Park National (PRK) 10-K 26 Feb 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 25, 2021	Jun. 30, 2020
Cover [Abstract]
Entity Tax Identification Number	31-1179518
Entity Address, Address Line One	50 North Third Street,
Entity Address, City or Town	Newark,
Entity Address, Address Line Two	P.O. Box 3500
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43058-3500
City Area Code	(740)
Title of 12(b) Security	Common Shares, without par value
Local Phone Number	349-8451
Trading Symbol	PRK
Entity Voluntary Filers	No
Security Exchange Name	NYSEAMER
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float			$ 1,118,541,740
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		16,314,191
Amendment Flag	false
Document Fiscal Year Focus	2020
Entity Central Index Key	0000805676
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Registrant Name	PARK NATIONAL CORPORATION
Entity File Number	1-13006
Document Period End Date	Dec. 31, 2020
Document Annual Report	true
Document Type	10-K
Document Transition Report	false
ICFR Auditor Attestation Flag	true
Entity Incorporation, State or Country Code	OH

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets [Abstract]
Cash and Due from Banks	$ 155,596	$ 135,567
Money market instruments	214,878	24,389
Cash and cash equivalents	370,474	159,956
Available-for-sale Securities	1,059,341	1,209,701
Other Investments and Securities, at Cost	65,465	69,806
Investments	1,124,806	1,279,507
Total loans	7,177,785	6,501,404
Allowance for loan losses	85,675	56,679
Net loans	7,092,110	6,444,725
Bank Owned Life Insurance	216,225	212,529
Prepaid Expense, Current	103,523	101,990
Goodwill	159,595	159,595
Intangible Assets, Net (Excluding Goodwill)	9,260	11,523
Property, Plant and Equipment, Net	88,660	73,322
Amortization Method Qualified Affordable Housing Project Investments	56,024	53,070
Accrued Investment Income Receivable	24,926	24,217
Other real estate owned	1,431	4,029
Mortgage loan servicing rights	12,210	10,070
Operating Lease, Right-of-Use Asset	15,078	13,714
Other Assets, Miscellaneous	4,699	10,130
Other Assets	691,631	674,189
Assets	9,279,021	8,558,377
Liabilities [Abstract]
Non-interest bearing	2,727,100	1,959,935
Interest-bearing Deposit Liabilities	4,845,258	5,092,677
Total deposits	7,572,358	7,052,612
Short-term Debt	342,230	230,657
Long-term Debt	32,500	192,500
Subordinated Debt	187,774	15,000
Total borrowings	562,504	438,157
Operating Lease, Liability	16,053	14,482
Interest Payable	3,860	2,927
Qualified Affordable Housing Project Investments, Commitment	29,298	25,894
Other Liabilities Unclassified	54,692	55,291
Other Liabilities, Total	103,903	98,594
Total liabilities	8,238,765	7,589,363
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	460,687	459,389
Accumulated Other Comprehensive Income (Loss), Net of Tax	5,571	(9,589)
Retained Earnings (Accumulated Deficit)	704,764	646,847
Treasury Stock, Value	130,766	127,633
Total shareholders’ equity	1,040,256	969,014
Liabilities and Equity, Total	$ 9,279,021	$ 8,558,377

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest and Dividend Income, Operating [Abstract]
Interest and Fee Income, Loans and Leases			$ 328,727	$ 321,385	$ 271,145
Interest and Dividend Income, Securities, by Classification [Abstract]
Interest Income, Securities, US Treasury and Other US Government			19,818	26,213	29,479
Interest Income, Securities, State and Municipal			8,436	8,955	8,770
Other Interest and Dividend Income			739	3,947	1,407
Interest and Dividend Income, Operating, Total	$ 91,800	$ 88,909	357,720	360,500	310,801
Interest Expense, Deposits [Abstract]
Interest Expense, NOW Accounts, Money Market Accounts, and Savings Deposits			9,142	33,348	19,815
Interest Expense, Time Deposits			12,186	17,494	12,375
Interest Expense, Borrowings [Abstract]
Interest Expense, Short-term Borrowings			1,110	2,476	1,600
Interest Expense, Long-term Debt			7,652	9,445	10,113
Total interest expense	5,479	12,626	30,090	62,763	43,903
Net interest income	86,321	76,283	327,630	297,737	266,898
Provision for loan losses	(19,159)	5,153	12,054	6,171	7,945
Interest Income (Expense), after Provision for Loan Loss, Total			315,576	291,566	258,953
Noninterest Income [Abstract]
Debit card fee income			22,160	20,250	17,317
Bank Owned Life Insurance Income			4,789	4,557	6,815
ATM Fees			1,773	1,828	1,978
Gains (Losses) on Sales of Other Real Estate			1,207	(222)	4,235
Gain (Loss) on Sale of Investments			3,286	(421)	(2,271)
Gain on equity securities, net			2,182	5,118	4,616
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component			7,952	4,732	6,820
Gain (Loss) on Sales of Loans, Net			0	0	2,826
Noninterest Income, Other			7,386	7,248	6,745
Total other income			125,664	97,193	101,101
Noninterest Expense [Abstract]
Salaries			128,040	119,514	103,755
Employee benefits			37,115	36,806	30,289
Occupancy expense			13,802	12,815	11,251
Furniture and equipment expense			18,805	17,032	16,139
Data processing fees			11,659	10,750	8,477
Professional fees and services			31,303	33,317	28,894
Marketing			5,828	5,753	5,144
Insurance			6,423	3,130	5,289
Communication			4,084	5,351	4,981
State tax expense			3,991	3,829	3,813
Amortization of Intangible Assets			2,263	2,355	578
Payment for Debt Extinguishment or Debt Prepayment Cost	8,700	1,800	10,529	612	197
Foundation contribution expense			3,000	1,500	3,000
Miscellaneous			9,753	11,224	6,948
Total other expense			286,595	263,988	228,755
Income before income taxes	55,475	27,340	154,645	124,771	131,299
Income taxes			26,722	22,071	20,912
Net Income (Loss) Attributable to Parent	$ 45,200	$ 22,372	$ 127,923	$ 102,700	$ 110,387
Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 2.77	$ 1.37	$ 7.85	$ 6.33	$ 7.13
Diluted (in dollars per share)	$ 2.75	$ 1.36	$ 7.80	$ 6.29	$ 7.07
Fiduciary and Trust [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax			$ 28,873	$ 27,768	$ 26,293
Deposit Account [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax			8,445	10,835	11,461
Bank Servicing [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax			37,611	15,500	14,266
Noninterest Income, Other			$ 37,600	$ 15,500	$ 14,300

Statement of Comprehensive Inco

Statement of Comprehensive Income (Statement) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 127,923	$ 102,700	$ 110,387
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	928	1,487	1,075
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	8,675	(1,511)	4,046
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total	7,747	(2,998)	2,971
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	2,596	(333)	(2,024)
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax	0	19,095	0
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax	25,747	18,227	(17,586)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	23,151	37,655	(15,562)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(244)	(454)	0
Other Comprehensive Income (Loss), Net of Tax	15,160	40,199	(18,533)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	$ 143,083	$ 142,899	$ 91,854

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	AOCI Attributable to Parent [Member]Cumulative Effect, Period of Adoption, Adjustment	AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2017		$ 0	$ 307,726	$ 561,908	$ 3,806	$ (87,079)	$ (26,454)	$ (3,806)
Beginning balance (Adjustments for New Accounting Pronouncement [Member]) at Dec. 31, 2017				563,825			(27,449)
Beginning balance (Accounting Standards Update 2016-01 [Member]) at Dec. 31, 2017				1,917					$ (995)
Beginning balance, shares at Dec. 31, 2017		0	15,288,194
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	$ 110,387			110,387
Other Comprehensive Income (Loss), Net of Tax	$ (18,533)						(18,533)
Dividends, Common Stock, Cash				63,555
Stock Issued During Period, Shares, Dividend Reinvestment Plan			44
Stock Issued During Period, Value, Dividend Reinvestment Plan			$ 4
Stock Issued During Period, Shares, Acquisitions	435,457		435,457
Stock Issued During Period, Value, Acquisitions			$ 48,519
Allocated Share-based Compensation Expense	$ 4,000		$ 3,954
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			12,921
Stock Granted, Value, Share-based Compensation, Net of Forfeitures			$ 1,597	317		1,304
Treasury Stock, Shares, Acquired			50,000
Treasury Stock, Value, Acquired, Cost Method						(5,784)
Treasury Stock Reissued Shares For Director Grants	11,650		11,650
Treasury shares reissued for director grants				77		1,186
Ending balance, shares at Dec. 31, 2018		0	15,698,178
Ending balance at Dec. 31, 2018		$ 0	$ 358,598	614,069		(90,373)	(49,788)
Ending balance (Adjustments for New Accounting Pronouncement [Member]) at Dec. 31, 2018				613,926
Ending balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018				(143)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 4.07
Net Income (Loss) Attributable to Parent	$ 102,700			102,700
Other Comprehensive Income (Loss), Net of Tax	$ 40,199						40,199
Dividends, Common Stock, Cash				69,482
Stock Issued During Period, Shares, Dividend Reinvestment Plan			171
Stock Issued During Period, Value, Dividend Reinvestment Plan			$ 3
Stock Issued During Period, Shares, Acquisitions	1,037,205		1,037,205
Stock Issued During Period, Value, Acquisitions			$ 98,275
Allocated Share-based Compensation Expense	$ 5,000		$ 4,999
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			18,983
Stock Granted, Value, Share-based Compensation, Net of Forfeitures			$ 2,480	273		1,926
Treasury Stock, Shares, Acquired			421,253
Treasury Stock, Value, Acquired, Cost Method						(40,535)
Treasury Stock Reissued Shares For Director Grants	13,500		13,500
Treasury shares reissued for director grants				24		1,349
Ending balance, shares at Dec. 31, 2019		0	16,346,442
Ending balance at Dec. 31, 2019	$ 969,014	$ 0	$ 459,389	646,847		(127,633)	(9,589)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 4.24
Net Income (Loss) Attributable to Parent	$ 127,923			127,923
Other Comprehensive Income (Loss), Net of Tax	15,160						15,160
Dividends, Common Stock, Cash				70,601
Stock Issued During Period, Shares, Dividend Reinvestment Plan			36
Stock Issued During Period, Value, Dividend Reinvestment Plan			$ 3
Allocated Share-based Compensation Expense	$ 6,000		$ 5,998
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			30,341
Stock Granted, Value, Share-based Compensation, Net of Forfeitures			$ 4,697	664		3,031
Treasury Stock, Shares, Acquired			76,000
Treasury Stock, Value, Acquired, Cost Method						(7,507)
Treasury Stock Reissued Shares For Director Grants	13,450		13,450
Treasury shares reissued for director grants				69		1,343
Ending balance, shares at Dec. 31, 2020		0	16,314,197
Ending balance at Dec. 31, 2020	$ 1,040,256	$ 0	$ 460,687	$ 704,764		$ (130,766)	$ 5,571
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 4.28

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Statement) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss) Attributable to Parent	$ 127,923	$ 102,700	$ 110,387
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Provision for loan losses	12,054	6,171	7,945
Amortization of Deferred Loan Origination Fees, Net	21,598	6,826	6,158
Goodwill, Purchase Accounting Adjustments	(2,403)	(3,373)	(793)
Depreciation	10,814	9,119	8,585
Accretion (Amortization) of Discounts and Premiums, Investments	(1,362)	(1,455)	(1,262)
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties	10,529	612	197
Deferred Income Tax Expense (Benefit)	(4,525)	(844)	538
Gain (Loss) on Sale of Investments	3,286	(421)	(2,271)
Gain on equity securities, net	2,182	5,118	4,616
Share-based Payment Arrangement, Noncash Expense	7,272	6,324	5,063
Payments for Loan Originations, Loans to be Sold in Secondary Market	1,026,346	338,437	202,827
Proceeds From Loan Sales	1,031,227	340,637	207,836
Gain (Loss) on Sales of Loans, Net	0	0	2,826
Gains (Losses) on Sales of Other Real Estate	1,207	(222)	4,235
Bank Owned Life Insurance Income	4,789	4,557	6,815
Amortization Method Qualified Affordable Housing Project Investments, Amortization	7,046	6,927	7,322
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Increase (Decrease) in Other Operating Assets	(9,216)	(12,530)	(9,904)
Increase (Decrease) in Other Operating Liabilities	(6,302)	(3,781)	5,131
Net Cash Provided by (Used in) Operating Activities, Total	111,646	111,626	131,994
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments for (Proceeds from) Federal Home Loan Bank Stock	(7,970)	(14,675)	(7,003)
Proceeds from Sale of Debt Securities	312,160	91,110	244,399
Proceeds from Sale, Maturity and Collection of Investments [Abstract]
Proceeds from Sale and Maturity of Held-to-maturity Securities	0	475	10,547
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale	223,728	195,989	197,826
Payments to Acquire Investments [Abstract]
Payments to Acquire Held-to-maturity Securities	0	0	7,133
Payments to Acquire Debt Securities, Available-for-sale	354,299	0	373,372
Payments to Acquire Available-for-sale Securities, Equity	3,567	100	2,590
Payments to Acquire Federal Reserve Bank Stock	0	(6,428)	0
Increase (Decrease) in Equity Securities, FV-NI	(2,120)	(6,429)	(1,153)
Payments for (Proceeds from) Loans and Leases	620,200	216,353	57,315
Proceeds from Sale of Other Loans Held-for-sale	4,400	0	3,000
Proceeds from Sale of Other Real Estate	5,654	1,465	13,094
Proceeds from Life Insurance Policy	1,360	1,571	8,096
Payment to Acquire Life Insurance Policy, Investing Activities	0	(3,000)	0
Payments for Affordable Housing Programs	6,596	6,038	0
Payments to Acquire Property, Plant, and Equipment	28,632	14,885	11,533
Payments to Acquire Businesses, Net of Cash Acquired	0	4,831	(12,270)
Net Cash Provided by (Used in) Investing Activities, Total	(455,902)	60,079	45,445
Net Cash Provided by (Used in) Financing Activities [Abstract]
Increase (Decrease) in Deposits	1,230,073	159,696	159,590
(Increase) decrease in one way sell deposits	(710,101)	0	0
Proceeds from (Repayments of) Short-term Debt	111,573	(20,072)	(169,323)
Proceeds from Issuance of Long-term Debt	0	50,000	50,000
Proceeds from Issuance of Subordinated Long-term Debt	172,620	0	0
Repayments of Long-term Debt	170,529		150,197
Payments Related to Tax Withholding for Share-based Compensation	1,002	827	610
Payments for Repurchase of Common Stock	7,507	40,535	5,784
Payments of Ordinary Dividends	70,353	69,113	63,013
Net cash provided by (used in) financing activities	554,774	(178,963)	(179,337)
Cash and Cash Equivalents, Period Increase (Decrease), Total	210,518	(7,258)	(1,898)
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	159,956	167,214	169,112
Cash and Cash Equivalents, at Carrying Value, Ending Balance	370,474	159,956	167,214
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	29,157	63,038	43,600
Income Taxes Paid	24,260	15,186	7,345
Noncash Investing and Financing Items [Abstract]
Debt Securities, Held-to-maturity, Transfer, Amount	0	349,773	0
Real Estate Owned, Transfer to Real Estate Owned	1,790	1,671	1,204
Other Significant Noncash Transaction, Value of Consideration Received	7,821	11,475	0
Other repossessed assets, transfer to repossessed assets	0	0	11,379
Affordable Housing Program Obligation, Period Increase (Decrease)	10,000	10,000	8,000
Mortgages [Member]
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Gain (Loss) on Sale of Loans and Leases	24,269	7,198	4,879
Consumer Portfolio Segment [Member]
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Increase (Decrease) in Prepaid Expense	$ (8,890)	$ (5,358)	$ (1,298)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,007,834	$ 1,187,499
Preferred Stock, Shares Authorized	200,000	200,000
Preferred Stock, Shares Issued	0	0
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Shares, Issued	17,623,163	17,623,199
Treasury Stock, Shares	1,308,966	1,276,757

Statement of Comprehensive In_2

Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax	$ 247	$ 395	$ 286
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	(2,306)	402	(1,076)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(690)	88	538
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax		5,076
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax	6,844	4,845	$ (4,674)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	$ (65)	$ (121)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The following is a summary of significant accounting policies followed in the preparation of the consolidated financial statements: Principles of Consolidation The consolidated financial statements include the accounts of Park National Corporation and its subsidiaries (“Park”, the “Company” or the “Corporation”), unless the context otherwise requires. Material intercompany accounts and transactions have been eliminated. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP") requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. The COVID-19 pandemic has caused significant, unprecedented disruption around the world that has affected daily living and negatively impacted the global economy. The effects of the COVID-19 pandemic may meaningfully impact significant estimates such as the allowance for loan losses, goodwill, mortgage servicing rights, and pension plan obligations and related expenses. Additionally, the pandemic may particularly impact certain loan concentrations in the hotel and accommodations, restaurant and food service, and strip shopping center industries. Reclassifications Certain prior year amounts have been reclassified to conform with the current presentation. These reclassifications had no impact on net income or shareholders' equity. Restrictions on Cash and Due from Banks The Corporation’s national bank subsidiary, The Park National Bank ("PNB"), previously was required to maintain average reserve balances with the Federal Reserve Bank of Cleveland. The Federal Reserve Board announced on March 15, 2020 that the Board reduced reserve requirement ratios to zero percent effective March 26, 2020. This action eliminated reserve requirements for all depository institutions. The average required reserve balance was approximately $89.2 million at December 31, 2019. No other compensating balance arrangements were in existence at December 31, 2020. Investment Securities Debt securities are classified upon acquisition into one of three categories: HTM, AFS, or trading (see Note 5 - Investment Securities). HTM securities are those debt securities that the Corporation has the positive intent and ability to hold to maturity and are recorded at amortized cost. AFS securities are those debt securities that would be available to be sold in the future in response to the Corporation’s liquidity needs, changes in market interest rates, and asset-liability management strategies, among other reasons. AFS securities are reported at fair value, with unrealized holding gains and losses excluded from earnings but included in other comprehensive income (loss), net of applicable income taxes. The Corporation did not hold any trading securities during any period presented. Equity securities, included within "Other investment securities" on the Consolidated Balance Sheets, are carried at fair value, with changes in fair value reported in net income. Equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment. Debt securities are evaluated quarterly for potential other-than-temporary impairment. Management considers the facts related to each security including the nature of the security, the amount and duration of the loss, the credit quality of the issuer, the expectations for that security’s performance and whether Park intends to sell, or it is more likely than not that Park will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. Declines in the value of debt securities that are considered to be other-than-temporary are separated into (1) the amount of the total impairment related to credit loss and (2) the amount of the total 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), net of income tax. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. Interest income from investment securities includes amortization of purchase premium or discount. Premiums and discounts on investment securities are amortized on the level-yield method without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Gains and losses realized on the sale of investment securities are recorded on the trade date and determined using the specific identification method. Federal Home Loan Bank and Federal Reserve Bank of Cleveland Stock PNB is a member of the FHLB and the FRB. Members are required to own a certain amount of stock based on their level of borrowings and other factors and may invest in additional amounts. FHLB stock and FRB stock are classified as restricted securities and are carried at their redemption value within "Other investment securities" on the Consolidated Balance Sheets. Impairment is evaluated based on the ultimate recovery of par value. Both cash and stock dividends are reported as income. Bank Owned Life Insurance Park has purchased insurance policies on the lives of directors and certain key officers. Bank owned life insurance is recorded at its cash surrender value (or the amount that can be realized). Loans Held for Sale Park has elected the fair value option for mortgage loans held for sale, which are carried at their fair value as of each balance sheet date. Mortgage Banking Derivatives Commitments to fund mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of these mortgage loans are accounted for as free standing derivatives. The fair value of the interest rate lock is recorded at the time the commitment to fund the mortgage loan is executed and is adjusted for the expected exercise of the commitment before the loan is funded. In order to hedge the change in interest rates resulting from its commitments to fund the loans, the Company enters into forward commitments for the future delivery of mortgage loans when interest rate locks are entered into. Fair value of these mortgage derivatives is estimated based on the change in mortgage interest rates from the date the interest on the loan is locked. The fair value of these derivatives is included in "Loans" in the Consolidated Balance Sheets. Changes in the fair values of these derivatives are included in "Other service income" in the Consolidated Statements of Income. Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff, are reported at their outstanding principal balances adjusted for any charge-offs, any nonaccrual interest payments applied to principal, any deferred fees or costs on originated loans, and any unamortized premiums or discounts on purchased loans. Interest income is accrued on the unpaid principal balance. Late charges on loans are recognized as income when they are collected. Net loan origination fees and costs are deferred and recognized in interest income using the level-yield method without anticipating prepayments. Commercial loans include: (1) commercial, financial and agricultural loans; (2) commercial real estate loans; (3) those commercial loans in the construction real estate loan segment; (4) those commercial loans in the residential real estate loan segment; and (5) leases. Consumer loans include: (1) mortgage and installment loans included in the construction real estate segment; (2) mortgage, home equity lines of credit ("HELOCs"), and installment loans included in the residential real estate segment; and (3) all loans included in the consumer segment. Generally, commercial loans are placed on nonaccrual status at 90 days past due and consumer and residential mortgage loans are placed on nonaccrual status at 120 days past due. The delinquency status of a loan is based on contractual terms and not on how recently payments have been received. Commercial loans placed on nonaccrual status are considered impaired (see Note 6 - Loans). Park’s charge-off policy for commercial loans requires management to establish a specific reserve or record a charge-off when collection is in doubt or it is probable a loss has been incurred and there is, or likely will be, a collateral shortfall related to the estimated value of the collateral securing the loan. The Company’s charge-off policy for consumer loans is dependent on the class of the loan. Residential mortgage loans, HELOCs, and consumer loans secured by residential real estate are typically charged down to the value of the collateral, less estimated selling costs, at 180 days past due. The charge-off policy for other consumer loans, primarily installment loans, requires a monthly review of delinquent loans and a complete charge-off for any account that reaches 120 days past due. For loans which are on nonaccrual status, it is Park’s policy to reverse interest previously accrued on the loans against interest income. Interest on such loans may be recorded on a cash basis and be included in earnings only when Park expects to receive the entire recorded investment of the loan. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. A description of each segment of the loan portfolio, along with the risk characteristics of each segment, is included below: Commercial, financial and agricultural: Commercial, financial and agricultural ("C&I") loans are made for a wide variety of general corporate purposes, including financing for commercial and industrial properties, financing for equipment, inventory and accounts receivable, acquisition financing, commercial leasing, and to consumer finance companies. The term of each commercial loan varies by its purpose. Repayment terms are structured such that commercial loans will be repaid within the economic useful life of the underlying asset. Risk of loss on C&I loans largely depends upon general economic cycles, as they may adversely impact certain industries, competency of the borrower's management team, the quality of the underlying assets supporting the loans including accounts receivable, inventory, and equipment, and the accuracy of the borrower's financial reporting. Such risks are mitigated by generally requiring the borrower's owners to guaranty the loans. Commercial real estate: Commercial real estate (“CRE”) loans include mortgage loans to developers and owners of commercial real estate. The lending policy for CRE loans is designed to address the unique risk attributes of CRE lending. The collateral for these CRE loans is the underlying commercial real estate. Risk of loss on CRE loans largely depends upon the cash flow of the properties which is influenced by the amount of vacancy experienced by the underlying real estate, the credit capacity of the tenants occupying the underlying real estate, and general economic trends as they may adversely impact the value of the property. These risks are mitigated by generally requiring personal guaranties of the owners of the properties and by requiring appraisals pursuant to government regulations. Construction real estate : The Company defines construction loans as both commercial construction loans and residential construction loans where the loan proceeds are used exclusively for the improvement of real estate as to which the Company holds a mortgage. Construction loans may be in the form of a permanent loan or a short-term construction loan, depending on the needs of the individual borrower. Construction financing is generally considered to involve a higher degree of risk of loss than long-term financing on improved, occupied real estate. Risk of loss on a construction loan depends largely upon the accuracy of the initial estimate of the property’s value at completion of construction and the estimated cost (including interest) of construction. If the estimate of construction cost proves to be inaccurate, Park may be required to advance funds beyond the amount originally committed to permit completion of the project. If the estimate of value proves inaccurate, Park may be confronted, at or prior to the maturity of the loan, with a project having a value insufficient to assure full repayment, should the borrower default. In the event that a default on a construction loan occurs and foreclosure follows, Park must take control of the project and attempt to either arrange for completion of construction or dispose of the unfinished project. Additional risk exists with respect to loans made to developers who do not have a buyer for the property, as the developer may lack funds to pay the loan if the property is not sold upon completion. Park attempts to reduce such risks on loans to developers by generally requiring personal guarantees and reviewing current personal financial statements and tax returns as well as other projects undertaken by the developer. Residential real estate: The Company defines residential real estate loans as first mortgages on individuals’ primary residences or second mortgages of individuals’ primary residences in the form of HELOCs or installment loans. Credit approval for residential real estate loans requires demonstration of sufficient income to repay the principal and interest and the real estate taxes and insurance, stability of employment, an established credit record and a current independent third-party appraisal providing the market value of the real estate securing the loan. Residential real estate loans typically have longer terms and higher balances with lower yields as compared to consumer loans, but generally carry lower risks of default. The Dodd-Frank Wall Street Reform and Consumer Protection Act requires creditors to make a reasonable and good faith determination of a consumer's ability to repay any consumer credit transaction secured by a dwelling. Documentation and verification of income within defined time frames and not-to-exceed limits are bases for affirming ability to repay. Risk of loss largely depends upon factors affecting the borrower's ability to repay as well as the general economic trends as they may adversely impact the value of the property. These risks are mitigated by completing a comprehensive underwriting of the borrower and by requiring appraisals pursuant to government regulations. Consumer: The Company originates direct and indirect consumer loans, primarily automobile loans, to customers in its primary market areas. Credit approval for consumer loans requires income sufficient to repay principal and interest due, stability of employment, an established credit record and sufficient collateral for secured loans. Consumer loans typically have shorter terms and lower balances with higher yields as compared to real estate mortgage loans, but generally carry higher risks of default. Consumer loan collections are dependent on the borrower’s financial stability, and thus are more likely to be affected by adverse personal circumstances. Leases : The Company originates financing leases primarily for the purchase of commercial vehicles, operating/manufacturing equipment, and municipal vehicles/equipment. Repayment terms are structured such that the lease will be repaid within the economic useful life of the leased asset. Risk of losses on financing leases largely depends upon general economic cycles, as they may adversely impact certain industries, competency of the borrower’s management team, the quality and residual value of the leased asset, and the accuracy of the borrower’s financial reporting. These risks are mitigated by underwriting leases considering primary and secondary sources of repayment and requiring guaranteed residual values. Concentration of Credit Risk Park's commercial loan portfolio includes loans to a wide variety of corporations and businesses across many industrial classifications in the 26 Ohio counties, three North Carolina counties, four South Carolina counties and one Kentucky county where PNB operates, with the exception of nationwide aircraft loans and nationwide asset-based lending to consumer finance companies. The primary industries represented by these customers include real estate rental and leasing, finance and insurance, construction, agriculture, forestry, fishing and hunting, manufacturing, retail trade, health care, accommodation and food services and other services. Purchased Credit Impaired Loans The Company has purchased loans, some of which have shown evidence of credit deterioration since origination. These PCI loans are recorded at fair value at inception, such that there is no carryover of the sellers' allowance for loan losses. After acquisition, losses are recognized by an increase in the allowance for loan losses. PCI loans are accounted for individually or aggregated into pools of loans based on common characteristics. The Company estimates the amount and timing of expected cash flows for each loan or pool and the expected cash flows in excess of the amount paid is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s or pool's contractual principal and interest over expected cash flows is not recorded (nonaccretable difference). Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded as a provision for loan losses. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income. Allowance for Loan Losses The allowance for loan losses is that amount believed adequate to absorb probable incurred credit losses in the loan portfolio based on management’s evaluation of various factors. The determination of the allowance requires significant estimates, including the timing and amounts of expected cash flows on impaired loans, consideration of current economic conditions, and historical loss experience pertaining to pools of homogeneous loans, all of which may be susceptible to change. The allowance is increased through a provision for loan losses that is charged to earnings based on management’s quarterly evaluation of the factors previously mentioned and is reduced by charge-offs, net of recoveries. The allowance for loan losses includes both (1) an estimate of loss based on historical loss experience within both commercial and consumer loan categories with similar characteristics (“statistical allocation”) and (2) an estimate of loss based on an impairment analysis of each commercial loan that is considered to be impaired (“specific allocation”). Included in the statistical allocation is a reserve for TDRs within the consumer loan portfolio. Management performs a periodic evaluation to ensure the reserve calculated utilizing the statistical allocation is consistent with a reserve calculated under Accounting Standards Codification ("ASC") 310-10 - Receivables . In calculating the allowance for loan losses, management believes it is appropriate to consider historical loss rates that are comparable to the current period being analyzed, giving consideration to losses experienced over a full cycle. As such, a year is added to the look back period each time historical losses are updated, until the economic cycle is complete, as defined by a period of rising charge-offs, considering both internal and industry trends. In updating the historical loss rates to incorporate 2020 losses, management considered if the economic deterioration as a result of the COVID-19 pandemic represented the end of a cycle for the purposes of the allowance for loan loss calculation, but, due to the historically low level of charge-offs, determined 2020 should be included in the cycle beginning in 2010. For the historical loss factor at December 31, 2020, the Company utilized an annual loss rate (“historical loss experience”), calculated based on an average of the net charge-offs and the annual change in specific reserves for impaired commercial loans, experienced during 2010 through 2020 within the individual segments of the commercial and consumer loan categories. U.S. GAAP requires a specific allocation to be established as a component of the allowance for loan losses for certain loans when it is probable that all amounts due pursuant to the contractual terms of the loans will not be collected, and the recorded investment in the loans exceeds their measure of impairment. Management considers the following related to commercial loans when determining if a loan should be considered impaired : (1) current debt service coverage levels of the borrowing entity; (2) payment history over the most recent 12-month period; (3) other signs of deterioration in the borrower’s financial situation, such as changes in credit scores; and (4) global cash flows of financially sound guarantors that have previously supported loan payments. The recorded investment is the balance of the loan, plus accrued interest receivable. Impairment is measured using either the present value of expected future cash flows based upon the initial effective interest rate on the loan, or the fair value of the collateral. If a loan is considered to be collateral dependent, the fair value of collateral, less estimated selling costs, is used to measure impairment. Loans acquired as part of the acquisition of NewDominion Bank were recorded at fair value on the date of acquisition, July 1, 2018. Loans acquired as part of the acquisition of Carolina Alliance Bank were recorded at fair value on the date of acquisition, April 1, 2019. An allowance is only established on acquired NewDominion Bank loans and Carolina Alliance Bank loans as a result of credit deterioration post acquisition. As of December 31, 2020, there was a $678,000 allowance related to performing acquired NewDominion Bank loans and Carolina Alliance Bank loans. Troubled Debt Restructurings ("TDRs") Management classifies loans as TDRs when a borrower is experiencing financial difficulty and Park has granted a concession. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of the borrower's debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. Management’s policy is to modify loans by extending the term or by granting a temporary or permanent contractual interest rate below the market rate, not by forgiving debt. A court's discharge of a borrower's debt in a Chapter 7 bankruptcy is considered a concession when the borrower does not reaffirm the discharged debt. Additionally, Park is working with borrowers impacted by the COVID-19 pandemic and providing modifications to include either interest only deferral or principal and interest deferral, in each case, for initial periods up to 90 days. As necessary, Park is making available a second 90-day interest only deferral or principal and interest deferral bringing the total potential deferral period to six months. A majority of these modifications are excluded from TDR classification under Section 4013 of the CARES Act or under applicable interagency guidance of the federal banking regulators. In accordance with this guidance, such modified loans will be considered current and will continue to accrue interest during the deferral period. TDRs are measured at the present value of estimated future cash flows using the loan’s effective rate at inception, or if a TDR is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. Commercial TDRs are separately identified for impairment disclosures. Premises and Equipment Land is carried at cost and is not subject to depreciation. Premises and equipment are carried at cost, less accumulated depreciation and amortization. Depreciation is generally provided on the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the remaining lease period or the estimated useful lives of the improvements. Upon the sale or other disposal of an asset, the cost and related accumulated depreciation are removed from the accounts and the resulting gain or loss is recognized. Maintenance and repairs are charged to expense as incurred while renewals and improvements that extend the useful life of an asset are capitalized. Premises and equipment are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of a particular asset may not be recoverable. The range of depreciable lives over which premises and equipment are being depreciated are: Buildings 30 Years Building improvements 5 to 10 Years Equipment, furniture and fixtures 3 to 12 Years Leasehold improvements Shorter of the remaining lease period or the estimated useful life of the improvement Other Real Estate Owned Management transfers a loan to OREO at the time that Park takes deed/title to the asset. OREO is initially recorded at fair value less anticipated selling costs (net realizable value), establishing a new cost basis, and consists of property acquired through foreclosure and real estate held for sale. If the net realizable value is below the carrying value of the loan at the date of transfer, the difference is charged to the allowance for loan losses. These assets are subsequently accounted for at the lower of cost or fair value less costs to sell. Subsequent changes in the value of real estate are classified as OREO valuation adjustments, are reported as adjustments to the carrying amount of OREO and are recorded within “Other income”. In certain circumstances where management believes the devaluation may not be permanent in nature, Park utilizes a valuation allowance to record OREO devaluations, which is also expensed through “Other income”. Costs relating to development and improvement of such properties are capitalized (not in excess of fair value less estimated costs to sell) and costs relating to holding the properties are charged to "Other expense". Foreclosed Assets Foreclosed assets include non-real estate assets where Park, as creditor, has received physical possession of a borrower’s assets, regardless of whether formal foreclosure proceedings take place. Additionally, TDRs in which Park obtains one of more of the debtor’s non-real estate assets in place of all or part of the receivable are accounted for as foreclosed assets. Foreclosed assets are initially recorded as fair value less costs to sell when acquired, establishing a new cost basis. Operating costs after acquisition are expensed as incurred. As of December 31, 2020 and 2019, Park had $3.6 million and $4.2 million, respectively, of foreclosed assets included within “Other assets.” Mortgage Servicing Rights When Park sells mortgage loans with servicing retained, MSRs are recorded at fair value with the income statement effect recorded in "Other service income." Capitalized MSRs are amortized in proportion to and over the period of the estimated future servicing income of the underlying loan and are included within “Other service income”. MSRs are assessed for impairment quarterly, based on fair value, with any impairment recognized through a valuation allowance. The fair value of MSRs is determined by discounting estimated future cash flows from the servicing assets, using market discount rates and expected future prepayment rates. In order to calculate fair value, the sold loan portfolio is stratified into homogeneous pools of like categories. (See Note 26 - Loan Servicing.) Fees received for servicing mortgage loans owned by investors are based on a percentage of the outstanding monthly principal balance of such loans and are included in income as loan payments are received. The amortization of MSRs is netted against loan servicing fee income, recorded in "Other service income". Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over net identifiable tangible and intangible assets acquired in a purchase business combination. Goodwill is not amortized to expense, but is subject to impairment tests annually, or more frequently, if events or changes in circumstances indicate that the asset might be impaired, by assessing qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing these events or circumstances, it is concluded that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then the performance of additional analysis is unnecessary. If the carrying amount of the goodwill exceeds the fair value, an impairment charge must be recorded in an amount equal to the excess, not to exceed the total goodwill allocated to the reporting unit. Park evaluates goodwill for impairment on April 1 of each year, with financial data as of March 31. Based on the qualitative analysis performed as of April 1, 2020, the Company determined that goodwill for PNB was not impaired. During each of the second, third and fourth quarters of 2020, management determined that the deterioration in general economic conditions as a result of the COVID-19 pandemic and responses thereto represented a triggering event prompting an evaluation of goodwill for impairment. Based on the qualitative analysis performed during each of the second, third and fourth quarters of 2020, the Company determined that goodwill was not impaired. Management continues to monitor economic factors to evaluate goodwill impairment. (See Note 8 - Goodwill and Other Intangible Assets and Note 30 - Segment Information for operating segment results.) Other intangible assets consist of core deposit intangibles and a trade name intangible. Core deposit intangibles are amortized on an accelerated basis over a period of ten years. The trade name intangible when initially recorded, assumed an indefinite useful life. During 2019, the trade name intangible was deemed impaired, and a $1.3 million charge was recorded in "other expense". (See Note 8 - Goodwill and Other Intangible Assets.) Consolidated Statements of Cash Flows Cash and cash equivalents include cash and cash items, amounts due from banks and money market instruments. Generally, money market instruments are purchased and sold for one-day periods. Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there now are such matters that will have a material effect on the financial statements. Income Taxes The Corporation accounts for income taxes using the asset and liability approach. Under this method, deferred tax assets and deferred tax liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. To the extent that Park does not consider it more likely than not that a deferred tax asset will be recovered, a valuation allowance is recorded. All positive and negative evidence is reviewed when determining how much of a valuation allowance is recognized on a quarterly basis. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. An uncertain tax position is recognized as a benefit only if it is “more-likely-than-not” that the tax position would be sustained in a tax examination being presumed to occur. The benefit recognized for a tax position that meets the “more-likely-than-not” criteria is measured based on the largest benefit that is more than 50 percent likely to be realized, taking into consideration the amounts and pr

