FAIR VALUE OF FINANCIAL INSTRUMENTS (Table)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

	June 30, 2021				December 31, 2020
(In thousands)	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
3.84% Senior notes due 2021	$	100,000	$	101,125	$	100,000	$	102,173
3.70% Senior notes due 2023	202,500		210,302		202,500		211,790
3.85% Senior notes due 2025	90,000		96,308		90,000		97,429
4.24% Senior notes due 2026	200,000		220,055		200,000		224,390
4.05% Senior notes due 2028	67,500		73,758		67,500		75,440
4.11% Senior notes due 2028	90,000		98,562		90,000		101,047
3.10% Senior notes due 2030	150,000		152,292		150,000		155,805
3.20% Senior notes due 2032	150,000		150,877		150,000		155,048
Total debt	1,050,000		1,103,279		1,050,000		1,123,122
Debt issuance costs, net	(1,038)		(1,038)		(1,147)		(1,147)
Unamortized interest rate swap proceeds	8,542		8,542		9,439		9,439
Total debt, net	$	1,057,504	$	1,110,783	$	1,058,292	$	1,131,414