Debt Disclosure (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Long-term debt

	December 31,
	2023		2022
	(Thousands)
7.125% Debentures due 2025	$	85,000	$	85,000
4.0% Notes due 2027	500,000		500,000
Unamortized debt issuance costs	(1,954)		(2,517)
Unamortized debt discount	(1,868)		(2,400)
Total long-term debt	$	581,178	$	580,083

Maturities of long-term debt

The following table reflects future maturities of long-term (at face value) debt for the next five years (in thousands):

2025	$	85,000
2027	$	500,000