915 Other intangible assets, net — — 251,214 — 251,214 Total assets $ 10,670,935 $ — $ 10,911,901 $ (10,631,529 ) $ 10,951,307 Debt, net 4,666,949 — — — 4,666,949 Due to MGM Resorts International and affiliates 227 — 80 — 307 Intercompany — — 841,179 (841,179 ) — Accounts payable, accrued expenses, and other liabilities 13,102 — 36,500 — 49,602 Above market lease, liability — — 46,181 — 46,181 Accrued interest 26,096 — — — 26,096 Distribution payable 119,055 — — — 119,055 Deferred revenue — — 163,977 — 163,977 Deferred income taxes, net — — 33,634 — 33,634 Total liabilities 4,825,429 — 1,121,551 (841,179 ) 5,105,801 General partner — — — — — Limited partners 5,845,506 — 9,790,350 (9,790,350 ) 5,845,506 Total partners' capital 5,845,506 — 9,790,350 (9,790,350 ) 5,845,506 Total liabilities and partners' capital $ 10,670,935 $ — $ 10,911,901 $ (10,631,529 ) $ 10,951,307 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 Total assets $ 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 STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION Year Ended December 31, 2018 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Revenues Rental revenue $ — $ — $ 746,253 $ — $ 746,253 Tenant reimbursements and other — — 123,242 — 123,242 Gaming, food, beverage and other — — 132,949 — 132,949 — — 1,002,444 — 1,002,444 Expenses Gaming, food, beverage and other — — 88,053 — 88,053 Depreciation and amortization 108 — 272,923 — 273,031 Property transactions, net — — 20,319 — 20,319 Reimbursable expenses — — 119,531 — 119,531 Amortization of above market lease, net — — 686 — 686 Acquisition-related expenses 6,149 — 2,738 — 8,887 General and administrative 16,048 — 130 — 16,178 22,305 — 504,380 — 526,685 Operating income (loss) (22,305 ) — 498,064 — 475,759 Equity in earnings of subsidiaries 476,353 — — (476,353 ) — Non-operating income (expense) Interest income 13,377 — — (10,876 ) 2,501 Interest expense (215,532 ) — (10,876 ) 10,876 (215,532 ) Other non-operating (7,191 ) — — — (7,191 ) (209,346 ) — (10,876 ) — (220,222 ) Income (loss) before income taxes 244,702 — 487,188 (476,353 ) 255,537 Provision for income taxes — — (10,835 ) — (10,835 ) Net income (loss) $ 244,702 $ — $ 476,353 $ (476,353 ) $ 244,702 Other comprehensive income (loss) Net income (loss) 244,702 — 476,353 (476,353 ) 244,702 Unrealized gain on cash flow hedges 4,128 — — — 4,128 Comprehensive income (loss) $ 248,830 $ — $ 476,353 $ (476,353 ) $ 248,830 CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION Year Ended December 31, 2018 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Cash flows from operating activities Net cash provided by (used in) operating activities $ (210,132 ) $ — $ 790,339 $ — $ 580,207 Cash flows from investing activities Capital expenditures for property and equipment (192 ) — (1,386 ) — (1,578 ) Acquisition of Northfield, net of cash acquired (1,068,336 ) — 33,802 — (1,034,534 ) Net cash provided by (used in) investing activities (1,068,528 ) — 32,416 — (1,036,112 ) Cash flows from financing activities Net borrowings (repayments) under bank credit facility 727,750 — — — 727,750 Deferred financing costs (17,490 ) — — — (17,490 ) Distributions paid (454,260 ) — — — (454,260 ) Cash received by Parent on behalf of Guarantor Subsidiaries 766,933 — (766,933 ) — — Net cash provided by (used in) financing activities 1,022,933 — (766,933 ) — 256,000 Cash and cash equivalents Net increase (decrease) for the period (255,727 ) — 55,822 — (199,905 ) Balance, beginning of period 259,722 — — — 259,722 Balance, end of period $ 3,995 $ — $ 55,822 $ — $ 59,817 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 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 (used in) 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 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, 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 (used in) 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, 2018
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) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income attributable to Class A shareholders 15,830 13,146 19,484 18,605 67,065 Net income per Class A share (basic) $ 0.22 $ 0.19 $ 0.27 $ 0.26 $ 0.94 Net income per Class A share (diluted) $ 0.22 $ 0.18 $ 0.27 $ 0.26 $ 0.94 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 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 third quarter of 2018, on July 6, 2018, the TRS completed the Northfield Acquisition. As a result of this acquisition, the Company began recording revenue and incurring expenses from Northfield's operations. See Note 3 for additional detail. 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. OPERATING PARTNERSHIP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarter First Second Third Fourth Total (in thousands, except per unit data) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income per Operating Partnership unit (basic) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 Net income per Operating Partnership unit (diluted) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 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 See Note 17 for a discussion of items affecting comparability for the years ended December 31, 2018 and 2017 , which are the same for the Operating Partnership.

Operating Partnership Selected

Operating Partnership Selected Quarterly Financial Results (Unaudited)	12 Months Ended
	Dec. 31, 2018
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) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income attributable to Class A shareholders 15,830 13,146 19,484 18,605 67,065 Net income per Class A share (basic) $ 0.22 $ 0.19 $ 0.27 $ 0.26 $ 0.94 Net income per Class A share (diluted) $ 0.22 $ 0.18 $ 0.27 $ 0.26 $ 0.94 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 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 third quarter of 2018, on July 6, 2018, the TRS completed the Northfield Acquisition. As a result of this acquisition, the Company began recording revenue and incurring expenses from Northfield's operations. See Note 3 for additional detail. 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. OPERATING PARTNERSHIP SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarter First Second Third Fourth Total (in thousands, except per unit data) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income per Operating Partnership unit (basic) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 Net income per Operating Partnership unit (diluted) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 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 See Note 17 for a discussion of items affecting comparability for the years ended December 31, 2018 and 2017 , 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, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in 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, 2018 Acquisition Costs (a) Costs Capitalized Subsequent to Acquisition Gross Amount (b) Property (c) Encumbrances Land Building, Improvements and Other Land Building, Improvements and Other Land Building, Improvements and Other Total Accumulated Depreciation Year Acquired (d) Useful Life Investment Properties: New York-New York e $ 149,984 $ 484,001 $ — $ — $ 149,984 $ 484,536 $ 634,520 $ (296,527 ) 2016 f The Mirage e 1,017,562 760,222 — — 1,017,562 747,479 1,765,041 (484,617 ) 2016 f Mandalay Bay e 1,199,785 1,882,381 — — 1,199,785 1,871,540 3,071,325 (733,704 ) 2016 f Luxor e 440,685 710,796 — — 440,685 704,484 1,145,169 (350,834 ) 2016 f Excalibur e 814,805 342,685 — 43,945 814,805 384,036 1,198,841 (144,345 ) 2016 f Park MGM e 291,035 376,625 — 100,768 291,035 322,875 613,910 (87,453 ) 2016 f Beau Rivage e 104,945 561,457 — — 104,945 559,210 664,155 (258,113 ) 2016 f MGM Grand Detroit e 52,509 597,324 — — 52,509 597,324 649,833 (177,119 ) 2016 f Gold Strike Tunica e 3,609 179,146 — — 3,609 178,578 182,187 (88,475 ) 2016 f Borgata e 35,568 1,264,432 — — 35,568 1,254,782 1,290,350 (87,997 ) 2016 f MGM National Harbor — — 1,183,909 — — — 1,199,839 1,199,839 (83,837 ) 2017 f The Park e 33,026 101,353 — — 33,026 100,115 133,141 (13,638 ) 2016 f 4,143,513 8,444,331 — 144,713 4,143,513 8,404,798 12,548,311 (2,806,659 ) Corporate Property: MGP Corporate Office — 488 — 192 — 681 681 (108 ) 2017 f $ 4,143,513 $ 8,444,819 $ — $ 144,905 $ 4,143,513 $ 8,405,479 $ 12,548,992 $ (2,806,767 ) (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 2018 2017 2016 Balance at beginning of year $ 12,655,847 $ 11,468,170 $ 9,965,185 Additions (1) 19,508 1,273,776 1,511,390 Dispositions and write-offs (105,646 ) (86,905 ) (8,405 ) Other (20,717 ) 806 — Balance at end of year $ 12,548,992 $ 12,655,847 $ 11,468,170 (1) 2017 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. 2016 includes $1.3 billion resulting from the Operating Partnership's acquisition of Borgata from MGM. See “Note 3 — Acquisitions — Borgata Transaction” for additional details. Reconciliation of Accumulated Depreciation 2018 2017 2016 Balance at beginning of year $ (2,633,909 ) $ (2,388,492 ) $ (2,171,546 ) Depreciation expense (261,184 ) (260,455 ) (220,667 ) Dispositions and write-offs 85,327 52,883 3,721 Other 2,999 (37,845 ) — Balance at end of year $ (2,806,767 ) $ (2,633,909 ) $ (2,388,492 )

