Note 9 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

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

	At June 30, 2021
	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 mortgage-backed securities (MBS)	$	510,460	$	-	$	510,460	$	-
Securities of U.S. Government entities		137		-		137		-
Obligations of states and political subdivisions		104,603		-		104,603		-
Corporate securities		2,596,850		-		2,596,850		-
Collateralized loan obligations		1,092,112		-		1,092,112		-
Total debt securities available for sale	$	4,304,162	$	-	$	4,304,162	$	-

	At December 31, 2020
	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	$	652,952	$	-	$	652,952	$	-
Securities of U.S. Government entities		154		-		154		-
Obligations of states and political subdivisions		111,010		-		111,010		-
Corporate securities		2,117,978		-		2,117,978		-
Commercial paper		24,990		-		24,990		-
Collateralized loan obligations		1,156,101		-		1,156,101		-
Total debt securities available for sale	$	4,063,185	$	-	$	4,063,185	$	-

Fair Value Measurements, Nonrecurring [Table Text Block]

									For the Six
									Months Ended
	At June 30, 2021								June 30, 2021
	Carrying Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Loans:
Commercial real estate	$	3,409	$	-	$	-	$	3,409	$	-
Residential real estate		175		-		-		175		-
Total assets measured at fair value on a nonrecurring basis	$	3,584	$	-	$	-	$	3,584	$	-

									For the
									Year Ended
	At December 31, 2020								December 31, 2020
	Carrying Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Loans:
Commercial	$	5,270	$	-	$	-	$	5,270	$	-
Commercial real estate		3,710		-		-		3,710		-
Residential real estate		181		-		-		181		-
Total assets measured at fair value on a nonrecurring basis	$	9,161	$	-	$	-	$	9,161	$	-

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

	At June 30, 2021
	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	$	939,929	$	939,929	$	939,929	$	-	$	-
Debt securities held to maturity		414,413		424,599		-		424,599		-
Loans		1,171,097		1,188,428		-		-		1,188,428
Financial Liabilities:
Deposits	$	6,076,389	$	6,076,339	$	-	$	5,922,812	$	153,527
Short-term borrowed funds		90,043		90,043		-		90,043		-

	At December 31, 2020
	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	$	621,275	$	621,275	$	621,275	$	-	$	-
Debt securities held to maturity		515,589		529,678		-		529,678		-
Loans		1,232,389		1,290,938		-		-		1,290,938
Financial Liabilities:
Deposits	$	5,687,979	$	5,688,049	$	-	$	5,531,590	$	156,459
Short-term borrowed funds		102,545		102,545		-		102,545		-