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Investment Securities (Tables)
 12 Months Ended
Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]  
Summary Information Regarding Company's Investment Securities Classified as Available for Sale and Held to Maturity
Summary information regarding the Company’s investment securities classified as available for sale and held to maturity as of December 31, 2019 and 2018 follows.

(dollars in thousands)
Amortized
Cost
Gross
Unrealized
Gains
Gross Unrealized Losses
Fair Value
Less Than
1 Year
Over 1
Year
December 31, 2019
Securities available for sale:
U.S. agency mortgage-backed
$94,446  $1,081  $292  $63  $95,172  
Collateralized mortgage obligations
142,408  701  300  358  142,451  
Municipal bonds
15,895  166  56  —  16,005  
U.S. government agency
3,696  11  4  10  3,693  
Total available for sale
$256,445  $1,959  $652  $431  $257,321  
Securities held to maturity:
Municipal bonds
$7,149  $45  $—  $—  $7,194  
Total held to maturity
$7,149  $45  $—  $—  $7,194  

(dollars in thousands)
Amortized
Cost
Gross
Unrealized
Gains
Gross Unrealized Losses
Fair Value
December 31, 2018
Less Than
1 Year
Over 1
Year
Securities available for sale:
U.S. agency mortgage-backed
$86,487  $485  $171  $892  $85,909  
Collateralized mortgage obligations
145,814  129  161  2,191  143,591  
Municipal bonds
21,453  52  16  12  21,477  
U.S. government agency
9,169  29  19  25  9,154  
Total available for sale
$262,923  $695  $367  $3,120  $260,131  
Securities held to maturity:
Municipal bonds
$10,872  $11  $5  $37  $10,841  
Total held to maturity
$10,872  $11  $5  $37  $10,841  
Company's Investment Securities With Unrealized Losses, Aggregated by Type and Length
The Company's investment securities with unrealized losses, aggregated by type and length of time that individual securities have been in a continuous loss position, are summarized in the following tables.


(dollars in thousands)
Less Than 1 YearOver 1 YearTotal
December 31, 2019Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Securities available for sale:
U.S. agency mortgage-backed$28,847  $292  $5,148  $63  $33,995  $355  
Collateralized mortgage obligations50,004  300  37,131  358  87,135  658  
Municipal bonds3,044  56  —  —  3,044  56  
U.S. government agency1,213  4  466  10  1,679  14  
Total available for sale$83,108  $652  $42,745  $431  $125,853  $1,083  
Held to maturity:
Municipal bonds$—  $—  $—  $—  $—  $—  
Total held to maturity$—  $—  $—  $—  $—  $—  

(dollars in thousands)
Less Than 1 YearOver 1 YearTotal
December 31, 2018Fair ValueUnrealized LossesFair ValueUnrealized LossesFair ValueUnrealized Losses
Securities available for sale:
U.S. agency mortgage-backed$23,086  $171  $36,690  $892  $59,776  $1,063  
Collateralized mortgage obligations24,941  161  81,442  2,191  106,383  2,352  
Municipal bonds5,018  16  2,833  12  7,851  28  
U.S. government agency849  19  3,974  25  4,823  44  
Total available for sale$53,894  $367  $124,939  $3,120  $178,833  $3,487  
Held to maturity:
Municipal bonds$4,018  $5  $2,839  $37  $6,857  $42  
Total held to maturity$4,018  $5  $2,839  $37  $6,857  $42  
Amortized Cost and Estimated Fair Value by Maturity of Company's Investment Securities The amortized cost and estimated fair value by maturity of the Company’s investment securities as of December 31, 2019 are shown in the following tables. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. The expected maturity of a security may differ from its contractual maturity because of the exercise of call options and potential paydowns. Accordingly, actual maturities may differ from contractual maturities.
(dollars in thousands)
One Year
or Less
After One
Year through
Five Years
After Five
Years
through Ten
Years
After Ten
Years
Total
Fair Value
Securities available for sale:
U.S. agency mortgage-backed
$66  $16,306  $50,888  $27,912  $95,172  
Collateralized mortgage obligations
1,689  5,356  34,269  101,137  142,451  
Municipal bonds
1,208  7,209  6,180  1,408  16,005  
U.S. government agency
—  —  3,227  466  3,693  
Total securities available for sale
$2,963  $28,871  $94,564  $130,923  $257,321  
Securities held to maturity:
Municipal bonds
$—  $2,970  $4,224  $—  $7,194  
Total securities held to maturity
$—  $2,970  $4,224  $—  $7,194  

(dollars in thousands)
One Year
or Less
After One
Year through
Five Years
After Five
Years
through Ten
Years
After Ten
Years
Total
Amortized Cost
Securities available for sale:
U.S. agency mortgage-backed
$64  $16,222  $50,789  $27,371  $94,446  
Collateralized mortgage obligations
1,688  5,356  33,894  101,470  142,408  
Municipal bonds
1,207  7,173  6,162  1,353  15,895  
U.S. government agency
—  —  3,220  476  3,696  
Total securities available for sale
$2,959  $28,751  $94,065  $130,670  $256,445  
Securities held to maturity:
Municipal bonds
$—  $2,961  $4,188  $—  $7,149  
Total securities held to maturity
$—  $2,961  $4,188  $—  $7,149