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UNSECURED AND SECURED DEBT (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) basisPoints Integer | Dec. 31, 2021 USD ($) basisPoints | Dec. 31, 2020 USD ($)
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Unsecured bank credit facilities, net of debt issuance costs |  | $ 168,454,000 |  | $ 207,066,000 |
Unsecured debt - fixed rate, carrying amount |  | 1,695,000,000 |  | 1,245,000,000 |
Unsecured debt, net of debt issuance costs |  | 1,691,259,000 |  | 1,242,570,000 |
Secured debt, net of debt issuance costs |  | 2,031,000 |  | 2,142,000 |
Total debt, net of debt issuance costs |  | $ 1,861,744,000 |  | $ 1,451,778,000 |
Weighted average interest rates (in hundredths) |  | 2.32% |  | 1.01% | 1.86%
Debt assumed in the purchase of real estate, repaid promptly during the quarter with no penalty |  | $ 60,000,000 |  | $ 0 | $ 0
Payments of principal over future years [Abstract] |  |  |  |  |
Proceeds from unsecured debt |  | 525,000,000 |  | 175,000,000 | $ 275,000,000
Tulloch Corporation | 2022 Acquisitions |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt assumed in the purchase of real estate, repaid promptly during the quarter with no penalty |  | $ 60,000,000 |  |  |
Tulloch Corporation | 2022 operating properties acquired |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Number of Businesses Acquired | Integer |  | 14 |  |  |
Tulloch Corporation | 2022 development land acquisitions |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Number of land parcels acquired | Integer |  | 2 |  |  |
$75 Million Unsecured Term Loan (2015) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [1] | 1.40% |  |  |
Effective interest rate | [1] | 3.03% |  |  |
Debt Instrument, Maturity Date | [1] | Feb. 28, 2022 |  |  |
Unsecured debt - fixed rate, carrying amount | [1] | $ 0 |  | 75,000,000 |
Interest rate of term loan repaid |  | 3.03% |  |  |
Unsecured debt, carrying amount repaid |  | $ 75,000,000 |  |  |
$65 million term loan (2016) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [1] | 1.10% |  |  |
Effective interest rate | [1] | 2.31% |  |  |
Debt Instrument, Maturity Date | [1] | Apr. 01, 2023 |  |  |
Unsecured debt - fixed rate, carrying amount | [1] | $ 65,000,000 |  | 65,000,000 |
Fifty million senior unsecured notes [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.80% |  |  |
Debt Instrument, Maturity Date |  | Aug. 28, 2023 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 50,000,000 |  | 50,000,000 |
Twenty million senior unsecured notes [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.80% |  |  |
Debt Instrument, Maturity Date |  | Aug. 28, 2025 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 20,000,000 |  | 20,000,000 |
Sixty million senior unsecured notes (executed in 2017) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.46% |  |  |
Debt Instrument, Maturity Date |  | Dec. 13, 2024 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 60,000,000 |  | 60,000,000 |
Sixty million senior unsecured notes (executed in 2016) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.48% |  |  |
Debt Instrument, Maturity Date |  | Dec. 15, 2024 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 60,000,000 |  | 60,000,000 |
Forty million senior unsecured notes (executed in 2016) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.75% |  |  |
Debt Instrument, Maturity Date |  | Dec. 15, 2026 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 40,000,000 |  | 40,000,000 |
Twenty-five million senior unsecured notes (executed in 2015) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.97% |  |  |
Debt Instrument, Maturity Date |  | Oct. 01, 2025 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 25,000,000 |  | 25,000,000 |
Fifty million senior unsecured notes (executed in 2015) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.99% |  |  |
Debt Instrument, Maturity Date |  | Oct. 07, 2025 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 50,000,000 |  | 50,000,000 |
Sixty million senior unsecured notes (executed in 2018) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.93% |  |  |
Debt Instrument, Maturity Date |  | Apr. 10, 2028 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 60,000,000 |  | 60,000,000 |
$80 million senior unsecured private placement notes (2019) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 4.27% |  |  |
Debt Instrument, Maturity Date |  | Mar. 28, 2029 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 80,000,000 |  | 80,000,000 |
