Mid Penn Bancorp (MPB) 10-K 19 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 01, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018
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 Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		8,459,918
Entity Current Reporting Status	Yes
Entity Public Float			$ 213,745,643
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 24,600,000	$ 19,795,000
Interest-bearing balances with other financial institutions	4,572,000	3,028,000
Federal funds sold	10,893,000	691,000
Total cash and cash equivalents	40,065,000	23,514,000
Investment securities available for sale	111,923,000	93,465,000
Investment securities held to maturity, at amortized cost (fair value $166,582 and $100,483)	168,370,000	101,356,000
Loans held for sale	1,702,000	1,040,000
Loans and leases, net of unearned interest	1,624,067,000	910,404,000
Less: Allowance for loan and lease losses	(8,397,000)	(7,606,000)
Net loans and leases	1,615,670,000	902,798,000
Bank premises and equipment, net	25,303,000	16,168,000
Cash surrender value of life insurance	16,691,000	13,042,000
Restricted investment in bank stocks	6,646,000	4,384,000
Foreclosed assets held for sale	1,017,000	189,000
Accrued interest receivable	8,244,000	4,564,000
Deferred income taxes	4,696,000	1,888,000
Goodwill	62,840,000	3,918,000
Core deposit and other intangibles, net	7,221,000	434,000
Other assets	7,593,000	3,594,000
Total Assets	2,077,981,000	1,170,354,000
LIABILITIES & SHAREHOLDERS’ EQUITY
Deposits: Noninterest-bearing demand	269,870,000	163,714,000
Deposits: Interest-bearing demand	384,834,000	349,241,000
Deposits: Money Market	375,648,000	246,220,000
Deposits: Savings	209,345,000	62,770,000
Deposits: Time	486,329,000	201,623,000
Total Deposits	1,726,026,000	1,023,568,000
Short-term borrowings	43,100,000	34,611,000
Long-term debt	48,024,000	12,352,000
Subordinated debt	27,082,000	17,338,000
Accrued interest payable	2,262,000	645,000
Other liabilities	8,278,000	6,137,000
Total Liabilities	1,854,772,000	1,094,651,000
Shareholders' Equity:
Common stock, par value $1.00; authorized 10,000,000 shares; 8,459,918 and 4,242,216 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively	8,460,000	4,242,000
Additional paid-in capital	177,565,000	40,970,000
Retained earnings	39,562,000	32,565,000
Accumulated other comprehensive loss	(2,378,000)	(2,074,000)
Total Shareholders’ Equity	223,209,000	75,703,000
Total Liabilities and Shareholders' Equity	$ 2,077,981,000	$ 1,170,354,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 166,582	$ 100,483
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Shares, Issued	8,459,918	4,242,216
Common Stock, Shares, Outstanding	8,459,918	4,242,216

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INTEREST INCOME
Interest and fees on loans and leases	$ 61,692	$ 40,156	$ 36,402
Interest on interest-bearing balances	75	18	12
Interest on federal funds sold	451	115	82
Interest and dividends on investment securities:
U.S. Treasury and government agencies	3,518	2,273	1,346
State and political subdivision obligations, tax-exempt	2,323	1,113	2,066
Other securities	595	217	304
Total Interest Income	68,654	43,892	40,212
INTEREST EXPENSE
Interest on deposits	10,884	5,463	4,514
Interest on short-term borrowings	207	111	15
Interest on long-term and subordinated debt	1,629	730	838
Total Interest Expense	12,720	6,304	5,367
Net Interest Income	55,934	37,588	34,845
PROVISION FOR LOAN AND LEASE LOSSES	500	325	1,870
Net Interest Income After Provision for Loan and Lease Losses	55,434	37,263	32,975
NONINTEREST INCOME
Net gain on sales of investment securities	137	42	1,046
Earnings from cash surrender value of life insurance	286	262	264
Net gain on sales of SBA loans	561	800	470
Other income	2,039	893	918
Total Noninterest Income	7,462	5,707	5,946
NONINTEREST EXPENSE
Salaries and employee benefits	23,862	16,929	15,564
Occupancy expense, net	4,019	2,512	2,064
Equipment expense	2,186	1,536	1,689
Pennsylvania Bank Shares Tax expense	225	451	648
FDIC Assessment	772	792	688
Legal and professional fees	1,117	802	711
Marketing and advertising expense	1,025	516	500
Software licensing and utilization	3,036	2,051	1,908
Telephone expense	621	497	548
Loss on sale or write-down of foreclosed assets	4	88	217
Intangible amortization	1,224	104	126
Merger and acquisition expense	4,790	619
Other expenses	7,290	4,484	4,177
Total Noninterest Expense	50,171	31,381	28,840
INCOME BEFORE PROVISION FOR INCOME TAXES	12,725	11,589	10,081
Provision for income taxes	2,129	4,500	2,277
NET INCOME	10,596	7,089	7,804
Series D preferred stock dividends	102
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 10,494	$ 7,089	$ 7,804
PER COMMON SHARE DATA:
Basic and Diluted Earnings Per Common Share	$ 1.48	$ 1.67	$ 1.85
Cash Dividends Declared	$ 0.45	$ 0.77	$ 0.68
Income from Fiduciary Activities [Member]
NONINTEREST INCOME
Non-interest Income	$ 1,155	$ 845	$ 481
Service Charges on Deposits [Member]
NONINTEREST INCOME
Non-interest Income	933	721	684
Mortgage Banking Income [Member]
NONINTEREST INCOME
Non-interest Income	751	872	922
ATM Debit Card Interchange Income [Member]
NONINTEREST INCOME
Non-interest Income	1,253	937	844
Merchant Services Income [Member]
NONINTEREST INCOME
Non-interest Income	$ 347	$ 335	$ 317

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 10,596	$ 7,089	$ 7,804
Other comprehensive income (loss)
Unrealized gains (losses) arising during the period on available-for-sale securities, net of income taxes impact, respectively		(1,010)	1,143	(3,794)
Reclassification adjustment for net gain on sales of available-for-sale securities included in net income, net of income taxes impact, respectively	[1]	(108)	(28)	(690)
Change in defined benefit plans, net of income taxes impact, respectively	[2]	1,361	5	(181)
Reclassification adjustment for settlement gains on benefit plans, net of income taxes	[3]	(582)
Total other comprehensive income (loss)		(339)	1,120	(4,665)
Total comprehensive income		$ 10,257	$ 8,209	$ 3,139
[1]	Amounts are included in net gain on sales of investment securities on the Consolidated Statements of Income as a separate component within total noninterest income
[2]	The change in defined benefit plans includes several components of net periodic benefit costs, including service costs, interest costs, expected return on plan assets, and amortization of prior service costs. Please reference Note 16 – Defined Benefit Plans, for the classification of these components on Consolidated Statements of Income.
[3]	(d) Amounts are included in other income on the Consolidated Statements of Income within total noninterest income

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Unrealized gains (losses) arising during the period on available for sale securities, tax	$ (259)	$ 589	$ (1,954)
Reclassification adjustment for net gain on sales of available for sale securities included in net income, tax	(29)	(14)	(356)
Change in defined benefit plans, tax	361	3	(93)
Reclassification adjustment for settlement gains on benefit plans, tax	$ (155)	$ 0	$ 0
Income tax impacts of the components of other comprehensive income	21.00%	34.00%	34.00%

Consolidated Statements of Chan

Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	First Priority Financial Corp. [Member]	Scottdale Bank and Trust Company [Member]	Series D [Member]	Series D [Member]First Priority Financial Corp. [Member]	Preferred Stock [Member]	Preferred Stock [Member]Series D [Member]	Preferred Stock [Member]Series D [Member]First Priority Financial Corp. [Member]	Common Stock [Member]	Common Stock [Member]First Priority Financial Corp. [Member]	Common Stock [Member]Scottdale Bank and Trust Company [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]First Priority Financial Corp. [Member]	Additional Paid-in Capital [Member]Scottdale Bank and Trust Company [Member]	Retained Earnings [Member]	Retained Earnings [Member]Series D [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2015	$ 70,068								$ 4,227			$ 40,559			$ 23,470		$ 1,812
Net income	7,804														7,804
Total other comprehensive (loss) income, net of taxes	(4,665)																(4,665)
Common stock dividends declared	(2,875)														(2,875)
Employee Stock Purchase Plan	82								4			78
Restricted stock activity	53								2			51
Balance at Dec. 31, 2016	70,467					$ 0			4,233			40,688			28,399		(2,853)
Net income	7,089														7,089
Total other comprehensive (loss) income, net of taxes	1,120																1,120
Common stock dividends declared	(3,264)														(3,264)
Employee Stock Purchase Plan	104								4			100
Director Stock Purchase Plan	42								1			41
Restricted stock activity	145								4			141
Tax rate adjustment impact															341		(341)
Balance at Dec. 31, 2017	75,703					0			4,242			40,970			32,565		(2,074)
Impact of adoption of new accounting standard (ASU 2016-01 [Member]) at Dec. 31, 2017	(9)														(44)		35
Balance at Dec. 31, 2017	75,694								4,242			40,970			32,521		(2,039)
Net income	10,596														10,596
Total other comprehensive (loss) income, net of taxes	(339)																(339)
Stock issued to shareholders		$ 76,122	$ 64,181		$ 3,404			$ 3,404		$ 2,321	$ 1,879		$ 73,801	$ 62,302
Preferred stock dividends				$ (102)												$ (102)
Preferred stock redemption				$ (3,404)			$ (3,404)
Common stock dividends declared	(3,453)														(3,453)
Employee Stock Purchase Plan	119								4			115
Director Stock Purchase Plan	124								4			120
Restricted stock activity	267								10			257
Balance at Dec. 31, 2018	$ 223,209					$ 0			$ 8,460			$ 177,565			$ 39,562		$ (2,378)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock issued during period, shares, Employee Stock Purchase Plans	4,132	3,578	4,465
Stock issued during period shares, Restricted stock activity	9,647	3,996	2,115
Stock issued during period shares, Director Stock Purchase Plans	4,296	1,345
Scottdale Bank and Trust Company [Member]
Stock issued during period, shares	1,878,827
First Priority Financial Corp. [Member]
Stock issued during period, shares	2,320,800
Common Stock [Member]
Stock issued during period, shares, Employee Stock Purchase Plans	4,132	3,578	4,465

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities:
Net Income	$ 10,596,000	$ 7,089,000	$ 7,804,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	500,000	325,000	1,870,000
Depreciation	2,395,000	1,464,000	1,658,000
Amortization of intangibles	1,224,000	105,000	126,000
Net amortization of security premiums	517,000	1,280,000	11,709,000
Gain on sales of investment securities	(137,000)	(42,000)	(1,046,000)
Earnings on cash surrender value of life insurance	(286,000)	(262,000)	(264,000)
Mortgage loans originated for sale	(46,264,000)	(44,010,000)	(42,888,000)
Proceeds from sales of mortgage loans originated for sale	46,353,000	45,801,000	43,810,000
Gain on sale of mortgage loans	(751,000)	(872,000)	(922,000)
SBA loans originated for sale	(7,734,000)	(10,282,000)	(5,872,000)
Proceeds from sales of SBA loans originated for sale	8,296,000	11,082,000	6,342,000
Gain on sale of SBA loans	(561,000)	(800,000)	(470,000)
Loss on write-down/disposal of property, plant, and equipment	71,000	14,000	142,000
Loss on sale / write-down of foreclosed assets	4,000	88,000	217,000
Restricted stock compensation expense	267,000	145,000	53,000
Deferred income tax expense (benefit)	1,317,000	1,828,000	(336,000)
Increase in accrued interest receivable	(398,000)	(636,000)	(115,000)
Increase in other assets	(1,779,000)	(380,000)	(99,000)
Increase in accrued interest payable	528,000	130,000	125,000
(Decrease) increase in other liabilities	(3,175,000)	(172,000)	4,000
Net Cash Provided By Operating Activities	10,983,000	11,895,000	21,848,000
Investing Activities:
Net decrease in interest-bearing time deposits with other financial institutions			4,317,000
Proceeds from the maturity of investment securities	31,728,000	11,062,000	16,110,000
Proceeds from the sale of investment securities	158,271,000	52,932,000	111,390,000
Purchases of investment securities	(100,205,000)	(124,738,000)	(142,861,000)
Net cash received from acquisitions	72,616,000
Redemptions (purchases) of restricted investment in bank stocks	72,000	(1,941,000)	1,823,000
Net increase in loans and leases	(132,097,000)	(96,570,000)	(77,795,000)
Purchases of bank premises and equipment	(8,958,000)	(6,879,000)	(775,000)
Proceeds from sale of bank premises and equipment		2,201,000
Proceeds from sale of foreclosed assets	420,000	136,000	992,000
Net Cash Provided By (Used In) Investing Activities	21,847,000	(163,797,000)	(86,799,000)
Financing Activities:
Net (decrease) increase in deposits	(12,469,000)	88,195,000	158,330,000
Net (decrease) increase in short-term borrowings	(25,836,000)	34,611,000	(31,596,000)
Proceeds from long-term debt issuance	30,000,000
Common stock dividends paid	(4,513,000)	(2,204,000)	(2,452,000)
Long-term debt repayment	(198,000)	(1,220,000)	(26,724,000)
Deferred financing fees paid for subordinated debt issuance		(85,000)
Subordinated debt issuance		10,000,000
Net Cash (Used In) Provided By Financing Activities	(16,279,000)	129,443,000	97,640,000
Net increase (decrease) in cash and cash equivalents	16,551,000	(22,459,000)	32,689,000
Cash and cash equivalents, beginning of year	23,514,000	45,973,000	13,284,000
Cash and cash equivalents, end of year	40,065,000	23,514,000	45,973,000
Supplemental Disclosures of Cash Flow Information:
Interest paid	11,103,000	6,174,000	5,242,000
Income taxes paid	1,425,000	3,890,000	1,700,000
Supplemental Noncash Disclosures:
Loan transfers to foreclosed assets held for sale	1,116,000	189,000	248,000
Dividends declared and not paid		1,060,000	423,000
Asset transfers to bank premises and equipment held for sale			1,894,000
First Priority and Scottdale [Member]
Supplemental Noncash Disclosures:
Common stock issued to First Priority and Scottdale shareholders	4,200,000
Assets Acquired:
Securities	177,016,000
Loans	582,392,000
Restricted stock	2,334,000
Property and equipment	2,643,000
Foreclosed assets	136,000
Deferred income taxes	4,190,000
Accrued interest receivable	3,282,000
Core deposit and other intangible assets	7,976,000
Cash surrender value of life insurance	3,363,000
Other assets	1,100,000
Assets acquired	784,432,000
Liabilities Assumed:
Deposits	714,927,000
Borrowings	49,939,000
Accrued interest payable	1,089,000
Other liabilities	6,309,000
Liabilities assumed	772,264,000
Equity Acquired:
Preferred stock	3,404,000
Employee [Member]
Financing Activities:
Stock Purchase Plan share issuance	119,000	104,000	$ 82,000
Director [Member]
Financing Activities:
Stock Purchase Plan share issuance	124,000	$ 42,000
Series D Preferred Stock [Member]
Financing Activities:
Preferred stock dividends paid	(102,000)
Preferred stock redemption	$ (3,404,000)

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	(1) For all periods presented, the accompanying consolidated financial statements include the accounts of Mid Penn Bancorp, Inc. and its wholly-owned subsidiary Mid Penn Bank (the “Bank”), and for the year ended December 31, 2016, include the accounts of the Bank’s former wholly-owned subsidiary, Mid Penn Insurance Services, LLC, were included in the accompanying consolidated financial statements which was closed effective March 1, 2016. Mid Penn Bancorp, Inc. and its wholly owned subsidiaries are collectively referred to herein as “Mid Penn” or the “Corporation.” All material intercompany accounts and transactions have been eliminated in consolidation. Each of Mid Penn’s lines of business are part of the same reporting segment, community banking, whose operating results are regularly reviewed and managed by a centralized executive management group. As a result, Mid Penn has only one reportable segment for financial reporting purposes. On January 8, 2018, Mid Penn completed its acquisition of The Scottdale Bank & Trust Company (“Scottdale”), a Pennsylvania bank and trust company, through the merger of Scottdale with and into Mid Penn Bank pursuant to the previously announced Agreement and Plan of Merger, dated as of March 29, 2017, among Mid Penn, Mid Penn Bank and Scottdale. Refer to Note 4, Acquisition of The Scottdale Bank & Trust Company On July 31, 2018, Mid Penn completed its acquisition of First Priority Financial Corp. (“First Priority”), pursuant to the previously announced Agreement and Plan of Merger dated as of January 16, 2018. On July 31, 2018, First Priority was merged with and into Mid Penn, with Mid Penn being the surviving corporation. Refer to Note 5, Acquisition of First Priority Financial Corp., The comparability of Mid Penn’s results of operations for the year ended December 31, 2018, compared to the years ended December 31, 2017 and 2016, in general, have been materially impacted by these two acquisitions, as further described in Note 4 and Note 5. For comparative purposes, the 2017 and 2016 balances have been reclassified to conform to the 2018 presentation. Such reclassifications had no impact on net income.

Nature of Business

Nature of Business	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Business	(2) Nature of Business Mid Penn, through operations conducted by the Bank, engages in a full-service commercial banking and trust business, making available to the community a wide range of financial services, including, but not limited to, mortgage and home equity loans, secured and unsecured commercial and consumer loans, lines of credit, construction financing, farm loans, community development loans, loans to non-profit entities and local government loans, and various types of time and demand deposits including but not limited to, checking accounts, savings accounts, clubs, money market deposit accounts, certificates of deposit, and IRAs. In addition, the Bank provides a full range of trust and wealth management services through its Trust Department. Deposits are insured by the Federal Deposit Insurance Corporation (“FDIC”) to the extent provided by law. The financial services are provided to individuals, partnerships, non-profit organizations, and corporations through its 38 retail banking offices located in Berks, Bucks, Chester, Cumberland, Dauphin, Fayette, Lancaster, Luzerne, Montgomery, Northumberland, Schuylkill and Westmoreland counties in Pennsylvania. A former subsidiary of the Bank, Mid Penn Insurance Services, LLC, was closed effective March 1, 2016 due to a lack of activity within the subsidiary. Mid Penn Insurance Services, LLC was an immaterial subsidiary of the Bank, and was immaterial to Mid Penn’s consolidated results.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(3) Summary of Significant Accounting Policies The accounting and reporting policies of Mid Penn conform with accounting principles generally accepted in the United States of America (“GAAP”) and to general practice within the financial industry. The following is a description of the more significant accounting policies. (a) Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan and lease losses, the assessment of other-than-temporary impairment of investment securities, the valuation of the goodwill for impairment, and the valuation of assets acquired and liabilities assumed in business combinations. (b) Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash on hand, balances due from banks, and federal funds sold, all of which mature within ninety days. (c) Interest-bearing Time Deposits with Other Financial Institutions Interest-bearing time deposits with other financial institutions consist of certificates of deposits in other financial institutions with maturities within one year. (d) Investment Securities Available-for-sale securities include debt securities which are reported at fair value, with unrealized holding gains and losses excluded from earnings being reported, net of deferred income taxes, as a component of accumulated other comprehensive income (loss) within shareholders’ equity. Beginning January 1, 2018, upon adoption of ASU 2016-01, equity securities with readily determinable fair values are stated at fair value within other assets on the balance sheet, with realized and unrealized gains and losses reported in other expense on the income statement. For periods prior to January 1, 2018, equity securities were classified as available-for-sale and stated at fair value within investment securities available-for-sale on the balance sheet, with unrealized gains and losses reported as a separate component of accumulated other comprehensive loss, net of tax. During 2017, Mid Penn added a held-to-maturity pool to its overall investment portfolio of debt securities, which are reported at amortized cost. Unrealized holding gains and losses on held-to-maturity securities are excluded from earnings, and are not a component of accumulated other comprehensive income (loss) within shareholders’ equity. Premiums and discounts on debt securities are amortized as an adjustment to interest income using the interest method. Realized gains and losses on sales of investment securities are computed on the basis of specific identification of the cost of each security. (e) Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are included in loans held for sale and are carried at fair value, as determined by outstanding commitments from investors. Gains and losses on sales of mortgage loans are included in the Consolidated Statements of Income in mortgage banking income. (f) Loans and Allowance for Loan and Lease Losses 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. Residential loans held for sale are carried at fair value and are included in loans held for sale on the balance sheet. 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. These amounts are 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 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 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, generally is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Generally, loans are 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 six 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 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% 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 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 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% 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% 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, 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 all underwriting conditions of the secondary mortgage market, the Bank will evaluate the non-qualifying condition(s) 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 held in the Bank’s portfolio, the interest rate on the residential mortgage typically would be increased to compensate for the added portfolio risk. Consumer, including home equity 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 second mortgages on principal residences. The Bank will lend amounts, which, together with all prior liens, typically may be up to 85% 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. Allowance for Loan and Lease Losses The allowance for credit losses consists of the allowance for loan and lease losses and 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 allowance for loan and lease losses 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 for loan and lease losses, 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, earlier in the event of bankruptcy, or if there is an amount deemed uncollectible. Because all identified losses are immediately charged off, no portion of the allowance for loan and lease losses is restricted to any individual loan or groups of loans, and the entire allowance is available to absorb any and all loan losses. Mid Penn also estimates a reserve for unfunded lending commitments, which 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 loan commitments was $159,000 at December 31, 2018 and $105,000 at December 31, 2017. The allowance for credit losses is maintained at a level considered 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 (“DCF”), 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, and shifting industry or portfolio concentrations. 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 a narrative accompanying the allowance for loan loss calculation. 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 DCF 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. 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 rated as substandard nonaccrual or lower 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. In the event the loan is unsecured, the loan would have been charged-off at the recognition of impairment. Commercial real estate loans rated as 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. The process of charge-off for residential mortgage loans begins upon a loan becoming delinquent for 90 days and 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. Consumer loans (including home equity loans and other consumer loans) are recommended for charge-off after reaching delinquency of 90 days and the loan is not in the process of collection. 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. 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 valuations on all impaired loans collateralized by real estate as soon as practically possible of 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, and will update the allowance impact calculation upon receipt of the updated real estate 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 an estimate of fair 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’s practice of obtaining independent third party market valuations on the subject property as soon as practically possible of the credit being identified as impaired sometimes indicates that the loan to value ratio is sufficient to obviate the need for a specific allocation. 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 twelve months for revaluation by an independent third party. The unallocated component of the allowance for loan and lease losses allocation recognizes the inherent imprecision in our allowance for loan and lease loss methodology, or any alternative methodology, for estimating specific and general loan losses, including the unpredictable timing and amounts of charge-offs, the fact that historical loss averages do not necessarily correlate to unexpected changes to specific-credit or general portfolio cash flows and collateral values which could negatively impact unimpaired portfolio loss factors. Also, t he unallocated component covers several considerations that are not specifically measureable through either the specific and general components. For example, we believe that we could face credit risks and uncertainties, not 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. 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 six consecutive months after modification. Loans classified as troubled debt restructurings are designated as impaired. The allowance calculation methodology includes further 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 for loan and lease losses 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. Acquired Loans Loans that Mid Penn acquires in connection with business combinations are recorded at fair value with no carryover of the existing related allowance for loan losses. Fair value of the 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. On loans determined to purchase credit impaired, 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 the Accounting Standard Codification (“ASC”) 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality Loans acquired through business combinations that do 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 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. (g) Bank Premises and Equipment Land is carried at cost. Buildings, furniture, fixtures, equipment, land improvements, and leasehold improvements are stated at cost less accumulated depreciation. Depreciation is computed by the straight-line method over the estimated useful lives of the assets. Building assets are depreciated using an estimated useful life of five to fifty years. Furniture, fixtures, and equipment are depreciated using an estimated useful life of three to ten years. Land improvements are depreciated over an estimated useful life of ten to twenty years. Leasehold improvements are depreciated using an estimated useful life that is the lesser of the remaining life of the lease or ten to fifteen years. Maintenance and normal repairs are charged to expense when incurred, while major additions and improvements are capitalized. Gains and losses on disposals are reflected in current operations. Bank premises and equipment designated as held for sale are carried at the lower of cost or market value. (h) Restricted Investments in Bank Stocks Restricted investments in bank stocks represent required investments in the common stock of correspondent banks. As a member of the FHLB and Atlantic Community Bankers Bank (“ACBB”), the Bank is required to own restricted stock investments in these correspondent banks, which is carried at cost. The level of stock ownership in the FHLB is adjusted by the FHLB throughout the year based upon the level of outstanding borrowings of the Bank (in general, the higher the amount of borrowings, the higher the amount of FHLB stock ownership requirement). Total dividends received from the FHLB in 2018 and 2017 totaled $275,000 and $114,000, respectively. (i) 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 cost to sell 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 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 December 31, 2018, Mid Penn had $844,000 of residential real estate held in other real estate owned. There was also $211,000 in loans for which formal foreclosure proceedings were in process at December 31, 2018. As of December 31, 2017, Mid Penn had $42,000 of residential real estate held in other real estate owned and $308,000 in loans for which formal foreclosure proceedings were in process. (j) Mortgage Servicing Rights Mortgage servicing rights are recognized as assets upon the sale of a mortgage loan. A portion of the cost of the loan is allocated to the servicing right based upon relative fair value. The fair value of servicing rights is based on the present value of estimated future cash flows of mortgages sold, stratified by rate and maturity date. Assumptions that are incorporated in the valuation of servicing rights include assumptions about prepayment

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2018
Scottdale Bank and Trust Company [Member]
Acquisition	(4) Acquisition of The Scottdale Bank and Trust Company On January 8, 2018, Scottdale merged with and into Mid Penn Bank, with Mid Penn Bank continuing as the surviving entity. Pursuant to the merger agreement, each share of Scottdale common stock issued and outstanding immediately prior to January 8, 2018 converted into the right to receive (i) $1,166 in cash without interest or (ii) 38.88 shares of Mid Penn common stock. As a result, Mid Penn issued 1,878,827 shares of Mid Penn common stock with an acquisition date fair value of approximately $64,181,000, based on the closing stock price of Mid Penn’s common stock on January 8, 2018 of $34.16, and cash of $2,792,000. Including an insignificant amount of cash paid in lieu of fractional shares, the fair value of total consideration paid was $66,973,000. The assets and liabilities of Scottdale were recorded on the consolidated balance sheet of the Company at their estimated fair value as of January 8, 2018, and their results of operations have been included in the consolidated income statement of the Company since such date. Scottdale has been fully integrated into Mid Penn; therefore, the amount of revenue and earnings of Scottdale included in the consolidated income statement since the acquisition date is impracticable to provide. Included in the purchase price was goodwill of $19,178,000 and a core deposit intangible of $4,940,000. The core deposit intangible will be amortized over a ten-year period using a sum of the years’ digits basis. The goodwill will not be amortized, but will be measured annually for impairment or more frequently if circumstances require. Core deposit intangible amortization expense related to the Scottdale acquisition in 2018 totaled $898,000. Core deposit intangible amortization related to the Scottdale acquisition for the five years beginning 2019 through 2023 is estimated to be $808,000, $719,000, $629,000, $539,000, and $449,000 per year, respectively, and $898,000 in total for the four years after 2023. The allocation of the purchase price is as follows: (Dollars in thousands) Assets acquired: Cash and cash equivalents $ 67,817 Investment securities 114,039 Restricted stock 97 Loans 70,769 Goodwill 19,178 Core deposit intangible 4,940 Premises and equipment 1,496 Foreclosed assets 11 Deferred income taxes 1,050 Accrued interest receivable 989 Other assets 266 Total assets acquired 280,652 Liabilities assumed: Deposits 209,981 Accrued interest payable 16 Other liabilities 3,682 Total liabilities assumed 213,679 Consideration paid $ 66,973 Cash paid $ 2,792 Fair value of common stock issued 64,181 The following table summarizes the final estimated fair value of the assets acquired and liabilities and equity assumed in the Scottdale transaction. (Dollars in thousands) Total purchase price (consideration paid) $ 66,973 Net assets acquired: Cash and cash equivalents 67,817 Investment securities 114,039 Restricted stock 97 Loans 70,769 Core deposit intangible 4,940 Premises and equipment 1,496 Foreclosed assets 11 Deferred income taxes 1,050 Accrued interest receivable 989 Other assets 266 Deposits (209,981 ) Accrued interest payable (16 ) Other liabilities (3,682 ) 47,795 Goodwill $ 19,178 In general, factors contributing to goodwill recognized as a result of the Scottdale acquisition include expected cost savings from combined operations, opportunities to expand into several new markets, and growth and profitability potential from the repositioning of short-term investments into higher-yielding loans. The goodwill acquired as a result of the Scottdale acquisition is not tax deductible. The fair value of the financial assets acquired included loans receivable with a net amortized cost basis of $70,769,000. The table below illustrates the fair value adjustments made to the amortized cost basis in order to present a fair value of the loans acquired. (Dollars in thousands) Gross amortized cost basis at January 8, 2018 $ 71,809 Market rate adjustment 601 Credit fair value adjustment on pools of homogeneous loans (995 ) Credit fair value adjustment on impaired loans (646 ) Fair value of purchased loans at January 8, 2018 $ 70,769 The market rate adjustment represents the movement in market interest rates, irrespective of credit adjustments, compared to the contractual rates of the acquired loans. The credit adjustment made on pools of homogeneous loans represents the changes in credit quality of the underlying borrowers from loan inception to the acquisition date. The credit adjustment on impaired loans is derived in accordance with ASC 310-30-30 and represents the portion of the loan balance that has been deemed uncollectible based on our expectations of future cash flows for each respective loan. The information about the acquired Scottdale impaired loan portfolio as of January 8, 2018 is as follows: (Dollars in thousands) Contractually required principal and interest at acquisition $ 2,586 Contractual cash flows not expected to be collected (nonaccretable discount) (1,010 ) Expected cash flows at acquisition 1,576 Interest component of expected cash flows (accretable discount) (305 ) Fair value of acquired loans $ 1,271 The following table presents pro forma information as if the merger between Mid Penn Bank and Scottdale had been completed on January 1, 2017. The pro forma information does not necessarily reflect the results of operations that would have occurred had Mid Penn Bank merged with Scottdale at the beginning of 2017. The supplemental pro forma earnings for the year ended December 31, 2018 exclude both (i) adjustments to estimate the eight day impact of Scottdale due to immateriality and impracticality and (ii) $1,304,000 of merger related costs incurred in 2018 related to the Scottdale acquisition, of which $205,000 was not deductible for federal income tax purposes. Scottdale merger related costs also included approximately $518,000 of severance and retention bonus expenses. The pro forma financial information does not include the impact of possible business model changes, nor does it consider any potential impacts of current market conditions or revenues, expense efficiencies, or other factors. (Dollars in thousands, except per share data) For the Year Ended December 31, 2018 2018 2017 Net interest income after loan loss provision $ 55,434 $ 43,371 Noninterest income 7,462 6,094 Noninterest expense 48,867 38,403 Net income 11,736 8,075 Net income per common share 1.64 1.32
First Priority Financial Corp. [Member]
Acquisition	( 5 ) Acquisition of First Priority Financial Corp. On July 31, 2018, Mid Penn completed its acquisition of First Priority, through the merger of First Priority with and into Mid Penn. In connection with this acquisition, First Priority Bank, First Priority’s wholly-owned bank subsidiary, was merged with and into Mid Penn Bank. Pursuant to the merger agreement between Mid Penn and First Priority, the common shareholders of First Priority received 0.3481 shares of Mid Penn common stock for each share of First Priority common stock owned. Additionally, outstanding options to purchase First Priority common stock at the time of the merger were converted into the right to receive cash at a per-option value of $11.07 less the applicable exercise price, without interest. As a result of the acquisition, Mid Penn’s fulfillment of the merger consideration requirements resulted in (i) the issuance of 2,320,800 shares of Mid Penn common stock with an acquisition date fair value of approximately $76,122,000 based on the closing stock price of Mid Penn’s common stock of $32.80 on July 31, 2018, (ii) the payment $3,801,000 related to cashing out the stock options, (iii) cash paid of $6,000 in lieu of fractional shares, and (iv) the issuance of The assets and liabilities of First Priority were recorded on the consolidated balance sheet of the Company at their estimated fair value as of July 31, 2018, and their results of operations have been included in the consolidated income statement of the Company since such date. First Priority has been fully integrated into Mid Penn; therefore, the amount of revenue and earnings of First Priority included in the consolidated income statement since the acquisition date is impracticable to provide. Included in the purchase price was $39,744,000 of goodwill, a core deposit intangible of $2,832,000, and a trade name intangible of $205,000. The core deposit intangible will be amortized over a ten-year period using a sum of the years’ digits basis. The goodwill will not be amortized, but will be measured annually for impairment or more frequently if circumstances require. Core deposit intangible amortization expense recognized in 2018 related to the First Priority acquisition totaled $215,000. Core deposit intangible amortization expense related to the First Priority acquisition for the five years beginning 2019 through 2023 is estimated to be $493,000, $442,000, $390,000, $339,000 and $288,000 per year, respectively, and $665,000 in total for the four years after 2023. The allocation of the purchase price is as follows: (Dollars in thousands) Assets acquired: Cash and cash equivalents $ 11,398 Investment securities 62,977 Restricted stock 2,237 Loans 511,623 Goodwill 39,744 Core deposit intangible 2,832 Trade name intangible 205 Premises and equipment 1,147 Foreclosed assets 125 Deferred income taxes 3,140 Accrued interest receivable 2,293 Other assets 4,197 Total assets acquired 641,918 Liabilities assumed: Deposits 504,946 Borrowings 49,939 Accrued interest payable 1,073 Other liabilities 2,627 Total liabilities assumed 558,585 Equity acquired: Preferred stock 3,404 Total equity acquired and liabilities assumed 561,989 Consideration paid $ 79,929 Cash paid $ 3,807 Fair value of common stock issued 76,122 Accounting Standards Codification (“ASC”) Topic 805, Business Combinations (Dollars in thousands) Total purchase price (consideration paid) $ 79,929 Net assets acquired: Cash and cash equivalents 11,398 Investment securities 62,977 Restricted stock 2,237 Loans 511,623 Core deposit intangible 2,832 Trade name intangible 205 Premises and equipment 1,147 Foreclosed assets 125 Deferred income taxes 3,140 Accrued interest receivable 2,293 Other assets 4,197 Deposits (504,946 ) Borrowings (49,939 ) Accrued interest payable (1,073 ) Other liabilities (2,627 ) Preferred stock (3,404 ) 40,185 Goodwill $ 39,744 In general, factors contributing to goodwill recognized as a result of the First Priority acquisition include expected cost savings from combined operations, opportunities to expand into several new markets, and growth and profitability potential from the repositioning of short-term investments into higher-yielding loans. The goodwill acquired as a result of the First Priority acquisition is not tax deductible. The fair value of the financial assets acquired included loans receivable with a net amortized cost basis of $511,623,000. The table below illustrates the fair value adjustments made to the amortized cost basis in order to present a fair value of the loans acquired. (Dollars in thousands) Gross amortized cost basis at January 8, 2018 $ 521,644 Market rate adjustment (3,023 ) Credit fair value adjustment on pools of homogeneous loans (6,742 ) Credit fair value adjustment on impaired loans (256 ) Fair value of purchased loans at January 8, 2018 $ 511,623 The market rate adjustment represents the movement in market interest rates, irrespective of credit adjustments, compared to the contractual rates of the acquired loans. The credit adjustment made on pools of homogeneous loans represents the changes in credit quality of the underlying borrowers from loan inception to the acquisition date. The credit adjustment on impaired loans is derived in accordance with ASC 310-30-30 and represents the portion of the loan balance that has been deemed uncollectible based on our expectations of future cash flows for each respective loan. The information about the acquired First Priority impaired loan portfolio as of July 31, 2018 is as follows: (Dollars in thousands) Contractually required principal and interest at acquisition $ 1,855 Contractual cash flows not expected to be collected (nonaccretable discount) (858 ) Expected cash flows at acquisition 997 Interest component of expected cash flows (accretable discount) (125 ) Fair value of acquired loans $ 872 The following table presents pro forma information as if the merger between Mid Penn and First Priority had been completed on January 1, 2017. The pro forma information does not necessarily reflect the results of operations that would have occurred had Mid Penn merged with First Priority at the beginning of 2017. The supplemental pro forma earnings for the year ended December 31, 2018 excludes $3,486,000 of merger related costs related to the First Priority acquisition, of which $714,000 was not deductible for federal income tax purposes. First Priority merger related costs also included approximately $1,475,000 of severance and retention bonus expenses. The pro forma financial information does not include the impact of possible business model changes, nor does it consider any potential impacts of current market conditions or revenues, expense efficiencies, or other factors. (Dollars in thousands, except per share data) For the Year Ended December 31, 2018 2017 Net interest income after loan loss provision $ 66,370 $ 55,082 Noninterest income 7,845 6,748 Noninterest expense 55,689 49,268 Net income 15,469 9,170 Net income per common share 1.84 1.40

