Mid Penn Bancorp (MPB) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 05, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Trading Symbol	MPB
Entity Registrant Name	MID PENN BANCORP INC
Entity Central Index Key	0000879635
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		11,406,095
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	1-13677
Entity Tax Identification Number	25-1666413
Entity Address, Address Line One	349 Union Street
Entity Address, City or Town	Millersburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	17061
City Area Code	1.866
Local Phone Number	642.7736
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	PA
Title of 12(b) Security	Common Stock, $1.00 par value per share
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 36,109,000	$ 31,284,000
Interest-bearing balances with other financial institutions	1,243,000	1,541,000
Federal funds sold	390,019,000	270,899,000
Total cash and cash equivalents	427,371,000	303,724,000
Investment securities held to maturity, at amortized cost (fair value $133,519 and $132,794)	130,560,000	128,292,000
Investment securities available for sale, at fair value	3,250,000	5,748,000
Equity securities available for sale, at fair value	508,000	515,000
Loans held for sale	25,842,000	25,506,000
Loans and leases, net of unearned interest	2,646,236,000	2,384,041,000
Less: Allowance for loan and lease losses	(13,591,000)	(13,382,000)
Net loans and leases	2,632,645,000	2,370,659,000
Bank premises and equipment, net	24,710,000	24,886,000
Operating lease right of use asset	10,791,000	10,157,000
Finance lease right of use asset	3,222,000	3,267,000
Cash surrender value of life insurance	17,257,000	17,183,000
Restricted investment in bank stocks	6,860,000	7,594,000
Accrued interest receivable	11,855,000	12,971,000
Deferred income taxes	5,427,000	3,619,000
Goodwill	62,840,000	62,840,000
Core deposit and other intangibles, net	4,079,000	4,360,000
Foreclosed assets held for sale	154,000	134,000
Other assets	14,667,000	17,493,000
Total Assets	3,382,038,000	2,998,948,000
LIABILITIES & SHAREHOLDERS’ EQUITY
Deposits: Noninterest-bearing demand	676,717,000	536,224,000
Deposits: Interest-bearing demand	601,220,000	605,567,000
Deposits: Money Market	770,800,000	720,506,000
Deposits: Savings	201,225,000	195,038,000
Deposits: Time	416,865,000	417,245,000
Total Deposits	2,666,827,000	2,474,580,000
Short-term borrowings	307,753,000	125,617,000
Long-term debt	75,030,000	75,115,000
Subordinated debt	44,586,000	44,580,000
Operating lease liability	11,828,000	11,200,000
Accrued interest payable	1,902,000	2,007,000
Federal income tax payable	1,321,000
Other liabilities	8,755,000	10,161,000
Total Liabilities	3,118,002,000	2,743,260,000
Shareholders' Equity:
Common stock, par value $1.00 per share; 20,000,000 shares authorized; Shares issued: 8,514,547 at March 31, 2021 and 8,511,835 at December 31, 2020; Shares outstanding: 8,416,095 at March 31, 2021 and 8,419,183 at December 31, 2020	8,515,000	8,512,000
Additional paid-in capital	179,055,000	178,853,000
Retained earnings	77,888,000	70,175,000
Accumulated other comprehensive income (loss)	501,000	(57,000)
Treasury stock, at cost; 98,452 shares at March 31, 2021 and 92,652 shares at December 31, 2020	(1,923,000)	(1,795,000)
Total Shareholders’ Equity	264,036,000	255,688,000
Total Liabilities and Shareholders' Equity	$ 3,382,038,000	$ 2,998,948,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 133,519	$ 132,794
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Shares, Issued	8,514,547	8,511,835
Common Stock, Shares, Outstanding	8,416,095	8,419,183
Treasury Stock, Shares	98,452	92,652

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
INTEREST INCOME
Interest and fees on loans and leases	$ 28,330	$ 22,249
Interest and dividends on investment securities:
U.S. Treasury and government agencies	178	671
State and political subdivision obligations, tax-exempt	277	221
Other securities	302	153
Total interest and dividends on investment securities	757	1,045
Interest on other interest-bearing balances	2	15
Interest on federal funds sold	79	390
Total Interest Income	29,168	23,699
INTEREST EXPENSE
Interest on deposits	2,966	5,380
Interest on short-term borrowings	174
Interest on long-term and subordinated debt	703	654
Total Interest Expense	3,843	6,034
Net Interest Income	25,325	17,665
PROVISION FOR LOAN AND LEASE LOSSES	1,000	550
Net Interest Income After Provision for Loan and Lease Losses	24,325	17,115
NONINTEREST INCOME
Net gain on sales of SBA loans	100	84
Earnings from cash surrender value of life insurance	74	76
Net gain on sales of investment securities		132
Other income	791	372
Total Noninterest Income	4,712	2,934
NONINTEREST EXPENSE
Salaries and employee benefits	9,598	8,281
Occupancy expense, net	1,480	1,439
Equipment expense	751	713
Software licensing and utilization	1,445	1,221
Pennsylvania bank shares tax expense	300	405
FDIC Assessment	470	312
Legal and professional fees	426	352
Charitable contributions qualifying for State tax credits	270	35
Marketing and advertising expense	135	204
Telephone expense	136	134
Intangible amortization	281	323
Other expenses	2,146	2,162
Total Noninterest Expense	17,558	15,581
Mortgage banking profit-sharing expense	120
INCOME BEFORE PROVISION FOR INCOME TAXES	11,479	4,468
Provision for income taxes	2,167	650
NET INCOME	$ 9,312	$ 3,818
PER COMMON SHARE DATA:
Basic Earnings Per Common Share	$ 1.11	$ 0.45
Diluted Earnings Per Common Share	1.10	0.45
Cash Dividends Declared	$ 0.19	$ 0.23
Income from Fiduciary and Wealth Management Activities [Member]
NONINTEREST INCOME
Non-interest Income	$ 556	$ 384
Service Charges on Deposits [Member]
NONINTEREST INCOME
Non-interest Income	152	205
Mortgage Banking Income [Member]
NONINTEREST INCOME
Non-interest Income	2,379	1,182
ATM Debit Card Interchange Income [Member]
NONINTEREST INCOME
Non-interest Income	568	416
Merchant Services Income [Member]
NONINTEREST INCOME
Non-interest Income	$ 92	$ 83

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 9,312	$ 3,818
Other comprehensive income (loss):
Unrealized income arising during the period on available-for-sale securities, net of income taxes impact, respectively		1	250
Reclassification adjustment for net gain on sales of available-for-sale securities included in net income, net of income taxes impact, respectively	[1]		(104)
Change in defined benefit plans, net of income taxes impact, respectively	[2]	600	(537)
Reclassification adjustment for other activity related to benefit plans, net of income taxes respectively	[3]	(43)	(4)
Total other comprehensive income (loss)		558	(395)
Total comprehensive income		$ 9,870	$ 3,423
[1]	Amounts are included in net gain on sales of investment securities on the Consolidated Statements of Income as a separate element within total noninterest income.
[2]	The change in defined benefit plans consists primarily of unrecognized actuarial gains (losses) on defined benefit plans during the period.
[3]	The reclassification adjustment for benefit plans includes settlement gains, and amortization of prior service costs.  Amounts are included in other income on the Consolidated Statements of Income within total noninterest income.  Please reference Note 11 – Defined Benefit Plans, for more information.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Unrealized income arising during the period on available for sale securities, tax	$ 0	$ 67
Reclassification adjustment for net gain on sales of available for sale securities included in net income, tax	0	(28)
Change in defined benefit plans, tax	159	(143)
Reclassification adjustment for settlement gains on benefit plans, tax	$ (11)	$ (1)

Consolidated Statements of Chan

Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2019	$ 237,874	$ 8,481	$ 178,159	$ 50,891	$ 343
Net income	3,818			3,818
Total other comprehensive income, net of taxes	(395)				(395)
Common stock dividends declared	(1,950)			(1,950)
Employee Stock Purchase Plan	33	1	32
Director Stock Purchase Plan	35	2	33
Restricted stock activity	96		96
Balance at Mar. 31, 2020	239,511	8,484	178,320	52,759	(52)
Balance at Dec. 31, 2020	255,688	8,512	178,853	70,175	(57)	$ (1,795)
Net income	9,312			9,312
Total other comprehensive income, net of taxes	558				558
Common stock dividends declared	(1,599)			(1,599)
Repurchased stock	(128)					(128)
Employee Stock Purchase Plan	40	2	38
Director Stock Purchase Plan	33	1	32
Restricted stock activity	132		132
Balance at Mar. 31, 2021	$ 264,036	$ 8,515	$ 179,055	$ 77,888	$ 501	$ (1,923)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Repurchased stock, Shares	5,800
Stock issued during period shares, Director Stock Purchase Plans	1,253	1,743
Common Stock [Member]
Stock issued during period, shares, Employee Stock Purchase Plans	1,459	1,647

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities:
Net Income	$ 9,312	$ 3,818
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan and lease losses	1,000	550
Depreciation	828	775
Amortization of intangibles	281	323
Net amortization of security discounts/premiums	167	149
Amortization of operating lease right of use assets	430	443
Amortization of finance lease right of use asset	45	45
Gain on sales of investment securities		(132)
Earnings on cash surrender value of life insurance	(74)	(76)
Mortgage loans originated for sale	(98,578)	(37,120)
Proceeds from sales of mortgage loans originated for sale	100,621	31,190
Gain on sale of mortgage loans	(2,379)	(1,182)
SBA loans originated for sale	(971)	(1,337)
Proceeds from sales of SBA loans originated for sale	1,071	1,421
Gain on sale of SBA loans	(100)	(84)
Stock compensation expense	132	96
Deferred income tax (benefit) expense	(1,251)	470
Decrease (increase) in accrued interest receivable	1,116	(822)
Decrease (increase) in other assets	2,826	(31)
(Decrease) increase in accrued interest payable	(105)	270
Net change in operating lease liability	(436)	(474)
(Decrease) increase in other liabilities	(665)	806
Net Cash Provided By (Used In) Operating Activities	13,270	(902)
Investing Activities:
Proceeds from the sale of available-for-sale securities		35,964
Proceeds from the maturity or call of available-for-sale securities	2,499	5,378
Purchases of available-for-sale securities		(32,865)
Proceeds from the maturity or call of held-to-maturity securities	12,959	30,347
Purchases of held-to-maturity securities	(14,386)	(61,945)
Redemptions of restricted investment in bank stock	734	347
Net increase in loans and leases	(263,006)	(36,966)
Purchases of bank premises and equipment	(652)	(2,085)
Net Cash Used In Investing Activities	(261,852)	(61,825)
Financing Activities:
Net increase in deposits	192,247	60,887
Net increase in short-term borrowings	182,136
Common stock dividends paid	(2,020)	(1,950)
Treasury stock purchased	(128)
Net change in finance lease liability	(21)	(21)
Proceeds from the issuance of subordinated debt		15,000
Long-term debt repayment	(58)	(9,529)
Net Cash Provided By Financing Activities	372,229	64,455
Net increase in cash and cash equivalents	123,647	1,728
Cash and cash equivalents, beginning of period	303,724	139,030
Cash and cash equivalents, end of period	427,371	140,758
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	3,948	5,764
Supplemental Noncash Disclosures:
Recognition of operating lease right of use assets	1,064
Recognition of operating lease liabilities	1,064
Increase in other liabilities for securities settling after quarter-end	1,008
Loans transferred to foreclosed assets held for sale	20	1,522
Employee [Member]
Financing Activities:
Proceeds from Stock Purchase Plan stock issuance	40	33
Director [Member]
Financing Activities:
Proceeds from Stock Purchase Plan stock issuance	$ 33	$ 35

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	(1) Basis of Presentation The accompanying consolidated financial statements include the accounts of Mid Penn Bancorp, Inc. (“Mid Penn” or the “Corporation”), its wholly-owned subsidiary, Mid Penn Bank (the “Bank”), and non-bank subsidiaries which were established during 2020, including MPB Financial Services, LLC, under which two additional non-bank subsidiaries have been established: (i) MPB Wealth Management, LLC, created to expand the wealth management services of the Corporation, and (ii) MPB Risk Services, LLC, created to fulfill the insurance needs of both existing and potential customers of the Corporation. As of March 31, 2021, the accounts and activities of these non-bank subsidiaries established in 2020 were not material to warrant separate disclosure or segment reporting. All material intercompany accounts and transactions have been eliminated in consolidation. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Mid Penn believes the information presented is not misleading, and the disclosures are adequate. For comparative purposes, the balances for the periods ending March 31, 2020 and December 31, 2020 have been reclassified, when necessary, to conform to the 2021 presentation. Such reclassifications had no impact on net income or total shareholders’ equity. The results of operations for interim periods are not necessarily indicative of operating results expected for the full year. Except for adjustments made related to the adoption of new accounting standards, in the opinion of management, all adjustments necessary for fair presentation of the periods presented have been reflected in the accompanying consolidated financial statements. All such adjustments are of a normal, recurring nature. These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2020. Mid Penn has evaluated events and transactions occurring subsequent to the balance sheet date of March 31, 2021, for items that should potentially be recognized or disclosed in these consolidated financial statements. The evaluation was conducted through the issuance date of these consolidated financial statements. Please reference Note 15 – Subsequent Events

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(2) Summary of Significant Accounting Policies The accounting and reporting policies of Mid Penn conform with accounting principles as required under GAAP and general practices within the financial industry. The following is a description of the more significant accounting policies. Investment Securities Securities to be held for indefinite periods, but not intended to be held to maturity, are classified as available for sale and carried at fair value. Securities held for indefinite periods include securities that management intends to use as part of its asset and liability management strategy and pledging requirements, and that may be sold in response to liquidity needs, changes in interest rates, resultant prepayment risk, reductions in pledging levels, and other factors related to effective portfolio management. Securities to be held to maturity are carried at amortized cost. For available-for-sale debt securities, realized gains and losses on dispositions are based on the difference between net proceeds and the amortized cost of the securities sold, using the specific identification method. Unrealized gains and losses on debt securities are based on the difference between the amortized cost and fair value of each security as of the respective reporting date. Unrealized gains and losses are credited or charged to other comprehensive income on an after-tax basis, whereas realized gains and losses flow through Mid Penn’s consolidated statement of income for the respective period. ASC Topic 320, Investments – Debt and Equity Securities In instances when a determination is made that an other-than-temporary impairment of a debt security exists but the Corporation does not intend to sell the debt security and it is not more likely than not that it will be required to sell the debt security prior to its anticipated recovery, this guidance changes the presentation and amount of the other-than-temporary impairment recognized in the income statement. The other-than-temporary impairment is separated into (a) the amount of the total other-than-temporary impairment related to a decrease in cash flows expected to be collected from the debt security (the credit loss), and (b) the amount of the total other-than-temporary impairment related to all other factors. The amount of the total other-than-temporary impairment related to the credit loss is recognized in earnings. The amount of the total other-than-temporary impairment related to all other factors is recognized in other comprehensive income. Equity Securities In accordance with ASC Topic 825 , Financial Instruments Loans Loans receivable that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees or costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans, generally being amortized over the contractual life of the loan. Premiums and discounts on purchased loans are amortized as adjustments to interest income using the effective yield method. The loan portfolio is segmented into commercial and consumer loans. Commercial loans consist of the following classes: commercial and industrial, commercial real estate, commercial real estate-construction and lease financing. Consumer loans consist of the following classes: residential mortgage loans, home equity loans and other consumer loans. For all classes of loans, the accrual of interest generally is discontinued when the contractual payment of principal or interest has become 90 days or more past due, or management has serious doubts about further collectability of principal or interest even though the loan is currently performing. A loan past due 90 days or more may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan is placed on nonaccrual status, unpaid interest is credited to income. Interest received on nonaccrual loans, including impaired loans, is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Nonaccrual loans may be restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time (generally, at least nine consecutive months) and the ultimate collectability of the total contractual principal and interest is no longer in doubt. The past due status of all classes of loans receivable is determined based on contractual due dates for loan payments. Commercial and Industrial Loans Mid Penn originates commercial and industrial loans. Most of the Bank’s commercial and industrial loans have been extended to finance local and regional businesses and include short-term loans to finance machinery and equipment purchases, inventory, and accounts receivable. Commercial loans also involve the extension of revolving credit for a combination of equipment acquisitions and working capital in expanding companies. The maximum term for loans extended on machinery and equipment is based on the projected useful life of such machinery and equipment. Generally, the maximum term on non-mortgage lines of credit is one year. The loan-to-value ratio on such loans and lines of credit generally may not exceed 80 percent of the value of the collateral securing the loan. The Bank’s commercial business lending policy includes credit file documentation and analysis of the borrower’s character, capacity to repay the loan, the adequacy of the borrower’s capital and collateral, as well as an evaluation of conditions affecting the borrower. Analysis of the borrower’s past, present, and future cash flows is also an important aspect of the Bank’s current credit analysis. Nonetheless, such loans are believed to carry higher credit risk than other extensions of credit. Commercial and industrial loans typically are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. As a result, the availability of funds for the repayment of commercial business loans may be substantially dependent on the success of the business itself, which, in turn, is likely to be dependent upon the general economic environment. Mid Penn’s commercial and industrial loans are usually, but not always, secured by business assets and personal guarantees. However, the collateral securing the loans may depreciate over time, may be difficult to appraise, and may fluctuate in value based on the success of the business. Commercial Real Estate and Commercial Real Estate – Construction Loans Commercial real estate and commercial real estate construction loans generally present a higher level of risk than loans secured by one-to-four family residences. This greater risk is due to several factors, including the concentration of principal in a limited number of loans and borrowers, the effect of general economic conditions on income producing properties, and the increased difficulty of evaluating and monitoring these types of loans. In addition, the repayment of loans secured by commercial real estate is typically dependent upon the successful operation of the related real estate project. If the cash flow from the project is reduced, the borrower’s ability to repay the loan may be impaired. Residential Mortgage Loans Mid Penn offers a wide array of residential mortgage loans for both permanent structures and those under construction. The Bank’s residential mortgage originations are secured primarily by properties located in its primary market and surrounding areas. Residential mortgage loans have terms up to a maximum of 30 years and with loan-to-value ratios up to 100 percent of the lesser of the appraised value of the security property or the contract price. Private mortgage insurance is generally required in an amount sufficient to reduce the Bank’s exposure to at or below the 85 percent loan to value level. Residential mortgage loans generally do not include prepayment penalties. In underwriting residential mortgage loans, the Bank evaluates both the borrower’s ability to make monthly payments and the value of the property securing the loan. Most properties securing real estate loans made by Mid Penn are appraised by independent fee appraisers. The Bank generally requires borrowers to obtain title insurance and fire and property insurance (including flood insurance, if necessary) in an amount not less than the amount of the loan. Real estate loans originated by the Bank generally contain a “due on sale” clause allowing the Bank to declare the unpaid principal balance due and payable upon the sale of the security property. The Bank underwrites residential mortgage loans to the standards established by the secondary mortgage market, i.e., Fannie Mae, Ginnie Mae, Freddie Mac, Federal Home Loan Bank, or Pennsylvania Housing Finance Agency standards, with the intention of selling the majority of residential mortgages originated into the secondary market. In the event that the facts and circumstances surrounding a residential mortgage application do not meet the required underwriting conditions of the secondary mortgage market, the Bank will evaluate the failed conditions and evaluate the potential risk of holding the residential mortgage in the Bank’s portfolio rather than rejecting the loan request. In the event that the loan is funded and held in the Bank’s portfolio, the interest rate on the residential mortgage would be increased to compensate for the added portfolio risk. Consumer Loans, Including Home Equity Credits Mid Penn offers a variety of secured consumer loans, including home equity, automobile, and deposit secured loans. In addition, the Bank offers other secured and unsecured consumer loans. Most consumer loans are originated in Mid Penn’s primary market and surrounding areas. The largest component of Mid Penn’s consumer loan portfolio consists of fixed rate home equity loans and variable rate home equity lines of credit. Substantially all home equity loans and lines of credit are secured by junior lien mortgages on principal residences. The Bank will lend amounts, which, together with all prior liens, typically may be up to 85 percent of the appraised value of the property securing the loan. Home equity term loans may have maximum terms up to 20 years, while home equity lines of credit generally have maximum terms of five years. Consumer loan terms vary according to the type and value of collateral, length of contract and creditworthiness of the borrower. The underwriting standards employed by the Bank for consumer loans include an application, a determination of the applicant’s payment history on other debts, and an assessment of ability to meet existing obligations and payments on the proposed loan. Although creditworthiness of the applicant is a primary consideration, the underwriting process also includes a comparison of the value of the collateral, if any, in relation to the proposed loan amount. Consumer loans may entail greater credit risk than do residential mortgage loans, particularly in the case of consumer loans which are unsecured or are secured by rapidly depreciable assets, such as automobiles or recreational equipment. In such cases, any repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment of the outstanding loan balance. In addition, consumer loan collections are dependent on the borrower’s continuing financial stability, and thus are more likely to be affected by adverse personal circumstances. Furthermore, the application of various federal and state laws, including bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans. Junior liens inherently have more credit risk by virtue of the fact that another financial institution may have a higher security position in the case of foreclosure liquidation of collateral to extinguish the debt. Generally, foreclosure actions could become more prevalent if the real estate market weakens and property values deteriorate. Payroll Protection Program (“PPP”) Loans Included in total loans as of March 31, 2021 within the commercial and industrial loan portfolio classification are $590,035,000 of Paycheck Protection Program (“PPP”) loans, net of deferred fees, with this total being comprised of (i) $335,589,000 of PPP 2021 loans, net of deferred fees, originated during the first quarter of 2021; and (ii) $254,446,000 of PPP 2020 loans, net of deferred fees, originated during 2020 which, as of March 31, 2021, were still outstanding as the Small Business Administration (“SBA”) had not yet completed the loan forgiveness and repayment processing. Comparatively, as of December 31, 2020, Mid Penn had $388,313,000 of PPP 2020 loans outstanding, net of deferred fees. Mid Penn has been a significant participating lender under the PPP, which was originally created when the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was signed into law on March 27, 2020, and extended by the signing of the Consolidated Appropriations Act, 2021 into law on December 27, 2020. The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term. The SBA also provided a processing fee per loan to financial institutions who participated in the PPP, with the amount of such fee generally ranging from 1 percent to 5 percent as pre-determined by the SBA dependent upon the size of each respective credit. In addition to the processing fees, Mid Penn recorded related loan origination costs. As of March 31, 2021, Mid Penn had received $36,765,000 of nonrefundable loan processing fees related to the loans disbursed as a result of Mid Penn’s participation in the PPP initiative, consisting of (i) $20,883,000 of loan processing fees received related to PPP loans funded during the year ended December 31, 2020, and (ii) $15,882,000 of loan processing fees received related to PPP loans funded during the three months ended March 31, 2021. The balance of these fees that have not yet been realized as income, and the related loan origination costs are deferred in accordance with ASC 310-20, Receivables—Nonrefundable Fees and Other Costs Allowance for Loan and Lease Losses The allowance for credit losses (“allowance”) and the related provision reflect Mid Penn’s continued application of the incurred loss method for estimating credit losses as Mid Penn is not required to adopted the current expected credit loss (“CECL”) accounting standard until January 1, 2023. The allowance consists of (i) the allowance for loan and lease losses, and (ii) the reserve for unfunded lending commitments. The allowance for loan and lease losses represents management’s estimate of losses inherent in the loan portfolio as of the balance sheet date and is recorded as a reduction to loans. The reserve for unfunded lending commitments represents management’s estimate of losses inherent in its unfunded loan commitments and is recorded in other liabilities on the consolidated balance sheet. The reserve for unfunded lending commitments was $66,000 at March 31, 2021 and December 31, 2020. The allowance is increased by the provision for loan and lease losses, and decreased by charge-offs, net of recoveries. Loans deemed to be uncollectible are charged against the allowance, and subsequent recoveries, if any, are credited to the allowance. All, or part, of the principal balance of loans are charged off to the allowance as soon as it is determined that the repayment of all, or part, of the principal balance is highly unlikely. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, or earlier in the event of either bankruptcy or if there is an amount deemed uncollectible. Because all identified losses are immediately charged off, no portion of the allowance is restricted to any individual loan or groups of loans, and the entire allowance is available to absorb any and all loan losses. The allowance is maintained at a level considered by management to be adequate to provide for losses that can be reasonably anticipated. Management performs a monthly evaluation of the adequacy of the allowance. The allowance is based on Mid Penn’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions, and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are classified as impaired. For loans that are classified as impaired, an allowance is established when the discounted cash flows, collateral value, or observable market price of the impaired loan is lower than the carrying value of that loan. The general component covers pools of loans by loan class including commercial loans not considered impaired, as well as smaller balance homogeneous loans, such as residential real estate, home equity and other consumer loans. These pools of loans are evaluated for loss exposure based upon historical loss rates for each of these categories of loans, adjusted for qualitative factors. These qualitative risk factors include changes in economic conditions, fluctuations in loan quality measures, changes in collateral values, changes in the experience of the lending staff and loan review systems, changes in lending policies and procedures (including underwriting standards), changes in the mix and volume of loans originated, the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the existing loan portfolio, shifting industry or portfolio concentrations, and other relevant factors. Each factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. Adjustments to the factors are supported through documentation of changes in conditions in relevant analyses and a narrative accompanying the allowance for loan loss calculation. The unallocated component of the allowance for loan and lease losses covers several considerations that are not specifically measurable through either the specific and general components. For example, at times Mid Penn could face increasing credit risks and uncertainties, not yet reflected in recent historical losses or qualitative factor assessments, associated with unpredictable changes in economic growth or business conditions in our markets or for certain industries in which we have commercial loan borrowers, or unanticipated stresses to the values of real estate held as collateral, or unforeseeable effects on the portfolio from other influences, inducing the long-term impact of the pandemic. Any or all of these additional issues can adversely affect our borrowers’ ability to timely repay their loans. Mid Penn generally considers a commercial loan (consisting of commercial and industrial, commercial real estate, commercial real estate-construction, and lease financing loan classes) to be impaired when it becomes 90 days or more past due and not in the process of collection, or sooner when it is probable that Mid Penn will be unable to collect all contractual principal and interest due. This methodology assumes the borrower cannot or will not continue to make additional payments. At that time, the loan would generally be considered collateral dependent as the discounted cash flow method would generally indicate no operating income available for evaluating the collateral position; therefore, most impaired loans are deemed to be collateral dependent. In addition, Mid Penn’s rating system assumes any loans classified as nonaccrual, included in the substandard rating, to be impaired, and most of these loans are considered collateral dependent; therefore, most of Mid Penn’s impaired loans, whether reporting a specific allocation or not, are considered collateral dependent. Mid Penn evaluates loans for charge-off on a monthly basis. Policies that govern the recommendation for charge-off are unique to the type of loan being considered. Commercial loans classified as substandard nonaccrual, doubtful, having probable loss will first have a collateral evaluation completed in accordance with the guidance on impaired loans. Once the collateral evaluation has been completed, a specific allocation of allowance is made based upon the results of the evaluation. The remaining balance remains a nonperforming loan with the original terms and interest rate intact (not restructured). In the event the loan is unsecured, the loan would have been charged-off at the recognition of impairment. Commercial real estate loans determined to be impaired will also have an initial collateral evaluation completed in accordance with the guidance on impaired loans. An updated real estate valuation is ordered and the collateral evaluation is modified to reflect any variations in value. A specific allocation of allowance is made for any anticipated collateral shortfall. The remaining balance remains a nonperforming loan with the original terms and interest rate intact (not restructured). The process of charging off a residential mortgage loan begins when a loan becomes delinquent for 90 days and is not in the process of collection. The existing appraisal is reviewed and a lien search is obtained to determine lien position and any instances of intervening liens. A new appraisal of the property will be ordered if deemed necessary by management and a collateral evaluation is completed. The loan will then be charged down to the value indicated in the evaluation. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, or earlier in the event of either bankruptcy or if there is an amount deemed uncollectible. The collateral shortfall of the consumer loan is recommended for charge-off at this point. As noted above, Mid Penn assesses a specific allocation for commercial loans and commercial real estate loans. The remaining balance remains a nonperforming loan with the original terms and interest rate intact (not restructured). In addition, Mid Penn takes a preemptive step when any commercial loan becomes classified under its internal classification system. A preliminary collateral evaluation, in accordance with the guidance on impaired loans, is prepared using the existing collateral information in the loan file. This process allows Mid Penn to review both the credit and documentation files to determine the status of the information needed to make a collateral evaluation. This collateral evaluation is preliminary, but allows Mid Penn to determine if any potential collateral shortfalls exist. It is Mid Penn’s policy to obtain updated third-party collateral valuations on all impaired loans secured by real estate as soon as practically possible following the credit being classified as substandard nonaccrual. Prior to receipt of the updated real estate valuation, Mid Penn will use any existing real estate valuation to determine any potential allowance issues; however, no allowance recommendation will be made until such time Mid Penn is in receipt of the updated valuation. The Asset Recovery department employs an electronic tracking system to monitor the receipt of and need for updated appraisals. To date, there have been no material time lapses noted with the above processes. In some instances, Mid Penn is not holding real estate as collateral and is relying on business assets (personal property) for repayment. In these circumstances, a collateral inspection is performed by Mid Penn personnel to determine an estimated value. The value is based on net book value, as provided by the financial statements, and discounted accordingly based on determinations made by management. Occasionally, Mid Penn will employ an outside service to provide a fair estimate of value based on auction sales or private sales. Management reviews the estimates of these third parties and discounts them accordingly based on management’s judgment, if deemed necessary. For impaired loans with no valuation allowance required, the independent third party market valuations on the subject property obtained by Mid Penn as soon as practically possible following the credit being placed on nonaccrual status sometimes indicates that the loan-to-value ratio is sufficient to obviate the need for a specific allocation in spite of significant deterioration in real estate values in Mid Penn’s primary market area. These circumstances are determined on a case by case analysis of the impaired loans. Mid Penn actively monitors the values of collateral on impaired loans. This monitoring may require the modification of collateral values over time or changing circumstances by some factor, either positive or negative, from the original values. All collateral values will be assessed by management at least every 12 months for possible revaluation by an independent third party. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, Mid Penn does not separately identify individual residential mortgage loans, home equity loans and other consumer loans for impairment disclosures, unless such loans are the subject of a troubled debt restructuring agreement. Loans whose terms are modified are classified as troubled debt restructurings if the borrowers have been granted concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a troubled debt restructuring generally involve a temporary reduction in interest rate or an extension of a loan’s stated maturity date. Nonaccrual troubled debt restructurings are restored to accrual status if principal and interest payments, under the modified terms, are current for nine consecutive months after modification. Loans classified as troubled debt restructurings are designated as impaired. The allowance calculation methodology includes segregation of loan classes into risk rating categories. The borrower’s overall financial condition, repayment sources, guarantors, and value of collateral, if appropriate, are evaluated annually for commercial loans or when credit deficiencies arise, such as delinquent loan payments. Credit quality risk ratings include regulatory classifications of special mention, substandard, doubtful, and loss. Loans criticized as special mention have potential weaknesses that deserve management’s close attention. If uncorrected, the potential weaknesses may result in deterioration of the repayment prospects. Loans classified substandard have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They include loans that are inadequately protected by the current sound net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans classified doubtful have all the weaknesses inherent in loans classified substandard with the added characteristic that collection or liquidation in full, on the basis of current conditions and facts, is highly improbable. Loans classified as a loss are considered uncollectible and are charged to the allowance for loan losses. Any loans not classified as noted above are rated pass. In addition, federal and state regulatory agencies, as an integral part of their examination process, periodically review the Bank’s allowance and may require the Bank to recognize additions to the allowance based on their judgments about information available to them at the time of their examination, which may not be currently available to management. No such additions were required from any recent examinations. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate. Mid Penn had $590,035,000 and $388,313,000 of PPP loans outstanding, net of deferred fees, as of March 31, 2021 and December 31, 2020, respectively, which are guaranteed by the Small Business Administration and, thus, have no loss reserve allocated to that pool. Acquired Loans Loans that Mid Penn acquires in connection with business combinations are recorded at fair value with no carryover of the acquired entity’s related allowance for loan losses. Loans acquired at fair value and included in the balance of loans and leases, net of unearned interest on the Consolidated Balance Sheets totaled $251,644,000 and $276,701,000 as of March 31, 2021 and December 31, 2020, respectively. The fair value of the acquired loans involves estimating the amount and timing of principal and interest cash flows expected to be collected on the loans, and discounting those cash flows at a market rate of interest. The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable discount. These loans are accounted for under ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. Loans acquired through business combinations that meet the specific criteria of ASC 310-30 are individually evaluated each period to analyze expected cash flows. To the extent that the expected cash flows of a loan have decreased due to credit deterioration, Mid Penn establishes an allowance. Loans acquired through business combinations that do not meet the specific criteria of ASC 310-30 are accounted for under ASC 310-20. These loans are initially recorded at fair value, and include credit and interest rate marks associated with acquisition accounting adjustments. Purchase premiums or discounts are subsequently amortized as an adjustment to yield over the estimated contractual lives of the loans. There is no allowance for loan losses established at the acquisition date for acquired performing loans. An allowance for loan losses is recorded for any credit deterioration in these loans subsequent to acquisition. Acquired loans that met the criteria for impaired or nonaccrual of interest prior to the acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if Mid Penn expects to fully collect the new carrying value (i.e. fair value) of the loans. As such, Mid Penn may no longer consider the loan to be nonaccrual or nonperforming at the date of acquisition and may accrue interest on these loans, including the impact of any accretable discount. In addition, charge-offs on such loans would be first applied to the nonaccretable difference portion of the fair value adjustment. Loan-Level Interest Rate Swaps Beginning during the second quarter of 2020, Mid Penn entered into loan-level interest rate swaps (“swaps”) to facilitate certain customer transactions and meet their financing needs. These swaps qualify as derivatives, but are not designated as hedging instruments. A loan-level interest rate swap is a contract in which the series of interest rate flows (fixed and variable) are exchanged over the term of a loan with certain qualifying commercial loan customers, and Mid Penn simultaneously enters into an interest rate swap with a dealer counterparty with identical notional amounts and terms. The net result of these swaps is that the customer pays a fixed interest rate and Mid Penn receives a floating interest rate. The swap positions with customers are equally offset with the dealer counterparties to minimize the potential impact on Mid Penn’s financial statements. Pursuant to our agreements with the dealer counterparties, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current po

