Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Estimated Fair Value Of Financial Instruments

	As of December 31, 2011				As of December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In thousands)
Financial Assets
Cash and due from banks	$	117,888	$	117,888	$	87,347	$	87,347
Short-term investments		294,956		294,956		206,321		206,321
Securities purchased under agreements to resell ..		—		—		110,000		110,000
Securities held-to-maturity		1,153,504		1,203,977		840,102		837,359
Securities available-for-sale		1,294,478		1,294,478		2,003,567		2,003,567
Trading securities		4,542		4,542		3,818		3,818
Loans held-for-sale		760		760		2,873		2,873
Loans, net		6,844,483		6,825,571		6,615,769		6,596,501
Investment in Federal Home Loan Bank stock		52,989		52,989		63,873		63,873
Warrants		218		218		40		40

	Notional Amount		Fair Value		Notional Amount		Fair Value
Option contracts	$	3,026	$	34	$	29,336	$	106
Foreign exchange contracts		238,581		2,151		112,665		4,629

Financial Liabilities	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Deposits	$	7,229,131	$	7,240,857	$	6,991,846	$	7,006,913
Securities sold under agreement to repurchase		1,400,000		1,547,900		1,561,000		1,704,585
Advances from Federal Home Loan Bank		225,000		227,825		550,000		580,054
Other borrowings		19,800		19,801		27,576		27,585
Long-term debt		171,136		98,676		171,136		114,557

	Amount		Fair Value		Notional Amount		Fair Value
Option contracts	$	1,282	$	5	$	72	$	72
Interest rate swaps		300,000		2,634		300,000		6,508
Foreign exchange contracts		128,215		486		68,355		1,873

	Notional Amount		Fair Value			Notional Amount		Fair Value
Off-Balance Sheet Financial Instruments
Commitments to extend credit	$	1,626,523	$	(1,253	)	$	1,360,266	$	(603	)
Standby letters of credit		62,076		(367	)		59,876		(282	)
Other letters of credit		64,233		(38	)		62,722		(38	)
Bill of lading guarantees		187		—			245		(1	)