Indebtedness - Additional Information (Details) - USD ($) $ in Thousands			9 Months Ended
		Jul. 15, 2020	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 1,614,277
2020 Swap
Debt Instrument [Line Items]
Debt instrument, LIBOR Rate			one-month LIBOR
Swaps, Average Fixed Interest Rate			0.42%
Unsecured Credit Facility
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs			$ 1,366	$ 2,300
Maturity Date	[1]		Oct. 29, 2021
Mortgage Loans Payable
Debt Instrument [Line Items]
Unamortized Debt Issuance Costs			$ 436	675
Extinguishment of Debt, Amount			15,115
Net carrying value of industrial properties collateralized by mortgage loans			237,939
Long-term Debt, Gross			155,706	174,360
2030 II Private Placement Notes
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 100,000	0
Interest Rate			2.74%
Effective Interest Rate			2.74%
Maturity Date			Sep. 17, 2030
2032 Private Placement Notes
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 200,000	0
Interest Rate			2.84%
Effective Interest Rate			2.84%
Maturity Date			Sep. 17, 2032
2020 Unsecured Term Loan
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 200,000	$ 200,000	$ 0
Interest Rate			3.79%
Maturity Date			Jul. 15, 2021
Incremental Term Loan Capacity		$ 100,000
Debt instrument, LIBOR Rate		LIBOR
Debt Instrument, Basis Spread		1.50%
Swaps, Average Fixed Interest Rate		2.49%

[1] The maturity date may be extended an additional year at our election, subject to certain restrictions. Amounts exclude unamortized debt issuance costs of $1,366 and $2,300 as of September 30, 2020 and December 31, 2019, respectively, which are included in the line item Prepaid Expenses and Other Assets, Net.