XML 31 R21.htm IDEA: XBRL DOCUMENT
v3.21.1

Securities (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Investments Debt And Equity Securities [Abstract] |
Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment | The following table summarizes the amortized cost and estimated fair values of debt securities held for investment:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
March 31, 2021 |  | (Dollars in thousands) |
Mortgage backed securities (1) |  | $ | 51 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 54 |
States and political subdivisions |  |  | 2,405 |  |  |  | 3 |  |  |  | (9 | ) |  |  | 2,399 |
Other securities |  |  | 500 |  |  |  | — |  |  |  | — |  |  |  | 500 |
Total |  | $ | 2,956 |  |  | $ | 6 |  |  | $ | (9 | ) |  | $ | 2,953 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage backed securities (1) |  | $ | 59 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 62 |
States and political subdivisions |  |  | 2,405 |  |  |  | 18 |  |  |  | (1 | ) |  |  | 2,422 |
Other securities |  |  | 500 |  |  |  | — |  |  |  | — |  |  |  | 500 |
Total |  | $ | 2,964 |  |  | $ | 21 |  |  | $ | (1 | ) |  | $ | 2,984 |
Summary of Amortized Cost and Estimated Fair Values of Debt Securities Available for Sale | The following table summarizes the amortized cost and estimated fair values of debt securities available for sale:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
March 31, 2021 |  | (Dollars in thousands) |
U.S. treasuries |  | $ | 445,813 |  |  | $ | 8,155 |  |  | $ | (182 | ) |  | $ | 453,786 |
U.S. federal agencies |  |  | 19,166 |  |  |  | 1 |  |  |  | (58 | ) |  |  | 19,109 |
Mortgage backed securities (1) |  |  | 14,877 |  |  |  | 372 |  |  |  | — |  |  |  | 15,249 |
States and political subdivisions |  |  | 15,789 |  |  |  | 269 |  |  |  | (18 | ) |  |  | 16,040 |
Asset backed securities |  |  | 13,341 |  |  |  | 62 |  |  |  | — |  |  |  | 13,403 |
Total |  | $ | 508,986 |  |  | $ | 8,859 |  |  | $ | (258 | ) |  | $ | 517,587 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 465,416 |  |  | $ | 9,820 |  |  | $ | — |  |  | $ | 475,236 |
U.S. federal agencies |  |  | 19,697 |  |  |  | 1 |  |  |  | (60 | ) |  |  | 19,638 |
Mortgage backed securities (1) |  |  | 15,268 |  |  |  | 428 |  |  |  | — |  |  |  | 15,696 |
States and political subdivisions |  |  | 28,571 |  |  |  | 377 |  |  |  | — |  |  |  | 28,948 |
Asset backed securities |  |  | 13,337 |  |  |  | — |  |  |  | (623 | ) |  |  | 12,714 |
Total |  | $ | 542,289 |  |  | $ | 10,626 |  |  | $ | (683 | ) |  | $ | 552,232 |
| (1) | Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.
Maturity of Debt Securities | The maturities of debt securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity.
|  | March 31, 2021 |  |  | December 31, 2020 |
|  | Amortized Cost |  |  | Estimated Fair Value |  |  | Amortized Cost |  |  | Estimated Fair Value |
|  | (Dollars in thousands) |
Held for Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual maturity of debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within one year |  | $ | 862 |  |  | $ | 862 |  |  | $ | 807 |  |  | $ | 809 |
After one year but within five years |  |  | 2,089 |  |  |  | 2,085 |  |  |  | 2,091 |  |  |  | 2,110 |
After five years but within ten years |  |  | 4 |  |  |  | 5 |  |  |  | 65 |  |  |  | 64 |
After ten years |  |  | 1 |  |  |  | 1 |  |  |  | 1 |  |  |  | 1 |
Total |  | $ | 2,956 |  |  | $ | 2,953 |  |  | $ | 2,964 |  |  | $ | 2,984 |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual maturity of debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within one year |  | $ | 110,317 |  |  | $ | 111,484 |  |  | $ | 339,752 |  |  | $ | 341,102 |
After one year but within five years |  |  | 359,388 |  |  |  | 366,433 |  |  |  | 162,401 |  |  |  | 171,135 |
After five years but within ten years |  |  | 5,914 |  |  |  | 6,049 |  |  |  | 3,753 |  |  |  | 3,910 |
After ten years |  |  | 33,367 |  |  |  | 33,621 |  |  |  | 36,383 |  |  |  | 36,085 |
Total debt securities |  | $ | 508,986 |  |  | $ | 517,587 |  |  | $ | 542,289 |  |  | $ | 552,232 |
Company's Book Value of Pledged Debt Securities | The following table is a summary of the Company’s book value of securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law:
|  | March 31, 2021 |  |  | December 31, 2020 |
|  | (Dollars in thousands) |
Book value of pledged securities |  | $ | 459,251 |  |  | $ | 490,833 |

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
Name: | us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration