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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Taxes |
Schedule of components of income tax expense (benefit) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
Current federal | ​ | $ | 6,269 | ​ | $ | 4,815 | ​ | $ | -
Current state | ​ | ​ | 3,960 | ​ | ​ | 1,151 | ​ | ​ | 84
Deferred federal | ​ | ​ | (135) | ​ | ​ | 3,177 | ​ | ​ | 6,226
Deferred state | ​ | ​ | (511) | ​ | ​ | 3,259 | ​ | ​ | 3,614
Total income tax expenses | ​ | $ | 9,583 | ​ | $ | 12,402 | ​ | $ | 9,924
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of components of deferred tax assets and liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Allowance for credit losses | ​ | $ | 11,058 | ​ | $ | 6,082
Deferred compensation | ​ | ​ | 1,093 | ​ | ​ | 907
Goodwill amortization/impairment | ​ | ​ | 2,212 | ​ | ​ | 3,456
Stock based compensation | ​ | ​ | 1,356 | ​ | ​ | 1,622
Business combination adjustments | ​ | ​ | 255 | ​ | ​ | 1,547
OREO write-downs | ​ | ​ | 614 | ​ | ​ | 1,931
Federal recognized built-in loss ("RBIL") carryforward | ​ | ​ | 142 | ​ | ​ | 340
State net operating loss and RBIL carryforward | ​ | ​ | 60 | ​ | ​ | 326
Other assets | ​ | ​ | 2,182 | ​ | ​ | 2,270
Total deferred tax assets | ​ | ​ | 18,972 | ​ | ​ | 18,481
​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated depreciation on premises and equipment | ​ | ​ | (1,237) | ​ | ​ | (746)
Mortgage servicing rights | ​ | ​ | (1,261) | ​ | ​ | (1,779)
Amortization of core deposit intangible | ​ | ​ | (171) | ​ | ​ | (144)
State tax benefits | ​ | ​ | (930) | ​ | ​ | (927)
Other liabilities | ​ | ​ | (1,481) | ​ | ​ | (1,637)
Total deferred tax liabilities | ​ | ​ | (5,080) | ​ | ​ | (5,233)
Net deferred tax asset before adjustments related to other comprehensive income | ​ | ​ | 13,892 | ​ | ​ | 13,248
Tax effect of adjustments related to other comprehensive income | ​ | ​ | (5,771) | ​ | ​ | (1,789)
Net deferred tax asset | ​ | $ | 8,121 | ​ | $ | 11,459
​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of components of provision for deferred income taxes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | 2020 |  | 2019 |  | 2018
Provision for credit losses | $ | (4,976) | ​ | $ | (279) | ​ | $ | (426)
Deferred compensation | ​ | (186) | ​ | ​ | (242) | ​ | ​ | (15)
Amortization of core deposit intangible | ​ | 27 | ​ | ​ | 14 | ​ | ​ | 957
Stock based compensation | ​ | 266 | ​ | ​ | (245) | ​ | ​ | (511)
Business combination adjustments | ​ | 1,292 | ​ | ​ | 985 | ​ | ​ | 927
OREO write-downs | ​ | 1,317 | ​ | ​ | 406 | ​ | ​ | 48
Federal net operating loss and RBIL carryforward | ​ | 198 | ​ | ​ | 1,859 | ​ | ​ | 5,041
State net operating loss and RBIL carryforward | ​ | 266 | ​ | ​ | 3,708 | ​ | ​ | 2,986
Depreciation | ​ | 491 | ​ | ​ | 303 | ​ | ​ | 59
Mortgage servicing rights | ​ | (518) | ​ | ​ | (431) | ​ | ​ | 124
Goodwill amortization/impairment | ​ | 1,244 | ​ | ​ | 1,242 | ​ | ​ | 1,389
State tax benefits | ​ | 3 | ​ | ​ | (912) | ​ | ​ | (550)
Other, net | ​ | (70) | ​ | ​ | 28 | ​ | ​ | (189)
Total deferred tax (benefit) expense | $ | (646) | ​ | $ | 6,436 | ​ | $ | 9,840
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of difference between effective tax rates from federal statutory rates | Effective tax rates differ from federal statutory rates applied to financial statement income for the years ended December 31, due to the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
Tax at statutory federal income tax rate | ​ | $ | 7,856 | ​ | $ | 10,890 | ​ | $ | 9,227
Nontaxable interest income, net of disallowed interest deduction | ​ | ​ | (1,067) | ​ | ​ | (1,409) | ​ | ​ | (1,600)
BOLI income | ​ | ​ | (271) | ​ | ​ | (480) | ​ | ​ | (422)
State income taxes, net of federal benefit | ​ | ​ | 2,570 | ​ | ​ | 3,496 | ​ | ​ | 2,927
Stock based compensation | ​ | ​ | 297 | ​ | ​ | (207) | ​ | ​ | (305)
Other, net | ​ | ​ | 198 | ​ | ​ | 112 | ​ | ​ | 97
Total tax at effective tax rate | ​ | $ | 9,583 | ​ | $ | 12,402 | ​ | $ | 9,924
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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