Note 13 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

	March 31, 2018				December 31, 2017
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	199,713	$	199,713	$	247,056	$	247,056
Short-term investments and interest bearing deposits		524,012		524,012		292,745		292,745
Securities available-for-sale		1,241,105		1,241,105		1,333,626		1,333,626
Equity securities		24,154		24,154		-		-
Loans held for sale		-		-		8,000		8,000
Loans, net (1)		12,889,166		12,908,391		12,743,766		12,663,049
Investment in Federal Home Loan Bank stock		17,250		17,250		23,085		23,085
Warrants		195		195		91		91

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	78,021	$	1,539	$	108,530	$	1,832
Interest rate swaps		681,055		11,674		514,159		5,218

Financial Liabilities	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Deposits	$	13,012,251	$	13,032,828	$	12,689,893	$	12,700,674
Securities sold under agreements to repurchase		100,000		99,783		100,000		100,163
Advances from Federal Home Loan Bank		325,000		324,548		430,000		429,482
Other borrowings		53,178		51,367		52,885		51,075
Long-term debt		194,136		141,266		194,136		141,865

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	1,028	$	3	$	1,014	$	9
Foreign exchange contracts		57,648		924		32,127		453
Interest rate swaps		-		-		145,399		2,699

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	2,487,710	$	(7,711	)	$	2,366,368	$	(7,224	)
Standby letters of credit		142,674		(1,418	)		140,814		(1,805	)
Other letters of credit		25,885		(13	)		27,353		(52	)
Bill of lading guarantees		24		(0	)		24		(0	)

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

	As of March 31, 2018
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	199,713	$	199,713	$	-	$	-
Short-term investments and interest bearing deposits		524,012		524,012		-		-
Debt securities available-for-sale		1,241,105		124,595		1,116,510		-
Equity securities		24,154		24,154		-		-
Loans, net (1)		12,908,391		-		-		12,908,391
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		195		-		-		195
Financial Liabilities
Deposits		13,032,828		-		-		13,032,828
Securities sold under agreement to repurchase		99,783		-		99,783		-
Advances from Federal Home Loan Bank		324,548		-		324,548		-
Other borrowings		51,367		-		-		51,367
Long-term debt		141,266		-		141,266		-

	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		-