Accumulated Other Comprehensive

Accumulated Other Comprehensive (Loss) Income	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Accumulated Other Comprehensive (Loss) Income	( 6 ) Accumulated Other Comprehensive (Loss) Income The components of accumulated other comprehensive (loss) income, net of taxes, are as follows: (Dollars in thousands) Unrealized (Loss) Gain on Securities Defined Plan Liability Accumulated Other Comprehensive (Loss) Income Balance - December 31, 2018 $ (3,242 ) $ 864 $ (2,378 ) Balance - December 31, 2017 $ (2,159 ) $ 85 $ (2,074 )

Restrictions on Cash and Due fr

Restrictions on Cash and Due from Bank Accounts	12 Months Ended
	Dec. 31, 2018
Restrictions On Cash And Due From Bank Accounts [Abstract]
Restrictions on Cash and Due from Bank Accounts	(7 ) Restrictions on Cash and Due from Bank Accounts The Bank is required to maintain reserve balances with the Federal Reserve Bank of Philadelphia. There was no required reserve balance at December 31, 2018 and December 31, 2017 because the Bank had sufficient vault cash available.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2018
Securities Financing Transactions Disclosures [Abstract]
Investment Securities	(8 ) 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, and other factors related to interest rate and resultant prepayment risk changes. Securities to be held to maturity are carried at amortized cost. Realized gains and losses on dispositions are based on the net proceeds and the adjusted book value of the securities sold, using the specific identification method. Unrealized gains and losses on investment securities available for sale are based on the difference between book value and fair value of each security. These gains and losses are credited or charged to other comprehensive income (loss), whereas realized gains and losses flow through Mid Penn’s consolidated statements of income. ASC Topic 320, Investments – Debt Securities In instances when a determination is made that other-than-temporary impairment exists but the investor 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 (loss). In assessing potential other-than-temporary impairment for equity securities, consideration is given to management’s intent and ability to hold the securities until recovery of unrealized losses. Mid Penn had no other-than-temporary impaired debt or equity securities in 2018, 2017, and 2016. Beginning January 1, 2018, upon adoption of ASU 2016-01, equity securities with readily determinable fair values are stated at fair value within other assets on the balance sheet, with realized and unrealized gains and losses reported in other expense on the income statement. For periods prior to January 1, 2018, equity securities were classified as available-for-sale and stated at fair value within investment securities available-for-sale on the balance sheet, with unrealized gains and losses reported as a separate component of accumulated other comprehensive loss, net of tax. Equity securities without readily determinable fair values are recorded at cost less any impairment. At December 31, 2018 and 2017, amortized cost, fair value, and unrealized gains and losses on investment securities are as follows: (Dollars in thousands) Amortized Unrealized Unrealized Fair December 31, 2018 Cost Gains Losses Value Available for sale securities: U.S. Treasury and U.S. government agencies $ 43,270 $ 10 $ 1,708 $ 41,572 Mortgage-backed U.S. government agencies 39,865 — 1,016 38,849 State and political subdivision obligations 30,642 11 1,397 29,256 Corporate debt securities 2,250 — 4 2,246 Total available for sale securities 116,027 21 4,125 111,923 Held to maturity securities: U.S. Treasury and U.S. government agencies $ 16,985 $ 14 $ 143 $ 16,856 Mortgage-backed U.S. government agencies 65,812 46 1,310 64,548 State and political subdivision obligations 84,034 457 842 83,649 Corporate debt securities 1,539 — 10 1,529 Total held to maturity securities 168,370 517 2,305 166,582 Total $ 284,397 $ 538 $ 6,430 $ 278,505 (Dollars in thousands) Amortized Unrealized Unrealized Fair December 31, 2017 Cost Gains Losses Value Available for sale securities: U.S. Treasury and U.S. government agencies $ 40,125 $ — $ 1,395 $ 38,730 Mortgage-backed U.S. government agencies 26,398 2 569 25,831 State and political subdivision obligations 27,775 7 739 27,043 Corporate debt securities 1,350 5 — 1,355 Total available-for-sale debt securities $ 95,648 $ 14 $ 2,703 $ 92,959 Available-for-sale equity securities: Equity securities 550 — 44 506 Total available-for-sale equity securities $ 550 $ — $ 44 $ 506 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 10,984 $ — $ 90 $ 10,894 Mortgage-backed U.S. government agencies 53,472 — 523 52,949 State and political subdivision obligations 36,900 41 301 36,640 Total held-to-maturity debt securities 101,356 41 914 100,483 Total $ 197,554 $ 55 $ 3,661 $ 193,948 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. Equity securities consist of Community Reinvestment Act funds and, as of December 31, 2018 and December 31, 2017, Mid Penn had $492,000 and $506,000, respectively, in equity securities recorded at fair value. Prior to January 1, 2018, equity securities were stated at fair value with unrealized gains and losses reported as a separate component of accumulated other comprehensive loss, net of tax. At December 31, 2017, net unrealized gains of $44,000 had been recognized in accumulated other comprehensive loss. On January 1, 2018, with the adoption of ASU 2016-01, these unrealized gains and losses were reclassified out of accumulated other comprehensive loss and into retained earnings and subsequent changes in fair value are now recognized in net income and the fair value of securities is presented in other assets. During the year ended December 31, 2018, no equity securities were sold and $15,000 of loss related to the change in fair value of the equity securities was recorded in other expense. Investment securities having a fair value of $214,239,000 at December 31, 2018, and $141,465,000 at December 31, 2017, were pledged primarily to secure public deposits. The following table presents gross unrealized losses and fair value of investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2018 and 2017. (Dollars in thousands) Less Than 12 Months 12 Months or More Total December 31, 2018 Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Available for sale securities: U.S. Treasury and U.S. government agencies 0 $ — $ — 21 $ 38,386 $ 1,708 21 $ 38,386 $ 1,708 Mortgage-backed U.S. government agencies 11 16,740 163 19 22,093 853 30 38,833 1,016 State and political subdivision obligations 3 1,751 23 51 24,520 1,374 54 26,271 1,397 Corporate debt securities 2 1,996 4 0 — — 2 1,996 4 Total temporarily impaired available for sale securities 16 20,487 190 91 84,999 3,935 107 105,486 4,125 Held to maturity securities: U.S. Treasury and U.S. government agencies 1 $ 1,985 $ 10 3 $ 8,852 $ 133 4 $ 10,837 $ 143 Mortgage-backed U.S. government agencies 10 16,165 79 35 42,431 1,231 45 58,596 1,310 State and political subdivision obligations 26 11,321 111 77 29,460 731 103 40,781 842 Corporate debt securities 1 1,529 10 0 — — 1 1,529 10 Total temporarily impaired held to maturity securities 38 31,000 210 115 80,743 2,095 153 111,743 2,305 Total 54 $ 51,487 $ 400 206 $ 165,742 $ 6,030 260 $ 217,229 $ 6,430 (Dollars in thousands) Less Than 12 Months 12 Months or More Total December 31, 2017 Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Available for sale securities: U.S. Treasury and U.S. government agencies 3 $ 5,008 $ 184 18 $ 33,722 $ 1,211 21 $ 38,730 $ 1,395 Mortgage-backed U.S. government agencies 4 5,267 75 15 20,497 494 19 25,764 569 State and political subdivision obligations 11 6,144 102 40 19,091 637 51 25,235 739 Corporate debt securities 0 — — 0 — — 0 — — Equity securities 0 — — 1 506 44 1 506 44 Total temporarily impaired available for sale securities 18 16,419 361 74 73,816 2,386 92 90,235 2,747 Held to maturity securities: U.S. Treasury and U.S. government agencies 0 $ — $ — 4 $ 10,894 $ 90 4 $ 10,894 $ 90 Mortgage-backed U.S. government agencies 0 — — 35 52,949 523 35 52,949 523 State and political subdivision obligations 0 — — 77 29,976 301 77 29,976 301 Total temporarily impaired held to maturity securities 0 — — 116 93,819 914 116 93,819 914 Total 18 $ 16,419 $ 361 190 $ 167,635 $ 3,300 208 $ 184,054 $ 3,661 Management evaluates securities for other-than-temporary impairment on a quarterly basis and more frequently when economic or market concerns warrant such evaluation. Consideration is given to the length of time and the extent to which the fair value has been less than cost, and the financial condition and near term prospects of the issuer. In addition, for debt securities, Mid Penn considers (a) whether management has the intent to sell the security, (b) it is more likely than not that management will be required to sell the security prior to its anticipated recovery, and (c) whether management expects to recover the entire amortized cost basis. For equity securities, management considers the intent and ability to hold securities until recovery of unrealized losses. The majority of the investment portfolio is comprised of mortgage-backed U.S. government agencies and state and political subdivision obligations. For the investment securities with an unrealized loss, Mid Penn has concluded, based on its analysis, that the unrealized losses in the investments are primarily caused by the movement of interest rates, and the contractual terms of these investments do not permit the issuer to settle the securities at a price less than the par value of the investment. At December 31, 2018, the majority of the unrealized losses on securities in an unrealized loss position were attributed to state and political subdivision obligations, mortgage-back U.S. government agencies and U.S. Treasury and government agencies. At December 31, 2017, the majority of the unrealized losses on securities in an unrealized loss position were attributed to state and political subdivision obligations and mortgage-back U.S. government agencies. Because Mid Penn does not intend to sell these investments and it is not likely it will be required to sell these investments before a recovery of fair value, which may be maturity, Mid Penn does not consider the securities with unrealized losses to be other-than-temporarily impaired as losses relate primarily to changes in interest rates (based upon the respective securities maturity date relative to the yield curve) and not due to any notable erosion of credit quality. Gross realized gains and losses on sales of available-for-sale securities for the years ended December 31, 2018, 2017, and 2016 are shown in the table below. (Dollars in thousands) For the year ended December 31, 2018 2017 2016 Realized gains $ 150 $ 246 $ 1,927 Realized losses (13 ) (204 ) (881 ) Net gains $ 137 $ 42 $ 1,046 The table below is the maturity distribution of investment securities at amortized cost and fair value at December 31, 2018. (Dollars in thousands) Available for Sale Held to Maturity Amortized Fair Amortized Fair December 31, 2018 Cost Value Cost Value Due in 1 year or less $ — $ — $ 1,086 $ 1,087 Due after 1 year but within 5 years 25,285 24,732 18,745 18,597 Due after 5 years but within 10 years 43,070 41,027 82,727 82,350 Due after 10 years 7,807 7,315 — — 76,162 73,074 102,558 102,034 Mortgage-backed securities 39,865 38,849 65,812 64,548 $ 116,027 $ 111,923 $ 168,370 $ 166,582

Loans and Allowance for Loan an

Loans and Allowance for Loan and Lease Losses	12 Months Ended
	Dec. 31, 2018
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Loans and Allowance for Loan and Lease Losses	(9 ) Loans and Allowance for Loan and Lease Losses The classes of the loan portfolio, summarized by the aggregate pass rating, net of deferred fees and costs of $475,000 and $464,000 as of December 31, 2018 and 2017, respectively, and the classified ratings of special mention, substandard, and doubtful within Mid Penn’s internal risk rating system as of December 31, 2018 and 2017, are noted below: (Dollars in thousands) December 31, 2018 Pass Special Mention Substandard Doubtful Total Commercial and industrial $ 276,690 $ 2,769 $ 7,059 $ — $ 286,518 Commercial real estate 850,150 2,432 8,787 — 861,369 Commercial real estate - construction 141,806 — 367 — 142,173 Lease financing 53 — — — 53 Residential mortgage 251,151 147 2,245 — 253,543 Home equity 70,004 — 92 — 70,096 Consumer 10,315 — — — 10,315 $ 1,600,169 $ 5,348 $ 18,550 $ — $ 1,624,067 (Dollars in thousands) December 31, 2017 Pass Special Mention Substandard Doubtful Total Commercial and industrial $ 182,168 $ 453 $ 5,412 $ — $ 188,033 Commercial real estate 505,397 1,435 8,180 — 515,012 Commercial real estate - construction 61,667 182 487 — 62,336 Lease financing 229 — — — 229 Residential mortgage 97,814 157 1,062 — 99,033 Home equity 41,479 105 309 — 41,893 Consumer 3,868 — — — 3,868 $ 892,622 $ 2,332 $ 15,450 $ — $ 910,404 Impaired loans by loan portfolio class as of December 31, 2018 and 2017 are summarized as follows: December 31, 2018 December 31, 2017 (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 $ — $ — $ — $ — $ 13 $ — Commercial real estate 2,007 2,276 — 3,424 4,056 — Commercial real estate - construction — — — — — — Lease financing — — — — — — Residential mortgage 657 811 — 760 877 — Home equity 30 106 — 260 295 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: * Commercial and industrial $ 28 $ 28 $ — $ — $ — $ — Commercial real estate 1,563 1,563 — 555 555 — Commercial real estate - construction — — — — — — Lease financing — — — — — — Residential mortgage 1,208 1,208 — 306 306 — Home equity 4 4 — — — — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 4,527 $ 4,635 $ 500 $ 4,434 $ 4,460 $ 136 Commercial real estate 721 721 204 1,423 1,589 293 Commercial real estate - construction 367 370 38 487 492 100 Lease financing — — — — — — Residential mortgage — — — — — — Home equity — — — — — — Consumer — — — — — — Total: Commercial and industrial $ 4,555 $ 4,663 $ 500 $ 4,434 $ 4,473 $ 136 Commercial real estate 4,291 4,560 204 5,402 6,200 293 Commercial real estate - construction 367 370 38 487 492 100 Lease financing — — — — — — Residential mortgage 2,019 1,865 — 1,066 1,183 — Home equity 34 110 — 260 295 — * Loans acquired with credit deterioration are presented net of credit fair value adjustment. The average recorded investment of impaired loans and related interest income recognized for the years ended December 31, 2018, 2017, and 2016 are summarized as follows: December 31, 2018 December 31, 2017 December 31, 2016 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ — $ — $ 15 $ — $ 9 $ — Commercial real estate 3,048 3 1,915 279 820 — Commercial real estate - construction — — 164 — 124 — Lease financing — — — — — — Residential mortgage 754 29 890 18 821 21 Home equity 101 — 218 6 75 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ 23 $ — $ — $ — $ — $ — Commercial real estate 1,414 23 651 110 810 164 Commercial real estate - construction — — — — — — Lease financing — — — — — — Residential mortgage 832 — 332 — 378 4 Home equity 1 — — — — — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 4,437 $ — $ 1,779 $ — $ 59 $ — Commercial real estate 541 — 1,446 — 2,177 — Commercial real estate - construction 367 — 488 — 48 — Lease financing — — — — — — Residential mortgage — — — — 14 — Home equity — — — — 32 — Consumer — — — — — — Total: Commercial and industrial $ 4,460 $ — $ 1,794 $ — $ 68 $ — Commercial real estate 5,003 26 4,012 389 3,807 164 Commercial real estate - construction 367 — 652 — 172 — Lease financing — — — — — — Residential mortgage 1,586 29 1,222 18 1,213 25 Home equity 102 — 218 6 107 — Nonaccrual loans by loan portfolio class, including loans acquired with credit deterioration, as of December 31, 2018 and 2017 are summarized as follows: (Dollars in thousands) 2018 2017 Commercial and industrial $ 4,555 $ 4,434 Commercial real estate 4,291 4,902 Commercial real estate - construction 367 487 Residential mortgage 1,502 492 Home equity 34 260 $ 10,749 $ 10,575 If nonaccrual loans and leases had been current in accordance with their original terms and had been outstanding throughout the period or since origination, if held for part of the period, Mid Penn would have recorded interest income on these loans of $536,000, $780,000, and $778,000, in the years ended December 31, 2018, 2017, and 2016, respectively. Mid Penn has no commitments to lend additional funds to borrowers with impaired or nonaccrual loans. The performance and credit quality of the loan portfolio is also monitored by the 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 December 31, 2018 and 2017 are summarized as follows: (Dollars in thousands) December 31, 2018 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Total Past Due Current Total Loans Loans Receivable > 90 Days and Accruing Commercial and industrial: Commercial and industrial $ 17 $ — $ 4,527 $ 4,544 $ 281,946 $ 286,490 $ — Acquired with credit deterioration 23 5 — 28 — 28 — Commercial real estate: Commercial real estate 685 — 458 1,143 858,663 859,806 — Acquired with credit deterioration 29 — 1,534 1,563 — 1,563 — Commercial real estate - construction: Commercial real estate - construction — — 367 367 141,806 142,173 Lease financing: Lease financing — — — — 53 53 — Residential mortgage: Residential mortgage 461 - 277 738 251,597 252,335 — Acquired with credit deterioration 19 57 913 989 219 1,208 — Home equity: Home equity 166 22 25 213 69,879 70,092 — Acquired with credit deterioration — — 4 4 — 4 — Consumer: Consumer 57 5 — 62 10,253 10,315 — Total $ 1,457 $ 89 $ 8,105 $ 9,651 $ 1,614,416 $ 1,624,067 $ — (Dollars in thousands) December 31, 2017 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Total Past Due Current Total Loans Loans Receivable > 90 Days and Accruing Commercial and industrial: Commercial and industrial $ 4,439 $ 16 $ — $ 4,455 $ 183,578 $ 188,033 $ — Commercial real estate: Commercial real estate — — 3,669 3,669 510,788 514,457 — Acquired with credit deterioration 500 — 55 555 — 555 — Commercial real estate - construction: Commercial real estate - construction — — 487 487 61,849 62,336 — Lease financing: Lease financing — — — — 229 229 — Residential mortgage: Residential mortgage 310 467 177 954 97,773 98,727 — Acquired with credit deterioration — 31 193 224 82 306 — Home equity: Home equity 54 98 250 402 41,491 41,893 — Consumer: Consumer 3 — — 3 3,865 3,868 — Total $ 5,306 $ 612 $ 4,831 $ 10,749 $ 899,655 $ 910,404 $ - Activity in the allowance for loan and lease losses for the years ended December 31, 2018, 2017, and 2016, and the recorded investment in loans receivable as of December 31, 2018, 2017, and 2016 are as follows: (Dollars in thousands) December 31, 2018 Commercial and industrial Commercial real estate Commercial real estate - construction Lease financing Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance $ 1,795 $ 4,435 $ 178 $ — $ 428 $ 423 $ 3 $ 344 $ 7,606 Charge-offs (142 ) (64 ) (40 ) — (60 ) (185 ) (37 ) — (528 ) Recoveries 1 808 — — — 1 9 — 819 Provisions 737 (476 ) (63 ) — 85 289 32 (104 ) 500 Ending balance 2,391 4,703 75 — 453 528 7 240 8,397 Ending balance: individually evaluated for impairment 500 204 38 — — — — — 742 Ending balance: collectively evaluated for impairment $ 1,891 $ 4,499 $ 37 $ — $ 453 $ 528 $ 7 $ 240 $ 7,655 Loans receivable: Ending balance $ 286,518 $ 861,369 $ 142,173 $ 53 $ 253,543 $ 70,096 $ 10,315 $ — $ 1,624,067 Ending balance: individually evaluated for impairment 4,527 2,728 367 — 811 30 — — 8,463 Ending balance: acquired with credit deterioration 28 1,563 — — 1,208 4 — — 2,803 Ending balance: collectively evaluated for impairment $ 281,963 $ 857,078 $ 141,806 $ 53 $ 251,524 $ 70,062 $ 10,315 $ — $ 1,612,801 (Dollars in thousands) December 31, 2017 Commercial and industrial Commercial real estate Commercial real estate - construction Lease financing Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance $ 1,580 $ 4,323 $ 144 $ 1 $ 541 $ 379 $ 3 $ 212 $ 7,183 Charge-offs (25 ) (322 ) — — (102 ) (20 ) (28 ) — (497 ) Recoveries 26 553 — — 4 5 7 — 595 Provisions 214 (119 ) 34 (1 ) (15 ) 59 21 132 325 Ending balance 1,795 4,435 178 — 428 423 3 344 7,606 Ending balance: individually evaluated for impairment 136 293 100 — — — — — 529 Ending balance: collectively evaluated for impairment $ 1,659 $ 4,142 $ 78 $ — $ 428 $ 423 $ 3 $ 344 $ 7,077 Loans receivable: Ending balance $ 188,033 $ 515,012 $ 62,336 $ 229 $ 99,033 $ 41,893 $ 3,868 $ — $ 910,404 Ending balance: individually evaluated for impairment 4,434 4,847 487 — 760 260 — — 10,788 Ending balance: acquired with credit deterioration — 555 — — 306 — — — 861 Ending balance: collectively evaluated for impairment $ 183,599 $ 509,610 $ 61,849 $ 229 $ 97,967 $ 41,633 $ 3,868 $ — $ 898,755 (Dollars in thousands) December 31, 2016 Commercial and industrial Commercial real estate Commercial real estate - construction Lease financing Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning Balance $ 1,393 $ 3,552 $ 153 $ 1 $ 534 $ 317 $ 12 $ 206 $ 6,168 Charge-offs (820 ) (216 ) — — (4 ) (25 ) (42 ) — (1,107 ) Recoveries 4 211 — — 26 — 11 — 252 Provisions 1,003 776 (9 ) — (15 ) 87 22 6 1,870 Ending balance 1,580 4,323 144 1 541 379 3 212 7,183 Ending balance: individually evaluated for impairment 6 711 72 — 68 1 — — 858 Ending balance: collectively evaluated for impairment $ 1,574 $ 3,612 $ 72 $ 1 $ 473 $ 378 $ 3 $ 212 $ 6,325 Loans receivable: Ending balance $ 172,518 $ 446,524 $ 54,376 $ 425 $ 99,457 $ 37,608 $ 3,016 $ — $ 813,924 Ending balance: individually evaluated for impairment 60 3,246 860 — 916 140 — — 5,222 Ending balance: acquired with credit deterioration — 842 — — 389 — — — 1,231 Ending balance: collectively evaluated for impairment $ 172,458 $ 442,436 $ 53,516 $ 425 $ 98,152 $ 37,468 $ 3,016 $ — $ 807,471 The recorded investments in troubled debt restructured loans at December 31, 2018 and 2017 are as follows: (Dollars in thousands) Pre-Modification Post-Modification December 31, 2018 Outstanding Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 4,110 $ 4,460 $ 4,302 Commercial real estate 2,940 2,841 2,201 Residential mortgage 677 675 516 Home equity 14 14 1 $ 7,741 $ 7,990 $ 7,020 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2017 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 4,110 $ 4,460 $ 4,434 Commercial real estate 5,735 5,581 4,593 Residential mortgage 677 675 540 Home equity 14 14 4 $ 10,536 $ 10,730 $ 9,571 Mid Penn’s troubled debt restructured loans at December 31, 2018 totaled $7,020,000, and included four loans totaling $517,000 representing accruing impaired loans to unrelated borrowers in compliance with the terms of the modification, with three loans being accruing impaired residential mortgages to unrelated borrowers totaling $516,000 and one loan being an accruing impaired home equity loan of $1,000. The remaining $6,503,000 of troubled debt restructurings was attributable to ten loans among five relationships which were classified as nonaccrual impaired based upon a collateral evaluation in accordance with the guidance on impaired loans. Two large relationships accounted for $5,463,000 of the total $6,503,000 in nonaccrual impaired troubled debt restructured loans. As of December 31, 2018, 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 2018. At December 31, 2017, Mid Penn’s troubled debt restructured loans totaled $9,571,000, and included four loans totaling $544,000 representing accruing impaired loans in compliance with the terms of the modification, with three loans being accruing impaired residential mortgages to unrelated borrowers totaling $540,000, and one loan being an accruing impaired home equity loan of $4,000. The remaining $9,027,000 of troubled debt restructured loans is attributable to fifteen loans among seven relationships, which were classified as nonaccrual impaired based upon a collateral evaluation in accordance with the guidance on impaired loans. Two large relationships accounted for $7,284,000 of the $9,027,000 in nonaccrual impaired troubled debt restructured loans. As of December 31, 2017, there was $66,000 of charge-offs associated with troubled debt restructured loans while under a forbearance agreement. As of December 31, 2017, 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 2017. Mid Penn entered into forbearance agreements on all loans currently classified as troubled debt restructurings and all of these agreements have resulted in additional principal repayment. The terms of these forbearance agreements vary whereby principal payments have been decreased, interest rates have been reduced and/or the loan will be repaid as collateral is sold. There was one loan modified in 2018, ten loans modified in 2017, and three loans modified in 2016 that resulted in troubled debt restructurings. The following table summarizes the loans whose terms have been modified resulting in troubled debt restructurings during the years ended December 31, 2018, 2017, and 2016. (Dollars in thousands) Pre-Modification Post-Modification December 31, 2018 Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial real estate 1 $ 270 $ 270 $ 266 1 $ 270 $ 270 $ 266 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2017 Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial 1 $ 4,110 $ 4,460 $ 4,434 Commercial real estate 9 3,212 3,150 3,140 10 $ 7,322 $ 7,610 $ 7,574 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2016 Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial 2 $ 934 $ 914 $ 914 Residential mortgage 1 68 68 68 3 $ 1,002 $ 982 $ 982 The following table provides activity for the accretable yield of purchased impaired loans for the year ended December 31, 2018. (Dollars in thousands) Accretable yield, January 1, 2018 $ 67 Acquisition of impaired loans $ 430 Accretable yield amortized to interest income (188 ) Accretable yield, December 31, 2018 $ 309 The Bank has granted loans to certain of its executive officers, directors, and their related interests. The aggregate amount of these loans was $17,843,000 and $15,163,000 at December 31, 2018 and 2017, respectively. During 2018, $6,458,000 of new loans and advances were extended, $582,000 of loans were assumed from First Priority as a result of the addition of new directors, and repayments totaled $4,360,000. None of these loans were past due, in nonaccrual status, or restructured at December 31, 2018.

Bank Premises and Equipment

Bank Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Bank Premises and Equipment	(10 ) Bank Premises and Equipment At December 31, 2018 and 2017, bank premises and equipment are as follows: (Dollars in thousands) 2018 2017 Land $ 4,305 $ 3,564 Buildings 19,490 8,632 Furniture, fixtures, and equipment 11,837 8,262 Leasehold improvements 1,363 1,126 Construction in progress 83 4,467 Total cost 37,078 26,051 Less accumulated depreciation (11,775 ) (9,883 ) Total bank premises and equipment $ 25,303 $ 16,168 There were no premises and equipment classified as held for sale as of December 31, 2018 or 2017. As of December 31, 2016, assets held-for-sale consisted of three full service retail banking properties. These properties were transferred from land and buildings to assets held for sale during 2016 due to Mid Penn’s intent to sell them during January 2017. An impairment charge of $142,000 was recorded on one of the properties at December 31, 2016 and included as a separate component in noninterest expense on the Consolidated Statements of Income. On January 20, 2017, Mid Penn consummated the sale of the three properties for an aggregate purchase price of $2,240,000, which exceeds Mid Penn’s combined carrying value by approximately $346,000. Two of the properties are being leased back by Mid Penn for a period of at least 15 years, and the respective gains on the sales of those properties will be recognized over the life of the leases. As of December 31, 2017, construction in process included (i) a commercial building and related improvements in Harrisburg, (ii) two vacant and undeveloped lots adjacent to the commercial building; and (iii) land, building, and improvements related to a newly constructed branch in Halifax, PA. The commercial building and adjacent lots in Harrisburg, PA were being renovated as of December 31, 2017 to serve as an administrative center for the Mid Penn, replacing two administrative offices which were previously leased. The renovations were substantially completed in February 2018, and Mid Penn employees took occupancy at that time. The new full-service office in Halifax, PA opened on January 8, 2018. Depreciation expense was $2,395,000 in 2018, $1,464,000 in 2017, and $1,658,000 in 2016. On January 1, 2019, as a result of the adoption of ASU 2016-02, Leases Recent Accounting Pronouncements Operating Leases: As of December 31, 2018, Mid Penn was obligated to utilize certain premises under certain non-cancelable operating leases, which expire at various dates through the year ending December 31, 2035. Many of these leases contain renewal options and certain leases contain escalation clauses calling for rentals to be adjusted for increased real estate taxes and other operating expenses, or proportionately adjusted for increases in consumer or other price indices. Three of Mid Penn’s operating leases are with related parties. The rental expense paid to related parties was $320,000 in 2018, $352,000 in 2017, and $348,000 in 2016. The future minimum payments to related parties are $208,000 (2019), $214,000 (2020), $186,000 (2021), $175,000 (2022), $175,000 in 2023, and $1,700,000 thereafter. In 2016, Mid Penn entered into two subleasing agreements with escalation clauses to two unrelated parties. The first sublease agreement began on April 1, 2016, while the second sublease began on July 1, 2016. Both subleases end on March 31, 2021. The following summary reflects the future minimum rental payments by year under Mid Penn’s operating leases as of December 31, 2018, including a breakdown of the sublease rental income and future minimum payments owed to related parties. (Dollars in thousands) Lease Obligation Sublease Rental Income Net Rental Expense 2019 2,171 81 2,090 2020 1,970 81 1,889 2021 1,603 20 1,583 2022 1,464 — 1,464 2023 1,245 — 1,245 thereafter 6,691 — 6,691 $ 15,144 $ 182 $ 14,962 Rental expense in connection with leases was $1,433,000 in 2018, $1,087,000 in 2017, $716,000 in 2016.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposits	(1 1 ) Deposits At December 31, 2018 and 2017, time deposits amounted to $486,329,000 and $201,623,000, respectively. Interest expense on certificates of deposit amounted to $4,906,000, $2,570,000, and $2,156,000 for the years ended December 31, 2018, 2017, and 2016, respectively. The aggregate amount of demand deposit overdrafts that were reclassified as loans were $356,000 at December 31, 2018, compared to $136,000 as of December 31, 2017. Time deposits at December 31, 2018, mature as follows: (Dollars in thousands) Time Deposits Less than $250,000 $250,000 or more Maturing in 2019 $ 199,257 $ 70,445 Maturing in 2020 129,223 8,618 Maturing in 2021 42,965 1,796 Maturing in 2022 19,370 2,499 Maturing in 2023 10,566 770 Maturing thereafter 820 — $ 402,201 $ 84,128 Brokered deposits included in the time deposit totals equaled $110,218,000 at December 31, 2018 and $19,447,000 at December 31, 2017. Deposits and other funds from related parties held by Mid Penn at December 31, 2018 and 2017 amounted to $27,399,000 and $20,262,000, respectively.

Short-term Borrowings

Short-term Borrowings	12 Months Ended
	Dec. 31, 2018
Short Term Borrowings [Abstract]
Short-term Borrowings	(12) Short-term Borrowings At December 31, 2018 and 2017, Mid Penn had short-term borrowings totaling $43,100,000 and $34,611,000, respectively, consisting 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 real estate secured loans totaling $507,462,000 within the Bank’s portfolio. As of December 31, 2018, the Bank had short-term borrowing capacity from the FHLB up to the Bank’s unused borrowing capacity of $464,362,000 upon satisfaction of any stock purchase requirements of the FHLB. The Bank also has unused overnight lines of credit with other correspondent banks amounting to $15,000,000 at December 31, 2018. No draws have been made on these lines of credit and on December 31, 2018 and 2017, the balance was zero. The following table outlines Mid Penn’s various sources of short-term borrowed funds at or for the years ended December 31, 2018 and 2017. The maximum balance represents the highest indebtedness for each category of short-term borrowed funds at any month-end during each of the years shown. (Dollars in thousands) December 31, 2018 2017 Federal funds purchased: Balance at year end $ — $ 34,511 Weighted average rate at year end 0 % 1.54 % Maximum month-end balance $ 35,050 $ 41,610 Average daily balance during the year $ 7,049 $ 7,961 Weighted average rate during the year 2.24 % 1.39 % FHLB short-term borrowings: Balance at year end $ 43,100 $ — Weighted average rate at year end 2.74 % 0.00 % Maximum month-end balance $ 43,100 $ — Average daily balance during the year $ 1,784 $ — Weighted average rate during the year 2.74 % 0.00 %

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2018
Maturities Of Long Term Debt [Abstract]
Long-term Debt	(1 3 ) Long-term Debt The Bank is a member of the FHLB, and through its membership, the Bank can access a number of credit products which are utilized to provide liquidity. As of December 31, 2018 and 2017, the Bank had long-term debt outstanding in the amount of $48,024,000 and $12,352,000, respectively, consisting of FHLB fixed rate instruments. The obligations 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 totaling $507,462,000. The following table presents a summary of long-term debt as of December 31, 2018 and December 31, 2017. (Dollars in thousands) At December 31, 2018 2017 Due July 2019, 1.64% $ 2,000 $ — Due December 2019, 1.87% 10,000 10,000 Due January 2020, 3.00% 5,000 — Due February 2020, 3.01% 5,000 — Due March 2020, 3.02% 5,000 — Due April 2020, 3.03% 5,000 — Due June 2020, 1.72% 2,000 — Due August 2020, 3.05% 5,000 — Due October 2020, 3.06% 5,000 — Due December 2020, 1.78% 2,000 — Due August 2026, 4.80% 2,076 2,295 Due February 2027, 6.71% 52 57 48,128 12,352 Less: fair value adjustment on debt assumed from acquisitions 104 — $ 48,024 $ 12,352 The aggregate principal amounts due on long-term debt subsequent to December 31, 2018 are $12,234,000 (2019), $34,246,000 (2020), $258,000 (2021), $271,000 (2022), $284,000 (2023) and $835,000 thereafter.

Subordinated Debt

Subordinated Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Subordinated Debt	(1 4 ) Subordinated Debt 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. The 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 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 will 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 times be less than 5.0%. Interest will be 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. As of December 31, 2018, related parties held $1,450,000 of the 2017 Notes. Subordinated Debt Issued December 2015 On December 9, 2015, Mid Penn sold $7,500,000 aggregate principal amount of its Subordinated Notes due 2025 (the “2015 Notes”). The 2015 Notes are treated as Tier 2 capital for regulatory capital purposes. The 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 times be less than 4.0%. Interest will be payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, and began on January 1, 2016. The 2015 Notes will mature on December 9, 2025 and are redeemable in whole or in part, without premium or penalty, at any time on or after December 9, 2020, and prior to December 9, 2025. Additionally, Mid Penn may redeem the 2015 Notes in whole at any time, or in part from time to time, upon at least 30 days’ notice if: (i) a change or prospective change in law occurs that could prevent Mid Penn from deducting interest payable on the 2015 Notes for U.S. federal income tax purposes; (ii) an event occurs that precludes the 2015 Notes from being recognized as Tier 2 capital for regulatory capital purposes; or (iii) Mid Penn becomes required to register as an investment company under the Investment Company Act of 1940, as amended, in each case at 100% of the principal amount of the 2015 Notes, plus accrued and unpaid interest thereon to but excluding the date of redemption. Holders of the 2015 Notes may not accelerate the maturity of the 2015 Notes, except upon Mid Penn’s or Mid Penn Bank, its principal banking subsidiary’s, bankruptcy, insolvency, liquidation, receivership or similar event. As of December 31, 2018, related parties held $1,930,000 of the 2015 Notes.

