Note 12 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

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

	June 30,2013				31-Dec-12
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	133,003	$	133,003	$	144,909	$	144,909
Short-term investments		139,840		139,840		411,983		411,983
Securities held-to-maturity		-		-		773,768		823,906
Securities available-for-sale		2,018,305		2,018,305		1,291,480		1,291,480
Trading securities		4,816		4,816		4,703		4,703
Loans, net		7,502,955		7,418,305		7,235,587		7,169,732
Investment in Federal Home Loan Bank stock		32,918		32,918		41,272		41,272
Warrants		72		72		104		104

	Notional Amount		Fair Value		Notional Amount		Fair Value
Option contracts	$	510	$	55	$	105	$	-
Foreign exchange contracts		210,727		3,177		188,145		2,924

	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Liabilities
Deposits	$	7,710,521	$	7,711,375	$	7,383,225	$	7,389,015
Securities sold under agreements to repurchase		950,000		1,019,835		1,250,000		1,361,585
Advances from Federal Home Loan Bank		126,200		126,310		146,200		146,789
Other borrowings		19,190		14,680		18,713		14,573
Long-term debt		171,136		97,375		171,136		98,392

	Notional Amount		Fair Value		Notional Amount		Fair Value
Option contracts	$	-	$	-	$	104	$	2
Foreign exchange contracts		233,122		6,233		133,669		1,586

	Notional Amount		Fair Value			Notional Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	1,856,698	$	(2,281	)	$	1,740,463	$	(1,875	)
Standby letters of credit		48,282		(156	)		44,672		(204	)
Other letters of credit		65,758		(33	)		71,073		(34	)
Bill of lading guarantees		187		-			77		-

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

	June 30, 2013
	Estimated Fair Value Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	133,003	$	133,003	$	-	$	-
Short-term investments		139,840		139,840		-		-
Securities available-for-sale		2,018,305		415,874		1,602,431		-
Trading securities		4,816		-		4,703		113
Loans, net		7,418,305		-		-		7,418,305
Investment in Federal Home Loan Bank stock		32,918		-		32,918		-
Warrants		72		-		-		72
Financial Liabilities
Deposits		7,716,124		-		-		7,716,124
Securities sold under agreements to repurchase		1,019,835		-		1,019,835		-
Advances from Federal Home Loan Bank		126,310		-		126,310		-
Other borrowings		14,680		-		-		14,680
Long-term debt		97,375		-		97,375		-

	December 31, 2012
	Estimated Fair Value Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	144,909	$	144,909	$	-	$	-
Short-term investments		411,983		411,983		-		-
Securities held-to-maturity		823,906		-		823,906		-
Securities available-for-sale		1,291,480		526,165		765,315		-
Trading securities		4,703		-		4,703		-
Loans, net		7,169,732		-		-		7,169,732
Investment in Federal Home Loan Bank stock		41,272		-		41,272		-
Warrants		104		-		-		104
Financial Liabilities
Deposits		7,389,015		-		-		7,389,015
Securities sold under agreements to repurchase		1,361,585		-		1,361,585		-
Advances from Federal Home Loan Bank		146,789		-		146,789		-
Other borrowings		14,573		-		-		14,573
Long-term debt		98,392		-		98,392		-