CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Treasury stock	Accumulated other comprehensive income (loss)	Retained earnings
Balance, beginning of period at Dec. 31, 2021		$ 371,353	$ 1,794,906	$ (675,265)	$ 119,697	$ 3,250,691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(20,537)	10,579
Equity compensation			17,674
Repurchase of common stock				(306,184)
Other comprehensive income (loss), net of tax	$ (615,222)				(615,222)
Net income	673,906					673,906
Cash dividends						(81,537)
Balance, end of period at Sep. 30, 2022	4,540,061	371,353	1,792,043	(970,870)	(495,525)	3,843,060
Balance, beginning of period at Jun. 30, 2022		371,353	1,791,380	(887,959)	(325,738)	3,623,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(2,670)	1,400
Equity compensation			3,333
Repurchase of common stock				(84,311)
Other comprehensive income (loss), net of tax	(169,787)				(169,787)
Net income	249,625					249,625
Cash dividends						(30,548)
Balance, end of period at Sep. 30, 2022	4,540,061	371,353	1,792,043	(970,870)	(495,525)	3,843,060
Balance, beginning of period at Dec. 31, 2022	4,642,740	371,353	1,798,842	(1,050,238)	(481,511)	4,004,294
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends	(58,800)
Balance, end of period at Jun. 30, 2023		371,353	1,799,444	(1,192,783)	(424,887)	4,291,135
Balance, beginning of period at Dec. 31, 2022	4,642,740	371,353	1,798,842	(1,050,238)	(481,511)	4,004,294
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(16,992)	9,746
Reduction in shareholders' equity due to debt conversion			(5,315)
Equity compensation			23,089
Repurchase of common stock				(219,930)
Other comprehensive income (loss), net of tax	(15,384)				(15,384)
Net income	528,445					528,445
Cash dividends						(91,694)
Balance, end of period at Sep. 30, 2023	4,854,705	371,353	1,799,624	(1,260,422)	(496,895)	4,441,045
Balance, beginning of period at Jun. 30, 2023		371,353	1,799,444	(1,192,783)	(424,887)	4,291,135
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(80)	33
Reduction in shareholders' equity due to debt conversion			(5,315)
Equity compensation			5,575
Repurchase of common stock				(67,672)
Other comprehensive income (loss), net of tax	(72,008)				(72,008)
Net income	182,844					182,844
Cash dividends						(32,934)
Balance, end of period at Sep. 30, 2023	$ 4,854,705	$ 371,353	$ 1,799,624	$ (1,260,422)	$ (496,895)	$ 4,441,045