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2021
Securities Financing Transactions Disclosures [Abstract]
Investment Securities	(3) Investment Securities The majority of the investment portfolio is comprised of securities issued by U.S. Treasury and government agencies, and state and political subdivision obligations. The amortized cost, fair value, and unrealized gains and losses on investment securities at March 31, 2021 and December 31, 2020 are as follows: (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value March 31, 2021 Available-for-sale debt securities: Mortgage-backed U.S. government agencies $ 2 $ — $ — $ 2 Corporate debt securities 3,250 — 2 3,248 Total available-for-sale debt securities 3,252 — 2 3,250 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 16,980 $ 46 $ 420 $ 16,606 Mortgage-backed U.S. government agencies 35,727 866 3 36,590 State and political subdivision obligations 65,335 2,455 53 67,737 Corporate debt securities 12,518 151 83 12,586 Total held-to-maturity debt securities 130,560 3,518 559 133,519 Total $ 133,812 $ 3,518 $ 561 $ 136,769 (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value December 31, 2020 Available-for-sale debt securities: Mortgage-backed U.S. government agencies $ 2 $ — $ — $ 2 Corporate debt securities 5,750 — 4 5,746 Total available-for-sale debt securities 5,752 — 4 5,748 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 11,511 $ 66 $ — $ 11,577 Mortgage-backed U.S. government agencies 40,810 948 15 41,743 State and political subdivision obligations 65,449 3,295 6 68,738 Corporate debt securities 10,522 215 1 10,736 Total held-to-maturity debt securities 128,292 4,524 22 132,794 Total $ 134,044 $ 4,524 $ 26 $ 138,542 Estimated fair values of debt securities are based on quoted market prices, where applicable. If quoted market prices are not available, fair values are based on quoted market prices of instruments of a similar type, credit quality and structure, adjusted for differences between the quoted instruments and the instruments being valued. Please refer to Note 7, Fair Value Measurement Investment securities having a fair value of $105,650,000 at March 31, 2021 and $102,959,000 at December 31, 2020 were pledged to secure public deposits, some trust account holdings, and certain other borrowings. In accordance with legal provisions for alternatives other than pledging of investments, Mid Penn also obtains letters of credit from the Federal Home Loan Bank of Pittsburgh (“FHLB”) to secure certain public deposits. These FHLB letter of credit commitments totaled $263,800,000 as of March 31, 2021 and $288,950,000 as of December 31, 2020. The following tables present gross unrealized losses and fair value of debt security investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2021 and December 31, 2020. (Dollars in thousands) Less Than 12 Months 12 Months or More Total Number Number Number of Fair Unrealized of Fair Unrealized of Fair Unrealized March 31, 2021 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale debt securities: Corporate debt securities 1 $ 998 $ 2 0 $ — $ — 1 $ 998 $ 2 Total temporarily impaired available-for-sale debt securities 1 $ 998 $ 2 0 $ — $ — 1 $ 998 $ 2 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies 7 $ 11,570 $ 420 0 $ — $ — 7 $ 11,570 $ 420 Mortgage-backed U.S. government agencies 3 1,835 3 0 — — 3 1,835 3 State and political subdivision obligations 13 6,152 53 0 — — 13 6,152 53 Corporate debt securities 4 4,916 83 0 — — 4 4,916 83 Total temporarily impaired held-to-maturity debt securities 27 $ 24,473 $ 559 0 $ — $ — 27 $ 24,473 $ 559 Total 28 $ 25,471 $ 561 0 $ — $ — 28 $ 25,471 $ 561 (Dollars in thousands) Less Than 12 Months 12 Months or More Total Number Number Number of Fair Unrealized of Fair Unrealized of Fair Unrealized December 31, 2020 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale securities: Corporate debt securities 2 $ 3,497 $ 4 0 $ — $ — 2 $ 3,497 $ 4 Total temporarily impaired available-for-sale securities 2 $ 3,497 $ 4 0 $ — $ — 2 $ 3,497 $ 4 Held-to-maturity securities: Mortgage-backed U.S. government agencies 8 $ 5,336 $ 15 0 $ — $ — 8 $ 5,336 $ 15 State and political subdivision obligations 2 801 6 0 — — 2 801 6 Corporate debt securities 1 449 1 0 — — 1 449 1 Total temporarily impaired held to maturity securities 11 $ 6,586 $ 22 0 $ — $ — 11 $ 6,586 $ 22 Total 13 $ 10,083 $ 26 0 $ — $ — 13 $ 10,083 $ 26 Management evaluates securities for other-than-temporary impairment on at least a quarterly basis, and more frequently when economic or market concerns warrant such additional evaluation. Consideration is given to the length of time and the extent to which the fair value of the security has been less than amortized cost, as well as the overall financial condition of the issuer. In addition, for debt securities, Mid Penn considers (i) whether management has the intent to sell the security, (ii) whether it is more likely than not that management will be required to sell the security prior to its anticipated recovery, and (iii) whether management expects to recover the entire amortized cost basis. At March 31, 2021, the majority of securities in an unrealized loss position were U.S. government agency securities and state and political subdivision obligations. At December 31, 2020, the majority of securities in an unrealized loss position were U.S. government agency and mortgage-back U.S. government agency securities. Mid Penn had no securities considered by management to be other-than-temporarily impaired as of March 31, 2021, December 31, 2020, or March 31, 2020, and did not record any securities impairment charges in the respective periods ended on these dates. This determination reflects management’s assessment that no securities in its portfolio were impaired as a result of any COVID-19 pandemic impacts, to date, to the underlying issuers of securities. Mid Penn does not consider the securities with unrealized losses on the respective dates to be other-than-temporarily impaired as the unrealized losses were deemed to be temporary changes in value related to market movements in interest yields at various periods similar to the maturity dates of holdings in the investment portfolio, and not reflective of an erosion of credit quality. Gross realized gains and losses on sales of available-for-sale debt securities for the three months ended March 31, 2021 and 2020 are shown in the table below. No sales of available-for-sale securities were executed during the three months ended March 31, 2021. (Dollars in thousands) Three Months Ended March 31, 2021 2020 Realized gains $ — $ 137 Realized losses — (5 ) Net gains $ — $ 132 The table below illustrates the maturity distribution of investment securities at amortized cost and fair value as of March 31, 2021. (Dollars in thousands) Available-for-sale Held-to-maturity Amortized Fair Amortized Fair March 31, 2021 Cost Value Cost Value Due in 1 year or less $ — $ — $ 3,465 $ 3,511 Due after 1 year but within 5 years 2,250 2,250 38,808 40,397 Due after 5 years but within 10 years 1,000 998 52,560 53,021 Due after 10 years — — — — 3,250 3,248 94,833 96,929 Mortgage-backed securities 2 2 35,727 36,590 $ 3,252 $ 3,250 $ 130,560 $ 133,519

Loans and Allowance for Loan an

Loans and Allowance for Loan and Lease Losses	3 Months Ended
	Mar. 31, 2021
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Loans and Allowance for Loan and Lease Losses	( 4 ) Loans and Allowance for Loan and Lease Losses As of March 31, 2021 and December 31, 2020, the types of loans in Mid Penn’s portfolio, summarized using Mid Penn’s internal risk rating system between those rated “pass” (net of deferred fees and costs of $17,992,000 as of March 31, 2021 and $9,084,000 as of December 31, 2020) which comprise the vast majority of the portfolio, and those classified as “special mention” and “substandard”, are as follows: (Dollars in thousands) Special March 31, 2021 Pass Mention Substandard Total Commercial and industrial $ 951,489 $ 10,272 $ 2,284 $ 964,045 Commercial real estate 1,119,845 8,905 6,910 1,135,660 Commercial real estate - construction 264,915 — 30 264,945 Residential mortgage 196,566 52 1,170 197,788 Home equity 73,087 2 2,334 75,423 Consumer 8,375 — — 8,375 $ 2,614,277 $ 19,231 $ 12,728 $ 2,646,236 (Dollars in thousands) Special December 31, 2020 Pass Mention Substandard Total Commercial and industrial $ 739,306 $ 9,928 $ 3,120 $ 752,354 Commercial real estate 1,084,123 1,708 13,825 1,099,656 Commercial real estate - construction 248,882 — 31 248,913 Residential mortgage 200,544 53 1,244 201,841 Home equity 71,856 3 2,365 74,224 Consumer 7,053 — — 7,053 $ 2,351,764 $ 11,692 $ 20,585 $ 2,384,041 The increase in deferred fees and costs from December 31, 2020 to March 31, 2021 was the result of collected but unearned PPP loan processing fees related to the PPP 2021 loans which Mid Penn processed and disbursed during the first quarter of 2021. All PPP loans, whether disbursed in 2020 or 2021, are included in commercial and industrial loans and are fully guaranteed by the SBA; therefore, all PPP loans outstanding (net of the related deferred PPP fees) are classified as “pass” within Mid Penn’s internal risk rating system as of March 31, 2021. Mid Penn had no loans classified as “doubtful” as of March 31, 2021 and December 31, 2020. Impaired loans by loan portfolio class as of March 31, 2021 and December 31, 2020 are summarized as follows: March 31, 2021 December 31, 2020 (Dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded: Commercial and industrial $ 143 $ 174 $ — $ 899 $ 931 $ — Commercial real estate 595 973 — 8,215 8,574 — Commercial real estate - construction 30 34 — 31 34 — Residential mortgage 758 786 — 818 842 — Home equity 2,334 2,337 — 2,365 2,395 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ — $ — $ — $ — Commercial real estate 1,408 1,690 — 1,419 1,693 — Commercial real estate - construction — — — — — — Residential mortgage 309 557 — 323 568 — Home equity — 12 — — 13 — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 225 $ 253 $ 68 $ 553 $ 574 $ 533 Commercial real estate 874 926 263 887 994 274 Commercial real estate - construction — — — — — — Residential mortgage — — — — — — Home equity — — — — — — Consumer — — — — — — Total Impaired Loans: Commercial and industrial $ 368 $ 427 $ 68 $ 1,452 $ 1,505 $ 533 Commercial real estate 2,877 3,589 263 10,521 11,261 274 Commercial real estate - construction 30 34 — 31 34 — Residential mortgage 1,067 1,343 — 1,141 1,410 — Home equity 2,334 2,349 — 2,365 2,408 — Consumer — — — — — — The average recorded investment of impaired loans and related interest income recognized for the three months ended March 31, 2021 and 2020 are summarized as follows: Three Months Ended March 31, 2021 March 31, 2020 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 753 $ — $ 890 $ — Commercial real estate 4,405 — 7,430 — Commercial real estate - construction 31 — 40 — Residential mortgage 787 8 782 6 Home equity 2,350 — 24 — Consumer — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ 2 $ — Commercial real estate 1,414 — 1,420 — Commercial real estate - construction — — — — Residential mortgage 317 — 374 — Home equity — — 1 — Consumer — — — — With an allowance recorded: Commercial and industrial $ 157 $ — $ 4 $ — Commercial real estate 880 — 550 — Commercial real estate - construction — — — — Residential mortgage — — — — Home equity — — — — Consumer — — — — Total Impaired Loans: Commercial and industrial $ 910 $ — $ 896 $ — Commercial real estate 6,699 — 9,400 — Commercial real estate - construction 31 — 40 — Residential mortgage 1,104 8 1,156 6 Home equity 2,350 — 25 — Consumer — — — — Nonaccrual loans by loan portfolio class, including loans acquired with credit deterioration, as of March 31, 2021 and December 31, 2020 are summarized as follows: (Dollars in thousands) March 31, 2021 December 31, 2020 Commercial and industrial $ 368 $ 1,452 Commercial real estate 2,877 10,520 Commercial real estate - construction 30 31 Residential mortgage 611 679 Home equity 2,334 2,365 $ 6,220 $ 15,047 The performance and credit quality of the loan portfolio is also monitored by analyzing the age of the loans receivable as determined by the length of time a recorded payment is past due. The classes of the loan portfolio summarized by the past due status as of March 31, 2021 and December 31, 2020 are summarized as follows: Loans (Dollars in thousands) 30-59 60-89 Greater Receivable > Days Past Days Past than 90 Total Past 90 Days and March 31, 2021 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ 800 $ 32 $ 336 $ 1,168 $ 962,877 $ 964,045 $ — Commercial real estate 101 555 863 1,519 1,132,733 1,134,252 — Commercial real estate - construction — — — — 264,945 264,945 — Residential mortgage 236 1 227 464 197,015 197,479 — Home equity 309 — 2,312 2,621 72,802 75,423 — Consumer — 4 — 4 8,371 8,375 — Loans acquired with credit deterioration: Commercial and industrial — — — — — — — Commercial real estate — — 1,395 1,395 13 1,408 — Commercial real estate - construction — — — — — — — Residential mortgage — — 159 159 150 309 — Home equity — — — — — — — Consumer — — — — — — — Total $ 1,446 $ 592 $ 5,292 $ 7,330 $ 2,638,906 $ 2,646,236 $ — Loans (Dollars in thousands) 30-59 60-89 Greater Receivable > Days Past Days Past than 90 Total Past 90 Days and December 31, 2020 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ 365 $ 1,017 $ 1,377 $ 2,759 $ 749,595 $ 752,354 $ — Commercial real estate 1,096 — 7,668 8,764 1,089,473 1,098,237 — Commercial real estate - construction — — — — 248,913 248,913 — Residential mortgage 126 — 282 408 201,110 201,518 — Home equity 71 22 2,343 2,436 71,788 74,224 — Consumer — 6 — 6 7,047 7,053 — Loans acquired with credit deterioration: Commercial and industrial — — — — — — — Commercial real estate 9 — 1,402 1,411 8 1,419 — Commercial real estate - construction — — — — — — — Residential mortgage — — 168 168 155 323 — Home equity — — — — — — — Consumer — — — — — — — Total $ 1,667 $ 1,045 $ 13,240 $ 15,952 $ 2,368,089 $ 2,384,041 $ — The allowance for loan losses and the related loan loss provision for the periods presented reflect Mid Penn’s continued application of the incurred loss method for estimating credit losses, as Mid Penn is not required to adopt the current expected credit loss (“CECL”) accounting standard until January 1, 2023. PPP loans, both those disbursed in 2020 and those disbursed in 2021, are included in the commercial and industrial classification and, as the PPP loans are fully guaranteed by the Small Business Administration, no allowance for loan losses was recorded against the $590,035,000 balance of PPP loans outstanding (net of related deferred PPP fees) as of March 31, 2021. The following tables summarize the allowance and recorded investments in loans receivable. (Dollars in thousands) As of, and for the three months ended, March 31, 2021 Commercial and industrial Commercial real estate Commercial real estate - construction Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance, January 1, 2021 $ 3,066 $ 8,655 $ 134 $ 429 $ 507 $ 1 $ 590 $ 13,382 Charge-offs (859 ) — — (3 ) — (3 ) — (865 ) Recoveries 1 56 — 9 — 8 — 74 Provisions (credits) 780 233 (12 ) 3 21 (5 ) (20 ) 1,000 Ending balance, March 31, 2021 2,988 8,944 122 438 528 1 570 13,591 Individually evaluated for impairment 68 263 — — — — — 331 Ending balance: Collectively evaluated for impairment $ 2,920 $ 8,681 $ 122 $ 438 $ 528 $ 1 $ 570 $ 13,260 Loans receivables: Ending balance $ 964,045 $ 1,135,660 $ 264,945 $ 197,788 $ 75,423 $ 8,375 $ — $ 2,646,236 Ending balance: individually evaluated for impairment 368 1,469 30 758 2,334 — — 4,959 Ending balance: acquired with credit deterioration — 1,408 — 309 — — — 1,717 Ending balance: collectively evaluated for impairment $ 963,677 $ 1,132,783 $ 264,915 $ 196,721 $ 73,089 $ 8,375 $ — $ 2,639,560 (Dollars in thousands) December 31, 2020 Commercial and industrial Commercial real estate Commercial real estate - construction Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Ending balance $ 3,066 $ 8,655 $ 134 $ 429 $ 507 $ 1 $ 590 $ 13,382 Ending balance: individually evaluated for impairment 533 274 — — — — — 807 Ending balance: collectively evaluated for impairment $ 2,533 $ 8,381 $ 134 $ 429 $ 507 $ 1 $ 590 $ 12,575 Loans receivable: Ending balance $ 752,354 $ 1,099,656 $ 248,913 $ 201,841 $ 74,224 $ 7,053 $ — $ 2,384,041 Ending balance: individually evaluated for impairment 1,452 9,102 31 818 2,365 — — 13,768 Ending balance: acquired with credit deterioration — 1,419 — 323 — — — 1,742 Ending balance: collectively evaluated for impairment $ 750,902 $ 1,089,135 $ 248,882 $ 200,700 $ 71,859 $ 7,053 $ — $ 2,368,531 (Dollars in thousands) As of, and for the three months ended, March 31, 2020 Commercial and industrial Commercial real estate Commercial real estate - construction Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance, January 1, 2020 $ 2,341 $ 6,259 $ 51 $ 417 $ 442 $ 2 $ 3 $ 9,515 Charge-offs (43 ) — — — — (15 ) — (58 ) Recoveries 1 1 — 3 — 2 — 7 Provisions (credits) 128 370 6 16 6 13 11 550 Ending balance, March 31, 2020 2,427 6,630 57 436 448 2 14 10,014 Individually evaluated for impairment 3 190 — — — — — 193 Ending balance: collectively evaluated for impairment $ 2,424 $ 6,440 $ 57 $ 436 $ 448 $ 2 $ 14 $ 9,821 Loans receivables: Ending balance $ 351,339 $ 939,995 $ 205,248 $ 230,047 $ 64,610 $ 6,910 $ — $ 1,798,149 Ending balance: individually evaluated for impairment 897 7,649 39 748 24 — — 9,357 Ending balance: acquired with credit deterioration — 1,423 — 368 1 — — 1,792 Ending balance: collectively evaluated for impairment $ 350,442 $ 930,923 $ 205,209 $ 228,931 $ 64,585 $ 6,910 $ — $ 1,787,000 Mid Penn entered into forbearance or modification agreements on loans currently classified as troubled debt restructures and these agreements have resulted in additional principal repayment. The terms of these forbearance agreements vary and generally involve modifications from the original loan agreements, including either a reduction in the amount of principal payments for certain or extended periods, interest rate reductions, and/or the intent for the loan to be repaid as collateral is sold. Mid Penn’s troubled debt restructured loans at March 31, 2021 totaled $1,448,000 and included: (i) three accruing impaired residential mortgage loans to unrelated borrowers in compliance with the terms of the modifications totaling $457,000, and (ii) $991,000 of troubled debt restructurings attributable to nine loans among seven relationships which were classified as nonaccrual impaired based upon a collateral evaluation in accordance with the guidance on impaired loans. The balance of these nonaccrual impaired troubled debt restructured loans as of March 31, 2021 was comprised of $911,000 in commercial real estate loans amongst three borrowers, one commercial real estate construction loan for $30,000, two residential mortgage loans for $44,000, and one commercial and industrial loan for $6,000. As of March 31, 2021, there were no defaulted troubled debt restructured loans, as all troubled debt restructured loans were current with respect to their associated forbearance agreements. Mid Penn’s troubled debt restructured loans at December 31, 2020 totaled $1,480,000, and included: (i) three accruing impaired residential mortgage loans to unrelated borrowers in compliance with the terms of the modifications totaling $463,000, and (ii) $1,017,000 of troubled debt restructurings attributable to nine loans among seven relationships which were classified as nonaccrual impaired based upon a collateral evaluation in accordance with the guidance on impaired loans. One large commercial real estate relationship accounted for $535,000 of the total $1,017,000 in nonaccrual impaired troubled debt restructured loans, with the remainder consisting of (i) four commercial real estate loans totaling $398,000 among two relationships, (ii) one commercial real estate – construction loan totaling $31,000, (iii) one commercial and industrial loan totaling $6,000, and (iv) two unrelated residential mortgage loans totaling $47,000. As of December 31, 2020, there were no defaulted troubled debt restructured loans, as all troubled debt restructured loans were current with respect to their associated forbearance agreements. There were also no defaults on troubled debt restructured loans within twelve months of restructure during 2020. The recorded investments in troubled debt restructured loans at March 31, 2021 and December 31, 2020 are as follows: (Dollars in thousands) Pre-Modification Post-Modification March 31, 2021 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 8 $ 8 $ 6 Commercial real estate 1,806 1,707 911 Commercial real estate - construction 40 40 30 Residential mortgage 728 725 501 $ 2,582 $ 2,480 $ 1,448 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2020 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 8 $ 8 $ 6 Commercial real estate 1,806 1,707 933 Commercial real estate - construction 40 40 31 Residential mortgage 728 725 510 $ 2,582 $ 2,480 $ 1,480 The CARES Act, along with a joint agency statement issued by banking agencies, provides that short-term modifications made in response to COVID-19 do not need to be accounted for as troubled debt restructurings. Depending upon the specific needs and circumstances affecting each borrower, the majority of these modifications ranged from deferrals of both principal and interest payments, with some borrowers reverting to interest-only payments. The majority of the deferrals were granted for a period of three months, but some as long as six months, depending upon management’s specific evaluation of each borrower’s circumstances. Interest has and will continue to accrue on loans modified under the CARES Act during the deferral period. As of March 31, 2021, the principal balance of loans remaining in a CARES Act qualifying deferment status totaled $5,131,000, or less than 1 percent of the total loan portfolio, a reduction compared to December 31, 2020, when $11,681,000 of loans, also representing less than 1 percent of the total loan portfolio, were in this deferment status. Most borrowers who were granted a CARES Act deferral in 2020 have returned to regular payment status. Mid Penn remains in communication with each of the borrowers still in deferral status to assess the ongoing credit standing of the borrowers, and may make further adjustments to a borrower’s relationship at some future time if warranted for the specific situation. The following tables provide activity for the accretable yield of acquired impaired loans from the Phoenix (March 2015), Scottdale (January 2018), and First Priority (July 2018) acquisitions for the three months ended March 31, 2021 and 2020. (Dollars in thousands) Three Months Ended March 31, 2021 2020 Accretable yield, beginning of period $ 40 $ 89 Accretable yield amortized to interest income — (17 ) Accretable yield, end of period $ 40 $ 72

