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Securities (Tables)
 12 Months Ended
Dec. 31, 2017
Marketable Securities [Abstract]  
Reconciliation From Amortized Cost to Estimated Fair Value of Marketable Securities
This table provides the major components of securities available for sale (“AFS”) and held to maturity (“HTM”) at amortized cost and estimated fair value at December 31, 2017 and December 31, 2016:
 
 
December 31, 2017
 
December 31, 2016
(In thousands)
 
Amortized cost
 
Gross unrealized gains
 
Gross unrealized losses
 
Estimated fair value
 
Amortized cost
 
Gross unrealized gains
 
Gross unrealized losses
 
Estimated fair value
Available for sale:
 
 
 
 
 
 
 
 
 
 

 
 

 
 

 
 

U.S. Government sponsored entities  
 
$
5,765

 
$
—

 
$
(74
)
 
$
5,691

 
$
3,744

 
$
2

 
$
(30
)
 
$
3,716

State and political subdivisions    
 
5,227

 
21

 
(56
)
 
5,192

 
5,545

 
19

 
(62
)
 
5,502

Residential mortgage-backed securities    
 
32,111

 
153

 
(386
)
 
31,878

 
21,547

 
339

 
(255
)
 
21,631

Corporate and other securities
 
10,922

 
31

 
(221
)
 
10,732

 
10,003

 
—

 
(284
)
 
9,719

Total securities available
for sale
 
$
54,025

 
$
205

 
$
(737
)
 
$
53,493

 
$
40,839

 
$
360

 
$
(631
)
 
$
40,568

Held to maturity:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government sponsored entities  
 
$
3,026

 
$
—

 
$
(93
)
 
$
2,933

 
$
3,530

 
$
—

 
$
(128
)
 
$
3,402

State and political subdivisions    
 
1,113

 
144

 
—

 
1,257

 
2,306

 
181

 
(1
)
 
2,486

Residential mortgage-backed securities    
 
3,958

 
59

 
(18
)
 
3,999

 
4,799

 
98

 
(25
)
 
4,872

Commercial mortgage-backed securities    
 
3,685

 
—

 
(142
)
 
3,543

 
3,796

 
—

 
(148
)
 
3,648

Corporate and other securities
 
4,525

 
89

 
—

 
4,614

 
6,548

 
12

 
—

 
6,560

Total securities held to
maturity
 
$
16,307

 
$
292

 
$
(253
)
 
$
16,346

 
$
20,979

 
$
291

 
$
(302
)
 
$
20,968
Schedule of Marketable Securities By Contractual Maturity
This table provides the remaining contractual maturities and yields of securities within the investment portfolios. The carrying value of securities at December 31, 2017 is distributed by contractual maturity. Mortgage-backed securities and other securities, which may have principal prepayment provisions, are distributed based on contractual maturity. Expected maturities will differ materially from contractual maturities as a result of early prepayments and calls.
 
 
Within one year
 
After one through five years
 
After five through ten years
 
After ten years
 
Total carrying value
(In thousands, except percentages)
 
Amount
 
Yield
 
Amount
 
Yield
 
Amount
 
Yield
 
Amount
 
Yield
 
Amount
 
Yield
Available for sale at fair value:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government sponsored entities  
 
$
—

 
—
%
 
$
3,699

 
1.61
%
 
$
1,992

 
2.16
%
 
$
—

 
—
%
 
$
5,691

 
1.80
%
State and political subdivisions    
 
—

 
—

 
963

 
3.30

 
1,962

 
2.57

 
2,267

 
2.69

 
5,192

 
2.76

Residential mortgage-backed securities    
 
168

 
2.55

 
718

 
1.57

 
2,745

 
2.55

 
28,247

 
2.75

 
31,878

 
2.71

Corporate and other securities
 
—

 
—

 
2,182

 
3.17

 
6,453

 
4.37

 
2,097

 
2.01

 
10,732

 
3.66

Total securities available
for sale
 
$
168

 
2.55
%
 
$
7,562

 
2.27
%
 
$
13,152

 
3.39
%
 
$
32,611

 
2.70
%
 
$
53,493

 
2.81
%
Held to maturity at cost:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government sponsored entities  
 
