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, 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		211,686					211,686
Issuance of stock		1,199		0		1,199
Dividends declared:
Common stock	[1]	(42,074)					(42,074)
Preferred stock		(353)					(353)
Common stock purchases	[2]	(404,920)				(80,000)			(324,920)
Stock based compensation		8,480				(270)			8,750
Other comprehensive (loss) income, net of tax		(1,072,169)								(1,072,169)
Ending balance at Mar. 31, 2022		4,671,246		1,046	22,143	4,571,111	3,143,004		(1,668,820)	(1,397,238)
Beginning balance at Dec. 31, 2022		4,093,425		1,047	22,143	4,790,993	3,834,348		(2,030,178)	(2,524,928)
Increase Decrease In Stockholders Equity
Net income		158,979					158,979
Issuance of stock		1,567				1,567
Dividends declared:
Common stock		(39,586)					(39,586)
Preferred stock		(353)					(353)
Common stock purchases		(2,970)				0			(2,970)
Stock based compensation		7,808				59			7,749
Other comprehensive (loss) income, net of tax		223,103								223,103
Ending balance at Mar. 31, 2023		$ 4,470,725	$ 28,752	$ 1,047	$ 22,143	$ 4,792,619	$ 3,982,140	$ 28,752	$ (2,025,399)	$ (2,301,825)

[1] Dividends declared per common share during the quarter   ended March 31, 2023 - $ 0.55   (2022 - $ 0.55 ).

[2] During the quarter   ended March 31,   2022, the Corporation   entered into a   $ 400   million accelerated share   repurchase transaction with   respect to its common stock, which was accounted for as a treasury   stock transaction. Refer to Note 18 for additional information.