Consolidating Financial Information - Statement of Operations and Comprehensive Income Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues
Rental revenue	$ 163,177	$ 0
Tenant reimbursements and other	20,722	0
Revenues, net	183,899	0
Expenses
Depreciation	61,684	51,476
Property transactions, net	6,855	874
Property taxes	20,487	13,236
Amortization of above market lease, net	171	0
General and administrative	2,680	0
Expenses, net	91,877	67,970
Operating income (loss)	92,022	(67,970)
Equity in earnings of subsidiaries	0
Non-operating income (expense)
Interest income	678	0
Interest expense	(44,636)	0
Other non-operating	(134)	0
Non-operating income (expense)	(44,092)	0
Income (loss) before income taxes	47,930	(67,970)
Provision for income taxes	(1,238)	0
Net income (loss)	46,692	(67,970)
Unrealized loss on cash flow hedges, net	(634)	0
Comprehensive income (loss)	46,058	(67,970)
Eliminations
Revenues
Rental revenue	0
Tenant reimbursements and other	0
Revenues, net	0
Expenses
Depreciation	0
Property transactions, net	0
Property taxes	0
Amortization of above market lease, net	0
General and administrative	0
Expenses, net	0
Operating income (loss)	0
Equity in earnings of subsidiaries	(93,464)
Non-operating income (expense)
Interest income	0
Interest expense	0
Other non-operating	0
Non-operating income (expense)	0
Income (loss) before income taxes	(93,464)
Provision for income taxes	0
Net income (loss)	(93,464)
Unrealized loss on cash flow hedges, net	0
Comprehensive income (loss)	(93,464)
MGP Operating Partnership
Revenues
Rental revenue	163,177	0
Tenant reimbursements and other	20,722	0
Revenues, net	183,899	0
Expenses
Depreciation	61,684	51,476
Property transactions, net	6,855	874
Property taxes	20,487	13,236
Amortization of above market lease, net	171	0
General and administrative	2,680	0
Expenses, net	91,877	67,970
Operating income (loss)	92,022	(67,970)
Non-operating income (expense)
Interest income	678	0
Interest expense	(44,636)	0
Other non-operating	(134)	0
Non-operating income (expense)	(44,092)	0
Income (loss) before income taxes	47,930	(67,970)
Provision for income taxes	(1,238)	0
Net income (loss)	46,692	(67,970)
Unrealized loss on cash flow hedges, net	(634)	0
Comprehensive income (loss)	46,058	$ (67,970)
MGP Operating Partnership | Reportable Legal Entities
Revenues
Rental revenue	0
Tenant reimbursements and other	0
Revenues, net	0
Expenses
Depreciation	0
Property transactions, net	0
Property taxes	0
Amortization of above market lease, net	0
General and administrative	2,680
Expenses, net	2,680
Operating income (loss)	(2,680)
Equity in earnings of subsidiaries	93,464
Non-operating income (expense)
Interest income	678
Interest expense	(44,636)
Other non-operating	(134)
Non-operating income (expense)	(44,092)
Income (loss) before income taxes	46,692
Provision for income taxes	0
Net income (loss)	46,692
Unrealized loss on cash flow hedges, net	(634)
Comprehensive income (loss)	46,058
Co-Issuer | Reportable Legal Entities
Revenues
Rental revenue	0
Tenant reimbursements and other	0
Revenues, net	0
Expenses
Depreciation	0
Property transactions, net	0
Property taxes	0
Amortization of above market lease, net	0
General and administrative	0
Expenses, net	0
Operating income (loss)	0
Equity in earnings of subsidiaries	0
Non-operating income (expense)
Interest income	0
Interest expense	0
Other non-operating	0
Non-operating income (expense)	0
Income (loss) before income taxes	0
Provision for income taxes	0
Net income (loss)	0
Unrealized loss on cash flow hedges, net	0
Comprehensive income (loss)	0
Guarantor Subsidiaries | Reportable Legal Entities
Revenues
Rental revenue	163,177
Tenant reimbursements and other	20,722
Revenues, net	183,899
Expenses
Depreciation	61,684
Property transactions, net	6,855
Property taxes	20,487
Amortization of above market lease, net	171
General and administrative	0
Expenses, net	89,197
Operating income (loss)	94,702
Equity in earnings of subsidiaries	0
Non-operating income (expense)
Interest income	0
Interest expense	0
Other non-operating	0
Non-operating income (expense)	0
Income (loss) before income taxes	94,702
Provision for income taxes	(1,238)
Net income (loss)	93,464
Unrealized loss on cash flow hedges, net	0
Comprehensive income (loss)	$ 93,464