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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Measurements |
Schedule of assets and liabilities recorded at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements
​ | ​ | ​ | ​ | ​ | Quoted Prices | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | in Active | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | Markets for | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | Identical | ​ | Observable | ​ | Unobservable
​ | ​ | ​ | ​ | ​ | Assets | ​ | Inputs | ​ | Inputs
(in thousands) |  | Fair Value |  | (Level 1) |  | (Level 2) |  | (Level 3)
December 31, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 2,798 | ​ | $ | 2,798 |  | ​ | — |  | $ | —
U.S. government and federal agency obligations | ​ |  | 11,929 | ​ |  | — |  | ​ | 11,929 |  |  | —
U.S. government-sponsored enterprises | ​ |  | 22,874 | ​ |  | — |  | ​ | 22,874 |  |  | —
Obligations of states and political subdivisions | ​ |  | 58,744 | ​ |  | — |  | ​ | 58,744 |  |  | —
Mortgage-backed securities | ​ |  | 90,112 | ​ |  | — |  | ​ | 90,112 |  |  | —
Other debt securities | ​ | ​ | 10,344 | ​ | ​ | — | ​ | ​ | 10,344 | ​ | ​ | —
Bank-issued trust preferred securities | ​ | ​ | 1,229 | ​ | ​ | — | ​ | ​ | 1,229 | ​ | ​ | —
Equity securities | ​ | ​ | 32 | ​ | ​ | 32 | ​ | ​ | — | ​ | ​ | —
Mortgage servicing rights | ​ |  | 2,445 | ​ |  | — |  | ​ | — |  |  | 2,445
Total | ​ | $ | 200,507 | ​ | $ | 2,830 | ​ | $ | 195,232 |  | $ | 2,445
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 995 | ​ | $ | 995 |  | ​ | — |  | $ | —
U.S. government and federal agency obligations | ​ |  | 8,047 | ​ |  | — |  | ​ | 8,047 |  |  | —
U.S. government-sponsored enterprises | ​ |  | 22,283 | ​ |  | — |  | ​ | 22,283 |  |  | —
Obligations of states and political subdivisions | ​ |  | 33,789 | ​ |  | — |  | ​ | 33,789 |  |  | —
Mortgage-backed securities | ​ |  | 105,616 | ​ |  | — |  | ​ | 105,616 |  |  | —
Other debt securities | ​ | ​ | 3,053 | ​ | ​ | — | ​ | ​ | 3,053 | ​ | ​ | —
Bank-issued trust preferred securities | ​ | ​ | 1,310 | ​ | ​ | — | ​ | ​ | 1,310 | ​ | ​ | —
Equity securities | ​ | ​ | 13 | ​ | ​ | 13 | ​ | ​ | — | ​ | ​ | —
Mortgage servicing rights | ​ |  | 2,482 | ​ |  | — |  | ​ | — |  |  | 2,482
Total | ​ | $ | 177,588 | ​ | $ | 1,008 | ​ | $ | 174,098 |  | $ | 2,482
Schedule of summary of changes in Level 3 assets and liabilities measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​
​ |  | ​ | ​
​ | ​ | Fair Value Measurements Using
​ | ​ | Significant Unobservable Inputs
​ | ​ | (Level 3)
(in thousands) |  | Mortgage Servicing Rights
Balance at December 31, 2018 | ​ | $ | 2,931
Total (losses) or gains (realized/unrealized): | ​ | ​ | ​
Included in earnings | ​ |  | (739)
Included in other comprehensive income | ​ |  | —
Purchases | ​ |  | —
Sales | ​ |  | —
Issues | ​ |  | 290
Settlements | ​ |  | —
Balance at December 31, 2019 | ​ | $ | 2,482
Balance at beginning of period | ​ | ​ | ​
Total (losses) or gains (realized/unrealized): | ​ | ​ | ​
Included in earnings | ​ |  | (903)
Included in other comprehensive income | ​ |  | —
Purchases | ​ |  | —
Sales | ​ |  | —
Issues | ​ |  | 866
Settlements | ​ |  | —
Balance at December 31, 2020 | ​ | $ | 2,445
Schedule of valuation methods for instruments measured at fair value on a nonrecurring basis |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements Using
​ | ​ | ​ | ​ | ​ | Quoted Prices | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | in Active | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | Markets for | ​ | Other | ​ | Significant | ​ | ​ |
​ | ​ | ​ | ​ | ​ | Identical | ​ | Observable | ​ | Unobservable | ​ | ​ |
​ | ​ | Total | ​ | Assets | ​ | Inputs | ​ | Inputs | ​ | Total Gains
(in thousands) |  | Fair Value |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | (Losses)*
December 31, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Collateral dependent impaired loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial, financial, & agricultural | ​ | $ | 4,505 | ​ | $ | — | ​ | $ | — | ​ | $ | 4,505 |  | $ | (52)
Real estate mortgage - residential | ​ |  | 417 | ​ |  | — | ​ |  | — | ​ |  | 417 |  |  | (52)
Real estate mortgage - commercial | ​ |  | 22,581 | ​ |  | — | ​ |  | — | ​ |  | 22,581 |  |  | (39)
Installment and other consumer | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  |  | (21)
Total | ​ | $ | 27,503 | ​ | $ | — | ​ | $ | — | ​ | $ | 27,503 |  | $ | (164)
Other real estate and repossessed assets | ​ | $ | 12,291 | ​ | $ | — | ​ | $ | — | ​ | $ | 12,291 |  | $ | 219
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Collateral dependent impaired loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial, financial, & agricultural | ​ | $ | 379 | ​ | $ | — | ​ | $ | — | ​ | $ | 379 |  | $ | (132)
Real estate construction - commercial | ​ |  | 137 | ​ |  | — | ​ |  | — | ​ |  | 137 |  |  | —
Real estate mortgage - residential | ​ |  | 1,028 | ​ |  | — | ​ |  | — | ​ |  | 1,028 |  |  | (45)
Real estate mortgage - commercial | ​ |  | 1,119 | ​ |  | — | ​ |  | — | ​ |  | 1,119 |  |  | (18)
Installment and other consumer | ​ |  | 12 | ​ |  | — | ​ |  | — | ​ |  | 12 |  |  | (12)
Total | ​ | $ | 2,675 | ​ | $ | — | ​ | $ | — | ​ | $ | 2,675 |  | $ | (207)
Other real estate and repossessed assets | ​ | $ | 12,781 | ​ | $ | — | ​ | $ | — | ​ | $ | 12,781 |  | $ | (157)
​
* | Total gains (losses) reported for other real estate owned and repossessed assets includes charge-offs, valuation write-downs, and net losses taken during the periods reported.

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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