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement	(1 5 ) 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. The guidance also includes information on identifying circumstances when a transaction may not be considered orderly. 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. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the 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. 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 for the years ended December 31, 2018 or 2017. The following tables illustrate the assets measured at fair value on a recurring basis segregated by hierarchy fair value levels: Fair value measurements at December 31, 2018 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2018 (Level 1) (Level 2) (Level 3) Available-for-sale debt securities: U.S. Treasury and U.S. government agencies $ 41,572 $ — $ 41,572 $ — Mortgage-backed U.S. government agencies 38,849 — 38,849 — State and political subdivision obligations 29,256 — 29,256 — Corporate debt securities 2,246 — 2,246 — Other assets: Equity securities 492 492 — — $ 112,415 $ 492 $ 111,923 $ — Fair value measurements at December 31, 2017 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2017 (Level 1) (Level 2) (Level 3) Available-for-sale debt securities: U.S. Treasury and U.S. government agencies $ 38,730 $ — $ 38,730 $ — Mortgage-backed U.S. government agencies 25,831 — 25,831 — State and political subdivision obligations 27,043 — 27,043 — Corporate debt securities 1,355 — 1,355 — Other assets: Equity securities 506 506 — — $ 93,465 $ 506 $ 92,959 $ — 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 December 31, 2018 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2018 (Level 1) (Level 2) (Level 3) Impaired Loans $ 4,935 $ — $ — $ 4,935 Foreclosed Assets Held for Sale 581 — — 581 Fair value measurements at December 31, 2017 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2017 (Level 1) (Level 2) (Level 3) Impaired Loans $ 6,090 $ — $ — $ 6,090 Foreclosed Assets Held for Sale — — — — 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 December 31, 2018 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 4,935 Appraisal of collateral (a), (c) Appraisal adjustments (b) 26% -100% 40% Foreclosed Assets Held for Sale 581 Appraisal of collateral (a), (c) Appraisal adjustments (b) 17% - 17% 17% (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements December 31, 2017 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 6,090 Appraisal of collateral (a), (c) Appraisal adjustments (b) 6% - 51% 28% Foreclosed Assets Held for Sale — Appraisal of collateral (a), (c) Appraisal adjustments (b) 0% - 0% 0% (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. (c) Includes qualitative adjustments by management and estimated liquidation expenses. The following methodologies and assumptions were used to estimate the fair value of certain assets and liabilities: Securities Available for Sale: The fair value of 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. Impaired Loans: Mid Penn’s rating system assumes any loans classified as substandard nonaccrual 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. It is Mid Penn’s policy to obtain updated third party valuations on all substandard nonaccrual loans collateralized by real estate within 30 days of the credit being classified as impaired. Prior to receipt of the updated real estate valuation Mid Penn will use any existing real estate valuation 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 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. Foreclosed Assets Held for Sale: Assets included in foreclosed assets held for sale are carried at fair value, less costs to sell, 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 December 31, 2018 and 2017. (Dollars in thousands) December 31, 2018 December 31, 2017 Carrying Fair Carrying Fair Value Value Value Value Financial assets: Cash and cash equivalents $ 40,065 $ 40,065 $ 23,514 $ 23,514 Available for sale investment securities 111,923 111,923 93,465 93,465 Held to maturity investment securities 168,370 166,582 101,356 100,483 Loans held for sale 1,702 1,702 1,040 1,040 Equity securities 492 492 506 506 Net loans and leases 1,615,670 1,622,287 902,798 917,081 Restricted investment in bank stocks 6,646 6,646 4,384 4,384 Accrued interest receivable 8,244 8,244 4,564 4,564 Mortgage servicing rights 101 101 126 126 Financial liabilities: Deposits $ 1,726,026 $ 1,725,674 $ 1,023,568 $ 1,026,830 Short-term borrowings 43,100 43,100 34,611 34,611 Long-term debt 48,024 44,585 12,352 11,692 Subordinated debt 27,082 24,881 17,338 17,358 Accrued interest payable 2,262 2,262 645 645 The Bank’s outstanding and unfunded credit commitments and financial standby letters of credit were deemed to have no significant fair value as of December 31, 2018 and 2017. The following presents the carrying amount, fair value, and placement in the fair value hierarchy of Mid Penn’s financial instruments as of December 31, 2018 and 2017. Carrying values approximate fair values for cash and cash equivalents, interest-bearing time balances with other financial institutions, 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, these instruments are Level 2 Inputs. The following tables exclude financial instruments for which the placement in the fair value hierarchy has been disclosed elsewhere or for which the carrying amount approximates fair value. Fair Value Measurements (Dollars in thousands) Quoted Prices Significant in Active Markets Other Significant for Identical Assets Observable Unobservable Carrying Fair or Liabilities Inputs Inputs December 31, 2018 Amount Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 168,370 $ 166,582 $ — $ 166,582 $ — Net loans and leases 1,615,670 1,622,287 — — 1,622,287 Financial instruments - liabilities Deposits $ 1,726,026 $ 1,725,674 $ — $ 1,725,674 $ — Long-term debt 48,024 44,585 — 44,585 — Subordinated debt 27,082 24,881 — 24,881 — Fair Value Measurements (Dollars in thousands) Quoted Prices Significant in Active Markets Other Significant for Identical Observable Unobservable Carrying Fair or Liabilities Inputs Inputs December 31, 2017 Amount Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 101,356 $ 100,483 $ — $ 100,483 $ — Net loans and leases 902,798 917,081 — — 917,081 Financial instruments - liabilities Deposits $ 1,023,568 $ 1,026,830 $ — $ 1,026,830 $ — Long-term debt 12,352 11,692 — 11,692 — Subordinated debt 17,338 17,358 — 17,358 —

Postretirement Benefit Plans

Postretirement Benefit Plans	12 Months Ended
	Dec. 31, 2018
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]
Postretirement Benefit Plans	(1 6 ) Postretirement Benefit Plans Mid Penn has an unfunded noncontributory defined benefit plan for directors, which provides defined benefits based on the respective director’s years of service, as well as a postretirement healthcare and life insurance benefit plan, which is noncontributory, covering certain full-time employees. Mid Penn also assumed a noncontributory defined benefit pension plan as a result of the acquisition of Scottdale on January 8, 2018. Service costs related to plans benefiting Mid Penn employees 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 settlement gain are reported as a component of other income. Service costs, interest costs, and amortization of prior service costs related to plans benefiting Mid Penn’s nonemployee directors are reported as a component of director fees and benefits expense within the other expense line item on the Consolidated Statement of Income. The accrued benefit liability, related income statement impacts, and other significant aspects of the plans are detailed below. ( a ) Life Insurance Full-time employees who had at least ten years of service as of January 1, 2008 and retire with the Bank after age 55 and at least 20 years of service are eligible for term life insurance coverage. The insurance amount will be $50,000 until age 65. After age 65, the insurance amount will decrease by $5,000 per year until age 74. Thereafter, the insurance amount will be $5,000. ( b ) Health and Life Benefit Plan Full-time employees who had at least 10 years of service as of January 1, 2008 and who retire at age 55 or later, after completion of at least 20 years of service, are eligible for medical benefits. Medical benefits are provided for up to five years after retirement. Employees who retired prior to December 31, 2015 may elect the least expensive single coverage in the employer’s group medical plan. If the retiree becomes eligible for Medicare during the five year duration of coverage, the Bank will pay, at its discretion, premiums for single 65-special coverage or similar supplemental coverage. For those employees who retired between September 18, 2015 and December 31, 2015, the Bank will only pay up to $5,000 (grossed up by 36.79 percent as of December 31, 2018) towards such medical coverage. Employees who retired after December 31, 2015 may not participate in the employer’s group medical plan. Instead, the Bank will reimburse the retiree for up to $5,000 in medical costs. The following tables provide a reconciliation of the changes in the plan’s health and life insurance benefit obligations and fair value of plan assets for the years ended December 31, 2018 and 2017, and a statement of the funded status at December 31, 2018 and 2017. (Dollars in thousands) December 31, Change in benefit obligations: 2018 2017 Benefit obligations, January 1 $ 508 $ 540 Service cost 4 4 Interest cost 17 20 Change in experience (38 ) (11 ) Change in assumptions (17 ) 20 Change due to plan amendment $ 60 — Benefit payments (59 ) (65 ) Benefit obligations, December 31 $ 475 $ 508 Change in fair value of plan assets: Fair value of plan assets, January 1 $ — $ — Employer contributions 59 65 Benefit payments (59 ) (65 ) Fair value of plan assets, December 31 $ — $ — Funded status at year end $ (475 ) $ (508 ) Mid Penn has capped the benefit to future retirees under its post-retirement health benefit plan. Employees who had achieved ten years of service as of January 1, 2008 and subsequently retire after at least 20 years of service are eligible for reimbursement of major medical insurance premiums up to $5,000, if the employee has not yet reached age 65. Upon becoming eligible for Medicare, Mid Penn will reimburse up to $5,000 in premiums for Medicare Advantage or a similar supplemental coverage. The maximum reimbursement period will not exceed five years regardless of retirement age and will end upon the participant obtaining other employment where major medical coverage is available or the participant’s death. The amount recognized in other liabilities on the consolidated balance sheets at December 31, 2018 and 2017, is as follows: (Dollars in thousands) 2018 2017 Accrued benefit liability $ 475 $ 508 The amounts recognized in accumulated other comprehensive loss consist of: (Dollars in thousands) December 31, 2018 2017 Net gain, pretax $ (76 ) $ (22 ) Net prior service cost, pretax (89 ) (174 ) The accumulated benefit obligation for health and life insurance plans was $475,000 and $508,000 at December 31, 2018 and 2017, respectively. There will be $25,000 in estimated prior service costs amortized from accumulated other comprehensive income into net periodic benefit cost during 2019. The components of net periodic postretirement benefit (income) cost for 2018, 2017 and 2016 are as follows: (Dollars in thousands) 2018 2017 2016 Service cost $ 4 $ 4 $ 4 Interest cost 17 20 23 Amortization of prior service cost (25 ) (35 ) (35 ) Amortization of net (gain) or loss (1 ) — — Net periodic postretirement benefit (income) cost $ (5 ) $ (11 ) $ (8 ) Assumptions used in the measurement of Mid Penn’s benefit obligations at December 31, 2018 and 2017 are as follows: Weighted-average assumptions: 2018 2017 Discount rate 4.00 % 3.50 % Rate of compensation increase 3.00 % 2.50 % Assumptions used in the measurement of Mid Penn’s net periodic benefit cost for the years ended December 31, 2018, 2017 and 2016 are as follows: Weighted-average assumptions: 2018 2017 2016 Discount rate 3.50 % 4.00 % 4.25 % Rate of compensation increase 2.50 % 3.00 % 3.25 % Assumed health care cost trend rates at December 31, 2018, 2017 and 2016 are as follows: 2018 2017 2016 Health care cost trend rate assumed for next year 5.50 % 6.00 % 6.00 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 5.40 % 5.40 % 5.50 % Year that the rate reaches the ultimate trend rate 2022 2024 2018 Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. At December 31, 2018, a one-percentage-point change in assumed health care cost trend rates would have the following effects: (Dollars in thousands) One-Percentage Point Increase Decrease Effect on total of service and interest cost $ — $ — Effect on accumulated postretirement benefit obligation 6 (9 ) Mid Penn expects to contribute $60,000 to its life and health benefit plans in 2019. The following table shows the estimated benefit payments for future periods. (Dollars in thousands) 1/1/2019 to 12/31/2019 $ 60 1/1/2020 to 12/31/2020 50 1/1/2021 to 12/31/2021 34 1/1/2022 to 12/31/2022 38 1/1/2023 to 12/31/2023 31 1/1/2024 to 12/31/2028 160 (c) Directors’ Retirement Plan Mid Penn has an unfunded defined benefit retirement plan for directors with benefits based on years of service. The adoption of this plan generated unrecognized prior service cost of $274,000, which had been amortized over the expected future years of service of active directors, of which $22,000 was recognized in 2018 and was fully amortized as of December 31, 2018. The following tables provide a reconciliation of the changes in the directors’ defined benefit plan’s benefit obligations and fair value of plan assets for the years ended December 31, 2018 and 2017, and a statement of the status at December 31, 2018 and 2017. This Plan is unfunded. (Dollars in thousands) December 31, Change in benefit obligations: 2018 2017 Benefit obligations, January 1 $ 1,116 $ 1,122 Service cost 36 35 Interest cost 38 43 Actuarial gain (loss) 5 6 Change in assumptions (5 ) 2 Benefit payments (90 ) (92 ) Benefit obligations, December 31 $ 1,100 $ 1,116 Change in fair value of plan assets: Fair value of plan assets, January 1 $ — $ — Employer contributions 90 92 Benefit payments (90 ) (92 ) Fair value of plan assets, December 31 $ — $ — Funded status at year end $ (1,100 ) $ (1,116 ) Amounts recognized in other liabilities on the consolidated balance sheet at December 31, 2018 and 2017 are as follows: (Dollars in thousands) 2018 2017 Accrued benefit liability $ 1,100 $ 1,116 Amounts recognized in accumulated other comprehensive loss consist of: (Dollars in thousands) December 31, 2018 2017 Net prior service cost, pretax $ — $ 22 Net loss, pretax 67 67 The accumulated benefit obligation for the retirement plan was $1,100,000 at December 31, 2018 and $1,116,000 at December 31, 2017. No estimated prior service costs will be amortized from accumulated other comprehensive loss into net periodic benefit cost during 2019 as the amount is fully amortized. The components of net periodic retirement cost for 2018, 2017 and 2016 are as follows: (Dollars in thousands) 2018 2017 2016 Service cost $ 36 $ 35 $ 34 Interest cost 38 43 46 Amortization of prior-service cost 22 22 22 Net periodic retirement cost $ 96 $ 100 $ 102 Assumptions used in the measurement of Mid Penn’s benefit obligations at December 31, 2018 and 2017 are as follows: Weighted-average assumptions: 2018 2017 Discount rate 4.00 % 3.50 % Change in consumer price index 2.00 % 1.50 % Assumptions used in the measurement of Mid Penn’s net periodic benefit cost for the years ended December 31, 2018, 2017 and 2016 are as follows: Weighted-average assumptions: 2018 2017 2016 Discount rate 4.00 % 4.00 % 4.25 % Change in consumer price index 2.00 % 1.50 % 2.25 % Mid Penn expects to contribute $95,000 to its retirement plan in 2019. The following table shows the estimated benefit payments for future periods. (Dollars in thousands) 1/1/2019 to 12/31/2019 $ 95 1/1/2020 to 12/31/2020 97 1/1/2021 to 12/31/2021 108 1/1/2022 to 12/31/2022 107 1/1/2023 to 12/31/2024 106 1/1/2024 to 12/31/2028 376 The Bank is the owner and beneficiary of insurance policies on the lives of certain officers and directors, which informally fund the retirement plan obligation. The aggregate cash surrender value of these policies was $3,976,000 and $3,905,000 at December 31, 2018 and 2017, respectively. (a) Defined Benefit Pension Plan As a result of the acquisition of Scottdale on January 8, 2018, Mid Penn has assumed a noncontributory defined benefit pension plan covering certain former employees of Scottdale. Mid Penn’s policy is to fund pension benefits as accrued. The Plan’s assets are managed by the Trust Department of the Bank and were primarily invested in corporate equity securities at the time of acquisition, but have since been diversified into a more conservative investment profile, including fixed income debt securities. The investment objective of the plan is “Balanced” to provide relatively stable growth from assets offset by a moderate level of income with target portfolio allocations of up to 20% cash, 30-50% fixed income securities, and 40-60% equity securities. The valuation of the plan’s assets are subject to market fluctuations. For the year ended December 31, 2018, Mid Penn recognized $737,000 of settlement gains as a result of certain lump sum payouts to participants of the defined benefit pension plan. The settlement gains were recorded in noninterest income as a component of other income for the year ended December 31, 2018. The following tables provide a reconciliation of the changes in the defined benefit pension plan’s benefit obligations and fair value of plan assets for the year ended December 31, 2018, and a statement of the status at December 31, 2018. (Dollars in thousands) December 31, Change in benefit obligations: 2018 Benefit obligations, January 1 $ 10,542 Service cost 287 Interest cost 392 Settlement loss 118 Actuarial gain (2,271 ) Settlement payments (3,828 ) Benefit payments (77 ) Benefit obligations, December 31 $ 5,163 Change in fair value of plan assets: Fair value of plan assets, January 1 $ 8,121 Return on plan assets $ 57 Employer contributions 600 Benefit payments (77 ) Administrative expenses (55 ) Settlement payments (3,828 ) Fair value of plan assets, December 31 $ 4,818 Funded status at year end $ (345 ) Amounts recognized in other liabilities on the consolidated balance sheet at December 31, 2018 and 2017 are as follows: (Dollars in thousands) 2018 Accrued benefit liability $ 345 Amounts recognized in accumulated other comprehensive loss consist of: (Dollars in thousands) December 31, 2018 Unrecognized actuarial gain $ 994 The accumulated benefit obligation for the retirement plan was $5,163,000 at December 31, 2018. The components of net periodic retirement cost for 2018 are as follows: (Dollars in thousands) 2018 Service cost $ 287 Interest cost 392 Expected return on plan assets (423 ) Net periodic retirement cost $ 256 Assumptions used in the measurement of Mid Penn’s benefit obligations at December 31, 2018 are as follows: Weighted-average assumptions: 2018 Discount rate 4.25 % Expected long-term return on plan assets 5.00 % Rate of compensation increases 3.00 % Assumptions used in the measurement of Mid Penn’s net periodic benefit cost for the years ended December 31, 2018 are as follows: Weighted-average assumptions: 2018 Discount rate 4.25 % Expected long-term return on plan assets 5.00 % Rate of compensation increases 3.00 % The plan’s weighted-average asset allocations by investment category as of December 31, 2018 are as follows: Weighted-average asset allocations: 2018 Cash and cash equivalents 50.44 % Common stock 38.14 % Corporate bonds 11.42 % 100.00 % The following table sets forth by level, within the fair value hierarchy, the plan’s assets at fair value as of December 31, 2018. Fair Value Measurements (Dollars in thousands) Quoted prices in active markets Significant other observable inputs Significant unobservable inputs December 31, 2018 (Level 1) (Level 2) (Level 3) Cash and cash equivalents $ 2,430 $ — $ — Common stock: Mining 36 — — Manufacturing 888 — — Transportation, Communications, Electric, Gas, and Sanitary Services 468 — — Finance, Insurance, and Real Estate 248 — — Services 189 — — Other 9 — — Corporate bonds — 550 — $ 4,268 $ 550 $ — A description of the valuation methodologies used for assets measured at fair value is disclosed below. Common Stocks Valued at the closing price reported on the active market on which the individual securities are traded. Corporate Bonds Valued using matrix pricing, 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. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Mid Penn expects to contribute $600,000 to the defined benefit pension plan in 2019. The following table shows the estimated benefit payments for future periods. (Dollars in thousands) 1/1/2019 to 12/31/2019 $ 92 1/1/2020 to 12/31/2020 115 1/1/2021 to 12/31/2021 144 1/1/2022 to 12/31/2022 160 1/1/2023 to 12/31/2024 162 1/1/2024 to 12/31/2028 1,714

Other Benefit Plans

Other Benefit Plans	12 Months Ended
	Dec. 31, 2018
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Other Benefit Plans	(1 7 ) Other Benefit Plans Mid Penn maintains several benefit plans for both current and former employees of the Bank. Liabilities related to the plans are recorded in other liabilities on the balance sheet, and aggregate cash surrender values assets related to the life insurance plans are recorded in the cash surrender value of life insurance line item on the balance sheet. Significant aspects of the plans are detailed below. (a) 401(k) Plan The Bank has a 401(k) plan that covers substantially all full-time employees. The plan allows employees to contribute a portion of their salaries and wages to the plan and provides for the Bank to match a portion of employee-elected salary deferrals, subject to certain percentage maximums of their salaries and wages. The Bank’s contribution to the 401(k) Plan was $514,000, $383,000, and $362,000 for the years ending December 31, 2018, 2017, and 2016, respectively. During 2018, Mid Penn assumed the 401(k) plans of Scottdale and First Priority and, as of December 31, 2018, these 401(k) plans were managed by Mid Penn’s Human Resources and Trust areas. These 401(k) plans were frozen and no contributions were made to the plans in 2018. The plans are being evaluated for either termination or merger into Mid Penn’s primary 401(k) plan. (b) Defined-Contribution Plan The Bank has a funded contributory defined-contribution plan covering substantially all employees. The Bank did not contribute to the plan in 2018, 2017, or 2016. (c) Deferred Compensation Plans The Bank has an executive deferred compensation plan, which allows executive officers to defer compensation for a specified period in order to provide future retirement income. The only participant in the plan is a former executive officer. The Bank accrued a liability for the plan of approximately $106,000 at December 31, 2018 and $125,000 at December 31, 2017. The expense related to the plan was $78,000 in 2018, $5,000 in 2017, and $6,000 in 2016. The Bank also has a directors’ deferred compensation plan, which allows directors to defer receipt of director fees for a specified period in order to provide future retirement income. At December 31, 2018 and 2017, the Bank accrued a liability of $838,000 and $683,000, respectively, for this plan. The expense related to the plan was $31,000 in 2018, $25,000 in 2017, and $21,000 in 2016. (d) Salary Continuation Agreement The Bank maintains a Salary Continuation Agreement (“Agreement”) for a former executive officer. The Agreement provides the former executive officer with a fixed annual benefit. The benefit is payable beginning at age 65 for a period of 15 years. At December 31, 2018 and 2017, the Bank accrued a liability of approximately $236,000 and $246,000, respectively, for the Agreement. The expense related to the Agreement was $17,000 for 2018, $17,000 for 2017, and $17,000 for 2016. The Bank is the owner and beneficiary of an insurance policy on the life of the participating former executive officer, which supports the funding of the benefit obligation. The aggregate cash surrender value of this policy was approximately $1,352,000 and $1,317,000 at December 31, 2018 and 2017, respectively. (e) Split Dollar Life Insurance Arrangements At December 31, 2018 and 2017, the Bank had Split Dollar Life Insurance arrangements with two former executives for which the aggregate collateral assignment and cash surrender values are approximately $1,387,000 and $1,375,000, respectively. Mid Penn acquired Phoenix’s Split Dollar Life Insurance arrangements in 2015 on select employees, which had aggregate cash surrender values of $4,010,000 at December 31, 2018 and $3,924,000 at December 31, 2017. (f) Employee Stock Purchase Plan Mid Penn has an Employee Stock Purchase Plan (“ESPP”) in which all employees are eligible to participate. The plan allows employees to use a portion of their salaries and wages to purchase shares of Mid Penn common stock at the market value of shares at the end of each calendar quarter. 2018 2017 2016 ESPP shares purchased 4,132 3,578 4,465 Average purchase price per share $ 28.716 $ 29.027 $ 18.520 (g) Director Stock Purchase Plan On May 24, 2017, the Board of Directors of Mid Penn approved the Director Stock Purchase Plan (“DSPP”). The purpose of the DSPP is to provide non-employee directors of Mid Penn with a convenient means to purchase Corporation common stock at fair market value on the last day of each calendar quarter. The plan was effective beginning July 1, 2017. Participants purchased 4,296 shares at an average purchase price per share of $28.94 during the year ended December 31, 2018. Participants purchased 1,345 shares at an average purchase price per share of $31.136 during the year ended December 31, 2017. (h) Supplemental Executive Retirement Plan On August 31, 2018, Mid Penn entered into supplemental executive retirement plan agreements (“SERPs”) with four named executive officers. Each SERP provides for the monthly payment of a fixed cash benefit over a period of fifteen (15) years, commencing on the first day of the month following the Executive’s separation from service: (i) occurring on or after reaching normal retirement age (age 70); (ii) due to disability; (iii) due to death; or (iv) within two (2) years following a change in control of the Bank. One-half of the benefit vests on January 1, 2022, with an additional 10% vesting each January 1 thereafter until fully vested on January 1, 2027. Any unvested portion of the benefit fully vests upon a change in control of the Bank. The accrued liability for the supplemental retirement plans was $73,000 as of December 31, 2018.

Federal Income Taxes

Federal Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal Income Taxes	(1 8 ) Federal Income Taxes The following temporary differences gave rise to the net deferred tax asset at December 31, 2018 and 2017. (Dollars in thousands) 2018 2017 Deferred tax assets: Allowance for loan and lease losses $ 1,763 $ 1,597 Loan fees 136 105 Deferred compensation 508 221 Benefit plans 134 320 Unrealized loss on securities 862 574 Sale/leaseback adjustment 66 72 Business combination adjustments 1,692 358 Acquired NOL and charitable contribution carryforwards 1,391 — Acquired AMT carryforward 1,433 — Other 128 108 8,113 3,355 Deferred tax liabilities: Depreciation (1,073 ) (619 ) Bond accretion (29 ) (9 ) Goodwill and intangibles (348 ) (329 ) Prepaid expenses (515 ) (333 ) Business combination adjustments (948 ) (176 ) Benefit plans (459 ) — Other (45 ) (1 ) (3,417 ) (1,467 ) Deferred tax asset, net $ 4,696 $ 1,888 As reflected Notes 4 and 5, a substantial portion of the net deferred tax asset increase year-over-year relates to the deferred tax assets generated by or acquired from the mergers of Scottdale and First Priority. At December 31, 2018, the Company had no valuation allowance established against its NOL and charitable contribution carryforwards, as management believes the Corporation will generate sufficient future taxable income to fully utilize these deferred tax assets. The charitable contribution carryforwards will expire between 2019 and 2021. The Tax Cuts and Jobs Act enacted on December 22, 2017 repealed Corporate Alternative Minimum Tax (AMT). As a result, AMT carryforwards as of December 31, 2018 will be systematically refunded with each return until fully refunded no later than the filing of the Corporation’s December 31, 2021 tax return. At December 31, 2018, Mid Penn had net operating loss carryforwards of $5,465,000 which are all due to acquisitions that occurred in 2018 and are available to offset future taxable income. The NOL carryforwards do not expire, however, Mid Penn is limited to a deduction of the lesser of the available NOL carryforward or 80 percent of pre-NOL deductible taxable income in a single tax year as set forth in the Tax Cuts and Jobs Act. Due to the fact that these NOLs were acquired, there are Section 382 limitations that establish the amount allowable to be used to offset taxable income in the amount of $1,854,000 per year. In assessing the realizability of federal or state deferred tax assets, management considers whether it is more likely than not some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and prudent, feasible and permissible as well as available tax planning strategies in making this assessment. Based on the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that Mid Penn will realize the benefits of these deferred tax assets. On December 22, 2017, the TCJA was signed into law, reducing the federal tax rate to 21% beginning on January 1, 2018. The revaluation of net deferred tax assets as of December 22, 2017 resulted in $1,169,000 of additional tax expense on the date of enactment included in deferred expense in the tables below. The provision for income taxes consists of the following: (Dollars in thousands) 2018 2017 2016 Current expense $ 812 $ 2,672 $ 2,613 Deferred expense (benefit) 1,317 1,828 (336 ) Total provision for income taxes $ 2,129 $ 4,500 $ 2,277 A reconciliation of income tax at the statutory rate of 21% for 2018 and 34% for 2017 and 2016 to Mid Penn's effective rate is as follows: (Dollars in thousands) 2018 2017 2016 Provision at the expected statutory rate $ 2,672 $ 3,940 $ 3,428 Effect of tax-exempt income (704 ) (668 ) (1,089 ) Effect of investment in life insurance (60 ) (89 ) (90 ) Nondeductible interest 40 30 41 Nondeductible merger and acquisition expense 193 191 — Rate change adjustment — 1,169 — Other items (12 ) (73 ) (13 ) Provision for income taxes $ 2,129 $ 4,500 $ 2,277 Mid Penn has no unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in future periods. Mid Penn does not expect the total amount of unrecognized tax benefits to significantly increase or decrease in the next twelve months. No amounts for interest and penalties were recorded in income tax expense in the consolidated statement of income for the years ended December 31, 2018, 2017, or 2016. There were no amounts accrued for interest and penalties at December 31, 2018 or 2017. Mid Penn and its subsidiaries are subject to U.S. federal income tax and income tax for the state of Pennsylvania. With limited exceptions, Mid Penn is no longer subject to examination by taxing authorities for years before 2015.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Matters	(1 9 ) Regulatory Matters Mid Penn Bancorp, Inc., is a bank holding company and, as such, chooses to maintain a well-capitalized status in its bank subsidiary. Quantitative measures established by regulation to ensure capital adequacy require Mid Penn to maintain minimum amounts and ratios (set forth below) of Tier 1 Capital to average assets and of Total Capital (as defined in the regulations) to risk-weighted assets. As of December 31, 2018 and December 31, 2017, Mid Penn met all capital adequacy requirements to which the Bank is subject, and the Bank is considered “well-capitalized”. However, future changes in regulations could increase capital requirements and may have an adverse effect on capital resources. The federal banking agencies have substantially amended the regulatory risk-based capital rules applicable to Mid Penn. The amendments implemented the Basel III regulatory capital reforms and changes required by the Dodd-Frank Act. The amended rules included new minimum risk-based capital and leverage ratios, which became effective in January 2015, with certain requirements to be phased in beginning in 2016, and refined the definition of what constitutes "capital" for purposes of calculating those ratios. The new minimum capital level requirements applicable to Mid Penn include: (i) a new common equity Tier I capital ratio of 4.5%; (ii) a Tier I capital ratio of 6.0% (increased from 4.0 %); (iii) a Total Capital ratio of 8.0% (unchanged from current rules); and (iv) a Tier I leverage ratio of 4.0% for all institutions. The amended rules also establish a "capital conservation buffer" of 2.5% above the new regulatory minimum capital ratios, which result in the following minimum ratios: (i) a common equity Tier I capital ratio of 7.0%; (ii) a Tier I capital ratio of 8.5%; and (iii) a Total Capital ratio of 10.5%. The new capital conservation buffer requirement was phased in beginning in January 2016 at 0.625% of risk-weighted assets and increased each year until fully implemented in January 2019. An institution will be subject to limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses if its capital level falls below the buffer amount. These limitations will establish a maximum percentage of eligible retained income that could be utilized for such actions. Certain restrictions exist regarding the ability of the Bank to transfer funds to the Corporation in the form of cash dividends, loans, or advances. The amount of dividends that may be paid in any calendar year is limited to the current year’s net profits, combined with the retained net profits of the preceding two years. At December 31, 2018, $4,207,000 of undistributed earnings of the Bank included in the consolidated shareholders’ equity was available for distribution to the Corporation as dividends without prior regulatory approval, subject to regulatory capital requirements below. Mid Penn maintained the following regulatory capital levels, leverage ratios, and risk-based capital ratios as of December 31, 2018, and December 31, 2017: (Dollars in thousands) Capital Adequacy To Well-Capitalized Under Prompt Minimum Capital Corrective Actual Required (1) Action Provisions Amount Ratio Amount Ratio Amount Ratio Corporation As of December 31, 2018 Tier 1 Capital (to Average Assets) $ 155,662 8.0 % $ 77,499 4.000 % $ N/A N/A Common Equity Tier 1 Capital (to Risk Weighted Assets) 155,662 10.0 % 98,977 6.375 % N/A N/A Tier 1 Capital (to Risk Weighted Assets) 155,662 10.0 % 122,265 7.875 % N/A N/A Total Capital (to Risk Weighted Assets) 191,300 12.3 % 153,317 9.875 % N/A N/A Bank As of December 31, 2018 Tier 1 Capital (to Average Assets) $ 171,776 8.9 % $ 77,230 4.000 % $ 96,537 5.0 % Common Equity Tier 1 Capital (to Risk Weighted Assets) 171,776 11.1 % 98,963 6.375 % 100,903 6.5 % Tier 1 Capital (to Risk Weighted Assets) 171,776 11.1 % 122,248 7.875 % 124,189 8.0 % Total Capital (to Risk Weighted Assets) 180,332 11.6 % 153,295 9.875 % 155,236 10.0 % Corporation As of December 31, 2017 Tier 1 Capital (to Average Assets) $ 74,417 6.5 % $ 45,857 4.000 % $ N/A N/A Common Equity Tier 1 Capital (to Risk Weighted Assets) 74,417 8.4 % 50,661 5.750 % N/A N/A Tier 1 Capital (to Risk Weighted Assets) 74,417 8.4 % 63,877 7.250 % N/A N/A Total Capital (to Risk Weighted Assets) 99,466 11.3 % 81,498 9.250 % N/A N/A Bank As of December 31, 2017 Tier 1 Capital (to Average Assets) $ 88,294 7.7 % $ 45,846 4.000 % $ 57,308 5.0 % Common Equity Tier 1 Capital (to Risk Weighted Assets) 88,294 10.0 % 50,661 5.750 % 57,269 6.5 % Tier 1 Capital (to Risk Weighted Assets) 88,294 10.0 % 63,877 7.250 % 70,485 8.0 % Total Capital (to Risk Weighted Assets) 96,005 10.9 % 81,498 9.250 % 88,106 10.0 % (1) The minimum amounts and ratios as of December 31, 2018 include the third year phase in of the capital conservation buffer of 1.875% required by the Basel III framework. As of December 31, 2017, minimum amounts and ratios include the second year phase in of the capital conservation buffer of 1.25% required by the Basel III framework.

Concentration of Risk and Off-B

Concentration of Risk and Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2018
Concentration Risks Types No Concentration Percentage [Abstract]
Concentration Risk and Off-Balance Sheet Risk	(20 ) Concentration of Risk and Off-Balance Sheet Risk The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The Bank evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on management's credit evaluation of the borrower. Collateral held varies but may include accounts receivable, inventory, property, plant, and equipment, and income-producing commercial properties. The Bank's exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit written is represented by the contractual amount of those instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for direct, funded loans. 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. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The term of these standby letters of credit is generally one year or less. The amount of the liability as of December 31, 2018 and 2017 for guarantees under letters of credit issued is not considered material. As of December 31, 2018, commitments to extend credit amounted to $346,238,000 and standby letters of credit amounted to $20,839,000. As of December 31, 2017, commitments to extend credit amounted to $199,240,000 and standby letters of credit amounted to $20,496,000. Additionally, Mid Penn has sold loans to the FHLB as part of its Mortgage Partnership Finance Program (“Program). Under the terms of the Program, there is limited recourse back to Mid Penn for loans that do not perform in accordance with the terms of the loan agreement. Each loan that is sold under the Program is “credit enhanced” such that the individual loan’s rating is raised to “BBB”, as determined by the FHLB. The Program can be terminated by either the FHLB or Mid Penn, without cause, by giving notice to the other party. The FHLB has no obligation to commit to purchase any mortgage through, or from, Mid Penn. The total balance of loans sold under the Program was $5,836,000 and $7,314,000 for the years ended December 31, 2018 and 2017. Significant concentration of credit risk may occur when obligations of parties engaged in similar activities occur and accumulate in significant amounts. In analyzing the Bank's exposure to significant concentration of credit risk, management set a parameter of 10% or more of the Bank's total net loans outstanding as the threshold in determining whether the obligations of the same or affiliated parties would be classified as significant concentration of credit risk. Concentrations by industry, product line, type of collateral, etc., are also considered. U.S. Treasury securities, obligations of U.S. government agencies and corporations, and any assets collateralized by the same were excluded. As of December 31, 2018, commercial real estate financing was the only similar activity that met the requirements to be classified as a significant concentration of credit risk. However, there is a geographical concentration in that most of the Bank's business activity is with customers located in twelve counties in Pennsylvania. The Bank's highest industry concentration within the loan portfolio is in commercial real estate financing, which was 61.8 % and 51.1%, as of December 31, 2018 and 2017, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(2 1 ) Commitments and Contingencies Commitments During the second quarter of 2018, Mid Penn entered into a commitment to purchase a limited partnership interest in a low-income housing project to construct thirty-seven apartments and common amenities in Dauphin County, Pennsylvania. All of the units are intended to qualify 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, which will be 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 will be reported in other assets on the Consolidated Balance Sheet and amortized using the straight-line method over a ten year period. The project has been conditionally awarded $861,000 in annual LIHTCs by the Pennsylvania Housing Finance Agency, with a total anticipated LIHTC amount of $8,613,000 to be awarded to Mid Penn over the ten year amortization period. Mid Penn’s commitment to initiate investments in the limited partnership interest was conditional upon (i) the review and approval of all closing documents, (ii) an opinion letter for tax counsel to the Partnership that the project qualifies for the LIHTCs, and (iii) review and approval by Mid Penn of other documents it deemed necessary. All such initial conditions were satisfied and Mid Penn began funding the investment during 2018. As of December 31, 2018, the total investment in the limited partnership was $1,710,000 and was reported in other assets on the Consolidated Balance Sheet. Contingencies In a letter dated January 24, 2019, notification was received from the FDIC indicating that Mid Penn was eligible for small bank assessment credits. In general, banks that did not pay surcharges during the credit calculation period, defined as the third quarter of 2016 through the third quarter of 2018, are eligible for small bank assessment credits. Small banks with total consolidated assets of less than $10 billion were awarded assessment credits for the portion of their assessments that contributed to the growth in the reserve ratio from 1.15 percent to 1.35 percent. Each individual bank’s credit share is calculated as the product of the apportioned share of credits to an individual eligible institution multiplied by the total aggregate credits, and the FDIC’s preliminary estimate of Mid Penn’s total assessment credit is $492,000. The small bank assessment credits are contingent on the reserve ratio reaching at least 1.38 percent, which had not occurred as of December 31, 2018. The credit can only be applied against future assessments, is not refundable in cash, and cannot be sold. 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.