Leases

Leases	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	(5) Leases On January 1, 2019, Mid Penn adopted ASU No. 2016-02, Leases As of the January 1, 2019 adoption date, Mid Penn leased twenty-four branch locations under non-cancelable operating leases, which expire at various dates through the year ending December 31, 2035. Three of Mid Penn’s operating leases are with related parties. Subsequent to the adoption of Topic 842, Mid Penn entered into a lease agreement for one facility under a non-cancelable finance lease, which commenced March 1, 2019 and expires February 28, 2039. In 2016, Mid Penn entered into a subleasing agreement with an unrelated party on one of its properties under an operating lease. The sublease included an escalation clause. The initial term of the sublease agreement began on July 1, 2016 and ended on March 31, 2021, and was extended for an additional one-year Operating and finance lease right-of-use assets, as well as operating lease liabilities, are presented as separate line items on the Consolidated Balance Sheet, while finance lease liabilities are classified as a component of long-term debt. Mid Penn has elected not to include short-term leases (i.e., leases with initial terms of twelve months or less) or equipment leases (deemed immaterial) on the Consolidated Balance Sheets. There were no sale and leaseback transactions, leveraged leases, or leases that had not commenced as of March 31, 2021. Below is a summary of the operating and finance lease right-of-use assets and related lease liabilities, as well as the weighted average lease term (in years) and weighted average discount rate for each of the lease classifications as of March 31, 2021 and December 31, 2020. (Dollars in thousands) March 31, 2021 December 31, 2020 Operating Leases Finance Lease Operating Leases Finance Lease Right of use asset $ 10,791 $ 3,222 $ 10,157 $ 3,267 Lease liability $ 11,828 $ 3,446 $ 11,200 $ 3,467 Weighted average remaining lease term (in years) 7.81 17.92 8.05 18.17 Weighted average discount rate 3.15 % 3.81 % 3.30 % 3.81 % A summary of lease costs during the three months ended March 31, 2021 and 2020 are presented below. Interest expense on finance lease liabilities is included in other interest expense, while all other lease costs are included in occupancy expense on Mid Penn’s Consolidated Statements of Income. (Dollars in thousands) Three Months Ended March 31, 2021 2020 Finance lease cost: Amortization of right-of-use asset $ 45 $ 45 Interest expense on lease liability 33 34 Total finance lease cost 78 79 Operating lease cost 516 528 Short-term and equipment lease cost 10 9 Variable lease cost — — Sublease income (9 ) (6 ) Total lease costs $ 595 $ 610 A summary of cash paid for amounts included in the measurement of lease liabilities is presented below. (Dollars in thousands) Three Months Ended March 31, 2021 March 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 33 $ 34 Operating cash flows from operating leases 522 544 Financing cash flows from finance leases 21 21 A maturity analysis of operating and finance lease liabilities and a reconciliation of the undiscounted cash flows to the total operating and finance lease liability amounts is presented below. (Dollars in thousands) March 31, 2021 Operating Leases Finance Lease Lease payments due: Within one year $ 1,557 $ 163 After one but within two years 2,061 217 After two but within three years 1,815 217 After three but within four years 1,760 252 After four but within five years 1,373 259 After five years 4,810 3,733 Total undiscounted cash flows 13,376 4,841 Discount on cash flows (1,548 ) (1,395 ) Total lease liability $ 11,828 $ 3,446

Loan-Level Interest Rate Swaps

Loan-Level Interest Rate Swaps	3 Months Ended
	Mar. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Loan-Level Interest Rate Swaps	(6) Loan-Level Interest Rate Swaps Mid Penn enters into loan-level interest rate swaps with certain qualifying, creditworthy commercial loan customers to provide a loan pricing structure that meets both Mid Penn’s and the customer’s interest rate risk management needs. Mid Penn simultaneously enters into parallel interest rate swaps with dealer counterparties, with identical notional amounts and terms. The net result of the offsetting customer and dealer counterparty swap agreements is that the customer pays a fixed rate of interest and Mid Penn receives a floating rate. Mid Penn’s loan-level i nterest rate swaps are considered derivatives but are not accounted for using hedge accounting. The fair value, notional amount, and collateral posted related to loan-level interest rate swaps are presented below. (Dollars in thousands) March 31, 2021 December 31, 2020 Interest Rate Swap Contracts - Commercial Loans: Fair Value (a) $ 1,185 $ 489 Notional Amount 48,864 22,331 Cash Collateral Posted (b) 500 500 (a) Included in other liabilities as of March 31, 2021 and other assets as of December 31, 2020, respectively, on the Consolidated Balance Sheets (b) Included in cash and due from banks on the Consolidated Balance Sheet The gross amounts of commercial loan swap derivatives, the amounts offset and the carrying values in the Consolidated Balance Sheets, and the collateral pledged to support such agreements are presented below. (Dollars in thousands) March 31, 2021 December 31, 2020 Interest Rate Swap Contracts - Commercial Loans: Gross amounts recognized $ 1,185 $ 489 Gross amounts offset 1,185 489 Net Amounts Presented in the Consolidated Balance Sheets — — Gross amounts not offset: Financial instruments — — Cash collateral 500 500 Net Amounts $ 500 $ 500

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement	( 7 ) Fair Value Measurement Fair value measurement and disclosure guidance defines fair value as the price that would be received to sell the asset or transfer the liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. This guidance provides additional information on determining when the volume and level of activity for the asset or liability has significantly decreased. Information on identifying circumstances when a transaction may not be considered orderly is also included within the guidance. Fair value measurement and disclosure guidance provides a list of factors that a reporting entity should evaluate to determine whether there has been a significant decrease in the volume and level of activity for the asset or liability in relation to normal market activity for the asset or liability. When the reporting entity concludes there has been a significant decrease in the volume and level of activity for the asset or liability, further analysis of the information from that market is needed and significant adjustments to the related prices may be necessary to estimate fair value in accordance with the fair value measurement and disclosure guidance. This guidance clarifies that when there has been a significant decrease in the volume and level of activity for the asset or liability, some transactions may not be orderly. In those situations, the entity must evaluate the weight of the evidence to determine whether the transaction is orderly. The guidance provides a list of circumstances that may indicate that a transaction is not orderly. A transaction price that is not associated with an orderly transaction is given little, if any, weight when estimating fair value. Inputs to valuation techniques refer to the assumptions that market participants would use in measuring the fair value of an asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own belief about the assumptions market participants would use in pricing the asset or liability based upon the best information available in the circumstances. Fair value measurement and disclosure guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. An asset’s or liability’s placement in the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement or disclosure. The fair value hierarchy is as follows: Level 1 Inputs - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; Level 2 Inputs - Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability; Level 3 Inputs - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. There were no transfers of assets between fair value Level 1 and Level 2 during the three months ended March 31, 2021 and 2020. The following tables illustrate the assets measured at fair value on a recurring basis segregated by hierarchy fair value levels. Fair value measurements at March 31, 2021 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: March 31, 2021 (Level 1) (Level 2) (Level 3) Available-for-sale securities: Mortgage-backed U.S. government agencies $ 2 $ — $ 2 $ — Corporate debt securities 3,248 — 3,248 — Other assets: Equity securities 508 508 — — Total $ 3,758 $ 508 $ 3,250 $ — Fair value measurements at December 31, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2020 (Level 1) (Level 2) (Level 3) Available-for-sale securities: U.S. government agencies $ 2 $ — $ 2 $ — Corporate debt securities 5,746 — 5,746 — Other assets: Equity securities 515 515 — — Interest rate swap agreements 489 — 489 — Total $ 6,752 $ 515 $ 6,237 $ — Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following tables illustrate the assets measured at fair value on a nonrecurring basis segregated by hierarchy fair value levels. Fair value measurements at March 31, 2021 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: March 31, 2021 (Level 1) (Level 2) (Level 3) Impaired Loans $ 897 $ — $ — $ 897 Foreclosed Assets Held for Sale 77 — — 77 Fair value measurements at December 31, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2020 (Level 1) (Level 2) (Level 3) Impaired Loans $ 800 $ — $ — $ 800 Foreclosed Assets Held for Sale 77 — — 77 The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis and for which Mid Penn has utilized Level 3 inputs to determine the fair value. (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements March 31, 2021 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 897 Appraisal of collateral (a), (b) Appraisal adjustments (b) 24% - 100% 39% Foreclosed Assets Held for Sale 77 Appraisal of collateral (a), (b) Appraisal adjustments (b) 27% - 27% 27% (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements December 31, 2020 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 800 Appraisal of collateral (a), (b) Appraisal adjustments (b) 25% - 100% 40% Foreclosed Assets Held for Sale 77 Appraisal of collateral (a), (b) Appraisal adjustments (b) 27% - 27% 27% (a) Fair value is generally determined through independent appraisals of the underlying collateral, which generally includes various Level 3 inputs which are not observable. (b) Appraisals may be adjusted downward by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal. Higher downward adjustments are caused by negative changes to the collateral or conditions in the real estate market, actual offers or sales contracts received, or age of the appraisal. There were no changes in unrealized gains and losses included in other comprehensive income during the three months ended March 31, 2021 or 2020 related to Level 3 recurring fair value measurements as Mid Penn has no assets measured at fair value on a Level 3 recurring basis. Mid Penn uses the following methodologies and assumptions to estimate the fair value of certain assets and liabilities. Securities: The fair value of equity securities and debt securities classified as available for sale is determined by obtaining quoted market prices on nationally recognized securities exchanges (Level 1), or matrix pricing (Level 2), which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted market prices for the specific securities, but rather, relying on the securities’ relationship to other benchmark quoted prices. Interest Rate Swap Agreements: Interest rate swap agreements are measured by alternative pricing sources with reasonable levels of price transparency in markets that are not active. Based on the complex nature of interest rate swap agreements, the markets these instruments trade in are not as efficient and are less liquid than that of the more mature Level 1 markets. These markets do however have comparable, observable inputs in which an alternative pricing source values these assets in order to arrive at a fair market value. These characteristics classify interest rate swap agreements as Level 2. Impaired Loans (included in “Net Loans and Leases” in the following tables): All performing troubled debt restructured loans and loans classified as nonaccrual are deemed to be impaired, and all of these loans are considered collateral dependent; therefore, all of Mid Penn’s impaired loans, whether reporting a specific allowance allocation or not, are considered collateral dependent. It is Mid Penn’s policy to obtain updated third-party valuations on all impaired loans collateralized by real estate within 30 days of the credit being classified as substandard nonaccrual. Prior to receipt of the updated real estate valuation, Mid Penn will use existing real estate valuations to determine any potential allowance for loan loss issues, and will update the allowance impact calculation upon receipt of the updated real estate valuation. In some instances, Mid Penn is not holding real estate as collateral and is relying on business assets (personal property) for repayment. In these circumstances a collateral inspection is performed by Mid Penn personnel to determine an estimated value. The value is based on net book value, as provided by the financial statements, and discounted accordingly based on determinations made by management. Occasionally, Mid Penn will employ an outside service to provide a fair estimate of value based on auction sales or private sales. Management reviews the estimates of these third parties and discounts them accordingly based on management’s judgment, if deemed necessary. Mid Penn considers the estimates used in its impairment analysis to be Level 3 inputs. Mid Penn actively monitors the values of collateral on impaired loans. This monitoring may require the modification of collateral values, either in a positive or negative way, due to the passage of time or some other change in one or more valuation inputs. Collateral values for impaired loans will be reassessed by management at least every 12 months for possible revaluation by an independent third party. Foreclosed Assets Held for Sale: Certain assets included in foreclosed assets held for sale are carried at fair value and accordingly is presented as measured on a non-recurring basis. Values are estimated using Level 3 inputs, based on appraisals that consider the sales prices of property in the proximate vicinity. The following table summarizes the carrying value and fair value of financial instruments at March 31, 2021 and December 31, 2020. (Dollars in thousands) March 31, 2021 December 31, 2020 Carrying Fair Carrying Fair Value Value Value Value Financial assets: Cash and cash equivalents $ 427,371 $ 427,371 $ 303,724 $ 303,724 Available-for-sale investment securities 3,250 3,250 5,748 5,748 Held-to-maturity investment securities 130,560 133,519 128,292 132,794 Equity securities 508 508 515 515 Loans held for sale 25,842 26,434 25,506 26,262 Net loans and leases 2,632,645 2,716,155 2,370,659 2,444,105 Restricted investment in bank stocks 6,860 6,860 7,594 7,594 Accrued interest receivable 11,855 11,855 3,619 3,619 Interest rate swap agreements — — 489 489 Financial liabilities: Deposits $ 2,666,827 2,670,017 $ 2,474,580 $ 2,496,799 Short-term borrowings 307,753 307,753 125,617 125,617 Long-term debt (a) 71,584 65,776 71,648 70,498 Subordinated debt 44,586 46,784 44,580 43,098 Accrued interest payable 1,902 1,902 2,007 2,007 Interest rate swap agreements 1,185 1,185 — — (a) Long-term debt excludes finance lease obligations. The Bank’s outstanding and unfunded credit commitments and financial standby letters of credit were deemed to have no significant fair value as of March 31, 2021 and December 31, 2020. The following tables present the carrying amount, fair value, and placement in the fair value hierarchy of Mid Penn’s financial instruments as of March 31, 2021 and December 31, 2020. Carrying values approximate fair values for cash and cash equivalents, restricted investment in bank stocks, accrued interest receivable and payable, and short-term borrowings. Other than cash and cash equivalents, which are considered Level 1 Inputs and mortgage servicing rights, which are Level 3 Inputs, these instruments are Level 2 Inputs. These tables exclude financial instruments for which the carrying amount approximates fair value, not previously disclosed. Fair Value Measurements Quoted Prices in Active Markets Significant (Dollars in thousands) for Identical Assets Significant Other Unobservable Carrying or Liabilities Observable Inputs Inputs March 31, 2021 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 130,560 $ 133,519 $ — $ 133,519 $ — Loans held for sale 25,842 26,434 — 26,434 — Net loans and leases 2,632,645 2,716,155 — — 2,716,155 Financial instruments - liabilities Deposits $ 2,666,827 $ 2,670,017 $ — $ 2,670,017 $ — Long-term debt (a) 71,584 65,776 — 65,776 — Subordinated debt 44,586 46,784 — 46,784 — Fair Value Measurements Quoted Prices in Active Markets Significant (Dollars in thousands) for Identical Assets Significant Other Unobservable Carrying or Liabilities Observable Inputs Inputs December 31, 2020 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 128,292 $ 132,794 $ — $ 132,794 $ — Loans held for sale 25,506 26,262 — 26,262 — Net loans and leases 2,370,659 2,444,105 — — 2,444,105 Financial instruments - liabilities Deposits $ 2,474,580 $ 2,496,799 $ — $ 2,496,799 $ — Long-term debt (a) 71,648 70,498 — 70,498 — Subordinated debt 44,580 43,098 — 43,098 — (a) Long-term debt excludes finance lease obligations.

Guarantees, Commitments, and Co

Guarantees, Commitments, and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Guarantees, Commitments, and Contingencies	(8) Guarantees, Commitments, and Contingencies Guarantees In the normal course of business, Mid Penn makes various commitments and incurs certain contingent liabilities which are not reflected in the accompanying consolidated financial statements. The commitments include various guarantees and commitments to extend credit. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Mid Penn evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of credit, is based on management’s credit evaluation of the customer. Standby letters of credit and financial guarantees written are conditional commitments to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. Mid Penn had $43,997,000 and $39,468,000 of standby letters of credit outstanding as of March 31, 2021 and December 31, 2020, respectively. Mid Penn does not anticipate any losses because of these transactions. The amount of the liability as of March 31, 2021 and December 31, 2020 for payment under standby letters of credit issued was not considered material. Contingencies As of March 31, 2021, Mid Penn had received a total of $36,765,000 of nonrefundable loan processing fees related to the loans disbursed as a result of the SBA’s Paycheck Protection Program. These PPP loan processing fees, and any offsetting loan origination costs, were deferred in accordance with FASB ASC 310-20, Receivables—Nonrefundable Fees and Other Costs, and have been, and will continue to be, amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of the respective loans. The processing fees received from the SBA for administering the application for, and disbursing of, the PPP loans may be subject to clawback (or if the SBA has not yet paid the fee, the fee may not be paid), after full disbursement of a PPP loan if (i) the PPP loan is cancelled or voluntarily terminated and repaid after disbursement but before the borrower certification safe harbor date, (ii) the PPP loan is cancelled, terminated, or repaid after disbursement (and after the borrower certification safe harbor date) because the SBA conducted a loan review and determined that the borrower was ineligible for a PPP loan, or (iii) the lender has not fulfilled its obligations under the PPP regulations. As of March 31, 2021, Mid Penn is not aware of any PPP 2020 or 2021 loans outstanding for which fees have been received from the SBA, that have been cancelled, terminated, or repaid due to a borrower being determined to be ineligible for a PPP loan. Litigation Mid Penn is subject to lawsuits and claims arising out of its normal conduct of business. In the opinion of management, after consultation with legal counsel, the ultimate disposition of these matters is not expected to have a material adverse effect on the consolidated financial condition of Mid Penn.

Debt

Debt	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Debt	( 9 ) Debt Short-term FHLB and Correspondent Bank Borrowings Short-term borrowings generally consist of federal funds purchased and advances from the FHLB with an original maturity of less than a year. Federal funds purchased from correspondent banks mature in one business day and reprice daily based on the Federal Funds rate. Advances from the FHLB are collateralized by Mid Penn’s investment in the common stock of the FHLB and by a blanket lien on selected loan receivables comprised principally of real estate secured loans within the Bank’s portfolio totaling $1,302,960,000 at March 31, 2021. The Bank had short-term borrowing capacity from the FHLB as of March 31, 2021 up to the Bank’s unused borrowing capacity of $571,837,000 (equal to $908,918,000 of maximum borrowing capacity, less letter of credit securing public funds deposits, and other FHLB advances and obligations outstanding) upon satisfaction of any stock purchase requirements of the FHLB. No draws were outstanding on short-term FHLB or correspondent bank borrowings as of March 31, 2021 and December 31, 2020. The Bank also has unused overnight lines of credit with other correspondent banks amounting to $35,000,000 at March 31, 2021. No draws have been made on these lines of credit and accordingly the balance was zero on both March 31, 2021 and December 31, 2020. Short-term PPPLF Borrowings The entire balance of short-term borrowings of $307,753,000 and $125,617,000 at March 31, 2021 and December 31, 2020, respectively, consisted of funding obtained from the Federal Reserve through the Paycheck Protection Program Liquidity Facility (“PPPLF”). The PPPLF allows banks to pledge PPP loans as collateral to borrow funds for up to a term of five years (to match the term of the respective PPP loans) at an interest rate of 0.35%. PPPLF draws must be repaid to the Federal Reserve immediately after the specific PPP loans collateralizing the related draws are repaid to the Bank. Long-term Debt As of March 31, 2021, and December 31, 2020, the Bank had long-term debt outstanding in the amount of $75,030,000 and $75,115,000, respectively, consisting primarily of FHLB fixed rate instruments, as well as one finance lease obligation. As a member of the FHLB, the Bank can access a number of credit products which are utilized to provide liquidity. The FHLB fixed rate instruments obtained by the Bank are secured under the terms of a blanket collateral agreement with the FHLB consisting of FHLB stock and qualifying Mid Penn loan receivables, principally real estate secured loans. Mid Penn also obtains letters of credit from the FHLB to secure certain public fund deposits of municipality and school district customers who agree to use of the FHLB letters of credit as a legally allowable alternative to investment pledging. These FHLB letter of credit commitments totaled $263,800,000 as of March 31, 2021 and $288,950,000 as of December 31, 2020 The following table presents a summary of long-term debt as of March 31, 2021 and December 31, 2020. (Dollars in thousands) March 31, 2021 December 31, 2020 FHLB fixed rate instruments: Due April 2022, 0.86343% $ 70,000 $ 70,000 Due August 2026, 4.80% 1,544 1,606 Due February 2027, 6.71% 40 42 Total FHLB fixed rate instruments 71,584 71,648 Lease obligations included in long-term debt 3,446 3,467 Total long-term debt $ 75,030 $ 75,115 Mid Penn did not prepay any long-term debt instruments during the three months ended March 31, 2021. As part of asset/liability and interest rate risk management strategies, during the first quarter of 2020, Mid Penn prepaid $9,500,000 of FHLB fixed rate instruments originally due at various times in 2020, and recognized prepayment penalties of $63,000 that are included in other expenses for the three months ended March 31, 2020 on the Consolidated Statement of Income.