Adoption of New Accounting Pron

Adoption of New Accounting Pronouncements and Issued Not Yet Effective Accounting Standards	12 Months Ended
	Dec. 31, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	Adoption of New Accounting Pronouncements and Issued But Not Yet Effective Accounting Standards The following is a summary of new accounting pronouncements impacting Park's consolidated financial statements, and accounting standards that have been issued but are not effective for Park as of December 31, 2020: Adoption of New Accounting Pronouncements ASU 2018-13 - Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement: In August 2018, the FASB issued ASU 2018-13 - Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . This ASU modifies the disclosure requirements for fair value measurements in Topic 820, Fair Value Measurement by removing, modifying and adding certain requirements. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The adoption of this guidance on January 1, 2020 did not have an impact on Park’s consolidated financial statements, but did impact disclosures. ASU 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting: In March 2020, the FASB issued ASU 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting . This ASU provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU are effective from March 12, 2020 through December 31, 2022. The adoption of this guidance did not have a material impact on Park's consolidated financial statements, but Park will consider this guidance as contracts are transitioned from LIBOR to another reference rate. ASU 2021-01 - Reference Rate Reform (Topic 848): Scope: In January 2021, the FASB issued ASU 2021-01 - Reference Rate Reform (Topic 848): Scope . This ASU clarifies the scope of Topic 848 so that derivatives affected by the discounting transition are explicitly eligible for certain optional expedients and exceptions in Topic 848. The amendments in this ASU are elective and apply to all entities that have derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The amendments in this ASU are effective immediately for all entities. The adoption of this guidance did not have a material impact on Park's consolidated financial statements, but Park will consider this guidance as contracts are transitioned from LIBOR to another reference rate. Issued But Not Yet Effective Accounting Standards ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments: In June 2016, the FASB issued ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The new accounting guidance in this ASU replaces the incurred loss methodology with an expected loss methodology, which is referred to as the current expected credit loss ("CECL") methodology. The CECL methodology is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables, HTM debt securities, and reinsurance receivables. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor. The CECL methodology requires an entity to estimate credit losses over the life of an asset or off-balance sheet credit exposure. The new accounting guidance was to have been effective for Park for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2019. Section 4014 of the CARES Act provided financial institutions with optional temporary relief from having to comply with ASU 2016-13 ("Measurement of Credit Losses on Financial Instruments") including the CECL methodology for estimating the allowance for credit losses. This temporary relief was set to expire on the earlier of the date on which the national emergency concerning COVID-19 terminated or December 31, 2020, with adoption being effective retrospectively as of January 1, 2020. Section 540 of the Consolidated Appropriations Act, 2021, amended Section 4014 of the CARES Act by extending the relief period provided in the CARES Act. The Consolidated Appropriations Act, 2021, modifies the CARES Act so that the temporary relief will expire on the earlier of the first day of the fiscal year that begins after the date on which the national emergency concerning COVID-19 terminates or January 1, 2022. Park elected to delay the implementation of CECL following the approval of the CARES Act. The CECL standard requires financial institutions to calculate an allowance utilizing a reasonable and supportable forecast period which Park has established as a one-year period. In the unprecedented circumstances surrounding the COVID-19 pandemic and the response thereto, Park believes that adopting the CECL methodology in the first quarter of 2020 would have added an unnecessary level of subjectivity and volatility to the calculation of the allowance for credit losses. With the approval of the Consolidated Appropriations Act, 2021, management has elected to further delay adoption of CECL to January 1, 2021. This will allow Park to utilize the CECL standard for the entire year of adoption. Park formed a cross-functional CECL Committee and engaged a third party vendor to assist with the adoption of ASU 2016-13. The Company currently intends to use a blend of multiple economic forecasts to estimate expected credit losses over a one year reasonable and supportable forecast period and then revert, over a one year period to longer term historical loss experience to arrive at lifetime expected losses. Based on preliminary modeling results, management estimates that the reserve will increase to between $90 million and $100 million upon adoption, with the day 1 increase being recorded through a one-time cumulative-effect adjustment to retained earnings as of January 1, 2021. The actual impact from adopting this guidance may be subject to change based upon refinement and finalization of the model and associated assumptions, the refinement and finalization of qualitative factors, the implementation and testing of certain internal controls ensuring model effectiveness and management's judgment. Park expects the Allowance for Credit Losses for unfunded commitments to increase to between $3.5 million and $4.5 million upon adoption of ASU 2016-13, with the day 1 increase being recorded through a one-time cumulative-effect adjustment to retained earnings as of January 1, 2021. At adoption, Park did not have any securities classified as HTM debt securities. No allowance was recorded related to AFS debt securities at the date of adoption, January 1, 2021. While it is expected that the adoption of ASU 2016-13 will increase the allowance for credit losses, many factors will determine the ultimate calculation at January 1, 2021. The adoption of ASU 2016-13 will not, however, change the overall credit risk in the Company's loan, lease and investment securities portfolios or the ultimate losses with respect thereto. The transition adjustment to increase the allowance will primarily result in a decrease to shareholders' equity, net of income taxes. The ultimate impact of the adoption of ASU 2016-13 will depend on the composition of the loan, lease and investment securities portfolios, finalization of credit loss models, and macroeconomic conditions and forecasts that exist at the date of adoption. ASU 2018-14 - Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans: In August 2018, 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 . The amendments in this ASU modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing disclosures that are no longer considered cost beneficial, clarifying the specific requirements of disclosures and adding disclosure requirements identified as relevant. The amendments in ASU 2018-14 are effective for fiscal years ending after December 15, 2020. The adoption of this guidance on January 1, 2021 did not have an impact on Park’s consolidated financial statements, but will impact disclosures. ASU 2018-19 - Codification Improvements to Topic 326, Financial Instruments - Credit Losses: In November 2018, the FASB issued ASU 2018-19 - Codification Improvements to Topic 326, Financial Instruments - Credit Losses. The amendment in ASU 2018-19 clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20. Impairment of receivables arising from operating leases are to be accounted for in accordance with Topic 842, Leases. Park will consider this clarification in determining the appropriate adoption of ASU 2016-13. ASU 2019-04 - Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments: In April 2019, the FASB issued ASU 2018-19 - Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. ASU 2019-04 includes amendments that clarify or address specific issues about certain aspects of the amendments in ASU 2016-01, Financial Instruments - Overall (Subtopic 925-10): Recognition and Measurement of Financial Assets and Financial Liabilities, ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, and ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. Park has already adopted ASU 2016-01. As a result, certain provisions in the amendments within ASU 2019-04 related to the same topics as ASU 2016-01 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The adoption of the provisions related to the same topics as ASU 2016-01 on January 1, 2020, did not have a material effect on Park's consolidated financial statements. For the amendments related to Topic 326 that clarify or address specific aspects of ASU 2016-13, Park will consider these clarifications in determining the appropriate adoption of ASU 2016-13. Park has already adopted ASU 2017-12. As a result, the amendments within ASU 2019-04 were effective as of January 1, 2020. This ASU allows entities, like Park, that did not reclassify debt securities from HTM to AFS upon the adoption of ASU 2017-12 to reclassify these securities as of the adoption of ASU 2019-04. Park considered this option and, effective September 1, 2019, reclassified all HTM debt securities to AFS. The transfer occurred at fair value and resulted in an unrealized gain, net of taxes, of $19.1 million being recorded in other comprehensive income. ASU 2019-05 - Financial Instruments - Credit Losses (Topic 326): In May 2019, the FASB issued ASU 2019-05 - Financial Instruments - Credit Losses (Topic 326). The amendments in this ASU provide entities that have certain instruments within the scope of Subtopic 326-20, Financial Instruments - Credit Losses - Measured at Amortized Cost, with an option to irrevocably elect the fair value option in Subtopic 825-10, Financial Instruments - Overall, applied on an instrument-by-instrument basis for eligible instruments, upon adoption of Topic 326. Park will consider this amendment in determining the appropriate adoption of ASU 2016-13. ASU 2019-11 - Codification Improvements to Topic 326, Financial Instruments - Credit Losses: In November 2019, the FASB issued ASU 2019-11 - Codification Improvements to Topic 326, Financial Instruments - Credit Losses . ASU 2019-11 represents changes to clarify, correct errors in, or improve the ASC related to five topics. The amendments make the ASC easier to understand and easier to apply by eliminating inconsistencies and providing clarifications. Park will consider these clarifications and improvements in determining the appropriate adoption of ASU 2016-13. ASU 2019-20 - Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes: In December 2019, the FASB issued ASU 2019-20 - Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes . ASU 2019-20 includes amendments to simplify accounting for income taxes by removing certain exceptions and adding requirements with the intention of simplifying and clarifying existing guidance. The amendments in ASU 2019-20 are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The adoption of this guidance on January 1, 2021, did not have a material impact on Park's consolidated financial statements. ASU 2020-01 - Investments - Equity Securities (Topic 321), Investments - Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321, Topic 323, and Topic 815: In January 2020, the FASB issued ASU 2020-01 - Investments - Equity Securities (Topic 321), Investments - Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 . ASU 2020-01 represents changes to clarify certain interactions between the guidance to account for certain equity securities under Topic 321, the guidance to account for investments under the equity method of accounting in Topic 323, and the guidance in Topic 815. These amendments improve current U.S. GAAP by reducing diversity in practice and increasing comparability of the accounting for these transactions. The amendments in ASU 2020-01 are effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. The adoption of this guidance on January 1, 2021 did not have a material impact on Park's consolidated financial statements. ASU 2020-02 - Financial Instruments - Credit Losses (Topic 326) and Leases (Topic 842) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842): In February 2020, the FASB issued ASU 2020-02 - Financial Instruments - Credit Losses (Topic 326) and Leases (Topic 842) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842) . ASU 2020-02 represents changes to clarify or improve the ASC. The amendments make the ASC easier to understand and easier to apply by eliminating inconsistencies and providing clarifications. It also addresses transition and open effective date information for Topic 842. Park will consider these clarifications and improvements in determining the appropriate adoption of ASU 2016-13. ASU 2020-03 - Codification Improvements to Financial Instruments: In March 2020, the FASB issued ASU 2020-03 - Codification Improvements to Financial Instruments . ASU 2020-03 represents changes to clarify or improve the ASC related to seven topics. The amendments make the ASC easier to understand and easier to apply by eliminating inconsistencies and providing clarifications. Issues 1, 2, 3, 4 and 5 are conforming amendments and for public entities were effective upon the issuance of the standard. Issues 6 and 7 are amendments that affect the guidance in ASU 2016-13. Park will consider these clarifications and improvements in determining the appropriate adoption of ASU 2016-13. ASU 2020-08 - Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs: In October 2020, the FASB issued ASU 2020-08 - Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs. ASU 2020-08 clarifies that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-35-33 for each reporting period. The amendments in ASU 2020-08 are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early application was not permitted. The adoption of this guidance on January 1, 2021, did not have a material impact on Park's consolidated financial statements.

Organization

Organization	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Park National Corporation is a financial holding company headquartered in Newark, Ohio. Through PNB, Park is engaged in a general commercial banking and trust business, primarily in Ohio, Kentucky, North Carolina, and South Carolina, with the exception of nationwide aircraft loans and nationwide asset-based lending to consumer finance companies. PNB is headquartered in Newark, Ohio. A wholly-owned subsidiary of Park, GFSC is a consumer finance company located in Central Ohio. Through February 16, 2012, Park operated a second banking subsidiary, Vision Bank ("Vision"), which was engaged in a general commercial banking business, primarily in Baldwin County, Alabama and the panhandle of Florida. Promptly following the sale of the Vision business to Centennial Bank (a wholly-owned subsidiary of Home BancShares, Inc.), Vision surrendered its Florida banking charter to the Florida Office of Financial Regulation and became a non-bank Florida corporation. Vision (the Florida corporation) merged with and into a wholly-owned, non-bank subsidiary of Park, SEPH, with SEPH being the surviving entity. SEPH holds the remaining assets and liabilities retained by Vision subsequent to the sale. SEPH also holds OREO that had previously been transferred to SEPH from Vision. SEPH's assets consist primarily of nonperforming loans and OREO. This non-bank subsidiary represents a run off portfolio of the legacy Vision assets. PNB provides the following principal services: the acceptance of deposits for demand, savings and time accounts; commercial, industrial, consumer and real estate lending, including installment loans, credit cards (which are largely offered through a third party), home equity lines of credit and commercial leasing; trust and wealth management services; cash management; safe deposit operations; electronic funds transfers and a variety of additional banking-related services. See Note 30 - Segment Information for financial information on the Corporation’s operating segments.

Business Combination

Business Combination	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Business Combination	Business Combinations CAB Financial Corporation On April 1, 2019, CAB Financial Corporation, a South Carolina corporation, merged with and into Park, with Park continuing as the surviving entity pursuant to the Agreement and Plan of Merger and Reorganization (the "CABF Merger Agreement"), dated as of September 12, 2018, by and between Park and CABF. Immediately following the CABF merger into Park, Carolina Alliance Bank, a South Carolina state-chartered bank and a wholly-owned subsidiary of CABF, was merged with and into PNB, with PNB as the surviving bank. In accordance with the CABF Merger Agreement, CABF shareholders were to receive for each share of their CABF common stock (i) $3.80 in cash (the cash consideration) and (ii) 0.1378 of a Park common share (the stock consideration). CABF stock options and restricted stock awards were fully vested (with any performance-based vesting condition deemed satisfied) and canceled and converted automatically into the right to receive merger consideration. Purchase consideration consisted of 1,037,205 Park common shares, valued at $98.3 million, and $28.6 million in cash to acquire 100% of CABF's outstanding shares of common stock. The acquisition is expected to provide additional revenue growth and geographic diversification. Carolina Alliance's results of operations were included in Park's results beginning April 1, 2019. For the years ended December 31, 2020 and 2019, Park recorded merger-related expenses of $603,000 and $8.8 million, respectively, associated with the Carolina Alliance acquisition. Goodwill of $46.9 million arising from the acquisition consisted largely of synergies and the cost savings resulting from the combining of the operations of PNB and Carolina Alliance. The goodwill is not deductible for income tax purposes as the transaction was accounted for as a tax-free exchange. The following table summarizes the consideration paid for Carolina Alliance and the amounts of the assets acquired and liabilities assumed at their fair value: (in thousands) Consideration Cash $ 28,630 Park common shares 98,275 Fair value of total consideration transferred $ 126,905 Recognized amounts of identifiable assets acquired and liabilities assumed Cash and cash equivalents $ 23,799 Securities 97,606 Loans 578,577 Premises and equipment 8,337 Core deposit intangibles 8,207 Other assets 32,123 Total assets acquired $ 748,649 Deposits $ 632,649 Other liabilities 35,951 Total liabilities assumed 668,600 Net identifiable assets 80,049 Goodwill $ 46,856 Park accounted for the Carolina Alliance acquisition using the acquisition method of accounting and accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the acquisition date, in accordance with FASB ASC Topic 805, Business Combinations. The fair value of net assets acquired includes fair value adjustments to loans that were not considered impaired as of the acquisition date. The fair value adjustments were determined using discounted contractual cash flows. However, Park believes that all contractual cash flows related to these loans will be collected. As such, these loans were not considered impaired at the acquisition date and were not subject to the guidance relating to purchased credit impaired loans which have shown evidence of credit deterioration since origination. Loans acquired that were not subject to these requirements included non-impaired loans with a fair value and gross contractual amounts receivable of $560.2 million and $572.6 million, respectively, on the date of acquisition. The table below presents information with respect to the fair value of acquired loans as well as their book balance at the acquisition date. (in thousands) Book Balance Fair Value Commercial, financial and agricultural $ 80,895 $ 80,580 Commercial real estate 281,425 273,855 Construction real estate: Commercial 43,106 42,176 Mortgage 11,130 10,633 Residential real estate: Commercial 48,546 48,684 Mortgage 30,519 30,969 HELOC 40,825 39,853 Consumer 4,813 4,647 Leases 28,589 28,781 Purchased credit impaired 19,850 18,399 Total loans $ 589,698 $ 578,577 The following table presents supplemental pro forma information as if the Carolina Alliance acquisitions had occurred as of January 1, 2018. The unaudited pro forma information includes adjustments for interest income on loans and securities acquired, amortization of intangibles arising from the respective transactions, depreciation expense on property acquired, interest expense on deposits acquired, and the related tax effects. The pro forma information is not necessarily indicative of the results of operations that would have occurred had the transactions been effected on the assumed date. Twelve months ended December 31, (dollars in thousands, except per share data) 2019 2018 Net interest income $ 304,540 $ 295,656 Net income 111,463 118,679 Basic earnings per share 6.76 7.18 Diluted earnings per share 6.72 7.12

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investments Securities	Investment Securities The amortized cost and fair value of investment securities are shown in the following tables. Management performs a quarterly evaluation of investment securities for any other-than-temporary impairment. During 2020, 2019 and 2018, there were no investment securities deemed to be other-than-temporarily impaired. Debt Securities Investment securities at December 31, 2020 and December 31, 2019 were as follows: (In thousands) Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value 2020: Debt Securities Available-for-Sale Obligations of states and political subdivisions $ 279,245 $ 25,973 $ — $ 305,218 U.S. Government sponsored entities’ asset-backed securities 726,589 26,248 728 752,109 Corporate debt securities 2,000 14 — 2,014 Total $ 1,007,834 $ 52,235 $ 728 $ 1,059,341 (In thousands) Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value 2019: Debt Securities Available-for-Sale Obligations of states and political subdivisions $ 302,928 $ 17,563 $ — $ 320,491 U.S. Government sponsored entities’ asset-backed securities 884,571 10,862 6,223 889,210 Total $ 1,187,499 $ 28,425 $ 6,223 $ 1,209,701 The following table provides detail on investment securities with unrealized losses aggregated by investment category and length of time the individual securities had been in a continuous loss position at December 31, 2020 and December 31, 2019: Less than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses 2020: Debt Securities Available-for-Sale U.S. Government sponsored entities' asset-backed securities $ 86,393 $ 695 $ 4,727 $ 33 $ 91,120 $ 728 Total $ 86,393 $ 695 $ 4,727 $ 33 $ 91,120 $ 728 Less than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses 2019: Debt Securities Available-for-Sale U.S. Government sponsored entities' asset-backed securities $ 237,613 $ 1,106 $ 171,805 $ 5,117 $ 409,418 $ 6,223 Total $ 237,613 $ 1,106 $ 171,805 $ 5,117 $ 409,418 $ 6,223 Management does not believe any individual unrealized loss as of December 31, 2020 or 2019 represented an other-than-temporary impairment. The unrealized loss on agency issued debt securities are primarily the result of interest rate changes. These conditions will not prohibit Park from receiving its contractual principal and interest payments on these debt securities. The fair value of these debt securities is expected to recover as payments are received on these securities and they approach maturity. Should the impairment of any of these securities become other-than-temporary, the cost basis of the investment will be reduced and the resulting loss attributable to credit will be recognized in net income in the period the other-than-temporary impairment is identified. The amortized cost and estimated fair value of investments in debt securities at December 31, 2020, are shown in the following table by contractual maturity, except for asset-backed securities, which are shown as a single total, due to the unpredictability of the timing in principal repayments. (In thousands) Amortized Cost Fair Value Tax Equivalent Yield (1) Debt Securities Available-for-Sale Corporate debt securities Due five through ten years $ 2,000 $ 2,014 4.00 % Obligations of states and political subdivisions Due five through ten years $ 66,449 $ 72,860 3.80 % Due greater than ten years 212,796 232,358 3.67 % Total $ 279,245 $ 305,218 3.70 % U.S. Government sponsored entities’ asset-backed securities $ 726,589 $ 752,109 2.14 % (1) The tax equivalent yield for obligations of states and political subdivisions includes the effects of a taxable equivalent adjustment using a 21% federal corporate income tax rate. At December 31, 2020, investment securities with an amortized cost of $329 million were pledged for government and trust department deposits, $349 million were pledged to secure repurchase agreements and $14 million were pledged as collateral for FHLB advance borrowings. At December 31, 2019, investment securities with an amortized cost of $370 million were pledged for government and trust department deposits, $197 million were pledged to secure repurchase agreements and $18 million were pledged as collateral for FHLB advance borrowings. At December 31, 2020, there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of shareholders’ equity. During 2020, Park sold certain AFS debt securities with a book value of $112.5 million at a gross loss of $64,000, and sold certain AFS debt securities with a book value of $196.4 million at a gross gain of $3.4 million. During 2019, Park sold certain AFS debt securities with a book value of $62.4 million at a gross loss of $692,000, and sold certain AFS debt securities with a book value of $29.1 million at a gross gain of $271,000. During 2018, Park sold certain AFS debt securities with a book value of $245.0 million at a gross loss of $2.6 million, sold certain AFS debt securities with a book value of $2.0 million at a gross gain of $60,000, and sold certain HTM debt securities with a book value of $7.4 million at a gross gain of $0.3 million. These HTM debt securities had been paid down by 96.3% of the principal outstanding at acquisition. On September 1, 2019, Park adopted the portion of ASU 2019-04 which allowed for a one-time reclassification of securities from HTM to AFS. On that date, Park transferred HTM securities with a fair value of $373.9 million to the AFS classification. The transfer occurred at fair value and had a related unrealized gain, net of taxes, of $19.1 million recorded in other comprehensive income. Other Investment Securities Other investment securities (as shown on the Consolidated Balance Sheets) consist of stock investments in the FHLB, the FRB, and equity securities. The FHLB and FRB restricted stock investments are carried at their redemption value. Equity securities with a readily determinable fair value are carried at fair value. Equity securities without a readily determinable fair value are recorded at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions ("modified cost"). Park's portfolio of equity investments in limited partnerships which provide mezzanine funding ("Partnership Investments") are valued using the net asset value practical expedient in accordance with ASC 820. The carrying amount of other investment securities at December 31, 2020 and 2019 was as follows: (In thousands) December 31, 2020 December 31, 2019 FHLB stock $ 22,090 $ 30,060 FRB stock 14,653 14,653 Equity investments carried at fair value 2,511 1,993 Equity investments carried at modified cost (1) 4,689 2,689 Equity investments carried at net asset value 21,522 20,411 Total other investment securities $ 65,465 $ 69,806 (1) There have been no impairments, downward adjustments, or upward adjustments made to equity investments carried at modified cost. During the year ended December 31, 2020, the FHLB repurchased 79,697 shares of FHLB stock with a book value of $8.0 million. No shares of FRB stock were purchased or sold in 2020. During the year ended December 31, 2019, the FHLB repurchased 133,281 shares of FHLB stock with a book value of $13.3 million. Additionally, during 2019, Park acquired Carolina Alliance's FHLB shares which were subsequently repurchased by the FHLB. Park purchased 128,553 shares of FRB stock with a book value of $6.4 million in 2019. For the years ended December 31, 2020, 2019 and 2018, $(239,000), $345,000 and $(287,000), respectively, of unrealized (losses) gains on equity investments carried at fair value were recorded within "Gain on equity securities, net" on the Consolidated Statements of Income. An additional $3.5 million gain recorded within "Gain on equity securities, net" on the Consolidated Statement of Income for the year ended December 31, 2018 relates to Park's 8.55% investment in NewDominion Bank which merged with Park National Bank on July 1, 2018. For the years ended December 31, 2020, 2019 and 2018, $2.4 million, $4.8 million and $1.4 million, respectively, of gains on equity investments carried at NAV were recorded within "Gain on equity securities, net" on the Consolidated Statements of Income.

