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Investment Securities (Tables)
 12 Months Ended
Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale securities reconciliation
The following two tables set forth the carrying values and estimated fair values of our investment securities portfolio at the dates indicated (in thousands):
 
December 31, 2013
 
Amortized
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Estimated
Fair Value
Available-for-Sale Securities
 
 
 
 
 
 
 
Debt Securities:
 
 
 
 
 
 
 
U.S. Government agencies
$
18,172

 
$
115

 
$
(84
)
 
$
18,203

Obligations of states and political subdivisions
162,018

 
2,906

 
(6,517
)
 
158,407

U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
254,978

 
1,075

 
(2,344
)
 
253,709

Private label residential mortgage backed securities
4,344

 
1,047

 
—

 
5,391

Other equity securities
7,596

 
2

 
(84
)
 
7,514

 
$
447,108

 
$
5,145

 
$
(9,029
)
 
$
443,224


 
December 31, 2012
 
Amortized
Cost
 
Gross Unrealized
 Gains
 
Gross Unrealized 
Losses
 
Estimated
 Fair Value
Available-for-Sale Securities
 
 
 
 
 
 
 
Debt Securities:
 

 
 

 
 

 
 

U.S. Government agencies
$
9,443

 
$
34

 
$
(23
)
 
$
9,454

Obligations of states and political subdivisions
151,312

 
10,751

 
(385
)
 
161,678

U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
206,465

 
3,152

 
(1,107
)
 
208,510

Private label residential mortgage backed securities
6,258

 
323

 
(206
)
 
6,375

Other equity securities
7,596

 
352

 
—

 
7,948

`
$
381,074

 
$
14,612

 
$
(1,721
)
 
$
393,965
Securities in a continuous unrealized loss position
Investment securities with unrealized losses at December 31, 2013 and 2012 are summarized and classified according to the duration of the loss period as follows (in thousands):
 
December 31, 2013
 
Less than 12 Months
 
12 Months or More
 
Total
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Available-for-Sale Securities
 

 
 

 
 

 
 

 
 

 
 

Debt Securities:
 

 
 

 
 

 
 

 
 

 
 

U.S. Government agencies
$
4,132

 
$
(75
)
 
$
968

 
$
(9
)
 
$
5,100

 
$
(84
)
Obligations of states and political subdivisions
89,556

 
(5,007
)
 
15,015

 
(1,510
)
 
104,571

 
(6,517
)
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
148,853

 
(2,070
)
 
19,199

 
(274
)
 
168,052

 
(2,344
)
Other equity securities
7,416

 
(84
)
 
—

 
—

 
7,416

 
(84
)
 
$
249,957

 
$
(7,236
)
 
$
35,182

 
$
(1,793
)
 
$
285,139

 
$
(9,029
)
 
 
December 31, 2012
 
Less than 12 Months
 
12 Months or More
 
Total
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Available-for-Sale Securities
 

 
 

 
 

 
 

 
 

 
 

Debt Securities:
 

 
 

 
 

 
 

 
 

 
 

U.S. Government agencies
$
3,590

 
$
(23
)
 
$
—

 
$
—

 
$
3,590

 
$
(23
)
Obligations of states and political subdivisions
$
30,572

 
$
(385
)
 
$
—

 
$
—

 
$
30,572

 
$
(385
)
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
76,764

 
(809
)
 
18,024

 
(298
)
 
94,788

 
(1,107
)
Private label residential mortgage backed securities
—

 
—

 
2,886

 
(206
)
 
2,886

 
(206
)
 
$
110,926

 
$
(1,217
)
 
$
20,910

 
$
(504
)
 
$
131,836

 
$
(1,721
)
Realized gains and losses
Proceeds and gross realized gains (losses) on investment securities for the years ended December 31, 2013, 2012, and 2011 are shown below (in thousands):
 
 
Years Ended December 31,
 
 
2013
 
2012
 
2011
Available-for-Sale Securities
 
 

 
 

 
 

Proceeds from sales or calls
 
$
88,146

 
$
39,119

 
$
44,700

Gross realized gains from sales or calls
 
$
2,728

 
$
2,121

 
$
1,119

Gross realized losses from sales or calls
 
$
(1,463
)
 
$
(482
)
 
$
(821
)
Credit losses recorded in earnings
The following table provides a roll forward for the years ended December 31, 2013 and 2012 of investment securities credit losses recorded in earnings (in thousands). The beginning balance represents the credit loss component for which OTTI occurred on debt securities in prior periods.  Additions represent the first time a debt security was credit impaired or when subsequent credit impairments have occurred on securities for which OTTI credit losses have been previously recognized.
 
 
Years ended December 31,
 
 
2013
 
2012
Beginning balance
 
$
783

 
783

Amounts related to credit loss for which an OTTI charge was not previously recognized
 
17

 
—

Increases to the amount related to credit loss for which OTTI was previously recognized
 
—

 
—

Realized losses for securities sold
 
—

 
—

Ending balance
 
$
800

 
$
783
Investments by contractual maturity
The amortized cost and estimated fair value of investment securities at December 31, 2013 and 2012 by contractual maturity are shown in the two tables below (in thousands).  Expected maturities will differ from contractual maturities because the issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties.
December 31, 2013
 
Amortized 
Cost
 
Estimated 
Fair Value
Within one year
 
$
—

 
$
—

After one year through five years
 
1,769

 
1,939

After five years through ten years
 
22,099

 
22,687

After ten years
 
138,150

 
133,781

 
 
162,018

 
158,407

Investment securities not due at a single maturity date:
 
 

 
 

U.S. Government agencies
 
18,172

 
18,203

U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
 
254,978

 
253,709

Private label residential mortgage backed securities
 
4,344

 
5,391

Other equity securities
 
7,596

 
7,514

 
 
$
447,108

 
$
443,224

 
December 31, 2012
 
Amortized 
Cost
 
Estimated 
Fair Value
Within one year
 
$
150

 
$
151

After one year through five years
 
10,355

 
11,250

After five years through ten years
 
20,256

 
22,176

After ten years
 
120,551

 
128,101

 
 
151,312

 
161,678

Investment securities not due at a single maturity date:
 
 

 
 

U.S. Government agencies
 
9,443

 
9,454

U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
 
206,465

 
208,510

Private label residential mortgage backed securities
 
6,258

 
6,375

Other equity securities
 
7,596

 
7,948

Total
 
$
381,074

 
$
393,965