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
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, 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. As of December 31, 2018 , on a consolidated basis, the Landlord had total assets of $9.8 billion primarily related to its real estate assets and total liabilities of $247.5 million primarily related to its deferred revenue and above market lease liability. 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 10. 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. The contribution or acquisition of the real property by the Operating Partnership from MGM represent transactions between entities under common control, and as a result, 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 contribution or acquisition dates. 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, a deconsolidation event occurs, the Company will 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 properties, 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. Inception-to-date, Non-Normal Tenant Improvements were $144.7 million through December 31, 2018 .
Depreciation and property transactions	Property and Equipment used in operations. Property and equipment used in operations are stated at cost. The property and equipment used in operations was acquired through the Northfield Acquisition and therefore recognized at fair value at the acquisition date. The Company evaluates its property and equipment, real estate investments, and other long-lived assets for impairment based on its classification as held for sale or to be held and used. Several criteria must be met before an asset is classified as held for sale, including that management with the appropriate authority commits to a plan to sell the asset to a third-party at a reasonable price in relation to its fair value and is actively seeking a buyer. For assets held for sale, the Company recognizes the asset at the lower of carrying value or fair market value less costs to sell, as estimated based on comparable asset sales, offers received, or a discounted cash flow model. For assets to be held and used, the Company reviews for impairment whenever indicators of impairment exist. The Company then compares the estimated future cash flows of the asset, on an undiscounted basis, to the carrying value of the asset. If the undiscounted cash flows exceed the carrying value, no impairment is indicated. If the undiscounted cash flows do not exceed the carrying value, then an impairment charge is recorded based on the fair value of the asset, typically measured using a discounted cash flow model. All recognized impairment losses, whether for assets held for sale or assets to be held and used, are recorded as operating expenses. There were no impairment charges related to long lived assets recognized during the years ended December 31, 2018 , 2017 , and, 2016 . Depreciation and property transactions. Depreciation expense is recognized over the useful lives of real estate investments and property and equipment used in operations applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and 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.
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.
Deferred revenue	Deferred revenue. The Company receives nonmonetary consideration related to Non-Normal Tenant Improvements as they become MGP’s property pursuant to the Master Lease and 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 and amortizes the deferred revenue as additional rental revenue over the remaining term of the Master Lease once the related real estate assets are placed in service. 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. Northfield generates gaming, food, beverage and other revenue, which primarily consists of video lottery terminal (“VLT ” ) wager transactions and food and beverage transactions. The transaction price for a VLT wager is the difference between gaming wins and losses (net win). The Company accounts for VLT revenue on a portfolio basis given the similar characteristics of wagers by recognizing net win per gaming day versus on an individual wager basis. The transaction price of food and beverage contracts is the amount collected from customer or stand-alone selling price for such goods and services and is recorded when the delivery is made. Sales and usage-based taxes are excluded from revenues.
Goodwill and other intangible assets	Goodwill and other intangible assets. Goodwill represents the excess of purchase price over fair market value of net assets acquired in business combinations. Goodwill and indefinite-lived intangible assets must be reviewed for impairment at least annually and between annual test dates in certain circumstances. The Company performs its annual impairment tests in the fourth quarter of each fiscal year. No impairments were indicated or recorded as a result of the annual impairment review for goodwill and indefinite-lived intangible assets in 2018 . Accounting guidance provides entities the option to perform a qualitative assessment of goodwill and indefinite-lived intangible assets (commonly referred to as step zero) in order to determine whether further impairment testing is necessary. In performing the step zero analysis the Company considers macroeconomic conditions, industry and market considerations, current and forecasted financial performance, entity-specific events, and changes in the composition or carrying amount of net assets of reporting units for goodwill. In addition, the Company takes into consideration the amount of excess of fair value over carrying value determined in the last quantitative analysis that was performed, as well as the period of time that has passed since the last quantitative analysis. If the step zero analysis indicates that it is more likely than not that the fair value is less than its carrying amount, the entity would proceed to a quantitative analysis. Under the quantitative analysis, goodwill for relevant reporting units is tested for impairment using a discounted cash flow analysis based on the estimated future results of the Company’s reporting units discounted using market discount rates and market indicators of terminal year capitalization rates, and a market approach that utilizes business enterprise value multiples based on a range of multiples from the Company’s peer group. An impairment charge is recognized for the amount by which the carrying value exceeds the reporting unit’s fair value, not to exceed the total amount of goodwill allocated to that reporting unit. Under the qualitative analysis, the license rights are tested for impairment using a discounted cash flow approach. If the fair value of an indefinite-lived intangible asset is less than its carrying amount, an impairment loss is recognized equal to the difference.
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 completed or announced 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 primarily includes the salaries and benefits of employees and external consulting costs. In addition, pursuant to a corporate services agreement 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 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 gain or loss on the hedge instruments as a component of accumulated other comprehensive income.
Fair value measurements	Fair value measurements . Fair value measurements are utilized in the accounting impairment assessments of the Company's long-lived assets, assets acquired and liabilities assumed in a business combination, and goodwill and other intangible assets. Fair value measurements also affect the Company's accounting for certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs. The Company used the following inputs in its fair value measurements: • Level 2 inputs for its long-term debt fair value disclosures. See Note 8; • Level 2 inputs when measuring the fair value of its interest rate swaps. See Note 9; and • Level 2 and Level 3 inputs when assessing the fair value of assets acquired and liabilities assumed during the Northfield acquisition. See Note 3.
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.
Concentrations of credit risk	Concentrations of credit risk. Substantially all of the Company’s real estate properties have been leased to a wholly owned subsidiary of MGM, and 87% of the Company’s revenues for the period ending December 31, 2018 are derived from the Master Lease. All of the Company's revenues for the period ending December 31, 2017 and 2016 were derived from the Master Lease. Management does not believe there are any other significant concentrations of credit risk.
Geographical risk	Geographical risk. A significant number 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 January 2017, FASB issued Accounting Standards Update (“ASU”) No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating step two from the goodwill impairment test. Under the amended guidance, the Company will perform its annual goodwill impairment tests (and interim tests if any are determined to be necessary) by comparing the fair value of its reporting units with their carrying value, and an impairment charge, if any, will be recognized for the amount by which the carrying value exceeds the reporting unit’s fair value, not to exceed the total amount of goodwill allocated to that reporting unit. The Company early adopted ASU 2017-04 and it did not have a material effect on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU 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 early adopted ASU 2017-12 and it did not have a material impact on its consolidated financial statements and footnote disclosures. In February 2018, the FASB issued ASC 842 “Leases (Topic 842),” which replaces the existing guidance in ASC 840, “Leases,” (“ASC 842”). ASC 842 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. ASC 842 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 will recognize interest expense and amortization of the ROU asset and for operating leases the lessee will recognize a straight-line total lease expense. The Company will adopt ASC 842 on January 1, 2019, utilizing the simplified transition method and accordingly will not recast comparative period financial information. The Company will elect the package of practical expedients available under ASC 842, which includes that the Company need not reassess the lease classification for existing contracts. Accordingly, the Master Lease will continue to be classified as an operating lease. ASC 842 requires lessors to exclude from variable payments, and therefore from revenue, lessor costs paid by lessees directly to third parties. Under the Master Lease, the lessee pays property tax and insurance directly to third parties; accordingly, the Company will no longer reflect such costs as “Tenant reimbursements” within revenues or “Reimbursable expenses” within expenses. The Company is also a lessee in lease arrangements for which the most material leases are ground leases that will continue to be classified as operating leases. 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.

Acquisitions Acquisitions (Tabl

Acquisitions Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Fair Value of Assets Acquired and Liabilities Assumed	The following table sets forth the preliminary purchase price allocation at July 6, 2018 (in thousands): Fair value of assets acquired and liabilities: Property and equipment used in operations $ 792,807 Cash and cash equivalents 35,831 Racing and gaming licenses 228,000 Customer list 25,000 Goodwill 17,915 Other assets 9,598 Other liabilities (38,786 ) $ 1,070,365
MGP and Operating Partnership Pro Forma Information	The following table represents MGP's and the Operating Partnership’s unaudited pro forma information for the years ended December 31, 2018 and 2017: 2018 2017 (unaudited, in thousands, except per share amounts) Net revenues $ 1,142,045 $ 1,016,040 Net income 259,427 166,365 Net income attributable to Class A shareholders 70,990 41,875 Basic net income per Class A share 1.00 0.68 Diluted net income per Class A share 1.00 0.68

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Useful Lives of Property and Equipment Used in Operations	Depreciation expense is recognized over the useful lives of real estate investments and property and equipment used in operations applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and equipment 3 to 20 years The carrying value of property and equipment used in operations of the TRS is as follows: 2018 (in thousands) Land $ 392,500 Buildings, building improvements and land improvements 382,843 Furniture, fixtures and equipment 18,770 794,113 Less: Accumulated depreciation (9,818 ) $ 784,295

(Tables)

(Tables)	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Carrying Value of Real Estate Investments	The carrying value of real estate investments is as follows: December 31, 2018 2017 (in thousands) Land $ 4,143,513 $ 4,143,513 Buildings, building improvements, land improvements and integral equipment 8,405,479 8,512,334 12,548,992 12,655,847 Less: Accumulated depreciation (2,806,767 ) (2,633,909 ) $ 9,742,225 $ 10,021,938

Property and Equipment used i_2

Property and Equipment used in Operations (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property and equipment used in operations	Depreciation expense is recognized over the useful lives of real estate investments and property and equipment used in operations applying the straight-line method over the following estimated useful lives, which are periodically reviewed: Buildings and building improvements 20 to 40 years Land improvements 10 to 20 years Furniture, fixtures and equipment 3 to 20 years The carrying value of property and equipment used in operations of the TRS is as follows: 2018 (in thousands) Land $ 392,500 Buildings, building improvements and land improvements 382,843 Furniture, fixtures and equipment 18,770 794,113 Less: Accumulated depreciation (9,818 ) $ 784,295

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Composition of Goodwill and Other Intangible Assets	Goodwill and other intangible assets consisted of the following: 2018 (in thousands) Goodwill $ 17,915 Indefinite-lived intangible assets: Racing and gaming licenses 228,000 Total indefinite-lived intangible assets 228,000 Finite-lived intangible assets: Customer lists 25,000 Less: Accumulated amortization (1,786 ) 23,214 Total finite-lived intangible assets, net 23,214 Total other intangible assets, net $ 251,214
Summary of Changes in Goodwill by Reportable Segment	A summary of changes in the Company’s goodwill by reportable segment is as follows: 2018 Balance at January 1 Acquisitions Balance at December 31 (in thousands) Goodwill, net by reportable segment: TRS $ — $ 17,915 $ 17,915
Remaining Estimated Future Amortization	Total amortization expense related to intangible assets was $1.8 million for the year ending December 31, 2018 . Remaining estimated future amortization is as follows: (in thousands) Years ending December 31, 2019 $ 3,571 2020 3,571 2021 3,571 2022 3,571 2023 3,571 Thereafter 5,359 $ 23,214

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2018
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 and through August 31, 2024 as it relates to MGM National Harbor, are as follows as of December 31, 2018 : Year ending December 31, (in thousands) 2019 $ 780,782 2020 794,907 2021 809,315 2022 757,060 2023 738,435 Thereafter 1,568,769 Total $ 5,449,268

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Debt	Debt consists of the following: December 31, 2018 2017 (in thousands) Senior secured credit facility: Senior secured term loan A facility $ 470,000 $ 273,750 Senior secured term loan B facility 1,799,125 1,817,625 Senior secured revolving credit facility 550,000 — $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 350,000 350,000 4,719,125 3,991,375 Less: Unamortized discount and debt issuance costs (52,176 ) (56,747 ) $ 4,666,949 $ 3,934,628
Maturities of the Principal Amount of Debt	Maturities of the principal amount of the Operating Partnership's debt as of December 31, 2018 are as follows: Year ending December 31, (in thousands) 2019 $ 24,375 2020 30,250 2021 30,250 2022 30,250 2023 997,375 Thereafter 3,606,625 $ 4,719,125