$35 million senior unsecured private placement notes (2019) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.54% |  |  |
Debt Instrument, Maturity Date |  | Aug. 15, 2031 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 35,000,000 |  | 35,000,000 |
$75 million senior unsecured private placement notes (2019) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.47% |  |  |
Debt Instrument, Maturity Date |  | Aug. 19, 2029 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 75,000,000 |  | $ 75,000,000 |
$100 million term loan (2019) [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [2],[3] | 0.95% |  |  |
Effective interest rate |  | 2.10% | [2],[3] | 2.75% |
Debt Instrument, Maturity Date | [2],[3] | Oct. 10, 2026 |  |  |
Unsecured debt - fixed rate, carrying amount | [2],[3] | $ 100,000,000 |  | $ 100,000,000 |
$100 million term loan (2020) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [2],[4] | 0.95% |  |  |
Effective interest rate |  | 1.80% | [2],[4] | 2.39% |
Debt Instrument, Maturity Date | [2],[4] | Mar. 25, 2027 |  |  |
Debt Instrument, Term |  | 5 years |  |  |
Unsecured debt - fixed rate, carrying amount | [2],[4] | $ 100,000,000 |  | $ 100,000,000 |
Basis point reduction in credit spread | basisPoints |  | 60 |  |  |
Debt instrument, margin (in basis points) | basisPoints |  | 95 |  |  |
Debt instrument, fixed interest rate |  | 1.80% |  |  |
$100 million senior unsecured private placement notes (2020) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 2.61% |  |  |
Debt Instrument, Maturity Date |  | Oct. 14, 2030 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 100,000,000 |  | 100,000,000 |
$75 million senior unsecured private placement notes (2020) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 2.71% |  |  |
Debt Instrument, Maturity Date |  | Oct. 14, 2032 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 75,000,000 |  | 75,000,000 |
$50 million unsecured term loan (2021) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [2],[5] | 1.10% |  |  |
Effective interest rate | [2],[5] | 1.58% |  |  |
Debt Instrument, Maturity Date | [2],[5] | Mar. 18, 2025 |  |  |
Unsecured debt - fixed rate, carrying amount | [2],[5] | $ 50,000,000 |  | 50,000,000 |
$125 million senior unsecured private placement notes (2021) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 2.74% |  |  |
Debt Instrument, Maturity Date |  | Jun. 10, 2031 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 125,000,000 |  | 125,000,000 |
$100 million senior unsecured term loan (new in 2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [2] | 1.40% |  |  |
Effective interest rate | [2] | 3.06% |  |  |
Debt Instrument, Maturity Date | [2] | Sep. 29, 2028 |  |  |
Debt Instrument, Term |  | 6 years 6 months |  |  |
Unsecured debt - fixed rate, carrying amount | [2] | $ 100,000,000 |  | 0 |
$150 million senior note (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 3.03% |  |  |
Debt Instrument, Maturity Date |  | Apr. 20, 2032 |  |  |
Debt Instrument, Term |  | 10 years |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 150,000,000 |  | 0 |
$50 million term loan (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [2] | 0.95% |  |  |
Effective interest rate | [2] | 4.09% |  |  |
Debt Instrument, Maturity Date | [2] | Aug. 30, 2024 |  |  |
Debt Instrument, Term |  | 2 years |  |  |
Unsecured debt - fixed rate, carrying amount | [2] | $ 50,000,000 |  | 0 |
$ 75 million term loan (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin | [2] | 0.95% |  |  |
Effective interest rate | [2] | 4.00% |  |  |
Debt Instrument, Maturity Date | [2] | Aug. 31, 2027 |  |  |
Debt Instrument, Term |  | 5 years |  |  |
Unsecured debt - fixed rate, carrying amount | [2] | $ 75,000,000 |  | 0 |
$75 million senior unsecured private placement notes (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 4.90% |  |  |
Debt Instrument, Maturity Date |  | Oct. 12, 2033 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 75,000,000 |  | 0 |
$75 million senior unsecured private placement notes - second tranche (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  | 4.95% |  |  |
Debt Instrument, Maturity Date |  | Oct. 12, 2034 |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 75,000,000 |  | 0 |
$125 million senior unsecured term loan (total loan with $75M and $50M tranches) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt instrument, margin |  | 0.95% |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 125,000,000 |  |  |
Sustainability-linked pricing component, interest margin reduction (in basis points) |  | 1 |  |  |
Secured and unsecured debt, net of debt issuance costs |  |  |  |  |