Common Stock

Common Stock	12 Months Ended
	Dec. 31, 2018
Common Stock Number Of Shares Par Value And Other Disclosures [Abstract]
Common Stock	(2 2 ) Common Stock Dividend Reinvestment Plan Under Mid Penn’s amended and restated dividend reinvestment plan (“DRIP”), 330,750 shares of Mid Penn’s authorized but unissued common stock are reserved for issuance. The DRIP also allows for voluntary cash payments, within specified limits, to be used for the purchase of additional shares. Restricted Stock Plan On June 25, 2014, the 2014 Restricted Stock Plan was registered under which awards shall not exceed, in the aggregate, 100,000 shares of common stock. The Plan was established for employees and directors of Mid Penn and the Bank, selected by the Compensation Committee of the Board of Directors, to advance the best interest of Mid Penn and its shareholders. The plan provides those persons who have a responsibility for its growth with additional incentives by allowing them to acquire an ownership interest in Mid Penn and thereby encouraging them to contribute to the success of the company. As of December 31, 2018, 36,859 shares have been granted under the Plan. During 2018, Mid Penn granted 12,250 restricted shares, 7,450 of which were granted to employees, while 4,800 were granted to directors. Mid Penn granted 10,440 restricted shares in 2017, 6,040 of which were granted to employees, while 4,400 were granted to directors. Throughout 2016, Mid Penn granted 7,450 restricted shares to employees. In 2018, 1,876 granted shares were forfeited to Mid Penn due to the termination of employment of three plan participants, while no shares were forfeited in 2017, and 470 shares were forfeited in 2016. 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. Restricted shares granted to employees vest in equal amounts on the anniversary of the grant date over a four year vesting period. Restricted shares granted to directors have a twelve month vesting period. The following table presents compensation expense and related tax benefits for restricted stock awards recognized on the consolidated statements of income. (Dollars in thousands) 2018 2017 2016 Compensation expense $ 267 $ 145 $ 53 Tax benefit (56 ) (49 ) (18 ) Net income effect $ 211 $ 96 $ 35 At December 31, 2017, there was $582,000 of unrecognized compensation cost related to all non-vested share-based compensation awards. This cost is expected to be recognized through July 2022 with a weighted average recognition period of 2.3 years. Mid Penn recognizes the impact of forfeitures as of the forfeiture date. The following table presents information regarding the non-vested restricted stock for the year ended December 31, 2018. Shares Weighted-Average Grant Date Fair Value Non-vested at January 1, 2018 19,499 $ 22.54 Vested (9,647 ) 22.85 Forfeited (1,876 ) 24.20 Granted 12,250 33.50 Non-vested at December 31, 2018 20,226 28.76

Preferred Stock

Preferred Stock	12 Months Ended
	Dec. 31, 2018
Class Of Stock Disclosures [Abstract]
Preferred Stock	(23 ) Preferred Stock In accordance with the terms and conditions of the Agreement and Plan of Merger dated January 16, 2018 between Mid Penn and First Priority (the “Merger Agreement”), each share of First Priority Fixed Rate Cumulative Perpetual Preferred Stock, Series C (the “First Priority Preferred Stock”) outstanding as of July 31, 2018 was converted into the right to receive one share of Mid Penn Fixed Rate Cumulative Perpetual Preferred Stock, Series D, having a $1,000 liquidation preference per share (the “Mid Penn Preferred Stock”). In connection with the Merger, Mid Penn issued 3,404 shares of Mid Penn Preferred Stock totaling $3,404,000. The terms of the Mid Penn Preferred Stock were no less favorable than those of the First Priority Preferred Stock as in effect immediately prior to the Merger. Under the terms of the Mid Penn Preferred Stock, no repurchases may be effected, and no dividends may be declared or paid on preferred shares ranking pari passu with the Mid Penn Preferred Stock, junior preferred shares, or other junior securities (including the common stock) unless all accrued and unpaid dividends on the Mid Penn Preferred Stock for all past dividend periods are paid in full. The Mid Penn Preferred Stock was redeemable at the option of Mid Penn, subject to the prior receipt of any requisite regulatory approval. Dividends were payable quarterly on February 15, May 15, August 15 and November 15 of each year. The dividend rate on the Mid Penn Preferred Stock was fixed at 9%. During the fourth quarter of 2018, the Federal Reserve Bank approved Mid Penn’s request to redeem all 3,404 shares of the Mid Penn Preferred Stock at the $1,000 liquidation value. The redemption of the $3,404,000 of the Mid Penn Preferred Stock was completed and final dividend payment made on December 14, 2018.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenue Recognition	(2 4 ) Revenue Recognition 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 Activities Income from fiduciary activities consist of investment management fee income, brokerage transaction fee income, and estate fee income. Investment management fee income consists of advisory fees that are 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 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 interchange activity is received primarily daily, while some fees are aggregated and payment is received in the following month. Merchant Services Income Merchant services income is processed through a third party provider 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 third party 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.

Parent Company Statements

Parent Company Statements	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Parent Company Statements	(25 ) Parent Company Statements CONDENSED BALANCE SHEETS (Dollars in thousands) December 31, 2018 2017 ASSETS Cash and cash equivalents $ 1,572 $ 4,686 Investment in subsidiaries 239,323 89,581 Other assets 296 — Total assets $ 241,191 $ 94,267 LIABILITIES AND SHAREHOLDERS' EQUITY Subordinated debt $ 17,694 $ 17,338 Other liabilities 288 1,226 Shareholders' equity 223,209 75,703 Total liabilities and shareholders' equity $ 241,191 $ 94,267 CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Dollars in thousands) For Years Ended December 31, 2018 2017 2016 Income Dividends from subsidiaries $ 10,837 $ 9,657 $ 2,871 Other income — 19 33 Total Income 10,837 9,676 2,904 Expense Other expenses (5,668 ) (1,899 ) (606 ) Total Expense (5,668 ) (1,899 ) (606 ) Income before income tax and equity in undistributed earnings (loss) of subsidiary 5,169 7,777 2,298 Equity in undistributed earnings (loss) of subsidiary 4,207 (1,136 ) 5,311 Income before income tax 9,376 6,641 7,609 Income tax benefit 1,220 448 195 Net income 10,596 7,089 7,804 Series D preferred stock dividends 102 — — Net income available to common shareholders $ 10,494 $ 7,089 $ 7,804 Comprehensive income $ 10,257 $ 8,209 $ 3,139 CONDENSED STATEMENTS OF CASH FLOWS (Dollars in thousands) For Years Ended December 31, 2018 2017 2016 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 10,596 $ 7,089 $ 7,804 Equity in undistributed loss (earnings) of subsidiaries (4,207 ) 1,136 (5,311 ) Decrease (increase) in other assets (49 ) 240 59 Increase (decrease) in other liabilities 1,120 626 457 Net cash provided by operating activities 7,460 9,091 3,009 CASH FLOWS FROM INVESTING ACTIVITIES Net cash paid for acquisitions (2,798 ) — — Proceeds from the sale of investment securities — 618 — Repayment from (investment in) subsidiary — (12,600 ) — Net cash used in investing activities (2,798 ) (11,982 ) — CASH FLOWS FROM FINANCING ACTIVITIES Dividends paid (4,513 ) (3,264 ) (2,875 ) Series D preferred stock dividends (102 ) — — Series D preferred stock redemption (3,404 ) — — Employee Stock Purchase Plan 119 104 82 Director Stock Purchase Plan 124 42 — Deferred financing fees paid for subordinated debt issuance — (85 ) — Subordinated debt issuance — 10,000 — Net cash provided by (used in) financing activities (7,776 ) 6,797 (2,793 ) Net increase in cash and cash equivalents (3,114 ) 3,906 216 Cash and cash equivalents, beginning of year 4,686 780 564 Cash and cash equivalents, end of year $ 1,572 $ 4,686 $ 780

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2018
New Accounting Pronouncement Or Change In Accounting Principle Retrospective Adjustments [Abstract]
Recent Accounting Pronouncements	(2 6 ) Recent Accounting Pronouncements ASU 2017-07 : The FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The ASU requires that an employer disaggregate the service cost component from the other components of net benefit cost. Service cost must be presented in the same line item(s) as other employee compensation costs. These costs are generally included within income from continuing operations, but in some cases may be eligible for capitalization, if certain criteria are met. All other components of net benefit cost must be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. These generally include interest cost, actual return on plan assets, amortization of prior service cost included in accumulated other comprehensive income, and gains or losses from changes in the value of the projected benefit obligation or plan assets. If a separate line item is used to present the other components of net benefit cost, it must be appropriately described. If a separate line item is not used, an entity must disclose the line item(s) in the income statement that includes the other components of net benefit cost. The ASU clarifies that these costs are not eligible for capitalization. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those years. For other entities, the amendments are effective for annual periods beginning after December 15, 2018, and interim periods within annual periods beginning after December 15, 2019. Early adoption is permitted as of the beginning of an annual period. Mid Penn adopted this ASU in the first quarter of 2018. For the year ended December 31, 2018, service costs totaling $287,000 related to plans benefiting Mid Penn employees 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 settlement gain were reported as a component of other income and collectively totaled $768,000. Service costs, interest costs, and amortization of prior service costs related to plans benefiting Mid Penn’s nonemployee directors totaling $93,000 are reported as a component of director fees and benefits expense within the other expense line item on the Consolidated Statement of Income. The components of net benefit cost were impacted by the acquisition of a defined benefit plan from Scottdale in 2018. Net benefit costs in 2017 and 2016 were immaterial. The adoption of this standard did not impact Mid Penn’s results of operations. ASU 2017-05 : The FASB issued ASU 2017-05, Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets. The ASU was issued to clarify the scope of Subtopic 610-20 and to add guidance for partial sales of nonfinancial assets, including partial sales of real estate. Historically, U.S. GAAP contained several different accounting models to evaluate whether the transfer of certain assets qualified for sale treatment. Moving forward, the new standard reduces the number of potential accounting models that might apply and clarifies which model does apply in various circumstances. Specifically, it clarifies the scope of Subtopic 610-20 by defining the term “in substance nonfinancial asset”. If substantially all of the fair value of the assets (recognized and unrecognized) promised to a counterparty in a contract is concentrated in nonfinancial assets, a financial asset in the same arrangement would still be considered part of an in substance nonfinancial asset. Also, nonfinancial assets may include nonfinancial assets contained within a legal entity that is transferred to a counterparty (e.g., through transfer of ownership interest). It clarifies also that derecognition of a business is not within the scope of Subtopic 610-20, but rather, is governed by Topic 810. In addition, the ASU indicates an entity should identify each distinct nonfinancial asset (e.g., real estate and inventory) or in substance nonfinancial asset promised to a counterparty and derecognize each asset when a counterparty obtains control of it. Finally, the ASU adds guidance on accounting for partial sales of nonfinancial assets. It requires an entity to derecognize a distinct nonfinancial asset or distinct in substance nonfinancial asset in a partial sale transaction when two criteria are met: 1) the entity does not have (or ceases to have) a controlling financial interest in the legal entity that holds the asset in accordance with Topic 810, and 2) the entity transfers control of the asset in accordance with Topic 606. The effective date and transition requirements for the ASU are the same as the effective date and transition requirements of Topic 606, and must be applied at the same date that Topic 606 is initially applied. That is, the amendments are effective for public entities for annual reporting periods beginning after December 15, 2017, including interim periods within those periods, and for nonpublic entities for annual reporting periods beginning after December 15, 2018, and interim periods within annual reporting periods beginning after December 15, 2019. Consistent with Topic 606, early adoption is permitted but no earlier than annual reporting periods beginning after December 15, 2016 for all entities. Mid Penn adopted this ASU in the first quarter of 2018. The adoption did not have a material impact on its consolidated financial statements as Mid Penn typically does not engage in partial sale transactions. ASU 2016-15 : The FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. The ASU clarifies how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments are intended to reduce diversity in practice. • Cash payments for debt prepayment or extinguishment costs will be classified in financing activities. • Upon settlement of zero-coupon bonds and bonds with insignificant cash coupons, the portion of the payment attributable to imputed interest will be classified as an operating activity, while the portion of the payment attributable to principal will be classified as a financing activity. • Cash paid by an acquirer that isn’t soon after a business combination for the settlement of a contingent consideration liability will be separated between financing activities and operating activities. Cash payments up to the amount of the contingent consideration liability recognized at the acquisition date will be classified in financing activities; any excess will be classified in operating activities. Cash paid soon after the business combination will be classified in investing activities. • Cash proceeds received from the settlement of insurance claims will be classified on the basis of the related insurance coverage (that is, the nature of the loss). Cash proceeds from lump-sum settlements will be classified based on the nature of each loss included in the settlement. • Cash proceeds received from the settlement of corporate-owned life insurance (“COLI”) and BOLI policies will be classified as cash inflows from investing activities. Cash payments for premiums on COLI and BOLI may be classified as cash outflows for investing, operating, or a combination of both. • A transferor’s beneficial interest obtained in a securitization of financial assets will be disclosed as a noncash activity, and cash received from beneficial interests will be classified in investing activities. • Distributions received from equity method investees will be classified using either a cumulative earnings approach or a look- through approach as an accounting policy election. The ASU contains additional guidance clarifying when an entity should separate cash receipts and cash payments and classify them into more than one class of cash flows (including when reasonable judgment is required to estimate and allocate cash flows) versus when an entity should classify the aggregate amount into one class of cash flows on the basis of predominance. The amendments are effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. For all other entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2018, and interim periods within fiscal years beginning after December 15, 2019. Early adoption is permitted. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. An entity that elects early adoption must adopt all of the amendments in the same period. Mid Penn adopted the amendments in the first quarter of 2018. As a result of the adoption of this standard, there were no changes required to cash flow presentation and no impact on Mid Penn’s operating results. Mid Penn will continue to monitor for transactions that may be impacted by this standard, particularly related to cash payments for debt prepayment costs and cash proceeds received from the settlement of BOLI policies as these areas might affect Mid Penn in the future. ASU 2016-13 : The FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. 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. The Update has tiered effective dates, with early adoption permitted for all entities as of the fiscal year beginning after December 15, 2018. For public business entities that are SEC filers, the amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. 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 has selected a software vendor to support both the implementation of ASU 2016-13 and the ongoing compliance requirements. We have provided our core data to the vendor and completed an assessment of the information to see what, if any, additional data elements may be need to be collected to perform the calculation. After all required data elements are collected and loaded into the software, Mid Penn plans to run one quarter of reports based on our current methodology to validate the data flow, and intends to run two quarters under the CECL methodology prior to the implementation of the standard on January 1, 2020. ASU 2016-02: The FASB issued ASU 2016-02, Leases. The new leases standard applies a right-of-use (“ROU”) model that requires a lessee to record, for all leases with a lease term of more than 12 months, an asset representing its right to use the underlying asset and a liability to make lease payments. For leases with a term of 12 months or less, a practical expedient is available whereby a lessee may elect, by class of underlying asset, not to recognize an ROU asset or lease liability. At inception, lessees must classify all leases as either finance or operating based on five criteria. Balance sheet recognition of finance and operating leases is similar, but the pattern of expense recognition in the income statement, as well as the effect on the statement of cash flows, differs depending on the lease classification. The new leases standard requires a lessor to classify leases as either sales-type, direct financing or operating, similar to existing U.S. GAAP. Classification depends on the same five criteria used by lessees plus certain additional factors. The subsequent accounting treatment for all three lease types is substantially equivalent to existing U.S. GAAP for sales-type leases, direct financing leases, and operating leases. However, the new standard updates certain aspects of the lessor accounting model to align it with the new lessee accounting model, as well as with the new revenue standard under Topic 606. Lessees and lessors are required to provide certain qualitative and quantitative disclosures to enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The new leases standard addresses other considerations including identification of a lease, separating lease and non-lease components of a contract, sale and leaseback transactions, modifications, combining contracts, reassessment of the lease term, and re-measurement of lease payments. It also contains comprehensive implementation guidance with practical examples. On July 30, 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, The amendments for both ASUs are effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Specific transition requirements apply. The amendments are effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. Specific transition requirements apply. Mid Penn adopted this standard in the first quarter of 2019 using the option to apply the transition provisions of the new standard at the adoption date instead of the earliest period presented as provided in ASU 2018-11. Additionally, Mid Penn elected to apply all practical expedients as provided in ASU 2016-02, with the exception of the hindsight practical expedient which was not elected. As a result of the adoption of this standard, effective January 1, 2019, Mid Penn recognized (i) a ROU asset of $11,661,000 to be recorded in other assets on the balance sheet, (ii) a lease liability of $12,866,000 to be recorded in other liabilities on the balance sheet, and (iii) an opening adjustment to retaining earnings of $316,000 to eliminate the remaining balance of the deferred sale/leaseback gain on two retail branch locations which had originally been recorded in 2016. The lease liability represents the present value of future payments on twenty-four leased properties within the Mid Penn footprint as of the January 1, 2019 adoption date, while the ROU asset reflects the lease liability, adjusted for deferred/accrued rent balances and the balance of acquisition accounting fair value adjustments of the respective properties as of the adoption date of January 1, 2019. The adoption of this standard is not expected to have a material impact on Mid Penn’s capital ratios or cause Mid Penn to no longer be well capitalized. ASU 2016-01: The FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities . This ASU requires equity investments to be measured at fair value with changes in fair value recognized in net income, excluding equity investments that are consolidated or accounted for under the equity method of accounting. The ASU allows equity investments without readily determinable fair values to be measured at cost minus impairment, with a qualitative assessment required to identify impairment. The ASU also requires public companies to use exit prices to measure the fair value of financial instruments, eliminates the disclosure requirements related to measurement assumptions for the fair value of instruments measured at amortized cost, and requires separate presentation of financial assets and liabilities based on form and measurement category. In addition, for liabilities measured at fair value under the fair value option, the changes in fair value due to changes in instrument-specific credit risk should be recognized in OCI. This ASU is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and was adopted by Mid Penn effective January 1, 2018. The adoption of this ASU resulted in the reclassification of equity securities to other assets (equity securities had previously been classified as available-for-sale investment securities). Also, related to this reclassification, a one-time cumulative-effect adjustment was recorded on January 1, 2018 that decreased retained earnings by $44,000, increased accumulated other comprehensive loss by $35,000, and decreased the deferred tax asset by $9,000. The impact on net income as a result of the adoption of this standard was immaterial for the year ended December 31, 2018. Additionally, the adoption of this ASU resulted in the refinement of our loan fair value calculation to comply with the exit price measurement requirement. The adoption of the exit price measurement requirement portion of this ASU did not have a material impact on Mid Penn’s fair value disclosures. In February 2018, the FASB issued ASU 2018-03, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, ASU 2014-09 : The FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The amendments in this Update establish a comprehensive revenue recognition standard for virtually all industries under U.S. GAAP, including those that previously followed industry-specific guidance such as the real estate, construction and software industries. The revenue standard’s core principle is built on the contract between a vendor and a customer for the provision of goods and services. It attempts to depict the exchange of rights and obligations between the parties in the pattern of revenue recognition based on the consideration to which the vendor is entitled. To accomplish this objective, the standard requires five basic steps: (i) identify the contract with the customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract, and (v) recognize revenue when (or as) the entity satisfies a performance obligation. In August 2015, the FASB issued ASU 2015-14, Revenue from contracts with Customers (Topic 606): Deferral of the Effective Date In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients In November 2017, the FASB issued ASU 2017-14, Income Statement – Reporting Comprehensive Income (Topic 220), Revenue Recognition (Topic 605), and Revenue from Contracts with Customers (Topic 606) – Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403. The ASU adds guidance to the existing Staff Bulletin No. 116 stating that SAB Topic 13 (Revenue Recognition) and SAB Topic 8 (Retail Companies) are no longer applicable once a registrant adopts Topic 606. ASU 2014-09, including transition requirements for all amendments, is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. Mid Penn adopted the standard effective January 1, 2018. Through our assessment, we identified certain non-interest income financial statement revenue streams that met the criteria of this Standard and worked through the five step assessment process for each revenue stream within the scope of the Standard. Mid Penn has concluded that the adoption of the Standard using the modified retrospective approach did not have a financial statement impact as the current financial statement line items within the scope of this Standard were in compliance with the new guidance. As a result of the adoption of this standard, additional qualitative disclosures related to revenue recognition can be found in Note 11, Revenue Recognition ASU 2018-07: The FASB issued ASU 2018-07, Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting The ASU makes certain changes to the accounting for nonemployee awards to align the accounting for share-based payment awards issued to employees and nonemployees. The changes require that the compensation expense associated with nonemployee equity awards with performance conditions be recognized when the achievement of the performance condition is probable, rather than upon achievement of the performance condition. Additionally, the new ASU requires that equity-classified share-based payment awards issued to nonemployees be measured on the grant date, versus the previous GAAP requirement to re-measure the awards through the performance completion date. The current requirement to reassess the classification (equity or liability) for the nonemployee awards upon vesting will be eliminated. The amendments are effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted, including interim periods. Mid Penn currently issues restricted stock awards to nonemployee directors through the 2014 Restricted Stock Plan (the “Plan”). The single performance condition of the award is that the individual remain a director of Mid Penn through the duration of the vesting period. Mid Penn is currently evaluating the details of this ASU and expects that the adoption of this ASU will not have a material impact on our consolidated financial statements as the compensation expense related to nonemployee equity awards is immaterial to Mid Penn’s overall financial condition. 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. The ASU is effective for all entities for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. 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 will be 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 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. 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.

Summary of Quarterly Consolidat

Summary of Quarterly Consolidated Financial Data	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Summary of Quarterly Consolidated Financial Data	(2 7 ) Summary of Quarterly Consolidated Financial Data (Unaudited) The following table presents summarized quarterly financial data for 2018 and 2017. Due to the methodology and rounding of quarterly earnings per share versus full-year earnings per share calculations, the quarterly measures may not equal to the full-year measurement disclosed on the respective year’s income statement. (Dollars in thousands, except per share data) 2018 Quarter Ended March 31 June 30 September 30 December 31 Interest Income $ 12,980 $ 13,720 $ 19,583 $ 22,371 Interest Expense 2,102 2,306 3,672 4,640 Net Interest Income 10,878 11,414 15,911 17,731 Provision for Loan and Lease Losses 125 — 100 275 Net Interest Income After Provision for Loan Losses 10,753 11,414 15,811 17,456 Noninterest Income 1,647 1,559 2,165 2,091 Noninterest Expense 11,183 9,742 15,264 13,982 Income Before Provision for Income Taxes 1,217 3,231 2,712 5,565 Provision for Income Taxes 213 452 548 916 Net Income 1,004 2,779 2,164 4,649 Series D Preferred Stock Dividends — — 38 64 Net Income Available to Common Shareholders $ 1,004 $ 2,779 $ 2,126 $ 4,585 Per Share Data: Basic Earnings Per Common Share $ 0.17 $ 0.45 $ 0.28 $ 0.54 Cash Dividends Declared 0.00 0.15 0.15 0.15 (Dollars in thousands, except per share data) 2017 Quarter Ended March 31 June 30 September 30 December 31 Interest Income $ 10,559 $ 10,879 $ 11,150 $ 11,304 Interest Expense 1,384 1,469 1,634 1,817 Net Interest Income 9,175 9,410 9,516 9,487 Provision for Loan and Lease Losses 125 100 - 100 Net Interest Income After Provision for Loan Losses 9,050 9,310 9,516 9,387 Noninterest Income 1,436 1,362 1,564 1,331 Noninterest Expense 7,802 7,558 7,960 8,047 Income Before Provision for Income Taxes 2,684 3,114 3,120 2,671 Provision for Income Taxes 690 769 871 2,170 Net Income Available to Common Shareholders $ 1,994 $ 2,345 $ 2,249 $ 501 Per Share Data: Basic Earnings Per Common Share $ 0.47 $ 0.55 $ 0.53 $ 0.12 Cash Dividends Declared 0.13 0.13 0.13 0.38

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Use of Estimates	(a) Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan and lease losses, the assessment of other-than-temporary impairment of investment securities, the valuation of the goodwill for impairment, and the valuation of assets acquired and liabilities assumed in business combinations.
Cash and Cash Equivalents	(b) Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash on hand, balances due from banks, and federal funds sold, all of which mature within ninety days.
Investment Securities	(c) Interest-bearing Time Deposits with Other Financial Institutions Interest-bearing time deposits with other financial institutions consist of certificates of deposits in other financial institutions with maturities within one year. (d) Investment Securities Available-for-sale securities include debt securities which are reported at fair value, with unrealized holding gains and losses excluded from earnings being reported, net of deferred income taxes, as a component of accumulated other comprehensive income (loss) within shareholders’ equity. Beginning January 1, 2018, upon adoption of ASU 2016-01, equity securities with readily determinable fair values are stated at fair value within other assets on the balance sheet, with realized and unrealized gains and losses reported in other expense on the income statement. For periods prior to January 1, 2018, equity securities were classified as available-for-sale and stated at fair value within investment securities available-for-sale on the balance sheet, with unrealized gains and losses reported as a separate component of accumulated other comprehensive loss, net of tax. During 2017, Mid Penn added a held-to-maturity pool to its overall investment portfolio of debt securities, which are reported at amortized cost. Unrealized holding gains and losses on held-to-maturity securities are excluded from earnings, and are not a component of accumulated other comprehensive income (loss) within shareholders’ equity. Premiums and discounts on debt securities are amortized as an adjustment to interest income using the interest method. Realized gains and losses on sales of investment securities are computed on the basis of specific identification of the cost of each security.
Loans Held for Sale	(e) Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are included in loans held for sale and are carried at fair value, as determined by outstanding commitments from investors. Gains and losses on sales of mortgage loans are included in the Consolidated Statements of Income in mortgage banking income.
Loans and Allowance for Loan and Lease Losses	(f) Loans and Allowance for Loan and Lease Losses 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. Residential loans held for sale are carried at fair value and are included in loans held for sale on the balance sheet. 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. These amounts are 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 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 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, generally is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Generally, loans are 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 six 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 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% 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 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 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% 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% 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, 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 all underwriting conditions of the secondary mortgage market, the Bank will evaluate the non-qualifying condition(s) 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 held in the Bank’s portfolio, the interest rate on the residential mortgage typically would be increased to compensate for the added portfolio risk. Consumer, including home equity 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 second mortgages on principal residences. The Bank will lend amounts, which, together with all prior liens, typically may be up to 85% 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. Allowance for Loan and Lease Losses The allowance for credit losses consists of the allowance for loan and lease losses and 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 allowance for loan and lease losses 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 for loan and lease losses, 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, earlier in the event of bankruptcy, or if there is an amount deemed uncollectible. Because all identified losses are immediately charged off, no portion of the allowance for loan and lease losses is restricted to any individual loan or groups of loans, and the entire allowance is available to absorb any and all loan losses. Mid Penn also estimates a reserve for unfunded lending commitments, which 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 loan commitments was $159,000 at December 31, 2018 and $105,000 at December 31, 2017. The allowance for credit losses is maintained at a level considered 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 (“DCF”), 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, and shifting industry or portfolio concentrations. 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 a narrative accompanying the allowance for loan loss calculation. 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 DCF 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. 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 rated as substandard nonaccrual or lower 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. In the event the loan is unsecured, the loan would have been charged-off at the recognition of impairment. Commercial real estate loans rated as 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. The process of charge-off for residential mortgage loans begins upon a loan becoming delinquent for 90 days and 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. Consumer loans (including home equity loans and other consumer loans) are recommended for charge-off after reaching delinquency of 90 days and the loan is not in the process of collection. 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. 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 valuations on all impaired loans collateralized by real estate as soon as practically possible of 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, and will update the allowance impact calculation upon receipt of the updated real estate 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 an estimate of fair 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’s practice of obtaining independent third party market valuations on the subject property as soon as practically possible of the credit being identified as impaired sometimes indicates that the loan to value ratio is sufficient to obviate the need for a specific allocation. 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 twelve months for revaluation by an independent third party. The unallocated component of the allowance for loan and lease losses allocation recognizes the inherent imprecision in our allowance for loan and lease loss methodology, or any alternative methodology, for estimating specific and general loan losses, including the unpredictable timing and amounts of charge-offs, the fact that historical loss averages do not necessarily correlate to unexpected changes to specific-credit or general portfolio cash flows and collateral values which could negatively impact unimpaired portfolio loss factors. Also, t he unallocated component covers several considerations that are not specifically measureable through either the specific and general components. For example, we believe that we could face credit risks and uncertainties, not 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. 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 six consecutive months after modification. Loans classified as troubled debt restructurings are designated as impaired. The allowance calculation methodology includes further 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 for loan and lease losses 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. Acquired Loans Loans that Mid Penn acquires in connection with business combinations are recorded at fair value with no carryover of the existing related allowance for loan losses. Fair value of the 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. On loans determined to purchase credit impaired, 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 the Accounting Standard Codification (“ASC”) 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality Loans acquired through business combinations that do 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 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.
Bank Premises and Equipment	(g) Bank Premises and Equipment Land is carried at cost. Buildings, furniture, fixtures, equipment, land improvements, and leasehold improvements are stated at cost less accumulated depreciation. Depreciation is computed by the straight-line method over the estimated useful lives of the assets. Building assets are depreciated using an estimated useful life of five to fifty years. Furniture, fixtures, and equipment are depreciated using an estimated useful life of three to ten years. Land improvements are depreciated over an estimated useful life of ten to twenty years. Leasehold improvements are depreciated using an estimated useful life that is the lesser of the remaining life of the lease or ten to fifteen years. Maintenance and normal repairs are charged to expense when incurred, while major additions and improvements are capitalized. Gains and losses on disposals are reflected in current operations. Bank premises and equipment designated as held for sale are carried at the lower of cost or market value.
Restricted Investments in Bank Stocks	(h) Restricted Investments in Bank Stocks Restricted investments in bank stocks represent required investments in the common stock of correspondent banks. As a member of the FHLB and Atlantic Community Bankers Bank (“ACBB”), the Bank is required to own restricted stock investments in these correspondent banks, which is carried at cost. The level of stock ownership in the FHLB is adjusted by the FHLB throughout the year based upon the level of outstanding borrowings of the Bank (in general, the higher the amount of borrowings, the higher the amount of FHLB stock ownership requirement). Total dividends received from the FHLB in 2018 and 2017 totaled $275,000 and $114,000, respectively.
Foreclosed Assets Held for Sale	(i) 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 cost to sell 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 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 December 31, 2018, Mid Penn had $844,000 of residential real estate held in other real estate owned. There was also $211,000 in loans for which formal foreclosure proceedings were in process at December 31, 2018. As of December 31, 2017, Mid Penn had $42,000 of residential real estate held in other real estate owned and $308,000 in loans for which formal foreclosure proceedings were in process.
Mortgage Servicing Rights	(j) Mortgage Servicing Rights Mortgage servicing rights are recognized as assets upon the sale of a mortgage loan. A portion of the cost of the loan is allocated to the servicing right based upon relative fair value. The fair value of servicing rights is based on the present value of estimated future cash flows of mortgages sold, stratified by rate and maturity date. Assumptions that are incorporated in the valuation of servicing rights include assumptions about prepayment speeds on mortgages and the cost to service loans. Servicing rights are reported in core deposit and other intangibles in the Consolidated Balance Sheets and are amortized over the estimated period of future servicing income to be received on the underlying mortgage loans. The carrying amount of mortgage servicing rights was $106,000 and $126,000 at December 31, 2018 and 2017, respectively. Amortization expense is reflected in the Consolidated Statements of Income in intangible amortization and was $20,000, $18,000, and $30,000 for the years 2018, 2017, and 2016, respectively. Servicing rights are evaluated for impairment based upon estimated fair value as compared to unamortized carrying value. No servicing right impairments were identified or recorded for the three year period ended December 31, 2018. The principal balance of loans serviced for others was $15,601,000 and $17,963,000 for December 31 2018 and 2017, respectively.
Investment in Limited Partnership	(k) Investment in Limited Partnership 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 $233,000 at December 31, 2018 and $277,000 at December 31, 2017, net of amortization, using the straight-line method and is reported in other assets on the Consolidated Balance Sheets. Mid Penn’s maximum exposure to loss is limited to the carrying value of its investment. Mid Penn received $76,000 in low-income housing tax credits for each of the tax years ended December 31, 2017 and 2016. During the second quarter of 2018, Mid Penn entered into a commitment to purchase a limited partnership interest in a low-income housing project to construct thirty-seven apartments and common amenities in Dauphin County, Pennsylvania. All of the units are intended to qualify 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, which will be 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 will be reported in other assets on the Consolidated Balance Sheet and amortized over a ten year period. The project has been conditionally awarded $861,000 in annual LIHTCs by the Pennsylvania Housing Finance Agency, with a total anticipated LIHTC amount of $8,613,000 to be awarded to Mid Penn over the ten year amortization period. Mid Penn’s commitment to initiate investments in the limited partnership interest was conditional upon (i) the review and approval of all closing documents, (ii) an opinion letter for tax counsel to the Partnership that the project qualifies for the LIHTCs, and (iii) review and approval by Mid Penn of other documents it deemed necessary. All such initial conditions were satisfied and Mid Penn began funding the investment during 2018. As of December 31, 2018, the total investment in the limited partnership was $1,710,000 and was reported in other assets on the Consolidated Balance Sheet.
Income Taxes	(l) Income Taxes Mid Penn accounts for income taxes in accordance with income tax accounting guidance ASC Topic 740, Income Taxes Current income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. Mid Penn determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are reduced by a valuation allowance if, based on the weight of the evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. Mid Penn accounts for uncertain tax positions if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more-likely-than-not means a likelihood of more than 50%; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management's judgment. Mid Penn recognizes interest and penalties on income taxes, if any, as a component of income tax expense. In December, 2017, the Tax Cuts and Jobs Act (the “TCJA”) was enacted reducing the corporate tax rate applicable to Mid Penn, for tax years beginning after 2017, to a flat 21 percent rate. Though the reduced rate will provide tax savings to Mid Penn in future periods after 2017, the reduction resulted in a one-time $1,169,000 write-down of Mid Penn’s deferred tax asset in December 2017, because the deferred tax asset was previously valued based upon the projection of Mid Penn realizing a 34 percent future corporate tax rate benefit. This write-down was included in Mid Penn’s income tax provision for the year ended December 31, 2017, as further discussed in Note 18 (Federal Income Taxes) to the consolidated financial statements.
Core Deposit Intangible	(m) 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 intangibles was $6,893,000 and $308,000 at December 31, 2018 and 2017, respectively. Amortization expense is reflected in the Consolidated Statements of Income in intangible amortization and was $1,188,000, $86,000, and $96,000 for the years 2018, 2017, and 2016, respectively. The core deposit intangible for each respective acquisition (Phoenix in 2015, and Scottdale and First Priority in 2018) is being amortized over a ten-year period staring at the respective acquisition date and using a sum-of-the-year’s digits basis. Core deposit intangibles are subject to impairment testing whenever events or changes in circumstances indicate the need for such evaluation.
Goodwill	(n) 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 at December 31, 2018 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 must be tested when such events occur. In making this goodwill potential impairment assessment, 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. Changes in economic and operating conditions could result in goodwill impairment in future periods. Mid Penn did not identify any impairment on its outstanding goodwill from its most recent evaluation, which was performed as of October 31, 2018 using a qualitative analysis. In addition, Mid Penn did not identify any impairment in 2017 or 2016 using a similar qualitative analyses.
Bank Owned Life Insurance	(o) Bank Owned Life Insurance Mid Penn is the owner and beneficiary of bank-owned life insurance (“BOLI”) policies on current and former Mid Penn directors, as well as BOLI policies acquired through the Phoenix and First Priority acquisitions covering select Miners Bank and First Priority employees. The earnings from the BOLI policies are an asset that can be liquidated, if necessary, with associated tax costs. However, Mid Penn intends to hold these policies and, accordingly, Mid Penn has not provided deferred income taxes on the earnings from the increase in cash surrender value. Mid Penn is also party to certain Split-Dollar Life Insurance Arrangements, and in accordance with GAAP, has accrued a liability related to the postretirement benefits covered by an endorsement split-dollar life insurance arrangement, and a liability for the future death benefit.
Marketing and Advertising Costs	(p) Marketing and Advertising Costs Marketing and advertising costs are expensed as incurred.
Postretirement and Other Benefit Plans	(q) Postretirement Benefit Plans Mid Penn follows the guidance in ASC Topic 715, Compensation-Retirement Benefits As a result of the acquisition of Scottdale on January 8, 2018, Mid Penn assumed a noncontributory defined benefit pension plan covering certain former employees of Scottdale. A liability of $345,000 representing the funded status of the plan was included in other liabilities as of December 31, 2018. Additionally, for the year ended December 31, 2018, Mid Penn recognized $737,000 of settlement gains as a result of certain lump sum payouts to participants of the defined benefit pension plan. The settlement gains were recorded in noninterest income as a component of other income for the year ended December 31, 2018. (r) Other Benefit Plan A funded contributory defined-contribution plan is maintained for substantially all employees. The cost of the Mid Penn defined contribution plan is charged to current operating expenses and is funded annually. During 2018, Mid Penn assumed the 401(k) plans of Scottdale and First Priority and, as of December 31, 2018, these 401(k) plans were managed by Mid Penn’s Human Resources and Trust areas. These 401(k) plans were frozen and no contributions were made to the plans in 2018. The plans are being evaluated for either termination or merger into Mid Penn’s primary 401(k) plan.
Trust Assets and Income	(s) Trust Assets and Income Assets held by the Bank in a fiduciary or agency capacity for customers of the Trust Department are not included in the consolidated financial statements since such items are not assets of the Bank. Trust assets under management totaled $125,567,000 and $124,354,000 at December 31, 2018 and 2017, respectively. Most trust income is recognized on the cash basis, which is not materially different than if it were reported on the accrual basis.
Comprehensive Income	(t) 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 has 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 recognizing 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.
Restricted stock	(u) Restricted Stock On May 6, 2014, Mid Penn shareholders approved the 2014 Restricted Stock Plan (the “Plan”), which authorizes the issuance of awards that shall not exceed, in the aggregate, 100,000 shares of common stock. Awards under the Plan are limited to employees and directors of the Company and the Bank 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. The restricted stock is non-voting and non-participating until the granted shares vest. Once the shares vest, the recipient has full voting rights and is entitled to common stock dividends.
Earning Per Share	Earnings Per Share Earnings per share are computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during each of the years presented. The following data show the amounts used in computing basic earnings per share. (Dollars in thousands, except per share data) 2018 2017 2016 Net Income $ 10,596 $ 7,089 $ 7,804 Less: Dividends on Series D preferred stock 102 — — Net income available to common shareholders $ 10,494 $ 7,089 $ 7,804 Weighted average common shares outstanding 7,071,091 4,236,616 4,229,284 Basic earnings per common share $ 1.48 $ 1.67 $ 1.85 There were no antidilutive shares used in the calculation at December 31, 2018, 2017, and 2016.

