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Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2011
Fair Value Disclosures [Abstract]  
Recurring Fair Value Measurements
The following table presents the balances of assets and liabilities measured at fair value on a recurring basis at December 31, 2011 and 2010:

December 31, 2011
 
 
 
 
 
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total
Available-for-sale securities
$
3,299

 
$
3,262,715

 
$
87,539

 
$
3,353,553

Residential loans held for sale

 
30,077

 

 
30,077

Derivative assets

 
62,056

 

 
62,056

Total assets at fair value on a recurring basis
$
3,299

 
$
3,354,848

 
$
87,539

 
$
3,445,686

Derivative liabilities
$

 
$
86,106

 
$

 
$
86,106

True up liability

 

 
11,551

 
11,551

Total liabilities at fair value on a recurring basis
$

 
$
86,106

 
$
11,551

 
$
97,657

Note: There were no significant transfers between Levels 1 and 2 of the hierarchy during the year ended December 31, 2011.
December 31, 2010
 
 
 
 
 
 
 
 
Level 1
 
Level 2
 
Level 3
 
Total
Available-for-sale securities
$
3,922

 
$
2,922,774

 
$
60,344

 
$
2,987,040

Residential loans held for sale

 
41,340

 

 
41,340

Derivative assets

 
47,764

 

 
47,764

Total assets at fair value on a recurring basis
$
3,922

 
$
3,011,878

 
$
60,344

 
$
3,076,144

Derivative liabilities
$

 
$
72,824

 
$

 
$
72,824

True up liability

 

 
12,061

 
12,061

Total liabilities at fair value on a recurring basis
$

 
$
72,824

 
$
12,061

 
$
84,885

Fair value measurements from third party pricing service or independent brokers
The fair value detail by level in the fair value hierarchy as of December 31, 2011 is shown in the table below.
 
Level 2
 
Level 3
 
# Issues
 
Fair Value
 
# Issues
 
Fair Value
U.S.government agency debentures
7

 
$
123,069

 

 
$

U.S States and political subdivisions
523

 
357,731

 

 

Residential mortgage-backed securities:

 

 

 

U.S. government agencies
191

 
1,460,343

 

 

Residential collateralized mortgage-backed securities:

 

 

 

U.S. government agencies
105

 
1,137,834

 
1

 

Non-agency
1

 
2

 
4

 
43,305

Commercial collateralized mortgage obligations:
 
 
 
 
 
 
 
U.S. government agencies
12

 
129,127

 

 

Corporate debt securities
14

 
54,609

 
8

 
44,234

 
853

 
$
3,262,715

 
13

 
$
87,539

Summary of changes in Level 3 assets and liabilities measured at fair value
The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the year ended December 31, 2011 are summarized as follows:
 
Available-for-sale securities
 
True-up liability
Balance at December 31, 2009
$
42,447

 
$

Gains included in earnings

 
614

Unrealized gains (a)
17,897

 

Purchases

 
11,447

Sales

 

Settlements

 

Net transfers into (out of) Level 3

 

Balance at December 31, 2010
$
60,344

 
$
12,061

Losses included in earnings

 
(510
)
Unrealized losses (a)
(1,065
)
 

Purchases
83,876

 

Sales
(44,924
)
 

Settlements
(10,692
)
 

Net transfers into (out of) Level 3

 

Balance at December 31, 2011
$
87,539

 
$
11,551

Assets measured at fair value on a nonrecurring basis
The following table presents the balances of assets and liabilities measured at fair value on a nonrecurring basis at December 31, 2011:

 
December 31, 2011
 
December 31, 2010
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Mortgage servicing rights
$

 
$

 
$
17,749

 
$
17,749

 
$

 
$

 
$

 
$

Impaired and nonaccrual loans

 

 
75,992

 
75,992

 

 

 
140,990

 
140,990

Other property (1)

 

 
18,933

 
18,933

 

 

 
22,974

 
22,974

Other real estate covered by loss share

 

 
62,737

 
62,737

 

 

 
59,132

 
59,132

Total assets at fair value on a nonrecurring basis
$

 
$

 
$
175,411

 
$
175,411

 
$

 
$

 
$
223,096

 
$
223,096

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair Value of Financial Instruments
The carrying amount and fair value of the Corporation’s financial instruments are as follows:
 
 
At December 31,
 
 
2011
 
2010
 
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
Financial assets:
 
 
 
 
 
 
 
 
Cash and due from banks
$
377,319

 
$
377,319

 
$
523,113

 
$
523,113

 
Investment securities
3,494,389

 
3,579,390

 
3,154,333

 
3,207,754

 
Loan held for sale
30,077

 
30,077

 
41,340

 
41,340

 
Net noncovered loans
7,641,245

 
7,373,801

 
7,087,398

 
6,716,214

 
Net covered loans and loss share receivable
1,460,723

 
1,460,723

 
1,963,021

 
1,963,021

 
Accrued interest receivable
42,274

 
42,274

 
41,830

 
41,830

 
Mortgage servicing rights
17,640

 
17,749

 
21,317

 
21,579

 
Derivative assets
62,056

 
62,056

 
47,764

 
47,764

 
 
 
 
 
 
 
 
 
Financial liabilities:
 
 
 
 
 
 
 
 
Deposits
11,431,609

 
11,445,777

 
11,268,006

 
11,275,440

 
Federal funds purchased and securities sold under agreements to repurchase
866,265

 
866,265

 
777,585

 
782,668

 
Wholesale borrowings
203,462

 
211,623

 
326,007

 
329,465

 
Accrued interest payable
3,915

 
3,915

 
6,560

 
6,560

 
Derivative liabilities
86,106

 
86,106

 
72,824

 
72,824

 
True up liability
11,551

 
11,551

 
12,061

 
12,061

Summary of Change in fair value carrying amount of residential mortgages
As of December 31, 2011 and 2010, the aggregate fair value, contractual balance and gain or loss on loans held for sale was as follows:
 
 
December 31, 2011
 
December 31, 2010
Aggregate fair value
 
$
30,077

 
$
41,340

Contractual balance
 
28,948

 
41,024

Gain
 
1,129

 
316