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Provision for Income Taxes Attributable to Income (Loss) Before Income Taxes	The provision for income taxes is as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Federal: Current $ — $ — $ — Deferred 3,639 — — Provision for federal income taxes $ 3,639 $ — $ — State: Current $ 5,746 $ 1,729 $ 2,156 Deferred 1,450 3,177 108 Provision for state income taxes $ 7,196 $ 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, 2018 2017 2016 Federal income tax statutory rate 21.0 % 35.0 % 35.0 % Federal valuation allowance — — — Income not subject to federal income tax (19.6 ) (35.0 ) (35.0 ) State taxes 2.8 2.9 6.0 Effective tax rate 4.2 % 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, 2018 2017 (in thousands) Deferred tax asset – federal and state Accruals, reserves and other $ 1,844 $ — Total deferred tax asset $ 1,844 $ — Deferred tax liability – federal and state Real estate investments, net $ (33,466 ) $ (28,544 ) Other intangible assets, net (2,012 ) — Total deferred tax liability (35,478 ) (28,544 ) Net deferred tax liability $ (33,634 ) $ (28,544 )

Shareholders' Equity and Part_2

Shareholders' Equity and Partners' Capital (Tables)	12 Months Ended
	Dec. 31, 2018
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 at January 1, 2017 $ 445 Other comprehensive income before reclassifications 566 Amounts reclassified from accumulated other comprehensive income to interest expense 9,216 Other comprehensive income 9,782 Less: Other comprehensive (income) attributable to noncontrolling interest (7,119 ) Balance at December 31, 2017 3,108 Other comprehensive income before reclassifications 5,258 Amounts reclassified from accumulated other comprehensive income to interest expense (1,130 ) Other comprehensive income 4,128 Less: Other comprehensive (income) attributable to noncontrolling interest (3,028 ) Balance at December 31, 2018 $ 4,208

Net Income Per Class A Share (T

Net Income Per Class A Share (Tables)	12 Months Ended
	Dec. 31, 2018
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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income attributable to Class A shares - basic and diluted $ 67,065 $ 41,775 $ 29,938 Denominator: Weighted average Class A shares outstanding (1) - basic 70,997,589 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 188,085 183,410 249,331 Weighted average Class A shares outstanding (1) - diluted 71,185,674 61,916,546 57,751,489 (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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income - basic and diluted $ 244,702 $ 165,990 $ 119,729 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 266,131,712 249,451,258 232,181,070 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 188,085 183,410 249,331 Weighted average Operating Partnership units outstanding (1) - diluted 266,319,797 249,634,668 232,430,401 (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 Part_2

Net Income Per Operating Partnership Unit (Tables)	12 Months Ended
	Dec. 31, 2018
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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income attributable to Class A shares - basic and diluted $ 67,065 $ 41,775 $ 29,938 Denominator: Weighted average Class A shares outstanding (1) - basic 70,997,589 61,733,136 57,502,158 Effect of dilutive shares for diluted net income per Class A share (2) 188,085 183,410 249,331 Weighted average Class A shares outstanding (1) - diluted 71,185,674 61,916,546 57,751,489 (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. Years ended April 25 - December 31, 2018 2017 2016 (in thousands, except share amounts) Numerator: Net income - basic and diluted $ 244,702 $ 165,990 $ 119,729 Denominator: Weighted average Operating Partnership units outstanding (1) - basic 266,131,712 249,451,258 232,181,070 Effect of dilutive shares for diluted net income per Operating Partnership unit (2) 188,085 183,410 249,331 Weighted average Operating Partnership units outstanding (1) - diluted 266,319,797 249,634,668 232,430,401 (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, 2018
Commitments and Contingencies Disclosure [Abstract]
Noncancelable Minimum Lease Payments Pursuant to Ground Leases	At December 31, 2018 , the Company was obligated under non-cancelable operating leases to make future minimum lease payments, which primarily relate to non-cancelable minimum lease payments pursuant to the ground leases through 2070 for Borgata, through 2082 for MGM National Harbor, and through 2036 for Beau Rivage, as follows: Year ending December 31, (in thousands) 2019 $ 19,868 2020 21,113 2021 24,996 2022 25,015 2023 24,875 Thereafter 1,310,253 $ 1,426,120

Segments (Tables)

Segments (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Company's Income Statement Segment Information	The following tables present the Company and Operating Partnership’s segment information (in thousands) : December 31, 2018 REIT TRS Total Total revenues $ 869,495 $ 132,949 $ 1,002,444 Operating income 445,578 30,181 475,759 Income before income taxes (1) 225,356 30,181 255,537 Income tax expense 6,922 3,913 10,835 Net Income (1) 218,434 26,268 244,702 Depreciation and amortization 261,184 11,847 273,031 Interest income (1) 2,501 — 2,501 Interest expense (1) 215,532 — 215,532 Capital expenditures 192 1,386 1,578 (1) Income before income taxes, net income, interest income and interest expense are net of intercompany interest eliminations of $10.9 million for the year ended December 31, 2018 . December 31, 2018 REIT TRS Total Total assets $ 9,831,714 $ 1,119,593 $ 10,951,307

Consolidating Financial Infor_2

Consolidating Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Consolidating Balance Sheet Information	CONSOLIDATING BALANCE SHEET INFORMATION December 31, 2018 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Real estate investments, net $ 572 $ — $ 9,741,653 $ — $ 9,742,225 Property and equipment, used in operations, net — — 784,295 — 784,295 Cash and cash equivalents 3,995 — 55,822 — 59,817 Tenant and other receivables, net 26 — 14,964 — 14,990 Intercompany 841,179 — — (841,179 ) — Prepaid expenses and other assets 34,813 — 3,024 — 37,837 Investments in subsidiaries 9,790,350 — — (9,790,350 ) — Above market lease, asset — — 43,014 — 43,014 Goodwill — — 17,915 — 17,915 Other intangible assets, net — — 251,214 — 251,214 Total assets $ 10,670,935 $ — $ 10,911,901 $ (10,631,529 ) $ 10,951,307 Debt, net 4,666,949 — — — 4,666,949 Due to MGM Resorts International and affiliates 227 — 80 — 307 Intercompany — — 841,179 (841,179 ) — Accounts payable, accrued expenses, and other liabilities 13,102 — 36,500 — 49,602 Above market lease, liability — — 46,181 — 46,181 Accrued interest 26,096 — — — 26,096 Distribution payable 119,055 — — — 119,055 Deferred revenue — — 163,977 — 163,977 Deferred income taxes, net — — 33,634 — 33,634 Total liabilities 4,825,429 — 1,121,551 (841,179 ) 5,105,801 General partner — — — — — Limited partners 5,845,506 — 9,790,350 (9,790,350 ) 5,845,506 Total partners' capital 5,845,506 — 9,790,350 (9,790,350 ) 5,845,506 Total liabilities and partners' capital $ 10,670,935 $ — $ 10,911,901 $ (10,631,529 ) $ 10,951,307 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 Total assets $ 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 Statement of Operations and Comprehensive Income Information	CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME INFORMATION Year Ended December 31, 2018 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Revenues Rental revenue $ — $ — $ 746,253 $ — $ 746,253 Tenant reimbursements and other — — 123,242 — 123,242 Gaming, food, beverage and other — — 132,949 — 132,949 — — 1,002,444 — 1,002,444 Expenses Gaming, food, beverage and other — — 88,053 — 88,053 Depreciation and amortization 108 — 272,923 — 273,031 Property transactions, net — — 20,319 — 20,319 Reimbursable expenses — — 119,531 — 119,531 Amortization of above market lease, net — — 686 — 686 Acquisition-related expenses 6,149 — 2,738 — 8,887 General and administrative 16,048 — 130 — 16,178 22,305 — 504,380 — 526,685 Operating income (loss) (22,305 ) — 498,064 — 475,759 Equity in earnings of subsidiaries 476,353 — — (476,353 ) — Non-operating income (expense) Interest income 13,377 — — (10,876 ) 2,501 Interest expense (215,532 ) — (10,876 ) 10,876 (215,532 ) Other non-operating (7,191 ) — — — (7,191 ) (209,346 ) — (10,876 ) — (220,222 ) Income (loss) before income taxes 244,702 — 487,188 (476,353 ) 255,537 Provision for income taxes — — (10,835 ) — (10,835 ) Net income (loss) $ 244,702 $ — $ 476,353 $ (476,353 ) $ 244,702 Other comprehensive income (loss) Net income (loss) 244,702 — 476,353 (476,353 ) 244,702 Unrealized gain on cash flow hedges 4,128 — — — 4,128 Comprehensive income (loss) $ 248,830 $ — $ 476,353 $ (476,353 ) $ 248,830 CONSOLIDATING STATEMENT OF CASH FLOWS INFORMATION Year Ended December 31, 2018 Operating Guarantor Partnership Co-Issuer Subsidiaries Eliminations Consolidated (in thousands) Cash flows from operating activities Net cash provided by (used in) operating activities $ (210,132 ) $ — $ 790,339 $ — $ 580,207 Cash flows from investing activities Capital expenditures for property and equipment (192 ) — (1,386 ) — (1,578 ) Acquisition of Northfield, net of cash acquired (1,068,336 ) — 33,802 — (1,034,534 ) Net cash provided by (used in) investing activities (1,068,528 ) — 32,416 — (1,036,112 ) Cash flows from financing activities Net borrowings (repayments) under bank credit facility 727,750 — — — 727,750 Deferred financing costs (17,490 ) — — — (17,490 ) Distributions paid (454,260 ) — — — (454,260 ) Cash received by Parent on behalf of Guarantor Subsidiaries 766,933 — (766,933 ) — — Net cash provided by (used in) financing activities 1,022,933 — (766,933 ) — 256,000 Cash and cash equivalents Net increase (decrease) for the period (255,727 ) — 55,822 — (199,905 ) Balance, beginning of period 259,722 — — — 259,722 Balance, end of period $ 3,995 $ — $ 55,822 $ — $ 59,817 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 Cash Flows Information	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 (used in) 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 Financ_2