Loans

Loans	12 Months Ended
	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The composition of the loan portfolio, by class of loan, as of December 31, 2020 and December 31, 2019 was as follows: 12/31/2020 12/31/2019 (In thousands) Loan Balance Accrued Interest Receivable Recorded Investment Loan Balance Accrued Interest Receivable Recorded Investment Commercial, financial and agricultural * $ 1,588,989 $ 6,528 $ 1,595,517 $ 1,185,110 $ 4,393 $ 1,189,503 Commercial real estate * 1,748,189 6,017 1,754,206 1,609,413 5,571 1,614,984 Construction real estate: Commercial 226,991 572 227,563 233,637 826 234,463 Mortgage 115,492 232 115,724 96,574 228 96,802 Installment 938 3 941 1,488 4 1,492 Residential real estate: Commercial 526,222 1,161 527,383 479,081 1,339 480,420 Mortgage 1,096,358 947 1,097,305 1,176,316 1,381 1,177,697 HELOC 182,028 647 182,675 224,766 1,113 225,879 Installment 8,436 22 8,458 12,563 32 12,595 Consumer 1,659,704 4,510 1,664,214 1,452,375 4,314 1,456,689 Leases 24,438 14 24,452 30,081 20 30,101 Total loans $ 7,177,785 $ 20,653 $ 7,198,438 $ 6,501,404 $ 19,221 $ 6,520,625 * Included within commercial, financial and agricultural loans and commercial real estate loans was an immaterial amount of consumer loans that were not broken out by class. In order to support customers, Park participated in the CARES Act Paycheck Protection Program ("PPP"), approving and funding 4,439 loans totaling $543.1 million under the PPP. Included within commercial, financial and agricultural loans are $337.1 million of PPP loans at December 31, 2020 . For its assistance in originating and retaining these loans, Park received an aggregate of $20.2 million in fees from the SBA. Of this $20.2 million of PPP fees, Park recognized $13.7 million during the year ended December 31, 2020 . Loans are shown net of deferred origination fees, costs and unearned income of $23.6 million at December 31, 2020 and of $16.3 million at December 31, 2019, which represented a net deferred income position in both years. At December 31, 2020, included in the net deferred origination fees, costs and unearned income of $23.6 million were $6.5 million in net origination fees related to PPP loans. At December 31, 2020 and December 31, 2019, loans included purchase accounting adjustments of $7.2 million and $11.7 million, respectively, which represented a net deferred income position at each date. This fair market value purchase accounting adjustment related to loans which are not PCI is expected to be recognized into interest income on a level yield basis over the remaining expected life of the loans. Overdrawn deposit accounts of $2.0 million and $2.2 million had been reclassified to loans at December 31, 2020 and December 31, 2019, respectively, and are included in the commercial, financial and agricultural loan class above. Credit Quality The following table presents the recorded investment in nonaccrual loans, accruing TDRs, and loans past due 90 days or more and still accruing by class of loan as of December 31, 2020 and December 31, 2019: 12/31/2020 (In thousands) Nonaccrual Loans Accruing TDRs Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 23,261 $ 5,619 $ — $ 28,880 Commercial real estate 67,426 2,931 377 70,734 Construction real estate: Commercial 3,110 — — 3,110 Mortgage — 30 — 30 Installment 14 1 — 15 Residential real estate: Commercial 4,304 253 — 4,557 Mortgage 14,016 8,400 416 22,832 HELOC 1,286 909 77 2,272 Installment 184 1,728 — 1,912 Consumer 2,172 1,017 724 3,913 Leases 1,595 — — 1,595 Total loans $ 117,368 $ 20,888 $ 1,594 $ 139,850 12/31/2019 (In thousands) Nonaccrual Loans Accruing TDRs Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 26,776 $ 6,349 $ 28 $ 33,153 Commercial real estate 39,711 2,080 625 42,416 Construction real estate: Commercial 453 — — 453 Mortgage 25 84 — 109 Installment 72 5 — 77 Residential real estate: Commercial 2,025 — — 2,025 Mortgage 15,271 8,826 1,209 25,306 HELOC 2,062 1,010 44 3,116 Installment 462 1,964 — 2,426 Consumer 3,089 980 645 4,714 Leases 134 — 186 320 Total loans $ 90,080 $ 21,298 $ 2,737 $ 114,115 The following table provides additional information regarding those nonaccrual and accruing TDR loans that are individually evaluated for impairment and those collectively evaluated for impairment as of December 31, 2020 and December 31, 2019. 12/31/2020 12/31/2019 (In thousands) Nonaccrual and Accruing TDRs Loans Individually Evaluated for Impairment Loans Collectively Evaluated for Impairment Nonaccrual and Accruing TDRs Loans Individually Evaluated for Impairment Loans Collectively Evaluated for Impairment Commercial, financial and agricultural $ 28,880 $ 28,836 $ 44 $ 33,125 $ 33,088 $ 37 Commercial real estate 70,357 70,357 — 41,791 41,791 — Construction real estate: Commercial 3,110 3,110 — 453 453 — Mortgage 30 — 30 109 — 109 Installment 15 — 15 77 — 77 Residential real estate: Commercial 4,557 4,557 — 2,025 2,025 — Mortgage 22,416 — 22,416 24,097 — 24,097 HELOC 2,195 — 2,195 3,072 — 3,072 Installment 1,912 — 1,912 2,426 — 2,426 Consumer 3,189 — 3,189 4,069 — 4,069 Leases 1,595 1,595 — 134 134 — Total loans $ 138,256 $ 108,455 $ 29,801 $ 111,378 $ 77,491 $ 33,887 All of the loans individually evaluated for impairment were evaluated using the fair value of the collateral or the present value of expected future cash flows as the measurement method. The following table presents loans individually evaluated for impairment by class of loan as of December 31, 2020 and December 31, 2019. 12/31/2020 12/31/2019 (In thousands) Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated With no related allowance recorded Commercial, financial and agricultural $ 23,316 $ 22,970 $ — $ 21,194 $ 21,010 $ — Commercial real estate 63,639 63,467 — 41,696 41,471 — Construction real estate: Commercial 3,110 3,110 — 453 453 — Residential real estate: Commercial 4,522 4,448 — 1,921 1,854 — Leases 568 568 — — — — With an allowance recorded Commercial, financial and agricultural 5,881 5,866 3,758 12,289 12,078 5,104 Commercial real estate 6,890 6,890 1,316 320 320 35 Construction real estate: Commercial — — — — — — Residential real estate: Commercial 109 109 16 171 171 42 Leases 1,027 1,027 344 134 134 49 Total $ 109,062 $ 108,455 $ 5,434 $ 78,178 $ 77,491 $ 5,230 Management’s general practice is to proactively charge down loans individually evaluated for impairment to the fair value of the underlying collateral. At December 31, 2020 and December 31, 2019, there were $0.6 million and $0.5 million, respectively, of partial charge-offs on loans individually evaluated for impairment with no related allowance recorded and $16,000 and $210,000, respectively, of partial charge-offs on loans individually evaluated for impairment that also had a specific reserve allocated. The allowance for loan losses included specific reserves related to loans individually evaluated for impairment at December 31, 2020 and 2019 of $5.4 million and $5.2 million, respectively. These loans with specific reserves had a recorded investment of $13.9 million and $12.7 million as of December 31, 2020 and 2019, respectively. Interest income on nonaccrual loans individually evaluated for impairment is recognized on a cash basis only when Park expects to receive the entire recorded investment in the loans. Interest income on accruing TDRs individually evaluated for impairment continues to be recorded on an accrual basis. The following table presents the average recorded investment and interest income recognized subsequent to impairment on loans individually evaluated for impairment as of and for the years ended December 31, 2020, 2019, and 2018: Year ended December 31, 2020 (In thousands) Recorded Investment as of December 31, 2020 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 28,836 $ 30,280 $ 735 Commercial real estate 70,357 55,279 1,890 Construction real estate: Commercial 3,110 1,291 50 Residential real estate: Commercial 4,557 4,329 204 Consumer — — — Leases 1,595 1,115 — Total $ 108,455 $ 92,294 $ 2,879 Year ended December 31, 2019 (In thousands) Recorded Investment as of December 31, 2019 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 33,088 $ 21,415 $ 527 Commercial real estate 41,791 32,132 1,241 Construction real estate: Commercial 453 1,987 26 Residential real estate: Commercial 2,025 2,175 99 Consumer — — — Leases 134 59 — Total $ 77,491 $ 57,768 $ 1,893 Year ended December 31, 2018 (In thousands) Recorded Investment as of December 31, 2018 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 15,120 $ 21,000 $ 695 Commercial real estate 28,426 23,024 1,047 Construction real estate: Commercial 1,866 1,709 34 Residential real estate: Commercial 2,732 5,308 114 Consumer — — — Leases — — — Total $ 48,144 $ 51,041 $ 1,890 The following tables present the aging of the recorded investment in past due loans as of December 31, 2020 and December 31, 2019 by class of loan. 12/31/2020 (In thousands) Accruing Loans Past Due 30-89 Days Past Due Nonaccrual Loans and Loans Past Due 90 Days or More and Accruing (1) Total Past Due Total Current (2) Total Recorded Investment Commercial, financial and agricultural $ 7,372 $ 13,968 $ 21,340 $ 1,574,177 $ 1,595,517 Commercial real estate 82 972 1,054 1,753,152 1,754,206 Construction real estate: Commercial — 39 39 227,524 227,563 Mortgage 77 — 77 115,647 115,724 Installment 12 — 12 929 941 Residential real estate: Commercial 17 493 510 526,873 527,383 Mortgage 9,538 7,814 17,352 1,079,953 1,097,305 HELOC 805 810 1,615 181,060 182,675 Installment 67 71 138 8,320 8,458 Consumer 5,496 1,213 6,709 1,657,505 1,664,214 Leases 186 984 1,170 23,282 24,452 Total loans $ 23,652 $ 26,364 $ 50,016 $ 7,148,422 $ 7,198,438 (1) Includes an aggregate of $1.6 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans. (2) Includes an aggregate of $92.6 million of nonaccrual loans which are current in regards to contractual principal and interest payments. 12/31/2019 (In thousands) Accruing Loans Past Due 30-89 Days Past Due, Nonaccrual Loans and Loans Past Due 90 Days or More and Accruing (1) Total Past Due Total Current (2) Total Recorded Investment Commercial, financial and agricultural $ 582 $ 12,407 $ 12,989 $ 1,176,514 $ 1,189,503 Commercial real estate 160 1,143 1,303 1,613,681 1,614,984 Construction real estate: Commercial — — — 234,463 234,463 Mortgage 397 — 397 96,405 96,802 Installment 24 — 24 1,468 1,492 Residential real estate: Commercial — 908 908 479,512 480,420 Mortgage 12,841 9,153 21,994 1,155,703 1,177,697 HELOC 652 779 1,431 224,448 225,879 Installment 164 338 502 12,093 12,595 Consumer 6,561 1,621 8,182 1,448,507 1,456,689 Leases 368 186 554 29,547 30,101 Total loans $ 21,749 $ 26,535 $ 48,284 $ 6,472,341 $ 6,520,625 (1) Includes an aggregate of $2.7 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans. (2) Includes an aggregate of $66.3 million of nonaccrual loans which are current in regards to contractual principal and interest payments. Credit Quality Indicators Management utilizes past due information as a credit quality indicator across the loan portfolio. Past due information as of December 31, 2020 and 2019 is included in the tables above. The past due information is the primary credit quality indicator within the following classes of loans: (1) mortgage loans and installment loans in the construction real estate segment; (2) mortgage loans, HELOC and installment loans in the residential real estate segment; and (3) consumer loans. The primary credit indicator for commercial loans is based on an internal grading system that grades all commercial loans on a scale from 1 to 8. Credit grades are continuously monitored by the responsible loan officer and adjustments are made when appropriate. A grade of 1 indicates little or no credit risk and a grade of 8 is considered a loss. Commercial loans that are pass rated (graded a 1 through a 4) are considered to be of acceptable credit risk. Commercial loans graded a 5 (special mention) are considered to be watch list credits and a higher loan loss reserve percentage is allocated to these loans. Loans classified as special mention have potential weaknesses that require management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of Park’s credit position at some future date. Commercial loans graded a 6 (substandard), also considered watch list credits, are considered to represent higher credit risk and, as a result, a higher loan loss reserve percentage is allocated to these loans. Loans classified as substandard are inadequately protected by the current sound worth and paying capacity of the obligor or the value of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that Park will sustain some loss if the deficiencies are not corrected. Commercial loans graded a 7 (doubtful) are shown as nonaccrual and Park generally charges these loans down to their fair value by taking a partial charge-off or recording a specific reserve. Loans classified as doubtful have all the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Certain 6-rated loans and all 7-rated loans are placed on nonaccrual status and included within the impaired category. A loan is deemed impaired when management determines the borrower's ability to perform in accordance with the contractual loan agreement is in doubt. Any commercial loan graded an 8 (loss) is completely charged off. The tables below present the recorded investment by loan grade at December 31, 2020 and December 31, 2019 for all commercial loans: 12/31/2020 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing TDRs Purchased Credit Impaired (1) Pass-Rated Recorded Commercial, financial and agricultural* $ 14,638 $ — $ 28,880 $ 337 $ 1,551,662 $ 1,595,517 Commercial real estate* 87,439 117 70,357 7,461 1,588,832 $ 1,754,206 Construction real estate: Commercial 164 — 3,110 1,002 223,287 $ 227,563 Residential real estate: Commercial 798 22 4,557 1,510 520,496 $ 527,383 Leases 331 — 1,595 112 22,414 $ 24,452 Total Commercial Loans $ 103,370 $ 139 $ 108,499 $ 10,422 $ 3,906,691 $ 4,129,121 * Included within commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that were not broken out by class. (1) There were no loans acquired with deteriorated credit quality which were nonaccrual or TDRs at December 31, 2020. 12/31/2019 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing TDRs Purchased Credit Impaired (1) Pass Rated Recorded Investment Commercial, financial and agricultural* $ 11,981 $ 3 $ 33,125 $ 966 $ 1,143,428 $ 1,189,503 Commercial real estate* 6,796 945 41,791 9,182 1,556,270 1,614,984 Construction real estate: Commercial 4,857 1 453 1,044 228,108 234,463 Residential real estate: Commercial 3,839 30 2,025 1,754 472,772 480,420 Leases — — 134 523 29,444 30,101 Total Commercial Loans $ 27,473 $ 979 $ 77,528 $ 13,469 $ 3,430,022 $ 3,549,471 * Included within commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that were not broken out by class. (1) Excludes loans acquired with deteriorated credit quality which are nonaccrual or TDRs due to additional credit deterioration or modification post acquisition. These loans had a recorded investment of $6,000 at December 31, 2019. Loans and Leases Acquired with Deteriorated Credit Quality In conjunction with the NewDominion acquisition, Park acquired loans with a book value of $277.9 million as of the July 1, 2018 acquisition date. These loans were recorded at the initial fair value of $272.8 million. Loans acquired with deteriorated credit quality with a book value of $5.1 million were recorded at the initial fair value of $4.9 million. The carrying amount of loans acquired with deteriorated credit quality at December 31, 2020 and December 31, 2019 was $1.6 million and $3.0 million, respectively, while the outstanding customer balance was $1.7 million and $3.2 million, respectively. A t December 31, 2020 and December 31, 2019, an allowance for loan losses of $1,000 and $101,000, respectively, had been recognized related to the acquired impaired loans. In conjunction with the Carolina Alliance acquisition, Park acquired loans and leases with a book value of $589.7 million as of the April 1, 2019 acquisition date. These loans and leases were recorded at the initial fair value of $578.6 million. Loans and leases acquired with deteriorated credit quality with a book value of $19.9 million were recorded at the initial fair value of $18.4 million. The carrying amount of loans and leases acquired with deteriorated credit quality at December 31, 2020 and December 31, 2019 was $9.5 million and $11.3 million, respectively, while the outstanding customer balance was $11.8 million and $13.8 million, respectively. At December 31, 2020 and December 31, 2019 , an allowance for loan losses of $166,000 and $167,000, respectively, had been recognized related to the acquired impaired loans. Troubled Debt Restructurings Management typically classifies loans as TDRs when a borrower is experiencing financial difficulties and Park has granted a concession to the borrower as part of a modification or in the loan renewal process. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of the borrower's debt in the foreseeable future without the modification. This evaluation is performed in accordance with the Company’s internal underwriting policy. Management’s policy is to modify loans by extending the term or by granting a temporary or permanent contractual interest rate below the market rate, not by forgiving debt. A court's discharge of a borrower's debt in a Chapter 7 bankruptcy is considered a concession when the borrower does not reaffirm the discharged debt. Additionally, Park is working with borrowers impacted by the COVID-19 pandemic and providing modifications to include either interest only deferral or principal and interest deferral, in each case, for initial periods up to 90 days. As necessary, Park is making available a second 90-day interest only deferral or principal and interest deferral bringing the total potential deferral period to six months. A majority of these modifications are excluded from TDR classification under Section 4013 of the CARES Act or under applicable interagency guidance of the federal banking regulators. In accordance with this guidance, such modified loans will be considered current and will continue to accrue interest during the deferral period. Certain loans which were modified during the years ended December 31, 2020 and December 31, 2019 did not meet the definition of a TDR as the modification was a delay in a payment that was considered to be insignificant. Management considers a forbearance period of up to three months or a delay in payment of up to 30 days to be insignificant. TDRs may be classified as accruing if the borrower has been current for a period of at least six months with respect to loan payments and management expects that the borrower will be able to continue to make payments in accordance with the terms of the restructured note. Management reviews all accruing TDRs quarterly to ensure payments continue to be made in accordance with the modified terms. At December 31, 2020 and 2019, there were $25.8 million and $34.3 million, respectively, of TDRs included in the nonaccrual loan totals. At December 31, 2020 and 2019, $12.9 million and $23.2 million, respectively, of these nonaccrual TDRs were performing in accordance with the terms of the restructured notes. At December 31, 2020 and 2019, loans with a recorded investment of $20.9 million and $21.3 million, respectively, were included in accruing TDR loan totals. Management will continue to review the restructured loans and may determine it is appropriate to move certain nonaccrual TDRs to accrual status in the future. At December 31, 2020 and 2019, Park had commitments to lend $6.7 million and $7.9 million, respectively, of additional funds to borrowers whose outstanding loan terms had been modified in a TDR. At December 31, 2020 and 2019, there were $0.2 million and $2.2 million, respectively, of specific reserves related to TDRs. Modifications made in 2020 and 2019 were largely the result of renewals and extending the maturity date of the loans at terms consistent with the original notes. These modifications were deemed to be TDRs primarily due to Park’s conclusion that the borrower would likely not have qualified for similar terms through another lender. Many of the modifications deemed to be TDRs were previously identified as impaired loans, and thus were also previously evaluated for impairment under ASC 310. Additional specific reserves of $7,000 were recorded during the year ended December 31, 2020, as a result of TDRs identified in the 2020 year. Additional specific reserves of $1,300 were recorded during the year ended December 31, 2019, as a result of TDRs identified in the 2019 year. Additional specific reserves of $0.2 million were recorded during the year ended December 31, 2018, as a result of TDRs identified in the 2018 year. Quarterly, management reviews renewals/modifications of loans previously identified as TDRs to consider if it is appropriate to remove the TDR classification. If the borrower is no longer experiencing financial difficulty and the renewal/modification did not contain a concessionary interest rate or other concessionary terms and the terms of the renewal/modification are considered to be market terms based on the current risk characteristics of the borrower, management considers the potential removal of the TDR classification. If deemed appropriate, the TDR classification is removed if the borrower has complied with the terms of the loan at the date of the renewal/modification and there was a reasonable expectation that the borrower would continue to comply with the terms of the loan subsequent to the date of the renewal/modification. The majority of these TDRs were originally considered restructurings in a prior year as a result of a renewal/modification with an interest rate that was not commensurate with the risk of the underlying loan at the time of the renewal/modification. During the years ended December 31, 2020 and 2019, Park removed the TDR classification on $2.3 million and $38,000, respectively, of loans that met the requirements discussed above. The terms of certain other loans were modified during the years ended December 31, 2020 and 2019 that did not meet the definition of a TDR. Excluding COVID-19 related modifications, there were $0.2 million of substandard commercial loans modified during the year ended December 31, 2020 which did not meet the definition of a TDR. There were $0.6 million of substandard commercial loans modified during the year ended December 31, 2019 which did not meet the definition of a TDR. Excluding COVID-19 related modifications, consumer loans modified during 2020 which did not meet the definition of a TDR had a total recorded investment as of December 31, 2020 of $57.9 million . Consumer loans modified during 2019 which did not meet the definition of a TDR had a total recorded investment as of December 31, 2019 of $36.2 million. Many of these loans were to borrowers who were not experiencing financial difficulties but who were looking to reduce their cost of funds. During the year ended December 31, 2020, Park modified 5,005 consumer loans, with an aggregate balance of $103.5 million, and modified 1,399 commercial loans, with an aggregate balance of $563.7 million, in each case related to a hardship caused by the COVID-19 pandemic and responses thereto. Of the $103.5 million in consumer COVID-19 related modifications, $2.1 million were already classified as TDRs due to previous modifications and $949,000 were classified as TDRs due to the COVID-19 modification. Of the $563.7 million in commercial COVID-19 related modifications, $6.3 million were already classified as TDRs due to previous modifications and $109,000 were classified as TDRs due to the COVID-19 modification. The remaining loans met the exclusion criteria for TDR accounting either in Section 4013 of the CARES Act or in applicable interagency guidance. The following tables detail the number of contracts modified as TDRs during the years ended December 31, 2020, 2019 and 2018 as well as the recorded investment of these contracts at December 31, 2020, 2019, and 2018. The recorded investment pre- and post-modification is generally the same due to the fact that Park does not typically forgive principal. Year ended (In thousands) Number of Contracts Accruing Nonaccrual Recorded Investment Commercial, financial and agricultural 12 $ 107 $ 3,706 $ 3,813 Commercial real estate 9 — 3,235 3,235 Construction real estate: Commercial — — — — Mortgage 1 26 — 26 Installment 1 — 14 14 Residential real estate: Commercial 3 153 3 156 Mortgage 27 888 1,068 1,956 HELOC 7 14 52 66 Installment 18 163 65 228 Consumer 214 218 634 852 Total loans 292 $ 1,569 $ 8,777 $ 10,346 Year ended (In thousands) Number of Contracts Accruing Nonaccrual Recorded Investment Commercial, financial and agricultural 30 $ 6,040 $ 7,821 $ 13,861 Commercial real estate 8 415 7,855 8,270 Construction real estate: Commercial 3 — 415 415 Mortgage 2 77 — 77 Installment — — — — Residential real estate: Commercial 3 — 100 100 Mortgage 21 535 589 1,124 HELOC 18 126 234 360 Installment 34 1,047 28 1,075 Consumer 324 225 1,166 1,391 Total loans 443 $ 8,465 $ 18,208 $ 26,673 Year ended (In thousands) Number of Contracts Accruing Nonaccrual Recorded Investment Commercial, financial and agricultural 21 $ 28 $ 829 $ 857 Commercial real estate 17 414 3,172 3,586 Construction real estate: Commercial 1 — — — Mortgage — — — — Installment 2 10 — 10 Residential real estate: Commercial 3 54 363 417 Mortgage 25 842 854 1,696 HELOC 21 558 86 644 Installment 19 459 69 528 Consumer 283 204 1,249 1,453 Total loans 392 $ 2,569 $ 6,622 $ 9,191 Of those loans which were modified and determined to be a TDR during the year ended December 31, 2020, $0.4 million were on nonaccrual status as of December 31, 2019. Of those loans which were modified and determined to be a TDR during the year ended December 31, 2019, $2.1 million were on nonaccrual status as of December 31, 2018. Of those loans which were modified and determined to be a TDR during the year ended December 31, 2018, $0.5 million were on nonaccrual status as of December 31, 2017. The following table presents the recorded investment in financing receivables which were modified as TDRs within the previous 12 months and for which there was a payment default during the year ended December 31, 2020, December 31, 2019, and December 31, 2018. For this table, a loan is considered to be in default when it becomes 30 days contractually past due under the modified terms. The additional allowance for loan loss resulting from the defaults on TDR loans was immaterial. Year ended Year ended Year ended (In thousands) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial, financial and agricultural 4 $ 2,776 1 $ 20 3 $ 104 Commercial real estate 1 223 — — — — Construction real estate: Commercial — — — — — — Mortgage — — — — — — Installment 1 14 — — — — Residential real estate: Commercial 1 3 — — — — Mortgage 11 993 7 665 8 518 HELOC — — 6 141 2 32 Installment 3 32 — — 1 29 Consumer 34 360 56 539 59 636 Leases — — — — — — Total loans 55 $ 4,401 $ 70 $ 1,365 73 $ 1,319 Of the $4.4 million in modified TDRs which defaulted during the year ended December 31, 2020, $706,000 were accruing loans and $3.7 million were nonaccrual loans. Of the $1.4 million in modified TDRs which defaulted during the year ended December 31, 2019, $350,000 were accruing loans and $1.0 million were nonaccrual loans. Of the $1.3 million in modified TDRs which defaulted during the year ended December 31, 2018, $86,000 were accruing loans and $1.2 million were nonaccrual loans. Certain of the Corporation’s executive officers, directors and related entities of directors are loan customers of PNB. As of December 31, 2020 and 2019, credit exposure aggregating approximately $51.3 million and $44.3 million, respectively, was outstanding to such parties. Of this total exposure, approximately $32.0 million and $28.7 million was outstanding at December 31, 2020 and 2019, respectively, with the remaining balance representing available credit. During 2020, new loans and advances on existing loans were made to these executive officers, directors and related entities of directors totaling $0.6 million and $12.4 million, respectively. These extensions of credit were offset by principal payments of $9.7 million. During 2019, new loans and advances on existing loans were $9.2 million and $8.9 million, respectively. These extensions of credit were offset by principal payments of $15.3 million.

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2020
Allowance For Loan Losses [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is that amount management believes is adequate to absorb probable incurred credit losses in the loan portfolio based on management’s evaluation of various factors including the overall growth in the loan portfolio, an analysis of individual loans, prior and current loss experience, and current economic conditions. A provision for loan losses is charged to operations based on management’s periodic evaluation of these and other pertinent factors as discussed within Note 1 - Summary of Significant Accounting Policies. Loss factors are reviewed quarterly and updated at least annually to reflect recent loan loss history and incorporate current risks and trends which may not be recognized in historical data. For all loan types, management considers the following factors in determining loan collectability and the appropriate level of the allowance: • Changes in the nature and volume of the portfolio and in the terms of loans, including: ◦ Trends (e.g., growth, reduction) in specific categories of the loan portfolio, as well as adjustments to the types of loans offered by PNB and GFSC. ◦ Level of and trend in loan delinquencies, troubled loans, commercial watch list and impaired loans. ◦ Level of and trend in new nonaccrual loans. ◦ Level of and trend in loan charge-offs and recoveries. • Changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, and recovery practices. • Changes in national and local economic and business conditions and developments that affect the collectability of the portfolio. • The effect of other external factors such as competition and legal and regulatory requirements on the level of estimated losses in Park's existing portfolio. Commercial Loans The following are factors management reviews specifically for commercial loans on a quarterly or annual basis. • Historical Loss Factor: In calculating the allowance for loan losses, management believes it is appropriate to consider historical loss rates that are comparable to the current period being analyzed, giving consideration to losses experienced over a full cycle. As such, a year is added to the look back period each time historical losses are updated, until the economic cycle is complete, as defined by a period of rising charge-offs, considering both internal and industry trends. In updating the historical loss rates to incorporate 2020 losses, management considered if the economic deterioration as a result of the COVID-19 pandemic represented the end of a cycle for the purposes of the allowance for loan loss calculation, but, due to the historically low level of charge-offs, determined 2020 should be included in the cycle beginning in 2010. For the historical loss factor at December 31, 2020, the Company utilized an annual loss rate, calculated based on an average of the net charge-offs and the annual change in specific reserves for impaired commercial loans, experienced during 2010 through 2020 within the individual segments of the commercial and consumer loan categories. • Loss Emergence Period Factor: Typically, management calculates the loss emergence period for each commercial loan segment on an annual basis. The loss emergence period is calculated based upon the average period of time it takes from the probable occurrence of a loss event to the loan being moved to nonaccrual. If the loss emergence period for any commercial loan segment is greater than one year, management applies additional general reserves to all performing loans within that segment of the commercial loan portfolio. The loss emergence period was last updated in the fourth quarter of 2019. Management did not update the loss emergence period calculation in 2020. Due to the COVID-19 pandemic, management performed a timely analysis into its commercial loan portfolio to identify loans negatively impacted by the pandemic. This resulted in the downgrade of numerous loans to nonaccrual status within months of the loss event (the COVID-19 pandemic). Including these loans artificially lowers the loss emergence period for 2020. Management does not believe this is reflective of what is expected as the loss emergence period for the remaining portfolio. During the third quarter of 2020, Park made the decision to extend the loss emergence period on all commercial loan types by six months. Management believes that the start of the COVID-19 pandemic in March 2020 represents the loss event. Management continues to refine its estimate of incurred losses as a result of this March 2020 loss event. Approximately nine months following the start of the pandemic, Park has experienced very little, if any, increase in delinquencies and charge-offs. Management believes that this is due to the unprecedented level of economic stimulus, CARES Act accommodations, and Consolidated Appropriations Act, 2021 accommodations provided by the U.S. government which has delayed loan defaults and losses. • Loss Migration Factor: Park’s commercial loans are individually risk graded. If loan downgrades occur, the probability of default increases, and accordingly, management allocates a higher percentage reserve to those accruing commercial loans graded special mention and substandard. Annually, management calculates a loss migration factor for each commercial loan segment for special mention and substandard credits based on a review of losses over the period of time a loan takes to migrate from pass-rated to impaired. The loss migration factor was last updated in the fourth quarter of 2020. • Environmental Loss Factor: Management has identified certain macroeconomic factors that trend in accordance with losses in Park’s commercial loan portfolio. Certain environmental loss factors have been determined to correlate with higher charge-offs while other adjustments are based on a subjective evaluation of other environmental loss factors. Environmental factors applicable to the commercial loan portfolio include: the Ohio unemployment rate, percent change in Ohio GDP, the consumer confidence index, the prevalence of fixed rate loans in the portfolio and other environmental factors. In evaluating the ongoing relevance and amount of the other environmental factors, management considers: changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off and recovery practices, changes in national and local economic and business conditions, and developments that affect the collectability of the portfolio, and the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated losses in Park's existing portfolio. All of these factors are evaluated in relation to the historical look back period. At both December 31, 2020 and December 31, 2019, such subjective environmental loss factor inputs accounted for 42% of the allowance for loan losses driven by environmental loss factors. These macroeconomic factors are reviewed quarterly and the adjustments made to the environmental loss factor impacting each segment in the performing commercial loan portfolio correlate to changes in the macroeconomic environment in relation to the historical loss period. The environmental loss factors were updated in each quarter of 2020 to consider the economic impact of the COVID-19 pandemic. These factors were increased from 0.60% of applicable loans at December 31, 2019 to 0.675% of applicable loans at March 31, 2020, to 0.75% of applicable loans at June 30, 2020, to 0.825% at September 30, 2020, and to 0.855% at December 31, 2020. The increases in the first and second quarters of 2020 were the result of upward adjustments to the factors for Ohio unemployment, percent change in Ohio GDP and consumer confidence. The increase in the third quarter of 2020 was due to the increased uncertainty in the overall economic environment, the unknown length and severity of the pandemic and the limitations in the incurred loss model to capture all probable incurred losses during such uncertain times. The increase in the fourth quarter was a result of consideration of the other environmental factors in relation to the extended 132-month historical loss period. Management will continue to evaluate this estimate of incurred losses as new information becomes available. In addition to the increases in the environmental loss factor, in the second quarter, Park added additional reserves for three industries at particularly high risk due to the pandemic: hotels and accommodations, restaurants and food service, and strip shopping centers. These industries have had high levels of deferrals and have been particularly impacted by shut downs of non-essential businesses, increased health department regulations, and changes in consumer behavior. Management expects that a high percentage of the 4-rated credits in these portfolios will eventually migrate to special mention, substandard, or impaired status. As a result, additional reserves totaling $3.8 million were added for these portfolios on top of that already calculated. This amount was calculated by applying the loss factor for special mention credits to all 4-rated loans in these portfolios. A breakout of the 4-rated balances and additional reserve related to these portfolios is detailed in the following table. December 31, 2020 (in thousands) 4-Rated Balance 4-Rated Balance - Originated 4-Rated Balance - Purchased Additional Reserve Hotels and accommodations $ 96,909 $ 93,090 $ 3,819 $ 1,391 Restaurants and food service 33,409 27,880 5,529 637 Strip shopping centers 177,706 156,605 21,101 1,731 Total $ 308,024 $ 277,575 $ 30,449 $ 3,759 Additionally, management applied a 1% reserve to all hotels and accommodations loans in the general reserve population to account for increased valuation risk. At December 31, 2020, Park's originated hotels and accommodation loans had a balance of $181.4 million with an additional reserve related to valuation risks of $1.8 million. As of December 31, 2020, Park had $337.1 million of PPP loans which are included in the commercial, financial and agricultural portfolio segment. These loans are guaranteed by the SBA and thus have not been reserved for using the same methodology as the rest of Park’s loan portfolio. A 10 basis point reserve was calculated for these loans to reflect minimal credit risk. Consumer Loans For the consumer portfolio, a specific COVID-19 factor was added to each segment equal to 75% of the 132-month historical loss factor (representing 9 months of charge-off delay). This increase considers the payment deferrals being provided to consumer loan customers and unprecedented level of government stimulus as well as the likely delays in delinquencies and charge-offs as a result. Much is still unknown about the economic impact of COVID-19, including the duration of the pandemic, future government programs that may be established as a result of the pandemic, and the resiliency of the U.S. economy. Management will continue to evaluate this estimate of incurred losses as new information becomes available. Given uncertainty about the magnitude and length of the COVID-19 pandemic and related economic shutdown, additional loan loss provisions may be required that would adversely impact earnings in future periods. Purchased Loans Loans acquired as part of the acquisitions of NewDominion and Carolina Alliance were recorded at fair value on the respective dates of acquisition. An allowance is only established on these loans as a result of credit deterioration post acquisition. At December 31, 2020, there was a $678,000 allowance related to performing acquired loans. At December 31, 2020, a reserve of $167,000 had been established related to PCI loans. At December 31, 2019, there was no allowance related to performing acquired loans, and a reserve of $268,000 related to PCI loans. The activity in the allowance for loan losses for the years ended December 31, 2020, 2019, and 2018 is summarized in the following tables. Year ended December 31, 2020 (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 20,203 $ 10,229 $ 5,311 $ 8,610 $ 12,211 $ 115 $ 56,679 Charge-offs 1,468 1,824 6 356 6,634 16 10,304 Recoveries (20,765) (738) (1,122) (991) (3,629) (1) (27,246) Net (recoveries) charge-offs (19,297) 1,086 (1,116) (635) 3,005 15 (16,942) (Recovery) Provision (13,892) 14,337 861 2,118 8,212 418 12,054 Ending balance $ 25,608 $ 23,480 $ 7,288 $ 11,363 $ 17,418 518 $ 85,675 Year ended December 31, 2019 (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 16,777 $ 9,768 $ 4,463 $ 8,731 $ 11,773 $ — $ 51,512 Charge-offs 2,231 400 — 239 8,307 — 11,177 Recoveries (1,241) (720) (2,682) (787) (4,742) (1) (10,173) Net charge-offs (recoveries) 990 (320) (2,682) (548) 3,565 (1) 1,004 Provision (Recovery) 4,416 141 (1,834) (669) 4,003 114 6,171 Ending balance $ 20,203 $ 10,229 $ 5,311 $ 8,610 $ 12,211 $ 115 $ 56,679 Year ended December 31, 2018 (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 15,022 $ 9,601 $ 4,430 $ 9,321 $ 11,614 $ — $ 49,988 Charge-offs 2,796 281 72 441 9,962 — 13,552 Recoveries (1,221) (272) (712) (844) (4,078) (4) (7,131) Net charge-offs (recoveries) 1,575 9 (640) (403) 5,884 (4) 6,421 Provision (Recovery) 3,330 176 (607) (993) 6,043 (4) 7,945 Ending balance $ 16,777 $ 9,768 $ 4,463 $ 8,731 $ 11,773 $ — $ 51,512 Loans collectively evaluated for impairment in the following tables include all performing loans at December 31, 2020 and 2019, as well as nonperforming loans internally classified as consumer loans. Nonperforming consumer loans are not typically individually evaluated for impairment, but receive a portion of the statistical allocation of the allowance for loan losses. Loans individually evaluated for impairment include all impaired loans internally classified as commercial loans at December 31, 2020 and 2019, which are evaluated for impairment in accordance with U.S. GAAP (see Note 1 - Summary of Significant Accounting Policies). The composition of the allowance for loan losses at December 31, 2020 and 2019 was as follows: December 31, 2020 (In thousands) Commercial, financial, and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ 3,758 $ 1,316 $ — $ 16 $ — $ 344 $ 5,434 Collectively evaluated for impairment 21,809 22,093 7,288 11,292 17,418 174 80,074 Acquired with deteriorated credit quality 41 71 — 55 — — 167 Total ending allowance balance $ 25,608 $ 23,480 $ 7,288 $ 11,363 $ 17,418 $ 518 $ 85,675 Loan balance: Loans individually evaluated for impairment $ 28,811 $ 70,334 $ 3,110 $ 4,557 $ — $ 1,595 $ 108,407 Loans collectively evaluated for impairment 1,559,842 1,670,510 339,312 1,806,126 1,659,704 22,731 7,058,225 Loans acquired with deteriorated credit quality 336 7,345 999 2,361 — 112 11,153 Total ending loan balance $ 1,588,989 $ 1,748,189 $ 343,421 $ 1,813,044 $ 1,659,704 $ 24,438 $ 7,177,785 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 13.04 % 1.87 % — % 0.35 % — % 21.57 % 5.01 % Loans collectively evaluated for impairment 1.40 % 1.32 % 2.15 % 0.63 % 1.05 % 0.77 % 1.13 % Loans acquired with deteriorated credit quality 12.20 % 0.97 % — % 2.33 % — % — % 1.50 % Total 1.61 % 1.34 % 2.12 % 0.63 % 1.05 % 2.12 % 1.19 % Recorded investment: Loans individually evaluated for impairment $ 28,836 $ 70,357 $ 3,110 $ 4,557 $ — $ 1,595 $ 108,455 Loans collectively evaluated for impairment 1,566,344 1,676,388 340,116 1,808,892 1,664,214 22,745 7,078,699 Loans acquired with deteriorated credit quality 337 7,461 1,002 2,372 — 112 11,284 Total ending recorded investment $ 1,595,517 $ 1,754,206 $ 344,228 $ 1,815,821 $ 1,664,214 $ 24,452 $ 7,198,438 December 31, 2019 (In thousands) Commercial, financial, and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ 5,104 $ 35 $ — $ 42 $ — $ 49 $ 5,230 Collectively evaluated for impairment 14,948 10,187 5,311 8,458 12,211 66 51,181 Acquired with deteriorated credit quality 151 7 — 110 — — 268 Total ending allowance balance $ 20,203 $ 10,229 $ 5,311 $ 8,610 $ 12,211 $ 115 $ 56,679 Loan balance: Loans individually evaluated for impairment $ 33,077 $ 41,770 $ 453 $ 2,025 $ — $ 134 $ 77,459 Loans collectively evaluated for impairment 1,151,073 1,558,550 330,106 1,888,088 1,452,373 29,424 6,409,614 Loans acquired with deteriorated credit quality (1) 960 9,093 1,140 2,613 2 523 14,331 Total ending loan balance $ 1,185,110 $ 1,609,413 $ 331,699 $ 1,892,726 $ 1,452,375 $ 30,081 $ 6,501,404 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 15.43 % 0.08 % — % 2.07 % — % 36.57 % 6.75 % Loans collectively evaluated for impairment 1.30 % 0.65 % 1.61 % 0.45 % 0.84 % 0.22 % 0.80 % Loans acquired with deteriorated credit quality 15.73 % 0.08 % — % 4.21 % — % — % 1.87 % Total 1.70 % 0.64 % 1.60 % 0.45 % 0.84 % 0.38 % 0.87 % Recorded investment: Loans individually evaluated for impairment $ 33,088 $ 41,791 $ 453 $ 2,025 $ — $ 134 $ 77,491 Loans collectively evaluated for impairment 1,155,449 1,564,011 331,161 1,891,941 1,456,687 29,444 6,428,693 Loans acquired with deteriorated credit quality (1) 966 9,182 1,143 2,625 2 523 14,441 Total ending recorded investment $ 1,189,503 $ 1,614,984 $ 332,757 $ 1,896,591 $ 1,456,689 $ 30,101 $ 6,520,625 (1) Excludes loans acquired with deteriorated credit quality which are individually evaluated for impairment due to additional credit deterioration post acquisition. These loans had a balance of $5,000, a recorded investment of $6,000, and no allowance as of December 31, 2019.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles	Goodwill and Other Intangible Assets The following table shows the activity in goodwill and other intangible assets for the years ended December 31, 2020, 2019 and 2018. (in thousands) Goodwill Other Total January 1, 2018 $ 72,334 $ — $ 72,334 Acquired goodwill and other intangible assets 40,405 7,549 47,954 Amortization — 578 578 December 31, 2018 $ 112,739 $ 6,971 $ 119,710 Acquired goodwill and other intangible assets 46,856 8,207 55,063 Amortization — 2,355 2,355 Trade name intangible impairment — 1,300 1,300 December 31, 2019 $ 159,595 $ 11,523 $ 171,118 Acquired goodwill and other intangible assets — — — Amortization — 2,263 2,263 December 31, 2020 $ 159,595 $ 9,260 $ 168,855 Goodwill impairment exists when a reporting unit's carrying value exceeds its fair value. Park evaluates goodwill for impairment on April 1 of each year, with financial data as of March 31. At April 1, 2020, the Company's reporting unit, PNB, had positive equity and the Company elected to perform a qualitative assessment to determine if it was more likely than not that the fair value of the reporting unit exceeded its carrying value, including goodwill. The qualitative assessment indicated that it was more likely than not that the fair value of the reporting unit exceeded its carrying value, resulting in no impairment. During each of the second, third and fourth quarters of 2020, management determined that the deterioration in general economic conditions as a result of the COVID-19 pandemic and responses thereto represented a triggering event prompting an evaluation of goodwill impairment. Based on the qualitative analysis performed during each of the second, third and fourth quarters of 2020, the Company determined that goodwill was not impaired. Management continues to monitor economic factors to evaluate goodwill impairment. Acquired Intangible Assets The following table shows the balance of acquired intangible assets as of December 31, 2020 and 2019. 2020 2019 (in thousands) Gross Carrying Amount Accumulated Amortization/Impairment Gross Carrying Amount Accumulated Amortization Other intangible assets: Core deposit intangibles $ 14,456 $ 5,196 $ 14,456 $ 2,933 Trade name intangible 1,300 1,300 1,300 1,300 Total $ 15,756 $ 6,496 $ 15,756 $ 4,233 During 2019, Park announced its 2020 rebranding initiative to operate all 12 banking divisions of PNB under one name. The NewDominion trade name intangible was initially recorded assuming an indefinite useful life. Considering Park's rebranding initiative, Park concluded that the trade name intangible represented a definite life asset, and impairment was recorded during 2019. Core deposit intangibles are being amortized, on an accelerated basis, over a period of ten years. Amortization expense for the core deposit intangibles was $2.3 million, $2.4 million and $0.6 million for the years ended December 31, 2020, 2019 and 2018, respectively. The following is a schedule of estimated amortization expense for each of the next five years: (in thousands) Total 2021 $ 1,798 2022 1,487 2023 1,323 2024 1,215 2025 1,042