Subordinated Debt

Subordinated Debt	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Subordinated Debt	( 10 ) Subordinated Debt Subordinated Debt Issued December 2020 On December 22, 2020, Mid Penn Bancorp, Inc. entered into agreements for and sold, at 100% of their principal amount, an aggregate of $12,150,000 of its Subordinated Notes due December 2030 (the “December 2020 Notes”) on a private placement basis to accredited investors. The December 2020 Notes are treated as Tier 2 capital for regulatory capital purposes. The December 2020 Notes bear interest at a rate of 4.5% per year for the first five years and then float at the Wall Street Journal’s Prime Rate, provided that the interest rate applicable to the outstanding principal balance during the period the December 2020 Notes are floating will at no time be less than 4.5%. Interest is payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year, beginning on March 31, 2021. The December 2020 Notes will mature on December 31, 2030 and are redeemable, in whole or in part, without premium or penalty, on any interest payment date on or after December 31, 2025 and prior to December 31, 2030, subject to any required regulatory approvals. Additionally, if (i) all or any portion of the December 2020 Notes cease to be deemed Tier 2 Capital, (ii) interest on the December 2020 Notes fails to be deductible for United States federal income tax purposes or (iii) Mid Penn will be considered an “investment company,” Mid Penn may redeem the December 2020 Notes, in whole but not in part, by giving 10 days’ notice to the holders of the December 2020 Notes. In the event of a redemption described in the previous sentence, Mid Penn will redeem the December 2020 Notes at 100% of the principal amount of the December 2020 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption. Holders of the December 2020 Notes may not accelerate the maturity of the December 2020 Notes, except upon the bankruptcy, insolvency, liquidation, receivership or similar event of Mid Penn or Mid Penn Bank, its principal banking subsidiary. Related parties held $750,000 of the December 2020 Notes as of March 31, 2021 and December 31, 2020. Subordinated Debt Issued March 2020 On March 20, 2020, Mid Penn Bancorp, Inc. entered into agreements with accredited investors who purchased $15,000,000 aggregate principal amount of Mid Penn Subordinated Notes due 2030 (the “March 2020 Notes”). The March 2020 Notes are intended to be treated as Tier 2 capital for regulatory capital purposes. The March 2020 Notes bear interest at a rate of 4.0% per year for the first five years and then float at the Wall Street Journal’s Prime Rate, provided that the interest rate applicable to the outstanding principal balance during the period the March 2020 Notes are floating will at no time be less than 4.25%. Interest is payable semi-annually in arrears on June 30 and December 30 of each year, beginning on June 30, 2020, for the first five years after issuance and will be payable quarterly in arrears thereafter on March 30, June 30, September 30 and December 30. The March 2020 Notes will mature on March 30, 2030 and are redeemable in whole or in part, without premium or penalty, at any time on or after March 30, 2025 and prior to March 30, 2030. Additionally, if all or any portion of the March 2020 Notes cease to be deemed Tier 2 Capital, Mid Penn may redeem, on any interest payment date, all or part of the 2020 Notes. In the event of a redemption described in the previous sentence, Mid Penn will redeem the March 2020 Notes at 100% of the principal amount of the March 2020 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption. Holders of the March 2020 Notes may not accelerate the maturity of the March 2020 Notes, except upon the bankruptcy, insolvency, liquidation, receivership or similar event of Mid Penn or Mid Penn Bank, its principal banking subsidiary. Related parties held $1,700,000 of the March 2020 Notes as of March 31, 2021 and December 31, 2020. Subordinated Debt Issued December 2017 On December 19, 2017, Mid Penn Bancorp, Inc. entered into agreements with investors to purchase $10,000,000 aggregate principal amount of its Subordinated Notes due 2028 (the “2017 Notes”). The 2017 Notes are intended to be treated as Tier 2 capital for regulatory capital purposes. The offering closed in December 2017. The 2017 Notes bear interest at a rate of 5.25% per year for the first five years and then float at the Wall Street Journal’s Prime Rate plus 0.50%, provided that the interest rate applicable to the outstanding principal balance will at no time be less than 5.0%. Interest is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2018, for the first five years after issuance and will be payable quarterly in arrears thereafter on January 15, April 15, July 15, and October 15. The 2017 Notes will mature on January 1, 2028 and are redeemable in whole or in part, without premium or penalty, at any time on or after December 21, 2022, and prior to January 1, 2028. Additionally, Mid Penn may redeem the 2017 Notes in whole at any time, or in part from time to time, upon at least 30 days’ notice if: (i) a change or prospective change in law occurs that could prevent Mid Penn from deducting interest payable on the 2017 Notes for U.S. federal income tax purposes; (ii) an event occurs that precludes the 2017 Notes from being recognized as Tier 2 capital for regulatory capital purposes; or (iii) Mid Penn becomes required to register as an investment company under the Investment Company Act of 1940, as amended. In the event of a redemption described in the previous sentence, Mid Penn will redeem the 2017 Notes at 100% of the principal amount of the 2017 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption. Holders of the 2017 Notes may not accelerate the maturity of the 2017 Notes, except upon the bankruptcy, insolvency, liquidation, receivership or similar event of Mid Penn or Mid Penn Bank, its principal banking subsidiary. Related parties held $1,450,000 of the 2017 Notes as of March 31, 2021 and December 31, 2020. Subordinated Debt Issued December 2015 On December 9, 2015, Mid Penn Bancorp, Inc. sold $7,500,000 aggregate principal amount of Subordinated Debt (the “2015 Notes”) due 2025. Given that the 2015 Notes are in the sixth year since issuance, eighty-percent of the principal balance of the notes is treated as Tier 2 capital for regulatory capital purposes as of March 31, 2021. The 2015 Holders of the 2015 Notes may not accelerate the maturity of the 2015 Notes, except upon Mid Penn’s or Mid Penn Bank’s bankruptcy, insolvency, liquidation, receivership or similar event. Related parties held $1,930,000 of the 2015 Notes as of March 31, 2021 and December 31, 2020. ASC Subtopic 835-30, Simplifying the Presentation of Debt Issuance Costs Subordinated Debt Assumed July 2018 with the First Priority Acquisition On July 31, 2018, Mid Penn completed its acquisition of First Priority and assumed $9,500,000 of Subordinated Notes (the “First Priority Notes”). On December 18, 2020, Mid Penn redeemed the full $9,500,000 of the First Priority Notes promptly following the expiration of the Notes’ noncallable period and upon receipt of the required regulatory approval. Mid Penn recognized redemption pricing fees of $143,000 which were fully recognized in the fourth quarter of 2020.

Defined Benefit Plans

Defined Benefit Plans	3 Months Ended
	Mar. 31, 2021
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]
Defined Benefit Plans	(11) Defined Benefit Plans Mid Penn has an unfunded noncontributory defined benefit retirement plan for directors. The plan provides defined benefits based on years of service. Mid Penn also sponsors a defined benefit healthcare plan that provides post-retirement medical benefits and life insurance to qualifying full-time employees. These healthcare and life insurance plans are noncontributory and each plan uses a December 31 measurement date. As a result of the acquisition of Scottdale on January 8, 2018 , Mid Penn assumed a noncontributory defined benefit pension plan covering certain former employees of Scottdale. Mid Penn is expected to contribute $ to the defined benefit pension plan during 202 1 . A December 31 measurement date for the plan is used . The components of net periodic benefit costs from these defined benefit plans are as follows: Three Months Ended March 31, (Dollars in thousands) Pension Benefits Other Benefits 2021 2020 2021 2020 Service cost $ 33 $ 20 $ 1 $ — Interest cost 40 45 2 — Expected return on plan assets (57 ) (68 ) — — Accretion of prior service cost — — (5 ) (5 ) Settlement gain (49 ) — — — Net periodic benefit income $ (33 ) $ (3 ) $ (2 ) $ (5 ) Service costs are reported as a component of salaries and employee benefits on the Consolidated Statements of Income, while interest costs, expected return on plan assets and amortization (accretion) of prior service cost are reported as a component of other income.

Common Stock

Common Stock	3 Months Ended
	Mar. 31, 2021
Common Stock Number Of Shares Par Value And Other Disclosures [Abstract]
Common Stock	(1 2 ) Common Stock Treasury Stock Repurchase Program During 2020, Mid Penn adopted a treasury stock repurchase program authorizing the repurchase of up to $15,000,000 of Mid Penn’s outstanding common stock, which represents approximately 6.6% of the issued shares based on Mid Penn’s closing stock price and shares issued as of March 31, 2021. Under the treasury stock purchase program, Mid Penn may conduct repurchases of its common stock through open market transactions (which may be by means of a trading plan adopted under SEC Rule 10b5-1) or in privately negotiated transactions. Repurchases under the program are made at the discretion of management and are subject to market conditions and other factors. There is no guarantee as to the exact number of shares that Mid Penn may repurchase. The repurchase plan became effective March 19, 2020 and remains available as the buyback program was extended through March 19, 2022 by Mid Penn’s Board of Directors on April 28, 2021. Please see Note 15 – Subsequent Events, The repurchase plan may be modified, suspended or terminated at any time, in Mid Penn’s discretion, based upon a number of factors, including liquidity, market conditions, the availability of alternative investment opportunities and other factors Mid Penn deems appropriate. The repurchase program does not obligate Mid Penn to repurchase any shares. As of March 31, 2021, Mid Penn had repurchased 98,452 shares of common stock at an average price of $19.53 per share under the treasury stock repurchase program. As of December 31, 2020, Mid Penn had repurchased 92,652 shares of common stock at an average price of $19.37 per share under the treasury stock repurchase program. No shares of common stock were repurchased during the three months ended March 31, 2020. Underwritten Public Offering On April 29, 2021, Mid Penn issued a press release on a Form 8-K announcing the commencement of an underwritten public offering of $65,000,000 of the Corporation’s common stock (the “Offering”) through Piper Sandler & Co., as representative of the underwriters (the “Underwriters”). Mid Penn also granted the Underwriters a 30-day option to purchase up to an additional 15 percent of the offered amount of common stock, equal to 390,000 shares, from the Corporation. On May 4, 2021, Mid Penn announced on a Form 8-K that it had completed its underwritten public offering of 2,990,000 shares of common stock at a price of $25.00 per share, before underwriting discounts, including 390,000 additional shares of common stock upon the exercise in full by the underwriters of their option to purchase additional shares. Please see Note 15 – Subsequent Events, for more information. Dividend Reinvestment Plan Under Mid Penn’s amended and restated dividend reinvestment plan (“DRIP”), 330,750 shares of Mid Penn’s authorized but unissued common stock are reserved for issuance. The DRIP also allows for voluntary cash payments, within specified limits, to be used for the purchase of additional shares. Restricted Stock Plan Under Mid Penn’s 2014 Restricted Stock Plan, which was amended in 2020, Mid Penn may grant awards not exceeding, in the aggregate, 200,000 shares of common stock. The Plan was established for employees and directors of Mid Penn and the Bank, selected by the Compensation Committee of the Board of Directors, to align the interest of plan participants with those of Mid Penn’s shareholders. The plan provides those persons who have a responsibility for its growth with additional incentives by allowing them to acquire an ownership interest in Mid Penn and thereby encouraging them to contribute to the success of the company. As of March 31, 2021, a total of 85,914 restricted shares were granted under the Plan, of which 2,446 shares were forfeited and available for reissuance, 42,041 shares were vested, and the remaining 41,427 shares were unvested. No shares were forfeited during the three months ended March 31, 2021, while one hundred shares were forfeited due to a voluntary termination of an employee during the same period in 2020. The Plan shares granted and vested resulted in $132,000 in share-based compensation expense for the three months ended March 31, 2021, while $96,000 of share-based compensation expense was recorded for the three months ended March 31, 2020. Share-based compensation expense relating to restricted stock is calculated using grant date fair value and is recognized on a straight-line basis over the vesting periods of the awards. Restricted shares granted to employees vest in equal amounts on the anniversary of the grant date over the vesting period and the expense is a component of salaries and benefits expense on the Consolidated Statements of Income. The employee grant vesting period is determined by the terms of each respective grant, with vesting periods generally between one and four years. Restricted shares granted to directors have a twelve-month

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	(1 3 ) Recent Accounting Pronouncements Accounting Standards Adopted in 2021 ASU 2018-14: The FASB issued ASU 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans This ASU, issued as part of the FASB’s disclosure framework project to improve the effectiveness of disclosures in financial statements, amends the disclosure requirements related to defined benefit pension and other postretirement plans by removing and adding certain disclosures. The ASU was effective for public business entities for fiscal years ending after December 15, 2020 and Mid Penn adopted this standard effective January 1, 2021 on a prospective basis. As a result of this ASU, several disclosures were removed from Topic 715, including: (i) disclosures of the amounts in accumulated comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year, and (ii) the effects of a one-percentage point change in the assumed health care cost trend rates on the aggregate of service and interest cost components of net periodic postretirement health care benefit costs. However, some additional disclosures will be required as a result of this ASU, including the requirement to disclose an explanation for significant gains and losses related to changes in the benefit obligation for the period. Mid Penn discloses condensed information related to its defined benefit plans in interim periods, therefore, the prospective adoption of this ASU will result in Accounting Standards Adopted in 2020 ASU 2018-15: The FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract This ASU requires an entity in a cloud computing arrangement (i.e., hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. Capitalized implementation costs should be presented in the same line item on the balance sheet as amounts prepaid for the hosted service, if any (generally as an “other asset”). The capitalized costs will be amortized over the term of the hosting arrangement, with the amortization expense being presented in the same income statement line item as the fees paid for the hosted service. ASU 2018-15 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Mid Penn adopted ASU 2018-15 effective January 1, 2020 on a prospective basis. ASU 2018-15 did not have a material impact on the results of operations. ASU 2018-13: The FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement This ASU, issued as part of the FASB’s disclosure framework project to improve the effectiveness of disclosures in financial statements, amends the disclosure requirements related to recurring and nonrecurring fair value measurements by removing, modifying, and adding certain disclosures. As a result of this ASU, several disclosures were removed from Topic 820, including: (i) disclosure of the valuation process for Level 3 fair value measurements, and (ii) amounts of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy. However, some additional disclosures are required as a result of this ASU, including the requirement to disclose the changes in unrealized gains and losses included in other comprehensive income for the period related to Level 3 recurring fair value measurements, as well as the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Mid Penn adopted ASU 2018-13 effective January 1, 2020 on a prospective basis. The adoption of this ASU resulted in disclosure changes only and did not impact Mid Penn’s overall financial condition. Accounting Standards Pending Adoption ASU 2016-13 : The FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as further amended . The ASU requires credit losses on most financial assets measured at amortized cost and certain other instruments to be measured using an expected credit loss model (referred to as the current expected credit loss (“CECL”) model). Under this model, entities will estimate credit losses over the entire contractual term of the instrument (considering estimated prepayments, but not expected extensions or modifications unless reasonable expectation of a troubled debt restructuring exists) from the date of initial recognition of that instrument. The ASU also replaces the current accounting model for purchased credit impaired loans and debt securities. The allowance for purchased financial assets with a more-than insignificant amount of credit deterioration since origination (“PCD assets”) should be determined in a similar manner to other financial assets measured on an amortized cost basis. However, upon initial recognition, the allowance is added to the purchase price (“gross up approach”) to determine the initial amortized cost basis. The subsequent accounting for PCD financial assets is the same expected loss model described above. Further, the ASU made certain targeted amendments to the existing impairment model for available-for-sale debt securities. For an AFS debt security for which there is neither the intent nor a more-likely-than-not requirement to sell, an entity will record credit losses as an allowance rather than a write-down of the amortized cost basis. Certain incremental disclosures are required. Subsequently, the FASB issued ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-10, ASU 2019-11, and ASU 2020-02 to clarify, improve, or defer the adoption of ASU 2016-13. In October 2019, the FASB issued ASU 2019-10 which deferred the implementation date of ASU 2016-13 for smaller reporting companies (SRCs) until January 1, 2023. The effective date for larger SEC filers would remain unchanged at January 1, 2020. Mid Penn qualifies as an SRC as of the most recent measurement date of September 30, 2019; therefore, Mid Penn has chosen to delay the adoption of ASU 2016-13. Mid Penn is currently evaluating the details of this ASU and the impact the guidance will have on Mid Penn’s consolidated financial statements. Mid Penn expects that it is possible that the ASU may result in an increase in the allowance for credit losses resulting from the change to expected losses for the estimated life of the financial asset, including an allowance for debt securities. The amount of the change in the allowance for credit losses, if any, resulting from the new guidance will be impacted by the portfolio composition and asset quality at the adoption date, as well as economic conditions and forecasts at the time of adoption. Mid Penn will continue to collect the required data elements needed implement the CECL model in advance of the January 1, 2023 adoption date.

