Consolidated Statement of Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock, Common	Capital in Excess of Par Value	Retained Earnings [Member]	Accumulated Other Comprehensive Income	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2022	$ 1,673,423	$ 156,089	$ (2,149)	$ 958,329	$ 544,384	$ 16,538	$ 232
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	145,127	0	0	0	144,763	299	65
Dividends, Common Stock	$ (41,207)	0	0	0	41,207	0	0
Dividends declared per share	$ 0.27
Stock option exercises	$ 8,763	298	0	8,465	0	0	0
Restricted stock awards, net of forfeitures	0	132	1	(133)	0	0	0
Employee share-based compensation earned	4,478	0	0	4,478	0	0	0
Purchase of Company common stock	(167,305)	0	(2,432)	(16,500)	(148,373)	0	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	107	0	0	0	0	0	107
Other	1,271	0	0	1,271	0	0	0
Balance at end of period at Mar. 31, 2023	1,621,901	156,519	(4,580)	953,368	499,567	16,837	190
Balance at beginning of period at Dec. 31, 2022	1,673,423	156,089	(2,149)	958,329	544,384	16,538	232
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	285,264
Balance at end of period at Jun. 30, 2023	1,645,391	156,775	(5,840)	955,602	513,979	24,621	254
Balance at beginning of period at Mar. 31, 2023	1,621,901	156,519	(4,580)	953,368	499,567	16,837	190
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	140,137	0	0	0	132,188	7,784	165
Dividends, Common Stock	(40,780)	0	0	0	40,780	0	0
Stock option exercises	5,801	232	0	5,569	0	0	0
Employee share-based compensation earned	3,671	0	0	3,671	0	0	0
Purchase of Company common stock	(86,859)	0	(1,260)	(8,603)	(76,996)	0	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	101	0	0	0	0	0	101
Other	(1,621)	(24)	0	(1,597)	0	0	0
Balance at end of period at Jun. 30, 2023	1,645,391	156,775	(5,840)	955,602	513,979	24,621	254
Balance at beginning of period at Dec. 31, 2023	1,541,473	148,298	(1,975)	937,596	432,454	24,891	209
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	122,794	0	0	0	131,301	(8,477)	(30)
Dividends, Common Stock	$ (43,944)	0	0	0	43,944	0	0
Dividends declared per share	$ 300
Stock option exercises	$ 17,237	544	0	16,693	0	0	0
Restricted stock awards, net of forfeitures	0	138	0	(138)	0	0	0
Employee share-based compensation earned	3,926	0	0	3,926	0	0	0
Purchase of Company common stock	(49,490)	0	(706)	(4,518)	(44,266)	0	0
Other	1,215	0	0	1,215	0	0	0
Balance at end of period at Mar. 31, 2024	1,590,781	148,980	(2,681)	952,344	475,545	16,414	179
Balance at beginning of period at Dec. 31, 2023	1,541,473	148,298	(1,975)	937,596	432,454	24,891	209
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	237,097
Balance at end of period at Jun. 30, 2024	1,539,690	149,018	(4,480)	945,646	436,896	12,498	112
Balance at beginning of period at Mar. 31, 2024	1,590,781	148,980	(2,681)	952,344	475,545	16,414	179
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	114,303	0	0	0	118,166	(3,916)	53
Dividends, Common Stock	(43,384)	0	0	0	43,384	0	0
Stock option exercises	622	14	0	608	0	0	0
Employee share-based compensation earned	4,040	0	0	4,040	0	0	0
Purchase of Company common stock	(128,172)	0	(1,799)	(12,942)	(113,431)	0	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	120	0	0	0	0	0	120
Other	(1,620)	(24)	0	(1,596)	0	0	0
Balance at end of period at Jun. 30, 2024	$ 1,539,690	$ 149,018	$ (4,480)	$ 945,646	$ 436,896	$ 12,498	$ 112