Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balance, beginning of period at Dec. 31, 2023	$ 2,171,098	$ 79,365	$ 2,303,992	$ (315,291)	$ 103,032
Balance, beginning of period (shares) at Dec. 31, 2023		79,365,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(305)			(305)
Shares issued for stock compensation		$ 143	(143)
Shares issued for stock compensation (shares)		143,000
Equity-based compensation expense	2,560		2,560
Pension plans and OPEB obligations, net of tax	(229)				(229)
Cash flow hedges, net of tax	15,925				15,925
Dividends on common stock	(35,779)			(35,779)
Other transactions, net	2		90	(88)
Balance, end of period at Mar. 31, 2024	2,153,272	$ 79,508	2,306,499	(351,463)	118,728
Balance, end of period (shares) at Mar. 31, 2024		79,508,000
Balance, beginning of period at Dec. 31, 2023	2,171,098	$ 79,365	2,303,992	(315,291)	103,032
Balance, beginning of period (shares) at Dec. 31, 2023		79,365,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,373
Cash flow hedges, net of tax	19,536
Balance, end of period at Jun. 30, 2024	2,112,599	$ 78,902	2,309,555	(397,967)	122,109
Balance, end of period (shares) at Jun. 30, 2024		78,902,000
Balance, beginning of period at Mar. 31, 2024	2,153,272	$ 79,508	2,306,499	(351,463)	118,728
Balance, beginning of period (shares) at Mar. 31, 2024		79,508,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,678			13,678
Shares issued for stock compensation		$ 4	(4)
Shares issued for stock compensation (shares)		4,000
Equity-based compensation expense	2,962		2,962
Repurchase of common stock	(25,012)	$ (610)		(24,402)
Repurchase of common stock (shares)		(610,000)
Pension plans and OPEB obligations, net of tax	(230)				(230)
Cash flow hedges, net of tax	3,611				3,611
Dividends on common stock	(35,677)			(35,677)
Other transactions, net	(5)		98	(103)
Balance, end of period at Jun. 30, 2024	2,112,599	$ 78,902	2,309,555	(397,967)	122,109
Balance, end of period (shares) at Jun. 30, 2024		78,902,000
Balance, beginning of period at Dec. 31, 2024	$ 2,037,670	$ 78,684	2,315,176	(470,331)	114,141
Balance, beginning of period (shares) at Dec. 31, 2024	78,684,000	78,684,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 25,805			25,805
Shares issued for stock compensation		$ 104	(104)
Shares issued for stock compensation (shares)		104,000
Equity-based compensation expense	2,759		2,759
Repurchase of common stock	(4,147)	$ (93)		(4,054)
Repurchase of common stock (shares)		(93,000)
Pension plans and OPEB obligations, net of tax	(148)				(148)
Cash flow hedges, net of tax	(16,609)				(16,609)
Dividends on common stock	(35,435)			(35,435)
Other transactions, net	(2)		103	(105)
Balance, end of period at Mar. 31, 2025	2,009,893	$ 78,695	2,317,934	(484,120)	97,384
Balance, end of period (shares) at Mar. 31, 2025		78,695,000
Balance, beginning of period at Dec. 31, 2024	$ 2,037,670	$ 78,684	2,315,176	(470,331)	114,141
Balance, beginning of period (shares) at Dec. 31, 2024	78,684,000	78,684,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 33,159
Cash flow hedges, net of tax	(24,315)
Balance, end of period at Jun. 30, 2025	$ 1,921,927	$ 77,286	2,321,235	(566,125)	89,531
Balance, end of period (shares) at Jun. 30, 2025	77,286,000	77,286,000
Balance, beginning of period at Mar. 31, 2025	$ 2,009,893	$ 78,695	2,317,934	(484,120)	97,384
Balance, beginning of period (shares) at Mar. 31, 2025		78,695,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	7,354			7,354
Shares issued for stock compensation		$ 10	(10)
Shares issued for stock compensation (shares)		10,000
Equity-based compensation expense	3,195		3,195
Repurchase of common stock	(55,883)	$ (1,419)		(54,464)
Repurchase of common stock (shares)		(1,419,000)
Pension plans and OPEB obligations, net of tax	(147)				(147)
Cash flow hedges, net of tax	(7,706)				(7,706)
Dividends on common stock	(34,778)			(34,778)
Other transactions, net	(1)		116	(117)
Balance, end of period at Jun. 30, 2025	$ 1,921,927	$ 77,286	$ 2,321,235	$ (566,125)	$ 89,531
Balance, end of period (shares) at Jun. 30, 2025	77,286,000	77,286,000