COVID-19 Pandemic Implications

COVID-19 Pandemic Implications	3 Months Ended
	Mar. 31, 2021
Risks And Uncertainties [Abstract]
COVID-19 Pandemic Implications	(14) COVID-19 Pandemic Implications On January 30, 2020, the World Health Organization (“WHO”) announced a global health emergency due the Novel Coronavirus (“COVID-19”), and on March 11, 2020, the WHO classified COVID-19 as a pandemic based on the rapid increase in exposure globally. After closing branch lobbies to curtail the spread of the virus, beginning March 17, 2020, Mid Penn has since reopened its branches effective April 19, 2021 given the extensive measures taken to ensure the safety of the Bank’s customers and employees. We are continuously cleaning Bank facilities during business hours with disinfecting wipes to sanitize all facets of our common areas, including door handles, work stations, ATM’s and service counters. We have mandated that all employees who handle cash use latex gloves when doing so, and we are requiring all employees to use hand sanitizer after each transaction and wash their hands with soap and hot water several times every hour. Additionally, employees having face-to-face interaction with customers are required to wear a mask. Importantly, we maintain appropriate social distancing standards when individuals are required by their job duties to be in the same location. Mid Penn has been a significant participating lender under the Paycheck Protection Program. The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term. The SBA also provided a processing fee per loan to financial institutions who participated in the PPP, with the amount of such fee generally ranging from 1 percent to 5 percent as pre-determined by the SBA dependent upon the size of each respective credit. In addition to the processing fees, Mid Penn recorded related loan origination costs. As of March 31, 2021, Mid Penn had received $36,765,000 of nonrefundable loan processing fees related to the loans disbursed as a result of Mid Penn’s participation in the PPP initiative, consisting of (i) $20,883,000 of loan processing fees received related to PPP loans funded during the year ended December 31, 2020, and (ii) $15,882,000 of loan processing fees received related to PPP loans funded during the three months ended March 31, 2021. The balance of these fees that have not yet been realized as income, and the related loan origination costs are deferred in accordance with ASC 310-20, Receivables—Nonrefundable Fees and Other Costs The CARES Act, along with a joint agency statement issued by banking agencies, provides that short-term modifications made in response to COVID-19 do not need to be accounted for as troubled debt restructurings. Depending upon the specific needs and circumstances affecting each borrower, the majority of these modifications ranged from deferrals of both principal and interest payments with some borrowers reverting to interest-only payments. The majority of the deferrals were granted for a period of three months, but some as long as six months, depending upon management’s specific evaluation of each borrower’s circumstances. Interest has and will continue to accrue on loans modified under the CARES Act during the deferral period. As of March 31, 2021, the principal balance of loans remaining in a CARES Act qualifying deferment status totaled $5,131,000, or less than 1 percent of the total loan portfolio, a reduction compared to December 31, 2020, when $11,681,000 of loans, also representing less than 1 percent of the total loan portfolio, were in this deferment status. Most borrowers granted a CARES Act deferral have returned to regular payment status. Mid Penn remains in communication with each of the borrowers still in deferral status to assess the ongoing credit standing of the borrowers, and may make further adjustments to a borrower’s relationship at some future time if warranted for the specific situation. The full impact of the coronavirus continues to evolve as of the date of this report. As such, it is uncertain as to the full magnitude that the pandemic will have on the Corporation’s financial condition, liquidity, capital position, and future results of operations. In addition, the adverse economic effects of the coronavirus may lead to an increase in credit risk on the Corporation’s commercial and residential loan portfolios. Also, the Corporation is also monitoring the fluctuations in the markets as it pertains to interest rates and the fair value of our investments, as well as the impact of the pandemic of underlying bond issuers and the potential for OTTI. Management is actively monitoring the global situation on its financial condition, liquidity, capital position, operations, industry, and workforce. Given the daily evolution of the coronavirus and the global responses to curb its spread, the Corporation is not able to estimate the effects of the coronavirus on its results of operations, financial condition, capital position, or liquidity for fiscal year 2021.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	(15) Subsequent Events Underwritten Public Offering On April 29, 2021, Mid Penn issued a press release on a Form 8-K announcing the commencement of an underwritten public offering of $65,000,000 of the Corporation’s common stock (the “Offering”), priced at 2,600,000 shares of common stock at $25.00 per share, through Piper Sandler & Co., as representative of the underwriters (the “Underwriters”). Mid Penn also granted the Underwriters a 30-day option to purchase up to an additional 15 percent of the offered amount of common stock, equal to 390,000 shares, from the Corporation. On May 4, 2021, Mid Penn announced on a Form 8-K that it had completed its underwritten public offering of 2,990,000 shares of common stock at a price of $25.00 per share, before underwriting discounts, including 390,000 additional shares of common stock upon the exercise in full by the underwriters of their option to purchase additional shares. The aggregate gross proceeds of the offering were $74.75 million. The net proceeds of the offering after deducting the underwriting discount and other estimated offering expenses are expected to be approximately $70.2 million. Mid Penn intends to use the net proceeds of the offering to increase its capital structure, to fund future organic growth and for working capital and other general corporate purposes. The Corporation may also use a portion of the net proceeds for future acquisitions, although the Corporation has no present commitments or agreements to do so. Extension of Treasury Stock Repurchase Program On April 28, 2021, the Board of Directors of the Corporation approved the renewal of its treasury stock repurchase program, which was announced on March 19, 2020. The repurchase plan, which authorized the repurchase of up to $15,000,000 of which $13,077,000 remains available, of Mid Penn’s common stock in the open market or privately negotiated transactions, has been extended through March 19, 2022. The repurchase plan may be modified, suspended or terminated at any time, in the Corporation’s discretion, based upon a number of factors, including liquidity, market conditions, the availability of alternative investment opportunities and other factors the Corporation deems appropriate. The repurchase program does not obligate the Corporation to repurchase any shares.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Investment Securities	Investment Securities Securities to be held for indefinite periods, but not intended to be held to maturity, are classified as available for sale and carried at fair value. Securities held for indefinite periods include securities that management intends to use as part of its asset and liability management strategy and pledging requirements, and that may be sold in response to liquidity needs, changes in interest rates, resultant prepayment risk, reductions in pledging levels, and other factors related to effective portfolio management. Securities to be held to maturity are carried at amortized cost. For available-for-sale debt securities, realized gains and losses on dispositions are based on the difference between net proceeds and the amortized cost of the securities sold, using the specific identification method. Unrealized gains and losses on debt securities are based on the difference between the amortized cost and fair value of each security as of the respective reporting date. Unrealized gains and losses are credited or charged to other comprehensive income on an after-tax basis, whereas realized gains and losses flow through Mid Penn’s consolidated statement of income for the respective period. ASC Topic 320, Investments – Debt and Equity Securities In instances when a determination is made that an other-than-temporary impairment of a debt security exists but the Corporation does not intend to sell the debt security and it is not more likely than not that it will be required to sell the debt security prior to its anticipated recovery, this guidance changes the presentation and amount of the other-than-temporary impairment recognized in the income statement. The other-than-temporary impairment is separated into (a) the amount of the total other-than-temporary impairment related to a decrease in cash flows expected to be collected from the debt security (the credit loss), and (b) the amount of the total other-than-temporary impairment related to all other factors. The amount of the total other-than-temporary impairment related to the credit loss is recognized in earnings. The amount of the total other-than-temporary impairment related to all other factors is recognized in other comprehensive income.
Equity Securities	Equity Securities In accordance with ASC Topic 825 , Financial Instruments
Loans	Loans Loans receivable that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees or costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans, generally being amortized over the contractual life of the loan. Premiums and discounts on purchased loans are amortized as adjustments to interest income using the effective yield method. The loan portfolio is segmented into commercial and consumer loans. Commercial loans consist of the following classes: commercial and industrial, commercial real estate, commercial real estate-construction and lease financing. Consumer loans consist of the following classes: residential mortgage loans, home equity loans and other consumer loans. For all classes of loans, the accrual of interest generally is discontinued when the contractual payment of principal or interest has become 90 days or more past due, or management has serious doubts about further collectability of principal or interest even though the loan is currently performing. A loan past due 90 days or more may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan is placed on nonaccrual status, unpaid interest is credited to income. Interest received on nonaccrual loans, including impaired loans, is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Nonaccrual loans may be restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time (generally, at least nine consecutive months) and the ultimate collectability of the total contractual principal and interest is no longer in doubt. The past due status of all classes of loans receivable is determined based on contractual due dates for loan payments. Commercial and Industrial Loans Mid Penn originates commercial and industrial loans. Most of the Bank’s commercial and industrial loans have been extended to finance local and regional businesses and include short-term loans to finance machinery and equipment purchases, inventory, and accounts receivable. Commercial loans also involve the extension of revolving credit for a combination of equipment acquisitions and working capital in expanding companies. The maximum term for loans extended on machinery and equipment is based on the projected useful life of such machinery and equipment. Generally, the maximum term on non-mortgage lines of credit is one year. The loan-to-value ratio on such loans and lines of credit generally may not exceed 80 percent of the value of the collateral securing the loan. The Bank’s commercial business lending policy includes credit file documentation and analysis of the borrower’s character, capacity to repay the loan, the adequacy of the borrower’s capital and collateral, as well as an evaluation of conditions affecting the borrower. Analysis of the borrower’s past, present, and future cash flows is also an important aspect of the Bank’s current credit analysis. Nonetheless, such loans are believed to carry higher credit risk than other extensions of credit. Commercial and industrial loans typically are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. As a result, the availability of funds for the repayment of commercial business loans may be substantially dependent on the success of the business itself, which, in turn, is likely to be dependent upon the general economic environment. Mid Penn’s commercial and industrial loans are usually, but not always, secured by business assets and personal guarantees. However, the collateral securing the loans may depreciate over time, may be difficult to appraise, and may fluctuate in value based on the success of the business. Commercial Real Estate and Commercial Real Estate – Construction Loans Commercial real estate and commercial real estate construction loans generally present a higher level of risk than loans secured by one-to-four family residences. This greater risk is due to several factors, including the concentration of principal in a limited number of loans and borrowers, the effect of general economic conditions on income producing properties, and the increased difficulty of evaluating and monitoring these types of loans. In addition, the repayment of loans secured by commercial real estate is typically dependent upon the successful operation of the related real estate project. If the cash flow from the project is reduced, the borrower’s ability to repay the loan may be impaired. Residential Mortgage Loans Mid Penn offers a wide array of residential mortgage loans for both permanent structures and those under construction. The Bank’s residential mortgage originations are secured primarily by properties located in its primary market and surrounding areas. Residential mortgage loans have terms up to a maximum of 30 years and with loan-to-value ratios up to 100 percent of the lesser of the appraised value of the security property or the contract price. Private mortgage insurance is generally required in an amount sufficient to reduce the Bank’s exposure to at or below the 85 percent loan to value level. Residential mortgage loans generally do not include prepayment penalties. In underwriting residential mortgage loans, the Bank evaluates both the borrower’s ability to make monthly payments and the value of the property securing the loan. Most properties securing real estate loans made by Mid Penn are appraised by independent fee appraisers. The Bank generally requires borrowers to obtain title insurance and fire and property insurance (including flood insurance, if necessary) in an amount not less than the amount of the loan. Real estate loans originated by the Bank generally contain a “due on sale” clause allowing the Bank to declare the unpaid principal balance due and payable upon the sale of the security property. The Bank underwrites residential mortgage loans to the standards established by the secondary mortgage market, i.e., Fannie Mae, Ginnie Mae, Freddie Mac, Federal Home Loan Bank, or Pennsylvania Housing Finance Agency standards, with the intention of selling the majority of residential mortgages originated into the secondary market. In the event that the facts and circumstances surrounding a residential mortgage application do not meet the required underwriting conditions of the secondary mortgage market, the Bank will evaluate the failed conditions and evaluate the potential risk of holding the residential mortgage in the Bank’s portfolio rather than rejecting the loan request. In the event that the loan is funded and held in the Bank’s portfolio, the interest rate on the residential mortgage would be increased to compensate for the added portfolio risk. Consumer Loans, Including Home Equity Credits Mid Penn offers a variety of secured consumer loans, including home equity, automobile, and deposit secured loans. In addition, the Bank offers other secured and unsecured consumer loans. Most consumer loans are originated in Mid Penn’s primary market and surrounding areas. The largest component of Mid Penn’s consumer loan portfolio consists of fixed rate home equity loans and variable rate home equity lines of credit. Substantially all home equity loans and lines of credit are secured by junior lien mortgages on principal residences. The Bank will lend amounts, which, together with all prior liens, typically may be up to 85 percent of the appraised value of the property securing the loan. Home equity term loans may have maximum terms up to 20 years, while home equity lines of credit generally have maximum terms of five years. Consumer loan terms vary according to the type and value of collateral, length of contract and creditworthiness of the borrower. The underwriting standards employed by the Bank for consumer loans include an application, a determination of the applicant’s payment history on other debts, and an assessment of ability to meet existing obligations and payments on the proposed loan. Although creditworthiness of the applicant is a primary consideration, the underwriting process also includes a comparison of the value of the collateral, if any, in relation to the proposed loan amount. Consumer loans may entail greater credit risk than do residential mortgage loans, particularly in the case of consumer loans which are unsecured or are secured by rapidly depreciable assets, such as automobiles or recreational equipment. In such cases, any repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment of the outstanding loan balance. In addition, consumer loan collections are dependent on the borrower’s continuing financial stability, and thus are more likely to be affected by adverse personal circumstances. Furthermore, the application of various federal and state laws, including bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans. Junior liens inherently have more credit risk by virtue of the fact that another financial institution may have a higher security position in the case of foreclosure liquidation of collateral to extinguish the debt. Generally, foreclosure actions could become more prevalent if the real estate market weakens and property values deteriorate. Payroll Protection Program (“PPP”) Loans Included in total loans as of March 31, 2021 within the commercial and industrial loan portfolio classification are $590,035,000 of Paycheck Protection Program (“PPP”) loans, net of deferred fees, with this total being comprised of (i) $335,589,000 of PPP 2021 loans, net of deferred fees, originated during the first quarter of 2021; and (ii) $254,446,000 of PPP 2020 loans, net of deferred fees, originated during 2020 which, as of March 31, 2021, were still outstanding as the Small Business Administration (“SBA”) had not yet completed the loan forgiveness and repayment processing. Comparatively, as of December 31, 2020, Mid Penn had $388,313,000 of PPP 2020 loans outstanding, net of deferred fees. Mid Penn has been a significant participating lender under the PPP, which was originally created when the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was signed into law on March 27, 2020, and extended by the signing of the Consolidated Appropriations Act, 2021 into law on December 27, 2020. The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term. The SBA also provided a processing fee per loan to financial institutions who participated in the PPP, with the amount of such fee generally ranging from 1 percent to 5 percent as pre-determined by the SBA dependent upon the size of each respective credit. In addition to the processing fees, Mid Penn recorded related loan origination costs. As of March 31, 2021, Mid Penn had received $36,765,000 of nonrefundable loan processing fees related to the loans disbursed as a result of Mid Penn’s participation in the PPP initiative, consisting of (i) $20,883,000 of loan processing fees received related to PPP loans funded during the year ended December 31, 2020, and (ii) $15,882,000 of loan processing fees received related to PPP loans funded during the three months ended March 31, 2021. The balance of these fees that have not yet been realized as income, and the related loan origination costs are deferred in accordance with ASC 310-20, Receivables—Nonrefundable Fees and Other Costs
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses The allowance for credit losses (“allowance”) and the related provision reflect Mid Penn’s continued application of the incurred loss method for estimating credit losses as Mid Penn is not required to adopted the current expected credit loss (“CECL”) accounting standard until January 1, 2023. The allowance consists of (i) the allowance for loan and lease losses, and (ii) the reserve for unfunded lending commitments. The allowance for loan and lease losses represents management’s estimate of losses inherent in the loan portfolio as of the balance sheet date and is recorded as a reduction to loans. The reserve for unfunded lending commitments represents management’s estimate of losses inherent in its unfunded loan commitments and is recorded in other liabilities on the consolidated balance sheet. The reserve for unfunded lending commitments was $66,000 at March 31, 2021 and December 31, 2020. The allowance is increased by the provision for loan and lease losses, and decreased by charge-offs, net of recoveries. Loans deemed to be uncollectible are charged against the allowance, and subsequent recoveries, if any, are credited to the allowance. All, or part, of the principal balance of loans are charged off to the allowance as soon as it is determined that the repayment of all, or part, of the principal balance is highly unlikely. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, or earlier in the event of either bankruptcy or if there is an amount deemed uncollectible. Because all identified losses are immediately charged off, no portion of the allowance is restricted to any individual loan or groups of loans, and the entire allowance is available to absorb any and all loan losses. The allowance is maintained at a level considered by management to be adequate to provide for losses that can be reasonably anticipated. Management performs a monthly evaluation of the adequacy of the allowance. The allowance is based on Mid Penn’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions, and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are classified as impaired. For loans that are classified as impaired, an allowance is established when the discounted cash flows, collateral value, or observable market price of the impaired loan is lower than the carrying value of that loan. The general component covers pools of loans by loan class including commercial loans not considered impaired, as well as smaller balance homogeneous loans, such as residential real estate, home equity and other consumer loans. These pools of loans are evaluated for loss exposure based upon historical loss rates for each of these categories of loans, adjusted for qualitative factors. These qualitative risk factors include changes in economic conditions, fluctuations in loan quality measures, changes in collateral values, changes in the experience of the lending staff and loan review systems, changes in lending policies and procedures (including underwriting standards), changes in the mix and volume of loans originated, the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the existing loan portfolio, shifting industry or portfolio concentrations, and other relevant factors. Each factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. Adjustments to the factors are supported through documentation of changes in conditions in relevant analyses and a narrative accompanying the allowance for loan loss calculation. The unallocated component of the allowance for loan and lease losses covers several considerations that are not specifically measurable through either the specific and general components. For example, at times Mid Penn could face increasing credit risks and uncertainties, not yet reflected in recent historical losses or qualitative factor assessments, associated with unpredictable changes in economic growth or business conditions in our markets or for certain industries in which we have commercial loan borrowers, or unanticipated stresses to the values of real estate held as collateral, or unforeseeable effects on the portfolio from other influences, inducing the long-term impact of the pandemic. Any or all of these additional issues can adversely affect our borrowers’ ability to timely repay their loans. Mid Penn generally considers a commercial loan (consisting of commercial and industrial, commercial real estate, commercial real estate-construction, and lease financing loan classes) to be impaired when it becomes 90 days or more past due and not in the process of collection, or sooner when it is probable that Mid Penn will be unable to collect all contractual principal and interest due. This methodology assumes the borrower cannot or will not continue to make additional payments. At that time, the loan would generally be considered collateral dependent as the discounted cash flow method would generally indicate no operating income available for evaluating the collateral position; therefore, most impaired loans are deemed to be collateral dependent. In addition, Mid Penn’s rating system assumes any loans classified as nonaccrual, included in the substandard rating, to be impaired, and most of these loans are considered collateral dependent; therefore, most of Mid Penn’s impaired loans, whether reporting a specific allocation or not, are considered collateral dependent. Mid Penn evaluates loans for charge-off on a monthly basis. Policies that govern the recommendation for charge-off are unique to the type of loan being considered. Commercial loans classified as substandard nonaccrual, doubtful, having probable loss will first have a collateral evaluation completed in accordance with the guidance on impaired loans. Once the collateral evaluation has been completed, a specific allocation of allowance is made based upon the results of the evaluation. The remaining balance remains a nonperforming loan with the original terms and interest rate intact (not restructured). In the event the loan is unsecured, the loan would have been charged-off at the recognition of impairment. Commercial real estate loans determined to be impaired will also have an initial collateral evaluation completed in accordance with the guidance on impaired loans. An updated real estate valuation is ordered and the collateral evaluation is modified to reflect any variations in value. A specific allocation of allowance is made for any anticipated collateral shortfall. The remaining balance remains a nonperforming loan with the original terms and interest rate intact (not restructured). The process of charging off a residential mortgage loan begins when a loan becomes delinquent for 90 days and is not in the process of collection. The existing appraisal is reviewed and a lien search is obtained to determine lien position and any instances of intervening liens. A new appraisal of the property will be ordered if deemed necessary by management and a collateral evaluation is completed. The loan will then be charged down to the value indicated in the evaluation. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, or earlier in the event of either bankruptcy or if there is an amount deemed uncollectible. The collateral shortfall of the consumer loan is recommended for charge-off at this point. As noted above, Mid Penn assesses a specific allocation for commercial loans and commercial real estate loans. The remaining balance remains a nonperforming loan with the original terms and interest rate intact (not restructured). In addition, Mid Penn takes a preemptive step when any commercial loan becomes classified under its internal classification system. A preliminary collateral evaluation, in accordance with the guidance on impaired loans, is prepared using the existing collateral information in the loan file. This process allows Mid Penn to review both the credit and documentation files to determine the status of the information needed to make a collateral evaluation. This collateral evaluation is preliminary, but allows Mid Penn to determine if any potential collateral shortfalls exist. It is Mid Penn’s policy to obtain updated third-party collateral valuations on all impaired loans secured by real estate as soon as practically possible following the credit being classified as substandard nonaccrual. Prior to receipt of the updated real estate valuation, Mid Penn will use any existing real estate valuation to determine any potential allowance issues; however, no allowance recommendation will be made until such time Mid Penn is in receipt of the updated valuation. The Asset Recovery department employs an electronic tracking system to monitor the receipt of and need for updated appraisals. To date, there have been no material time lapses noted with the above processes. In some instances, Mid Penn is not holding real estate as collateral and is relying on business assets (personal property) for repayment. In these circumstances, a collateral inspection is performed by Mid Penn personnel to determine an estimated value. The value is based on net book value, as provided by the financial statements, and discounted accordingly based on determinations made by management. Occasionally, Mid Penn will employ an outside service to provide a fair estimate of value based on auction sales or private sales. Management reviews the estimates of these third parties and discounts them accordingly based on management’s judgment, if deemed necessary. For impaired loans with no valuation allowance required, the independent third party market valuations on the subject property obtained by Mid Penn as soon as practically possible following the credit being placed on nonaccrual status sometimes indicates that the loan-to-value ratio is sufficient to obviate the need for a specific allocation in spite of significant deterioration in real estate values in Mid Penn’s primary market area. These circumstances are determined on a case by case analysis of the impaired loans. Mid Penn actively monitors the values of collateral on impaired loans. This monitoring may require the modification of collateral values over time or changing circumstances by some factor, either positive or negative, from the original values. All collateral values will be assessed by management at least every 12 months for possible revaluation by an independent third party. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, Mid Penn does not separately identify individual residential mortgage loans, home equity loans and other consumer loans for impairment disclosures, unless such loans are the subject of a troubled debt restructuring agreement. Loans whose terms are modified are classified as troubled debt restructurings if the borrowers have been granted concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a troubled debt restructuring generally involve a temporary reduction in interest rate or an extension of a loan’s stated maturity date. Nonaccrual troubled debt restructurings are restored to accrual status if principal and interest payments, under the modified terms, are current for nine consecutive months after modification. Loans classified as troubled debt restructurings are designated as impaired. The allowance calculation methodology includes segregation of loan classes into risk rating categories. The borrower’s overall financial condition, repayment sources, guarantors, and value of collateral, if appropriate, are evaluated annually for commercial loans or when credit deficiencies arise, such as delinquent loan payments. Credit quality risk ratings include regulatory classifications of special mention, substandard, doubtful, and loss. Loans criticized as special mention have potential weaknesses that deserve management’s close attention. If uncorrected, the potential weaknesses may result in deterioration of the repayment prospects. Loans classified substandard have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They include loans that are inadequately protected by the current sound net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans classified doubtful have all the weaknesses inherent in loans classified substandard with the added characteristic that collection or liquidation in full, on the basis of current conditions and facts, is highly improbable. Loans classified as a loss are considered uncollectible and are charged to the allowance for loan losses. Any loans not classified as noted above are rated pass. In addition, federal and state regulatory agencies, as an integral part of their examination process, periodically review the Bank’s allowance and may require the Bank to recognize additions to the allowance based on their judgments about information available to them at the time of their examination, which may not be currently available to management. No such additions were required from any recent examinations. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate. Mid Penn had $590,035,000 and $388,313,000 of PPP loans outstanding, net of deferred fees, as of March 31, 2021 and December 31, 2020, respectively, which are guaranteed by the Small Business Administration and, thus, have no loss reserve allocated to that pool.
Acquired Loans	Acquired Loans Loans that Mid Penn acquires in connection with business combinations are recorded at fair value with no carryover of the acquired entity’s related allowance for loan losses. Loans acquired at fair value and included in the balance of loans and leases, net of unearned interest on the Consolidated Balance Sheets totaled $251,644,000 and $276,701,000 as of March 31, 2021 and December 31, 2020, respectively. The fair value of the acquired loans involves estimating the amount and timing of principal and interest cash flows expected to be collected on the loans, and discounting those cash flows at a market rate of interest. The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable discount. These loans are accounted for under ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. Loans acquired through business combinations that meet the specific criteria of ASC 310-30 are individually evaluated each period to analyze expected cash flows. To the extent that the expected cash flows of a loan have decreased due to credit deterioration, Mid Penn establishes an allowance. Loans acquired through business combinations that do not meet the specific criteria of ASC 310-30 are accounted for under ASC 310-20. These loans are initially recorded at fair value, and include credit and interest rate marks associated with acquisition accounting adjustments. Purchase premiums or discounts are subsequently amortized as an adjustment to yield over the estimated contractual lives of the loans. There is no allowance for loan losses established at the acquisition date for acquired performing loans. An allowance for loan losses is recorded for any credit deterioration in these loans subsequent to acquisition. Acquired loans that met the criteria for impaired or nonaccrual of interest prior to the acquisition may be considered performing upon acquisition, regardless of whether the customer is contractually delinquent, if Mid Penn expects to fully collect the new carrying value (i.e. fair value) of the loans. As such, Mid Penn may no longer consider the loan to be nonaccrual or nonperforming at the date of acquisition and may accrue interest on these loans, including the impact of any accretable discount. In addition, charge-offs on such loans would be first applied to the nonaccretable difference portion of the fair value adjustment.
Loan-Level Interest Rate Swaps	Loan-Level Interest Rate Swaps Beginning during the second quarter of 2020, Mid Penn entered into loan-level interest rate swaps (“swaps”) to facilitate certain customer transactions and meet their financing needs. These swaps qualify as derivatives, but are not designated as hedging instruments. A loan-level interest rate swap is a contract in which the series of interest rate flows (fixed and variable) are exchanged over the term of a loan with certain qualifying commercial loan customers, and Mid Penn simultaneously enters into an interest rate swap with a dealer counterparty with identical notional amounts and terms. The net result of these swaps is that the customer pays a fixed interest rate and Mid Penn receives a floating interest rate. The swap positions with customers are equally offset with the dealer counterparties to minimize the potential impact on Mid Penn’s financial statements. Pursuant to our agreements with the dealer counterparties, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial. Derivatives contain an element of credit risk, including the possibility that we will incur a loss because a party to the agreements, which may be a dealer counterparty or a customer, fails to meet its contractual obligations. Derivative contracts may only be executed with dealer counterparties as approved by our Board of Directors. Similarly, derivatives with customers may only be executed with customers within credit exposure limits as approved by our Board of Directors. Loan-level interest rate swaps are considered derivatives but are not accounted for using hedge accounting.
Bank Premises and Equipment Held for Sale	Bank Premises and Equipment Held for Sale Bank premises and equipment designated as held for sale are carried at the lower of cost or market value, and, at March 31, 2021 and December 31, 2020, consisted of a retail banking property which was closed and listed for sale on December 31, 2020 totaling $210,000 and in included in other assets on the Consolidated Balance Sheets.
Foreclosed Assets Held for Sale	Foreclosed Assets Held for Sale Foreclosed assets held for sale consist primarily of real estate acquired through, or in lieu of, foreclosure in settlement of debt, and are recorded at fair value less the selling costs at the date of transfer, establishing a new cost basis. Any valuation adjustments required at the date of transfer are charged to the allowance for loan losses. Subsequent to acquisition, foreclosed assets are carried at fair value less estimated costs of disposal, based upon periodic evaluations that consider changes in market conditions and development and disposal costs. Operating results from assets acquired in satisfaction of debt, including rental income less operating costs and gains or losses on the sale of, or the periodic evaluation of foreclosed assets, are recorded in noninterest expense. As of March 31, 2021, Mid Penn had $144,000 of residential real estate held in other real estate owned and $87,000 in loans for which formal foreclosure proceedings were in process. As of December 31, 2020, Mid Penn had $134,000 of residential real estate held in other real estate owned and $13,000 in loans for which formal foreclosure proceedings were in process.
Leases	Leases Mid Penn leases certain premises and equipment and, as of January 1, 2019, for all leases in effect upon adoption of Accounting Standards Update 2016-02, Leases Operating lease expense, recognized as a component of occupancy expense on the Consolidated Statements of Income, consists of a single lease cost calculated so that the remaining cost of the lease is allocated over the remaining lease term on a straight-line basis. Operating lease expense also includes variable lease payments not included in the lease liability, and any impairment of the right-of-use asset. Finance lease expense consists of the amortization of the right-of-use asset, recognized as a component of occupancy expense on the Consolidated Statements of Income, and interest expense on the lease liability, which is recorded as a component of other interest expense on the Consolidated Statements of Income. In assessing whether a contract contains a lease, Mid Penn reviews third-party agreements to determine if the contract conveys the right to control the use of identified property, plant, or equipment (defined as an identified asset by Topic 842) for a period of time in exchange for consideration, and grants Mid Penn the right to both (i) obtain substantially all of the economic benefits from the identified asset’s use, and (ii) direct the use of the identified asset throughout the term of the agreement. Upon identification that a lease agreement exists, Mid Penn performs an assessment of the consideration to be paid related to the identified asset and quantifies both the (i) lease components, consisting of consideration paid to transfer a good or service to Mid Penn, and (ii) non-lease components, consisting of consideration paid for distinct elements of the contract that are not related to securing the use of the leased asset, such as property taxes, common area maintenance, utilities, and insurance. Many of Mid Penn’s lease agreements include options to extend or renew contracts subsequent to the expiration of the initial lease term. These renewal and extension options were not included in the calculation of the right-of-use assets and lease liabilities as Mid Penn is not reasonably certain that these renewals and extensions will be utilized. Additionally, for leases that contain escalation clauses related to consumer or other price indices, Mid Penn includes the known lease payment amount as of the commencement date in the calculation of right-of-use assets and related lease liabilities. Subsequent increases in rental payments over the known amount at the commencement date due to increase in the indices will be expensed as incurred. None of Mid Penn’s lease agreements include residual value guarantees or material variable lease payments. Mid Penn does not have material restrictions or covenants imposed by leases that would impact Mid Penn’s ability to pay dividends or cause Mid Penn to incur additional financial obligations.
Investments in Limited Partnerships	Investments in Limited Partnerships Mid Penn is a limited partner in a partnership that provides low-income housing in Enola, Pennsylvania. The carrying value of Mid Penn’s investment in the limited partnership was $135,000 at March 31, 2021, and $146,000 at December 31, 2020, net of amortization, using the straight-line method. The investment in this limited partnership is reported in other assets on the Consolidated Balance Sheets, and Mid Penn’s maximum exposure to loss is limited to the carrying value of the investment. Mid Penn also has a limited partnership interest in a low-income housing project with thirty-seven apartments and common amenities in Dauphin County, Pennsylvania. The total investment in this limited partnership, net of amortization to date, was $6,527,000 and $6,682,000 on March 31, 2021 and December 31, 2020, respectively, and was included in the reported balance of other assets on the Consolidated Balance Sheet. All of the units qualified for Federal Low-Income Housing Tax Credits (“LIHTCs”) as provided for in Section 42 of the Internal Revenue Code of 1986, as amended. Mid Penn’s limited partner capital contribution totaled $7,506,000 and the investment was fully funded within a three-year ten-year ten-year
Core Deposit Intangible	Core Deposit Intangible Core deposit intangible is a measure of the value of consumer demand and savings deposits acquired in business combinations accounted for as purchases. The carrying amount of core deposit intangible was $4,039,000 and $4,311,000 at March 31, 2021 and December 31, 2020, respectively. Core deposit amortization expense was $272,000 and $310,000 for the three months ended March 31, 2021 and 2020, respectively. The core deposit intangible is being amortized over a ten-year
Goodwill	Goodwill Goodwill is the excess of the purchase price over the fair value of assets acquired in connection with past business acquisitions. The goodwill balance was $62,840,000 at both March 31, 2021 and December 31, 2020, and was comprised of (i) $39,744,000 related to the July 31, 2018 First Priority acquisition, (ii) $19,178,000 related to the January 8, 2018 Scottdale acquisition and (iii) $3,918,000 recorded as a result of the Phoenix acquisition in 2015. Goodwill is evaluated annually for impairment; however, if certain events occur which indicate goodwill might be impaired between annual tests, goodwill would be tested for impairment when such events occur. In making a potential impairment assessment of goodwill, Mid Penn considers a number of factors including operating results, business plans, economic projections, anticipated future cash flows, current market data, stock price, etc. There are inherent uncertainties related to these factors and Mid Penn’s judgment in applying them to the analysis of goodwill impairment. Mid Penn did not identify any impairment on its outstanding goodwill from its most recent comprehensive impairment evaluation which was performed as of October 31, 2020 using a qualitative analysis. Changes in economic and operating conditions could result in goodwill impairment in future periods. Subsequent to October 31, 2020, and through the date of this filing, management’s updated assessment of the Corporation’s operating results, business plans, economic projections, anticipated future cash flows, current market data, and stock price, continued to reflect no evidence of goodwill impairment. For the prior year period, and in support of its March 31, 2020 financial reports, Mid Penn management performed a “Step One” goodwill analysis to determine whether the current or expected impact from the COVID-19 global pandemic resulted in any impairment to Mid Penn’s business and the recorded value of its goodwill intangible asset. Based upon this goodwill analysis, Mid Penn management determined that there was no impairment to its goodwill.
Revenue from Contracts with Customers	Revenue from Contracts with Customers Mid Penn recognizes revenues when earned based upon (i) contractual terms as transactions occur, or (ii) as related services are provided and collectability is reasonably assured. The largest source of revenue for Mid Penn is interest income, which is primarily recognized on an accrual basis according to a written contract, such as loan and lease agreements or investment securities contracts. Mid Penn earns noninterest income through a variety of financial and transactional services such as trust and wealth management services, deposit account transaction fees, ATM debit card fees, and mortgage banking fees. Revenue is recorded for noninterest income based on the contractual terms for the service or transaction performed. In certain circumstances, noninterest income is reported net of associated expenses. On January 1, 2018, Mid Penn adopted FASB ASU 2014-09, Revenue from Contracts with Customers Mid Penn’s non-interest income revenue streams of income from fiduciary activities, service charges on deposits, ATM debit card interchange income, merchant service fees and certain components of other income are within the scope of Topic 606 and are discussed in greater detail below. Income from Fiduciary and Wealth Management Activities Income from fiduciary and wealth management activities consist of trust, wealth management, and investment management fee income, brokerage transaction fee income, and estate fee income. Trust, wealth management, and investment management fee income consists of advisory fees that are typically based on market values of clients’ managed portfolios and transaction fees for fiduciary services performed, both of which are recognized as earned. Brokerage transaction fee income includes advisory fees, which are recognized as earned on a monthly basis and transaction fees that are recognized when transactions occur. Payment is typically received in the following month. Estate fee income is recognized as services are performed over the service period, generally eighteen months. Service Charges on Deposits Service charges on deposits consist of cash management, overdraft, non-sufficient fund fees and other service charges on deposit accounts. Revenue is primarily transactional and recognized when earned, which is at the time the respective initiating transaction occurs and the related service charge is subsequently processed. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to the customers’ accounts. ATM Debit Card Interchange Income ATM debit card interchange income consists of interchange fees earned when Mid Penn’s debit cards are processed through card payments networks. The interchange fee is calculated as a percentage of the total electronic funds transfer (EFT) transaction plus a per-transaction fee, which varies based on the type of card used, the method used to process the EFT transaction, and the type of business at which the transaction was processed. Revenue is recognized daily as transactions occur and interchange fees are subsequently processed. Payment for most interchange activity is received daily, while some fees are aggregated and payment is received in the following month. Merchant Services Income Merchant services income is processed through third party providers with whom Mid Penn has partnered to provide merchant services to its business customers. Fees are charged to merchants to process their debit card transactions, cash advance services, and other related products. Mid Penn receives a percentage of the revenue generated from each joint customer relationship after the respective third-party provider has collected the fee income from the merchant. Payment is primarily received in the following month. Other Income Certain aspects of other income, such as credit card royalties, check orders, and letter of credit fees, are within the scope of Topic 606. These fees are primarily transactional, and revenue is recognized when transactions occur and the related services are subsequently processed. Payment is primarily received immediately or in the following month. Mid Penn does not exercise significant judgements in the recognition of income, as typically income is not recognized until the performance obligation has been satisfied. Mid Penn has not recognized any assets from the costs to obtain or fulfill a contract with customers for revenue streams that fall within the guidance of Topic 606.
Comprehensive Income	Comprehensive Income Comprehensive income consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes changes in unrealized gains and losses on securities available for sale arising during the period and reclassification adjustments for realized gains and losses on securities available for sale included in net income. Mid Penn also recognizes other comprehensive income (loss) from an unfunded noncontributory defined benefit plan for directors and other postretirement benefit plans covering full-time employees. These plans utilize assumptions and methods to calculate the fair value of plan assets and Mid Penn recognizes the overfunded and underfunded status of the plans on its consolidated balance sheet. Gains and losses, prior service costs and credits are recognized in other comprehensive income (loss), net of tax, until they are amortized, or immediately upon curtailment. The components of accumulated other comprehensive income (loss), net of taxes, are as follows: (Dollars in thousands) Unrealized Loss on Securities Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Balance - March 31, 2021 $ (2 ) $ 503 $ 501 Balance - December 31, 2020 $ (3 ) $ (54 ) $ (57 )
Earnings Per Common Share	Earnings Per Common Share Basic earnings per common share are computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during each of the periods presented. Diluted earnings per common share are calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding plus common shares that would have been outstanding if dilutive potential common shares, consisting of unvested restricted stock, had been issued. The following data shows the amounts used in computing basic and diluted earnings per common share. (Dollars in thousands, except per share data) Three Months Ended March 31, 2021 2020 Net income $ 9,312 $ 3,818 Weighted average common shares outstanding (basic) 8,415,586 8,480,975 Effect of dilutive unvested restricted stock grants 14,599 4,856 Weighted average common shares outstanding (diluted) 8,430,185 8,485,831 Basic earnings per common share $ 1.11 $ 0.45 Diluted earnings per common share $ 1.10 $ 0.45 There were no antidilutive instruments at March 31, 2021 and 2020.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Components of Accumulated Other Comprehensive Income (Loss), Net of Taxes	The components of accumulated other comprehensive income (loss), net of taxes, are as follows: (Dollars in thousands) Unrealized Loss on Securities Defined Benefit Plans Accumulated Other Comprehensive Income (Loss) Balance - March 31, 2021 $ (2 ) $ 503 $ 501 Balance - December 31, 2020 $ (3 ) $ (54 ) $ (57 )
Basic and Diluted Earnings Per Common Share	The following data shows the amounts used in computing basic and diluted earnings per common share. (Dollars in thousands, except per share data) Three Months Ended March 31, 2021 2020 Net income $ 9,312 $ 3,818 Weighted average common shares outstanding (basic) 8,415,586 8,480,975 Effect of dilutive unvested restricted stock grants 14,599 4,856 Weighted average common shares outstanding (diluted) 8,430,185 8,485,831 Basic earnings per common share $ 1.11 $ 0.45 Diluted earnings per common share $ 1.10 $ 0.45

