CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Paid-in capital Cumulative Effect, Period of Adoption, Adjustment	Paid-in capital Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury stock	Accumulated other comprehensive income (loss)	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance
Balance, beginning of period at Dec. 31, 2020		$ 371,353	$ 1,862,042	$ (68,289)	$ 1,793,753	$ (393,326)	$ 216,821	$ 2,642,096	$ 68,289	$ 2,710,385
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(15,745)			8,776
Equity compensation			8,252
Repurchase of common stock						0
Other comprehensive income (loss), net of tax	$ (47,539)						(47,539)
Net income	303,072							303,072
Cash dividends								(41,095)
Balance, end of period at Jun. 30, 2021	$ 4,914,707	371,353	1,786,260			(384,550)	169,282	2,972,362
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]
Balance, beginning of period at Mar. 31, 2021		371,353	1,782,041			(384,550)	123,565	2,839,884
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(348)			0
Equity compensation			4,567
Repurchase of common stock						0
Other comprehensive income (loss), net of tax	$ 45,717						45,717
Net income	153,051							153,051
Cash dividends								(20,573)
Balance, end of period at Jun. 30, 2021	4,914,707	371,353	1,786,260			(384,550)	169,282	2,972,362
Balance, beginning of period at Dec. 31, 2021	4,861,382	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	(51,000)							(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