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Investment Securities (Tables)
 6 Months Ended
Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment Securities The amortized cost and estimated fair value of securities available-for-sale and held-to-maturity along with gross unrealized gains and losses are summarized as follows:
(dollars in thousands)
June 30, 2022Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
Securities Available for Sale:
U.S. treasury securities$95,897 $— $(6,063)$89,834 
U.S. agency6,672 — (381)6,291 
Asset backed securities27,983 — (845)27,138 
State, county & municipal securities199,336 223 (26,864)172,695 
Corporate debt securities50,073 45 (2,471)47,647 
Mortgage-backed securities341,805 4 (27,868)313,941 
Total$721,766 $272 $(64,492)$657,546 
June 30, 2022Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
Securities Held to Maturity:
U.S. treasury securities$21,577 $— $(1,395)$20,182 
U.S. agency15,476 — (1,188)14,288 
State, county & municipal securities88,712 — (13,084)75,628 
Mortgage-backed securities178,249 — (18,396)159,853 
Total$304,014 $— $(34,063)$269,951 
December 31, 2021
Securities Available for Sale:
U.S. treasury securities$88,638 $— $(1,087)$87,551 
U.S. agency17,916 5 (140)17,781 
State, county & municipal securities252,632 877 (3,356)250,153 
Corporate debt securities48,153 520 (265)48,408 
Mortgage-backed securities539,172 2,160 (7,061)534,271 
Total$946,511 $3,562 $(11,909)$938,164 
Schedule of Amortized Cost and Fair Value of Investment Securities by Contractual Maturity
Available for SaleHeld to Maturity
(dollars in thousands)Amortized CostFair ValueAmortized CostFair Value
Due in one year or less$— $— $— $— 
Due after one year through five years80,050 76,251 6,701 6,432 
Due after five years through ten years119,910 108,410 45,685 41,464 
Due after ten years180,001 158,944 73,379 62,202 
$379,961 $343,605 $125,765 $110,098 
Mortgage-backed securities341,805 313,941 178,249 159,853 
$721,766 $657,546 $304,014 $269,951 
Schedule of Continuous Unrealized Loss Position Information pertaining to available-for-sale securities with gross unrealized losses at June 30, 2022 and December 31, 2021 aggregated by investment category and length of time that individual securities have been in a continuous loss position is as follows:
Less Than 12 Months12 Months or GreaterTotal
(dollars in thousands)Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
June 30, 2022
U.S. treasury securities$89,838 $(6,063)$— $— $89,838 $(6,063)
U.S. agency6,132 (381)— — 6,132 (381)
Asset backed securities23,162 (594)3,976 (251)27,138 (845)
State, county & municipal securities143,652 (23,724)14,227 (3,140)157,879 (26,864)
Corporate debt securities43,294 (2,471)— — 43,294 (2,471)
Mortgage-backed securities261,103 (21,109)40,971 (6,759)302,074 (27,868)
$567,181 $(54,342)$59,174 $(10,150)$626,355 $(64,492)
December 31, 2021
U.S. treasury securities$87,302 $(1,087)$— $— $87,302 $(1,087)
U.S. agency10,969 (140)— — 10,969 (140)
State, county & municipal securities180,551 (3,131)5,970 (225)186,521 (3,356)
Corporate debt securities31,977 (265)— — 31,977 (265)
Mortgage-backed securities377,413 (6,421)21,129 (640)398,542 (7,061)
$688,212 $(11,044)$27,099 $(865)$715,311 $(11,909)
Information pertaining to held-to-maturity securities with gross unrealized losses at June 30, 2022 aggregated by investment category and length of time that individual securities have been in a continuous loss position is as follows:
Less Than 12 Months12 Months or GreaterTotal
(dollars in thousands)Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
June 30, 2022
U.S. Treasury$20,182 $(1,395)$—$— $20,182 $(1,395)
U.S. agency14,287 (1,188)— — 14,287 (1,188)
State, county & municipal securities74,929 (12,783)699 (301)75,628 (13,084)
Mortgage-backed securities136,075 (15,534)23,779 (2,862)159,854 (18,396)
$245,473 $(30,900)$24,478 $(3,163)$269,951 $(34,063)