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Investment Securities (Tables)
 9 Months Ended
Sep. 30, 2018
Investments [Abstract]  
Schedule of Available for Sale and Held for Maturity Securities Reconciliation [Table Text Block]
Investment securities available for sale (AFS):
 
 
 
September 30, 2018
 
 
 
Cost
Basis
 
 
Gross
Unrealized
Gains
 
 
Gross
Unrealized
Losses
 
 
Fair
Value
US Agency
 
 
$
6,731
 
 
 
$
—
 
 
 
$
(308
)
 
 
$
6,423
 
US Agency mortgage- backed securities
 
 
 
87,075
 
 
 
 
232
 
 
 
 
(2,308
)
 
 
 
84,999
 
Municipal
 
 
 
11,240
 
 
 
 
15
 
 
 
 
(489
)
 
 
 
10,766
 
Corporate bonds
 
 
 
37,380
 
 
 
 
92
 
 
 
 
(907
)
 
 
 
36,565
 
Total
 
 
$
142,426
 
 
 
$
339
 
 
 
$
(4,012
)
 
 
$
138,753
 
 
Investment securities held to maturity (HTM):
 
 
 
September 30, 2018
 
 
 
Cost
Basis
 
 
Gross
Unrealized
Gains
 
 
Gross
Unrealized
Losses
 
 
Fair
Value
US Agency mortgage- backed securities
 
 
$
8,294
 
 
 
$
65
 
 
 
$
(256
)
 
 
$
8,103
 
Municipal
 
 
 
24,341
 
 
 
 
25
 
 
 
 
(956
)
 
 
 
23,410
 
Corporate bonds and other securities
 
 
 
6,038
 
 
 
 
10
 
 
 
 
(216
)
 
 
 
5,832
 
Total
 
 
$
38,673
 
 
 
$
100
 
 
 
$
(1,428
)
 
 
$
37,345
 
Investment securities available for sale (AFS):
 
 
 
December 31, 2017
 
 
 
Cost
Basis
 
 
Gross
Unrealized
Gains
 
 
Gross
Unrealized
Losses
 
 
Fair
Value
US Agency
 
 
$
6,612
 
 
 
$
—
 
 
 
$
(40
)
 
 
$
6,572
 
US Agency mortgage- backed securities
 
 
 
79,854
 
 
 
 
611
 
 
 
 
(719
)
 
 
 
79,746
 
Municipal
 
 
 
7,198
 
 
 
 
27
 
 
 
 
(189
)
 
 
 
7,036
 
Corporate bonds
 
 
 
35,886
 
 
 
 
322
 
 
 
 
(424
)
 
 
 
35,784
 
Total
 
 
$
129,550
 
 
 
$
960
 
 
 
$
(1,372
)
 
 
$
129,138
 
Investment securities held to maturity (HTM):
 
 
 
December 31, 2017
 
 
 
Cost
Basis
 
 
Gross
Unrealized
Gains
 
 
Gross
Unrealized
Losses
 
 
Fair
Value
US Agency mortgage- backed securities
 
 
$
9,740
 
 
 
$
149
 
 
 
$
(45
)
 
 
$
9,844
 
Municipal
 
 
 
22,970
 
 
 
 
203
 
 
 
 
(238
)
 
 
 
22,935
 
Corporate bonds and other securities
 
 
 
6,042
 
 
 
 
38
 
 
 
 
(48
)
 
 
 
6,032
 
Total
 
 
$
38,752
 
 
 
$
390
 
 
 
$
(331
)
 
 
$
38,811
 
Schedule of Unrealized Loss on Investments [Table Text Block]
The following tables present information concerning investments with unrealized losses as of September 30, 2018 and December 31, 2017 (in thousands):
Total investment securities:
 
 
 
September 30, 2018
 
 
 
Less than 12 months
 
 
12 months or longer
 
 
Total
 
 
 
Fair
Value
 
 
Unrealized
Losses
 
 
Fair
Value
 
 
Unrealized
Losses
 
 
Fair
Value
 
 
Unrealized
Losses
US Agency
 
 
$
2,734
 
 
 
$
(109
)
 
 
$
3,689
 
 
 
$
(199
)
 
 
$
6,423
 
 
 
$
(308
)
US Agency mortgage-backed securities
 
 
 
49,544
 
 
 
 
(1,211
)
 
 
 
29,471
 
 
 
 
(1,353
)
 
 
 
79,015
 
 
 
 
(2,564
)
Municipal
 
 
 
19,978
 
 
 
 
(619
)
 
 
 
11,847
 
 
 
 
(826
)
 
 
 
31,825
 
 
 
 
(1,445
)
Corporate bonds and other securities
 
 
 
21,320
 
 
 
 
(547
)
 
 
 
12,979
 
 
 
 
(576
)
 
 
 
34,299
 
 
 
 
(1,123
)
Total
 
 
$
93,576
 
 
 
$
(2,486
)
 
 
$
57,986
 
 
 
$
(2,954
)
 
 
$
151,562
 
 
 
$
(5,440
)
Total investment securities:
 
 
 
 
December 31, 2017
 
 
 
Less than 12 months
 
 
12 months or longer
 
 
Total
 
 
 
Fair
Value
 
 
Unrealized
Losses
 
 
Fair
Value
 
 
Unrealized
Losses
 
 
Fair
Value
 
 
Unrealized
Losses
US Agency
 
 
$
5,923
 
 
 
$
(39
)
 
 
$
399
 
 
 
$
(1
)
 
 
$
6,322
 
 
 
$
(40
)
US Agency mortgage-backed securities
 
 
 
36,783
 
 
 
 
(253
)
 
 
 
22,625
 
 
 
 
(511
)
 
 
 
59,408
 
 
 
 
(764
)
Municipal
 
 
 
8,657
 
 
 
 
(109
)
 
 
 
7,727
 
 
 
 
(318
)
 
 
 
16,384
 
 
 
 
(427
)
Corporate bonds and other securities
 
 
 
7,123
 
 
 
 
(71
)
 
 
 
13,655
 
 
 
 
(401
)
 
 
 
20,778
 
 
 
 
(472
)
Total
 
 
$
58,486
 
 
 
$
(472
)
 
 
$
44,406
 
 
 
$
(1,231
)
 
 
$
102,892
 
 
 
$
(1,703
)
Schedule of Contractual Maturities of Securities [Table Text Block]
Total investment securities:
 
 
 
September 30, 2018
 
 
 
Available for sale
 
 
Held to maturity
 
 
 
Cost
Basis
 
 
Fair
Value
 
 
Cost
Basis
 
 
Fair
Value
Within 1 year
 
 
$
48
 
 
 
$
49
 
 
 
$
1,000
 
 
 
$
973
 
After 1 year but within 5 years
 
 
 
20,140
 
 
 
 
19,890
 
 
 
 
3,658
 
 
 
 
3,471
 
After 5 years but within 10 years
 
 
 
47,068
 
 
 
 
45,673
 
 
 
 
18,017
 
 
 
 
17,362
 
After 10 years but within15 years
 
 
 
29,952
 
 
 
 
29,194
 
 
 
 
11,605
 
 
 
 
11,292
 
Over 15 years
 
 
 
45,218
 
 
 
 
43,947
 
 
 
 
4,393
 
 
 
 
4,247
 
Total
 
 
$
142,426
 
 
 
$
138,753
 
 
 
$
38,673
 
 
 
$
37,345