Note 9 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

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

		At March 31, 2026
		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		$	177,308			$	-			$	177,308			$	-
Agency commercial MBS			946,114				-				946,114				-
Securities of U.S. Government sponsored entities			298,502				-				298,502				-
Obligations of states and political subdivisions			45,422				-				45,422				-
Corporate securities			1,835,522				-				1,835,522				-
Collateralized loan obligations			293,987				-				293,987				-
Total debt securities available for sale			3,596,855				-				3,596,855				-
Equity securities held for trading			219				219				-				-
Total securities measured at fair value		$	3,597,074			$	219			$	3,596,855			$	-

		At December 31, 2025
		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		$	184,346			$	-			$	184,346			$	-
Agency commercial MBS			707,560				-				707,560				-
Securities of U.S. Government sponsored entities			302,412				-				302,412				-
Obligations of states and political subdivisions			45,722				-				45,722				-
Corporate securities			1,804,080				-				1,804,080				-
Collateralized loan obligations			424,614				-				424,614				-
Total debt securities available for sale			3,468,734				-				3,468,734				-
Equity securities held for trading			466				466				-				-
Total securities measured at fair value		$	3,469,200			$	466			$	3,468,734			$	-

Fair Value Measurements, Nonrecurring [Table Text Block]

																		For the Three
																		Months Ended
		At March31, 2026																March 31, 2026
		Carrying Value				Level 1				Level 2				Level 3				Total Losses
		(In thousands)
Loans:
Commercial		$	608			$	-			$	-			$	608			$	-
Total assets measured at fair value on a nonrecurring basis		$	608			$	-			$	-			$	608			$	-

																		For the
																		Year Ended
		At December 31, 2025																December 31, 2025
		Carrying Value				Level 1				Level 2				Level 3				Total Losses
		(In thousands)
Loans:
Commercial		$	707			$	-			$	-			$	707			$	-
Total assets measured at fair value on a nonrecurring basis		$	707			$	-			$	-			$	707			$	-

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

		At March 31, 2026
		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		$	397,284			$	397,284			$	397,284			$	-			$	-
Debt securities held to maturity			799,558				784,304				-				784,304				-
Loans			685,053				683,792				-				-				683,792

Financial Liabilities:
Deposits		$	4,783,752			$	4,779,959			$	-			$	4,718,809			$	61,150
Securities sold under repurchase agreements			144,456				144,456				-				144,456				-

		At December 31, 2025
		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		$	567,801			$	567,801			$	567,801			$	-			$	-
Debt securities held to maturity			819,574				812,580				-				812,580				-
Loans			714,909				716,439				-				-				716,439

Financial Liabilities:
Deposits		$	4,840,019			$	4,836,933			$	-			$	4,772,998			$	63,935
Securities sold under repurchase agreements			137,298				137,298				-				137,298				-