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UNSECURED BANK CREDIT FACILITIES (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) basisPoints Integer | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items] |  |  |
Unsecured bank credit facilities - variable rate, carrying amount | $ (1,520,000) | $ 168,454,000 |
Unamortized debt issuance costs | (1,520,000) | (1,546,000) |
Line of Credit Facility, Maximum Borrowing Capacity | $ 675,000,000 | $ 475,000,000 |
Weighted average interest rates (in hundredths) | 5.68% | 2.32% | 1.01%
Average bank borrowings | $ 0 | $ 170,000,000 |
Amortization of facility fees | 1,005,000 | 713,000 | $ 751,000
Amortization of Debt Issuance Costs | 1,943,000 | 1,357,000 | 1,296,000
Average bank borrowings | 49,384,000 | 182,478,000 | 95,629,000
Working Cash Line of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Unsecured bank credit facilities - variable rate, carrying amount | 0 |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 50,000,000 | 50,000,000 |
Line of Credit Facility, Expiration Date | Jul. 30, 2025 |  |
Credit facility, extension option | two six-month extensions |  |
Line of Credit Facility, Interest Rate at Period End | 6.255% |  |
Debt Instrument, Covenant Description | Although the Company’s current credit rating is Baa2, given the strength of the Company’s key credit metrics, initial pricing for the credit facilities is based on the BBB+/Baa1 credit ratings level. This favorable pricing level will be retained provided that the Company’s consolidated leverage ratio, as defined in the applicable agreements, remains less than 32.5% |  |
Amortization of Debt Issuance Costs | $ 1,003,000 | 650,000 | $ 606,000
Debt Instrument, Covenant Compliance | The Company’s unsecured bank credit facilities have certain restrictive covenants, such as maintaining minimum debt service coverage and leverage ratios and maintaining insurance coverage, and the Company was in compliance with all of its financial debt covenants at December 31, 2023 |  |
Basis spread | basisPoints | 77.5 |  |
Line of credit, facility fee (in basis points) | basisPoints | 15 |  |
Revolving Credit Facility |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 625,000,000 | $ 425,000,000 |
Increase in maximum borrowing capacity | $ 200,000,000 |  |
Banks included in the unsecured revolving credit facility group | Integer | 11 |  |
Credit facility, extension option | two six-month extensions |  |
Line of Credit Facility, Interest Rate at Period End | 6.13% |  |
Letters of Credit Outstanding, Amount | $ 2,655,000 |  |
Debt Instrument, Maturity Date | Jul. 30, 2025 |  |
Line of credit facility, accordion | $ 125,000,000 |  |
Sustainability-linked pricing component, interest margin reduction (in basis points) | 1 |  |
Basis spread | basisPoints | 76.5 |  |
Line of credit, facility fee (in basis points) | basisPoints | 15 |  |

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- Definition The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 35 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481655/310-20-35-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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