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Securities Financing Transactions Disclosures [Abstract]
Unrealized Gain (Loss) on Investments	The amortized cost, fair value, and unrealized gains and losses on investment securities at March 31, 2021 and December 31, 2020 are as follows: (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value March 31, 2021 Available-for-sale debt securities: Mortgage-backed U.S. government agencies $ 2 $ — $ — $ 2 Corporate debt securities 3,250 — 2 3,248 Total available-for-sale debt securities 3,252 — 2 3,250 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 16,980 $ 46 $ 420 $ 16,606 Mortgage-backed U.S. government agencies 35,727 866 3 36,590 State and political subdivision obligations 65,335 2,455 53 67,737 Corporate debt securities 12,518 151 83 12,586 Total held-to-maturity debt securities 130,560 3,518 559 133,519 Total $ 133,812 $ 3,518 $ 561 $ 136,769 (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value December 31, 2020 Available-for-sale debt securities: Mortgage-backed U.S. government agencies $ 2 $ — $ — $ 2 Corporate debt securities 5,750 — 4 5,746 Total available-for-sale debt securities 5,752 — 4 5,748 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 11,511 $ 66 $ — $ 11,577 Mortgage-backed U.S. government agencies 40,810 948 15 41,743 State and political subdivision obligations 65,449 3,295 6 68,738 Corporate debt securities 10,522 215 1 10,736 Total held-to-maturity debt securities 128,292 4,524 22 132,794 Total $ 134,044 $ 4,524 $ 26 $ 138,542
Schedule of Fair Value and Unrealized Loss on Debt Security Investments in a Continuous Unrealized Loss Position	The following tables present gross unrealized losses and fair value of debt security investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2021 and December 31, 2020. (Dollars in thousands) Less Than 12 Months 12 Months or More Total Number Number Number of Fair Unrealized of Fair Unrealized of Fair Unrealized March 31, 2021 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale debt securities: Corporate debt securities 1 $ 998 $ 2 0 $ — $ — 1 $ 998 $ 2 Total temporarily impaired available-for-sale debt securities 1 $ 998 $ 2 0 $ — $ — 1 $ 998 $ 2 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies 7 $ 11,570 $ 420 0 $ — $ — 7 $ 11,570 $ 420 Mortgage-backed U.S. government agencies 3 1,835 3 0 — — 3 1,835 3 State and political subdivision obligations 13 6,152 53 0 — — 13 6,152 53 Corporate debt securities 4 4,916 83 0 — — 4 4,916 83 Total temporarily impaired held-to-maturity debt securities 27 $ 24,473 $ 559 0 $ — $ — 27 $ 24,473 $ 559 Total 28 $ 25,471 $ 561 0 $ — $ — 28 $ 25,471 $ 561 (Dollars in thousands) Less Than 12 Months 12 Months or More Total Number Number Number of Fair Unrealized of Fair Unrealized of Fair Unrealized December 31, 2020 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale securities: Corporate debt securities 2 $ 3,497 $ 4 0 $ — $ — 2 $ 3,497 $ 4 Total temporarily impaired available-for-sale securities 2 $ 3,497 $ 4 0 $ — $ — 2 $ 3,497 $ 4 Held-to-maturity securities: Mortgage-backed U.S. government agencies 8 $ 5,336 $ 15 0 $ — $ — 8 $ 5,336 $ 15 State and political subdivision obligations 2 801 6 0 — — 2 801 6 Corporate debt securities 1 449 1 0 — — 1 449 1 Total temporarily impaired held to maturity securities 11 $ 6,586 $ 22 0 $ — $ — 11 $ 6,586 $ 22 Total 13 $ 10,083 $ 26 0 $ — $ — 13 $ 10,083 $ 26
Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Debt Securities	Gross realized gains and losses on sales of available-for-sale debt securities for the three months ended March 31, 2021 and 2020 are shown in the table below. No sales of available-for-sale securities were executed during the three months ended March 31, 2021. (Dollars in thousands) Three Months Ended March 31, 2021 2020 Realized gains $ — $ 137 Realized losses — (5 ) Net gains $ — $ 132
Investments Classified by Contractual Maturity Date	The table below illustrates the maturity distribution of investment securities at amortized cost and fair value as of March 31, 2021. (Dollars in thousands) Available-for-sale Held-to-maturity Amortized Fair Amortized Fair March 31, 2021 Cost Value Cost Value Due in 1 year or less $ — $ — $ 3,465 $ 3,511 Due after 1 year but within 5 years 2,250 2,250 38,808 40,397 Due after 5 years but within 10 years 1,000 998 52,560 53,021 Due after 10 years — — — — 3,250 3,248 94,833 96,929 Mortgage-backed securities 2 2 35,727 36,590 $ 3,252 $ 3,250 $ 130,560 $ 133,519

Loans and Allowance for Loan _2

Loans and Allowance for Loan and Lease Losses (Tables)	3 Months Ended
	Mar. 31, 2021
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Type of Loan Portfolio Summarized by the Aggregate Risk Rating	As of March 31, 2021 and December 31, 2020, the types of loans in Mid Penn’s portfolio, summarized using Mid Penn’s internal risk rating system between those rated “pass” (net of deferred fees and costs of $17,992,000 as of March 31, 2021 and $9,084,000 as of December 31, 2020) which comprise the vast majority of the portfolio, and those classified as “special mention” and “substandard”, are as follows: (Dollars in thousands) Special March 31, 2021 Pass Mention Substandard Total Commercial and industrial $ 951,489 $ 10,272 $ 2,284 $ 964,045 Commercial real estate 1,119,845 8,905 6,910 1,135,660 Commercial real estate - construction 264,915 — 30 264,945 Residential mortgage 196,566 52 1,170 197,788 Home equity 73,087 2 2,334 75,423 Consumer 8,375 — — 8,375 $ 2,614,277 $ 19,231 $ 12,728 $ 2,646,236 (Dollars in thousands) Special December 31, 2020 Pass Mention Substandard Total Commercial and industrial $ 739,306 $ 9,928 $ 3,120 $ 752,354 Commercial real estate 1,084,123 1,708 13,825 1,099,656 Commercial real estate - construction 248,882 — 31 248,913 Residential mortgage 200,544 53 1,244 201,841 Home equity 71,856 3 2,365 74,224 Consumer 7,053 — — 7,053 $ 2,351,764 $ 11,692 $ 20,585 $ 2,384,041
Impaired Loans by Loan Portfolio Class	Impaired loans by loan portfolio class as of March 31, 2021 and December 31, 2020 are summarized as follows: March 31, 2021 December 31, 2020 (Dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With no related allowance recorded: Commercial and industrial $ 143 $ 174 $ — $ 899 $ 931 $ — Commercial real estate 595 973 — 8,215 8,574 — Commercial real estate - construction 30 34 — 31 34 — Residential mortgage 758 786 — 818 842 — Home equity 2,334 2,337 — 2,365 2,395 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ — $ — $ — $ — Commercial real estate 1,408 1,690 — 1,419 1,693 — Commercial real estate - construction — — — — — — Residential mortgage 309 557 — 323 568 — Home equity — 12 — — 13 — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 225 $ 253 $ 68 $ 553 $ 574 $ 533 Commercial real estate 874 926 263 887 994 274 Commercial real estate - construction — — — — — — Residential mortgage — — — — — — Home equity — — — — — — Consumer — — — — — — Total Impaired Loans: Commercial and industrial $ 368 $ 427 $ 68 $ 1,452 $ 1,505 $ 533 Commercial real estate 2,877 3,589 263 10,521 11,261 274 Commercial real estate - construction 30 34 — 31 34 — Residential mortgage 1,067 1,343 — 1,141 1,410 — Home equity 2,334 2,349 — 2,365 2,408 — Consumer — — — — — —
Average Recorded Investment Of Impaired Loans And Related Interest Income By Loan Portfolio Class	The average recorded investment of impaired loans and related interest income recognized for the three months ended March 31, 2021 and 2020 are summarized as follows: Three Months Ended March 31, 2021 March 31, 2020 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 753 $ — $ 890 $ — Commercial real estate 4,405 — 7,430 — Commercial real estate - construction 31 — 40 — Residential mortgage 787 8 782 6 Home equity 2,350 — 24 — Consumer — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ 2 $ — Commercial real estate 1,414 — 1,420 — Commercial real estate - construction — — — — Residential mortgage 317 — 374 — Home equity — — 1 — Consumer — — — — With an allowance recorded: Commercial and industrial $ 157 $ — $ 4 $ — Commercial real estate 880 — 550 — Commercial real estate - construction — — — — Residential mortgage — — — — Home equity — — — — Consumer — — — — Total Impaired Loans: Commercial and industrial $ 910 $ — $ 896 $ — Commercial real estate 6,699 — 9,400 — Commercial real estate - construction 31 — 40 — Residential mortgage 1,104 8 1,156 6 Home equity 2,350 — 25 — Consumer — — — —
Non-accrual Loans by Classes of the Loan Portfolio Including Loans Acquired With Credit Deterioration	Nonaccrual loans by loan portfolio class, including loans acquired with credit deterioration, as of March 31, 2021 and December 31, 2020 are summarized as follows: (Dollars in thousands) March 31, 2021 December 31, 2020 Commercial and industrial $ 368 $ 1,452 Commercial real estate 2,877 10,520 Commercial real estate - construction 30 31 Residential mortgage 611 679 Home equity 2,334 2,365 $ 6,220 $ 15,047
Loan Portfolio Summarized by the Past Due Status	The classes of the loan portfolio summarized by the past due status as of March 31, 2021 and December 31, 2020 are summarized as follows: Loans (Dollars in thousands) 30-59 60-89 Greater Receivable > Days Past Days Past than 90 Total Past 90 Days and March 31, 2021 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ 800 $ 32 $ 336 $ 1,168 $ 962,877 $ 964,045 $ — Commercial real estate 101 555 863 1,519 1,132,733 1,134,252 — Commercial real estate - construction — — — — 264,945 264,945 — Residential mortgage 236 1 227 464 197,015 197,479 — Home equity 309 — 2,312 2,621 72,802 75,423 — Consumer — 4 — 4 8,371 8,375 — Loans acquired with credit deterioration: Commercial and industrial — — — — — — — Commercial real estate — — 1,395 1,395 13 1,408 — Commercial real estate - construction — — — — — — — Residential mortgage — — 159 159 150 309 — Home equity — — — — — — — Consumer — — — — — — — Total $ 1,446 $ 592 $ 5,292 $ 7,330 $ 2,638,906 $ 2,646,236 $ — Loans (Dollars in thousands) 30-59 60-89 Greater Receivable > Days Past Days Past than 90 Total Past 90 Days and December 31, 2020 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ 365 $ 1,017 $ 1,377 $ 2,759 $ 749,595 $ 752,354 $ — Commercial real estate 1,096 — 7,668 8,764 1,089,473 1,098,237 — Commercial real estate - construction — — — — 248,913 248,913 — Residential mortgage 126 — 282 408 201,110 201,518 — Home equity 71 22 2,343 2,436 71,788 74,224 — Consumer — 6 — 6 7,047 7,053 — Loans acquired with credit deterioration: Commercial and industrial — — — — — — — Commercial real estate 9 — 1,402 1,411 8 1,419 — Commercial real estate - construction — — — — — — — Residential mortgage — — 168 168 155 323 — Home equity — — — — — — — Consumer — — — — — — — Total $ 1,667 $ 1,045 $ 13,240 $ 15,952 $ 2,368,089 $ 2,384,041 $ —
Allowance and Recorded Investment in Financing Receivables	The following tables summarize the allowance and recorded investments in loans receivable. (Dollars in thousands) As of, and for the three months ended, March 31, 2021 Commercial and industrial Commercial real estate Commercial real estate - construction Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance, January 1, 2021 $ 3,066 $ 8,655 $ 134 $ 429 $ 507 $ 1 $ 590 $ 13,382 Charge-offs (859 ) — — (3 ) — (3 ) — (865 ) Recoveries 1 56 — 9 — 8 — 74 Provisions (credits) 780 233 (12 ) 3 21 (5 ) (20 ) 1,000 Ending balance, March 31, 2021 2,988 8,944 122 438 528 1 570 13,591 Individually evaluated for impairment 68 263 — — — — — 331 Ending balance: Collectively evaluated for impairment $ 2,920 $ 8,681 $ 122 $ 438 $ 528 $ 1 $ 570 $ 13,260 Loans receivables: Ending balance $ 964,045 $ 1,135,660 $ 264,945 $ 197,788 $ 75,423 $ 8,375 $ — $ 2,646,236 Ending balance: individually evaluated for impairment 368 1,469 30 758 2,334 — — 4,959 Ending balance: acquired with credit deterioration — 1,408 — 309 — — — 1,717 Ending balance: collectively evaluated for impairment $ 963,677 $ 1,132,783 $ 264,915 $ 196,721 $ 73,089 $ 8,375 $ — $ 2,639,560 (Dollars in thousands) December 31, 2020 Commercial and industrial Commercial real estate Commercial real estate - construction Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Ending balance $ 3,066 $ 8,655 $ 134 $ 429 $ 507 $ 1 $ 590 $ 13,382 Ending balance: individually evaluated for impairment 533 274 — — — — — 807 Ending balance: collectively evaluated for impairment $ 2,533 $ 8,381 $ 134 $ 429 $ 507 $ 1 $ 590 $ 12,575 Loans receivable: Ending balance $ 752,354 $ 1,099,656 $ 248,913 $ 201,841 $ 74,224 $ 7,053 $ — $ 2,384,041 Ending balance: individually evaluated for impairment 1,452 9,102 31 818 2,365 — — 13,768 Ending balance: acquired with credit deterioration — 1,419 — 323 — — — 1,742 Ending balance: collectively evaluated for impairment $ 750,902 $ 1,089,135 $ 248,882 $ 200,700 $ 71,859 $ 7,053 $ — $ 2,368,531 (Dollars in thousands) As of, and for the three months ended, March 31, 2020 Commercial and industrial Commercial real estate Commercial real estate - construction Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance, January 1, 2020 $ 2,341 $ 6,259 $ 51 $ 417 $ 442 $ 2 $ 3 $ 9,515 Charge-offs (43 ) — — — — (15 ) — (58 ) Recoveries 1 1 — 3 — 2 — 7 Provisions (credits) 128 370 6 16 6 13 11 550 Ending balance, March 31, 2020 2,427 6,630 57 436 448 2 14 10,014 Individually evaluated for impairment 3 190 — — — — — 193 Ending balance: collectively evaluated for impairment $ 2,424 $ 6,440 $ 57 $ 436 $ 448 $ 2 $ 14 $ 9,821 Loans receivables: Ending balance $ 351,339 $ 939,995 $ 205,248 $ 230,047 $ 64,610 $ 6,910 $ — $ 1,798,149 Ending balance: individually evaluated for impairment 897 7,649 39 748 24 — — 9,357 Ending balance: acquired with credit deterioration — 1,423 — 368 1 — — 1,792 Ending balance: collectively evaluated for impairment $ 350,442 $ 930,923 $ 205,209 $ 228,931 $ 64,585 $ 6,910 $ — $ 1,787,000
Troubled Debt Restructurings	The recorded investments in troubled debt restructured loans at March 31, 2021 and December 31, 2020 are as follows: (Dollars in thousands) Pre-Modification Post-Modification March 31, 2021 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 8 $ 8 $ 6 Commercial real estate 1,806 1,707 911 Commercial real estate - construction 40 40 30 Residential mortgage 728 725 501 $ 2,582 $ 2,480 $ 1,448 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2020 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 8 $ 8 $ 6 Commercial real estate 1,806 1,707 933 Commercial real estate - construction 40 40 31 Residential mortgage 728 725 510 $ 2,582 $ 2,480 $ 1,480
Schedule of Accretion of Purchased Impaired Loan	The following tables provide activity for the accretable yield of acquired impaired loans from the Phoenix (March 2015), Scottdale (January 2018), and First Priority (July 2018) acquisitions for the three months ended March 31, 2021 and 2020. (Dollars in thousands) Three Months Ended March 31, 2021 2020 Accretable yield, beginning of period $ 40 $ 89 Accretable yield amortized to interest income — (17 ) Accretable yield, end of period $ 40 $ 72

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Summary of Operating and Finance Lease Right-of-Use Assets and Related Lease Liabilities	Below is a summary of the operating and finance lease right-of-use assets and related lease liabilities, as well as the weighted average lease term (in years) and weighted average discount rate for each of the lease classifications as of March 31, 2021 and December 31, 2020. (Dollars in thousands) March 31, 2021 December 31, 2020 Operating Leases Finance Lease Operating Leases Finance Lease Right of use asset $ 10,791 $ 3,222 $ 10,157 $ 3,267 Lease liability $ 11,828 $ 3,446 $ 11,200 $ 3,467 Weighted average remaining lease term (in years) 7.81 17.92 8.05 18.17 Weighted average discount rate 3.15 % 3.81 % 3.30 % 3.81 %
Summary of Lease Costs	A summary of lease costs during the three months ended March 31, 2021 and 2020 are presented below. Interest expense on finance lease liabilities is included in other interest expense, while all other lease costs are included in occupancy expense on Mid Penn’s Consolidated Statements of Income. (Dollars in thousands) Three Months Ended March 31, 2021 2020 Finance lease cost: Amortization of right-of-use asset $ 45 $ 45 Interest expense on lease liability 33 34 Total finance lease cost 78 79 Operating lease cost 516 528 Short-term and equipment lease cost 10 9 Variable lease cost — — Sublease income (9 ) (6 ) Total lease costs $ 595 $ 610
Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities	A summary of cash paid for amounts included in the measurement of lease liabilities is presented below. (Dollars in thousands) Three Months Ended March 31, 2021 March 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 33 $ 34 Operating cash flows from operating leases 522 544 Financing cash flows from finance leases 21 21
Summary of Maturity Analysis of Operating and Finance Lease Liabilities and Reconciliation of Undiscounted Cash Flows	A maturity analysis of operating and finance lease liabilities and a reconciliation of the undiscounted cash flows to the total operating and finance lease liability amounts is presented below. (Dollars in thousands) March 31, 2021 Operating Leases Finance Lease Lease payments due: Within one year $ 1,557 $ 163 After one but within two years 2,061 217 After two but within three years 1,815 217 After three but within four years 1,760 252 After four but within five years 1,373 259 After five years 4,810 3,733 Total undiscounted cash flows 13,376 4,841 Discount on cash flows (1,548 ) (1,395 ) Total lease liability $ 11,828 $ 3,446

Loan-Level Interest Rate Swaps

Loan-Level Interest Rate Swaps (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional Amount, and Collateral Posted Related to Loan-level Interest Rate Swaps	The fair value, notional amount, and collateral posted related to loan-level interest rate swaps are presented below. (Dollars in thousands) March 31, 2021 December 31, 2020 Interest Rate Swap Contracts - Commercial Loans: Fair Value (a) $ 1,185 $ 489 Notional Amount 48,864 22,331 Cash Collateral Posted (b) 500 500 (a) Included in other liabilities as of March 31, 2021 and other assets as of December 31, 2020, respectively, on the Consolidated Balance Sheets (b) Included in cash and due from banks on the Consolidated Balance Sheet
Schedule of Gross Amounts of Commercial Loan Swap Derivatives, Amounts Offset and Carrying Values	The gross amounts of commercial loan swap derivatives, the amounts offset and the carrying values in the Consolidated Balance Sheets, and the collateral pledged to support such agreements are presented below. (Dollars in thousands) March 31, 2021 December 31, 2020 Interest Rate Swap Contracts - Commercial Loans: Gross amounts recognized $ 1,185 $ 489 Gross amounts offset 1,185 489 Net Amounts Presented in the Consolidated Balance Sheets — — Gross amounts not offset: Financial instruments — — Cash collateral 500 500 Net Amounts $ 500 $ 500

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Assets Measured at Fair Value on a Recurring Basis	The following tables illustrate the assets measured at fair value on a recurring basis segregated by hierarchy fair value levels. Fair value measurements at March 31, 2021 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: March 31, 2021 (Level 1) (Level 2) (Level 3) Available-for-sale securities: Mortgage-backed U.S. government agencies $ 2 $ — $ 2 $ — Corporate debt securities 3,248 — 3,248 — Other assets: Equity securities 508 508 — — Total $ 3,758 $ 508 $ 3,250 $ — Fair value measurements at December 31, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2020 (Level 1) (Level 2) (Level 3) Available-for-sale securities: U.S. government agencies $ 2 $ — $ 2 $ — Corporate debt securities 5,746 — 5,746 — Other assets: Equity securities 515 515 — — Interest rate swap agreements 489 — 489 — Total $ 6,752 $ 515 $ 6,237 $ —
Fair Value Measurements, Nonrecurring	The following tables illustrate the assets measured at fair value on a nonrecurring basis segregated by hierarchy fair value levels. Fair value measurements at March 31, 2021 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: March 31, 2021 (Level 1) (Level 2) (Level 3) Impaired Loans $ 897 $ — $ — $ 897 Foreclosed Assets Held for Sale 77 — — 77 Fair value measurements at December 31, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2020 (Level 1) (Level 2) (Level 3) Impaired Loans $ 800 $ — $ — $ 800 Foreclosed Assets Held for Sale 77 — — 77
Fair Value Measurement Inputs and Valuation Techniques	The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis and for which Mid Penn has utilized Level 3 inputs to determine the fair value. (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements March 31, 2021 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 897 Appraisal of collateral (a), (b) Appraisal adjustments (b) 24% - 100% 39% Foreclosed Assets Held for Sale 77 Appraisal of collateral (a), (b) Appraisal adjustments (b) 27% - 27% 27% (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements December 31, 2020 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 800 Appraisal of collateral (a), (b) Appraisal adjustments (b) 25% - 100% 40% Foreclosed Assets Held for Sale 77 Appraisal of collateral (a), (b) Appraisal adjustments (b) 27% - 27% 27% (a) Fair value is generally determined through independent appraisals of the underlying collateral, which generally includes various Level 3 inputs which are not observable. (b) Appraisals may be adjusted downward by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal. Higher downward adjustments are caused by negative changes to the collateral or conditions in the real estate market, actual offers or sales contracts received, or age of the appraisal.
Fair Value, by Balance Sheet Grouping	The following table summarizes the carrying value and fair value of financial instruments at March 31, 2021 and December 31, 2020. (Dollars in thousands) March 31, 2021 December 31, 2020 Carrying Fair Carrying Fair Value Value Value Value Financial assets: Cash and cash equivalents $ 427,371 $ 427,371 $ 303,724 $ 303,724 Available-for-sale investment securities 3,250 3,250 5,748 5,748 Held-to-maturity investment securities 130,560 133,519 128,292 132,794 Equity securities 508 508 515 515 Loans held for sale 25,842 26,434 25,506 26,262 Net loans and leases 2,632,645 2,716,155 2,370,659 2,444,105 Restricted investment in bank stocks 6,860 6,860 7,594 7,594 Accrued interest receivable 11,855 11,855 3,619 3,619 Interest rate swap agreements — — 489 489 Financial liabilities: Deposits $ 2,666,827 2,670,017 $ 2,474,580 $ 2,496,799 Short-term borrowings 307,753 307,753 125,617 125,617 Long-term debt (a) 71,584 65,776 71,648 70,498 Subordinated debt 44,586 46,784 44,580 43,098 Accrued interest payable 1,902 1,902 2,007 2,007 Interest rate swap agreements 1,185 1,185 — — (a) Long-term debt excludes finance lease obligations.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present the carrying amount, fair value, and placement in the fair value hierarchy of Mid Penn’s financial instruments as of March 31, 2021 and December 31, 2020. Carrying values approximate fair values for cash and cash equivalents, restricted investment in bank stocks, accrued interest receivable and payable, and short-term borrowings. Other than cash and cash equivalents, which are considered Level 1 Inputs and mortgage servicing rights, which are Level 3 Inputs, these instruments are Level 2 Inputs. These tables exclude financial instruments for which the carrying amount approximates fair value, not previously disclosed. Fair Value Measurements Quoted Prices in Active Markets Significant (Dollars in thousands) for Identical Assets Significant Other Unobservable Carrying or Liabilities Observable Inputs Inputs March 31, 2021 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 130,560 $ 133,519 $ — $ 133,519 $ — Loans held for sale 25,842 26,434 — 26,434 — Net loans and leases 2,632,645 2,716,155 — — 2,716,155 Financial instruments - liabilities Deposits $ 2,666,827 $ 2,670,017 $ — $ 2,670,017 $ — Long-term debt (a) 71,584 65,776 — 65,776 — Subordinated debt 44,586 46,784 — 46,784 — Fair Value Measurements Quoted Prices in Active Markets Significant (Dollars in thousands) for Identical Assets Significant Other Unobservable Carrying or Liabilities Observable Inputs Inputs December 31, 2020 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 128,292 $ 132,794 $ — $ 132,794 $ — Loans held for sale 25,506 26,262 — 26,262 — Net loans and leases 2,370,659 2,444,105 — — 2,444,105 Financial instruments - liabilities Deposits $ 2,474,580 $ 2,496,799 $ — $ 2,496,799 $ — Long-term debt (a) 71,648 70,498 — 70,498 — Subordinated debt 44,580 43,098 — 43,098 — (a) Long-term debt excludes finance lease obligations.

