Deposits (Tables)

9 Months Ended

Sep. 30, 2011

Deposits [Abstract]

Deposits

	September 30, 2011		Percentage of Total			December 31, 2010		Percentage of Total			September 30, 2010		Percentage of Total
Non-interest-bearing demand deposits:
Commercial and individual	$	5,759,723		35.8	%	$	4,791,149		33.1	%	$	4,774,943		32.9	%
Correspondent banks		350,082		2.2			361,100		2.5			312,372		2.1
Public funds		431,434		2.7			208,187		1.4			207,678		1.4
Total non-interest-bearing demand deposits		6,541,239		40.7			5,360,436		37.0			5,294,993		36.4
Interest-bearing deposits:
Private accounts:
Savings and interest checking		2,579,745		16.1			2,505,143		17.3			2,302,753		15.9
Money market accounts		5,469,492		34.0			4,949,764		34.2			5,357,511		36.9
Time accounts of $100,000 or more		581,192		3.6			611,836		4.2			604,477		4.2
Time accounts under $100,000		546,583		3.4			571,447		4.0			586,158		4.0
Total private accounts		9,177,012		57.1			8,638,190		59.7			8,850,899		61.0
Public funds:
Savings and interest checking		164,183		1.0			255,605		1.8			184,429		1.2
Money market accounts		46,099		0.3			84,093		0.6			97,225		0.7
Time accounts of $100,000 or more		132,657		0.9			137,506		0.9			99,751		0.7
Time accounts under $100,000		2,683		—			3,512		—			2,790		—
Total public funds		345,622		2.2			480,716		3.3			384,195		2.6
Total interest-bearing deposits		9,522,634		59.3			9,118,906		63.0			9,235,094		63.6
Total deposits	$	16,063,873		100.0	%	$	14,479,342		100.0	%	$	14,530,087		100.0	%

Additional Information About Corporation's Deposits

	September 30, 2011		December 31, 2010		September 30, 2010
Money market deposits obtained through brokers	$	28,246	$	24,700	$	324,106
Deposits from the Certificate of Deposit Account Registry Service (CDARS) deposits		60,979		60,972		61,819
Deposits from foreign sources (primarily Mexico)		729,933		748,255		776,448