| Change in Accumulated Other Comprehensive Income | 
 The change in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2021 is summarized as follows, net of tax (dollars in thousands): 
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  | 
      | 
  | 
  | 
      | 
Unrealized Gains  | 
      | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
  | 
 
  | 
  | 
  | 
  | 
  | 
(Losses)  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
  | 
  | 
Unrealized  | 
  | 
for AFS  | 
  | 
  | 
  | 
  | 
Unrealized  | 
  | 
  | 
  | 
 
  | 
  | 
Gains (Losses)  | 
  | 
Securities  | 
  | 
Change in Fair  | 
  | 
Gains  | 
  | 
  | 
  | 
 
  | 
  | 
on AFS  | 
  | 
Transferred to  | 
  | 
Value of Cash  | 
  | 
(Losses) on  | 
  | 
  | 
  | 
 
  | 
  | 
Securities  | 
  | 
HTM  | 
  | 
Flow Hedge  | 
  | 
BOLI  | 
  | 
Total  | 
 
Balance - June 30, 2021  | 
  | 
$  | 
 54,792  | 
  | 
$  | 
 45  | 
  | 
$  | 
 1,132  | 
  | 
$  | 
 (2,897)  | 
  | 
$  | 
 53,072  | 
 
Other comprehensive income (loss):  | 
  | 
   | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
   | 
    | 
 
Other comprehensive income (loss) before reclassification  | 
  | 
   | 
 (23,242)  | 
  | 
  | 
 —  | 
  | 
  | 
 (545)  | 
  | 
  | 
 —  | 
  | 
   | 
 (23,787)  | 
 
Amounts reclassified from AOCI into earnings  | 
  | 
   | 
 (7)  | 
  | 
  | 
 (5)  | 
  | 
  | 
 —  | 
  | 
  | 
 150  | 
  | 
   | 
 138  | 
 
Net current period other comprehensive income (loss)  | 
  | 
   | 
 (23,249)  | 
  | 
   | 
 (5)  | 
  | 
   | 
 (545)  | 
  | 
   | 
 150  | 
  | 
   | 
 (23,649)  | 
 
Balance - September 30, 2021  | 
  | 
$  | 
 31,543  | 
  | 
$  | 
 40  | 
  | 
$  | 
 587  | 
  | 
$  | 
 (2,747)  | 
  | 
$  | 
 29,423  | 
 
 
 
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  | 
      | 
  | 
  | 
      | 
Unrealized Gains  | 
      | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
  | 
 
  | 
  | 
  | 
  | 
  | 
(Losses)  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
  | 
  | 
Unrealized  | 
  | 
for AFS  | 
  | 
  | 
  | 
  | 
Unrealized  | 
  | 
  | 
  | 
 
  | 
  | 
Gains (Losses)  | 
  | 
Securities  | 
  | 
Change in Fair  | 
  | 
Gains  | 
  | 
  | 
  | 
 
  | 
  | 
on AFS  | 
  | 
Transferred to  | 
  | 
Value of Cash  | 
  | 
(Losses) on  | 
  | 
  | 
  | 
 
  | 
  | 
Securities  | 
  | 
HTM  | 
  | 
Flow Hedge  | 
  | 
BOLI  | 
  | 
Total  | 
 
Balance - December 31, 2020  | 
  | 
$  | 
 74,161  | 
  | 
$  | 
 55  | 
  | 
$  | 
 —  | 
  | 
$  | 
 (3,201)  | 
  | 
$  | 
 71,015  | 
 
Other comprehensive income (loss):  | 
  | 
   | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
   | 
    | 
 
Other comprehensive income (loss) before reclassification  | 
  | 
   | 
 (42,549)  | 
  | 
  | 
 —  | 
  | 
  | 
 634  | 
  | 
  | 
 —  | 
  | 
   | 
 (41,915)  | 
 
Amounts reclassified from AOCI into earnings  | 
  | 
   | 
 (69)  | 
  | 
  | 
 (15)  | 
  | 
  | 
 (47)  | 
  | 
  | 
 454  | 
  | 
   | 
 323  | 
 
Net current period other comprehensive income (loss)  | 
  | 
   | 
 (42,618)  | 
  | 
   | 
 (15)  | 
  | 
   | 
 587  | 
  | 
   | 
 454  | 
  | 
   | 
 (41,592)  | 
 
Balance - September 30, 2021  | 
  | 
$  | 
 31,543  | 
  | 
$  | 
 40  | 
  | 
$  | 
 587  | 
  | 
$  | 
 (2,747)  | 
  | 
$  | 
 29,423  | 
 