MGP Selected Quarterly Financial Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarter First Second Third Fourth Total (in thousands, except per share data) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income attributable to Class A shareholders 15,830 13,146 19,484 18,605 67,065 Net income per Class A share (basic) $ 0.22 $ 0.19 $ 0.27 $ 0.26 $ 0.94 Net income per Class A share (diluted) $ 0.22 $ 0.18 $ 0.27 $ 0.26 $ 0.94 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 Quarter First Second Third Fourth Total (in thousands, except per unit data) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income per Operating Partnership unit (basic) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 Net income per Operating Partnership unit (diluted) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 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

Operating Partnership Selecte_2

Operating Partnership Selected Quarterly Financial Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarter First Second Third Fourth Total (in thousands, except per share data) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income attributable to Class A shareholders 15,830 13,146 19,484 18,605 67,065 Net income per Class A share (basic) $ 0.22 $ 0.19 $ 0.27 $ 0.26 $ 0.94 Net income per Class A share (diluted) $ 0.22 $ 0.18 $ 0.27 $ 0.26 $ 0.94 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 Quarter First Second Third Fourth Total (in thousands, except per unit data) 2018 Revenues $ 215,839 $ 220,390 $ 282,221 $ 283,994 $ 1,002,444 Operating income 109,782 100,525 134,789 130,663 475,759 Net income 58,169 48,059 69,923 68,551 244,702 Net income per Operating Partnership unit (basic) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 Net income per Operating Partnership unit (diluted) $ 0.22 $ 0.18 $ 0.26 $ 0.26 $ 0.92 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

Business (Detail)

Business (Detail)	Jan. 29, 2019	Dec. 20, 2018USD ($)	May 28, 2018USD ($)	Apr. 25, 2016shares	Apr. 24, 2016USD ($)	Dec. 31, 2018USD ($)segmentshares	Dec. 31, 2017shares
Business And Organization [Line Items]
Ownership interest transferred						100.00%
Assumption of bridge facilities from MGM					$ 4,000,000,000
Ownership percentage acquired						26.70%
Rent payments percentage						90.00%
Number of Reportable Segments | segment						2
Empire City Casino
Business And Organization [Line Items]
Assumption of bridge facilities from MGM			$ 246,000,000
Consideration transferred			634,000,000
Increase In annual rent received			$ 50,000,000
Rent payments percentage			90.00%
Rent payment (percent)			2.00%
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%
Ownership percentage required for voting rights				30.00%
Operating Partnership units held (in units) | shares						195,134,123
Increase in ownership interest in operating partnership						73.30%
IPO
Business And Organization [Line Items]
Shares issued under initial public offering (in shares) | shares				57,500,000
Ownership percentage acquired				26.70%
MGP Operating Partnership
Business And Organization [Line Items]
Assumption of bridge facilities from MGM					$ 4,000,000,000	$ 4,000,000,000
Operating partnership units outstanding (in units) | shares						266,045,289	266,030,918
Subsequent Event | Empire City Casino
Business And Organization [Line Items]
Units of Partnership Interest	12.9
Park MGM Lease Transaction
Business And Organization [Line Items]
Increase In annual rent received		$ 50,000,000
Rent payments percentage		90.00%
Commitment for renovations		$ 637,500,000
Rent payment (percent)		2.00%

Acquisitions (Detail)

Acquisitions (Detail) $ / shares in Units, $ in Thousands, shares in Millions	Sep. 18, 2018USD ($)	Jul. 06, 2018USD ($)	Oct. 05, 2017USD ($)ashares	Aug. 01, 2016USD ($)shares	Dec. 31, 2018USD ($)	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)$ / shares	Dec. 31, 2016USD ($)	Apr. 01, 2018USD ($)
Business Acquisition
Goodwill					$ 17,915	$ 17,915	$ 0
Operating Lease Rent Payments percentage						90.00%
Basis spread on variable rate	2.00%
Indebtedness assumed in acquisition				$ 545,000
Cash consideration						$ 0	462,500	$ 0
Rent payments due under Master Lease			$ 756,700		770,300	770,300
Deferred tax liability					33,634	33,634	28,544
Master Lease - Base Rent
Business Acquisition
Rent payments due under Master Lease				585,000					$ 695,800
MGM National Harbor | Master Lease - Rent Increase
Business Acquisition
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
Rental revenues under Master Lease			85,500
MGM National Harbor | Master Lease - Percentage Rent Increase
Business Acquisition
Rental revenues under Master Lease			9,500
MGM National Harbor | Master Lease - Percentage Rent
Business Acquisition
Rent payments due under Master Lease			74,500
Borgata | Master Lease - Rent Increase
Business Acquisition
Rental revenues under Master Lease				100,000
Borgata | Master Lease - Base Rent Increase
Business Acquisition
Rental revenues under Master Lease				90,000
Borgata | Master Lease - Percentage Rent Increase
Business Acquisition
Rental revenues under Master Lease				10,000
Borgata | Master Lease - Percentage Rent
Business Acquisition
Rent payments due under Master Lease				$ 65,000
Northfield Park Associates, LLC
Business Acquisition
Earnings or Loss of Acquiree					33,000
Consideration transferred		$ 1,100,000
Property and equipment used in operations					792,807	792,807
Cash and cash equivalents					35,831	35,831
Racing and gaming licenses					228,000	228,000
Customer list					25,000	25,000
Goodwill					17,915	17,915
Other assets					9,598	9,598
Other liabilities					(38,786)	(38,786)
Assets Acquired Net					1,070,365	1,070,365
Revenue of Acquiree					132,900
Operating Income Of Acquiree					$ 33,000
Net revenues						1,142,045	1,016,040
Net income						259,427	166,365
Net income attributable to Class A shareholders						$ 70,990	$ 41,875
Basic net income per Class A share | $ / shares						$ 1	$ 0.68
Diluted net income per Class A share | $ / shares						$ 1	$ 0.68
MGM National Harbor Transaction
Business Acquisition
Consideration transferred			1,180,000
Indebtedness assumed in acquisition			425,000
Cash consideration			$ 462,500
Operating Partnership units issued (in units) | shares			9.8
Area of land leased | a			23
Borgata Transaction
Business Acquisition
Operating Partnership units issued (in units) | shares				27.4
Northfield Park Associates, LLC | Disposal Group, Not Discontinued Operations
Business Acquisition
Disposal Group Consideration	$ 275,000
Northfield Real Estate Leased Assets
Business Acquisition
Increase In Annual Rent Paid	$ 60,000
Senior Credit Facility Term Loan A | Secured Debt
Business Acquisition
Proceeds from Issuance of Debt		200,000
Senior secured revolving credit facility | Revolving Credit Facility
Business Acquisition
Proceeds from Issuance of Debt		$ 655,000

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Detail)	8 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2018USD ($)term	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Summary Of Significant Accounting Policies [Line Items]
Treasury yield term		10 years
Interest rate basis spread		6.00%
Non-normal tenant improvements		$ 144,700,000
Impairment charges		$ 0	$ 0	$ 0
Number of lease extension options | term		4
Additional extension period under Master Lease		5 years
Goodwill impairment loss		$ 0
Amortization of deferred financing costs		12,000,000	11,400,000	$ 7,200,000
Corporate Services Agreement
Summary Of Significant Accounting Policies [Line Items]
Expenses incurred	$ 900,000	1,900,000	$ 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		$ 9,800,000,000
Maximum exposure to loss, liabilities		$ 247,500,000
Customer Concentration Risk | Sales Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration risk (percent)		87.00%

Basis of Presentation and Sum_5

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, 2018
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
Furniture, fixtures and equipment | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	3 years
Furniture, fixtures and equipment | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Estimated useful life	20 years

Real Estate Investments (Detail

Real Estate Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real Estate Properties [Line Items]
Real estate investments, gross	$ 12,548,992	$ 12,655,847
Less: Accumulated depreciation	(2,806,767)	(2,633,909)
Real estate investments, net	9,742,225	10,021,938
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	$ 8,405,479	$ 8,512,334

Property and Equipment used i_3

Property and Equipment used in Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total PPE	$ 794,113
Less: Accumulated depreciation	(9,818)
Property, Plant and Equipment, Net	784,295	$ 0
Land
Property, Plant and Equipment [Line Items]
Total PPE	392,500
Buildings, building improvements and land improvements
Property, Plant and Equipment [Line Items]
Total PPE	382,843
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Total PPE	$ 18,770

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Composition of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	$ 17,915	$ 0
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	228,000
Finite-lived intangible assets:
Finite-lived intangible assets	23,214
Total other intangible assets, net	251,214	$ 0
Customer lists
Finite-lived intangible assets:
Finite-lived intangible assets, gross	25,000
Less: Accumulated amortization	(1,786)
Finite-lived intangible assets	23,214
Racing and gaming licenses
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	$ 228,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Changes in Goodwill by Reportable Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Changes in goodwill:
Balance at January 1	$ 0
Acquisitions	17,915
December 31, 2018	$ 17,915

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense related to intangible assets	$ 1.8
Northfield | Customer List
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life of acquired intangible asset	7 years

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Remaining Estimated Future Amortization (Details) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 3,571
2,020	3,571
2,021	3,571
2,022	3,571
2,023	3,571
Thereafter	5,359
Finite-lived intangible assets	$ 23,214

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Interest expense	$ 215,532,000	$ 184,175,000	$ 116,212,000
Gain on derivative instrument	$ 4,128,000	$ 9,782,000	$ 1,879,000
Interest Rate Swaps
Derivative [Line Items]
Average fixed interest rate	1.844%	1.844%
Notional amount	$ 1,200,000,000	$ 1,200,000,000
LIBOR floor rate	0.00%
Interest expense	$ 5,600,000	0
Gain on derivative instrument	4,100,000	9,800,000
Interest Income (Expense), Net	(1,100,000)	9,200,000
Prepaid Expenses and Other Assets | Interest Rate Swaps
Derivative [Line Items]
Derivative Asset Fair Value	20,500,000	$ 11,300,000
Designated as Hedging Instrument [Member] | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 400,000,000
Fixed Interest Rate	2.735%

Leases - Narrative (Detail)