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2021
Maturities Of Long Term Debt [Abstract]
Long-term Debt Outstanding by Due Date	The following table presents a summary of long-term debt as of March 31, 2021 and December 31, 2020. (Dollars in thousands) March 31, 2021 December 31, 2020 FHLB fixed rate instruments: Due April 2022, 0.86343% $ 70,000 $ 70,000 Due August 2026, 4.80% 1,544 1,606 Due February 2027, 6.71% 40 42 Total FHLB fixed rate instruments 71,584 71,648 Lease obligations included in long-term debt 3,446 3,467 Total long-term debt $ 75,030 $ 75,115

Defined Benefit Plans (Tables)

Defined Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2021
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]
Schedule of Net Periodic Benefit Costs	The components of net periodic benefit costs from these defined benefit plans are as follows: Three Months Ended March 31, (Dollars in thousands) Pension Benefits Other Benefits 2021 2020 2021 2020 Service cost $ 33 $ 20 $ 1 $ — Interest cost 40 45 2 — Expected return on plan assets (57 ) (68 ) — — Accretion of prior service cost — — (5 ) (5 ) Settlement gain (49 ) — — — Net periodic benefit income $ (33 ) $ (3 ) $ (2 ) $ (5 ) Service costs are reported as a component of salaries and employee benefits on the Consolidated Statements of Income, while interest costs, expected return on plan assets and amortization (accretion) of prior service cost are reported as a component of other income.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details)	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2021USD ($)Apartmentshares	Mar. 31, 2020USD ($)shares	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Mar. 31, 2021USD ($)
Loans and leases receivable, net, carrying amount	$ 2,632,645,000		$ 2,632,645,000			$ 2,370,659,000	$ 2,632,645,000
Loans and leases, net of unearned interest	251,644,000		251,644,000			276,701,000	251,644,000
Bank premises and equipment held for sale	210,000		$ 210,000			210,000	210,000
Asset held for sale, description			Bank premises and equipment designated as held for sale are carried at the lower of cost or market value, and, at March 31, 2021 and December 31, 2020, consisted of a retail banking property which was closed and listed for sale on December 31, 2020 totaling $210,000 and in included in other assets on the Consolidated Balance Sheets.
Residential real estate held in other real estate owned	144,000		$ 144,000			134,000	144,000
Foreclosure proceedings in process	87,000		87,000			13,000	87,000
Carrying value of investment in limited partnership	135,000		$ 135,000			146,000	135,000
Number of apartments under the project | Apartment			37
Limited partner capital contribution	7,506,000		$ 7,506,000				7,506,000
Limited partner capital contribution, funded period			3 years
Project investment amortization period			10 years
Amortization expense			$ 281,000	$ 323,000
Goodwill	62,840,000		62,840,000			62,840,000	62,840,000
Goodwill, Impairment Loss		$ 0	$ 0
Number of antidilutive shares | shares			0	0
First Priority Financial Corp. [Member]
Goodwill acquired			$ 39,744,000			39,744,000
Scottdale Bank and Trust Company [Member]
Goodwill acquired			19,178,000			19,178,000
Phoenix Bancorp Incorporated [Member]
Goodwill acquired			3,918,000			3,918,000
Core Deposit Intangible [Member]
Intangible assets, net	4,039,000		4,039,000			4,311,000	4,039,000
Amortization expense			$ 272,000	$ 310,000
Core Deposit Intangible, Amortization Period			10 years
Impairment of core deposit intangible			$ 0
Intangible assets, growth recognized			$ 192,247,000			$ 562,186,000
Finite Lived Intangible Assets Growth Percentage			8.00%			29.00%
Scenario Forecast [Member]
Total LIHTCs amount awarded for the project					$ 8,530,000
Annual LIHTCs amount under the housing project					$ 853,000
Project investment recognition period					10 years
Other Assets [Member]
Carrying value of investment in limited partnership	6,527,000		$ 6,527,000			$ 6,682,000	6,527,000
Non Interest Expense [Member]
Asset held for sale, impairment charge			0	0
Reserve for Off-balance Sheet Activities [Member]
Valuation allowances and reserves, balance	$ 66,000		$ 66,000			66,000	$ 66,000
Maximum [Member]
Non-residential consumer loans charged off on contractual basis in event of bankruptcy, in period	120 days		120 days				120 days
Commercial Portfolio [Member]
Loan terms			1 year
Loan to value ratio	80.00%		80.00%				80.00%
Residential Portfolio [Member] | Maximum [Member]
Loan terms			30 years
Loan to value ratio	100.00%		100.00%				100.00%
Loan to value ratio, exposure after private mortgage insurance			85.00%
Small Business Administration [Member] | PPP Loans [Member]
Loans and leases receivable, net, carrying amount	$ 590,035,000		$ 590,035,000			388,313,000	$ 590,035,000
Loans and leases receivable, disbursed amount			$ 335,589,000			254,446,000
Loan guarantee description			The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term.
Nonrefundable loan processing fees received	15,882,000		$ 15,882,000			20,883,000	36,765,000
Deferred loan processing fees	18,581,000		18,581,000			7,746,000	18,581,000
Proceeds from deferred loan processing fees			14,988,000			3,593,000
Loan processing fees			5,047,000	0
Loss reserve			$ 0			0
Small Business Administration [Member] | Maximum [Member] | PPP Loans [Member]
Processing fee percentage			5.00%
Small Business Administration [Member] | Minimum [Member] | PPP Loans [Member]
Processing fee percentage			1.00%
Equity Securities [Member]
Equity securities, fair value	508,000		$ 508,000			515,000	508,000
Equity Securities [Member] | ASU 2016-01 [Member]
Equity securities, fair value	$ 508,000		508,000			$ 515,000	$ 508,000
Equity securities sold			$ 0	$ 0
Home equity lines of credit [Member] | Maximum [Member]
Loan terms			20 years
Loan to value ratio	85.00%		85.00%				85.00%
Home Equity Lines Of Credit [Member] | Maximum [Member]
Loan terms			5 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - (Components of Accumulated Other Comprehensive Income (Loss), Net of Taxes) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Unrealized Loss on Securities	$ (2)	$ (3)
Defined Benefit Plans	503	(54)
Accumulated Other Comprehensive Income (Loss)	$ 501	$ (57)

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (Basic and Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 9,312	$ 3,818
Weighted average common shares outstanding (basic)	8,415,586	8,480,975
Effect of dilutive unvested restricted stock grants	14,599	4,856
Weighted average common shares outstanding (diluted)	8,430,185	8,485,831
Basic earnings per common share	$ 1.11	$ 0.45
Diluted earnings per common share	$ 1.10	$ 0.45

Investment Securities (Unrealiz

Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	$ 3,252	$ 5,752
Available-for-sale debt securities, Unrealized Losses	2	4
Available-for-sale debt securities, Fair Value	3,250	5,748
Held-to-maturity debt securities, Amortized Cost	130,560	128,292
Held-to-maturity debt securities, Unrealized Gains	3,518	4,524
Held-to-maturity debt securities, Unrealized Losses	559	22
Held-to-maturity debt securities, Fair Value	133,519	132,794
Available-for-sale securities and Held-to-maturity debt securities, Amortized Cost	133,812	134,044
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Gains	3,518	4,524
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Losses	561	26
Available-for-sale securities and Held-to-maturity debt securities, Fair Value	136,769	138,542
U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Fair Value		2
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Held-to-maturity debt securities, Amortized Cost	16,980	11,511
Held-to-maturity debt securities, Unrealized Gains	46	66
Held-to-maturity debt securities, Unrealized Losses	420
Held-to-maturity debt securities, Fair Value	16,606	11,577
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	2	2
Available-for-sale debt securities, Fair Value	2	2
Held-to-maturity debt securities, Amortized Cost	35,727	40,810
Held-to-maturity debt securities, Unrealized Gains	866	948
Held-to-maturity debt securities, Unrealized Losses	3	15
Held-to-maturity debt securities, Fair Value	36,590	41,743
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Held-to-maturity debt securities, Amortized Cost	65,335	65,449
Held-to-maturity debt securities, Unrealized Gains	2,455	3,295
Held-to-maturity debt securities, Unrealized Losses	53	6
Held-to-maturity debt securities, Fair Value	67,737	68,738
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	3,250	5,750
Available-for-sale debt securities, Unrealized Losses	2	4
Available-for-sale debt securities, Fair Value	3,248	5,746
Held-to-maturity debt securities, Amortized Cost	12,518	10,522
Held-to-maturity debt securities, Unrealized Gains	151	215
Held-to-maturity debt securities, Unrealized Losses	83	1
Held-to-maturity debt securities, Fair Value	$ 12,586	$ 10,736

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 105,650,000	$ 102,959,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List]	us-gaap:CollateralPledgedMember	us-gaap:CollateralPledgedMember
Available for sale securities executed	$ 0
FHLB [Member]
Schedule of Investments [Line Items]
Letter of credit outstanding, amount	$ 263,800,000	$ 288,950,000

Investment Securities (Schedule

Investment Securities (Schedule of Fair Value and Unrealized Loss on Debt Security Investments in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Mar. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	1	2
Available-for-sale securities, Less than 12 Months: Fair Value	$ 998	$ 3,497
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 2	$ 4
Available-for-sale securities, 12 Months or More: Number of Securities | security	0	0
Available-for-sale securities, Total: Number of Securities | security	1	2
Available-for-sale securities, Total: Fair Value	$ 998	$ 3,497
Available-for-sale securities, Total: Unrealized Losses	$ 2	$ 4
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	27	11
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 24,473	$ 6,586
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 559	$ 22
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	0
Held-to-maturity securities, Total: Number of Securities | security	27	11
Held-to-maturity securities, Total: Fair Value	$ 24,473	$ 6,586
Held-to-maturity securities, Total: Unrealized Losses	$ 559	$ 22
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security	28	13
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value	$ 25,471	$ 10,083
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 561	$ 26
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security	0	0
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security	28	13
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value	$ 25,471	$ 10,083
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses	$ 561	$ 26
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	7
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 11,570
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 420
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0
Held-to-maturity securities, Total: Number of Securities | security	7
Held-to-maturity securities, Total: Fair Value	$ 11,570
Held-to-maturity securities, Total: Unrealized Losses	$ 420
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	1	2
Available-for-sale securities, Less than 12 Months: Fair Value	$ 998	$ 3,497
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 2	$ 4
Available-for-sale securities, 12 Months or More: Number of Securities | security	0	0
Available-for-sale securities, Total: Number of Securities | security	1	2
Available-for-sale securities, Total: Fair Value	$ 998	$ 3,497
Available-for-sale securities, Total: Unrealized Losses	$ 2	$ 4
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	4	1
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 4,916	$ 449
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 83	$ 1
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	0
Held-to-maturity securities, Total: Number of Securities | security	4	1
Held-to-maturity securities, Total: Fair Value	$ 4,916	$ 449
Held-to-maturity securities, Total: Unrealized Losses	$ 83	$ 1
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	3	8
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 1,835	$ 5,336
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 3	$ 15
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	0
Held-to-maturity securities, Total: Number of Securities | security	3	8
Held-to-maturity securities, Total: Fair Value	$ 1,835	$ 5,336
Held-to-maturity securities, Total: Unrealized Losses	$ 3	$ 15
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	13	2
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 6,152	$ 801
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 53	$ 6
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	0
Held-to-maturity securities, Total: Number of Securities | security	13	2
Held-to-maturity securities, Total: Fair Value	$ 6,152	$ 801
Held-to-maturity securities, Total: Unrealized Losses	$ 53	$ 6

Investment Securities (Schedu_2

Investment Securities (Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Debt Securities) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Securities Financing Transactions Disclosures [Abstract]
Realized gains	$ 137
Realized losses	(5)
Net gains	$ 132

Investment Securities (Investme

Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost, Due in 1 year or less	$ 2,250
Available-for-sale Securities, Amortized Cost, Due in 1 year or less	1,000
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Total	3,250
Available-for-sale debt securities, Amortized Cost	3,252	$ 5,752
Available-for-sale Securities, Fair Value, Due after 1 year but within 5 years	2,250
Available-for-sale Securities, Fair Value, Due after 5 years but within 10 years	998
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value, Total	3,248
Available-for-sale debt securities, Fair Value	3,250	5,748
Held-to-maturity, Due in 1 year or less, Amortized Cost	3,465
Held-to-maturity, Due after 1 year through 5 years, Amortized Cost	38,808
Held-to-maturity, Due after 5 years through 10 years, Amortized Cost	52,560
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	94,833
Held-to-maturity debt securities, Amortized Cost	130,560	128,292
Held-to-maturity, Due in 1 year or less, Fair Value	3,511
Held-to-maturity, Due after 1 year through 5, Fair Value	40,397
Held-to-maturity, Due after 5 years through 10 years, Fair Value	53,021
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value	96,929
Held-to-maturity, Fair Value	133,519	$ 132,794
Mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities without a Single Maturity Date, Amortized Cost	2
Available-for-sale securities without a Single Maturity Date, Fair Value	2
Held-to-maturity without Single Maturity Date, Amortized Cost	35,727
Held-to-maturity without Single Maturity Date, Fair Value	$ 36,590

Loans and Allowance for Loan _3

Loans and Allowance for Loan and Lease Losses (Classes Of The Loan Portfolio Summarized By The Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	$ 2,646,236	$ 2,384,041	$ 1,798,149
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	75,423	74,224	64,610
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,614,277	2,351,764
Pass [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	73,087	71,856
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	19,231	11,692
Special Mention [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2	3
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	12,728	20,585
Substandard [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,334	2,365
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	964,045	752,354	351,339
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,135,660	1,099,656	939,995
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	264,945	248,913	205,248
Commercial Portfolio [Member] | Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	951,489	739,306
Commercial Portfolio [Member] | Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,119,845	1,084,123
Commercial Portfolio [Member] | Pass [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	264,915	248,882
Commercial Portfolio [Member] | Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	10,272	9,928
Commercial Portfolio [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	8,905	1,708
Commercial Portfolio [Member] | Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,284	3,120
Commercial Portfolio [Member] | Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	6,910	13,825
Commercial Portfolio [Member] | Substandard [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	30	31
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	197,788	201,841	230,047
Residential Portfolio [Member] | Pass [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	196,566	200,544
Residential Portfolio [Member] | Special Mention [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	52	53
Residential Portfolio [Member] | Substandard [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,170	1,244
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	8,375	7,053	$ 6,910
Consumer Portfolio [Member] | Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	$ 8,375	$ 7,053

Loans and Allowance for Loan _4

Loans and Allowance for Loan and Lease Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	$ 2,334	$ 2,365
Impaired Loans with No Allowance: Unpaid Principal Balance	2,337	2,395
Impaired Loans: Total Recorded Investment	2,334	2,365
Impaired Loans: Total Unpaid Principal Balance	2,349	2,408
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Unpaid Principal Balance	12	13
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	143	899
Impaired Loans with No Allowance: Unpaid Principal Balance	174	931
Impaired Loans with Allowance: Recorded Investment	225	553
Impaired Loans with Allowance: Unpaid Principal Balance	253	574
Impaired Loans with Allowance: Related Allowance	68	533
Impaired Loans: Total Recorded Investment	368	1,452
Impaired Loans: Total Unpaid Principal Balance	427	1,505
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	595	8,215
Impaired Loans with No Allowance: Unpaid Principal Balance	973	8,574
Impaired Loans with Allowance: Recorded Investment	874	887
Impaired Loans with Allowance: Unpaid Principal Balance	926	994
Impaired Loans with Allowance: Related Allowance	263	274
Impaired Loans: Total Recorded Investment	2,877	10,521
Impaired Loans: Total Unpaid Principal Balance	3,589	11,261
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	1,408	1,419
Impaired Loans with No Allowance: Unpaid Principal Balance	1,690	1,693
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	30	31
Impaired Loans with No Allowance: Unpaid Principal Balance	34	34
Impaired Loans: Total Recorded Investment	30	31
Impaired Loans: Total Unpaid Principal Balance	34	34
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	758	818
Impaired Loans with No Allowance: Unpaid Principal Balance	786	842
Impaired Loans: Total Recorded Investment	1,067	1,141
Impaired Loans: Total Unpaid Principal Balance	1,343	1,410
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	309	323
Impaired Loans with No Allowance: Unpaid Principal Balance	$ 557	$ 568

Loans and Allowance for Loan _5

Loans and Allowance for Loan and Lease Losses (Average Recorded Investment Of Impaired Loans And Related Interest Income By Loan Portfolio Class) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	$ 2,350	$ 24
Impaired Financing Receivable, Average Recorded Investment, Total	2,350	25
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment		1
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	753	890
Impaired Loans with Allowance: Average Recorded Investment	157	4
Impaired Financing Receivable, Average Recorded Investment, Total	910	896
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment		2
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	31	40
Impaired Financing Receivable, Average Recorded Investment, Total	31	40
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	4,405	7,430
Impaired Loans with Allowance: Average Recorded Investment	880	550
Impaired Financing Receivable, Average Recorded Investment, Total	6,699	9,400
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	1,414	1,420
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	787	782
Impaired Loans with No Allowance: Interest Income Recognized	8	6
Impaired Financing Receivable, Average Recorded Investment, Total	1,104	1,156
Impaired Financing Receivable, Interest Income Recognized, Total	8	6
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	$ 317	$ 374

Loans and Allowance for Loan _6

Loans and Allowance for Loan and Lease Losses (Non-accrual Loans by Classes of the Loan Portfolio Including Loans Acquired With Credit Deterioration) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 6,220	$ 15,047
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	2,334	2,365
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	368	1,452
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	2,877	10,520
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	30	31
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 611	$ 679

Loans and Allowance for Loan _7

Loans and Allowance for Loan and Lease Losses (Loan Portfolio Summarized By The Past Due Status) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 7,330	$ 15,952
Financing Receivable, Recorded Investment, Current	2,638,906	2,368,089
Total Loans	2,646,236	2,384,041	$ 1,798,149
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,717	1,742	1,792
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,446	1,667
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	592	1,045
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,292	13,240
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	75,423	74,224	64,610
Home Equity [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,621	2,436
Financing Receivable, Recorded Investment, Current	72,802	71,788
Total Loans	75,423	74,224
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans			1
Home Equity [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	309	71
Home Equity [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		22
Home Equity [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,312	2,343
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	964,045	752,354	351,339
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,168	2,759
Financing Receivable, Recorded Investment, Current	962,877	749,595
Total Loans	964,045	752,354
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	800	365
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	32	1,017
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	336	1,377
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,135,660	1,099,656	939,995
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,519	8,764
Financing Receivable, Recorded Investment, Current	1,132,733	1,089,473
Total Loans	1,134,252	1,098,237
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,395	1,411
Financing Receivable, Recorded Investment, Current	13	8
Total Loans	1,408	1,419	1,423
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	101	1,096
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		9
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	555
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	863	7,668
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,395	1,402
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	264,945	248,913	205,248
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	264,945	248,913
Total Loans	264,945	248,913
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	8,375	7,053	6,910
Consumer Portfolio [Member] | Consumer [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	6
Financing Receivable, Recorded Investment, Current	8,371	7,047
Total Loans	8,375	7,053
Consumer Portfolio [Member] | Consumer [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	6
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	197,788	201,841	230,047
Residential Portfolio [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	464	408
Financing Receivable, Recorded Investment, Current	197,015	201,110
Total Loans	197,479	201,518
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	159	168
Financing Receivable, Recorded Investment, Current	150	155
Total Loans	309	323	$ 368
Residential Portfolio [Member] | Residential Mortgage [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	236	126
Residential Portfolio [Member] | Residential Mortgage [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1
Residential Portfolio [Member] | Residential Mortgage [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	227	282
Residential Portfolio [Member] | Residential Mortgage [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 159	$ 168

Loans and Allowance for Loan _8

Loans and Allowance for Loan and Lease Losses (Narrative) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2021USD ($)Loan	Dec. 31, 2020USD ($)Loan	Mar. 31, 2020USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	$ 13,591,000	$ 13,382,000
Loans outstanding, net	2,632,645,000	2,370,659,000
Financing receivable, modifications, recorded investment	$ 1,448,000	$ 1,480,000
Number of troubled debt restructured loans | Loan	0	0
Loans and leases receivable, gross, carrying amount	$ 2,646,236,000	$ 2,384,041,000	$ 1,798,149,000
CARES Act [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, gross, carrying amount	$ 5,131,000	$ 11,681,000
CARES Act [Member] | Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Qualifying deferment status percentage of loan portfolio	1.00%	1.00%
Nonaccruing [Member] | Seven Loans with Five Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	$ 991,000	$ 1,017,000
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	501,000	510,000
Loans and leases receivable, gross, carrying amount	197,788,000	201,841,000	$ 230,047,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Accruing | Three Unrelated Borrowers [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	457,000	463,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	44,000	47,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] | Seven Loans with Five Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		1,017,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] | One Large Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		535,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] | Four Loans With Two Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		398,000
Commercial Real Estate [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		31,000
PPP Loans [Member] | Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	0
Loans outstanding, net	590,035,000	388,313,000
Commercial Real Estate [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	911,000
Commercial Real Estate - Construction [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	30,000
Commercial and Industrial [Member] | Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		$ 6,000
Commercial and Industrial [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	$ 6,000

Loans and Allowance for Loan _9

Loans and Allowance for Loan and Lease Losses (Allowance And Recorded Investment In Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	$ 13,382	$ 9,515
Charge-offs	(865)	(58)
Recoveries	74	7
Provisions (credits)	1,000	550
Allowance for Loan Losses, Ending balance	13,591	10,014
Allowance for loan losses: Ending balance: individually evaluated for impairment	331	193	$ 807
Allowance for loan losses: Ending balance: collectively evaluated for impairment	13,260	9,821	12,575
Loans receivables, Ending balance	2,646,236	1,798,149	2,384,041
Loans receivables: Ending balance: individually evaluated for impairment	4,959	9,357	13,768
Loans Receivable: Ending balance: collectively evaluated for impairment	2,639,560	1,787,000	2,368,531
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	1,717	1,792	1,742
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	507	442
Provisions (credits)	21	6
Allowance for Loan Losses, Ending balance	528	448
Allowance for loan losses: Ending balance: collectively evaluated for impairment	528	448	507
Loans receivables, Ending balance	75,423	64,610	74,224
Loans receivables: Ending balance: individually evaluated for impairment	2,334	24	2,365
Loans Receivable: Ending balance: collectively evaluated for impairment	73,089	64,585	71,859
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance		1
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	3,066	2,341
Charge-offs	(859)	(43)
Recoveries	1	1
Provisions (credits)	780	128
Allowance for Loan Losses, Ending balance	2,988	2,427
Allowance for loan losses: Ending balance: individually evaluated for impairment	68	3	533
Allowance for loan losses: Ending balance: collectively evaluated for impairment	2,920	2,424	2,533
Loans receivables, Ending balance	964,045	351,339	752,354
Loans receivables: Ending balance: individually evaluated for impairment	368	897	1,452
Loans Receivable: Ending balance: collectively evaluated for impairment	963,677	350,442	750,902
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	8,655	6,259
Recoveries	56	1
Provisions (credits)	233	370
Allowance for Loan Losses, Ending balance	8,944	6,630
Allowance for loan losses: Ending balance: individually evaluated for impairment	263	190	274
Allowance for loan losses: Ending balance: collectively evaluated for impairment	8,681	6,440	8,381
Loans receivables, Ending balance	1,135,660	939,995	1,099,656
Loans receivables: Ending balance: individually evaluated for impairment	1,469	7,649	9,102
Loans Receivable: Ending balance: collectively evaluated for impairment	1,132,783	930,923	1,089,135
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	1,408	1,423	1,419
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	134	51
Provisions (credits)	(12)	6
Allowance for Loan Losses, Ending balance	122	57
Allowance for loan losses: Ending balance: collectively evaluated for impairment	122	57	134
Loans receivables, Ending balance	264,945	205,248	248,913
Loans receivables: Ending balance: individually evaluated for impairment	30	39	31
Loans Receivable: Ending balance: collectively evaluated for impairment	264,915	205,209	248,882
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	429	417
Charge-offs	(3)
Recoveries	9	3
Provisions (credits)	3	16
Allowance for Loan Losses, Ending balance	438	436
Allowance for loan losses: Ending balance: collectively evaluated for impairment	438	436	429
Loans receivables, Ending balance	197,788	230,047	201,841
Loans receivables: Ending balance: individually evaluated for impairment	758	748	818
Loans Receivable: Ending balance: collectively evaluated for impairment	196,721	228,931	200,700
Residential Portfolio [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	309	368	323
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	1	2
Charge-offs	(3)	(15)
Recoveries	8	2
Provisions (credits)	(5)	13
Allowance for Loan Losses, Ending balance	1	2
Allowance for loan losses: Ending balance: collectively evaluated for impairment	1	2	1
Loans receivables, Ending balance	8,375	6,910	7,053
Loans Receivable: Ending balance: collectively evaluated for impairment	8,375	6,910	7,053
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	590	3
Provisions (credits)	(20)	11
Allowance for Loan Losses, Ending balance	570	14
Allowance for loan losses: Ending balance: collectively evaluated for impairment	$ 570	$ 14	$ 590

