Sierra Bancorp (BSRR) 10-K 10 Mar 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 01, 2022	Jun. 30, 2021
Cover [Abstract]
Entity Central Index Key	0001130144
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	000-33063
Entity Registrant Name	SIERRA BANCORP
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	33-0937517
Entity Address, Address Line One	86 North Main Street
Entity Address, City or Town	Porterville
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	93257
City Area Code	559
Local Phone Number	782-4900
Title of 12(b) Security	Common Stock, No Par Value
Trading Symbol	BSRR
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 358
Entity Common Stock, Shares Outstanding		15,254,467
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Auditor Name	Eide Bailly LLP
Auditor Firm ID	286
Auditor Location	San Ramon, California

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 63,147	$ 67,908
Interest bearing deposits in banks	194,381	3,509
Cash and cash equivalents	257,528	71,417
Securities available-for-sale	973,314	543,974
Loans and leases:
Gross loans and leases	1,989,726	2,463,111
Allowance for loan and lease losses	(14,256)	(17,738)
Deferred loan and lease fees, net	(1,865)	(3,147)
Net loans and leases	1,973,605	2,442,226
Foreclosed assets	93	971
Premises and equipment, net	23,571	27,505
Goodwill	27,357	27,357
Other intangible assets, net	3,275	4,307
Company-owned life insurance	54,242	52,539
Other assets	58,029	50,446
Total assets	3,371,014	3,220,742
Deposits:
Noninterest bearing	1,084,544	943,664
Interest bearing	1,697,028	1,680,942
Total deposits	2,781,572	2,624,606
Repurchase agreements	106,937	39,138
Short-term borrowings		142,900
Long-term debt	49,141
Subordinated debentures, net	35,302	35,124
Other liabilities	35,568	35,078
Total liabilities	3,008,520	2,876,846
Commitments and contingent liabilities (Notes 6 & 14)
Shareholders' equity
Serial Preferred stock, no par value; 10,000,000 shares authorized; none issued
Common stock, no par value; 24,000,000 shares authorized; 15,270,010 and 15,388,423 shares issued and outstanding in 2021 and 2020, respectively	113,007	113,384
Additional paid-in capital	3,910	3,736
Retained earnings	234,410	208,371
Accumulated other comprehensive gain, net of taxes of $(4,687) in 2021 and $(7,725) in 2020	11,167	18,405
Total shareholders' equity	362,494	343,896
Total liabilities and shareholders' equity	$ 3,371,014	$ 3,220,742

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Preferred Stock, No Par Value	$ 0	$ 0
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	24,000,000	24,000,000
Common Stock, Shares, Issued	15,270,010	15,388,423
Common Stock, Shares, Outstanding	15,270,010	15,388,423
Accumulated Other Comprehensive Income (Loss), Tax	$ (4,687)	$ (7,725)

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest and dividend income
Loans and leases, including fees	$ 99,249	$ 96,181	$ 95,898
Taxable securities	7,239	8,199	10,139
Tax-exempt securities	6,218	5,707	4,534
Federal funds sold and other	370	156	376
Total interest income	113,076	110,243	110,947
Interest expense
Deposits	2,390	3,948	11,380
Short-term borrowings	213	243	362
Long-term debt	468
Subordinated debentures	979	1,217	1,836
Total interest expense	4,050	5,408	13,578
Net interest income	109,026	104,835	97,369
(Benefit) provision for loan and lease losses	(3,650)	8,550	2,550
Net interest income after provision for loan and lease losses	112,676	96,285	94,819
Noninterest income
Net gains (losses) on sale of securities available-for-sale	11	390	(198)
Increase in cash surrender value of life insurance	2,648	2,412	2,184
Other income	5,089	4,560	2,165
Total noninterest income	28,079	26,150	23,477
Noninterest expense
Salaries and employee benefits	42,431	40,178	35,978
Occupancy and equipment	9,837	9,842	9,845
Acquisition costs			22
Other	31,288	25,892	24,733
Total noninterest expense	83,556	75,912	70,578
Income before income taxes	57,199	46,523	47,718
Provision for income taxes	14,187	11,079	11,757
Net income	$ 43,012	$ 35,444	$ 35,961
Earnings per share
Basic (in dollars per share)	$ 2.82	$ 2.33	$ 2.35
Diluted (in dollars per share)	$ 2.80	$ 2.32	$ 2.33
Weighted average shares outstanding, basic (in shares)	15,241,957	15,216,749	15,311,113
Weighted average shares outstanding, diluted (in shares)	15,353,445	15,280,325	15,437,111
Deposit Account [Member]
Noninterest income
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,846	$ 11,765	$ 12,742

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Comprehensive Income [Abstract]
Net income	$ 43,012	$ 35,444	$ 35,961
Unrealized gains on securities:
Unrealized holding gain (loss) arising during period	(10,265)	18,099	17,686
Reclassification adjustment for (gains) losses included in net income	(11)	(390)	198
Other comprehensive gain (loss), before tax	(10,276)	17,709	17,884
Income tax (expense) benefit related to items of other comprehensive income	3,038	(5,236)	(5,286)
Total other comprehensive gain (loss), net of tax	(7,238)	12,473	12,598
Comprehensive income	$ 35,774	$ 47,917	$ 48,559

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Reclassification adjustment for (losses) gains on securities available-for-sale included in net income, tax	$ (3)	$ (115)	$ 59

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Total
Balance at Dec. 31, 2018	$ 112,507	$ 3,066	$ 164,117	$ (6,666)	$ 273,024
Balance (in shares) at Dec. 31, 2018	15,300,460
Increase (Decrease) in Shareholders' Equity
Net income			35,961		35,961
Other comprehensive income (loss), net of tax				12,598	12,598
Exercise of stock options	$ 1,337	(249)			1,088
Exercise of stock options (in shares)	82,681
Stock based compensation expense		490			490
Stock repurchase	$ (665)		(1,879)		(2,544)
Stock repurchase (in shares)	(98,603)
Cash dividends			(11,332)		(11,332)
Balance at Dec. 31, 2019	$ 113,179	3,307	186,867	5,932	309,285
Balance (in shares) at Dec. 31, 2019	15,284,538
Increase (Decrease) in Shareholders' Equity
Net income			35,444		35,444
Other comprehensive income (loss), net of tax				12,473	12,473
Exercise of stock options	$ 1,034	(259)			775
Exercise of stock options (in shares)	67,050
Stock based compensation expense		688			688
Stock based compensation expense (in shares)	148,885
Stock repurchase	$ (829)		(1,733)		(2,562)
Stock repurchase (in shares)	(112,050)
Cash dividends			(12,207)		(12,207)
Balance at Dec. 31, 2020	$ 113,384	3,736	208,371	18,405	343,896
Balance (in shares) at Dec. 31, 2020	15,388,423
Increase (Decrease) in Shareholders' Equity
Net income			43,012		43,012
Other comprehensive income (loss), net of tax				(7,238)	(7,238)
Stock options exercised; net of shares surrendered for cashless exercises	$ 422	(141)			281
Stock options exercised; net of shares surrendered for cashless exercises (in shares)	25,452
Restricted stock granted	$ 680	(680)
Restricted stock granted (in shares)	73,912
Restricted stock surrendered due to employee tax liability	$ (89)		(203)		(292)
Restricted stock surrendered due to employee tax liability (in shares)	(12,122)
Restricted stock forfeited / cancelled (in shares)	(18,217)
Stock based compensation - stock options		118			118
Stock based compensation - restricted stock		877			877
Stock repurchase	$ (1,390)		(3,538)		$ (4,928)
Stock repurchase (in shares)	(187,438)				(187,438)
Cash dividends			(13,232)		$ (13,232)
Balance at Dec. 31, 2021	$ 113,007	$ 3,910	$ 234,410	$ 11,167	$ 362,494
Balance (in shares) at Dec. 31, 2021	15,270,010

CONSOLIDATED STATEMENT OF CHA_2

CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY
Common Stock, Dividends, Per Share, Declared	$ 0.87	$ 0.80	$ 0.74

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 43,012	$ 35,444	$ 35,961
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss on sales of securities	(11)	(390)	198
(Gain) loss on disposal of fixed assets	(180)		28
Gain on sale on foreclosed assets	(153)	(10)	(107)
Writedown on foreclosed assets	174	124	77
Stock based compensation expense	995	688	490
(Benefit) provision for loan and lease losses	(3,650)	8,550	2,550
Depreciation and amortization	3,237	3,025	2,988
Net amortization on securities premiums and discounts	4,914	4,789	4,449
Accretion of discounts for loans acquired and net deferred loan fees	(411)	(663)	(1,023)
Increase in cash surrender value of life insurance policies	(2,648)	(2,412)	(2,184)
Amortization of core deposit intangible	1,032	1,074	1,074
Decrease (increase) in interest receivable and other assets	6,435	(488)	(9,224)
Increase (decrease) in other liabilities	1,602	(8,151)	9,662
Deferred income tax provision (benefit)	85	(2,611)	(97)
Increase in equity securities	(2,523)	(447)	(232)
Net amortization of partnership investment	746	1,505	2,127
Net cash provided by operating activities	52,656	40,027	46,737
Cash flows from investing activities:
Maturities and calls of securities available for sale	10,390	12,385	9,809
Proceeds from sales of securities available for sale	148	20,298	60,510
Purchases of securities available for sale	(568,174)	(71,816)	(190,168)
Principal pay downs on securities available for sale	113,117	109,267	92,766
Net purchases of FHLB stock			(833)
Loan originations and payments, net	472,589	(697,305)	(32,376)
Purchases of premises and equipment, net	(371)	(2,916)	(783)
Proceeds from sales of fixed assets	1,426		10
Proceeds from sales of foreclosed assets	950	2,445	7,955
Purchase of bank owned life insurance	(39)	(210)	(440)
Liquidation of bank-owned life insurance		326	260
Proceeds from BOLI death benefit	984	274
Net increase in partnership investment	(10,400)
Net cash provided by (used in) investing activities	20,620	(627,252)	(53,290)
Cash flows from financing activities:
Increase in deposits	156,966	456,232	52,034
(Decrease) increase in borrowed funds	(42,900)	22,900	(36,100)
Increase in repurchase agreements	67,799	13,427	9,352
(Decrease) increase in fed funds purchased	(100,000)	100,000
Cash dividends paid	(13,232)	(12,207)	(11,332)
Repurchases of common stock	(5,220)	(2,562)	(2,544)
Stock options exercised	281	775	1,088
Proceeds from issuance of subordinated debt	49,141
Net cash provided by financing activities	112,835	578,565	12,498
Increase (decrease) in cash and due from banks	186,111	(8,660)	5,945
Cash and cash equivalents, beginning of period	71,417	80,077	74,132
Cash and cash equivalents, end of period	257,528	71,417	80,077
Cash paid during the year for:
Interest	3,649	6,007	13,769
Cash paid during the year for:
Income taxes	13,554	14,490	12,000
Supplemental noncash disclosures:
Real estate acquired through foreclosure	93	2,562	27
Change in unrealized net gains (losses) on securities available-for-sale	$ (10,276)	17,709	17,884
Operating right-of-use asset pursuant to adoption of ASU 2016-02		0	8,308
Operating lease liability pursuant to adoption of ASU 2016-02		$ 0	$ 8,915

The Business of Sierra Bancorp

The Business of Sierra Bancorp	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Business of Sierra Bancorp	1. THE BUSINESS OF SIERRA BANCORP Sierra Bancorp (the “Company”) is a California corporation registered as a bank holding company under the Bank Holding Company Act of 1956, as amended, and is headquartered in Porterville, California. The Company was incorporated in November 2000 and acquired all of the outstanding shares of Bank of the Sierra (the “Bank”) in August 2001. The Company’s principal subsidiary is the Bank, and the Company exists primarily for the purpose of holding the stock of the Bank and of such other subsidiaries it may acquire or establish. The Company’s only other direct subsidiaries are Sierra Statutory Trust II, Sierra Capital Trust III and Coast Bancorp Statutory Trust II, which were formed solely to facilitate the issuance of capital trust pass-through securities. At December 31, 2021, the Bank operated 35 full service branch offices, an online branch and provides specialized lending services through an agricultural credit center, an SBA center, Mortgage Warehouse lending divisions and a dedicated loan production office in Roseville, California. The Bank’s deposits are insured by the Federal Deposit Insurance Corporation (FDIC) up to applicable legal limits. The Bank maintains a diversified loan portfolio comprised of agricultural, commercial, consumer, real estate, construction and mortgage loans. Loans are made in California within the market area of the South Central San Joaquin Valley, the Central Coast, Ventura County and neighboring communities. These areas have diverse economies with principal industries being agriculture, real estate and light manufacturing.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Consolidation and Basis of Presentation The consolidated financial statements include the accounts of the Company and the consolidated accounts of its wholly-owned subsidiary, Bank of the Sierra. All significant intercompany balances and transactions have been eliminated. Certain reclassifications have been made to prior years’ balances to conform to classifications used in 2021. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America (U.S. GAAP) and prevailing practices within the banking industry. In accordance with U.S. GAAP, the Company’s investments in Sierra Statutory Trust II, Sierra Capital Trust III and Coast Bancorp Statutory Trust II are not consolidated and are accounted for under the equity method and included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the trusts are reflected on the Company’s consolidated balance sheet. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for loan and lease losses and the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans. In connection with the determination of the allowances for loan and lease losses and other real estate, management obtains independent appraisals for significant properties, evaluates the overall loan portfolio characteristics and delinquencies and monitors economic conditions. Cash Flows For purposes of reporting cash flows, cash and cash equivalents include cash and deposits with other financial institutions with original maturities within 90 days, and federal funds sold. Net cash flows are reported for customer loan and deposit transactions, interest bearing deposits in other financial institutions, and fed funds purchased and repurchase agreements. Securities Debt securities may be classified as held to maturity and carried at amortized cost when management has the positive ability and intent to hold them to maturity. Debt securities are classified as available for sale when they might be sold before maturity. Equity securities with readily determinable fair values are classified as available for sale. Debt securities available for sale are carried at fair value with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premium or discount. Premiums or discounts on securities are amortized on the level-yield method without anticipating prepayments. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Management determines the appropriate classification of its investments at the time of purchase and may only change the classification in certain limited circumstances. All transfers between categories are accounted for at fair value. Although the Company currently has the intent and the ability to hold the securities in its investment portfolio to maturity, the securities are all marketable and are currently classified as “available for sale” to allow maximum flexibility with regard to interest rate risk and liquidity management. Management evaluates securities for other-than-temporary impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of the impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. FHLB Stock and Other Investments The Bank is a member of the Federal Home Loan Bank ("FHLB") system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost in other assets, and periodically evaluated for impairment based on the ultimate recovery of par value. Both cash and stock dividends are reported as income. The Bank’s investment in FHLB stock was approximately $12.4 million at December 31, 2021 and $10.7 million at December 31, 2020. Pursuant to the adoption of ASU 2016-01 on January 1, 2018, the Company elected the measurement alternative for measuring equity securities without readily determinable fair values at cost less impairment, plus or minus observable price changes in orderly transactions. The carrying amount of equity securities without readily determinable fair values is $3.3 million and $2.5 million at December 31, 2021 and 2020, respectively. Equity securities primarily consist of an investment in Pacific Coast Bankers’ Bank (“PCBB”). A remeasurement gain of $0.9 million, $0.4 million and $0.2 million was recorded to income during the years ended December 31, 2021, 2020 and 2019, on PCBB stock. $2.7 million in cumulative remeasurement gains have been recorded as of December 31, 2021 on PCBB stock. Adjustments to the carrying value of PCBB stock were based on a third party valuation. Loans Held for Sale The Company may originate loans intended to be sold on the secondary market. Loans originated and intended for sale in the secondary market are carried at cost which approximates fair value since these loans are typically sold shortly after origination. The loan’s cost basis includes unearned deferred fees and costs, and premiums and discounts. If loans held for sale remain on our books for an extended period of time the fair value of those loans is determined using quoted secondary market prices. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Loans that might be held for sale by the Company typically consist of residential real estate loans. Loans classified as held for sale, if any, are disclosed in Note 4 to the consolidated financial statements. Gains and losses on sales of loans are recognized at the time of sale and are calculated based on the difference between the selling price and the allocated book value of loans sold. Book value allocations are determined in accordance with U.S. GAAP. Any inherent risk of loss on loans sold is transferred to the buyer at the date of sale. The Company has issued various representations and warranties associated with the sale of loans. These representations and warranties may require the Company to repurchase loans with underwriting deficiencies as defined per the applicable sales agreements and certain past due loans within 90 days of the sale. The Company did not experience losses during the years ended December 31, 2021, 2020, or 2019 regarding these representations and warranties. Loans and Leases (Financing Receivables) Our credit quality classifications of Loans and Leases include Pass, Special Mention, Substandard and Impaired. These classifications are defined in Note 4 to the consolidated financial statements. Loans and leases that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, purchase premiums and discounts, write-downs, and an allowance for loan and lease losses. Loan and lease origination fees, net of certain deferred origination costs, and purchase premiums and discounts are recognized in interest income as an adjustment to yield of the related loans and leases over the contractual life of the loan using both the effective interest and straight line methods without anticipating prepayments. Interest income for all performing loans, regardless of classification (Pass, Special Mention, Substandard and Impaired), is recognized on an accrual basis, with interest accrued daily. Costs associated with successful loan originations are netted from loan origination fees, with the net amount (net deferred loan fees) amortized over the contractual life of the loan in interest income. If a loan has scheduled periodic payments, the amortization of the net deferred loan fee is calculated using the effective interest method over the contractual life of the loan. If the loan does not have scheduled payments, such as a line of credit, the net deferred loan fee is recognized as interest income on a straight line basis over the contractual life of the loan. Fees received for loan commitments are recognized as interest income over the term of the commitment. When loans are repaid, any remaining unamortized balances of deferred fees and costs are accounted for through interest income. Generally, the Company places a loan or lease on nonaccrual status and ceases recognizing interest income when it has become delinquent more than 90 days and/or when Management determines that the repayment of principal and collection of interest is unlikely. The Company may decide that it is appropriate to continue to accrue interest on certain loans more than 90 days delinquent if they are well-secured by collateral and collection is in process. When a loan is placed on nonaccrual status, any accrued but uncollected interest for the loan is reversed out of interest income in the period in which the loan’s status changed. For loans with an interest reserve, i.e., where loan proceeds are advanced to the borrower to make interest payments, all interest recognized from the inception of the loan is reversed when the loan is placed on non-accrual. Once a loan is on non-accrual status subsequent payments received from the customer are applied to principal, and no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required. Generally, loans and leases are not restored to accrual status until the obligation is brought current and has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Impaired loans are classified as either nonaccrual or accrual, depending on individual circumstances regarding the collectability of interest and principal according to the contractual terms. Purchased Credit Impaired Loans The Company purchases individual loans and groups of loans, some of which may show evidence of credit deterioration since origination. These purchased credit impaired (“PCI”) loans are recorded at the amount paid, since there is no carryover of the seller’s allowance for loan and lease losses. After acquisition, additional deterioration in credit is recognized by an increase in the allowance for loan and lease losses. Such PCI loans are accounted for individually or aggregated into pools of loans based on common risk characteristics. The Company estimates the amount and timing of expected cash flows for the loan or pool, and the expected cash flows in excess of amount paid is recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loan’s or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded as a provision for loan and lease losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income Loans Modified in a Troubled Debt Restructuring Loans are considered to have been modified in a troubled debt restructuring (“TDR”) when due to a borrower’s financial difficulties the Company makes certain concessions to the borrower that it would not otherwise consider. Modifications may include interest rate reductions, principal or interest forgiveness, forbearance, and other actions intended to minimize economic loss and to avoid foreclosure or repossession of collateral. Generally, a non-accrual loan that has been modified in a TDR remains on non-accrual status for a period of six months to demonstrate that the borrower is able to meet the terms of the modified loan. However, performance prior to the modification, or significant events that coincide with the modification, are included in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of loan modification or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains on non-accrual status. A TDR is generally considered to be in default when it appears likely that the customer will not be able to repay all principal and interest pursuant to the terms of the restructured agreement. Allowance for Loan and Lease Losses The allowance for loan and lease losses is maintained at a level which, in management’s judgment, is adequate to absorb loan and lease losses inherent in the loan and lease portfolio. The allowance for loan and lease losses is increased by a provision for loan and lease losses, which is charged to expense, and by principal recovered on charged-off balances. It is reduced by principal charge-offs. The amount of the allowance is based on management’s evaluation of the collectability of the loan and lease portfolio, changes in its risk profile, credit concentrations, historical trends, and economic conditions. This evaluation also considers the balance of impaired loans and leases. A loan or lease is impaired when it is probable that the Company will be unable to collect all contractual principal and interest payments due in accordance with the terms of the loan or lease agreement. The impairment on certain individually identified loans or leases is measured based on the present value of expected future cash flows discounted at the original effective interest rate of the loan or lease. As a practical expedient, impairment may be measured based on the loan’s or lease’s observable market price or the fair value of collateral if the loan or lease is collateral dependent. The amount of impairment, if any, is recorded through the provision for loan and lease losses and is added to the allowance for loan and lease losses, with any changes over time recognized as additional bad debt expense in our provision for loan and lease losses. Impaired loans with homogenous characteristics, such as one-to-four family residential mortgages and consumer installment loans, may be subjected to a collective evaluation for impairment, considering delinquency and repossession statistics, historical loss experience, and other factors. General reserves cover non-impaired loans and are based on historical net loss rates for each portfolio segment by call report code, adjusted for the effects of qualitative or environmental factors that are likely to cause estimated credit losses as of the evaluation date to differ from the portfolio segment’s historical loss experience. Qualitative factors include consideration of the following: changes in lending policies and procedures; changes in international, national, regional, and local economic and business conditions and developments; changes in the nature and volume of the portfolio; changes in the experience, ability and depth of lending management and staff; changes in the volume and severity of past due, nonaccrual and other adversely graded loans; changes in quality of the loan review system; changes in the value of the underlying collateral for collateral-dependent loans; concentrations of credit; and the effect of the other external factors such as competition and legal and regulatory requirements. Most of the Company’s business activity is with customers located in California within the Southern Central San Joaquin Valley; in the corridor stretching between Santa Paula and Santa Clarita in Southern California, and on the Central Coast. Therefore the Company’s exposure to credit risk is significantly affected by changes in the economy in those regions. The Company considers this concentration of credit risk when assessing and assigning qualitative factors in the allowance for loan and lease losses. Portfolio segments identified by the Company include Agricultural, Commercial and Industrial, Real Estate, Small Business Administration, and Consumer loans. Relevant risk characteristics for these portfolio segments generally include debt service coverage, loan-to-value ratios and financial performance on non-consumer loans; and credit scores, debt-to-income ratios, collateral type and loan-to-value ratios for consumer loans. Though management believes the allowance for loan and lease losses to be adequate, ultimate losses may vary from their estimates. However, estimates are reviewed periodically, and as adjustments become necessary they are reported in earnings during the periods they become known. In addition, the FDIC and the California Department of Financial Protection and Innovation, as an integral part of their examination processes, review the allowance for loan and lease losses. These agencies may require additions to the allowance for loan and lease losses based on their judgment about information available at the time of their examinations. Reserve for Off-Balance Sheet Commitments In addition to the exposure to credit loss from outstanding loans, the Company is also exposed to credit loss from certain off-balance sheet commitments such as unused commitments from revolving lines of credit, mortgage warehouse lines of credit, construction loans and commercial and standby letters of credit. Because the available funds have not yet been disbursed on these commitments the estimated losses are not included in the calculation of the ALLL. The reserve for off-balance sheet commitments is an estimated loss contingency which is included in other liabilities on the Consolidated Balance Sheets. The adjustments to the reserve for off-balance sheet commitments are reported within noninterest expense. This reserve is for estimated losses that could occur when the Company is contractually obligated to make a payment under these instruments and must seek repayment from a party that may not be as financially sound in the current period as it was when the commitment was originally made. Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. The useful lives of premises range between twenty-five three Impairment of long-lived assets is evaluated by management based upon an event or changes in circumstances surrounding the underlying assets which indicate long-lived assets may be impaired. Foreclosed Assets Foreclosed assets include real estate and other property acquired in full or partial settlement of loan obligations. Upon acquisition, any excess of the recorded investment in the loan balance over the appraised fair market value, net of estimated selling costs, is charged against the allowance for loan and lease losses. A valuation allowance for losses on foreclosed assets is maintained to provide for subsequent declines in value. The allowance is established through a provision for losses on foreclosed assets which is included in other noninterest expense. Subsequent gains or losses on sales or write-downs resulting from permanent impairments are recorded in other noninterest expense as incurred. Operating costs after acquisition are expensed. The Company had one foreclosed residential real estate property recorded at December 31, 2021, as a result of obtaining physical possession of the property. At December 31, 2021, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceeds were in process was $.008 million. Goodwill and Other Intangible Assets The Company acquired Sierra National Bank in 2000, Santa Clara Valley Bank in 2014, Coast National Bank in 2016, and Ojai Community Bank and the Woodlake Branch of Citizen’s Business Bank in 2017. Goodwill resulting from business combinations after January 1, 2009 is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but are tested for impairment at least annually or more frequently if events and circumstances exist which indicate that an impairment test should be performed. The Company selected December 31, 2021 as the date to perform the annual impairment test for 2021. Goodwill is the only intangible asset with an indefinite life on our balance sheet. There was no impairment recognized for the years ended December 31, 2021, 2020, and 2019. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. The Company’s other intangible assets consist solely of core deposit intangible assets (CDI’s) arising from the acquisitions of Santa Clara Valley Bank, Coast National Bank, a Citizen’s Business Bank Porterville branch deposit portfolio, Ojai Community Bank, the Woodlake Branch of Citizen’s Business Bank and the Lompoc branch of Santa Maria Community Bank. All of the CDI’s are being amortized on a straight-line basis over eight years, except for the Citizen’s Business Bank Porterville branch deposit portfolio which is being amortized on a straight-line basis over five years. Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded. Details regarding these commitments and financial instruments are discussed in detail in Note 14 to the consolidated financial statements. Income Taxes The Company files its income taxes on a consolidated basis with its subsidiary. The allocation of income tax expense represents each entity’s proportionate share of the consolidated provision for income taxes. Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax basis of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely to be realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. We have determined that as of December 31, 2021 all tax positions taken to date are highly certain and, accordingly, no accounting adjustment has been made to the financial statements. The Company recognizes interest and penalties related to uncertain tax positions as part of income tax expense. Salary Continuation Agreements and Directors’ Retirement Plan The Company has entered into agreements to provide members of the Board of Directors and certain key executives, or their designated beneficiaries, with annual benefits for up to fifteen years after retirement or death. The Company accrues for these future benefits from the effective date of the plan until the director’s or executive’s expected retirement date in a systematic and rational manner. At the consolidated balance sheet date, the amount of accrued benefits equals the then present value of the benefits expected to be provided to the director or employee, any beneficiaries, and covered dependents in exchange for the director’s or employee’s services to that date. Comprehensive Income Comprehensive income consists of net income and other comprehensive income. Other comprehensive income includes fluctuations in unrealized gains and losses on securities available for sale, net of an adjustment for the effects of realized gains and losses and any applicable tax. Comprehensive income is a more inclusive financial reporting methodology that includes disclosure of other comprehensive income that historically has not been recognized in the calculation of net income. Unrealized gains and losses on the Company’s available for sale securities, net of tax, are included in other comprehensive income after adjusting for the effects of realized gains and losses. Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the consolidated statements of comprehensive income. Stock-Based Compensation At December 31, 2021, the Company had one stock-based compensation plan, the Sierra Bancorp 2017 Stock Incentive Plan (the “2017 Plan”), which was adopted by the Company’s Board of Directors on March 16, 2017 and approved by the Company’s shareholders on May 24, 2017. The 2017 Plan replaced the Company’s 2007 Stock Incentive Plan (the “2007” Plan), which expired by its own terms on March 15, 2017. Options to purchase shares granted under the 2007 Plan that remained outstanding were unaffected by that plan’s termination. The 2017 Plan covers 850,000 shares of the Company’s authorized but unissued common stock, subject to adjustment for stock splits and dividends, and provides for the issuance of both “incentive” and “nonqualified” stock options to salaried officers and employees, and of “nonqualified” stock options to non-employee directors. The 2017 Plan also provides for the issuance of restricted stock awards to these same classes of eligible participants. Compensation cost and director’s expense is recognized for stock options and restricted stock awards issued to employees and directors and is recognized over the required service period, generally defined as the vesting period. The Company is using the Black-Scholes model to estimate the fair value of stock options, while the market price of the Company’s common stock at the date of grant is used for restricted stock awards. The “multiple option” approach for stock options is used to allocate the resulting valuation to actual expense for current period. Expected volatility is based on historical volatility of the Company’s common stock. The Company uses historical data to estimate stock option exercise and post-vesting termination behavior. The expected term of stock options granted is based on historical data and represents the period of time that options granted are expected to be outstanding subsequent to vesting, which takes into account that the options are not transferable. The risk-free interest rate for the expected term of the stock option is based on the U.S. Treasury yield curve in effect at the time of the grant. The fair value of each stock option is estimated on the date of grant using the following assumptions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 Dividend yield ​ 3.02% ​ 2.62% Expected Volatility ​ 25.06% ​ 34.57% Risk-free interest rate ​ 1.47% ​ 2.70% Expected option life ​ 6.4 years ​ 5.4 years ​ No stock options were granted during the year ended December 31, 2021. Revenue Recognition Revenue from contracts with customers subject to ASC 606 comprises the noninterest income earned by the Company in exchange for services provided to customers. Income associated with customer contracts generally involve transaction prices that are fixed and performance obligations which are satisfied as services are rendered. In most cases recognition occurs within a single financial reporting period as there is little or no judgement involved in the timing of revenues. We generally act in a principal capacity, on our own behalf, in most of our contracts with customers. In such transactions, we recognize revenue and the related costs to provide our services on a gross basis in our financial statements. Service Charges on Deposit Accounts comprise charges on retail and business accounts. Business customers can earn credits depending on account type and deposit balances maintained with the Company, which may be used to offset fees. Fees and credits are based on predetermined, agreed-upon rates. In some cases, we act in an agent capacity, deriving revenue through assisting other entities in transactions with our customers. In such transactions, we recognize revenue and those related costs to provide services on a gross basis in our financial statements. Debit card interchange income is derived from our customers’ use of various interchange and ATM/debit card networks which are the primary sources of revenue generated in an agent capacity. Recent Accounting Pronouncements In September 2016 the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments On March 22, 2020, a statement was issued by our banking regulators and titled the “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus” (the “Interagency Statement”) that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of COVID-19. Additionally, Section 4013 of the CARES Act, that passed on March 27, 2020, further provides that a qualified loan modification is exempt by law from classification as a troubled debt restructuring (“TDR”) as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the COVID-19 outbreak declared by the President of the United States under the National Emergencies Act (50 U.S.C. 1601 et seq.) terminates. The Interagency Statement was subsequently revised in April 2020 to clarify the interaction of the original guidance with Section 4013 of the CARES Act, as well as setting forth the banking regulators’ views on consumer protection considerations. In accordance with such guidance, we processed short-term modifications for 311 loans and $424.9 million made in response to COVID-19 to borrowers who were current and otherwise not past due. These include short-term, 180 days or less, modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. See Note 4 for further information on remaining non-TDR loan modifications. The Interagency Guidance and Section 4013 did not have a material impact on the Company’s financial statements. ​ ​

Securities Available-for-Sale

Securities Available-for-Sale	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities Available-for-Sale	3. SECURITIES AVAILABLE-FOR-SALE The amortized cost and fair value of the securities available-for-sale are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government agencies ​ $ 1,546 ​ $ 28 ​ $ — ​ $ 1,574 Mortgage-backed securities ​ ​ 303,912 ​ ​ 4,772 ​ ​ (1,957) ​ ​ 306,727 State and political subdivisions ​ ​ 290,729 ​ ​ 13,807 ​ ​ (268) ​ ​ 304,268 Corporate bonds ​ ​ 28,436 ​ ​ 94 ​ ​ (1) ​ ​ 28,529 Collateralized loan obligations ​ ​ 332,836 ​ ​ 68 ​ ​ (688) ​ ​ 332,216 Total securities ​ $ 957,459 ​ $ 18,769 ​ $ (2,914) ​ $ 973,314 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government agencies ​ $ 1,725 ​ $ 75 ​ $ — ​ $ 1,800 Mortgage-backed securities ​ ​ 304,108 ​ ​ 10,389 ​ ​ (62) ​ ​ 314,435 State and political subdivisions ​ ​ 212,011 ​ ​ 15,728 ​ ​ — ​ ​ 227,739 Total securities ​ $ 517,844 ​ $ 26,192 ​ $ (62) ​ $ 543,974 ​ For the years ended December 31, 2021, 2020, and 2019, proceeds from sales of securities available-for-sale were $0.1 million, $20.3 million, and $60.5 million, respectively. Gains and losses on the sale of investment securities are recorded on the trade date and are determined using the specific identification method. Gross gains and losses from the sales and calls of securities for the years ended were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 2019 Gross gains on sales and calls of securities ​ $ 11 ​ $ 433 ​ $ 230 Gross losses on sales and calls of securities ​ ​ — ​ ​ (43) ​ ​ (428) Net gains (losses) on sales and calls of securities ​ $ 11 ​ $ 390 ​ $ (198) ​ The Company has reviewed all sectors and securities in the portfolio for impairment. During the year ended December 31, 2021 the Company realized gains through earnings from the sale and call of 21 debt securities for $0.01 million. There were no securities sold during 2021 for which a loss was realized. During the year ended December 31, 2020, the Company realized gains through earnings from the sale and call of 60 debt securities for $0.43 million. The securities were sold with 9 other debt securities, for which a $0.04 million loss was realized. During the year ended December 31, 2019 the Company realized gains through earnings from the sale and call of 74 debt securities for $0.2 million. The securities were sold with 108 other debt securities, for which a $0.4 million loss was realized, to improve the structure of the portfolio at year end. At December 31, 2021 and 2020, the Company had 99 and 2 securities with unrealized gross losses, respectively. Information pertaining to these securities aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ Less than twelve months ​ Twelve months or longer ​ Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value U.S. government agencies ​ $ — ​ $ — ​ $ — ​ $ — Mortgage-backed securities ​ ​ (1,797) ​ ​ 107,026 ​ ​ (160) ​ ​ 2,808 State and political subdivisions ​ ​ (268) ​ ​ 30,170 ​ ​ — ​ ​ — Corporate bonds ​ ​ (1) ​ ​ 499 ​ ​ — ​ ​ — Collateralized loan obligations ​ ​ (688) ​ ​ 175,581 ​ ​ — ​ ​ — Total ​ $ (2,754) ​ $ 313,276 ​ $ (160) ​ $ 2,808 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Less than twelve months ​ Twelve months or longer ​ Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value U.S. government agencies ​ $ — ​ $ — ​ $ — ​ $ — Mortgage-backed securities ​ ​ (62) ​ ​ 4,286 ​ ​ — ​ ​ — State and political subdivisions ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total ​ $ (62) ​ $ 4,286 ​ $ — ​ $ — ​ The Company has concluded as of December 31, 2021 that all remaining securities, currently in an unrealized loss position, are not other-than-temporarily-impaired. This assessment was based on the following factors: 1) the Company has the ability to hold the securities, 2) the Company does not intend to sell the securities, 3) the Company does not anticipate it will be required to sell the securities before recovery, 4) and the Company expects to eventually recover the entire amortized cost basis of the securities. The amortized cost and estimated fair value of securities available-for-sale at December 31, 2021 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because the issuers of the securities may have the right to call or prepay obligations with or without penalties (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ Amortized Cost Fair Value Maturing within one year ​ $ 3,513 ​ $ 3,547 Maturing after one year through five years ​ ​ 26,422 ​ ​ 26,718 Maturing after five years through ten years ​ ​ 36,840 ​ ​ 38,314 Maturing after ten years ​ ​ 253,936 ​ ​ 265,792 Securities not due at a single maturity date: ​ ​ 320,711 ​ ​ 334,371 Mortgage-backed securities ​ ​ 303,912 ​ ​ 306,727 Collateralized loan obligations ​ ​ 332,836 ​ ​ 332,216 ​ ​ $ 957,459 ​ $ 973,314 ​ Securities available-for-sale with amortized costs totaling $166.3 million and estimated fair values totaling $167.2 million were pledged to secure other contractual obligations and short-term borrowing arrangements at December 31, 2021 (see Note 10). Securities available-for-sale with amortized costs totaling $224.1 million and estimated fair values totaling $232.0 million were pledged to secure other contractual obligations and short-term borrowing arrangements at December 31, 2020 (see Note 10). At December 31, 2021, the Company’s investment portfolio included securities issued by 335 different government municipalities and agencies located within 33 states with a fair value of $304.3 million. The largest exposure to any single municipality or agency was $4.0 million (fair value) in three bonds issued for the purpose of paying costs to acquire and construct improvements of various township facilities by the Charter Township of Washington, to be repaid by future tax revenues. The Company’s investments in bonds issued by states, municipalities and political subdivisions are evaluated in accordance with Supervision and Regulation Letter 12-15 (SR 12-15) issued by the Board of Governors of the Federal Reserve System, “Investing in Securities without Reliance on Nationally Recognized Statistical Rating Organization Ratings”, and other regulatory guidance. Credit ratings are considered in our analysis only as a guide to the historical default rate associated with similarly-rated bonds. There have been no significant differences in our internal analyses compared with the ratings assigned by the third party credit rating agencies. The following table summarizes the amortized cost and fair values of general obligation and revenue bonds in the Company’s investment securities portfolio at the indicated dates, identifying the state in which the issuing municipality or agency operates for our largest geographic concentrations (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 General obligation bonds Amortized Cost Fair Value Amortized Cost Fair Value State of Issuance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Texas ​ $ 85,045 ​ $ 89,225 ​ $ 76,794 ​ $ 82,888 California ​ ​ 64,092 ​ ​ 67,066 ​ ​ 31,122 ​ ​ 33,100 Washington ​ ​ 23,858 ​ ​ 24,812 ​ ​ 22,896 ​ ​ 25,072 Other (26 and 21 states, respectively) ​ ​ 75,037 ​ ​ 78,579 ​ ​ 51,827 ​ ​ 55,352 Total general obligation bonds ​ ​ 248,032 ​ ​ 259,682 ​ ​ 182,639 ​ ​ 196,412 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue bonds ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ State of Issuance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Texas ​ ​ 7,038 ​ ​ 7,377 ​ ​ 7,023 ​ ​ 7,516 California ​ ​ 1,349 ​ ​ 1,392 ​ ​ 363 ​ ​ 379 Washington ​ ​ 4,334 ​ ​ 4,602 ​ ​ 2,249 ​ ​ 2,406 Other (15 and 14 states, respectively) ​ ​ 29,976 ​ ​ 31,215 ​ ​ 19,737 ​ ​ 21,026 Total revenue bonds ​ ​ 42,697 ​ ​ 44,586 ​ ​ 29,372 ​ ​ 31,327 Total obligations of states and political subdivisions ​ $ 290,729 ​ $ 304,268 ​ $ 212,011 ​ $ 227,739 ​ The following table summarizes the amortized cost and fair value of revenue bonds in the Company’s investment securities portfolio at the indicated dates, identifying the revenue source of repayment for our largest source concentrations (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 Revenue bonds Amortized Cost Fair Value Amortized Cost Fair Value Revenue Source: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Water ​ $ 15,534 ​ $ 16,220 ​ $ 12,609 ​ $ 13,526 Lease ​ ​ 6,556 ​ ​ 6,718 ​ ​ 2,707 ​ ​ 2,773 Sales tax ​ ​ 5,514 ​ ​ 5,842 ​ ​ 3,083 ​ ​ 3,308 Sewer ​ ​ 3,932 ​ ​ 4,165 ​ ​ 4,584 ​ ​ 4,891 Other (9 and 8 sources, respectively) ​ ​ 11,161 ​ ​ 11,641 ​ ​ 6,389 ​ ​ 6,829 Total revenue bonds ​ $ 42,697 ​ $ 44,586 ​ $ 29,372 ​ $ 31,327 ​ ​ ​

