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			(17,867)	9,179
Equity compensation			14,341
Repurchase of common stock				(221,873)
Other comprehensive income (loss), net of tax	$ (445,435)				(445,435)
Net income	424,281					424,281
Cash dividends						(50,989)
Balance, end of period at Jun. 30, 2022	4,573,019	371,353	1,791,380	(887,959)	(325,738)	3,623,983
Balance, beginning of period at Mar. 31, 2022		371,353	1,783,611	(793,696)	(150,848)	3,399,935
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			0	0
Equity compensation			7,769
Repurchase of common stock				(94,263)
Other comprehensive income (loss), net of tax	(174,890)				(174,890)
Net income	249,268					249,268
Cash dividends						(25,220)
Balance, end of period at Jun. 30, 2022	4,573,019	371,353	1,791,380	(887,959)	(325,738)	3,623,983
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			(16,912)	9,713
Equity compensation			17,514
Repurchase of common stock				(152,258)
Other comprehensive income (loss), net of tax	56,624				56,624
Net income	345,601					345,601
Cash dividends	(58,800)					(58,760)
Balance, end of period at Jun. 30, 2023	4,844,262	371,353	1,799,444	(1,192,783)	(424,887)	4,291,135
Balance, beginning of period at Mar. 31, 2023		371,353	1,791,609	(1,119,048)	(395,499)	4,129,229
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			0	0
Equity compensation			7,835
Repurchase of common stock				(73,735)
Other comprehensive income (loss), net of tax	(29,388)				(29,388)
Net income	191,054					191,054
Cash dividends						(29,148)
Balance, end of period at Jun. 30, 2023	$ 4,844,262	$ 371,353	$ 1,799,444	$ (1,192,783)	$ (424,887)	$ 4,291,135