Leases - Narrative (Detail) $ in Thousands	Oct. 05, 2017USD ($)	Aug. 01, 2016USD ($)	Dec. 31, 2018USD ($)termperiod	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 18, 2018	Apr. 01, 2018USD ($)
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		$ 770,300
Operating Lease Rent Payments percentage			90.00%
Basis spread on variable rate						2.00%
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
Rental revenue			$ 746,253	$ 675,089	$ 419,239
Master Lease
Leases [Line Items]
Initial lease term of Master Lease	10 years		10 years
Additional extension period under Master Lease			5 years
Rental revenue			$ 746,300	675,100	419,200
Base Rent
Leases [Line Items]
Rent payments due under Master Lease		$ 585,000					$ 695,800
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%
Tenant Reimbursements
Leases [Line Items]
Rental revenue			$ 123,200	$ 90,600	$ 48,300
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
Borgata | Master Lease
Leases [Line Items]
Rental revenues under Master Lease		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		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

Leases - Future Noncancelable M

Leases - Future Noncancelable Minimum Rental Payments (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 780,782
2,020	794,907
2,021	809,315
2,022	757,060
2,023	738,435
Thereafter	1,568,769
Total	$ 5,449,268

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term Debt, Fair Value	$ 4,500,000,000	$ 4,100,000,000
Long-term debt, gross	4,719,125,000	3,991,375,000
Less: Unamortized discount and debt issuance costs	(52,176,000)	(56,747,000)
Long-term debt	4,666,949,000	3,934,628,000
Senior secured term loan A facility
Debt Instrument [Line Items]
Senior secured term loan	470,000,000	273,750,000
Senior secured term loan B facility
Debt Instrument [Line Items]
Senior secured term loan	1,799,125,000	1,817,625,000
Senior secured revolving credit facility
Debt Instrument [Line Items]
Long-term debt	550,000,000	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	$ 350,000,000
Senior Notes | $1,050 million 5.625% senior notes, due 2024
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,050,000,000
Interest rate	5.625%
Senior Notes | $500 million 4.50% senior notes, due 2026
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000
Interest rate	4.50%
Senior Notes | $350 million 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350,000,000
Interest rate	4.50%

Debt - Operating Partnership Cr

Debt - Operating Partnership Credit Agreement (Detail)	1 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)	Mar. 31, 2018	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Debt, net			$ 4,666,949,000	$ 3,934,628,000
Senior secured revolving credit facility
Debt Instrument [Line Items]
Debt, net			$ 550,000,000	$ 0
Operating Partnership Credit Agreement | Senior secured term loan A facility
Debt Instrument [Line Items]
Term loan repayment percentage of initial aggregate principal amount			2.50%
Repayments of Debt			$ 3,800,000
Interest rate			4.52%
Operating Partnership Credit Agreement | Senior secured term loan B facility
Debt Instrument [Line Items]
Term loan repayment percentage of initial aggregate principal amount			1.00%
Repayments of Debt			$ 18,500,000
Interest rate			4.52%
Operating Partnership Credit Agreement | Senior secured revolving credit facility
Debt Instrument [Line Items]
Interest rate			4.43%
Secured Debt | Senior secured term loan A facility
Debt Instrument [Line Items]
Principal amount			$ 470,000,000
Credit facility amount	$ 200,000,000
Debt Instrument, Payment Terms, Percent Of Principal Due At Payment	0.00625
Secured Debt | Senior secured term loan A facility | LIBOR
Debt Instrument [Line Items]
Variable margin	2.25%
Secured Debt | Senior secured term loan B facility
Debt Instrument [Line Items]
Principal amount			1,800,000,000
Secured Debt | Senior secured term loan B facility | LIBOR
Debt Instrument [Line Items]
Variable margin		2.00%
Debt Instrument, Basis Spread On Variable Rate Upon Rating Upgrade		1.75%
Revolving Credit Facility | Senior secured revolving credit facility
Debt Instrument [Line Items]
Credit facility amount	$ 1,400,000,000		$ 1,350,000,000
Variable margin	1.75%
Line Of Credit Facility, Increase (Decrease) In Maximum Borrowing Capacity	$ 750,000,000

Debt - Operating Partnership Se

Debt - Operating Partnership Senior Notes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jan. 31, 2019	Dec. 31, 2017	Sep. 30, 2016	Aug. 31, 2016	Apr. 30, 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		$ 350,000
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%
Operating Partnership Senior Notes | $350 million 4.50% senior notes, due 2028
Debt Instrument [Line Items]
Aggregate principal amount				$ 350,000
Interest rate		5.75%		4.50%
Operating Partnership Senior Notes | $750 million 5.75% senior notes due 2027
Debt Instrument [Line Items]
Aggregate principal amount		$ 750,000

Debt - Maturities of the Princi

Debt - Maturities of the Principal Amount of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 24,375
2,020	30,250
2,021	30,250
2,022	30,250
2,023	997,375
Thereafter	3,606,625
Total	$ 4,719,125	$ 3,991,375

Debt - Fair value of long-term

Debt - Fair value of long-term debt (Details) - USD ($) $ in Billions	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Long-term Debt, Fair Value	$ 4.5	$ 4.1

Debt - Deferred financing costs

Debt - Deferred financing costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Amortization of Debt Issuance Costs and Discounts	$ 12	$ 11.4	$ 7.2

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate [Line Items]
Minimum percentage of taxable income distributed to shareholders	90.00%
Expected distribution percentage of REIT taxable income in the current taxable year	100.00%
Income tax expense	$ 10,835,000	$ 4,906,000	$ 2,264,000
Amounts due to MGM under tax sharing agreement	0	0
Uncertain tax positions	0
Interest and penalties recorded	0	$ 0
Taxable REIT subsidiaries
Real Estate [Line Items]
Income tax expense	$ 3,900,000

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal:
Current	$ 0	$ 0	$ 0
Deferred	3,639	0	0
Provision for federal income taxes	3,639	0	0
State:
Current	5,746	1,729	2,156
Deferred	1,450	3,177	108
Provision for state income taxes	$ 7,196	$ 4,906	$ 2,264

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Federal Income Tax Statutory Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal income tax statutory rate	21.00%	35.00%	35.00%
Federal valuation allowance	0.00%	0.00%	0.00%
Income not subject to federal income tax	(19.60%)	(35.00%)	(35.00%)
State taxes	2.80%	2.90%	6.00%
Effective tax rate	4.20%	2.90%	6.00%

Income Taxes - Major Tax-Effect

Income Taxes - Major Tax-Effected Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other	$ 1,844	$ 0
Deferred Tax Assets, Net	1,844	0
Deferred tax liability - federal and state
Accruals, reserves and other	(33,466)	(28,544)
Deferred Tax Liabilities, Intangible Assets	(2,012)	0
Deferred Tax Liabilities, Gross	(35,478)	(28,544)
Deferred Tax Liabilities, Net	$ (33,634)	$ (28,544)

Shareholders' Equity and Part_3

Shareholders' Equity and Partners' Capital - Narrative (Detail) - USD ($) $ / shares in Units, $ in Millions	Jan. 31, 2019	Jan. 29, 2019	Oct. 05, 2017	Sep. 11, 2017	Dec. 31, 2018	Dec. 31, 2017
Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Dividend Declared					$ 1.7075	$ 1.5297
Dividends Declared, Ordinary					1.2669	1.1542
Non-Dividend Distribution					$ 0.4406	$ 0.3755
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 | Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Number of shares offered in public offering (in shares)				1,725,000
Subsequent Event | Public Stock Offering | Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Number of shares offered in public offering (in shares)	19,550,000
Net proceeds from public offering of stock	$ 548.4
Subsequent Event | Over-Allotment Option | Class A Shares
Stockholders Equity and Partners Capital [Line Items]
Number of shares offered in public offering (in shares)	2,550,000
Subsidiaries
Stockholders Equity and Partners Capital [Line Items]
Units of Partnership Interest			9.8
Empire City Casino | Subsequent Event
Stockholders Equity and Partners Capital [Line Items]
Units of Partnership Interest		12.9

Shareholders' Equity and Part_4

Shareholders' Equity and Partners' Capital - Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 6,067,739	$ 5,608,261
Balance	5,845,506	6,067,739
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	3,108	445
Balance	4,208	3,108
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income before reclassifications	5,258	566
Amounts reclassified from accumulated other comprehensive income to interest expense	(1,130)	9,216
Less: Other comprehensive (income) attributable to noncontrolling interest	4,128	9,782
AOCI Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Less: Other comprehensive (income) attributable to noncontrolling interest	$ (3,028)	$ (7,119)

Net Income Per Class A Share (D

Net Income Per Class A Share (Detail) - USD ($) $ in Thousands	3 Months Ended								8 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net income attributable to Class A shares	$ 18,605	$ 19,484	$ 13,146	$ 15,830	$ 8,722	$ 11,025	$ 10,680	$ 11,348	$ 29,938	$ 67,065	$ 41,775
Denominator:
Basic weighted average Class A shares outstanding (in shares)									57,502,158	70,997,589	61,733,136	57,502,158
Numerator:
Net income attributable to Class A shares	$ 18,605	$ 19,484	$ 13,146	$ 15,830	$ 8,722	$ 11,025	$ 10,680	$ 11,348	$ 29,938	$ 67,065	$ 41,775
Denominator:
Effect of dilutive shares for diluted net income per Class A share (in shares)									249,331	188,085	183,410
Weighted average shares for diluted net income per Class A share (in shares)									57,751,489	71,185,674	61,916,546	57,751,489
Stock Compensation Plan
Denominator:
Potentially dilutive shares (in shares)										0

Net Income Per Operating Part_3

Net Income Per Operating Partnership Unit (Detail) - USD ($) $ in Thousands	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net income	$ 68,551	$ 69,923	$ 48,059	$ 58,169	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ (84,383)	$ 119,729	$ 244,702	$ 165,990	$ 35,346
Numerator:
Net income	68,551	69,923	48,059	58,169	31,723	43,700	43,875	46,692	(84,383)	$ 119,729	$ 244,702	$ 165,990	35,346
Denominator:
Effect of dilutive shares for diluted net income per Operating Partnership unit (in units)										249,331	188,085	183,410
Stock Compensation Plan
Denominator:
Potentially dilutive shares (in shares)											0
MGP Operating Partnership
Numerator:
Net income	68,551	69,923	48,059	58,169	31,723	43,700	43,875	46,692	(84,383)	$ 119,729	$ 244,702	$ 165,990	$ 35,346
Denominator:
Basic (in units)											266,131,712	249,451,258	232,181,070
Numerator:
Net income	$ 68,551	$ 69,923	$ 48,059	$ 58,169	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ (84,383)	$ 119,729	$ 244,702	$ 165,990	$ 35,346
Denominator:
Effect of dilutive shares for diluted net income per Operating Partnership unit (in units)										249,331	188,085	183,410
Weighted average shares for diluted net income per Operating Partnership unit (in units)											266,319,797	249,634,668	232,430,401