Loans and Leases

Loans and Leases	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Loans and Leases	4. LOANS AND LEASES The composition of the loan and lease portfolio is as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Real estate: ​ ​ ​ ​ ​ ​ Secured by commercial and professional office properties, including construction and development ​ $ 1,242,633 ​ $ 1,477,677 Secured by residential properties ​ ​ 390,872 ​ ​ 288,341 Secured by farmland ​ ​ 106,706 ​ ​ 129,905 Total real estate loans ​ ​ 1,740,211 ​ ​ 1,895,923 Agricultural ​ ​ 33,990 ​ ​ 44,872 Commercial and industrial ​ ​ 109,791 ​ ​ 209,048 Mortgage warehouse lines ​ ​ 101,184 ​ ​ 307,679 Consumer ​ ​ 4,550 ​ ​ 5,589 Total loans ​ ​ 1,989,726 ​ ​ 2,463,111 Deferred loan and lease origination cost, net ​ ​ (1,865) ​ ​ (3,147) Allowance for loan and lease losses ​ ​ (14,256) ​ ​ (17,738) Loans, net ​ $ 1,973,605 ​ $ 2,442,226 ​ The Company monitors the credit quality of loans on a continuous basis using the regulatory and accounting classifications of pass, special mention, substandard and impaired to characterize and qualify the associated credit risk. Loans classified as “loss” are immediately charged-off. The Company uses the following definitions of risk classifications: Pass Special Mention – Substandard – Impaired – Credit quality classifications as of December 31, 2021 were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Special Mention Substandard Impaired Total Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ 19,669 ​ $ 1,700 ​ $ — ​ $ — ​ $ 21,369 Other construction/land ​ ​ 24,958 ​ ​ — ​ ​ — ​ ​ 341 ​ ​ 25,299 1-4 family - closed-end ​ ​ 282,717 ​ ​ 4,703 ​ ​ 201 ​ ​ 1,836 ​ ​ 289,457 Equity lines ​ ​ 23,277 ​ ​ 615 ​ ​ 55 ​ ​ 2,641 ​ ​ 26,588 Multi-family residential ​ ​ 49,986 ​ ​ 3,472 ​ ​ — ​ ​ — ​ ​ 53,458 Commercial real estate owner occupied ​ ​ 321,996 ​ ​ 6,108 ​ ​ 3,860 ​ ​ 2,482 ​ ​ 334,446 Commercial real estate non-owner occupied ​ ​ 841,728 ​ ​ 26,364 ​ ​ 14,429 ​ ​ 367 ​ ​ 882,888 Farmland ​ ​ 92,479 ​ ​ 10,266 ​ ​ 3,961 ​ ​ — ​ ​ 106,706 Total real estate ​ ​ 1,656,810 ​ ​ 53,228 ​ ​ 22,506 ​ ​ 7,667 ​ ​ 1,740,211 Agricultural ​ ​ 32,513 ​ ​ — ​ ​ 1,099 ​ ​ 378 ​ ​ 33,990 Commercial and industrial ​ ​ 98,367 ​ ​ 9,989 ​ ​ 212 ​ ​ 1,223 ​ ​ 109,791 Mortgage warehouse lines ​ ​ 101,184 ​ ​ — ​ ​ — ​ ​ — ​ ​ 101,184 Consumer loans ​ ​ 4,349 ​ ​ 31 ​ ​ 6 ​ ​ 164 ​ ​ 4,550 Total gross loans and leases ​ $ 1,893,223 ​ $ 63,248 ​ $ 23,823 ​ $ 9,432 ​ $ 1,989,726 ​ Credit quality classifications as of December 31, 2020 were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Special Mention Substandard Impaired Total Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ 40,044 ​ $ 8,521 ​ $ — ​ $ — ​ $ 48,565 Other construction/land ​ ​ 61,809 ​ ​ 7,478 ​ ​ 2,148 ​ ​ 545 ​ ​ 71,980 1-4 family - closed-end ​ ​ 130,559 ​ ​ 4,922 ​ ​ 1,356 ​ ​ 2,999 ​ ​ 139,836 Equity lines ​ ​ 30,479 ​ ​ 2,581 ​ ​ 58 ​ ​ 4,957 ​ ​ 38,075 Multi-family residential ​ ​ 57,934 ​ ​ 3,597 ​ ​ — ​ ​ 334 ​ ​ 61,865 Commercial real estate owner occupied ​ ​ 308,819 ​ ​ 21,148 ​ ​ 5,652 ​ ​ 7,580 ​ ​ 343,199 Commercial real estate non-owner occupied ​ ​ 1,026,041 ​ ​ 10,827 ​ ​ 25,048 ​ ​ 582 ​ ​ 1,062,498 Farmland ​ ​ 104,826 ​ ​ 21,468 ​ ​ 3,169 ​ ​ 442 ​ ​ 129,905 Total real estate ​ ​ 1,760,511 ​ ​ 80,542 ​ ​ 37,431 ​ ​ 17,439 ​ ​ 1,895,923 Agricultural ​ ​ 39,391 ​ ​ 3,617 ​ ​ 1,614 ​ ​ 250 ​ ​ 44,872 Commercial and industrial ​ ​ 194,876 ​ ​ 11,819 ​ ​ 1,259 ​ ​ 1,094 ​ ​ 209,048 Mortgage warehouse lines ​ ​ 307,679 ​ ​ — ​ ​ — ​ ​ — ​ ​ 307,679 Consumer loans ​ ​ 5,323 ​ ​ 58 ​ ​ 11 ​ ​ 197 ​ ​ 5,589 Total gross loans and leases ​ $ 2,307,780 ​ $ 96,036 ​ $ 40,315 ​ $ 18,980 ​ $ 2,463,111 ​ Loans may or may not be collateralized, and collection efforts are continuously pursued. Loans or leases may be restructured by management when a borrower has experienced some change in financial status causing an inability to meet the original repayment terms and where the Company believes the borrower will eventually overcome those circumstances and make full restitution. Loans and leases are charged off when they are deemed to be uncollectible, while recoveries are generally recorded only when cash payments are received subsequent to the charge-off. The following tables present the activity in the allowance for loan and lease losses and the recorded investment in loans and impairment method by portfolio segment for each of the years ending December 31, 2021, 2020, and 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate Agricultural Industrial (1) Consumer Unallocated Total Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, December 31, 2018 ​ $ 5,831 ​ ​ 256 ​ ​ 2,394 ​ ​ 1,239 ​ ​ 30 ​ ​ 9,750 Charge-offs ​ ​ (1,190) ​ ​ — ​ ​ (1,274) ​ ​ (2,409) ​ ​ — ​ ​ (4,873) Recoveries ​ ​ 647 ​ ​ — ​ ​ 690 ​ ​ 1,159 ​ ​ — ​ ​ 2,496 Provision ​ ​ 347 ​ ​ (63) ​ ​ 875 ​ ​ 1,289 ​ ​ 102 ​ ​ 2,550 Balance, December 31, 2019 ​ ​ 5,635 ​ ​ 193 ​ ​ 2,685 ​ ​ 1,278 ​ ​ 132 ​ ​ 9,923 Charge-offs ​ ​ — ​ ​ — ​ ​ (436) ​ ​ (1,397) ​ ​ — ​ ​ (1,833) Recoveries ​ ​ 87 ​ ​ — ​ ​ 129 ​ ​ 882 ​ ​ — ​ ​ 1,098 Provision ​ ​ 6,044 ​ ​ 289 ​ ​ 2,343 ​ ​ (43) ​ ​ (83) ​ ​ 8,550 Balance, December 31, 2020 ​ ​ 11,766 ​ ​ 482 ​ ​ 4,721 ​ ​ 720 ​ ​ 49 ​ ​ 17,738 Charge-offs ​ ​ (245) ​ ​ (50) ​ ​ (159) ​ ​ (946) ​ ​ — ​ ​ (1,400) Recoveries ​ ​ 601 ​ ​ — ​ ​ 223 ​ ​ 744 ​ ​ — ​ ​ 1,568 Benefit ​ ​ (536) ​ ​ 32 ​ ​ (3,226) ​ ​ (8) ​ ​ 88 ​ ​ (3,650) Balance, December 31, 2021 ​ $ 11,586 ​ $ 464 ​ $ 1,559 ​ $ 510 ​ $ 137 ​ $ 14,256 (1) Includes mortgage warehouse lines ​ Loans evaluated for impairment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 December 31, 2019 ​ Individually Collectively Individually Collectively Individually Collectively Real estate ​ $ 7,667 ​ $ 1,732,544 ​ $ 17,439 ​ $ 1,878,484 ​ $ 12,745 ​ $ 1,389,368 Agricultural ​ ​ 378 ​ ​ 33,612 ​ ​ 250 ​ ​ 44,622 ​ ​ 5 ​ ​ 48,031 Commercial and industrial (1) ​ ​ 1,223 ​ ​ 209,752 ​ ​ 1,094 ​ ​ 515,633 ​ ​ 977 ​ ​ 303,658 Consumer ​ ​ 164 ​ ​ 4,386 ​ ​ 197 ​ ​ 5,392 ​ ​ 426 ​ ​ 7,355 Total loans ​ $ 9,432 ​ $ 1,980,294 ​ $ 18,980 ​ $ 2,444,131 ​ $ 14,153 ​ $ 1,748,412 (1) Includes mortgage warehouse lines ​ Reserves based on method of evaluation for impairment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 ​ December 31, 2019 ​ Specific General Specific General Specific General Real estate ​ $ 428 ​ $ 10,983 ​ $ 525 ​ $ 11,241 ​ $ 493 ​ $ 5,142 Agricultural ​ ​ 244 ​ ​ 217 ​ ​ 250 ​ ​ 232 ​ ​ 1 ​ ​ 192 Commercial and industrial (1) ​ ​ 127 ​ ​ 1,405 ​ ​ 202 ​ ​ 4,519 ​ ​ 219 ​ ​ 2,466 Consumer ​ ​ 19 ​ ​ 487 ​ ​ 19 ​ ​ 701 ​ ​ 114 ​ ​ 1,164 Unallocated ​ ​ — ​ ​ 346 ​ ​ — ​ ​ 49 ​ ​ — ​ ​ 132 Total loan loss reserves ​ $ 818 ​ $ 13,438 ​ $ 996 ​ $ 16,742 ​ $ 827 ​ $ 9,096 (1) Includes mortgage warehouse lines The following tables present the recorded investment in nonaccrual loans and loans past due over 30 days as of December 31, 2021 and December 31, 2020 (dollars in thousands, except footnotes): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ 30-59 Days ​ 60-89 Days ​ 90 Days Or More Past ​ ​ ​ ​ ​ ​ ​ Total Financing ​ Non-Accrual ​ Past Due Past Due Due (2) Total Past Due Current Receivables Loans (1) Real Estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 21,369 ​ $ 21,369 ​ $ — Other construction/land ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 25,299 ​ ​ 25,299 ​ ​ — 1-4 family - closed-end ​ ​ 1,532 ​ ​ 132 ​ ​ — ​ ​ 1,664 ​ ​ 287,793 ​ ​ 289,457 ​ ​ 1,023 Equity lines ​ ​ 30 ​ ​ — ​ ​ — ​ ​ 30 ​ ​ 26,558 ​ ​ 26,588 ​ ​ 892 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 53,458 ​ ​ 53,458 ​ ​ — Commercial real estate owner occupied ​ ​ 124 ​ ​ — ​ ​ 698 ​ ​ 822 ​ ​ 333,624 ​ ​ 334,446 ​ ​ 1,234 Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 882,888 ​ ​ 882,888 ​ ​ — Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 106,706 ​ ​ 106,706 ​ ​ — Total real estate loans ​ ​ 1,686 ​ ​ 132 ​ ​ 698 ​ ​ 2,516 ​ ​ 1,737,695 ​ ​ 1,740,211 ​ ​ 3,149 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ 284 ​ ​ 284 ​ ​ 33,706 ​ ​ 33,990 ​ ​ 378 Commercial and industrial ​ ​ 473 ​ ​ — ​ ​ 283 ​ ​ 756 ​ ​ 109,035 ​ ​ 109,791 ​ ​ 973 Mortgage warehouse lines ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 101,184 ​ ​ 101,184 ​ ​ — Consumer loans ​ ​ 6 ​ ​ 3 ​ ​ — ​ ​ 9 ​ ​ 4,541 ​ ​ 4,550 ​ ​ 22 Total gross loans and leases ​ $ 2,165 ​ $ 135 ​ $ 1,265 ​ $ 3,565 ​ $ 1,986,161 ​ $ 1,989,726 ​ $ 4,522 (1) Included in Total Financing Receivables (2) As of December 31, 2021 there were no loans over 90 days past due and still accruing. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ 30-59 Days ​ 60-89 Days ​ 90 Days Or More Past ​ ​ ​ ​ ​ ​ ​ Total Financing ​ Non-Accrual ​ Past Due Past Due Due (2) Total Past Due Current Receivables Loans (1) Real Estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 48,565 ​ $ 48,565 ​ $ — Other construction/land ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 71,980 ​ ​ 71,980 ​ ​ — 1-4 family - closed-end ​ ​ 210 ​ ​ 37 ​ ​ 150 ​ ​ 397 ​ ​ 139,439 ​ ​ 139,836 ​ ​ 1,193 Equity lines ​ ​ 1,409 ​ ​ — ​ ​ 551 ​ ​ 1,960 ​ ​ 36,115 ​ ​ 38,075 ​ ​ 2,403 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 61,865 ​ ​ 61,865 ​ ​ — Commercial real estate owner occupied ​ ​ 101 ​ ​ 1,187 ​ ​ 78 ​ ​ 1,366 ​ ​ 341,833 ​ ​ 343,199 ​ ​ 1,678 Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ 152 ​ ​ 152 ​ ​ 1,062,346 ​ ​ 1,062,498 ​ ​ 582 Farmland ​ ​ — ​ ​ 211 ​ ​ 442 ​ ​ 653 ​ ​ 129,252 ​ ​ 129,905 ​ ​ 442 Total real estate loans ​ ​ 1,720 ​ ​ 1,435 ​ ​ 1,373 ​ ​ 4,528 ​ ​ 1,891,395 ​ ​ 1,895,923 ​ ​ 6,298 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ 250 ​ ​ 250 ​ ​ 44,622 ​ ​ 44,872 ​ ​ 250 Commercial and industrial ​ ​ 325 ​ ​ — ​ ​ 237 ​ ​ 562 ​ ​ 208,486 ​ ​ 209,048 ​ ​ 1,026 Mortgage warehouse lines ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 307,679 ​ ​ 307,679 ​ ​ — Consumer loans ​ ​ 38 ​ ​ — ​ ​ — ​ ​ 38 ​ ​ 5,551 ​ ​ 5,589 ​ ​ 24 Total gross loans and leases ​ $ 2,083 ​ $ 1,435 ​ $ 1,860 ​ $ 5,378 ​ $ 2,457,733 ​ $ 2,463,111 ​ $ 7,598 (1) Included in Total Financing Receivables (2) As of December 31, 2020 there were no loans over 90 days past due and still accruing. Generally, the Company places a loan or lease on nonaccrual status and ceases recognizing interest income when it has become delinquent more than 90 days and/or when Management determines that the repayment of principal and collection of interest is unlikely. The Company may decide that it is appropriate to continue to accrue interest on certain loans more than 90 days delinquent if they are well-secured by collateral and collection is in process. When a loan is placed on nonaccrual status, any accrued but uncollected interest for the loan is reversed out of interest income in the period in which the loan’s status changed. Subsequent payments received from the customer are applied to principal, and no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required. As of December 31, 2021 there was 1 customer relationship, for a total of $10.4 million, with payment deferrals either under section 4013 of the CARES Act or the April 7, 2020 Interagency Statement, that are not included in the table above. Individually impaired loans as of December 31, 2021, December 31, 2020 and December 31, 2019 were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ Unpaid Principal ​ Recorded ​ ​ ​ Average Recorded ​ Interest Income ​ Balance (1) Investment (2) Related Allowance Investment Recognized (3) With an Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ 341 ​ $ 341 ​ $ 64 ​ $ 352 ​ $ 55 1-4 family - closed-end ​ ​ 1,048 ​ ​ 1,048 ​ ​ 37 ​ ​ 1,096 ​ ​ 104 Equity lines ​ ​ 2,005 ​ ​ 1,993 ​ ​ 182 ​ ​ 2,056 ​ ​ 138 Commercial real estate - owner occupied ​ ​ 1,249 ​ ​ 1,248 ​ ​ 19 ​ ​ 1,278 ​ ​ 144 Commercial real estate - non-owner occupied ​ ​ 367 ​ ​ 367 ​ ​ 126 ​ ​ 393 ​ ​ 32 Total real estate ​ ​ 5,010 ​ ​ 4,997 ​ ​ 428 ​ ​ 5,175 ​ ​ 473 Agricultural ​ ​ 244 ​ ​ 244 ​ ​ 244 ​ ​ 246 ​ ​ — Commercial and industrial ​ ​ 757 ​ ​ 757 ​ ​ 127 ​ ​ 873 ​ ​ 41 Consumer loans ​ ​ 164 ​ ​ 164 ​ ​ 19 ​ ​ 180 ​ ​ 28 ​ ​ ​ 6,175 ​ ​ 6,162 ​ ​ 818 ​ ​ 6,474 ​ ​ 542 With no Related Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family - closed-end ​ ​ 788 ​ ​ 788 ​ ​ — ​ ​ 869 ​ ​ — Equity lines ​ ​ 648 ​ ​ 648 ​ ​ — ​ ​ 690 ​ ​ 6 Commercial real estate - owner occupied ​ ​ 1,353 ​ ​ 1,234 ​ ​ — ​ ​ 1,282 ​ ​ — Total real estate ​ ​ 2,789 ​ ​ 2,670 ​ ​ — ​ ​ 2,841 ​ ​ 6 Agricultural ​ ​ 134 ​ ​ 134 ​ ​ — ​ ​ 186 ​ ​ — Commercial and industrial ​ ​ 466 ​ ​ 466 ​ ​ — ​ ​ 550 ​ ​ — ​ ​ ​ 3,389 ​ ​ 3,270 ​ ​ — ​ ​ 3,577 ​ ​ 6 Total ​ $ 9,564 ​ $ 9,432 ​ $ 818 ​ $ 10,051 ​ $ 548 (1) Contractual principal balance due from customer. (2) Principal balance on Company’s books, less any direct charge offs. (3) Interest income is recognized on performing balances on a regular accrual basis. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Unpaid Principal ​ Recorded ​ ​ ​ Average Recorded ​ Interest Income ​ Balance (1) Investment (2) Related Allowance Investment Recognized (3) With an Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ 545 ​ $ 545 ​ $ 171 ​ $ 565 ​ $ 40 1-4 family - closed-end ​ ​ 2,078 ​ ​ 2,077 ​ ​ 51 ​ ​ 2,141 ​ ​ 104 Equity lines ​ ​ 2,875 ​ ​ 2,875 ​ ​ 233 ​ ​ 2,989 ​ ​ 98 Multifamily residential ​ ​ 334 ​ ​ 334 ​ ​ 16 ​ ​ 343 ​ ​ 23 Commercial real estate- owner occupied ​ ​ 6,076 ​ ​ 6,076 ​ ​ 54 ​ ​ 6,135 ​ ​ 226 Total real estate ​ ​ 11,908 ​ ​ 11,907 ​ ​ 525 ​ ​ 12,173 ​ ​ 491 Agricultural ​ ​ 250 ​ ​ 250 ​ ​ 250 ​ ​ 250 ​ ​ — Commercial and industrial ​ ​ 945 ​ ​ 935 ​ ​ 202 ​ ​ 1,152 ​ ​ 6 Consumer loans ​ ​ 235 ​ ​ 197 ​ ​ 19 ​ ​ 221 ​ ​ 16 ​ ​ ​ 13,338 ​ ​ 13,289 ​ ​ 996 ​ ​ 13,796 ​ ​ 513 With no Related Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ ​ 114 ​ ​ — ​ ​ — ​ ​ 5 ​ ​ — 1-4 family - closed-end ​ ​ 942 ​ ​ 922 ​ ​ — ​ ​ 960 ​ ​ — Equity Lines ​ ​ 2,160 ​ ​ 2,082 ​ ​ — ​ ​ 2,127 ​ ​ 3 Commercial real estate- owner occupied ​ ​ 1,624 ​ ​ 1,504 ​ ​ — ​ ​ 1,590 ​ ​ — Commercial real estate- non-owner occupied ​ ​ 582 ​ ​ 582 ​ ​ — ​ ​ 617 ​ ​ — Farmland ​ ​ 442 ​ ​ 442 ​ ​ — ​ ​ 446 ​ ​ — Total real estate ​ ​ 5,864 ​ ​ 5,532 ​ ​ — ​ ​ 5,745 ​ ​ 3 Commercial and industrial ​ ​ 189 ​ ​ 159 ​ ​ — ​ ​ 165 ​ ​ — Consumer loans ​ ​ 5 ​ ​ — ​ ​ — ​ ​ 5 ​ ​ 2 ​ ​ ​ 6,058 ​ ​ 5,691 ​ ​ — ​ ​ 5,915 ​ ​ 5 Total ​ $ 19,396 ​ $ 18,980 ​ $ 996 ​ $ 19,711 ​ $ 518 (1) Contractual principal balance due from customer. (2) Principal balance on Company’s books, less any direct charge offs. (3) Interest income is recognized on performing balances on a regular accrual basis. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid Principal ​ Recorded ​ ​ ​ Average Recorded ​ Interest Income ​ Balance (1) Investment (2) Related Allowance Investment Recognized (3) With an Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ 656 ​ $ 537 ​ $ 157 ​ $ 563 ​ $ 32 1-4 family - closed-end ​ ​ 2,298 ​ ​ 2,298 ​ ​ 58 ​ ​ 2,365 ​ ​ 146 Equity lines ​ ​ 4,173 ​ ​ 4,120 ​ ​ 252 ​ ​ 4,185 ​ ​ 200 Multifamily residential ​ ​ 353 ​ ​ 353 ​ ​ 17 ​ ​ 361 ​ ​ 23 Commercial real estate- owner occupied ​ ​ 593 ​ ​ 593 ​ ​ 6 ​ ​ 606 ​ ​ 38 Farmland ​ ​ 237 ​ ​ 237 ​ ​ 3 ​ ​ 256 ​ ​ — Total real estate ​ ​ 8,310 ​ ​ 8,138 ​ ​ 493 ​ ​ 8,336 ​ ​ 439 Agricultural ​ ​ 5 ​ ​ 5 ​ ​ 1 ​ ​ 6 ​ ​ — Commercial and industrial ​ ​ 915 ​ ​ 896 ​ ​ 219 ​ ​ 1,140 ​ ​ 29 Consumer loans ​ ​ 464 ​ ​ 426 ​ ​ 114 ​ ​ 469 ​ ​ 35 ​ ​ ​ 9,694 ​ ​ 9,465 ​ ​ 827 ​ ​ 9,951 ​ ​ 503 With no Related Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ ​ 52 ​ ​ 17 ​ ​ — ​ ​ 577 ​ ​ 4 1-4 family - closed-end ​ ​ 755 ​ ​ 722 ​ ​ — ​ ​ 726 ​ ​ — Equity Lines ​ ​ 326 ​ ​ 301 ​ ​ — ​ ​ 310 ​ ​ 5 Commercial real estate- owner occupied ​ ​ 1,560 ​ ​ 1,440 ​ ​ — ​ ​ 1,477 ​ ​ — Commercial real estate- non-owner occupied ​ ​ 3,295 ​ ​ 2,105 ​ ​ — ​ ​ 3,267 ​ ​ — Farmland ​ ​ 22 ​ ​ 22 ​ ​ — ​ ​ 25 ​ ​ — Total real estate ​ ​ 6,010 ​ ​ 4,607 ​ ​ — ​ ​ 6,382 ​ ​ 9 Commercial and industrial ​ ​ 102 ​ ​ 81 ​ ​ — ​ ​ 162 ​ ​ — Consumer loans ​ ​ 9 ​ ​ — ​ ​ — ​ ​ 140 ​ ​ 15 ​ ​ ​ 6,121 ​ ​ 4,688 ​ ​ — ​ ​ 6,684 ​ ​ 24 Total ​ $ 15,815 ​ $ 14,153 ​ $ 827 ​ $ 16,635 ​ $ 527 ​ (1) Contractual principal balance due from customer. (2) Principal balance on Company’s books, less any direct charge offs. (3) Interest income is recognized on performing balances on a regular accrual basis. ​ Included in loans above are troubled debt restructurings that were classified as impaired. The Company had $0.4 million and $0.4 million in commercial loans, $0.1 million and $0 in agricultural loans, $5.4 million and $13.0 million in real estate secured loans and $0.2 million and $0.2 million in consumer loans, which were modified as troubled debt restructurings and consequently classified as impaired at December 31, 2021 and 2020, respectively. Additional commitments to existing customers with restructured loans totaled $0.04 million and $0.05 million at December 31, 2021 and 2020, respectively. Interest income recognized on impaired loans was $0.5 million, $0.5 million, and $0.5 million, for the years ended December 31, 2021, 2020, and 2019, respectively. There was no interest income recognized on a cash basis on impaired loans for the years ended December 31, 2021, 2020, and 2019, respectively. The following is a summary of interest income from non-accrual loans in the portfolio at year-end that was not recognized (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, Non-accrual loans 2021 2020 2019 Interest that would have been recorded under the loans’ original terms ​ $ 406 ​ $ 605 ​ $ 650 Less gross interest recorded ​ ​ 33 ​ ​ 201 ​ ​ 289 Foregone interest ​ $ 373 ​ $ 404 ​ $ 361 ​ Certain loans have been pledged to secure short-term borrowing arrangements (see Note 10). These loans totaled $808.8 million and $1.1 billion at December 31, 2021 and 2020, respectively. Salaries and employee benefits totaling $1.0 million, $3.3 million, and $3.7 million, have been deferred as loan and lease origination costs to be amortized over the estimated lives of the related loans and leases for the years ended December 31, 2021, 2020, and 2019, respectively. During the periods ended December 31, 2021 and 2020, the terms of certain loans were modified as troubled debt restructurings. Types of modifications applied to these loans include a reduction of the stated interest rate, a modification of term, an agreement to collect only interest rather than principal and interest for a specified period, or any combination thereof. The following tables present troubled debt restructurings by type of modification during the period ending December 31, 2021, December 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ Rate ​ Term ​ Interest Only ​ Rate & Term ​ ​ Term & Interest ​ ​ ​ ​ Modification Modification Modification Modification ​ Modification ​ Total Troubled debt restructurings ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — Other construction/land ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 1-4 family - closed-end ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ ​ — ​ ​ 1,000 ​ ​ — ​ ​ 83 ​ ​ — ​ ​ 1,083 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate owner occupied ​ ​ — ​ ​ 136 ​ ​ — ​ ​ — ​ ​ — ​ ​ 136 Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ — ​ ​ 1,136 ​ ​ — ​ ​ 83 ​ ​ — ​ ​ 1,219 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ 118 ​ ​ — ​ ​ — ​ ​ — ​ ​ 118 Commercial and industrial ​ ​ — ​ ​ 185 ​ ​ — ​ ​ — ​ ​ — ​ ​ 185 Consumer loans ​ ​ — ​ ​ 44 ​ ​ — ​ ​ — ​ ​ 23 ​ ​ 67 Small Business Administration Loans ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ $ — ​ $ 1,483 ​ $ — ​ $ 83 ​ $ 23 ​ $ 1,589 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Rate ​ Term ​ Interest Only ​ Rate & Term ​ ​ Term & Interest ​ ​ ​ ​ Modification Modification Modification Modification ​ Modification ​ Total Troubled debt restructurings ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ — ​ $ 85 ​ $ — ​ $ — ​ $ — ​ $ 85 1-4 family - closed-end ​ ​ — ​ ​ 1,325 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,325 Equity lines ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate owner occupied ​ ​ — ​ ​ 5,515 ​ ​ — ​ ​ — ​ ​ 338 ​ ​ 5,853 Commercial real estate non-owner occupied ​ ​ — ​ ​ 443 ​ ​ — ​ ​ — ​ ​ — ​ ​ 443 Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ — ​ ​ 7,368 ​ ​ — ​ ​ — ​ ​ 338 ​ ​ 7,706 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ ​ — ​ ​ 143 ​ ​ — ​ ​ — ​ ​ — ​ ​ 143 Consumer loans ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ $ — ​ $ 7,511 ​ $ — ​ $ — ​ $ 338 ​ $ 7,849 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Rate ​ Term ​ Interest Only ​ Rate & Term ​ ​ Term & Interest ​ ​ ​ ​ Modification Modification Modification Modification ​ Modification ​ Total Troubled debt restructurings ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ — ​ $ 163 ​ $ — ​ $ — ​ $ — ​ $ 163 1-4 family - closed-end ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ ​ — ​ ​ 344 ​ ​ — ​ ​ — ​ ​ — ​ ​ 344 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ — ​ ​ 507 ​ ​ — ​ ​ — ​ ​ — ​ ​ 507 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ ​ 94 ​ ​ 255 ​ ​ — ​ ​ 52 ​ ​ — ​ ​ 401 Consumer loans ​ ​ — ​ ​ 9 ​ ​ — ​ ​ 50 ​ ​ — ​ ​ 59 ​ ​ $ 94 ​ $ 771 ​ $ — ​ $ 102 ​ $ — ​ $ 967 ​ The following tables present loans by class modified as troubled debt restructurings including any subsequent defaults during the period ending December 31, 2021, December 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Outstanding ​ ​ ​ ​ ​ Number of ​ Recorded ​ Recorded ​ Reserve December 31, 2021 Loans Investment Investment Difference (1) Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ — ​ $ — ​ $ — ​ $ — Other construction/land ​ — ​ ​ — ​ ​ — ​ ​ — 1-4 family - closed-end ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ 2 ​ ​ 1,083 ​ ​ 1,083 ​ ​ — Multi-family residential ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - owner occupied ​ 1 ​ ​ 137 ​ ​ 136 ​ ​ (1) Commercial real estate - non-owner occupied ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ ​ ​ 1,220 ​ ​ 1,219 ​ ​ (1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ 1 ​ ​ 118 ​ ​ 118 ​ ​ 116 Commercial and industrial ​ 1 ​ ​ 185 ​ ​ 185 ​ ​ (1) Consumer loans ​ 3 ​ ​ 67 ​ ​ 67 ​ ​ 2 Small Business Administration Loans ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ ​ ​ $ 1,590 ​ $ 1,589 ​ $ 116 (1) This represents the increase or (decrease) in the allowance for loans and lease losses reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan and lease loss methodology. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Outstanding ​ ​ ​ ​ ​ Number of ​ Recorded ​ Recorded ​ Reserve December 31, 2020 Loans Investment Investment Difference (1) Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ 1 ​ $ 86 ​ $ 85 ​ $ 40 1-4 family - closed-end ​ 1 ​ ​ 1,325 ​ ​ 1,325 ​ ​ 10 Equity lines ​ — ​ ​ — ​ ​ — ​ ​ — Multi-family residential ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - owner occupied ​ 4 ​ ​ 5,853 ​ ​ 5,853 ​ ​ 8 Commercial real estate - non-owner occupied ​ 1 ​ ​ 443 ​ ​ 443 ​ ​ — Farmland ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ ​ ​ 7,707 ​ ​ 7,706 ​ ​ 58 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ 3 ​ ​ 143 ​ ​ 143 ​ ​ 3 Consumer loans ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ ​ ​ $ 7,850 ​ $ 7,849 ​ $ 61 (1) This represents the increase or (decrease) in the allowance for loans and lease losses reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan and lease loss methodology. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Outstanding ​ ​ ​ ​ ​ Number of ​ Recorded ​ Recorded ​ Reserve December 31, 2019 Loans Investment Investment Difference (1) Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ 1 ​ $ 163 ​ $ 163 ​ $ 74 1-4 family - closed-end ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ 2 ​ ​ 344 ​ ​ 344 ​ ​ — Multi-family residential ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - owner occupied ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - non-owner occupied ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ ​ ​ 507 ​ ​ 507 ​ ​ 74 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ 7 ​ ​ 401 ​ ​ 401 ​ ​ (59) Consumer loans ​ 2 ​ ​ 59 ​ ​ 59 ​ ​ (47) ​ ​ ​ ​ $ 967 ​ $ 967 ​ $ (32) (1) This represents the increase or (decrease) in the allowance for loans and lease losses reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan and lease loss methodology. ​ In the tables above, there were no TDRs that subsequently defaulted necessitating an increase in the allowance for loan and lease losses for the years ended December 31, 2021, 2020 and 2019. The total allowance for loan and lease losses specifically allocated to the balances that were classified as TDRs during the year ended December 31, 2021 and 2020 is $0.5 million and $0.6 million, respectively. Purchased Credit Impaired Loans The Company has purchased loans from past acquisitions, some of which have shown evidence of credit deterioration since origination and it was probable at acquisition that all contractually required payments would not be collected. The carrying amount and unpaid principal balance of those loans are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ Unpaid Principal Balance Carrying Value Real estate secured ​ $ 60 ​ $ 60 Total purchased credit impaired loans ​ $ 60 ​ $ 60 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Unpaid Principal Balance Carrying Value Real estate secured ​ $ 78 ​ $ 78 Total purchased credit impaired loans ​ $ 78 ​ $ 78 ​ For those purchased credit impaired loans disclosed above, the Company did not increase the allowance for loan and lease losses during 2021, 2020 and 2019. There is no accretable yield, or income expected to be collected on these purchased credit impaired loans. During the years ended December 31, 2021 and 2020, there were no purchased credit impaired loans acquired.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Premises and Equipment	5. PREMISES AND EQUIPMENT Premises and equipment at cost consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Land ​ $ 4,823 ​ $ 5,751 Buildings and improvements ​ ​ 21,006 ​ ​ 21,580 Furniture, fixtures and equipment ​ ​ 19,242 ​ ​ 20,705 Leasehold improvements ​ ​ 14,682 ​ ​ 15,226 ​ ​ ​ 59,753 ​ ​ 63,262 ​ ​ ​ ​ ​ ​ ​ Less accumulated depreciation and amortization ​ ​ 36,182 ​ ​ 35,757 ​ ​ $ 23,571 ​ $ 27,505 ​ Depreciation and amortization included in occupancy and equipment expense totaled $3.1 million, $2.8 million, and $2.8 million, for the years ended December 31, 2021, 2020, and 2019, respectively.

