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SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Securities and Held-to-maturity Securties
The following table presents a summary of the amortized cost, gross unrealized holding gains and losses and fair value of securities available for sale and securities held to maturity for the periods indicated:
 
December 31, 2016
 
December 31, 2015
 
Amortized
Cost
Gross
Unrealized
Gains
Gross Unrealized
Losses
Fair
Value
 
Amortized
Cost
Gross
Unrealized
Gains
Gross Unrealized
Losses
Fair
Value
 
(Dollars in thousands)
Available for sale securities
 
 
 
 
 
 
 
 
 
U.S. government agency securities
$
24,006

$
238

$
—

$
24,244

 
$
29,958

$
261

$
(4
)
$
30,215

Agency mortgage-backed securities
173,268

2,852

(736
)
175,384

 
207,693

4,227

(983
)
210,937

Agency collateralized mortgage obligations
101,094

106

(1,332
)
99,868

 
64,157

179

(752
)
63,584

State, county, and municipal securities
3,743

50

—

3,793

 
4,543

116

—

4,659

Single issuer trust preferred securities issued by banks
2,311

3

(3
)
2,311

 
2,865

8

(81
)
2,792

Pooled trust preferred securities issued by banks and insurers
2,200

—

(616
)
1,584

 
2,217

—

(645
)
1,572

Small business administration pooled securities
37,561

—

(372
)
37,189

 
40,472

87

(110
)
40,449

Equity securities
19,183

641

(553
)
19,271

 
13,235

374

(568
)
13,041

Total available for sale securities
363,366

3,890

(3,612
)
363,644

 
365,140

5,252

(3,143
)
367,249

Held to maturity securities
 
 
 
 
 
 
 
 
 
U.S. treasury securities
1,007

47

—

1,054

 
1,009

55

—

1,064

Agency mortgage-backed securities
156,088

2,274

(858
)
157,504

 
167,134

3,460

(219
)
170,375

Agency collateralized mortgage obligations
297,445

1,002

(3,797
)
294,650

 
267,348

1,195

(3,652
)
264,891

State, county, and municipal securities
—

—

—

—

 
225

2

—

227

Single issuer trust preferred securities issued by banks
1,500

44

—

1,544

 
1,500

22

—

1,522

Small business administration pooled securities
31,036

189

(327
)
30,898

 
35,291

437

(64
)
35,664

Corporate debt securities
—

—

—

—

 
5,000

6

—

5,006

Total held to maturity securities
487,076

3,556

(4,982
)
485,650

 
477,507

5,177

(3,935
)
478,749

Total
$
850,442

$
7,446

$
(8,594
)
$
849,294

 
$
842,647

$
10,429

$
(7,078
)
$
845,998
Schedule of Contractual Maturities of Securities
A schedule of the contractual maturities of securities available for sale and securities held to maturity as of December 31, 2016 is presented below:
 
Available for Sale
 
Held to Maturity
 
Amortized
Cost
 
Fair
Value
 
Amortized
Cost
 
Fair
Value
 
(Dollars in thousands)
Due in one year or less
$
999

 
$
1,001

 
$
1

 
$
1

Due after one year to five years
29,144

 
29,419

 
16,007

 
16,228

Due after five to ten years
97,144

 
97,421

 
22,664

 
23,309

Due after ten years
216,896

 
216,532

 
448,404

 
446,112

Total debt securities
344,183

 
344,373

 
487,076

 
485,650

Equity securities
19,183

 
19,271

 
—

 
—

Total
$
363,366


$
363,644

 
$
487,076

 
$
485,650
Schedule of Gross Unrealized Losses and Fair Value of Investments
The following tables show the gross unrealized losses and fair value of the Company’s investments in an unrealized loss position, which the Company has not deemed to be OTTI, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:

 
 
 
December 31, 2016
 
 
 
Less than 12 months
 
12 months or longer
 
Total
Description of securities
# of
holdings
 
Fair Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair Value
 
Unrealized
Losses
 
 
 
(Dollars in thousands)
Agency mortgage-backed securities
57

 
$
137,949

 
$
(1,594
)
 
$
—

 
$
—

 
$
137,949

 
$
(1,594
)
Agency collateralized mortgage obligations
32

 
243,051

 
(3,140
)
 
47,403

 
(1,989
)
 
290,454

 
(5,129
)
Single issuer trust preferred securities issued by banks and insurers
1

 
—

 
—

 
1,036

 
(3
)
 
1,036

 
(3
)
Pooled trust preferred securities issued by banks and insurers
1

 
—

 
—

 
1,583

 
(616
)
 
1,583

 
(616
)
Small business administration pooled securities
5

 
59,846

 
(699
)
 
—

 
—

 
59,846

 
(699
)
Equity securities
25

 
3,625

 
(77
)
 
6,334

 
(476
)
 
9,959

 
(553
)
Total temporarily impaired securities
121

 
$
444,471

 
$
(5,510
)
 
$
56,356

 
$
(3,084
)
 
$
500,827

 
$
(8,594
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2015
 
 
 
Less than 12 months
 
12 months or longer
 
Total
Description of securities
# of
holdings
 
Fair Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair Value
 
Unrealized
Losses
 
 
 
(Dollars in thousands)
U.S.government agency securities
3

 
$
1,990

 
$
(4
)
 
$
—

 
$
—

 
$
1,990

 
$
(4
)
Agency mortgage-backed securities
57

 
112,648

 
(1,062
)
 
4,297

 
(140
)
 
116,945

 
(1,202
)
Agency collateralized mortgage obligations
23

 
147,707

 
(1,420
)
 
80,927

 
(2,984
)
 
228,634

 
(4,404
)
Single issuer trust preferred securities issued by banks and insurers
2

 
1,018

 
(33
)
 
1,018

 
(48
)
 
2,036

 
(81
)
Pooled trust preferred securities issued by banks and insurers
1

 
—

 
—

 
1,572

 
(645
)
 
1,572

 
(645
)
Small business administration pooled securities
3

 
37,986

 
(174
)
 
—

 
—

 
37,986

 
(174
)
Equity securities
34

 
3,481

 
(189
)
 
4,971

 
(379
)
 
8,452

 
(568
)
Total temporarily impaired securities
123

 
$
304,830

 
$
(2,882
)
 
$
92,785

 
$
(4,196
)
 
$
397,615

 
$
(7,078
)
Schedule of Other Than Temporary Impairment
The following table shows the total OTTI that the Company recorded for the periods indicated:
 
Years Ended December 31
 
2016
 
2015
 
2014
 
(Dollars in thousands)
Gross change in OTTI recorded on certain investments
$
—

 
$
—

 
$
2,098

Portion of OTTI recognized in OCI
—

 
—

 
(2,098
)
Total credit related OTTI recognized in earnings
$
—

 
$
—

 
$
—
Summary of Cumulative Credit Related Component of OTTI
The following table shows the cumulative credit related component of OTTI for the periods indicated:
 
Years Ended December 31
 
2016
 
2015
 
2014
 
(Dollars in thousands)
Balance at beginning of period
$
—

 
$
(9,997
)
 
$
(9,997
)
Add
 
 
 
 
 
Incurred on securities not previously impaired
—

 
—

 
—

Incurred on securities previously impaired
—

 
—

 
—

Less
 
 
 
 
 
Securities sold during the period
—

 
9,997

 
—

Reclassification due to changes in Company’s intent
—

 
—

 
—

Increases in cash flow expected to be collected
—

 
—

 
—

Balance at end of period
$
—

 
$
—

 
$
(9,997
)