Mid Penn Bancorp (MPB) 10-Q 9 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 04, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
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		8,415,589
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 ($)	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 42,628,000	$ 25,746,000
Interest-bearing balances with other financial institutions	4,097,000	4,657,000
Federal funds sold	148,632,000	108,627,000
Total cash and cash equivalents	195,357,000	139,030,000
Investment securities available for sale, at fair value	8,337,000	37,009,000
Investment securities held to maturity, at amortized cost (fair value $144,708 and $137,476)	140,474,000	136,477,000
Equity securities available for sale, at fair value	1,522,000	507,000
Loans held for sale	30,938,000	8,422,000
Loans and leases, net of unearned interest	2,521,827,000	1,762,756,000
Less: Allowance for loan and lease losses	(12,170,000)	(9,515,000)
Net loans and leases	2,509,657,000	1,753,241,000
Bank premises and equipment, net	25,227,000	24,937,000
Operating lease right of use asset	10,173,000	11,442,000
Finance lease right of use asset	3,312,000	3,447,000
Cash surrender value of life insurance	17,108,000	16,881,000
Restricted investment in bank stocks	7,726,000	4,902,000
Accrued interest receivable	14,663,000	7,964,000
Deferred income taxes	4,819,000	2,810,000
Goodwill	62,840,000	62,840,000
Core deposit and other intangibles, net	4,791,000	5,758,000
Foreclosed assets held for sale	1,716,000	196,000
Other assets	14,275,000	15,312,000
Total Assets	3,052,935,000	2,231,175,000
LIABILITIES & SHAREHOLDERS’ EQUITY
Deposits: Noninterest-bearing demand	534,918,000	310,036,000
Deposits: Interest-bearing demand	630,160,000	458,451,000
Deposits: Money Market	679,024,000	488,748,000
Deposits: Savings	192,314,000	177,737,000
Deposits: Time	419,982,000	477,422,000
Total Deposits	2,456,398,000	1,912,394,000
Short-term borrowings	203,842,000
Long-term debt	75,199,000	32,903,000
Subordinated debt	41,972,000	27,070,000
Operating lease liability	11,212,000	12,544,000
Accrued interest payable	2,840,000	2,208,000
Federal income tax payable	1,734,000
Other liabilities	11,549,000	6,182,000
Total Liabilities	2,804,746,000	1,993,301,000
Shareholders' Equity:
Common stock, par value $1.00 per share; 20,000,000 shares authorized; Shares issued: 8,508,241 at Sept. 30, 2020 and 8,480,938 at Dec. 31, 2019; Shares outstanding: 8,415,589 at Sept. 30, 2020 and 8,480,938 at Dec. 31, 2019	8,508,000	8,481,000
Additional paid-in capital	178,659,000	178,159,000
Retained earnings	63,099,000	50,891,000
Accumulated other comprehensive (loss) income	(284,000)	343,000
Treasury stock, at cost; 92,652 shares at September 30, 2020	(1,793,000)
Total Shareholders’ Equity	248,189,000	237,874,000
Total Liabilities and Shareholders' Equity	$ 3,052,935,000	$ 2,231,175,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 144,708	$ 137,476
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Shares, Issued	8,508,241	8,480,938
Common Stock, Shares, Outstanding	8,415,589	8,480,938
Treasury Stock, Shares	92,652

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
INTEREST INCOME
Interest and fees on loans and leases	$ 25,136	$ 22,573	$ 72,501	$ 65,865
Interest and dividends on investment securities:
U.S. Treasury and government agencies	278	701	1,409	2,433
State and political subdivision obligations, tax-exempt	265	495	734	1,698
Other securities	406	215	882	597
Total interest and dividends on investment securities	949	1,411	3,025	4,728
Interest on other interest-bearing balances	3	23	36	80
Interest on federal funds sold	34	506	447	704
Total Interest Income	26,122	24,513	76,009	71,377
INTEREST EXPENSE
Interest on deposits	3,767	5,830	13,156	15,692
Interest on short-term borrowings	181	69	226	458
Interest on long-term and subordinated debt	766	847	2,208	2,384
Total Interest Expense	4,714	6,746	15,590	18,534
Net Interest Income	21,408	17,767	60,419	52,843
PROVISION FOR LOAN AND LEASE LOSSES	1,100	565	2,700	1,155
Net Interest Income After Provision for Loan and Lease Losses	20,308	17,202	57,719	51,688
NONINTEREST INCOME
Net gain on sales of SBA loans	173	275	435	710
Earnings from cash surrender value of life insurance	75	79	227	236
Net gain on sales of investment securities	150	46	393	70
Other income	565	347	1,447	1,096
Total Noninterest Income	5,302	3,003	11,858	7,926
NONINTEREST EXPENSE
Salaries and employee benefits	10,279	8,425	26,546	23,970
Occupancy expense, net	1,338	1,232	4,110	3,977
Equipment expense	713	671	2,148	1,956
Pennsylvania bank shares tax expense	409	359	869	740
FDIC Assessment	547	(131)	1,216	542
Legal and professional fees	336	311	1,037	1,204
Marketing and advertising expense	104	238	406	643
Software licensing and utilization	1,363	1,150	3,881	3,282
Telephone expense	134	150	405	465
Gain on sale or write-down of foreclosed assets, net	(8)	(36)	(8)	(22)
Intangible amortization	317	355	966	1,078
Other expenses	2,642	1,959	7,582	5,947
Total Noninterest Expense	18,174	14,683	49,158	43,782
INCOME BEFORE PROVISION FOR INCOME TAXES	7,436	5,522	20,419	15,832
Provision for income taxes	889	709	3,221	2,539
NET INCOME	$ 6,547	$ 4,813	$ 17,198	$ 13,293
PER COMMON SHARE DATA:
Basic and Diluted Earnings Per Common Share	$ 0.78	$ 0.57	$ 2.04	$ 1.57
Cash Dividends Paid	$ 0.18	$ 0.18	$ 0.59	$ 0.61
Income from Fiduciary and Wealth Management Activities [Member]
NONINTEREST INCOME
Non-interest Income	$ 462	$ 386	$ 1,267	$ 1,092
Service Charges on Deposits [Member]
NONINTEREST INCOME
Non-interest Income	140	230	460	665
Mortgage Banking Income [Member]
NONINTEREST INCOME
Non-interest Income	3,107	1,091	5,927	2,605
ATM Debit Card Interchange Income [Member]
NONINTEREST INCOME
Non-interest Income	535	434	1,426	1,148
Merchant Services Income [Member]
NONINTEREST INCOME
Non-interest Income	$ 95	$ 115	$ 276	$ 304

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 6,547	$ 4,813	$ 17,198	$ 13,293
Other comprehensive (loss) income:
Unrealized income arising during the period on available-for-sale securities, net of income taxes impact, respectively		90	190	419	3,188
Reclassification adjustment for net gain on sales of available-for-sale securities included in net income, net of income taxes impact, respectively	[1]	(118)	(37)	(310)	(56)
Change in defined benefit plans, net of income taxes impact, respectively	[2]	(101)	(231)	(741)	(545)
Reclassification adjustment for other activity related to benefit plans, net of income taxes respectively	[3]	(5)	(17)
Reclassification adjustment for settlement losses (gains) and other activity related to benefit plans, net of income taxes, respectively	[3]			5	(78)
Total other comprehensive (loss) income		(134)	(95)	(627)	2,509
Total comprehensive income		$ 6,413	$ 4,718	$ 16,571	$ 15,802
[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 (losses) gains on defined benefit plans during the period.
[3]	The reclassification adjustment for benefit plans includes settlement gains, amortization of prior service costs, and amortization of net gain or loss.  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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Unrealized income arising during the period on available for sale securities, tax	$ 24	$ 51	$ 111	$ 847
Reclassification adjustment for net gain on sales of available for sale securities included in net income, tax	(32)	(9)	(83)	(14)
Change in defined benefit plans, tax	(27)	(61)	(194)	(145)
Reclassification adjustment for settlement gains on benefit plans, tax	$ (1)	$ (4)	$ 1	$ (21)

Consolidated Statements of Chan

Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Previously Reported [Member]	Impact of Adoption of New Accounting Standard [Member]	[1]	Common Stock [Member]	Common Stock [Member]Previously Reported [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Previously Reported [Member]	Retained Earnings [Member]	Retained Earnings [Member]Previously Reported [Member]	Retained Earnings [Member]Impact of Adoption of New Accounting Standard [Member]	[1]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]Previously Reported [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2018	$ 223,525	$ 223,209	$ 316		$ 8,460	$ 8,460	$ 177,565	$ 177,565	$ 39,878	$ 39,562	$ 316		$ (2,378)	$ (2,378)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member				us-gaap:AccountingStandardsUpdate201601Member		us-gaap:AccountingStandardsUpdate201601Member		us-gaap:AccountingStandardsUpdate201601Member				us-gaap:AccountingStandardsUpdate201601Member		us-gaap:AccountingStandardsUpdate201601Member
Net income	$ 4,077								$ 4,077
Total other comprehensive (loss) income, net of taxes	1,807												$ 1,807
Common stock dividends declared	(2,113)								(2,113)
Employee Stock Purchase Plan	28				$ 1		$ 27
Director Stock Purchase Plan	33				1		32
Restricted stock activity	80						80
Balance at Mar. 31, 2019	227,437				8,462		177,704		41,842				(571)
Balance at Dec. 31, 2018	223,525	$ 223,209	$ 316		8,460	$ 8,460	177,565	$ 177,565	39,878	$ 39,562	$ 316		(2,378)	$ (2,378)
Net income	13,293
Total other comprehensive (loss) income, net of taxes	2,509
Balance at Sep. 30, 2019	234,612				8,478		177,994		48,009				131
Balance at Mar. 31, 2019	227,437				8,462		177,704		41,842				(571)
Net income	4,403								4,403
Total other comprehensive (loss) income, net of taxes	797												797
Common stock dividends declared	(1,524)								(1,524)
Employee Stock Purchase Plan	36				2		34
Director Stock Purchase Plan	33				1		32
Restricted stock activity	80						80
Balance at Jun. 30, 2019	231,262				8,465		177,850		44,721				226
Net income	4,813								4,813
Total other comprehensive (loss) income, net of taxes	(95)												(95)
Common stock dividends declared	(1,525)								(1,525)
Employee Stock Purchase Plan	31				1		30
Director Stock Purchase Plan	35				1		34
Restricted stock activity	91				11		80
Balance at Sep. 30, 2019	234,612				8,478		177,994		48,009				131
Balance at Dec. 31, 2019	237,874				8,481		178,159		50,891				343
Net income	3,818								3,818
Total other comprehensive (loss) 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, 2019	237,874				8,481		178,159		50,891				343
Net income	17,198
Total other comprehensive (loss) income, net of taxes	(627)
Balance at Sep. 30, 2020	248,189				8,508		178,659		63,099				(284)		$ (1,793)
Balance at Mar. 31, 2020	239,511				8,484		178,320		52,759				(52)
Net income	6,833								6,833
Total other comprehensive (loss) income, net of taxes	(98)												(98)
Common stock dividends declared	(1,523)								(1,523)
Repurchased stock	(1,560)														(1,560)
Employee Stock Purchase Plan	45				3		42
Director Stock Purchase Plan	41				2		39
Restricted stock activity	96						96
Balance at Jun. 30, 2020	243,345				8,489		178,497		58,069				(150)		(1,560)
Net income	6,547								6,547
Total other comprehensive (loss) income, net of taxes	(134)												(134)
Common stock dividends declared	(1,517)								(1,517)
Repurchased stock	(233)														(233)
Employee Stock Purchase Plan	36				2		34
Director Stock Purchase Plan	41				2		39
Restricted stock activity	104				15		89
Balance at Sep. 30, 2020	$ 248,189				$ 8,508		$ 178,659		$ 63,099				$ (284)		$ (1,793)
[1]	Represents the impact of adopting Accounting Standard Update ASU 2016-02, Leases

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Repurchased stock, Shares	12,129	80,523
Stock issued during period shares, Director Stock Purchase Plans	2,434	2,231	1,743	1,397	1,336	1,361
Stock issued during period shares, Restricted stock activity	14,770			10,637
Common Stock [Member]
Stock issued during period, shares, Employee Stock Purchase Plans	2,113	2,365	1,647	1,249	1,411	1,152

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities:
Net Income	$ 17,198	$ 13,293
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan and lease losses	2,700	1,155
Depreciation	2,393	2,101
Amortization of intangibles	966	1,078
Net amortization of security discounts/premiums	565	547
Amortization of operating lease right of use assets	1,269	1,244
Amortization of finance lease right of use asset	135	105
Gain on sales of investment securities	(393)	(70)
Earnings on cash surrender value of life insurance	(227)	(253)
Mortgage loans originated for sale	(243,179)	(116,313)
Proceeds from sales of mortgage loans originated for sale	226,590	113,505
Gain on sale of mortgage loans	(5,927)	(2,605)
SBA loans originated for sale	(6,410)	(11,187)
Proceeds from sales of SBA loans originated for sale	6,845	11,897
Gain on sale of SBA loans	(435)	(710)
Loss on write-down or disposal of property, plant, and equipment	45	163
Gain on sale or write-down of foreclosed assets, net	(8)	(22)
Stock compensation expense	296	251
Deferred income tax benefit	(2,773)	(682)
Increase in accrued interest receivable	(6,699)	(170)
Decrease (increase) in other assets	1,247	(6,407)
Increase in accrued interest payable	632	561
Net change in operating lease liability	(1,332)	(1,332)
Increase in other liabilities	5,398	1,044
Net Cash (Used In) Provided By Operating Activities	(1,104)	7,193
Investing Activities:
Proceeds from the sale of available-for-sale securities	91,854	69,377
Proceeds from the maturity or call of available-for-sale securities	8,513	8,860
Purchases of available-for-sale securities	(71,297)	(14,911)
Proceeds from the maturity or call of held-to-maturity securities	93,029	18,892
Purchases of held-to-maturity securities	(95,758)	(21,328)
Purchases of equity securities, available for sale	(1,000)
(Purchases) redemptions of restricted investment in bank stock	(2,824)	541
Net increase in loans and leases	(760,645)	(87,000)
Proceeds from bank owned life insurance		140
Purchases of bank premises and equipment	(2,938)	(1,592)
Proceeds from the sale of foreclosed assets	17	1,306
Net Cash Used In Investing Activities	(741,049)	(25,715)
Financing Activities:
Net increase in deposits	544,004	164,067
Net increase (decrease) in short-term borrowings	203,842	(31,100)
Common stock dividends paid	(4,990)	(5,162)
Treasury stock purchased	(1,793)
Net change in finance lease liability	(62)	(26)
Proceeds from the issuance of subordinated debt	15,000
Issuance of long-term debt	70,000	13,500
Long-term debt repayment	(27,740)	(2,139)
Net Cash Provided By Financing Activities	798,480	139,336
Net increase in cash and cash equivalents	56,327	120,814
Cash and cash equivalents, beginning of period	139,030	40,065
Cash and cash equivalents, end of period	195,357	160,879
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	14,958	17,973
Cash paid for income taxes	2,370	3,735
Supplemental Noncash Disclosures:
Recognition of operating lease right of use assets		11,661
Recognition of operating lease liabilities		12,866
Recognition of finance lease right of use asset		3,597
Recognition of finance lease liability		3,597
Asset transferred to bank premises and equipment held for sale	210	1,274
Loans transferred to foreclosed assets held for sale	1,529	397
Employee [Member]
Financing Activities:
Proceeds from Stock Purchase Plan stock issuance	108	95
Director [Member]
Financing Activities:
Proceeds from Stock Purchase Plan stock issuance	$ 111	$ 101

