Mortgage Notes, Term Loans, and Revolving Credit Facilities - Summary of Mortgage Notes, Term Loans, and Revolving Credit Facilities Secured by Company's Properties (Details) - USD ($)	6 Months Ended
Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Weighted Average Interest Rate	4.08%
Principal Balance Outstanding	$ 4,523,498,000	$ 2,125,825,000
Deferred financing costs, net	(31,854,000)	(16,075,000)
Premium on assumed debt, net	1,935,000	1,541,000
Mortgage notes, term loans, and revolving credit facilities, net	4,493,579,000	2,111,291,000
Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	3,626,067,000	1,468,294,000
Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 897,431,000	$ 657,531,000
Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Sep. 19, 2024
Weighted Average [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	4.08%
Weighted Average Maturity Date	May 04, 2025
Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	4.06%
Weighted Average Maturity Date	Mar. 18, 2022
One-Month LIBOR [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.10%	1.60%
Mortgage Notes [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 3,426,067,000	$ 1,468,294,000
Mortgage Notes [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 63,600,000	63,600,000
Mortgage Notes [Member] \| Weighted Average [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.98%
Weighted Average Maturity Date	May 06, 2025
Mortgage Notes [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	May 09, 2022
Mortgage Notes [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.18%
Canyon Industrial Portfolio [Member] \| Mezzanine Loan [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	5.85%
Principal Balance Outstanding	$ 200,000,000
Canyon Industrial Portfolio [Member] \| Mezzanine Loan [Member] \| Weighted Average [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Apr. 05, 2025
BAML Industrial Properties [Member] \| Term Loan [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 236,000,000	186,000,000
BAML Industrial Properties [Member] \| Term Loan [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Jun. 01, 2022
BAML Industrial Properties [Member] \| Term Loan [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.00%
BAML Industrial Properties [Member] \| Revolving Credit Facility [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Maximum Facility Size	$ 236,000,000
Principal Balance Outstanding	$ 217,000,000	186,000,000
BAML Industrial Properties [Member] \| Revolving Credit Facility [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Jun. 01, 2022
BAML Industrial Properties [Member] \| Revolving Credit Facility [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.00%
Citi Industrial Properties \| Revolving Credit Facility [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Maximum Facility Size	$ 300,000,000
Principal Balance Outstanding	$ 178,831,000	178,831,000
Citi Industrial Properties \| Revolving Credit Facility [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Oct. 26, 2020
Citi Industrial Properties \| Revolving Credit Facility [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.25%
Capital One Industrial Properties [Member] \| Term Loan [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding	$ 101,000,000	22,500,000
Capital One Industrial Properties [Member] \| Term Loan [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Dec. 12, 2022
Capital One Industrial Properties [Member] \| Term Loan [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.60%
Capital One Industrial Properties [Member] \| Revolving Credit Facility [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Maximum Facility Size	$ 101,000,000
Principal Balance Outstanding	$ 101,000,000	$ 20,600,000
Capital One Industrial Properties [Member] \| Revolving Credit Facility [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Dec. 12, 2022
Capital One Industrial Properties [Member] \| Revolving Credit Facility [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.60%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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Amount, after accumulated amortization, of debt premium.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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