Equity - Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	59,484,000
Balance at beginning of period	$ 1,638,286	$ 1,430,312
Net income (loss)	13,202	69,690
Issuance of common stock	2,134	1,507
Repurchase of common stock	(1,109)	(1,142)
Dividends paid on common stock	(20,226)	(16,164)
Adjustment for unrecoverable pension benefit plan costs		(13,663)
Other comprehensive income, net of tax	154	(13,366)
Amounts reclassified to earnings		297
Investment in business with noncontrolling interest	0	0
Distribution to noncontrolling interest	$ (452)
Balance at end of period (in shares)	59,570,000
Balance at end of period	$ 1,631,989	$ 1,470,837
Dividends paid on common stock (in dollars per share)	$ 0.34	$ 0.28
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	59,484,000	57,724,000
Balance at beginning of period	$ 595	$ 577
Issuance of common stock (in shares)	110,000	55,000
Issuance of common stock	$ 1	$ 1
Repurchase of common stock (in shares)	(24,000)	(25,000)
Balance at end of period (in shares)	59,570,000	57,754,000
Balance at end of period	$ 596	$ 578
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	966,975	876,583
Issuance of common stock	2,133	1,506
Repurchase of common stock	(1,109)	(1,142)
Investment in business with noncontrolling interest	(310)	(53)
Balance at end of period	967,689	876,894
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	674,918	549,573
Net income (loss)	13,331	69,917
Dividends paid on common stock	(20,226)	(16,164)
Balance at end of period	668,023	603,326
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	(7,217)	0
Adjustment for unrecoverable pension benefit plan costs		(13,663)
Other comprehensive income, net of tax	154
Amounts reclassified to earnings		297
Balance at end of period	(7,063)	(13,366)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	3,015	3,579
Net income (loss)	(129)	(227)
Investment in business with noncontrolling interest	310	53
Distribution to noncontrolling interest	(452)
Balance at end of period	$ 2,744	$ 3,405