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2020
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 function 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 September 30, 2020, 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 September 30, 2019 and December 31, 2019 have been reclassified, when necessary, to conform to the 2020 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, 2019. Mid Penn has evaluated events and transactions occurring subsequent to the balance sheet date of September 30, 2020, 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.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
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 that may be sold in response to liquidity needs, changes in interest rates, resultant prepayment risk, pledging requirements, 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, 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 other-than-temporary impairment 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 On March 27, 2020, in response to the novel coronavirus (“COVID-19”) pandemic, the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was signed into law by President Donald Trump. This legislation created the federal Paycheck Protection Program (“PPP”) which permitted eligible business entities to apply for loans through a participating financial institution to cover payroll, rent, and other business expenses during the COVID-19 pandemic. The PPP loans, which are 100 percent guaranteed by the Small Business Administration (“SBA”), have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term. The vast majority of Mid Penn’s PPP loans have a two-year Receivables—Nonrefundable Fees and Other Costs and will be amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of each respective loan. During the three and nine months ended September 30, 2020, Mid Penn recognized $ and $ 4,954,000 , respectively, of PPP processing fees within interest and fees on loans and leases on the Consolidated Statements of Income. As of September 30, 2020, Mid Penn had $613,924,000 of net PPP loans outstanding ($629,853,000 of gross PPP loans, net of deferred PPP processing fees of $15,929,000) with all of these loans being recorded in the commercial and industrial loan portfolio classification. 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 $83,000 at September 30, 2020 and $80,000 at December 31, 2019. 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. 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. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate. As of September 30, 2020, Mid Penn had $613,924,000 of PPP loans outstanding, net of deferred fees, 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 $295,290,000 and $414,498,000 as of September 30, 2020 and December 31, 2019, 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 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 designated as held for sale are carried at the lower of cost or market value, and, at September 30, 2020, totaled $210,000 related to a full-service retail banking property to be closed and listed for sale on December 31, 2020. The balance of the bank premi

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019 are as follows: (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value September 30, 2020 Available-for-sale debt securities: Mortgage-backed U.S. government agencies $ 2 $ — $ — $ 2 Corporate debt securities 8,359 2 26 8,335 Total available-for-sale debt securities 8,361 2 26 8,337 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 20,003 $ 138 $ — $ 20,141 Mortgage-backed U.S. government agencies 45,793 1,005 21 46,777 State and political subdivision obligations 64,151 2,952 19 67,084 Corporate debt securities 10,527 196 17 10,706 Total held-to-maturity debt securities 140,474 4,291 57 144,708 Total $ 148,835 $ 4,293 $ 83 $ 153,045 (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value December 31, 2019 Available-for-sale debt securities: U.S. government agencies $ 22,894 $ 6 $ 70 $ 22,830 Mortgage-backed U.S. government agencies 12,996 7 113 12,890 State and political subdivision obligations 30 — — 30 Corporate debt securities 1,250 9 — 1,259 Total available-for-sale debt securities 37,170 22 183 37,009 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 50,210 $ 46 $ 220 $ 50,036 Mortgage-backed U.S. government agencies 42,098 95 102 42,091 State and political subdivision obligations 44,169 1,193 13 45,349 Total held-to-maturity debt securities 136,477 1,334 335 137,476 Total $ 173,647 $ 1,356 $ 518 $ 174,485 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 comparable instruments, 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 $118,143,000 at September 30, 2020 and $147,283,000 at December 31, 2019 were pledged to secure public deposits, some trust account holdings, and certain other borrowings. 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 $306,551,000 as of September 30, 2020 and $169,051,000 as of December 31, 2019. 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 September 30, 2020 and December 31, 2019. (Dollars in thousands) Less Than 12 Months 12 Months or More Total Number Number Number of Fair Unrealized of Fair Unrealized of Fair Unrealized September 30, 2020 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale debt securities: Corporate debt securities 3 $ 4,048 $ 26 0 $ — $ — 3 $ 4,048 $ 26 Total temporarily impaired available-for-sale debt securities 3 $ 4,048 $ 26 0 $ — $ — 3 $ 4,048 $ 26 Held-to-maturity debt securities: Mortgage-backed U.S. government agencies 4 $ 6,730 $ 21 0 $ — $ — 4 $ 6,730 $ 21 State and political subdivision obligations 7 2,515 19 0 — — 7 2,515 19 Corporate debt securities 6 5,420 17 0 — — 6 5,420 17 Total temporarily impaired held-to-maturity debt securities 17 $ 14,665 $ 57 0 $ — $ — 17 $ 14,665 $ 57 Total 20 $ 18,713 $ 83 0 $ — $ — 20 $ 18,713 $ 83 (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, 2019 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale securities: U.S. government agencies 4 $ 4,652 $ 24 7 $ 11,982 $ 46 11 $ 16,634 $ 70 Mortgage-backed U.S. government agencies 1 1,643 4 14 10,603 109 15 12,246 113 Total temporarily impaired available-for-sale securities 5 $ 6,295 $ 28 21 $ 22,585 $ 155 26 $ 28,880 $ 183 Held-to-maturity securities: U.S. Treasury and U.S. government agencies 18 $ 29,024 $ 219 1 $ 2,999 $ 1 19 $ 32,023 $ 220 Mortgage-backed U.S. government agencies 6 8,445 35 13 11,050 67 19 19,495 102 State and political subdivision obligations 3 1,383 13 0 — — 3 1,383 13 Total temporarily impaired held to maturity securities 27 $ 38,852 $ 267 14 $ 14,049 $ 68 41 $ 52,901 $ 335 Total 32 $ 45,147 $ 295 35 $ 36,634 $ 223 67 $ 81,781 $ 518 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 September 30, 2020, the majority of available-for-sale securities and held-to-maturity securities in an unrealized loss position were corporate debt securities. At December 31, 2019, the majority of the unrealized losses on securities in an unrealized loss position were attributed to U.S. government agencies and mortgage-back U.S. government agencies. Mid Penn had no securities considered by management to be other-than-temporarily impaired as of September 30, 2020, December 31, 2019, or September 30, 2019, 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 and nine months ended September 30, 2020 and 2019 are shown in the table below. (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Realized gains $ 150 $ 64 $ 405 $ 133 Realized losses — (18 ) (12 ) (63 ) Net gains $ 150 $ 46 $ 393 $ 70 The table below illustrates the maturity distribution of investment securities at amortized cost and fair value as of September 30, 2020. (Dollars in thousands) Available-for-sale Held-to-maturity Amortized Fair Amortized Fair September 30, 2020 Cost Value Cost Value Due in 1 year or less $ — $ — $ 3,159 $ 3,176 Due after 1 year but within 5 years 2,250 2,250 26,249 27,288 Due after 5 years but within 10 years 6,109 6,085 62,051 64,196 Due after 10 years — — 3,222 3,271 8,359 8,335 94,681 97,931 Mortgage-backed securities 2 2 45,793 46,777 $ 8,361 $ 8,337 $ 140,474 $ 144,708

Loans and Allowance for Loan an

Loans and Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2020
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 The types of loans in Mid Penn’s portfolio, summarized by those rated as “pass” (net of deferred fees and costs of $16,536,000 as of September 30, 2020 and $1,081,000 as of December 31, 2019), and the loans classified as “special mention” and “substandard” within Mid Penn’s internal risk rating system as of September 30, 2020 and December 31, 2019, are as follows: (Dollars in thousands) Special September 30, 2020 Pass Mention Substandard Total Commercial and industrial $ 956,097 $ 9,657 $ 3,121 $ 968,875 Commercial real estate 1,004,999 2,406 14,013 1,021,418 Commercial real estate - construction 238,176 — 32 238,208 Residential mortgage 214,177 53 1,359 215,589 Home equity 68,002 5 2,393 70,400 Consumer 7,337 — — 7,337 $ 2,488,788 $ 12,121 $ 20,918 $ 2,521,827 (Dollars in thousands) Special December 31, 2019 Pass Mention Substandard Total Commercial and industrial $ 326,573 $ 9,558 $ 3,016 $ 339,147 Commercial real estate 913,001 2,426 13,711 929,138 Commercial real estate - construction 181,650 — 40 181,690 Residential mortgage 235,252 55 1,417 236,724 Home equity 68,224 — 47 68,271 Consumer 7,786 — — 7,786 $ 1,732,486 $ 12,039 $ 18,231 $ 1,762,756 The increase in deferred fees and costs from December 31, 2019 to September 30, 2020 was the result of collected but unearned PPP loan processing fees related to the PPP loans which Mid Penn processed and disbursed during the second and third quarters of 2020. PPP loans 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 September 30, 2020. Mid Penn had no loans classified as doubtful as of September 30, 2020 and December 31, 2019. Impaired loans by loan portfolio class as of September 30, 2020 and December 31, 2019 are summarized as follows: September 30, 2020 December 31, 2019 (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 $ 859 $ 891 $ — $ 890 $ 890 $ — Commercial real estate 7,074 7,425 — 7,973 8,366 — Commercial real estate - construction 32 34 — 40 61 — Residential mortgage 834 859 — 817 838 — Home equity 2,386 2,417 — 25 27 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ — $ 3 $ 68 $ — Commercial real estate 1,426 1,698 — 1,423 1,708 — Commercial real estate - construction — — — — — — Residential mortgage 342 585 — 381 578 — Home equity — 14 — 1 5 — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 53 $ 73 $ 41 $ — $ — $ — Commercial real estate 360 405 141 338 380 166 Commercial real estate - construction — — — — — — Residential mortgage — — — — — — Home equity — — — — — — Consumer — — — — — — Total Impaired Loans: Commercial and industrial $ 912 $ 964 $ 41 $ 893 $ 958 $ — Commercial real estate 8,860 9,528 141 9,734 10,454 166 Commercial real estate - construction 32 34 — 40 61 — Residential mortgage 1,176 1,444 — 1,198 1,416 — Home equity 2,386 2,431 — 26 32 — Consumer — — — — — — The average recorded investment of impaired loans and related interest income recognized for the three and nine months ended September 30, 2020 and 2019 are summarized as follows: Three Months Ended September 30, 2020 September 30, 2019 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 932 $ — $ — $ — Commercial real estate 7,171 5 1,917 — Commercial real estate - construction 32 — 40 4 Residential mortgage 805 6 889 7 Home equity 2,396 — 27 — Consumer — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ 11 $ — Commercial real estate 1,428 — 1,630 — Commercial real estate - construction — — — — Residential mortgage 347 — 1,055 — Home equity — — 4 — Consumer — — — — With an allowance recorded: Commercial and industrial $ 130 $ — $ 38 $ — Commercial real estate 560 — 617 — Commercial real estate - construction — — — — Residential mortgage — — — — Home equity — — — — Consumer — — — — Total Impaired Loans: Commercial and industrial $ 1,062 $ — $ 49 $ — Commercial real estate 9,159 5 4,164 — Commercial real estate - construction 32 — 40 4 Residential mortgage 1,152 6 1,944 7 Home equity 2,396 — 31 — Consumer — — — — Nine Months Ended September 30, 2020 September 30, 2019 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 911 $ — $ — $ — Commercial real estate 7,325 5 2,697 11 Commercial real estate - construction 36 — 40 — Residential mortgage 794 19 1,151 21 Home equity 1,210 — 38 — Consumer — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ 1 $ — $ 22 $ — Commercial real estate 1,423 — 1,602 — Commercial real estate - construction — — — — Residential mortgage 361 — 1,152 — Home equity 1 — 4 — Consumer — — — — With an allowance recorded: Commercial and industrial $ 67 $ — $ 1,202 $ 3 Commercial real estate 530 — 633 — Commercial real estate - construction — — 183 — Residential mortgage — — — — Home equity — — — — Consumer — — — — Total Impaired Loans: Commercial and industrial $ 979 $ — $ 1,224 $ 3 Commercial real estate 9,278 5 4,932 11 Commercial real estate - construction 36 — 223 — Residential mortgage 1,155 19 2,303 21 Home equity 1,211 — 42 — Consumer — — — — Nonaccrual loans by loan portfolio class, including loans acquired with credit deterioration, as of September 30, 2020 and December 31, 2019 are summarized as follows: (Dollars in thousands) September 30, 2020 December 31, 2019 Commercial and industrial $ 913 $ 894 Commercial real estate 8,859 9,800 Commercial real estate - construction 32 40 Residential mortgage 706 711 Home equity 2,386 26 $ 12,896 $ 11,471 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 September 30, 2020 and December 31, 2019 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 September 30, 2020 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ — $ 1,490 $ 866 $ 2,356 $ 966,519 $ 968,875 $ — Commercial real estate — 1,029 6,842 7,871 1,012,121 1,019,992 — Commercial real estate - construction — — — — 238,208 238,208 — Residential mortgage — 2 328 330 214,917 215,247 — Home equity — 16 2,364 2,380 68,020 70,400 — Consumer 3 1 — 4 7,333 7,337 — Loans acquired with credit deterioration: Commercial and industrial — — — — — — — Commercial real estate — — 1,417 1,417 9 1,426 — Commercial real estate - construction — — — — — — — Residential mortgage — — 182 182 160 342 — Home equity — — — — — — — Consumer — — — — — — — Total $ 3 $ 2,538 $ 11,999 $ 14,540 $ 2,507,287 $ 2,521,827 $ — Loans (Dollars in thousands) 30-59 60-89 Greater Receivable > Days Past Days Past than 90 Total Past 90 Days and December 31, 2019 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ — $ 1,059 $ 890 $ 1,949 $ 337,195 $ 339,144 $ — Commercial real estate 1,298 11 7,819 9,128 918,587 927,715 — Commercial real estate - construction — — — — 181,690 181,690 — Residential mortgage 145 — 326 471 235,872 236,343 — Home equity 34 — — 34 68,236 68,270 — Consumer 5 3 — 8 7,778 7,786 — Loans acquired with credit deterioration: Commercial and industrial — — 3 3 — 3 — Commercial real estate 16 473 934 1,423 — 1,423 — Commercial real estate - construction — — — — — — — Residential mortgage 5 — 203 208 173 381 — Home equity — — — — 1 1 — Consumer — — — — — — — Total $ 1,503 $ 1,546 $ 10,175 $ 13,224 $ 1,749,532 $ 1,762,756 $ — 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 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 $ balance of PPP loans outstanding (net of related deferred PPP fees) as of September 30 , 2020. The following tables summarize the allowance and recorded investments in loans receivable. (Dollars in thousands) As of, and for the three months ended, September 30, 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, July 1, 2020 $ 2,786 $ 7,241 $ 65 $ 427 $ 517 $ 2 $ 29 $ 11,067 Charge-offs — — — (4 ) — (4 ) — (8 ) Recoveries — — — — — 11 — 11 Provisions (credits) 138 529 (4 ) 47 14 (7 ) 383 1,100 Ending balance, September 30, 2020 $ 2,924 $ 7,770 $ 61 $ 470 $ 531 $ 2 $ 412 $ 12,170 (Dollars in thousands) As of, and for the nine months ended, September 30, 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 (45 ) — (7 ) (4 ) — (22 ) — (78 ) Recoveries 2 1 2 3 1 24 — 33 Provisions (credits) 626 1,510 15 54 88 (2 ) 409 2,700 Ending balance, September 30, 2020 2,924 7,770 61 470 531 2 412 12,170 Individually evaluated for impairment 41 141 — — — — — 182 Ending balance: Collectively evaluated for impairment $ 2,883 $ 7,629 $ 61 $ 470 $ 531 $ 2 $ 412 $ 11,988 Loans receivables: Ending balance $ 968,875 $ 1,021,418 $ 238,208 $ 215,589 $ 70,400 $ 7,337 $ — $ 2,521,827 Ending balance: individually evaluated for impairment 912 7,434 32 834 2,386 — — 11,598 Ending balance: acquired with credit deterioration — 1,426 — 342 — — — 1,768 Ending balance: collectively evaluated for impairment $ 967,963 $ 1,012,558 $ 238,176 $ 214,413 $ 68,014 $ 7,337 $ — $ 2,508,461 (Dollars in thousands) December 31, 2019 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 $ 2,341 $ 6,259 $ 51 $ 417 $ 442 $ 2 $ 3 $ 9,515 Ending balance: individually evaluated for impairment — 166 — — — — — 166 Ending balance: collectively evaluated for impairment $ 2,341 $ 6,093 $ 51 $ 417 $ 442 $ 2 $ 3 $ 9,349 Loans receivable: Ending balance $ 339,147 $ 929,138 $ 181,690 $ 236,724 $ 68,271 $ 7,786 $ — $ 1,762,756 Ending balance: individually evaluated for impairment 890 8,311 40 817 25 — — 10,083 Ending balance: acquired with credit deterioration 3 1,423 — 381 1 — — 1,808 Ending balance: collectively evaluated for impairment $ 338,254 $ 919,404 $ 181,650 $ 235,526 $ 68,245 $ 7,786 $ — $ 1,750,865 (Dollars in thousands) As of, and for the three months ended, September 30, 2019 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, July 1, 2019 $ 2,448 $ 5,312 $ 45 $ 476 $ 482 $ 7 $ 1 $ 8,771 Charge-offs (12 ) (42 ) — (3 ) — (9 ) — (66 ) Recoveries 1 41 — 2 1 1 — 46 Provisions (credits) 6 544 1 (7 ) 13 6 2 565 Ending balance, September 30, 2019 $ 2,443 $ 5,855 $ 46 $ 468 $ 496 $ 5 $ 3 $ 9,316 (Dollars in thousands) As of, and for the nine months ended, September 30, 2019 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, 2019 2,391 4,703 75 453 528 7 240 $ 8,397 Charge-offs (217 ) (53 ) (40 ) (3 ) — (57 ) — (370 ) Recoveries 44 74 — 2 2 12 — 134 Provisions (credits) 225 1,131 11 16 (34 ) 43 (237 ) 1,155 Ending balance, September 30, 2019 2,443 5,855 46 468 496 5 3 9,316 Individually evaluated for impairment — 336 — — — — — 336 Ending balance: collectively evaluated for impairment $ 2,443 $ 5,519 $ 46 $ 468 $ 496 $ 5 $ 3 $ 8,980 Loans receivables: Ending balance $ 320,400 $ 892,060 $ 177,151 $ 243,729 $ 69,240 $ 7,854 $ — $ 1,710,434 Ending balance: individually evaluated for impairment — 2,324 40 881 26 — — 3,271 Ending balance: acquired with credit deterioration 5 1,643 — 494 4 — — 2,146 Ending balance: collectively evaluated for impairment $ 320,395 $ 888,093 $ 177,111 $ 242,354 $ 69,210 $ 7,854 $ — $ 1,705,017 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 September 30, 2020 totaled $928,000 and included three accruing impaired residential mortgage loans to unrelated borrowers in compliance with the terms of the modifications totaling $470,000. The remaining $458,000 of troubled debt restructurings was attributable to seven loans among five relationships which were classified as nonaccrual impaired based upon a collateral evaluation in accordance with the guidance on impaired loans. The balance of nonaccrual impaired troubled debt restructured loans as of September 30, 2020 was comprised of $409,000 in commercial real estate loans amongst two borrowers, one commercial real estate construction loan for $31,000, one residential mortgage loan for $11,000, and one commercial and industrial loan for $7,000. As of September 30, 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. Mid Penn’s troubled debt restructured loans at December 31, 2019 totaled $2,238,000, and included three accruing impaired residential mortgage loans to unrelated borrowers in compliance with the terms of the modifications totaling $490,000. The remaining $1,748,000 of troubled debt restructurings was attributable to eight loans among five relationships which were classified as nonaccrual impaired based upon a collateral evaluation in accordance with the guidance on impaired loans. One large relationship accounted for $1,252,000 of the total $1,748,000 in nonaccrual impaired troubled debt restructured loans. As of December 31, 2019, 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 2019. The recorded investments in troubled debt restructured loans at September 30, 2020 and December 31, 2019 are as follows: (Dollars in thousands) Pre-Modification Post-Modification September 30, 2020 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 8 $ 8 $ 7 Commercial real estate 1,214 1,115 409 Commercial real estate - construction 40 40 31 Residential mortgage 689 687 481 $ 1,951 $ 1,850 $ 928 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2019 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 3 $ 3 $ 3 Commercial real estate 2,562 2,463 1,705 Commercial real estate - construction 40 40 40 Residential mortgage 677 675 490 $ 3,282 $ 3,181 $ 2,238 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. During 2020, Mid Penn had provided loan modifications meeting the CARES Act qualifications to over 1,000 borrowers. Mid Penn remains in communication with each of these borrowers to assess the ongoing credit status of the borrowers, and may make further adjustments to a borrower’s modification at some future time if warranted for the specific situation. As of September 30, 2020, the principal balance of loans remaining in this CARES Act qualifying deferment status totaled $32,851,000, or 1 percent of the total loan portfolio, a significant reduction compared to June 30, 2020, when $444,486,000 of loans, representing 18 percent of the total loan portfolio, were in this deferment status, as most borrowers have returned to regular payment status. 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 and nine months ended September 30, 2020 . (Dollars in thousands) Three Months Ended September 30, 2020 2019 Accretable yield, beginning of period $ 56 $ 197 Accretable yield amortized to interest income (7 ) (55 ) Accretable yield, end of period $ 49 $ 142 (Dollars in thousands) Nine Months Ended September 30, 2020 2019 Accretable yield, beginning of period $ 89 $ 309 Accretable yield amortized to interest income (40 ) (167 ) Accretable yield, end of period $ 49 $ 142