Operating Leases

Operating Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Operating Leases	6. OPERATING LEASES recognized lease expense of $2.2 million for the years ended December 31, 2021, 2020 and 2019. Most leases include one or more renewal options available to exercise. The exercise of lease renewal options is typically at the Company’s sole discretion; therefore, the majority of renewals to extend the lease terms are not included in our right-of-use assets and lease liabilities as they are not reasonably certain of exercise. We regularly evaluate the renewal options and when they are reasonably certain of exercise, we include the renewal period in our lease term. As most of our leases do not provide an implicit rate, we used our incremental borrowing rate in determining the present value of the lease payments. There were no sale and leaseback transactions, leveraged leases, or lease transactions with related parties during the years ending December 31, 2021 and 2020. At December 31, 2021, the Company’s right-of-use assets and operating lease liabilities were $5.5 million and $6.2 million, respectively. The weighted average remaining lease term for the lease liabilities was 6.3 years, and the weighted average discount rate of remaining payments was 5.3 percent. At December 31, 2020, the Company’s right-of-use assets and operating lease liabilities were $7.2 million and $7.8 million, respectively. The weighted average remaining lease term for the lease liabilities was 6.8 years, and the weighted average discount rate of remaining payments was 5.5 percent for the year ended December 31, 2020. Lease liabilities from new right-of-use assets obtained during the year ending December 31, 2021 and December 31, 2020 were $0.5 million and $0.6 million, respectively. There were no variable lease costs for the years ending December 31, 2021 and 2020. Cash paid on operating leases was $2.2 million for both years ending December 31, 2021 and 2020. Future undiscounted lease payments for operating leases with initial terms of one year or more as of December 31, 2021 are as follows (dollars in thousands): ​ ​ ​ ​ ​ Year Ending December 31, ​ ​ ​ 2022 $ 1,909 2023 ​ ​ 1,403 2024 ​ ​ 1,057 2025 ​ ​ 782 2026 ​ ​ 479 Thereafter ​ ​ 1,722 Total undiscounted lease payments ​ $ 7,352 Less: imputed interest ​ ​ (1,143) Net lease liabilities ​ $ 6,209 ​ The Company generally has options to renew its facilities leases after the initial leases expire. The renewal options range from one

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	7. GOODWILL AND INTANGIBLE ASSETS Goodwill The rollforward of goodwill for each of the preceding three years is included in the table below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2021 2020 2019 Balance at January 1 ​ $ 27,357 ​ $ 27,357 ​ $ 27,357 Acquired goodwill ​ ​ — ​ ​ — ​ ​ — Impairment ​ ​ — ​ ​ — ​ ​ — Balance at December 31 ​ $ 27,357 ​ $ 27,357 ​ $ 27,357 ​ Impairment exists when a reporting unit’s carrying value of goodwill exceeds its fair value. Bank of the Sierra (the “Bank”) is the only subsidiary of the Company that meets the materiality criteria necessary to be deemed an operating segment, and because the Company exists primarily for the purpose of holding the stock of the Bank we have determined that only one unified operating segment or reporting unit (the consolidated Company) exists. The fair value of the consolidated Company is its market capitalization, as determined by quoted prices in active markets. If the Company’s market capitalization exceeds recorded shareholders’ equity, the book value, it can be reasonably presumed that no impairment exists. At December 31, 2021 (the measurement date that the Company selected), the Company’s stock closed at $27.15 which resulted in a market capitalization in excess of shareholders book equity. Therefore it was determined that the fair value of the reporting unit exceeded its carrying value, resulting in no impairment at December 31, 2021. Acquired Intangible Assets Acquired intangible assets were as follows at year-end (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2021 ​ 2020 ​ Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Core deposit intangibles ​ $ 8,401 ​ $ 5,126 ​ $ 8,401 ​ $ 4,094 ​ Aggregate amortization expense was $1.0 million, $1.1 million, and $1.1 million for 2021, 2020, and 2019. Estimated amortization expense for each of the next five years and thereafter (dollars in thousands): ​ ​ ​ ​ 2022 $ 1,000 2023 ​ ​ 876 2024 ​ ​ 781 2025 ​ ​ 566 2026 ​ ​ 52 Thereafter ​ ​ — ​ ​ $ 3,275 ​

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2021
Other Assets [Abstract]
Other Assets	8. OTHER ASSETS Other assets consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Accrued interest receivable ​ $ 11,246 ​ $ 16,074 Deferred tax assets ​ ​ 3,792 ​ ​ 839 Investment in qualified affordable housing projects ​ ​ 2,940 ​ ​ 3,473 Investment in limited partnerships ​ ​ 1,655 ​ ​ 1,848 Federal Home Loan Bank stock, at cost ​ ​ 12,393 ​ ​ 10,727 Other ​ ​ 26,003 ​ ​ 17,485 ​ ​ $ 58,029 ​ $ 50,446 ​ The Company has invested in limited partnerships that operate qualified affordable housing projects to receive tax benefits in the form of tax deductions from operating losses and tax credits. The Company accounts for these investments under the cost method and management analyzes these investments annually for potential impairment. The Company had $0.1 million in remaining capital commitments to these partnerships at December 31, 2021. The Company holds certain equity investments that are not readily marketable securities and thus are classified as “other assets” on the Company’s balance sheet. These include investments in Pacific Coast Bankers Bancshares, California Economic Development Lending Initiative, and the Federal Home Loan Bank (“FHLB”). The largest of these is the Company’s $12.4 million investment in FHLB stock, carried at cost. Quarterly, the FHLB evaluates and adjusts the Company’s minimum stock requirement based on the Company’s borrowing activity and membership requirements. Any stock deemed in excess is automatically repurchased by the FHLB at cost.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Deposits	9. DEPOSITS Time deposits that meet or exceed the FDIC Insurance limit of $250,000 at year-end 2021 and 2020 were $115.2 million and $225.4 million, respectively. ​ Aggregate annual maturities of time deposits were as follows (dollars in thousands): ​ ​ ​ ​ Year Ending December 31, ​ ​ ​ 2022 $ 294,284 2023 ​ ​ 31,227 2024 ​ ​ 26,051 2025 ​ ​ 1,254 2026 ​ ​ 309 Thereafter ​ ​ 772 ​ ​ $ 353,897 ​ Interest expense recognized on interest-bearing deposits consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Interest bearing demand deposits ​ $ 331 ​ $ 278 ​ $ 316 NOW ​ ​ 444 ​ ​ 388 ​ ​ 524 Savings ​ ​ 240 ​ ​ 221 ​ ​ 308 Money market ​ ​ 111 ​ ​ 128 ​ ​ 181 Time deposits ​ ​ 1,039 ​ ​ 2,687 ​ ​ 8,931 Brokered Deposits ​ ​ 225 ​ ​ 246 ​ ​ 1,120 ​ ​ $ 2,390 ​ $ 3,948 ​ $ 11,380 ​

Other Borrowing Arrangements

Other Borrowing Arrangements	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Other Borrowing Arrangements	10. OTHER BORROWING ARRANGEMENTS At year end, short-term borrowings consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ Average balance outstanding Amount Average interest rate during the year Maximum month-end balance during the year Weighted average interest rate at year-end As of December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Repurchase agreements ​ $ 70,443 ​ $ 106,937 ​ 0.30% ​ $ 106,937 ​ 0.30% Short term borrowings ​ ​ 5,186 ​ ​ — ​ 0.06% ​ ​ 5,000 ​ — ​ ​ $ 75,629 ​ $ 106,937 ​ ​ ​ $ 111,937 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ ​ Average balance outstanding Amount Average interest rate during the year Maximum month-end balance during the year Weighted average interest rate at year-end As of December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Repurchase agreements ​ $ 34,614 ​ $ 39,138 ​ 0.40% ​ $ 41,449 ​ 0.40% Short term borrowings ​ ​ 53,593 ​ ​ 142,900 ​ 0.19% ​ ​ 195,100 ​ 0.12% ​ ​ $ 88,207 ​ $ 182,038 ​ ​ ​ $ 236,549 ​ ​ ​ Each FHLB advance is payable at its maturity date, with a prepayment penalty for fixed rate advances. The advances were collateralized by $808.8 million of first mortgage loans under a blanket lien arrangement at year end 2021. Based on this collateral and the Company’s holdings of FHLB stock, the Company was eligible to borrow up to the total of $888.8 million at year-end 2021, with a remaining borrowing capacity of $732.2 million if sufficient additional collateral was pledged. The Company had no borrowings at December 31, 2021 and 2020 from the FRB. The Company was eligible to borrow up to $50.6 million from FRB at year end 2021, which was collateralized by $66.1 million in first mortgage loans under a blanket lien arrangement. The Company had unsecured lines of credit with its correspondent banks which, in the aggregate, amounted to $305.0 million and $275.0 million at December 31, 2021 and 2020, respectively, at interest rates which vary with market conditions. There was no balance outstanding under these lines of credit at December 31, 2021 and $100.0 million outstanding at December 31, 2020. 11. LONG-TERM DEBT At year-end, long-term debt was as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ ​ 2020 ​ ​ ​ Principal ​ ​ Unamortized Debt Issuance Costs ​ ​ Principal ​ ​ Unamortized Debt Issuance Costs Fixed - floating rate subordinated debentures, due 2031 (1) ​ $ 50,000 ​ $ (859) ​ $ — ​ $ — ​ ​ $ 50,000 ​ $ (859) ​ $ — ​ $ — (1) 3.25% fixed rate for five years then floating rate at 253.5 basis points over 3-month term SOFR. ​ ​

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Long-Term Debt	10. OTHER BORROWING ARRANGEMENTS At year end, short-term borrowings consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ Average balance outstanding Amount Average interest rate during the year Maximum month-end balance during the year Weighted average interest rate at year-end As of December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Repurchase agreements ​ $ 70,443 ​ $ 106,937 ​ 0.30% ​ $ 106,937 ​ 0.30% Short term borrowings ​ ​ 5,186 ​ ​ — ​ 0.06% ​ ​ 5,000 ​ — ​ ​ $ 75,629 ​ $ 106,937 ​ ​ ​ $ 111,937 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ ​ Average balance outstanding Amount Average interest rate during the year Maximum month-end balance during the year Weighted average interest rate at year-end As of December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Repurchase agreements ​ $ 34,614 ​ $ 39,138 ​ 0.40% ​ $ 41,449 ​ 0.40% Short term borrowings ​ ​ 53,593 ​ ​ 142,900 ​ 0.19% ​ ​ 195,100 ​ 0.12% ​ ​ $ 88,207 ​ $ 182,038 ​ ​ ​ $ 236,549 ​ ​ ​ Each FHLB advance is payable at its maturity date, with a prepayment penalty for fixed rate advances. The advances were collateralized by $808.8 million of first mortgage loans under a blanket lien arrangement at year end 2021. Based on this collateral and the Company’s holdings of FHLB stock, the Company was eligible to borrow up to the total of $888.8 million at year-end 2021, with a remaining borrowing capacity of $732.2 million if sufficient additional collateral was pledged. The Company had no borrowings at December 31, 2021 and 2020 from the FRB. The Company was eligible to borrow up to $50.6 million from FRB at year end 2021, which was collateralized by $66.1 million in first mortgage loans under a blanket lien arrangement. The Company had unsecured lines of credit with its correspondent banks which, in the aggregate, amounted to $305.0 million and $275.0 million at December 31, 2021 and 2020, respectively, at interest rates which vary with market conditions. There was no balance outstanding under these lines of credit at December 31, 2021 and $100.0 million outstanding at December 31, 2020. 11. LONG-TERM DEBT At year-end, long-term debt was as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ ​ 2020 ​ ​ ​ Principal ​ ​ Unamortized Debt Issuance Costs ​ ​ Principal ​ ​ Unamortized Debt Issuance Costs Fixed - floating rate subordinated debentures, due 2031 (1) ​ $ 50,000 ​ $ (859) ​ $ — ​ $ — ​ ​ $ 50,000 ​ $ (859) ​ $ — ​ $ — (1) 3.25% fixed rate for five years then floating rate at 253.5 basis points over 3-month term SOFR. ​ ​

Subordinated Debentures

Subordinated Debentures	12 Months Ended
	Dec. 31, 2021
Subordinated Borrowings [Abstract]
Subordinated Debentures	12. SUBORDINATED DEBENTURES Sierra Statutory Trust II (“Trust II”), Sierra Capital Trust III (“Trust III”), and Coast Bancorp Statutory Trust II (“Trust IV”), (collectively, the “Trusts”) exist solely for the purpose of issuing trust preferred securities fully and unconditionally guaranteed by the Company. For financial reporting purposes, the Trusts are not consolidated and the Floating Rate Junior Subordinated Deferrable Interest Debentures (the “Subordinated Debentures”) held by the Trusts and issued and guaranteed by the Company are reflected in the Company’s consolidated balance sheet in accordance with provisions of ASC Topic 810. Under applicable regulatory guidance, the amount of trust preferred securities that is eligible as Tier 1 capital is limited to twenty-five percent of the Company’s Tier 1 capital on a pro forma basis. At December 31, 2021, all $35.3 million of the Company’s trust preferred securities qualified as Tier 1 capital. During the first quarter of 2004, Sierra Statutory Trust II issued 15,000 Floating Rate Capital Trust Pass-Through Securities (TRUPS II), with a liquidation value of $1,000 per security, for gross proceeds of $15,000,000. The entire proceeds of the issuance were invested by Trust II in $15,464,000 of Subordinated Debentures issued by the Company, with identical maturity, re-pricing and payment terms as the TRUPS II. The Subordinated Debentures, purchased by Trust II, represent the sole assets of the Trust II. Those Subordinated Debentures mature on March 17, 2034, bear a current interest rate of 2.97% (based on 3-month LIBOR plus 2.75%), with re-pricing and payments due quarterly. Those Subordinated Debentures are currently redeemable by the Company, subject to receipt by the Company of prior approval from the Federal Reserve Bank, on any March 17 th th th th The TRUPS II are subject to mandatory redemption to the extent of any early redemption of the related Subordinated Debentures and upon maturity of the Subordinated Debentures on March 17, 2034. Trust II has the option to defer payment of the distributions for a period of up to five years, subject to certain conditions, including that the Company may not pay dividends on its common stock during such period. The TRUPS II issued in the offering were sold in private transactions pursuant to an exemption from registration under the Securities Act of 1933, as amended. The Company has guaranteed, on a subordinated basis, distributions and other payments due on the TRUPS II. During the second quarter of 2006, Sierra Capital Trust III issued 15,000 Floating Rate Capital Trust Pass-Through Securities (TRUPS III), with a liquidation value of $1,000 per security, for gross proceeds of $15,000,000. The entire proceeds of the issuance were invested by Trust III in $15,464,000 of Subordinated Debentures issued by the Company, with identical maturity, repricing and payment terms as the TRUPS III. The Subordinated Debentures, purchased by Trust III, represent the sole assets of the Trust III. Those Subordinated Debentures mature on September 23, 2036, bear a current interest rate of 1.62% (based on 3-month LIBOR plus 1.40%), with repricing and payments due quarterly. Those Subordinated Debentures are redeemable by the Company, subject to receipt by the Company of prior approval from the Federal Reserve Bank, on any March 23 rd rd rd rd Trust III has the option to defer payment of the distributions for a period of up to five years, subject to certain conditions, including that the Company may not pay dividends on its common stock during such period. The TRUPS III issued in the offering were sold in private transactions pursuant to an exemption from registration under the Securities Act of 1933, as amended. The Company has guaranteed, on a subordinated basis, distributions and other payments due on the TRUPS III. During the third quarter of 2016, the Company acquired Coast Bancorp Statutory Trust II, which had issued 7,000 Floating Rate Capital Trust Pass-Through Securities (TRUPS IV), with a liquidation value of $1,000 per security, for gross proceeds of $7,000,000. The entire proceeds of the issuance were invested by Trust IV in $7,217,000 of Subordinated Debentures issued by Coast Bancorp with identical maturity, re-pricing and payment terms as the TRUPS IV. The Subordinated Debentures, purchased by Trust IV, represent the sole assets of the Trust IV. Those Subordinated Debentures mature on December 15, 2037, bear a current interest rate of 1.70% (based on 3-month LIBOR plus 1.50%), with re-pricing and payments due quarterly. Those Subordinated Debentures are currently redeemable by the Company, subject to receipt by the Company of prior approval from the Federal Reserve Bank, on any March 15 th th th th The TRUPS IV are subject to mandatory redemption to the extent of any early redemption of the related Subordinated Debentures and upon maturity of the Subordinated Debentures on December 15, 2037. Coast Bancorp Statutory Trust II has the option to defer payment of the distributions for a period of up to five years, subject to certain conditions, including that the Company may not pay dividends on its common stock during such period. The TRUPS IV issued in the offering were sold in private transactions pursuant to an exemption from registration under the Securities Act of 1933, as amended. The Company has guaranteed, on a subordinated basis, distributions and other payments due on the TRUPS IV.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	13. INCOME TAXES ​ The provision for income taxes follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Federal: ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 8,186 ​ $ 7,979 ​ $ 7,081 Deferred ​ ​ 135 ​ ​ (1,697) ​ ​ (228) ​ ​ ​ 8,321 ​ ​ 6,282 ​ ​ 6,853 State: ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ ​ 5,916 ​ ​ 5,711 ​ ​ 4,771 Deferred ​ ​ (50) ​ ​ (914) ​ ​ 133 ​ ​ ​ 5,866 ​ ​ 4,797 ​ ​ 4,904 ​ ​ $ 14,187 ​ $ 11,079 ​ $ 11,757 ​ ​ The components of the net deferred tax asset, included in other assets, are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Deferred tax assets: ​ ​ ​ ​ ​ ​ Allowance for loan and lease losses ​ $ 4,215 ​ $ 5,244 Foreclosed assets ​ ​ 126 ​ ​ 126 Deferred compensation ​ ​ 4,511 ​ ​ 4,147 Accrued reserves ​ ​ 555 ​ ​ 325 Non-accrual loans ​ ​ 363 ​ ​ 403 Lease liability ​ ​ 1,752 ​ ​ 2,283 Loan fair value adjustment ​ ​ 420 ​ ​ 956 Capital losses carried forward ​ ​ — ​ ​ 29 Net operating losses ​ ​ 1,592 ​ ​ 1,751 State income tax deduction ​ ​ 1,179 ​ ​ 1,170 Other ​ ​ 992 ​ ​ 986 Total deferred tax assets ​ ​ 15,705 ​ ​ 17,420 Deferred tax liabilities: ​ ​ ​ ​ ​ ​ Deferred loan costs ​ ​ (1,288) ​ ​ (2,482) Right-of-use asset ​ ​ (1,618) ​ ​ (2,127) Intangibles ​ ​ (579) ​ ​ (832) Premises and equipment ​ ​ (917) ​ ​ (750) Net unrealized gain on securities available-for-sale ​ ​ (4,687) ​ ​ (7,725) Other ​ ​ (2,824) ​ ​ (2,665) Total deferred tax liabilities ​ ​ (11,913) ​ ​ (16,581) Net deferred tax assets ​ $ 3,792 ​ $ 839 ​ The expense for income taxes differs from amounts computed by applying the statutory Federal income tax rates to income before income taxes. The significant items comprising these differences consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Income tax expense at federal statutory rate ​ $ 12,012 ​ $ 9,770 ​ $ 10,021 Increase (decrease) resulting from: ​ ​ ​ ​ ​ ​ ​ ​ ​ State franchise tax expense, net of federal tax effect ​ ​ 4,634 ​ ​ 3,790 ​ ​ 3,872 Tax exempt municipal income ​ ​ (1,306) ​ ​ (1,199) ​ ​ (952) Affordable housing tax credits ​ ​ (524) ​ ​ (518) ​ ​ (538) Excess tax benefit of stock-based compensation ​ ​ (109) ​ ​ (90) ​ ​ (133) Cash surrender value - life insurance ​ ​ (556) ​ ​ — ​ ​ — Other ​ ​ 36 ​ ​ (674) ​ ​ (513) ​ ​ $ 14,187 ​ $ 11,079 ​ $ 11,757 Effective tax rate ​ ​ 24.80% ​ ​ 23.81% ​ ​ 24.64% ​ The Company is subject to federal income tax and income tax of various states. Our federal income tax returns for the years ended December 31, 2018, 2019 and 2020 are open to audit by the federal authorities and our California state tax returns for the years ended December 31, 2017, 2018, 2019 and 2020 are open to audit by the state authorities. The Company has net operating loss carry forwards of approximately $4.8 million for federal income and approximately $6.9 million for California franchise tax purposes. Net operating loss carry forwards, to the extent not used will begin to expire in 2031. Net operating loss carry forwards available from acquisitions are substantially limited by Section 382 of the Internal Revenue Code and benefits not expected to be realized due to the limitation have been excluded from the deferred tax asset and net operating loss carry forward amounts noted above. There were no recorded interest or penalties related to uncertain tax positions as part of income tax for the years ended December 31, 2021, 2020, and 2019, respectively. We do not expect the total amount of unrecognized tax benefits to significantly increase or decrease within the next twelve months

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. COMMITMENTS AND CONTINGENCIES Letter of Credit The Company holds two letters of credit with the Federal Home Loan Bank of San Francisco totaling $128.6 million. A $125.0 million letter of credit is pledged to secure public deposits at December 31, 2021 and a $3.6 million standby letter of credit was obtained on behalf of one of our customers to guarantee financial performance. Should the standby letter of credit be drawn upon, the customer would reimburse the Company from an existing line of credit. Federal Reserve Requirements Banks are normally required to maintain reserves with the Federal Reserve Bank equal to a specified percentage of their reservable deposits less vault cash. The Federal Reserve Bank has temporarily eliminated the reserve requirement in response to the COVID-19 pandemic, in an effort to free up available cash for lending purposes. There were no reserve balances required to be maintained at the Federal Reserve Bank by the Company at December 31, 2021 and 2020. Financial Instruments with Off-Balance-Sheet Risk The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business. These financial instruments consist of commitments to extend credit and standby letters of credit. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheet. The Company’s exposure to credit loss in the event of nonperformance by the other party for commitments to extend credit and letters of credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and letters of credit as it does for loans included on the balance sheet. The following financial instruments represent off-balance-sheet credit risk (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Fixed-rate commitments to extend credit ​ $ 72,946 ​ $ 75,291 Variable-rate commitments to extend credit ​ $ 481,082 ​ $ 366,525 Standby letters of credit ​ $ 6,651 ​ $ 8,104 ​ Commitments to extend credit consist primarily of the unused or unfunded portions of the following: home equity lines of credit; commercial real estate construction loans, where disbursements are made over the course of construction; commercial revolving lines of credit; mortgage warehouse lines of credit; unsecured personal lines of credit; and formalized (disclosed) deposit account overdraft lines. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Commitments to extend credit are made at both fixed and variable rates of interest as stated in the table above. Standby letters of credit are generally unsecured and are issued by the Company to guarantee the performance of a customer to a third party, while commercial letters of credit represent the Company’s commitment to pay a third party on behalf of a customer upon fulfillment of contractual requirements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. Concentration in Real Estate Lending At December 31, 2021, in management’s judgment the Company had a concentration of loans secured by real estate. At that date, approximately 87% of the Company’s loans were real estate related. Balances secured by commercial buildings and construction and development loans represented 71% of all real estate loans, while loans secured by non-construction residential properties accounted for 22%, and loans secured by farmland were 6% of real estate loans. Although management believes the loans within these concentrations have no more than the normal risk of collectability, a decline in the performance of the economy in general or a decline in real estate values in the Company’s primary market areas, in particular, could have an adverse impact on collectability. Concentration by Geographic Location The Company extends commercial, real estate mortgage, real estate construction and consumer loans to customers primarily in the South Central San Joaquin Valley of California, specifically Tulare, Fresno, Kern, Kings and Madera counties; and the Coastal counties of San Luis Obispo, Ventura and Santa Barbara. The ability of a substantial portion of the Company’s customers to honor their contracts is dependent on the economy in these areas. Although the Company’s loan portfolio is diversified, there is a relationship in those regions between the local agricultural economy and the economic performance of loans made to non-agricultural customers. Legal Matters In the ordinary course of our business, the Company is subject to legal proceedings and claims which we believe are incidental to the operation of our business. The outcome of such legal actions and the timing of ultimate resolution are inherently difficult to predict. Upon consultation with legal counsel and based on information currently available to us, management does not expect the amount of any resulting liability, in addition to amounts already accrued and taking into consideration insurance which may be applicable, to have a material adverse effect on the consolidated financial position or results of operations of the Company. Given the nature, scope and complexity of the extensive legal and regulatory landscape applicable to banking (including laws and regulations governing consumer protection, fair lending, privacy, information security and anti-money laundering and anti-terrorism laws), we like all banking organizations, are subject to heightened legal and regulatory compliance and litigation risk. The Company has established litigation and legal reserves, where appropriate, in accordance with FASB guidance over loss contingencies (ASC 450). The outcome of litigation and other legal and regulatory matters is inherently uncertain, however, and it is possible that one or more of the legal or regulatory matters currently pending or threatened could have a material adverse effect on our liquidity, consolidated financial position, and/or results of operations. ​

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2021
Stockholders' Equity Note [Abstract]
Shareholders' Equity	15. SHAREHOLDERS’ EQUITY Share Repurchase Plan At December 31, 2021, the Company had a stock repurchase plan which has no expiration date. During the year ended December 31, 2021, the Company repurchased 187,438 shares. The total number of shares available for repurchase at December 31, 2021 was 812,562. Repurchases are generally made in the open market at market prices. Earnings Per Share A reconciliation of the numerators and denominators of the basic and diluted earnings per share computations is as follows (dollars in thousands, except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Years Ended December 31, ​ 2021 2020 2019 Basic Earnings Per Share ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income (dollars in thousands) ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 Weighted average shares outstanding ​ ​ 15,241,957 ​ ​ 15,216,749 ​ ​ 15,311,113 Basic earnings per share ​ $ 2.82 ​ $ 2.33 ​ $ 2.35 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted Earnings Per Share ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income (dollars in thousands) ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 Weighted average shares outstanding ​ ​ 15,241,957 ​ ​ 15,216,749 ​ ​ 15,311,113 Effect of dilutive stock options ​ ​ 111,488 ​ ​ 63,576 ​ ​ 125,998 Weighted average shares outstanding ​ ​ 15,353,445 ​ ​ 15,280,325 ​ ​ 15,437,111 Diluted earnings per share ​ $ 2.80 ​ $ 2.32 ​ $ 2.33 ​ Stock options for 337,004, 348,328, and 243,657 shares of common stock were not considered in computing diluted earnings per common share for 2021, 2020, and 2019, respectively, because they were antidilutive. Stock Options On March 16, 2017 the Company’s Board of Directors approved and adopted the 2017 Stock Incentive Plan (the “2017 Plan”), which became effective May 24, 2017 pursuant to the approval of the Company’s shareholders. The 2017 Plan replaced the Company’s 2007 Stock Incentive Plan (the “2007 Plan”), which expired by its own terms on March 15, 2017. Options to purchase 172,689 shares that were granted under the 2007 Plan were still outstanding as of December 31, 2021, and remain unaffected by that plan’s expiration. The 2017 Plan provides for the issuance of both “incentive” and “nonqualified” stock options to officers and employees, and of “nonqualified” stock options to non-employee directors and consultants of the Company. The 2017 Plan also provides for the issuance of restricted stock awards to these same classes of eligible participants. The total number of shares of the Company’s authorized but unissued stock reserved for issuance pursuant to awards under the 2017 Plan was initially 850,000 shares, and the number remaining available for grant as of December 31, 2021, was 408,909. All options granted under the 2017 A summary of the Company’s stock option activity follows (shares in thousands, except exercise price): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ Shares Weighted Average Exercise Price Aggregate Intrinsic Value (1) Shares Weighted Average Exercise Price Shares Weighted Average Exercise Price Outstanding, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning of year ​ 495 ​ $ 23.67 ​ ​ ​ ​ 458 ​ $ 21.08 ​ 453 ​ $ 18.45 Exercised or released ​ (33) ​ $ 14.64 ​ ​ ​ ​ (67) ​ $ 11.65 ​ (83) ​ $ 13.07 Granted ​ — ​ $ — ​ ​ ​ ​ 126 ​ $ 27.11 ​ 102 ​ $ 26.97 Canceled ​ (45) ​ $ 26.36 ​ ​ ​ ​ (21) ​ $ 26.01 ​ (14) ​ $ 26.77 Expired ​ (1) ​ $ 10.58 ​ ​ ​ ​ (1) ​ $ 10.73 ​ — ​ $ — Outstanding, end of year ​ 416 ​ $ 24.15 ​ $ 1,338 ​ 495 ​ $ 23.67 ​ 458 ​ $ 21.08 Exercisable, end of year (2) ​ 355 ​ $ 23.62 ​ $ 1,336 ​ 324 ​ $ 21.97 ​ 322 ​ $ 18.89 (1) The aggregate intrinsic value of stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on December 31, 2021. This amount changes based on changes in the market value of the Company’s stock. (2) The weighted average remaining contractual life of stock options outstanding and exercisable on December 31, 2021 was 5.9 years and 5.6 years, respectively. Information related to stock options during each year follows (dollars in thousands, except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 2019 Weighted-average grant-date fair value per share ​ $ — ​ $ 4.76 ​ $ 6.60 Total intrinsic value of stock options exercised ​ $ 346 ​ $ 705 ​ $ 1,150 Total fair value of stock options vested ​ $ 418 ​ $ 489 ​ $ 438 ​ $0.3 million in cash was received from the exercise of 25,452 shares during the period ended December 31, 2021, with a related tax benefit of $0.1 million. $0.8 million in cash was received from the exercise of 66,470 shares during the period ended December 31, 2020, with a related tax benefit of $0.5 million. $1.1 million in cash was received from the exercise of 83,261 shares during the period ended December 31, 2019, with a related tax benefit of $0.3 million. The Company is using the Black-Scholes model to value stock options. In accordance with U.S. GAAP, charges of $0.1 million, $0.4 million, and $0.5 million are reflected in the Company’s income statements for the years ended December 31, 2021, 2020, and 2019, respectively, as pre-tax compensation and directors’ expense related to stock options. The related tax benefit of these options is $0.03 million for the year ended December 31, 2021, and $0.1 million for the two years ended December 31, 2020 and 2019. Unamortized compensation expense associated with unvested stock options outstanding at December 31, 2021 was $0.4 million, which will be recognized over a weighted average period of 2.9 years. Restricted Stock Grants The Company’s restricted stock awards are time-vested, non-transferrable shares of common stock and are available to be granted to the Company’s employees and directors. The vesting period of restricted stock awards is determined at the time the awards are issued, and different awards may have different vesting terms; provided, however, that no installment of any restricted stock award shall become vested less than one year from the grant date. Restricted stock awards are valued utilizing the fair value of the Company’s stock at the grant date. During the year ending 2021, 73,912 shares were granted to employees and directors of the Company. These awards are expensed on a straight-line basis over the vesting period. Compensation expense related to restricted stock units for the years ended December 31, 2021, 2020 and 2019 was $0.9 million, $0.2 million, and $0 respectively, and the recognized income tax benefit related to this expense was $0.3 million, $0.1 million, and $0, respectively. As of December 31, 2021, there was $3.0 million of unamortized compensation and directors’ cost related to unvested restricted stock awards granted under the 2017 plan. That cost is expected to be amortized over a weighted average period of 3.2 years. The total fair value of shares vested during the year ended December 31, 2021 was $0.7 million. There were no shares vested during the years ended December 31, 2020 and 2019. A summary of the Company’s nonvested shares for the year follows (shares in thousands, except grant date fair value): ​ ​ ​ ​ ​ ​ Nonvested Shares ​ Shares ​ ​ Weighted Average Grant-Date Fair Value Nonvested at January 1, 2021 ​ 149 ​ $ 18.00 Granted ​ 74 ​ ​ 26.66 Vested ​ (40) ​ ​ 18.00 Forfeited ​ (18) ​ ​ 18.22 Nonvested at December 31, 2021 ​ 165 ​ $ 21.85 ​

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2021
Banking And Thrift [Abstract]
Regulatory Matters	16. REGULATORY MATTERS The Company and the Bank are subject to regulatory capital requirements administered by the Board of Governors of the Federal Reserve System and the FDIC. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital. Management believes as of December 31, 2021, the Company and Bank meet all capital adequacy requirements to which they are subject. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized , significantly undercapitalized , and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required. At year-end December 31, 2021 and 2020, notification from the FDIC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the Bank's categorization. In 2019, the federal banking agencies jointly issued a final rule that provides for an optional, simplified measure of capital adequacy, the community bank leverage ratio framework (CBLR framework), for qualifying community banking organizations, consistent with Section 201 of the Economic Growth, Regulatory Relief, and Consumer Protection Act. The final rule became effective on January 1, 2020 and was elected by the Bank at that time. In April 2020, the federal banking agencies issued an interim final rule that makes temporary changes to the CBLR framework, pursuant to section 4012 of the Coronavirus Aid, Relief, and Economic Security (CARES) Act, and a second interim final rule that provides a graduated increase in the community bank leverage ratio requirement after the expiration of the temporary changes implemented pursuant to section 4012 of the CARES Act. The community bank leverage ratio removes the requirement for qualifying banking organizations to calculate and report risk-based capital but rather only requires a Tier 1 to average assets (leverage) ratio. Qualifying banking organizations that elect to use the community bank leverage ratio framework and that maintain a leverage ratio of greater than required minimums will be considered to have satisfied the generally applicable risk based and leverage capital requirements in the agencies' capital rules (generally applicable rule) and, if applicable, will be considered to have met the well capitalized ratio requirements for purposes of section 38 of the Federal Deposit Insurance Act. Under the interim final rules the community bank leverage ratio minimum requirement is 8% as of December 31, 2020, 8.5% for calendar year 2021, and 9% for calendar year 2022 and beyond. The interim rule allows for a two-quarter grace period to correct a ratio that falls below the required amount, provided that the bank maintains a leverage ratio of 7% as of December 31, 2020, 7.5% for calendar year 2021, and 8% for calendar year 2022 and beyond. Under the final rule, an eligible banking organization can opt out of the CBLR framework and revert back to the risk-weighting framework without restriction. As of December 31, 2021, both the Company and Bank were qualifying community banking organizations as defined by the federal banking agencies and elected to measure capital adequacy under the CBLR framework. ​ Actual and required capital amounts (dollars in thousands) and ratios are presented below at year end. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Actual ​ To Be Well Capitalized Under Prompt Corrective Action Regulations (CBLR Framework) 2021 Capital Amount Ratio Capital Amount Ratio Tier 1 (Core) Capital to average total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sierra Bancorp and subsidiary ​ $ 356,800 ​ 10.43% ​ $ 290,851 ​ 8.50% Bank of the Sierra ​ $ 387,059 ​ 11.31% ​ $ 290,817 ​ 8.50% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Actual ​ To Be Well Capitalized Under Prompt Corrective Action Regulations 2020 Capital Amount Ratio Capital Amount Ratio Tier 1 (Core) Capital to average total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sierra Bancorp and subsidiary ​ $ 330,200 ​ 10.50% ​ $ 251,595 ​ 8.00% Bank of the Sierra ​ ​ 318,194 ​ 10.12% ​ ​ 251,572 ​ 8.00% ​ ​ Dividend Restrictions The Company’s ability to pay cash dividends is dependent on dividends paid to it by the Bank, and is also limited by state corporation law. California law allows a California corporation to pay dividends if the company’s retained earnings equal at least the amount of the proposed dividend plus any preferred dividend arrears amount. If a California corporation does not have sufficient retained earnings available for the proposed dividend, it may still pay a dividend to its shareholders if immediately after the dividend the value of the company’s assets would equal or exceed the sum of its total liabilities plus any preferred dividend arrears amount. Dividends from the Bank to the Company are restricted under California law to the lesser of the Bank’s retained earnings or the Bank’s net income for the latest three fiscal years, less dividends previously declared during that period, or, with the approval of the Department of Financial Protection and Innovation, to the greater of the retained earnings of the Bank, the net income of the Bank for its last fiscal year, or the net income of the Bank for its current fiscal year. As of December 31, 2021, the maximum amount available for dividend distribution under this restriction was approximately $77.6 million.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2021
Compensation And Retirement Disclosure [Abstract]
Benefit Plans	17. BENEFIT PLANS Salary Continuation Agreements, Directors’ Retirement and Officer Supplemental Life Insurance Plans The Company has entered into salary continuation agreements with its executive officers, and has established retirement plans for qualifying members of the Board of Directors. The plans provide for annual benefits for up to fifteen years after retirement or death. The benefit obligation under these plans totaled $5.1 million and was fully accrued for both of the years ended December 31, 2021 and 2020. The expense recognized under these arrangements totaled $0.4 million, $0.2 million and $0.3 million for the years ended December 31, 2021, 2020 and 2019, respectively. Salary continuation benefits paid to former directors or executives of the Company or their beneficiaries totaled $0.4 million, $0.4 million and $0.3 million for the years ended December 31, 2021, 2020 and 2019. Certain officers of the Company have supplemental life insurance policies with death benefits available to the officers’ beneficiaries. In connection with these plans the Company has purchased, or acquired through merger, single premium life insurance policies with cash surrender values totaling $43.2 million at December 31, 2021 and 2020. Officer and Director Deferred Compensation Plan The Company has established a deferred compensation plan for certain members of the management group and a deferred fee plan for directors for the purpose of providing the opportunity for participants to defer compensation. The Company bears the costs for the plan’s administration and the interest earned on participant deferrals. The related administrative expense was not material for the years ended December 31, 2021, 2020 and 2019. In connection with this plan, life insurance policies with cash surrender values totaled $11.0 million and $9.3 million at December 31, 2021 and 2020, respectively. 401(k) Savings Plan The 401(k) savings plan (the “Plan”) allows participants to defer, on a pre-tax basis, up to 15% of their salary (subject to Internal Revenue Service limitations) and accumulate tax-deferred earnings as a retirement fund. The Bank may make a discretionary contribution to match a specified percentage of the first 6% of the participants’ contributions annually. The amount of the matching contribution was 95%, 90% and 95% for the years ended December 31, 2021, 2020 and 2019, respectively. The matching contribution is discretionary, vests over a period of five years from the participants’ hire date, and is subject to the approval of the Board of Directors. The Company contributed $1.2 million, $1.1 million, and $1.1 million to the Plan in 2021, 2020 and 2019, respectively.

