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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Measurements |
Schedule of balance of assets and liabilities which are measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 202,339 | ​ | $ | - | ​ | $ | - | ​ | $ | 202,339
U.S. government agencies | ​ | ​ | - | ​ | ​ | 61,888 | ​ | ​ | - | ​ | ​ | 61,888
U.S. government agencies mortgage-backed | ​ | ​ | - | ​ | ​ | 172,302 | ​ | ​ | - | ​ | ​ | 172,302
States and political subdivisions | ​ | ​ | - | ​ | ​ | 242,373 | ​ | ​ | 14,092 | ​ | ​ | 256,465
Corporate bonds | ​ | ​ | - | ​ | ​ | 9,887 | ​ | ​ | - | ​ | ​ | 9,887
Collateralized mortgage obligations | ​ | ​ | - | ​ | ​ | 672,967 | ​ | ​ | - | ​ | ​ | 672,967
Asset-backed securities | ​ | ​ | - | ​ | ​ | 236,877 | ​ | ​ | - | ​ | ​ | 236,877
Collateralized loan obligations | ​ | ​ | - | ​ | ​ | 79,763 | ​ | ​ | - | ​ | ​ | 79,763
Loans held-for-sale | ​ | ​ | - | ​ | ​ | 4,737 | ​ | ​ | - | ​ | ​ | 4,737
Mortgage servicing rights | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 7,097 | ​ | ​ | 7,097
Interest rate swap agreements | ​ | ​ | - | ​ | ​ | 3,494 | ​ | ​ | - | ​ | ​ | 3,494
Mortgage banking derivatives | ​ | ​ | - | ​ | ​ | 508 | ​ | ​ | - | ​ | ​ | 508
Total | ​ | $ | 202,339 | ​ | $ | 1,484,796 | ​ | $ | 21,189 | ​ | $ | 1,708,324
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap agreements, including risk participation agreements | ​ | $ | - | ​ | $ | 6,809 | ​ | $ | - | ​ | $ | 6,809
Total | ​ | $ | - | ​ | $ | 6,809 | ​ | $ | - | ​ | $ | 6,809
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury | ​ | $ | 4,117 | ​ | $ | - | ​ | $ | - | ​ | $ | 4,117
U.S. government agencies | ​ | ​ | - | ​ | ​ | 6,657 | ​ | ​ | - | ​ | ​ | 6,657
U.S. government agencies mortgage-backed | ​ | ​ | - | ​ | ​ | 17,209 | ​ | ​ | - | ​ | ​ | 17,209
States and political subdivisions | ​ | ​ | - | ​ | ​ | 244,940 | ​ | ​ | 4,319 | ​ | ​ | 249,259
Collateralized mortgage obligations | ​ | ​ | - | ​ | ​ | 56,585 | ​ | ​ | - | ​ | ​ | 56,585
Asset-backed securities | ​ | ​ | - | ​ | ​ | 131,818 | ​ | ​ | - | ​ | ​ | 131,818
Collateralized loan obligations | ​ | ​ | - | ​ | ​ | 30,533 | ​ | ​ | - | ​ | ​ | 30,533
Loans held-for-sale | ​ | ​ | - | ​ | ​ | 12,611 | ​ | ​ | - | ​ | ​ | 12,611
Mortgage servicing rights | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 4,224 | ​ | ​ | 4,224
Interest rate swap agreements | ​ | ​ | - | ​ | ​ | 9,388 | ​ | ​ | - | ​ | ​ | 9,388
Mortgage banking derivatives | ​ | ​ | - | ​ | ​ | 840 | ​ | ​ | - | ​ | ​ | 840
Total | ​ | $ | 4,117 | ​ | $ | 510,581 | ​ | $ | 8,543 | ​ | $ | 523,241
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap agreements, including risk participation agreements | ​ | $ | - | ​ | $ | 13,159 | ​ | $ | - | ​ | $ | 13,159
Total | ​ | $ | - | ​ | $ | 13,159 | ​ | $ | - | ​ | $ | 13,159
Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2021
​ | ​ | Securities available-for-sale | ​ | ​ | ​
​ | ​ | States and | ​ | Mortgage
​ | ​ | Political | ​ | Servicing
​ |  | Subdivisions |  | Rights
Beginning balance January 1, 2021 | ​ | $ | 4,319 | ​ | $ | 4,224
Total gains or losses | ​ | ​ | ​ | ​ | ​ | ​
Included in earnings | ​ | ​ | (20) | ​ | ​ | 2,420
Included in other comprehensive income | ​ | ​ | 801 | ​ | ​ | -
Purchases, issuances, sales, and settlements | ​ | ​ | ​ | ​ | ​ | ​
Purchases | ​ | ​ | 9,919 | ​ | ​ | -
Issuances | ​ | ​ | - | ​ | ​ | 1,612
Settlements | ​ | ​ | (927) | ​ | ​ | (1,159)
Ending balance December 31, 2021 | ​ | $ | 14,092 | ​ | $ | 7,097
​ | ​ | ​ | ​ | ​ | ​ | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2020
​ | ​ | Securities available-for-sale | ​ | ​ | ​
​ | ​ | States and | ​ | Mortgage
​ | ​ | Political | ​ | Servicing
​ |  | Subdivisions |  | Rights
Beginning balance January 1, 2020 | ​ | $ | 5,419 | ​ | $ | 5,935
Total gains or losses | ​ | ​ | ​ | ​ | ​ | ​
Included in earnings | ​ | ​ | (20) | ​ | ​ | (2,483)
Included in other comprehensive income | ​ | ​ | (628) | ​ | ​ | -
Purchases, issuances, sales, and settlements | ​ | ​ | ​ | ​ | ​ | ​
Purchases | ​ | ​ | 13,086 | ​ | ​ | -
Issuances | ​ | ​ | - | ​ | ​ | 2,288
Settlements | ​ | ​ | (13,538) | ​ | ​ | (1,516)
Ending balance December 31, 2020 | ​ | $ | 4,319 | ​ | $ | 4,224