Leases

Leases	9 Months Ended
	Sep. 30, 2020
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 two subleasing agreements with unrelated parties on one of its properties under an operating lease. Both subleases included escalation clauses. The first sublease agreement began on April 1, 2016, while the second sublease began on July 1, 2016. One sublease was terminated during the first quarter of 2019 due to the bankruptcy of the tenant. The remaining sublease ends on March 31, 2021. 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 September 30, 2020. 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 September 30, 2020 and December 31, 2019. (Dollars in thousands) September 30, 2020 December 31, 2019 Operating Leases Finance Lease Operating Leases Finance Lease Right of use asset $ 10,173 $ 3,312 $ 11,442 $ 3,447 Lease liability $ 11,212 $ 3,488 $ 12,544 $ 3,551 Weighted average remaining lease term (in years) 8.30 18.42 8.64 19.17 Weighted average discount rate 3.35 % 3.81 % 3.33 % 3.81 % A summary of lease costs during the three and nine months ended September 30, 2020 and 2019 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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Finance lease cost: Amortization of right-of-use asset $ 45 $ 45 $ 135 $ 105 Interest expense on lease liability 33 34 100 80 Total finance lease cost 78 79 235 185 Operating lease cost 504 515 1,537 1,545 Short-term and equipment lease cost 10 11 31 42 Variable lease cost — — — — Sublease income (3 ) (6 ) (13 ) (18 ) Total lease costs $ 589 $ 599 $ 1,790 $ 1,754 A summary of cash paid for amounts included in the measurement of lease liabilities is presented below. (Dollars in thousands) Nine Months Ended September 30, 2020 September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 100 $ 80 Operating cash flows from operating leases 1,584 1,633 Financing cash flows from finance leases 62 26 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) September 30, 2020 Operating Leases Finance Lease Lease payments due: Within one year $ 521 $ 54 After one but within two years 1,868 216 After two but within three years 1,824 217 After three but within four years 1,572 217 After four but within five years 1,512 252 After five years 5,584 3,992 Total undiscounted cash flows 12,881 4,948 Discount on cash flows (1,669 ) (1,460 ) Total lease liability $ 11,212 $ 3,488

Loan-Level Interest Rate Swaps

Loan-Level Interest Rate Swaps	9 Months Ended
	Sep. 30, 2020
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 commercial loan customers to meet their interest rate risk management needs. Mid Penn simultaneously enters into 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) September 30, 2020 December 31, 2019 Interest Rate Swap Contracts - Commercial Loans: Fair Value (a) $ 213 $ — Notional Amount 8,826 — Cash Collateral Posted (b) 250 — (a) Included in other assets 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) September 30, 2020 December 31, 2019 Interest Rate Swap Contracts - Commercial Loans: Gross amounts recognized $ 213 $ — Gross amounts offset 213 — Net Amounts Presented in the Consolidated Balance Sheets — — Gross amounts not offset: Financial instruments — — Cash collateral 250 — Net Amounts $ 250 $ —

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2020
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 nine months ended September 30, 2020 and 2019. The following tables illustrate the assets measured at fair value on a recurring basis segregated by hierarchy fair value levels. Fair value measurements at September 30, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: September 30, 2020 (Level 1) (Level 2) (Level 3) Available-for-sale securities: Mortgage-backed U.S. government agencies $ 2 $ — $ 2 $ — Corporate debt securities 8,335 — 8,335 — Other assets: Equity securities 1,522 1,522 — — Interest rate swap agreements 213 — 213 — Total $ 10,072 $ 1,522 $ 8,550 $ — Fair value measurements at December 31, 2019 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2019 (Level 1) (Level 2) (Level 3) Available-for-sale securities: U.S. government agencies $ 22,830 $ — $ 22,830 $ — Mortgage-backed U.S. government agencies 12,890 — 12,890 — State and political subdivision obligations 30 — 30 — Corporate debt securities 1,259 — 1,259 — Other assets: Equity securities 507 507 — — Total $ 37,516 $ 507 $ 37,009 $ — 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 September 30, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: September 30, 2020 (Level 1) (Level 2) (Level 3) Impaired Loans $ 398 $ — $ — $ 398 Foreclosed Assets Held for Sale 121 — — 121 Fair value measurements at December 31, 2019 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2019 (Level 1) (Level 2) (Level 3) Impaired Loans $ 271 $ — $ — $ 271 Foreclosed Assets Held for Sale 122 — — 122 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 September 30, 2020 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 398 Appraisal of collateral (a), (b) Appraisal adjustments (b) 25% - 88% 34% Foreclosed Assets Held for Sale 121 Appraisal of collateral (a), (b) Appraisal adjustments (b) 27% - 27% 27% (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements December 31, 2019 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 271 Appraisal of collateral (a), (b) Appraisal adjustments (b) 26% - 85% 36% Foreclosed Assets Held for Sale 122 Appraisal of collateral (a), (b) Appraisal adjustments (b) 8% - 27% 16% (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 for the nine months ended September 30, 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 September 30, 2020 and December 31, 2019. (Dollars in thousands) September 30, 2020 December 31, 2019 Carrying Fair Carrying Fair Value Value Value Value Financial assets: Cash and cash equivalents $ 195,357 $ 195,357 $ 139,030 $ 139,030 Available-for-sale investment securities 8,337 8,337 37,009 37,009 Held-to-maturity investment securities 140,474 144,708 136,477 137,476 Equity securities 1,522 1,522 507 507 Loans held for sale 30,938 31,586 8,422 8,630 Net loans and leases 2,509,657 2,596,329 1,753,241 1,789,402 Restricted investment in bank stocks 7,726 7,726 4,902 4,902 Accrued interest receivable 14,663 14,663 2,810 2,810 Interest rate swap agreements 213 213 — — Financial liabilities: Deposits $ 2,456,398 2,465,117 $ 1,912,394 $ 1,916,624 Short-term borrowings 203,842 203,842 — — Long-term debt (a) 71,711 71,243 29,352 30,216 Subordinated debt 41,972 40,352 27,070 25,273 Accrued interest payable 2,840 2,840 2,208 2,208 (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 September 30, 2020 and December 31, 2019. The following tables present the carrying amount, fair value, and placement in the fair value hierarchy of Mid Penn’s financial instruments as of September 30, 2020 and December 31, 2019. 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 September 30, 2020 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 140,474 $ 144,708 $ — $ 144,708 $ — Loans held for sale 30,938 31,586 — 31,586 — Net loans and leases 2,509,657 2,596,329 — — 2,596,329 Financial instruments - liabilities Deposits $ 2,456,398 $ 2,465,117 $ — $ 2,465,117 $ — Long-term debt (a) 71,711 71,243 — 71,243 — Subordinated debt 41,972 40,352 — 40,352 — 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, 2019 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 136,477 $ 137,476 $ — $ 137,476 $ — Loans held for sale 8,422 8,630 — 8,630 — Net loans and leases 1,753,241 1,789,402 — — 1,789,402 Financial instruments - liabilities Deposits $ 1,912,394 $ 1,916,624 $ — $ 1,916,624 $ — Long-term debt (a) 29,352 30,216 — 30,216 — Subordinated debt 27,070 25,273 — 25,273 — (a) Long-term debt excludes finance lease obligations.

Guarantees, Commitments, and Co

Guarantees, Commitments, and Contingencies	9 Months Ended
	Sep. 30, 2020
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 $39,682,000 and $26,574,000 of standby letters of credit outstanding as of September 30, 2020 and December 31, 2019, respectively. Mid Penn does not anticipate any losses because of these transactions. The amount of the liability as of September 30, 2020 and December 31, 2019 for payment under standby letters of credit issued was not material. Commitments Mid Penn also has a limited partnership interest in a low-income housing project to construct thirty-seven apartments and common amenities in Dauphin County, Pennsylvania. The total investment in this limited partnership, net of amortization to date, was $6,872,000 and $7,249,000 on September 30, 2020 and December 31, 2019, 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 commitment is $7,579,000. Investments made to date, and future payments under this commitment are paid in installments over the course of construction of the low-income housing facilities. Each installment payment is conditional upon both Mid Penn’s review and approval of the installment payment certificate and continued compliance with the terms of the original partnership agreement. The investment in the limited partnership is reported in other assets on the Consolidated Balance Sheet and is being amortized over a ten-year ten-year Contingencies As of September 30, 2020, Mid Penn had received a total of $20,883,000 of nonrefundable loan processing fees related to the loans disbursed as a result of the SBA’s Paycheck Protection Program (“PPP”) created when the CARES Act was signed into law on March 27, 2020. These fees, and any offsetting loan origination costs, were deferred in accordance with FASB ASC 310-20, Receivables—Nonrefundable Fees and Other Costs, and have since 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 September 30, 2020, Mid Penn is not aware of any PPP loans outstanding, or 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	9 Months Ended
	Sep. 30, 2020
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 our 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 $1,220,316,000 at September 30, 2020. The Bank had short-term borrowing capacity from the FHLB up to the Bank’s unused borrowing capacity of $471,029,000 (equal to $851,213,000 of maximum borrowing capacity less letter of credit and other FHLB advances outstanding) at September 30, 2020 upon satisfaction of any stock purchase requirements of the FHLB. No draws were outstanding on short-term FHLB or correspondent bank borrowings as of September 30, 2020 and December 31, 2019. The Bank also has unused overnight lines of credit with other correspondent banks amounting to $35,000,000 at September 30, 2020. No draws have been made on these lines of credit and on September 30, 2020 and December 31, 2019, the balance was zero. Short-term PPPLF Borrowings The entire balance of short-term borrowings of $203,842,000 at September 30, 2020 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%. Draws of PPPLF funds must be repaid to the Federal Reserve immediately after the specific PPP loans collateralizing the related draws are repaid to the Bank. Mid Penn had no short-term PPPLF borrowings as of December 31, 2019. Long-term Debt As a member of the FHLB, the Bank can access a number of credit products which are utilized to provide liquidity. As of September 30, 2020, and December 31, 2019, the Bank had long-term debt outstanding in the amount of $75,199,000 and $32,903,000, respectively, consisting of FHLB fixed rate instruments, and a finance lease obligation executed during the first quarter of 2019. The FHLB fixed rate instruments 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. These FHLB letter of credit commitments totaled $306,551,000 as of September 30, 2020 and $169,051,000 as of December 31, 2019. The following table presents a summary of long-term debt as of September 30 , 2020 and December 31, 2019. (Dollars in thousands) September 30, 2020 December 31, 2019 FHLB fixed rate instruments: Due June 2020, 1.72% $ — $ 2,000 Due July 2020, 2.45% — 5,000 Due August 2020, 3.05% — 5,000 Due September 2020, 2.38% — 2,500 Due October 2020, 3.06% — 5,000 Due November 2020, 2.32% — 3,000 Due December 2020, 1.78% — 2,000 Due December 2020, 2.31% — 3,000 Due April 2022, 0.86% 70,000 — Due August 2026, 4.80% 1,667 1,846 Due February 2027, 6.71% 44 47 Less: fair value adjustments on debt assumed in acquisitions — (41 ) Total FHLB fixed rate instruments 71,711 29,352 Lease obligations included in long-term debt 3,488 3,551 Total long-term debt $ 75,199 $ 32,903 As part of asset/liability and interest rate risk management strategies, Mid Penn prepaid $22,500,000 of FHLB fixed rate instruments originally due at various times in 2020, and recognized prepayment penalties of $26,000 for the three months ended September 30, 2020, and $165,000 for the nine months ended September 30, 2020. Prepayment penalties are included in other expenses on the Consolidated Statement of Income. No prepayment penalties were recognized during the three and nine months ended September 30, 2019

Subordinated Debt

Subordinated Debt	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Subordinated Debt	( 10 ) Subordinated Debt Subordinated Debt Issued March 2020 On March 20, 2020, Mid Penn entered into agreements with accredited investors who purchased $15,000,000 aggregate principal amount of Mid Penn Subordinated Notes due 2030 (the “2020 Notes”). The 2020 Notes are intended to be treated as Tier 2 capital for regulatory capital purposes. The 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 2020 Notes are floating will at no time be less than 4.25%. Interest will be 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 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 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 2020 Notes at 100% of the principal amount of the 2020 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption. Holders of the 2020 Notes may not accelerate the maturity of the 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 2020 Notes as of September 30, 2020. 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”). In accordance with purchase accounting principles, the First Priority Notes were assigned a fair value premium of $247,000, which is amortized through interest expense until the maturity date of November 30, 2025. The First Priority Notes are intended to be treated as Tier 2 capital for regulatory reporting purposes. The First Priority Notes agreements were entered into by First Priority, on November 13, 2015, with five accredited investors pursuant to which First Priority issued subordinated notes totaling $9,500,000. The First Priority Notes have a maturity date of November 30, 2025, and bear interest at a fixed rate of 7.00% per annum. The First Priority Notes are non-callable for an initial period of five years and include provisions for redemption pricing between 101.5% and 100.5% of the liquidation value if called after five years but prior to the stated maturity date. Subordinated Debt Issued December 2017 On December 19, 2017, Mid Penn 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 September 30, 2020 and December 31, 2019. Subordinated Debt Issued December 2015 On December 9, 2015, Mid Penn sold $7,500,000 aggregate principal amount of Subordinated Debt (the “2015 Notes”) due 2025. The 2015 Notes are treated as Tier 2 capital for regulatory capital purposes. 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 September 30, 2020 and December 31, 2019. ASC Subtopic 835-30, Simplifying the Presentation of Debt Issuance Costs

Defined Benefit Plans

Defined Benefit Plans	9 Months Ended
	Sep. 30, 2020
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, Mid Penn has assumed a noncontributory defined benefit pension plan covering certain former employees of Scottdale. Mid Penn contributed $200,000 to the defined benefit pension plan during the three and nine months ended September 30, 2020. 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 September 30, (Dollars in thousands) Pension Benefits Other Benefits 2020 2019 2020 2019 Service cost $ 32 $ 36 $ 1 $ - Interest cost 53 65 3 5 Expected return on plan assets (68 ) (63 ) — — Accretion of prior service cost — — (5 ) (5 ) Amortization of net gain — (15 ) (1 ) (1 ) Settlement loss (gain) — — — — Net periodic benefit expense (income) $ 17 $ 23 $ (2 ) $ (1 ) Nine Months Ended September 30, (Dollars in thousands) Pension Benefits Other Benefits 2020 2019 2020 2019 Service cost $ 96 $ 107 $ 2 $ 2 Interest cost 158 194 9 13 Expected return on plan assets (205 ) (190 ) — — Accretion of prior service cost — — (15 ) (15 ) Amortization of net gain — (44 ) (1 ) (3 ) Settlement loss (gain) 22 (37 ) — — Net periodic benefit expense (income) $ 71 $ 30 $ (5 ) $ (3 ) 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, amortization (accretion) of prior service cost, and amortization of (gain) loss are reported as a component of other income.