Noninterest Income

Noninterest Income	12 Months Ended
	Dec. 31, 2021
Non-Interest Revenue [Abstract]
Non-interest Income	18. NONINTEREST INCOME The major grouping of noninterest revenue on the consolidated income statements includes several specific items: service charges on deposit accounts, gains on the sale of loans, credit card fees, check card fees, the net gain (loss) on sales and calls of investment securities available for sale, and the net increase (decrease) in the cash surrender value of life insurance. Noninterest income also includes one general category of “other income” of which the following are major components (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Included in other income: ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of limited partnerships ​ $ (524) ​ $ (1,189) ​ $ (2,079) Dividends on equity investments ​ ​ 737 ​ ​ 664 ​ ​ 789 Unrealized gains recognized on equity investments ​ ​ 857 ​ ​ 447 ​ ​ 232 Other ​ ​ 4,019 ​ ​ 4,638 ​ ​ 3,223 Total other noninterest income ​ $ 5,089 ​ $ 4,560 ​ $ 2,165 ​

Other Noninterest Expense

Other Noninterest Expense	12 Months Ended
	Dec. 31, 2021
Other Income and Expenses [Abstract]
Other Non-interest Expense	19. OTHER NONINTEREST EXPENSE Other noninterest expense consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Legal, audit and professional ​ $ 7,652 ​ $ 4,263 ​ $ 4,039 Data processing ​ ​ 5,890 ​ ​ 4,661 ​ ​ 4,564 Advertising and promotional ​ ​ 1,521 ​ ​ 1,889 ​ ​ 2,568 Deposit services ​ ​ 9,049 ​ ​ 8,483 ​ ​ 7,962 Stationery and supplies ​ ​ 345 ​ ​ 446 ​ ​ 318 Telephone and data communication ​ ​ 2,013 ​ ​ 1,775 ​ ​ 1,529 Loan and credit card processing ​ ​ 501 ​ ​ 879 ​ ​ 675 Foreclosed assets expense (income), net ​ ​ 72 ​ ​ 253 ​ ​ 35 Postage ​ ​ 308 ​ ​ 321 ​ ​ 436 Other ​ ​ 2,780 ​ ​ 2,205 ​ ​ 2,082 Assessments ​ ​ 1,157 ​ ​ 717 ​ ​ 525 Total other noninterest expense ​ $ 31,288 ​ $ 25,892 ​ $ 24,733 ​

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	20. RELATED PARTY TRANSACTIONS During the normal course of business, the Bank enters into loans with related parties, including executive officers and directors. These loans are made with substantially the same terms, including rates and collateral, as loans to unrelated parties. The following is a summary of the aggregate activity involving related party borrowers (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Balance, beginning of year ​ $ 1,794 ​ $ 2,731 ​ $ 2,544 Disbursements ​ ​ 1,983 ​ ​ 7,114 ​ ​ 18,681 Amounts repaid ​ ​ (2,548) ​ ​ (8,051) ​ ​ (18,494) Effect of changes in composition of related parties ​ ​ (162) ​ ​ — ​ ​ — Balance, end of year ​ $ 1,067 ​ $ 1,794 ​ $ 2,731 Undisbursed commitments to related parties ​ $ 2,156 ​ $ 2,635 ​ $ 1,829 ​ Deposits from related parties held by the Bank at December 31, 2021 and 2020 amounted to $9.9 million and $6.1 million, respectively.

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value	21. FAIR VALUE Fair value is defined by U.S. GAAP as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. U.S. GAAP also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value: ● Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. ● Level 2: Significant observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, and other inputs that are observable or can be corroborated by observable market data. ● Level 3: Significant unobservable inputs that reflect a company’s own assumptions about the factors that market participants would use in pricing an asset or liability. The Company used the following methods and significant assumptions to estimate fair values for each category of financial asset noted below: Securities Collateral-dependent impaired loans Foreclosed assets ​ Assets and liabilities measured at fair value on a recurring basis are summarized below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2021, using ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Realized Gain/(Loss) Securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ $ — ​ $ 1,574 ​ $ — ​ $ 1,574 ​ $ — Mortgage-backed securities ​ ​ — ​ ​ 306,727 ​ ​ — ​ ​ 306,727 ​ ​ — State and political subdivisions ​ ​ — ​ ​ 304,268 ​ ​ — ​ ​ 304,268 ​ ​ — Corporate bonds ​ ​ — ​ ​ 999 ​ ​ 27,530 ​ ​ 28,529 ​ ​ — Collateralized loan obligations ​ ​ — ​ ​ 136,509 ​ ​ 195,707 ​ ​ 332,216 ​ ​ — Total available-for-sale securities ​ $ — ​ $ 750,077 ​ $ 223,237 ​ $ 973,314 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2020, using ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Realized Gain/(Loss) Securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ $ — ​ $ 1,800 ​ $ — ​ $ 1,800 ​ $ — Mortgage-backed securities ​ ​ — ​ ​ 314,435 ​ ​ — ​ ​ 314,435 ​ ​ — State and political subdivisions ​ ​ — ​ ​ 227,739 ​ ​ — ​ ​ 227,739 ​ ​ — Total available-for-sale securities ​ $ — ​ $ 543,974 ​ $ — ​ $ 543,974 ​ $ — ​ The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2021 and 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collateralized Loan Obligations Corporate Bonds ​ ​ 2021 ​ 2020 ​ 2021 ​ 2020 Balance of recurring Level 3 assets at January 1, ​ $ — ​ $ — ​ $ — ​ $ — Purchases ​ ​ 195,707 ​ ​ — ​ ​ 27,530 ​ ​ — Balance of recurring Level 3 assets at December 31, ​ $ 195,707 ​ $ — ​ $ 27,530 ​ $ — ​ The following table presents quantitative information about recurring level 3 fair value measurements at December 31, 2021 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Range ​ Fair Value ​ Valuation Technique(s) Unobservable Input(s) ​ Min ​ Max ​ Weighted Average Corporate Bonds ​ $ 27,530 ​ New issue pricing ​ Risk appetite ​ N/A ​ N/A ​ N/A ​ ​ ​ ​ ​ Secondary market pricing ​ Market volatility ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit quality of issuer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit spread ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collateralized Loan Obligations ​ ​ 195,707 ​ New issue pricing ​ Constant prepayment rate ​ N/A ​ N/A ​ N/A ​ ​ ​ ​ ​ Secondary market pricing ​ Default rate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit quality of issuer ​ Recovery rate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit spread ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 223,237 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ There were no assets measured at fair value on a recurring basis with level 3 fair value measurements at December 31, 2020. Assets and liabilities measured at fair market value on a non-recurring basis are summarized below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Collateral dependent impaired loans ​ $ — ​ $ 221 ​ $ 177 ​ $ 398 Foreclosed assets ​ $ — ​ $ 93 ​ $ — ​ $ 93 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Collateral dependent impaired loans ​ $ — ​ $ 550 ​ $ — ​ $ 550 Foreclosed assets ​ $ — ​ $ 971 ​ $ — ​ $ 971 ​ The following table presents quantitative information about level 3 fair value measurements for assets measured at fair value on a non-recurring basis at December 31, 2021 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Range ​ Fair Value ​ Valuation Technique(s) Unobservable Input(s) ​ Min ​ Max ​ Weighted Average Impaired loans - commercial and industrial ​ $ 177 ​ Fair value of collateral ​ Collateral discount ​ 50% ​ 70% ​ 56% ​ ​ $ 177 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ There were no assets measured at fair value on a non-recurring basis with level 3 fair value measurements at December 31, 2020. ​

Disclosures about Fair Value of

Disclosures about Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2021
Investments All Other Investments [Abstract]
Disclosures about Fair Value of Financial Instruments	22. DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS Disclosures include estimated fair values for financial instruments for which it is practicable to estimate fair value. These estimates are made as of the respective balance sheet dates based on relevant market data and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering the Company’s entire holdings of a particular financial instrument for sale at one time, nor do they attempt to estimate the value of anticipated future business related to the instruments. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of these estimates. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding current economic conditions, risk characteristics of various financial instruments and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the fair values presented. The following methods and assumptions were used by the Company to estimate the fair value of its financial instruments at December 31, 2021 and 2020: Cash and cash equivalents, and fed funds sold Securities Loans and leases Loans held for sale Deposits Short-term borrowings: Long-term borrowings: Subordinated debentures Carrying amount and estimated fair values of financial instruments were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ ​ ​ ​ ​ Estimated Fair Value ​ Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Financial Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 257,528 ​ $ 257,528 ​ $ — ​ $ — ​ $ 257,528 Securities available for sale ​ ​ 973,314 ​ ​ — ​ ​ 750,077 ​ ​ 223,237 ​ ​ 973,314 Loans and leases held for investment ​ ​ 1,973,207 ​ ​ — ​ ​ — ​ ​ 1,960,966 ​ ​ 1,960,966 Collateral dependent impaired loans ​ ​ 398 ​ ​ — ​ ​ 221 ​ ​ 177 ​ ​ 398 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noninterest bearing ​ $ 1,084,544 ​ $ 1,084,544 ​ $ — ​ $ — ​ $ 1,084,544 Interest bearing ​ ​ 1,697,028 ​ ​ — ​ ​ 1,696,124 ​ ​ — ​ ​ 1,696,124 Repurchase agreements ​ ​ 106,937 ​ ​ — ​ ​ 106,937 ​ ​ — ​ ​ 106,937 Long-term borrowings ​ ​ 49,141 ​ ​ — ​ ​ 49,118 ​ ​ — ​ ​ 49,118 Subordinated debentures ​ ​ 35,302 ​ ​ — ​ ​ 33,281 ​ ​ — ​ ​ 33,281 ​ ​ ​ ​ ​ ​ Notional Amount Off-balance-sheet financial instruments: ​ ​ ​ Commitments to extend credit ​ $ 554,028 Standby letters of credit ​ ​ 6,651 ​ Carrying amount and estimated fair values of financial instruments were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ ​ ​ ​ ​ Estimated Fair Value ​ Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Financial Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 71,417 ​ $ 71,417 ​ $ — ​ $ — ​ $ 71,417 Securities available for sale ​ ​ 543,974 ​ ​ — ​ ​ 543,974 ​ ​ — ​ ​ 543,974 Loans and leases held for investment ​ ​ 2,441,676 ​ ​ — ​ ​ — ​ ​ 2,450,340 ​ ​ 2,450,340 Collateral dependent impaired loans ​ ​ 550 ​ ​ — ​ ​ 550 ​ ​ — ​ ​ 550 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noninterest bearing ​ $ 943,664 ​ $ 943,664 ​ $ — ​ $ — ​ $ 943,664 Interest bearing ​ ​ 1,680,942 ​ ​ — ​ ​ 1,680,814 ​ ​ — ​ ​ 1,680,814 Fed funds purchased and repurchase agreements ​ ​ 39,138 ​ ​ — ​ ​ 39,138 ​ ​ — ​ ​ 39,138 Short-term borrowings ​ ​ 142,900 ​ ​ — ​ ​ 142,896 ​ ​ — ​ ​ 142,896 Subordinated debentures ​ ​ 35,124 ​ ​ — ​ ​ 24,364 ​ ​ — ​ ​ 24,364 ​ ​ ​ ​ ​ ​ Notional Amount Off-balance-sheet financial instruments: ​ ​ ​ Commitments to extend credit ​ $ 441,816 Standby letters of credit ​ ​ 8,104 ​ ​ ​

Qualified Affordable Housing Pr

Qualified Affordable Housing Project Investments	12 Months Ended
	Dec. 31, 2021
Investments in Affordable Housing Projects [Abstract]
Qualified Affordable Housing Project Investments	23. QUALIFIED AFFORDABLE HOUSING PROJECT INVESTMENTS T During the years ended December 31, 2021, 2020 and 2019, the Company recognized amortization expense on these investments of $0.5 million, $0.6 million, and $1.8 million, respectively which was included within pretax income on the consolidated statements of income. Additionally, during the years ended December 31, 2021, 2020 and 2019 the Company recognized tax credits and other benefits from its investment in affordable housing tax credits of $0.5 million. The Company had no impairment losses during the years ended December 31, 2021, 2020 and 2019.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	24. REVENUE FROM CONTRACTS WITH CUSTOMERS All of the Company’s revenue from contracts with customers in the scope of ASC 606 is recognized within Noninterest Income. The following table presents the Company’s sources of Noninterest Income for the twelve months ended December 31, 2021 and 2020. Items outside the scope of ASC 606 are noted as such (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 Noninterest income ​ ​ ​ ​ ​ ​ Service charges on deposits ​ ​ ​ ​ ​ ​ Returned item and overdraft fees ​ $ 4,924 ​ $ 5,078 Other service charges on deposits ​ ​ 6,922 ​ ​ 6,687 Debit card interchange income ​ ​ 8,485 ​ ​ 7,023 Loss on limited partnerships (1) ​ ​ (524) ​ ​ (1,189) Dividends on equity investments (1) ​ ​ 737 ​ ​ 664 Unrealized gains recognized on equity investments (1) ​ ​ 857 ​ ​ 447 Net gains (losses) on sale of securities (1) ​ ​ 11 ​ ​ 390 Other (1) ​ ​ 6,667 ​ ​ 7,050 Total noninterest income ​ $ 28,079 ​ $ 26,150 ​ ​ ​ ​ ​ ​ ​ Noninterest expense ​ ​ ​ ​ ​ ​ Salaries and employee benefits (1) ​ $ 42,431 ​ $ 40,178 Occupancy expense (1) ​ ​ 9,837 ​ ​ 9,842 Gains on sale of OREO ​ ​ (153) ​ ​ (10) Other (1) ​ ​ 31,441 ​ ​ 25,902 Total noninterest expense ​ $ 83,556 ​ $ 75,912 (1) Not within the scope of ASC 606. Revenue streams are not related to contracts with customers and are accounted for on an accrual basis under other provisions of GAAP.

Parent Only Condensed Financial

Parent Only Condensed Financial Statements	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Parent Only Condensed Financial Statements	25. PARENT ONLY CONDENSED FINANCIAL STATEMENTS BALANCE SHEETS Years Ended December 31, 2021 and 2020 (dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 ASSETS ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 20,143 ​ $ 12,000 Investments in bank subsidiary ​ ​ 428,054 ​ ​ 367,014 Investment in trust subsidiaries ​ ​ 1,145 ​ ​ 1,145 Other assets ​ ​ 21 ​ ​ 22 ​ ​ $ 449,363 ​ $ 380,181 ​ ​ ​ ​ ​ ​ ​ LIABILITIES AND SHAREHOLDERS' EQUITY ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ Other liabilities ​ $ 2,426 ​ $ 1,161 Long-term debt ​ ​ 49,141 ​ ​ — Subordinated debentures ​ ​ 35,302 ​ ​ 35,124 Total liabilities ​ ​ 86,869 ​ ​ 36,285 Shareholders' equity: ​ ​ ​ ​ ​ ​ Common stock ​ ​ 116,917 ​ ​ 117,120 Retained earnings ​ ​ 234,410 ​ ​ 208,371 Accumulated other comprehensive gain, net of taxes ​ ​ 11,167 ​ ​ 18,405 Total shareholders' equity ​ ​ 362,494 ​ ​ 343,896 ​ ​ $ 449,363 ​ $ 380,181 ​ STATEMENTS OF INCOME Years Ended December 31, 2021, 2020 and 2019 (dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 2019 Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividend from subsidiary ​ $ 3,200 ​ $ 23,000 ​ $ 17,200 Other operating income ​ ​ — ​ ​ 43 ​ ​ — Total income ​ ​ 3,200 ​ ​ 23,043 ​ ​ 17,200 Expense ​ ​ ​ ​ ​ ​ ​ ​ ​ Salaries and employee benefits ​ ​ 779 ​ ​ 856 ​ ​ 582 Other expenses ​ ​ 2,728 ​ ​ 1,971 ​ ​ 2,664 Total expenses ​ ​ 3,507 ​ ​ 2,827 ​ ​ 3,246 Income before income taxes ​ ​ (307) ​ ​ 20,216 ​ ​ 13,954 Income tax benefit ​ ​ (1,037) ​ ​ (823) ​ ​ (1,138) Income before equity in undistributed income of subsidiary ​ ​ 730 ​ ​ 21,039 ​ ​ 15,092 Equity in undistributed income of subsidiary ​ ​ 42,282 ​ ​ 14,405 ​ ​ 20,869 Net income ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 ​ STATEMENTS OF CASH FLOWS Years Ended December 31, 2021, 2020 and 2019 (dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 2019 Cash flows from operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Undistributed net income of subsidiary ​ ​ (42,282) ​ ​ (14,405) ​ ​ (20,869) Decrease in other assets ​ ​ 179 ​ ​ 178 ​ ​ 178 Increase (decrease) in other liabilities ​ ​ 1,263 ​ ​ (41) ​ ​ (2) Net cash provided by operating activities ​ ​ 2,172 ​ ​ 21,176 ​ ​ 15,268 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment in subsidiary ​ ​ (25,000) ​ ​ — ​ ​ — Net cash used by investing activities ​ ​ (25,000) ​ ​ — ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options exercised ​ ​ 282 ​ ​ 775 ​ ​ 1,088 Repurchase of common stock ​ ​ (5,220) ​ ​ (2,562) ​ ​ (2,544) Dividends paid ​ ​ (13,232) ​ ​ (12,207) ​ ​ (11,332) Issuance of debentures, net ​ ​ 49,141 ​ ​ — ​ ​ — Net cash provided by (used) in financing activities ​ ​ 30,971 ​ ​ (13,994) ​ ​ (12,788) Net increase in cash and cash equivalents ​ ​ 8,143 ​ ​ 7,182 ​ ​ 2,480 Cash and cash equivalents, beginning of year ​ ​ 12,000 ​ ​ 4,818 ​ ​ 2,338 Cash and cash equivalents, end of year ​ $ 20,143 ​ $ 12,000 ​ $ 4,818 ​

Condensed Quarterly Results of

Condensed Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Condensed Quarterly Results of Operations	26. CONDENSED QUARTERLY RESULTS OF OPERATIONS The following table sets forth the Company’s unaudited results of operations for the four quarters of 2021 and 2020. In management’s opinion, the results of operations reflect all adjustments (which include only recurring adjustments) necessary to present fairly the condensed results for such periods (dollars in thousands, except per share data). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 Quarter Ended ​ December 31, September 30, June 30, March 31, Interest income ​ $ 27,897 ​ $ 27,629 ​ $ 28,092 ​ $ 29,458 Interest expense ​ ​ 1,331 ​ ​ 913 ​ ​ 903 ​ ​ 903 Net interest income ​ ​ 26,566 ​ ​ 26,716 ​ ​ 27,189 ​ ​ 28,555 Provision for loan and lease losses ​ ​ (1,200) ​ ​ (600) ​ ​ (2,100) ​ ​ 250 Noninterest income ​ ​ 7,103 ​ ​ 7,534 ​ ​ 6,612 ​ ​ 6,830 Noninterest expense ​ ​ 22,175 ​ ​ 20,875 ​ ​ 20,235 ​ ​ 20,271 Net income before taxes ​ ​ 12,694 ​ ​ 13,975 ​ ​ 15,666 ​ ​ 14,864 Provision for taxes ​ ​ 3,073 ​ ​ 3,370 ​ ​ 3,958 ​ ​ 3,786 Net income ​ $ 9,621 ​ $ 10,605 ​ $ 11,708 ​ $ 11,078 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted earnings per share ​ $ 0.63 ​ $ 0.69 ​ $ 0.76 ​ $ 0.72 Cash dividend per share ​ $ 0.22 ​ $ 0.22 ​ $ 0.21 ​ $ 0.21 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Quarter Ended ​ December 31, September 30, June 30, March 31, Interest income ​ $ 29,762 ​ $ 29,044 ​ $ 25,386 ​ $ 26,051 Interest expense ​ ​ 930 ​ ​ 970 ​ ​ 1,244 ​ ​ 2,264 Net interest income ​ ​ 28,832 ​ ​ 28,074 ​ ​ 24,142 ​ ​ 23,787 Provision for loan and lease losses ​ ​ 2,200 ​ ​ 2,350 ​ ​ 2,200 ​ ​ 1,800 Noninterest income ​ ​ 6,040 ​ ​ 7,104 ​ ​ 6,900 ​ ​ 6,106 Noninterest expense ​ ​ 20,757 ​ ​ 19,304 ​ ​ 18,033 ​ ​ 17,818 Net income before taxes ​ ​ 11,915 ​ ​ 13,524 ​ ​ 10,809 ​ ​ 10,275 Provision for taxes ​ ​ 2,936 ​ ​ 3,169 ​ ​ 2,506 ​ ​ 2,468 Net income ​ $ 8,979 ​ $ 10,355 ​ $ 8,303 ​ $ 7,807 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted earnings per share ​ $ 0.58 ​ $ 0.68 ​ $ 0.54 ​ $ 0.52 Cash dividend per share ​ $ 0.20 ​ $ 0.20 ​ $ 0.20 ​ $ 0.20 ​

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Consolidation and Basis of Presentation	Consolidation and Basis of Presentation The consolidated financial statements include the accounts of the Company and the consolidated accounts of its wholly-owned subsidiary, Bank of the Sierra. All significant intercompany balances and transactions have been eliminated. Certain reclassifications have been made to prior years’ balances to conform to classifications used in 2021. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America (U.S. GAAP) and prevailing practices within the banking industry. In accordance with U.S. GAAP, the Company’s investments in Sierra Statutory Trust II, Sierra Capital Trust III and Coast Bancorp Statutory Trust II are not consolidated and are accounted for under the equity method and included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the trusts are reflected on the Company’s consolidated balance sheet.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for loan and lease losses and the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans. In connection with the determination of the allowances for loan and lease losses and other real estate, management obtains independent appraisals for significant properties, evaluates the overall loan portfolio characteristics and delinquencies and monitors economic conditions.
Cash Flows	Cash Flows For purposes of reporting cash flows, cash and cash equivalents include cash and deposits with other financial institutions with original maturities within 90 days, and federal funds sold. Net cash flows are reported for customer loan and deposit transactions, interest bearing deposits in other financial institutions, and fed funds purchased and repurchase agreements.
Securities	Securities Debt securities may be classified as held to maturity and carried at amortized cost when management has the positive ability and intent to hold them to maturity. Debt securities are classified as available for sale when they might be sold before maturity. Equity securities with readily determinable fair values are classified as available for sale. Debt securities available for sale are carried at fair value with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premium or discount. Premiums or discounts on securities are amortized on the level-yield method without anticipating prepayments. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Management determines the appropriate classification of its investments at the time of purchase and may only change the classification in certain limited circumstances. All transfers between categories are accounted for at fair value. Although the Company currently has the intent and the ability to hold the securities in its investment portfolio to maturity, the securities are all marketable and are currently classified as “available for sale” to allow maximum flexibility with regard to interest rate risk and liquidity management. Management evaluates securities for other-than-temporary impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of the impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis.
FHLB Stock and Other Investments	FHLB Stock and Other Investments The Bank is a member of the Federal Home Loan Bank ("FHLB") system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost in other assets, and periodically evaluated for impairment based on the ultimate recovery of par value. Both cash and stock dividends are reported as income. The Bank’s investment in FHLB stock was approximately $12.4 million at December 31, 2021 and $10.7 million at December 31, 2020. Pursuant to the adoption of ASU 2016-01 on January 1, 2018, the Company elected the measurement alternative for measuring equity securities without readily determinable fair values at cost less impairment, plus or minus observable price changes in orderly transactions. The carrying amount of equity securities without readily determinable fair values is $3.3 million and $2.5 million at December 31, 2021 and 2020, respectively. Equity securities primarily consist of an investment in Pacific Coast Bankers’ Bank (“PCBB”). A remeasurement gain of $0.9 million, $0.4 million and $0.2 million was recorded to income during the years ended December 31, 2021, 2020 and 2019, on PCBB stock. $2.7 million in cumulative remeasurement gains have been recorded as of December 31, 2021 on PCBB stock. Adjustments to the carrying value of PCBB stock were based on a third party valuation.
Loans Held for Sale	Loans Held for Sale The Company may originate loans intended to be sold on the secondary market. Loans originated and intended for sale in the secondary market are carried at cost which approximates fair value since these loans are typically sold shortly after origination. The loan’s cost basis includes unearned deferred fees and costs, and premiums and discounts. If loans held for sale remain on our books for an extended period of time the fair value of those loans is determined using quoted secondary market prices. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Loans that might be held for sale by the Company typically consist of residential real estate loans. Loans classified as held for sale, if any, are disclosed in Note 4 to the consolidated financial statements. Gains and losses on sales of loans are recognized at the time of sale and are calculated based on the difference between the selling price and the allocated book value of loans sold. Book value allocations are determined in accordance with U.S. GAAP. Any inherent risk of loss on loans sold is transferred to the buyer at the date of sale. The Company has issued various representations and warranties associated with the sale of loans. These representations and warranties may require the Company to repurchase loans with underwriting deficiencies as defined per the applicable sales agreements and certain past due loans within 90 days of the sale. The Company did not experience losses during the years ended December 31, 2021, 2020, or 2019 regarding these representations and warranties.
Loans and Leases (Financing Receivables)	Loans and Leases (Financing Receivables) Our credit quality classifications of Loans and Leases include Pass, Special Mention, Substandard and Impaired. These classifications are defined in Note 4 to the consolidated financial statements. Loans and leases that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, purchase premiums and discounts, write-downs, and an allowance for loan and lease losses. Loan and lease origination fees, net of certain deferred origination costs, and purchase premiums and discounts are recognized in interest income as an adjustment to yield of the related loans and leases over the contractual life of the loan using both the effective interest and straight line methods without anticipating prepayments. Interest income for all performing loans, regardless of classification (Pass, Special Mention, Substandard and Impaired), is recognized on an accrual basis, with interest accrued daily. Costs associated with successful loan originations are netted from loan origination fees, with the net amount (net deferred loan fees) amortized over the contractual life of the loan in interest income. If a loan has scheduled periodic payments, the amortization of the net deferred loan fee is calculated using the effective interest method over the contractual life of the loan. If the loan does not have scheduled payments, such as a line of credit, the net deferred loan fee is recognized as interest income on a straight line basis over the contractual life of the loan. Fees received for loan commitments are recognized as interest income over the term of the commitment. When loans are repaid, any remaining unamortized balances of deferred fees and costs are accounted for through interest income. Generally, the Company places a loan or lease on nonaccrual status and ceases recognizing interest income when it has become delinquent more than 90 days and/or when Management determines that the repayment of principal and collection of interest is unlikely. The Company may decide that it is appropriate to continue to accrue interest on certain loans more than 90 days delinquent if they are well-secured by collateral and collection is in process. When a loan is placed on nonaccrual status, any accrued but uncollected interest for the loan is reversed out of interest income in the period in which the loan’s status changed. For loans with an interest reserve, i.e., where loan proceeds are advanced to the borrower to make interest payments, all interest recognized from the inception of the loan is reversed when the loan is placed on non-accrual. Once a loan is on non-accrual status subsequent payments received from the customer are applied to principal, and no further interest income is recognized until the principal has been paid in full or until circumstances have changed such that payments are again consistently received as contractually required. Generally, loans and leases are not restored to accrual status until the obligation is brought current and has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Impaired loans are classified as either nonaccrual or accrual, depending on individual circumstances regarding the collectability of interest and principal according to the contractual terms.
Purchased Credit Impaired Loans	Purchased Credit Impaired Loans The Company purchases individual loans and groups of loans, some of which may show evidence of credit deterioration since origination. These purchased credit impaired (“PCI”) loans are recorded at the amount paid, since there is no carryover of the seller’s allowance for loan and lease losses. After acquisition, additional deterioration in credit is recognized by an increase in the allowance for loan and lease losses. Such PCI loans are accounted for individually or aggregated into pools of loans based on common risk characteristics. The Company estimates the amount and timing of expected cash flows for the loan or pool, and the expected cash flows in excess of amount paid is recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loan’s or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded as a provision for loan and lease losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income
Loans Modified in a Troubled Debt Restructuring	Loans Modified in a Troubled Debt Restructuring Loans are considered to have been modified in a troubled debt restructuring (“TDR”) when due to a borrower’s financial difficulties the Company makes certain concessions to the borrower that it would not otherwise consider. Modifications may include interest rate reductions, principal or interest forgiveness, forbearance, and other actions intended to minimize economic loss and to avoid foreclosure or repossession of collateral. Generally, a non-accrual loan that has been modified in a TDR remains on non-accrual status for a period of six months to demonstrate that the borrower is able to meet the terms of the modified loan. However, performance prior to the modification, or significant events that coincide with the modification, are included in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of loan modification or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains on non-accrual status. A TDR is generally considered to be in default when it appears likely that the customer will not be able to repay all principal and interest pursuant to the terms of the restructured agreement.
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses The allowance for loan and lease losses is maintained at a level which, in management’s judgment, is adequate to absorb loan and lease losses inherent in the loan and lease portfolio. The allowance for loan and lease losses is increased by a provision for loan and lease losses, which is charged to expense, and by principal recovered on charged-off balances. It is reduced by principal charge-offs. The amount of the allowance is based on management’s evaluation of the collectability of the loan and lease portfolio, changes in its risk profile, credit concentrations, historical trends, and economic conditions. This evaluation also considers the balance of impaired loans and leases. A loan or lease is impaired when it is probable that the Company will be unable to collect all contractual principal and interest payments due in accordance with the terms of the loan or lease agreement. The impairment on certain individually identified loans or leases is measured based on the present value of expected future cash flows discounted at the original effective interest rate of the loan or lease. As a practical expedient, impairment may be measured based on the loan’s or lease’s observable market price or the fair value of collateral if the loan or lease is collateral dependent. The amount of impairment, if any, is recorded through the provision for loan and lease losses and is added to the allowance for loan and lease losses, with any changes over time recognized as additional bad debt expense in our provision for loan and lease losses. Impaired loans with homogenous characteristics, such as one-to-four family residential mortgages and consumer installment loans, may be subjected to a collective evaluation for impairment, considering delinquency and repossession statistics, historical loss experience, and other factors. General reserves cover non-impaired loans and are based on historical net loss rates for each portfolio segment by call report code, adjusted for the effects of qualitative or environmental factors that are likely to cause estimated credit losses as of the evaluation date to differ from the portfolio segment’s historical loss experience. Qualitative factors include consideration of the following: changes in lending policies and procedures; changes in international, national, regional, and local economic and business conditions and developments; changes in the nature and volume of the portfolio; changes in the experience, ability and depth of lending management and staff; changes in the volume and severity of past due, nonaccrual and other adversely graded loans; changes in quality of the loan review system; changes in the value of the underlying collateral for collateral-dependent loans; concentrations of credit; and the effect of the other external factors such as competition and legal and regulatory requirements. Most of the Company’s business activity is with customers located in California within the Southern Central San Joaquin Valley; in the corridor stretching between Santa Paula and Santa Clarita in Southern California, and on the Central Coast. Therefore the Company’s exposure to credit risk is significantly affected by changes in the economy in those regions. The Company considers this concentration of credit risk when assessing and assigning qualitative factors in the allowance for loan and lease losses. Portfolio segments identified by the Company include Agricultural, Commercial and Industrial, Real Estate, Small Business Administration, and Consumer loans. Relevant risk characteristics for these portfolio segments generally include debt service coverage, loan-to-value ratios and financial performance on non-consumer loans; and credit scores, debt-to-income ratios, collateral type and loan-to-value ratios for consumer loans. Though management believes the allowance for loan and lease losses to be adequate, ultimate losses may vary from their estimates. However, estimates are reviewed periodically, and as adjustments become necessary they are reported in earnings during the periods they become known. In addition, the FDIC and the California Department of Financial Protection and Innovation, as an integral part of their examination processes, review the allowance for loan and lease losses. These agencies may require additions to the allowance for loan and lease losses based on their judgment about information available at the time of their examinations.
Reserve for Off-Balance Sheet Commitments	Reserve for Off-Balance Sheet Commitments In addition to the exposure to credit loss from outstanding loans, the Company is also exposed to credit loss from certain off-balance sheet commitments such as unused commitments from revolving lines of credit, mortgage warehouse lines of credit, construction loans and commercial and standby letters of credit. Because the available funds have not yet been disbursed on these commitments the estimated losses are not included in the calculation of the ALLL. The reserve for off-balance sheet commitments is an estimated loss contingency which is included in other liabilities on the Consolidated Balance Sheets. The adjustments to the reserve for off-balance sheet commitments are reported within noninterest expense. This reserve is for estimated losses that could occur when the Company is contractually obligated to make a payment under these instruments and must seek repayment from a party that may not be as financially sound in the current period as it was when the commitment was originally made.
Premises and Equipment	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. The useful lives of premises range between twenty-five three Impairment of long-lived assets is evaluated by management based upon an event or changes in circumstances surrounding the underlying assets which indicate long-lived assets may be impaired.
Foreclosed Assets	Foreclosed Assets Foreclosed assets include real estate and other property acquired in full or partial settlement of loan obligations. Upon acquisition, any excess of the recorded investment in the loan balance over the appraised fair market value, net of estimated selling costs, is charged against the allowance for loan and lease losses. A valuation allowance for losses on foreclosed assets is maintained to provide for subsequent declines in value. The allowance is established through a provision for losses on foreclosed assets which is included in other noninterest expense. Subsequent gains or losses on sales or write-downs resulting from permanent impairments are recorded in other noninterest expense as incurred. Operating costs after acquisition are expensed. The Company had one foreclosed residential real estate property recorded at December 31, 2021, as a result of obtaining physical possession of the property. At December 31, 2021, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceeds were in process was $.008 million.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company acquired Sierra National Bank in 2000, Santa Clara Valley Bank in 2014, Coast National Bank in 2016, and Ojai Community Bank and the Woodlake Branch of Citizen’s Business Bank in 2017. Goodwill resulting from business combinations after January 1, 2009 is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but are tested for impairment at least annually or more frequently if events and circumstances exist which indicate that an impairment test should be performed. The Company selected December 31, 2021 as the date to perform the annual impairment test for 2021. Goodwill is the only intangible asset with an indefinite life on our balance sheet. There was no impairment recognized for the years ended December 31, 2021, 2020, and 2019. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. The Company’s other intangible assets consist solely of core deposit intangible assets (CDI’s) arising from the acquisitions of Santa Clara Valley Bank, Coast National Bank, a Citizen’s Business Bank Porterville branch deposit portfolio, Ojai Community Bank, the Woodlake Branch of Citizen’s Business Bank and the Lompoc branch of Santa Maria Community Bank. All of the CDI’s are being amortized on a straight-line basis over eight years, except for the Citizen’s Business Bank Porterville branch deposit portfolio which is being amortized on a straight-line basis over five years.
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded. Details regarding these commitments and financial instruments are discussed in detail in Note 14 to the consolidated financial statements.
Income Taxes	Income Taxes The Company files its income taxes on a consolidated basis with its subsidiary. The allocation of income tax expense represents each entity’s proportionate share of the consolidated provision for income taxes. Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax basis of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely to be realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. We have determined that as of December 31, 2021 all tax positions taken to date are highly certain and, accordingly, no accounting adjustment has been made to the financial statements. The Company recognizes interest and penalties related to uncertain tax positions as part of income tax expense.
Salary Continuation Agreements and Directors' Retirement Plan	Salary Continuation Agreements and Directors’ Retirement Plan The Company has entered into agreements to provide members of the Board of Directors and certain key executives, or their designated beneficiaries, with annual benefits for up to fifteen years after retirement or death. The Company accrues for these future benefits from the effective date of the plan until the director’s or executive’s expected retirement date in a systematic and rational manner. At the consolidated balance sheet date, the amount of accrued benefits equals the then present value of the benefits expected to be provided to the director or employee, any beneficiaries, and covered dependents in exchange for the director’s or employee’s services to that date.
Comprehensive Income	Comprehensive Income Comprehensive income consists of net income and other comprehensive income. Other comprehensive income includes fluctuations in unrealized gains and losses on securities available for sale, net of an adjustment for the effects of realized gains and losses and any applicable tax. Comprehensive income is a more inclusive financial reporting methodology that includes disclosure of other comprehensive income that historically has not been recognized in the calculation of net income. Unrealized gains and losses on the Company’s available for sale securities, net of tax, are included in other comprehensive income after adjusting for the effects of realized gains and losses. Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the consolidated statements of comprehensive income.
Stock-Based Compensation	Stock-Based Compensation At December 31, 2021, the Company had one stock-based compensation plan, the Sierra Bancorp 2017 Stock Incentive Plan (the “2017 Plan”), which was adopted by the Company’s Board of Directors on March 16, 2017 and approved by the Company’s shareholders on May 24, 2017. The 2017 Plan replaced the Company’s 2007 Stock Incentive Plan (the “2007” Plan), which expired by its own terms on March 15, 2017. Options to purchase shares granted under the 2007 Plan that remained outstanding were unaffected by that plan’s termination. The 2017 Plan covers 850,000 shares of the Company’s authorized but unissued common stock, subject to adjustment for stock splits and dividends, and provides for the issuance of both “incentive” and “nonqualified” stock options to salaried officers and employees, and of “nonqualified” stock options to non-employee directors. The 2017 Plan also provides for the issuance of restricted stock awards to these same classes of eligible participants. Compensation cost and director’s expense is recognized for stock options and restricted stock awards issued to employees and directors and is recognized over the required service period, generally defined as the vesting period. The Company is using the Black-Scholes model to estimate the fair value of stock options, while the market price of the Company’s common stock at the date of grant is used for restricted stock awards. The “multiple option” approach for stock options is used to allocate the resulting valuation to actual expense for current period. Expected volatility is based on historical volatility of the Company’s common stock. The Company uses historical data to estimate stock option exercise and post-vesting termination behavior. The expected term of stock options granted is based on historical data and represents the period of time that options granted are expected to be outstanding subsequent to vesting, which takes into account that the options are not transferable. The risk-free interest rate for the expected term of the stock option is based on the U.S. Treasury yield curve in effect at the time of the grant. The fair value of each stock option is estimated on the date of grant using the following assumptions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 Dividend yield ​ 3.02% ​ 2.62% Expected Volatility ​ 25.06% ​ 34.57% Risk-free interest rate ​ 1.47% ​ 2.70% Expected option life ​ 6.4 years ​ 5.4 years ​ No stock options were granted during the year ended December 31, 2021.
Revenue Recognition	Revenue Recognition Revenue from contracts with customers subject to ASC 606 comprises the noninterest income earned by the Company in exchange for services provided to customers. Income associated with customer contracts generally involve transaction prices that are fixed and performance obligations which are satisfied as services are rendered. In most cases recognition occurs within a single financial reporting period as there is little or no judgement involved in the timing of revenues. We generally act in a principal capacity, on our own behalf, in most of our contracts with customers. In such transactions, we recognize revenue and the related costs to provide our services on a gross basis in our financial statements. Service Charges on Deposit Accounts comprise charges on retail and business accounts. Business customers can earn credits depending on account type and deposit balances maintained with the Company, which may be used to offset fees. Fees and credits are based on predetermined, agreed-upon rates. In some cases, we act in an agent capacity, deriving revenue through assisting other entities in transactions with our customers. In such transactions, we recognize revenue and those related costs to provide services on a gross basis in our financial statements. Debit card interchange income is derived from our customers’ use of various interchange and ATM/debit card networks which are the primary sources of revenue generated in an agent capacity.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In September 2016 the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments On March 22, 2020, a statement was issued by our banking regulators and titled the “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus” (the “Interagency Statement”) that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of COVID-19. Additionally, Section 4013 of the CARES Act, that passed on March 27, 2020, further provides that a qualified loan modification is exempt by law from classification as a troubled debt restructuring (“TDR”) as defined by GAAP, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the COVID-19 outbreak declared by the President of the United States under the National Emergencies Act (50 U.S.C. 1601 et seq.) terminates. The Interagency Statement was subsequently revised in April 2020 to clarify the interaction of the original guidance with Section 4013 of the CARES Act, as well as setting forth the banking regulators’ views on consumer protection considerations. In accordance with such guidance, we processed short-term modifications for 311 loans and $424.9 million made in response to COVID-19 to borrowers who were current and otherwise not past due. These include short-term, 180 days or less, modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. See Note 4 for further information on remaining non-TDR loan modifications. The Interagency Guidance and Section 4013 did not have a material impact on the Company’s financial statements. ​