Mortgage Loans Held for Sale

Mortgage Loans Held for Sale	12 Months Ended
	Dec. 31, 2020
Loans Held for Sale [Abstract]
Loans Held For Sale Disclosure [Text Block]	. Loans Held for Sale Mortgage loans held for sale are carried at their fair value. Mortgage loans held for sale were $31.7 million and $12.3 million at December 31, 2020 and 2019, respectively. These amounts are included in "Loans" on the Consolidated Balance Sheets and in the residential real estate loan segments in Note 6 - Loans and Note 7 - Allowance for Loan Losses. The contractual balance was $30.9 million and $12.1 million at December 31, 2020 and 2019, respectively. The gain expected upon sale was $753,000 and $153,000 at December 31, 2020 and 2019, respectively. None of these loans were 90 days or more past due or on nonaccrual status as of December 31, 2020 or 2019. During 2020, Park transferred a non-performing loan held for investment, with a book balance of $4.4 million, to the loans held for sale portfolio, and subsequently completed the sale of this non-performing loan held for sale, recognizing no gain or loss on sale. During 2018, Park transferred certain non-performing loans held for investment, with a book balance of $174,000, to the loans held for sale portfolio, and subsequently completed the sale of these non-performing loans held for sale, recognizing a net gain on sale of $2.8 million. No non-performing loans were held for sale or sold during 2019.

Foreclosed and Repossessed Asse

Foreclosed and Repossessed Assets	12 Months Ended
	Dec. 31, 2020
Other Assets [Abstract]
Real Estate Owned [Text Block]	Foreclosed and Repossessed Assets Park typically transfers a loan to OREO at the time that Park takes deed/title to the real estate property asset. The carrying amount of foreclosed properties held at December 31, 2020 and December 31, 2019 are listed below, as well as the recorded investment of loans secured by residential real estate properties for which formal foreclosure proceedings were in process at those dates. (In thousands) December 31, 2020 December 31, 2019 OREO: Commercial real estate $ 625 $ 2,295 Construction real estate — 879 Residential real estate 806 855 Total OREO $ 1,431 $ 4,029 Loans in process of foreclosure: Residential real estate $ 1,643 $ 3,959

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The major categories of premises and equipment and accumulated depreciation are summarized as follows: December 31 (In thousands) 2020 2019 Land $ 22,421 $ 23,520 Buildings 97,351 92,857 Equipment, furniture and fixtures 89,390 74,298 Leasehold improvements 6,381 5,386 Total $ 215,543 $ 196,061 Less accumulated depreciation (126,883) (122,739) Premises and equipment, net $ 88,660 $ 73,322 Depreciation expense amounted to $10.8 million, $9.1 million and $8.6 million for the years ended December 31, 2020, 2019 and 2018, respectively. Park records leased assets where Park acts as the lessor within "Other assets" on the Consolidated Balance Sheets. Equipment subject to lease agreements at December 31, 2020 and 2019 is summarized below: December 31 (In thousands) 2020 2019 Equipment $ 8,561 $ 9,277 Less accumulated depreciation (4,665) (3,911) Leased assets, net $ 3,896 $ 5,366 Depreciation expense on operating lease assets of $1.8 million, $1.3 million, and $26,000 was recorded for the years ended December 31, 2020, 2019 and 2018, respectively.

Investments in Qualified Afford

Investments in Qualified Affordable Housing	12 Months Ended
	Dec. 31, 2020
Investments in Affordable Housing Projects [Abstract]
Affordable Housing Program	Investments in Qualified Affordable Housing Park makes certain equity investments in various limited partnerships that sponsor affordable housing projects. The purposes of these investments are to achieve a satisfactory return on capital, help create affordable housing opportunities, and assist the Company to achieve its goals associated with the Community Reinvestment Act. As permitted by ASU 2014-01, Accounting for Investments in Qualified Affordable Housing Projects , Park has elected the proportional amortization method of accounting. Under the proportional amortization method, amortization expense and tax benefits are recognized through the provision for income taxes. The table below details the balances of Park’s affordable housing tax credit investments and related unfunded commitments as of December 31, 2020 and 2019. (In thousands) December 31, 2020 December 31, 2019 Affordable housing tax credit investments $ 56,024 $ 53,070 Unfunded commitments 29,298 25,894 Commitments are funded when capital calls are made by the general partner. Park expects that the commitments as of December 31, 2020 will be funded between 2021 and 2031. During the years ended December 31, 2020, 2019 and 2018, Park recognized amortization expense of $7.0 million, $6.9 million and $7.3 million, respectively, which was included within the provision for income taxes. For the years ended December 31, 2020, 2019 and 2018, Park recognized tax credits and other benefits from its affordable housing tax credit investments of $8.7 million, $8.8 million and $9.0 million, respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Deposits	Deposits At December 31, 2020 and 2019, non-interest bearing and interest bearing deposits were as follows: December 31 (In thousands) 2020 2019 Non-interest bearing $ 2,727,100 $ 1,959,935 Interest bearing 4,845,258 5,092,677 Total $ 7,572,358 $ 7,052,612 At December 31, 2020, the maturities of time deposits were as follows: (In thousands) 2021 $ 557,693 2022 209,375 2023 33,338 2024 29,578 2025 34,416 After 5 years 173 Total $ 864,573 At December 31, 2020 and 2019, respectively, Park had approximately $20.2 million and $17.7 million of deposits received from Park's executive officers, Park directors and related entities of Park directors. Time deposits that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2020 and 2019 were $77.2 million and $96.0 million, respectively.

Repurchase Agreement Borrowings

Repurchase Agreement Borrowings	12 Months Ended
	Dec. 31, 2020
Transfers of Financial Assets Accounted for as Secured Borrowings [Abstract]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]	Repurchase Agreement Borrowings Securities sold under agreements to repurchase ("repurchase agreements") with customers represent funds deposited by customers, generally on an overnight basis, that are collateralized by investment securities owned by Park. Repurchase agreements with customers are included in short-term borrowings on the Consolidated Balance Sheets. All repurchase agreements are subject to terms and conditions of repurchase/security agreements between Park and the client and are accounted for as secured borrowings. Park's repurchase agreements consisted of customer accounts and securities which are pledged on an individual security basis. At December 31, 2020 and December 31, 2019, Park's repurchase agreement borrowings totaled $317 million and $176 million, respectively. These borrowings were collateralized with U.S. government and agency securities with a fair value of $366 million and $200 million at December 31, 2020 and December 31, 2019, respectively. Declines in the value of the collateral would require Park to pledge additional securities. As of December 31, 2020 and December 31, 2019, Park had $439 million and $756 million, respectively, of available unpledged securities. The following table presents the carrying value of Park's repurchase agreement borrowings by remaining contractual maturity and collateral pledged at December 31, 2020 and December 31, 2019: December 31, 2020 (In thousands) Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater than 90 days Total U.S. government and agency securities $ 317,230 $ — $ — $ — $ 317,230 December 31, 2019 (In thousands) Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater than 90 days Total U.S. government and agency securities $ 175,657 $ — $ — $ — $ 175,657

Short Term Borrowings

Short Term Borrowings	12 Months Ended
	Dec. 31, 2020
Short-term Debt [Abstract]
Short-Term Borrowings	Short-Term Borrowings Short-term borrowings were as follows: December 31 (In thousands) 2020 2019 Securities sold under agreements to repurchase $ 317,230 $ 175,657 FHLB advances 25,000 55,000 Total short-term borrowings $ 342,230 $ 230,657 The outstanding balances for all short-term borrowings as of December 31, 2020 and 2019 and the weighted-average interest rates as of and paid during each of the years then ended were as follows: (In thousands) Repurchase agreements FHLB Advances 2020 Ending balance $ 317,230 $ 25,000 Highest month-end balance 317,230 25,000 Average daily balance 250,266 26,751 Weighted-average interest rate: As of year-end 0.03 % 0.26 % Paid during the year 0.19 % 2.38 % 2019 Ending balance $ 175,657 $ 55,000 Highest month-end balance 207,079 205,000 Average daily balance 168,449 47,371 Weighted-average interest rate: As of year-end 0.73 % 1.73 % Paid during the year 0.66 % 2.89 % During 2019 and 2020, outstanding FHLB advances were collateralized by investment securities owned by PNB and by various loans pledged under a blanket agreement by PNB. At December 31, 2020 and December 31, 2019, $14 million and $18 million, respectively, of investment securities were pledged as collateral for FHLB advances. At December 31, 2020 and December 31, 2019, $1,521 million and $1,566 million, respectively, of commercial real estate and residential mortgage loans were pledged

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt is listed below: December 31, 2020 2019 (In thousands) Outstanding Balance Interest Rate Outstanding Balance Interest Rate Total Federal Home Loan Bank advances by year of maturity: 2020 $ — — % $ — — % 2021 — — % — — % 2022 — — % 50,000 3.01 % 2023 — — % 100,000 3.40 % 2024 — — % — — % 2025 — — % — — % Thereafter — — % — — % Total $ — — % $ 150,000 3.27 % Total U.S. Bank term note by year of maturity: 2022 $ 32,500 1.84 % 42,500 3.40 % Total $ 32,500 1.84 % 42,500 3.40 % Total combined long-term debt by year of maturity: 2020 $ — — % — — % 2021 — — % — — % 2022 32,500 1.84 % 92,500 3.19 % 2023 — — % 100,000 3.40 % 2024 — — % — — % 2025 — — % — — % Thereafter — — % — — % Total $ 32,500 1.84 % $ 192,500 3.30 % Park had no long-term debt at December 31, 2020 with a contractual maturity longer than five years. On February 18, 2020, Park prepaid $50 million of FHLB advances, incurring a $1.8 million prepayment penalty recognized within "FHLB prepayment penalty" on the Consolidated Statement of Income for the year ended December 31, 2020. These advances had an average interest rate of 3.01% and maturity dates of March 14, 2022 and September 15, 2022. On December 3, 2020, Park prepaid $100 million of FHLB advances, incurring an $8.7 million prepayment penalty recognized within "FHLB prepayment penalty" on the Consolidated Statement of Income for the year ended December 31, 2020. These advances had an interest rate of 3.40% and a maturity date of December 1, 2023. At December 31, 2020 and December 31, 2019, FHLB advances were collateralized by investment securities owned by PNB and by various loans pledged under a blanket agreement by PNB. At December 31, 2020 and December 31, 2019, $14 million and $18 million, respectively, of investment securities were pledged as collateral for FHLB advances. At December 31, 2020 and December 31, 2019, $1,521 million and $1,566 million, respectively, of commercial real estate and residential mortgage loans were pledged under a blanket agreement to the FHLB by PNB. On June 20, 2019, Park issued a $50 million term note to U.S. Bank National Association. This term note has a maturity date of June 21, 2022 and accrues interest at a floating rate of one-month LIBOR plus 1.65%. As of December 31, 2020, Park was in compliance with the covenants in the credit agreement related to the term note.

Subordinated Notes

Subordinated Notes	12 Months Ended
	Dec. 31, 2020
Long-term Debt, Unclassified [Abstract]
Subordinated Debentures/Notes	Subordinated Notes As part of the acquisition of Vision's parent bank holding company ("Vision Parent") on March 9, 2007, Park became the successor to Vision Parent under (i) the Amended and Restated Trust Agreement of Vision Bancshares Trust I (the “Trust”), dated as of December 5, 2005, (ii) the Junior Subordinated Indenture, dated as of December 5, 2005, and (iii) the Guarantee Agreement, also dated as of December 5, 2005. On December 1, 2005, Vision Parent formed a wholly-owned Delaware statutory business trust, Vision Bancshares Trust I (“Trust I”), which issued $15.0 million of Trust I's floating rate preferred securities (the “Trust Preferred Securities”) to institutional investors. These Trust Preferred Securities qualify as Tier I capital under FRB guidelines. All of the common securities of Trust I are owned by Park. The proceeds from the issuance of the common securities and the Trust Preferred Securities were used by Trust I to purchase $15.5 million of junior subordinated notes, which carry a floating rate based on three-month LIBOR plus 148 basis points. The junior subordinated notes represent the sole asset of Trust I. The Trust Preferred Securities accrue and pay distributions at a floating rate of three-month LIBOR plus 148 basis points per annum. The Trust Preferred Securities are mandatorily redeemable upon maturity of the junior subordinated notes in December 2035, or upon earlier redemption as provided in the junior subordinated notes. Since December 30, 2010, Park has had the right to redeem the junior subordinated notes purchased by Trust I in whole or in part. As specified in the indenture, if the junior subordinated notes are redeemed prior to maturity, the redemption price will be the principal amount, plus any unpaid accrued interest. In accordance with U.S. GAAP, Trust I is not consolidated with Park’s financial statements, but rather the subordinated notes are reflected as a liability. On August 20, 2020, Park completed the issuance and sale of $175 million aggregate principal amount of its 4.50% Fixed-to-Floating Rate Subordinated Notes due 2030 (the "Subordinated Notes"). The Subordinated Notes initially bear a fixed interest rate of 4.50% per year, payable semi-annually in arrears on March 1 and September 1 of each year, commencing on March 1, 2021. Commencing on September 1, 2025, the Subordinated Notes will bear interest at a floating rate per annum equal to the Benchmark rate, which is expected to be Three-Month Term SOFR, plus a spread of 439 basis points for each quarterly interest period during the floating rate period, payable quarterly in arrears; provided, however, that if the Benchmark rate is less than zero, then the Benchmark rate shall be deemed to be zero. The Company may, at its option, beginning with the interest payment date of September 1, 2025 and on any interest payment date thereafter, redeem the Subordinated Notes, in whole or in part, from time to time, subject to obtaining the prior approval of the holders of the Company’s senior indebtedness and of the Federal Reserve Board to the extent the approval of the Federal Reserve Board is then required under the capital adequacy rules of the Federal Reserve Board, at a redemption price equal to 100% of the principal amount of the Subordinated Notes being redeemed, plus accrued and unpaid interest thereon to but excluding the date of redemption. The issuance costs of the Subordinated Notes totaled $2.4 million, which is being amortized through the Subordinated Note call date. The Subordinated Notes, net of unamortized issuance costs, totaled $172.8 million at December 31, 2020, and qualifies as Tier 2 capital for Park under the Federal Reserve Board capital adequacy rules.

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure	Derivatives Park uses certain derivative financial instruments (or "derivatives") to meet the needs of its clients while managing the interest rate risk associated with certain transactions. Park does not use derivatives for speculative purposes. A summary of derivative instruments utilized by Park follows. Interest Rate Swaps Park utilizes interest rate swap agreements as part of its asset liability management strategy to help manage its interest rate risk position and as a means to meet the financing, interest rate and other risk management needs of qualifying commercial banking customers. The notional amount of the interest rate swaps does not represent the amount exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual interest rate swap agreements. Borrowing Derivatives : Interest rate swaps with notional amounts totaling $25.0 million at both December 31, 2020 and December 31, 2019 were designated as cash flow hedges of certain FHLB advances. Loan Derivatives : In conjunction with the Carolina Alliance acquisition, Park acquired interest rate swaps related to certain commercial loans. These interest rate swaps were simultaneously hedged by offsetting interest rate swaps that Carolina Alliance executed with a third party, such that Carolina Alliance minimized its net interest rate risk exposure resulting from such transactions. These interest rate swaps had a notional amount totaling $33.3 million and $35.5 million as of December 31, 2020 and December 31, 2019, respectively. All of the Company's interest rate swaps were determined to be fully effective during the years ended December 31, 2020 and 2019 . As such, no amount of ineffectiveness has been included in net income. Therefore, the aggregate fair value of the swaps is recorded in other assets and other liabilities with changes in fair value recorded in other comprehensive income. The amount included in accumulated other comprehensive income would be reclassified to current earnings should the hedges no longer be considered effective. Park expects the hedges to remain fully effective during the remaining respective terms of the swaps. Summary information about Park's interest rate swaps as of December 31, 2020 and December 31, 2019 was as follows: December 31, 2020 December 31, 2019 (In thousands, except weighted average data) Borrowing Derivatives Loan Derivatives Borrowing Derivatives Loan Derivatives Notional amounts $ 25,000 $ 33,310 $ 25,000 $ 35,503 Weighted average pay rates 2.595 % 4.695 % 2.595 % 4.695 % Weighted average receive rates 0.218 % 4.695 % 2.002 % 4.695 % Weighted average maturity (years) 1.5 9.3 2.5 10.2 Unrealized losses $ 885 $ — $ 575 $ — Interest expense recorded on swap transactions was $423,000 and $42,000 for the years ended December 31, 2020 and 2019, respectively. No interest income or expense related to swap transactions was recorded during the year ended December 31, 2018. Interest Rate Swaps The following table presents the net gains (losses), net of income taxes, recorded in AOCI and the Consolidated Statements of Income related to interest rate swaps for the years ended December 31, 2020, 2019 and 2018 . Year ended December 31, 2020 (In thousands) Amount of Gain (Loss) Recognized in OCI (Effective Portion) Amount of Gain (Loss) Reclassified from OCI to Interest Income Amount of Gain (Loss) Recognized in Other Non-interest Income (Ineffective Portion) Interest rate contracts $ (244) $ — $ — Year ended December 31, 2019 (In thousands) Amount of Gain (Loss) Recognized in OCI (Effective Portion) Amount of Gain (Loss) Reclassified from OCI to Interest Income Amount of Gain (Loss) Recognized in Other Non-interest Income (Ineffective Portion) Interest rate contracts $ (454) $ — $ — Year ended December 31, 2018 (In thousands) Amount of Gain (Loss) Recognized in OCI (Effective Portion) Amount of Gain (Loss) Reclassified from OCI to Interest Income Amount of Gain (Loss) Recognized in Other Non-interest Income (Ineffective Portion) Interest rate contracts $ — $ — $ — The following table reflects the interest rate swaps included in the Consolidated Balance Sheets as of December 31, 2020 and 2019. (In thousands) December 31, 2020 December 31, 2019 Notional Amount Fair Value Notional Amount Fair Value Included in other assets: Borrowing derivatives - interest rate swaps related to FHLB advances $ — $ — $ — $ — Loan derivatives - instruments associated with loans Matched interest rate swaps with borrower 33,310 3,934 24,421 1,781 Matched interest rate swaps with counterparty — — 11,083 89 Total included in other assets $ 33,310 $ 3,934 $ 35,504 $ 1,870 Included in other liabilities: Borrowing derivatives - interest rate swaps related to FHLB advances $ 25,000 $ (885) $ 25,000 $ (575) Loan derivatives - instruments associated with loans Matched interest rate swaps with borrower — — 11,083 (89) Matched interest rate swaps with counterparty 33,310 (3,934) 24,421 (1,781) Total included in other liabilities $ 58,310 $ (4,819) $ 60,504 $ (2,445) Mortgage Banking Derivatives Commitments to fund mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of these mortgage loans are accounted for as free standing derivatives. In order to hedge the change in interest rates resulting from its commitments to fund the loans, the Company enters into forward commitments for the future delivery of mortgage loans when interest rate locks are entered into. These mortgage banking derivatives are not designated in hedge relationships. The fair value of the interest rate lock is recorded at the time the commitment to fund the mortgage loan is executed and is adjusted for the expected exercise of the commitment before the loan is funded. Fair values of these mortgage banking derivatives are estimated based on changes in mortgage interest rates from the date the interest on the loan is locked. Changes in the fair values of these derivatives are included in "Other service income" in the Consolidated Statements of Income. At December 31, 2020 and December 31, 2019 , Park had $58.2 million and $15.9 million, respectively, of interest rate lock commitments. The fair value of these mortgage banking derivatives was reflected by a derivative asset of $1.5 million and $221,000 at December 31, 2020 and December 31, 2019 , respectively. Other Derivatives In connection with the sale of Park’s Class B Visa shares during 2009, Park entered into a swap agreement with the purchaser of the shares. The swap agreement adjusts for dilution in the conversion ratio of Class B Visa shares resulting from certain Visa litigation. At both December 31, 2020 and 2019, the fair value of the swap liability of $226,000 was an estimate of the exposure based upon probability-weighted potential Visa litigation losses.

Share Based Compensation

Share Based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock Option Plan	Share-Based CompensationThe Park National Corporation 2013 Long-Term Incentive Plan (the "2013 Incentive Plan") was adopted by the Board of Directors of Park on January 28, 2013 and was approved by Park's shareholders at the Annual Meeting of Shareholders on April 22, 2013. The 2013 Incentive Plan made equity-based awards and cash-based awards available for grant to participants (who could have been employees or non-employee directors) in the form of incentive stock options, nonqualified stock options, SARs, restricted common shares (“Restricted Stock”), restricted stock unit awards that may be settled in common shares, cash or a combination of the two (“Restricted Stock Units”), unrestricted common shares (“Other Stock-Based Awards”) and cash-based awards. Under the 2013 Incentive Plan, 600,000 common shares were authorized to be delivered in connection with grants under the 2013 Incentive Plan. The common shares to be delivered under the 2013 Incentive Plan are to consist of either common shares currently held or common shares subsequently acquired by Park as treasury shares, including common shares purchased in the open market or in private transactions. At December 31, 2020, there were 18,695 common shares subject to unvested PBRSUs issued under the 2013 Incentive Plan, which represented the only awards outstanding under the 2013 Incentive Plan. The Park National Corporation 2017 Long-Term Incentive Plan for Employees (the "2017 Employees LTIP") was adopted by the Board of Directors of Park on January 23, 2017 and was approved by Park's shareholders at the Annual Meeting of Shareholders on April 24, 2017. The 2017 Employees LTIP makes equity-based awards and cash-based awards available for grant to employee participants in the form of incentive stock options, nonqualified stock options, SARs, Restricted Stock, Restricted Stock Units, Other Stock-Based Awards and cash-based awards. Under the 2017 Employees LTIP, 750,000 common shares are authorized to be delivered in connection with grants under the 2017 Employees LTIP. The common shares to be delivered under the 2017 Employees LTIP are to consist of either common shares currently held or common shares subsequently acquired by Park as treasury shares, including common shares purchased in the open market or in private transactions. At December 31, 2020, 525,000 common shares were available for future grants under the 2017 Employee LTIP. The Park National Corporation 2017 Long-Term Incentive Plan for Non-Employee Directors (the "2017 Non-Employee Directors LTIP") was adopted by the Board of Directors of Park on January 23, 2017 and was approved by Park's shareholders at the Annual Meeting of Shareholders on April 24, 2017. The 2017 Non-Employee Directors LTIP makes equity-based awards and cash-based awards available for grant to non-employee director participants in the form of nonqualified stock options, SARs, Restricted Stock, Restricted Stock Units, Other Stock-Based Awards, and cash-based awards. Under the 2017 Non-Employee Directors LTIP, 150,000 common shares are authorized to be delivered in connection with grants under the 2017 Non-Employee Directors LTIP. The common shares to be delivered under the 2017 Non-Employee Directors LTIP are to consist of either common shares currently held or common shares subsequently acquired by Park as treasury shares, including common shares purchased in the open market or in private transactions. At December 31, 2020, 100,250 common shares were available for future grants under the 2017 Non-Employee Directors LTIP. The 2017 Employees LTIP and the 2017 Non-Employee Directors LTIP have replaced the provisions of the 2013 Incentive Plan with respect to the grant of future awards. As a result of the approval of the 2017 Employees LTIP and the 2017 Non-Employee Directors LTIP, Park has not granted and will not grant any additional awards under the 2013 Incentive Plan after April 24, 2017. Awards made under the 2013 Incentive Plan prior to April 24, 2017 will remain in effect in accordance with their respective terms. During 2020, 2019 and 2018, Park granted 13,450, 13,500 and 11,650 common shares, respectively, to directors of Park and to directors of PNB (and its divisions) under the 2017 Non-Employee Directors LTIP. The common shares granted to directors were not subject to a vesting period and resulted in expense of $1.3 million, $1.3 million, and $1.1 million in 2020, 2019, and 2018, respectively, which is included in professional fees and services on the Consolidated Statements of Income. During 2020, the Compensation Committee of the Board of Directors of Park granted awards of PBRSUs, under the 2017 Employees LTIP, covering an aggregate of 62,265 common shares to certain employees of Park and its subsidiaries. During 2019, the Compensation Committee of the Board of Directors of Park granted awards of PBRSUs, under the 2017 Employees LTIP, covering an aggregate of 58,740 of common shares to certain employees of Park and its subsidiaries. Additionally, during 2019, Park granted awards of TBRSUs, under the 2017 Employees LTIP, covering an aggregate of 15,700 shares to Carolina Alliance Division employees. During 2018, the Compensation Committee of the Board of Directors of Park granted awards of PBRSUs covering an aggregate of 48,053 common shares, under the 2017 Employees LTIP, to certain employees of Park and its subsidiaries. Additionally, during 2018, Park granted 13,637 TBRSUs to certain NewDominion Division employees. The number of PBRSUs earned or settled will depend on the level of achievement with respect to certain performance criteria and are also subject to subsequent service-based vesting. The number of TBRSUs earned or settled are subject to service-based vesting. A summary of changes in the common shares subject to nonvested PBRSUs and TBRSUs for the years ended December 31, 2020 and 2019 follows: Common shares subject to PBRSUs and TBRSUs Nonvested at January 1, 2019 152,631 Granted 74,440 Vested (27,719) Forfeited (1,262) Adjustment for performance conditions of PBRSUs (1) (3,368) Nonvested at January 1, 2020 194,722 Granted 62,265 Vested (44,379) Forfeited (3,101) Adjustment for performance conditions of PBRSUs (1) (5,399) Nonvested at December 31, 2020 (2) 204,108 (1) The number of PBRSUs earned depends on the level of achievement with respect to certain performance criteria. Adjustment herein represents the difference between the maximum number of common shares which could be earned and the actual number earned for those PBRSUs as to which the performance period was completed. (2) Nonvested amount herein represents the maximum number of nonvested PBRSUs and TBRSUs. As of December 31, 2020, an aggregate of 186,331 PBRSUs and TBRSUs are expected to vest. During the year ended December 31, 2020, an aggregate of 7,705 of the TBRSUs granted in 2018 and 2019 vested in full due to the satisfaction of the service-based vesting requirement. A total of 2,392 common shares were withheld to satisfy employee income tax obligations. This resulted in a net number of 5,313 common shares being issued to employees of Park. Additionally, during the year ended December 31, 2020, an aggregate of 36,674 of the PBRSUs granted in 2016 and 2017 vested in full due to the level of achievement with respect to certain performance criteria and the satisfaction of the service-based vesting requirement. A total of 11,646 common shares were withheld to satisfy employee income tax withholding obligations. This resulted in a net number of 25,028 common shares being issued to employees of Park. During the three months ended March 31, 2019, 27,719 PBRSUs granted in 2015 and 2016 vested in full due to the level of achievement with respect to certain performance criteria and the satisfaction of the service-based vesting requirement. A total of 8,736 common shares were withheld to pay employee income taxes. This resulted in a net number of 18,983 common shares being issued to employees of Park. Share-based compensation expense of $6.0 million, $5.0 million and $4.0 million was recognized for the years ended December 31, 2020, 2019 and 2018, respectively, related to PBRSU and TBRSU awards to employees. The following table details expected additional share-based compensation expense related to PBRSUs and TBRSUs currently outstanding: (In thousands) 2021 $ 3,676 2022 2,439 2023 1,004 2024 160 Total $ 7,279