Common Stock

Common Stock	9 Months Ended
	Sep. 30, 2020
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 announced the adoption of a treasury stock repurchase program authorizing the repurchase of up to $15,000,000 of Mid Penn’s outstanding common stock, which represents approximately 10.2% of the issued shares based on Mid Penn’s closing stock price and shares issued as of September 30, 2020. 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 is authorized to continue through March 19, 2021, unless otherwise extended by Mid Penn’s Board of Directors. 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 September 30, 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. Authorized Shares At the May 14, 2019 annual shareholder meeting, Mid Penn shareholders approved an amendment to the Articles of Incorporation to increase the number of authorized shares of common stock from 10,000,000 shares to 20,000,000 shares. Restricted Stock Plan On May 6, 2014, Mid Penn shareholders approved the 2014 Restricted Stock Plan (the “Plan”), which authorized the issuance of awards not exceed, in the aggregate, 100,000 shares of common stock. At the August 26, 2020 annual shareholder meeting, Mid Penn shareholders approved an amendment to the Plan to increase the number of shares of common stock authorized for issuance from 100,000 shares to 200,000 shares. Awards under the Plan are limited to employees and directors of the Corporation, and the recipients are selected by the Compensation Committee of the Board of Directors, to advance the best interest of Mid Penn and its shareholders. Share-based compensation expense relating to restricted stock is recognized on a straight-line basis over the vesting periods of the awards and is a component of salaries and benefits expense. As of September 30, 2020, a total of 83,414 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 38,927 shares were unvested. One hundred shares were forfeited due to a voluntary termination of an employee during the nine months ended September 30, 2020, while no shares were forfeited during the nine months ended September 30, 2019. The Plan shares granted and vested resulted in $104,000 in share-based compensation expense for the three months ended September 30, 2020, while $91,000 of share-based compensation expense was recorded for the three months ended September 30, 2019. Compensation expense related to the Plan was $265,000 for the nine months ended September 30, 2020 and $250,000 for the same period in 2019.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	(1 3 ) Recent Accounting Pronouncements 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 to perform the calculation in advance of the January 1, 2023 adoption date. 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 is effective for public business entities for fiscal years ending after December 15, 2020. Early adoption is permitted. 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 is currently evaluating the impact of this ASU on our current disclosures. The adoption of this standard will result in disclosure changes only and will not impact Mid Penn’s overall financial condition.

COVID-19 Pandemic Implications

COVID-19 Pandemic Implications	9 Months Ended
	Sep. 30, 2020
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. To curtail the spread of the virus, beginning March 17, 2020, Mid Penn temporarily closed all bank branch lobbies, and the branch lobbies have remained closed through September 30, 2020. Our retail employees continue to work providing access to customers through drive-through banking services and night depositories. Services that cannot be performed through drive-through (i.e. business cash orders, loan closings and new account openings) are accommodated in the branches by appointment. 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 was a significant lender under the federal Paycheck Protection Program (“PPP”) which was created when the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was signed into law on March 27, 2020, by President Trump. Asset growth during the first nine months of 2020 included a significant volume of PPP loans processed by Mid Penn, with $613,924,000 of PPP loans still outstanding, net of deferred fees, as of September 30, 2020. The Paycheck Protection Program permitted eligible business entities to apply for loans through a participating financial institution to cover payroll, rent, and other business expenses during the COVID-19 pandemic. 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 vast majority of Mid Penn’s PPP loans have a two-year The SBA provided a processing fee per loan ranging from 1 percent to 5 percent to financial institutions who participated in the PPP, with the amount of such fee pre-determined by the SBA dependent upon the size of each credit. As of September 30, 2020, Mid Penn had received $20,883,000 of nonrefundable loan processing fees related to the loans disbursed as a result of Mid Penn’s participation in the PPP initiative. These fees, which are partially offset by 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. During 2020, Mid Penn had provided loan modifications meeting the CARES Act qualifications to over 1,000 borrowers. Mid Penn remains in communication with each of these borrowers to assess the ongoing credit status of the borrowers, and may make further adjustments to a borrower’s modification at some future time if warranted for the specific situation. As of September 30, 2020, the principal balance of loans remaining in this CARES Act qualifying deferment status totaled $32,851,000, or 1 percent of the total loan portfolio, a significant reduction compared to June 30, 2020, when $444,486,000 of loans, representing 18 percent of the total loan portfolio, were in this deferment status, as most borrowers have returned to regular payment status. Subsequent to September 30, 2020, as more borrowers completed their deferral period, the remaining balances outstanding in deferment under the CARES Act qualifications as of October 26, 2020, totaled $11,804,000 of principal, representing less than 1 percent of the total loan portfolio. 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 2020.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
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 that may be sold in response to liquidity needs, changes in interest rates, resultant prepayment risk, pledging requirements, 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, 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 other-than-temporary impairment 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 On March 27, 2020, in response to the novel coronavirus (“COVID-19”) pandemic, the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was signed into law by President Donald Trump. This legislation created the federal Paycheck Protection Program (“PPP”) which permitted eligible business entities to apply for loans through a participating financial institution to cover payroll, rent, and other business expenses during the COVID-19 pandemic. The PPP loans, which are 100 percent guaranteed by the Small Business Administration (“SBA”), have up to a five-year term to maturity and carry a low interest rate of 1 percent throughout the loan term. The vast majority of Mid Penn’s PPP loans have a two-year Receivables—Nonrefundable Fees and Other Costs and will be amortized to interest and fees on loans and leases on the Consolidated Statements of Income over the life of each respective loan. During the three and nine months ended September 30, 2020, Mid Penn recognized $ and $ 4,954,000 , respectively, of PPP processing fees within interest and fees on loans and leases on the Consolidated Statements of Income. As of September 30, 2020, Mid Penn had $613,924,000 of net PPP loans outstanding ($629,853,000 of gross PPP loans, net of deferred PPP processing fees of $15,929,000) with all of these loans being recorded in the commercial and industrial loan portfolio classification.
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 $83,000 at September 30, 2020 and $80,000 at December 31, 2019. 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. 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. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate. As of September 30, 2020, Mid Penn had $613,924,000 of PPP loans outstanding, net of deferred fees, 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 $295,290,000 and $414,498,000 as of September 30, 2020 and December 31, 2019, 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 September 30, 2020, totaled $210,000 related to a full-service retail banking property to be closed and listed for sale on December 31, 2020. The balance of the bank premises held for sale is included in other assets on the Consolidated Balance Sheet as of September 30, 2020. There were no premises and equipment classified as held for sale as of December 31, 2019. During 2019, Mid Penn sold the land and facility formerly used as a full-service retail banking property. An impairment charge of $105,000 was recorded during the first nine months of 2019 related to this property and is included in other expenses on the Consolidated Statement of Income. Similar impairment charges were not recorded during the nine months ended September 30, 2020.
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 September 30, 2020, Mid Penn had $136,000 of residential real estate held in other real estate owned and $89,000 in loans for which formal foreclosure proceedings were in process. As of December 31, 2019, Mid Penn had $78,000 of residential real estate held in other real estate owned and $84,000 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 $157,000 at September 30, 2020, and $190,000 at December 31, 2019, 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 owns a limited partnership interest in a low-income housing project to construct thirty-seven apartments and common amenities in Dauphin County, Pennsylvania. The total investment in this limited partnership, net of amortization, was $6,872,000 and $7,249,000 on September 30, 2020 and December 31, 2019, 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 commitment is $7,579,000. Investments made to date, and any future payments under this commitment, are paid in installments over the course of the construction and completion phases of the low-income housing facilities. Each installment payment is conditional upon both Mid Penn’s review and approval of the installment payment certificate and continued compliance with the terms of the original partnership agreement. The investment in the limited partnership is reported in other assets on the Consolidated Balance Sheet and is being amortized over a ten-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 $4,607,000 and $5,526,000 at September 30, 2020 and December 31, 2019, respectively. Core deposit amortization expense is reflected in the Consolidated Statements of Income in intangible amortization and was $919,000 and $1,033,000 for the nine months ended September 30, 2020 and 2019, respectively. Core deposit amortization expense was $300,000 and $338,000 for the three months ended September 30, 2020 and 2019, respectively. The core deposit intangible for each respective acquisition (Phoenix Bancorp, Inc. (“Phoenix”) in March 2015; The Scottdale Bank and Trust Company (“Scottdale”) in January 2018; and First Priority Financial Corp. (“First Priority) in July 2018) 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 September 30, 2020 and December 31, 2019, 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 evaluation which was performed as of October 31, 2019 using a qualitative analysis. Changes in economic and operating conditions could result in goodwill impairment in future periods. 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. Subsequent “Step One” goodwill analyses were not performed after the first quarter of 2020 and through September 30, 2020; however, in response to the continued presence of the COVID-19 pandemic event and its impacts on the capital markets and the economy, management reviewed the criteria supporting the “Step One” assessment performed for the first quarter of 2020, including economic projections, anticipated cash flows, and current market data. Mid Penn management determined there were no adverse changes to these criteria and key considerations from this previous assessment, and that no additional events had occurred since this previous assessment. Accordingly, management affirmed its determination that there is no impairment to its goodwill as of September 30, 2020. As the COVID-19 event continues and its implications to the country, the economy, and specifically Mid Penn evolve, management will perform additional updated goodwill evaluations as necessary.
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 (Loss) Income Balance - September 30, 2020 $ (19 ) $ (265 ) $ (284 ) Balance - December 31, 2019 $ (128 ) $ 471 $ 343 During the nine months ended September 30, 2020, the fair value of plan assets in Mid Penn’s defined benefit pension plan was impacted by the economic implications of the COVID-19 pandemic, resulting in a decrease in the fair value of the plan assets and accumulated other comprehensive loss, net of the related income tax benefit, of $721,000 when comparing December 31, 2019 to September 30, 2020.
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 effect of dilutive unvested restricted stock was not material and did not result in a difference, when rounded to the whole cent, between the basic earnings per share compared to the diluted earnings per share for any of the periods presented. 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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net income $ 6,547 $ 4,813 $ 17,198 $ 13,293 Weighted average common shares outstanding (basic) 8,415,252 8,473,080 8,447,417 8,465,249 Effect of dilutive unvested restricted stock grants 3,678 5,638 580 3,051 Weighted average common shares outstanding (diluted) 8,418,930 8,478,718 8,447,997 8,468,300 Basic earnings per common share $ 0.78 $ 0.57 $ 2.04 $ 1.57 Diluted earnings per common share $ 0.78 $ 0.57 $ 2.04 $ 1.57 There were no antidilutive shares at September 30, 2020 and 2019.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2020
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 (Loss) Income Balance - September 30, 2020 $ (19 ) $ (265 ) $ (284 ) Balance - December 31, 2019 $ (128 ) $ 471 $ 343
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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net income $ 6,547 $ 4,813 $ 17,198 $ 13,293 Weighted average common shares outstanding (basic) 8,415,252 8,473,080 8,447,417 8,465,249 Effect of dilutive unvested restricted stock grants 3,678 5,638 580 3,051 Weighted average common shares outstanding (diluted) 8,418,930 8,478,718 8,447,997 8,468,300 Basic earnings per common share $ 0.78 $ 0.57 $ 2.04 $ 1.57 Diluted earnings per common share $ 0.78 $ 0.57 $ 2.04 $ 1.57

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Securities Financing Transactions Disclosures [Abstract]
Unrealized Gain (Loss) on Investments	The amortized cost, fair value, and unrealized gains and losses on investment securities at September 30, 2020 and December 31, 2019 are as follows: (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value September 30, 2020 Available-for-sale debt securities: Mortgage-backed U.S. government agencies $ 2 $ — $ — $ 2 Corporate debt securities 8,359 2 26 8,335 Total available-for-sale debt securities 8,361 2 26 8,337 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 20,003 $ 138 $ — $ 20,141 Mortgage-backed U.S. government agencies 45,793 1,005 21 46,777 State and political subdivision obligations 64,151 2,952 19 67,084 Corporate debt securities 10,527 196 17 10,706 Total held-to-maturity debt securities 140,474 4,291 57 144,708 Total $ 148,835 $ 4,293 $ 83 $ 153,045 (Dollars in thousands) Amortized Unrealized Unrealized Fair Cost Gains Losses Value December 31, 2019 Available-for-sale debt securities: U.S. government agencies $ 22,894 $ 6 $ 70 $ 22,830 Mortgage-backed U.S. government agencies 12,996 7 113 12,890 State and political subdivision obligations 30 — — 30 Corporate debt securities 1,250 9 — 1,259 Total available-for-sale debt securities 37,170 22 183 37,009 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 50,210 $ 46 $ 220 $ 50,036 Mortgage-backed U.S. government agencies 42,098 95 102 42,091 State and political subdivision obligations 44,169 1,193 13 45,349 Total held-to-maturity debt securities 136,477 1,334 335 137,476 Total $ 173,647 $ 1,356 $ 518 $ 174,485
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 September 30, 2020 and December 31, 2019. (Dollars in thousands) Less Than 12 Months 12 Months or More Total Number Number Number of Fair Unrealized of Fair Unrealized of Fair Unrealized September 30, 2020 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale debt securities: Corporate debt securities 3 $ 4,048 $ 26 0 $ — $ — 3 $ 4,048 $ 26 Total temporarily impaired available-for-sale debt securities 3 $ 4,048 $ 26 0 $ — $ — 3 $ 4,048 $ 26 Held-to-maturity debt securities: Mortgage-backed U.S. government agencies 4 $ 6,730 $ 21 0 $ — $ — 4 $ 6,730 $ 21 State and political subdivision obligations 7 2,515 19 0 — — 7 2,515 19 Corporate debt securities 6 5,420 17 0 — — 6 5,420 17 Total temporarily impaired held-to-maturity debt securities 17 $ 14,665 $ 57 0 $ — $ — 17 $ 14,665 $ 57 Total 20 $ 18,713 $ 83 0 $ — $ — 20 $ 18,713 $ 83 (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, 2019 Securities Value Losses Securities Value Losses Securities Value Losses Available-for-sale securities: U.S. government agencies 4 $ 4,652 $ 24 7 $ 11,982 $ 46 11 $ 16,634 $ 70 Mortgage-backed U.S. government agencies 1 1,643 4 14 10,603 109 15 12,246 113 Total temporarily impaired available-for-sale securities 5 $ 6,295 $ 28 21 $ 22,585 $ 155 26 $ 28,880 $ 183 Held-to-maturity securities: U.S. Treasury and U.S. government agencies 18 $ 29,024 $ 219 1 $ 2,999 $ 1 19 $ 32,023 $ 220 Mortgage-backed U.S. government agencies 6 8,445 35 13 11,050 67 19 19,495 102 State and political subdivision obligations 3 1,383 13 0 — — 3 1,383 13 Total temporarily impaired held to maturity securities 27 $ 38,852 $ 267 14 $ 14,049 $ 68 41 $ 52,901 $ 335 Total 32 $ 45,147 $ 295 35 $ 36,634 $ 223 67 $ 81,781 $ 518
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 and nine months ended September 30, 2020 and 2019 are shown in the table below. (Dollars in thousands) Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Realized gains $ 150 $ 64 $ 405 $ 133 Realized losses — (18 ) (12 ) (63 ) Net gains $ 150 $ 46 $ 393 $ 70
Investments Classified by Contractual Maturity Date	The table below illustrates the maturity distribution of investment securities at amortized cost and fair value as of September 30, 2020. (Dollars in thousands) Available-for-sale Held-to-maturity Amortized Fair Amortized Fair September 30, 2020 Cost Value Cost Value Due in 1 year or less $ — $ — $ 3,159 $ 3,176 Due after 1 year but within 5 years 2,250 2,250 26,249 27,288 Due after 5 years but within 10 years 6,109 6,085 62,051 64,196 Due after 10 years — — 3,222 3,271 8,359 8,335 94,681 97,931 Mortgage-backed securities 2 2 45,793 46,777 $ 8,361 $ 8,337 $ 140,474 $ 144,708