Loans and Allowance for Loan_10

Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,582,000	$ 2,582,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,480,000	2,480,000
Financing Receivable, Modifications, Recorded Investment	1,448,000	1,480,000
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	8,000	8,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,000	8,000
Financing Receivable, Modifications, Recorded Investment	6,000	6,000
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	1,806,000	1,806,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,707,000	1,707,000
Financing Receivable, Modifications, Recorded Investment	911,000	933,000
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	40,000	40,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	40,000	40,000
Financing Receivable, Modifications, Recorded Investment	30,000	31,000
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	728,000	728,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	725,000	725,000
Financing Receivable, Modifications, Recorded Investment	$ 501,000	510,000
Residential Portfolio [Member] | Commercial and Industrial [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 6,000

Loans and Allowance for Loan_11

Loans and Allowance for Loan and Lease Losses (Schedule of Accretion of Purchased Impaired Loan) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Accretable yield, beginning balance	$ 40	$ 89
Accretable yield amortized to interest income	0	(17)
Accretable yield, ending balance	$ 40	$ 72

Leases - Addititonal Informatio

Leases - Addititonal Information (Details)	3 Months Ended
	Mar. 31, 2021USD ($)
Lease Cost [Abstract]
Sub lease agreement additional extended period	1 year
Sale and leaseback transactions	$ 0
Leveraged leases	$ 0

Leases - Summary of Operating a

Leases - Summary of Operating and Finance Lease Right-of-use Assets and Related Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
Right of use asset	$ 10,791	$ 10,157
Lease liability	$ 11,828	$ 11,200
Weighted average remaining lease term (in years)	7 years 9 months 21 days	8 years 18 days
Weighted average discount rate	3.15%	3.30%
Finance Lease
Right of use asset	$ 3,222	$ 3,267
Lease liability	$ 3,446	$ 3,467
Weighted average remaining lease term (in years)	17 years 11 months 1 day	18 years 2 months 1 day
Weighted average discount rate	3.81%	3.81%

Leases - Summary of Lease Costs

Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Finance lease cost:
Amortization of right-of-use asset	$ 45	$ 45
Interest expense on lease liability	33	34
Total finance lease cost	78	79
Operating lease cost	516	528
Short-term and equipment lease cost	10	9
Sublease income	(9)	(6)
Total lease costs	$ 595	$ 610

Leases - Summary of Cash Paid f

Leases - Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 33	$ 34
Operating cash flows from operating leases	522	544
Financing cash flows from finance leases	$ 21	$ 21

Leases - Summary of Maturity An

Leases - Summary of Maturity Analysis of Operating and Finance Lease Liabilities and Reconciliation of Undiscounted Cash Flows (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating lease payments due:
Within one year	$ 1,557
After one but within two years	2,061
After two but within three years	1,815
After three but within four years	1,760
After four but within five years	1,373
After five years	4,810
Total undiscounted cash flows	13,376
Discount on cash flows	(1,548)
Total lease liability	11,828	$ 11,200
Finance lease payments due:
Within one year	163
After one but within two years	217
After two but within three years	217
After three but within four years	252
After four but within five years	259
After five years	3,733
Total undiscounted cash flows	4,841
Discount on cash flows	(1,395)
Total lease liability	$ 3,446	$ 3,467

Loan-Level Interest Rate Swap_2

Loan-Level Interest Rate Swaps (Notional Amount, and Collateral Posted Related to Loan-level Interest Rate Swaps) (Details) - Commercial Loan [Member] - Not Designated as Hedging [Member] - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Other Assets [Member]
Derivative [Line Items]
Interest Rate Swap Contracts - Commercial Loans, Fair Value (a)	[1]	$ 1,185	$ 489
Interest Rate Swaps {Member]
Derivative [Line Items]
Interest Rate Swap Contracts - Commercial Loans, Notional Amount		48,864	22,331
Interest Rate Swap Contracts - Commercial Loans, Cash Collateral Posted (b)	[2]	$ 500	$ 500
[1]	Included in other liabilities as of March 31, 2021 and other assets as of December 31, 2020, respectively, on the Consolidated Balance Sheets
[2]	Included in cash and due from banks on the Consolidated Balance Sheet

Loan-Level Interest Rate Swap_3

Loan-Level Interest Rate Swaps (Schedule of Gross Amounts of Commercial Loan Swap Derivatives, Amounts Offset and Carrying Values) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Gross amounts not offset:
Cash collateral	$ 500	$ 500
Net Amounts	500	500
Interest Rate Swaps {Member] | Commercial Loan [Member]
Derivative [Line Items]
Gross amounts recognized	1,185	489
Gross amounts offset	$ 1,185	$ 489

Fair Value Measurement (Assets

Fair Value Measurement (Assets Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 3,250	$ 5,748
Available-for-sale securities	3,758	6,752
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	508	515
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,250	6,237
Mortgage-backed U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	2	2
Mortgage-backed U.S. Government Agencies [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	2
Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	3,248	5,746
Corporate debt securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	3,248	5,746
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity securities	508	515
Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity securities	$ 508	515
Interest Rate Swap Agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale interest rate swap agreements		489
Interest Rate Swap Agreements [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale interest rate swap agreements		489
U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		2
U.S. Government Agencies [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		$ 2

Fair Value Measurement (Fair Va

Fair Value Measurement (Fair Value Measurements, Nonrecurring) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 897	$ 800
Foreclosed Assets Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	77	77
Level 3 [Member] | Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	897	800
Level 3 [Member] | Foreclosed Assets Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 77	$ 77

Fair Value Measurement (Fair _2

Fair Value Measurement (Fair Value Inputs, Assets, Quantitative Information) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Valuation Techniques	Appraisal of collateral	Appraisal of collateral
Fair Value Disclosure, Unobservable Input Range	Appraisal adjustments	Appraisal adjustments
Impaired Loan [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 897	$ 800
Impaired Loan [Member] | Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 897	$ 800
Foreclosed Assets Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Valuation Techniques	Appraisal of collateral	Appraisal of collateral
Fair Value Disclosure, Unobservable Input Range	Appraisal adjustments	Appraisal adjustments
Foreclosed Assets Held for Sale [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 77	$ 77
Foreclosed Assets Held for Sale [Member] | Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 77	$ 77
Minimum [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Impaired Loan [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	24.00%	25.00%
Minimum [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Foreclosed Assets Held for Sale [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	27.00%	27.00%
Maximum [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Impaired Loan [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	100.00%	100.00%
Maximum [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Foreclosed Assets Held for Sale [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	27.00%	27.00%
Weighted Average [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Impaired Loan [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	39.00%	40.00%
Weighted Average [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Foreclosed Assets Held for Sale [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	27.00%	27.00%

Fair Value Measurement (Fair _3

Fair Value Measurement (Fair Value, by Balance Sheet Grouping) (Details) - USD ($)		Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale investment securities		$ 3,250,000	$ 5,748,000
Held-to-maturity investment securities		133,519,000	132,794,000
Equity securities		508,000	515,000
Net loans and leases		251,644,000	276,701,000
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		427,371,000	303,724,000
Available-for-sale investment securities		3,250,000	5,748,000
Held-to-maturity investment securities		130,560,000	128,292,000
Equity securities		508,000	515,000
Loans held for sale		25,842,000	25,506,000
Net loans and leases		2,632,645,000	2,370,659,000
Restricted investment in bank stocks		6,860,000	7,594,000
Accrued interest receivable		11,855,000	3,619,000
Net Amounts Presented in the Consolidated Balance Sheets			489,000
Deposits		2,666,827,000	2,474,580,000
Short-term borrowings		307,753,000	125,617,000
Long-term debt	[1]	71,584,000	71,648,000
Subordinated debt		44,586,000	44,580,000
Accrued interest payable		1,902,000	2,007,000
Interest rate swap agreements		1,185,000
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		427,371,000	303,724,000
Available-for-sale investment securities		3,250,000	5,748,000
Held-to-maturity investment securities		133,519,000	132,794,000
Equity securities		508,000	515,000
Loans held for sale		26,434,000	26,262,000
Net loans and leases		2,716,155,000	2,444,105,000
Restricted investment in bank stocks		6,860,000	7,594,000
Accrued interest receivable		11,855,000	3,619,000
Net Amounts Presented in the Consolidated Balance Sheets			489,000
Deposits		2,670,017,000	2,496,799,000
Short-term borrowings		307,753,000	125,617,000
Long-term debt	[1]	65,776,000	70,498,000
Subordinated debt		46,784,000	43,098,000
Accrued interest payable		1,902,000	$ 2,007,000
Interest rate swap agreements		$ 1,185,000
[1]	Long-term debt excludes finance lease obligations.

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($)		Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		$ 133,519,000	$ 132,794,000
Net loans and leases		251,644,000	276,701,000
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		133,519,000	132,794,000
Loans held for sale		26,434,000	26,262,000
Deposits		2,670,017,000	2,496,799,000
Long-term debt	[1]	65,776,000	70,498,000
Subordinated debt		46,784,000	43,098,000
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases		2,716,155,000	2,444,105,000
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		130,560,000	128,292,000
Loans held for sale		25,842,000	25,506,000
Net loans and leases		2,632,645,000	2,370,659,000
Deposits		2,666,827,000	2,474,580,000
Long-term debt	[1]	71,584,000	71,648,000
Subordinated debt		44,586,000	44,580,000
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		133,519,000	132,794,000
Loans held for sale		26,434,000	26,262,000
Net loans and leases		2,716,155,000	2,444,105,000
Deposits		2,670,017,000	2,496,799,000
Long-term debt	[1]	65,776,000	70,498,000
Subordinated debt		$ 46,784,000	$ 43,098,000
[1]	Long-term debt excludes finance lease obligations.

Guarantees, Commitments, and _2

Guarantees, Commitments, and Contingencies (Narrative) (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
PPP Loans [Member] | Small Business Administration [Member]
Commitments, Contingencies and Guarantees [Line Items]
Nonrefundable loan processing fees received	$ 15,882,000	$ 15,882,000	$ 20,883,000	$ 36,765,000
Financial Standby Letters of Credit [Member]
Commitments, Contingencies and Guarantees [Line Items]
Commitments to extend credit		$ 43,997,000	$ 39,468,000

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Maturity of federal funds purchased from correspondent banks	one business day
Real estate secured loans	$ 1,302,960,000
Current borrowing available	571,837,000
Maximum borrowing capacity	908,918,000
Short term borrowings	307,753,000		$ 125,617,000
Long-term debt outstanding	75,030,000		75,115,000
FHLB prepayment		$ 9,500,000
FHLB prepayment penalties		$ 63,000
FHLB [Member]
Debt Instrument [Line Items]
Letter of credit outstanding, amount	263,800,000		288,950,000
Paycheck Protection Program Liquidity Facility [Member]
Debt Instrument [Line Items]
Short term borrowings	$ 307,753,000		125,617,000
Short-term borrowings, term	five years
Short-term borrowings, interest Rate	0.35%
Other Correspondent Banks [Member]
Debt Instrument [Line Items]
Outstanding drawings	$ 0		0
Line of credit facility, remaining borrowing capacity	35,000,000
Short term borrowings	0		0
FHLB Short-Term Borrowings [Member]
Debt Instrument [Line Items]
Outstanding drawings	$ 0		$ 0

Debt (Long-term Debt Outstandin

Debt (Long-term Debt Outstanding by Due Date) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total FHLB fixed rate instruments	$ 71,584	$ 71,648
Lease obligations included in long-term debt	3,446	3,467
Total long-term debt	75,030	75,115
Due in April 2022 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 70,000	$ 70,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	0.86343%	0.86343%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2022-04	2022-04
Due in August 2026 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 1,544	$ 1,606
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	4.80%	4.80%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2026-08	2026-08
Due in February 2027 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 40	$ 42
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	6.71%	6.71%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2027-02	2027-02

Subordinated Debt (Narrative) (

Subordinated Debt (Narrative) (Details) - Subordinated Debt [Member] - USD ($)	Dec. 22, 2020	Dec. 18, 2020	Mar. 20, 2020	Dec. 19, 2017	Dec. 09, 2015	Mar. 31, 2021	Dec. 31, 2020	Jul. 31, 2018
Subordinated Notes Due December 2030 [Member]
Subordinated debt issuance	$ 12,150,000
Debt instrument, interest rate, effective percentage	4.50%
Debt Instrument, Description of Variable Rate Basis						The December 2020 Notes bear interest at a rate of 4.5% per year for the first five years and then float at the Wall Street Journal’s Prime Rate, provided that the interest rate applicable to the outstanding principal balance during the period the December 2020 Notes are floating will at no time be less than 4.5%.
Debt instrument, payment terms						Interest is payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year, beginning on March 31, 2021.
Debt instrument, maturity date						Dec. 31, 2030
Debt instrument, redemption, description						The December 2020 Notes bear interest at a rate of 4.5% per year for the first five years and then float at the Wall Street Journal’s Prime Rate, provided that the interest rate applicable to the outstanding principal balance during the period the December 2020 Notes are floating will at no time be less than 4.5%. Interest is payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year, beginning on March 31, 2021.  The December 2020 Notes will mature on December 31, 2030 and are redeemable, in whole or in part, without premium or penalty, on any interest payment date on or after December 31, 2025 and prior to December 31, 2030, subject to any required regulatory approvals.  Additionally, if (i) all or any portion of the December 2020 Notes cease to be deemed Tier 2 Capital, (ii) interest on the December 2020 Notes fails to be deductible for United States federal income tax purposes or (iii) Mid Penn will be considered an “investment company,” Mid Penn may redeem the December 2020 Notes, in whole but not in part, by giving 10 days’ notice to the holders of the December 2020 Notes.  In the event of a redemption described in the previous sentence, Mid Penn will redeem the December 2020 Notes at 100% of the principal amount of the December 2020 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption.
Debt instrument, interest rate, effective percentage	4.50%
Notes payable to related parties						$ 750,000	$ 750,000
Subordinated Notes Due March 2030 [Member]
Subordinated debt issuance			$ 15,000,000
Debt instrument, interest rate, effective percentage			4.00%
Debt Instrument, Description of Variable Rate Basis						The March 2020 Notes bear interest at a rate of 4.0% per year for the first five years and then float at the Wall Street Journal’s Prime Rate, provided that the interest rate applicable to the outstanding principal balance during the period the March 2020 Notes are floating will at no time be less than 4.25%.
Debt instrument, payment terms						Interest is payable semi-annually in arrears on June 30 and December 30 of each year, beginning on June 30, 2020, for the first five years after issuance and will be payable quarterly in arrears thereafter on March 30, June 30, September 30 and December 30.
Debt instrument, maturity date						Mar. 30, 2030
Debt instrument, redemption, description						The March 2020 Notes bear interest at a rate of 4.0% per year for the first five years and then float at the Wall Street Journal’s Prime Rate, provided that the interest rate applicable to the outstanding principal balance during the period the March 2020 Notes are floating will at no time be less than 4.25%.  Interest is payable semi-annually in arrears on June 30 and December 30 of each year, beginning on June 30, 2020, for the first five years after issuance and will be payable quarterly in arrears thereafter on March 30, June 30, September 30 and December 30.  The March 2020 Notes will mature on March 30, 2030 and are redeemable in whole or in part, without premium or penalty, at any time on or after March 30, 2025 and prior to March 30, 2030.  Additionally, if all or any portion of the March 2020 Notes cease to be deemed Tier 2 Capital, Mid Penn may redeem, on any interest payment date, all or part of the 2020 Notes.  In the event of a redemption described in the previous sentence, Mid Penn will redeem the March 2020 Notes at 100% of the principal amount of the March 2020 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption.
Debt instrument, interest rate, effective percentage			4.25%
Notes payable to related parties						$ 1,700,000	1,700,000
Subordinated Notes Due 2028 [Member]
Subordinated debt issuance				$ 10,000,000
Debt instrument, interest rate, effective percentage				5.25%
Debt Instrument, Description of Variable Rate Basis						The 2017 Notes bear interest at a rate of 5.25% per year for the first five years and then float at the Wall Street Journal’s Prime Rate plus 0.50%, provided that the interest rate applicable to the outstanding principal balance will at no time be less than 5.0%.
Debt instrument, payment terms						Interest is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2018, for the first five years after issuance and will be payable quarterly in arrears thereafter on January 15, April 15, July 15, and October 15.
Debt instrument, maturity date						Jan. 1, 2028
Debt instrument, redemption, description						The 2017 Notes bear interest at a rate of 5.25% per year for the first five years and then float at the Wall Street Journal’s Prime Rate plus 0.50%, provided that the interest rate applicable to the outstanding principal balance will at no time be less than 5.0%. Interest is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2018, for the first five years after issuance and will be payable quarterly in arrears thereafter on January 15, April 15, July 15, and October 15. The 2017 Notes will mature on January 1, 2028 and are redeemable in whole or in part, without premium or penalty, at any time on or after December 21, 2022, and prior to January 1, 2028. Additionally, Mid Penn may redeem the 2017 Notes in whole at any time, or in part from time to time, upon at least 30 days’ notice if: (i) a change or prospective change in law occurs that could prevent Mid Penn from deducting interest payable on the 2017 Notes for U.S. federal income tax purposes; (ii) an event occurs that precludes the 2017 Notes from being recognized as Tier 2 capital for regulatory capital purposes; or (iii) Mid Penn becomes required to register as an investment company under the Investment Company Act of 1940, as amended. In the event of a redemption described in the previous sentence, Mid Penn will redeem the 2017 Notes at 100% of the principal amount of the 2017 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption.
Notes payable to related parties						$ 1,450,000	1,450,000
Unamortized debt issuance cost						$ 64,000	70,000
Subordinated Notes Due 2028 [Member] | WSJ Prime Rate [Member]
Debt instrument, basis spread on variable rate				0.50%
Subordinated Notes Due 2028 [Member] | WSJ Prime Rate [Member] | Maximum [Member]
Debt instrument, interest rate, effective percentage				5.00%
Subordinated Notes Due 2025 [Member]
Subordinated debt issuance					$ 7,500,000
Debt instrument, interest rate, effective percentage					5.15%
Debt Instrument, Description of Variable Rate Basis						The 2015 Notes paid interest at a rate of 5.15% per year for the first five years outstanding, including the three months ended March 31, 2020. Beginning January 1, 2021, the 2015 Notes bear interest at a floating rate based on the Wall Street Journal’s Prime Rate plus 0.50%, provided that the interest rate applicable to the outstanding principal balance will at no time be less than 4.0%.
Debt instrument, payment terms						Interest is payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, beginning on January 1, 2016.
Debt instrument, maturity date						Dec. 9, 2025
Debt instrument, redemption, description						The 2015 Notes paid interest at a rate of 5.15% per year for the first five years outstanding, including the three months ended March 31, 2020. Beginning January 1, 2021, the 2015 Notes bear interest at a floating rate based on the Wall Street Journal’s Prime Rate plus 0.50%, provided that the interest rate applicable to the outstanding principal balance will at no time be less than 4.0%.  Interest is payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, beginning on January 1, 2016. The 2015 Notes will mature on December 9, 2025 and are redeemable in whole or in part, without premium or penalty, at any time on or after December 9, 2020, and prior to December 9, 2025.  Additionally, Mid Penn may redeem the 2015 Notes in whole at any time, or in part from time to time, upon at least 30 days’ notice if:  (i) a change or prospective change in law occurs that could prevent Mid Penn from deducting interest payable on the 2015 Notes for U.S. federal income tax purposes; (ii) an event occurs that precludes the 2015 Notes from being recognized as Tier 2 capital for regulatory capital purposes; or (iii) Mid Penn becomes required to register as an investment company under the Investment Company Act of 1940, as amended, in each case at 100% of the principal amount of the 2015 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption.
Notes payable to related parties						$ 1,930,000	1,930,000
Unamortized debt issuance cost						$ 64,000	$ 70,000
Debt instrument, redemption period, end date		Dec. 18, 2020
Debt instrument redemption amount		$ 9,500,000
Redemption pricing fees recognized		$ 143,000
Subordinated Notes Due 2025 [Member] | First Priority Financial Corp. [Member]
Subordinated debt acquired								$ 9,500,000
Subordinated Notes Due 2025 [Member] | WSJ Prime Rate [Member]
Debt instrument, basis spread on variable rate					0.50%
Subordinated Notes Due 2025 [Member] | WSJ Prime Rate [Member] | Maximum [Member]
Debt instrument, interest rate, effective percentage					4.00%

Defined Benefit Plans (Narrativ

Defined Benefit Plans (Narrative) (Details)	3 Months Ended
	Mar. 31, 2021USD ($)
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]
Contributions by employer to defined benefit plan	$ 300,000

Defined Benefit Plans (Net Peri

Defined Benefit Plans (Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 33	$ 20
Interest cost	40	45
Expected return on plan assets	(57)	(68)
Settlement gain	(49)
Net periodic benefit income	(33)	(3)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1
Interest cost	2
Accretion of prior service cost	(5)	(5)
Net periodic benefit income	$ (2)	$ (5)

Common Stock (Details)

Common Stock (Details) - USD ($)	May 04, 2021	Apr. 29, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2021
Employee [Member] | Minimum [Member]
Class of Stock [Line Items]
Restricted shares, vesting period			1 year
Employee [Member] | Maximum [Member]
Class of Stock [Line Items]
Restricted shares, vesting period			4 years
Director [Member]
Class of Stock [Line Items]
Restricted shares, vesting period			12 months
Dividend Reinvestment Plan [Member]
Class of Stock [Line Items]
Shares authorized per plan			330,750			330,750
2014 Restricted Stock Plan [Member]
Class of Stock [Line Items]
Aggregate shares granted			200,000
Shares granted			85,914
Allocated share-based compensation expense			$ 132,000	$ 96,000
Shares forfeited and available for reissuance			0			2,446
Restricted shares vested during period			42,041
Granted shares unvested			41,427			41,427
Shares forfeited				100
Subsequent Event [Member] | Underwritten Public Offering [Member]
Class of Stock [Line Items]
Common stock offering		$ 65,000,000
Underwriters option to purchase additional shares of common stock, period		30 days
Percentage of underwriters option to purchase additional shares of common stock		15.00%
Underwriters option to purchase additional shares of common stock	390,000	390,000
Number of shares issued	2,990,000	2,600,000
Common stock, price per share	$ 25	$ 25
Number of shares issued upon exercise of underwriters option to purchase additional shares	390,000
Treasury Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount			$ 15,000,000			$ 15,000,000
Percentage of issued shares based on closing stock price			6.60%			6.60%
Stock repurchase program expiration date			Mar. 19, 2022
Stock repurchased during period, shares			98,452	0	92,652
Stock repurchased at average price per share			$ 19.53		$ 19.37	$ 19.53

COVID-19 Pandemic Implications

COVID-19 Pandemic Implications (Narrative) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2021
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount	$ 2,646,236,000	$ 2,384,041,000	$ 2,646,236,000	$ 1,798,149,000	$ 2,384,041,000	$ 2,646,236,000
CARES Act [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount	$ 5,131,000	$ 11,681,000	$ 5,131,000		$ 11,681,000	$ 5,131,000
Maximum [Member] | CARES Act [Member]
Unusual Risk Or Uncertainty [Line Items]
Qualifying deferment status percentage of loan portfolio	1.00%	1.00%	1.00%		1.00%	1.00%
PPP Loans [Member] | Small Business Administration [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan guarantee description			The PPP loans, which are 100 percent guaranteed by the SBA, have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term.
Nonrefundable loan processing fees received	$ 15,882,000		$ 15,882,000		$ 20,883,000	$ 36,765,000
Loan processing fees			5,047,000	0
Deferred loan processing fees not yet realized	$ 18,581,000	$ 7,746,000	$ 14,988,000		$ 3,593,000
Amortization of loan processing fees description			will be amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of each respective loan.
PPP Loans [Member] | Small Business Administration [Member] | Interest and Fees on Loans and Leases [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan processing fees			$ 5,047,000	$ 0
PPP Loans [Member] | Small Business Administration [Member] | Minimum [Member]
Unusual Risk Or Uncertainty [Line Items]
Percentage of processing fee per loan			1.00%
PPP Loans [Member] | Small Business Administration [Member] | Maximum [Member]
Unusual Risk Or Uncertainty [Line Items]
Percentage of processing fee per loan			5.00%

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Details) - Subsequent Event [Member] - USD ($)	May 04, 2021	Apr. 29, 2021	Apr. 28, 2021
Extension of Treasury Stock Repurchase Program [Member]
Subsequent Event [Line Items]
Stock repurchase program, authorized amount			$ 15,000,000
Stock repurchase program, remaining authorized amount			$ 13,077,000
Stock repurchase program expiration date			Mar. 19, 2020
Stock repurchase program extended expiration date			Mar. 19, 2022
Underwritten Public Offering [Member]
Subsequent Event [Line Items]
Common stock offering		$ 65,000,000
Number of shares issued	2,990,000	2,600,000
Common stock, price per share	$ 25	$ 25
Net proceeds received after underwriting discount and other estimated offering expenses	$ 70,200,000
Underwriters option to purchase additional shares of common stock, period		30 days
Percentage of underwriters option to purchase additional shares of common stock		15.00%
Underwriters option to purchase additional shares of common stock	390,000	390,000
Number of shares issued upon exercise of underwriters option to purchase additional shares	390,000
Aggregate gross proceeds of offering	$ 74,750,000