Revenue Recognition (Policies)

Revenue Recognition (Policies)	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenue Recognition	Revenue Recognition 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 Activities Income from fiduciary activities consist of investment management fee income, brokerage transaction fee income, and estate fee income. Investment management fee income consists of advisory fees that are 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 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 interchange activity is received primarily daily, while some fees are aggregated and payment is received in the following month. Merchant Services Income Merchant services income is processed through a third party provider 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 third party 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.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Basic Earnings (Loss) Per Share	The following data show the amounts used in computing basic earnings per share. (Dollars in thousands, except per share data) 2018 2017 2016 Net Income $ 10,596 $ 7,089 $ 7,804 Less: Dividends on Series D preferred stock 102 — — Net income available to common shareholders $ 10,494 $ 7,089 $ 7,804 Weighted average common shares outstanding 7,071,091 4,236,616 4,229,284 Basic earnings per common share $ 1.48 $ 1.67 $ 1.85

Acquisition (Tables)

Acquisition (Tables)	12 Months Ended
	Dec. 31, 2018
Scottdale Bank and Trust Company [Member]
Allocation of the Purchase Price	The allocation of the purchase price is as follows: (Dollars in thousands) Assets acquired: Cash and cash equivalents $ 67,817 Investment securities 114,039 Restricted stock 97 Loans 70,769 Goodwill 19,178 Core deposit intangible 4,940 Premises and equipment 1,496 Foreclosed assets 11 Deferred income taxes 1,050 Accrued interest receivable 989 Other assets 266 Total assets acquired 280,652 Liabilities assumed: Deposits 209,981 Accrued interest payable 16 Other liabilities 3,682 Total liabilities assumed 213,679 Consideration paid $ 66,973 Cash paid $ 2,792 Fair value of common stock issued 64,181
Summary of the Final Estimated Fair Value of the Assets Acquired and Liabilities and Equity Assumed	The following table summarizes the final estimated fair value of the assets acquired and liabilities and equity assumed in the Scottdale transaction. (Dollars in thousands) Total purchase price (consideration paid) $ 66,973 Net assets acquired: Cash and cash equivalents 67,817 Investment securities 114,039 Restricted stock 97 Loans 70,769 Core deposit intangible 4,940 Premises and equipment 1,496 Foreclosed assets 11 Deferred income taxes 1,050 Accrued interest receivable 989 Other assets 266 Deposits (209,981 ) Accrued interest payable (16 ) Other liabilities (3,682 ) 47,795 Goodwill $ 19,178
Fair Value Adjustments Made to the Amortized Cost Basis, Presented at the Fair Value of Loans Acquired	The table below illustrates the fair value adjustments made to the amortized cost basis in order to present a fair value of the loans acquired. (Dollars in thousands) Gross amortized cost basis at January 8, 2018 $ 71,809 Market rate adjustment 601 Credit fair value adjustment on pools of homogeneous loans (995 ) Credit fair value adjustment on impaired loans (646 ) Fair value of purchased loans at January 8, 2018 $ 70,769
Fair Value of the Loans Acquired	The information about the acquired Scottdale impaired loan portfolio as of January 8, 2018 is as follows: (Dollars in thousands) Contractually required principal and interest at acquisition $ 2,586 Contractual cash flows not expected to be collected (nonaccretable discount) (1,010 ) Expected cash flows at acquisition 1,576 Interest component of expected cash flows (accretable discount) (305 ) Fair value of acquired loans $ 1,271
Pro Forma Information	The following table presents pro forma information as if the merger between Mid Penn Bank and Scottdale had been completed on January 1, 2017. (Dollars in thousands, except per share data) For the Year Ended December 31, 2018 2018 2017 Net interest income after loan loss provision $ 55,434 $ 43,371 Noninterest income 7,462 6,094 Noninterest expense 48,867 38,403 Net income 11,736 8,075 Net income per common share 1.64 1.32
First Priority Financial Corp. [Member]
Allocation of the Purchase Price	The allocation of the purchase price is as follows: (Dollars in thousands) Assets acquired: Cash and cash equivalents $ 11,398 Investment securities 62,977 Restricted stock 2,237 Loans 511,623 Goodwill 39,744 Core deposit intangible 2,832 Trade name intangible 205 Premises and equipment 1,147 Foreclosed assets 125 Deferred income taxes 3,140 Accrued interest receivable 2,293 Other assets 4,197 Total assets acquired 641,918 Liabilities assumed: Deposits 504,946 Borrowings 49,939 Accrued interest payable 1,073 Other liabilities 2,627 Total liabilities assumed 558,585 Equity acquired: Preferred stock 3,404 Total equity acquired and liabilities assumed 561,989 Consideration paid $ 79,929 Cash paid $ 3,807 Fair value of common stock issued 76,122
Summary of the Final Estimated Fair Value of the Assets Acquired and Liabilities and Equity Assumed	The following table summarizes the estimated fair value of the assets acquired and liabilities and equity assumed in the First Priority transaction that management believes are final, however, ASC 805 does allow for adjustments for a period up to one year from the merger date. (Dollars in thousands) Total purchase price (consideration paid) $ 79,929 Net assets acquired: Cash and cash equivalents 11,398 Investment securities 62,977 Restricted stock 2,237 Loans 511,623 Core deposit intangible 2,832 Trade name intangible 205 Premises and equipment 1,147 Foreclosed assets 125 Deferred income taxes 3,140 Accrued interest receivable 2,293 Other assets 4,197 Deposits (504,946 ) Borrowings (49,939 ) Accrued interest payable (1,073 ) Other liabilities (2,627 ) Preferred stock (3,404 ) 40,185 Goodwill $ 39,744
Fair Value Adjustments Made to the Amortized Cost Basis, Presented at the Fair Value of Loans Acquired	The table below illustrates the fair value adjustments made to the amortized cost basis in order to present a fair value of the loans acquired. (Dollars in thousands) Gross amortized cost basis at January 8, 2018 $ 521,644 Market rate adjustment (3,023 ) Credit fair value adjustment on pools of homogeneous loans (6,742 ) Credit fair value adjustment on impaired loans (256 ) Fair value of purchased loans at January 8, 2018 $ 511,623
Fair Value of the Loans Acquired	The information about the acquired First Priority impaired loan portfolio as of July 31, 2018 is as follows: (Dollars in thousands) Contractually required principal and interest at acquisition $ 1,855 Contractual cash flows not expected to be collected (nonaccretable discount) (858 ) Expected cash flows at acquisition 997 Interest component of expected cash flows (accretable discount) (125 ) Fair value of acquired loans $ 872
Pro Forma Information	The following table presents pro forma information as if the merger between Mid Penn and First Priority had been completed on January 1, 2017 (Dollars in thousands, except per share data) For the Year Ended December 31, 2018 2017 Net interest income after loan loss provision $ 66,370 $ 55,082 Noninterest income 7,845 6,748 Noninterest expense 55,689 49,268 Net income 15,469 9,170 Net income per common share 1.84 1.40

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive (Loss) Income (Tables)	12 Months Ended
	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes	The components of accumulated other comprehensive (loss) income, net of taxes, are as follows: (Dollars in thousands) Unrealized (Loss) Gain on Securities Defined Plan Liability Accumulated Other Comprehensive (Loss) Income Balance - December 31, 2018 $ (3,242 ) $ 864 $ (2,378 ) Balance - December 31, 2017 $ (2,159 ) $ 85 $ (2,074 )

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Securities Financing Transactions Disclosures [Abstract]
Unrealized Gain (Loss) on Investments	At December 31, 2018 and 2017, amortized cost, fair value, and unrealized gains and losses on investment securities are as follows: (Dollars in thousands) Amortized Unrealized Unrealized Fair December 31, 2018 Cost Gains Losses Value Available for sale securities: U.S. Treasury and U.S. government agencies $ 43,270 $ 10 $ 1,708 $ 41,572 Mortgage-backed U.S. government agencies 39,865 — 1,016 38,849 State and political subdivision obligations 30,642 11 1,397 29,256 Corporate debt securities 2,250 — 4 2,246 Total available for sale securities 116,027 21 4,125 111,923 Held to maturity securities: U.S. Treasury and U.S. government agencies $ 16,985 $ 14 $ 143 $ 16,856 Mortgage-backed U.S. government agencies 65,812 46 1,310 64,548 State and political subdivision obligations 84,034 457 842 83,649 Corporate debt securities 1,539 — 10 1,529 Total held to maturity securities 168,370 517 2,305 166,582 Total $ 284,397 $ 538 $ 6,430 $ 278,505 (Dollars in thousands) Amortized Unrealized Unrealized Fair December 31, 2017 Cost Gains Losses Value Available for sale securities: U.S. Treasury and U.S. government agencies $ 40,125 $ — $ 1,395 $ 38,730 Mortgage-backed U.S. government agencies 26,398 2 569 25,831 State and political subdivision obligations 27,775 7 739 27,043 Corporate debt securities 1,350 5 — 1,355 Total available-for-sale debt securities $ 95,648 $ 14 $ 2,703 $ 92,959 Available-for-sale equity securities: Equity securities 550 — 44 506 Total available-for-sale equity securities $ 550 $ — $ 44 $ 506 Held-to-maturity debt securities: U.S. Treasury and U.S. government agencies $ 10,984 $ — $ 90 $ 10,894 Mortgage-backed U.S. government agencies 53,472 — 523 52,949 State and political subdivision obligations 36,900 41 301 36,640 Total held-to-maturity debt securities 101,356 41 914 100,483 Total $ 197,554 $ 55 $ 3,661 $ 193,948
Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position	The following table presents gross unrealized losses and fair value of investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2018 and 2017. (Dollars in thousands) Less Than 12 Months 12 Months or More Total December 31, 2018 Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Available for sale securities: U.S. Treasury and U.S. government agencies 0 $ — $ — 21 $ 38,386 $ 1,708 21 $ 38,386 $ 1,708 Mortgage-backed U.S. government agencies 11 16,740 163 19 22,093 853 30 38,833 1,016 State and political subdivision obligations 3 1,751 23 51 24,520 1,374 54 26,271 1,397 Corporate debt securities 2 1,996 4 0 — — 2 1,996 4 Total temporarily impaired available for sale securities 16 20,487 190 91 84,999 3,935 107 105,486 4,125 Held to maturity securities: U.S. Treasury and U.S. government agencies 1 $ 1,985 $ 10 3 $ 8,852 $ 133 4 $ 10,837 $ 143 Mortgage-backed U.S. government agencies 10 16,165 79 35 42,431 1,231 45 58,596 1,310 State and political subdivision obligations 26 11,321 111 77 29,460 731 103 40,781 842 Corporate debt securities 1 1,529 10 0 — — 1 1,529 10 Total temporarily impaired held to maturity securities 38 31,000 210 115 80,743 2,095 153 111,743 2,305 Total 54 $ 51,487 $ 400 206 $ 165,742 $ 6,030 260 $ 217,229 $ 6,430 (Dollars in thousands) Less Than 12 Months 12 Months or More Total December 31, 2017 Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses Available for sale securities: U.S. Treasury and U.S. government agencies 3 $ 5,008 $ 184 18 $ 33,722 $ 1,211 21 $ 38,730 $ 1,395 Mortgage-backed U.S. government agencies 4 5,267 75 15 20,497 494 19 25,764 569 State and political subdivision obligations 11 6,144 102 40 19,091 637 51 25,235 739 Corporate debt securities 0 — — 0 — — 0 — — Equity securities 0 — — 1 506 44 1 506 44 Total temporarily impaired available for sale securities 18 16,419 361 74 73,816 2,386 92 90,235 2,747 Held to maturity securities: U.S. Treasury and U.S. government agencies 0 $ — $ — 4 $ 10,894 $ 90 4 $ 10,894 $ 90 Mortgage-backed U.S. government agencies 0 — — 35 52,949 523 35 52,949 523 State and political subdivision obligations 0 — — 77 29,976 301 77 29,976 301 Total temporarily impaired held to maturity securities 0 — — 116 93,819 914 116 93,819 914 Total 18 $ 16,419 $ 361 190 $ 167,635 $ 3,300 208 $ 184,054 $ 3,661
Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Securities	Gross realized gains and losses on sales of available-for-sale securities for the years ended December 31, 2018, 2017, and 2016 are shown in the table below. (Dollars in thousands) For the year ended December 31, 2018 2017 2016 Realized gains $ 150 $ 246 $ 1,927 Realized losses (13 ) (204 ) (881 ) Net gains $ 137 $ 42 $ 1,046
Investments Classified by Contractual Maturity Date	The table below is the maturity distribution of investment securities at amortized cost and fair value at December 31, 2018. (Dollars in thousands) Available for Sale Held to Maturity Amortized Fair Amortized Fair December 31, 2018 Cost Value Cost Value Due in 1 year or less $ — $ — $ 1,086 $ 1,087 Due after 1 year but within 5 years 25,285 24,732 18,745 18,597 Due after 5 years but within 10 years 43,070 41,027 82,727 82,350 Due after 10 years 7,807 7,315 — — 76,162 73,074 102,558 102,034 Mortgage-backed securities 39,865 38,849 65,812 64,548 $ 116,027 $ 111,923 $ 168,370 $ 166,582

Loans and Allowance for Loan _2

Loans and Allowance for Loan and Lease Losses (Tables)	12 Months Ended
	Dec. 31, 2018
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating	The classes of the loan portfolio, summarized by the aggregate pass rating, net of deferred fees and costs of $475,000 and $464,000 as of December 31, 2018 and 2017, respectively, and the classified ratings of special mention, substandard, and doubtful within Mid Penn’s internal risk rating system as of December 31, 2018 and 2017, are noted below: (Dollars in thousands) December 31, 2018 Pass Special Mention Substandard Doubtful Total Commercial and industrial $ 276,690 $ 2,769 $ 7,059 $ — $ 286,518 Commercial real estate 850,150 2,432 8,787 — 861,369 Commercial real estate - construction 141,806 — 367 — 142,173 Lease financing 53 — — — 53 Residential mortgage 251,151 147 2,245 — 253,543 Home equity 70,004 — 92 — 70,096 Consumer 10,315 — — — 10,315 $ 1,600,169 $ 5,348 $ 18,550 $ — $ 1,624,067 (Dollars in thousands) December 31, 2017 Pass Special Mention Substandard Doubtful Total Commercial and industrial $ 182,168 $ 453 $ 5,412 $ — $ 188,033 Commercial real estate 505,397 1,435 8,180 — 515,012 Commercial real estate - construction 61,667 182 487 — 62,336 Lease financing 229 — — — 229 Residential mortgage 97,814 157 1,062 — 99,033 Home equity 41,479 105 309 — 41,893 Consumer 3,868 — — — 3,868 $ 892,622 $ 2,332 $ 15,450 $ — $ 910,404
Impaired Loans by Loan Portfolio Class	Impaired loans by loan portfolio class as of December 31, 2018 and 2017 are summarized as follows: December 31, 2018 December 31, 2017 (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 $ — $ — $ — $ — $ 13 $ — Commercial real estate 2,007 2,276 — 3,424 4,056 — Commercial real estate - construction — — — — — — Lease financing — — — — — — Residential mortgage 657 811 — 760 877 — Home equity 30 106 — 260 295 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: * Commercial and industrial $ 28 $ 28 $ — $ — $ — $ — Commercial real estate 1,563 1,563 — 555 555 — Commercial real estate - construction — — — — — — Lease financing — — — — — — Residential mortgage 1,208 1,208 — 306 306 — Home equity 4 4 — — — — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 4,527 $ 4,635 $ 500 $ 4,434 $ 4,460 $ 136 Commercial real estate 721 721 204 1,423 1,589 293 Commercial real estate - construction 367 370 38 487 492 100 Lease financing — — — — — — Residential mortgage — — — — — — Home equity — — — — — — Consumer — — — — — — Total: Commercial and industrial $ 4,555 $ 4,663 $ 500 $ 4,434 $ 4,473 $ 136 Commercial real estate 4,291 4,560 204 5,402 6,200 293 Commercial real estate - construction 367 370 38 487 492 100 Lease financing — — — — — — Residential mortgage 2,019 1,865 — 1,066 1,183 — Home equity 34 110 — 260 295 —
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 years ended December 31, 2018, 2017, and 2016 are summarized as follows: December 31, 2018 December 31, 2017 December 31, 2016 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial and industrial $ — $ — $ 15 $ — $ 9 $ — Commercial real estate 3,048 3 1,915 279 820 — Commercial real estate - construction — — 164 — 124 — Lease financing — — — — — — Residential mortgage 754 29 890 18 821 21 Home equity 101 — 218 6 75 — Consumer — — — — — — With no related allowance recorded and acquired with credit deterioration: Commercial and industrial $ 23 $ — $ — $ — $ — $ — Commercial real estate 1,414 23 651 110 810 164 Commercial real estate - construction — — — — — — Lease financing — — — — — — Residential mortgage 832 — 332 — 378 4 Home equity 1 — — — — — Consumer — — — — — — With an allowance recorded: Commercial and industrial $ 4,437 $ — $ 1,779 $ — $ 59 $ — Commercial real estate 541 — 1,446 — 2,177 — Commercial real estate - construction 367 — 488 — 48 — Lease financing — — — — — — Residential mortgage — — — — 14 — Home equity — — — — 32 — Consumer — — — — — — Total: Commercial and industrial $ 4,460 $ — $ 1,794 $ — $ 68 $ — Commercial real estate 5,003 26 4,012 389 3,807 164 Commercial real estate - construction 367 — 652 — 172 — Lease financing — — — — — — Residential mortgage 1,586 29 1,222 18 1,213 25 Home equity 102 — 218 6 107 —
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 December 31, 2018 and 2017 are summarized as follows: (Dollars in thousands) 2018 2017 Commercial and industrial $ 4,555 $ 4,434 Commercial real estate 4,291 4,902 Commercial real estate - construction 367 487 Residential mortgage 1,502 492 Home equity 34 260 $ 10,749 $ 10,575
Loan Portfolio Summarized by the Past Due Status	The classes of the loan portfolio summarized by the past due status as of December 31, 2018 and 2017 are summarized as follows: (Dollars in thousands) December 31, 2018 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Total Past Due Current Total Loans Loans Receivable > 90 Days and Accruing Commercial and industrial: Commercial and industrial $ 17 $ — $ 4,527 $ 4,544 $ 281,946 $ 286,490 $ — Acquired with credit deterioration 23 5 — 28 — 28 — Commercial real estate: Commercial real estate 685 — 458 1,143 858,663 859,806 — Acquired with credit deterioration 29 — 1,534 1,563 — 1,563 — Commercial real estate - construction: Commercial real estate - construction — — 367 367 141,806 142,173 Lease financing: Lease financing — — — — 53 53 — Residential mortgage: Residential mortgage 461 - 277 738 251,597 252,335 — Acquired with credit deterioration 19 57 913 989 219 1,208 — Home equity: Home equity 166 22 25 213 69,879 70,092 — Acquired with credit deterioration — — 4 4 — 4 — Consumer: Consumer 57 5 — 62 10,253 10,315 — Total $ 1,457 $ 89 $ 8,105 $ 9,651 $ 1,614,416 $ 1,624,067 $ — (Dollars in thousands) December 31, 2017 30-59 Days Past Due 60-89 Days Past Due Greater than 90 Days Total Past Due Current Total Loans Loans Receivable > 90 Days and Accruing Commercial and industrial: Commercial and industrial $ 4,439 $ 16 $ — $ 4,455 $ 183,578 $ 188,033 $ — Commercial real estate: Commercial real estate — — 3,669 3,669 510,788 514,457 — Acquired with credit deterioration 500 — 55 555 — 555 — Commercial real estate - construction: Commercial real estate - construction — — 487 487 61,849 62,336 — Lease financing: Lease financing — — — — 229 229 — Residential mortgage: Residential mortgage 310 467 177 954 97,773 98,727 — Acquired with credit deterioration — 31 193 224 82 306 — Home equity: Home equity 54 98 250 402 41,491 41,893 — Consumer: Consumer 3 — — 3 3,865 3,868 — Total $ 5,306 $ 612 $ 4,831 $ 10,749 $ 899,655 $ 910,404 $ -
Allowance for Loan Losses and Recorded Investment in Financing Receivables	Activity in the allowance for loan and lease losses for the years ended December 31, 2018, 2017, and 2016, and the recorded investment in loans receivable as of December 31, 2018, 2017, and 2016 are as follows: (Dollars in thousands) December 31, 2018 Commercial and industrial Commercial real estate Commercial real estate - construction Lease financing Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance $ 1,795 $ 4,435 $ 178 $ — $ 428 $ 423 $ 3 $ 344 $ 7,606 Charge-offs (142 ) (64 ) (40 ) — (60 ) (185 ) (37 ) — (528 ) Recoveries 1 808 — — — 1 9 — 819 Provisions 737 (476 ) (63 ) — 85 289 32 (104 ) 500 Ending balance 2,391 4,703 75 — 453 528 7 240 8,397 Ending balance: individually evaluated for impairment 500 204 38 — — — — — 742 Ending balance: collectively evaluated for impairment $ 1,891 $ 4,499 $ 37 $ — $ 453 $ 528 $ 7 $ 240 $ 7,655 Loans receivable: Ending balance $ 286,518 $ 861,369 $ 142,173 $ 53 $ 253,543 $ 70,096 $ 10,315 $ — $ 1,624,067 Ending balance: individually evaluated for impairment 4,527 2,728 367 — 811 30 — — 8,463 Ending balance: acquired with credit deterioration 28 1,563 — — 1,208 4 — — 2,803 Ending balance: collectively evaluated for impairment $ 281,963 $ 857,078 $ 141,806 $ 53 $ 251,524 $ 70,062 $ 10,315 $ — $ 1,612,801 (Dollars in thousands) December 31, 2017 Commercial and industrial Commercial real estate Commercial real estate - construction Lease financing Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning balance $ 1,580 $ 4,323 $ 144 $ 1 $ 541 $ 379 $ 3 $ 212 $ 7,183 Charge-offs (25 ) (322 ) — — (102 ) (20 ) (28 ) — (497 ) Recoveries 26 553 — — 4 5 7 — 595 Provisions 214 (119 ) 34 (1 ) (15 ) 59 21 132 325 Ending balance 1,795 4,435 178 — 428 423 3 344 7,606 Ending balance: individually evaluated for impairment 136 293 100 — — — — — 529 Ending balance: collectively evaluated for impairment $ 1,659 $ 4,142 $ 78 $ — $ 428 $ 423 $ 3 $ 344 $ 7,077 Loans receivable: Ending balance $ 188,033 $ 515,012 $ 62,336 $ 229 $ 99,033 $ 41,893 $ 3,868 $ — $ 910,404 Ending balance: individually evaluated for impairment 4,434 4,847 487 — 760 260 — — 10,788 Ending balance: acquired with credit deterioration — 555 — — 306 — — — 861 Ending balance: collectively evaluated for impairment $ 183,599 $ 509,610 $ 61,849 $ 229 $ 97,967 $ 41,633 $ 3,868 $ — $ 898,755 (Dollars in thousands) December 31, 2016 Commercial and industrial Commercial real estate Commercial real estate - construction Lease financing Residential mortgage Home equity Consumer Unallocated Total Allowance for loan and lease losses: Beginning Balance $ 1,393 $ 3,552 $ 153 $ 1 $ 534 $ 317 $ 12 $ 206 $ 6,168 Charge-offs (820 ) (216 ) — — (4 ) (25 ) (42 ) — (1,107 ) Recoveries 4 211 — — 26 — 11 — 252 Provisions 1,003 776 (9 ) — (15 ) 87 22 6 1,870 Ending balance 1,580 4,323 144 1 541 379 3 212 7,183 Ending balance: individually evaluated for impairment 6 711 72 — 68 1 — — 858 Ending balance: collectively evaluated for impairment $ 1,574 $ 3,612 $ 72 $ 1 $ 473 $ 378 $ 3 $ 212 $ 6,325 Loans receivable: Ending balance $ 172,518 $ 446,524 $ 54,376 $ 425 $ 99,457 $ 37,608 $ 3,016 $ — $ 813,924 Ending balance: individually evaluated for impairment 60 3,246 860 — 916 140 — — 5,222 Ending balance: acquired with credit deterioration — 842 — — 389 — — — 1,231 Ending balance: collectively evaluated for impairment $ 172,458 $ 442,436 $ 53,516 $ 425 $ 98,152 $ 37,468 $ 3,016 $ — $ 807,471
Troubled Debt Restructurings	The recorded investments in troubled debt restructured loans at December 31, 2018 and 2017 are as follows: (Dollars in thousands) Pre-Modification Post-Modification December 31, 2018 Outstanding Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 4,110 $ 4,460 $ 4,302 Commercial real estate 2,940 2,841 2,201 Residential mortgage 677 675 516 Home equity 14 14 1 $ 7,741 $ 7,990 $ 7,020 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2017 Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial $ 4,110 $ 4,460 $ 4,434 Commercial real estate 5,735 5,581 4,593 Residential mortgage 677 675 540 Home equity 14 14 4 $ 10,536 $ 10,730 $ 9,571
Schedule of Troubled Debt Restructurings Modified in the Period	The following table summarizes the loans whose terms have been modified resulting in troubled debt restructurings during the years ended December 31, 2018, 2017, and 2016. (Dollars in thousands) Pre-Modification Post-Modification December 31, 2018 Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial real estate 1 $ 270 $ 270 $ 266 1 $ 270 $ 270 $ 266 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2017 Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial 1 $ 4,110 $ 4,460 $ 4,434 Commercial real estate 9 3,212 3,150 3,140 10 $ 7,322 $ 7,610 $ 7,574 (Dollars in thousands) Pre-Modification Post-Modification December 31, 2016 Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Recorded Investment Commercial and industrial 2 $ 934 $ 914 $ 914 Residential mortgage 1 68 68 68 3 $ 1,002 $ 982 $ 982
Schedule of Accretion of Purchased Impaired Loan	The following table provides activity for the accretable yield of purchased impaired loans for the year ended December 31, 2018. (Dollars in thousands) Accretable yield, January 1, 2018 $ 67 Acquisition of impaired loans $ 430 Accretable yield amortized to interest income (188 ) Accretable yield, December 31, 2018 $ 309

Bank Premises and Equipment (Ta

Bank Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Premises and Equipment	At December 31, 2018 and 2017, bank premises and equipment are as follows: (Dollars in thousands) 2018 2017 Land $ 4,305 $ 3,564 Buildings 19,490 8,632 Furniture, fixtures, and equipment 11,837 8,262 Leasehold improvements 1,363 1,126 Construction in progress 83 4,467 Total cost 37,078 26,051 Less accumulated depreciation (11,775 ) (9,883 ) Total bank premises and equipment $ 25,303 $ 16,168
Schedule of Future Minimum Rental Payments of Operating Leases	The following summary reflects the future minimum rental payments by year under Mid Penn’s operating leases as of December 31, 2018, including a breakdown of the sublease rental income and future minimum payments owed to related parties. (Dollars in thousands) Lease Obligation Sublease Rental Income Net Rental Expense 2019 2,171 81 2,090 2020 1,970 81 1,889 2021 1,603 20 1,583 2022 1,464 — 1,464 2023 1,245 — 1,245 thereafter 6,691 — 6,691 $ 15,144 $ 182 $ 14,962

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Time Deposits By Maturity Date	Time deposits at December 31, 2018, mature as follows: (Dollars in thousands) Time Deposits Less than $250,000 $250,000 or more Maturing in 2019 $ 199,257 $ 70,445 Maturing in 2020 129,223 8,618 Maturing in 2021 42,965 1,796 Maturing in 2022 19,370 2,499 Maturing in 2023 10,566 770 Maturing thereafter 820 — $ 402,201 $ 84,128

Short-term Borrowings (Tables)

Short-term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Short Term Borrowings [Abstract]
Summary of Various Sources of Short-Term Borrowed Funds	The following table outlines Mid Penn’s various sources of short-term borrowed funds at or for the years ended December 31, 2018 and 2017. The maximum balance represents the highest indebtedness for each category of short-term borrowed funds at any month-end during each of the years shown. (Dollars in thousands) December 31, 2018 2017 Federal funds purchased: Balance at year end $ — $ 34,511 Weighted average rate at year end 0 % 1.54 % Maximum month-end balance $ 35,050 $ 41,610 Average daily balance during the year $ 7,049 $ 7,961 Weighted average rate during the year 2.24 % 1.39 % FHLB short-term borrowings: Balance at year end $ 43,100 $ — Weighted average rate at year end 2.74 % 0.00 % Maximum month-end balance $ 43,100 $ — Average daily balance during the year $ 1,784 $ — Weighted average rate during the year 2.74 % 0.00 %

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2018
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 December 31, 2018 and December 31, 2017. (Dollars in thousands) At December 31, 2018 2017 Due July 2019, 1.64% $ 2,000 $ — Due December 2019, 1.87% 10,000 10,000 Due January 2020, 3.00% 5,000 — Due February 2020, 3.01% 5,000 — Due March 2020, 3.02% 5,000 — Due April 2020, 3.03% 5,000 — Due June 2020, 1.72% 2,000 — Due August 2020, 3.05% 5,000 — Due October 2020, 3.06% 5,000 — Due December 2020, 1.78% 2,000 — Due August 2026, 4.80% 2,076 2,295 Due February 2027, 6.71% 52 57 48,128 12,352 Less: fair value adjustment on debt assumed from acquisitions 104 — $ 48,024 $ 12,352

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
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 December 31, 2018 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2018 (Level 1) (Level 2) (Level 3) Available-for-sale debt securities: U.S. Treasury and U.S. government agencies $ 41,572 $ — $ 41,572 $ — Mortgage-backed U.S. government agencies 38,849 — 38,849 — State and political subdivision obligations 29,256 — 29,256 — Corporate debt securities 2,246 — 2,246 — Other assets: Equity securities 492 492 — — $ 112,415 $ 492 $ 111,923 $ — Fair value measurements at December 31, 2017 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2017 (Level 1) (Level 2) (Level 3) Available-for-sale debt securities: U.S. Treasury and U.S. government agencies $ 38,730 $ — $ 38,730 $ — Mortgage-backed U.S. government agencies 25,831 — 25,831 — State and political subdivision obligations 27,043 — 27,043 — Corporate debt securities 1,355 — 1,355 — Other assets: Equity securities 506 506 — — $ 93,465 $ 506 $ 92,959 $ —
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 December 31, 2018 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2018 (Level 1) (Level 2) (Level 3) Impaired Loans $ 4,935 $ — $ — $ 4,935 Foreclosed Assets Held for Sale 581 — — 581 Fair value measurements at December 31, 2017 using: (Dollars in thousands) Total carrying value at Quoted prices in active markets Significant other observable inputs Significant unobservable inputs Assets: December 31, 2017 (Level 1) (Level 2) (Level 3) Impaired Loans $ 6,090 $ — $ — $ 6,090 Foreclosed Assets Held for Sale — — — —
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 December 31, 2018 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 4,935 Appraisal of collateral (a), (c) Appraisal adjustments (b) 26% -100% 40% Foreclosed Assets Held for Sale 581 Appraisal of collateral (a), (c) Appraisal adjustments (b) 17% - 17% 17% (Dollars in thousands) Quantitative Information about Level 3 Fair Value Measurements December 31, 2017 Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average Impaired Loans $ 6,090 Appraisal of collateral (a), (c) Appraisal adjustments (b) 6% - 51% 28% Foreclosed Assets Held for Sale — Appraisal of collateral (a), (c) Appraisal adjustments (b) 0% - 0% 0% (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. (c) Includes qualitative adjustments by management and estimated liquidation expenses.
Fair Value, by Balance Sheet Grouping	The following table summarizes the carrying value and fair value of financial instruments at December 31, 2018 and 2017. (Dollars in thousands) December 31, 2018 December 31, 2017 Carrying Fair Carrying Fair Value Value Value Value Financial assets: Cash and cash equivalents $ 40,065 $ 40,065 $ 23,514 $ 23,514 Available for sale investment securities 111,923 111,923 93,465 93,465 Held to maturity investment securities 168,370 166,582 101,356 100,483 Loans held for sale 1,702 1,702 1,040 1,040 Equity securities 492 492 506 506 Net loans and leases 1,615,670 1,622,287 902,798 917,081 Restricted investment in bank stocks 6,646 6,646 4,384 4,384 Accrued interest receivable 8,244 8,244 4,564 4,564 Mortgage servicing rights 101 101 126 126 Financial liabilities: Deposits $ 1,726,026 $ 1,725,674 $ 1,023,568 $ 1,026,830 Short-term borrowings 43,100 43,100 34,611 34,611 Long-term debt 48,024 44,585 12,352 11,692 Subordinated debt 27,082 24,881 17,338 17,358 Accrued interest payable 2,262 2,262 645 645
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following presents the carrying amount, fair value, and placement in the fair value hierarchy of Mid Penn’s financial instruments as of December 31, 2018 and 2017. Carrying values approximate fair values for cash and cash equivalents, interest-bearing time balances with other financial institutions, 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, these instruments are Level 2 Inputs. The following tables exclude financial instruments for which the placement in the fair value hierarchy has been disclosed elsewhere or for which the carrying amount approximates fair value. Fair Value Measurements (Dollars in thousands) Quoted Prices Significant in Active Markets Other Significant for Identical Assets Observable Unobservable Carrying Fair or Liabilities Inputs Inputs December 31, 2018 Amount Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 168,370 $ 166,582 $ — $ 166,582 $ — Net loans and leases 1,615,670 1,622,287 — — 1,622,287 Financial instruments - liabilities Deposits $ 1,726,026 $ 1,725,674 $ — $ 1,725,674 $ — Long-term debt 48,024 44,585 — 44,585 — Subordinated debt 27,082 24,881 — 24,881 — Fair Value Measurements (Dollars in thousands) Quoted Prices Significant in Active Markets Other Significant for Identical Observable Unobservable Carrying Fair or Liabilities Inputs Inputs December 31, 2017 Amount Value (Level 1) (Level 2) (Level 3) Financial instruments - assets Held-to-maturity investment securities $ 101,356 $ 100,483 $ — $ 100,483 $ — Net loans and leases 902,798 917,081 — — 917,081 Financial instruments - liabilities Deposits $ 1,023,568 $ 1,026,830 $ — $ 1,026,830 $ — Long-term debt 12,352 11,692 — 11,692 — Subordinated debt 17,338 17,358 — 17,358 —