Commitments and Contingencies_2

Commitments and Contingencies (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 19,868
2,020	21,113
2,021	24,996
2,022	25,015
2,023	24,875
Thereafter	1,310,253
Total minimum lease payments	$ 1,426,120

Segments - Company and Operatin

Segments - Company and Operating Partnership Segment Information (Details) $ in Thousands	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Apr. 24, 2016USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2018USD ($)segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment											2
Statement of Operations
Total revenues											$ 1,002,444	$ 765,695	$ 467,548
Revenues	$ 283,994	$ 282,221	$ 220,390	$ 215,839	$ 214,542	$ 182,798	$ 184,456	$ 183,899				765,695	467,548
Operating income	130,663	134,789	100,525	109,782	81,218	89,378	90,167	92,022			475,759	352,785	153,774
Income before income taxes											255,537	170,896	37,610
Income tax expense											10,835	4,906	2,264
Net income	68,551	$ 69,923	$ 48,059	$ 58,169	31,723	$ 43,700	$ 43,875	$ 46,692	$ (84,383)	$ 119,729	244,702	165,990	35,346
Depreciation and amortization											273,031	260,455	220,667
Investment Income, Interest											2,501	3,907	774
Interest expense											215,532	184,175	116,212
Capital expenditures											1,578	488	$ 138,987
Balance Sheets
Total assets	10,951,307				$ 10,351,120						10,951,307	$ 10,351,120
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net											10,900
REIT | Operating Segments
Statement of Operations
Total revenues											869,495
Operating income											445,578
Income before income taxes											225,356
Income tax expense											6,922
Net income											218,434
Depreciation and amortization											261,184
Interest income											2,501
Interest expense											215,532
Capital expenditures											192
Balance Sheets
Total assets	9,831,714										9,831,714
TRS | Operating Segments
Statement of Operations
Total revenues											132,949
Operating income											30,181
Income before income taxes											30,181
Income tax expense											3,913
Net income											26,268
Depreciation and amortization											11,847
Interest income											0
Interest expense											0
Capital expenditures											1,386
Balance Sheets
Total assets	$ 1,119,593										$ 1,119,593

Consolidating Financial Infor_3

Consolidating Financial Information - Consolidating Balance Sheet Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Real estate investments, net	$ 9,742,225	$ 10,021,938
Property, Plant and Equipment, Net	784,295	0
Cash and cash equivalents	59,817	259,722	$ 360,492	$ 0
Tenant and other receivables, net	14,990	6,385
Intercompany	0	0
Prepaid expenses and other assets	37,837	18,487
Investments in subsidiaries	0	0
Above market lease, asset	43,014	44,588
Goodwill	17,915	0
Total assets	10,951,307	10,351,120
LIABILITIES
Debt, net	4,666,949	3,934,628
Due to MGM Resorts International and affiliates	307	962
Intercompany	0	0
Accounts payable, accrued expenses and other liabilities	49,602	10,240
Above market lease, liability	46,181	47,069
Accrued interest	26,096	22,565
Distribution payable	119,055	111,733
Deferred revenue	163,977	127,640
Deferred income taxes, net	33,634	28,544
Total liabilities	5,105,801	4,283,381
General partner	0	0
Limited partners	5,845,506	6,067,739
Total partners’ capital	5,845,506	6,067,739
Total liabilities and shareholders' equity	10,951,307	10,351,120
Eliminations
ASSETS
Real estate investments, net	0	0
Cash and cash equivalents	0	0	0	0
Tenant and other receivables, net	0	0
Intercompany	(841,179)	(1,383,397)
Prepaid expenses and other assets	0	0
Investments in subsidiaries	(9,790,350)	(8,479,388)
Above market lease, asset	0	0
Total assets	(10,631,529)	(9,862,785)
LIABILITIES
Debt, net	0	0
Due to MGM Resorts International and affiliates	0	0
Intercompany	(841,179)	(1,383,397)
Accounts payable, accrued expenses and other liabilities	0	0
Above market lease, liability	0	0
Accrued interest	0	0
Distribution payable	0	0
Deferred revenue	0	0
Deferred income taxes, net	0	0
Total liabilities	(841,179)	(1,383,397)
General partner	0	0
Limited partners	(9,790,350)	(8,479,388)
Total partners’ capital	(9,790,350)	(8,479,388)
Total liabilities and shareholders' equity	(10,631,529)	(9,862,785)
Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Real estate investments, net	9,741,653	10,021,450
Cash and cash equivalents	55,822	0	0	0
Tenant and other receivables, net	14,964	6,086
Intercompany	0	0
Prepaid expenses and other assets	3,024	0
Investments in subsidiaries	0	0
Above market lease, asset	43,014	44,588
Total assets	10,911,901	10,072,124
LIABILITIES
Debt, net	0	0
Due to MGM Resorts International and affiliates	80	0
Intercompany	841,179	1,383,397
Accounts payable, accrued expenses and other liabilities	36,500	6,086
Above market lease, liability	46,181	47,069
Accrued interest	0	0
Distribution payable	0	0
Deferred revenue	163,977	127,640
Deferred income taxes, net	33,634	28,544
Total liabilities	1,121,551	1,592,736
General partner	0	0
Limited partners	9,790,350	8,479,388
Total partners’ capital	9,790,350	8,479,388
Total liabilities and shareholders' equity	10,911,901	10,072,124
Operating Partnership
ASSETS
Real estate investments, net	9,742,225	10,021,938
Property, Plant and Equipment, Net	784,295	0
Cash and cash equivalents	59,817	259,722	360,492	0
Tenant and other receivables, net	14,990	6,385
Prepaid expenses and other assets	37,837	18,487
Above market lease, asset	43,014	44,588
Goodwill	17,915	0
Other Intangible Assets, Net	251,214	0
Total assets	10,951,307	10,351,120
LIABILITIES
Debt, net	4,666,949	3,934,628
Due to MGM Resorts International and affiliates	307	962
Accounts payable, accrued expenses and other liabilities	49,602	10,240
Above market lease, liability	46,181	47,069
Accrued interest	26,096	22,565
Distribution payable	119,055	111,733
Deferred revenue	163,977	127,640
Deferred income taxes, net	33,634	28,544
Total liabilities	5,105,801	4,283,381
General partner	0	0
Limited partners	5,845,506	6,067,739
Total partners’ capital	5,845,506	6,067,739	5,608,261	6,058,959
Total liabilities and shareholders' equity	10,951,307	10,351,120
Operating Partnership | Reportable Legal Entities
ASSETS
Real estate investments, net	572	488
Cash and cash equivalents	3,995	259,722	360,492	0
Tenant and other receivables, net	26	299
Intercompany	841,179	1,383,397
Prepaid expenses and other assets	34,813	18,487
Investments in subsidiaries	9,790,350	8,479,388
Above market lease, asset	0	0
Total assets	10,670,935	10,141,781
LIABILITIES
Debt, net	4,666,949	3,934,628
Due to MGM Resorts International and affiliates	227	962
Intercompany	0	0
Accounts payable, accrued expenses and other liabilities	13,102	4,154
Above market lease, liability	0	0
Accrued interest	26,096	22,565
Distribution payable	119,055	111,733
Deferred revenue	0	0
Deferred income taxes, net	0	0
Total liabilities	4,825,429	4,074,042
General partner	0	0
Limited partners	5,845,506	6,067,739
Total partners’ capital	5,845,506	6,067,739
Total liabilities and shareholders' equity	10,670,935	10,141,781
Operating Partnership | Eliminations
ASSETS
Property, Plant and Equipment, Net	0
Cash and cash equivalents	0	0
Goodwill	0
Other Intangible Assets, Net	0
Operating Partnership | Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Property, Plant and Equipment, Net	784,295
Cash and cash equivalents	55,822	0
Goodwill	17,915
Other Intangible Assets, Net	251,214
Operating Partnership | Parent Company | Reportable Legal Entities
ASSETS
Property, Plant and Equipment, Net	0
Cash and cash equivalents	3,995	259,722
Goodwill	0
Other Intangible Assets, Net	0
Operating Partnership | Subsidiary Issuer | Reportable Legal Entities
ASSETS
Property, Plant and Equipment, Net	0
Cash and cash equivalents	0	0
Goodwill	0
Other Intangible Assets, Net	0
Co-Issuer | Reportable Legal Entities
ASSETS
Real estate investments, net	0	0
Cash and cash equivalents	0	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
Distribution 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

MGP Selected Quarterly Financ_3

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 283,994	$ 282,221	$ 220,390	$ 215,839	$ 214,542	$ 182,798	$ 184,456	$ 183,899				$ 765,695	$ 467,548
Revenue from Contract with Customer, Excluding Assessed Tax											$ 1,002,444	765,695	467,548
Operating income	130,663	134,789	100,525	109,782	81,218	89,378	90,167	92,022			475,759	352,785	153,774
Net income	68,551	69,923	48,059	58,169	31,723	43,700	43,875	46,692	$ (84,383)	$ 119,729	244,702	165,990	$ 35,346
Net income attributable to Class A shareholders	$ 18,605	$ 19,484	$ 13,146	$ 15,830	$ 8,722	$ 11,025	$ 10,680	$ 11,348		$ 29,938	$ 67,065	$ 41,775
Net income per Class A share (basic) (in dollars per share)	$ 0.26	$ 0.27	$ 0.19	$ 0.22	$ 0.12	$ 0.18	$ 0.19	$ 0.20			$ 0.94	$ 0.68	$ 0.52
Net income per Class A share (diluted) (in dollars per share)	$ 0.26	$ 0.27	$ 0.18	$ 0.22	$ 0.12	$ 0.18	$ 0.18	$ 0.20			$ 0.94	$ 0.67	$ 0.52

