CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Cumulative effect adoption adjustment	Common Stock	Preferred Stock	Surplus	Retained earnings		Retained earnings Cumulative effect adoption adjustment	Treasury stock	Accumulated other comprehensive (loss) income
Beginning 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	[1]	(163,693)					(163,693)
Preferred stock		(1,412)					(1,412)
Common stock purchases	[2]	(637,664)				53,592				(691,256)
Stock based compensation		18,178				4,450				13,728
Other comprehensive 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	$ 28,752	1,047	22,143	4,790,993	3,834,348		$ 28,752	(2,030,178)	(2,524,928)
Increase Decrease In Stockholders Equity
Net income		541,342					541,342
Issuance of stock	[1]	6,311		1		6,310
Dividends declared:
Common stock		(163,664)					(163,664)	[1]
Preferred stock		(1,412)					(1,412)
Common stock purchases		(4,550)								(4,550)
Stock based compensation		17,352				1,581				15,771
Other comprehensive income, net of tax		629,397									629,397
Transfer to statutory reserve		0				44,515	(44,515)
Ending balance at Dec. 31, 2023		5,146,953		1,048	22,143	4,843,399	4,194,851			(2,018,957)	(1,895,531)
Increase Decrease In Stockholders Equity
Net income		614,212					614,212
Issuance of stock		6,860				6,860
Dividends declared:
Common stock	[3]	(183,854)					(183,854)
Preferred stock		(1,412)					(1,412)
Common stock purchases		(224,626)								(224,626)
Stock based compensation		20,642				5,594				15,048
Other comprehensive income, net of tax		234,291									234,291
Transfer to statutory reserve		0				52,840	(52,840)
Ending balance at Dec. 31, 2024		$ 5,613,066		$ 1,048	$ 22,143	$ 4,908,693	$ 4,570,957			$ (2,228,535)	$ (1,661,240)

[1] Dividends declared per common share during the year ended   December 31, 2024 - $ 2.56   (2023 - $ 2.27 ; 2022 - $ 2.20 ).

[2] During the year ended   December 31, 2022,   the Corporation completed   two accelerated share   repurchase transactions with   respect to its common stock, which were   accounted for   as a treasury   stock transactions.   The aggregate   amount of both   transactions was   $ 631   million. Refer   to Note 19 for additional information.

[3] Includes common   stock repurchases   of $ 217.3   million   as part   of a   repurchase   authorization   up to   $ 500   million.   Refer to   Note   19 for   additional information.