Postretirement Benefit Plans (T

Postretirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Funded Status	The following tables provide a reconciliation of the changes in the plan’s health and life insurance benefit obligations and fair value of plan assets for the years ended December 31, 2018 and 2017, and a statement of the funded status at December 31, 2018 and 2017. (Dollars in thousands) December 31, Change in benefit obligations: 2018 2017 Benefit obligations, January 1 $ 508 $ 540 Service cost 4 4 Interest cost 17 20 Change in experience (38 ) (11 ) Change in assumptions (17 ) 20 Change due to plan amendment $ 60 — Benefit payments (59 ) (65 ) Benefit obligations, December 31 $ 475 $ 508 Change in fair value of plan assets: Fair value of plan assets, January 1 $ — $ — Employer contributions 59 65 Benefit payments (59 ) (65 ) Fair value of plan assets, December 31 $ — $ — Funded status at year end $ (475 ) $ (508 )
Schedule of Amounts Recognized in Balance Sheet	The amount recognized in other liabilities on the consolidated balance sheets at December 31, 2018 and 2017, is as follows: (Dollars in thousands) 2018 2017 Accrued benefit liability $ 475 $ 508
Schedule of Amounts Recognized in Other Comprehensive (Loss) Income	The amounts recognized in accumulated other comprehensive loss consist of: (Dollars in thousands) December 31, 2018 2017 Net gain, pretax $ (76 ) $ (22 ) Net prior service cost, pretax (89 ) (174 )
Schedule of Net Periodic Benefit (Income) Costs	The components of net periodic postretirement benefit (income) cost for 2018, 2017 and 2016 are as follows: (Dollars in thousands) 2018 2017 2016 Service cost $ 4 $ 4 $ 4 Interest cost 17 20 23 Amortization of prior service cost (25 ) (35 ) (35 ) Amortization of net (gain) or loss (1 ) — — Net periodic postretirement benefit (income) cost $ (5 ) $ (11 ) $ (8 )
Schedule of Assumptions Used	Assumptions used in the measurement of Mid Penn’s benefit obligations at December 31, 2018 and 2017 are as follows: Weighted-average assumptions: 2018 2017 Discount rate 4.00 % 3.50 % Rate of compensation increase 3.00 % 2.50 % Assumptions used in the measurement of Mid Penn’s net periodic benefit cost for the years ended December 31, 2018, 2017 and 2016 are as follows: Weighted-average assumptions: 2018 2017 2016 Discount rate 3.50 % 4.00 % 4.25 % Rate of compensation increase 2.50 % 3.00 % 3.25 %
Schedule of Health Care Cost Trend Rates	Assumed health care cost trend rates at December 31, 2018, 2017 and 2016 are as follows: 2018 2017 2016 Health care cost trend rate assumed for next year 5.50 % 6.00 % 6.00 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 5.40 % 5.40 % 5.50 % Year that the rate reaches the ultimate trend rate 2022 2024 2018
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. At December 31, 2018, a one-percentage-point change in assumed health care cost trend rates would have the following effects: (Dollars in thousands) One-Percentage Point Increase Decrease Effect on total of service and interest cost $ — $ — Effect on accumulated postretirement benefit obligation 6 (9 )
Schedule of Expected Benefit Payments	Mid Penn expects to contribute $60,000 to its life and health benefit plans in 2019. The following table shows the estimated benefit payments for future periods. (Dollars in thousands) 1/1/2019 to 12/31/2019 $ 60 1/1/2020 to 12/31/2020 50 1/1/2021 to 12/31/2021 34 1/1/2022 to 12/31/2022 38 1/1/2023 to 12/31/2023 31 1/1/2024 to 12/31/2028 160
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Funded Status	The following tables provide a reconciliation of the changes in the directors’ defined benefit plan’s benefit obligations and fair value of plan assets for the years ended December 31, 2018 and 2017, and a statement of the status at December 31, 2018 and 2017. This Plan is unfunded. (Dollars in thousands) December 31, Change in benefit obligations: 2018 2017 Benefit obligations, January 1 $ 1,116 $ 1,122 Service cost 36 35 Interest cost 38 43 Actuarial gain (loss) 5 6 Change in assumptions (5 ) 2 Benefit payments (90 ) (92 ) Benefit obligations, December 31 $ 1,100 $ 1,116 Change in fair value of plan assets: Fair value of plan assets, January 1 $ — $ — Employer contributions 90 92 Benefit payments (90 ) (92 ) Fair value of plan assets, December 31 $ — $ — Funded status at year end $ (1,100 ) $ (1,116 )
Schedule of Amounts Recognized in Balance Sheet	Amounts recognized in other liabilities on the consolidated balance sheet at December 31, 2018 and 2017 are as follows: (Dollars in thousands) 2018 2017 Accrued benefit liability $ 1,100 $ 1,116
Schedule of Amounts Recognized in Other Comprehensive (Loss) Income	Amounts recognized in accumulated other comprehensive loss consist of: (Dollars in thousands) December 31, 2018 2017 Net prior service cost, pretax $ — $ 22 Net loss, pretax 67 67
Schedule of Net Periodic Benefit (Income) Costs	The components of net periodic retirement cost for 2018, 2017 and 2016 are as follows: (Dollars in thousands) 2018 2017 2016 Service cost $ 36 $ 35 $ 34 Interest cost 38 43 46 Amortization of prior-service cost 22 22 22 Net periodic retirement cost $ 96 $ 100 $ 102
Schedule of Assumptions Used	Assumptions used in the measurement of Mid Penn’s benefit obligations at December 31, 2018 and 2017 are as follows: Weighted-average assumptions: 2018 2017 Discount rate 4.00 % 3.50 % Change in consumer price index 2.00 % 1.50 % Assumptions used in the measurement of Mid Penn’s net periodic benefit cost for the years ended December 31, 2018, 2017 and 2016 are as follows: Weighted-average assumptions: 2018 2017 2016 Discount rate 4.00 % 4.00 % 4.25 % Change in consumer price index 2.00 % 1.50 % 2.25 %
Schedule of Expected Benefit Payments	Mid Penn expects to contribute $95,000 to its retirement plan in 2019. The following table shows the estimated benefit payments for future periods. (Dollars in thousands) 1/1/2019 to 12/31/2019 $ 95 1/1/2020 to 12/31/2020 97 1/1/2021 to 12/31/2021 108 1/1/2022 to 12/31/2022 107 1/1/2023 to 12/31/2024 106 1/1/2024 to 12/31/2028 376
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Funded Status	The following tables provide a reconciliation of the changes in the defined benefit pension plan’s benefit obligations and fair value of plan assets for the year ended December 31, 2018, and a statement of the status at December 31, 2018. (Dollars in thousands) December 31, Change in benefit obligations: 2018 Benefit obligations, January 1 $ 10,542 Service cost 287 Interest cost 392 Settlement loss 118 Actuarial gain (2,271 ) Settlement payments (3,828 ) Benefit payments (77 ) Benefit obligations, December 31 $ 5,163 Change in fair value of plan assets: Fair value of plan assets, January 1 $ 8,121 Return on plan assets $ 57 Employer contributions 600 Benefit payments (77 ) Administrative expenses (55 ) Settlement payments (3,828 ) Fair value of plan assets, December 31 $ 4,818 Funded status at year end $ (345 )
Schedule of Amounts Recognized in Balance Sheet	Amounts recognized in other liabilities on the consolidated balance sheet at December 31, 2018 and 2017 are as follows: (Dollars in thousands) 2018 Accrued benefit liability $ 345
Schedule of Amounts Recognized in Other Comprehensive (Loss) Income	Amounts recognized in accumulated other comprehensive loss consist of: (Dollars in thousands) December 31, 2018 Unrecognized actuarial gain $ 994
Schedule of Net Periodic Benefit (Income) Costs	The components of net periodic retirement cost for 2018 are as follows: (Dollars in thousands) 2018 Service cost $ 287 Interest cost 392 Expected return on plan assets (423 ) Net periodic retirement cost $ 256
Schedule of Assumptions Used	Assumptions used in the measurement of Mid Penn’s benefit obligations at December 31, 2018 are as follows: Weighted-average assumptions: 2018 Discount rate 4.25 % Expected long-term return on plan assets 5.00 % Rate of compensation increases 3.00 % Assumptions used in the measurement of Mid Penn’s net periodic benefit cost for the years ended December 31, 2018 are as follows: Weighted-average assumptions: 2018 Discount rate 4.25 % Expected long-term return on plan assets 5.00 % Rate of compensation increases 3.00 %
Schedule of Expected Benefit Payments	Mid Penn expects to contribute $600,000 to the defined benefit pension plan in 2019. The following table shows the estimated benefit payments for future periods. (Dollars in thousands) 1/1/2019 to 12/31/2019 $ 92 1/1/2020 to 12/31/2020 115 1/1/2021 to 12/31/2021 144 1/1/2022 to 12/31/2022 160 1/1/2023 to 12/31/2024 162 1/1/2024 to 12/31/2028 1,714
Schedule of Plan's Weighted Average Asset Allocation by Investment Category	The plan’s weighted-average asset allocations by investment category as of December 31, 2018 are as follows: Weighted-average asset allocations: 2018 Cash and cash equivalents 50.44 % Common stock 38.14 % Corporate bonds 11.42 % 100.00 %
Schedule of Plan Assets at Fair Value	The following table sets forth by level, within the fair value hierarchy, the plan’s assets at fair value as of December 31, 2018. Fair Value Measurements (Dollars in thousands) Quoted prices in active markets Significant other observable inputs Significant unobservable inputs December 31, 2018 (Level 1) (Level 2) (Level 3) Cash and cash equivalents $ 2,430 $ — $ — Common stock: Mining 36 — — Manufacturing 888 — — Transportation, Communications, Electric, Gas, and Sanitary Services 468 — — Finance, Insurance, and Real Estate 248 — — Services 189 — — Other 9 — — Corporate bonds — 550 — $ 4,268 $ 550 $ —

Other Benefit Plans (Tables)

Other Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Schedule of Employees Eligible to Participate in Employee Stock Purchase Plan	Mid Penn has an Employee Stock Purchase Plan (“ESPP”) in which all employees are eligible to participate. The plan allows employees to use a portion of their salaries and wages to purchase shares of Mid Penn common stock at the market value of shares at the end of each calendar quarter. 2018 2017 2016 ESPP shares purchased 4,132 3,578 4,465 Average purchase price per share $ 28.716 $ 29.027 $ 18.520

Federal Income Taxes (Tables)

Federal Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Net Deferred Tax Asset	The following temporary differences gave rise to the net deferred tax asset at December 31, 2018 and 2017. (Dollars in thousands) 2018 2017 Deferred tax assets: Allowance for loan and lease losses $ 1,763 $ 1,597 Loan fees 136 105 Deferred compensation 508 221 Benefit plans 134 320 Unrealized loss on securities 862 574 Sale/leaseback adjustment 66 72 Business combination adjustments 1,692 358 Acquired NOL and charitable contribution carryforwards 1,391 — Acquired AMT carryforward 1,433 — Other 128 108 8,113 3,355 Deferred tax liabilities: Depreciation (1,073 ) (619 ) Bond accretion (29 ) (9 ) Goodwill and intangibles (348 ) (329 ) Prepaid expenses (515 ) (333 ) Business combination adjustments (948 ) (176 ) Benefit plans (459 ) — Other (45 ) (1 ) (3,417 ) (1,467 ) Deferred tax asset, net $ 4,696 $ 1,888
Provision for Income Taxes	The provision for income taxes consists of the following: (Dollars in thousands) 2018 2017 2016 Current expense $ 812 $ 2,672 $ 2,613 Deferred expense (benefit) 1,317 1,828 (336 ) Total provision for income taxes $ 2,129 $ 4,500 $ 2,277
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of income tax at the statutory rate of 21% for 2018 and 34% for 2017 and 2016 to Mid Penn's effective rate is as follows: (Dollars in thousands) 2018 2017 2016 Provision at the expected statutory rate $ 2,672 $ 3,940 $ 3,428 Effect of tax-exempt income (704 ) (668 ) (1,089 ) Effect of investment in life insurance (60 ) (89 ) (90 ) Nondeductible interest 40 30 41 Nondeductible merger and acquisition expense 193 191 — Rate change adjustment — 1,169 — Other items (12 ) (73 ) (13 ) Provision for income taxes $ 2,129 $ 4,500 $ 2,277

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Capital Levels And Related Ratios	Mid Penn maintained the following regulatory capital levels, leverage ratios, and risk-based capital ratios as of December 31, 2018, and December 31, 2017: (Dollars in thousands) Capital Adequacy To Well-Capitalized Under Prompt Minimum Capital Corrective Actual Required (1) Action Provisions Amount Ratio Amount Ratio Amount Ratio Corporation As of December 31, 2018 Tier 1 Capital (to Average Assets) $ 155,662 8.0 % $ 77,499 4.000 % $ N/A N/A Common Equity Tier 1 Capital (to Risk Weighted Assets) 155,662 10.0 % 98,977 6.375 % N/A N/A Tier 1 Capital (to Risk Weighted Assets) 155,662 10.0 % 122,265 7.875 % N/A N/A Total Capital (to Risk Weighted Assets) 191,300 12.3 % 153,317 9.875 % N/A N/A Bank As of December 31, 2018 Tier 1 Capital (to Average Assets) $ 171,776 8.9 % $ 77,230 4.000 % $ 96,537 5.0 % Common Equity Tier 1 Capital (to Risk Weighted Assets) 171,776 11.1 % 98,963 6.375 % 100,903 6.5 % Tier 1 Capital (to Risk Weighted Assets) 171,776 11.1 % 122,248 7.875 % 124,189 8.0 % Total Capital (to Risk Weighted Assets) 180,332 11.6 % 153,295 9.875 % 155,236 10.0 % Corporation As of December 31, 2017 Tier 1 Capital (to Average Assets) $ 74,417 6.5 % $ 45,857 4.000 % $ N/A N/A Common Equity Tier 1 Capital (to Risk Weighted Assets) 74,417 8.4 % 50,661 5.750 % N/A N/A Tier 1 Capital (to Risk Weighted Assets) 74,417 8.4 % 63,877 7.250 % N/A N/A Total Capital (to Risk Weighted Assets) 99,466 11.3 % 81,498 9.250 % N/A N/A Bank As of December 31, 2017 Tier 1 Capital (to Average Assets) $ 88,294 7.7 % $ 45,846 4.000 % $ 57,308 5.0 % Common Equity Tier 1 Capital (to Risk Weighted Assets) 88,294 10.0 % 50,661 5.750 % 57,269 6.5 % Tier 1 Capital (to Risk Weighted Assets) 88,294 10.0 % 63,877 7.250 % 70,485 8.0 % Total Capital (to Risk Weighted Assets) 96,005 10.9 % 81,498 9.250 % 88,106 10.0 % (1) The minimum amounts and ratios as of December 31, 2018 include the third year phase in of the capital conservation buffer of 1.875% required by the Basel III framework. As of December 31, 2017, minimum amounts and ratios include the second year phase in of the capital conservation buffer of 1.25% required by the Basel III framework.

Common Stock (Tables)

Common Stock (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Compensation Expense and Related Tax Benefits for Restricted Stock Awards Recognized	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. Restricted shares granted to employees vest in equal amounts on the anniversary of the grant date over a four year vesting period. Restricted shares granted to directors have a twelve month vesting period. The following table presents compensation expense and related tax benefits for restricted stock awards recognized on the consolidated statements of income. (Dollars in thousands) 2018 2017 2016 Compensation expense $ 267 $ 145 $ 53 Tax benefit (56 ) (49 ) (18 ) Net income effect $ 211 $ 96 $ 35
Schedule of Non-Vested Restricted Stock	The following table presents information regarding the non-vested restricted stock for the year ended December 31, 2018. Shares Weighted-Average Grant Date Fair Value Non-vested at January 1, 2018 19,499 $ 22.54 Vested (9,647 ) 22.85 Forfeited (1,876 ) 24.20 Granted 12,250 33.50 Non-vested at December 31, 2018 20,226 28.76

Parent Company Statements (Tabl

Parent Company Statements (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets	CONDENSED BALANCE SHEETS (Dollars in thousands) December 31, 2018 2017 ASSETS Cash and cash equivalents $ 1,572 $ 4,686 Investment in subsidiaries 239,323 89,581 Other assets 296 — Total assets $ 241,191 $ 94,267 LIABILITIES AND SHAREHOLDERS' EQUITY Subordinated debt $ 17,694 $ 17,338 Other liabilities 288 1,226 Shareholders' equity 223,209 75,703 Total liabilities and shareholders' equity $ 241,191 $ 94,267
Condensed Statements of Income and Comprehensive Income	CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Dollars in thousands) For Years Ended December 31, 2018 2017 2016 Income Dividends from subsidiaries $ 10,837 $ 9,657 $ 2,871 Other income — 19 33 Total Income 10,837 9,676 2,904 Expense Other expenses (5,668 ) (1,899 ) (606 ) Total Expense (5,668 ) (1,899 ) (606 ) Income before income tax and equity in undistributed earnings (loss) of subsidiary 5,169 7,777 2,298 Equity in undistributed earnings (loss) of subsidiary 4,207 (1,136 ) 5,311 Income before income tax 9,376 6,641 7,609 Income tax benefit 1,220 448 195 Net income 10,596 7,089 7,804 Series D preferred stock dividends 102 — — Net income available to common shareholders $ 10,494 $ 7,089 $ 7,804 Comprehensive income $ 10,257 $ 8,209 $ 3,139
Condensed Statement of Cash Flows	CONDENSED STATEMENTS OF CASH FLOWS (Dollars in thousands) For Years Ended December 31, 2018 2017 2016 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 10,596 $ 7,089 $ 7,804 Equity in undistributed loss (earnings) of subsidiaries (4,207 ) 1,136 (5,311 ) Decrease (increase) in other assets (49 ) 240 59 Increase (decrease) in other liabilities 1,120 626 457 Net cash provided by operating activities 7,460 9,091 3,009 CASH FLOWS FROM INVESTING ACTIVITIES Net cash paid for acquisitions (2,798 ) — — Proceeds from the sale of investment securities — 618 — Repayment from (investment in) subsidiary — (12,600 ) — Net cash used in investing activities (2,798 ) (11,982 ) — CASH FLOWS FROM FINANCING ACTIVITIES Dividends paid (4,513 ) (3,264 ) (2,875 ) Series D preferred stock dividends (102 ) — — Series D preferred stock redemption (3,404 ) — — Employee Stock Purchase Plan 119 104 82 Director Stock Purchase Plan 124 42 — Deferred financing fees paid for subordinated debt issuance — (85 ) — Subordinated debt issuance — 10,000 — Net cash provided by (used in) financing activities (7,776 ) 6,797 (2,793 ) Net increase in cash and cash equivalents (3,114 ) 3,906 216 Cash and cash equivalents, beginning of year 4,686 780 564 Cash and cash equivalents, end of year $ 1,572 $ 4,686 $ 780

Summary of Quarterly Consolid_2

Summary of Quarterly Consolidated Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Quarterly Condensed Financials	The following table presents summarized quarterly financial data for 2018 and 2017. Due to the methodology and rounding of quarterly earnings per share versus full-year earnings per share calculations, the quarterly measures may not equal to the full-year measurement disclosed on the respective year’s income statement. (Dollars in thousands, except per share data) 2018 Quarter Ended March 31 June 30 September 30 December 31 Interest Income $ 12,980 $ 13,720 $ 19,583 $ 22,371 Interest Expense 2,102 2,306 3,672 4,640 Net Interest Income 10,878 11,414 15,911 17,731 Provision for Loan and Lease Losses 125 — 100 275 Net Interest Income After Provision for Loan Losses 10,753 11,414 15,811 17,456 Noninterest Income 1,647 1,559 2,165 2,091 Noninterest Expense 11,183 9,742 15,264 13,982 Income Before Provision for Income Taxes 1,217 3,231 2,712 5,565 Provision for Income Taxes 213 452 548 916 Net Income 1,004 2,779 2,164 4,649 Series D Preferred Stock Dividends — — 38 64 Net Income Available to Common Shareholders $ 1,004 $ 2,779 $ 2,126 $ 4,585 Per Share Data: Basic Earnings Per Common Share $ 0.17 $ 0.45 $ 0.28 $ 0.54 Cash Dividends Declared 0.00 0.15 0.15 0.15 (Dollars in thousands, except per share data) 2017 Quarter Ended March 31 June 30 September 30 December 31 Interest Income $ 10,559 $ 10,879 $ 11,150 $ 11,304 Interest Expense 1,384 1,469 1,634 1,817 Net Interest Income 9,175 9,410 9,516 9,487 Provision for Loan and Lease Losses 125 100 - 100 Net Interest Income After Provision for Loan Losses 9,050 9,310 9,516 9,387 Noninterest Income 1,436 1,362 1,564 1,331 Noninterest Expense 7,802 7,558 7,960 8,047 Income Before Provision for Income Taxes 2,684 3,114 3,120 2,671 Provision for Income Taxes 690 769 871 2,170 Net Income Available to Common Shareholders $ 1,994 $ 2,345 $ 2,249 $ 501 Per Share Data: Basic Earnings Per Common Share $ 0.47 $ 0.55 $ 0.53 $ 0.12 Cash Dividends Declared 0.13 0.13 0.13 0.38

Basis of Presentation (Narrativ

Basis of Presentation (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018Segment
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of reportable segments	1

Nature of Business (Narrative)

Nature of Business (Narrative) (Details)	Dec. 31, 2018Store
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of offices	38

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended	10 Months Ended	12 Months Ended				36 Months Ended
	Jun. 30, 2018USD ($)Apartment	Oct. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2018USD ($)	Jun. 25, 2014shares	May 06, 2014shares
Other securities			$ 595,000	$ 217,000	$ 304,000
Residential real estate held in other real estate owned			844,000	42,000			$ 844,000
Foreclosure proceedings in process			211,000	308,000			211,000
Mortgage servicing rights			106,000	126,000			106,000
Mortgage servicing rights, amortization			20,000	18,000	30,000
Impairment of mortgage servicing rights							0
Principal balance of loans serviced			15,601,000	17,963,000			15,601,000
Total investment in limited partnership			$ 233,000	277,000			233,000
Low Income Housing Tax Credit				$ 76,000	$ 76,000	$ 76,000
Number of apartments under the project | Apartment	37
Limited partner capital contribution commitment	$ 7,579,000
Project investment amortization period	10 years
Annual LIHTCs mount awarded for the project	$ 861,000
Total anticipated LIHTCs amount under the housing project	8,613,000
Federal tax rate			21.00%	34.00%	34.00%
Reduction in write-down of deferred tax asset				$ 1,169,000
Amortization expense			$ 1,224,000	104,000	$ 126,000
Goodwill, Impairment Loss		$ 0		0	0
Liability of funded status			345,000				345,000
Settlement gains recognized			737,000
Trust assets			125,567,000	124,354,000			125,567,000
2014 Restricted Stock Plan [Member]
Shares authorized per plan | shares								100,000	100,000
401(k) Plan [Member]
Defined contribution plan, associated expense			514,000	383,000	362,000
First Priority Financial Corp. [Member]
Goodwill acquired			39,744,000
Scottdale Bank and Trust Company [Member]
Goodwill acquired			19,178,000
Phoenix Bancorp Incorporated [Member]
Goodwill acquired			3,918,000
Scottdale and First Priority [Member] | 401(k) Plan [Member]
Defined contribution plan, associated expense			$ 0
Core Deposit Intangible [Member]
Core Deposit Intangible, Amortization Period			10 years
Intangible assets, net			$ 6,893,000	308,000			6,893,000
Amortization expense			1,188,000	86,000	$ 96,000
Other Assets [Member]
Total investment in limited partnership	$ 1,710,000		1,710,000				1,710,000
Federal Home Loan Bank of Pittsburgh [Member]
Other securities			275,000	114,000
Reserve for Off-balance Sheet Activities [Member]
Valuation allowances and reserves, balance			$ 159,000	$ 105,000			$ 159,000
Commercial [Member]
Loan terms			1 year
Loan to value ratio			80.00%				80.00%
Maximum [Member]
Maturity of interest bearing time deposits with other financial institutions			1 year
Non-residential consumer loans charged off on contractual basis in event of bankruptcy, in period			120 days
Maximum [Member] | Building Assets [Member]
Property, plant and equipment, useful life			50 years
Maximum [Member] | Furniture, Fixtures, and Equipment [Member]
Property, plant and equipment, useful life			10 years
Maximum [Member] | Land Improvements [Member]
Property, plant and equipment, useful life			20 years
Maximum [Member] | Leasehold Improvements [Member]
Property, plant and equipment, useful life			15 years
Maximum [Member] | Home equity lines of credit [Member]
Loan terms			20 years
Loan to value ratio			85.00%				85.00%
Maximum [Member] | Home Equity Lines Of Credit [Member]
Loan terms			5 years
Maximum [Member] | Residential Portfolio [Member]
Loan terms			30 years
Loan to value ratio			100.00%				100.00%
Loan to value ratio, exposure after private mortgage insurance			85.00%
Minimum [Member] | Building Assets [Member]
Property, plant and equipment, useful life			5 years
Minimum [Member] | Furniture, Fixtures, and Equipment [Member]
Property, plant and equipment, useful life			3 years
Minimum [Member] | Land Improvements [Member]
Property, plant and equipment, useful life			10 years
Minimum [Member] | Leasehold Improvements [Member]
Property, plant and equipment, useful life			10 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Basic Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net Income	$ 4,649	$ 2,164	$ 2,779	$ 1,004					$ 10,596	$ 7,089	$ 7,804
Less: Dividends on Series D preferred stock	64	38							102
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 4,585	$ 2,126	$ 2,779	$ 1,004	$ 501	$ 2,249	$ 2,345	$ 1,994	$ 10,494	$ 7,089	$ 7,804
Weighted average common shares outstanding									7,071,091	4,236,616	4,229,284
Basic earnings per common share	$ 0.54	$ 0.28	$ 0.45	$ 0.17	$ 0.12	$ 0.53	$ 0.55	$ 0.47	$ 1.48	$ 1.67	$ 1.85

Acquisition of The Scottdale Ba

Acquisition of The Scottdale Bank and Trust Company (Narrative) (Details) - USD ($)	Jan. 08, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 07, 2018
Business Acquisition [Line Items]
Goodwill		$ 62,840,000	$ 3,918,000
Amortization expense		1,224,000	104,000	$ 126,000
Scottdale Bank and Trust Company [Member]
Business Acquisition [Line Items]
Date of acquisition	Jan. 8, 2018
Per share price	$ 34.16				$ 1,166
Ratio of conversion of acquiree's shares to entity's shares	38.88%
Common stock shares issued to acquire the company	1,878,827
Business combination, consideration transferred, equity interests issued and issuable	$ 64,181,000
Payments to acquire businesses gross	2,792,000
Business combination consideration transferred	66,973,000
Goodwill	19,178,000
Finite-lived intangible assets acquired	$ 4,940,000
Acquired finite-lived intangible assets, weighted average useful life	10 years
Finite-lived intangible assets, amortization expense, next twelve months	$ 808,000
Finite-lived intangible assets, amortization expense, year two	719,000
Finite-lived intangible assets, amortization expense, year three	629,000
Finite-lived intangible assets, amortization expense, year four	539,000
Finite-lived intangible assets, amortization expense, year five	449,000
Finite lived intangible assets, amortization expense, four years after year five	898,000
Fair value of purchased loans	$ 70,769,000
Pro forma earnings		11,736,000	$ 8,075,000
Severance and retention bonus expenses		518,000
Scottdale Bank and Trust Company [Member] | Excluded Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Pro forma earnings		1,304,000
Income tax nondeductible expenses		205,000
Scottdale Bank and Trust Company [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Amortization expense		$ 898,000

Acquisition of The Scottdale _2

Acquisition of The Scottdale Bank and Trust Company (Allocation of the Purchase Price) (Details) - USD ($)	Jan. 08, 2018	Dec. 31, 2018	Dec. 31, 2017
Assets acquired:
Goodwill		$ 62,840,000	$ 3,918,000
Scottdale Bank and Trust Company [Member]
Assets acquired:
Cash and cash equivalents	$ 67,817,000
Investment securities	114,039,000
Restricted stock	97,000
Loans	70,769,000
Goodwill	19,178,000
Core deposit intangible	4,940,000
Premises and equipment	1,496,000
Foreclosed assets	11,000
Deferred income taxes	1,050,000
Accrued interest receivable	989,000
Other assets	266,000
Total assets acquired	280,652,000
Liabilities assumed:
Deposits	209,981,000
Accrued interest payable	16,000
Other liabilities	3,682,000
Total liabilities assumed	213,679,000
Consideration paid	66,973,000
Cash paid	2,792,000
Fair value of common stock issued	$ 64,181,000

Acquisition of The Scottdale _3

Acquisition of The Scottdale Bank and Trust Company (Estimated Fair Value of Assets Acquired) (Details) - USD ($)	Jan. 08, 2018	Dec. 31, 2018	Dec. 31, 2017
Net assets acquired:
Goodwill		$ 62,840,000	$ 3,918,000
Scottdale Bank and Trust Company [Member]
Business Acquisition [Line Items]
Total purchase price (consideration paid)	$ 66,973,000
Net assets acquired:
Cash and cash equivalents	67,817,000
Investment securities	114,039,000
Restricted stock	97,000
Loans	70,769,000
Core deposit intangible	4,940,000
Premises and equipment	1,496,000
Foreclosed assets	11,000
Deferred income taxes	1,050,000
Accrued interest receivable	989,000
Other assets	266,000
Deposits	(209,981,000)
Accrued interest payable	(16,000)
Other liabilities	(3,682,000)
Total net assets acquired	47,795,000
Goodwill	$ 19,178,000

Acquisition of The Scottdale _4

Acquisition of The Scottdale Bank and Trust Company (Fair Value Adjustments) (Details) - Scottdale Bank and Trust Company [Member]	Jan. 08, 2018USD ($)
Business Acquisition [Line Items]
Gross amortized cost basis at January 8, 2018	$ 71,809,000
Market rate adjustment	601,000
Credit fair value adjustment on pools of homogeneous loans	(995,000)
Credit fair value adjustment on impaired loans	(646,000)
Fair value of purchased loans at January 8, 2018	$ 70,769,000

Acquisition of The Scottdale _5

Acquisition of The Scottdale Bank and Trust Company (Fair Value of Loans Acquired) (Details) - Scottdale Bank and Trust Company [Member] $ in Thousands	Jan. 08, 2018USD ($)
Business Acquisition [Line Items]
Contractually required principal and interest at acquisition	$ 2,586
Contractual cash flows not expected to be collected (nonaccretable discount)	(1,010)
Expected cash flows at acquisition	1,576
Interest component of expected cash flows (accretable discount)	(305)
Fair value of acquired loans	$ 1,271

Acquisition of The Scottdale _6

Acquisition of The Scottdale Bank and Trust Company (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net interest income after loan loss provision	$ 17,456	$ 15,811	$ 11,414	$ 10,753	$ 9,387	$ 9,516	$ 9,310	$ 9,050	$ 55,434	$ 37,263	$ 32,975
Noninterest income	2,091	2,165	1,559	1,647	1,331	1,564	1,362	1,436	7,462	5,707	5,946
Noninterest expense	$ 13,982	$ 15,264	$ 9,742	$ 11,183	$ 8,047	$ 7,960	$ 7,558	$ 7,802	50,171	31,381	$ 28,840
Scottdale Bank and Trust Company [Member]
Business Acquisition [Line Items]
Net interest income after loan loss provision									55,434	43,371
Noninterest income									7,462	6,094
Noninterest expense									48,867	38,403
Net income									$ 11,736	$ 8,075
Net income per common share									$ 1.64	$ 1.32

Acquisition of First Priority F

Acquisition of First Priority Financial Corp. (Narrative) (Details) - USD ($)	Jul. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 08, 2018
Business Acquisition [Line Items]
Goodwill		$ 62,840,000	$ 3,918,000
Amortization expense		1,224,000	104,000	$ 126,000
First Priority Financial Corp. [Member]
Business Acquisition [Line Items]
Acquisition completion date	Jul. 31, 2018
Shares of acquirer ratio of common stock	34.81%
Per share price	$ 11.07
Common stock shares issued to acquire the company	2,320,800
Business combination, consideration transferred, equity interests issued and issuable	$ 76,122,000
Payments to acquire businesses gross	3,807,000
Business combination consideration transferred	79,929,000
Goodwill	39,744,000
Intangible assets acquired (finite lived)	2,832,000
Intangible assets acquired (indefinite lived)	$ 205,000
Intangible assets, amortization period	10 years
Core deposit intangible amortization expense related to acquisition for year one	$ 493,000
Core deposit intangible amortization expense related to acquisition for year two	442,000
Core deposit intangible amortization expense related to acquisition for year three	390,000
Core deposit intangible amortization expense related to acquisition for year four	339,000
Core deposit intangible amortization expense related to acquisition for year five	288,000
Core deposit intangible amortization expense related to acquisition for four years after year five	665,000
Fair value of purchased loans	$ 511,623,000				$ 511,623,000
Pro forma earnings		15,469,000	$ 9,170,000
Severance and retention bonus expenses		1,475,000
First Priority Financial Corp. [Member] | Excluded Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Pro forma earnings		3,486,000
Income tax nondeductible expenses		714,000
First Priority Financial Corp. [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Amortization expense		$ 215,000
First Priority Financial Corp. [Member] | Series D [Member]
Business Acquisition [Line Items]
Preferred Stock, Shares Issued	3,404
Preferred stock, value	$ 3,404,000
First Priority Financial Corp. [Member] | Stock Options [Member]
Business Acquisition [Line Items]
Payments to acquire businesses gross	3,801,000
First Priority Financial Corp. [Member] | Fractional Shares [Member]
Business Acquisition [Line Items]
Payments to acquire businesses gross	$ 6,000
First Priority Financial Corp. [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Per share price	$ 32.80
Business combination, consideration transferred, equity interests issued and issuable	$ 76,122,000

Acquisition of First Priority_2

Acquisition of First Priority Financial Corp. (Allocation of Purchase Price) (Details) - USD ($)	Jul. 31, 2018	Dec. 31, 2018	Jan. 08, 2018	Dec. 31, 2017
Assets acquired:
Goodwill		$ 62,840,000		$ 3,918,000
First Priority Financial Corp. [Member]
Assets acquired:
Cash and cash equivalents	$ 11,398,000
Investment securities	62,977,000
Restricted stock	2,237,000
Loans	511,623,000		$ 511,623,000
Goodwill	39,744,000
Core deposit intangible	2,832,000
Trade name intangible	205,000
Premises and equipment	1,147,000
Foreclosed assets	125,000
Deferred income taxes	3,140,000
Accrued interest receivable	2,293,000
Other assets	4,197,000
Total assets acquired	641,918,000
Liabilities assumed:
Deposits	504,946,000
Borrowings	49,939,000
Accrued interest payable	1,073,000
Other liabilities	2,627,000
Total liabilities assumed	558,585,000
Equity acquired:
Preferred stock	3,404,000
Total equity acquired and liabilities assumed	561,989,000
Consideration paid	79,929,000
Cash paid	3,807,000
Fair value of common stock issued	$ 76,122,000

Acquisition of First Priority_3

Acquisition of First Priority Financial Corp. (Preliminary Estimated Fair Value of Assets Acquired) (Details) - USD ($)	Jul. 31, 2018	Dec. 31, 2018	Jan. 08, 2018	Dec. 31, 2017
Net assets acquired:
Goodwill		$ 62,840,000		$ 3,918,000
First Priority Financial Corp. [Member]
Business Acquisition [Line Items]
Total purchase price (consideration paid)	$ 79,929,000
Net assets acquired:
Cash and cash equivalents	11,398,000
Investment securities	62,977,000
Restricted stock	2,237,000
Loans	511,623,000		$ 511,623,000
Core deposit intangible	2,832,000
Trade name intangible	205,000
Premises and equipment	1,147,000
Foreclosed assets	125,000
Deferred income taxes	3,140,000
Accrued interest receivable	2,293,000
Other assets	4,197,000
Deposits	(504,946,000)
Borrowings	(49,939,000)
Accrued interest payable	(1,073,000)
Other liabilities	(2,627,000)
Preferred stock	(3,404,000)
Total net assets acquired	40,185,000
Goodwill	$ 39,744,000

Acquisition of First Priority_4

Acquisition of First Priority Financial Corp. (Fair Value Adjustments) (Details) - First Priority Financial Corp. [Member] - USD ($)	Jan. 08, 2018	Jul. 31, 2018
Business Acquisition [Line Items]
Gross amortized cost basis at January 8, 2018	$ 521,644,000
Market rate adjustment	(3,023,000)
Credit fair value adjustment on pools of homogeneous loans	(6,742,000)
Credit fair value adjustment on impaired loans	(256,000)
Fair value of purchased loans at January 8, 2018	$ 511,623,000	$ 511,623,000

Acquisition of First Priority_5

Acquisition of First Priority Financial Corp. (Fair Value of Loans Acquired) (Details) - First Priority Financial Corp. [Member] $ in Thousands	Jul. 31, 2018USD ($)
Business Acquisition [Line Items]
Contractually required principal and interest at acquisition	$ 1,855
Contractual cash flows not expected to be collected (nonaccretable discount)	(858)
Expected cash flows at acquisition	997
Interest component of expected cash flows (accretable discount)	(125)
Fair value of acquired loans	$ 872

Acquisition of First Priority_6

Acquisition of First Priority Financial Corp. (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net interest income after loan loss provision	$ 17,456	$ 15,811	$ 11,414	$ 10,753	$ 9,387	$ 9,516	$ 9,310	$ 9,050	$ 55,434	$ 37,263	$ 32,975
Noninterest income	2,091	2,165	1,559	1,647	1,331	1,564	1,362	1,436	7,462	5,707	5,946
Noninterest expense	$ 13,982	$ 15,264	$ 9,742	$ 11,183	$ 8,047	$ 7,960	$ 7,558	$ 7,802	50,171	31,381	$ 28,840
First Priority Financial Corp. [Member]
Business Acquisition [Line Items]
Net interest income after loan loss provision									66,370	55,082
Noninterest income									7,845	6,748
Noninterest expense									55,689	49,268
Net income									$ 15,469	$ 9,170
Net income per common share									$ 1.84	$ 1.40

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive (Loss) Income (Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Unrealized (Loss) Gain on Securities	$ (3,242)	$ (2,159)
Defined Benefit Plan Liability	864	85
Accumulated Other Comprehensive (Loss) Income	$ (2,378)	$ (2,074)

