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Mortgage and Other Indebtedness - Additional Information (Details)			12 Months Ended
	Oct. 25, 2018 USD ($) extension	Apr. 24, 2018 USD ($) extension	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Apr. 23, 2018 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding			$ 1,200,000
Letters of credit outstanding, amount advanced			0
Value in unencumbered asset pool			1,400,000,000
Percentage bearing fixed interest, amount			847,500,000
Loan proceeds			75,000,000	$ 399,500,000	$ 97,700,000
Repayments of debt			470,500,000
Repayments of long-term debt			470,515,000	551,379,000	128,800,000
Interest costs capitalized			1,900,000	1,800,000	3,100,000
Percentage bearing variable interest, amount			305,800,000
Perimeter Woods, Killingly Commons, Fishers Station, and Whitehall Pike
Debt Instrument [Line Items]
Repayments of long-term debt			250,900,000
Kite Realty Group, LP
Debt Instrument [Line Items]
Loan proceeds			75,000,000	399,500,000	97,700,000
Repayments of long-term debt			470,515,000	551,379,000	$ 128,800,000
Three Fixed-Rate Secured Loans
Debt Instrument [Line Items]
Long-term debt, fair value			$ 864,000,000.0
Fixed Rate Debt | Minimum
Debt Instrument [Line Items]
Percentage bearing fixed interest (as percent)			3.19%
Fixed Rate Debt | Maximum
Debt Instrument [Line Items]
Percentage bearing fixed interest (as percent)			3.78%
Variable Rate Debt
Debt Instrument [Line Items]
Long-term debt, fair value			$ 307,600,000
Variable Rate Debt | Minimum
Debt Instrument [Line Items]
Percentage bearing fixed interest (as percent)			3.39%
Variable Rate Debt | Maximum
Debt Instrument [Line Items]
Percentage bearing fixed interest (as percent)			3.47%
Senior Unsecured Notes
Debt Instrument [Line Items]
Percentage bearing fixed interest, amount			$ 550,000,000
Scheduled Principal Payments
Debt Instrument [Line Items]
Repayments of long-term debt			4,100,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 600,000,000				$ 500,000,000
Line of credit, maximum amount available under option to increase		$ 1,000,000,000				$ 1,200,000,000
Number of additional extensions | extension		2
Extension period (in years)		6 months
Capitalization rate (as percent)		6.50%				6.75%
Line of credit facility, remaining borrowing capacity			583,400,000	$ 449,500,000
Loan proceeds			75,000,000.0
Repayments on credit facility			120,600,000
Borrowings to fund acquisition			30,000,000.0
Borrowings to fund development and other activities			$ 45,000,000.0
Revolving Credit Facility | Kite Realty Group, LP
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 600,000,000
Revolving Credit Facility | Swingline loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		60,000,000				$ 50,000,000
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 60,000,000				$ 50,000,000
Unsecured Debt | Term Loan Due October 2025 | Kite Realty Group, LP
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 250,000,000
Line of credit, maximum amount available under option to increase	$ 300,000,000
Number of additional extensions | extension	3
Extension period (in years)	1 year
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Percentage bearing variable interest (as percent)			1.76%	2.50%

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