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INVESTMENT SECURITIES (Tables)

12 Months Ended

Dec. 31, 2022

INVESTMENT SECURITIES

Schedule of amortized cost and estimated fair value of investment securities


		2022												2021
					Gross			Gross									Gross			Gross
		Amortized			Unrealized			Unrealized			Estimated			Amortized			Unrealized			Unrealized			Estimated
(000’s omitted)		Cost			Gains			Losses			Fair Value			Cost			Gains			Losses			Fair Value
Available-for-Sale Portfolio:
U.S. Treasury and agency securities		$	3,660,546		$	0		$	417,009		$	3,243,537		$	4,064,624		$	39,997		$	106,057		$	3,998,564
Obligations of state and political subdivisions			549,118			506			45,327			504,297			413,019			17,326			56			430,289
Government agency mortgage-backed securities			444,689			58			60,114			384,633			474,506			7,615			5,065			477,056
Corporate debt securities			8,000			0			886			7,114			8,000			39			77			7,962
Government agency collateralized mortgage obligations			13,121			1			852			12,270			19,953			410			24			20,339
Total available-for-sale portfolio		$	4,675,474		$	565		$	524,188		$	4,151,851		$	4,980,102		$	65,387		$	111,279		$	4,934,210

Equity and other Securities:
Equity securities, at fair value		$	251		$	168		$	0		$	419		$	251		$	212		$	0		$	463
Federal Home Loan Bank common stock			47,497			0			0			47,497			7,188			0			0			7,188
Federal Reserve Bank common stock			31,144			0			0			31,144			33,916			0			0			33,916
Other equity securities, at adjusted cost			3,532			750			0			4,282			2,562			750			0			3,312
Total equity and other securities		$	82,424		$	918		$	0		$	83,342		$	43,917		$	962		$	0		$	44,879

Held-to-Maturity Portfolio:
U.S. Treasury and agency securities		$	1,079,695		$	0		$	44,900		$	1,034,795		$	0		$	0		$	0		$	0
Total held-to-maturity portfolio		$	1,079,695		$	0		$	44,900		$	1,034,795		$	0		$	0		$	0		$	0

Schedule of investment securities that have been in a continuous unrealized loss position

As of December 31, 2022


		Less than 12 Months								12 Months or Longer								Total
							Gross								Gross								Gross
							Unrealized								Unrealized								Unrealized
(000’s omitted)		#		Fair Value			Losses			#		Fair Value			Losses			#		Fair Value			Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities		41		$	1,384,075		$	132,511		61		$	1,859,462		$	284,498		102		$	3,243,537		$	417,009
Obligations of state and political subdivisions		582			370,524			35,488		76			47,923			9,839		658			418,447			45,327
Government agency mortgage-backed securities		497			190,727			19,508		274			189,919			40,606		771			380,646			60,114
Corporate debt securities		0			0			0		2			7,114			886		2			7,114			886
Government agency collateralized mortgage obligations		29			9,968			600		17			2,274			252		46			12,242			852
Total available-for-sale investment portfolio		1,149		$	1,955,294		$	188,107		430		$	2,106,692		$	336,081		1,579		$	4,061,986		$	524,188
Held-to-Maturity Portfolio:
U.S Treasury and agency securities		23		$	1,034,795		$	44,900		0		$	0		$	0		23		$	1,034,795		$	44,900
Total held-to-maturity portfolio		23		$	1,034,795		$	44,900		0		$	0		$	0		23		$	1,034,795		$	44,900

As of December 31, 2021


		Less than 12 Months								12 Months or Longer								Total
							Gross								Gross								Gross
							Unrealized								Unrealized								Unrealized
(000’s omitted)		#		Fair Value			Losses			#		Fair Value			Losses			#		Fair Value			Losses
Available-for-Sale Portfolio:
U.S. Treasury and agency securities		47		$	1,224,101		$	14,873		13		$	900,462		$	91,184		60		$	2,124,563		$	106,057
Obligations of state and political subdivisions		27			23,966			56		0			0			0		27			23,966			56
Government agency mortgage-backed securities		147			139,442			2,475		52			67,273			2,590		199			206,715			5,065
Corporate debt securities		1			4,923			77		0			0			0		1			4,923			77
Government agency collateralized mortgage obligations		18			3,146			24		1			53			0		19			3,199			24
Total available-for-sale investment portfolio		240		$	1,395,578		$	17,505		66		$	967,788		$	93,774		306		$	2,363,366		$	111,279

Schedule of amortized cost and estimated fair value of debt securities by contractual maturity


		Held-to-Maturity						Available-for-Sale
(000’s omitted)		Amortized Cost			Fair Value			Amortized Cost			Fair Value
Due in one year or less		$	0		$	0		$	521,444		$	516,496
Due after one through five years			0			0			1,728,988			1,574,685
Due after five years through ten years			539,825			524,815			1,161,641			1,020,562
Due after ten years			539,870			509,980			805,591			643,205
Subtotal			1,079,695			1,034,795			4,217,664			3,754,948
Government agency mortgage-backed securities			0			0			444,689			384,633
Government agency collateralized mortgage obligations			0			0			13,121			12,270
Total		$	1,079,695		$	1,034,795		$	4,675,474		$	4,151,851