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MARKETABLE SECURITIES (Tables)
 6 Months Ended
Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]  
Schedule of Amortized Cost and Fair Value of Available for Sale and Held to Maturity Securities
The following tables summarize the amortized cost and fair value of securities available for sale and securities held to maturity as of June 30, 2018 and December 31, 2017 and the corresponding amounts of gross unrealized gains and losses:
June 30, 2018
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
Available for sale:
 
 
 
 
 
 
 
Corporate bonds
$
18,784

 
$
—

 
$
643

 
$
18,141

Municipal securities
18,211

 
48

 
305

 
17,954

Mortgage-backed securities
95,062

 
—

 
3,820

 
91,242

Collateralized mortgage obligations
119,371

 
—

 
3,218

 
116,153

Total available for sale
$
251,428

 
$
48

 
$
7,986

 
$
243,490

 
 
 
 
 
 
 
 
Held to maturity:
 
 
 
 
 
 
 
Municipal securities
$
143,295

 
$
1,041

 
$
1,481

 
$
142,855

Mortgage-backed securities
18,880

 
88

 
472

 
18,496

Collateralized mortgage obligations
5,064

 
61

 
35

 
5,090

Total held to maturity
$
167,239

 
$
1,190

 
$
1,988

 
$
166,441


December 31, 2017
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
Available for sale:
 
 
 
 
 
 
 
Corporate bonds
$
18,823

 
$
64

 
$
50

 
$
18,837

Municipal securities
7,746

 
—

 
200

 
7,546

Mortgage-backed securities
92,471

 
—

 
1,793

 
90,678

Collateralized mortgage obligations
116,809

 
5

 
1,503

 
115,311

Total available for sale
$
235,849

 
$
69

 
$
3,546

 
$
232,372

 
 
 
 
 
 
 
 
Held to maturity:
 
 
 
 
 
 
 
Municipal securities
$
146,496

 
$
2,244

 
$
218

 
$
148,522

Mortgage-backed securities
22,026

 
199

 
230

 
21,995

Collateralized mortgage obligations
6,162

 
111

 
—

 
6,273

Total held to maturity
$
174,684

 
$
2,554

 
$
448

 
$
176,790
Schedule of Securities with Gross Unrealized Losses
Information pertaining to securities with gross unrealized losses as of June 30, 2018 and December 31, 2017 aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position is detailed in the following tables:
 
Less Than 12 Months
 
12 Months or Longer
 
Total
June 30, 2018
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
Available for sale:
 
 
 
 
 
 
 
 
 
 
 
Corporate bonds
$
(643
)
 
$
18,141

 
$
—

 
$
—

 
$
(643
)
 
$
18,141

Municipal securities
(17
)
 
807

 
(288
)
 
7,410

 
(305
)
 
8,217

Mortgage-backed securities
(314
)
 
16,151

 
(3,506
)
 
75,091

 
(3,820
)
 
91,242

Collateralized mortgage obligations
(2,504
)
 
91,904

 
(714
)
 
23,847

 
(3,218
)
 
115,751

Total available for sale
$
(3,478
)
 
$
127,003

 
$
(4,508
)
 
$
106,348

 
$
(7,986
)
 
$
233,351

 
 
 
 
 
 
 
 
 
 
 
 
Held to maturity:
 
 
 
 
 
 
 
 
 
 
 
Municipal securities
$
(952
)
 
$
68,662

 
$
(529
)
 
$
19,466

 
$
(1,481
)
 
$
88,128

Mortgage-backed securities
(158
)
 
6,686

 
(314
)
 
8,538

 
(472
)
 
15,224

Collateralized mortgage obligations
(35
)
 
2,594

 
—

 
—

 
(35
)
 
2,594

Total held to maturity
$
(1,145
)
 
$
77,942

 
$
(843
)
 
$
28,004

 
$
(1,988
)
 
$
105,946

 
Less Than 12 Months
 
12 Months or Longer
 
Total
December 31, 2017
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
Available for sale:
 
 
 
 
 
 
 
 
 
 
 
Corporate bonds
$
(50
)
 
$
8,019

 
$
—

 
$
—

 
$
(50
)
 
$
8,019

Municipal securities
—

 
—

 
(200
)
 
7,546

 
(200
)
 
7,546

Mortgage-backed securities
(658
)
 
42,881

 
(1,135
)
 
47,797

 
(1,793
)
 
90,678

Collateralized mortgage obligations
(1,091
)
 
93,584

 
(412
)
 
21,258

 
(1,503
)
 
114,842

Total available for sale
$
(1,799
)
 
$
144,484

 
$
(1,747
)
 
$
76,601

 
$
(3,546
)
 
$
221,085

 
 
 
 
 
 
 
 
 
 
 
 
Held to maturity:
 
 
 
 
 
 
 
 
 
 
 
Municipal securities
$
(37
)
 
$
9,230

 
$
(181
)
 
$
19,961

 
$
(218
)
 
$
29,191

Mortgage-backed securities
(57
)
 
6,499

 
(173
)
 
9,747

 
(230
)
 
16,246

Collateralized mortgage obligations
—

 
—

 
—

 
—

 
—

 
—

Total held to maturity
$
(94
)
 
$
15,729

 
$
(354
)
 
$
29,708

 
$
(448
)
 
$
45,437
Schedule of Proceeds from Sales of Securities
The proceeds from sales of available for sale securities and the associated gains and losses are listed below for:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Proceeds from sales
$
9,457

 
$
14,762

 
$
9,457

 
$
14,762

Gross gains
—

 
38

 
—

 
38

Gross losses
(51
)
 
(13
)
 
(51
)
 
(13
)
Schedule of Sale of Held To Maturity Securities
Sale of securities held to maturity were as follows for:
 
Three Months Ended June 30,
Six Months Ended June 30,
 
2017
 
2017
Proceeds from sales
$
923

 
$
923

Amortized cost
907

 
907

Gross realized gains
16

 
16

Tax expense related to securities gains/losses
(4
)
 
(4
)
Investments Classified by Contractual Maturity Date
The contractual maturities at June 30, 2018 of available for sale and held to maturity securities at carrying value and estimated fair value are shown below. The Company invests in mortgage-backed securities and collateralized mortgage obligations that have expected maturities that differ from their contractual maturities. These differences arise because borrowers and/or issuers may have the right to call or prepay their obligation with or without call or prepayment penalties.
 
Available for Sale
 
Held to Maturity
June 30, 2018
Amortized
Cost
 
Estimated
Fair
Value
 
Amortized
Cost
 
Estimated
Fair
Value
Due within one year
$
—

 
$
—

 
$
1,175

 
$
1,175

Due after one year through five years
7,373

 
7,216

 
19,089

 
19,295

Due after five years through ten years
21,924

 
21,469

 
40,520

 
41,178

Due after ten years
7,698

 
7,410

 
82,511

 
81,207

Mortgage-backed securities
95,062

 
91,242

 
18,880

 
18,496

Collateralized mortgage obligations
119,371

 
116,153

 
5,064

 
5,090

Total Securities
$
251,428

 
$
243,490

 
$
167,239

 
$
166,441