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Indebtedness - Additional Information (Detail)

1 Months Ended

12 Months Ended

Jul. 09, 2020

USD ($)

May 09, 2019

USD ($)

Oct. 30, 2018

USD ($)

Nov. 20, 2017

USD ($)

Feb. 28, 2019

USD ($)

Dec. 31, 2020

USD ($)

Dec. 31, 2019

USD ($)

Property

Jun. 30, 2020

Nov. 30, 2019

USD ($)

Debt Instrument [Line Items]

Deferred financing costs

$ 4,208,000

$ 5,606,000

Weighted average interest rate

2.70%

3.50%

Mortgages

Debt Instrument [Line Items]

Deferred financing costs

$ 1,275,000

$ 1,688,000

Weighted average interest rate

3.90%

3.90%

3.90%

Mortgages-Fixed Rate

Debt Instrument [Line Items]

Mortgage loan related to property disposition

$ 76,512,000

Number Of Property Dispositions | Property

3

Unsecured Credit Facility

Debt Instrument [Line Items]

Credit facility, revolving line of credit

$ 350,000,000

Credit facility borrowing capacity

$ 350,000,000

Maturity date

May 09, 2023

Unsecured revolving line of credit, option to extend additional period

6 months

Maturity term description

option to extend the revolving commitment for two additional 6-month periods under certain circumstances, including the payment of an extension fee

Deferred financing costs

$ 1,129,000

$ 1,692,000

^[1]

$ 2,336,000

^[2]

Mortgage loan related to property disposition

$ 32,117,000

Weighted average interest rate

1.60%

^[1]

3.20%

^[2]

1.60%

Unsecured Credit Facility | Key Bank Senior Facility

Debt Instrument [Line Items]

Pool of unencumbered properties occupancy level

$ 100,000,000

Unsecured Credit Facility | Minimum | 1-month LIBOR Rate

Debt Instrument [Line Items]

Debt interest rate

1.25%

Unsecured Credit Facility | Minimum | Base Rate

Debt Instrument [Line Items]

Debt interest rate

2.50%

Unsecured Credit Facility | Maximum

Debt Instrument [Line Items]

Credit facility borrowing capacity

$ 600,000,000

Unsecured Credit Facility | Maximum | 1-month LIBOR Rate

Debt Instrument [Line Items]

Debt interest rate

2.00%

Unsecured Credit Facility | Maximum | Base Rate

Debt Instrument [Line Items]

Debt interest rate

1.00%

Unsecured Term Loan

Debt Instrument [Line Items]

Credit facility borrowing capacity

$ 100,000,000

Deferred financing costs

$ 917,000

$ 257,000

Unsecured Term Loan | Minimum | LIBOR

Debt Instrument [Line Items]

Debt interest rate

1.20%

Unsecured Term Loan | Maximum | LIBOR

Debt Instrument [Line Items]

Debt interest rate

1.90%

Unsecured Term Loans

Debt Instrument [Line Items]

Credit facility borrowing capacity

$ 200,000,000

Maturity date

Jan. 17, 2024

Deferred financing costs

$ 1,241,000

$ 1,582,000

Deferred financing costs

$ 821,000

Proceeds from credit facility

$ 150,000,000

$ 50,000,000

Weighted average interest rate

1.50%

3.10%

Unsecured Term Loans | Minimum | LIBOR

Debt Instrument [Line Items]

Debt interest rate

1.20%

Unsecured Term Loans | Maximum | LIBOR

Debt Instrument [Line Items]

Debt interest rate

1.90%

[1]	The unsecured credit facility total capacity is $350,000, of which $184,802 was outstanding as of December 31, 2020.
[2]	The secured credit facility total capacity was $350,000, of which $186,302 was outstanding as of December 31, 2019.

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