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SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Schedule of Equity securities gains and losses [Table Text Block]
The following table represents a summary of the gains and losses recognized within non-interest income and non-interest expense within the consolidated statements of income that relate to equity securities for the periods indicated:
Years Ended December 31
202020192018
(Dollars in thousands)
Net gains (losses) recognized during the period on equity securities$528 $1,566 (1,225)
Less: net gains recognized during the period on equity securities sold during the period14 18 874 
Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date$514 $1,548 (2,099)
Schedule of Available-for-sale Securities Reconciliation
The following table summarizes the amortized cost, allowance for credit losses, and fair value of available for sale securities and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) at the dates indicated:

 December 31, 2020December 31, 2019
 Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Allowance for credit lossesFair
Value		Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Fair
Value
 (Dollars in thousands)
U.S. government agency securities$22,476 $1,640 $— $— $24,116 $32,473 $642 $— $33,115 
Agency mortgage-backed securities224,293 9,337 (1)— 233,629 243,548 3,456 (4)247,000 
Agency collateralized mortgage obligations88,687 3,083 (87)— 91,683 87,305 1,225 (19)88,511 
State, county, and municipal securities790 17 — — 807 1,377 19 — 1,396 
Single issuer trust preferred securities issued by banks489 — (1)— 488 488 5 — 493 
Pooled trust preferred securities issued by banks and insurers 1,429 — (373)— 1,056 1,488 — (374)1,114 
Small business administration pooled securities57,289 3,792 — — 61,081 54,024 771 — 54,795 
Total available for sale securities$395,453 $17,869 $(462)$— $412,860 $420,703 $6,118 $(397)$426,424 
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
The following table shows the gross unrealized losses and fair value of the Company’s available for sale securities which are in an unrealized loss position, and for which the Company has not recorded a provision for credit losses for the year ended December 31, 2020. These available for sale securities are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position:
  December 31, 2020
  Less than 12 months12 months or longerTotal
# of
holdings		Fair ValueUnrealized
Losses		Fair
Value		Unrealized
Losses		Fair ValueUnrealized
Losses
  (Dollars in thousands)
Agency mortgage-backed securities3 $437 $(1)$— $— $437 $(1)
Agency collateralized mortgage obligations2 23,323 (87)— — 23,323 (87)
Single issuer trust preferred securities issued by banks and insurers1 488 (1)— — 488 (1)
Pooled trust preferred securities issued by banks and insurers1 — — 1,056 (373)1,056 (373)
Total impaired available for sale securities7 $24,248 $(89)$1,056 $(373)$25,304 $(462)
Debt Securities, Held-to-maturity
The following table summarizes the amortized cost, fair value and allowance for credit losses of held to maturity securities and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) at the dates indicated:
 December 31, 2020December 31, 2019
 Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Allowance for credit lossesFair
Value		Amortized
Cost		Gross
Unrealized
Gains		Gross Unrealized
Losses		Fair
Value
 (Dollars in thousands)
U.S. government agency securities$— $— $— $— $— $12,874 $123 $— $12,997 
U.S. treasury securities4,017 60 — — 4,077 4,032 21 — 4,053 
Agency mortgage-backed securities356,085 18,036 — — 374,121 397,414 8,445 (57)405,802 
Agency collateralized mortgage obligations335,993 8,466 (340)— 344,119 293,662 4,501 (849)297,314 
Single issuer trust preferred securities issued by banks1,500 — (2)— 1,498 1,500 — (10)1,490 
Small business administration pooled securities26,917 1,445 — — 28,362 31,324 338 (55)31,607 
Total held to maturity securities$724,512 $28,007 $(342)$— $752,177 $740,806 $13,428 $(971)$753,263 
Schedule of Contractual Maturities of Securities A schedule of the contractual maturities of securities available for sale and securities held to maturity at December 31, 2020 is presented below:
Due in one year or lessDue after one year to five yearsDue after five to ten yearsDue after ten yearsTotal
Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
(Dollars in thousands)
Available for sale securities
U.S. government agency securities$— $— $10,001 $10,231 $12,475 $13,885 $— $— $22,476 $24,116 
Agency mortgage-backed securities— — 74,048 76,441 29,265 31,458 120,980 125,730 224,293 233,629 
Agency collateralized mortgage obligations— — — — — — 88,687 91,683 88,687 91,683 
State, county, and municipal securities600 601 — — 190 206 — — 790 807 
Single issuer trust preferred securities issued by banks— — — — — — 489 488 489 488 
Pooled trust preferred securities issued by banks and insurers — — — — — — 1,429 1,056 1,429 1,056 
Small business administration pooled securities— — — — — — 57,289 61,081 57,289 61,081 
Total available for sale securities$600 $601 $84,049 $86,672 $41,930 $45,549 $268,874 $280,038 $395,453 $412,860 
Held to maturity securities
U.S. Treasury securities1,999 2,023 2,018 2,054 — — — — 4,017 4,077 
Agency mortgage-backed securities— — 2,472 2,588 75,240 78,169 278,373 293,364 356,085 374,121 
Agency collateralized mortgage obligations— — — — — — 335,993 344,119 335,993 344,119 
Single issuer trust preferred securities issued by banks— — — — 1,500 1,498 — — 1,500 1,498 
Small business administration pooled securities— — — — — — 26,917 28,362 26,917 28,362 
Total held to maturity securities1,999 2,023 4,490 4,642 76,740 79,667 641,283 665,845 724,512 752,177 
Total$2,599 $2,624 $88,539 $91,314 $118,670 $125,216 $910,157 $945,883 $1,119,965 $1,165,037 
Schedule of Gross Unrealized Losses and Fair Value of Investments
  December 31, 2019
  Less than 12 months12 months or longerTotal
# of
holdings		Fair ValueUnrealized
Losses		Fair
Value		Unrealized
Losses		Fair ValueUnrealized
Losses
  (Dollars in thousands)
Agency mortgage-backed securities12 $34,009 $(59)$243 $(2)$34,252 $(61)
Agency collateralized mortgage obligations17 48,476 (215)37,382 (653)85,858 (868)
Single issuer trust preferred securities issued by banks and insurers1 — — 1,490 (10)1,490 (10)
Pooled trust preferred securities issued by banks and insurers1 — — 1,114 (374)1,114 (374)
Small business administration pooled securities1 7,349 (55)— — 7,349 (55)
Total temporarily impaired securities32 $89,834 $(329)$40,229 $(1,039)$130,063 $(1,368)