Benefit Plan

Benefit Plan	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Benefit Plans	Benefit Plans The Corporation has a noncontributory Defined Benefit Pension Plan (the “Pension Plan”) covering substantially all of the employees of the Corporation and its subsidiaries. The Pension Plan provides benefits based on an employee’s years of service and compensation. There was no pension contribution in 2020 or 2019 and there is no contribution expected to be made in 2021. Using accrual measurement dates of December 31, 2020 and 2019, plan assets and benefit obligation activity for the Pension Plan are listed below: (In thousands) 2020 2019 Change in fair value of plan assets Fair value at beginning of measurement period $ 210,623 $ 177,077 Actual return on plan assets 27,800 42,402 Employer contributions — — Benefits paid (7,981) (8,856) Fair value at end of measurement period $ 230,442 $ 210,623 Change in benefit obligation Projected benefit obligation at beginning of measurement period $ 154,419 $ 123,528 Service cost 8,319 5,873 Interest cost 5,283 5,491 Plan amendments — (168) Actuarial loss 24,370 28,551 Benefits paid (7,981) (8,856) Projected benefit obligation at the end of measurement period $ 184,410 $ 154,419 Funded status at end of year (fair value of plan assets less benefit obligation) $ 46,032 $ 56,204 The increase in the projected benefit obligation ("PBO") from $154.4 million as of December 31, 2019 to $184.4 million as of December 31, 2020, was largely the result of a decrease in the discount rate from 3.53% to 3.00%. Additionally, the PBO increased due to updated assumptions for withdrawal rates, retirement rates, optional payment form elections, and salary increases as well as assumptions for lump sum determinations. These losses were partially offset by the adoption of the MP 2020 mortality projection scale. The asset allocation for the Pension Plan as of each measurement date, by asset category, was as follows: Percentage of Plan Assets Asset category Target Allocation 2020 2019 Equity securities 50% - 100% 84 % 81 % Fixed income and cash equivalents remaining balance 16 % 19 % Total 100 % 100 % The investment policy, as established by the Retirement Plan Committee, is to invest assets according to the target allocation stated above. Assets will be reallocated periodically based on the investment strategy of the Retirement Plan Committee. The investment policy is reviewed periodically. The expected long-term rate of return on plan assets used to measure the benefit obligation was 7.00% at both December 31, 2020 and December 31, 2019. This return was based on the expected long-term return of each of the asset categories, weighted based on the median of the target allocation for each class. The accumulated benefit obligation for the Pension Plan was $149.5 million and $129.3 million at December 31, 2020 and 2019, respectively. On November 17, 2009, the Park Pension Plan completed the purchase of 115,800 common shares of Park for $7.0 million or $60.45 per share. At December 31, 2020 and 2019, the fair value of the 115,800 common shares held by the Pension Plan was $12.2 million, or $105.01 per share and $11.9 million, or $102.38 per share, respectively. The weighted average assumptions used to determine benefit obligations at December 31, 2020, 2019 and 2018 were as follows: 2020 2019 2018 Discount rate 3.00 % 3.53 % 4.60 % Rate of compensation increase Under age 30 8.25 % 10.00 % 10.00 % Ages 30-39 6.00 % 6.00 % 6.00 % Ages 40-49 5.00 % 4.00 % 4.00 % Ages 50-54 4.25 % 3.00 % 3.00 % Ages 55-59 3.75 % 3.00 % 3.00 % Ages 60-64 3.50 % 3.00 % 3.00 % Ages 65 and over 3.25 % 3.00 % 3.00 % The estimated future pension benefit payments reflecting expected future service for the next ten years are shown below (in thousands): 2021 $ 11,582 2022 11,798 2023 11,672 2024 12,613 2025 12,758 2026-2030 62,929 Total $ 123,352 The following table shows ending balances of accumulated other comprehensive loss at December 31, 2020 and 2019. (In thousands) 2020 2019 Prior service credit $ 152 $ 168 Net actuarial loss (43,723) (33,933) Total (43,571) (33,765) Deferred taxes 9,150 7,091 Accumulated other comprehensive loss $ (34,421) $ (26,674) Using actuarial measurement dates of December 31 for 2020, 2019 and 2018, components of net periodic benefit income and other amounts recognized in other comprehensive income were as follows: (In thousands) 2020 2019 2018 Affected Line Item in the Consolidated Statements of Income Components of net periodic benefit income (loss) and other amounts recognized in other comprehensive income (loss) Service cost $ (8,319) $ (5,873) $ (6,547) Employee benefits Interest cost (5,283) (5,491) (5,236) Other components of net periodic benefit income Expected return on plan assets 14,410 12,105 13,417 Other components of net periodic benefit income Recognized net actuarial loss and prior service cost (1,175) (1,882) (1,361) Other components of net periodic benefit income Net periodic benefit (loss) income $ (367) $ (1,141) $ 273 Net actuarial (loss) gain and prior service cost $ (10,981) $ 1,913 $ (5,122) Amortization of net loss 1,175 1,882 1,361 Total recognized in other comprehensive (loss) income (9,806) 3,795 (3,761) Total recognized in net benefit (loss) income and other comprehensive (loss) income $ (10,173) $ 2,654 $ (3,488) There are $16,000 in estimated prior service costs for the Pension Plan to be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next year. The estimated net actuarial loss expected to be recognized in the next year is $2.2 million. The weighted average assumptions used to determine net periodic benefit income (loss) for the years ended December 31, 2020, 2019 and 2018 are listed below: 2020 2019 2018 Discount rate 3.53 % 4.60 % 3.89 % Rate of compensation increase Under age 30 10.00 % 10.00 % 10.00 % Ages 30-39 6.00 % 6.00 % 6.00 % Ages 40-49 4.00 % 4.00 % 4.00 % Ages 50 and over 3.00 % 3.00 % 3.00 % Expected long-term return on plan assets 7.00 % 7.00 % 7.00 % The Pension Plan maintains cash in a PNB savings account. The Pension Plan cash balance was $2.5 million at December 31, 2020. U.S. GAAP defines fair value as the price that would be received by Park for an asset or paid by Park to transfer a liability (an exit price) in an orderly transaction between market participants on the measurement date, using the most advantageous market for the asset or liability. The fair values of equity securities, consisting of mutual fund investments and common stock (U.S. large cap) held by the Pension Plan and the fixed income and cash equivalents, are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs). The fair value of Pension Plan assets at December 31, 2020 was $230.4 million. At December 31, 2020, $195.0 million of equity investments and cash in the Pension Plan were categorized as Level 1 inputs; $35.4 million of Pension Plan investments in corporate (U.S. large cap), U.S. Government sponsored entity bonds and marketable CDs were categorized as Level 2 inputs, as fair value was based on quoted market prices of comparable instruments; and no investments were categorized as Level 3 inputs. The fair value of Pension Plan assets was $210.6 million at December 31, 2019. At December 31, 2019, $180.0 million of investments in the Pension Plan were categorized as Level 1 inputs; $30.6 million were categorized as Level 2; and no investments were categorized as Level 3. Salary Deferral Plan The Corporation has a voluntary salary deferral plan (the Corporation's Employees Stock Ownership Plan) covering substantially all of the employees of the Corporation and its subsidiaries. Eligible employees may contribute a portion of their compensation subject to a maximum statutory limitation. The Corporation provides a matching contribution established annually by the Corporation. Contribution expense for the Corporation was $4.2 million, $3.9 million, and $3.0 million for 2020, 2019 and 2018, respectively. Supplemental Executive Retirement Plan The Corporation has entered into Supplemental Executive Retirement Plan Agreements (the "SERP Agreements") with certain key officers of the Corporation and its subsidiaries which provide defined pension benefits in excess of limits imposed by federal income tax law. The accrued benefit cost for the SERP Agreements totaled $12.3 million and $11.0 million for 2020 and 2019, respectively. The expense for the Corporation was $2.1 million for 2020, $1.3 million for 2019 and $1.0 million for 2018.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Corporation’s deferred tax assets and liabilities are as follows: December 31 (In thousands) 2020 2019 Deferred tax assets: Allowance for loan losses $ 19,512 $ 12,120 Accumulated other comprehensive loss – Pension Plan 9,150 7,091 Accumulated other comprehensive loss – Unrealized losses on swaps 186 121 Deferred compensation 3,887 3,131 OREO valuation adjustments 1,012 964 Net deferred loan fees 3,283 1,451 Deferred contract bonus 571 477 Nonvested equity-based compensation 2,567 2,132 Net operating loss ("NOL") carryforward 3,629 4,094 Operating lease liability 3,561 3,097 Other 1,424 843 Total deferred tax assets $ 48,782 $ 35,521 Deferred tax liabilities: Accumulated other comprehensive loss - Unrealized gains on securities $ 10,507 $ 4,662 Fixed assets 3,360 585 Deferred investment income 6,637 6,231 Pension Plan 20,407 19,238 MSRs 2,781 2,153 Partnership adjustments 204 178 Purchase accounting adjustments 604 49 Operating lease right-of-use asset 3,343 2,932 Lessor adjustments 3,433 2,697 Other 398 488 Total deferred tax liabilities $ 51,674 $ 39,213 Net deferred tax liability $ (2,892) $ (3,692) As of December 31, 2020 and 2019, Park had a net deferred tax asset balance related to federal NOL carryforwards of approximately $3.1 million and $3.5 million, respectively, which expire at various dates from 2031-2039. Park also had a net deferred tax asset balance related to state NOL carryforwards of approximately $0.5 million and $0.6 million at December 31, 2020 and 2019, respectively, which expire at various dates from 2030-2039. Park performs an analysis to determine if a valuation allowance against deferred tax assets is required in accordance with U.S. GAAP. Management determined that it was not required to establish a valuation allowance against the December 31, 2020 or 2019 deferred tax assets in accordance with U.S. GAAP since it was more likely than not that the deferred tax asset will be fully utilized in future periods. The components of the provision for federal income taxes are shown below: December 31, (In thousands) 2020 2019 2018 Currently payable Federal $ 22,769 $ 14,797 $ 12,700 State 1,432 1,191 352 Amortization of qualified affordable housing projects 7,046 6,927 7,322 Deferred Federal (4,812) (815) 481 State 287 (29) 57 Total $ 26,722 $ 22,071 $ 20,912 The following is a reconciliation of income tax expense to the amount computed at the statutory federal corporate income tax rate of 21% for the years ended December 31, 2020, 2019 and 2018. 2020 2019 2018 Statutory federal corporate income tax rate 21.0 % 21.0 % 21.0 % Changes in rates resulting from: Tax exempt interest income, net of disallowed interest (1.5) % (2.0) % (1.8) % Bank owned life insurance (0.7) % (0.8) % (1.1) % Investments in qualified affordable housing projects, net of tax benefits (1.1) % (1.5) % (1.3) % KSOP dividend deduction (0.6) % (0.6) % (0.6) % Non-taxable gain on NewDominion common stock — % — % (0.6) % Other 0.2 % 1.6 % 0.3 % Effective Tax Rate 17.3 % 17.7 % 15.9 % Park and its subsidiaries do not pay state income tax to the state of Ohio, but pay a franchise tax based on equity. The franchise tax expense is included in "State tax expense" on Park’s Consolidated Statements of Income. Park is also subject to state income tax in various states, including North Carolina and South Carolina. State income tax expense is included in “Income taxes” on Park’s Consolidated Statements of Income. Park’s state income tax expense was $1.1 million and $1.2 million for the years ended December 31, 2020 and 2019, respectively. Unrecognized Tax Benefits The following is a reconciliation of the beginning and ending amount of unrecognized tax benefits. (In thousands) 2020 2019 2018 January 1 Balance $ 954 $ 1,226 $ 664 Additions based on tax positions related to the current year 12 12 10 Additions for tax positions of prior years — 2 781 Reductions for tax positions of prior years — (3) — Reductions due to statute of limitations (333) (283) (229) December 31 Balance $ 633 $ 954 $ 1,226 The amount of unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in the future periods at December 31, 2020, 2019 and 2018 was $0.6 million, $0.9 million and $1.1 million, respectively. Park does not expect the total amount of unrecognized tax benefits to significantly increase or decrease during the next year. The income (expense) related to interest and penalties recorded on unrecognized tax benefits in the Consolidated Statements of Income for the years ended December 31, 2020, 2019, and 2018 was $35,000, $7,500, and $(79,500), respectively. The amount accrued for interest and penalties at December 31, 2020, 2019 and 2018 was $111,000, $146,000 and $153,500, respectively. Park and its subsidiaries are subject to U.S. federal income tax and income tax in various state jurisdictions. The Corporation is subject to routine audits of tax returns by the Internal Revenue Service and states in which we conduct business. No material adjustments have been made on closed federal and state tax audits. Generally, all tax years ended prior to December 31, 2017 are closed to examination by federal and state taxing authorities.

Other Comprehensive Income

Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Other comprehensive income (loss) components, net of income tax, are shown in the following table for the years ended December 31, 2020, 2019 and 2018. Year ended December 31, Changes in Pension Plan assets and benefit obligations Unrealized gains (losses) on AFS debt securities Unrealized net holding loss on cash flow hedge Total Beginning balance at January 1, 2020 $ (26,674) $ 17,539 $ (454) $ (9,589) Other comprehensive (loss) income before reclassifications (8,675) 25,747 (244) $ 16,828 Amounts reclassified from accumulated other comprehensive loss (income) 928 (2,596) — $ (1,668) Net current period other comprehensive (loss) income $ (7,747) $ 23,151 $ (244) $ 15,160 Ending balance at December 31, 2020 $ (34,421) $ 40,690 $ (698) $ 5,571 Beginning balance at January 1, 2019 $ (29,672) $ (20,116) $ — $ (49,788) Other comprehensive income (loss) before reclassifications (1) 1,511 37,322 (454) $ 38,379 Amounts reclassified from accumulated other comprehensive loss 1,487 333 — $ 1,820 Net current period other comprehensive income (loss) $ 2,998 $ 37,655 $ (454) $ 40,199 Ending balance at December 31, 2019 $ (26,674) $ 17,539 $ (454) $ (9,589) Beginning balance at January 1, 2018, as previously presented $ (23,526) $ (2,928) $ — $ (26,454) Cumulative effect of change in accounting principle for marketable equity securities, net of tax — (995) — (995) Beginning balance at January 1, 2018, as adjusted (23,526) (3,923) — (27,449) Reclassification of disproportionate income tax effects (3,175) (631) — (3,806) Net current period activity Other comprehensive loss before reclassifications (4,046) (17,586) — (21,632) Amounts reclassified from accumulated other comprehensive loss 1,075 2,024 — 3,099 Net current period other comprehensive loss (2,971) (15,562) — (18,533) Ending balance at December 31, 2018 $ (29,672) $ (20,116) $ — $ (49,788) (1) During the year ended December 31, 2019, Park transferred HTM securities with a fair value of $373.9 million to AFS classification. The transfer occurred at fair value and had a related unrealized gain of $24.2 million ($19.1 million net of taxes), recorded in other comprehensive income. The following table provides information concerning amounts reclassified out of accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018: Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in the Consolidated Statements of Income (In thousands) 2020 2019 2018 Amortization of defined benefit pension items Amortization of net loss $ 1,175 1,882 1,361 Employee benefits Income before income taxes 1,175 1,882 1,361 Income before income taxes Income taxes 247 395 286 Income taxes Net of income tax $ 928 $ 1,487 $ 1,075 Net income Unrealized gains & losses on AFS debt securities (Gain) loss on the sale of debt securities $ (3,286) $ 421 $ 2,562 Net gain (loss) on the sale of debt securities (Income) loss before income taxes (3,286) 421 2,562 Income before income taxes Income tax (benefit) expense (690) 88 538 Income taxes Net of income (benefit) tax $ (2,596) $ 333 $ 2,024 Net income

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share U.S. GAAP requires the reporting of basic and diluted earnings per common share. Basic earnings per common share excludes any dilutive effects of PBRSUs and TBRSUs. The following table sets forth the computation of basic and diluted earnings per common share: Year ended December 31 2020 2019 2018 Numerator: Net income $ 127,923 $ 102,700 $ 110,387 Denominator: Weighted-average common shares outstanding 16,302,825 16,234,342 15,488,982 Effect of dilutive PBRSUs and TBRSUs 104,677 95,114 122,507 Weighted-average common shares outstanding adjusted for the effect of dilutive PBRSUs and TBRSUs 16,407,502 16,329,456 15,611,489 Earnings per common share: Basic earnings per common share $ 7.85 $ 6.33 $ 7.13 Diluted earnings per common share $ 7.80 $ 6.29 $ 7.07 Park awarded 62,265, 58,740 and 48,053 PBRSUs to certain employees during the years ended December 31, 2020, 2019 and 2018, respectively. Park awarded 15,700 TBRSUs to Carolina Alliance Division employees during the year ended December 31, 2019 and awarded 13,637 TBRSUs to NewDominion Division employees during the year ended December 31, 2018. On April 1, 2019, Park issued 1,037,205 common shares to complete its acquisition of Carolina Alliance. On July 1, 2018, Park issued 435,457 common shares to complete its acquisition of NewDominion. These common shares are included in average common shares outstanding beginning on those dates. During the years ended December 31, 2020, 2019 and 2018, Park repurchased 76,000, 86,650 and 50,000 common shares, respectively, to fund the PBRSUs, TBRSUs and common shares awarded to directors of Park and to directors of PNB (and its divisions) and repurchased 334,603 common shares during the year ended December 31, 2019 pursuant to Park's previously announced stock repurchase authorizations.

Dividend Restrictions

Dividend Restrictions	12 Months Ended
	Dec. 31, 2020
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Dividend Restrictions	Dividend RestrictionsBank regulators limit the amount of dividends a subsidiary bank can declare in any calendar year without obtaining prior approval. At December 31, 2020, approximately $101.8 million of the total shareholders’ equity of PNB was available for the payment of dividends to the Corporation, without approval by the applicable regulatory authorities.

Financial Instruments With Off-

Financial Instruments With Off-Balance Sheet Risk and Financial Instruments With Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2020
Risks and Uncertainties [Abstract]
Financial Instruments with Off-Balance Sheet Risk and Financial Instruments with Concentration of Credit Risk	Financial Instruments with Off-Balance Sheet Risk and Financial Instruments with Concentrations of Credit Risk The Corporation is 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 loan commitments and standby letters of credit. The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated financial statements. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for loan commitments and standby letters of credit is represented by the contractual amount of those instruments. The Corporation uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Since many of the loan commitments may expire without being drawn upon, the total commitment amount does not necessarily represent future cash requirements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan commitments to customers. The total amounts of off-balance sheet financial instruments with credit risk were as follows: December 31 (In thousands) 2020 2019 Loan commitments $ 1,372,182 $ 1,309,896 Standby letters of credit 17,015 17,195 The loan commitments are generally for variable rates of interest. The Corporation grants retail, commercial and commercial real estate loans to customers primarily located in Ohio, Kentucky, North Carolina and South Carolina with the exception of nationwide aircraft loans and nationwide asset-based lending to consumer finance companies. The Corporation evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Corporation upon the extension of credit, is based on management’s credit evaluation of the customer. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, and real estate. Although the Corporation has a diversified loan portfolio, a substantial portion of the borrowers’ ability to honor their contracts is dependent upon the economic conditions the borrowers' respective geographic locations and industries.

Loan Servicing

Loan Servicing	12 Months Ended
	Dec. 31, 2020
Transfers and Servicing of Financial Assets [Abstract]
Loan Servicing	Loan Servicing Park serviced sold mortgage loans of $1,972 million at December 31, 2020, compared to $1,447 million at December 31, 2019 and $1,389 million at December 31, 2018. At December 31, 2020, $1.7 million of the sold mortgage loans were sold with recourse compared to $2.3 million at December 31, 2019 and $2.5 million at December 31, 2018. Management closely monitors the delinquency rates on the mortgage loans sold with recourse. As of December 31, 2020 and 2019, management had established a reserve of $30,000 and $25,000, respectively, to account for future loan repurchases. When Park sells mortgage loans with servicing rights retained, servicing rights are initially recorded at fair value. Park selected the “amortization method” as permissible within U.S. GAAP, whereby the servicing rights capitalized are amortized in proportion to and over the period of estimated future servicing income of the underlying loan. At the end of each reporting period, the carrying value of MSRs is assessed for impairment with a comparison to fair value. MSRs are carried at the lower of their amortized cost or fair value. The amortization of MSRs is included within other service income in the Consolidated Statements of Income. Activity for MSRs and the related valuation allowance follows: December 31 (In thousands) 2020 2019 2018 MSRs: Carrying amount, net, beginning of year $ 10,070 $ 10,178 $ 9,688 Additions 8,627 2,355 1,591 Amortization (4,123) (1,870) (1,499) Change in valuation allowance (2,364) (593) 398 Carrying amount, net, end of year $ 12,210 $ 10,070 $ 10,178 Valuation allowance: Beginning of year $ 825 $ 232 $ 630 Change in valuation allowance 2,364 593 (398) End of year $ 3,189 $ 825 $ 232 The fair value of MSRs was $12.2 million and $10.1 million at December 31, 2020 and 2019, respectively. The fair value of MSRs at December 31, 2020 was established using a discount rate of 12% and constant prepayment speeds ranging from 13.20% to 27.54%. The fair value of MSRs at December 31, 2019 was established using a discount rate of 12% and constant prepayment speeds ranging from 6.60% to 18.42%. Servicing fees included in other service income were $4.1 million, $3.6 million and $3.6 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lessee, Operating Leases	Leases Park is a lessee in several noncancellable operating lease arrangements, primarily for retail branches, administrative and warehouse buildings, ATMs, and certain office equipment within its Ohio, North Carolina, South Carolina, and Kentucky markets. Certain of these leases contain renewal options for periods ranging from one year to five years. Park’s leases generally do not include termination options for either party to the lease or restrictive financial or other covenants. Payments due under the lease contracts include fixed payments plus, for many of Park’s real estate leases, variable payments such as Park's proportionate share of property taxes, insurance, and common area maintenance. The Company adopted ASU 2016-02, Leases (ASC 842), using the modified retrospective method as of the date of adoption, January 1, 2019, as permitted by the amendments in ASU 2018-11. As a result, the Company was not required to adjust its comparative period financial information for effects of the adoption of the standard or make the new required lease disclosures for periods prior to the effective date. Upon adoption of this accounting guidance on January 1, 2019, Park recorded an initial ROU asset of $11.0 million, and a lease liability of $11.8 million, and reclassified an existing deferred rent liability of $0.6 million. The impact to the Company's retained earnings, net of the tax impact, was $143,000. Management elected to adopt the package of transition practical expedients and, therefore, has not reassessed (1) whether existing or expired contracts contain a lease, (2) the lease classification for existing or expired leases or (3) the accounting for initial direct costs that were previously capitalized. The Company did not elect the practical expedient to use hindsight for leases existing at the adoption date. Park elected the practical expedient, by class of underlying asset, to not separate non-lease components from the associated lease components. Additionally, Park has elected not to recognize ROU assets and lease liabilities for short-term leases that have a lease term of 12 months or less. The Company recognizes the lease payments associated with its short-term leases as an expense on a cash basis. Management determines if an arrangement is or contains a lease at contract inception. If an arrangement is determined to be or contain a lease, Park recognizes a ROU asset and a lease liability at the lease commencement date. Leases are classified as operating or finance leases at the lease commencement date. At December 31, 2020 and 2019, all of Park's leases were classified as operating leases. Park’s lease liability is initially and subsequently measured at the present value of the unpaid lease payments at the lease commencement date. Key estimates and judgments related to the lease liability include how management determines (1) the discount rate it uses to discount the unpaid lease payments to present value, (2) the lease term, and (3) lease payments. • ASC 842 requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that rate cannot be readily determined, its incremental borrowing rate. Generally, management cannot determine the interest rate implicit in the lease because it does not have access to the lessor’s estimated residual value or the amount of the lessor’s deferred initial direct costs. Therefore, Park utilizes its incremental borrowing rate as the discount rate for leases. Park’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. To manage its capital and liquidity needs, Park periodically obtains wholesale funding from the FHLB on an over-collateralized basis. The impact of utilizing an interest rate on an over-collateralized borrowing versus a fully collateralized borrowing is not material. Therefore, the FHLB yield curve was selected by management as a baseline to determine Park’s discount rates for leases. • The lease term for all of the Company’s leases includes the noncancellable period of the lease plus any additional periods covered by either Park's option to extend (or not to terminate) the lease that the Company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. If a lease contract contains multiple renewal options, management generally models lease cash flows through the first renewal option period unless the contract contains economic incentives or other conditions that increase or decrease the likelihood that additional renewals are reasonably certain to be exercised. • Lease payments included in the measurement of the lease liability are comprised of the following: – Fixed payments, including in-substance fixed payments, owed over the lease term; – For certain of Park's gross real estate leases, non-lease components such as real estate taxes, insurance, and common area maintenance; and – Variable lease payments that depend on an index or rate, initially measured using the index or rate at the lease commencement date. The ROU asset is initially measured at cost, which comprises the initial amount of the lease liability adjusted for lease payments made at or before the lease commencement date, plus any initial direct costs incurred less any lease incentives received. For operating leases, the ROU asset is subsequently measured throughout the lease term at the carrying amount of the lease liability, plus initial direct costs, plus (minus) any prepaid (accrued) lease payments, less the unamortized balance of lease incentives received. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Park's operating lease ROU asset and lease liability are presented in “Operating lease right-of-use asset" and "Operating lease liability," respectively, on Park's Consolidated Balance Sheets. The carrying amounts of Park's ROU asset and lease liability at December 31, 2020 were $15.1 million and $16.1 million, respectively. At December 31, 2019, the carrying amounts of Park's ROU assets and lease liability were $13.7 million and $14.5 million, respectively. Park's operating lease expense is recorded in "Occupancy expense" on the Company's Consolidated Statements of Income. Other information related to operating leases for the years ended December 31, 2020 and 2019 follows: (Dollars in thousands) Year ended December 31, 2020 Year ended December 31, 2019 Lease cost Operating lease cost $ 3,463 $ 3,165 Sublease income (352) (383) Total lease cost $ 3,111 $ 2,782 Other information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,553 $ 3,192 ROU assets obtained in exchange for new operating lease liabilities 7,821 505 Reductions to ROU assets resulting from reductions to lease obligations $ (3,084) $ (2,855) At both December 31, 2020 and 2019, Park's operating leases had a weighted average remaining term of 7.2 years. The weighted average discount rate of Park's operating leases was 2.3% and 3.1% at December 31, 2020 and 2019, respectively. Undiscounted cash flows included in lease liabilities at December 31, 2020 have expected contractual payments as follows: (in thousands) December 31, 2020 2021 $ 3,062 2022 2,955 2023 2,840 2024 1,755 2025 1,415 Thereafter 5,404 Total undiscounted minimum lease payments $ 17,431 Less: imputed interest (1,378) Total lease liabilities $ 16,053