Loans and Allowance for Loan _2

Loans and Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2020
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Type of Loan Portfolio Summarized by the Aggregate Risk Rating	The types of loans in Mid Penn’s portfolio, summarized by those rated as “pass” (net of deferred fees and costs of $16,536,000 as of September 30, 2020 and $1,081,000 as of December 31, 2019), and the loans classified as “special mention” and “substandard” within Mid Penn’s internal risk rating system as of September 30, 2020 and December 31, 2019, are as follows: (Dollars in thousands) Special September 30, 2020 Pass Mention Substandard Total Commercial and industrial $ 956,097 $ 9,657 $ 3,121 $ 968,875 Commercial real estate 1,004,999 2,406 14,013 1,021,418 Commercial real estate - construction 238,176 — 32 238,208 Residential mortgage 214,177 53 1,359 215,589 Home equity 68,002 5 2,393 70,400 Consumer 7,337 — — 7,337 $ 2,488,788 $ 12,121 $ 20,918 $ 2,521,827 (Dollars in thousands) Special December 31, 2019 Pass Mention Substandard Total Commercial and industrial $ 326,573 $ 9,558 $ 3,016 $ 339,147 Commercial real estate 913,001 2,426 13,711 929,138 Commercial real estate - construction 181,650 — 40 181,690 Residential mortgage 235,252 55 1,417 236,724 Home equity 68,224 — 47 68,271 Consumer 7,786 — — 7,786 $ 1,732,486 $ 12,039 $ 18,231 $ 1,762,756
Impaired Loans by Loan Portfolio Class	Impaired loans by loan portfolio class as of September 30, 2020 and December 31, 2019 are summarized as follows: September 30, 2020 December 31, 2019 (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 $ 859 $ 891 $ — $ 890 $ 890 $ — Commercial real estate 7,074 7,425 — 7,973 8,366 — Commercial real estate - construction 32 34 — 40 61 — Residential mortgage 834 859 — 817 838 — Home equity 2,386 2,417 — 25 27 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ — $ 3 $ 68 $ — Commercial real estate 1,426 1,698 — 1,423 1,708 — Commercial real estate - construction — — — — — — Residential mortgage 342 585 — 381 578 — Home equity — 14 — 1 5 — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 53 $ 73 $ 41 $ — $ — $ — Commercial real estate 360 405 141 338 380 166 Commercial real estate - construction — — — — — — Residential mortgage — — — — — — Home equity — — — — — — Consumer — — — — — — Total Impaired Loans: Commercial and industrial $ 912 $ 964 $ 41 $ 893 $ 958 $ — Commercial real estate 8,860 9,528 141 9,734 10,454 166 Commercial real estate - construction 32 34 — 40 61 — Residential mortgage 1,176 1,444 — 1,198 1,416 — Home equity 2,386 2,431 — 26 32 — 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 and nine months ended September 30, 2020 and 2019 are summarized as follows: Three Months Ended September 30, 2020 September 30, 2019 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 932 $ — $ — $ — Commercial real estate 7,171 5 1,917 — Commercial real estate - construction 32 — 40 4 Residential mortgage 805 6 889 7 Home equity 2,396 — 27 — Consumer — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ — $ — $ 11 $ — Commercial real estate 1,428 — 1,630 — Commercial real estate - construction — — — — Residential mortgage 347 — 1,055 — Home equity — — 4 — Consumer — — — — With an allowance recorded: Commercial and industrial $ 130 $ — $ 38 $ — Commercial real estate 560 — 617 — Commercial real estate - construction — — — — Residential mortgage — — — — Home equity — — — — Consumer — — — — Total Impaired Loans: Commercial and industrial $ 1,062 $ — $ 49 $ — Commercial real estate 9,159 5 4,164 — Commercial real estate - construction 32 — 40 4 Residential mortgage 1,152 6 1,944 7 Home equity 2,396 — 31 — Consumer — — — — Nine Months Ended September 30, 2020 September 30, 2019 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ 911 $ — $ — $ — Commercial real estate 7,325 5 2,697 11 Commercial real estate - construction 36 — 40 — Residential mortgage 794 19 1,151 21 Home equity 1,210 — 38 — Consumer — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ 1 $ — $ 22 $ — Commercial real estate 1,423 — 1,602 — Commercial real estate - construction — — — — Residential mortgage 361 — 1,152 — Home equity 1 — 4 — Consumer — — — — With an allowance recorded: Commercial and industrial $ 67 $ — $ 1,202 $ 3 Commercial real estate 530 — 633 — Commercial real estate - construction — — 183 — Residential mortgage — — — — Home equity — — — — Consumer — — — — Total Impaired Loans: Commercial and industrial $ 979 $ — $ 1,224 $ 3 Commercial real estate 9,278 5 4,932 11 Commercial real estate - construction 36 — 223 — Residential mortgage 1,155 19 2,303 21 Home equity 1,211 — 42 — 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 September 30, 2020 and December 31, 2019 are summarized as follows: (Dollars in thousands) September 30, 2020 December 31, 2019 Commercial and industrial $ 913 $ 894 Commercial real estate 8,859 9,800 Commercial real estate - construction 32 40 Residential mortgage 706 711 Home equity 2,386 26 $ 12,896 $ 11,471
Loan Portfolio Summarized by the Past Due Status	The classes of the loan portfolio summarized by the past due status as of September 30, 2020 and December 31, 2019 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 September 30, 2020 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ — $ 1,490 $ 866 $ 2,356 $ 966,519 $ 968,875 $ — Commercial real estate — 1,029 6,842 7,871 1,012,121 1,019,992 — Commercial real estate - construction — — — — 238,208 238,208 — Residential mortgage — 2 328 330 214,917 215,247 — Home equity — 16 2,364 2,380 68,020 70,400 — Consumer 3 1 — 4 7,333 7,337 — Loans acquired with credit deterioration: Commercial and industrial — — — — — — — Commercial real estate — — 1,417 1,417 9 1,426 — Commercial real estate - construction — — — — — — — Residential mortgage — — 182 182 160 342 — Home equity — — — — — — — Consumer — — — — — — — Total $ 3 $ 2,538 $ 11,999 $ 14,540 $ 2,507,287 $ 2,521,827 $ — Loans (Dollars in thousands) 30-59 60-89 Greater Receivable > Days Past Days Past than 90 Total Past 90 Days and December 31, 2019 Due Due Days Due Current Total Loans Accruing Commercial and industrial $ — $ 1,059 $ 890 $ 1,949 $ 337,195 $ 339,144 $ — Commercial real estate 1,298 11 7,819 9,128 918,587 927,715 — Commercial real estate - construction — — — — 181,690 181,690 — Residential mortgage 145 — 326 471 235,872 236,343 — Home equity 34 — — 34 68,236 68,270 — Consumer 5 3 — 8 7,778 7,786 — Loans acquired with credit deterioration: Commercial and industrial — — 3 3 — 3 — Commercial real estate 16 473 934 1,423 — 1,423 — Commercial real estate - construction — — — — — — — Residential mortgage 5 — 203 208 173 381 — Home equity — — — — 1 1 — Consumer — — — — — — — Total $ 1,503 $ 1,546 $ 10,175 $ 13,224 $ 1,749,532 $ 1,762,756 $ —
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, September 30, 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, July 1, 2020 $ 2,786 $ 7,241 $ 65 $ 427 $ 517 $ 2 $ 29 $ 11,067 Charge-offs — — — (4 ) — (4 ) — (8 ) Recoveries — — — — — 11 — 11 Provisions (credits) 138 529 (4 ) 47 14 (7 ) 383 1,100 Ending balance, September 30, 2020 $ 2,924 $ 7,770 $ 61 $ 470 $ 531 $ 2 $ 412 $ 12,170 (Dollars in thousands) As of, and for the nine months ended, September 30, 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 (45 ) — (7 ) (4 ) — (22 ) — (78 ) Recoveries 2 1 2 3 1 24 — 33 Provisions (credits) 626 1,510 15 54 88 (2 ) 409 2,700 Ending balance, September 30, 2020 2,924 7,770 61 470 531 2 412 12,170 Individually evaluated for impairment 41 141 — — — — — 182 Ending balance: Collectively evaluated for impairment $ 2,883 $ 7,629 $ 61 $ 470 $ 531 $ 2 $ 412 $ 11,988 Loans receivables: Ending balance $ 968,875 $ 1,021,418 $ 238,208 $ 215,589 $ 70,400 $ 7,337 $ — $ 2,521,827 Ending balance: individually evaluated for impairment 912 7,434 32 834 2,386 — — 11,598 Ending balance: acquired with credit deterioration — 1,426 — 342 — — — 1,768 Ending balance: collectively evaluated for impairment $ 967,963 $ 1,012,558 $ 238,176 $ 214,413 $ 68,014 $ 7,337 $ — $ 2,508,461 (Dollars in thousands) December 31, 2019 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 $ 2,341 $ 6,259 $ 51 $ 417 $ 442 $ 2 $ 3 $ 9,515 Ending balance: individually evaluated for impairment — 166 — — — — — 166 Ending balance: collectively evaluated for impairment $ 2,341 $ 6,093 $ 51 $ 417 $ 442 $ 2 $ 3 $ 9,349 Loans receivable: Ending balance $ 339,147 $ 929,138 $ 181,690 $ 236,724 $ 68,271 $ 7,786 $ — $ 1,762,756 Ending balance: individually evaluated for impairment 890 8,311 40 817 25 — — 10,083 Ending balance: acquired with credit deterioration 3 1,423 — 381 1 — — 1,808 Ending balance: collectively evaluated for impairment $ 338,254 $ 919,404 $ 181,650 $ 235,526 $ 68,245 $ 7,786 $ — $ 1,750,865 (Dollars in thousands) As of, and for the three months ended, September 30, 2019 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, July 1, 2019 $ 2,448 $ 5,312 $ 45 $ 476 $ 482 $ 7 $ 1 $ 8,771 Charge-offs (12 ) (42 ) — (3 ) — (9 ) — (66 ) Recoveries 1 41 — 2 1 1 — 46 Provisions (credits) 6 544 1 (7 ) 13 6 2 565 Ending balance, September 30, 2019 $ 2,443 $ 5,855 $ 46 $ 468 $ 496 $ 5 $ 3 $ 9,316 (Dollars in thousands) As of, and for the nine months ended, September 30, 2019 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, 2019 2,391 4,703 75 453 528 7 240 $ 8,397 Charge-offs (217 ) (53 ) (40 ) (3 ) — (57 ) — (370 ) Recoveries 44 74 — 2 2 12 — 134 Provisions (credits) 225 1,131 11 16 (34 ) 43 (237 ) 1,155 Ending balance, September 30, 2019 2,443 5,855 46 468 496 5 3 9,316 Individually evaluated for impairment — 336 — — — — — 336 Ending balance: collectively evaluated for impairment $ 2,443 $ 5,519 $ 46 $ 468 $ 496 $ 5 $ 3 $ 8,980 Loans receivables: Ending balance $ 320,400 $ 892,060 $ 177,151 $ 243,729 $ 69,240 $ 7,854 $ — $ 1,710,434 Ending balance: individually evaluated for impairment — 2,324 40 881 26 — — 3,271 Ending balance: acquired with credit deterioration 5 1,643 — 494 4 — — 2,146 Ending balance: collectively evaluated for impairment $ 320,395 $ 888,093 $ 177,111 $ 242,354 $ 69,210 $ 7,854 $ — $ 1,705,017
Troubled Debt Restructurings	The recorded investments in troubled debt restructured loans at September 30, 2020 and December 31, 2019 are as follows: (Dollars in thousands) Pre-Modification Post-Modification September 30, 2020 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 8 $ 8 $ 7 Commercial real estate 1,214 1,115 409 Commercial real estate - construction 40 40 31 Residential mortgage 689 687 481 $ 1,951 $ 1,850 $ 928 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2019 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 3 $ 3 $ 3 Commercial real estate 2,562 2,463 1,705 Commercial real estate - construction 40 40 40 Residential mortgage 677 675 490 $ 3,282 $ 3,181 $ 2,238
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 and nine months ended September 30, 2020 . (Dollars in thousands) Three Months Ended September 30, 2020 2019 Accretable yield, beginning of period $ 56 $ 197 Accretable yield amortized to interest income (7 ) (55 ) Accretable yield, end of period $ 49 $ 142 (Dollars in thousands) Nine Months Ended September 30, 2020 2019 Accretable yield, beginning of period $ 89 $ 309 Accretable yield amortized to interest income (40 ) (167 ) Accretable yield, end of period $ 49 $ 142

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 and December 31, 2019. (Dollars in thousands) September 30, 2020 December 31, 2019 Operating Leases Finance Lease Operating Leases Finance Lease Right of use asset $ 10,173 $ 3,312 $ 11,442 $ 3,447 Lease liability $ 11,212 $ 3,488 $ 12,544 $ 3,551 Weighted average remaining lease term (in years) 8.30 18.42 8.64 19.17 Weighted average discount rate 3.35 % 3.81 % 3.33 % 3.81 %
Summary of Lease Costs	A summary of lease costs during the three and nine months ended September 30, 2020 and 2019 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 September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Finance lease cost: Amortization of right-of-use asset $ 45 $ 45 $ 135 $ 105 Interest expense on lease liability 33 34 100 80 Total finance lease cost 78 79 235 185 Operating lease cost 504 515 1,537 1,545 Short-term and equipment lease cost 10 11 31 42 Variable lease cost — — — — Sublease income (3 ) (6 ) (13 ) (18 ) Total lease costs $ 589 $ 599 $ 1,790 $ 1,754
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) Nine Months Ended September 30, 2020 September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 100 $ 80 Operating cash flows from operating leases 1,584 1,633 Financing cash flows from finance leases 62 26
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) September 30, 2020 Operating Leases Finance Lease Lease payments due: Within one year $ 521 $ 54 After one but within two years 1,868 216 After two but within three years 1,824 217 After three but within four years 1,572 217 After four but within five years 1,512 252 After five years 5,584 3,992 Total undiscounted cash flows 12,881 4,948 Discount on cash flows (1,669 ) (1,460 ) Total lease liability $ 11,212 $ 3,488

