Note 9 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	At June 30, 2024
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3) (1)
	(In thousands)
Debt securities available for sale:
Agency residential MBS	$	222,806	$	-	$	222,806	$	-
Securities of U.S. Government sponsored entities		291,206		-		291,206		-
U.S. Treasury securities		4,820		4,820		-		-
Obligations of states and political subdivisions		69,758		-		69,758		-
Corporate securities		1,855,618		-		1,855,618		-
Collateralized loan obligations		1,255,110		-		1,255,110		-
Total debt securities available for sale	$	3,699,318	$	4,820	$	3,694,498	$	-

	At December 31, 2023
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3) (1)
	(In thousands)
Debt securities available for sale:
Agency residential MBS	$	239,454	$	-	$	239,454	$	-
Securities of U.S. Government sponsored entities		294,919		-		294,919		-
Obligations of states and political subdivisions		71,283		-		71,283		-
Corporate securities		1,909,548		-		1,909,548		-
Collateralized loan obligations		1,484,597		-		1,484,597		-
Total debt securities available for sale	$	3,999,801	$	-	$	3,999,801	$	-

Fair Value Measurements, Nonrecurring [Table Text Block]

									For the Six
									Months Ended
	At June 30, 2024								June 30, 2024
	Carrying Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Loans:
Commercial real estate	$	14	$	-	$	-	$	14	$	-
Total assets measured at fair value on a nonrecurring basis	$	14	$	-	$	-	$	14	$	-

									For the
									Year Ended
	At December 31, 2023								December 31, 2023
	Carrying Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Loans:
Commercial real estate	$	110	$	-	$	-	$	110	$	-
Total assets measured at fair value on a nonrecurring basis	$	110	$	-	$	-	$	110	$	-

Fair Value, by Balance Sheet Grouping [Table Text Block]

	At June 30, 2024
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2 )		Significant Unobservable Inputs (Level 3 )
Financial Assets:	(In thousands)
Cash and due from banks	$	486,124	$	486,124	$	486,124	$	-	$	-
Debt securities held to maturity		860,868		817,071		-		817,071		-
Loans		815,890		813,272		-		-		813,272
Financial Liabilities:
Deposits	$	5,131,440	$	5,129,495	$	-	$	5,042,434	$	87,061
Bank Term Funding Program borrowings		200,000		200,112		-		200,112		-
Securities sold under repurchase agreements		100,167		100,167		-		100,167

	At December 31, 2023
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2 )		Significant Unobservable Inputs (Level 3 )
Financial Assets:	(In thousands)
Cash and due from banks	$	190,314	$	190,314	$	190,314	$	-	$	-
Debt securities held to maturity		878,396		849,562		-		849,562		-
Loans		849,735		847,031		-		-		847,031
Financial Liabilities:
Deposits	$	5,474,267	$	5,474,012	$	-	$	5,377,465	$	96,547
Securities sold under repurchase agreements		58,162		58,162		-		58,162		-