Note 12 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

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

	June 30, 2016				December 31, 2015
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	229,411	$	229,411	$	180,130	$	180,130
Short-term investments		706,927		706,927		536,880		536,880
Securities available-for-sale		1,241,904		1,241,904		1,586,352		1,586,352
Loans held for sale		2,925		2,925		6,676		6,676
Loans, net		10,393,473		10,328,509		10,016,227		9,938,810
Investment in Federal Home Loan Bank stock		17,250		17,250		17,250		17,250
Warrants		90		90		62		62

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Foreign exchange contracts	$	85,098	$	2,083	$	100,602	$	3,339

	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial Liabilities
Deposits	$	10,471,103	$	10,482,519	$	10,509,087		10,509,879
Securities sold under agreements to repurchase		400,000		410,608		400,000		413,417
Advances from Federal Home Loan Bank		555,000		555,156		275,000		274,488
Other borrowings		17,748		15,861		18,593		16,684
Long-term debt		119,136		61,437		119,136		58,420

	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Option contracts	$	-	$	-	$	9,396	$	28
Foreign exchange contracts		84,432		1,602		115,418		4,124
Interest rate swaps		479,683		18,050		459,416		6,496

	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	2,040,070	$	(5,639	)	$	1,971,848	$	(5,570	)
Standby letters of credit		76,574		(300	)		49,081		(194	)
Other letters of credit		29,272		(20	)		38,131		(22	)
Bill of lading guarantees		51		(1	)		454		(1	)

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

	June 30, 2016
	Estimated
	Fair Value
	Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	229,411	$	229,411	$	-	$	-
Short-term investments		706,927		706,927		-		-
Securities available-for-sale		1,241,904		245,992		995,912		-
Loans held-for-sale		2,925		-		-		2,925
Loans, net		10,328,509		-		-		10,328,509
Investment in Federal Home Loan Bank stock		17,250		-		17,250		-
Warrants		90		-		-		90
Financial Liabilities
Deposits		10,482,519		-		-		10,482,519
Securities sold under agreements to repurchase		410,608		-		410,608		-
Advances from Federal Home Loan Bank		555,156		-		555,156		-
Other borrowings		15,861		-		-		15,861
Long-term debt		61,437		-		61,437		-

	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		-