Payments of principal over future years [Abstract] |  |  |  |  |
2023 |  | $ 115,119,000 |  |  |
2024 |  | 170,122,000 |  |  |
2025 |  | 145,128,000 |  |  |
2026 |  | 141,672,000 |  |  |
2027 |  | $ 175,000,000 |  |  |
$100 million term loan (refinanced in 2021) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Unsecured debt - fixed rate, carrying amount |  |  |  | $ 100,000,000 |
Basis point reduction in credit spread | basisPoints |  |  |  | 65 |
Forty Million Unsecured Term Loan (repaid in 2021) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Effective interest rate |  |  |  | 2.34% |
Unsecured debt, carrying amount repaid |  |  |  | $ 40,000,000 |
New unsecured debt (2021) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Weighted average interest rates (in hundredths) |  |  |  | 2.40% |
Ramona Distribution Center [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Interest Rate (in hundredths) |  | 3.85% |  |  |
Monthly P & I Payment |  | $ 16,287 |  |  |
Maturity Date |  | 11/30/2026 |  |  |
Carrying Amount of Securing Real Estate |  | $ 8,333,000 |  |  |
Secured debt - fixed rate, carrying amount |  | 2,041,000 |  | $ 2,156,000 |
Notes Payable to Banks [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Unsecured bank credit facilities - variable rate, carrying amount |  | 170,000,000 |  | 209,210,000 |
Unsecured bank credit facilities, net of debt issuance costs |  | 168,454,000 |  | 207,066,000 |
Unamortized debt issuance costs |  | 1,546,000 |  | 2,144,000 |
Unsecured Debt [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Unsecured debt - fixed rate, carrying amount | [6] | 1,695,000,000 |  | 1,245,000,000 |
Unsecured debt, net of debt issuance costs |  | 1,691,259,000 |  | 1,242,570,000 |
Unamortized debt issuance costs |  | 3,741,000 |  | 2,430,000 |
Secured Debt [Member] |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Secured debt - fixed rate, carrying amount | [6] | 2,041,000 |  | 2,156,000 |
Secured debt, net of debt issuance costs |  | 2,031,000 |  | 2,142,000 |
Unamortized debt issuance costs |  | 10,000 |  | $ 14,000 |
$150 million senior unsecured private placement notes (total loan with $75M and $75M tranches) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 150,000,000 |  |  |
Number of notes in debt agreement | Integer |  | 2 |  |  |
$75 million senior unsecured private placement notes (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt Instrument, Term |  | 11 years |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 75,000,000 |  |  |
$75 million senior unsecured private placement notes - second tranche (2022) |  |  |  |  |
Secured and Unsecured Debt [Line Items] |  |  |  |  |
Debt Instrument, Term |  | 12 years |  |  |
Unsecured debt - fixed rate, carrying amount |  | $ 75,000,000 |  |  |
[1] | The interest rates on these unsecured term loans are comprised of LIBOR plus a margin which is subject to a pricing grid for changes in the Company’s coverage ratings. The Company entered into interest rate swap agreements (further described in Note 12) to convert the loans’ LIBOR rates to effectively fixed interest rates. The interest rates in the table above are the effectively fixed interest rates for the loans, including the effects of the interest rate swaps, as of December 31, 2022.
[2] | The interest rates on these unsecured term loans are comprised of Term Secured Overnight Financing Rate (“SOFR”) plus a margin which is subject to a pricing grid for changes in the Company’s coverage ratings. The Company entered into interest rate swap agreements (further described in Note 12) to convert the loans’ Term SOFR rates to effectively fixed interest rates. The interest rates in the table above are the effectively fixed interest rates for the loans, including the effects of the interest rate swaps, as of December 31, 2022.
[3] | This term loan was refinanced effective October 10, 2021. The margin above LIBOR was reduced by 65 basis points, changing the effectively fixed rate from 2.75% to 2.10%. Also, effective August 31, 2022, the loan was amended to replace LIBOR with Term SOFR.
[4] | This term loan was amended and refinanced effective March 25, 2022. The margin was reduced by approximately 60 basis points, changing the effectively fixed rate from 2.39% to 1.80%, and LIBOR was replaced with Term SOFR.
[5] | This term loan was amended effective December 19, 2022 to replace LIBOR with Term SOFR.
[6] | These loans have a fixed interest rate or an effectively fixed interest rate due to interest rate swaps.

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