Amortization table period.

No definition available.

Name:	rexr_AmortizationTablePeriod
Namespace Prefix:	rexr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument term extension period.

+ References

No definition available.

+ Details

Name:	rexr_DebtInstrumentTermExtensionPeriod
Namespace Prefix:	rexr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of additional extension periods.

+ References

No definition available.

+ Details

Name:	rexr_NumberOfAdditionalExtensionPeriods
Namespace Prefix:	rexr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of properties securing loan.

+ References

No definition available.

+ Details

Name:	rexr_NumberOfPropertiesSecuringLoan
Namespace Prefix:	rexr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=rexr_GilbertLaPalmaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=rexr_FixedRateDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=rexr_A12907ImperialHighwayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=rexr_A1065E.WalnutStreetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rexr_A60MillionTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rexr_A100MillionTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rexr_A225MillionTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=rexr_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Notes Payable - Summary of Components and Significant Terms of Our Indebtedness (Detail) $ in Thousands		3 Months Ended
	Feb. 14, 2017	Mar. 31, 2017 USD ($) property swap extension	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Principal amount		$ 512,504	$ 502,476
Less: unamortized discount and deferred loan costs		(2,811)	(2,292)
Guaranteed Senior Notes
Debt Instrument [Line Items]
Principal amount		100,000	100,000
Less: unamortized discount and deferred loan costs		$ (616)	(635)
Contractual Maturity Date		Aug. 06, 2025
Stated Interest Rate		4.29%
Effective Interest Rate		4.36%
Revolving Credit Facility [Member] \| LIBOR
Debt Instrument [Line Items]
Principal amount		$ 20,000	0
Less: unamortized discount and deferred loan costs		$ 0	0
Contractual Maturity Date		Feb. 12, 2021
Description of variable rate basis		LIBOR
Basis spread on variable rate		1.10%
Effective Interest Rate		2.08%
Revolving Credit Facility [Member] \| Minimum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.10%
Revolving Credit Facility [Member] \| Maximum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%
Gilbert/La Palma(5) \| Fixed Rate Debt
Debt Instrument [Line Items]
Principal amount		$ 2,874	2,909
Less: unamortized discount and deferred loan costs		$ (143)	(145)
Contractual Maturity Date		Mar. 01, 2031
Stated Interest Rate		5.125%
Effective Interest Rate		5.40%
Amortization period		20 years
12907 Imperial Highway(6) \| Fixed Rate Debt
Debt Instrument [Line Items]
Principal amount		$ 5,152	5,182
Less: unamortized discount and deferred loan costs		$ 147	180
Contractual Maturity Date		Apr. 01, 2018
Stated Interest Rate		5.95%
Effective Interest Rate		3.44%
Amortization period		30 years
1065 Walnut Street \| Fixed Rate Debt
Debt Instrument [Line Items]
Principal amount		$ 0	9,711
Less: unamortized discount and deferred loan costs		$ 0	(192)
Contractual Maturity Date		Feb. 01, 2019
$60M Term Loan \| LIBOR
Debt Instrument [Line Items]
Description of variable rate basis		LIBOR
Basis spread on variable rate		1.90%
Number of extensions \| extension		1
Debt Instrument Term Extension Period		1 year
$60M Term Loan \| Fixed Rate Debt
Debt Instrument [Line Items]
Principal amount		$ 60,000
Amortization period		30 years
$60M Term Loan \| Fixed Rate Debt \| LIBOR
Debt Instrument [Line Items]
Principal amount		$ 59,478	59,674
Less: unamortized discount and deferred loan costs		$ (184)	(204)
Contractual Maturity Date		Aug. 01, 2019
Effective Interest Rate		3.95%
Number of properties securing loan \| property		6
Number of derivative instruments \| swap		2
$100M Term Loan Facility \| LIBOR
Debt Instrument [Line Items]
Principal amount		$ 100,000	100,000
Less: unamortized discount and deferred loan costs		$ (406)	0
Contractual Maturity Date		Feb. 14, 2022
Description of variable rate basis		LIBOR
Basis spread on variable rate		1.20%
Effective Interest Rate		3.18%
$100M Term Loan Facility \| Minimum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.20%	1.20%
Number of derivative instruments \| swap		2
$100M Term Loan Facility \| Maximum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.70%	1.70%
$225M Term Loan Facility \| Minimum \| LIBOR
Debt Instrument [Line Items]
Number of derivative instruments \| swap		2
$225M Term Loan Facility \| Term Loan \| Line of Credit \| LIBOR
Debt Instrument [Line Items]
Principal amount		$ 225,000	225,000
Less: unamortized discount and deferred loan costs		$ (1,609)	$ (1,680)
Contractual Maturity Date		Jan. 14, 2023
Description of variable rate basis		LIBOR
Basis spread on variable rate		1.60%
Effective Interest Rate		2.71%
$225M Term Loan Facility \| Term Loan \| Line of Credit \| Minimum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%
$225M Term Loan Facility \| Term Loan \| Line of Credit \| Maximum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%