Note 13 - Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

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

	September 30, 2018				December 31, 2017
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	204,178	$	204,178	$	247,056	$	247,056
Short-term investments and interest bearing deposits		377,839		377,839		292,745		292,745
Securities available-for-sale		1,283,060		1,283,060		1,333,626		1,333,626
Equity securities		23,522		23,522		-		-
Loans held for sale		-		-		8,000		8,000
Loans, net (1)		13,522,103		13,502,232		12,743,766		12,663,049
Investment in Federal Home Loan Bank stock		17,250		17,250		23,085		23,085
Warrants		168		168		91		91

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	53,361	$	400	$	108,530	$	1,832
Interest rate swaps		756,819		18,419		514,159		5,218

Financial Liabilities	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Deposits	$	13,581,078	$	13,617,846	$	12,689,893	$	12,700,674
Securities sold under agreements to repurchase		-		-		100,000		100,163
Advances from Federal Home Loan Bank		315,000		314,507		430,000		429,482
Other borrowings		35,585		33,791		52,885		51,075
Long-term debt		194,136		142,068		194,136		141,865

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	1,623	$	4	$	1,014	$	9
Foreign exchange contracts		117,634		1,648		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	$	2,645,086	$	(9,095	)	$	2,366,368	$	(7,224	)
Standby letters of credit		167,050		(1,509	)		140,814		(1,805	)
Other letters of credit		30,420		(20	)		27,353		(52	)
Bill of lading guarantees		1,108		-			24		-

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

	As of September 30, 2018
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	204,178	$	204,178	$	-	$	-
Short-term investments and interest bearing deposits		377,839		377,839		-		-
Debt securities available-for-sale		1,283,060		199,374		1,083,686		-
Equity securities		23,522		23,522		-		-
Loans, net (1)		13,502,232		-		-		13,502,232
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		168		-		-		168
Financial Liabilities
Deposits		13,617,846		-		-		13,617,846
Advances from Federal Home Loan Bank		314,507		-		314,507		-
Other borrowings		33,791		-		-		33,791
Long-term debt		142,068		-		142,068		-

	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		-