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Schedule of Share-based Compensation, Fair Value Assumptions	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 Dividend yield ​ 3.02% ​ 2.62% Expected Volatility ​ 25.06% ​ 34.57% Risk-free interest rate ​ 1.47% ​ 2.70% Expected option life ​ 6.4 years ​ 5.4 years ​

Securities Available-for-Sale (

Securities Available-for-Sale (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Value of Available-For-Sale Investment Securities	The amortized cost and fair value of the securities available-for-sale are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government agencies ​ $ 1,546 ​ $ 28 ​ $ — ​ $ 1,574 Mortgage-backed securities ​ ​ 303,912 ​ ​ 4,772 ​ ​ (1,957) ​ ​ 306,727 State and political subdivisions ​ ​ 290,729 ​ ​ 13,807 ​ ​ (268) ​ ​ 304,268 Corporate bonds ​ ​ 28,436 ​ ​ 94 ​ ​ (1) ​ ​ 28,529 Collateralized loan obligations ​ ​ 332,836 ​ ​ 68 ​ ​ (688) ​ ​ 332,216 Total securities ​ $ 957,459 ​ $ 18,769 ​ $ (2,914) ​ $ 973,314 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government agencies ​ $ 1,725 ​ $ 75 ​ $ — ​ $ 1,800 Mortgage-backed securities ​ ​ 304,108 ​ ​ 10,389 ​ ​ (62) ​ ​ 314,435 State and political subdivisions ​ ​ 212,011 ​ ​ 15,728 ​ ​ — ​ ​ 227,739 Total securities ​ $ 517,844 ​ $ 26,192 ​ $ (62) ​ $ 543,974
Information Pertaining to Investment Securities Aggregated by Investment Category and Length of Time that Individual Securities in a Continuous Loss Position	At December 31, 2021 and 2020, the Company had 99 and 2 securities with unrealized gross losses, respectively. Information pertaining to these securities aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ Less than twelve months ​ Twelve months or longer ​ Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value U.S. government agencies ​ $ — ​ $ — ​ $ — ​ $ — Mortgage-backed securities ​ ​ (1,797) ​ ​ 107,026 ​ ​ (160) ​ ​ 2,808 State and political subdivisions ​ ​ (268) ​ ​ 30,170 ​ ​ — ​ ​ — Corporate bonds ​ ​ (1) ​ ​ 499 ​ ​ — ​ ​ — Collateralized loan obligations ​ ​ (688) ​ ​ 175,581 ​ ​ — ​ ​ — Total ​ $ (2,754) ​ $ 313,276 ​ $ (160) ​ $ 2,808 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Less than twelve months ​ Twelve months or longer ​ Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value U.S. government agencies ​ $ — ​ $ — ​ $ — ​ $ — Mortgage-backed securities ​ ​ (62) ​ ​ 4,286 ​ ​ — ​ ​ — State and political subdivisions ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total ​ $ (62) ​ $ 4,286 ​ $ — ​ $ —
Realized Gain (Loss) on Investments	Gross gains and losses from the sales and calls of securities for the years ended were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 2019 Gross gains on sales and calls of securities ​ $ 11 ​ $ 433 ​ $ 230 Gross losses on sales and calls of securities ​ ​ — ​ ​ (43) ​ ​ (428) Net gains (losses) on sales and calls of securities ​ $ 11 ​ $ 390 ​ $ (198)
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of securities available-for-sale at December 31, 2021 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because the issuers of the securities may have the right to call or prepay obligations with or without penalties (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ Amortized Cost Fair Value Maturing within one year ​ $ 3,513 ​ $ 3,547 Maturing after one year through five years ​ ​ 26,422 ​ ​ 26,718 Maturing after five years through ten years ​ ​ 36,840 ​ ​ 38,314 Maturing after ten years ​ ​ 253,936 ​ ​ 265,792 Securities not due at a single maturity date: ​ ​ 320,711 ​ ​ 334,371 Mortgage-backed securities ​ ​ 303,912 ​ ​ 306,727 Collateralized loan obligations ​ ​ 332,836 ​ ​ 332,216 ​ ​ $ 957,459 ​ $ 973,314
Summary of Amortized Cost and Fair Values of General Obligation and Revenue Bonds	The following table summarizes the amortized cost and fair values of general obligation and revenue bonds in the Company’s investment securities portfolio at the indicated dates, identifying the state in which the issuing municipality or agency operates for our largest geographic concentrations (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 General obligation bonds Amortized Cost Fair Value Amortized Cost Fair Value State of Issuance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Texas ​ $ 85,045 ​ $ 89,225 ​ $ 76,794 ​ $ 82,888 California ​ ​ 64,092 ​ ​ 67,066 ​ ​ 31,122 ​ ​ 33,100 Washington ​ ​ 23,858 ​ ​ 24,812 ​ ​ 22,896 ​ ​ 25,072 Other (26 and 21 states, respectively) ​ ​ 75,037 ​ ​ 78,579 ​ ​ 51,827 ​ ​ 55,352 Total general obligation bonds ​ ​ 248,032 ​ ​ 259,682 ​ ​ 182,639 ​ ​ 196,412 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Revenue bonds ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ State of Issuance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Texas ​ ​ 7,038 ​ ​ 7,377 ​ ​ 7,023 ​ ​ 7,516 California ​ ​ 1,349 ​ ​ 1,392 ​ ​ 363 ​ ​ 379 Washington ​ ​ 4,334 ​ ​ 4,602 ​ ​ 2,249 ​ ​ 2,406 Other (15 and 14 states, respectively) ​ ​ 29,976 ​ ​ 31,215 ​ ​ 19,737 ​ ​ 21,026 Total revenue bonds ​ ​ 42,697 ​ ​ 44,586 ​ ​ 29,372 ​ ​ 31,327 Total obligations of states and political subdivisions ​ $ 290,729 ​ $ 304,268 ​ $ 212,011 ​ $ 227,739 ​ The following table summarizes the amortized cost and fair value of revenue bonds in the Company’s investment securities portfolio at the indicated dates, identifying the revenue source of repayment for our largest source concentrations (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 Revenue bonds Amortized Cost Fair Value Amortized Cost Fair Value Revenue Source: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Water ​ $ 15,534 ​ $ 16,220 ​ $ 12,609 ​ $ 13,526 Lease ​ ​ 6,556 ​ ​ 6,718 ​ ​ 2,707 ​ ​ 2,773 Sales tax ​ ​ 5,514 ​ ​ 5,842 ​ ​ 3,083 ​ ​ 3,308 Sewer ​ ​ 3,932 ​ ​ 4,165 ​ ​ 4,584 ​ ​ 4,891 Other (9 and 8 sources, respectively) ​ ​ 11,161 ​ ​ 11,641 ​ ​ 6,389 ​ ​ 6,829 Total revenue bonds ​ $ 42,697 ​ $ 44,586 ​ $ 29,372 ​ $ 31,327 ​

Loans and Leases (Tables)

Loans and Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Schedule of Participating Mortgage Loans	The composition of the loan and lease portfolio is as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Real estate: ​ ​ ​ ​ ​ ​ Secured by commercial and professional office properties, including construction and development ​ $ 1,242,633 ​ $ 1,477,677 Secured by residential properties ​ ​ 390,872 ​ ​ 288,341 Secured by farmland ​ ​ 106,706 ​ ​ 129,905 Total real estate loans ​ ​ 1,740,211 ​ ​ 1,895,923 Agricultural ​ ​ 33,990 ​ ​ 44,872 Commercial and industrial ​ ​ 109,791 ​ ​ 209,048 Mortgage warehouse lines ​ ​ 101,184 ​ ​ 307,679 Consumer ​ ​ 4,550 ​ ​ 5,589 Total loans ​ ​ 1,989,726 ​ ​ 2,463,111 Deferred loan and lease origination cost, net ​ ​ (1,865) ​ ​ (3,147) Allowance for loan and lease losses ​ ​ (14,256) ​ ​ (17,738) Loans, net ​ $ 1,973,605 ​ $ 2,442,226
Credit Quality Classifications for Loan Balances	Credit quality classifications as of December 31, 2021 were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Special Mention Substandard Impaired Total Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ 19,669 ​ $ 1,700 ​ $ — ​ $ — ​ $ 21,369 Other construction/land ​ ​ 24,958 ​ ​ — ​ ​ — ​ ​ 341 ​ ​ 25,299 1-4 family - closed-end ​ ​ 282,717 ​ ​ 4,703 ​ ​ 201 ​ ​ 1,836 ​ ​ 289,457 Equity lines ​ ​ 23,277 ​ ​ 615 ​ ​ 55 ​ ​ 2,641 ​ ​ 26,588 Multi-family residential ​ ​ 49,986 ​ ​ 3,472 ​ ​ — ​ ​ — ​ ​ 53,458 Commercial real estate owner occupied ​ ​ 321,996 ​ ​ 6,108 ​ ​ 3,860 ​ ​ 2,482 ​ ​ 334,446 Commercial real estate non-owner occupied ​ ​ 841,728 ​ ​ 26,364 ​ ​ 14,429 ​ ​ 367 ​ ​ 882,888 Farmland ​ ​ 92,479 ​ ​ 10,266 ​ ​ 3,961 ​ ​ — ​ ​ 106,706 Total real estate ​ ​ 1,656,810 ​ ​ 53,228 ​ ​ 22,506 ​ ​ 7,667 ​ ​ 1,740,211 Agricultural ​ ​ 32,513 ​ ​ — ​ ​ 1,099 ​ ​ 378 ​ ​ 33,990 Commercial and industrial ​ ​ 98,367 ​ ​ 9,989 ​ ​ 212 ​ ​ 1,223 ​ ​ 109,791 Mortgage warehouse lines ​ ​ 101,184 ​ ​ — ​ ​ — ​ ​ — ​ ​ 101,184 Consumer loans ​ ​ 4,349 ​ ​ 31 ​ ​ 6 ​ ​ 164 ​ ​ 4,550 Total gross loans and leases ​ $ 1,893,223 ​ $ 63,248 ​ $ 23,823 ​ $ 9,432 ​ $ 1,989,726 ​ Credit quality classifications as of December 31, 2020 were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Special Mention Substandard Impaired Total Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ 40,044 ​ $ 8,521 ​ $ — ​ $ — ​ $ 48,565 Other construction/land ​ ​ 61,809 ​ ​ 7,478 ​ ​ 2,148 ​ ​ 545 ​ ​ 71,980 1-4 family - closed-end ​ ​ 130,559 ​ ​ 4,922 ​ ​ 1,356 ​ ​ 2,999 ​ ​ 139,836 Equity lines ​ ​ 30,479 ​ ​ 2,581 ​ ​ 58 ​ ​ 4,957 ​ ​ 38,075 Multi-family residential ​ ​ 57,934 ​ ​ 3,597 ​ ​ — ​ ​ 334 ​ ​ 61,865 Commercial real estate owner occupied ​ ​ 308,819 ​ ​ 21,148 ​ ​ 5,652 ​ ​ 7,580 ​ ​ 343,199 Commercial real estate non-owner occupied ​ ​ 1,026,041 ​ ​ 10,827 ​ ​ 25,048 ​ ​ 582 ​ ​ 1,062,498 Farmland ​ ​ 104,826 ​ ​ 21,468 ​ ​ 3,169 ​ ​ 442 ​ ​ 129,905 Total real estate ​ ​ 1,760,511 ​ ​ 80,542 ​ ​ 37,431 ​ ​ 17,439 ​ ​ 1,895,923 Agricultural ​ ​ 39,391 ​ ​ 3,617 ​ ​ 1,614 ​ ​ 250 ​ ​ 44,872 Commercial and industrial ​ ​ 194,876 ​ ​ 11,819 ​ ​ 1,259 ​ ​ 1,094 ​ ​ 209,048 Mortgage warehouse lines ​ ​ 307,679 ​ ​ — ​ ​ — ​ ​ — ​ ​ 307,679 Consumer loans ​ ​ 5,323 ​ ​ 58 ​ ​ 11 ​ ​ 197 ​ ​ 5,589 Total gross loans and leases ​ $ 2,307,780 ​ $ 96,036 ​ $ 40,315 ​ $ 18,980 ​ $ 2,463,111
Allowance for Credit Losses on Financing Receivables	The following tables present the activity in the allowance for loan and lease losses and the recorded investment in loans and impairment method by portfolio segment for each of the years ending December 31, 2021, 2020, and 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real Estate Agricultural Industrial (1) Consumer Unallocated Total Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, December 31, 2018 ​ $ 5,831 ​ ​ 256 ​ ​ 2,394 ​ ​ 1,239 ​ ​ 30 ​ ​ 9,750 Charge-offs ​ ​ (1,190) ​ ​ — ​ ​ (1,274) ​ ​ (2,409) ​ ​ — ​ ​ (4,873) Recoveries ​ ​ 647 ​ ​ — ​ ​ 690 ​ ​ 1,159 ​ ​ — ​ ​ 2,496 Provision ​ ​ 347 ​ ​ (63) ​ ​ 875 ​ ​ 1,289 ​ ​ 102 ​ ​ 2,550 Balance, December 31, 2019 ​ ​ 5,635 ​ ​ 193 ​ ​ 2,685 ​ ​ 1,278 ​ ​ 132 ​ ​ 9,923 Charge-offs ​ ​ — ​ ​ — ​ ​ (436) ​ ​ (1,397) ​ ​ — ​ ​ (1,833) Recoveries ​ ​ 87 ​ ​ — ​ ​ 129 ​ ​ 882 ​ ​ — ​ ​ 1,098 Provision ​ ​ 6,044 ​ ​ 289 ​ ​ 2,343 ​ ​ (43) ​ ​ (83) ​ ​ 8,550 Balance, December 31, 2020 ​ ​ 11,766 ​ ​ 482 ​ ​ 4,721 ​ ​ 720 ​ ​ 49 ​ ​ 17,738 Charge-offs ​ ​ (245) ​ ​ (50) ​ ​ (159) ​ ​ (946) ​ ​ — ​ ​ (1,400) Recoveries ​ ​ 601 ​ ​ — ​ ​ 223 ​ ​ 744 ​ ​ — ​ ​ 1,568 Benefit ​ ​ (536) ​ ​ 32 ​ ​ (3,226) ​ ​ (8) ​ ​ 88 ​ ​ (3,650) Balance, December 31, 2021 ​ $ 11,586 ​ $ 464 ​ $ 1,559 ​ $ 510 ​ $ 137 ​ $ 14,256 (1) Includes mortgage warehouse lines ​ Loans evaluated for impairment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 December 31, 2019 ​ Individually Collectively Individually Collectively Individually Collectively Real estate ​ $ 7,667 ​ $ 1,732,544 ​ $ 17,439 ​ $ 1,878,484 ​ $ 12,745 ​ $ 1,389,368 Agricultural ​ ​ 378 ​ ​ 33,612 ​ ​ 250 ​ ​ 44,622 ​ ​ 5 ​ ​ 48,031 Commercial and industrial (1) ​ ​ 1,223 ​ ​ 209,752 ​ ​ 1,094 ​ ​ 515,633 ​ ​ 977 ​ ​ 303,658 Consumer ​ ​ 164 ​ ​ 4,386 ​ ​ 197 ​ ​ 5,392 ​ ​ 426 ​ ​ 7,355 Total loans ​ $ 9,432 ​ $ 1,980,294 ​ $ 18,980 ​ $ 2,444,131 ​ $ 14,153 ​ $ 1,748,412 (1) Includes mortgage warehouse lines ​ Reserves based on method of evaluation for impairment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 ​ December 31, 2019 ​ Specific General Specific General Specific General Real estate ​ $ 428 ​ $ 10,983 ​ $ 525 ​ $ 11,241 ​ $ 493 ​ $ 5,142 Agricultural ​ ​ 244 ​ ​ 217 ​ ​ 250 ​ ​ 232 ​ ​ 1 ​ ​ 192 Commercial and industrial (1) ​ ​ 127 ​ ​ 1,405 ​ ​ 202 ​ ​ 4,519 ​ ​ 219 ​ ​ 2,466 Consumer ​ ​ 19 ​ ​ 487 ​ ​ 19 ​ ​ 701 ​ ​ 114 ​ ​ 1,164 Unallocated ​ ​ — ​ ​ 346 ​ ​ — ​ ​ 49 ​ ​ — ​ ​ 132 Total loan loss reserves ​ $ 818 ​ $ 13,438 ​ $ 996 ​ $ 16,742 ​ $ 827 ​ $ 9,096 (1) Includes mortgage warehouse lines
Aging of Loan Balances by Number of Days Past Due	The following tables present the recorded investment in nonaccrual loans and loans past due over 30 days as of December 31, 2021 and December 31, 2020 (dollars in thousands, except footnotes): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ 30-59 Days ​ 60-89 Days ​ 90 Days Or More Past ​ ​ ​ ​ ​ ​ ​ Total Financing ​ Non-Accrual ​ Past Due Past Due Due (2) Total Past Due Current Receivables Loans (1) Real Estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 21,369 ​ $ 21,369 ​ $ — Other construction/land ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 25,299 ​ ​ 25,299 ​ ​ — 1-4 family - closed-end ​ ​ 1,532 ​ ​ 132 ​ ​ — ​ ​ 1,664 ​ ​ 287,793 ​ ​ 289,457 ​ ​ 1,023 Equity lines ​ ​ 30 ​ ​ — ​ ​ — ​ ​ 30 ​ ​ 26,558 ​ ​ 26,588 ​ ​ 892 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 53,458 ​ ​ 53,458 ​ ​ — Commercial real estate owner occupied ​ ​ 124 ​ ​ — ​ ​ 698 ​ ​ 822 ​ ​ 333,624 ​ ​ 334,446 ​ ​ 1,234 Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 882,888 ​ ​ 882,888 ​ ​ — Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 106,706 ​ ​ 106,706 ​ ​ — Total real estate loans ​ ​ 1,686 ​ ​ 132 ​ ​ 698 ​ ​ 2,516 ​ ​ 1,737,695 ​ ​ 1,740,211 ​ ​ 3,149 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ 284 ​ ​ 284 ​ ​ 33,706 ​ ​ 33,990 ​ ​ 378 Commercial and industrial ​ ​ 473 ​ ​ — ​ ​ 283 ​ ​ 756 ​ ​ 109,035 ​ ​ 109,791 ​ ​ 973 Mortgage warehouse lines ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 101,184 ​ ​ 101,184 ​ ​ — Consumer loans ​ ​ 6 ​ ​ 3 ​ ​ — ​ ​ 9 ​ ​ 4,541 ​ ​ 4,550 ​ ​ 22 Total gross loans and leases ​ $ 2,165 ​ $ 135 ​ $ 1,265 ​ $ 3,565 ​ $ 1,986,161 ​ $ 1,989,726 ​ $ 4,522 (1) Included in Total Financing Receivables (2) As of December 31, 2021 there were no loans over 90 days past due and still accruing. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ 30-59 Days ​ 60-89 Days ​ 90 Days Or More Past ​ ​ ​ ​ ​ ​ ​ Total Financing ​ Non-Accrual ​ Past Due Past Due Due (2) Total Past Due Current Receivables Loans (1) Real Estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 48,565 ​ $ 48,565 ​ $ — Other construction/land ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 71,980 ​ ​ 71,980 ​ ​ — 1-4 family - closed-end ​ ​ 210 ​ ​ 37 ​ ​ 150 ​ ​ 397 ​ ​ 139,439 ​ ​ 139,836 ​ ​ 1,193 Equity lines ​ ​ 1,409 ​ ​ — ​ ​ 551 ​ ​ 1,960 ​ ​ 36,115 ​ ​ 38,075 ​ ​ 2,403 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 61,865 ​ ​ 61,865 ​ ​ — Commercial real estate owner occupied ​ ​ 101 ​ ​ 1,187 ​ ​ 78 ​ ​ 1,366 ​ ​ 341,833 ​ ​ 343,199 ​ ​ 1,678 Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ 152 ​ ​ 152 ​ ​ 1,062,346 ​ ​ 1,062,498 ​ ​ 582 Farmland ​ ​ — ​ ​ 211 ​ ​ 442 ​ ​ 653 ​ ​ 129,252 ​ ​ 129,905 ​ ​ 442 Total real estate loans ​ ​ 1,720 ​ ​ 1,435 ​ ​ 1,373 ​ ​ 4,528 ​ ​ 1,891,395 ​ ​ 1,895,923 ​ ​ 6,298 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ 250 ​ ​ 250 ​ ​ 44,622 ​ ​ 44,872 ​ ​ 250 Commercial and industrial ​ ​ 325 ​ ​ — ​ ​ 237 ​ ​ 562 ​ ​ 208,486 ​ ​ 209,048 ​ ​ 1,026 Mortgage warehouse lines ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 307,679 ​ ​ 307,679 ​ ​ — Consumer loans ​ ​ 38 ​ ​ — ​ ​ — ​ ​ 38 ​ ​ 5,551 ​ ​ 5,589 ​ ​ 24 Total gross loans and leases ​ $ 2,083 ​ $ 1,435 ​ $ 1,860 ​ $ 5,378 ​ $ 2,457,733 ​ $ 2,463,111 ​ $ 7,598 (1) Included in Total Financing Receivables (2) As of December 31, 2020 there were no loans over 90 days past due and still accruing.
Impaired Financing Receivables	Individually impaired loans as of December 31, 2021, December 31, 2020 and December 31, 2019 were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ ​ Unpaid Principal ​ Recorded ​ ​ ​ Average Recorded ​ Interest Income ​ Balance (1) Investment (2) Related Allowance Investment Recognized (3) With an Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ 341 ​ $ 341 ​ $ 64 ​ $ 352 ​ $ 55 1-4 family - closed-end ​ ​ 1,048 ​ ​ 1,048 ​ ​ 37 ​ ​ 1,096 ​ ​ 104 Equity lines ​ ​ 2,005 ​ ​ 1,993 ​ ​ 182 ​ ​ 2,056 ​ ​ 138 Commercial real estate - owner occupied ​ ​ 1,249 ​ ​ 1,248 ​ ​ 19 ​ ​ 1,278 ​ ​ 144 Commercial real estate - non-owner occupied ​ ​ 367 ​ ​ 367 ​ ​ 126 ​ ​ 393 ​ ​ 32 Total real estate ​ ​ 5,010 ​ ​ 4,997 ​ ​ 428 ​ ​ 5,175 ​ ​ 473 Agricultural ​ ​ 244 ​ ​ 244 ​ ​ 244 ​ ​ 246 ​ ​ — Commercial and industrial ​ ​ 757 ​ ​ 757 ​ ​ 127 ​ ​ 873 ​ ​ 41 Consumer loans ​ ​ 164 ​ ​ 164 ​ ​ 19 ​ ​ 180 ​ ​ 28 ​ ​ ​ 6,175 ​ ​ 6,162 ​ ​ 818 ​ ​ 6,474 ​ ​ 542 With no Related Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family - closed-end ​ ​ 788 ​ ​ 788 ​ ​ — ​ ​ 869 ​ ​ — Equity lines ​ ​ 648 ​ ​ 648 ​ ​ — ​ ​ 690 ​ ​ 6 Commercial real estate - owner occupied ​ ​ 1,353 ​ ​ 1,234 ​ ​ — ​ ​ 1,282 ​ ​ — Total real estate ​ ​ 2,789 ​ ​ 2,670 ​ ​ — ​ ​ 2,841 ​ ​ 6 Agricultural ​ ​ 134 ​ ​ 134 ​ ​ — ​ ​ 186 ​ ​ — Commercial and industrial ​ ​ 466 ​ ​ 466 ​ ​ — ​ ​ 550 ​ ​ — ​ ​ ​ 3,389 ​ ​ 3,270 ​ ​ — ​ ​ 3,577 ​ ​ 6 Total ​ $ 9,564 ​ $ 9,432 ​ $ 818 ​ $ 10,051 ​ $ 548 (1) Contractual principal balance due from customer. (2) Principal balance on Company’s books, less any direct charge offs. (3) Interest income is recognized on performing balances on a regular accrual basis. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Unpaid Principal ​ Recorded ​ ​ ​ Average Recorded ​ Interest Income ​ Balance (1) Investment (2) Related Allowance Investment Recognized (3) With an Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ 545 ​ $ 545 ​ $ 171 ​ $ 565 ​ $ 40 1-4 family - closed-end ​ ​ 2,078 ​ ​ 2,077 ​ ​ 51 ​ ​ 2,141 ​ ​ 104 Equity lines ​ ​ 2,875 ​ ​ 2,875 ​ ​ 233 ​ ​ 2,989 ​ ​ 98 Multifamily residential ​ ​ 334 ​ ​ 334 ​ ​ 16 ​ ​ 343 ​ ​ 23 Commercial real estate- owner occupied ​ ​ 6,076 ​ ​ 6,076 ​ ​ 54 ​ ​ 6,135 ​ ​ 226 Total real estate ​ ​ 11,908 ​ ​ 11,907 ​ ​ 525 ​ ​ 12,173 ​ ​ 491 Agricultural ​ ​ 250 ​ ​ 250 ​ ​ 250 ​ ​ 250 ​ ​ — Commercial and industrial ​ ​ 945 ​ ​ 935 ​ ​ 202 ​ ​ 1,152 ​ ​ 6 Consumer loans ​ ​ 235 ​ ​ 197 ​ ​ 19 ​ ​ 221 ​ ​ 16 ​ ​ ​ 13,338 ​ ​ 13,289 ​ ​ 996 ​ ​ 13,796 ​ ​ 513 With no Related Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ ​ 114 ​ ​ — ​ ​ — ​ ​ 5 ​ ​ — 1-4 family - closed-end ​ ​ 942 ​ ​ 922 ​ ​ — ​ ​ 960 ​ ​ — Equity Lines ​ ​ 2,160 ​ ​ 2,082 ​ ​ — ​ ​ 2,127 ​ ​ 3 Commercial real estate- owner occupied ​ ​ 1,624 ​ ​ 1,504 ​ ​ — ​ ​ 1,590 ​ ​ — Commercial real estate- non-owner occupied ​ ​ 582 ​ ​ 582 ​ ​ — ​ ​ 617 ​ ​ — Farmland ​ ​ 442 ​ ​ 442 ​ ​ — ​ ​ 446 ​ ​ — Total real estate ​ ​ 5,864 ​ ​ 5,532 ​ ​ — ​ ​ 5,745 ​ ​ 3 Commercial and industrial ​ ​ 189 ​ ​ 159 ​ ​ — ​ ​ 165 ​ ​ — Consumer loans ​ ​ 5 ​ ​ — ​ ​ — ​ ​ 5 ​ ​ 2 ​ ​ ​ 6,058 ​ ​ 5,691 ​ ​ — ​ ​ 5,915 ​ ​ 5 Total ​ $ 19,396 ​ $ 18,980 ​ $ 996 ​ $ 19,711 ​ $ 518 (1) Contractual principal balance due from customer. (2) Principal balance on Company’s books, less any direct charge offs. (3) Interest income is recognized on performing balances on a regular accrual basis. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid Principal ​ Recorded ​ ​ ​ Average Recorded ​ Interest Income ​ Balance (1) Investment (2) Related Allowance Investment Recognized (3) With an Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ 656 ​ $ 537 ​ $ 157 ​ $ 563 ​ $ 32 1-4 family - closed-end ​ ​ 2,298 ​ ​ 2,298 ​ ​ 58 ​ ​ 2,365 ​ ​ 146 Equity lines ​ ​ 4,173 ​ ​ 4,120 ​ ​ 252 ​ ​ 4,185 ​ ​ 200 Multifamily residential ​ ​ 353 ​ ​ 353 ​ ​ 17 ​ ​ 361 ​ ​ 23 Commercial real estate- owner occupied ​ ​ 593 ​ ​ 593 ​ ​ 6 ​ ​ 606 ​ ​ 38 Farmland ​ ​ 237 ​ ​ 237 ​ ​ 3 ​ ​ 256 ​ ​ — Total real estate ​ ​ 8,310 ​ ​ 8,138 ​ ​ 493 ​ ​ 8,336 ​ ​ 439 Agricultural ​ ​ 5 ​ ​ 5 ​ ​ 1 ​ ​ 6 ​ ​ — Commercial and industrial ​ ​ 915 ​ ​ 896 ​ ​ 219 ​ ​ 1,140 ​ ​ 29 Consumer loans ​ ​ 464 ​ ​ 426 ​ ​ 114 ​ ​ 469 ​ ​ 35 ​ ​ ​ 9,694 ​ ​ 9,465 ​ ​ 827 ​ ​ 9,951 ​ ​ 503 With no Related Allowance Recorded ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ ​ 52 ​ ​ 17 ​ ​ — ​ ​ 577 ​ ​ 4 1-4 family - closed-end ​ ​ 755 ​ ​ 722 ​ ​ — ​ ​ 726 ​ ​ — Equity Lines ​ ​ 326 ​ ​ 301 ​ ​ — ​ ​ 310 ​ ​ 5 Commercial real estate- owner occupied ​ ​ 1,560 ​ ​ 1,440 ​ ​ — ​ ​ 1,477 ​ ​ — Commercial real estate- non-owner occupied ​ ​ 3,295 ​ ​ 2,105 ​ ​ — ​ ​ 3,267 ​ ​ — Farmland ​ ​ 22 ​ ​ 22 ​ ​ — ​ ​ 25 ​ ​ — Total real estate ​ ​ 6,010 ​ ​ 4,607 ​ ​ — ​ ​ 6,382 ​ ​ 9 Commercial and industrial ​ ​ 102 ​ ​ 81 ​ ​ — ​ ​ 162 ​ ​ — Consumer loans ​ ​ 9 ​ ​ — ​ ​ — ​ ​ 140 ​ ​ 15 ​ ​ ​ 6,121 ​ ​ 4,688 ​ ​ — ​ ​ 6,684 ​ ​ 24 Total ​ $ 15,815 ​ $ 14,153 ​ $ 827 ​ $ 16,635 ​ $ 527 ​ (1) Contractual principal balance due from customer. (2) Principal balance on Company’s books, less any direct charge offs. (3) Interest income is recognized on performing balances on a regular accrual basis. ​
Schedule of Loans and Leases Receivable Impaired Interest Income and Lost from Non Accrual Loans	The following is a summary of interest income from non-accrual loans in the portfolio at year-end that was not recognized (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, Non-accrual loans 2021 2020 2019 Interest that would have been recorded under the loans’ original terms ​ $ 406 ​ $ 605 ​ $ 650 Less gross interest recorded ​ ​ 33 ​ ​ 201 ​ ​ 289 Foregone interest ​ $ 373 ​ $ 404 ​ $ 361
Troubled Debt Restructurings, by Type of Loan Modification	The following tables present troubled debt restructurings by type of modification during the period ending December 31, 2021, December 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ Rate ​ Term ​ Interest Only ​ Rate & Term ​ ​ Term & Interest ​ ​ ​ ​ Modification Modification Modification Modification ​ Modification ​ Total Troubled debt restructurings ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — Other construction/land ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 1-4 family - closed-end ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ ​ — ​ ​ 1,000 ​ ​ — ​ ​ 83 ​ ​ — ​ ​ 1,083 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate owner occupied ​ ​ — ​ ​ 136 ​ ​ — ​ ​ — ​ ​ — ​ ​ 136 Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ — ​ ​ 1,136 ​ ​ — ​ ​ 83 ​ ​ — ​ ​ 1,219 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ 118 ​ ​ — ​ ​ — ​ ​ — ​ ​ 118 Commercial and industrial ​ ​ — ​ ​ 185 ​ ​ — ​ ​ — ​ ​ — ​ ​ 185 Consumer loans ​ ​ — ​ ​ 44 ​ ​ — ​ ​ — ​ ​ 23 ​ ​ 67 Small Business Administration Loans ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ $ — ​ $ 1,483 ​ $ — ​ $ 83 ​ $ 23 ​ $ 1,589 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Rate ​ Term ​ Interest Only ​ Rate & Term ​ ​ Term & Interest ​ ​ ​ ​ Modification Modification Modification Modification ​ Modification ​ Total Troubled debt restructurings ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ — ​ $ 85 ​ $ — ​ $ — ​ $ — ​ $ 85 1-4 family - closed-end ​ ​ — ​ ​ 1,325 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,325 Equity lines ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate owner occupied ​ ​ — ​ ​ 5,515 ​ ​ — ​ ​ — ​ ​ 338 ​ ​ 5,853 Commercial real estate non-owner occupied ​ ​ — ​ ​ 443 ​ ​ — ​ ​ — ​ ​ — ​ ​ 443 Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ — ​ ​ 7,368 ​ ​ — ​ ​ — ​ ​ 338 ​ ​ 7,706 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ ​ — ​ ​ 143 ​ ​ — ​ ​ — ​ ​ — ​ ​ 143 Consumer loans ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ $ — ​ $ 7,511 ​ $ — ​ $ — ​ $ 338 ​ $ 7,849 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Rate ​ Term ​ Interest Only ​ Rate & Term ​ ​ Term & Interest ​ ​ ​ ​ Modification Modification Modification Modification ​ Modification ​ Total Troubled debt restructurings ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ $ — ​ $ 163 ​ $ — ​ $ — ​ $ — ​ $ 163 1-4 family - closed-end ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ ​ — ​ ​ 344 ​ ​ — ​ ​ — ​ ​ — ​ ​ 344 Multi-family residential ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate non-owner occupied ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ — ​ ​ 507 ​ ​ — ​ ​ — ​ ​ — ​ ​ 507 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ ​ 94 ​ ​ 255 ​ ​ — ​ ​ 52 ​ ​ — ​ ​ 401 Consumer loans ​ ​ — ​ ​ 9 ​ ​ — ​ ​ 50 ​ ​ — ​ ​ 59 ​ ​ $ 94 ​ $ 771 ​ $ — ​ $ 102 ​ $ — ​ $ 967
Schedule of Debtor Troubled Debt Restructuring, Subsequent Periods	The following tables present loans by class modified as troubled debt restructurings including any subsequent defaults during the period ending December 31, 2021, December 31, 2020 and December 31, 2019 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Outstanding ​ ​ ​ ​ ​ Number of ​ Recorded ​ Recorded ​ Reserve December 31, 2021 Loans Investment Investment Difference (1) Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1-4 family residential construction ​ — ​ $ — ​ $ — ​ $ — Other construction/land ​ — ​ ​ — ​ ​ — ​ ​ — 1-4 family - closed-end ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ 2 ​ ​ 1,083 ​ ​ 1,083 ​ ​ — Multi-family residential ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - owner occupied ​ 1 ​ ​ 137 ​ ​ 136 ​ ​ (1) Commercial real estate - non-owner occupied ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ ​ ​ 1,220 ​ ​ 1,219 ​ ​ (1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ 1 ​ ​ 118 ​ ​ 118 ​ ​ 116 Commercial and industrial ​ 1 ​ ​ 185 ​ ​ 185 ​ ​ (1) Consumer loans ​ 3 ​ ​ 67 ​ ​ 67 ​ ​ 2 Small Business Administration Loans ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ ​ ​ $ 1,590 ​ $ 1,589 ​ $ 116 (1) This represents the increase or (decrease) in the allowance for loans and lease losses reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan and lease loss methodology. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Outstanding ​ ​ ​ ​ ​ Number of ​ Recorded ​ Recorded ​ Reserve December 31, 2020 Loans Investment Investment Difference (1) Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ 1 ​ $ 86 ​ $ 85 ​ $ 40 1-4 family - closed-end ​ 1 ​ ​ 1,325 ​ ​ 1,325 ​ ​ 10 Equity lines ​ — ​ ​ — ​ ​ — ​ ​ — Multi-family residential ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - owner occupied ​ 4 ​ ​ 5,853 ​ ​ 5,853 ​ ​ 8 Commercial real estate - non-owner occupied ​ 1 ​ ​ 443 ​ ​ 443 ​ ​ — Farmland ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ ​ ​ 7,707 ​ ​ 7,706 ​ ​ 58 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ 3 ​ ​ 143 ​ ​ 143 ​ ​ 3 Consumer loans ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ ​ ​ $ 7,850 ​ $ 7,849 ​ $ 61 (1) This represents the increase or (decrease) in the allowance for loans and lease losses reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan and lease loss methodology. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Outstanding ​ ​ ​ ​ ​ Number of ​ Recorded ​ Recorded ​ Reserve December 31, 2019 Loans Investment Investment Difference (1) Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other construction/land ​ 1 ​ $ 163 ​ $ 163 ​ $ 74 1-4 family - closed-end ​ — ​ ​ — ​ ​ — ​ ​ — Equity lines ​ 2 ​ ​ 344 ​ ​ 344 ​ ​ — Multi-family residential ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - owner occupied ​ — ​ ​ — ​ ​ — ​ ​ — Commercial real estate - non-owner occupied ​ — ​ ​ — ​ ​ — ​ ​ — Farmland ​ — ​ ​ — ​ ​ — ​ ​ — Total real estate loans ​ ​ ​ ​ 507 ​ ​ 507 ​ ​ 74 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ — ​ ​ — ​ ​ — ​ ​ — Commercial and industrial ​ 7 ​ ​ 401 ​ ​ 401 ​ ​ (59) Consumer loans ​ 2 ​ ​ 59 ​ ​ 59 ​ ​ (47) ​ ​ ​ ​ $ 967 ​ $ 967 ​ $ (32) (1) This represents the increase or (decrease) in the allowance for loans and lease losses reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan and lease loss methodology. ​
Nonperforming Financial Instruments [Member]
Schedule of Debtor Troubled Debt Restructuring, Subsequent Periods	The carrying amount and unpaid principal balance of those loans are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ Unpaid Principal Balance Carrying Value Real estate secured ​ $ 60 ​ $ 60 Total purchased credit impaired loans ​ $ 60 ​ $ 60 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Unpaid Principal Balance Carrying Value Real estate secured ​ $ 78 ​ $ 78 Total purchased credit impaired loans ​ $ 78 ​ $ 78