Consolidating Financial Infor_4

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Rental revenue											$ 746,253	$ 675,089	$ 419,239
Total revenues											1,002,444	765,695	467,548
Revenues	$ 283,994	$ 282,221	$ 220,390	$ 215,839	$ 214,542	$ 182,798	$ 184,456	$ 183,899				765,695	467,548
Expenses
Depreciation and amortization											273,031	260,455	220,667
Property transactions, net											20,319	34,022	4,684
Reimbursable expenses											119,531	88,254	68,063
Amortization of above market lease, net											686	686	286
Acquisition-related expenses											8,887	17,304	10,178
General and administrative											16,178	12,189	9,896
Expenses, net											526,685	412,910	313,774
Operating income	130,663	134,789	100,525	109,782	81,218	89,378	90,167	92,022			475,759	352,785	153,774
Equity in earnings of subsidiaries											0	0	0
Non-operating income (expense)
Interest income											2,501	3,907	774
Interest expense											(215,532)	(184,175)	(116,212)
Other non-operating											(7,191)	(1,621)	(726)
Non-operating income (expense)											(220,222)	(181,889)	(116,164)
Income before income taxes											255,537	170,896	37,610
Provision for income taxes											(10,835)	(4,906)	(2,264)
Net income	68,551	69,923	48,059	58,169	31,723	43,700	43,875	46,692	$ (84,383)	$ 119,729	244,702	165,990	35,346
Unrealized gain on cash flow hedges											4,128	9,782	1,879
Comprehensive income											248,830	175,772	37,225
Eliminations
Revenues
Rental revenue												0	0
Total revenues											0
Revenues												0	0
Expenses
Depreciation and amortization											0	0	0
Property transactions, net											0	0	0
Reimbursable expenses											0	0	0
Amortization of above market lease, net											0	0	0
Acquisition-related expenses											0	0	0
General and administrative											0	0	0
Expenses, net											0	0	0
Operating income											0	0	0
Equity in earnings of subsidiaries											(476,353)	(377,372)	(171,584)
Non-operating income (expense)
Interest income											(10,876)	0	0
Interest expense											10,876	0	0
Other non-operating											0	0	0
Non-operating income (expense)											0	0	0
Income before income taxes											(476,353)	(377,372)	(171,584)
Provision for income taxes											0	0	0
Net income											(476,353)	(377,372)	(171,584)
Unrealized gain on cash flow hedges											0	0	0
Comprehensive income											(476,353)	(377,372)	(171,584)
Guarantor Subsidiaries | Reportable Legal Entities
Revenues
Rental revenue												675,089	419,239
Total revenues											1,002,444
Revenues												765,695	467,548
Expenses
Depreciation and amortization											272,923	260,455	220,667
Property transactions, net											20,319	34,022	4,684
Reimbursable expenses											119,531	88,254	68,063
Amortization of above market lease, net											686	686	286
Acquisition-related expenses											2,738	0	0
General and administrative											130	0	0
Expenses, net											504,380	383,417	293,700
Operating income											498,064	382,278	173,848
Equity in earnings of subsidiaries											0	0	0
Non-operating income (expense)
Interest income											0	0	0
Interest expense											(10,876)	0	0
Other non-operating											0	0	0
Non-operating income (expense)											(10,876)	0	0
Income before income taxes											487,188	382,278	173,848
Provision for income taxes											(10,835)	(4,906)	(2,264)
Net income											476,353	377,372	171,584
Unrealized gain on cash flow hedges											0	0	0
Comprehensive income											476,353	377,372	171,584
Operating Partnership
Revenues
Rental revenue											746,253	675,089	419,239
Revenues	283,994	282,221	220,390	215,839	214,542	182,798	184,456	183,899			1,002,444	765,695	467,548
Expenses
Depreciation and amortization											273,031	260,455	220,667
Property transactions, net											20,319	34,022	4,684
Reimbursable expenses											119,531	88,254	68,063
Amortization of above market lease, net											686	686	286
Acquisition-related expenses											8,887	17,304	10,178
General and administrative											16,178	12,189	9,896
Expenses, net											526,685	412,910	313,774
Operating income	130,663	134,789	100,525	109,782	81,218	89,378	90,167	92,022			475,759	352,785	153,774
Non-operating income (expense)
Interest income											2,501	3,907	774
Interest expense											(215,532)	(184,175)	(116,212)
Other non-operating											(7,191)	(1,621)	(726)
Non-operating income (expense)											(220,222)	(181,889)	(116,164)
Income before income taxes											255,537	170,896	37,610
Provision for income taxes											(10,835)	(4,906)	(2,264)
Net income	$ 68,551	$ 69,923	$ 48,059	$ 58,169	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ (84,383)	$ 119,729	244,702	165,990	35,346
Unrealized gain on cash flow hedges											4,128	9,782	1,879
Comprehensive income											248,830	175,772	37,225
Operating Partnership | Reportable Legal Entities
Revenues
Rental revenue												0	0
Total revenues											0
Revenues												0	0
Expenses
Depreciation and amortization											108	0	0
Property transactions, net											0	0	0
Reimbursable expenses											0	0	0
Amortization of above market lease, net											0	0	0
Acquisition-related expenses											6,149	17,304	10,178
General and administrative											16,048	12,189	9,896
Expenses, net											22,305	29,493	20,074
Operating income											(22,305)	(29,493)	(20,074)
Equity in earnings of subsidiaries											476,353	377,372	171,584
Non-operating income (expense)
Interest income											13,377	3,907	774
Interest expense											(215,532)	(184,175)	(116,212)
Other non-operating											(7,191)	(1,621)	(726)
Non-operating income (expense)											(209,346)	(181,889)	(116,164)
Income before income taxes											244,702	165,990	35,346
Provision for income taxes											0	0	0
Net income											244,702	165,990	35,346
Unrealized gain on cash flow hedges											4,128	9,782	1,879
Comprehensive income											248,830	175,772	37,225
Co-Issuer | Reportable Legal Entities
Revenues
Rental revenue												0	0
Total revenues											0
Revenues												0	0
Expenses
Depreciation and amortization											0	0	0
Property transactions, net											0	0	0
Reimbursable expenses											0	0	0
Amortization of above market lease, net											0	0	0
Acquisition-related expenses											0	0	0
General and administrative											0	0	0
Expenses, net											0	0	0
Operating income											0	0	0
Equity in earnings of subsidiaries											0	0	0
Non-operating income (expense)
Interest income											0	0	0
Interest expense											0	0	0
Other non-operating											0	0	0
Non-operating income (expense)											0	0	0
Income before income taxes											0	0	0
Provision for income taxes											0	0	0
Net income											0	0	0
Unrealized gain on cash flow hedges											0	0	0
Comprehensive income											0	0	0
Rental Properties [Member]
Revenues
Total revenues											746,253
Rental Properties [Member] | Eliminations
Revenues
Total revenues											0
Rental Properties [Member] | Guarantor Subsidiaries | Reportable Legal Entities
Revenues
Total revenues											746,253
Rental Properties [Member] | Operating Partnership | Reportable Legal Entities
Revenues
Total revenues											0
Rental Properties [Member] | Co-Issuer | Reportable Legal Entities
Revenues
Total revenues											0
Tenant Reimbursements
Revenues
Rental revenue											123,200	90,600	48,300
Total revenues											123,242	90,606	48,309
Tenant Reimbursements | Eliminations
Revenues
Total revenues											0	0	0
Tenant Reimbursements | Guarantor Subsidiaries | Reportable Legal Entities
Revenues
Total revenues											123,242	90,606	48,309
Tenant Reimbursements | Operating Partnership
Revenues
Total revenues											123,242	90,606	48,309
Tenant Reimbursements | Operating Partnership | Reportable Legal Entities
Revenues
Total revenues											0	0	0
Tenant Reimbursements | Co-Issuer | Reportable Legal Entities
Revenues
Total revenues											0	0	0
Gaming, food, beverage and other
Revenues
Total revenues											132,949	0	0
Cost of Revenue											88,053	0	0
Gaming, food, beverage and other | Eliminations
Revenues
Total revenues											0
Cost of Revenue											0
Gaming, food, beverage and other | Guarantor Subsidiaries | Reportable Legal Entities
Revenues
Total revenues											132,949
Cost of Revenue											88,053
Gaming, food, beverage and other | Operating Partnership
Revenues
Total revenues											132,949	0	0
Cost of Revenue											88,053	$ 0	$ 0
Gaming, food, beverage and other | Operating Partnership | Reportable Legal Entities
Revenues
Total revenues											0
Cost of Revenue											0
Gaming, food, beverage and other | Co-Issuer | Reportable Legal Entities
Revenues
Total revenues											0
Cost of Revenue											$ 0

