Note 12 - Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

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

	September 30, 2016				December 31, 2015
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	203,877	$	203,877	$	180,130	$	180,130
Short-term investments		791,757		791,757		536,880		536,880
Securities available-for-sale		1,298,469		1,298,469		1,586,352		1,586,352
Loans held for sale		4,750		4,750		6,676		6,676
Loans, net		10,886,996		10,825,059		10,016,227		9,938,810
Investment in Federal Home Loan Bank stock		18,900		18,900		17,250		17,250
Warrants		75		75		62		62

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts.	$	107,064	$	1,711	$	100,602	$	3,339

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	10,938,696	$	10,946,853	$	10,509,087	$	10,509,879
Securities sold under agreements to repurchase		350,000		355,422		400,000		413,417
Advances from Federal Home Loan Bank		700,000		700,130		275,000		274,488
Other borrowings		17,705		15,903		18,593		16,684
Long-term debt		119,136		62,628		119,136		58,420

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	-	$	-	$	9,396	$	28
Foreign exchange contracts		44,985		712		115,418		4,124
Interest rate swaps		477,479		15,186		459,416		6,496

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	1,950,756	$	(5,844	)	$	1,971,848	$	(5,570	)
Standby letters of credit		74,612		(839	)		49,081		(194	)
Other letters of credit		31,331		(69	)		38,131		(22	)
Bill of lading guarantees		-		-			454		(1	)

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

	September 30, 2016
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	203,877	$	203,877	$	-	$	-
Short-term investments		791,757		791,757		-		-
Securities available-for-sale		1,298,469		395,935		902,534		-
Loans held-for-sale		4,750		-		-		4,750
Loans, net		10,825,059		-		-		10,825,059
Investment in Federal Home Loan Bank stock		18,900		-		18,900		-
Warrants		75		-		-		75
Financial Liabilities
Deposits		10,946,853		-		-		10,946,853
Securities sold under agreements to repurchase		355,422		-		355,422		-
Advances from Federal Home Loan Bank		700,130		-		700,130		-
Other borrowings .		15,903		-		-		15,903
Long-term debt		62,628		-		62,628		-

	December 31, 2015
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	180,130	$	180,130	$	-	$	-
Short-term investments		536,880		536,880		-		-
Securities available-for-sale		1,586,352		290,121		1,296,231		-
Loans held-for-sale		6,676		-		-		6,676
Loans, net		9,938,810		-		-		9,938,810
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		62		-		-		62
Financial Liabilities
Deposits		10,509,879		-		-		10,509,879
Securities sold under agreements to repurchase		413,417		-		413,417		-
Advances from Federal Home Loan Bank		274,488		-		-		274,488
Other borrowings		16,684		-		-		16,684
Long-term debt		58,420		-		58,420		-