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Premises and equipment at cost consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Land ​ $ 4,823 ​ $ 5,751 Buildings and improvements ​ ​ 21,006 ​ ​ 21,580 Furniture, fixtures and equipment ​ ​ 19,242 ​ ​ 20,705 Leasehold improvements ​ ​ 14,682 ​ ​ 15,226 ​ ​ ​ 59,753 ​ ​ 63,262 ​ ​ ​ ​ ​ ​ ​ Less accumulated depreciation and amortization ​ ​ 36,182 ​ ​ 35,757 ​ ​ $ 23,571 ​ $ 27,505

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Schedule of Maturities for Operating Lease Liabilities - ASC 842	Future undiscounted lease payments for operating leases with initial terms of one year or more as of December 31, 2021 are as follows (dollars in thousands): ​ ​ ​ ​ ​ Year Ending December 31, ​ ​ ​ 2022 $ 1,909 2023 ​ ​ 1,403 2024 ​ ​ 1,057 2025 ​ ​ 782 2026 ​ ​ 479 Thereafter ​ ​ 1,722 Total undiscounted lease payments ​ $ 7,352 Less: imputed interest ​ ​ (1,143) Net lease liabilities ​ $ 6,209

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of rollforward of goodwill	The rollforward of goodwill for each of the preceding three years is included in the table below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2021 2020 2019 Balance at January 1 ​ $ 27,357 ​ $ 27,357 ​ $ 27,357 Acquired goodwill ​ ​ — ​ ​ — ​ ​ — Impairment ​ ​ — ​ ​ — ​ ​ — Balance at December 31 ​ $ 27,357 ​ $ 27,357 ​ $ 27,357
Schedule of acquired intangible assets	Acquired intangible assets were as follows at year-end (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2021 ​ 2020 ​ Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Core deposit intangibles ​ $ 8,401 ​ $ 5,126 ​ $ 8,401 ​ $ 4,094
Schedule of estimated amortization expense for each of the next five years and thereafter	Estimated amortization expense for each of the next five years and thereafter (dollars in thousands): ​ ​ ​ ​ 2022 $ 1,000 2023 ​ ​ 876 2024 ​ ​ 781 2025 ​ ​ 566 2026 ​ ​ 52 Thereafter ​ ​ — ​ ​ $ 3,275

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Other Assets [Abstract]
Schedule of Other Assets	Other assets consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Accrued interest receivable ​ $ 11,246 ​ $ 16,074 Deferred tax assets ​ ​ 3,792 ​ ​ 839 Investment in qualified affordable housing projects ​ ​ 2,940 ​ ​ 3,473 Investment in limited partnerships ​ ​ 1,655 ​ ​ 1,848 Federal Home Loan Bank stock, at cost ​ ​ 12,393 ​ ​ 10,727 Other ​ ​ 26,003 ​ ​ 17,485 ​ ​ $ 58,029 ​ $ 50,446

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Schedule Of Maturities Of Times Deposit	Aggregate annual maturities of time deposits were as follows (dollars in thousands): ​ ​ ​ ​ Year Ending December 31, ​ ​ ​ 2022 $ 294,284 2023 ​ ​ 31,227 2024 ​ ​ 26,051 2025 ​ ​ 1,254 2026 ​ ​ 309 Thereafter ​ ​ 772 ​ ​ $ 353,897
Schedule Of Interest Expense Recognized In Interest Bearing Deposit	Interest expense recognized on interest-bearing deposits consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Interest bearing demand deposits ​ $ 331 ​ $ 278 ​ $ 316 NOW ​ ​ 444 ​ ​ 388 ​ ​ 524 Savings ​ ​ 240 ​ ​ 221 ​ ​ 308 Money market ​ ​ 111 ​ ​ 128 ​ ​ 181 Time deposits ​ ​ 1,039 ​ ​ 2,687 ​ ​ 8,931 Brokered Deposits ​ ​ 225 ​ ​ 246 ​ ​ 1,120 ​ ​ $ 2,390 ​ $ 3,948 ​ $ 11,380

Other Borrowing Arrangements (T

Other Borrowing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Short-term Debt	At year end, short-term borrowings consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ Average balance outstanding Amount Average interest rate during the year Maximum month-end balance during the year Weighted average interest rate at year-end As of December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Repurchase agreements ​ $ 70,443 ​ $ 106,937 ​ 0.30% ​ $ 106,937 ​ 0.30% Short term borrowings ​ ​ 5,186 ​ ​ — ​ 0.06% ​ ​ 5,000 ​ — ​ ​ $ 75,629 ​ $ 106,937 ​ ​ ​ $ 111,937 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ ​ Average balance outstanding Amount Average interest rate during the year Maximum month-end balance during the year Weighted average interest rate at year-end As of December 31: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Repurchase agreements ​ $ 34,614 ​ $ 39,138 ​ 0.40% ​ $ 41,449 ​ 0.40% Short term borrowings ​ ​ 53,593 ​ ​ 142,900 ​ 0.19% ​ ​ 195,100 ​ 0.12% ​ ​ $ 88,207 ​ $ 182,038 ​ ​ ​ $ 236,549 ​ ​

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	At year-end, long-term debt was as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ ​ 2020 ​ ​ ​ Principal ​ ​ Unamortized Debt Issuance Costs ​ ​ Principal ​ ​ Unamortized Debt Issuance Costs Fixed - floating rate subordinated debentures, due 2031 (1) ​ $ 50,000 ​ $ (859) ​ $ — ​ $ — ​ ​ $ 50,000 ​ $ (859) ​ $ — ​ $ — (1) 3.25% fixed rate for five years then floating rate at 253.5 basis points over 3-month term SOFR. ​

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The provision for income taxes follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Federal: ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 8,186 ​ $ 7,979 ​ $ 7,081 Deferred ​ ​ 135 ​ ​ (1,697) ​ ​ (228) ​ ​ ​ 8,321 ​ ​ 6,282 ​ ​ 6,853 State: ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ ​ 5,916 ​ ​ 5,711 ​ ​ 4,771 Deferred ​ ​ (50) ​ ​ (914) ​ ​ 133 ​ ​ ​ 5,866 ​ ​ 4,797 ​ ​ 4,904 ​ ​ $ 14,187 ​ $ 11,079 ​ $ 11,757 ​
Schedule of Deferred Tax Assets and Liabilities	The components of the net deferred tax asset, included in other assets, are as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Deferred tax assets: ​ ​ ​ ​ ​ ​ Allowance for loan and lease losses ​ $ 4,215 ​ $ 5,244 Foreclosed assets ​ ​ 126 ​ ​ 126 Deferred compensation ​ ​ 4,511 ​ ​ 4,147 Accrued reserves ​ ​ 555 ​ ​ 325 Non-accrual loans ​ ​ 363 ​ ​ 403 Lease liability ​ ​ 1,752 ​ ​ 2,283 Loan fair value adjustment ​ ​ 420 ​ ​ 956 Capital losses carried forward ​ ​ — ​ ​ 29 Net operating losses ​ ​ 1,592 ​ ​ 1,751 State income tax deduction ​ ​ 1,179 ​ ​ 1,170 Other ​ ​ 992 ​ ​ 986 Total deferred tax assets ​ ​ 15,705 ​ ​ 17,420 Deferred tax liabilities: ​ ​ ​ ​ ​ ​ Deferred loan costs ​ ​ (1,288) ​ ​ (2,482) Right-of-use asset ​ ​ (1,618) ​ ​ (2,127) Intangibles ​ ​ (579) ​ ​ (832) Premises and equipment ​ ​ (917) ​ ​ (750) Net unrealized gain on securities available-for-sale ​ ​ (4,687) ​ ​ (7,725) Other ​ ​ (2,824) ​ ​ (2,665) Total deferred tax liabilities ​ ​ (11,913) ​ ​ (16,581) Net deferred tax assets ​ $ 3,792 ​ $ 839 ​
Schedule of Effective Income Tax Rate Reconciliation	The expense for income taxes differs from amounts computed by applying the statutory Federal income tax rates to income before income taxes. The significant items comprising these differences consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Income tax expense at federal statutory rate ​ $ 12,012 ​ $ 9,770 ​ $ 10,021 Increase (decrease) resulting from: ​ ​ ​ ​ ​ ​ ​ ​ ​ State franchise tax expense, net of federal tax effect ​ ​ 4,634 ​ ​ 3,790 ​ ​ 3,872 Tax exempt municipal income ​ ​ (1,306) ​ ​ (1,199) ​ ​ (952) Affordable housing tax credits ​ ​ (524) ​ ​ (518) ​ ​ (538) Excess tax benefit of stock-based compensation ​ ​ (109) ​ ​ (90) ​ ​ (133) Cash surrender value - life insurance ​ ​ (556) ​ ​ — ​ ​ — Other ​ ​ 36 ​ ​ (674) ​ ​ (513) ​ ​ $ 14,187 ​ $ 11,079 ​ $ 11,757 Effective tax rate ​ ​ 24.80% ​ ​ 23.81% ​ ​ 24.64% ​

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Financial Instruments Representing Off-Balance-Sheet Credit Risk	The following financial instruments represent off-balance-sheet credit risk (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 Fixed-rate commitments to extend credit ​ $ 72,946 ​ $ 75,291 Variable-rate commitments to extend credit ​ $ 481,082 ​ $ 366,525 Standby letters of credit ​ $ 6,651 ​ $ 8,104 ​

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Stockholders' Equity Note [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	A reconciliation of the numerators and denominators of the basic and diluted earnings per share computations is as follows (dollars in thousands, except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Years Ended December 31, ​ 2021 2020 2019 Basic Earnings Per Share ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income (dollars in thousands) ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 Weighted average shares outstanding ​ ​ 15,241,957 ​ ​ 15,216,749 ​ ​ 15,311,113 Basic earnings per share ​ $ 2.82 ​ $ 2.33 ​ $ 2.35 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted Earnings Per Share ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income (dollars in thousands) ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 Weighted average shares outstanding ​ ​ 15,241,957 ​ ​ 15,216,749 ​ ​ 15,311,113 Effect of dilutive stock options ​ ​ 111,488 ​ ​ 63,576 ​ ​ 125,998 Weighted average shares outstanding ​ ​ 15,353,445 ​ ​ 15,280,325 ​ ​ 15,437,111 Diluted earnings per share ​ $ 2.80 ​ $ 2.32 ​ $ 2.33
Schedule of Options Indexed to Issuer Equity	Information related to stock options during each year follows (dollars in thousands, except per share data): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 2019 Weighted-average grant-date fair value per share ​ $ — ​ $ 4.76 ​ $ 6.60 Total intrinsic value of stock options exercised ​ $ 346 ​ $ 705 ​ $ 1,150 Total fair value of stock options vested ​ $ 418 ​ $ 489 ​ $ 438
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the Company’s stock option activity follows (shares in thousands, except exercise price): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ Shares Weighted Average Exercise Price Aggregate Intrinsic Value (1) Shares Weighted Average Exercise Price Shares Weighted Average Exercise Price Outstanding, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning of year ​ 495 ​ $ 23.67 ​ ​ ​ ​ 458 ​ $ 21.08 ​ 453 ​ $ 18.45 Exercised or released ​ (33) ​ $ 14.64 ​ ​ ​ ​ (67) ​ $ 11.65 ​ (83) ​ $ 13.07 Granted ​ — ​ $ — ​ ​ ​ ​ 126 ​ $ 27.11 ​ 102 ​ $ 26.97 Canceled ​ (45) ​ $ 26.36 ​ ​ ​ ​ (21) ​ $ 26.01 ​ (14) ​ $ 26.77 Expired ​ (1) ​ $ 10.58 ​ ​ ​ ​ (1) ​ $ 10.73 ​ — ​ $ — Outstanding, end of year ​ 416 ​ $ 24.15 ​ $ 1,338 ​ 495 ​ $ 23.67 ​ 458 ​ $ 21.08 Exercisable, end of year (2) ​ 355 ​ $ 23.62 ​ $ 1,336 ​ 324 ​ $ 21.97 ​ 322 ​ $ 18.89 (1) The aggregate intrinsic value of stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on December 31, 2021. This amount changes based on changes in the market value of the Company’s stock. (2) The weighted average remaining contractual life of stock options outstanding and exercisable on December 31, 2021 was 5.9 years and 5.6 years, respectively.
Summary of Nonvested Restricted Stock Shares	A summary of the Company’s nonvested shares for the year follows (shares in thousands, except grant date fair value): ​ ​ ​ ​ ​ ​ Nonvested Shares ​ Shares ​ ​ Weighted Average Grant-Date Fair Value Nonvested at January 1, 2021 ​ 149 ​ $ 18.00 Granted ​ 74 ​ ​ 26.66 Vested ​ (40) ​ ​ 18.00 Forfeited ​ (18) ​ ​ 18.22 Nonvested at December 31, 2021 ​ 165 ​ $ 21.85

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2021
Banking And Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	Actual and required capital amounts (dollars in thousands) and ratios are presented below at year end. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Actual ​ To Be Well Capitalized Under Prompt Corrective Action Regulations (CBLR Framework) 2021 Capital Amount Ratio Capital Amount Ratio Tier 1 (Core) Capital to average total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sierra Bancorp and subsidiary ​ $ 356,800 ​ 10.43% ​ $ 290,851 ​ 8.50% Bank of the Sierra ​ $ 387,059 ​ 11.31% ​ $ 290,817 ​ 8.50% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Actual ​ To Be Well Capitalized Under Prompt Corrective Action Regulations 2020 Capital Amount Ratio Capital Amount Ratio Tier 1 (Core) Capital to average total assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sierra Bancorp and subsidiary ​ $ 330,200 ​ 10.50% ​ $ 251,595 ​ 8.00% Bank of the Sierra ​ ​ 318,194 ​ 10.12% ​ ​ 251,572 ​ 8.00% ​

Noninterest Income (Tables)

Noninterest Income (Tables)	12 Months Ended
	Dec. 31, 2021
Non-Interest Revenue [Abstract]
Schedule of Other Nonoperating Income (Expense)	Noninterest income also includes one general category of “other income” of which the following are major components (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Included in other income: ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of limited partnerships ​ $ (524) ​ $ (1,189) ​ $ (2,079) Dividends on equity investments ​ ​ 737 ​ ​ 664 ​ ​ 789 Unrealized gains recognized on equity investments ​ ​ 857 ​ ​ 447 ​ ​ 232 Other ​ ​ 4,019 ​ ​ 4,638 ​ ​ 3,223 Total other noninterest income ​ $ 5,089 ​ $ 4,560 ​ $ 2,165

Other Noninterest Expense (Tabl

Other Noninterest Expense (Tables)	12 Months Ended
	Dec. 31, 2021
Other Income and Expenses [Abstract]
Schedule of Other Operating Cost and Expense, by Component	Other noninterest expense consisted of the following (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Legal, audit and professional ​ $ 7,652 ​ $ 4,263 ​ $ 4,039 Data processing ​ ​ 5,890 ​ ​ 4,661 ​ ​ 4,564 Advertising and promotional ​ ​ 1,521 ​ ​ 1,889 ​ ​ 2,568 Deposit services ​ ​ 9,049 ​ ​ 8,483 ​ ​ 7,962 Stationery and supplies ​ ​ 345 ​ ​ 446 ​ ​ 318 Telephone and data communication ​ ​ 2,013 ​ ​ 1,775 ​ ​ 1,529 Loan and credit card processing ​ ​ 501 ​ ​ 879 ​ ​ 675 Foreclosed assets expense (income), net ​ ​ 72 ​ ​ 253 ​ ​ 35 Postage ​ ​ 308 ​ ​ 321 ​ ​ 436 Other ​ ​ 2,780 ​ ​ 2,205 ​ ​ 2,082 Assessments ​ ​ 1,157 ​ ​ 717 ​ ​ 525 Total other noninterest expense ​ $ 31,288 ​ $ 25,892 ​ $ 24,733

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Summary of the Aggregate Activity Involving Related Party Borrowers	During the normal course of business, the Bank enters into loans with related parties, including executive officers and directors. These loans are made with substantially the same terms, including rates and collateral, as loans to unrelated parties. The following is a summary of the aggregate activity involving related party borrowers (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 2019 Balance, beginning of year ​ $ 1,794 ​ $ 2,731 ​ $ 2,544 Disbursements ​ ​ 1,983 ​ ​ 7,114 ​ ​ 18,681 Amounts repaid ​ ​ (2,548) ​ ​ (8,051) ​ ​ (18,494) Effect of changes in composition of related parties ​ ​ (162) ​ ​ — ​ ​ — Balance, end of year ​ $ 1,067 ​ $ 1,794 ​ $ 2,731 Undisbursed commitments to related parties ​ $ 2,156 ​ $ 2,635 ​ $ 1,829

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of assets reported at fair value on a recurring basis	Assets and liabilities measured at fair value on a recurring basis are summarized below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2021, using ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Realized Gain/(Loss) Securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ $ — ​ $ 1,574 ​ $ — ​ $ 1,574 ​ $ — Mortgage-backed securities ​ ​ — ​ ​ 306,727 ​ ​ — ​ ​ 306,727 ​ ​ — State and political subdivisions ​ ​ — ​ ​ 304,268 ​ ​ — ​ ​ 304,268 ​ ​ — Corporate bonds ​ ​ — ​ ​ 999 ​ ​ 27,530 ​ ​ 28,529 ​ ​ — Collateralized loan obligations ​ ​ — ​ ​ 136,509 ​ ​ 195,707 ​ ​ 332,216 ​ ​ — Total available-for-sale securities ​ $ — ​ $ 750,077 ​ $ 223,237 ​ $ 973,314 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at December 31, 2020, using ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Realized Gain/(Loss) Securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ $ — ​ $ 1,800 ​ $ — ​ $ 1,800 ​ $ — Mortgage-backed securities ​ ​ — ​ ​ 314,435 ​ ​ — ​ ​ 314,435 ​ ​ — State and political subdivisions ​ ​ — ​ ​ 227,739 ​ ​ — ​ ​ 227,739 ​ ​ — Total available-for-sale securities ​ $ — ​ $ 543,974 ​ $ — ​ $ 543,974 ​ $ — ​
Reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)	The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31, 2021 and 2020 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collateralized Loan Obligations Corporate Bonds ​ ​ 2021 ​ 2020 ​ 2021 ​ 2020 Balance of recurring Level 3 assets at January 1, ​ $ — ​ $ — ​ $ — ​ $ — Purchases ​ ​ 195,707 ​ ​ — ​ ​ 27,530 ​ ​ — Balance of recurring Level 3 assets at December 31, ​ $ 195,707 ​ $ — ​ $ 27,530 ​ $ — ​
Schedule of assets reported at fair value on a nonrecurring basis	Assets and liabilities measured at fair market value on a non-recurring basis are summarized below (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Collateral dependent impaired loans ​ $ — ​ $ 221 ​ $ 177 ​ $ 398 Foreclosed assets ​ $ — ​ $ 93 ​ $ — ​ $ 93 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Collateral dependent impaired loans ​ $ — ​ $ 550 ​ $ — ​ $ 550 Foreclosed assets ​ $ — ​ $ 971 ​ $ — ​ $ 971 ​
Schedule of quantitative information about level 3 fair value measurements	The following table presents quantitative information about recurring level 3 fair value measurements at December 31, 2021 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Range ​ Fair Value ​ Valuation Technique(s) Unobservable Input(s) ​ Min ​ Max ​ Weighted Average Corporate Bonds ​ $ 27,530 ​ New issue pricing ​ Risk appetite ​ N/A ​ N/A ​ N/A ​ ​ ​ ​ ​ Secondary market pricing ​ Market volatility ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit quality of issuer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit spread ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collateralized Loan Obligations ​ ​ 195,707 ​ New issue pricing ​ Constant prepayment rate ​ N/A ​ N/A ​ N/A ​ ​ ​ ​ ​ Secondary market pricing ​ Default rate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit quality of issuer ​ Recovery rate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Credit spread ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 223,237 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The following table presents quantitative information about level 3 fair value measurements for assets measured at fair value on a non-recurring basis at December 31, 2021 (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Range ​ Fair Value ​ Valuation Technique(s) Unobservable Input(s) ​ Min ​ Max ​ Weighted Average Impaired loans - commercial and industrial ​ $ 177 ​ Fair value of collateral ​ Collateral discount ​ 50% ​ 70% ​ 56% ​ ​ $ 177 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Disclosures about Fair Value _2

Disclosures about Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of carrying amount and estimated fair values of financial instruments	Carrying amount and estimated fair values of financial instruments were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ ​ ​ ​ ​ Estimated Fair Value ​ Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Financial Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 257,528 ​ $ 257,528 ​ $ — ​ $ — ​ $ 257,528 Securities available for sale ​ ​ 973,314 ​ ​ — ​ ​ 750,077 ​ ​ 223,237 ​ ​ 973,314 Loans and leases held for investment ​ ​ 1,973,207 ​ ​ — ​ ​ — ​ ​ 1,960,966 ​ ​ 1,960,966 Collateral dependent impaired loans ​ ​ 398 ​ ​ — ​ ​ 221 ​ ​ 177 ​ ​ 398 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noninterest bearing ​ $ 1,084,544 ​ $ 1,084,544 ​ $ — ​ $ — ​ $ 1,084,544 Interest bearing ​ ​ 1,697,028 ​ ​ — ​ ​ 1,696,124 ​ ​ — ​ ​ 1,696,124 Repurchase agreements ​ ​ 106,937 ​ ​ — ​ ​ 106,937 ​ ​ — ​ ​ 106,937 Long-term borrowings ​ ​ 49,141 ​ ​ — ​ ​ 49,118 ​ ​ — ​ ​ 49,118 Subordinated debentures ​ ​ 35,302 ​ ​ — ​ ​ 33,281 ​ ​ — ​ ​ 33,281 ​ Carrying amount and estimated fair values of financial instruments were as follows (dollars in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ ​ ​ ​ ​ Estimated Fair Value ​ Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Financial Assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 71,417 ​ $ 71,417 ​ $ — ​ $ — ​ $ 71,417 Securities available for sale ​ ​ 543,974 ​ ​ — ​ ​ 543,974 ​ ​ — ​ ​ 543,974 Loans and leases held for investment ​ ​ 2,441,676 ​ ​ — ​ ​ — ​ ​ 2,450,340 ​ ​ 2,450,340 Collateral dependent impaired loans ​ ​ 550 ​ ​ — ​ ​ 550 ​ ​ — ​ ​ 550 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noninterest bearing ​ $ 943,664 ​ $ 943,664 ​ $ — ​ $ — ​ $ 943,664 Interest bearing ​ ​ 1,680,942 ​ ​ — ​ ​ 1,680,814 ​ ​ — ​ ​ 1,680,814 Fed funds purchased and repurchase agreements ​ ​ 39,138 ​ ​ — ​ ​ 39,138 ​ ​ — ​ ​ 39,138 Short-term borrowings ​ ​ 142,900 ​ ​ — ​ ​ 142,896 ​ ​ — ​ ​ 142,896 Subordinated debentures ​ ​ 35,124 ​ ​ — ​ ​ 24,364 ​ ​ — ​ ​ 24,364 ​

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Sources of Non-interest Income	twelve months ended December 31, 2021 and 2020. Items outside the scope of ASC 606 are noted as such (dollars in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2021 2020 Noninterest income ​ ​ ​ ​ ​ ​ Service charges on deposits ​ ​ ​ ​ ​ ​ Returned item and overdraft fees ​ $ 4,924 ​ $ 5,078 Other service charges on deposits ​ ​ 6,922 ​ ​ 6,687 Debit card interchange income ​ ​ 8,485 ​ ​ 7,023 Loss on limited partnerships (1) ​ ​ (524) ​ ​ (1,189) Dividends on equity investments (1) ​ ​ 737 ​ ​ 664 Unrealized gains recognized on equity investments (1) ​ ​ 857 ​ ​ 447 Net gains (losses) on sale of securities (1) ​ ​ 11 ​ ​ 390 Other (1) ​ ​ 6,667 ​ ​ 7,050 Total noninterest income ​ $ 28,079 ​ $ 26,150 ​ ​ ​ ​ ​ ​ ​ Noninterest expense ​ ​ ​ ​ ​ ​ Salaries and employee benefits (1) ​ $ 42,431 ​ $ 40,178 Occupancy expense (1) ​ ​ 9,837 ​ ​ 9,842 Gains on sale of OREO ​ ​ (153) ​ ​ (10) Other (1) ​ ​ 31,441 ​ ​ 25,902 Total noninterest expense ​ $ 83,556 ​ $ 75,912 (1) Not within the scope of ASC 606. Revenue streams are not related to contracts with customers and are accounted for on an accrual basis under other provisions of GAAP.