​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of quantitative information about level 3 fair value measurements | The following table and commentary presents quantitative and qualitative information about Level 3 fair value measurements as of December 31, 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted
Measured at fair value | ​ | ​ | ​ | ​ | ​ | ​ | Significant Unobservable | ​ | ​ | ​ | Average
on a recurring basis: |  | Fair Value |  | Valuation Methodology |  | Inputs |  | Range of Input |  | of Inputs
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage servicing rights | ​ | $ | 7,097 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 11.0 - 15.0% | ​ | 11.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Prepayment Speed | ​ | 0.0 - 36.6% | ​ | 11.9 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
The following table and commentary presents quantitative and qualitative information about Level 3 fair value measurements as of December 31, 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted
Measured at fair value | ​ | ​ | ​ | ​ | ​ | ​ | Significant Unobservable | ​ | ​ | ​ | Average
on a recurring basis: |  | Fair Value |  | Valuation Methodology |  | Inputs |  | Range of Input |  | of Inputs
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage servicing rights | ​ | $ | 4,224 | ​ | Discounted Cash Flow | ​ | Discount Rate | ​ | 11.0 - 15.0% | ​ | 11.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | Prepayment Speed | ​ | 5.5 - 59.1% | ​ | 19.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of assets measured at fair value on a nonrecurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Individually evaluated loans1 | ​ | $ | - | ​ | $ | - | ​ | $ | 13,138 | ​ | $ | 13,138
Other real estate owned, net2 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,356 | ​ | ​ | 2,356
Total | ​ | $ | - | ​ | $ | - | ​ | $ | 15,494 | ​ | $ | 15,494
​
1 | Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, had a carrying amount of $18.5 million and a valuation allowance of $5.4 million, resulting in an increase of specific allocations within the provision for credit losses of $2.7 for the year ending December 31, 2021.
​
2 | OREO is measured at the lower of carrying or fair value less costs to sell, and had a net carrying amount of $2.4 million, which is made up of the outstanding balance of $3.7 million, net of a valuation allowance of $1.2 million and purchase accounting adjustments of $131,000 at December 31, 2021.
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Individually evaluated loans1 | ​ | $ | - | ​ | $ | - | ​ | $ | 9,675 | ​ | $ | 9,675
Other real estate owned, net2 | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,474 | ​ | ​ | 2,474
Total | ​ | $ | - | ​ | $ | - | ​ | $ | 12,149 | ​ | $ | 12,149
​
1 | Represents carrying value and related write-downs of loans for which adjustments are substantially based on the appraised value of collateral for collateral-dependent loans, had a carrying amount of $12.3 million and a valuation allowance of $2.6 million, resulting in an increase of specific allocations within the provision for loan and lease losses of $1.4 million for the year ending December 31, 2020.
​
2 | OREO is measured at the lower of carrying or fair value less costs to sell, and had a net carrying amount of $2.5 million, which is made up of the outstanding balance of $4.1 million, net of a valuation allowance of $1.6 million, at December 31, 2020.

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- Definition Tabular disclosure of the fair value measurement of assets and liabilities 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, 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, issuances, 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 or liability. + References No definition available. + Details
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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + 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 (bbb) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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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=123874694&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=123874694&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=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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