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MARKETABLE SECURITIES (Tables)
 12 Months Ended
Dec. 31, 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 table summarizes the amortized cost and fair value of securities available for sale and securities held to maturity at December 31, 2018 and 2017 and the corresponding amounts of gross unrealized gains and losses:
 
December 31, 2018
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
Available for sale:
 
Corporate bonds
$
19,743

 
$
—

 
$
789

 
$
18,954

Municipal securities
15,778

 
75

 
260

 
15,593

Mortgage-backed securities
93,083

 
52

 
3,676

 
89,459

Collateralized mortgage obligations
111,341

 
—

 
2,372

 
108,969

Total available for sale
$
239,945

 
$
127

 
$
7,097

 
$
232,975

 
 
 
 
 
 
 
 
Held to maturity:
 
Municipal securities
$
141,942

 
$
1,156

 
$
1,094

 
$
142,004

Mortgage-backed securities
17,163

 
54

 
500

 
16,717

Collateralized mortgage obligations
4,059

 
48

 
28

 
4,079

Total held to maturity
$
163,164

 
$
1,258

 
$
1,622

 
$
162,800

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
The following table summarizes securities with unrealized losses at December 31, 2018 and 2017, aggregated by major security type and length of time in a continuous unrealized loss position:
 
Less Than 12 Months
 
12 Months or Longer
 
Total
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
December 31, 2018
 
 
 
 
 
 
 
 
 
 
 
Available for sale:
 
 
 
 
 
 
 
 
 
 
 
Corporate bonds
$
(453
)
 
$
11,236

 
$
(336
)
 
$
7,718

 
$
(789
)
 
$
18,954

Municipal securities
(17
)
 
2,219

 
(243
)
 
7,407

 
(260
)
 
9,626

Mortgage-backed securities
(89
)
 
7,173

 
(3,587
)
 
76,717

 
(3,676
)
 
83,890

Collateralized mortgage obligations
(79
)
 
9,232

 
(2,293
)
 
99,390

 
(2,372
)
 
108,622

Total available for sale
$
(638
)
 
$
29,860

 
$
(6,459
)
 
$
191,232

 
$
(7,097
)
 
$
221,092

 
 
 
 
 
 
 
 
 
 
 
 
Held to maturity:
 
 
 
 
 
 
 
 
 
 
 
Municipal securities
$
(512
)
 
$
55,793

 
$
(582
)
 
$
26,511

 
$
(1,094
)
 
$
82,304

Mortgage-backed securities
(21
)
 
1,478

 
(479
)
 
12,317

 
(500
)
 
13,795

Collateralized mortgage obligations
(28
)
 
2,171

 
—

 
—

 
(28
)
 
2,171

Total held to maturity
$
(561
)
 
$
59,442

 
$
(1,061
)
 
$
38,828

 
$
(1,622
)
 
$
98,270

 
 
Less Than 12 Months
 
12 Months or Longer
 
Total
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
 
Gross
Unrealized
Losses
 
Estimated
Fair
Value
December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
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 securities and the associated gains and losses are listed below:
 
2018
 
2017
 
2016
Proceeds
$
411,796

 
$
217,111

 
$
105,808

Gross gains
4

 
180

 
243

Gross losses
(54
)
 
(13
)
 
(161
)
Schedule of Sale of Held To Maturity Securities
Sales of securities held to maturity were as follows for the years ended December 31:
 
2017
 
2016
Proceeds from sales
$
3,298

 
$
1,866

Amortized cost
3,140

 
1,842

Gross realized gains
158

 
24

Tax expense related to securities gains/losses
(44
)
 
(7
)
Investments Classified by Contractual Maturity Date
The contractual maturities at December 31, 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
 
Amortized
Cost
 
Estimated
Fair
Value
 
Amortized
Cost
 
Estimated
Fair
Value
December 31, 2018
 
 
 
 
 
 
 
Due within one year
$
—

 
$
—

 
$
764

 
$
764

Due after one year through five years
11,216

 
10,852

 
19,062

 
19,286

Due after five years through ten years
16,654

 
16,287

 
43,059

 
43,795

Due after ten years
7,651

 
7,408

 
79,057

 
78,159

Mortgage-backed securities
93,083

 
89,459

 
17,163

 
16,717

Collateralized mortgage obligations
111,341

 
108,969

 
4,059

 
4,079

 
$
239,945

 
$
232,975

 
$
163,164

 
$
162,800