Parent Only Condensed Financi_2

Parent Only Condensed Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Schedule of Condensed Balance Sheet	BALANCE SHEETS Years Ended December 31, 2021 and 2020 (dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 ASSETS ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 20,143 ​ $ 12,000 Investments in bank subsidiary ​ ​ 428,054 ​ ​ 367,014 Investment in trust subsidiaries ​ ​ 1,145 ​ ​ 1,145 Other assets ​ ​ 21 ​ ​ 22 ​ ​ $ 449,363 ​ $ 380,181 ​ ​ ​ ​ ​ ​ ​ LIABILITIES AND SHAREHOLDERS' EQUITY ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ Other liabilities ​ $ 2,426 ​ $ 1,161 Long-term debt ​ ​ 49,141 ​ ​ — Subordinated debentures ​ ​ 35,302 ​ ​ 35,124 Total liabilities ​ ​ 86,869 ​ ​ 36,285 Shareholders' equity: ​ ​ ​ ​ ​ ​ Common stock ​ ​ 116,917 ​ ​ 117,120 Retained earnings ​ ​ 234,410 ​ ​ 208,371 Accumulated other comprehensive gain, net of taxes ​ ​ 11,167 ​ ​ 18,405 Total shareholders' equity ​ ​ 362,494 ​ ​ 343,896 ​ ​ $ 449,363 ​ $ 380,181
Schedule of Condensed Income Statement	STATEMENTS OF INCOME Years Ended December 31, 2021, 2020 and 2019 (dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 2019 Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividend from subsidiary ​ $ 3,200 ​ $ 23,000 ​ $ 17,200 Other operating income ​ ​ — ​ ​ 43 ​ ​ — Total income ​ ​ 3,200 ​ ​ 23,043 ​ ​ 17,200 Expense ​ ​ ​ ​ ​ ​ ​ ​ ​ Salaries and employee benefits ​ ​ 779 ​ ​ 856 ​ ​ 582 Other expenses ​ ​ 2,728 ​ ​ 1,971 ​ ​ 2,664 Total expenses ​ ​ 3,507 ​ ​ 2,827 ​ ​ 3,246 Income before income taxes ​ ​ (307) ​ ​ 20,216 ​ ​ 13,954 Income tax benefit ​ ​ (1,037) ​ ​ (823) ​ ​ (1,138) Income before equity in undistributed income of subsidiary ​ ​ 730 ​ ​ 21,039 ​ ​ 15,092 Equity in undistributed income of subsidiary ​ ​ 42,282 ​ ​ 14,405 ​ ​ 20,869 Net income ​ $ 43,012 ​ $ 35,444 ​ $ 35,961
Schedule of Condensed Cash Flow Statement	STATEMENTS OF CASH FLOWS Years Ended December 31, 2021, 2020 and 2019 (dollars in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 2020 2019 Cash flows from operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 43,012 ​ $ 35,444 ​ $ 35,961 Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Undistributed net income of subsidiary ​ ​ (42,282) ​ ​ (14,405) ​ ​ (20,869) Decrease in other assets ​ ​ 179 ​ ​ 178 ​ ​ 178 Increase (decrease) in other liabilities ​ ​ 1,263 ​ ​ (41) ​ ​ (2) Net cash provided by operating activities ​ ​ 2,172 ​ ​ 21,176 ​ ​ 15,268 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Investment in subsidiary ​ ​ (25,000) ​ ​ — ​ ​ — Net cash used by investing activities ​ ​ (25,000) ​ ​ — ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock options exercised ​ ​ 282 ​ ​ 775 ​ ​ 1,088 Repurchase of common stock ​ ​ (5,220) ​ ​ (2,562) ​ ​ (2,544) Dividends paid ​ ​ (13,232) ​ ​ (12,207) ​ ​ (11,332) Issuance of debentures, net ​ ​ 49,141 ​ ​ — ​ ​ — Net cash provided by (used) in financing activities ​ ​ 30,971 ​ ​ (13,994) ​ ​ (12,788) Net increase in cash and cash equivalents ​ ​ 8,143 ​ ​ 7,182 ​ ​ 2,480 Cash and cash equivalents, beginning of year ​ ​ 12,000 ​ ​ 4,818 ​ ​ 2,338 Cash and cash equivalents, end of year ​ $ 20,143 ​ $ 12,000 ​ $ 4,818

Condensed Quarterly Results o_2

Condensed Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Schedule of Results of Operations Activities Disclosure	The following table sets forth the Company’s unaudited results of operations for the four quarters of 2021 and 2020. In management’s opinion, the results of operations reflect all adjustments (which include only recurring adjustments) necessary to present fairly the condensed results for such periods (dollars in thousands, except per share data). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 Quarter Ended ​ December 31, September 30, June 30, March 31, Interest income ​ $ 27,897 ​ $ 27,629 ​ $ 28,092 ​ $ 29,458 Interest expense ​ ​ 1,331 ​ ​ 913 ​ ​ 903 ​ ​ 903 Net interest income ​ ​ 26,566 ​ ​ 26,716 ​ ​ 27,189 ​ ​ 28,555 Provision for loan and lease losses ​ ​ (1,200) ​ ​ (600) ​ ​ (2,100) ​ ​ 250 Noninterest income ​ ​ 7,103 ​ ​ 7,534 ​ ​ 6,612 ​ ​ 6,830 Noninterest expense ​ ​ 22,175 ​ ​ 20,875 ​ ​ 20,235 ​ ​ 20,271 Net income before taxes ​ ​ 12,694 ​ ​ 13,975 ​ ​ 15,666 ​ ​ 14,864 Provision for taxes ​ ​ 3,073 ​ ​ 3,370 ​ ​ 3,958 ​ ​ 3,786 Net income ​ $ 9,621 ​ $ 10,605 ​ $ 11,708 ​ $ 11,078 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted earnings per share ​ $ 0.63 ​ $ 0.69 ​ $ 0.76 ​ $ 0.72 Cash dividend per share ​ $ 0.22 ​ $ 0.22 ​ $ 0.21 ​ $ 0.21 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Quarter Ended ​ December 31, September 30, June 30, March 31, Interest income ​ $ 29,762 ​ $ 29,044 ​ $ 25,386 ​ $ 26,051 Interest expense ​ ​ 930 ​ ​ 970 ​ ​ 1,244 ​ ​ 2,264 Net interest income ​ ​ 28,832 ​ ​ 28,074 ​ ​ 24,142 ​ ​ 23,787 Provision for loan and lease losses ​ ​ 2,200 ​ ​ 2,350 ​ ​ 2,200 ​ ​ 1,800 Noninterest income ​ ​ 6,040 ​ ​ 7,104 ​ ​ 6,900 ​ ​ 6,106 Noninterest expense ​ ​ 20,757 ​ ​ 19,304 ​ ​ 18,033 ​ ​ 17,818 Net income before taxes ​ ​ 11,915 ​ ​ 13,524 ​ ​ 10,809 ​ ​ 10,275 Provision for taxes ​ ​ 2,936 ​ ​ 3,169 ​ ​ 2,506 ​ ​ 2,468 Net income ​ $ 8,979 ​ $ 10,355 ​ $ 8,303 ​ $ 7,807 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted earnings per share ​ $ 0.58 ​ $ 0.68 ​ $ 0.54 ​ $ 0.52 Cash dividend per share ​ $ 0.20 ​ $ 0.20 ​ $ 0.20 ​ $ 0.20

The Business of Sierra Bancorp

The Business of Sierra Bancorp (Details)	Dec. 31, 2021item
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of full service branch offices	35

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - FHLB Stock and Other Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Federal Home Loan Bank stock, at cost	$ 12,393	$ 10,727
Carrying amount of equity securities without readily determinable fair values	3,300	2,500
Remeasurement gain	900	$ 400	$ 200
Cumulative remeasurement gain	$ 2,700

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Loans Held for Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Losses on representations and warranties associated with sale of loans	$ 0	$ 0	$ 0

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Purchased Credit Impaired Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2021
Building and Building Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Building and Building Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	39 years
Furniture and Fixtures [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Foreclosed Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)item	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Financing Receivable Impaired [Line Items]
Number of foreclosed residential real estate properties | item	1
Proceeds from sales of foreclosed assets	$ 950	$ 2,445	$ 7,955
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Proceeds from sales of foreclosed assets	$ 8

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets - Impairment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Asset Impairment [Abstract]
Goodwill and intangible asset impairment	$ 0	$ 0	$ 0

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets - Useful Lives (Details) - Core Deposits [Member]	12 Months Ended
	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Citizen's Business Bank Porterville Branch [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Stock-Based Compensation - General Information (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	0	126,000	102,000
2017 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	850,000

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Stock-Based Compensation - Fair Value Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield (as a percent)	3.02%	2.62%
Expected Volatility (as a percent)	25.06%	34.57%
Risk-free interest rate (as a percent)	1.47%	2.70%
Expected option life	6 years 4 months 24 days	5 years 4 months 24 days

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Recent Accounting Pronouncements - General Information (Details)	Jan. 01, 2022	Dec. 31, 2021
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Jan. 1, 2018
Accounting Standards Update 2016-13 [Member] | Subsequent Event [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 1, 2022

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Recent Accounting Pronouncements - Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable, Net Amount [Abstract]
Allowance for loan and lease losses		$ 14,256	$ 17,738
Subsequent Event [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Increase (decrease) in reserves for unfunded commitments	$ 900
Accounting Standards Update 2016-13 [Member] | Restatement Adjustment [Member] | Subsequent Event [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Allowance for loan and lease losses	$ 10,400

Summary of Significant Accou_15

Summary of Significant Accounting Policies - COVID-19 (Details) - COVID-19 [Member] $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)loan
Unusual Risk or Uncertainty [Line Items]
Financing Receivable, Modifications, Number of Contracts, Not Treated as Troubled Debt Restructurings | loan	311
Financing Receivable, Modification, Not Treated Troubled Debt Restructuring | $	$ 424.9

Securities Available-for-Sale -

Securities Available-for-Sale - Amortized Cost and Estimated Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 957,459	$ 517,844
Gross Unrealized Gains	18,769	26,192
Gross Unrealized Losses	(2,914)	(62)
Estimated Fair Value	973,314	543,974
U.S. Government Agencies [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	1,546	1,725
Gross Unrealized Gains	28	75
Estimated Fair Value	1,574	1,800
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	303,912	304,108
Gross Unrealized Gains	4,772	10,389
Gross Unrealized Losses	(1,957)	(62)
Estimated Fair Value	306,727	314,435
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	290,729	212,011
Gross Unrealized Gains	13,807	15,728
Gross Unrealized Losses	(268)
Estimated Fair Value	304,268	$ 227,739
Corporate Bond [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	28,436
Gross Unrealized Gains	94
Gross Unrealized Losses	(1)
Estimated Fair Value	28,529
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	332,836
Gross Unrealized Gains	68
Gross Unrealized Losses	(688)
Estimated Fair Value	$ 332,216

Securities Available-for-Sale_2

Securities Available-for-Sale - Proceeds from Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale [Abstract]
Proceeds from sales of securities available for sale	$ 148	$ 20,298	$ 60,510

Securities Available-for-Sale_3

Securities Available-for-Sale - Realized Gains (Losses) - Tabular Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]
Gross gains on sales, calls and maturities of securities available for sale	$ 11	$ 433	$ 230
Gross losses on sales, calls and maturities of securities available for sale		(43)	(428)
Net gains on sale of securities available for sale	$ 11	$ 390	$ (198)

Securities Available-for-Sale_4

Securities Available-for-Sale - Realized Gains (Losses) - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security	Dec. 31, 2019USD ($)security
Gross gains on sales and calls of securities	$ 11	$ 433	$ 230
Available-for-sale Securities, Gross Realized Losses		43	$ 428
Securities available-for-sale	957,459	517,844
Investment securities available for sale	$ 973,314	$ 543,974
U.S. Government Agencies [Member]
Number Of Securities With Realized Gross Gains | security	21	60	74
Gross gains on sales and calls of securities	$ 10	$ 430	$ 200
Number Of Securities With Unrealized Gross Losses | security	0
Securities available-for-sale	$ 1,546	1,725
Investment securities available for sale	1,574	$ 1,800
Other Securities [Member]
Number Of Securities With Unrealized Gross Losses | security		9	108
Available-for-sale Securities, Gross Realized Losses		$ 40	$ (400)
States And Political Subdivisions [Member]
Investment securities available for sale	$ 304,300

Securities Available-for-Sale_5

Securities Available-for-Sale - Gross Unrealized Losses - General Information (Details) - security	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total	99	2

Securities Available-for-Sale_6

Securities Available-for-Sale - Gross Unrealized Losses - Tabular Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	$ (2,754)	$ (62)
Fair Value, Less than twelve months	313,276	4,286
Gross Unrealized Losses, Twelve months or more	(160)
Fair Value, Twelve months or more	2,808
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(1,797)	(62)
Fair Value, Less than twelve months	107,026	$ 4,286
Gross Unrealized Losses, Twelve months or more	(160)
Fair Value, Twelve months or more	2,808
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(268)
Fair Value, Less than twelve months	30,170
Corporate Bond [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(1)
Fair Value, Less than twelve months	499
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(688)
Fair Value, Less than twelve months	$ 175,581

Securities Available-for-Sale_7

Securities Available-for-Sale - Estimated Fair Value of Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Maturing within one year, Amortized Cost	$ 3,513
Maturing after one year through five years, Amortized Cost	26,422
Maturing after five years through ten years, Amortized Cost	36,840
Maturing after ten years, Amortized Cost	253,936
Securities due at a single maturity date, Amortized Cost	320,711
Amortized Cost	957,459	$ 517,844
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Maturing within one year, Fair Value	3,547
Maturing after one year through five years, Fair Value	26,718
Maturing after five years through ten years, Fair Value	38,314
Maturing after ten years, Fair Value	265,792
Securities due at a single maturity date, Fair Value	334,371
Fair Value, Total	973,314	543,974
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Securities not due at a single maturity date, Amortized Cost	303,912
Amortized Cost	303,912	304,108
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Securities not due at a single maturity date, Fair Value	306,727
Fair Value, Total	306,727	$ 314,435
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Securities not due at a single maturity date, Amortized Cost	332,836
Amortized Cost	332,836
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Securities not due at a single maturity date, Fair Value	332,216
Fair Value, Total	$ 332,216

Securities Available-for-Sale_8

Securities Available-for-Sale - Securities Pledged (Details) - Other Contractual Obligations And Short Term Borrowing Arrangements [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pledged Financial Instruments, Not Separately Reported, Securities, Total	$ 166.3	$ 224.1
Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value, Total	$ 167.2	$ 232

Securities Available-for-Sale_9

Securities Available-for-Sale - Revenue and General Obligation Bonds (Details) $ in Thousands	Dec. 31, 2021USD ($)securitystateitem	Dec. 31, 2020USD ($)
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale	$ 973,314	$ 543,974
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale	$ 304,268	227,739
Investment Portfolio, Securities Issued, Municipalities and Agencies, Number | item	335
Investment Portfolio, Securities Issued, States, Number | state	33
States and Political Subdivisions [Member] | Various Township Facilities, Charter Township of Washington [Member]
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale	$ 4,000
Investment Portfolio, Securities Issued, Bonds, Number | security	3
General Obligation Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale	$ 259,682	$ 196,412

Securities Available-for-Sal_10

Securities Available-for-Sale - Revenue and General Obligation Bonds by Location (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 957,459	$ 517,844
Fair Market Value	973,314	543,974
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	290,729	212,011
Fair Market Value	304,268	227,739
General Obligation Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	248,032	182,639
Fair Market Value	259,682	196,412
General Obligation Bonds [Member] | TEXAS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	85,045	76,794
Fair Market Value	89,225	82,888
General Obligation Bonds [Member] | CALIFORNIA
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	64,092	31,122
Fair Market Value	67,066	33,100
General Obligation Bonds [Member] | WASHINGTON
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,858	22,896
Fair Market Value	24,812	25,072
General Obligation Bonds [Member] | Other [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	75,037	51,827
Fair Market Value	78,579	55,352
Revenue Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	42,697	29,372
Fair Market Value	44,586	31,327
Revenue Bonds [Member] | TEXAS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,038	7,023
Fair Market Value	7,377	7,516
Revenue Bonds [Member] | CALIFORNIA
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,349	363
Fair Market Value	1,392	379
Revenue Bonds [Member] | WASHINGTON
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,334	2,249
Fair Market Value	4,602	2,406
Revenue Bonds [Member] | Other [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,976	19,737
Fair Market Value	$ 31,215	$ 21,026

Securities Available-for-Sal_11

Securities Available-for-Sale - Revenue Bonds by Type (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 957,459	$ 517,844
Fair Market Value	973,314	543,974
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	290,729	212,011
Fair Market Value	304,268	227,739
Revenue Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	42,697	29,372
Fair Market Value	44,586	31,327
Revenue Bonds [Member] | Water [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,534	12,609
Fair Market Value	16,220	13,526
Revenue Bonds [Member] | Sewer [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,932	4,584
Fair Market Value	4,165	4,891
Revenue Bonds [Member] | Sales Tax [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,514	3,083
Fair Market Value	5,842	3,308
Revenue Bonds [Member] | Lease [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,556	2,707
Fair Market Value	6,718	2,773
Revenue Bonds [Member] | Other Revenue Source [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,161	6,389
Fair Market Value	$ 11,641	$ 6,829

Loans and Leases - Schedule of

Loans and Leases - Schedule of Participating Mortgage Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans, net
Gross loans and leases	$ 1,989,726	$ 2,463,111
Deferred loan and lease origination (fee) cost, net	(1,865)	(3,147)
Allowance for loan and lease losses	(14,256)	(17,738)
Loans, net	1,973,605	2,442,226
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Loans, net
Gross loans and leases	1,740,211	1,895,923
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate [Member]
Loans, net
Gross loans and leases	1,242,633	1,477,677
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Residential Real Estate [Member]
Loans, net
Gross loans and leases	390,872	288,341
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farm Land Real Estate [Member]
Loans, net
Gross loans and leases	106,706	129,905
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Loans, net
Gross loans and leases	33,990	44,872
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member]
Loans, net
Gross loans and leases	109,791	209,048
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member]
Loans, net
Gross loans and leases	101,184	307,679
Consumer Portfolio Segment [Member]
Loans, net
Gross loans and leases	$ 4,550	$ 5,589

Loans and Leases - Credit Quali

Loans and Leases - Credit Quality Classifications (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	$ 1,989,726	$ 2,463,111
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,893,223	2,307,780
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	63,248	96,036
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	23,823	40,315
Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	9,432	18,980
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,740,211	1,895,923
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,656,810	1,760,511
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	53,228	80,542
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	22,506	37,431
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	7,667	17,439
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	21,369	48,565
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	19,669	40,044
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,700	8,521
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	25,299	71,980
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	24,958	61,809
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	7,478
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	2,148
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	341	545
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	289,457	139,836
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	282,717	130,559
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	4,703	4,922
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	201	1,356
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,836	2,999
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	26,588	38,075
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	23,277	30,479
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	615	2,581
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	55	58
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	2,641	4,957
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	53,458	61,865
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	49,986	57,934
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	3,472	3,597
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	334
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	334,446	343,199
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	321,996	308,819
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	6,108	21,148
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	3,860	5,652
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	2,482	7,580
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	882,888	1,062,498
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	841,728	1,026,041
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	26,364	10,827
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	14,429	25,048
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	367	582
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	106,706	129,905
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	92,479	104,826
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	10,266	21,468
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	3,961	3,169
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	442
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	33,990	44,872
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	32,513	39,391
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	3,617
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,099	1,614
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	378	250
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	109,791	209,048
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	98,367	194,876
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	9,989	11,819
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	212	1,259
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	1,223	1,094
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	101,184	307,679
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	101,184	307,679
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	0	0
Consumer Portfolio Segment [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	4,550	5,589
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	4,349	5,323
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	31	58
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	6	11
Consumer Portfolio Segment [Member] | Impaired [Member]
Financing Receivable Recorded Investment [Line Items]
Total gross loans and leases	$ 164	$ 197

Loans and Leases - Allowance fo

Loans and Leases - Allowance for Credit Losses - Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 17,738	$ 9,923	$ 9,750
Charge-offs	(1,400)	(1,833)	(4,873)
Recoveries	1,568	1,098	2,496
(Benefit) provision	(3,650)	8,550	2,550
Ending balance	14,256	17,738	9,923
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11,766	5,635	5,831
Charge-offs	(245)	0	(1,190)
Recoveries	601	87	647
(Benefit) provision	(536)	6,044	347
Ending balance	11,586	11,766	5,635
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	482	193	256
Charge-offs	(50)	0	0
Recoveries	0	0	0
(Benefit) provision	32	289	(63)
Ending balance	464	482	193
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4,721	2,685	2,394
Charge-offs	(159)	(436)	(1,274)
Recoveries	223	129	690
(Benefit) provision	(3,226)	2,343	875
Ending balance	1,559	4,721	2,685
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	720	1,278	1,239
Charge-offs	(946)	(1,397)	(2,409)
Recoveries	744	882	1,159
(Benefit) provision	(8)	(43)	1,289
Ending balance	510	720	1,278
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	49	132	30
Charge-offs	0	0	0
Recoveries	0	0	0
(Benefit) provision	88	(83)	102
Ending balance	$ 137	$ 49	$ 132

Loans and Leases - Activity in

Loans and Leases - Activity in Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	$ 9,432	$ 18,980	$ 14,153
Collectively	1,980,294	2,444,131	1,748,412
Total Financing Receivables	1,989,726	2,463,111
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	7,667	17,439	12,745
Collectively	1,732,544	1,878,484	1,389,368
Total Financing Receivables	1,740,211	1,895,923
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	378	250	5
Collectively	33,612	44,622	48,031
Total Financing Receivables	33,990	44,872
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	1,223	1,094	977
Collectively	209,752	515,633	303,658
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Individually	164	197	426
Collectively	4,386	5,392	$ 7,355
Total Financing Receivables	$ 4,550	$ 5,589

Loans and Leases - Allowance _2

Loans and Leases - Allowance for Credit Losses - Reserves (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable Allowance For Credit Losses [Line Items]
Specific	$ 818	$ 996	$ 827
General	13,438	16,742	9,096
Ending balance	14,256	17,738	9,923	$ 9,750
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific	428	525	493
General	10,983	11,241	5,142
Ending balance	11,586	11,766	5,635	5,831
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific	244	250	1
General	217	232	192
Ending balance	464	482	193	256
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific	127	202	219
General	1,405	4,519	2,466
Ending balance	1,559	4,721	2,685	2,394
Consumer Portfolio Segment [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific	19	19	114
General	487	701	1,164
Ending balance	510	720	1,278	1,239
Unallocated [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
General	346	49	132
Ending balance	$ 137	$ 49	$ 132	$ 30

Loans and Leases - Past Due and

Loans and Leases - Past Due and Nonaccrual Loans - Tabular Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	$ 1,989,726	$ 2,463,111
Non-Accrual Loans	4,522	7,598
Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	3,565	5,378
30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	2,165	2,083
60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	135	1,435
90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	1,265	1,860
Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	1,986,161	2,457,733
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	1,740,211	1,895,923
Non-Accrual Loans	3,149	6,298
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	2,516	4,528
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	1,686	1,720
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	132	1,435
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	698	1,373
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	1,737,695	1,891,395
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	21,369	48,565
Non-Accrual Loans	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	21,369	48,565
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	25,299	71,980
Non-Accrual Loans	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	25,299	71,980
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	289,457	139,836
Non-Accrual Loans	1,023	1,193
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	1,664	397
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	1,532	210
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	132	37
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	150
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	287,793	139,439
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	26,588	38,075
Non-Accrual Loans	892	2,403
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	30	1,960
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	30	1,409
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	551
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	26,558	36,115
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	53,458	61,865
Non-Accrual Loans	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	53,458	61,865
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	334,446	343,199
Non-Accrual Loans	1,234	1,678
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	822	1,366
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	124	101
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	1,187
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	698	78
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	333,624	341,833
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	882,888	1,062,498
Non-Accrual Loans	0	582
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	152
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	152
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	882,888	1,062,346
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	106,706	129,905
Non-Accrual Loans	0	442
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	653
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	211
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	442
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	106,706	129,252
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	33,990	44,872
Non-Accrual Loans	378	250
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	284	250
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	284	250
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	33,706	44,622
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	109,791	209,048
Non-Accrual Loans	973	1,026
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	756	562
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	473	325
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	283	237
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Commercial and Industrial Loans and Leases [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	109,035	208,486
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	101,184	307,679
Non-Accrual Loans	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Mortgage Warehouse Lines [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	101,184	307,679
Consumer Portfolio Segment [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	4,550	5,589
Non-Accrual Loans	22	24
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	9	38
Consumer Portfolio Segment [Member] | 30-59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	6	38
Consumer Portfolio Segment [Member] | 60-89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	3	0
Consumer Portfolio Segment [Member] | 90 Days Or More Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0	0
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	$ 4,541	$ 5,551

Loans and Leases - Past Due a_2

Loans and Leases - Past Due and Nonaccrual Loans - Additional Information (Details)	Dec. 31, 2021USD ($)item	Dec. 31, 2020USD ($)
Financing Receivable, Past Due [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 0	$ 0
Payment Deferral [Member]
Financing Receivable, Past Due [Line Items]
Number of customers | item	1
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 10,400,000

Loans and Leases - Individually

Loans and Leases - Individually Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	$ 6,175	$ 13,338	$ 9,694
With an Allowance Recorded Recorded Investment	6,162	13,289	9,465
With an Allowance Recorded Related Allowance	818	996	827
With an Allowance Recorded Average Recorded Investment	6,474	13,796	9,951
With an Allowance Recorded Interest Income Recognized	542	513	503
With no Related Allowance Recorded Unpaid Principal Balance	3,389	6,058	6,121
With no Related Allowance Recorded Recorded Investment	3,270	5,691	4,688
With no Related Allowance Recorded Average Recorded Investment	3,577	5,915	6,684
With no Related Allowance Recorded Interest Income Recognized	6	5	24
Individually impaired loans Unpaid Principal Balance	9,564	19,396	15,815
Total impaired loans	9,432	18,980	14,153
Individually impaired loans Average Recorded Investment	10,051	19,711	16,635
Individually impaired loans Interest Income Recognized	548	518	527
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	5,010	11,908	8,310
With an Allowance Recorded Recorded Investment	4,997	11,907	8,138
With an Allowance Recorded Related Allowance	428	525	493
With an Allowance Recorded Average Recorded Investment	5,175	12,173	8,336
With an Allowance Recorded Interest Income Recognized	473	491	439
With no Related Allowance Recorded Unpaid Principal Balance	2,789	5,864	6,010
With no Related Allowance Recorded Recorded Investment	2,670	5,532	4,607
With no Related Allowance Recorded Average Recorded Investment	2,841	5,745	6,382
With no Related Allowance Recorded Interest Income Recognized	6	3	9
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	341	545	656
With an Allowance Recorded Recorded Investment	341	545	537
With an Allowance Recorded Related Allowance	64	171	157
With an Allowance Recorded Average Recorded Investment	352	565	563
With an Allowance Recorded Interest Income Recognized	55	40	32
With no Related Allowance Recorded Unpaid Principal Balance		114	52
With no Related Allowance Recorded Recorded Investment		0	17
With no Related Allowance Recorded Average Recorded Investment		5	577
With no Related Allowance Recorded Interest Income Recognized		0	4
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	1,048	2,078	2,298
With an Allowance Recorded Recorded Investment	1,048	2,077	2,298
With an Allowance Recorded Related Allowance	37	51	58
With an Allowance Recorded Average Recorded Investment	1,096	2,141	2,365
With an Allowance Recorded Interest Income Recognized	104	104	146
With no Related Allowance Recorded Unpaid Principal Balance	788	942	755
With no Related Allowance Recorded Recorded Investment	788	922	722
With no Related Allowance Recorded Average Recorded Investment	869	960	726
With no Related Allowance Recorded Interest Income Recognized	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	2,005	2,875	4,173
With an Allowance Recorded Recorded Investment	1,993	2,875	4,120
With an Allowance Recorded Related Allowance	182	233	252
With an Allowance Recorded Average Recorded Investment	2,056	2,989	4,185
With an Allowance Recorded Interest Income Recognized	138	98	200
With no Related Allowance Recorded Unpaid Principal Balance	648	2,160	326
With no Related Allowance Recorded Recorded Investment	648	2,082	301
With no Related Allowance Recorded Average Recorded Investment	690	2,127	310
With no Related Allowance Recorded Interest Income Recognized	6	3	5
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance		334	353
With an Allowance Recorded Recorded Investment		334	353
With an Allowance Recorded Related Allowance		16	17
With an Allowance Recorded Average Recorded Investment		343	361
With an Allowance Recorded Interest Income Recognized		23	23
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	1,249	6,076	593
With an Allowance Recorded Recorded Investment	1,248	6,076	593
With an Allowance Recorded Related Allowance	19	54	6
With an Allowance Recorded Average Recorded Investment	1,278	6,135	606
With an Allowance Recorded Interest Income Recognized	144	226	38
With no Related Allowance Recorded Unpaid Principal Balance	1,353	1,624	1,560
With no Related Allowance Recorded Recorded Investment	1,234	1,504	1,440
With no Related Allowance Recorded Average Recorded Investment	1,282	1,590	1,477
With no Related Allowance Recorded Interest Income Recognized	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	367
With an Allowance Recorded Recorded Investment	367
With an Allowance Recorded Related Allowance	126
With an Allowance Recorded Average Recorded Investment	393
With an Allowance Recorded Interest Income Recognized	32
With no Related Allowance Recorded Unpaid Principal Balance		582	3,295
With no Related Allowance Recorded Recorded Investment		582	2,105
With no Related Allowance Recorded Average Recorded Investment		617	3,267
With no Related Allowance Recorded Interest Income Recognized		0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance			237
With an Allowance Recorded Recorded Investment			237
With an Allowance Recorded Related Allowance			3
With an Allowance Recorded Average Recorded Investment			256
With no Related Allowance Recorded Unpaid Principal Balance		442	22
With no Related Allowance Recorded Recorded Investment		442	22
With no Related Allowance Recorded Average Recorded Investment		446	25
With no Related Allowance Recorded Interest Income Recognized		0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	244	250	5
With an Allowance Recorded Recorded Investment	244	250	5
With an Allowance Recorded Related Allowance	244	250	1
With an Allowance Recorded Average Recorded Investment	246	250	6
With an Allowance Recorded Interest Income Recognized	0	0
With no Related Allowance Recorded Unpaid Principal Balance	134
With no Related Allowance Recorded Recorded Investment	134
With no Related Allowance Recorded Average Recorded Investment	186
With no Related Allowance Recorded Interest Income Recognized	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	757	945	915
With an Allowance Recorded Recorded Investment	757	935	896
With an Allowance Recorded Related Allowance	127	202	219
With an Allowance Recorded Average Recorded Investment	873	1,152	1,140
With an Allowance Recorded Interest Income Recognized	41	6	29
With no Related Allowance Recorded Unpaid Principal Balance	466	189	102
With no Related Allowance Recorded Recorded Investment	466	159	81
With no Related Allowance Recorded Average Recorded Investment	550	165	162
With no Related Allowance Recorded Interest Income Recognized	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Unpaid Principal Balance	164	235	464
With an Allowance Recorded Recorded Investment	164	197	426
With an Allowance Recorded Related Allowance	19	19	114
With an Allowance Recorded Average Recorded Investment	180	221	469
With an Allowance Recorded Interest Income Recognized	$ 28	16	35
With no Related Allowance Recorded Unpaid Principal Balance		5	9
With no Related Allowance Recorded Recorded Investment		0
With no Related Allowance Recorded Average Recorded Investment		5	140
With no Related Allowance Recorded Interest Income Recognized		$ 2	$ 15

Loans and Leases - Impaired Tro

Loans and Leases - Impaired Troubled Debt Restructurings (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 0.4	$ 0.4
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0.1	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	5.4	13
Consumer Portfolio Segment [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 0.2	$ 0.2

Loans and Leases - Additional C

Loans and Leases - Additional Commitments to Existing Customers with Restructured Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Additional Commitments To Financing Receivable Modifications Amount	$ 40	$ 50

Loans and Leases - Interest Inc

Loans and Leases - Interest Income Recognized on Impaired Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Impaired Financing Receivable, Interest Income, Accrual Method, Total	$ 548,000	$ 518,000	$ 527,000
Interest income recognized on a cash basis on impaired loans	$ 0	$ 0	$ 0

Loans and Leases - Schedule o_2

Loans and Leases - Schedule of Loans and Leases Receivable Impaired Interest Income and Lost from Non Accrual Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Interest that would have been recorded under the loans' original terms	$ 406	$ 605	$ 650
Less gross interest recorded	33	201	289
Foregone interest	$ 373	$ 404	$ 361

Loans and Leases - Loans Pledge

Loans and Leases - Loans Pledged to Secure Short-term Borrowing Arrangements (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Loans and Leases Receivable, Collateral for Secured Borrowings	$ 808.8	$ 1,100

Loans and Leases - Deferred Sal

Loans and Leases - Deferred Salaries and Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Deferred Salaries And Benefits	$ 1	$ 3.3	$ 3.7

Loans and Leases - Troubled Deb

Loans and Leases - Troubled Debt Restructurings, by Type of Loan Modification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 1,589	$ 7,849	$ 967
Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	94
Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,483	7,511	771
Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	83	0	102
Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	23	338	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,219	7,706	507
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,136	7,368	507
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	83	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	338	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	85	163
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	85	163
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	1,325	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	1,325	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,083	0	344
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,000	0	344
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	83	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	136	5,853	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	136	5,515	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	338	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	443	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	443	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	118	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	118	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	185	143	401
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	94
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	185	143	255
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	52
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	67	0	59
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	44	0	9
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	50
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	23	$ 0	$ 0
Small Business Administration Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Small Business Administration Loans [Member] | Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Small Business Administration Loans [Member] | Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Small Business Administration Loans [Member] | Troubled Debt Restructurings Interest Only Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Small Business Administration Loans [Member] | Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0
Small Business Administration Loans [Member] | Troubled Debt Restructurings Term And Interest Modification [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 0

Loans and Leases - Troubled D_2

Loans and Leases - Troubled Debt Restructurings - Tabular Disclosure (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Outstanding Recorded Investment	$ 1,590	$ 7,850	$ 967
Post-Modification Outstanding Recorded Investment	1,589	7,849	967
Reserve Difference	116	61	(32)
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member]
Financing Receivable, Modifications [Line Items]
Pre-Modification Outstanding Recorded Investment	1,220	7,707	507
Post-Modification Outstanding Recorded Investment	1,219	7,706	507
Reserve Difference	$ (1)	$ 58	$ 74
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family Residential Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0
Pre-Modification Outstanding Recorded Investment	$ 0
Post-Modification Outstanding Recorded Investment	0
Reserve Difference	$ 0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Other construction/land [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 86	$ 163
Post-Modification Outstanding Recorded Investment	0	85	163
Reserve Difference	$ 0	$ 40	$ 74
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | 1-4 Family - Closed-End [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 1,325	$ 0
Post-Modification Outstanding Recorded Investment	0	1,325	0
Reserve Difference	$ 0	$ 10	$ 0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	2	0	2
Pre-Modification Outstanding Recorded Investment	$ 1,083	$ 0	$ 344
Post-Modification Outstanding Recorded Investment	1,083	0	344
Reserve Difference	$ 0	$ 0	$ 0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Multi-Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0
Reserve Difference	$ 0	$ 0	$ 0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	4	0
Pre-Modification Outstanding Recorded Investment	$ 137	$ 5,853	$ 0
Post-Modification Outstanding Recorded Investment	136	5,853	0
Reserve Difference	$ (1)	$ 8	$ 0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	1	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 443	$ 0
Post-Modification Outstanding Recorded Investment	0	443	0
Reserve Difference	$ 0	$ 0	$ 0
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Farmland [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0
Reserve Difference	$ 0	$ 0	$ 0
Agricultural Portfolio Segment [Member] | Agricultural Sector [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0	0
Pre-Modification Outstanding Recorded Investment	$ 118	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	118	0	0
Reserve Difference	$ 116	$ 0	$ 0
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	3	7
Pre-Modification Outstanding Recorded Investment	$ 185	$ 143	$ 401
Post-Modification Outstanding Recorded Investment	185	143	401
Reserve Difference	$ (1)	$ 3	$ (59)
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	0	2
Pre-Modification Outstanding Recorded Investment	$ 67	$ 0	$ 59
Post-Modification Outstanding Recorded Investment	67	0	59
Reserve Difference	$ 2	$ 0	$ (47)
Small Business Administration Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0
Pre-Modification Outstanding Recorded Investment	$ 0
Post-Modification Outstanding Recorded Investment	0
Reserve Difference	$ 0

Loans and Leases - Total Allowa

Loans and Leases - Total Allowance for Loan and Lease Losses Specifically Allocated to Troubled Debt Restructurings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Allowance for Loan and Lease Losses, Adjustments, Other	$ 0.5	$ 0.6

Loans and Leases - Purchased Cr

Loans and Leases - Purchased Credit Impaired Loans - Tabular Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance, Total	$ 9,564	$ 19,396	$ 15,815
Impaired Financing Receivable, Carrying Value, Total	9,432	18,980	$ 14,153
Nonperforming Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance, Total	60	78
Impaired Financing Receivable, Carrying Value, Total	60	78
Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] | Real Estate Sector [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance, Total	60	78
Impaired Financing Receivable, Carrying Value, Total	$ 60	$ 78

Loans and Leases - Purchased _2

Loans and Leases - Purchased Credit Impaired Loans - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Credit Quality and Nonperforming Assets [Abstract]
Purchased credit impaired loans acquired	$ 0	$ 0

