Estimated Fair Values (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Estimated Fair Values For Certain Financial Assets And Financial Liabilities

For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of September 30, 2012, December 31, 2011, and September 30, 2011. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk relating to them that would cause the fair value to differ from the carrying value.

	September 30, 2012				December 31, 2011				September 30, 2011
	Carrying value		Fair value		Carrying value		Fair value		Carrying value		Fair value
Cash and due from banks	$	606,107	$	606,107	$	590,801	$	590,801	$	539,337	$	539,337
Overnight investments	688,196		688,196		434,975		434,975		410,002		410,002
Investment securities available for sale	5,012,041		5,012,041		4,056,423		4,056,423		3,994,825		3,994,825
Investment securities held to maturity	1,459		1,583		1,822		1,980		1,943		2,108
Loans held for sale	78,610		80,357		92,539		93,235		78,178		78,178
Loans covered by loss share agreements, net of allowance for loan and lease losses	1,806,593		1,770,250		2,272,891		2,236,343		2,482,400		2,469,613
Loans and leases not covered by loss share agreements, net of allowance for loan and lease losses	11,269,183		11,127,286		11,400,754		11,312,900		11,424,392		11,329,623
Receivable from FDIC for loss share agreements (1)	243,893		50,382		539,511		446,172		607,907		500,745
Income earned not collected	51,565		51,565		42,216		42,216		43,886		43,886
Stock issued by:
Federal Home Loan Bank of Atlanta	38,105		38,105		41,042		41,042		43,302		43,302
Federal Home Loan Bank of San Francisco	11,140		11,140		12,976		12,976		13,605		13,605
Federal Home Loan Bank of Seattle	4,490		4,490		4,490		4,490		4,490		4,490
Preferred stock	20,320		20,345		—		—		—		—
Deposits	17,893,215		17,939,303		17,577,274		17,638,359		17,663,275		17,712,240
Short-term borrowings	677,773		677,773		615,222		615,222		600,384		600,384
Long-term obligations	472,170		503,369		687,599		719,999		744,839		774,799
Accrued interest payable	11,145		11,145		23,719		23,719		22,153		22,153
Interest rate swap	11,170		11,170		10,714		10,714		13,531		13,531

(1) The fair value of the receivable from FDIC for loss share agreements excludes receivable related to accretable yield in prospective periods.

Assets And Liabilities Carried At Fair Value On A Recurring Basis

For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of September 30, 2012, December 31, 2011, and September 30, 2011:

			Fair value measurements using:
Description	Fair value		Quoted prices in active markets for identical assets and liabilities (Level 1 inputs)		Quoted prices for similar assets and liabilities (Level 2 inputs)		Significant unobservable inputs (Level  3 inputs)
September 30, 2012
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	872,790	$	872,790	$	—	$	—
Government agency	2,660,747		2,660,747		—		—
Corporate bonds	51,069		51,069		—		—
Residential mortgage-backed securities	1,407,771		—		1,407,771		—
Equity securities	19,056		19,056		—		—
State, county, municipal	608		—		608		—
Total	$	5,012,041	$	3,603,662	$	1,408,379	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	11,170	$	—	$	11,170	$	—
December 31, 2011
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	887,819	$	887,819	$	—	$	—
Government agency	2,592,209		2,592,209		—		—
Corporate bonds	252,820		252,820		—		—
Residential mortgage-backed securities	307,221		—		307,221		—
Equity securities	15,313		15,313		—		—
State, county, municipal	1,041		—		1,041		—
Total	$	4,056,423	$	3,748,161	$	308,262	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	10,714	$	—	$	10,714	$	—
September 30, 2011
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	987,934	$	987,934	$	—	$	—
Government agency	2,260,909		2,260,909		—		—
Corporate bonds	404,643		404,643		—		—
Residential mortgage-backed securities	324,192		—		324,192		—
Equity securities	16,104		16,104		—		—
State, county, municipal	1,043		—		1,043		—
Total	$	3,994,825	$	3,669,590	$	325,235	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	13,531	$	—	$	13,531	$	—

Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis

For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of September 30, 2012, December 31, 2011, and September 30, 2011:

			Fair value measurements using:
Description	Fair value		Quoted prices in active markets for identical assets and liabilities (Level 1 inputs)		Quoted prices for similar assets and liabilities (Level 2 inputs)		Significant unobservable inputs (Level 3 inputs)
September 30, 2012
Loans held for sale	$	52,228	$	—	$	52,228	$	—
Impaired loans not covered by loss share agreements	30,828		—		—		30,828
December 31, 2011
Loans held for sale	63,470		—		63,470		—
Impaired loans not covered by loss share agreements	128,365		—		—		128,365
September 30, 2011
Loans held for sale	78,178		—		78,178		—
Impaired loans not covered by loss share agreements	81,661		—		—		81,661

Schedule of Fair Value Measurements Of Other Real Estate Opportunites

The following table provides information regarding OREO for the three- and nine-month periods ended September 30, 2012 and 2011.

	Three Months Ended September 30				Nine Months Ended September 30
	2012		2011		2012		2011
Current year foreclosures:
Covered under loss share agreements	$	28,187	$	28,101	$	89,817	$	92,245
Not covered under loss share agreements	8,763		16,590		27,546		30,226
Loan charge-offs recorded due to the measurement and initial recognition of OREO:
Covered under loss share agreements	1,965		7,447		10,316		7,447
Not covered under loss share agreements	1,498		1,385		2,086		2,053
Write-downs recorded subsequent to foreclosure for OREO:
Covered under loss share agreements	2,060		11,431		13,382		15,997
Not covered under loss share agreements	3,074		1,226		6,186		2,910
Fair value of OREO remeasured in current period:
Covered under loss share agreements	10,704		7,759		36,972		12,572
Not covered under loss share agreements	6,865		5,813		17,719		12,380