MGP Selected Quarterly Financ_4

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

Consolidating Financial Infor_5

Consolidating Financial Information - Consolidating Statement of Cash Flows Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net cash provided by (used in) operating activities	$ 580,207	$ 482,578	$ 297,781
Cash flows from investing activities
Capital expenditures for property and equipment	(1,578)	(488)	(138,987)
MGM National Harbor Transaction	0	(462,500)	0
Net cash used in investing activities	(1,036,112)	(462,988)	(138,987)
Cash flows from financing activities
Proceeds from issuance of debt	0	350,000	3,700,000
Deferred financing costs	(17,490)	(5,598)	(77,163)
Repayment of assumed debt and bridge facilities	0	(425,000)	(4,544,850)
Repayment of debt principal		(41,875)	(16,750)
Class A share issuance costs		387,548	1,132,468
Dividends and distributions paid	(454,260)	(385,435)	(150,829)
Cash received by Parent on behalf of Guarantor Subsidiaries		0	0
Net cash transfers from Parent	0	0	158,822
Net cash provided by (used in) financing activities	256,000	(120,360)	201,698
Cash and cash equivalents
Net (decrease) increase for the period	(199,905)	(100,770)	360,492
Balance, beginning of period	259,722	360,492	0
Balance, end of period	59,817	259,722	360,492
Payments to Acquire Businesses, Net of Cash Acquired	(1,034,534)	0	0
Proceeds from (Repayments of) Lines of Credit	727,750	(41,875)	(16,750)
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
Class A share issuance costs		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 (decrease) increase for the period		0	0
Balance, beginning of period	0	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
Class A share issuance costs		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 (decrease) increase for the period		0	0
Balance, beginning of period	0	0	0
Balance, end of period	55,822	0	0
Operating Partnership
Cash flows from operating activities
Net cash provided by (used in) operating activities	580,207	482,578	297,781
Cash flows from investing activities
Capital expenditures for property and equipment	(1,578)	(488)	(138,987)
MGM National Harbor Transaction	0	(462,500)	0
Net cash used in investing activities	(1,036,112)	(462,988)	(138,987)
Cash flows from financing activities
Proceeds from issuance of debt	0	350,000	3,700,000
Deferred financing costs	(17,490)	(5,598)	(77,163)
Repayment of assumed debt and bridge facilities	0	(425,000)	(4,544,850)
Dividends and distributions paid	(454,260)	(385,435)	(150,829)
Cash received by Parent on behalf of Guarantor Subsidiaries	0
Net cash transfers from Parent	0	0	158,822
Net cash provided by (used in) financing activities	256,000	(120,360)	201,698
Cash and cash equivalents
Net (decrease) increase for the period	(199,905)	(100,770)	360,492
Balance, beginning of period	259,722	360,492	0
Balance, end of period	59,817	259,722	360,492
Payments to Acquire Businesses, Net of Cash Acquired	(1,034,534)	0	0
Proceeds from (Repayments of) Lines of Credit	727,750	(41,875)	(16,750)
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)
Class A share issuance costs		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 (decrease) increase for the period		(100,770)	360,492
Balance, beginning of period	259,722	360,492	0
Balance, end of period	3,995	259,722	360,492
Operating Partnership | Eliminations
Cash flows from operating activities
Net cash provided by (used in) operating activities	0
Cash flows from investing activities
Capital expenditures for property and equipment	0
Net cash used in investing activities	0
Cash flows from financing activities
Deferred financing costs	0
Dividends and distributions paid	0
Cash received by Parent on behalf of Guarantor Subsidiaries	0
Net cash provided by (used in) financing activities	0
Cash and cash equivalents
Net (decrease) increase for the period	0
Balance, beginning of period	0
Balance, end of period	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0
Proceeds from (Repayments of) Lines of Credit	0
Operating Partnership | Parent Company | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	(210,132)
Cash flows from investing activities
Capital expenditures for property and equipment	(192)
Net cash used in investing activities	(1,068,528)
Cash flows from financing activities
Deferred financing costs	(17,490)
Dividends and distributions paid	(454,260)
Cash received by Parent on behalf of Guarantor Subsidiaries	766,933
Net cash provided by (used in) financing activities	1,022,933
Cash and cash equivalents
Net (decrease) increase for the period	(255,727)
Balance, beginning of period	259,722
Balance, end of period	3,995	259,722
Payments to Acquire Businesses, Net of Cash Acquired	(1,068,336)
Proceeds from (Repayments of) Lines of Credit	727,750
Operating Partnership | Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	790,339
Cash flows from investing activities
Capital expenditures for property and equipment	(1,386)
Net cash used in investing activities	32,416
Cash flows from financing activities
Deferred financing costs	0
Dividends and distributions paid	0
Cash received by Parent on behalf of Guarantor Subsidiaries	(766,933)
Net cash provided by (used in) financing activities	(766,933)
Cash and cash equivalents
Net (decrease) increase for the period	55,822
Balance, beginning of period	0
Balance, end of period	55,822	0
Payments to Acquire Businesses, Net of Cash Acquired	33,802
Proceeds from (Repayments of) Lines of Credit	0
Operating Partnership | Subsidiary Issuer | Reportable Legal Entities
Cash flows from operating activities
Net cash provided by (used in) operating activities	0
Cash flows from investing activities
Capital expenditures for property and equipment	0
Net cash used in investing activities	0
Cash flows from financing activities
Deferred financing costs	0
Dividends and distributions paid	0
Cash received by Parent on behalf of Guarantor Subsidiaries	0
Net cash provided by (used in) financing activities	0
Cash and cash equivalents
Net (decrease) increase for the period	0
Balance, beginning of period	0
Balance, end of period	0	0
Payments to Acquire Businesses, Net of Cash Acquired	0
Proceeds from (Repayments of) Lines of Credit	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
Class A share issuance costs		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 (decrease) increase for the period		0	0
Balance, beginning of period	0	0	0
Balance, end of period	$ 0	$ 0	$ 0

Operating Partnership Selecte_3

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Apr. 24, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 283,994	$ 282,221	$ 220,390	$ 215,839	$ 214,542	$ 182,798	$ 184,456	$ 183,899				$ 765,695	$ 467,548
Operating income	130,663	134,789	100,525	109,782	81,218	89,378	90,167	92,022			$ 475,759	352,785	153,774
Net income	68,551	69,923	48,059	58,169	31,723	43,700	43,875	46,692	$ (84,383)	$ 119,729	244,702	165,990	35,346
MGP Operating Partnership
Segment Reporting Information [Line Items]
Revenues	283,994	282,221	220,390	215,839	214,542	182,798	184,456	183,899			1,002,444	765,695	467,548
Operating income	130,663	134,789	100,525	109,782	81,218	89,378	90,167	92,022			475,759	352,785	153,774
Net income	$ 68,551	$ 69,923	$ 48,059	$ 58,169	$ 31,723	$ 43,700	$ 43,875	$ 46,692	$ (84,383)	$ 119,729	$ 244,702	$ 165,990	$ 35,346
Net income per Operating Partnership unit (basic in dollars per share)	$ 0.26	$ 0.26	$ 0.18	$ 0.22	$ 0.12	$ 0.18	$ 0.18	$ 0.19			$ 0.92	$ 0.67	$ 0.52
Net income per Operating Partnership unit (diluted in dollars per share)	$ 0.26	$ 0.26	$ 0.18	$ 0.22	$ 0.12	$ 0.18	$ 0.18	$ 0.19			$ 0.92	$ 0.66	$ 0.52

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation - Summary of Real Estate Properties (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Acquisition Costs
Land	$ 4,143,513
Building, Improvements and Other	8,444,819
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	144,905
Gross Amount at Which Carried at Close of Period
Land	4,143,513
Building, Improvements and Other	8,405,479
Total	12,548,992	$ 12,655,847	$ 11,468,170	$ 9,965,185
Accumulated Depreciation	(2,806,767)	$ (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, Improvements and Other	8,444,331
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	144,713
Gross Amount at Which Carried at Close of Period
Land	4,143,513
Building, Improvements and Other	8,404,798
Total	12,548,311
Accumulated Depreciation	(2,806,659)
New York-New York | Investment Properties
Acquisition Costs
Land	149,984
Building, Improvements and Other	484,001
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	149,984
Building, Improvements and Other	484,536
Total	634,520
Accumulated Depreciation	(296,527)
The Mirage | Investment Properties
Acquisition Costs
Land	1,017,562
Building, Improvements and Other	760,222
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	1,017,562
Building, Improvements and Other	747,479
Total	1,765,041
Accumulated Depreciation	(484,617)
Mandalay Bay | Investment Properties
Acquisition Costs
Land	1,199,785
Building, Improvements and Other	1,882,381
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	1,199,785
Building, Improvements and Other	1,871,540
Total	3,071,325
Accumulated Depreciation	(733,704)
Luxor | Investment Properties
Acquisition Costs
Land	440,685
Building, Improvements and Other	710,796
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	440,685
Building, Improvements and Other	704,484
Total	1,145,169
Accumulated Depreciation	(350,834)
Excalibur | Investment Properties
Acquisition Costs
Land	814,805
Building, Improvements and Other	342,685
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	43,945
Gross Amount at Which Carried at Close of Period
Land	814,805
Building, Improvements and Other	384,036
Total	1,198,841
Accumulated Depreciation	(144,345)
Park MGM | Investment Properties
Acquisition Costs
Land	291,035
Building, Improvements and Other	376,625
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	100,768
Gross Amount at Which Carried at Close of Period
Land	291,035
Building, Improvements and Other	322,875
Total	613,910
Accumulated Depreciation	(87,453)
Park MGM | Investment Properties
Acquisition Costs
Land	104,945
Building, Improvements and Other	561,457
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	104,945
Building, Improvements and Other	559,210
Total	664,155
Accumulated Depreciation	(258,113)
MGM Grand Detroit | Investment Properties
Acquisition Costs
Land	52,509
Building, Improvements and Other	597,324
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	52,509
Building, Improvements and Other	597,324
Total	649,833
Accumulated Depreciation	(177,119)
Gold Strike Tunica | Investment Properties
Acquisition Costs
Land	3,609
Building, Improvements and Other	179,146
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	3,609
Building, Improvements and Other	178,578
Total	182,187
Accumulated Depreciation	(88,475)
Borgata | Investment Properties
Acquisition Costs
Land	35,568
Building, Improvements and Other	1,264,432
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	35,568
Building, Improvements and Other	1,254,782
Total	1,290,350
Accumulated Depreciation	(87,997)
MGM National Harbor | Investment Properties
Acquisition Costs
Land	0
Building, Improvements and Other	1,183,909
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	0
Building, Improvements and Other	1,199,839
Total	1,199,839
Accumulated Depreciation	(83,837)
Borgata | Investment Properties
Acquisition Costs
Land	33,026
Building, Improvements and Other	101,353
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	0
Gross Amount at Which Carried at Close of Period
Land	33,026
Building, Improvements and Other	100,115
Total	133,141
Accumulated Depreciation	(13,638)
MGP Corporate Office | Corporate Property
Acquisition Costs
Land	0
Building, Improvements and Other	488
Costs Capitalized Subsequent to Acquisition
Land	0
Building, Improvements and Other	192
Gross Amount at Which Carried at Close of Period
Land	0
Building, Improvements and Other	681
Total	681
Accumulated Depreciation	$ (108)

Schedule III - Real Estate an_3

Schedule III - Real Estate and Accumulated Depreciation - Summary of Depreciable Lives (Detail)	12 Months Ended
	Dec. 31, 2018
Buildings and building improvements | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years
Buildings and building improvements | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	40 years
Land improvements | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	10 years
Land improvements | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years
Fixtures and integral equipment | Minimum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	3 years
Fixtures and integral equipment | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Depreciable lives	20 years

Schedule III - Real Estate an_4

Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Real Estate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Balance at beginning of year	$ 12,655,847	$ 11,468,170	$ 9,965,185
Additions	19,508	1,273,776	1,511,390
Dispositions and write-offs	(105,646)	(86,905)	(8,405)
Other	(20,717)	806	0
Balance at end of year	$ 12,548,992	12,655,847	11,468,170
MGM National Harbor Transaction
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Additions		$ 1,200,000
Borgata
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Additions			$ 1,300,000

Schedule III - Real Estate an_5

Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Balance at beginning of year	$ (2,633,909)	$ (2,388,492)	$ (2,171,546)
Depreciation expense	(261,184)	(260,455)	(220,667)
Dispositions and write-offs	85,327	52,883	3,721
Other	(2,999)	37,845	0
Balance at end of year	$ (2,806,767)	$ (2,633,909)	$ (2,388,492)