Premises and Equipment - Premis

Premises and Equipment - Premises and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 59,753	$ 63,262
Less accumulated depreciation and amortization	36,182	35,757
Property, Plant and Equipment, Net, Total	23,571	27,505
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,823	5,751
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	21,006	21,580
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	19,242	20,705
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 14,682	$ 15,226

Premises and Equipment - Deprec

Premises and Equipment - Depreciation and Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Depreciation, Depletion and Amortization [Abstract]
Depreciation and amortization	$ 3.1	$ 2.8	$ 2.8

Operating Leases - General Info

Operating Leases - General Information (Details)	Dec. 31, 2021Officestore
Lessee Disclosure [Abstract]
Number of branch locations	18
Number of ATM locations	4
Number of administration offices | Office	1

Operating Leases - Lease Expens

Operating Leases - Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income and Expenses, Lessee [Abstract]
Operating lease, expense	$ 2,200	$ 2,200	$ 2,200

Operating Leases - Assets and L

Operating Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets and Liabilities, Lessee [Abstract]
Right-of-use assets	$ 5,500	$ 7,200
Operating Lease, Right-of-Use Asset, Statement of Financial Position	Other assets	Other assets
Operating lease liabilities	$ 6,209	$ 7,800
Operating Lease, Liability, Statement of Financial Position	Other liabilities	Other liabilities

Operating Leases - Lease Cost (

Operating Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee Disclosure [Abstract]
Weighted average lease term (in years)	6 years 3 months 18 days	6 years 9 months 18 days
Weighted average discount rate (as a percent)	5.30%	5.50%
Lease liabilities from new right-of-use assets obtained during the year	$ 500	$ 600
Variable lease costs	0	0
Cash paid on operating leases	$ 2,200	$ 2,200

Operating Leases - Schedule of

Operating Leases - Schedule of Future Undiscounted Lease Payments for Operating Leases (Details) $ in Thousands	Dec. 31, 2021USD ($)
Leases [Abstract]
2022	$ 1,909
2023	1,403
2024	1,057
2025	782
2026	479
Thereafter	1,722
Total undiscounted lease payments	$ 7,352

Operating Leases - Lease Liabil

Operating Leases - Lease Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Lease Liabilities, Gross Difference, Amount [Abstract]
Total undiscounted lease payments	$ 7,352
Less: imputed interest	(1,143)
Operating lease liabilities	$ 6,209	$ 7,800

Operating Leases - Renewal Term

Operating Leases - Renewal Terms (Details)	Dec. 31, 2021
Minimum [Member]
Lessee, Operating Lease, Description [Abstract]
Lessee, Operating Lease, Renewal Term	1 year
Maximum [Member]
Lessee, Operating Lease, Description [Abstract]
Lessee, Operating Lease, Renewal Term	10 years

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Rollforward of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Beginning Balance	$ 27,357	$ 27,357	$ 27,357
Acquired goodwill	0	0	0
Impairment	0	0	0
Goodwill, Ending Balance	$ 27,357	$ 27,357	$ 27,357

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Goodwill Impairment (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)segment$ / shares	Dec. 31, 2020USD ($)segment	Dec. 31, 2019USD ($)segment
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Number of Operating Segments | segment	1	1	1
Goodwill and Intangible Asset Impairment [Abstract]
Share Price | $ / shares	$ 27.15
Impairment | $	$ 0	$ 0	$ 0

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Acquired Intangible Assets (Details) - Core Deposits [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,401	$ 8,401
Accumulated Amortization	$ 5,126	$ 4,094

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amortization [Abstract]
Amortization of Intangible Assets	$ 1,032	$ 1,074	$ 1,074

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets - Estimated Amortization Expense (Details) $ in Thousands	Dec. 31, 2021USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2022	$ 1,000
2023	876
2024	781
2025	566
2026	52
Total	$ 3,275

Other Assets - Tabular Disclosu

Other Assets - Tabular Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets [Abstract]
Accrued interest receivable	$ 11,246	$ 16,074
Deferred tax assets	3,792	839
Investment in qualified affordable housing projects	2,940	3,473
Investment in limited partnerships	1,655	1,848
Federal Home Loan Bank stock, at cost	12,393	10,727
Other	26,003	17,485
Other Assets, Total	$ 58,029	$ 50,446

Other Assets - Additional Infor

Other Assets - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets [Abstract]
Qualified affordable housing projects capital commitment	$ 100
Federal Home Loan Bank stock, at cost	$ 12,393	$ 10,727

Deposits - Interest Bearing Dep

Deposits - Interest Bearing Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Interest-bearing Deposit Liabilities, by Component [Abstract]
Time, $250,000 or more	$ 115,200	$ 225,400
Interest bearing	$ 1,697,028	$ 1,680,942

Deposits - Maturities of Times

Deposits - Maturities of Times Deposits (Details) $ in Thousands	Dec. 31, 2021USD ($)
Time Deposits, Fiscal Year Maturity [Abstract]
2022	$ 294,284
2023	31,227
2024	26,051
2025	1,254
2026	309
Thereafter	772
Time Deposits	$ 353,897

Deposits - Interest Expense Rec

Deposits - Interest Expense Recognized on Interest Bearing Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest Expense, Deposits [Abstract]
Interest bearing demand deposits	$ 331	$ 278	$ 316
NOW	444	388	524
Savings	240	221	308
Money market	111	128	181
Time deposits	1,039	2,687	8,931
Brokered Deposits	225	246	1,120
Interest Expense, Deposits, Total	$ 2,390	$ 3,948	$ 11,380

Other Borrowing Arrangements -

Other Borrowing Arrangements - Tabular Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Average balance outstanding	$ 75,629	$ 88,207
Amount	106,937	182,038
Maximum month-end balance during the year	111,937	236,549
Repurchase Agreements [Member]
Short-term Debt [Line Items]
Average balance outstanding	70,443	34,614
Amount	$ 106,937	$ 39,138
Average interest rate during the year	0.30%	0.40%
Maximum month-end balance during the year	$ 106,937	$ 41,449
Weighted average interest rate	0.30%	0.40%
Short-term Debt, Excluding Repurchase Agreements [Member]
Short-term Debt [Line Items]
Average balance outstanding	$ 5,186	$ 53,593
Amount	$ 0	$ 142,900
Average interest rate during the year	0.06%	0.19%
Maximum month-end balance during the year	$ 5,000	$ 195,100
Weighted average interest rate	0.00%	0.12%

Other Borrowing Arrangements _2

Other Borrowing Arrangements - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term borrowings	$ 106,937,000	$ 182,038,000
Short-term Debt, Excluding Repurchase Agreements [Member]
Short-term Debt [Line Items]
Short-term borrowings	0	142,900,000
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
First mortgage loans under a blanket lien arrangement collateralized	808,800,000,000
Maximum borrowing capacity	888,800,000
Remaining borrowing capacity	732,200,000
Federal Reserve Bank Advances [Member]
Short-term Debt [Line Items]
First mortgage loans under a blanket lien arrangement collateralized	66,100,000
Maximum borrowing capacity	50,600,000
Short-term borrowings	0	0
Unsecured Debt [Member] | Unsecured Lines of Credit, Correspondent Banks [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity	305,000,000	275,000,000
Short-term borrowings	$ 0	$ 100,000,000

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 30, 2016	Jun. 30, 2006	Mar. 31, 2004	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal				$ 50,000	$ 0
Unamortized Debt Issuance Costs				(859)	0
Subordinated Debt [Member]
Debt Instrument [Line Items]
Principal				50,000	0
Unamortized Debt Issuance Costs				$ (859)	$ 0
Fixed Interest Rate				3.25%
Basis Spread	1.50%	1.40%	2.75%
Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument [Line Items]
Basis Spread				2.535%

Subordinated Debentures (Detail

Subordinated Debentures (Details) - USD ($)	3 Months Ended			12 Months Ended
	Sep. 30, 2016	Jun. 30, 2006	Mar. 31, 2004	Dec. 31, 2021
Subordinated Borrowings [Line Items]
Proceeds from Issuance of Subordinated Long-term Debt				$ 49,141,000
Subordinated Debt [Member]
Subordinated Borrowings [Line Items]
Proceeds from Issuance of Subordinated Long-term Debt	$ 7,217,000	$ 15,464,000	$ 15,464,000
Subordinated Borrowing, Due Date	Dec. 15, 2037	Sep. 23, 2036	Mar. 17, 2034
Subordinated Borrowing, Interest Rate	1.70%	1.62%	2.97%
Debt Instrument, Basis Spread on Variable Rate	1.50%	1.40%	2.75%
Statutory Trust [Member]
Subordinated Borrowings [Line Items]
Trust Preferred Securities Qualified As Tier One Capital				$ 35,300,000
Sierra Statutory Trust II [Member]
Subordinated Borrowings [Line Items]
Floating Rate Capital Trust Pass Through Securities Issued During Period		15,000	15,000
Floating rate capital trust pass through securities liquidation value per securities		$ 1,000	$ 1,000
Proceeds from Issuance of Mandatory Redeemable Capital Securities		$ 15,000,000	$ 15,000,000
Payment Deferral Period, Debt				5 years
Coast Bancorp Statutory Trust II [Member]
Subordinated Borrowings [Line Items]
Floating Rate Capital Trust Pass Through Securities Issued During Period	7,000
Floating rate capital trust pass through securities liquidation value per securities	$ 1,000
Proceeds from Issuance of Mandatory Redeemable Capital Securities	$ 7,000,000
Payment Deferral Period, Debt				5 years

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal (Current)									$ 8,186	$ 7,979	$ 7,081
Federal (Deferred)									135	(1,697)	(228)
Federal									8,321	6,282	6,853
State (Current)									5,916	5,711	4,771
State (Deferred)									(50)	(914)	133
State									5,866	4,797	4,904
Income Tax Expense (Benefit), Total	$ 3,073	$ 3,370	$ 3,958	$ 3,786	$ 2,936	$ 3,169	$ 2,506	$ 2,468	$ 14,187	$ 11,079	$ 11,757

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan and lease losses	$ 4,215	$ 5,244
Foreclosed assets	126	126
Deferred compensation	4,511	4,147
Accrued reserves	555	325
Non accrual loans	363	403
Lease Liability	1,752	2,283
Loan fair value adjustment	420	956
Capital losses carried forward		29
Net operating losses	1,592	1,751
State income tax deduction	1,179	1,170
Other	992	986
Total deferred tax assets	15,705	17,420
Deferred tax liabilities:
Deferred loan costs	(1,288)	(2,482)
Right-of-use asset	(1,618)	(2,127)
Intangibles	(579)	(832)
Premises and equipment	(917)	(750)
Net unrealized gain on securities available-for-sale	(4,687)	(7,725)
Other	(2,824)	(2,665)
Total deferred tax liabilities	(11,913)	(16,581)
Net deferred tax assets	$ 3,792	$ 839

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense at federal statutory rate									$ 12,012	$ 9,770	$ 10,021
State franchise tax expense, net of federal tax effect									4,634	3,790	3,872
Tax exempt municipal income									(1,306)	(1,199)	(952)
Affordable housing tax credits									(524)	(518)	(538)
Excess tax benefit of stock-based compensation									(109)	(90)	(133)
Cash surrender value - life insurance									(556)
Other									36	(674)	(513)
Income Tax Expense (Benefit), Total	$ 3,073	$ 3,370	$ 3,958	$ 3,786	$ 2,936	$ 3,169	$ 2,506	$ 2,468	$ 14,187	$ 11,079	$ 11,757
Effective tax rate									24.80%	23.81%	24.64%

Income Taxes - Open Tax Years (

Income Taxes - Open Tax Years (Details)	12 Months Ended
	Dec. 31, 2021
Domestic Tax Authority [Member] | Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2018
Domestic Tax Authority [Member] | Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2020
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2017
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2020

Income Taxes - Net Operating Lo

Income Taxes - Net Operating Loss Carry Forwards (Details) $ in Millions	Dec. 31, 2021USD ($)
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 4.8
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 6.9

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Recorded interest or penalties related to uncertain tax positions	$ 0	$ 0	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Letter of Credit (Details) $ in Millions	Dec. 31, 2021USD ($)
Commitments And Contingencies [Line Items]
Letters of Credit Outstanding, Amount	$ 128.6
Standby Letters of Credit [Member]
Commitments And Contingencies [Line Items]
Fair Value Disclosure Off-balance Sheet Risks Amount Asset	3.6
Commitments to Extend Credit [Member]
Commitments And Contingencies [Line Items]
Fair Value Disclosure Off-balance Sheet Risks Amount Asset	$ 125

Commitments and Contingencies_2

Commitments and Contingencies - Federal Reserve Requirement (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Federal Reserve Bank Reserve Balance	$ 0	$ 0

Commitments and Contingencies_3

Commitments and Contingencies - Financial Instruments Representing Off-balance Sheet Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 6,651	$ 8,104
Fixed Rate Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	72,946	75,291
Variable Rate Commitments To Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 481,082	$ 366,525

Commitments and Contingencies_4

Commitments and Contingencies - Concentration in Real Estate Lending (Details) - Loans and Leases Receivable [Member] - Credit Concentration Risk [Member] - Commercial, Residential, and Farm Land Real Estate Portfolio Segment [Member] - Real Estate Sector [Member]	12 Months Ended
	Dec. 31, 2021
Concentration Risk [Line Items]
Concentration Risk, Percentage	87.00%
Commercial Real Estate [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	71.00%
Residential Real Estate [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	22.00%
Farm Land Real Estate [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	6.00%

Shareholders' Equity - General

Shareholders' Equity - General Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class Of Stock [Line Items]
Stock Repurchased During Period, Shares	187,438
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	812,562
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	416,000	495,000	458,000	453,000
Weighted average remaining contractual term	5 years 10 months 24 days
Exercisable, weighted average remaining contractual term	5 years 7 months 6 days
Stock Issued During Period Shares Stock Option Exercised	33,000	67,000	83,000
Stock Issued During Period, Value, Stock Options Exercised		$ 775	$ 1,088
Pre-tax charge	$ 100	400	500
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	30	$ 100	$ 100
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 400
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years 10 months 24 days
Stock Options [Member]
Class Of Stock [Line Items]
Shares of common stock were not considered in computing diluted earnings per common share	337,004	348,328	243,657
2007 Stock Option Plan [Member]
Class Of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	172,689
Percentage of Share Based Compensation Arrangement by Share Based Payment Award Options Exercise Price to Fair Market Value	100.00%
2017 Plan [Member]
Class Of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	850,000
Number of shares remained available for grant		408,909
Percentage of Share Based Compensation Arrangement by Share Based Payment Award Options Exercise Price to Fair Market Value	100.00%
Stock Issued During Period Shares Stock Option Exercised	25,452	66,470	83,261
Stock Issued During Period, Value, Stock Options Exercised	$ 300	$ 800	$ 1,100
Deferred Tax Expense from Stock Options Exercised	$ 100	$ 500	$ 300

Shareholders' Equity - Calculat

Shareholders' Equity - Calculation of Numerator and Denominator in Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic Earnings Per Share
Net income	$ 9,621	$ 10,605	$ 11,708	$ 11,078	$ 8,979	$ 10,355	$ 8,303	$ 7,807	$ 43,012	$ 35,444	$ 35,961
Net income - basic									$ 43,012	$ 35,444	$ 35,961
Weighted average shares outstanding, basic (in shares)									15,241,957	15,216,749	15,311,113
Basic earnings per share (in dollars per share)									$ 2.82	$ 2.33	$ 2.35
Diluted Earnings Per Share
Net income - diluted									$ 43,012	$ 35,444	$ 35,961
Weighted average shares outstanding, basic (in shares)									15,241,957	15,216,749	15,311,113
Effect of dilutive stock options									111,488	63,576	125,998
Weighted average shares outstanding, diluted (in shares)									15,353,445	15,280,325	15,437,111
Diluted earnings per share (in dollars per share)	$ 0.63	$ 0.69	$ 0.76	$ 0.72	$ 0.58	$ 0.68	$ 0.54	$ 0.52	$ 2.80	$ 2.32	$ 2.33

Shareholders' Equity - Stock Op

Shareholders' Equity - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (in shares)	495,000	458,000	453,000
Exercised (in shares)	(33,000)	(67,000)	(83,000)
Granted (in shares)	0	126,000	102,000
Canceled (in shares)	(45,000)	(21,000)	(14,000)
Expired (in shares)	(1,000)	(1,000)
Outstanding (in shares)	416,000	495,000	458,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding (in dollars per share)	$ 23.67	$ 21.08	$ 18.45
Exercised (in dollars per share)	14.64	11.65	13.07
Granted (in dollars per share)		27.11	26.97
Canceled (in dollars per share)	26.36	26.01	26.77
Expired (in dollars per share)	10.58	10.73
Outstanding (in dollars per share)	$ 24.15	$ 23.67	$ 21.08
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term	5 years 10 months 24 days
Aggregate intrinsic value	$ 1,338
Aggregate intrinsic value, exercised	$ 346	$ 705	$ 1,150
Exercisable, shares (in shares)	355,000	324,000	322,000
Exercisable, weighted average exercise price (in dollars per share)	$ 23.62	$ 21.97	$ 18.89
Exercisable, weighted average remaining contractual term	5 years 7 months 6 days
Exercisable, aggregate intrinsic value	$ 1,336

Shareholders' Equity - Schedule

Shareholders' Equity - Schedule of Options Indexed to Issuer Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Weighted-average grant-date fair value per share		$ 4.76	$ 6.60
Aggregate intrinsic value, exercised	$ 346	$ 705	$ 1,150
Total fair value of stock options vested	$ 418	$ 489	$ 438

Shareholders' Equity - Restrict

Shareholders' Equity - Restricted Stock Grants (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class Of Stock [Line Items]
Compensation expense	$ 100	$ 400	$ 500
Recognized income tax benefit	$ 30	100	100
Weighted average period of amortized cost	2 years 10 months 24 days
Restricted Stock [Member]
Class Of Stock [Line Items]
Granted (in shares)	73,912
Compensation expense	$ 900	200	0
Recognized income tax benefit	300	$ 100	$ 0
Unamortized compensation and directors' cost	$ 3,000
Weighted average period of amortized cost	3 years 2 months 12 days
Total fair value of shares vested	$ 700
Shares vested	40,000	0	0
Shares
Nonvested shares (in shares)	149,000
Granted (in shares)	73,912
Vested (in shares)	(40,000)	0	0
Forfeited (in shares)	(18,000)
Nonvested shares (in shares)	165,000	149,000
Weighted Average Grant-Date Fair Value
Nonvested shares (in dollars per share)	$ 18
Granted (in dollars per share)	26.66
Vested (in dollars per share)	18
Forfeited (in dollars per share)	18.22
Nonvested shares (in dollars per share)	$ 21.85	$ 18

Regulatory Matters - Tabular Di

Regulatory Matters - Tabular Disclosure (Details) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Tier One Leverage Capital [Abstract]
Capital amount, actual	$ 356,800	$ 330,200
Capital amount, to be well capitalized	$ 290,851	$ 251,595
Banking Regulation, Leverage Ratio [Abstract]
Ratio, actual (as a percent)	10.43	10.50
Ratio, to be well capitalized (as a percent)	8.50	8
Subsidiaries [Member]
Tier One Leverage Capital [Abstract]
Capital amount, actual	$ 387,059	$ 318,194
Capital amount, to be well capitalized	$ 290,817	$ 251,572
Banking Regulation, Leverage Ratio [Abstract]
Ratio, actual (as a percent)	11.31	10.12
Ratio, to be well capitalized (as a percent)	8.50	8

Regulatory Matters - Dividend R

Regulatory Matters - Dividend Restrictions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Regulatory Restrictions on Payment of Dividends	If a California corporation does not have sufficient retained earnings available for the proposed dividend, it may still pay a dividend to its shareholders if immediately after the dividend the value of the company’s assets would equal or exceed the sum of its total liabilities plus any preferred dividend arrears amount.
Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements	$ 77.6

Benefit Plans (Details)

Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan annual benefit after retirement or death period	15 years
Pension and other postretirement benefit contributions, Total	$ 5.1	$ 5.1
Pension and other postretirement benefit expense, Total	0.4	0.2	$ 0.3
Defined benefit plan, Benefits paid	$ 0.4	$ 0.4	$ 0.3
Percentage Of Salary Deferred For Tax Deferred Savings Plan Maximum	15.00%
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	6.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	95.00%	90.00%	95.00%
Defined contribution plan employer matching contribution vesting period	5 years
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1.2	$ 1.1	$ 1.1
Premium Life Insurance Policies [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash Surrender Value of Life Insurance	43.2	43.2
Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash Surrender Value of Life Insurance	$ 11	$ 9.3

Noninterest Income (Details)

Noninterest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Included in other income:
Amortization of limited partnerships	$ (524)	$ (1,189)	$ (2,079)
Dividends on equity investments	737	664	789
Unrealized gains recognized on equity investments	857	447	232
Other	4,019	4,638	3,223
Total other noninterest income	$ 5,089	$ 4,560	$ 2,165

Other Noninterest Expense (Deta

Other Noninterest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Legal, audit and professional	$ 7,652	$ 4,263	$ 4,039
Data processing	5,890	4,661	4,564
Advertising and promotional	1,521	1,889	2,568
Deposit services	9,049	8,483	7,962
Stationery and supplies	345	446	318
Telephone and data communication	2,013	1,775	1,529
Loan and credit card processing	501	879	675
Foreclosed assets expense (income), net	72	253	35
Postage	308	321	436
Other	2,780	2,205	2,082
Assessments	1,157	717	525
Total other noninterest expense	$ 31,288	$ 25,892	$ 24,733

Related Party Transactions - Su

Related Party Transactions - Summary of the Aggregate Activity Involving Related Party Borrowers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, beginning of year	$ 1,794	$ 2,731	$ 2,544
Disbursements	1,983	7,114	18,681
Amounts repaid	(2,548)	(8,051)	(18,494)
Effect of changes in composition of related parties	(162)
Balance, end of year	1,067	1,794	2,731
Undisbursed commitments to related parties	$ 2,156	$ 2,635	$ 1,829

Related Party Transactions - Ge

Related Party Transactions - General Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Related Party Transactions [Abstract]
Deposit From Related Party	$ 9.9	$ 6.1

Fair Value - Assets Measured on

Fair Value - Assets Measured on Recurring Basis, Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	$ 973,314	$ 543,974
U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	1,574	1,800
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	306,727	314,435
States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	304,268	227,739
Corporate Bond [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	28,529
Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	332,216
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	973,314	543,974
Other-than-temporary impairment gain/(loss) on equity securities	0	0
Fair Value, Measurements, Recurring [Member] | U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	1,574	1,800
Other-than-temporary impairment gain/(loss) on equity securities	0	0
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	306,727	314,435
Other-than-temporary impairment gain/(loss) on equity securities	0	0
Fair Value, Measurements, Recurring [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	304,268	227,739
Other-than-temporary impairment gain/(loss) on equity securities	0	0
Fair Value, Measurements, Recurring [Member] | Corporate Bond [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	28,529
Other-than-temporary impairment gain/(loss) on equity securities	0
Fair Value, Measurements, Recurring [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	332,216
Other-than-temporary impairment gain/(loss) on equity securities	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Bond [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	750,077	543,974
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	1,574	1,800
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	306,727	314,435
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	304,268	227,739
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Bond [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	999
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	136,509
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	223,237	0
Assets, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	$ 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Bond [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	27,530
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	$ 195,707

Fair Value - Assets Measured _2

Fair Value - Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Collateralized Loan Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance of recurring Level 3 assets	$ 0	$ 0
Purchases	195,707	0
Ending balance of recurring Level 3 assets	195,707	0
Corporate Bond [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance of recurring Level 3 assets	0	0
Purchases	27,530	0
Ending balance of recurring Level 3 assets	$ 27,530	$ 0

Fair Value - Assets Measured _3

Fair Value - Assets Measured on Nonrecurring Basis, Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets, Fair Value Disclosure [Abstract]
Total impaired loans	$ 9,432	$ 18,980	$ 14,153
Foreclosed assets	93	971
Fair Value, Measurements, Nonrecurring [Member]
Assets, Fair Value Disclosure [Abstract]
Foreclosed assets	93	971
Fair Value, Measurements, Nonrecurring [Member] | Collateral Pledged [Member]
Assets, Fair Value Disclosure [Abstract]
Total impaired loans	398	550
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Foreclosed assets	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateral Pledged [Member]
Assets, Fair Value Disclosure [Abstract]
Total impaired loans	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Foreclosed assets	93	971
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateral Pledged [Member]
Assets, Fair Value Disclosure [Abstract]
Total impaired loans	221	550
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Foreclosed assets	0	0
Assets, Fair Value Disclosure	177	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateral Pledged [Member]
Assets, Fair Value Disclosure [Abstract]
Total impaired loans	$ 177	$ 0

Fair Value - Assets Measured _4

Fair Value - Assets Measured on Nonrecurring Basis, Fair Value Measurement Inputs and Valuation Techniques (Details) - Fair Value, Inputs, Level 3 [Member] - Measurement Input, Discount Rate [Member] - Collateral Pledged [Member]	Dec. 31, 2021
Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Financing Receivable, Recorded Investment, Measurement Input	0.50
Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Financing Receivable, Recorded Investment, Measurement Input	0.70
Weighted Average [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Financing Receivable, Recorded Investment, Measurement Input	0.56

Disclosures about Fair Value _3

Disclosures about Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial Assets:
Investment securities available for sale	$ 973,314	$ 543,974
Total impaired loans	9,432	18,980	$ 14,153
Financial liabilities:
Repurchase agreements	106,937	39,138
Carrying Amount [Member]
Financial Assets:
Cash and cash equivalents	257,528	71,417
Investment securities available for sale	973,314	543,974
Loans and leases, net held for investment	1,973,207	2,441,676
Financial liabilities:
Non-interest-bearing	1,084,544	943,664
Interest-bearing	1,697,028	1,680,942
Fed funds purchased and repurchase agreements		39,138
Repurchase agreements	106,937
Long-term debt	49,141
Short term borrowings		142,900
Subordinated debentures	35,302	35,124
Carrying Amount [Member] | Collateral Pledged [Member]
Financial Assets:
Total impaired loans	398	550
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	257,528	71,417
Investment securities available for sale	973,314	543,974
Loans and leases, net held for investment	1,960,966	2,450,340
Financial liabilities:
Non-interest-bearing	1,084,544	943,664
Interest-bearing	1,696,124	1,680,814
Fed funds purchased and repurchase agreements		39,138
Repurchase agreements	106,937
Long-term debt	49,118
Short term borrowings		142,896
Subordinated debentures	33,281	24,364
Fair Value [Member] | Collateral Pledged [Member]
Financial Assets:
Total impaired loans	398	550
Fair Value [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Cash and cash equivalents	257,528	71,417
Investment securities available for sale	0	0
Loans and leases, net held for investment	0	0
Financial liabilities:
Non-interest-bearing	1,084,544	943,664
Interest-bearing	0	0
Fed funds purchased and repurchase agreements		0
Repurchase agreements	0
Long-term debt	0
Short term borrowings		0
Subordinated debentures	0	0
Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | Collateral Pledged [Member]
Financial Assets:
Total impaired loans	0	0
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Investment securities available for sale	750,077	543,974
Loans and leases, net held for investment	0	0
Financial liabilities:
Non-interest-bearing	0	0
Interest-bearing	1,696,124	1,680,814
Fed funds purchased and repurchase agreements		39,138
Repurchase agreements	106,937
Long-term debt	49,118
Short term borrowings		142,896
Subordinated debentures	33,281	24,364
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Collateral Pledged [Member]
Financial Assets:
Total impaired loans	221	550
Fair Value [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Investment securities available for sale	223,237	0
Loans and leases, net held for investment	1,960,966	2,450,340
Financial liabilities:
Non-interest-bearing	0	0
Interest-bearing	0	0
Fed funds purchased and repurchase agreements		0
Repurchase agreements	0
Long-term debt	0
Short term borrowings		0
Subordinated debentures	0	0
Fair Value [Member] | Fair Value, Inputs, Level 3 [Member] | Collateral Pledged [Member]
Financial Assets:
Total impaired loans	$ 177	$ 0

Disclosures about Fair Value _4

Disclosures about Fair Value of Financial Instruments - Off-Balance-Sheet Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 554,028	$ 441,816
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 6,651	$ 8,104

Qualified Affordable Housing _2

Qualified Affordable Housing Project Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in Affordable Housing Projects [Abstract]
Investment, book balance	$ 2.9	$ 3.5
Investment, remaining commitments for additional capital contributions	0.1	0.1
Investment, amortization expense	0.5	0.6	$ 1.8
Investment, tax credit	0.5	0.5	0.5
Impairment Loss	$ 0	$ 0	$ 0

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Noninterest income
Loss on limited partnerships									$ (524)	$ (1,189)
Dividends on equity investments									737	664	$ 789
Unrealized gains recognized on equity investments									857	447	232
Net gains on sale of securities									11	390	(198)
Other									6,667	7,050
Total noninterest income	$ 7,103	$ 7,534	$ 6,612	$ 6,830	$ 6,040	$ 7,104	$ 6,900	$ 6,106	28,079	26,150	23,477
Deposit Account [Member]
Noninterest income
Revenue from Contract with Customer, Excluding Assessed Tax									11,846	11,765	12,742
Returned Item and Overdraft Fees [Member]
Noninterest income
Revenue from Contract with Customer, Excluding Assessed Tax									4,924	5,078
Other Service Charges on Deposits [Member]
Noninterest income
Revenue from Contract with Customer, Excluding Assessed Tax									6,922	6,687
Debit Card [Member]
Noninterest income
Revenue from Contract with Customer, Excluding Assessed Tax									$ 8,485	$ 7,023	$ 6,584

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Noninterest expense
Salaries and employee benefits									$ 42,431	$ 40,178	$ 35,978
Occupancy expense									9,837	9,842	9,845
(Gain) loss on sale of OREO									(153)	(10)	(107)
Other									31,441	25,902
Total noninterest expense	$ 22,175	$ 20,875	$ 20,235	$ 20,271	$ 20,757	$ 19,304	$ 18,033	$ 17,818	$ 83,556	$ 75,912	$ 70,578

Parent Only Condensed Financi_3

Parent Only Condensed Financial Statements - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 63,147	$ 67,908
Other assets	58,029	50,446
Total assets	3,371,014	3,220,742
Liabilities:
Other liabilities	35,568	35,078
Long-term debt	49,141
Subordinated debentures	35,302	35,124
Total liabilities	3,008,520	2,876,846
Shareholders' equity
Common stock	113,007	113,384
Retained earnings	234,410	208,371
Accumulated other comprehensive gain, net of taxes	11,167	18,405
Total shareholders' equity	362,494	343,896	$ 309,285	$ 273,024
Total liabilities and shareholders' equity	3,371,014	3,220,742
Parent Company [Member]
ASSETS
Cash and due from banks	20,143	12,000
Other assets	21	22
Total assets	449,363	380,181
Liabilities:
Other liabilities	2,426	1,161
Long-term debt	49,141
Subordinated debentures	35,302	35,124
Total liabilities	86,869	36,285
Shareholders' equity
Common stock	116,917	117,120
Retained earnings	234,410	208,371
Accumulated other comprehensive gain, net of taxes	11,167	18,405
Total shareholders' equity	362,494	343,896
Total liabilities and shareholders' equity	449,363	380,181
Parent Company [Member] | Bank Subsidiaries [Member]
ASSETS
Investments in bank subsidiary	428,054	367,014
Parent Company [Member] | Trust Subsidiaries [Member]
ASSETS
Investments in bank subsidiary	$ 1,145	$ 1,145

Parent Only Condensed Financi_4

Parent Only Condensed Financial Statements - Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expense
Salaries and employee benefits									$ 42,431	$ 40,178	$ 35,978
Income before income taxes	$ 12,694	$ 13,975	$ 15,666	$ 14,864	$ 11,915	$ 13,524	$ 10,809	$ 10,275	57,199	46,523	47,718
Income tax benefit	3,073	3,370	3,958	3,786	2,936	3,169	2,506	2,468	14,187	11,079	11,757
Net income	$ 9,621	$ 10,605	$ 11,708	$ 11,078	$ 8,979	$ 10,355	$ 8,303	$ 7,807	43,012	35,444	35,961
Parent Company [Member]
Income:
Dividend from subsidiary									3,200	23,000	17,200
Other operating income									0	43	0
Total income									3,200	23,043	17,200
Expense
Salaries and employee benefits									779	856	582
Other expenses									2,728	1,971	2,664
Total expenses									3,507	2,827	3,246
Income before income taxes									(307)	20,216	13,954
Income tax benefit									(1,037)	(823)	(1,138)
Income before equity in undistributed income of subsidiary									730	21,039	15,092
Equity in undistributed income of subsidiary									42,282	14,405	20,869
Net income									$ 43,012	$ 35,444	$ 35,961

Parent Only Condensed Financi_5

Parent Only Condensed Financial Statements - Condensed Cash Flow Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 43,012	$ 35,444	$ 35,961
Adjustments to reconcile net income to net cash provided by operating activities:
Increase (decrease) in other assets	6,435	(488)	(9,224)
(Decrease) increase in other liabilities	1,602	(8,151)	9,662
Net cash provided by operating activities	52,656	40,027	46,737
Cash flows from investing activities:
Net cash provided by (used in) investing activities	20,620	(627,252)	(53,290)
Cash flows from financing activities:
Stock options exercised	281	775	1,088
Repurchases of common stock	(5,220)	(2,562)	(2,544)
Proceeds from issuance of subordinated debt	49,141
Net cash provided by financing activities	112,835	578,565	12,498
Net increase in cash and cash equivalents	186,111	(8,660)	5,945
Cash and cash equivalents, beginning of period	71,417	80,077	74,132
Cash and cash equivalents, end of period	257,528	71,417	80,077
Parent Company [Member]
Cash flows from operating activities:
Net income	43,012	35,444	35,961
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed net income of subsidiary	(42,282)	(14,405)	(20,869)
Increase (decrease) in other assets	179	178	178
(Decrease) increase in other liabilities	1,263	(41)	(2)
Net cash provided by operating activities	2,172	21,176	15,268
Cash flows from investing activities:
Investment in subsidiary	(25,000)	0	0
Net cash provided by (used in) investing activities	(25,000)	0	0
Cash flows from financing activities:
Stock options exercised	282	775	1,088
Repurchases of common stock	(5,220)	(2,562)	(2,544)
Dividends paid	(13,232)	(12,207)	(11,332)
Proceeds from issuance of subordinated debt	49,141	0	0
Net cash provided by financing activities	30,971	(13,994)	(12,788)
Net increase in cash and cash equivalents	8,143	7,182	2,480
Cash and cash equivalents, beginning of period	12,000	4,818	2,338
Cash and cash equivalents, end of period	$ 20,143	$ 12,000	$ 4,818

Condensed Quarterly Results o_3

Condensed Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Interest income	$ 27,897	$ 27,629	$ 28,092	$ 29,458	$ 29,762	$ 29,044	$ 25,386	$ 26,051	$ 113,076	$ 110,243	$ 110,947
Interest expense	1,331	913	903	903	930	970	1,244	2,264	4,050	5,408	13,578
Net interest income	26,566	26,716	27,189	28,555	28,832	28,074	24,142	23,787	109,026	104,835	97,369
Provision for loan and lease losses	(1,200)	(600)	(2,100)	250	2,200	2,350	2,200	1,800	(3,650)	8,550	2,550
Noninterest income	7,103	7,534	6,612	6,830	6,040	7,104	6,900	6,106	28,079	26,150	23,477
Noninterest expense	22,175	20,875	20,235	20,271	20,757	19,304	18,033	17,818	83,556	75,912	70,578
Net income before taxes	12,694	13,975	15,666	14,864	11,915	13,524	10,809	10,275	57,199	46,523	47,718
Provision for income taxes	3,073	3,370	3,958	3,786	2,936	3,169	2,506	2,468	14,187	11,079	11,757
Net income	$ 9,621	$ 10,605	$ 11,708	$ 11,078	$ 8,979	$ 10,355	$ 8,303	$ 7,807	$ 43,012	$ 35,444	$ 35,961
Diluted earnings per share (in dollars per share)	$ 0.63	$ 0.69	$ 0.76	$ 0.72	$ 0.58	$ 0.68	$ 0.54	$ 0.52	$ 2.80	$ 2.32	$ 2.33
Cash dividends	$ 0.22	$ 0.22	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20