Debt - Schedule of Debt Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Long-term Debt, Fiscal Year Maturity
2021	$ 1,215
2022	26,641
2023	231,758
2024	271,737
2025	351,809
Thereafter	877,802
Total	$ 1,760,962
Long-term Debt, Weighted Average Interest Rate
2021	4.08%
2022	4.81%
2023	4.10%
2024	3.83%
2025	4.00%
Thereafter	4.37%
Total	4.19%
Mortgages payable
Debt Instrument [Line Items]
Discount, net of accumulated amortization	$ (428)	$ (450)
Capitalized loan fees, net of accumulated amortization	(160)	(192)
Unsecured term loans
Debt Instrument [Line Items]
Capitalized loan fees, net of accumulated amortization	(2,105)
Unsecured notes payable
Debt Instrument [Line Items]
Discount, net of accumulated amortization	(6,044)	(6,473)
Capitalized loan fees, net of accumulated amortization	$ (6,912)	$ (7,527)
Long-term Debt, Weighted Average Interest Rate
Total	4.42%	4.42%
Consolidated indebtedness
Debt Instrument [Line Items]
Weighted average years to maturity	5 years 4 months 24 days
Fixed rate debt
Long-term Debt, Fiscal Year Maturity
2021	$ 1,215
2022	26,641
2023	231,758
2024	271,737
2025	351,809
Thereafter	877,802
Total	$ 1,760,962
Long-term Debt, Weighted Average Interest Rate
2021	4.08%
2022	4.81%
2023	4.10%
2024	3.83%
2025	4.00%
Thereafter	4.37%
Total	4.19%
Fixed rate debt \| Mortgages payable
Debt Instrument [Line Items]
Weighted average years to maturity	3 years 6 months	4 years 1 month 6 days
Long-term Debt, Fiscal Year Maturity
2021	$ 1,215
2022	26,641
2023	31,758
2024	1,737
2025	1,809
Thereafter	27,802
Total	$ 90,962	$ 92,156
Long-term Debt, Weighted Average Interest Rate
Total	4.37%	4.36%
Fixed rate debt \| Unsecured term loans
Long-term Debt, Fiscal Year Maturity
2021	$ 0
2022	0
2023	200,000
2024	120,000
2025	0
Thereafter	150,000
Total	470,000
Fixed rate debt \| Unsecured notes payable
Long-term Debt, Fiscal Year Maturity
2021	0
2022	0
2023	0
2024	150,000
2025	350,000
Thereafter	700,000
Total	$ 1,200,000
Variable rate debt
Long-term Debt, Weighted Average Interest Rate
2021	0.00%
2022	1.20%
2023	0.00%
2024	0.00%
2025	0.00%
Thereafter	0.00%
Total	1.20%
Variable rate debt \| Unsecured revolving line of credit
Long-term Debt, Fiscal Year Maturity
2021	$ 0
2022	0
2023	0
2024	0
2025	0
Thereafter	0
Total	$ 0
4.58% Notes Due 2024 \| Unsecured notes payable
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.58%	4.58%
4.00% Notes Due 2025 \| Unsecured notes payable
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.00%	4.00%
4.08% Notes Due 2026 \| Unsecured notes payable
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.08%	4.08%
4.24% Notes Due 2028 \| Unsecured notes payable
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.24%	4.24%
4.82% Notes Due 2029 \| Unsecured notes payable
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.82%	4.82%
4.75% Notes Due 2030 \| Unsecured notes payable
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.75%	4.75%
Two $100,000 interest rate swaps maturing in 2023
Debt Instrument [Line Items]
Variable rate debt swapped to fixed rate	$ 200,000
Fixed interest rate (as a percent)	2.85%
Three $40,000 interest rate swaps maturing in 2024
Debt Instrument [Line Items]
Variable rate debt swapped to fixed rate	$ 120,000
Fixed interest rate (as a percent)	1.68%
Three $50,000 interest rate swaps maturing in 2026
Debt Instrument [Line Items]
Variable rate debt swapped to fixed rate	$ 150,000
Fixed interest rate (as a percent)	1.77%
LIBOR
Debt Instrument [Line Items]
Reference rate for variable interest rate	LIBOR
LIBOR \| Two $100,000 interest rate swaps maturing in 2023
Debt Instrument [Line Items]
Reference rate for variable interest rate	LIBOR
Variable interest rate spread (as a percent)	1.25%
LIBOR \| Three $40,000 interest rate swaps maturing in 2024
Debt Instrument [Line Items]
Reference rate for variable interest rate	LIBOR
Variable interest rate spread (as a percent)	1.20%
LIBOR \| Three $50,000 interest rate swaps maturing in 2026
Debt Instrument [Line Items]
Reference rate for variable interest rate	LIBOR
Variable interest rate spread (as a percent)	1.60%

RETAIL PROPERTIES OF AMERICA, INC. 10-Q