Loan-Level Interest Rate Swaps

Loan-Level Interest Rate Swaps (Tables)	9 Months Ended
	Sep. 30, 2020
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) September 30, 2020 December 31, 2019 Interest Rate Swap Contracts - Commercial Loans: Fair Value (a) $ 213 $ — Notional Amount 8,826 — Cash Collateral Posted (b) 250 — (a) Included in other assets 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) September 30, 2020 December 31, 2019 Interest Rate Swap Contracts - Commercial Loans: Gross amounts recognized $ 213 $ — Gross amounts offset 213 — Net Amounts Presented in the Consolidated Balance Sheets — — Gross amounts not offset: Financial instruments — — Cash collateral 250 — Net Amounts $ 250 $ —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: September 30, 2020 (Level 1) (Level 2) (Level 3) Available-for-sale securities: Mortgage-backed U.S. government agencies $ 2 $ — $ 2 $ — Corporate debt securities 8,335 — 8,335 — Other assets: Equity securities 1,522 1,522 — — Interest rate swap agreements 213 — 213 — Total $ 10,072 $ 1,522 $ 8,550 $ — Fair value measurements at December 31, 2019 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2019 (Level 1) (Level 2) (Level 3) Available-for-sale securities: U.S. government agencies $ 22,830 $ — $ 22,830 $ — Mortgage-backed U.S. government agencies 12,890 — 12,890 — State and political subdivision obligations 30 — 30 — Corporate debt securities 1,259 — 1,259 — Other assets: Equity securities 507 507 — — Total $ 37,516 $ 507 $ 37,009 $ —
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 September 30, 2020 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: September 30, 2020 (Level 1) (Level 2) (Level 3) Impaired Loans $ 398 $ — $ — $ 398 Foreclosed Assets Held for Sale 121 — — 121 Fair value measurements at December 31, 2019 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2019 (Level 1) (Level 2) (Level 3) Impaired Loans $ 271 $ — $ — $ 271 Foreclosed Assets Held for Sale 122 — — 122
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 September 30, 2020 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 398 Appraisal of collateral (a), (b) Appraisal adjustments (b) 25% - 88% 34% Foreclosed Assets Held for Sale 121 Appraisal of collateral (a), (b) Appraisal adjustments (b) 27% - 27% 27% (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements December 31, 2019 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 271 Appraisal of collateral (a), (b) Appraisal adjustments (b) 26% - 85% 36% Foreclosed Assets Held for Sale 122 Appraisal of collateral (a), (b) Appraisal adjustments (b) 8% - 27% 16% (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 September 30, 2020 and December 31, 2019. (Dollars in thousands) September 30, 2020 December 31, 2019 Carrying Fair Carrying Fair Value Value Value Value Financial assets: Cash and cash equivalents $ 195,357 $ 195,357 $ 139,030 $ 139,030 Available-for-sale investment securities 8,337 8,337 37,009 37,009 Held-to-maturity investment securities 140,474 144,708 136,477 137,476 Equity securities 1,522 1,522 507 507 Loans held for sale 30,938 31,586 8,422 8,630 Net loans and leases 2,509,657 2,596,329 1,753,241 1,789,402 Restricted investment in bank stocks 7,726 7,726 4,902 4,902 Accrued interest receivable 14,663 14,663 2,810 2,810 Interest rate swap agreements 213 213 — — Financial liabilities: Deposits $ 2,456,398 2,465,117 $ 1,912,394 $ 1,916,624 Short-term borrowings 203,842 203,842 — — Long-term debt (a) 71,711 71,243 29,352 30,216 Subordinated debt 41,972 40,352 27,070 25,273 Accrued interest payable 2,840 2,840 2,208 2,208 (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 September 30, 2020 and December 31, 2019. 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 September 30, 2020 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 140,474 $ 144,708 $ — $ 144,708 $ — Loans held for sale 30,938 31,586 — 31,586 — Net loans and leases 2,509,657 2,596,329 — — 2,596,329 Financial instruments - liabilities Deposits $ 2,456,398 $ 2,465,117 $ — $ 2,465,117 $ — Long-term debt (a) 71,711 71,243 — 71,243 — Subordinated debt 41,972 40,352 — 40,352 — 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, 2019 Amount Fair Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 136,477 $ 137,476 $ — $ 137,476 $ — Loans held for sale 8,422 8,630 — 8,630 — Net loans and leases 1,753,241 1,789,402 — — 1,789,402 Financial instruments - liabilities Deposits $ 1,912,394 $ 1,916,624 $ — $ 1,916,624 $ — Long-term debt (a) 29,352 30,216 — 30,216 — Subordinated debt 27,070 25,273 — 25,273 — (a) Long-term debt excludes finance lease obligations.

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30 , 2020 and December 31, 2019. (Dollars in thousands) September 30, 2020 December 31, 2019 FHLB fixed rate instruments: Due June 2020, 1.72% $ — $ 2,000 Due July 2020, 2.45% — 5,000 Due August 2020, 3.05% — 5,000 Due September 2020, 2.38% — 2,500 Due October 2020, 3.06% — 5,000 Due November 2020, 2.32% — 3,000 Due December 2020, 1.78% — 2,000 Due December 2020, 2.31% — 3,000 Due April 2022, 0.86% 70,000 — Due August 2026, 4.80% 1,667 1,846 Due February 2027, 6.71% 44 47 Less: fair value adjustments on debt assumed in acquisitions — (41 ) Total FHLB fixed rate instruments 71,711 29,352 Lease obligations included in long-term debt 3,488 3,551 Total long-term debt $ 75,199 $ 32,903

Defined Benefit Plans (Tables)

Defined Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2020
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 September 30, (Dollars in thousands) Pension Benefits Other Benefits 2020 2019 2020 2019 Service cost $ 32 $ 36 $ 1 $ - Interest cost 53 65 3 5 Expected return on plan assets (68 ) (63 ) — — Accretion of prior service cost — — (5 ) (5 ) Amortization of net gain — (15 ) (1 ) (1 ) Settlement loss (gain) — — — — Net periodic benefit expense (income) $ 17 $ 23 $ (2 ) $ (1 ) Nine Months Ended September 30, (Dollars in thousands) Pension Benefits Other Benefits 2020 2019 2020 2019 Service cost $ 96 $ 107 $ 2 $ 2 Interest cost 158 194 9 13 Expected return on plan assets (205 ) (190 ) — — Accretion of prior service cost — — (15 ) (15 ) Amortization of net gain — (44 ) (1 ) (3 ) Settlement loss (gain) 22 (37 ) — — Net periodic benefit expense (income) $ 71 $ 30 $ (5 ) $ (3 ) 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, amortization (accretion) of prior service cost, and amortization of (gain) loss are reported as a component of other income.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)Apartmentshares	Sep. 30, 2019USD ($)shares	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Jan. 02, 2019USD ($)	Jan. 01, 2019USD ($)Branch
Loans and leases receivable, net, carrying amount		$ 2,509,657,000		$ 2,509,657,000			$ 1,753,241,000
Loans and leases receivable, gross, carrying amount		2,521,827,000	$ 1,710,434,000	2,521,827,000	$ 1,710,434,000		1,762,756,000
Loans and leases, net of unearned interest		295,290,000		295,290,000			414,498,000
Bank premises and equipment held for sale		210,000		$ 210,000			0
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 September 30, 2020, totaled $210,000 related to a full-service retail banking property to be closed and listed for sale on December 31, 2020. The balance of the bank premises held for sale is included in other assets on the Consolidated Balance Sheet as of September 30, 2020. There were no premises and equipment classified as held for sale as of December 31, 2019.
Residential real estate held in other real estate owned		136,000		$ 136,000			78,000
Foreclosure proceedings in process		89,000		89,000			84,000
Operating lease right of use asset		10,173,000		10,173,000			11,442,000
Operating lease liability		11,212,000		11,212,000			12,544,000
Retained earnings		63,099,000		63,099,000			50,891,000
Carrying value of investment in limited partnership		157,000		$ 157,000			$ 190,000
Number of apartments under the project | Apartment				37
Limited partner capital contribution commitment		7,579,000		$ 7,579,000
Project investment amortization period				10 years			10 years
Total LIHTCs amount awarded for the project				$ 861,000
Amortization expense		317,000	355,000	966,000	$ 1,078,000
Goodwill		62,840,000		62,840,000			$ 62,840,000
Goodwill, Impairment Loss	$ 0			0
Decrease in fair value of plan assets				(721,000)
Accumulated other comprehensive loss, net of related income tax benefit				$ (721,000)
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		4,607,000		4,607,000			5,526,000
Amortization expense		300,000	338,000	$ 919,000	$ 1,033,000
Core Deposit Intangible, Amortization Period				10 years
Impairment of core deposit intangible				$ 0
Intangible assets, growth recognized				$ 544,003,000
Finite Lived Intangible Assets Growth Percentage				28.00%
Scenario Forecast [Member]
Project investment amortization period						10 years
Total LIHTCs amount awarded for the project						$ 8,613,000
Annual LIHTCs amount under the housing project						$ 861,000
Other Assets [Member]
Carrying value of investment in limited partnership		6,872,000		$ 6,872,000			7,249,000
Non Interest Expense [Member]
Asset held for sale, impairment charge				0	105,000
Reserve for Off-balance Sheet Activities [Member]
Valuation allowances and reserves, balance		$ 83,000		$ 83,000			80,000
Maximum [Member]
Non-residential consumer loans charged off on contractual basis in event of bankruptcy, in period		120 days		120 days
Commercial Portfolio [Member]
Loan terms				1 year
Loan to value ratio		80.00%		80.00%
Residential Portfolio [Member] | Maximum [Member]
Loan terms				30 years
Loan to value ratio		100.00%		100.00%
Loan to value ratio, exposure after private mortgage insurance				85.00%
Small Business Administration [Member] | PPP Loans [Member]
Loan guarantee description				The PPP loans, which are 100 percent guaranteed by the Small Business Administration (“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				$ 20,883,000
Loan processing fees		$ 2,583,000		4,954,000
Loans and leases receivable, net, carrying amount		613,924,000		613,924,000
Loans and leases receivable, gross, carrying amount		629,853,000		629,853,000
Deferred loan processing fees		15,929,000		15,929,000
Loss reserve				$ 0
Small Business Administration [Member] | Maximum [Member] | PPP Loans [Member]
Loans maturity term				2 years
Processing fee percentage				5.00%
Small Business Administration [Member] | Minimum [Member] | PPP Loans [Member]
Processing fee percentage				1.00%
ASU 2016-01 [Member]
Preferred stock, fair value		1,006,000		$ 1,006,000
ASU 842 [Member]
Operating lease right of use asset									$ 11,661,000
Operating lease liability									$ 12,866,000
Number of retail branch location | Branch									2
ASU 842 [Member] | Adjustment [Member]
Retained earnings								$ 316,000
Equity Securities [Member]
Equity securities, fair value		1,522,000		1,522,000			507,000
Equity Securities [Member] | ASU 2016-01 [Member]
Equity securities, fair value		516,000		516,000			$ 507,000
Equity securities sold		$ 0	$ 0	$ 0	$ 0
Home equity lines of credit [Member] | Maximum [Member]
Loan terms				20 years
Loan to value ratio		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	Sep. 30, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Unrealized Loss on Securities	$ (19)	$ (128)
Defined Benefit Plans	(265)	471
Accumulated Other Comprehensive (Loss) Income	$ (284)	$ 343

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						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 6,547	$ 6,833	$ 3,818	$ 4,813	$ 4,403	$ 4,077	$ 17,198	$ 13,293
Weighted average common shares outstanding (basic)	8,415,252			8,473,080			8,447,417	8,465,249
Effect of dilutive unvested restricted stock grants	3,678			5,638			580	3,051
Weighted average common shares outstanding (diluted)	8,418,930			8,478,718			8,447,997	8,468,300
Basic earnings per common share	$ 0.78			$ 0.57			$ 2.04	$ 1.57
Diluted earnings per common share	$ 0.78			$ 0.57			$ 2.04	$ 1.57

Investment Securities (Unrealiz

Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	$ 8,361	$ 37,170
Available-for-sale debt securities, Unrealized Gains	2	22
Available-for-sale debt securities, Unrealized Losses	26	183
Available-for-sale debt securities, Fair Value	8,337	37,009
Held-to-maturity debt securities, Amortized Cost	140,474	136,477
Held-to-maturity debt securities, Unrealized Gains	4,291	1,334
Held-to-maturity debt securities, Unrealized Losses	57	335
Held-to-maturity debt securities, Fair Value	144,708	137,476
Available-for-sale securities and Held-to-maturity debt securities, Amortized Cost	148,835	173,647
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Gains	4,293	1,356
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Losses	83	518
Available-for-sale securities and Held-to-maturity debt securities, Fair Value	153,045	174,485
U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost		22,894
Available-for-sale debt securities, Unrealized Gains		6
Available-for-sale debt securities, Unrealized Losses		70
Available-for-sale debt securities, Fair Value		22,830
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Held-to-maturity debt securities, Amortized Cost	20,003	50,210
Held-to-maturity debt securities, Unrealized Gains	138	46
Held-to-maturity debt securities, Unrealized Losses		220
Held-to-maturity debt securities, Fair Value	20,141	50,036
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	2	12,996
Available-for-sale debt securities, Unrealized Gains		7
Available-for-sale debt securities, Unrealized Losses		113
Available-for-sale debt securities, Fair Value	2	12,890
Held-to-maturity debt securities, Amortized Cost	45,793	42,098
Held-to-maturity debt securities, Unrealized Gains	1,005	95
Held-to-maturity debt securities, Unrealized Losses	21	102
Held-to-maturity debt securities, Fair Value	46,777	42,091
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost		30
Available-for-sale debt securities, Fair Value		30
Held-to-maturity debt securities, Amortized Cost	64,151	44,169
Held-to-maturity debt securities, Unrealized Gains	2,952	1,193
Held-to-maturity debt securities, Unrealized Losses	19	13
Held-to-maturity debt securities, Fair Value	67,084	45,349
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	8,359	1,250
Available-for-sale debt securities, Unrealized Gains	2	9
Available-for-sale debt securities, Unrealized Losses	26
Available-for-sale debt securities, Fair Value	8,335	$ 1,259
Held-to-maturity debt securities, Amortized Cost	10,527
Held-to-maturity debt securities, Unrealized Gains	196
Held-to-maturity debt securities, Unrealized Losses	17
Held-to-maturity debt securities, Fair Value	$ 10,706

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 118,143,000	$ 147,283,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List]	us-gaap:CollateralPledgedMember	us-gaap:CollateralPledgedMember
FHLB [Member]
Schedule of Investments [Line Items]
Letter of credit outstanding, amount	$ 306,551,000	$ 169,051,000

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	Sep. 30, 2020USD ($)security	Dec. 31, 2019USD ($)security
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	3	5
Available-for-sale securities, Less than 12 Months: Fair Value	$ 4,048	$ 6,295
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 26	$ 28
Available-for-sale securities, 12 Months or More: Number of Securities | security	0	21
Available-for-sale securities, 12 Months or More: Fair Value		$ 22,585
Available-for-sale securities, 12 Months or More: Unrealized Losses		$ 155
Available-for-sale securities, Total: Number of Securities | security	3	26
Available-for-sale securities, Total: Fair Value	$ 4,048	$ 28,880
Available-for-sale securities, Total: Unrealized Losses	$ 26	$ 183
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	17	27
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 14,665	$ 38,852
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 57	$ 267
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	14
Held-to-maturity securities, 12 Months or More: Fair Value		$ 14,049
Held-to-maturity securities, 12 Months or More: Unrealized Losses		$ 68
Held-to-maturity securities, Total: Number of Securities | security	17	41
Held-to-maturity securities, Total: Fair Value	$ 14,665	$ 52,901
Held-to-maturity securities, Total: Unrealized Losses	$ 57	$ 335
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security	20	32
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value	$ 18,713	$ 45,147
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 83	$ 295
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security	0	35
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Fair Value		$ 36,634
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Unrealized Losses		$ 223
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security	20	67
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value	$ 18,713	$ 81,781
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses	$ 83	$ 518
U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security		4
Available-for-sale securities, Less than 12 Months: Fair Value		$ 4,652
Available-for-sale securities, Less than 12 Months: Unrealized Losses		$ 24
Available-for-sale securities, 12 Months or More: Number of Securities | security		7
Available-for-sale securities, 12 Months or More: Fair Value		$ 11,982
Available-for-sale securities, 12 Months or More: Unrealized Losses		$ 46
Available-for-sale securities, Total: Number of Securities | security		11
Available-for-sale securities, Total: Fair Value		$ 16,634
Available-for-sale securities, Total: Unrealized Losses		$ 70
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		18
Held-to-maturity securities, Less than 12 Months: Fair Value		$ 29,024
Held-to-maturity securities, Less than 12 Months: Unrealized Losses		$ 219
Held-to-maturity securities, 12 Months or More: Number of Securities | security		1
Held-to-maturity securities, 12 Months or More: Fair Value		$ 2,999
Held-to-maturity securities, 12 Months or More: Unrealized Losses		$ 1
Held-to-maturity securities, Total: Number of Securities | security		19
Held-to-maturity securities, Total: Fair Value		$ 32,023
Held-to-maturity securities, Total: Unrealized Losses		$ 220
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	3
Available-for-sale securities, Less than 12 Months: Fair Value	$ 4,048
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 26
Available-for-sale securities, 12 Months or More: Number of Securities | security	0
Available-for-sale securities, Total: Number of Securities | security	3
Available-for-sale securities, Total: Fair Value	$ 4,048
Available-for-sale securities, Total: Unrealized Losses	$ 26
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	6
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 5,420
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 17
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0
Held-to-maturity securities, Total: Number of Securities | security	6
Held-to-maturity securities, Total: Fair Value	$ 5,420
Held-to-maturity securities, Total: Unrealized Losses	$ 17
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security		1
Available-for-sale securities, Less than 12 Months: Fair Value		$ 1,643
Available-for-sale securities, Less than 12 Months: Unrealized Losses		$ 4
Available-for-sale securities, 12 Months or More: Number of Securities | security		14
Available-for-sale securities, 12 Months or More: Fair Value		$ 10,603
Available-for-sale securities, 12 Months or More: Unrealized Losses		$ 109
Available-for-sale securities, Total: Number of Securities | security		15
Available-for-sale securities, Total: Fair Value		$ 12,246
Available-for-sale securities, Total: Unrealized Losses		$ 113
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	4	6
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 6,730	$ 8,445
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 21	$ 35
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	13
Held-to-maturity securities, 12 Months or More: Fair Value		$ 11,050
Held-to-maturity securities, 12 Months or More: Unrealized Losses		$ 67
Held-to-maturity securities, Total: Number of Securities | security	4	19
Held-to-maturity securities, Total: Fair Value	$ 6,730	$ 19,495
Held-to-maturity securities, Total: Unrealized Losses	$ 21	$ 102
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	7	3
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 2,515	$ 1,383
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 19	$ 13
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	0
Held-to-maturity securities, Total: Number of Securities | security	7	3
Held-to-maturity securities, Total: Fair Value	$ 2,515	$ 1,383
Held-to-maturity securities, Total: Unrealized Losses	$ 19	$ 13