Investment Securities (Unrealiz

Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	$ 116,027,000	$ 95,648,000
Available-for-sale debt securities, Unrealized Gains	21,000	14,000
Available-for-sale debt securities, Unrealized Losses	4,125,000	2,703,000
Available for sale debt securities, Fair Value	111,923,000	92,959,000
Held-to-maturity debt securities, Amortized Cost	168,370,000	101,356,000
Held-to-maturity debt securities, Unrealized Gains	517,000	41,000
Held-to-maturity debt securities, Unrealized Losses	2,305,000	914,000
Held-to-maturity debt securities, Fair Value	166,582,000	100,483,000
Available-for-sale securities and Held-to-maturity debt securities, Amortized Cost	284,397,000	197,554,000
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Gains	538,000	55,000
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Losses	6,430,000	3,661,000
Available-for-sale securities and Held-to-maturity debt securities, Fair Value	278,505,000	193,948,000
Available-for-sale equity securities, Amortized Cost		550,000
Available-for-sale equity securities, Unrealized Losses		44,000
Available for sale equity securities, Fair Value	492,000	506,000
Available-for-sale securities and Held-to-maturity debt securities, Fair Value	278,505,000	193,948,000
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	43,270,000	40,125,000
Available-for-sale debt securities, Unrealized Gains	10,000
Available-for-sale debt securities, Unrealized Losses	1,708,000	1,395,000
Available for sale debt securities, Fair Value	41,572,000	38,730,000
Held-to-maturity debt securities, Amortized Cost	16,985,000	10,984,000
Held-to-maturity debt securities, Unrealized Gains	14,000
Held-to-maturity debt securities, Unrealized Losses	143,000	90,000
Held-to-maturity debt securities, Fair Value	16,856,000	10,894,000
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	39,865,000	26,398,000
Available-for-sale debt securities, Unrealized Gains		2,000
Available-for-sale debt securities, Unrealized Losses	1,016,000	569,000
Available for sale debt securities, Fair Value	38,849,000	25,831,000
Held-to-maturity debt securities, Amortized Cost	65,812,000	53,472,000
Held-to-maturity debt securities, Unrealized Gains	46,000
Held-to-maturity debt securities, Unrealized Losses	1,310,000	523,000
Held-to-maturity debt securities, Fair Value	64,548,000	52,949,000
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	30,642,000	27,775,000
Available-for-sale debt securities, Unrealized Gains	11,000	7,000
Available-for-sale debt securities, Unrealized Losses	1,397,000	739,000
Available for sale debt securities, Fair Value	29,256,000	27,043,000
Held-to-maturity debt securities, Amortized Cost	84,034,000	36,900,000
Held-to-maturity debt securities, Unrealized Gains	457,000	41,000
Held-to-maturity debt securities, Unrealized Losses	842,000	301,000
Held-to-maturity debt securities, Fair Value	83,649,000	36,640,000
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale debt securities, Amortized Cost	2,250,000	1,350,000
Available-for-sale debt securities, Unrealized Gains		5,000
Available-for-sale debt securities, Unrealized Losses	4,000
Available for sale debt securities, Fair Value	2,246,000	1,355,000
Held-to-maturity debt securities, Amortized Cost	1,539,000
Held-to-maturity debt securities, Unrealized Losses	10,000
Held-to-maturity debt securities, Fair Value	1,529,000
Equity Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale equity securities, Amortized Cost		550,000
Available-for-sale equity securities, Unrealized Losses		44,000
Available for sale equity securities, Fair Value	$ 492,000	$ 506,000

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Equity securities, fair value	$ 492,000	$ 506,000
Equity securities sold	0
Available-for-sale Securities Pledged as Collateral	$ 214,239,000	$ 141,465,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List]	us-gaap:CollateralPledgedMember	us-gaap:CollateralPledgedMember
Equity Securities [Member]
Schedule of Investments [Line Items]
Equity securities, fair value	$ 492,000	$ 506,000
Loss related to the change in fair value of equity securities	$ 15,000
Accumulated Other Comprehensive Loss [Member] | Equity Securities [Member]
Schedule of Investments [Line Items]
Net unrealized gains recongized		$ 44,000

Investment Securities (Schedule

Investment Securities (Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)security
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	16	18
Available-for-sale securities, Less than 12 Months: Fair Value	$ 20,487	$ 16,419
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 190	$ 361
Available-for-sale securities, 12 Months or More: Number of Securities | security	91	74
Available-for-sale securities, 12 Months or More: Fair Value	$ 84,999	$ 73,816
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 3,935	$ 2,386
Available-for-sale securities, Total: Number of Securities | security	107	92
Available-for-sale securities, Total: Fair Value	$ 105,486	$ 90,235
Available-for-sale securities, Total: Unrealized Losses	$ 4,125	$ 2,747
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	38	0
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 31,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 210
Held-to-maturity securities, 12 Months or More: Number of Securities | security	115	116
Held-to-maturity securities, 12 Months or More: Fair Value	$ 80,743	$ 93,819
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 2,095	$ 914
Held-to-maturity securities, Total: Number of Securities | security	153	116
Held-to-maturity securities, Total: Fair Value	$ 111,743	$ 93,819
Held-to-maturity securities, Total: Unrealized Losses	$ 2,305	$ 914
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security	54	18
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value	$ 51,487	$ 16,419
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 400	$ 361
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security	206	190
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Fair Value	$ 165,742	$ 167,635
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 6,030	$ 3,300
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security	260	208
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value	$ 217,229	$ 184,054
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses	$ 6,430	$ 3,661
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	0	3
Available-for-sale securities, Less than 12 Months: Fair Value		$ 5,008
Available-for-sale securities, Less than 12 Months: Unrealized Losses		$ 184
Available-for-sale securities, 12 Months or More: Number of Securities | security	21	18
Available-for-sale securities, 12 Months or More: Fair Value	$ 38,386	$ 33,722
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 1,708	$ 1,211
Available-for-sale securities, Total: Number of Securities | security	21	21
Available-for-sale securities, Total: Fair Value	$ 38,386	$ 38,730
Available-for-sale securities, Total: Unrealized Losses	$ 1,708	$ 1,395
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	1	0
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 1,985
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 10
Held-to-maturity securities, 12 Months or More: Number of Securities | security	3	4
Held-to-maturity securities, 12 Months or More: Fair Value	$ 8,852	$ 10,894
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 133	$ 90
Held-to-maturity securities, Total: Number of Securities | security	4	4
Held-to-maturity securities, Total: Fair Value	$ 10,837	$ 10,894
Held-to-maturity securities, Total: Unrealized Losses	$ 143	$ 90
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	11	4
Available-for-sale securities, Less than 12 Months: Fair Value	$ 16,740	$ 5,267
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 163	$ 75
Available-for-sale securities, 12 Months or More: Number of Securities | security	19	15
Available-for-sale securities, 12 Months or More: Fair Value	$ 22,093	$ 20,497
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 853	$ 494
Available-for-sale securities, Total: Number of Securities | security	30	19
Available-for-sale securities, Total: Fair Value	$ 38,833	$ 25,764
Available-for-sale securities, Total: Unrealized Losses	$ 1,016	$ 569
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	10	0
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 16,165
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 79
Held-to-maturity securities, 12 Months or More: Number of Securities | security	35	35
Held-to-maturity securities, 12 Months or More: Fair Value	$ 42,431	$ 52,949
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 1,231	$ 523
Held-to-maturity securities, Total: Number of Securities | security	45	35
Held-to-maturity securities, Total: Fair Value	$ 58,596	$ 52,949
Held-to-maturity securities, Total: Unrealized Losses	$ 1,310	$ 523
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	3	11
Available-for-sale securities, Less than 12 Months: Fair Value	$ 1,751	$ 6,144
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 23	$ 102
Available-for-sale securities, 12 Months or More: Number of Securities | security	51	40
Available-for-sale securities, 12 Months or More: Fair Value	$ 24,520	$ 19,091
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 1,374	$ 637
Available-for-sale securities, Total: Number of Securities | security	54	51
Available-for-sale securities, Total: Fair Value	$ 26,271	$ 25,235
Available-for-sale securities, Total: Unrealized Losses	$ 1,397	$ 739
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	26	0
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 11,321
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 111
Held-to-maturity securities, 12 Months or More: Number of Securities | security	77	77
Held-to-maturity securities, 12 Months or More: Fair Value	$ 29,460	$ 29,976
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 731	$ 301
Held-to-maturity securities, Total: Number of Securities | security	103	77
Held-to-maturity securities, Total: Fair Value	$ 40,781	$ 29,976
Held-to-maturity securities, Total: Unrealized Losses	$ 842	$ 301
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	2	0
Available-for-sale securities, Less than 12 Months: Fair Value	$ 1,996
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 4
Available-for-sale securities, 12 Months or More: Number of Securities | security	0	0
Available-for-sale securities, Total: Number of Securities | security	2	0
Available-for-sale securities, Total: Fair Value	$ 1,996
Available-for-sale securities, Total: Unrealized Losses	$ 4
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	1
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 1,529
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 10
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0
Held-to-maturity securities, Total: Number of Securities | security	1
Held-to-maturity securities, Total: Fair Value	$ 1,529
Held-to-maturity securities, Total: Unrealized Losses	$ 10
Equity Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security		0
Available-for-sale securities, 12 Months or More: Number of Securities | security		1
Available-for-sale securities, 12 Months or More: Fair Value		$ 506
Available-for-sale securities, 12 Months or More: Unrealized Losses		$ 44
Available-for-sale securities, Total: Number of Securities | security		1
Available-for-sale securities, Total: Fair Value		$ 506
Available-for-sale securities, Total: Unrealized Losses		$ 44

Investment Securities (Schedu_2

Investment Securities (Schedule of Gross Realized Gains (Losses) on Sales of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Securities Financing Transactions Disclosures [Abstract]
Realized gains	$ 150	$ 246	$ 1,927
Realized losses	(13)	(204)	(881)
Net gains	$ 137	$ 42	$ 1,046

Investment Securities (Investme

Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Available for sale Securities, Amortized Cost, Due after 1 year but within 5 years	$ 25,285
Available for sale Securities, Amortized Cost, Due after 5 years but within 10 years	43,070
Available for sale Securities, Amortized Cost, Due after 10 years	7,807
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Total	76,162
Available-for-sale debt securities, Amortized Cost	116,027	$ 95,648
Available for sale Securities, Fair Value, Due after 1 year but within 5 years	24,732
Available for sale Securities, Fair Value, Due after 5 years but within 10 years	41,027
Available for sale Securities, Fair Value, Due after 10 years	7,315
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value, Total	73,074
Available for sale Securities, Fair Value	111,923	92,959
Held-to-maturity, Due in 1 year or less, Amortized Cost	1,086
Held-to-maturity, Due after 1 year through 5 years, Amortized Cost	18,745
Held-to-maturity, Due after 5 years through 10 years, Amortized Cost	82,727
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	102,558
Held-to-maturity debt securities, Amortized Cost	168,370	101,356
Held-to-maturity, Due in 1 year or less, Fair Value	1,087
Held-to-maturity, Due after 1 year through 5, Fair Value	18,597
Held-to-maturity, Due after 5 years through 10 years, Fair Value	82,350
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value	102,034
Held-to-maturity, Fair Value	166,582	$ 100,483
Mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Available for sale Securities without a Single Maturity Date, Amortized Cost	39,865
Available for sale securities without a Single Maturity Date, Fair Value	38,849
Held-to-maturity without Single Maturity Date, Amortized Cost	65,812
Held-to-maturity without Single Maturity Date, Fair Value	$ 64,548

Loans and Allowance for Loan _3

Loans and Allowance for Loan and Lease Losses (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)Loan	Dec. 31, 2017USD ($)Loan	Dec. 31, 2016USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable deferred fees and costs	$ 475,000	$ 464,000
Loans and leases receivable, impaired, interest lost on nonaccrual loans	536,000	780,000	$ 778,000
Loans and leases receivable, impaired, commitment to lend	0
Financing receivable, modifications, recorded investment	$ 7,020,000	$ 9,571,000
Number of troubled debt restructured loans | Loan	0	0
Charge-offs associated with troubled debt restructured loans		$ 66,000
Loans to certain executive officers, directors, and their related interests	$ 17,843,000	15,163,000
Loans to certain executive officers, directors, and their related interests, new loans and advances	6,458,000
Loans to certain executive officers, directors, and their related interests, Repayments	4,360,000
First Priority Financial Corp. [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans to certain executive officers, directors, and their related interests, new loans and advances	582,000
Accruing [Member] | Four Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	517,000	544,000
Nonaccruing [Member] | Fifteen Loans With Seven Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	6,503,000	9,027,000
Nonaccruing [Member] | Two Large Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	5,463,000	7,284,000
Residential Mortgage [Member] | Residential Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	516,000	540,000
Residential Mortgage [Member] | Residential Portfolio [Member] | Accruing [Member] | Three Unrelated Borrowers [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	516,000	540,000
Home Equity Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	1,000	4,000
Home Equity Loan [Member] | Accruing [Member] | Other Borrower [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, recorded investment	$ 1,000	$ 4,000

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	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	$ 1,624,067	$ 910,404	$ 813,924
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	70,096	41,893	37,608
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	1,600,169	892,622
Pass [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	70,004	41,479
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	5,348	2,332
Special Mention [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount		105
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	18,550	15,450
Substandard [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	92	309
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	286,518	188,033	172,518
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	861,369	515,012	446,524
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	142,173	62,336	54,376
Commercial Portfolio [Member] | Lease Financing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	53	229	425
Commercial Portfolio [Member] | Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	276,690	182,168
Commercial Portfolio [Member] | Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	850,150	505,397
Commercial Portfolio [Member] | Pass [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	141,806	61,667
Commercial Portfolio [Member] | Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,769	453
Commercial Portfolio [Member] | Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,432	1,435
Commercial Portfolio [Member] | Special Mention [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount		182
Commercial Portfolio [Member] | Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	7,059	5,412
Commercial Portfolio [Member] | Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	8,787	8,180
Commercial Portfolio [Member] | Substandard [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	367	487
Finance Leases Portfolio [Member] | Lease Financing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	53	229
Finance Leases Portfolio [Member] | Pass [Member] | Lease Financing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	53	229
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	253,543	99,033	99,457
Residential Portfolio [Member] | Pass [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	251,151	97,814
Residential Portfolio [Member] | Special Mention [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	147	157
Residential Portfolio [Member] | Substandard [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	2,245	1,062
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	10,315	3,868	$ 3,016
Consumer Portfolio [Member] | Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivable, gross, carrying amount	$ 10,315	$ 3,868

Loans and Allowance for Loan _5

Loans and Allowance for Loan and Lease Losses (Impaired Loans by Loan Portfolio Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	$ 30	$ 260
Impaired Loans with No Allowance: Unpaid Principal Balance	106	295
Impaired Loans: Total Recorded Investment	34	260
Impaired Loans: Total Unpaid Principal Balance	110	295
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	4
Impaired Loans with No Allowance: Unpaid Principal Balance	4
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Unpaid Principal Balance		13
Impaired Loans with Allowance: Recorded Investment	4,527	4,434
Impaired Loans with Allowance: Unpaid Principal Balance	4,635	4,460
Impaired Loans with Allowance: Related Allowance	500	136
Impaired Loans: Total Recorded Investment	4,555	4,434
Impaired Loans: Total Unpaid Principal Balance	4,663	4,473
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	28
Impaired Loans with No Allowance: Unpaid Principal Balance	28
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	2,007	3,424
Impaired Loans with No Allowance: Unpaid Principal Balance	2,276	4,056
Impaired Loans with Allowance: Recorded Investment	721	1,423
Impaired Loans with Allowance: Unpaid Principal Balance	721	1,589
Impaired Loans with Allowance: Related Allowance	204	293
Impaired Loans: Total Recorded Investment	4,291	5,402
Impaired Loans: Total Unpaid Principal Balance	4,560	6,200
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	1,563	555
Impaired Loans with No Allowance: Unpaid Principal Balance	1,563	555
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	367	487
Impaired Loans with Allowance: Unpaid Principal Balance	370	492
Impaired Loans with Allowance: Related Allowance	38	100
Impaired Loans: Total Recorded Investment	367	487
Impaired Loans: Total Unpaid Principal Balance	370	492
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	657	760
Impaired Loans with No Allowance: Unpaid Principal Balance	811	877
Impaired Loans: Total Recorded Investment	2,019	1,066
Impaired Loans: Total Unpaid Principal Balance	1,865	1,183
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	1,208	306
Impaired Loans with No Allowance: Unpaid Principal Balance	$ 1,208	$ 306

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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	$ 101	$ 218	$ 75
Impaired Loans with No Allowance: Interest Income Recognized		6
Impaired Loans with Allowance: Average Recorded Investment			32
Impaired Financing Receivable, Average Recorded Investment, Total	102	218	107
Impaired Financing Receivable, Interest Income Recognized, Total		6
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	1
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment		15	9
Impaired Loans with Allowance: Average Recorded Investment	4,437	1,779	59
Impaired Financing Receivable, Average Recorded Investment, Total	4,460	1,794	68
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	23
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	3,048	1,915	820
Impaired Loans with No Allowance: Interest Income Recognized	3	279
Impaired Loans with Allowance: Average Recorded Investment	541	1,446	2,177
Impaired Financing Receivable, Average Recorded Investment, Total	5,003	4,012	3,807
Impaired Financing Receivable, Interest Income Recognized, Total	26	389	164
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	1,414	651	810
Impaired Loans with No Allowance: Interest Income Recognized	23	110	164
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment		164	124
Impaired Loans with Allowance: Average Recorded Investment	367	488	48
Impaired Financing Receivable, Average Recorded Investment, Total	367	652	172
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	754	890	821
Impaired Loans with No Allowance: Interest Income Recognized	29	18	21
Impaired Loans with Allowance: Average Recorded Investment			14
Impaired Financing Receivable, Average Recorded Investment, Total	1,586	1,222	1,213
Impaired Financing Receivable, Interest Income Recognized, Total	29	18	25
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	$ 832	$ 332	378
Impaired Loans with No Allowance: Interest Income Recognized			$ 4

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	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 10,749	$ 10,575
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	34	260
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	4,555	4,434
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	4,291	4,902
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	367	487
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,502	$ 492

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	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 9,651	$ 10,749
Financing Receivable, Recorded Investment, Current	1,614,416	899,655
Total Loans	1,624,067	910,404	$ 813,924
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,803	861	1,231
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,457	5,306
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	89	612
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,105	4,831
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		402
Financing Receivable, Recorded Investment, Current		41,491
Total Loans	70,096	41,893	37,608
Home Equity [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	213
Financing Receivable, Recorded Investment, Current	69,879
Total Loans	70,092
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4
Total Loans	4
Home Equity [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		54
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	166
Home Equity [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		98
Home Equity [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	22
Home Equity [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		250
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	25
Home Equity [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	4
Commercial Portfolio [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	28
Total Loans	28
Commercial Portfolio [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	23
Commercial Portfolio [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	5
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		4,455
Financing Receivable, Recorded Investment, Current		183,578
Total Loans	286,518	188,033	172,518
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,544
Financing Receivable, Recorded Investment, Current	281,946
Total Loans	286,490
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	28
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		4,439
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		16
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	4,527
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	861,369	515,012	446,524
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,143	3,669
Financing Receivable, Recorded Investment, Current	858,663	510,788
Total Loans	859,806	514,457
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,563	555
Total Loans	1,563	555	842
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	685
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	29	500
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	458	3,669
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	1,534	55
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	367	487
Financing Receivable, Recorded Investment, Current	141,806	61,849
Total Loans	142,173	62,336	54,376
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	367	487
Commercial Portfolio [Member] | Lease Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	53	229
Total Loans	53	229	425
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	253,543	99,033	99,457
Residential Portfolio [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	738	954
Financing Receivable, Recorded Investment, Current	251,597	97,773
Total Loans	252,335	98,727
Residential Portfolio [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	989	224
Financing Receivable, Recorded Investment, Current	219	82
Total Loans	1,208	306	389
Residential Portfolio [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	461	310
Residential Portfolio [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	19
Residential Portfolio [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		467
Residential Portfolio [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	57	31
Residential Portfolio [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Mortgage [Member] | Excluded Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	277	177
Residential Portfolio [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	913	193
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	62	3
Financing Receivable, Recorded Investment, Current	10,253	3,865
Total Loans	10,315	3,868	$ 3,016
Consumer Portfolio [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	57	$ 3
Consumer Portfolio [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 5

Loans and Allowance for Loan _9

Loans and Allowance for Loan and Lease Losses (Allowance For Loan Losses And Recorded Investment In Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			$ 7,606			$ 7,183	$ 7,606	$ 7,183	$ 6,168
Charge-offs							(528)	(497)	(1,107)
Recoveries							819	595	252
Provisions	$ 275	$ 100	125	$ 100	$ 100	125	500	325	1,870
Allowance for Loan Losses, Ending balance	8,397			7,606			8,397	7,606	7,183
Allowance for loan losses: Ending balance: individually evaluated for impairment	742			529			742	529	858
Allowance for loan losses: Ending balance: collectively evaluated for impairment	7,655			7,077			7,655	7,077	6,325
Loans receivables, Ending balance	1,624,067			910,404			1,624,067	910,404	813,924
Loans receivables: Ending balance: individually evaluated for impairment	8,463			10,788			8,463	10,788	5,222
Loans Receivable: Ending balance: collectively evaluated for impairment	1,612,801			898,755			1,612,801	898,755	807,471
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	2,803			861			2,803	861	1,231
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			423			379	423	379	317
Charge-offs							(185)	(20)	(25)
Recoveries							1	5
Provisions							289	59	87
Allowance for Loan Losses, Ending balance	528			423			528	423	379
Allowance for loan losses: Ending balance: individually evaluated for impairment									1
Allowance for loan losses: Ending balance: collectively evaluated for impairment	528			423			528	423	378
Loans receivables, Ending balance	70,096			41,893			70,096	41,893	37,608
Loans receivables: Ending balance: individually evaluated for impairment	30			260			30	260	140
Loans Receivable: Ending balance: collectively evaluated for impairment	70,062			41,633			70,062	41,633	37,468
Home Equity [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	4						4
Commercial Portfolio [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivables, Ending balance	28						28
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			1,795			1,580	1,795	1,580	1,393
Charge-offs							(142)	(25)	(820)
Recoveries							1	26	4
Provisions							737	214	1,003
Allowance for Loan Losses, Ending balance	2,391			1,795			2,391	1,795	1,580
Allowance for loan losses: Ending balance: individually evaluated for impairment	500			136			500	136	6
Allowance for loan losses: Ending balance: collectively evaluated for impairment	1,891			1,659			1,891	1,659	1,574
Loans receivables, Ending balance	286,518			188,033			286,518	188,033	172,518
Loans receivables: Ending balance: individually evaluated for impairment	4,527			4,434			4,527	4,434	60
Loans Receivable: Ending balance: collectively evaluated for impairment	281,963			183,599			281,963	183,599	172,458
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	28						28
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			4,435			4,323	4,435	4,323	3,552
Charge-offs							(64)	(322)	(216)
Recoveries							808	553	211
Provisions							(476)	(119)	776
Allowance for Loan Losses, Ending balance	4,703			4,435			4,703	4,435	4,323
Allowance for loan losses: Ending balance: individually evaluated for impairment	204			293			204	293	711
Allowance for loan losses: Ending balance: collectively evaluated for impairment	4,499			4,142			4,499	4,142	3,612
Loans receivables, Ending balance	861,369			515,012			861,369	515,012	446,524
Loans receivables: Ending balance: individually evaluated for impairment	2,728			4,847			2,728	4,847	3,246
Loans Receivable: Ending balance: collectively evaluated for impairment	857,078			509,610			857,078	509,610	442,436
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	1,563			555			1,563	555	842
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			178			144	178	144	153
Charge-offs							(40)
Provisions							(63)	34	(9)
Allowance for Loan Losses, Ending balance	75			178			75	178	144
Allowance for loan losses: Ending balance: individually evaluated for impairment	38			100			38	100	72
Allowance for loan losses: Ending balance: collectively evaluated for impairment	37			78			37	78	72
Loans receivables, Ending balance	142,173			62,336			142,173	62,336	54,376
Loans receivables: Ending balance: individually evaluated for impairment	367			487			367	487	860
Loans Receivable: Ending balance: collectively evaluated for impairment	141,806			61,849			141,806	61,849	53,516
Commercial Portfolio [Member] | Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance						1		1	1
Provisions								(1)
Allowance for Loan Losses, Ending balance									1
Allowance for loan losses: Ending balance: collectively evaluated for impairment									1
Loans receivables, Ending balance	53			229			53	229	425
Loans Receivable: Ending balance: collectively evaluated for impairment	53			229			53	229	425
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			428			541	428	541	534
Charge-offs							(60)	(102)	(4)
Recoveries								4	26
Provisions							85	(15)	(15)
Allowance for Loan Losses, Ending balance	453			428			453	428	541
Allowance for loan losses: Ending balance: individually evaluated for impairment									68
Allowance for loan losses: Ending balance: collectively evaluated for impairment	453			428			453	428	473
Loans receivables, Ending balance	253,543			99,033			253,543	99,033	99,457
Loans receivables: Ending balance: individually evaluated for impairment	811			760			811	760	916
Loans Receivable: Ending balance: collectively evaluated for impairment	251,524			97,967			251,524	97,967	98,152
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	1,208			306			1,208	306	389
Consumer Portfolio [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			3			3	3	3	12
Charge-offs							(37)	(28)	(42)
Recoveries							9	7	11
Provisions							32	21	22
Allowance for Loan Losses, Ending balance	7			3			7	3	3
Allowance for loan losses: Ending balance: collectively evaluated for impairment	7			3			7	3	3
Loans receivables, Ending balance	10,315			3,868			10,315	3,868	3,016
Loans Receivable: Ending balance: collectively evaluated for impairment	10,315			3,868			10,315	3,868	3,016
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, Beginning balance			$ 344			$ 212	344	212	206
Provisions							(104)	132	6
Allowance for Loan Losses, Ending balance	240			344			240	344	212
Allowance for loan losses: Ending balance: collectively evaluated for impairment	$ 240			$ 344			$ 240	$ 344	$ 212

Loans and Allowance for Loan_10

Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)Loancontract	Dec. 31, 2017USD ($)Loancontract	Dec. 31, 2016USD ($)contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 7,741,000	$ 10,536,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	7,990,000	10,730,000
Financing Receivable, Modifications, Recorded Investment	$ 7,020,000	$ 9,571,000
Financing Receivable, Modifications, Number of Contracts | Loan	0	0
Entity Loan Modification Program [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 270,000	$ 7,322,000	$ 1,002,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	270,000	7,610,000	982,000
Financing Receivable, Modifications, Recorded Investment	$ 266,000	$ 7,574,000	$ 982,000
Financing Receivable, Modifications, Number of Contracts | contract	1	10	3
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 14,000	$ 14,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	14,000	14,000
Financing Receivable, Modifications, Recorded Investment	1,000	4,000
Commercial Portfolio [Member] | Commercial and Industrial [Member] | Entity Loan Modification Program [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment		4,110,000	$ 934,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		4,460,000	914,000
Financing Receivable, Modifications, Recorded Investment		$ 4,434,000	$ 914,000
Financing Receivable, Modifications, Number of Contracts | contract		1	2
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	4,110,000	$ 4,110,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	4,460,000	4,460,000
Financing Receivable, Modifications, Recorded Investment	4,302,000	4,434,000
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	2,940,000	5,735,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,841,000	5,581,000
Financing Receivable, Modifications, Recorded Investment	2,201,000	4,593,000
Commercial Portfolio [Member] | Commercial Real Estate [Member] | Entity Loan Modification Program [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	270,000	3,212,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	270,000	3,150,000
Financing Receivable, Modifications, Recorded Investment	$ 266,000	$ 3,140,000
Financing Receivable, Modifications, Number of Contracts | contract	1	9
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 677,000	$ 677,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	675,000	675,000
Financing Receivable, Modifications, Recorded Investment	$ 516,000	$ 540,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Entity Loan Modification Program [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment			$ 68,000
Financing Receivable, Modifications, Post-Modification Recorded Investment			68,000
Financing Receivable, Modifications, Recorded Investment			$ 68,000
Financing Receivable, Modifications, Number of Contracts | contract			1

Loans and Allowance for Loan_11

Loans and Allowance for Loan and Lease Losses (Schedule of Accretion of Purchased Impaired Loan) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Accretable yield, beginning balance	$ 67
Acquisition of impaired loans	430
Accretable yield amortized to interest income	(188)
Accretable yield, ending balance	$ 309

Bank Premises and Equipment (Pr

Bank Premises and Equipment (Premises and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total cost	$ 37,078	$ 26,051
Less accumulated depreciation	(11,775)	(9,883)
Total bank premises and equipment	25,303	16,168
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	4,305	3,564
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total cost	19,490	8,632
Furniture, Fixtures, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	11,837	8,262
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	1,363	1,126
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 83	$ 4,467

Bank Premises and Equipment (Na

Bank Premises and Equipment (Narrative) (Details)	Jan. 20, 2017USD ($)Property	Dec. 31, 2018USD ($)Lease	Dec. 31, 2017USD ($)Administrative_Office	Dec. 31, 2016USD ($)Lease
Property, Plant and Equipment [Line Items]
Bank premises and equipment held for sale		$ 0	$ 0
Asset held for sale, description		As of December 31, 2016, assets held-for-sale consisted of three full service retail banking properties. These properties were transferred from land and buildings to assets held for sale during 2016 due to Mid Penn’s intent to sell them during January 2017.
Number of properties sale | Property	3
Proceeds from sale of three properties	$ 2,240,000		2,201,000
Gain from sale of three properties	$ 346,000	$ (71,000)	(14,000)	$ (142,000)
Depreciation		$ 2,395,000	$ 1,464,000	$ 1,658,000
Lease expiration date		Dec. 31, 2035
2019		$ 2,171,000
2020		1,970,000
2021		1,603,000
2022		1,464,000
2023		1,245,000
thereafter		$ 6,691,000
Harrisburg, PA [Member] | Commercial Building and Adjacent Lots [Member]
Property, Plant and Equipment [Line Items]
Number of administrative offices previously leased, replaced | Administrative_Office			2
Minimum [Member]
Property, Plant and Equipment [Line Items]
Length of lease	15 years
Sublease to Unrelated Party [Member]
Property, Plant and Equipment [Line Items]
Lease expiration date				Mar. 31, 2021
Number of operating lease with related parties | Lease				2
Operating Leases Related Party [Member]
Property, Plant and Equipment [Line Items]
Number of operating lease with related parties | Lease		3
Operating leases, rent expense, net		$ 320,000	$ 352,000	$ 348,000
2019		208,000
2020		214,000
2021		186,000
2022		175,000
2023		175,000
thereafter		$ 1,700,000
Second Sublease Agreement [Member] | Sublease to Unrelated Party [Member]
Property, Plant and Equipment [Line Items]
Sale and lease back of properties, description		Two of the properties are being leased back by Mid Penn for a period of at least 15 years, and the respective gains on the sales of those properties will be recognized over the life of the leases.
Lease agreement start date				Jul. 1, 2016
First Sublease Agreement [Member] | Sublease to Unrelated Party [Member]
Property, Plant and Equipment [Line Items]
Lease agreement start date				Apr. 1, 2016
Non Interest Expense [Member]
Property, Plant and Equipment [Line Items]
Asset held for sale, impairment charge on one of the properties				$ 142,000

Bank Premises and Equipment (Fu

Bank Premises and Equipment (Future Minimum Rental Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Property Plant And Equipment [Abstract]
2019 Lease obligation	$ 2,171
2020 Lease obligation	1,970
2021 Lease obligation	1,603
2022 Lease obligation	1,464
2023 Lease obligation	1,245
Lease obligation thereafter	6,691
Lease obligation	15,144
2019 Sublease rental income	81
2020 Sublease rental income	81
2021 Sublease rental income	20
Sublease rental income	182
2019 Net rental expense	2,090
2020 Net rental expense	1,889
2021 Net rental expense	1,583
2022 Net rental expense	1,464
2023 Net rental expense	1,245
Net rental thereafter	6,691
Net rental expense	$ 14,962

Bank Premises and Equipment (_2

Bank Premises and Equipment (Future Minimum Rental Payments) (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Rent expense in connection with leases	$ 1,433,000	$ 1,087,000	$ 716,000

Deposits (Narrative) (Details)

Deposits (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Time Deposits	$ 486,329,000	$ 201,623,000
Interest Expense, Time Deposits	4,906,000	2,570,000	$ 2,156,000
Brokered Deposits	110,218,000	19,447,000
Related Party Deposit Liabilities	27,399,000	20,262,000
Demand Deposit [Member]
Demand deposit overdrafts reclassified as loans	$ 356,000	$ 136,000

Deposits (Time Deposits By Matu

Deposits (Time Deposits By Maturity Date) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Time Deposits, Total	$ 486,329,000	$ 201,623,000
Time Deposits Less Than $250,000 [Member]
Maturing in 2019	199,257,000
Maturing in 2020	129,223,000
Maturing in 2021	42,965,000
Maturing in 2022	19,370,000
Maturing in 2023	10,566,000
Maturing thereafter	820,000
Time Deposits, Total	402,201,000
Time Deposits $250,000 or More [Member]
Maturing in 2019	70,445,000
Maturing in 2020	8,618,000
Maturing in 2021	1,796,000
Maturing in 2022	2,499,000
Maturing in 2023	770,000
Time Deposits, Total	$ 84,128,000

Short-term Borrowings (Narrativ

Short-term Borrowings (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Short term borrowings	$ 43,100,000	$ 34,611,000
Maturity of federal funds purchased from correspondent banks	one business day
Current borrowing available	$ 464,362,000
Real estate secured loans	507,462,000
Other Correspondent Banks [Member]
Short-term Debt [Line Items]
Short term borrowings	0	$ 0
Line of credit facility, remaining borrowing capacity	$ 15,000,000

Short-term Borrowings (Summary

Short-term Borrowings (Summary of Various Sources of Short-Term Borrowed Funds) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Balance at year end	$ 43,100,000	$ 34,611,000
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Balance at year end		$ 34,511,000
Weighted average rate at year end	0.00%	1.54%
Maximum month-end balance	$ 35,050,000	$ 41,610,000
Average daily balance during the year	$ 7,049,000	$ 7,961,000
Weighted average rate during the year	2.24%	1.39%
FHLB Short-Term Borrowings [Member]
Short-term Debt [Line Items]
Balance at year end	$ 43,100,000
Weighted average rate at year end	2.74%	0.00%
Maximum month-end balance	$ 43,100,000
Average daily balance during the year	$ 1,784,000
Weighted average rate during the year	2.74%	0.00%

Long-term Debt (Narrative) (Det

Long-term Debt (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Maturities Of Long Term Debt [Abstract]
Long-term debt outstanding	$ 48,024	$ 12,352
Real estate secured loans	507,462
Long-term debt, aggregate principal amounts due, 2019	12,234
Long-term debt, aggregate principal amounts due, 2020	34,246
Long-term debt, aggregate principal amounts due, 2021	258
Long-term debt, aggregate principal amounts due, 2022	271
Long-term debt, aggregate principal amounts due, 2023	284
Long-term debt, aggregate principal amounts due, thereafter	$ 835

Long-term Debt (Long-term Debt

Long-term Debt (Long-term Debt Outstanding by Due Date) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt outstanding	$ 48,128	$ 12,352
Less: fair value adjustment on debt assumed from acquisitions	104
Long-term debt	48,024	12,352
Due in July 2019 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 2,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	1.64%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2019-07
Due in December 2019 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 10,000	$ 10,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	1.87%	1.87%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2019-12	2019-12
Due in January 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	3.00%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-01
Due in February 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	3.01%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-02
Due in March 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	3.02%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-03
Due in April 2020 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,000
Federal Home Loan Bank, advances, branch of FHLB bank, interest rate	3.03%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-04
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%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-06
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%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-08
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%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-10
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%
Federal Home Loan Bank, advances, branch of FHLB bank, due date	2020-12
Due in August 2026 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding	$ 2,076	$ 2,295
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	$ 52	$ 57
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) - USD ($)	Dec. 19, 2017	Dec. 09, 2015	Jul. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Subordinated debt issuance					$ 10,000,000
Subordinated Notes Due 2025 [Member] | Subordinated Debt [Member]
Subordinated debt issuance		$ 7,500,000
Debt instrument, maturity date				Dec. 9, 2025
Debt instrumen term				The 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 times be less than 4.0%.
Debt instrument, interest rate, effective percentage		5.15%
Debt instrument, payment terms				Interest will be payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, and began on January 1, 2016.
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
Subordinated Notes Due 2025 [Member] | Subordinated Debt [Member] | WSJ Prime Rate [Member]
Debt instrument, basis spread on variable rate		0.50%
Subordinated Notes Due 2025 [Member] | Subordinated Debt [Member] | Maximum [Member] | WSJ Prime Rate [Member]
Debt instrument, interest rate, effective percentage		4.00%
Subordinated Notes Due 2025 [Member] | Subordinated Debt [Member] | First Priority Financial Corp. [Member]
Subordinated debt acquired			$ 9,500,000
Subordinated debt fair value premium			247,000
Debt instrument, issuance date				Nov. 13, 2015
Subordinated debt issuance			$ 9,500,000
Debt instrument, maturity date				Nov. 30, 2025
Debt instrument, interest rate, effective percentage			7.00%
Debt instrument non-callable period			5 years
Debt instrumen term				The 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 Notes Due 2025 [Member] | Subordinated Debt [Member] | First Priority Financial Corp. [Member] | Maximum [Member]
Debt instrument redemption price percentage			101.50%
Subordinated Notes Due 2025 [Member] | Subordinated Debt [Member] | First Priority Financial Corp. [Member] | Minimum [Member]
Debt instrument redemption price percentage			100.50%
Subordinated Notes Due 2028 [Member] | Subordinated Debt [Member]
Subordinated debt issuance	$ 10,000,000
Debt instrument, maturity date				Jan. 1, 2028
Debt instrumen term				The 2017 Notes will 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 times be less than 5.0%.
Debt instrument, interest rate, effective percentage	5.25%
Debt instrument, payment terms				Interest will be 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, 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
Subordinated Notes Due 2028 [Member] | Subordinated Debt [Member] | WSJ Prime Rate [Member]
Debt instrument, basis spread on variable rate	0.50%
Subordinated Notes Due 2028 [Member] | Subordinated Debt [Member] | Maximum [Member] | WSJ Prime Rate [Member]
Debt instrument, interest rate, effective percentage	5.00%