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Values	Fair Value The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that Park uses to measure fair value are as follows: • Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that Park has the ability to access as of the measurement date. • Level 2: Level 1 inputs for assets or liabilities that are not actively traded. Also consists of an observable market price for a similar asset or liability. This includes the use of “matrix pricing” to value debt securities absent the exclusive use of quoted prices. • Level 3: Consists of unobservable inputs that are used to measure fair value when observable market inputs are not available. This could include the use of internally developed models, financial forecasting and similar inputs. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the balance sheet date. When possible, the Company looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to observable market data for similar assets and liabilities. However, certain assets and liabilities are not traded in observable markets and Park must use other valuation methods to develop a fair value. The fair value of impaired loans is typically based on the fair value of the underlying collateral, which is estimated through third-party appraisals in accordance with Park's valuation requirements under its commercial and real estate loan policies. Assets and Liabilities Measured at Fair Value on a Recurring Basis : The following table presents assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements at December 31, 2020 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2020 Assets Investment securities: Obligations of states and political subdivisions $ — $ 305,218 $ — $ 305,218 U.S. Government sponsored entities’ asset-backed securities — 752,109 — 752,109 Corporate debt securities — 2,014 — $ 2,014 Equity securities 2,026 — 485 2,511 Mortgage loans held for sale — 31,666 — 31,666 Mortgage IRLCs — 1,545 — 1,545 Loan interest rate swaps — 3,934 — 3,934 Liabilities Fair value swap $ — $ — $ 226 $ 226 Borrowing interest rate swap — 885 — $ 885 Loan interest rate swaps — 3,934 — $ 3,934 Fair Value Measurements at December 31, 2019 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2019 Assets Investment securities: Obligations of states and political subdivisions — 320,491 — $ 320,491 U.S. Government sponsored entities’ asset-backed securities $ — $ 889,210 $ — $ 889,210 Equity securities 1,537 — 456 1,993 Mortgage loans held for sale — 12,278 — 12,278 Mortgage IRLCs — 221 — 221 Loan interest rate swaps — 1,870 — $ 1,870 Liabilities Fair value swap $ — $ — $ 226 $ 226 Borrowing interest rate swap — 575 — $ 575 Loan interest rate swaps — 1,870 — $ 1,870 The following methods and assumptions were used by the Company in determining the fair value of the financial assets and liabilities discussed above: Interest rate swaps: The fair values of interest rate swaps are based on valuation models using observable market data as of the measurement date (Level 2). Investment securities: Fair values for investment securities are based on quoted market prices, where available (Level 1). If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments (Level 2). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows (Level 3). Fair value swap: The fair value of the swap agreement entered into with the purchaser of the Visa Class B shares represents an internally developed estimate of the exposure based upon probability-weighted potential Visa litigation losses. Mortgage Interest Rate Lock Commitments: Mortgage IRLCs are based on current secondary market pricing and are classified as Level 2. Mortgage loans held for sale: Mortgage loans held for sale are carried at their fair value. Mortgage loans held for sale are estimated using market prices for similar product types and, therefore, are classified in Level 2. The table below is a reconciliation of the beginning and ending balances of the Level 3 inputs for the years ended December 31, 2020 and 2019, for financial instruments measured on a recurring basis and classified as Level 3: Level 3 Fair Value Measurements (In thousands) Equity Securities Fair Value Swap Balance at January 1, 2020 $ 456 $ (226) Total Gains (Losses) Included in other income 29 — Balance at December 31, 2020 $ 485 $ (226) Balance at January 1, 2019 $ 424 $ (226) Total Gains (Losses) Included in other income 32 — Balance at December 31, 2019 $ 456 $ (226) Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis: The following methods and assumptions were used by the Company in determining the fair value of assets and liabilities measured at fair value on a nonrecurring basis as described below: Impaired Loans: At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Collateral dependent impaired loans carried at fair value have been partially charged-off or receive specific allocations of the allowance for loan losses. For collateral dependent loans, fair value is generally based on real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including the comparable sales approach and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments result in a Level 3 classification of the inputs for determining fair value. Collateral is then adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and the client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted accordingly. Additionally, updated independent valuations are obtained annually for all impaired loans in accordance with Company policy. OREO: Assets acquired through or in lieu of loan foreclosure are initially recorded at fair value less costs to sell when acquired. The carrying value of OREO is not re-measured to fair value on a recurring basis, but is subject to fair value adjustments when the carrying value exceeds the fair value, less estimated selling costs. Fair value is based on recent real estate appraisals and is updated at least annually. These appraisals may utilize a single valuation approach or a combination of approaches including the comparable sales approach and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments result in a Level 3 classification of the inputs for determining fair value. Appraisals for both collateral dependent impaired loans and OREO are performed by licensed appraisers. Appraisals are generally obtained to support the fair value of collateral. In general, there are three types of appraisals received by the Company: real estate appraisals, income approach appraisals, and lot development loan appraisals. These are discussed below: • Real estate appraisals typically incorporate measures such as recent sales prices for comparable properties. Appraisers may make adjustments to the sales prices of the comparable properties as deemed appropriate based on the age, condition or general characteristics of the subject property. Management generally applies a 15% discount to real estate appraised values which management expects will cover all disposition costs (including selling costs). This 15% discount is based on historical discounts to appraised values on sold OREO properties. • Income approach appraisals typically incorporate the annual net operating income of the business divided by an appropriate capitalization rate, as determined by the appraiser. Management generally applies a 15% discount to income approach appraised values which management expects will cover all disposition costs (including selling costs). • Lot development loan appraisals are typically performed using a discounted cash flow analysis. Appraisers determine an anticipated absorption period and a discount rate that takes into account an investor’s required rate of return based on recent comparable sales. Management generally applies a 6% discount to lot development appraised values, which is an additional discount above the net present value calculation included in the appraisal, to account for selling costs. Other repossessed assets: Other repossessed assets are initially recorded at fair value less costs to sell when acquired. The carrying value of other repossessed assets is not re-measured to fair value on a recurring basis, but is subject to fair value adjustments when the carrying value exceeds the fair value, less estimated selling costs. As of December 31, 2020 and 2019, other repossessed assets primarily consisted of aircraft acquired as part of a loan workout. Fair value is based on Aircraft Bluebook and VREF Aircraft Value Reference values based on the model of aircraft and adjustments for flight hours, features and other variables. Such adjustments result in a Level 3 classification of the inputs for determining fair value. MSRs: MSRs are carried at the lower of cost or fair value. MSRs do not trade in active, open markets with readily observable prices. For example, sales of MSRs do occur, but precise terms and conditions typically are not readily available. As such, management, with the assistance of a third-party specialist, determines fair value based on the discounted value of the future cash flows estimated to be received. Significant inputs include the discount rate and assumed prepayment speeds. The calculated fair value is then compared to market values where possible to ascertain the reasonableness of the valuation in relation to current market expectations for similar products. Accordingly, MSRs are classified as Level 2. The following tables present assets and liabilities measured at fair value on a nonrecurring basis. Collateral dependent impaired loans are carried at fair value if they have been charged down to fair value or if a specific valuation allowance has been established. As of December 31, 2020 and 2019, there were no PCI loans carried at fair value. A new cost basis is established at the time a property is initially recorded in OREO. OREO properties are carried at fair value if a devaluation has been taken with respect to the property's value subsequent to the initial measurement. Fair Value Measurements at December 31, 2020 Using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2020 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 6,749 $ 6,749 Residential real estate — — 175 175 Total impaired loans recorded at fair value $ — $ — $ 6,924 $ 6,924 MSRs $ — $ 12,179 $ — $ 12,179 OREO recorded at fair value: Commercial real estate — — — — Residential real estate — — 735 735 Total OREO recorded at fair value $ — $ — $ 735 $ 735 Other repossessed assets $ — $ — $ 3,164 $ 3,164 Fair Value Measurements at December 31, 2019 Using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2019 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 1,873 $ 1,873 Residential real estate — — 217 217 Total impaired loans recorded at fair value $ — $ — $ 2,090 $ 2,090 MSRs $ — $ 5,797 $ — $ 5,797 OREO recorded at fair value: Commercial real estate — — 2,295 2,295 Residential real estate — — 738 738 Total OREO recorded at fair value $ — $ — $ 3,033 $ 3,033 Other repossessed assets $ — $ — $ 3,599 $ 3,599 The table below provides additional detail on those impaired loans which are recorded at fair value as well as the remaining impaired loan portfolio not included above. The remaining impaired loans consist of loans which are not collateral dependent as well as loans carried at cost as the fair value of the underlying collateral or the present value of expected future cash flows on each of the loans exceeded the book value for each respective credit. December 31, 2020 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 8,256 $ 269 $ 1,332 $ 6,924 Remaining impaired loans 100,199 386 4,102 96,097 Total impaired loans $ 108,455 $ 655 $ 5,434 $ 103,021 December 31, 2019 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 2,167 $ 313 $ 77 $ 2,090 Remaining impaired loans 75,324 406 5,153 70,171 Total impaired loans $ 77,491 $ 719 $ 5,230 $ 72,261 The expense from credit adjustments related to impaired loans carried at fair value for the years ended December 31, 2020, 2019 and 2018 was $4.7 million, $0.2 million, and $0.4 million, respectively. MSRs totaled $12.2 million at December 31, 2020. Of this $12.2 million MSR carrying balance, $12.2 million was recorded at fair value and included a valuation allowance of $3.2 million. The remaining $31,000 was recorded at cost, as the fair value exceeded cost at December 31, 2020. At December 31, 2019, MSRs totaled $10.1 million. Of this $10.1 million MSR carrying balance, $5.8 million was recorded at fair value and included a valuation allowance of $0.8 million. T he remaining $4.3 million was recorded at cost, as the fair value exceeded cost at December 31, 2019. The (expense) income related to MSRs carried at fair value for the years ended December 31, 2020, 2019 and 2018 was $(2.4) million, $(0.6) million and $0.4 million, respectively. Total OREO held by Park at December 31, 2020 and 2019 was $1.4 million and $4.0 million, respectively. Approximately 51% and 75% of OREO held by Park at December 31, 2020 and 2019, respectively, was carried at fair value due to fair value adjustments made subsequent to the initial OREO measurement. At December 31, 2020 and 2019, OREO held at fair value, less estimated selling costs, amounted to $735,000 and $3.0 million, respectively. The net income (expense) related to OREO fair value adjustments was $0.1 million, $(0.2) million and $(0.5) million for the years ended December 31, 2020, 2019 and 2018, respectively. Other repossessed assets totaled $3.6 million at December 31, 2020, of which $3.2 million were recorded at fair value. Other repossessed asset totaled $4.2 million at December 31, 2019, of which $3.6 million were recorded at fair value. The net expense related to other repossessed asset fair value adjustments was $435,000 for th e year ended December 31, 2020. There was no expense related to fair value adjustments on other repossessed assets for the year ended December 31, 2019. The net expense related to other repossessed asset fair value adjustments was $269,000 for the year ended December 31, 2018. The following tables present quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2020 and December 31, 2019: December 31, 2020 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 6,749 Sales comparison approach Adj to comparables 0.0% - 139.0% (11.8%) Income approach Capitalization rate 9.3% - 20.0% (10.3%) Cost approach Entrepreneurial profit 10.0% (10.0%) Cost approach Accumulated depreciation 2.6% (2.6%) Residential real estate $ 175 Sales comparison approach Adj to comparables 2.0% - 47.8% (11.9%) Other real estate owned: Residential real estate $ 735 Sales comparison approach Adj to comparables 7.8% - 9.9% (8.9%) December 31, 2019 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 1,873 Sales comparison approach Adj to comparables 0.0% - 56.0% (26.5%) Cost approach Accumulated depreciation 93.1% (93.1%) Residential real estate $ 217 Sales comparison approach Adj to comparables 0.0% - 53.5% (10.8%) Other real estate owned: Commercial real estate $ 2,295 Sales comparison approach Adj to comparables 0.9% - 68.4% (34.7%) Income approach Capitalization rate 13.0% (13.0%) Residential real estate $ 738 Sales comparison approach Adj to comparables 4.6% - 54.6% (39.2%) Assets Measured at Net Asset Value: Park's portfolio of equity investments in limited partnerships which provide mezzanine funding ("Partnership Investments") are valued using the NAV practical expedient in accordance with ASC 820. As of December 31, 2020 and December 31, 2019, Park had Partnerships Investments with a NAV of $15.4 million and $11.9 million, respectively. As of December 31, 2020 and December 31, 2019, Park had $6.2 million and $8.5 million in unfunded commitments related to these Partnership Investments. For the years ended December 31, 2020, 2019 and 2018, Park recognized income of $2.4 million, $4.8 million and $1.4 million, respectively, related to these Partnership Investments. The fair value of financial instruments at December 31, 2020 and December 31, 2019, was as follows: December 31, 2020 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 370,474 $ 370,474 $ — $ — $ 370,474 Investment securities (1) 1,059,341 — 1,059,341 — 1,059,341 Other investment securities (2) 2,511 2,026 — 485 2,511 Mortgage loans held for sale 31,666 — 31,666 — 31,666 Mortgage IRLCs 1,545 — 1,545 — 1,545 Impaired loans carried at fair value 6,924 — — 6,924 6,924 Other loans, net 7,051,975 — — 7,072,339 7,072,339 Loans receivable, net $ 7,092,110 $ — $ 33,211 $ 7,079,263 $ 7,112,474 Financial liabilities: Time deposits $ 864,573 $ — $ 870,804 $ — $ 870,804 Other 1,379 1,379 — — 1,379 Deposits (excluding demand deposits) $ 865,952 $ 1,379 $ 870,804 $ — $ 872,183 Short-term borrowings $ 342,230 $ — $ 342,230 $ — $ 342,230 Long-term debt 32,500 — 31,376 — 31,376 Subordinated notes 187,774 — 179,147 — 179,147 Derivative financial instruments - assets: Loan interest rate swaps 3,934 — 3,934 — 3,934 Derivative financial instruments - liabilities: Fair value swap $ 226 $ — $ — $ 226 $ 226 Borrowing interest rate swap 885 — 885 — 885 Loan interest rate swaps 3,934 — 3,934 — 3,934 (1) Includes AFS debt securities. (2) Excludes FHLB stock and FRB stock which are carried at their respective redemption values, investment securities accounted for at modified cost as these investments do not have a readily determinable fair value, and Partnership Investments valued using the NAV practical expedient. December 31, 2019 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 159,956 $ 159,956 $ — $ — $ 159,956 Investment securities (1) 1,209,701 — 1,209,701 — 1,209,701 Other investment securities (2) 1,993 1,537 — 456 1,993 Loans held for sale 12,278 — 12,278 — 12,278 Mortgage IRLCs 221 — 221 — 221 Impaired loans carried at fair value 2,090 — — 2,090 2,090 Other loans, net 6,430,136 — — 6,426,869 6,426,869 Loans receivable, net $ 6,444,725 $ — $ 12,499 $ 6,428,959 $ 6,441,458 Financial liabilities: Time deposits $ 1,139,131 $ — $ 1,145,537 $ — $ 1,145,537 Other 1,273 1,273 — — 1,273 Deposits (excluding demand deposits) $ 1,140,404 $ 1,273 $ 1,145,537 $ — $ 1,146,810 Short-term borrowings $ 230,657 $ — $ 230,657 $ — $ 230,657 Long-term debt 192,500 — 200,726 — 200,726 Subordinated notes 15,000 — 14,372 — 14,372 Derivative financial instruments - assets: Loan interest rate swaps 1,870 — 1,870 — 1,870 Derivative financial instruments - liabilities: Fair value swap $ 226 $ — $ — $ 226 $ 226 Borrowing interest rate swap 575 — 575 — 575 Loan interest rate swaps 1,870 — 1,870 — 1,870 (1) Includes AFS debt securities and HTM debt securities. (2) Excludes FHLB stock and FRB stock which are carried at their respective redemption values, investment securities accounted for at modified cost as these investments do not have a readily determinable fair value, and Partnership Investments valued using the NAV practical expedient.

Capital Ratios

Capital Ratios	12 Months Ended
	Dec. 31, 2020
Banking Regulation, Total Capital [Abstract]
Capital Ratios	Capital Ratios Financial institution regulators have established guidelines for minimum capital ratios for banks, thrifts and bank holding companies. During the first quarter of 2015, Park adopted the Basel III regulatory capital framework as approved by the federal banking agencies. The adoption of this framework modified the calculation of the various capital ratios, added an additional ratio, common equity tier 1, and revised the adequately and well-capitalized thresholds under the prompt corrective action regulations applicable to PNB. Additionally, under this framework, in order to avoid limitations on capital distributions, including dividend payments and stock repurchases, Park must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. The capital conservation buffer was fully phased in at 2.50% on January 1, 2019. The following amount shown as the adequately capitalized ratio plus the capital conservation buffer includes the 2.50% buffer. The Federal Reserve Board also adopted requirements Park must maintain to be deemed "well-capitalized" and to remain a financial holding company. Each of PNB and Park met all of the well-capitalized ratio guidelines applicable to it at December 31, 2020. The following table indicates the capital ratios for PNB and Park at December 31, 2020 and 2019. As of December 31, 2020 Leverage Tier 1 Common Equity Tier 1 Total PNB 8.59 % 10.66 % 10.66 % 12.16 % Park 9.63 % 11.92 % 11.72 % 15.43 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio - PNB 5.00 % 8.00 % 6.50 % 10.00 % Well-capitalized ratio - Park N/A 6.00 % N/A 10.00 % As of December 31, 2019 Leverage Tier 1 Common Equity Tier 1 Total PNB 8.62 % 11.05 % 11.05 % 12.25 % Park 9.64 % 12.33 % 12.11 % 13.19 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio - PNB 5.00 % 8.00 % 6.50 % 10.00 % Well-capitalized ratio - Park N/A 6.00 % N/A 10.00 % The following table reflects various measures of capital for Park and PNB: To Be Adequately Capitalized To Be Well-Capitalized (In thousands) Actual Amount Ratio Amount Ratio Amount Ratio At December 31, 2020 Total Risk-Based Capital PNB $ 891,585 12.16 % $ 586,764 8.00 % $ 733,455 10.00 % Park 1,137,305 15.43 % 589,619 8.00 % 737,023 10.00 % Tier 1 Risk-Based Capital PNB $ 782,148 10.66 % $ 440,073 6.00 % $ 586,764 8.00 % Park 878,740 11.92 % 442,214 6.00 % 442,214 6.00 % Leverage Ratio PNB $ 782,148 8.59 % $ 364,079 4.00 % $ 455,098 5.00 % Park 878,740 9.63 % 365,143 4.00 % N/A N/A Common Equity Tier 1 PNB $ 782,148 10.66 % $ 330,055 4.50 % $ 476,746 6.50 % Park 863,740 11.72 % 331,661 4.50 % N/A N/A At December 31, 2019 Total Risk-Based Capital PNB $ 810,880 12.25 % $ 529,480 8.00 % $ 661,850 10.00 % Park 877,108 13.19 % 532,169 8.00 % 665,211 10.00 % Tier 1 Risk-Based Capital PNB $ 731,071 11.05 % $ 397,110 6.00 % $ 529,480 8.00 % Park 820,312 12.33 % 399,127 6.00 % 399,127 6.00 % Leverage Ratio PNB $ 731,071 8.62 % $ 339,092 4.00 % $ 423,866 5.00 % Park 820,312 9.64 % 340,412 4.00 % N/A N/A Common Equity Tier 1 PNB 731,071 11.05 % 297,832 4.50 % 430,202 6.50 % Park 805,312 12.11 % 299,345 4.50 % N/A N/A

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Information	Segment Information The Corporation is a financial holding company headquartered in Newark, Ohio. The operating segments for the Corporation are PNB and GFSC. "All Other", which primarily consists of Park as the "Parent Company" and SEPH, is shown to reconcile the segment totals to the consolidated statements of income. U.S. GAAP requires management to disclose information about the different types of business activities in which a company engages and also information on the different economic environments in which a company operates, so that the users of the financial statements can better understand a company’s performance, better understand the potential for future cash flows, and make more informed judgments about the company as a whole. Park’s current operating segments are in line with U.S. GAAP as: (i) discrete financial information is available for each operating segment and (ii) the segments are aligned with internal reporting to Park’s Chief Executive Officer, who is the chief operating decision-maker. Operating results for the year ended December 31, 2020 (In thousands) PNB GFSC All Other Total Net interest income (expense) $ 326,375 $ 3,785 $ (2,530) $ 327,630 Provision for (recovery of) loan losses 30,813 196 (18,955) 12,054 Other income 124,231 255 1,178 125,664 Other expense 268,938 2,402 15,255 286,595 Income before income taxes 150,855 1,442 2,348 154,645 Income tax expense (benefit) 27,125 303 (706) 26,722 Net income $ 123,730 $ 1,139 $ 3,054 $ 127,923 Balances at December 31, 2020 Assets $ 9,236,915 $ 12,431 $ 29,675 $ 9,279,021 Loans 7,165,840 12,757 (812) 7,177,785 Deposits 7,820,983 2,273 (250,898) 7,572,358 Operating results for the year ended December 31, 2019 (In thousands) PNB GFSC All Other Total Net interest income (expense) $ 293,130 $ 5,013 $ (406) $ 297,737 Provision for (recovery of) loan losses 8,356 754 (2,939) 6,171 Other income 92,392 170 4,631 97,193 Other expense 237,433 3,478 23,077 263,988 Income (loss) before income taxes 139,733 951 (15,913) 124,771 Income tax expense (benefit) 26,133 189 (4,251) 22,071 Net income (loss) $ 113,600 $ 762 $ (11,662) $ 102,700 Balances at December 31, 2019 Assets $ 8,521,537 $ 27,593 $ 9,247 $ 8,558,377 Loans 6,481,644 28,143 (8,383) 6,501,404 Deposits 7,125,111 3,919 (76,418) 7,052,612 Operating results for the year ended December 31, 2018 (In thousands) PNB GFSC All Other Total Net interest income $ 258,547 $ 5,048 $ 3,303 $ 266,898 Provision for (recovery of) loan losses 7,569 1,328 (952) 7,945 Other income 88,981 187 11,933 101,101 Other expense 206,843 3,245 18,667 228,755 Income (loss) before income taxes 133,116 662 (2,479) 131,299 Income tax expense (benefit) 23,644 141 (2,873) 20,912 Net income $ 109,472 $ 521 $ 394 $ 110,387 Balances at December 31, 2018 Assets $ 7,753,848 $ 31,388 $ 19,072 $ 7,804,308 Loans 5,671,173 32,664 (11,705) 5,692,132 Deposits 6,334,796 4,142 (78,078) 6,260,860 The operating results in the "All Other" column are used to reconcile the segment totals to the Consolidated Statements of Income. The reconciling amounts for consolidated total assets, loans and deposits consist of the elimination of intersegment borrowings, intersegment loans, intersegment deposits, and the assets of the Parent Company and SEPH which were not eliminated. The following is a reconciliation of financial information for the reportable segments to the Corporation’s consolidated totals: 2020 (In thousands) Net Interest Income Depreciation Expense Other Expense Income Taxes Assets Deposits Totals for reportable segments $ 330,160 $ 10,814 $ 260,526 $ 27,428 $ 9,249,346 $ 7,823,256 Elimination of intersegment items 1,250 — — — (1,458) (250,898) All other totals - not eliminated (3,780) — 15,255 (706) 31,133 — Totals $ 327,630 $ 10,814 $ 275,781 $ 26,722 $ 9,279,021 $ 7,572,358 2019 (In thousands) Net Interest Income Depreciation Expense Other Expense Income Taxes Assets Deposits Totals for reportable segments $ 298,143 $ 9,112 $ 231,799 $ 26,322 $ 8,549,130 $ 7,129,030 Elimination of intersegment items 1,250 — — — (19,231) (76,418) All other totals - not eliminated (1,656) — 23,077 (4,251) 28,478 — Totals $ 297,737 $ 9,112 $ 254,876 $ 22,071 $ 8,558,377 $ 7,052,612 2018 (In thousands) Net Interest Income Depreciation Expense Other Expense Income Taxes Assets Deposits Totals for reportable segments $ 263,595 $ 8,585 $ 201,503 $ 23,785 $ 7,785,236 $ 6,338,938 Elimination of intersegment items 1,275 — — — (13,482) (78,078) All other totals - not eliminated 2,028 — 18,667 (2,873) 32,554 — Totals $ 266,898 $ 8,585 $ 220,170 $ 20,912 $ 7,804,308 $ 6,260,860

Parent Company Statements

Parent Company Statements	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Parent Company Statements	Parent Company Statements The Parent Company statements should be read in conjunction with the consolidated financial statements and the information set forth below. Investments in subsidiaries are accounted for using the equity method of accounting. Cash represents non-interest bearing deposits with PNB. Net cash provided by operating activities reflects cash payments (received from subsidiaries) for income taxes of $6.8 million, $4.1 million and $3.9 million in 2020, 2019 and 2018, respectively. Condensed Balance Sheets December 31, 2020 and 2019 (In thousands) 2020 2019 Assets: Cash $ 248,814 $ 73,663 Investment in subsidiaries 969,054 912,162 Debentures receivable from PNB 25,000 25,000 Other receivables from subsidiaries 1,823 9,168 Other investments 5,375 5,001 Other assets 23,333 20,620 Total assets $ 1,273,399 $ 1,045,614 Liabilities: Long-term debt $ 32,500 $ 42,500 Subordinated notes 187,774 15,000 Other payables to subsidiaries 132 10,092 Other liabilities 12,737 9,008 Total liabilities $ 233,143 $ 76,600 Total shareholders’ equity $ 1,040,256 $ 969,014 Total liabilities and shareholders’ equity $ 1,273,399 $ 1,045,614 Condensed Statements of Income for the years ended December 31, 2020, 2019 and 2018 (In thousands) 2020 2019 2018 Income: Dividends from subsidiaries $ 97,000 $ 97,500 $ 100,000 Interest and dividends 1,250 1,250 1,275 Other 98 4,634 6,068 Total income 98,348 103,384 107,343 Expense: Interest expense 4,311 1,950 617 Other, net 12,234 19,804 14,619 Total expense 16,545 21,754 15,236 Income before income taxes and equity in undistributed income of subsidiaries $ 81,803 $ 81,630 $ 92,107 Income tax benefit 4,390 4,242 4,010 Income before equity in undistributed income of subsidiaries 86,193 85,872 96,117 Equity in undistributed income of subsidiaries 41,730 16,828 14,270 Net income $ 127,923 $ 102,700 $ 110,387 Other comprehensive income (loss) (1) 15,160 40,199 (18,533) Comprehensive income $ 143,083 $ 142,899 $ 91,854 (1) See Consolidated Statements of Comprehensive Income for other comprehensive income (loss) detail. Statements of Cash Flows for the years ended December 31, 2020, 2019 and 2018 (In thousands) 2020 2019 2018 Operating activities: Net income $ 127,923 $ 102,700 $ 110,387 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed income of subsidiaries (41,730) (16,828) (14,270) Compensation expense for issuance of treasury shares to directors 1,274 1,325 1,109 Share-based compensation expense 5,998 4,999 3,954 Gain (loss) on equity securities, net 245 (4,204) (3,267) Decrease (increase) in other assets 6,632 (8,544) (2,073) (Decrease) increase in other liabilities (6,325) 10,006 (163) Net cash provided by operating activities 94,017 89,454 95,677 Investing activities: Outlays for business acquisitions — (28,630) (30,684) Other, net (2,621) 5,723 60 Net cash used in investing activities (2,621) (22,907) (30,624) Financing activities: Cash dividends paid (70,353) (69,113) (63,013) Proceeds from issuance of long-term debt 172,620 50,000 — Repayment of long-term debt (10,000) (7,500) — Repurchase of treasury shares (7,507) (40,535) (5,784) Cash payment for fractional shares (3) (3) (4) Value of common shares withheld to pay employee income taxes (1,002) (827) (610) Net cash provided by (used) in financing activities 83,755 (67,978) (69,411) Increase (decrease) in cash 175,151 (1,431) (4,358) Cash at beginning of year 73,663 75,094 79,452 Cash at end of year $ 248,814 $ 73,663 $ 75,094

Revenue from Contract with Cust

Revenue from Contract with Customer	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers All of Park's revenue from contracts with customers within the scope of ASC 606 is recognized within "Other income" in the Consolidated Statements of Income. The following table presents the Corporation's sources of other income by revenue stream and operating segment for the years ended December 31, 2020, December 31, 2019 and December 31, 2018. Year ended December 31, 2020 Revenue by Operating Segment (in thousands) PNB GFSC All Other Total Income from fiduciary activities Personal trust and agency accounts $ 8,761 $ — $ — $ 8,761 Employee benefit and retirement-related accounts 7,921 — — 7,921 Investment management and investment advisory agency accounts 10,652 — — 10,652 Other 1,539 — — 1,539 Service charges on deposit accounts Non-sufficient funds (NSF) fees 4,999 — — 4,999 Demand deposit account (DDA) charges 2,920 — — 2,920 Other 526 — — 526 Other service income (1) Credit card 2,108 4 — 2,112 HELOC 424 — — 424 Installment 165 — — 165 Real estate 32,827 — 62 32,889 Commercial 1,493 — 528 2,021 Debit card fee income 22,160 — — 22,160 Bank owned life insurance income (2) 4,521 — 268 4,789 ATM fees 1,773 — — 1,773 Gain on the sale of OREO, net 836 — 371 1,207 Net gain on the sale of investment securities (2) 3,286 — — 3,286 Gain (loss) on equity securities, net (2) 2,429 — (247) 2,182 Other components of net periodic pension benefit income (2) 7,759 94 99 7,952 Miscellaneous (3) 7,132 157 97 7,386 Total other income $ 124,231 $ 255 $ 1,178 $ 125,664 (1) Of the $37.6 million of revenue included within "Other service income", approximately $5.2 million is within the scope of ASC 606, with the remaining $32.4 million consisting primarily of residential real estate loan fees which are out of scope. (2) Not within the scope of ASC 606. (3) "Miscellaneous" income includes brokerage income, safe deposit box rentals, and miscellaneous bank fees totaling $7.4 million, all of which are within the scope of ASC 606 . Year ended December 31, 2019 Revenue by Operating Segment (in thousands) PNB GFSC All Other Total Income from fiduciary activities Personal trust and agency accounts $ 9,001 $ — $ — $ 9,001 Employee benefit and retirement-related accounts 7,178 — — 7,178 Investment management and investment advisory agency accounts 10,024 — — 10,024 Other 1,565 — — 1,565 Service charges on deposit accounts Non-sufficient funds (NSF) fees 7,073 — — 7,073 Demand deposit account (DDA) charges 3,105 — — 3,105 Other 657 — — 657 Other service income (1) Credit card 2,354 7 — 2,361 HELOC 403 — 4 407 Installment 256 — (83) 173 Real estate 11,167 — (9) 11,158 Commercial 1,259 — 142 1,401 Debit card fee income 20,250 — — 20,250 Bank owned life insurance income (2) 4,168 — 389 4,557 ATM fees 1,828 — — 1,828 Loss on the sale of OREO, net (110) — (112) (222) Net loss on sale of investment securities (2) (421) — — (421) Gain on equity securities, net (2) 913 — 4,205 5,118 Other components of net periodic pension benefit income (2) 4,587 54 91 4,732 Miscellaneous (3) 7,135 109 4 7,248 Total other income $ 92,392 $ 170 $ 4,631 $ 97,193 (1) Of the $15.5 million of revenue included within "Other service income", approximately $4.9 million is within the scope of ASC 606, with the remaining $10.6 million consisting primarily of residential real estate loan fees which are out of scope. (2) Not within the scope of ASC 606. (3) "Miscellaneous" income includes brokerage income, safe deposit box rentals, and miscellaneous bank fees totaling $7.2 million, all of which are within the scope of ASC 606. Year ended December 31, 2018 Revenue by Operating Segment (in thousands) PNB GFSC All Other Total Income from fiduciary activities Personal trust and agency accounts $ 8,495 $ — $ — $ 8,495 Employee benefit and retirement-related accounts 6,863 — — 6,863 Investment management and investment advisory agency accounts 9,352 — — 9,352 Other 1,583 — — 1,583 Service charges on deposit accounts Non-sufficient funds (NSF) fees 7,483 — — 7,483 Demand deposit account (DDA) charges 3,310 — — 3,310 Other 668 — — 668 Other service income (1) Credit card 2,212 27 — 2,239 HELOC 471 — — 471 Installment 243 — — 243 Real estate 9,079 — — 9,079 Commercial 1,153 — 1,081 2,234 Debit card fee income 17,317 — — 17,317 Bank owned life insurance income (2) 4,903 — 1,912 6,815 ATM fees 1,978 — — 1,978 Gain on the sale of OREO, net 1,440 — 2,795 4,235 Net gain on sale of investment securities (2) (2,271) — — (2,271) Gain on equity securities, net (2) 549 — 4,067 4,616 Other components of net periodic pension benefit income (2) 6,609 75 136 6,820 Gain on sale of non-performing loans 660 — 2,166 2,826 Miscellaneous (3) 6,884 85 (224) 6,745 Total other income $ 88,981 $ 187 $ 11,933 $ 101,101 (1) Of the $14.3 million of revenue included within "Other service income", approximately $5.5 million is within the scope of ASC 606, with the remaining $8.8 million consisting primarily of residential real estate loan fees which are out of scope. (2) Not within the scope of ASC 606. (3) "Miscellaneous" income includes brokerage income, safe deposit box rentals, and miscellaneous bank fees totaling $6.7 million, all of which are within the scope of ASC 606. A description of Park's material revenue streams accounted for under ASC 606 follows: Income from fiduciary activities (gross) : Park earns fiduciary fee income and investment brokerage fees from its contracts with trust customers for various fiduciary and investment-related services. These fees are earned over time as the Company provides the contracted monthly and quarterly services and are generally assessed based on the market value of the trust assets. Service charges on deposit accounts and ATM fees : The Corporation earns fees from its deposit customers for transaction-based, account maintenance, and overdraft services. Transaction-based fees, which include services such as ATM use fees, stop payment charges, statement rendering, and ACH fees, are recognized at the time the transaction is executed as that is the point in time the Corporation fulfills the customer's request. Account maintenance fees, which relate primarily to monthly maintenance, are generally recognized at the end of the month, representing the period over which the Corporation satisfies the performance obligation. Overdraft fees are recognized at the point in time that the overdraft occurs. Service charges on deposits are withdrawn from the customer's account balance. Other service income : Other service income includes income from (1) the sale and servicing of loans sold to the secondary market, (2) incentive income from third-party credit card issuers, and (3) loan customers for various loan-related activities and services. Income related to the sale and servicing of loans sold to the secondary market is included within Other service income, but is not within the scope of ASC 606. Services that fall within the scope of ASC 606 are recognized as revenue when the Company satisfies its performance obligation to the customer. Debit card fee income : Park earns interchange fees from debit cardholder transactions conducted primarily through the Visa payment network. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, net of card network fees, concurrently with the transaction processing services provided to the cardholder.