$
—

 
—
%
 
$
—

 
—
%
 
$
—

 
—
%
 
$
3,026

 
1.98
%
 
$
3,026

 
1.98
%
State and political subdivisions    
 
162

 
1.49

 
—

 
—

 
493

 
5.07

 
458

 
5.84

 
1,113

 
4.86

Residential mortgage-backed securities    
 
7

 
4.71

 
22

 
5.48

 
539

 
2.72

 
3,390

 
3.54

 
3,958

 
3.44

Commercial mortgage-backed securities    
 
—

 
—

 
—

 
—

 
—

 
—

 
3,685

 
2.76

 
3,685

 
2.76

Corporate and other securities
 
—

 
—

 
—

 
—

 
4,525

 
5.73

 
—

 
—

 
4,525

 
5.73

Total securities held to
maturity
 
$
169

 
1.62
%
 
$
22

 
5.48
%
 
$
5,557

 
5.38
%
 
$
10,559

 
2.92
%
 
$
16,307

 
3.75
%
Schedule of Marketable Securities In Unrealized Loss Position
The fair value of securities with unrealized losses by length of time that the individual securities have been in a continuous unrealized loss position at December 31, 2017 and December 31, 2016 are as follows:
 
 
December 31, 2017
 
 
 
 
Less than 12 months
 
12 months and greater
 
Total
(In thousands, except number in a loss position)
 
Total number in a loss position
 
Estimated fair value
 
Unrealized loss
 
Estimated fair value
 
Unrealized loss
 
Estimated fair value
 
Unrealized loss
Available for sale:
 
 
 
 

 
 

 
 

 
 
 
 

 
 

U.S. Government sponsored entities  
 
5
 
$
3,732

 
$
(40
)
 
$
1,958

 
$
(34
)
 
$
5,690

 
$
(74
)
State and political subdivisions    
 
2
 
476

 
(6
)
 
1,792

 
(50
)
 
2,268

 
(56
)
Residential mortgage-backed securities    
 
22
 
20,646

 
(218
)
 
4,028

 
(168
)
 
24,674

 
(386
)
Corporate and other securities
 
7
 
4,563

 
(37
)
 
2,803

 
(184
)
 
7,366

 
(221
)
Total temporarily impaired securities
 
36
 
$
29,417

 
$
(301
)
 
$
10,581

 
$
(436
)
 
$
39,998

 
$
(737
)
Held to maturity:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government sponsored entities  
 
2
 
$
—

 
$
—

 
$
2,933

 
$
(93
)
 
$
2,933

 
$
(93
)
Residential mortgage-backed securities    
 
2
 
—

 
—

 
979

 
(18
)
 
979

 
(18
)
Commercial mortgage-backed securities    
 
2
 
—

 
—

 
3,543

 
(142
)
 
3,543

 
(142
)
Total temporarily impaired securities
 
6
 
$
—

 
$
—

 
$
7,455

 
$
(253
)
 
$
7,455

 
$
(253
)
 
 
December 31, 2016
 
 
 
 
Less than 12 months
 
12 months and greater
 
Total
(In thousands, except number in a loss position)
 
Total number in a loss position
 
Estimated fair value
 
Unrealized loss
 
Estimated fair value
 
Unrealized loss
 
Estimated fair value
 
Unrealized loss
Available for sale:
 
 
 
 

 
 

 
 

 
 

 
 

 
 

U.S. Government sponsored entities  
 
1
 
$
1,962

 
$
(30
)
 
$
—

 
$
—

 
$
1,962

 
$
(30
)
State and political subdivisions    
 
4
 
3,833

 
(62
)
 
—

 
—

 
3,833

 
(62
)
Residential mortgage-backed securities    
 
13
 
7,813

 
(139
)
 
2,983

 
(116
)
 
10,796

 
(255
)
Corporate and other securities
 
6
 
822

 
(67
)
 
5,376

 
(217
)
 
6,198

 
(284
)
Total temporarily impaired securities
 
24
 
$
14,430

 
$
(298
)
 
$
8,359

 
$
(333
)
 
$
22,789

 
$
(631
)
Held to maturity:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government sponsored entities  
 
2
 
$
3,402

 
$
(128
)
 
$
—

 
$
—

 
$
3,402

 
$
(128
)
State and political subdivisions
 
1
 
212

 
(1
)
 
—

 
—

 
212

 
(1
)
Residential mortgage-backed securities    
 
2
 
776

 
(15
)
 
441

 
(10
)
 
1,217

 
(25
)
Commercial mortgage-backed securities    
 
2
 
3,648

 
(148
)
 
—

 
—

 
3,648

 
(148
)
Total temporarily impaired securities
 
7
 
$
8,038

 
$
(292
)
 
$
441

 
$
(10
)
 
$
8,479

 
$
(302
)
Schedule of Realized Gains (Losses) for Marketable Securities
Gross realized gains and losses on securities for the past two years are detailed in the table below:
 
 
For the years ended December 31,
(In thousands)
 
2017
 
2016
Available for sale:
 
 

 
 

Realized gains
 
$
89

 
$
302

Realized losses
 
(61
)
 
(1
)
Total securities available for sale
 
28

 
301

Held to maturity:
 
 
 
 
Realized gains
 
38

 
123

Realized losses
 
(4
)
 
—

Total securities held to maturity
 
34

 
123

Net gains on sales of securities
 
$
62

 
$
424