UNSECURED DEBT (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 1,510,000	$ 1,680,000
Unsecured debt, net of debt issuance costs		$ 1,507,157	$ 1,676,347
Weighted average interest rates (in hundredths)		6.25%	5.68%	2.32%
Proceeds from unsecured debt		$ 0	$ 100,000	$ 525,000
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		1,510,000	1,680,000
Unsecured Debt [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[1]	1,510,000	1,680,000
Unamortized debt issuance costs		2,843	3,653
Unsecured debt, net of debt issuance costs		1,507,157	1,676,347
Payments of principal over future years [Abstract]
2025		145,000
2026		140,000
2027		175,000
2028		160,000
2029		155,000
Thereafter		735,000
Long-Term Debt, Gross	[1]	$ 1,510,000	1,680,000
$65 million term loan (2016) [Member]
Unsecured Debt [Line Items]
Effective interest rate		2.31%
Unsecured debt, carrying amount repaid			$ 65,000
Fifty million senior unsecured notes [Member]
Unsecured Debt [Line Items]
Effective interest rate			3.80%
Unsecured debt, carrying amount repaid			$ 50,000
$50 million term loan (2022)
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2]	$ 0	50,000
Debt instrument, margin	[2]	0.94%
Effective interest rate	[2]	4.08%
Debt Instrument, Maturity Date	[2]	Aug. 30, 2024
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2]	$ 0	50,000
Sixty million senior unsecured notes (executed in 2017) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 0	60,000
Effective interest rate		3.46%
Debt Instrument, Maturity Date		Dec. 13, 2024
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 0	60,000
Sixty million senior unsecured notes (executed in 2016) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 0	60,000
Effective interest rate		3.48%
Debt Instrument, Maturity Date		Dec. 15, 2024
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 0	60,000
$50 million unsecured term loan (2021)
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2]	$ 50,000	50,000
Debt instrument, margin	[2]	1.10%
Effective interest rate	[2]	1.58%
Debt Instrument, Maturity Date	[2]	Mar. 18, 2025
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2]	$ 50,000	50,000
Twenty million senior unsecured notes [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 20,000	20,000
Effective interest rate		3.80%
Debt Instrument, Maturity Date		Aug. 28, 2025
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 20,000	20,000
Twenty-five million senior unsecured notes (executed in 2015) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 25,000	25,000
Effective interest rate		3.97%
Debt Instrument, Maturity Date		Oct. 01, 2025
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 25,000	25,000
Fifty million senior unsecured notes (executed in 2015) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 50,000	50,000
Effective interest rate		3.99%
Debt Instrument, Maturity Date		Oct. 07, 2025
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 50,000	50,000
$100 million term loan (2019) - refinanced in 2021 [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2]	$ 100,000	100,000
Debt instrument, margin	[2]	0.94%
Effective interest rate	[2]	2.09%
Debt Instrument, Maturity Date	[2]	Oct. 10, 2026
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2]	$ 100,000	100,000
Forty million senior unsecured notes (executed in 2016) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 40,000	40,000
Effective interest rate		3.75%
Debt Instrument, Maturity Date		Dec. 15, 2026
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 40,000	40,000
$100 million term loan (2020)
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2]	$ 100,000	100,000
Debt instrument, margin	[2]	0.95%
Effective interest rate	[2]	1.80%
Debt Instrument, Maturity Date	[2]	Mar. 25, 2027
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2]	$ 100,000	100,000
$ 75 million term loan (2022)
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2]	$ 75,000	75,000
Debt instrument, margin	[2]	0.94%
Effective interest rate	[2]	3.99%
Debt Instrument, Maturity Date	[2]	Aug. 31, 2027
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2]	$ 75,000	75,000
Sixty million senior unsecured notes (executed in 2018) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 60,000	60,000
Effective interest rate		3.93%
Debt Instrument, Maturity Date		Apr. 10, 2028
