Note 12 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

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

	June 30, 2017				December 31, 2016
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	160,517	$	160,517	$	218,017	$	218,017
Short-term investments		393,895		393,895		967,067		967,067
Securities available-for-sale		1,368,351		1,368,351		1,314,345		1,314,345
Loans held for sale		-		-		7,500		7,500
Loans, net		11,451,635		11,379,583		11,077,315		11,006,344
Investment in Federal Home Loan Bank stock		17,250		17,250		17,250		17,250
Warrants		108		108		79		79

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	157,508	$	2,378	$	82,439	$	1,302
Interest rate swaps		206,263		1,608		361,526		938

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	11,463,317	$	11,470,912	$	11,674,726	$	11,680,017
Securities sold under agreements to repurchase		150,000		150,842		350,000		351,989
Advances from Federal Home Loan Bank		475,000		475,058		350,000		350,062
Other borrowings		17,564		15,570		17,662		15,944
Long-term debt		119,136		63,337		119,136		63,169

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	13,598	$	231	$	12,117	$	121
Foreign exchange contracts		45,869		640		89,545		3,132
Interest rate swaps		358,994		7,191		119,136		3,744

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	2,102,122	$	(6,446	)	$	2,062,241	$	(6,025	)
Standby letters of credit		97,642		(995	)		75,396		(668	)
Other letters of credit		31,498		(17	)		37,283		(16	)
Bill of lading guarantees		113		-			75		-

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

	June 30, 2017
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	160,517	$	160,517	$	-	$	-
Short-term investments		393,895		393,895		-		-
Securities available-for-sale		1,368,351		591,403		776,948		-
Loans held-for-sale		-		-		-		-
Loans, net		11,379,583		-		-		11,379,583
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		108		-		-		108
Financial Liabilities
Deposits		11,470,912		-		-		11,470,912
Securities sold under agreements to repurchase		150,842		-		150,842		-
Advances from Federal Home Loan Bank		475,058		-		475,058		-
Other borrowings		15,570		-		-		15,570
Long-term debt		63,337		-		63,337		-

	December 31, 2016
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	218,017	$	218,017	$	-	$	-
Short-term investments		967,067		967,067		-		-
Securities available-for-sale		1,314,345		513,376		800,969		-
Loans held-for-sale		7,500		-		-		7,500
Loans, net		11,006,344		-		-		11,006,344
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		79		-		-		79
Financial Liabilities
Deposits		11,680,017		-		-		11,680,017
Securities sold under agreements to repurchase		351,989		-		351,989		-
Advances from Federal Home Loan Bank		350,062		-		350,062		-
Other borrowings		15,944		-		-		15,944
Long-term debt		63,169		-		63,169		-