 
The change in accumulated other comprehensive income (loss) for the three months and nine months ended September 30, 2020 is summarized as follows, net of tax (dollars in thousands): 
 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
  | 
      | 
  | 
  | 
      | 
Unrealized Gain  | 
      | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
  | 
 
  | 
  | 
  | 
  | 
  | 
(Losses)  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
  | 
  | 
Unrealized  | 
  | 
for AFS  | 
  | 
  | 
  | 
  | 
Unrealized  | 
  | 
  | 
  | 
 
  | 
  | 
Gains (Losses)  | 
  | 
Securities  | 
  | 
Change in Fair  | 
  | 
Gains  | 
  | 
  | 
  | 
 
  | 
  | 
on AFS  | 
  | 
Transferred to  | 
  | 
Value of Cash  | 
  | 
(Losses)  | 
  | 
  | 
  | 
 
  | 
  | 
Securities  | 
  | 
HTM  | 
  | 
Flow Hedge  | 
  | 
on BOLI  | 
  | 
Total  | 
 
Balance - June 30, 2020  | 
  | 
$  | 
 63,886  | 
  | 
$  | 
 65  | 
  | 
$  | 
 —  | 
  | 
$  | 
 (2,647)  | 
  | 
$  | 
 61,304  | 
 
Other comprehensive income (loss):  | 
  | 
   | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
Other comprehensive income (loss) before reclassification   | 
  | 
   | 
 1,250  | 
  | 
  | 
 —  | 
  | 
  | 
 —  | 
  | 
  | 
 —  | 
  | 
  | 
 1,250  | 
 
Amounts reclassified from AOCI into earnings  | 
  | 
   | 
 (14)  | 
  | 
  | 
 (5)  | 
  | 
  | 
 —  | 
  | 
  | 
 127  | 
  | 
  | 
 108  | 
 
Net current period other comprehensive income (loss)  | 
  | 
   | 
 1,236  | 
  | 
   | 
 (5)  | 
  | 
   | 
 —  | 
  | 
   | 
 127  | 
  | 
   | 
 1,358  | 
 
Balance - September 30, 2020  | 
  | 
$  | 
 65,122  | 
  | 
$  | 
 60  | 
  | 
$  | 
 —  | 
  | 
$  | 
 (2,520)  | 
  | 
$  | 
 62,662  | 
 
 
 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
  | 
      | 
  | 
  | 
      | 
Unrealized Gain  | 
      | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
  | 
 
  | 
  | 
  | 
  | 
  | 
(Losses)  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
  | 
  | 
Unrealized  | 
  | 
for AFS  | 
  | 
  | 
  | 
  | 
Unrealized  | 
  | 
  | 
  | 
 
  | 
  | 
Gains (Losses)  | 
  | 
Securities  | 
  | 
Change in Fair  | 
  | 
Gains  | 
  | 
  | 
  | 
 
  | 
  | 
on AFS  | 
  | 
Transferred to  | 
  | 
Value of Cash  | 
  | 
(Losses)  | 
  | 
  | 
  | 
 
  | 
  | 
Securities  | 
  | 
HTM  | 
  | 
Flow Hedge  | 
  | 
on BOLI  | 
  | 
Total  | 
 
Balance - December 31, 2019  | 
  | 
$  | 
 37,877  | 
  | 
$  | 
 75  | 
  | 
$  | 
 (782)  | 
  | 
$  | 
 (1,595)  | 
  | 
$  | 
 35,575  | 
 
Other comprehensive income (loss):  | 
  | 
   | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
Other comprehensive income (loss) before reclassification  | 
  | 
   | 
 36,956  | 
  | 
  | 
 —  | 
  | 
  | 
 (699)  | 
  | 
  | 
 (1,289)  | 
  | 
  | 
 34,968  | 
 
Amounts reclassified from AOCI into earnings  | 
  | 
   | 
 (9,711)  | 
  | 
  | 
 (15)  | 
  | 
  | 
 1,481  | 
  | 
  | 
 364  | 
  | 
  | 
 (7,881)  | 
 
Net current period other comprehensive income (loss)  | 
  | 
   | 
 27,245  | 
  | 
   | 
 (15)  | 
  | 
   | 
 782  | 
  | 
   | 
 (925)  | 
  | 
   | 
 27,087  | 
 
Balance - September 30, 2020  | 
  | 
$  | 
 65,122  | 
  | 
$  | 
 60  | 
  | 
$  | 
 —  | 
  | 
$  | 
 (2,520)  | 
  | 
$  | 
 62,662  | 
 
 
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