Note 13 - Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

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

	September 30, 2017				December 31, 2016
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	167,886	$	167,886	$	218,017	$	218,017
Short-term investments		573,059		573,059		967,067		967,067
Securities available-for-sale		1,368,487		1,368,487		1,314,345		1,314,345
Loans held for sale		-		-		7,500		7,500
Loans, net		12,472,475		12,403,100		11,077,315		11,006,344
Investment in Federal Home Loan Bank stock		21,948		21,948		17,250		17,250
Investment in Federal Reserve Bank stock		8,733		8,733		-		-
Warrants		97		97		79		79

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	69,278	$	1,725	$	82,439	$	1,302
Interest rate swaps		155,671		2,314		361,526		938

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	12,561,695	$	12,573,127	$	11,674,726	$	11,680,017
Securities sold under agreements to repurchase		100,000		100,549		350,000		351,989
Advances from Federal Home Loan Bank		595,000		595,037		350,000		350,062
Other borrowings		153,574		151,643		17,662		15,944
Long-term debt		119,136		68,056		119,136		63,169

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	12,307	$	234	$	12,117	$	121
Foreign exchange contracts		86,625		1,083		89,545		3,132
Interest rate swaps		510,841		5,049		119,136		3,744

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	2,287,498	$	(6,924	)	$	2,062,241	$	(6,025	)
Standby letters of credit		140,682		(1,699	)		75,396		(668	)
Other letters of credit		41,868		(218	)		37,283		(16	)
Bill of lading guarantees		24		-			75		-

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

	September 30, 2017
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	167,886	$	167,886	$	-	$	-
Short-term investments		573,059		573,059		-		-
Securities available-for-sale		1,368,487		434,453		934,034		-
Loans held-for-sale		-		-		-		-
Loans, net		12,403,100		-		-		12,403,100
Investment in Federal Home Loan Bank stock		21,948		-		21,948		-
Investment in Federal Reserve Bank stock		8,733		-		8,733		-
Warrants		97		-		-		97
Financial Liabilities
Deposits		12,573,127		-		-		12,573,127
Securities sold under agreements to repurchase		100,549		-		100,549		-
Advances from Federal Home Loan Bank		595,037		-		595,037		-
Other borrowings		151,643		-		-		151,643
Long-term debt		68,056		-		68,056		-

	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		-