DEBT OBLIGATIONS - Narrative (Details)	6 Months Ended
Jun. 30, 2022 USD ($) property	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Principal balance outstanding	$ 2,042,610,000
Letters of credit outstanding	4,300,000
Line of Credit \| Term loan
Debt Instrument [Line Items]
Capitalized financing costs	2,000,000
Unsecured Debt
Debt Instrument [Line Items]
Principal balance outstanding	2,042,610,000	$ 1,851,610,000
Unsecured Debt \| Term loan
Debt Instrument [Line Items]
Principal balance outstanding	$ 250,000,000	$ 250,000,000
Spread on variable rate	1.20%
Unsecured Debt \| Term loan \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Spread on variable rate	1.20%
Unsecured Debt \| Term loan \| Minimum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Spread on variable rate	0.80%
Unsecured Debt \| Term loan \| Minimum \| Base Rate
Debt Instrument [Line Items]
Spread on variable rate	0.00%
Unsecured Debt \| Term loan \| Maximum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Spread on variable rate	1.60%
Unsecured Debt \| Term loan \| Maximum \| Base Rate
Debt Instrument [Line Items]
Spread on variable rate	0.60%
Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity (up to)	$ 50,000,000
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity (up to)	600,000,000
Capitalized financing costs	4,700,000
Line of credit facility, accordion feature	$ 500,000,000
Spread on variable rate	0.25%
Weighted average interest rate	1.72%
Interest expense	$ 1,200,000
Available borrowings under its unsecured credit facility	$ 381,700,000
Revolving Credit Facility \| Line of Credit \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Spread on variable rate	1.05%
Revolving Credit Facility \| Line of Credit \| Minimum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Spread on variable rate	0.725%
Revolving Credit Facility \| Line of Credit \| Minimum \| Base Rate
Debt Instrument [Line Items]
Spread on variable rate	0.00%
Revolving Credit Facility \| Line of Credit \| Maximum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Spread on variable rate	1.40%
Revolving Credit Facility \| Line of Credit \| Maximum \| Base Rate
Debt Instrument [Line Items]
Spread on variable rate	0.40%
Revolving Credit Facility \| Line of Credit \| 2022 Credit Facility
Debt Instrument [Line Items]
Maturity period \| property	2
Extension term	6 months
Line of credit facility covenant minimum fixed charge coverage ratio	1.5
Line of credit facility covenant maximum leverage ratio	0.60
Line of credit facility covenant maximum unsecured indebtedness to unencumbered asset value ratio	0.60
Line of credit facility covenant maximum secured indebtedness to asset value ratio	0.40
Line of credit facility covenant minimum unencumbered cash flow to interest expense on unsecured debt ratio	1.75
Line of credit facility covenant maximum percent of payments of dividends and distributions	0.95

Debt Instrument, Covenant, Interest Coverage Ratio, Minimum

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Debt Instrument, Covenant, Leverage Ratio, Maximum

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Debt Instrument, Covenant, Liquidity Ratio Required, Minimum

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Debt Instrument, Covenant, Maximum Percent Of Payments Of Dividends And Distributions

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Debt Instrument, Covenant, Maximum Secured Indebtedness To Asset Value Ratio

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- Definition

Debt Instrument, Covenant, Maximum Unsecured Indebtedness To Unencumbered Asset Value Ratio

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- Definition

Debt Instrument, Extension Term

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Debt Instrument Number Of Extensions

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- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

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No definition available.

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- Definition

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

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No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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-Name Accounting Standards Codification
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- 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.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
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- Definition

Aggregate amount of interest expense on all borrowings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

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- Definition

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

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