Quarterly Financial Data (unaud

Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarterly Financial Data (Unaudited) The following table is a summary of selected quarterly results of operations for the years ended December 31, 2020 and 2019. Three Months Ended (Dollars in thousands, except share data) March 31 June 30 Sept. 30 Dec. 31 2020: Interest income $ 88,909 $ 87,445 $ 89,566 $ 91,800 Interest expense 12,626 6,259 5,726 5,479 Net interest income 76,283 81,186 83,840 86,321 Provision for (recovery of) loan losses 5,153 12,224 13,836 (19,159) Income before income taxes 27,340 35,127 36,703 55,475 Net income 22,372 29,505 30,846 45,200 Per common share data: Net income per common share - basic 1.37 1.81 1.89 2.77 Net income per common share - diluted 1.36 1.80 1.88 2.75 Weighted-average common shares outstanding - basic 16,303,602 16,296,427 16,300,720 16,310,551 Weighted-average common shares equivalent - diluted 16,425,881 16,375,434 16,393,792 16,434,812 2019: Interest income $ 81,856 $ 92,226 $ 94,589 $ 91,829 Interest expense 14,080 16,375 17,488 14,820 Net interest income 67,776 75,851 77,101 77,009 Provision for (recovery of) loan losses 2,498 1,919 1,967 (213) Income before income taxes 30,476 26,548 37,532 30,215 Net income 25,455 22,163 31,146 23,936 Per common share data: Net income per common share - basic 1.63 1.34 1.90 1.46 Net income per common share - diluted 1.62 1.33 1.89 1.45 Weighted-average common shares outstanding - basic 15,651,541 16,560,545 16,382,798 16,342,485 Weighted-average common shares equivalent - diluted 15,744,777 16,642,571 16,475,741 16,454,553 The sum of the quarterly earnings per share data presented in the table may not equal the annual results due to rounding and the impact of dilutive common shares on the annual versus the quarterly earnings per share calculation.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of Park National Corporation and its subsidiaries (“Park”, the “Company” or the “Corporation”), unless the context otherwise requires. Material intercompany accounts and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP") requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Reclassifications	ReclassificationsCertain prior year amounts have been reclassified to conform with the current presentation. These reclassifications had no impact on net income or shareholders' equity.
Restrictions on Cash and Due from Banks	Restrictions on Cash and Due from Banks The Corporation’s national bank subsidiary, The Park National Bank ("PNB"), previously was required to maintain average reserve balances with the Federal Reserve Bank of Cleveland. The Federal Reserve Board announced on March 15, 2020 that the Board reduced reserve requirement ratios to zero percent effective March 26, 2020. This action eliminated reserve requirements for all depository institutions. The average required reserve balance was approximately $89.2 million at December 31, 2019. No other compensating balance arrangements were in existence at December 31, 2020.
Investment Securities	Investment Securities Debt securities are classified upon acquisition into one of three categories: HTM, AFS, or trading (see Note 5 - Investment Securities). HTM securities are those debt securities that the Corporation has the positive intent and ability to hold to maturity and are recorded at amortized cost. AFS securities are those debt securities that would be available to be sold in the future in response to the Corporation’s liquidity needs, changes in market interest rates, and asset-liability management strategies, among other reasons. AFS securities are reported at fair value, with unrealized holding gains and losses excluded from earnings but included in other comprehensive income (loss), net of applicable income taxes. The Corporation did not hold any trading securities during any period presented. Equity securities, included within "Other investment securities" on the Consolidated Balance Sheets, are carried at fair value, with changes in fair value reported in net income. Equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment. Debt securities are evaluated quarterly for potential other-than-temporary impairment. Management considers the facts related to each security including the nature of the security, the amount and duration of the loss, the credit quality of the issuer, the expectations for that security’s performance and whether Park intends to sell, or it is more likely than not that Park will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. Declines in the value of debt securities that are considered to be other-than-temporary are separated into (1) the amount of the total impairment related to credit loss and (2) the amount of the total 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), net of income tax. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. Interest income from investment securities includes amortization of purchase premium or discount. Premiums and discounts on investment securities are amortized on the level-yield method without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Gains and losses realized on the sale of investment securities are recorded on the trade date and determined using the specific identification method.
Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) Stock	Federal Home Loan Bank and Federal Reserve Bank of Cleveland Stock PNB is a member of the FHLB and the FRB. Members are required to own a certain amount of stock based on their level of borrowings and other factors and may invest in additional amounts. FHLB stock and FRB stock are classified as restricted securities and are carried at their redemption value within "Other investment securities" on the Consolidated Balance Sheets. Impairment is evaluated based on the ultimate recovery of par value. Both cash and stock dividends are reported as income.
Bank Owned Life Insurance	Bank Owned Life Insurance Park has purchased insurance policies on the lives of directors and certain key officers. Bank owned life insurance is recorded at its cash surrender value (or the amount that can be realized).
Mortgage Loans Held For Sale	Loans Held for Sale Park has elected the fair value option for mortgage loans held for sale, which are carried at their fair value as of each balance sheet date.
Mortgage Banking Derivatives	Mortgage Banking DerivativesCommitments to fund mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of these mortgage loans are accounted for as free standing derivatives.  The fair value of the interest rate lock is recorded at the time the commitment to fund the mortgage loan is executed and is adjusted for the expected exercise of the commitment before the loan is funded.  In order to hedge the change in interest rates resulting from its commitments to fund the loans, the Company enters into forward commitments for the future delivery of mortgage loans when interest rate locks are entered into.  Fair value of these mortgage derivatives is estimated based on the change in mortgage interest rates from the date the interest on the loan is locked.  The fair value of these derivatives is included in "Loans" in the Consolidated Balance Sheets. Changes in the fair values of these derivatives are included in "Other service income" in the Consolidated Statements of Income.
Loans	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff, are reported at their outstanding principal balances adjusted for any charge-offs, any nonaccrual interest payments applied to principal, any deferred fees or costs on originated loans, and any unamortized premiums or discounts on purchased loans. Interest income is accrued on the unpaid principal balance. Late charges on loans are recognized as income when they are collected. Net loan origination fees and costs are deferred and recognized in interest income using the level-yield method without anticipating prepayments. Commercial loans include: (1) commercial, financial and agricultural loans; (2) commercial real estate loans; (3) those commercial loans in the construction real estate loan segment; (4) those commercial loans in the residential real estate loan segment; and (5) leases. Consumer loans include: (1) mortgage and installment loans included in the construction real estate segment; (2) mortgage, home equity lines of credit ("HELOCs"), and installment loans included in the residential real estate segment; and (3) all loans included in the consumer segment. Generally, commercial loans are placed on nonaccrual status at 90 days past due and consumer and residential mortgage loans are placed on nonaccrual status at 120 days past due. The delinquency status of a loan is based on contractual terms and not on how recently payments have been received. Commercial loans placed on nonaccrual status are considered impaired (see Note 6 - Loans). Park’s charge-off policy for commercial loans requires management to establish a specific reserve or record a charge-off when collection is in doubt or it is probable a loss has been incurred and there is, or likely will be, a collateral shortfall related to the estimated value of the collateral securing the loan. The Company’s charge-off policy for consumer loans is dependent on the class of the loan. Residential mortgage loans, HELOCs, and consumer loans secured by residential real estate are typically charged down to the value of the collateral, less estimated selling costs, at 180 days past due. The charge-off policy for other consumer loans, primarily installment loans, requires a monthly review of delinquent loans and a complete charge-off for any account that reaches 120 days past due. For loans which are on nonaccrual status, it is Park’s policy to reverse interest previously accrued on the loans against interest income. Interest on such loans may be recorded on a cash basis and be included in earnings only when Park expects to receive the entire recorded investment of the loan. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. A description of each segment of the loan portfolio, along with the risk characteristics of each segment, is included below: Commercial, financial and agricultural: Commercial, financial and agricultural ("C&I") loans are made for a wide variety of general corporate purposes, including financing for commercial and industrial properties, financing for equipment, inventory and accounts receivable, acquisition financing, commercial leasing, and to consumer finance companies. The term of each commercial loan varies by its purpose. Repayment terms are structured such that commercial loans will be repaid within the economic useful life of the underlying asset. Risk of loss on C&I loans largely depends upon general economic cycles, as they may adversely impact certain industries, competency of the borrower's management team, the quality of the underlying assets supporting the loans including accounts receivable, inventory, and equipment, and the accuracy of the borrower's financial reporting. Such risks are mitigated by generally requiring the borrower's owners to guaranty the loans. Commercial real estate: Commercial real estate (“CRE”) loans include mortgage loans to developers and owners of commercial real estate. The lending policy for CRE loans is designed to address the unique risk attributes of CRE lending. The collateral for these CRE loans is the underlying commercial real estate. Risk of loss on CRE loans largely depends upon the cash flow of the properties which is influenced by the amount of vacancy experienced by the underlying real estate, the credit capacity of the tenants occupying the underlying real estate, and general economic trends as they may adversely impact the value of the property. These risks are mitigated by generally requiring personal guaranties of the owners of the properties and by requiring appraisals pursuant to government regulations. Construction real estate : The Company defines construction loans as both commercial construction loans and residential construction loans where the loan proceeds are used exclusively for the improvement of real estate as to which the Company holds a mortgage. Construction loans may be in the form of a permanent loan or a short-term construction loan, depending on the needs of the individual borrower. Construction financing is generally considered to involve a higher degree of risk of loss than long-term financing on improved, occupied real estate. Risk of loss on a construction loan depends largely upon the accuracy of the initial estimate of the property’s value at completion of construction and the estimated cost (including interest) of construction. If the estimate of construction cost proves to be inaccurate, Park may be required to advance funds beyond the amount originally committed to permit completion of the project. If the estimate of value proves inaccurate, Park may be confronted, at or prior to the maturity of the loan, with a project having a value insufficient to assure full repayment, should the borrower default. In the event that a default on a construction loan occurs and foreclosure follows, Park must take control of the project and attempt to either arrange for completion of construction or dispose of the unfinished project. Additional risk exists with respect to loans made to developers who do not have a buyer for the property, as the developer may lack funds to pay the loan if the property is not sold upon completion. Park attempts to reduce such risks on loans to developers by generally requiring personal guarantees and reviewing current personal financial statements and tax returns as well as other projects undertaken by the developer. Residential real estate: The Company defines residential real estate loans as first mortgages on individuals’ primary residences or second mortgages of individuals’ primary residences in the form of HELOCs or installment loans. Credit approval for residential real estate loans requires demonstration of sufficient income to repay the principal and interest and the real estate taxes and insurance, stability of employment, an established credit record and a current independent third-party appraisal providing the market value of the real estate securing the loan. Residential real estate loans typically have longer terms and higher balances with lower yields as compared to consumer loans, but generally carry lower risks of default. The Dodd-Frank Wall Street Reform and Consumer Protection Act requires creditors to make a reasonable and good faith determination of a consumer's ability to repay any consumer credit transaction secured by a dwelling. Documentation and verification of income within defined time frames and not-to-exceed limits are bases for affirming ability to repay. Risk of loss largely depends upon factors affecting the borrower's ability to repay as well as the general economic trends as they may adversely impact the value of the property. These risks are mitigated by completing a comprehensive underwriting of the borrower and by requiring appraisals pursuant to government regulations. Consumer: The Company originates direct and indirect consumer loans, primarily automobile loans, to customers in its primary market areas. Credit approval for consumer loans requires income sufficient to repay principal and interest due, stability of employment, an established credit record and sufficient collateral for secured loans. Consumer loans typically have shorter terms and lower balances with higher yields as compared to real estate mortgage loans, but generally carry higher risks of default. Consumer loan collections are dependent on the borrower’s financial stability, and thus are more likely to be affected by adverse personal circumstances.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Credit Risk Park's commercial loan portfolio includes loans to a wide variety of corporations and businesses across many industrial classifications in the 26 Ohio counties, three North Carolina counties, four South Carolina counties and one Kentucky county where PNB operates, with the exception of nationwide aircraft loans and nationwide asset-based lending to consumer finance companies. The primary industries represented by these customers include real estate rental and leasing, finance and insurance, construction, agriculture, forestry, fishing and hunting, manufacturing, retail trade, health care, accommodation and food services and other services.
Certain Loans and Debt Securities Acquired in Transfer, Recognizing Interest Income on Impaired Loans, Policy [Policy Text Block]	Purchased Credit Impaired Loans The Company has purchased loans, some of which have shown evidence of credit deterioration since origination. These PCI loans are recorded at fair value at inception, such that there is no carryover of the sellers' allowance for loan losses. After acquisition, losses are recognized by an increase in the allowance for loan losses. PCI loans are accounted for individually or aggregated into pools of loans based on common characteristics. The Company estimates the amount and timing of expected cash flows for each loan or pool and the expected cash flows in excess of the amount paid is recorded as interest income over the remaining life of the loan (accretable yield). The excess of the loan’s or pool's contractual principal and interest over expected cash flows is not recorded (nonaccretable difference).
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is that amount believed adequate to absorb probable incurred credit losses in the loan portfolio based on management’s evaluation of various factors. The determination of the allowance requires significant estimates, including the timing and amounts of expected cash flows on impaired loans, consideration of current economic conditions, and historical loss experience pertaining to pools of homogeneous loans, all of which may be susceptible to change. The allowance is increased through a provision for loan losses that is charged to earnings based on management’s quarterly evaluation of the factors previously mentioned and is reduced by charge-offs, net of recoveries. The allowance for loan losses includes both (1) an estimate of loss based on historical loss experience within both commercial and consumer loan categories with similar characteristics (“statistical allocation”) and (2) an estimate of loss based on an impairment analysis of each commercial loan that is considered to be impaired (“specific allocation”). Included in the statistical allocation is a reserve for TDRs within the consumer loan portfolio. Management performs a periodic evaluation to ensure the reserve calculated utilizing the statistical allocation is consistent with a reserve calculated under Accounting Standards Codification ("ASC") 310-10 - Receivables . In calculating the allowance for loan losses, management believes it is appropriate to consider historical loss rates that are comparable to the current period being analyzed, giving consideration to losses experienced over a full cycle. As such, a year is added to the look back period each time historical losses are updated, until the economic cycle is complete, as defined by a period of rising charge-offs, considering both internal and industry trends. In updating the historical loss rates to incorporate 2020 losses, management considered if the economic deterioration as a result of the COVID-19 pandemic represented the end of a cycle for the purposes of the allowance for loan loss calculation, but, due to the historically low level of charge-offs, determined 2020 should be included in the cycle beginning in 2010. For the historical loss factor at December 31, 2020, the Company utilized an annual loss rate (“historical loss experience”), calculated based on an average of the net charge-offs and the annual change in specific reserves for impaired commercial loans, experienced during 2010 through 2020 within the individual segments of the commercial and consumer loan categories. U.S. GAAP requires a specific allocation to be established as a component of the allowance for loan losses for certain loans when it is probable that all amounts due pursuant to the contractual terms of the loans will not be collected, and the recorded investment in the loans exceeds their measure of impairment. Management considers the following related to commercial loans when determining if a loan should be considered impaired : (1) current debt service coverage levels of the borrowing entity; (2) payment history over the most recent 12-month period; (3) other signs of deterioration in the borrower’s financial situation, such as changes in credit scores; and (4) global cash flows of financially sound guarantors that have previously supported loan payments. The recorded investment is the balance of the loan, plus accrued interest receivable. Impairment is measured using either the present value of expected future cash flows based upon the initial effective interest rate on the loan, or the fair value of the collateral. If a loan is considered to be collateral dependent, the fair value of collateral, less estimated selling costs, is used to measure impairment. Loans acquired as part of the acquisition of NewDominion Bank were recorded at fair value on the date of acquisition, July 1, 2018. Loans acquired as part of the acquisition of Carolina Alliance Bank were recorded at fair value on the date of acquisition, April 1, 2019. An allowance is only established on acquired NewDominion Bank loans and Carolina Alliance Bank loans as a result of credit deterioration post acquisition. As of December 31, 2020, there was a $678,000 allowance related to performing acquired NewDominion Bank loans and Carolina Alliance Bank loans.
Troubled Debt Restructuring (TDRs)	Troubled Debt Restructurings ("TDRs") Management classifies loans as TDRs when a borrower is experiencing financial difficulty and Park has granted a concession. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of the borrower's debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. Management’s policy is to modify loans by extending the term or by granting a temporary or permanent contractual interest rate below the market rate, not by forgiving debt. A court's discharge of a borrower's debt in a Chapter 7 bankruptcy is considered a concession when the borrower does not reaffirm the discharged debt. Additionally, Park is working with borrowers impacted by the COVID-19 pandemic and providing modifications to include either interest only deferral or principal and interest deferral, in each case, for initial periods up to 90 days. As necessary, Park is making available a second 90-day interest only deferral or principal and interest deferral bringing the total potential deferral period to six months. A majority of these modifications are excluded from TDR classification under Section 4013 of the CARES Act or under applicable interagency guidance of the federal banking regulators. In accordance with this guidance, such modified loans will be considered current and will continue to accrue interest during the deferral period. TDRs are measured at the present value of estimated future cash flows using the loan’s effective rate at inception, or if a TDR is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. Commercial TDRs are separately identified for impairment disclosures.
Premises and Equipment	Premises and Equipment Land is carried at cost and is not subject to depreciation. Premises and equipment are carried at cost, less accumulated depreciation and amortization. Depreciation is generally provided on the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the remaining lease period or the estimated useful lives of the improvements. Upon the sale or other disposal of an asset, the cost and related accumulated depreciation are removed from the accounts and the resulting gain or loss is recognized. Maintenance and repairs are charged to expense as incurred while renewals and improvements that extend the useful life of an asset are capitalized. Premises and equipment are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of a particular asset may not be recoverable. The range of depreciable lives over which premises and equipment are being depreciated are: Buildings 30 Years Building improvements 5 to 10 Years Equipment, furniture and fixtures 3 to 12 Years Leasehold improvements Shorter of the remaining lease period or the estimated useful life of the improvement
Other Real Estate Owned (OREO)	Other Real Estate Owned Management transfers a loan to OREO at the time that Park takes deed/title to the asset. OREO is initially recorded at fair value less anticipated selling costs (net realizable value), establishing a new cost basis, and consists of property acquired through foreclosure and real estate held for sale. If the net realizable value is below the carrying value of the loan at the date of transfer, the difference is charged to the allowance for loan losses. These assets are subsequently accounted for at the lower of cost or fair value less costs to sell. Subsequent changes in the value of real estate are classified as OREO valuation adjustments, are reported as adjustments to the carrying amount of OREO and are recorded within “Other income”. In certain circumstances
Finance, Loan and Lease Receivables, Held for Investments, Foreclosed Assets Policy [Policy Text Block]	Foreclosed Assets Foreclosed assets include non-real estate assets where Park, as creditor, has received physical possession of a borrower’s assets, regardless of whether formal foreclosure proceedings take place. Additionally, TDRs in which Park obtains one of more of the debtor’s non-real estate assets in place of all or part of the receivable are accounted for as foreclosed assets. Foreclosed assets are initially recorded as fair value less costs to sell when acquired, establishing a new cost basis. Operating costs after acquisition are expensed as incurred. As of December 31, 2020 and 2019, Park had $3.6 million and $4.2 million, respectively, of foreclosed assets included within “Other assets.”
Mortgage Loan Servicing Rights	Mortgage Servicing Rights When Park sells mortgage loans with servicing retained, MSRs are recorded at fair value with the income statement effect recorded in "Other service income." Capitalized MSRs are amortized in proportion to and over the period of the estimated future servicing income of the underlying loan and are included within “Other service income”. MSRs are assessed for impairment quarterly, based on fair value, with any impairment recognized through a valuation allowance. The fair value of MSRs is determined by discounting estimated future cash flows from the servicing assets, using market discount rates and expected future prepayment rates. In order to calculate fair value, the sold loan portfolio is stratified into homogeneous pools of like categories. (See Note 26 - Loan Servicing.)
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over net identifiable tangible and intangible assets acquired in a purchase business combination. Goodwill is not amortized to expense, but is subject to impairment tests annually, or more frequently, if events or changes in circumstances indicate that the asset might be impaired, by assessing qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing these events or circumstances, it is concluded that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then the performance of additional analysis is unnecessary. If the carrying amount of the goodwill exceeds the fair value, an impairment charge must be recorded in an amount equal to the excess, not to exceed the total goodwill allocated to the reporting unit. Park evaluates goodwill for impairment on April 1 of each year, with financial data as of March 31. Based on the qualitative analysis performed as of April 1, 2020, the Company determined that goodwill for PNB was not impaired. During each of the second, third and fourth quarters of 2020, management determined that the deterioration in general economic conditions as a result of the COVID-19 pandemic and responses thereto represented a triggering event prompting an evaluation of goodwill for impairment. Based on the qualitative analysis performed during each of the second, third and fourth quarters of 2020, the Company determined that goodwill was not impaired. Management continues to monitor economic factors to evaluate goodwill impairment. (See Note 8 - Goodwill and Other Intangible Assets and Note 30 - Segment Information for operating segment results.) Other intangible assets consist of core deposit intangibles and a trade name intangible. Core deposit intangibles are amortized on an accelerated basis over a period of ten years. The trade name intangible when initially recorded, assumed an indefinite useful life. During 2019, the trade name intangible was deemed impaired, and a $1.3 million charge was recorded in "other expense". (See Note 8 - Goodwill and Other Intangible Assets.)
Consolidated Statement of Cash Flows	Consolidated Statements of Cash Flows Cash and cash equivalents include cash and cash items, amounts due from banks and money market instruments. Generally, money market instruments are purchased and sold for one-day periods.
Loss Contingencies and Guarantees	Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there now are such matters that will have a material effect on the financial statements.
Income Tax, Policy [Policy Text Block]	Income Taxes The Corporation accounts for income taxes using the asset and liability approach. Under this method, deferred tax assets and deferred tax liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. To the extent that Park does not consider it more likely than not that a deferred tax asset will be recovered, a valuation allowance is recorded. All positive and negative evidence is reviewed when determining how much of a valuation allowance is recognized on a quarterly basis. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. An uncertain tax position is recognized as a benefit only if it is “more-likely-than-not” that the tax position would be sustained in a tax examination being presumed to occur. The benefit recognized for a tax position that meets the “more-likely-than-not” criteria is measured based on the largest benefit that is more than 50 percent likely to be realized, taking into consideration the amounts and probabilities of the outcome upon settlement. For tax positions not meeting the “more-likely-than-not” test, no tax benefit is recorded. Park recognizes any interest and penalties related to income tax matters in income tax expense.
Treasury Shares	Treasury Shares The purchase of Park’s common shares to be held in treasury is recorded at cost. At the date of retirement or subsequent reissuance, the treasury shares account is reduced by the weighted average cost of the common shares retired or reissued.
Policyholders' Dividend [Policy Text Block]	Dividend Restriction Banking regulations require maintaining certain capital levels and may limit the dividends paid by a bank to its parent holding company or by the parent holding company to its shareholders. (See Note 24 - Dividend Restrictions and Note 29 - Capital Ratios.)
Comprehensive Income	Comprehensive Income Comprehensive income consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized gains and losses on debt securities available for sale, changes in the funded status of the Company’s defined benefit pension plan and unrealized gains and losses on cash flow hedges which are also recognized as separate components of equity.
Stock Based Compensation	Share-Based Compensation Compensation cost is recognized for restricted stock units and stock awards issued to employees and directors, respectively, based on the fair value of these awards at the date of grant. The market price of Park’s common shares at the date of grant is used to estimate the fair value of restricted stock units and stock awards. Compensation cost is recognized on a straight-line basis over the required service period, generally defined as the vesting period and is recorded in "Salaries" expense. (See Note 19 - Share-Based Compensation.) The Company's accounting policy is to recognize forfeitures as they occur.
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial InstrumentsFinancial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded.
Fair Value Measurement	Fair Value Measurement Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in Note 28 - Fair Value. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates.
Derivatives, Policy	Derivatives At the inception of a derivative contract, Park designates the derivative as one of three types based on its intentions and belief as to the likely effectiveness as a hedge. These three types are (1) a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (“fair value hedge”), (2) a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) an instrument with no hedging designation (“stand-alone derivative”). Park does not have any fair value hedges. For a cash flow hedge, the gain or loss on the derivative is reported in other comprehensive income and is reclassified into earnings in the same periods during which the hedged transaction affects earnings. Changes in the fair value of derivatives that do not qualify for hedge accounting are reported currently in earnings, as non-interest income. Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in non- interest income. Cash flows on hedges are classified in the Consolidated Statements of Cash Flow under the same item as the cash flows of the items being hedged. Park formally documents the relationship between derivatives and hedged items, as well as the risk-management objective and the strategy for undertaking hedge transactions at the inception of the hedging relationship. The documentation includes linking cash flow hedges to specific assets and liabilities on the Consolidated Balance Sheets. Park also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in cash flows of the hedged items. Park discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting cash flows of the hedged item, the derivative is settled or terminates, or treatment of the derivative as a hedge is no longer appropriate or intended. When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as non-interest income. When a cash flow hedge is discontinued but the hedged cash flows are still expected to occur, gains or losses that were accumulated in other comprehensive income are amortized into earnings over the same periods that the hedged transactions will affect earnings. The Company is exposed to losses if a counterparty fails to make its payments under a contract in which the Company is in the net receiving position. The Company anticipates that the counterparties will be able to fully satisfy their obligations under the agreements. All the contracts to which the Company is party settle monthly or quarterly.
Transfers and Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Retirement Plans	Retirement Plans Pension expense is the net of service and interest cost, return on plan assets and amortization of gains and losses not immediately recognized. The service cost component of pension expense is recorded within "Employee benefits" on the Consolidated Statements of Income. All other components of pension expense are recorded within "Other components of net periodic benefit income" on the Consolidated Statements of Income. Employee KSOP plan expense is the amount of matching contributions to Park's Employees Stock Ownership Plan. Deferred compensation and supplemental retirement plan expense allocates the benefits over years of service. (See Note 20 - Benefit Plans.)
Earnings Per Common Share	Earnings Per Common Share Basic earnings per common share is net income divided by the weighted average number of common shares outstanding during the period. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under restricted stock unit awards. Earnings and dividends per common share are restated for any stock splits and stock dividends through the date of issuance of the consolidated financial statements. (See Note 19 - Share-Based Compensation and Note 23 - Earnings Per Common Share.)
Segment Reporting, Policy [Policy Text Block]	Operating Segments The Corporation is a financial holding company headquartered in Newark, Ohio. The operating segments for the Corporation are its chartered national bank subsidiary, PNB (headquartered in Newark, Ohio) and GFSC.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of depreciable lives of premises and equipment	The range of depreciable lives over which premises and equipment are being depreciated are: Buildings 30 Years Building improvements 5 to 10 Years Equipment, furniture and fixtures 3 to 12 Years Leasehold improvements Shorter of the remaining lease period or the estimated useful life of the improvement

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The following table summarizes the consideration paid for Carolina Alliance and the amounts of the assets acquired and liabilities assumed at their fair value: (in thousands) Consideration Cash $ 28,630 Park common shares 98,275 Fair value of total consideration transferred $ 126,905 Recognized amounts of identifiable assets acquired and liabilities assumed Cash and cash equivalents $ 23,799 Securities 97,606 Loans 578,577 Premises and equipment 8,337 Core deposit intangibles 8,207 Other assets 32,123 Total assets acquired $ 748,649 Deposits $ 632,649 Other liabilities 35,951 Total liabilities assumed 668,600 Net identifiable assets 80,049 Goodwill $ 46,856 The table below presents information with respect to the fair value of acquired loans as well as their book balance at the acquisition date. (in thousands) Book Balance Fair Value Commercial, financial and agricultural $ 80,895 $ 80,580 Commercial real estate 281,425 273,855 Construction real estate: Commercial 43,106 42,176 Mortgage 11,130 10,633 Residential real estate: Commercial 48,546 48,684 Mortgage 30,519 30,969 HELOC 40,825 39,853 Consumer 4,813 4,647 Leases 28,589 28,781 Purchased credit impaired 19,850 18,399 Total loans $ 589,698 $ 578,577
Business Acquisition, Pro Forma Information [Table Text Block]	The following table presents supplemental pro forma information as if the Carolina Alliance acquisitions had occurred as of January 1, 2018. The unaudited pro forma information includes adjustments for interest income on loans and securities acquired, amortization of intangibles arising from the respective transactions, depreciation expense on property acquired, interest expense on deposits acquired, and the related tax effects. The pro forma information is not necessarily indicative of the results of operations that would have occurred had the transactions been effected on the assumed date. Twelve months ended December 31, (dollars in thousands, except per share data) 2019 2018 Net interest income $ 304,540 $ 295,656 Net income 111,463 118,679 Basic earnings per share 6.76 7.18 Diluted earnings per share 6.72 7.12

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Schedule of marketable securities	Debt Securities Investment securities at December 31, 2020 and December 31, 2019 were as follows: (In thousands) Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value 2020: Debt Securities Available-for-Sale Obligations of states and political subdivisions $ 279,245 $ 25,973 $ — $ 305,218 U.S. Government sponsored entities’ asset-backed securities 726,589 26,248 728 752,109 Corporate debt securities 2,000 14 — 2,014 Total $ 1,007,834 $ 52,235 $ 728 $ 1,059,341 (In thousands) Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value 2019: Debt Securities Available-for-Sale Obligations of states and political subdivisions $ 302,928 $ 17,563 $ — $ 320,491 U.S. Government sponsored entities’ asset-backed securities 884,571 10,862 6,223 889,210 Total $ 1,187,499 $ 28,425 $ 6,223 $ 1,209,701
Schedule of unrealized loss on investments	The following table provides detail on investment securities with unrealized losses aggregated by investment category and length of time the individual securities had been in a continuous loss position at December 31, 2020 and December 31, 2019: Less than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses 2020: Debt Securities Available-for-Sale U.S. Government sponsored entities' asset-backed securities $ 86,393 $ 695 $ 4,727 $ 33 $ 91,120 $ 728 Total $ 86,393 $ 695 $ 4,727 $ 33 $ 91,120 $ 728 Less than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses 2019: Debt Securities Available-for-Sale U.S. Government sponsored entities' asset-backed securities $ 237,613 $ 1,106 $ 171,805 $ 5,117 $ 409,418 $ 6,223 Total $ 237,613 $ 1,106 $ 171,805 $ 5,117 $ 409,418 $ 6,223
Schedule of contractual maturity of debt securities	The amortized cost and estimated fair value of investments in debt securities at December 31, 2020, are shown in the following table by contractual maturity, except for asset-backed securities, which are shown as a single total, due to the unpredictability of the timing in principal repayments. (In thousands) Amortized Cost Fair Value Tax Equivalent Yield (1) Debt Securities Available-for-Sale Corporate debt securities Due five through ten years $ 2,000 $ 2,014 4.00 % Obligations of states and political subdivisions Due five through ten years $ 66,449 $ 72,860 3.80 % Due greater than ten years 212,796 232,358 3.67 % Total $ 279,245 $ 305,218 3.70 % U.S. Government sponsored entities’ asset-backed securities $ 726,589 $ 752,109 2.14 % (1) The tax equivalent yield for obligations of states and political subdivisions includes the effects of a taxable equivalent adjustment using a 21% federal corporate income tax rate.
Cost and Equity Method Investments Disclosure [Text Block]	The carrying amount of other investment securities at December 31, 2020 and 2019 was as follows: (In thousands) December 31, 2020 December 31, 2019 FHLB stock $ 22,090 $ 30,060 FRB stock 14,653 14,653 Equity investments carried at fair value 2,511 1,993 Equity investments carried at modified cost (1) 4,689 2,689 Equity investments carried at net asset value 21,522 20,411 Total other investment securities $ 65,465 $ 69,806 (1) There have been no impairments, downward adjustments, or upward adjustments made to equity investments carried at modified cost.

