Note 12 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

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

	March 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	155,525	$	155,525	$	144,909	$	144,909
Short-term investments		215,794		215,794		411,983		411,983
Securities held-to-maturity		-		-		773,768		823,906
Securities available-for-sale		2,190,296		2,190,296		1,291,480		1,291,480
Trading securities		4,758		4,758		4,703		4,703
Loans, net		7,175,462		7,119,348		7,235,587		7,169,732
Investment in Federal Home Loan Bank stock		37,130		37,130		41,272		41,272
Warrants		98		98		104		104

	Notional Amount		Fair Value		Notional Amount		Fair Value
Option contracts	$	1,113	$	8	$	105	$	-
Foreign exchange contracts		211,674		2,987		188,145		2,924

	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Deposits	$	7,425,674	$	7,431,517	$	7,383,225	$	7,389,015
Securities sold under agreements to repurchase		1,150,000		1,244,735		1,250,000		1,361,585
Advances from Federal Home Loan Bank		126,200		126,962		146,200		146,789
Other borrowings		19,232		16,232		18,713		14,573
Long-term debt		171,136		101,715		171,136		98,392

	Notional Amount		Fair Value		Notional Amount		Fair Value
Option contracts	$	465	$	2	$	104	$	2
Foreign exchange contracts		165,603		1,850		133,669		1,586

	Notional Amount		Fair Value			Notional Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	1,762,592	$	(1,867	)	$	1,740,463	$	(1,875	)
Standby letters of credit		45,814		(173	)		44,672		(204	)
Other letters of credit		57,750		(33	)		71,073		(34	)
Bill of lading guarantees		128		-			77		-

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

	March 31, 2013
	Estimated Fair Value Measurements		Level 1		Level 2		Level 3
	(In thousands)
Financial Assets
Cash and due from banks	$	155,525	$	155,525	$	-	$	-
Short-term investments		215,794		215,794		-		-
Securities available-for-sale		2,190,296		366,149		1,824,147		-
Trading securities		4,758		-		4,758		-
Loans, net		7,119,348		-		-		7,119,348
Investment in Federal Home Loan Bank stock		37,130		-		37,130		-
Warrants		98		-		-		98
Financial Liabilities
Deposits		7,431,517		-		-		7,431,517
Securities sold under agreements to repurchase		1,244,735		-		1,244,735		-
Advances from Federal Home Loan Bank		126,962		-		126,962		-
Other borrowings		16,232		-		-		16,232
Long-term debt		101,715		-		101,715		-

	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		-