Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning balance at Dec. 31, 2021	$ 1,387,922	$ 17,897	$ 917,053	$ 516,334	$ (63,990)	$ 628
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,821	0	0	19,816	0	5
Amounts reported in other comprehensive (loss) income	(6,270)	0	0	0	(6,271)	1
Dividends declared	(7,434)	0	0	(7,434)	0	0
Share issuance and equity-based compensation plans	1,661	15	1,646	0	0	0
Ending balance at Mar. 31, 2022	1,395,700	17,912	918,699	528,716	(70,261)	634
Beginning balance at Dec. 31, 2021	1,387,922	17,897	917,053	516,334	(63,990)	628
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	34,192
Amounts reported in other comprehensive (loss) income	(81,288)
Ending balance at Jun. 30, 2022	1,330,566	17,920	921,642	535,621	(145,246)	629
Beginning balance at Mar. 31, 2022	1,395,700	17,912	918,699	528,716	(70,261)	634
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,371	0	0	14,343	0	28
Amounts reported in other comprehensive (loss) income	(75,018)	0	0	0	(74,985)	(33)
Dividends declared	(7,438)	0	0	(7,438)	0	0
Share issuance and equity-based compensation plans	2,951	8	2,943	0	0	0
Ending balance at Jun. 30, 2022	1,330,566	17,920	921,642	535,621	(145,246)	629
Beginning balance at Dec. 31, 2022	1,278,585	17,950	928,288	469,920	(138,240)	667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,541	0	0	29,534	0	7
Amounts reported in other comprehensive (loss) income	15,066	0	0	0	15,063	3
Dividends declared	(7,822)	0	0	(7,822)	0	0
Share issuance and equity-based compensation plans	1,418	32	1,386	0	0	0
Ending balance at Mar. 31, 2023	1,316,788	17,982	929,674	491,632	(123,177)	677
Beginning balance at Dec. 31, 2022	1,278,585	17,950	928,288	469,920	(138,240)	667
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58,934
Amounts reported in other comprehensive (loss) income	8,097
Ending balance at Jun. 30, 2023	1,336,666	17,999	934,941	513,148	(130,108)	686
Beginning balance at Mar. 31, 2023	1,316,788	17,982	929,674	491,632	(123,177)	677
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,393	0	0	29,346	0	47
Amounts reported in other comprehensive (loss) income	(6,969)	0	0	0	(6,931)	(38)
Dividends declared	(7,830)	0	0	(7,830)	0	0
Share issuance and equity-based compensation plans	5,284	17	5,267	0	0	0
Ending balance at Jun. 30, 2023	$ 1,336,666	$ 17,999	$ 934,941	$ 513,148	$ (130,108)	$ 686