CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative effect adoption adjustment	Common Stock	Preferred Stock	Capital surplus	Retained earnings	Retained earnings Cumulative effect adoption adjustment	Treasury stock	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2019	$ 6,016,779	$ (205,842)	$ 1,044	$ 50,160	$ 4,447,412	$ 2,147,915	$ (205,842)	$ (459,814)	$ (169,938)
Increase Decrease In Stockholders Equity
Net income	506,622					506,622
Issuance of stock	4,263		1		4,262
Dividends declared:
Common stock	(136,561)					(136,561)
Preferred stock	(1,758)					(1,758)
Common stock purchases	(504,172)				76,335			(580,507)
Common stock reissuance	4,830				(1,192)			6,022
Preferred stock redemption amount	(28,017)			(28,017)
Stock based compensation	12,614				(4,731)			17,345
Other comprehensive (loss) income, net of tax	359,929								359,929
Transfer to statutory reserve	0				49,448	(49,448)
Ending balance at Dec. 31, 2020	6,028,687		1,045	22,143	4,571,534	2,260,928		(1,016,954)	189,991
Increase Decrease In Stockholders Equity
Net income	934,889					934,889
Issuance of stock	4,674		1		4,673
Dividends declared:
Common stock	(142,290)					(142,290)
Preferred stock	(1,412)					(1,412)
Common stock purchases	(355,650)				(8,557)			(347,093)
Stock based compensation	15,559				4,162			11,397
Other comprehensive (loss) income, net of tax	(515,060)								(515,060)
Transfer to statutory reserve	0				78,370	(78,370)
Ending balance at Dec. 31, 2021	5,969,397		1,046	22,143	4,650,182	2,973,745		(1,352,650)	(325,069)
Increase Decrease In Stockholders Equity
Net income	1,102,641					1,102,641
Issuance of stock	5,837		1		5,836
Dividends declared:
Common stock	(163,693)					(163,693)
Preferred stock	(1,412)					(1,412)
Common stock purchases	(637,664)				53,592			(691,256)
Stock based compensation	18,178				4,450			13,728
Other comprehensive (loss) income, net of tax	(2,199,859)								(2,199,859)
Transfer to statutory reserve	0				76,933	(76,933)
Ending balance at Dec. 31, 2022	$ 4,093,425		$ 1,047	$ 22,143	$ 4,790,993	$ 3,834,348		$ (2,030,178)	$ (2,524,928)