Investment Securities (Schedu_2

Investment Securities (Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Debt Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Securities Financing Transactions Disclosures [Abstract]
Realized gains	$ 150	$ 64	$ 405	$ 133
Realized losses		(18)	(12)	(63)
Net gains	$ 150	$ 46	$ 393	$ 70

Investment Securities (Investme

Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
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	6,109
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Total	8,359
Available-for-sale debt securities, Amortized Cost	8,361	$ 37,170
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	6,085
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value, Total	8,335
Available-for-sale debt securities, Fair Value	8,337	37,009
Held-to-maturity, Due in 1 year or less, Amortized Cost	3,159
Held-to-maturity, Due after 1 year through 5 years, Amortized Cost	26,249
Held-to-maturity, Due after 5 years through 10 years, Amortized Cost	62,051
Held-to-maturity, Due after 10 years, Amortized Cost	3,222
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	94,681
Held-to-maturity debt securities, Amortized Cost	140,474	136,477
Held-to-maturity, Due in 1 year or less, Fair Value	3,176
Held-to-maturity, Due after 1 year through 5, Fair Value	27,288
Held-to-maturity, Due after 5 years through 10 years, Fair Value	64,196
Held-to-maturity, Due after 10 years, Fair Value	3,271
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value	97,931
Held-to-maturity, Fair Value	144,708	$ 137,476
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	45,793
Held-to-maturity without Single Maturity Date, Fair Value	$ 46,777

Loans and Allowance for Loan _3

Loans and Allowance for Loan and Lease Losses (Narrative) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2020USD ($)LoanBorrower	Dec. 31, 2019USD ($)Loan	Jun. 30, 2020USD ($)	Sep. 30, 2019USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable deferred fees and costs	$ 16,536,000	$ 1,081,000
Allowance for loan losses	12,170,000	9,515,000
Loans outstanding, net	2,509,657,000	1,753,241,000
Financing receivable, modifications, recorded investment	$ 928,000	$ 2,238,000
Number of troubled debt restructured loans | Loan	0	0
Loan modifications to number of borrowers affected by Covid | Borrower	1,000
Loans and leases receivable, gross, carrying amount	$ 2,521,827,000	$ 1,762,756,000		$ 1,710,434,000
CARES Act [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Qualifying deferment status percentage of loan portfolio	1.00%		18.00%
Loans and leases receivable, gross, carrying amount	$ 32,851,000		$ 444,486,000
Nonaccruing [Member] | Seven Loans with Five Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	458,000
Nonaccruing [Member] | Eight Loans with Five Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		1,748,000
Nonaccruing [Member] | One Large Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment		1,252,000
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	481,000	490,000
Loans and leases receivable, gross, carrying amount	215,589,000	236,724,000		$ 243,729,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Accruing | Three Unrelated Borrowers [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	470,000	$ 490,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	11,000
PPP Loans [Member] | Small Business Administration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	0
Loans outstanding, net	613,924,000
Loans and leases receivable, gross, carrying amount	629,853,000
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	409,000
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	31,000
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	$ 7,000

Loans and Allowance for Loan _4

Loans and Allowance for Loan and Lease Losses (Classes Of The Loan Portfolio Summarized By The Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	$ 2,521,827	$ 1,762,756	$ 1,710,434
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	70,400	68,271	69,240
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,488,788	1,732,486
Pass [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	68,002	68,224
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	12,121	12,039
Special Mention [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	5
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	20,918	18,231
Substandard [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,393	47
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	968,875	339,147	320,400
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,021,418	929,138	892,060
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	238,208	181,690	177,151
Commercial Portfolio [Member] | Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	956,097	326,573
Commercial Portfolio [Member] | Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,004,999	913,001
Commercial Portfolio [Member] | Pass [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	238,176	181,650
Commercial Portfolio [Member] | Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	9,657	9,558
Commercial Portfolio [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,406	2,426
Commercial Portfolio [Member] | Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	3,121	3,016
Commercial Portfolio [Member] | Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	14,013	13,711
Commercial Portfolio [Member] | Substandard [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	32	40
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	215,589	236,724	243,729
Residential Portfolio [Member] | Pass [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	214,177	235,252
Residential Portfolio [Member] | Special Mention [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	53	55
Residential Portfolio [Member] | Substandard [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,359	1,417
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	7,337	7,786	$ 7,854
Consumer Portfolio [Member] | Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	$ 7,337	$ 7,786

Loans and Allowance for Loan _5

Loans and Allowance for Loan and Lease Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	$ 2,386	$ 25
Impaired Loans with No Allowance: Unpaid Principal Balance	2,417	27
Impaired Loans: Total Recorded Investment	2,386	26
Impaired Loans: Total Unpaid Principal Balance	2,431	32
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment		1
Impaired Loans with No Allowance: Unpaid Principal Balance	14	5
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	859	890
Impaired Loans with No Allowance: Unpaid Principal Balance	891	890
Impaired Loans with Allowance: Recorded Investment	53
Impaired Loans with Allowance: Unpaid Principal Balance	73
Impaired Loans with Allowance: Related Allowance	41
Impaired Loans: Total Recorded Investment	912	893
Impaired Loans: Total Unpaid Principal Balance	964	958
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment		3
Impaired Loans with No Allowance: Unpaid Principal Balance		68
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	7,074	7,973
Impaired Loans with No Allowance: Unpaid Principal Balance	7,425	8,366
Impaired Loans with Allowance: Recorded Investment	360	338
Impaired Loans with Allowance: Unpaid Principal Balance	405	380
Impaired Loans with Allowance: Related Allowance	141	166
Impaired Loans: Total Recorded Investment	8,860	9,734
Impaired Loans: Total Unpaid Principal Balance	9,528	10,454
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	1,426	1,423
Impaired Loans with No Allowance: Unpaid Principal Balance	1,698	1,708
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	32	40
Impaired Loans with No Allowance: Unpaid Principal Balance	34	61
Impaired Loans: Total Recorded Investment	32	40
Impaired Loans: Total Unpaid Principal Balance	34	61
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	834	817
Impaired Loans with No Allowance: Unpaid Principal Balance	859	838
Impaired Loans: Total Recorded Investment	1,176	1,198
Impaired Loans: Total Unpaid Principal Balance	1,444	1,416
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	342	381
Impaired Loans with No Allowance: Unpaid Principal Balance	$ 585	$ 578

Loans and Allowance for Loan _6

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	$ 2,396	$ 27	$ 1,210	$ 38
Impaired Financing Receivable, Average Recorded Investment, Total	2,396	31	1,211	42
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment		4	1	4
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	932		911
Impaired Loans with Allowance: Average Recorded Investment	130	38	67	1,202
Impaired Loans with Allowance: Interest Income Recognized				3
Impaired Financing Receivable, Average Recorded Investment, Total	1,062	49	979	1,224
Impaired Financing Receivable, Interest Income Recognized, Total				3
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		11	1	22
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	32	40	36	40
Impaired Loans with No Allowance: Interest Income Recognized		4
Impaired Loans with Allowance: Average Recorded Investment				183
Impaired Financing Receivable, Average Recorded Investment, Total	32	40	36	223
Impaired Financing Receivable, Interest Income Recognized, Total		4
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	7,171	1,917	7,325	2,697
Impaired Loans with No Allowance: Interest Income Recognized	5		5	11
Impaired Loans with Allowance: Average Recorded Investment	560	617	530	633
Impaired Financing Receivable, Average Recorded Investment, Total	9,159	4,164	9,278	4,932
Impaired Financing Receivable, Interest Income Recognized, Total	5		5	11
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	1,428	1,630	1,423	1,602
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	805	889	794	1,151
Impaired Loans with No Allowance: Interest Income Recognized	6	7	19	21
Impaired Financing Receivable, Average Recorded Investment, Total	1,152	1,944	1,155	2,303
Impaired Financing Receivable, Interest Income Recognized, Total	6	7	19	21
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	$ 347	$ 1,055	$ 361	$ 1,152

Loans and Allowance for Loan _7

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	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 12,896	$ 11,471
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	2,386	26
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	913	894
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	8,859	9,800
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	32	40
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 706	$ 711

Loans and Allowance for Loan _8

Loans and Allowance for Loan and Lease Losses (Loan Portfolio Summarized By The Past Due Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 14,540	$ 13,224
Financing Receivable, Recorded Investment, Current	2,507,287	1,749,532
Total Loans	2,521,827	1,762,756	$ 1,710,434
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,768	1,808	2,146
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3	1,503
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,538	1,546
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11,999	10,175
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	70,400	68,271	69,240
Home Equity [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,380	34
Financing Receivable, Recorded Investment, Current	68,020	68,236
Total Loans	70,400	68,270
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current		1
Total Loans		1	4
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		34
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	16
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	2,364
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	968,875	339,147	320,400
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,356	1,949
Financing Receivable, Recorded Investment, Current	966,519	337,195
Total Loans	968,875	339,144
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		3
Total Loans		3	5
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	1,490	1,059
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	866	890
Commercial Portfolio [Member] | Commercial and Industrial [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		3
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,021,418	929,138	892,060
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	7,871	9,128
Financing Receivable, Recorded Investment, Current	1,012,121	918,587
Total Loans	1,019,992	927,715
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,417	1,423
Financing Receivable, Recorded Investment, Current	9
Total Loans	1,426	1,423	1,643
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		1,298
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		16
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	1,029	11
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		473
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	6,842	7,819
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	1,417	934
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	238,208	181,690	177,151
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	238,208	181,690
Total Loans	238,208	181,690
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	7,337	7,786	7,854
Consumer Portfolio [Member] | Consumer [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4	8
Financing Receivable, Recorded Investment, Current	7,333	7,778
Total Loans	7,337	7,786
Consumer Portfolio [Member] | Consumer [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	3	5
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	1	3
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	215,589	236,724	243,729
Residential Portfolio [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	330	471
Financing Receivable, Recorded Investment, Current	214,917	235,872
Total Loans	215,247	236,343
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	182	208
Financing Receivable, Recorded Investment, Current	160	173
Total Loans	342	381	$ 494
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		145
Residential Portfolio [Member] | Residential Mortgage [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		5
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	2
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	328	326
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	$ 182	$ 203

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	$ 11,067	$ 8,771	$ 9,515	$ 8,397
Charge-offs	(8)	(66)	(78)	(370)
Recoveries	11	46	33	134
Provisions (credits)	1,100	565	2,700	1,155
Allowance for Loan Losses, Ending balance	12,170	9,316	12,170	9,316
Allowance for loan losses: Ending balance: individually evaluated for impairment	182	336	182	336	$ 166
Allowance for loan losses: Ending balance: collectively evaluated for impairment	11,988	8,980	11,988	8,980	9,349
Loans receivables, Ending balance	2,521,827	1,710,434	2,521,827	1,710,434	1,762,756
Loans receivables: Ending balance: individually evaluated for impairment	11,598	3,271	11,598	3,271	10,083
Loans Receivable: Ending balance: collectively evaluated for impairment	2,508,461	1,705,017	2,508,461	1,705,017	1,750,865
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	1,768	2,146	1,768	2,146	1,808
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	517	482	442	528
Recoveries		1	1	2
Provisions (credits)	14	13	88	(34)
Allowance for Loan Losses, Ending balance	531	496	531	496
Allowance for loan losses: Ending balance: collectively evaluated for impairment	531	496	531	496	442
Loans receivables, Ending balance	70,400	69,240	70,400	69,240	68,271
Loans receivables: Ending balance: individually evaluated for impairment	2,386	26	2,386	26	25
Loans Receivable: Ending balance: collectively evaluated for impairment	68,014	69,210	68,014	69,210	68,245
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance		4		4	1
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	2,786	2,448	2,341	2,391
Charge-offs		(12)	(45)	(217)
Recoveries		1	2	44
Provisions (credits)	138	6	626	225
Allowance for Loan Losses, Ending balance	2,924	2,443	2,924	2,443
Allowance for loan losses: Ending balance: individually evaluated for impairment	41		41
Allowance for loan losses: Ending balance: collectively evaluated for impairment	2,883	2,443	2,883	2,443	2,341
Loans receivables, Ending balance	968,875	320,400	968,875	320,400	339,147
Loans receivables: Ending balance: individually evaluated for impairment	912		912		890
Loans Receivable: Ending balance: collectively evaluated for impairment	967,963	320,395	967,963	320,395	338,254
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance		5		5	3
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	7,241	5,312	6,259	4,703
Charge-offs		(42)		(53)
Recoveries		41	1	74
Provisions (credits)	529	544	1,510	1,131
Allowance for Loan Losses, Ending balance	7,770	5,855	7,770	5,855
Allowance for loan losses: Ending balance: individually evaluated for impairment	141	336	141	336	166
Allowance for loan losses: Ending balance: collectively evaluated for impairment	7,629	5,519	7,629	5,519	6,093
Loans receivables, Ending balance	1,021,418	892,060	1,021,418	892,060	929,138
Loans receivables: Ending balance: individually evaluated for impairment	7,434	2,324	7,434	2,324	8,311
Loans Receivable: Ending balance: collectively evaluated for impairment	1,012,558	888,093	1,012,558	888,093	919,404
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	1,426	1,643	1,426	1,643	1,423
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	65	45	51	75
Charge-offs			(7)	(40)
Recoveries			2
Provisions (credits)	(4)	1	15	11
Allowance for Loan Losses, Ending balance	61	46	61	46
Allowance for loan losses: Ending balance: collectively evaluated for impairment	61	46	61	46	51
Loans receivables, Ending balance	238,208	177,151	238,208	177,151	181,690
Loans receivables: Ending balance: individually evaluated for impairment	32	40	32	40	40
Loans Receivable: Ending balance: collectively evaluated for impairment	238,176	177,111	238,176	177,111	181,650
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	427	476	417	453
Charge-offs	(4)	(3)	(4)	(3)
Recoveries		2	3	2
Provisions (credits)	47	(7)	54	16
Allowance for Loan Losses, Ending balance	470	468	470	468
Allowance for loan losses: Ending balance: collectively evaluated for impairment	470	468	470	468	417
Loans receivables, Ending balance	215,589	243,729	215,589	243,729	236,724
Loans receivables: Ending balance: individually evaluated for impairment	834	881	834	881	817
Loans Receivable: Ending balance: collectively evaluated for impairment	214,413	242,354	214,413	242,354	235,526
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	342	494	342	494	381
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	2	7	2	7
Charge-offs	(4)	(9)	(22)	(57)
Recoveries	11	1	24	12
Provisions (credits)	(7)	6	(2)	43
Allowance for Loan Losses, Ending balance	2	5	2	5
Allowance for loan losses: Ending balance: collectively evaluated for impairment	2	5	2	5	2
Loans receivables, Ending balance	7,337	7,854	7,337	7,854	7,786
Loans Receivable: Ending balance: collectively evaluated for impairment	7,337	7,854	7,337	7,854	7,786
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance	29	1	3	240
Provisions (credits)	383	2	409	(237)
Allowance for Loan Losses, Ending balance	412	3	412	3
Allowance for loan losses: Ending balance: collectively evaluated for impairment	$ 412	$ 3	$ 412	$ 3	$ 3

