Annual report pursuant to Section 13 and 15(d)

Credit Facility, Notes Payable and Derivative Instruments - Derivative Instruments (Details)

v3.20.4
Credit Facility, Notes Payable and Derivative Instruments - Derivative Instruments (Details)
$ in Millions
Dec. 31, 2020
USD ($)
item
Interest Rate Swap [Member]  
Debt Instrument [Line Items]  
Derivative, Number of Instruments Held | item 6
Derivative, Fixed Interest Rate 1.91%
Derivative, Notional Amount $ 350
Wells Fargo Bank, N.A [Member] | Interest Rate Swap Agreement With Interest Rate 0.158 Percent Maturing August 2023 [Member]  
Debt Instrument [Line Items]  
Derivative, Fixed Interest Rate 0.16%
Derivative, Notional Amount $ 50
BMO Harris Bank N.A. [Member] | Interest Rate Swap Agreement with Interest Rate 2.88 Percent Maturing August 2023 [Member]  
Debt Instrument [Line Items]  
Derivative, Fixed Interest Rate 2.88%
Derivative, Notional Amount $ 100
BMO Harris Bank N.A. [Member] | Interest Rate Swap Agreement with Interest Rate 1.21 Percent Maturing August 2024 [Member]  
Debt Instrument [Line Items]  
Derivative, Fixed Interest Rate 1.21%
Derivative, Notional Amount $ 90
Truist Bank [Member] | Interest Rate Swap Agreement with Interest Rate 1.21 Percent Maturing August 2024 [Member]  
Debt Instrument [Line Items]  
Derivative, Fixed Interest Rate 1.21%
Derivative, Notional Amount $ 40
Truist Bank [Member] | Interest Rate Swap Agreement with Interest Rate 2.93 Percent Maturing August 2024 [Member]  
Debt Instrument [Line Items]  
Derivative, Fixed Interest Rate 2.93%
Derivative, Notional Amount $ 40
Citizens Bank National Association [Member] | Interest Rate Swap Agreement with Interest Rate 2.93 Percent Maturing August 2024 [Member]  
Debt Instrument [Line Items]  
Derivative, Fixed Interest Rate 2.93%
Derivative, Notional Amount $ 30