Fair Value Measurement (Assets

Fair Value Measurement (Assets Measured at Fair Value on Recurring Basis) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 111,923,000	$ 92,959,000
Available-for-sale equity securities	492,000	506,000
Available-for-sale securities	112,415,000	93,465,000
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	492,000	506,000
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	111,923,000	92,959,000
U.S. Treasury and U.S. government agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	41,572,000	38,730,000
U.S. Treasury and 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	41,572,000	38,730,000
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	38,849,000	25,831,000
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	38,849,000	25,831,000
State and political subdivision obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	29,256,000	27,043,000
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	29,256,000	27,043,000
Corporate debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	2,246,000	1,355,000
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	2,246,000	1,355,000
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity securities	492,000	506,000
Equity Securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale equity securities	$ 492,000	$ 506,000

Fair Value Measurement (Fair Va

Fair Value Measurement (Fair Value Measurements, Nonrecurring) (Details) - Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 4,935	$ 6,090
Foreclosed Assets Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	581
Level 3 [Member] | Impaired Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	4,935	$ 6,090
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	$ 581

Fair Value Measurement (Fair _2

Fair Value Measurement (Fair Value Inputs, Assets, Quantitative Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
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	$ 4,935	$ 6,090
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	$ 4,935	$ 6,090
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	$ 581
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	$ 581
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	26.00%	6.00%
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	17.00%	0.00%
Maximum [Member] | Discount Rate [Member] | Appraisal of Collateral [Member] | Impaired Loan [Member] | Unobservable Input - Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	100.00%	51.00%
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	17.00%	0.00%
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	40.00%	28.00%
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	17.00%	0.00%

Fair Value Measurement (Fair _3

Fair Value Measurement (Fair Value, by Balance Sheet Grouping) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale investment securities	$ 111,923	$ 93,465
Held to maturity investment securities	166,582	100,483
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	40,065	23,514
Available for sale investment securities	111,923	93,465
Held to maturity investment securities	168,370	101,356
Loans held for sale	1,702	1,040
Equity securities	492	506
Net loans and leases	1,615,670	902,798
Restricted investment in bank stocks	6,646	4,384
Accrued interest receivable	8,244	4,564
Mortgage servicing rights	101	126
Deposits	1,726,026	1,023,568
Short-term borrowings	43,100	34,611
Long-term debt	48,024	12,352
Subordinated debt	27,082	17,338
Accrued interest payable	2,262	645
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	40,065	23,514
Available for sale investment securities	111,923	93,465
Held to maturity investment securities	166,582	100,483
Loans held for sale	1,702	1,040
Equity securities	492	506
Net loans and leases	1,622,287	917,081
Restricted investment in bank stocks	6,646	4,384
Accrued interest receivable	8,244	4,564
Mortgage servicing rights	101	126
Deposits	1,725,674	1,026,830
Short-term borrowings	43,100	34,611
Long-term debt	44,585	11,692
Subordinated debt	24,881	17,358
Accrued interest payable	$ 2,262	$ 645

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity investment securities	$ 166,582	$ 100,483
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity investment securities	166,582	100,483
Deposits	1,725,674	1,026,830
Long-term debt	44,585	11,692
Subordinated debt	24,881	17,358
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	1,622,287	917,081
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity investment securities	168,370	101,356
Net loans and leases	1,615,670	902,798
Deposits	1,726,026	1,023,568
Long-term debt	48,024	12,352
Subordinated debt	27,082	17,338
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held to maturity investment securities	166,582	100,483
Net loans and leases	1,622,287	917,081
Deposits	1,725,674	1,026,830
Long-term debt	44,585	11,692
Subordinated debt	$ 24,881	$ 17,358

Postretirement Benefit Plans (N

Postretirement Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Settlement gains recognized	$ 737,000
Postretirement Life Insurance [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, minimum service period requirement	20 years	10 years
Defined benefit plan, minimum retirement age	55 years
Defined benefit plan, benefit description, until age 65	The insurance amount will be $50,000 until age 65.
Life insurance coverage amount until age 65	$ 50,000
Defined benefit plan, benefit description, after age 65	After age 65, the insurance amount will decrease by $5,000 per year until age 74.
Decrease in coverage amount after age 65	$ 5,000
Life insurance coverage amount	$ 5,000
Defined Benefit Postretirement Health and Life Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, minimum service period requirement	20 years
Defined benefit plan, minimum retirement age	55 years
Percentage increase in postretirement benefit health insurance reimbursable premium	36.79%
Defined benefit plan, coverage period	5 years
Defined Benefit Postretirement Health and Life Benefit Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefit health insurance reimbursable premium	$ 5,000
Post-Retirement Health Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, minimum service period requirement	20 years
Defined benefit plan, coverage period	5 years
Defined benefit plan, minimum retirement age	Employees who had achieved ten years of service as of January 1, 2008 and subsequently retire after at least 20 years of service are eligible for reimbursement of major medical insurance premiums up to $5,000, if the employee has not yet reached age 65.
Post-Retirement Health Benefit Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefit health insurance reimbursable premium	$ 5,000
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation	475,000	$ 508,000
Defined benefit plan, amount to be amortized from accumulated other comprehensive income (loss) next fiscal year	25,000
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation	1,100,000	1,116,000
Defined benefit plan, amount to be amortized from accumulated other comprehensive income (loss) next fiscal year	0
Unrecognized prior service cost credit generated by adoption of plan		274,000
Recognized prior service cost credit and fully amortized	22,000
Cash surrender value of bank owned life insurance	3,976,000	$ 3,905,000
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, accumulated benefit obligation	5,163,000
Settlement gains recognized	118,000
Defined Benefit Pension Plan [Member] | Scottdale Bank and Trust Company [Member] | Other Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement gains recognized	$ 737,000
Defined Benefit Pension Plan [Member] | Maximum [Member] | Scottdale Bank and Trust Company [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target portfolio allocation	20.00%
Defined Benefit Pension Plan [Member] | Maximum [Member] | Scottdale Bank and Trust Company [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target portfolio allocation	50.00%
Defined Benefit Pension Plan [Member] | Maximum [Member] | Scottdale Bank and Trust Company [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target portfolio allocation	60.00%
Defined Benefit Pension Plan [Member] | Minimum [Member] | Scottdale Bank and Trust Company [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target portfolio allocation	30.00%
Defined Benefit Pension Plan [Member] | Minimum [Member] | Scottdale Bank and Trust Company [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of target portfolio allocation	40.00%

Postretirement Benefit Plans _2

Postretirement Benefit Plans (Net Funded Status) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in benefit obligations:
Change in benefit obligations: Settlement loss	$ 737,000
Change in fair value of plan assets:
Funded status at year end	345,000
Defined Benefit Postretirement Health And Life Coverage [Member]
Change in benefit obligations:
Benefit obligations	508,000	$ 540,000
Change in benefit obligations: Service cost	4,000	4,000	$ 4,000
Change in benefit obligations: Interest cost	17,000	20,000	23,000
Change in benefit obligations: Change in experience	(38,000)	(11,000)
Change in benefit obligations: Change in assumptions	(17,000)	20,000
Change in benefit obligations: Change due to plan amendment	60,000
Change in benefit obligations/fair value of plan assets: Benefit payments	(59,000)	(65,000)
Benefit obligations	475,000	508,000	540,000
Change in fair value of plan assets:
Change in fair value of plan assets: Employer contributions	59,000	65,000
Change in benefit obligations/fair value of plan assets: Benefit payments	(59,000)	(65,000)
Funded status at year end	(475,000)	(508,000)
Director's Retirement Plan [Member]
Change in benefit obligations:
Benefit obligations	1,116,000	1,122,000
Change in benefit obligations: Service cost	36,000	35,000	34,000
Change in benefit obligations: Interest cost	38,000	43,000	46,000
Change in benefit obligations: Actuarial gain (loss)	5,000	6,000
Change in benefit obligations: Change in assumptions	(5,000)	2,000
Change in benefit obligations/fair value of plan assets: Benefit payments	(90,000)	(92,000)
Benefit obligations	1,100,000	1,116,000	$ 1,122,000
Change in fair value of plan assets:
Change in fair value of plan assets: Employer contributions	90,000	92,000
Change in benefit obligations/fair value of plan assets: Benefit payments	(90,000)	(92,000)
Funded status at year end	(1,100,000)	(1,116,000)
Defined Benefit Pension Plan [Member]
Change in benefit obligations:
Benefit obligations	10,542,000
Change in benefit obligations: Service cost	287,000
Change in benefit obligations: Interest cost	392,000
Change in benefit obligations: Settlement loss	118,000
Change in benefit obligations: Actuarial gain (loss)	(2,271,000)
Change in benefit obligations/fair value of plan assets: Settlement payments	(3,828,000)
Change in benefit obligations/fair value of plan assets: Benefit payments	(77,000)
Benefit obligations	5,163,000	10,542,000
Change in fair value of plan assets:
Fair value of plan assets	8,121,000
Change in fair value of plan assets: Return on plan assets	57,000
Change in fair value of plan assets: Employer contributions	600,000
Change in benefit obligations/fair value of plan assets: Benefit payments	(77,000)
Change in fair value of plan assets: Administrative expenses	(55,000)
Change in benefit obligations/fair value of plan assets: Settlement payments	(3,828,000)
Fair value of plan assets	4,818,000	$ 8,121,000
Funded status at year end	$ (345,000)

Postretirement Benefit Plans (A

Postretirement Benefit Plans (Amounts Recognized in Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability	$ 475	$ 508
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability	1,100	$ 1,116
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability	$ 345

Postretirement Benefit Plans _3

Postretirement Benefit Plans (Amounts Recognized in Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain), pretax	$ (76)	$ (22)
Net prior service cost, pretax	(89)	(174)
Unrecognized actuarial gain	76	22
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain), pretax	67	67
Net prior service cost, pretax		22
Unrecognized actuarial gain	(67)	$ (67)
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain), pretax	(994)
Unrecognized actuarial gain	$ 994

Postretirement Benefit Plans _4

Postretirement Benefit Plans (Net Periodic Benefit (Income) Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 4	$ 4
Interest cost	17	20	23
Amortization of prior service cost	(25)	(35)	(35)
Amortization of net (gain) or loss	(1)
Net periodic postretirement benefit (income) cost	(5)	(11)	(8)
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	36	35	34
Interest cost	38	43	46
Amortization of prior service cost	22	22	22
Net periodic postretirement benefit (income) cost	96	$ 100	$ 102
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	287
Interest cost	392
Expected return on plan assets	(423)
Net periodic postretirement benefit (income) cost	$ 256

Postretirement Benefit Plans _5

Postretirement Benefit Plans (Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assumptions used calculating benefit obligation, Discount rate	4.00%	3.50%
Defined benefit plan, assumptions used calculating benefit obligation, Rate of compensation increase	3.00%	2.50%
Defined benefit plan, assumptions used calculating net periodic benefit cost, Discount rate	3.50%	4.00%	4.25%
Defined benefit plan, assumptions used calculating net periodic benefit cost, Rate of compensation increase	2.50%	3.00%	3.25%
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assumptions used calculating benefit obligation, Discount rate	4.00%	3.50%
Defined benefit plan, assumptions used calculating net periodic benefit cost, Discount rate	4.00%	4.00%	4.25%
Defined benefit plan, assumptions used calculating benefit obligation, Change in consumer price index	2.00%	1.50%
Defined benefit plan, assumptions used calculating net periodic benefit cost, Changes in consumer price index	2.00%	1.50%	2.25%
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assumptions used calculating benefit obligation, Discount rate	4.25%
Defined benefit plan, assumptions used calculating benefit obligation, Rate of compensation increase	3.00%
Defined benefit plan, assumptions used calculating benefit obligation, Expected long-term return on plan assets	5.00%

Postretirement Benefit Plans (H

Postretirement Benefit Plans (Health Care Cost Trend Rates) (Details) - Defined Benefit Postretirement Health And Life Coverage [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next year	5.50%	6.00%	6.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	5.40%	5.40%	5.50%
Year that the rate reaches the ultimate trend rate	2022	2024	2018

Postretirement Benefit Plans (E

Postretirement Benefit Plans (Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates) (Details) - Defined Benefit Postretirement Health And Life Coverage [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Effect of one percentage point increase on accumulated postretirement benefit obligation	$ 6
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	$ (9)

Postretirement Benefit Plans _6

Postretirement Benefit Plans (Expected Benefit Payments) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018
Defined Benefit Postretirement Health And Life Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
1/1/2019 to 12/31/2019		$ 60,000
1/1/2020 to 12/31/2020		50,000
1/1/2021 to 12/31/2021		34,000
1/1/2022 to 12/31/2022		38,000
1/1/2023 to 12/31/2023		31,000
1/1/2024 to 12/31/2028		160,000
Defined contribution plan, employer discretionary contribution amount	$ 73,000
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
1/1/2019 to 12/31/2019		95,000
1/1/2020 to 12/31/2020		97,000
1/1/2021 to 12/31/2021		108,000
1/1/2022 to 12/31/2022		107,000
1/1/2023 to 12/31/2023		106,000
1/1/2024 to 12/31/2028		376,000
Defined contribution plan, employer discretionary contribution amount	94,000
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
1/1/2019 to 12/31/2019		92,000
1/1/2020 to 12/31/2020		115,000
1/1/2021 to 12/31/2021		144,000
1/1/2022 to 12/31/2022		160,000
1/1/2023 to 12/31/2023		162,000
1/1/2024 to 12/31/2028		$ 1,714,000
Defined contribution plan, employer discretionary contribution amount	$ 600,000

Postretirement Benefit Plans (W

Postretirement Benefit Plans (Weighted-Average Asset Allocation By Investment Category) (Details) - Defined Benefit Pension Plan [Member]	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Weighted-average asset allocation percent	100.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Weighted-average asset allocation percent	50.44%
Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Weighted-average asset allocation percent	38.14%
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Weighted-average asset allocation percent	11.42%

Postretirement Benefit Plans (P

Postretirement Benefit Plans (Plan Assets at Fair Value) (Details) - Defined Benefit Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	$ 4,818	$ 8,121
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	4,268
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	550
Cash and Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	2,430
Mining [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	36
Manufacturing [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	888
Transportation, Communications, Electric, Gas, and Sanitary Services [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	468
Finance, Insurance, and Real Estate [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	248
Services [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	189
Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	9
Corporate debt securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets	$ 550

Other Benefit Plans (Narrative)

Other Benefit Plans (Narrative) (Details)	Aug. 31, 2018EmployeeYear	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)
Defined Benefit Plan Disclosure [Line Items]
Shares purchased by participants | shares		4,296	1,345
Average purchase price per share of shares purchased | $ / shares		$ 28.94	$ 31.136
Director's Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement with individual, recorded liability		$ 838,000	$ 683,000
Deferred compensation arrangement with individual, compensation expense		31,000	25,000	$ 21,000
Salary Continuation Agreement [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement with individual, recorded liability		236,000	246,000
Deferred compensation arrangement with individual, compensation expense		$ 17,000	17,000	17,000
Defined benefit plan, maximum coverage period		15 years
Cash surrender value of bank owned life insurance		$ 1,352,000	1,317,000
Split Dollar Life Insurance Arrangements [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash surrender value of bank owned life insurance		1,387,000	1,375,000
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement with individual, recorded liability		106,000	125,000
Deferred compensation arrangement with individual, compensation expense		78,000	5,000	6,000
Phoenix Bancorp Incorporated [Member] | Split Dollar Life Insurance Arrangements [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash surrender value of bank owned life insurance		4,010,000	3,924,000
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, associated expense		514,000	383,000	362,000
401(k) Plan [Member] | Scottdale and First Priority [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, associated expense		0
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, associated expense		0	$ 0	$ 0
Accrued benefit liability		345,000
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, maximum coverage period	15 years
Number of executive officers covered | Employee	4
Normal retirement age | Year	70
Vesting term	One-half of the benefit vests on January 1, 2022, with an additional 10% vesting each January 1 thereafter until fully vested on January 1, 2027.
Accrued benefit liability		$ 73,000

Other Benefit Plans (Schedule o

Other Benefit Plans (Schedule of Employees Eligible to Participate in Employee Stock Purchase Plan) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]
ESPP shares purchased	4,132	3,578	4,465
Average purchase price per share	$ 28.716	$ 29.027	$ 18.520

Federal Income Taxes (Net Defer

Federal Income Taxes (Net Deferred Tax Asset) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred tax assets, Allowance for loan and lease losses	$ 1,763	$ 1,597
Deferred tax assets, Loan fees	136	105
Deferred tax assets, Deferred compensation	508	221
Deferred tax assets, Benefit plans	134	320
Deferred tax assets, Unrealized loss on securities	862	574
Deferred tax assets, Sale/leaseback adjustment	66	72
Deferred tax assets, Business combination adjustments	1,692	358
Deferred tax assts, Acquired NOL and charitable contribution carryforwards	1,391
Deferred tax assets, Acquired AMT carryforward	1,433
Deferred tax assets, Other	128	108
Deferred tax assets, Gross, Total	8,113	3,355
Deferred tax liabilities, Depreciation	(1,073)	(619)
Deferred tax liabilities, Bond accretion	(29)	(9)
Deferred tax liabilities, Goodwill and intangibles	(348)	(329)
Deferred tax liabilities, Prepaid expenses	(515)	(333)
Deferred tax liabilities, Business combination adjustments	(948)	(176)
Deferred tax liabilities, Benefit plans	(459)
Deferred tax liabilities, Other	(45)	(1)
Deferred tax liabilities, Gross, Total	(3,417)	(1,467)
Deferred tax asset, net	$ 4,696	$ 1,888

Federal Income Taxes (Narrative

Federal Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Valuation allowance carryforwards against net operating loss	$ 0
Valuation allowance carryforwards against charitable contribution	$ 0
Charitable contribution carryforwards expiration	between 2019 and 2021
Net operating loss carryforwards	$ 5,465,000
Allowable amount to be used to offset taxable income	$ 1,854,000
Income tax impacts of the components of other comprehensive income	21.00%	34.00%	34.00%
Rate change adjustment		$ 1,169,000
Unrecognized tax benefits that would affect the effective income tax rate if recognized	$ 0
Income tax examination, penalties and interest expense	0	0	$ 0
Income tax examination, penalties and interest accrued	$ 0	$ 0

Federal Income Taxes (Provision

Federal Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current expense									$ 812	$ 2,672	$ 2,613
Deferred expense (benefit)									1,317	1,828	(336)
Provision for income taxes	$ 916	$ 548	$ 452	$ 213	$ 2,170	$ 871	$ 769	$ 690	$ 2,129	$ 4,500	$ 2,277

Federal Income Taxes (Schedule

Federal Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Provision at the expected statutory rate									$ 2,672,000	$ 3,940,000	$ 3,428,000
Effect of tax-exempt income									(704,000)	(668,000)	(1,089,000)
Effect of investment in life insurance									(60,000)	(89,000)	(90,000)
Nondeductible interest									40,000	30,000	41,000
Nondeductible merger and acquisition expense									193,000	191,000
Rate change adjustment										1,169,000
Other items									(12,000)	(73,000)	(13,000)
Provision for income taxes	$ 916,000	$ 548,000	$ 452,000	$ 213,000	$ 2,170,000	$ 871,000	$ 769,000	$ 690,000	$ 2,129,000	$ 4,500,000	$ 2,277,000

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital for Capital Adequacy (To Average Assets), Ratio		4.00%
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets), ratio		4.50%
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets), Ratio		6.00%	4.00%
Total Capital for Capital Adequacy (To Risk Weighted Assets), Ratio		8.00%
Capital Conservation Buffer Percentage		2.50%
Common Equity Tier 1 Capital Ratio with Capital Conservation Buffer		7.00%
Tier 1 Capital Ratio with Capital Conservation Buffer		8.50%
Total Capital Ratio with Capital Conservation Buffer		10.50%
Annual Phase in Percentage of Capital Conservation Buffer		0.625%
Capital Conservation Buffer Phase in Beginning Year Month		2016-01
Capital Conservation Buffer Phase in End Year Month		2019-01
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval		$ 4,207
Corporation [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (To Average Assets)		155,662	$ 74,417
Common Equity Tier 1 Capital (to Risk Weighted Assets)		155,662	74,417
Tier 1 Capital (To Risk Weighted Assets)		155,662	74,417
Total Capital (To Risk Weighted Assets)		$ 191,300	$ 99,466
Tier 1 Capital (to Average Assets), Ratio		8.00%	6.50%
Common Equity Tier 1 Capital (to Risk Weighted Assets), ratio		10.00%	8.40%
Tier 1 Capital (To Risk Weighted Assets), Ratio		10.00%	8.40%
Total Capital (To Risk Weighted Assets), Ratio		12.30%	11.30%
Tier 1 Capital for Capital Adequacy (To Average Assets)	[1]	$ 77,499	$ 45,857
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets)	[1]	98,977	50,661
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets)	[1]	122,265	63,877
Total Capital for Capital Adequacy (To Risk Weighted Assets)	[1]	$ 153,317	$ 81,498
Tier 1 Capital for Capital Adequacy (To Average Assets), Ratio	[1]	4.00%	4.00%
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets), ratio	[1]	6.375%	5.75%
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets), Ratio	[1]	7.875%	7.25%
Total Capital for Capital Adequacy (To Risk Weighted Assets), Ratio	[1]	9.875%	9.25%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (To Average Assets)		$ 171,776	$ 88,294
Common Equity Tier 1 Capital (to Risk Weighted Assets)		171,776	88,294
Tier 1 Capital (To Risk Weighted Assets)		171,776	88,294
Total Capital (To Risk Weighted Assets)		$ 180,332	$ 96,005
Tier 1 Capital (to Average Assets), Ratio		8.90%	7.70%
Common Equity Tier 1 Capital (to Risk Weighted Assets), ratio		11.10%	10.00%
Tier 1 Capital (To Risk Weighted Assets), Ratio		11.10%	10.00%
Total Capital (To Risk Weighted Assets), Ratio		11.60%	10.90%
Tier 1 Capital for Capital Adequacy (To Average Assets)	[1]	$ 77,230	$ 45,846
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets)	[1]	98,963	50,661
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets)	[1]	122,248	63,877
Total Capital for Capital Adequacy (To Risk Weighted Assets)	[1]	$ 153,295	$ 81,498
Tier 1 Capital for Capital Adequacy (To Average Assets), Ratio	[1]	4.00%	4.00%
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets), ratio	[1]	6.375%	5.75%
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets), Ratio	[1]	7.875%	7.25%
Total Capital for Capital Adequacy (To Risk Weighted Assets), Ratio	[1]	9.875%	9.25%
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Average Assets)		$ 96,537	$ 57,308
Common Equity Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets)		100,903	57,269
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets)		124,189	70,485
Total Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets)		$ 155,236	$ 88,106
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Average Assets), Ratio		5.00%	5.00%
Common Equity Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets), ratio		6.50%	6.50%
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets), Ratio		8.00%	8.00%
Total Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets), Ratio		10.00%	10.00%
[1]	The minimum amounts and ratios as of December 31, 2018 include the third year phase in of the capital conservation buffer of 1.875% required by the Basel III framework. As of December 31, 2017, minimum amounts and ratios include the second year phase in of the capital conservation buffer of 1.25% required by the Basel III framework.

Regulatory Matters (Parenthetic

Regulatory Matters (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Third Year Phased In [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital required including percentage of capital conservation buffer	1.875%
Second Year Phased In [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital required including percentage of capital conservation buffer		1.25%

Concentration of Risk and Off_2

Concentration of Risk and Off-Balance Sheet Risk (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Commitments to extend credit	$ 346,238,000	$ 199,240,000
Balance of loans sold under the program	$ 5,836,000	$ 7,314,000
Concentration risk, benchmark description	10% or more of the Bank's total net loans outstanding
Benchmark - Loans Receivable, Net [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	61.80%	51.10%
Financial Standby Letters of Credit [Member]
Concentration Risk [Line Items]
Commitments to extend credit	$ 20,839,000	$ 20,496,000

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)Apartment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Other Commitments [Line Items]
Number of apartments under the project | Apartment	37
Limited partner capital contribution commitment	$ 7,579,000
Project investment amortization period	10 years
Annual LIHTCs mount awarded for the project	$ 861,000
Total anticipated LIHTCs amount under the housing project	8,613,000
Total investment in limited partnership		$ 233,000	$ 277,000
Minimum net assets qualified for small banks assessment credits		10,000,000,000
Total assessment credit		$ 492,000
Minimum [Member]
Other Commitments [Line Items]
Small bank growth reserve ratio		1.15%
Reserve ratio for assessment credits to be contingent		1.38%
Maximum [Member]
Other Commitments [Line Items]
Small bank growth reserve ratio		1.35%
Other Assets [Member]
Other Commitments [Line Items]
Total investment in limited partnership	$ 1,710,000	$ 1,710,000

Common Stock (Details)

Common Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 25, 2014	May 06, 2014
Employee [Member]
Class of Stock [Line Items]
Restricted shares, vesting period	4 years
Director [Member]
Class of Stock [Line Items]
Restricted shares, vesting period	12 months
Dividend Reinvestment Plan [Member]
Class of Stock [Line Items]
Shares authorized per plan	330,750
2014 Restricted Stock Plan [Member]
Class of Stock [Line Items]
Shares authorized per plan				100,000	100,000
Shares granted, net	36,859
Shares granted	12,250	10,440
Shares forfeited	1,876	0	470
Unrecognized compensation cost related to all non-vested share-based compensation awards		$ 582,000
Weighted average recognition period		2 years 3 months 18 days
2014 Restricted Stock Plan [Member] | Employee [Member]
Class of Stock [Line Items]
Shares granted	7,450	6,040	7,450
2014 Restricted Stock Plan [Member] | Director [Member]
Class of Stock [Line Items]
Shares granted	4,800	4,400

Common Stock (Schedule of Compe

Common Stock (Schedule of Compensation Expense and Related Tax Benefits for Restricted Stock Awards Recognized) (Details) - 2014 Restricted Stock Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense	$ 267	$ 145	$ 53
Income tax benefit	(56)	(49)	(18)
Net income effect	$ 211	$ 96	$ 35

Common Stock (Schedule of Non-V

Common Stock (Schedule of Non-Vested Restricted Stock) (Details) - 2014 Restricted Stock Plan [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Non-vested at January 1, 2018	19,499
Shares, Vested	(9,647)
Shares, Forfeited	(1,876)	0	(470)
Shares, Granted	12,250	10,440
Shares, Non-vested at December 31, 2018	20,226	19,499
Weighted-Average Grant Date Fair Value, Non-vested at January 1, 2018	$ 22.54
Weighted-Average Grant Date Fair Value, Vested	22.85
Weighted-Average Grant Date Fair Value, Forfeited	24.20
Weighted-Average Grant Date Fair Value, Granted	33.50
Weighted-Average Grant Date Fair Value, Non-vested at December 31, 2018	$ 28.76	$ 22.54

Preferred Stock (Narrative) (De

Preferred Stock (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 14, 2018
Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Issued	3,404
Preferred stock, liquidation preference value	$ 1,000
Preferred stock, redemption amount		$ 3,404,000
Preferred Stock [Member]
Class of Stock [Line Items]
Number of rights to receive cumulative preferred stock upon conversion of fixed rate cumulative perpetual preferred stock	1
Preferred stock, liquidation preference per share	$ 1,000
Stock issued during period, shares, new issues	3,404
Preferred stock, value	$ 3,404,000
Preferred Stock, Dividend Payment Terms	Dividends were payable quarterly on February 15, May 15, August 15 and November 15 of each year. The dividend rate on the Mid Penn Preferred Stock was fixed at 9%.
Preferred Stock Dividend Rate Percentage	9.00%

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Estate fee income service period	18 months

Parent Company Statements (Cond

Parent Company Statements (Condensed Balance Sheets) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents	$ 40,065,000	$ 23,514,000
Investment in subsidiaries	233,000	277,000
Other assets	7,593,000	3,594,000
Total Assets	2,077,981,000	1,170,354,000
Subordinated debt	27,082,000	17,338,000
Other liabilities	8,278,000	6,137,000
Shareholders' equity	223,209,000	75,703,000	$ 70,467,000	$ 70,068,000
Total Liabilities and Shareholders' Equity	2,077,981,000	1,170,354,000
Parent Company [Member]
Cash and cash equivalents	1,572,000	4,686,000
Investment in subsidiaries	239,323,000	89,581,000
Other assets	296,000
Total Assets	241,191,000	94,267,000
Subordinated debt	17,694,000	17,338,000
Other liabilities	288,000	1,226,000
Shareholders' equity	223,209,000	75,703,000
Total Liabilities and Shareholders' Equity	$ 241,191,000	$ 94,267,000

Parent Company Statements (Co_2

Parent Company Statements (Condensed Statement of Income and Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other expenses									$ (7,290)	$ (4,484)	$ (4,177)
Income before income tax and equity in undistributed earnings (loss) of subsidiary	$ 5,565	$ 2,712	$ 3,231	$ 1,217	$ 2,671	$ 3,120	$ 3,114	$ 2,684	12,725	11,589	10,081
Income tax benefit	(916)	(548)	(452)	(213)	(2,170)	(871)	(769)	(690)	(2,129)	(4,500)	(2,277)
NET INCOME	4,649	2,164	2,779	1,004					10,596	7,089	7,804
Series D preferred stock dividends	64	38							102
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 4,585	$ 2,126	$ 2,779	$ 1,004	$ 501	$ 2,249	$ 2,345	$ 1,994	10,494	7,089	7,804
Comprehensive income									10,257	8,209	3,139
Parent Company [Member]
Dividends from subsidiaries									10,837	9,657	2,871
Other income										19	33
Total Income									10,837	9,676	2,904
Other expenses									(5,668)	(1,899)	(606)
Total Expense									(5,668)	(1,899)	(606)
Income before income tax and equity in undistributed earnings (loss) of subsidiary									5,169	7,777	2,298
Equity in undistributed earnings (loss) of subsidiary									4,207	(1,136)	5,311
Income before income tax									9,376	6,641	7,609
Income tax benefit									1,220	448	195
NET INCOME									10,596	7,089	7,804
Series D preferred stock dividends									102
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS									10,494	7,089	7,804
Comprehensive income									$ 10,257	$ 8,209	$ 3,139

Parent Company Statements (Co_3

Parent Company Statements (Condensed Statement of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Income	$ 10,596	$ 7,089	$ 7,804
Decrease (increase) in other assets	(1,779)	(380)	(99)
Increase (decrease) in other liabilities	(3,175)	(172)	4
Net Cash Provided By Operating Activities	10,983	11,895	21,848
Proceeds from the sale of investment securities	158,271	52,932	111,390
Net Cash Provided By (Used In) Investing Activities	21,847	(163,797)	(86,799)
Dividends paid	(4,513)	(2,204)	(2,452)
Deferred financing fees paid for subordinated debt issuance		(85)
Subordinated debt issuance		10,000
Net Cash (Used In) Provided By Financing Activities	(16,279)	129,443	97,640
Net increase (decrease) in cash and cash equivalents	16,551	(22,459)	32,689
Cash and cash equivalents, beginning of year	23,514	45,973	13,284
Cash and cash equivalents, end of year	40,065	23,514	45,973
Employee [Member]
Stock Purchase Plan share issuance	119	104	82
Director [Member]
Stock Purchase Plan share issuance	124	42
Series D Preferred Stock [Member]
Preferred stock dividends paid	(102)
Preferred stock redemption	(3,404)
Parent Company [Member]
Net Income	10,596	7,089	7,804
Equity in undistributed loss (earnings) of subsidiaries	(4,207)	1,136	(5,311)
Decrease (increase) in other assets	(49)	240	59
Increase (decrease) in other liabilities	1,120	626	457
Net Cash Provided By Operating Activities	7,460	9,091	3,009
Net cash paid for acquisitions	(2,798)
Proceeds from the sale of investment securities		618
Repayment from (investment in) subsidiary		(12,600)
Net Cash Provided By (Used In) Investing Activities	(2,798)	(11,982)
Dividends paid	(4,513)	(3,264)	(2,875)
Deferred financing fees paid for subordinated debt issuance		(85)
Subordinated debt issuance		10,000
Net Cash (Used In) Provided By Financing Activities	(7,776)	6,797	(2,793)
Net increase (decrease) in cash and cash equivalents	(3,114)	3,906	216
Cash and cash equivalents, beginning of year	4,686	780	564
Cash and cash equivalents, end of year	1,572	4,686	780
Parent Company [Member] | Employee [Member]
Stock Purchase Plan share issuance	119	104	$ 82
Parent Company [Member] | Director [Member]
Stock Purchase Plan share issuance	124	$ 42
Parent Company [Member] | Series D Preferred Stock [Member]
Preferred stock dividends paid	(102)
Preferred stock redemption	$ (3,404)

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)	Jan. 01, 2019USD ($)LeaseLocation	Dec. 31, 2017USD ($)
ASU 2017-07 | Salaries and Employee Benefits [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Service cost	$ 287,000
ASU 2017-07 | Other Income [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net benefit costs	768,000
ASU 2017-07 | Other Expense [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net benefit costs	$ 93,000
ASU 2016-02 [Member] | Subsequent Event [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
ROU asset		$ 11,661,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]		us-gaap:OtherAssetsMember
Lease liability		$ 12,866,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]		us-gaap:OtherLiabilitiesMember
Opening adjustment to retaining earnings		$ 316,000
Number of retail branch locations which deferred sale/lease back gain recorded | Location		2
Number of leased properties | Lease		24
ASU 2016-01 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
One-time cumulative-effect adjustment based upon adoption			$ (9,000)
ASU 2016-01 [Member] | Deferred Tax Assets [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
One-time cumulative-effect adjustment based upon adoption			(9,000)
ASU 2016-01 [Member] | Retained Earnings [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
One-time cumulative-effect adjustment based upon adoption			(44,000)
ASU 2016-01 [Member] | Accumulated Other Comprehensive Loss [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
One-time cumulative-effect adjustment based upon adoption			$ 35,000

Summary of Quarterly Consolid_3

Summary of Quarterly Consolidated Financial Data (Unaudited) (Quarterly Condensed Financials) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Interest Income	$ 22,371	$ 19,583	$ 13,720	$ 12,980	$ 11,304	$ 11,150	$ 10,879	$ 10,559	$ 68,654	$ 43,892	$ 40,212
Interest Expense	4,640	3,672	2,306	2,102	1,817	1,634	1,469	1,384	12,720	6,304	5,367
Net Interest Income	17,731	15,911	11,414	10,878	9,487	9,516	9,410	9,175	55,934	37,588	34,845
Provision for loan and lease losses	275	100		125	100		100	125	500	325	1,870
Net Interest Income After Provision for Loan and Lease Losses	17,456	15,811	11,414	10,753	9,387	9,516	9,310	9,050	55,434	37,263	32,975
Noninterest Income	2,091	2,165	1,559	1,647	1,331	1,564	1,362	1,436	7,462	5,707	5,946
Noninterest Expense	13,982	15,264	9,742	11,183	8,047	7,960	7,558	7,802	50,171	31,381	28,840
INCOME BEFORE PROVISION FOR INCOME TAXES	5,565	2,712	3,231	1,217	2,671	3,120	3,114	2,684	12,725	11,589	10,081
Provision for Income Taxes	916	548	452	213	2,170	871	769	690	2,129	4,500	2,277
NET INCOME	4,649	2,164	2,779	1,004					10,596	7,089	7,804
Series D preferred stock dividends	64	38							102
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 4,585	$ 2,126	$ 2,779	$ 1,004	$ 501	$ 2,249	$ 2,345	$ 1,994	$ 10,494	$ 7,089	$ 7,804
Basic Earnings Per Common Share	$ 0.54	$ 0.28	$ 0.45	$ 0.17	$ 0.12	$ 0.53	$ 0.55	$ 0.47	$ 1.48	$ 1.67	$ 1.85
Cash Dividends Declared	$ 0.15	$ 0.15	$ 0.15	$ 0	$ 0.38	$ 0.13	$ 0.13	$ 0.13	$ 0.45	$ 0.77	$ 0.68