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Fair Value Accounting and Measurement (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Financial Assets And Liabilities Accounted For Fair Value On Recurring Basis
The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at December 31, 2012 and 2011 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement:
 
 
Fair value  at
December 31, 2012
 
Fair Value Measurements at Reporting Date Using
 
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
Securities available for sale
 
 
 
 
 
 
 
 
U.S. government agency and sponsored enterprise mortgage-back securities and collateralized mortgage obligations
 
$
572,369

 
$

 
$
572,369

 
$

State and municipal securities
 
285,575

 

 
285,575

 

U.S. government agency and government-sponsored enterprise securities
 
120,501

 

 
120,501

 

U.S. government securities
 
19,828

 
19,828

 

 

Other securities
 
3,392

 

 
3,392

 

Total securities available for sale
 
$
1,001,665

 
$
19,828

 
$
981,837

 
$

Other assets (Interest rate contracts)
 
$
14,921

 
$

 
$
14,921

 
$

Liabilities
 
 
 
 
 
 
 
 
Other liabilities (Interest rate contracts)
 
$
14,921

 
$

 
$
14,921

 
$

 
 
Fair value  at
December 31, 2011
 
Fair Value Measurements at Reporting Date Using
 
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
Securities available for sale
 
 
 
 
 
 
 
 
U.S. government agency and sponsored enterprise mortgage-back securities and collateralized mortgage obligations
 
$
695,954

 
$

 
$
695,954

 
$

State and municipal debt securities
 
285,763

 

 
285,763

 

U.S. government agency and government-sponsored enterprise securities
 
43,063

 

 
43,063

 

Other securities
 
3,330

 

 
3,330

 

Total securities available for sale
 
$
1,028,110

 
$

 
$
1,028,110

 
$

Other assets (Interest rate contracts)
 
$
16,302

 
$

 
$
16,302

 
$

Liabilities
 
 
 
 
 
 
 
 
Other liabilities (Interest rate contracts)
 
$
16,302

 
$

 
$
16,302

 
$

Financial Assets Accounted For Fair Value On Nonrecurring Basis
The following table sets forth the Company’s assets that were measured using fair value estimates on a nonrecurring basis at December 31, 2012 and 2011:
 
 
Fair value  at
December 31, 2012
 
Fair Value Measurements at Reporting Date Using
 
Losses During the Year Ended
December 31, 2012
 
 
Level 1
 
Level 2
 
Level 3
 
 
 
(in thousands)
Impaired loans
 
$
10,599

 
$

 
$

 
$
10,599

 
$
3,891

Noncovered OREO
 
10,970

 

 

 
10,970

 
3,788

Covered OREO
 
2,663

 

 

 
2,663

 
1,032

Noncovered OPPO
 
210

 

 

 
210

 
39

 
 
$
24,442

 
$

 
$

 
$
24,442

 
$
8,750

 
 
Fair value  at
December 31, 2011
 
Fair Value Measurements at Reporting Date Using
 
Losses During the Year Ended
December 31, 2011
 
 
Level 1
 
Level 2
 
Level 3
 
 
 
(in thousands)
Impaired loans
 
$
17,755

 
$

 
$

 
$
17,755

 
$
5,841

Noncovered OREO
 
11,233

 

 

 
11,233

 
3,089

Covered OREO
 
2,442

 

 

 
2,442

 
644

 
 
$
31,430

 
$

 
$

 
$
31,430

 
$
9,574

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]
The range and weighted-average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets during 2012, along with the valuation techniques used, are shown in the following table:
 
 
Fair value  at
December 31, 2012
 
Valuation Technique
 
Unobservable Input
 
Range (Weighted Average) (1)
 
 
(dollars in thousands)
Impaired loans - real estate collateral
 
$
10,099

 
Fair Market Value of Collateral
 
Adjustment to Appraisal Value
 
N/A (2)
Impaired loans - other collateral (3)
 
500

 
Fair Market Value of Collateral
 
Adjustment to Stated Value
 
N/A (2)
Noncovered OREO
 
10,970

 
Fair Market Value of Collateral
 
Adjustment to Appraisal Value
 
N/A (2)
Covered OREO
 
2,663

 
Fair Market Value of Collateral
 
Adjustment to Appraisal Value
 
N/A (2)
Noncovered OPPO
 
210

 
Fair Market Value of Collateral
 
Adjustment to Appraisal Value
 
N/A (2)
(1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable and inventory).
(2) Quantitative disclosures are not provided for impaired loans collateralized by real estate, impaired loans collateralized by non real estate collateral, noncovered OREO, covered OREO and noncovered OPPO because there were no adjustments made to the appraisal value during the current period.
(3) Other collateral consists of accounts receivable and inventory.
Fair Value, by Balance Sheet Grouping
The following table summarizes carrying amounts and estimated fair values of selected financial instruments:
 
 
 
December 31,
2012
 
December 31,
2011
 
 
Carrying
Amount
 
Fair
Value
 
Level 1
 
Level 2
 
Level 3
 
Carrying
Amount
 
Fair
Value
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and due from banks
 
$
124,573

 
$
124,573

 
$
124,573

 
$

 
$

 
$
91,364

 
$
91,364

Interest-earning deposits with banks
 
389,353

 
389,353

 
389,353

 

 

 
202,925

 
202,925

Securities available for sale
 
1,001,665

 
1,001,665

 
19,828

 
981,837

 

 
1,028,110

 
1,028,110

FHLB stock
 
21,819

 
21,819

 

 
21,819

 

 
22,215

 
22,215

Loans held for sale
 
2,563

 
2,563

 

 
2,563

 

 
2,148

 
2,148

Loans
 
2,864,803

 
2,944,317

 

 

 
2,944,317

 
2,827,259

 
2,957,345

FDIC loss-sharing asset
 
96,354

 
26,543

 

 

 
26,543

 
175,071

 
71,788

Interest rate contracts
 
14,921

 
14,921

 

 
14,921

 

 
16,302

 
16,302

Liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deposits
 
$
4,042,085

 
$
4,043,221

 
$
3,549,821

 
$
493,400

 
$

 
$
3,815,529

 
$
3,817,013

FHLB advances
 
6,644

 
5,894

 

 
5,894

 

 
119,009

 
119,849

Repurchase agreements
 
25,000

 
26,464

 

 
26,464

 

 
25,000

 
26,580

Interest rate contracts
 
14,921

 
14,921

 

 
14,921

 

 
16,302

 
16,302