Loans and Allowance for Loan_10

Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,951,000	$ 3,282,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,850,000	3,181,000
Financing Receivable, Modifications, Recorded Investment	928,000	2,238,000
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	8,000	3,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,000	3,000
Financing Receivable, Modifications, Recorded Investment	7,000	3,000
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	1,214,000	2,562,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,115,000	2,463,000
Financing Receivable, Modifications, Recorded Investment	409,000	1,705,000
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	31,000	40,000
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	689,000	677,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	687,000	675,000
Financing Receivable, Modifications, Recorded Investment	$ 481,000	$ 490,000

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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Accretable yield, beginning balance	$ 56	$ 197	$ 89	$ 309
Accretable yield amortized to interest income	(7)	(55)	(40)	(167)
Accretable yield, ending balance	$ 49	$ 142	$ 49	$ 142

Leases - Addititonal Informatio

Leases - Addititonal Information (Details)	Sep. 30, 2020USD ($)
Lease Cost [Abstract]
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	Sep. 30, 2020	Dec. 31, 2019
Operating Leases
Right of use asset	$ 10,173	$ 11,442
Lease liability	$ 11,212	$ 12,544
Weighted average remaining lease term (in years)	8 years 3 months 18 days	8 years 7 months 20 days
Weighted average discount rate	3.35%	3.33%
Finance Lease
Right of use asset	$ 3,312	$ 3,447
Lease liability	$ 3,488	$ 3,551
Weighted average remaining lease term (in years)	18 years 5 months 1 day	19 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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finance lease cost:
Amortization of right-of-use asset	$ 45	$ 45	$ 135	$ 105
Interest expense on lease liability	33	34	100	80
Total finance lease cost	78	79	235	185
Operating lease cost	504	515	1,537	1,545
Short-term and equipment lease cost	10	11	31	42
Sublease income	(3)	(6)	(13)	(18)
Total lease costs	$ 589	$ 599	$ 1,790	$ 1,754

Leases - Summary of Cash Paid f

Leases - Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 100	$ 80
Operating cash flows from operating leases	1,584	1,633
Financing cash flows from finance leases	$ 62	$ 26

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	Sep. 30, 2020	Dec. 31, 2019
Operating lease payments due:
Within one year	$ 521
After one but within two years	1,868
After two but within three years	1,824
After three but within four years	1,572
After four but within five years	1,512
After five years	5,584
Total undiscounted cash flows	12,881
Discount on cash flows	(1,669)
Total lease liability	11,212	$ 12,544
Finance lease payments due:
Within one year	54
After one but within two years	216
After two but within three years	217
After three but within four years	217
After four but within five years	252
After five years	3,992
Total undiscounted cash flows	4,948
Discount on cash flows	(1,460)
Total lease liability	$ 3,488	$ 3,551

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] $ in Thousands	Sep. 30, 2020USD ($)
Other Assets [Member]
Derivative [Line Items]
Interest Rate Swap Contracts - Commercial Loans, Fair Value (a)	$ 213	[1]
Interest Rate Swaps {Member]
Derivative [Line Items]
Interest Rate Swap Contracts - Commercial Loans, Notional Amount	8,826
Interest Rate Swap Contracts - Commercial Loans, Cash Collateral Posted (b)	$ 250	[2]
[1]	Included in other assets 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) $ in Thousands	Sep. 30, 2020USD ($)
Gross amounts not offset:
Cash collateral	$ 250
Net Amounts	250
Interest Rate Swaps {Member] | Commercial Loan [Member]
Derivative [Line Items]
Gross amounts recognized	213
Gross amounts offset	$ 213

Fair Value Measurement (Assets

Fair Value Measurement (Assets Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 8,337	$ 37,009
Available-for-sale securities	10,072	37,516
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,522	507
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	8,550	37,009
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	12,890
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	12,890
State and political subdivision obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		30
State and political subdivision obligations [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		30
Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	8,335	1,259
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	8,335	1,259
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity securities	1,522	507
Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity securities	1,522	507
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	213
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	$ 213
U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities		22,830
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		$ 22,830

Fair Value Measurement (Fair Va

Fair Value Measurement (Fair Value Measurements, Nonrecurring) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 398	$ 271
Foreclosed Assets Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	121	122
Level 3 [Member] | Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	398	271
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	$ 121	$ 122

Fair Value Measurement (Fair _2

Fair Value Measurement (Fair Value Inputs, Assets, Quantitative Information) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
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	$ 398	$ 271
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	$ 398	$ 271
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	$ 121	$ 122
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	$ 121	$ 122
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	25.00%	26.00%
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%	8.00%
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	88.00%	85.00%
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	34.00%	36.00%
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%	16.00%

Fair Value Measurement (Fair _3

Fair Value Measurement (Fair Value, by Balance Sheet Grouping) (Details) - USD ($)		Sep. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale investment securities		$ 8,337,000	$ 37,009,000
Held-to-maturity investment securities		144,708,000	137,476,000
Equity securities		1,522,000	507,000
Net loans and leases		295,290,000	414,498,000
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		195,357,000	139,030,000
Available-for-sale investment securities		8,337,000	37,009,000
Held-to-maturity investment securities		140,474,000	136,477,000
Equity securities		1,522,000	507,000
Loans held for sale		30,938,000	8,422,000
Net loans and leases		2,509,657,000	1,753,241,000
Restricted investment in bank stocks		7,726,000	4,902,000
Accrued interest receivable		14,663,000	2,810,000
Net Amounts Presented in the Consolidated Balance Sheets		213,000
Deposits		2,456,398,000	1,912,394,000
Short-term borrowings		203,842,000
Long-term debt	[1]	71,711,000	29,352,000
Subordinated debt		41,972,000	27,070,000
Accrued interest payable		2,840,000	2,208,000
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		195,357,000	139,030,000
Available-for-sale investment securities		8,337,000	37,009,000
Held-to-maturity investment securities		144,708,000	137,476,000
Equity securities		1,522,000	507,000
Loans held for sale		31,586,000	8,630,000
Net loans and leases		2,596,329,000	1,789,402,000
Restricted investment in bank stocks		7,726,000	4,902,000
Accrued interest receivable		14,663,000	2,810,000
Net Amounts Presented in the Consolidated Balance Sheets		213,000
Deposits		2,465,117,000	1,916,624,000
Short-term borrowings		203,842,000
Long-term debt	[1]	71,243,000	30,216,000
Subordinated debt		40,352,000	25,273,000
Accrued interest payable		$ 2,840,000	$ 2,208,000
[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 ($)		Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		$ 144,708,000	$ 137,476,000
Net loans and leases		295,290,000	414,498,000
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		144,708,000	137,476,000
Loans held for sale		31,586,000	8,630,000
Deposits		2,465,117,000	1,916,624,000
Long-term debt	[1]	71,243,000	30,216,000
Subordinated debt		40,352,000	25,273,000
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases		2,596,329,000	1,789,402,000
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		140,474,000	136,477,000
Loans held for sale		30,938,000	8,422,000
Net loans and leases		2,509,657,000	1,753,241,000
Deposits		2,456,398,000	1,912,394,000
Long-term debt	[1]	71,711,000	29,352,000
Subordinated debt		41,972,000	27,070,000
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity investment securities		144,708,000	137,476,000
Loans held for sale		31,586,000	8,630,000
Net loans and leases		2,596,329,000	1,789,402,000
Deposits		2,465,117,000	1,916,624,000
Long-term debt	[1]	71,243,000	30,216,000
Subordinated debt		$ 40,352,000	$ 25,273,000
[1]	Long-term debt excludes finance lease obligations.

Guarantees, Commitments, and _2

Guarantees, Commitments, and Contingencies (Narrative) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2020USD ($)Apartment	Dec. 31, 2019USD ($)
Commitments, Contingencies and Guarantees [Line Items]
Number of apartments under the project | Apartment	37
Total investment in limited partnership, net of amortization	$ 157,000	$ 190,000
Limited partner capital contribution commitment	7,579,000
Total LIHTCs amount awarded for the project	861,000
Total anticipated LIHTCs amount under the housing project	$ 8,613,000
Project investment amortization period	10 years	10 years
PPP Loans [Member] | Small Business Administration [Member]
Commitments, Contingencies and Guarantees [Line Items]
Nonrefundable loan processing fees received	$ 20,883,000
Other Assets [Member]
Commitments, Contingencies and Guarantees [Line Items]
Total investment in limited partnership, net of amortization	6,872,000	$ 7,249,000
Financial Standby Letters of Credit [Member]
Commitments, Contingencies and Guarantees [Line Items]
Commitments to extend credit	$ 39,682,000	$ 26,574,000

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Maturity of federal funds purchased from correspondent banks			one business day
Real estate secured loans	$ 1,220,316,000		$ 1,220,316,000
Current borrowing available	471,029,000		471,029,000
Maximum borrowing capacity	851,213,000		851,213,000
Short term borrowings	203,842,000		203,842,000
Long-term debt outstanding	75,199,000		75,199,000		$ 32,903,000
FHLB prepayment	22,500,000		22,500,000
FHLB prepayment penalties	26,000	$ 0	165,000	$ 0
FHLB [Member]
Debt Instrument [Line Items]
Letter of credit outstanding, amount	306,551,000		306,551,000		169,051,000
Paycheck Protection Program Liquidity Facility [Member]
Debt Instrument [Line Items]
Short term borrowings	$ 203,842,000		$ 203,842,000		0
Short-term borrowings, term			five years
Short-term borrowings, interest Rate	0.35%		0.35%
Other Correspondent Banks [Member]
Debt Instrument [Line Items]
Outstanding drawings			$ 0		0
Line of credit facility, remaining borrowing capacity	$ 35,000,000		35,000,000
Short term borrowings	$ 0		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	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Less: fair value adjustments on debt assumed in acquisitions		$ (41)
Total FHLB fixed rate instruments	$ 71,711	29,352
Lease obligations included in long-term debt	3,488	3,551
Total long-term debt	$ 75,199	32,903
Due in June 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 2,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	1.72%	1.72%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-06	2020-06
Due in July 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	2.45%	2.45%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-07	2020-07
Due in August 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	3.05%	3.05%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-08	2020-08
Due in September 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 2,500
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	2.38%	2.38%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-09	2020-09
Due in October 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	3.06%	3.06%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-10	2020-10
Due in November 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 3,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	2.32%	2.32%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-11	2020-11
Due in December 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 2,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	1.78%	1.78%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-12	2020-12
Due in December 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 3,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	2.31%	2.31%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-12	2020-12
Due in April 2022 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 70,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	0.86%	0.86%
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	$ 1,667	$ 1,846
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	$ 44	$ 47
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 ($)	Mar. 20, 2020	Dec. 19, 2017	Dec. 09, 2015	Jul. 31, 2018	Sep. 30, 2020	Dec. 31, 2019
Subordinated Notes Due 2030 [Member]
Subordinated debt issuance	$ 15,000,000
Subordinated Notes Due 2020 [Member]
Debt instrument, interest rate, effective percentage	4.00%
Debt Instrument, Description of Variable Rate Basis					The 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 2020 Notes are floating will at no time be less than 4.25%.
Debt instrument, payment terms					Interest will be 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 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 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 2020 Notes at 100% of the principal amount of the 2020 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption.
Notes payable to related parties					$ 1,700,000
Subordinated Notes Due 2020 [Member] | WSJ Prime Rate [Member] | Maximum [Member]
Debt instrument, interest rate, effective percentage	4.25%
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					2015 Notes bear interest at a rate of 5.15% 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 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 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					$ 67,000	103,000
Subordinated Notes Due 2025 [Member] | First Priority Financial Corp. [Member]
Subordinated debt issuance				$ 9,500,000
Debt instrument, interest rate, effective percentage				7.00%
Debt Instrument, Description of Variable Rate Basis					The First Priority Notes are non-callable for an initial period of five years and include provisions for redemption pricing between 101.5% and 100.5% of the liquidation value if called after five years but prior to the stated maturity date
Debt instrument, maturity date					Nov. 30, 2025
Subordinated debt acquired				$ 9,500,000
Subordinated debt fair value premium				$ 247,000
Debt instrument, issuance date					Nov. 13, 2015
Debt instrument non-callable period				5 years
Subordinated Notes Due 2025 [Member] | Maximum [Member] | First Priority Financial Corp. [Member]
Debt instrument redemption price percentage				101.50%
Subordinated Notes Due 2025 [Member] | Minimum [Member] | First Priority Financial Corp. [Member]
Debt instrument redemption price percentage				100.50%
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%
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 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					$ 67,000	$ 103,000
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%

Defined Benefit Plans (Narrativ

Defined Benefit Plans (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]
Contributions by employer to defined benefit plan	$ 200,000	$ 200,000

Defined Benefit Plans (Net Peri

Defined Benefit Plans (Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 32	$ 36	$ 96	$ 107
Interest cost	53	65	158	194
Expected return on plan assets	(68)	(63)	(205)	(190)
Amortization of net gain		(15)		(44)
Settlement loss (gain)			22	(37)
Net periodic benefit expense (income)	17	23	71	30
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1		2	2
Interest cost	3	5	9	13
Accretion of prior service cost	(5)	(5)	(15)	(15)
Amortization of net gain	(1)	(1)	(1)	(3)
Net periodic benefit expense (income)	$ (2)	$ (1)	$ (5)	$ (3)

Common Stock (Details)

Common Stock (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Aug. 26, 2020	Aug. 25, 2020	Dec. 31, 2019	May 14, 2019	May 13, 2019	May 06, 2014
Class of Stock [Line Items]
Common stock, shares authorized	20,000,000		20,000,000				20,000,000	20,000,000	10,000,000
2014 Restricted Stock Plan [Member]
Class of Stock [Line Items]
Common stock, shares authorized					200,000	100,000
Shares authorized per plan										100,000
Shares granted			83,414
Allocated share-based compensation expense	$ 104,000	$ 91,000	$ 265,000	$ 250,000
Shares forfeited and available for reissuance			2,446
Restricted shares vested during period			42,041
Granted shares unvested	38,927		38,927
Shares forfeited			100	0
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	10.20%		10.20%
Stock repurchase program expiration date			Mar. 19, 2021
Stock repurchased during period, shares			92,652
Stock repurchased at average price per share	$ 19.37		$ 19.37

COVID-19 Pandemic Implications

COVID-19 Pandemic Implications (Narrative) (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2020USD ($)Borrower	Oct. 26, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, net, carrying amount	$ 2,509,657,000	$ 2,509,657,000			$ 1,753,241,000
Loans and leases receivable, gross, carrying amount	2,521,827,000	$ 2,521,827,000			$ 1,762,756,000	$ 1,710,434,000
Loan modifications to number of borrowers affected by Covid | Borrower		1,000
CARES Act [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount	$ 32,851,000	$ 32,851,000		$ 444,486,000
Qualifying deferment status percentage of loan portfolio	1.00%	1.00%		18.00%
CARES Act [Member] | Subsequent Event [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount			$ 11,804,000
Qualifying deferment status percentage of loan portfolio			1.00%
PPP Loans [Member] | Small Business Administration [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, net, carrying amount	$ 613,924,000	$ 613,924,000
Loan guarantee description		The PPP loans, which are 100 percent guaranteed by the Small Business Administration (“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		$ 20,883,000
Loan processing fees	2,583,000	4,954,000
Deferred loan processing fees	15,929,000	$ 15,929,000
Amortization of loan processing fees description		The PPP loan processing fees will be amortized over the life of the respective loans.
Loans and leases receivable, gross, carrying amount	629,853,000	$ 629,853,000
PPP Loans [Member] | Small Business Administration [Member] | Loans and Leases, Net of Unearned Interest [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount	629,853,000	629,853,000
PPP Loans [Member] | Small Business Administration [Member] | Interest and Fees on Loans and Leases [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan processing fees	2,583,000	4,954,000
PPP Loans [Member] | Small Business Administration [Member] | Loan Origination Cost [Member]
Unusual Risk Or Uncertainty [Line Items]
Deferred loan processing fees	$ 15,929,000	$ 15,929,000
PPP Loans [Member] | Small Business Administration [Member] | Maximum [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans maturity term		2 years
Percentage of processing fee per loan		5.00%
PPP Loans [Member] | Small Business Administration [Member] | Minimum [Member]
Unusual Risk Or Uncertainty [Line Items]
Percentage of processing fee per loan		1.00%