Estimated Fair Values (Tables)

3 Months Ended

Mar. 31, 2013

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 March 31, 2013, December 31, 2012, and March 31, 2012. 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.

	March 31, 2013				December 31, 2012				March 31, 2012
	Carrying value		Fair value		Carrying value		Fair value		Carrying value		Fair value
Cash and due from banks	$	460,217	$	460,217	$	639,730	$	639,730	$	552,663	$	552,663
Overnight investments	954,232		954,232		443,180		443,180		752,334		752,334
Investment securities available for sale	5,279,678		5,279,678		5,226,228		5,226,228		4,457,739		4,457,739
Investment securities held to maturity	1,229		1,322		1,342		1,448		1,688		1,844
Loans held for sale	86,351		88,116		86,333		87,654		73,457		75,342
Loans covered by loss share agreements, net of allowance for loan and lease losses	1,524,854		1,494,357		1,669,263		1,635,878		2,097,752		2,055,797
Loans and leases not covered by loss share agreements, net of allowance for loan and lease losses	11,332,534		11,298,475		11,397,069		11,238,597		11,303,146		11,171,217
Receivable from the FDIC for loss share agreements (1)	195,942		104,684		270,192		100,161		492,384		297,963
Income earned not collected	47,255		47,255		47,666		47,666		52,406		52,406
Stock issued by:
Federal Home Loan Bank of Atlanta	28,789		28,789		36,139		36,139		41,043		41,043
Federal Home Loan Bank of San Francisco	9,092		9,092		10,107		10,107		12,356		12,356
Federal Home Loan Bank of Seattle	4,370		4,370		4,410		4,410		4,490		4,490
Preferred stock	46,397		47,624		40,768		40,793		—		—
Deposits	18,064,921		18,099,371		18,086,025		18,126,893		17,759,492		17,810,831
Short-term borrowings	573,102		573,102		568,505		568,505		677,993		677,993
Long-term obligations	444,252		469,980		444,921		472,642		649,818		679,727
Payable to the FDIC for loss share agreements	98,870		119,473		101,641		125,065		82,033		95,643
Accrued interest payable	6,653		6,653		9,353		9,353		21,486		21,486
Interest rate swap	9,583		9,583		10,398		10,398		10,325		10,325

(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 March 31, 2013, December 31, 2012, and March 31, 2012:

			Fair value measurements using:
Description	Fair value		Level 1		Level 2		Level 3
March 31, 2013
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	749,757	$	749,757	$	—	$	—
Government agency	3,150,041		3,150,041		—		—
Other	828		828		—		—
Residential mortgage-backed securities	1,358,102		—		1,358,102		—
Equity securities	20,403		20,403		—		—
State, county, municipal	547		—		547		—
Total	$	5,279,678	$	3,921,029	$	1,358,649	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	9,583	$	—	$	9,583	$	—
December 31, 2012
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	823,632	$	823,632	$	—	$	—
Government agency	3,055,204		3,055,204		—		—
Other	820		820		—		—
Residential mortgage-backed securities	1,329,657		—		1,329,657		—
Equity securities	16,365		16,365		—		—
State, county, municipal	550		—		550		—
Total	$	5,226,228	$	3,896,021	$	1,330,207	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	10,398	$	—	$	10,398	$	—
March 31, 2012
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,065,036	$	1,065,036	$	—	$	—
Government agency	2,855,385		2,855,385		—		—
Corporate bonds	226,428		226,428		—		—
Residential mortgage-backed securities	290,908		—		290,908		—
Equity securities	18,943		18,943		—		—
State, county, municipal	1,039		—		1,039		—
Total	$	4,457,739	$	4,165,792	$	291,947	$	—
Liabilities measured at fair value
Interest rate swaps accounted for as cash flow hedges	$	10,325	$	—	$	10,325	$	—

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 March 31, 2013, December 31, 2012, and March 31, 2012:

			Fair value measurements using:
Description	Fair value		Level 1		Level 2		Level 3
March 31, 2013
Loans held for sale	$	65,164	$	—	$	65,164	$	—
Impaired loans not covered by loss share agreements	39,937		—		—		39,937
Other real estate not covered by loss share agreements remeasured during current year	1,970		—		—		1,970
December 31, 2012
Loans held for sale	65,244		—		65,244		—
Impaired loans not covered by loss share agreements	51,644		—		—		51,644
Other real estate not covered by loss share agreements remeasured during current year	21,113		—		—		21,113
March 31, 2012
Loans held for sale	45,146		—		45,146		—
Impaired loans not covered by loss share agreements	82,882		—		—		82,882
Other real estate not covered by loss share agreements remeasured during current year	8,048		—		—		8,048

Schedule of Fair Value Measurements Of Other Real Estate Opportunities

OREO is measured and reported at fair value using level 3 inputs for valuations based on unobservable criteria. The values of OREO are determined by collateral valuations. Collateral values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 10 and 14 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Changes to the value of the assets between scheduled valuation dates are monitored through continued communication with brokers and monthly reviews by the asset manager assigned to each asset. The asset manager uses the information gathered from brokers and other market sources to identify any significant changes in the market or the subject property as they occur. Valuations are then adjusted or new appraisals are ordered to ensure the reported values reflect the most current information.

No financial liabilities were carried at fair value on a nonrecurring basis as of March 31, 2013, December 31, 2012, or March 31, 2012.