Note 13 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	June 30, 2018				December 31, 2017
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	195,392	$	195,392	$	247,056	$	247,056
Short-term investments and interest bearing deposits		208,749		208,749		292,745		292,745
Securities available-for-sale		1,475,949		1,475,949		1,333,626		1,333,626
Equity securities		23,131		23,131		-		-
Loans held for sale		-		-		8,000		8,000
Loans, net (1)		13,223,590		13,190,937		12,743,766		12,663,049
Investment in Federal Home Loan Bank stock		17,250		17,250		23,085		23,085
Warrants		176		176		91		91

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	62,687	$	389	$	108,530	$	1,832
Interest rate swaps		726,879		14,801		514,159		5,218

Financial Liabilities	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Deposits	$	13,104,546	$	13,121,255	$	12,689,893	$	12,700,674
Securities sold under agreements to repurchase		50,000		50,041		100,000		100,163
Advances from Federal Home Loan Bank		480,000		479,511		430,000		429,482
Other borrowings		53,397		52,276		52,885		51,075
Long-term debt		194,136		141,473		194,136		141,865

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	1,654	$	9	$	1,014	$	9
Foreign exchange contracts		92,014		2,083		32,127		453
Interest rate swaps		23,655		157		145,399		2,699

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	2,559,651	$	(2,389	)	$	2,366,368	$	(7,224	)
Standby letters of credit		169,823		(1,787	)		140,814		(1,805	)
Other letters of credit		35,196		(28	)		27,353		(52	)
Bill of lading guarantees		1,440		(1	)		24		(0	)

Schedule Of Fair Value Of Financial Instruments [Table Text Block]

	As of June 30, 2018
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	195,392	$	195,392	$	-	$	-
Short-term investments and interest bearing deposits		208,749		208,749		-		-
Debt securities available-for-sale		1,475,949		348,544		1,127,405		-
Equity securities		23,131		23,131		-		-
Loans, net (1)		13,190,937		-		-		13,190,937
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		176		-		-		176
Financial Liabilities
Deposits		13,121,255		-		-		13,121,255
Securities sold under agreement to repurchase		50,041		-		50,041		-
Advances from Federal Home Loan Bank		479,511		-		479,511		-
Other borrowings		52,276		-		-		52,276
Long-term debt		141,473		-		141,473		-

	As of December 31, 2017
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	247,056	$	247,056	$	-	$	-
Short-term investments and interest bearing deposits		292,745		292,745		-		-
Securities available-for-sale		1,333,626		277,622		1,056,004		-
Loans held-for-sale		8,000		-		-		8,000
Loans, net (1)		12,663,049		-		-		12,663,049
Investment in Federal Home Loan Bank stock		23,085		-		23,085		-
Warrants		91		-		-		91
Financial Liabilities
Deposits		12,700,674		-		-		12,700,674
Securities sold under agreement to repurchase		100,163		-		100,163		-
Advances from Federal Home Loan Bank		429,482		-		429,482		-
Other borrowings		51,075		-		-		51,075
Long-term debt		141,865		-		141,865		-