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 60,000	60,000
$100 million senior unsecured term loan (new in 2022; refinanced in 2023)
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2],[3]	$ 100,000	$ 100,000
Debt instrument, margin	[2],[3]	0.95%
Effective interest rate	[2],[3]	2.61%	3.06%
Debt Instrument, Maturity Date	[2],[3]	Sep. 29, 2028
Basis point reduction in credit spread				60
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2],[3]	$ 100,000	$ 100,000
Debt Instrument, Description of Variable Rate Basis			45
$80 million senior unsecured private placement notes (2019) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 80,000	$ 80,000
Effective interest rate		4.27%
Debt Instrument, Maturity Date		Mar. 28, 2029
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 80,000	80,000
$75 million senior unsecured private placement notes (2019) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 75,000	75,000
Effective interest rate		3.47%
Debt Instrument, Maturity Date		Aug. 19, 2029
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 75,000	75,000
$100 million term loan (new in 2023)
Unsecured Debt [Line Items]
Long-Term Debt, Gross	[2]	$ 100,000	100,000
Debt instrument, margin	[2]	1.35%
Effective interest rate	[2]	5.27%
Debt Instrument, Maturity Date	[2]	Jan. 13, 2030
Payments of principal over future years [Abstract]
Long-Term Debt, Gross	[2]	$ 100,000	100,000
$100 million senior unsecured private placement notes (2020)
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 100,000	100,000
Effective interest rate		2.61%
Debt Instrument, Maturity Date		Oct. 14, 2030
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 100,000	100,000
$125 million senior unsecured private placement notes (2021)
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 125,000	125,000
Effective interest rate		2.74%
Debt Instrument, Maturity Date		Jun. 10, 2031
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 125,000	125,000
$35 million senior unsecured private placement notes (2019) [Member]
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 35,000	35,000
Effective interest rate		3.54%
Debt Instrument, Maturity Date		Aug. 15, 2031
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 35,000	35,000
$150 million senior note (2022)
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 150,000	150,000
Effective interest rate		3.03%
Debt Instrument, Maturity Date		Apr. 20, 2032
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 150,000	150,000
$75 million senior unsecured private placement notes (2020)
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 75,000	75,000
Effective interest rate		2.71%
Debt Instrument, Maturity Date		Oct. 14, 2032
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 75,000	75,000
$75 million senior unsecured private placement notes (2022)
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 75,000	75,000
Effective interest rate		4.90%
Debt Instrument, Maturity Date		Oct. 12, 2033
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 75,000	75,000
$75 million senior unsecured private placement notes - second tranche (2022)
Unsecured Debt [Line Items]
Long-Term Debt, Gross		$ 75,000	75,000
Effective interest rate		4.95%
Debt Instrument, Maturity Date		Oct. 12, 2034
Payments of principal over future years [Abstract]
Long-Term Debt, Gross		$ 75,000	$ 75,000
New debt during the period
Unsecured Debt [Line Items]
Long-Term Debt, Gross				$ 525,000
Effective interest rate				3.82%
Payments of principal over future years [Abstract]
Long-Term Debt, Gross				$ 525,000
Debt refinanced during the period
Unsecured Debt [Line Items]
Long-Term Debt, Gross				100,000
Payments of principal over future years [Abstract]
Long-Term Debt, Gross				100,000
Debt repaid during the period
Unsecured Debt [Line Items]
Long-Term Debt, Gross				$ 75,000
Effective interest rate				3.03%
Payments of principal over future years [Abstract]
Long-Term Debt, Gross				$ 75,000

[1] These loans have a fixed interest rate or an effectively fixed interest rate due to interest rate swaps.

[2] The interest rates on these unsecured term loans are comprised of Term 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, 2024.

[3] This term loan was refinanced effective September 29, 2023. The margin was reduced by approximately 45 basis points, changing the effectively fixed rate from 3.06% to 2.61%.