XML 55 R36.htm IDEA: XBRL DOCUMENT

INVESTMENT SECURITIES (Tables)

12 Months Ended

Dec. 31, 2024

INVESTMENT SECURITIES

Schedule of amortized cost and estimated fair value of investment securities


		2024												2023
					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		$	2,389,208		$	0		$	305,422		$	2,083,786		$	2,381,168		$	0		$	300,385		$	2,080,783
Obligations of state and political subdivisions			428,204			288			41,997			386,495			502,879			1,469			29,985			474,363
Government agency mortgage-backed securities			360,102			37			58,915			301,224			400,062			76			51,612			348,526
Corporate debt securities			8,000			0			303			7,697			8,000			0			606			7,394
Government agency collateralized mortgage obligations			6,878			0			366			6,512			9,498			0			572			8,926
Total available-for-sale portfolio		$	3,192,392		$	325		$	407,003		$	2,785,714		$	3,301,607		$	1,545		$	383,160		$	2,919,992
Held-to-Maturity Portfolio:
U.S. Treasury and agency securities		$	1,138,743		$	0		$	123,194		$	1,015,549		$	1,109,101		$	0		$	50,866		$	1,058,235
Government agency mortgage-backed securities			206,412			448			2,241			204,619			63,073			688			180			63,581
Total held-to-maturity portfolio		$	1,345,155		$	448		$	125,435		$	1,220,168		$	1,172,174		$	688		$	51,046		$	1,121,816

Schedule of gains and losses on equity and other securities


(000's omitted)		2024			2023			2022
Net gain (loss) recognized on equity securities		$	1,231		$	(47)		$	(44)
Less: Net gain (loss) recognized on equity securities sold during the period			0			0			0
Unrealized gain (loss) recognized on equity securities still held		$	1,231		$	(47)		$	(44)

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

As of December 31, 2024


	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		$	0		$	0		$	2,083,786		$	305,422		$	2,083,786		$	305,422
Obligations of state and political subdivisions			47,144			847			301,202			41,150			348,346			41,997
Government agency mortgage-backed securities			7,943			221			290,786			58,694			298,729			58,915
Corporate debt securities			0			0			7,697			303			7,697			303
Government agency collateralized mortgage obligations			0			0			6,501			366			6,501			366
Total available-for-sale investment portfolio		$	55,087		$	1,068		$	2,689,972		$	405,935		$	2,745,059		$	407,003

Held-to-Maturity Portfolio:
U.S Treasury and agency securities		$	0		$	0		$	1,015,549		$	123,194		$	1,015,549		$	123,194
Government agency mortgage-backed securities			149,742			2,027			15,281			214			165,023			2,241
Total held-to-maturity portfolio		$	149,742		$	2,027		$	1,030,830		$	123,408		$	1,180,572		$	125,435

As of December 31, 2023


		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		$	0		$	0		$	2,080,783		$	300,385		$	2,080,783		$	300,385
Obligations of state and political subdivisions			63,541			878			287,191			29,107			350,732			29,985
Government agency mortgage-backed securities			8,586			55			336,266			51,557			344,852			51,612
Corporate debt securities			0			0			7,394			606			7,394			606
Government agency collateralized mortgage obligations			0			0			8,907			572			8,907			572
Total available-for-sale investment portfolio		$	72,127		$	933		$	2,720,541		$	382,227		$	2,792,668		$	383,160

Held-to-Maturity Portfolio:
U.S Treasury and agency securities		$	536,885		$	15,953		$	521,350		$	34,913		$	1,058,235		$	50,866
Government agency mortgage-backed securities			18,951			158			1,393			22			20,344			180
Total held-to-maturity portfolio		$	555,836		$	16,111		$	522,743		$	34,935		$	1,078,579		$	51,046

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		$	9,386		$	9,333
Due after one through five years			0			0			1,952,103			1,788,434
Due after five years through ten years			565,934			530,096			303,068			257,109
Due after ten years			572,809			485,453			560,855			423,102
Subtotal			1,138,743			1,015,549			2,825,412			2,477,978
Government agency mortgage-backed securities			206,412			204,619			360,102			301,224
Government agency collateralized mortgage obligations			0			0			6,878			6,512
Total		$	1,345,155		$	1,220,168		$	3,192,392		$	2,785,714