Note 9 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

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

	At June 30, 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 mortgage-backed securities (MBS)	$	840,085	$	-	$	840,085	$	-
Agency commercial MBS		3,629		-		3,629		-
Securities of U.S. Government entities		171		-		171		-
Obligations of states and political subdivisions		152,154		-		152,154		-
Corporate securities		2,269,411		-		2,269,411		-
Commercial paper		299,582				299,582
Collateralized loan obligations (CLO)		143,338		-		143,338		-
Total debt securities available for sale	$	3,708,370	$	-	$	3,708,370	$	-

	At December 31, 2019
	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
U.S. Treasury securities	$	20,000	$	20,000	$	-	$	-
Securities of U.S. Government sponsored entities		111,167		-		111,167		-
Agency residential MBS		939,750		-		939,750		-
Agency commercial MBS		3,708		-		3,708		-
Securities of U.S. Government entities		544		-		544		-
Obligations of states and political subdivisions		163,139		-		163,139		-
Corporate securities		1,833,783		-		1,833,783		-
CLO		6,755		-		6,755		-
Total debt securities available for sale	$	3,078,846	$	20,000	$	3,058,846	$	-

Fair Value Measurements, Nonrecurring [Table Text Block]

									For the
									Three Months Ended
	At June 30, 2020								March 31, 2020
	Carrying Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Other real estate owned	$	43	$	-	$	-	$	43	$	-
Loans:
Commercial		5,401		-		-		5,401		-
Commercial real estate		3,773		-		-		3,773		-
Residential real estate		186		-		-		186		-
Total assets measured at fair value on a nonrecurring basis	$	9,403	$	-	$	-	$	9,403	$	-

									For the
									Twelve Months Ended
	At December 31, 2019								December 31, 2019
	Carrying Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Other real estate owned	$	43	$	-	$	-	$	43	$	-
Impaired loans:
Commercial		5,747		-		-		5,747		-
Commercial real estate		4,091		-		-		4,091		-
Residential real estate		190		-		-		190		-
Total assets measured at fair value on a nonrecurring basis	$	10,071	$	-	$	-	$	10,071	$	-

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

	At June 30, 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	$	500,820	$	500,820	$	500,820	$	-	$	-
Debt securities held to maturity		638,281		656,374		-		656,374		-
Loans		1,291,830		1,362,955		-		-		1,362,955
Financial Liabilities:
Deposits	$	5,468,412	$	5,468,734	$	-	$	5,305,647	$	163,087
Short-term borrowed funds		86,170		86,170		-		86,170		-

	At December 31, 2019
	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	$	373,421	$	373,421	$	373,421	$	-	$	-
Debt securities held to maturity		738,072		744,296		-		744,296		-
Loans		1,107,180		1,152,949		-		-		1,152,949
Financial Liabilities:
Deposits	$	4,812,621	$	4,810,934	$	-	$	4,643,284	$	167,650
Short-term borrowed funds		30,928		30,928		-		30,928		-