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Schedule of composition of loan portfolio by class of loan	The composition of the loan portfolio, by class of loan, as of December 31, 2020 and December 31, 2019 was as follows: 12/31/2020 12/31/2019 (In thousands) Loan Balance Accrued Interest Receivable Recorded Investment Loan Balance Accrued Interest Receivable Recorded Investment Commercial, financial and agricultural * $ 1,588,989 $ 6,528 $ 1,595,517 $ 1,185,110 $ 4,393 $ 1,189,503 Commercial real estate * 1,748,189 6,017 1,754,206 1,609,413 5,571 1,614,984 Construction real estate: Commercial 226,991 572 227,563 233,637 826 234,463 Mortgage 115,492 232 115,724 96,574 228 96,802 Installment 938 3 941 1,488 4 1,492 Residential real estate: Commercial 526,222 1,161 527,383 479,081 1,339 480,420 Mortgage 1,096,358 947 1,097,305 1,176,316 1,381 1,177,697 HELOC 182,028 647 182,675 224,766 1,113 225,879 Installment 8,436 22 8,458 12,563 32 12,595 Consumer 1,659,704 4,510 1,664,214 1,452,375 4,314 1,456,689 Leases 24,438 14 24,452 30,081 20 30,101 Total loans $ 7,177,785 $ 20,653 $ 7,198,438 $ 6,501,404 $ 19,221 $ 6,520,625 * Included within commercial, financial and agricultural loans and commercial real estate loans was an immaterial amount of consumer loans that were not broken out by class.
Schedule of recorded investment in nonaccrual restructured and loans past due 90 days or more and accruing	The following table presents the recorded investment in nonaccrual loans, accruing TDRs, and loans past due 90 days or more and still accruing by class of loan as of December 31, 2020 and December 31, 2019: 12/31/2020 (In thousands) Nonaccrual Loans Accruing TDRs Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 23,261 $ 5,619 $ — $ 28,880 Commercial real estate 67,426 2,931 377 70,734 Construction real estate: Commercial 3,110 — — 3,110 Mortgage — 30 — 30 Installment 14 1 — 15 Residential real estate: Commercial 4,304 253 — 4,557 Mortgage 14,016 8,400 416 22,832 HELOC 1,286 909 77 2,272 Installment 184 1,728 — 1,912 Consumer 2,172 1,017 724 3,913 Leases 1,595 — — 1,595 Total loans $ 117,368 $ 20,888 $ 1,594 $ 139,850 12/31/2019 (In thousands) Nonaccrual Loans Accruing TDRs Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 26,776 $ 6,349 $ 28 $ 33,153 Commercial real estate 39,711 2,080 625 42,416 Construction real estate: Commercial 453 — — 453 Mortgage 25 84 — 109 Installment 72 5 — 77 Residential real estate: Commercial 2,025 — — 2,025 Mortgage 15,271 8,826 1,209 25,306 HELOC 2,062 1,010 44 3,116 Installment 462 1,964 — 2,426 Consumer 3,089 980 645 4,714 Leases 134 — 186 320 Total loans $ 90,080 $ 21,298 $ 2,737 $ 114,115
Schedule of loans individually evaluated for impairment and loans collectively evaluated for impairment	The following table provides additional information regarding those nonaccrual and accruing TDR loans that are individually evaluated for impairment and those collectively evaluated for impairment as of December 31, 2020 and December 31, 2019. 12/31/2020 12/31/2019 (In thousands) Nonaccrual and Accruing TDRs Loans Individually Evaluated for Impairment Loans Collectively Evaluated for Impairment Nonaccrual and Accruing TDRs Loans Individually Evaluated for Impairment Loans Collectively Evaluated for Impairment Commercial, financial and agricultural $ 28,880 $ 28,836 $ 44 $ 33,125 $ 33,088 $ 37 Commercial real estate 70,357 70,357 — 41,791 41,791 — Construction real estate: Commercial 3,110 3,110 — 453 453 — Mortgage 30 — 30 109 — 109 Installment 15 — 15 77 — 77 Residential real estate: Commercial 4,557 4,557 — 2,025 2,025 — Mortgage 22,416 — 22,416 24,097 — 24,097 HELOC 2,195 — 2,195 3,072 — 3,072 Installment 1,912 — 1,912 2,426 — 2,426 Consumer 3,189 — 3,189 4,069 — 4,069 Leases 1,595 1,595 — 134 134 — Total loans $ 138,256 $ 108,455 $ 29,801 $ 111,378 $ 77,491 $ 33,887
Schedule of loans individually evaluated for impairment by class of loan	The following table presents loans individually evaluated for impairment by class of loan as of December 31, 2020 and December 31, 2019. 12/31/2020 12/31/2019 (In thousands) Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated With no related allowance recorded Commercial, financial and agricultural $ 23,316 $ 22,970 $ — $ 21,194 $ 21,010 $ — Commercial real estate 63,639 63,467 — 41,696 41,471 — Construction real estate: Commercial 3,110 3,110 — 453 453 — Residential real estate: Commercial 4,522 4,448 — 1,921 1,854 — Leases 568 568 — — — — With an allowance recorded Commercial, financial and agricultural 5,881 5,866 3,758 12,289 12,078 5,104 Commercial real estate 6,890 6,890 1,316 320 320 35 Construction real estate: Commercial — — — — — — Residential real estate: Commercial 109 109 16 171 171 42 Leases 1,027 1,027 344 134 134 49 Total $ 109,062 $ 108,455 $ 5,434 $ 78,178 $ 77,491 $ 5,230
Schedule of average recorded investment and interest income recognized on loans individually evaluated for impairment	The following table presents the average recorded investment and interest income recognized subsequent to impairment on loans individually evaluated for impairment as of and for the years ended December 31, 2020, 2019, and 2018: Year ended December 31, 2020 (In thousands) Recorded Investment as of December 31, 2020 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 28,836 $ 30,280 $ 735 Commercial real estate 70,357 55,279 1,890 Construction real estate: Commercial 3,110 1,291 50 Residential real estate: Commercial 4,557 4,329 204 Consumer — — — Leases 1,595 1,115 — Total $ 108,455 $ 92,294 $ 2,879 Year ended December 31, 2019 (In thousands) Recorded Investment as of December 31, 2019 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 33,088 $ 21,415 $ 527 Commercial real estate 41,791 32,132 1,241 Construction real estate: Commercial 453 1,987 26 Residential real estate: Commercial 2,025 2,175 99 Consumer — — — Leases 134 59 — Total $ 77,491 $ 57,768 $ 1,893 Year ended December 31, 2018 (In thousands) Recorded Investment as of December 31, 2018 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 15,120 $ 21,000 $ 695 Commercial real estate 28,426 23,024 1,047 Construction real estate: Commercial 1,866 1,709 34 Residential real estate: Commercial 2,732 5,308 114 Consumer — — — Leases — — — Total $ 48,144 $ 51,041 $ 1,890
Schedule of aging of the recorded investment in past due loans	The following tables present the aging of the recorded investment in past due loans as of December 31, 2020 and December 31, 2019 by class of loan. 12/31/2020 (In thousands) Accruing Loans Past Due 30-89 Days Past Due Nonaccrual Loans and Loans Past Due 90 Days or More and Accruing (1) Total Past Due Total Current (2) Total Recorded Investment Commercial, financial and agricultural $ 7,372 $ 13,968 $ 21,340 $ 1,574,177 $ 1,595,517 Commercial real estate 82 972 1,054 1,753,152 1,754,206 Construction real estate: Commercial — 39 39 227,524 227,563 Mortgage 77 — 77 115,647 115,724 Installment 12 — 12 929 941 Residential real estate: Commercial 17 493 510 526,873 527,383 Mortgage 9,538 7,814 17,352 1,079,953 1,097,305 HELOC 805 810 1,615 181,060 182,675 Installment 67 71 138 8,320 8,458 Consumer 5,496 1,213 6,709 1,657,505 1,664,214 Leases 186 984 1,170 23,282 24,452 Total loans $ 23,652 $ 26,364 $ 50,016 $ 7,148,422 $ 7,198,438 (1) Includes an aggregate of $1.6 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans. (2) Includes an aggregate of $92.6 million of nonaccrual loans which are current in regards to contractual principal and interest payments. 12/31/2019 (In thousands) Accruing Loans Past Due 30-89 Days Past Due, Nonaccrual Loans and Loans Past Due 90 Days or More and Accruing (1) Total Past Due Total Current (2) Total Recorded Investment Commercial, financial and agricultural $ 582 $ 12,407 $ 12,989 $ 1,176,514 $ 1,189,503 Commercial real estate 160 1,143 1,303 1,613,681 1,614,984 Construction real estate: Commercial — — — 234,463 234,463 Mortgage 397 — 397 96,405 96,802 Installment 24 — 24 1,468 1,492 Residential real estate: Commercial — 908 908 479,512 480,420 Mortgage 12,841 9,153 21,994 1,155,703 1,177,697 HELOC 652 779 1,431 224,448 225,879 Installment 164 338 502 12,093 12,595 Consumer 6,561 1,621 8,182 1,448,507 1,456,689 Leases 368 186 554 29,547 30,101 Total loans $ 21,749 $ 26,535 $ 48,284 $ 6,472,341 $ 6,520,625 (1) Includes an aggregate of $2.7 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans.
Schedule of recorded investment by loan grade	The tables below present the recorded investment by loan grade at December 31, 2020 and December 31, 2019 for all commercial loans: 12/31/2020 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing TDRs Purchased Credit Impaired (1) Pass-Rated Recorded Commercial, financial and agricultural* $ 14,638 $ — $ 28,880 $ 337 $ 1,551,662 $ 1,595,517 Commercial real estate* 87,439 117 70,357 7,461 1,588,832 $ 1,754,206 Construction real estate: Commercial 164 — 3,110 1,002 223,287 $ 227,563 Residential real estate: Commercial 798 22 4,557 1,510 520,496 $ 527,383 Leases 331 — 1,595 112 22,414 $ 24,452 Total Commercial Loans $ 103,370 $ 139 $ 108,499 $ 10,422 $ 3,906,691 $ 4,129,121 * Included within commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that were not broken out by class. (1) There were no loans acquired with deteriorated credit quality which were nonaccrual or TDRs at December 31, 2020. 12/31/2019 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing TDRs Purchased Credit Impaired (1) Pass Rated Recorded Investment Commercial, financial and agricultural* $ 11,981 $ 3 $ 33,125 $ 966 $ 1,143,428 $ 1,189,503 Commercial real estate* 6,796 945 41,791 9,182 1,556,270 1,614,984 Construction real estate: Commercial 4,857 1 453 1,044 228,108 234,463 Residential real estate: Commercial 3,839 30 2,025 1,754 472,772 480,420 Leases — — 134 523 29,444 30,101 Total Commercial Loans $ 27,473 $ 979 $ 77,528 $ 13,469 $ 3,430,022 $ 3,549,471 * Included within commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that were not broken out by class. (1) Excludes loans acquired with deteriorated credit quality which are nonaccrual or TDRs due to additional credit deterioration or modification post acquisition. These loans had a recorded investment of $6,000 at December 31, 2019.
Schedule of troubled debt restructurings on financing receivables	The following tables detail the number of contracts modified as TDRs during the years ended December 31, 2020, 2019 and 2018 as well as the recorded investment of these contracts at December 31, 2020, 2019, and 2018. The recorded investment pre- and post-modification is generally the same due to the fact that Park does not typically forgive principal. Year ended (In thousands) Number of Contracts Accruing Nonaccrual Recorded Investment Commercial, financial and agricultural 12 $ 107 $ 3,706 $ 3,813 Commercial real estate 9 — 3,235 3,235 Construction real estate: Commercial — — — — Mortgage 1 26 — 26 Installment 1 — 14 14 Residential real estate: Commercial 3 153 3 156 Mortgage 27 888 1,068 1,956 HELOC 7 14 52 66 Installment 18 163 65 228 Consumer 214 218 634 852 Total loans 292 $ 1,569 $ 8,777 $ 10,346 Year ended (In thousands) Number of Contracts Accruing Nonaccrual Recorded Investment Commercial, financial and agricultural 30 $ 6,040 $ 7,821 $ 13,861 Commercial real estate 8 415 7,855 8,270 Construction real estate: Commercial 3 — 415 415 Mortgage 2 77 — 77 Installment — — — — Residential real estate: Commercial 3 — 100 100 Mortgage 21 535 589 1,124 HELOC 18 126 234 360 Installment 34 1,047 28 1,075 Consumer 324 225 1,166 1,391 Total loans 443 $ 8,465 $ 18,208 $ 26,673 Year ended (In thousands) Number of Contracts Accruing Nonaccrual Recorded Investment Commercial, financial and agricultural 21 $ 28 $ 829 $ 857 Commercial real estate 17 414 3,172 3,586 Construction real estate: Commercial 1 — — — Mortgage — — — — Installment 2 10 — 10 Residential real estate: Commercial 3 54 363 417 Mortgage 25 842 854 1,696 HELOC 21 558 86 644 Installment 19 459 69 528 Consumer 283 204 1,249 1,453 Total loans 392 $ 2,569 $ 6,622 $ 9,191
Schedule Of Financing Receivable, Loans Modified As T D R Within Previous Twelve Months That Subsequently Defaulted [Table text Block]	The following table presents the recorded investment in financing receivables which were modified as TDRs within the previous 12 months and for which there was a payment default during the year ended December 31, 2020, December 31, 2019, and December 31, 2018. For this table, a loan is considered to be in default when it becomes 30 days contractually past due under the modified terms. The additional allowance for loan loss resulting from the defaults on TDR loans was immaterial. Year ended Year ended Year ended (In thousands) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial, financial and agricultural 4 $ 2,776 1 $ 20 3 $ 104 Commercial real estate 1 223 — — — — Construction real estate: Commercial — — — — — — Mortgage — — — — — — Installment 1 14 — — — — Residential real estate: Commercial 1 3 — — — — Mortgage 11 993 7 665 8 518 HELOC — — 6 141 2 32 Installment 3 32 — — 1 29 Consumer 34 360 56 539 59 636 Leases — — — — — — Total loans 55 $ 4,401 $ 70 $ 1,365 73 $ 1,319

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2020
Allowance For Loan Losses [Abstract]
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]	The activity in the allowance for loan losses for the years ended December 31, 2020, 2019, and 2018 is summarized in the following tables. Year ended December 31, 2020 (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 20,203 $ 10,229 $ 5,311 $ 8,610 $ 12,211 $ 115 $ 56,679 Charge-offs 1,468 1,824 6 356 6,634 16 10,304 Recoveries (20,765) (738) (1,122) (991) (3,629) (1) (27,246) Net (recoveries) charge-offs (19,297) 1,086 (1,116) (635) 3,005 15 (16,942) (Recovery) Provision (13,892) 14,337 861 2,118 8,212 418 12,054 Ending balance $ 25,608 $ 23,480 $ 7,288 $ 11,363 $ 17,418 518 $ 85,675 Year ended December 31, 2019 (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 16,777 $ 9,768 $ 4,463 $ 8,731 $ 11,773 $ — $ 51,512 Charge-offs 2,231 400 — 239 8,307 — 11,177 Recoveries (1,241) (720) (2,682) (787) (4,742) (1) (10,173) Net charge-offs (recoveries) 990 (320) (2,682) (548) 3,565 (1) 1,004 Provision (Recovery) 4,416 141 (1,834) (669) 4,003 114 6,171 Ending balance $ 20,203 $ 10,229 $ 5,311 $ 8,610 $ 12,211 $ 115 $ 56,679 Year ended December 31, 2018 (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 15,022 $ 9,601 $ 4,430 $ 9,321 $ 11,614 $ — $ 49,988 Charge-offs 2,796 281 72 441 9,962 — 13,552 Recoveries (1,221) (272) (712) (844) (4,078) (4) (7,131) Net charge-offs (recoveries) 1,575 9 (640) (403) 5,884 (4) 6,421 Provision (Recovery) 3,330 176 (607) (993) 6,043 (4) 7,945 Ending balance $ 16,777 $ 9,768 $ 4,463 $ 8,731 $ 11,773 $ — $ 51,512
Schedule of the composition of the allowance for loan losses	The composition of the allowance for loan losses at December 31, 2020 and 2019 was as follows: December 31, 2020 (In thousands) Commercial, financial, and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ 3,758 $ 1,316 $ — $ 16 $ — $ 344 $ 5,434 Collectively evaluated for impairment 21,809 22,093 7,288 11,292 17,418 174 80,074 Acquired with deteriorated credit quality 41 71 — 55 — — 167 Total ending allowance balance $ 25,608 $ 23,480 $ 7,288 $ 11,363 $ 17,418 $ 518 $ 85,675 Loan balance: Loans individually evaluated for impairment $ 28,811 $ 70,334 $ 3,110 $ 4,557 $ — $ 1,595 $ 108,407 Loans collectively evaluated for impairment 1,559,842 1,670,510 339,312 1,806,126 1,659,704 22,731 7,058,225 Loans acquired with deteriorated credit quality 336 7,345 999 2,361 — 112 11,153 Total ending loan balance $ 1,588,989 $ 1,748,189 $ 343,421 $ 1,813,044 $ 1,659,704 $ 24,438 $ 7,177,785 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 13.04 % 1.87 % — % 0.35 % — % 21.57 % 5.01 % Loans collectively evaluated for impairment 1.40 % 1.32 % 2.15 % 0.63 % 1.05 % 0.77 % 1.13 % Loans acquired with deteriorated credit quality 12.20 % 0.97 % — % 2.33 % — % — % 1.50 % Total 1.61 % 1.34 % 2.12 % 0.63 % 1.05 % 2.12 % 1.19 % Recorded investment: Loans individually evaluated for impairment $ 28,836 $ 70,357 $ 3,110 $ 4,557 $ — $ 1,595 $ 108,455 Loans collectively evaluated for impairment 1,566,344 1,676,388 340,116 1,808,892 1,664,214 22,745 7,078,699 Loans acquired with deteriorated credit quality 337 7,461 1,002 2,372 — 112 11,284 Total ending recorded investment $ 1,595,517 $ 1,754,206 $ 344,228 $ 1,815,821 $ 1,664,214 $ 24,452 $ 7,198,438 December 31, 2019 (In thousands) Commercial, financial, and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Ending allowance balance attributed to loans: Individually evaluated for impairment $ 5,104 $ 35 $ — $ 42 $ — $ 49 $ 5,230 Collectively evaluated for impairment 14,948 10,187 5,311 8,458 12,211 66 51,181 Acquired with deteriorated credit quality 151 7 — 110 — — 268 Total ending allowance balance $ 20,203 $ 10,229 $ 5,311 $ 8,610 $ 12,211 $ 115 $ 56,679 Loan balance: Loans individually evaluated for impairment $ 33,077 $ 41,770 $ 453 $ 2,025 $ — $ 134 $ 77,459 Loans collectively evaluated for impairment 1,151,073 1,558,550 330,106 1,888,088 1,452,373 29,424 6,409,614 Loans acquired with deteriorated credit quality (1) 960 9,093 1,140 2,613 2 523 14,331 Total ending loan balance $ 1,185,110 $ 1,609,413 $ 331,699 $ 1,892,726 $ 1,452,375 $ 30,081 $ 6,501,404 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 15.43 % 0.08 % — % 2.07 % — % 36.57 % 6.75 % Loans collectively evaluated for impairment 1.30 % 0.65 % 1.61 % 0.45 % 0.84 % 0.22 % 0.80 % Loans acquired with deteriorated credit quality 15.73 % 0.08 % — % 4.21 % — % — % 1.87 % Total 1.70 % 0.64 % 1.60 % 0.45 % 0.84 % 0.38 % 0.87 % Recorded investment: Loans individually evaluated for impairment $ 33,088 $ 41,791 $ 453 $ 2,025 $ — $ 134 $ 77,491 Loans collectively evaluated for impairment 1,155,449 1,564,011 331,161 1,891,941 1,456,687 29,444 6,428,693 Loans acquired with deteriorated credit quality (1) 966 9,182 1,143 2,625 2 523 14,441 Total ending recorded investment $ 1,189,503 $ 1,614,984 $ 332,757 $ 1,896,591 $ 1,456,689 $ 30,101 $ 6,520,625 (1) Excludes loans acquired with deteriorated credit quality which are individually evaluated for impairment due to additional credit deterioration post acquisition. These loans had a balance of $5,000, a recorded investment of $6,000, and no allowance as of December 31, 2019.
Financing Receivable - High Risk Industries COVID 19 Additional Reserves	A breakout of the 4-rated balances and additional reserve related to these portfolios is detailed in the following table. December 31, 2020 (in thousands) 4-Rated Balance 4-Rated Balance - Originated 4-Rated Balance - Purchased Additional Reserve Hotels and accommodations $ 96,909 $ 93,090 $ 3,819 $ 1,391 Restaurants and food service 33,409 27,880 5,529 637 Strip shopping centers 177,706 156,605 21,101 1,731 Total $ 308,024 $ 277,575 $ 30,449 $ 3,759

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill [Table Text Block]	The following table shows the activity in goodwill and other intangible assets for the years ended December 31, 2020, 2019 and 2018. (in thousands) Goodwill Other Total January 1, 2018 $ 72,334 $ — $ 72,334 Acquired goodwill and other intangible assets 40,405 7,549 47,954 Amortization — 578 578 December 31, 2018 $ 112,739 $ 6,971 $ 119,710 Acquired goodwill and other intangible assets 46,856 8,207 55,063 Amortization — 2,355 2,355 Trade name intangible impairment — 1,300 1,300 December 31, 2019 $ 159,595 $ 11,523 $ 171,118 Acquired goodwill and other intangible assets — — — Amortization — 2,263 2,263 December 31, 2020 $ 159,595 $ 9,260 $ 168,855
Schedule of Finite-Lived Intangible Assets	The following table shows the balance of acquired intangible assets as of December 31, 2020 and 2019. 2020 2019 (in thousands) Gross Carrying Amount Accumulated Amortization/Impairment Gross Carrying Amount Accumulated Amortization Other intangible assets: Core deposit intangibles $ 14,456 $ 5,196 $ 14,456 $ 2,933 Trade name intangible 1,300 1,300 1,300 1,300 Total $ 15,756 $ 6,496 $ 15,756 $ 4,233
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	The following is a schedule of estimated amortization expense for each of the next five years: (in thousands) Total 2021 $ 1,798 2022 1,487 2023 1,323 2024 1,215 2025 1,042

Foreclosed and Repossessed As_2

Foreclosed and Repossessed Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Other Assets [Abstract]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Table Text Block] [Text Block]	Foreclosed and Repossessed Assets Park typically transfers a loan to OREO at the time that Park takes deed/title to the real estate property asset. The carrying amount of foreclosed properties held at December 31, 2020 and December 31, 2019 are listed below, as well as the recorded investment of loans secured by residential real estate properties for which formal foreclosure proceedings were in process at those dates. (In thousands) December 31, 2020 December 31, 2019 OREO: Commercial real estate $ 625 $ 2,295 Construction real estate — 879 Residential real estate 806 855 Total OREO $ 1,431 $ 4,029 Loans in process of foreclosure: Residential real estate $ 1,643 $ 3,959

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of major categories of premises and equipment	The major categories of premises and equipment and accumulated depreciation are summarized as follows: December 31 (In thousands) 2020 2019 Land $ 22,421 $ 23,520 Buildings 97,351 92,857 Equipment, furniture and fixtures 89,390 74,298 Leasehold improvements 6,381 5,386 Total $ 215,543 $ 196,061 Less accumulated depreciation (126,883) (122,739) Premises and equipment, net $ 88,660 $ 73,322
Schedule of Property Subject to or Available for Operating Lease	Park records leased assets where Park acts as the lessor within "Other assets" on the Consolidated Balance Sheets. Equipment subject to lease agreements at December 31, 2020 and 2019 is summarized below: December 31 (In thousands) 2020 2019 Equipment $ 8,561 $ 9,277 Less accumulated depreciation (4,665) (3,911) Leased assets, net $ 3,896 $ 5,366

Investments in Qualified Affo_2

Investments in Qualified Affordable Housing (Tables)	12 Months Ended
	Dec. 31, 2020
Investments in Affordable Housing Projects [Abstract]
Activity in Affordable Housing Program Obligation	The table below details the balances of Park’s affordable housing tax credit investments and related unfunded commitments as of December 31, 2020 and 2019. (In thousands) December 31, 2020 December 31, 2019 Affordable housing tax credit investments $ 56,024 $ 53,070 Unfunded commitments 29,298 25,894

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Schedule of summary of non-interest bearing and interest bearing deposits	At December 31, 2020 and 2019, non-interest bearing and interest bearing deposits were as follows: December 31 (In thousands) 2020 2019 Non-interest bearing $ 2,727,100 $ 1,959,935 Interest bearing 4,845,258 5,092,677 Total $ 7,572,358 $ 7,052,612
Schedule of maturities of time deposits	At December 31, 2020, the maturities of time deposits were as follows: (In thousands) 2021 $ 557,693 2022 209,375 2023 33,338 2024 29,578 2025 34,416 After 5 years 173 Total $ 864,573

Repurchase Agreement Borrowin_2

Repurchase Agreement Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Transfers of Financial Assets Accounted for as Secured Borrowings [Abstract]
Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table Text Block]	The following table presents the carrying value of Park's repurchase agreement borrowings by remaining contractual maturity and collateral pledged at December 31, 2020 and December 31, 2019: December 31, 2020 (In thousands) Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater than 90 days Total U.S. government and agency securities $ 317,230 $ — $ — $ — $ 317,230 December 31, 2019 (In thousands) Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 days 30 - 90 days Greater than 90 days Total U.S. government and agency securities $ 175,657 $ — $ — $ — $ 175,657

Short Term Borrowings (Tables)

Short Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Short-term Debt [Abstract]
Schedule of short-term debt	Short-Term Borrowings Short-term borrowings were as follows: December 31 (In thousands) 2020 2019 Securities sold under agreements to repurchase $ 317,230 $ 175,657 FHLB advances 25,000 55,000 Total short-term borrowings $ 342,230 $ 230,657 The outstanding balances for all short-term borrowings as of December 31, 2020 and 2019 and the weighted-average interest rates as of and paid during each of the years then ended were as follows: (In thousands) Repurchase agreements FHLB Advances 2020 Ending balance $ 317,230 $ 25,000 Highest month-end balance 317,230 25,000 Average daily balance 250,266 26,751 Weighted-average interest rate: As of year-end 0.03 % 0.26 % Paid during the year 0.19 % 2.38 % 2019 Ending balance $ 175,657 $ 55,000 Highest month-end balance 207,079 205,000 Average daily balance 168,449 47,371 Weighted-average interest rate: As of year-end 0.73 % 1.73 % Paid during the year 0.66 % 2.89 %

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of maturities of long-term debt	Long-term debt is listed below: December 31, 2020 2019 (In thousands) Outstanding Balance Interest Rate Outstanding Balance Interest Rate Total Federal Home Loan Bank advances by year of maturity: 2020 $ — — % $ — — % 2021 — — % — — % 2022 — — % 50,000 3.01 % 2023 — — % 100,000 3.40 % 2024 — — % — — % 2025 — — % — — % Thereafter — — % — — % Total $ — — % $ 150,000 3.27 % Total U.S. Bank term note by year of maturity: 2022 $ 32,500 1.84 % 42,500 3.40 % Total $ 32,500 1.84 % 42,500 3.40 % Total combined long-term debt by year of maturity: 2020 $ — — % — — % 2021 — — % — — % 2022 32,500 1.84 % 92,500 3.19 % 2023 — — % 100,000 3.40 % 2024 — — % — — % 2025 — — % — — % Thereafter — — % — — % Total $ 32,500 1.84 % $ 192,500 3.30 %

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	Summary information about Park's interest rate swaps as of December 31, 2020 and December 31, 2019 was as follows: December 31, 2020 December 31, 2019 (In thousands, except weighted average data) Borrowing Derivatives Loan Derivatives Borrowing Derivatives Loan Derivatives Notional amounts $ 25,000 $ 33,310 $ 25,000 $ 35,503 Weighted average pay rates 2.595 % 4.695 % 2.595 % 4.695 % Weighted average receive rates 0.218 % 4.695 % 2.002 % 4.695 % Weighted average maturity (years) 1.5 9.3 2.5 10.2 Unrealized losses $ 885 $ — $ 575 $ —
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The following table presents the net gains (losses), net of income taxes, recorded in AOCI and the Consolidated Statements of Income related to interest rate swaps for the years ended December 31, 2020, 2019 and 2018 . Year ended December 31, 2020 (In thousands) Amount of Gain (Loss) Recognized in OCI (Effective Portion) Amount of Gain (Loss) Reclassified from OCI to Interest Income Amount of Gain (Loss) Recognized in Other Non-interest Income (Ineffective Portion) Interest rate contracts $ (244) $ — $ — Year ended December 31, 2019 (In thousands) Amount of Gain (Loss) Recognized in OCI (Effective Portion) Amount of Gain (Loss) Reclassified from OCI to Interest Income Amount of Gain (Loss) Recognized in Other Non-interest Income (Ineffective Portion) Interest rate contracts $ (454) $ — $ — Year ended December 31, 2018 (In thousands) Amount of Gain (Loss) Recognized in OCI (Effective Portion) Amount of Gain (Loss) Reclassified from OCI to Interest Income Amount of Gain (Loss) Recognized in Other Non-interest Income (Ineffective Portion) Interest rate contracts $ — $ — $ —
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location	The following table reflects the interest rate swaps included in the Consolidated Balance Sheets as of December 31, 2020 and 2019. (In thousands) December 31, 2020 December 31, 2019 Notional Amount Fair Value Notional Amount Fair Value Included in other assets: Borrowing derivatives - interest rate swaps related to FHLB advances $ — $ — $ — $ — Loan derivatives - instruments associated with loans Matched interest rate swaps with borrower 33,310 3,934 24,421 1,781 Matched interest rate swaps with counterparty — — 11,083 89 Total included in other assets $ 33,310 $ 3,934 $ 35,504 $ 1,870 Included in other liabilities: Borrowing derivatives - interest rate swaps related to FHLB advances $ 25,000 $ (885) $ 25,000 $ (575) Loan derivatives - instruments associated with loans Matched interest rate swaps with borrower — — 11,083 (89) Matched interest rate swaps with counterparty 33,310 (3,934) 24,421 (1,781) Total included in other liabilities $ 58,310 $ (4,819) $ 60,504 $ (2,445)

Share Based Compensation (Table

Share Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Restricted Stock Unit, Activity	A summary of changes in the common shares subject to nonvested PBRSUs and TBRSUs for the years ended December 31, 2020 and 2019 follows: Common shares subject to PBRSUs and TBRSUs Nonvested at January 1, 2019 152,631 Granted 74,440 Vested (27,719) Forfeited (1,262) Adjustment for performance conditions of PBRSUs (1) (3,368) Nonvested at January 1, 2020 194,722 Granted 62,265 Vested (44,379) Forfeited (3,101) Adjustment for performance conditions of PBRSUs (1) (5,399) Nonvested at December 31, 2020 (2) 204,108 (1) The number of PBRSUs earned depends on the level of achievement with respect to certain performance criteria. Adjustment herein represents the difference between the maximum number of common shares which could be earned and the actual number earned for those PBRSUs as to which the performance period was completed. (2) Nonvested amount herein represents the maximum number of nonvested PBRSUs and TBRSUs. As of December 31, 2020, an aggregate of 186,331 PBRSUs and TBRSUs are expected to vest.
Share-based Payment Arrangement, Nonvested Award, Cost	The following table details expected additional share-based compensation expense related to PBRSUs and TBRSUs currently outstanding: (In thousands) 2021 $ 3,676 2022 2,439 2023 1,004 2024 160 Total $ 7,279

Benefit Plan (Tables)

Benefit Plan (Tables)	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Schedule of plan assets and benefit obligation activity	Using accrual measurement dates of December 31, 2020 and 2019, plan assets and benefit obligation activity for the Pension Plan are listed below: (In thousands) 2020 2019 Change in fair value of plan assets Fair value at beginning of measurement period $ 210,623 $ 177,077 Actual return on plan assets 27,800 42,402 Employer contributions — — Benefits paid (7,981) (8,856) Fair value at end of measurement period $ 230,442 $ 210,623 Change in benefit obligation Projected benefit obligation at beginning of measurement period $ 154,419 $ 123,528 Service cost 8,319 5,873 Interest cost 5,283 5,491 Plan amendments — (168) Actuarial loss 24,370 28,551 Benefits paid (7,981) (8,856) Projected benefit obligation at the end of measurement period $ 184,410 $ 154,419 Funded status at end of year (fair value of plan assets less benefit obligation) $ 46,032 $ 56,204
Schedule of allocation of plan assets	The asset allocation for the Pension Plan as of each measurement date, by asset category, was as follows: Percentage of Plan Assets Asset category Target Allocation 2020 2019 Equity securities 50% - 100% 84 % 81 % Fixed income and cash equivalents remaining balance 16 % 19 % Total 100 % 100 %
Schedule of assumptions used to determine benefit obligations	The weighted average assumptions used to determine benefit obligations at December 31, 2020, 2019 and 2018 were as follows: 2020 2019 2018 Discount rate 3.00 % 3.53 % 4.60 % Rate of compensation increase Under age 30 8.25 % 10.00 % 10.00 % Ages 30-39 6.00 % 6.00 % 6.00 % Ages 40-49 5.00 % 4.00 % 4.00 % Ages 50-54 4.25 % 3.00 % 3.00 % Ages 55-59 3.75 % 3.00 % 3.00 % Ages 60-64 3.50 % 3.00 % 3.00 % Ages 65 and over 3.25 % 3.00 % 3.00 %
Schedule of estimated future pension benefit Payments	The estimated future pension benefit payments reflecting expected future service for the next ten years are shown below (in thousands): 2021 $ 11,582 2022 11,798 2023 11,672 2024 12,613 2025 12,758 2026-2030 62,929 Total $ 123,352
Schedule of balances of accumulated other comprehensive income loss	The following table shows ending balances of accumulated other comprehensive loss at December 31, 2020 and 2019. (In thousands) 2020 2019 Prior service credit $ 152 $ 168 Net actuarial loss (43,723) (33,933) Total (43,571) (33,765) Deferred taxes 9,150 7,091 Accumulated other comprehensive loss $ (34,421) $ (26,674)
Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss)	Using actuarial measurement dates of December 31 for 2020, 2019 and 2018, components of net periodic benefit income and other amounts recognized in other comprehensive income were as follows: (In thousands) 2020 2019 2018 Affected Line Item in the Consolidated Statements of Income Components of net periodic benefit income (loss) and other amounts recognized in other comprehensive income (loss) Service cost $ (8,319) $ (5,873) $ (6,547) Employee benefits Interest cost (5,283) (5,491) (5,236) Other components of net periodic benefit income Expected return on plan assets 14,410 12,105 13,417 Other components of net periodic benefit income Recognized net actuarial loss and prior service cost (1,175) (1,882) (1,361) Other components of net periodic benefit income Net periodic benefit (loss) income $ (367) $ (1,141) $ 273 Net actuarial (loss) gain and prior service cost $ (10,981) $ 1,913 $ (5,122) Amortization of net loss 1,175 1,882 1,361 Total recognized in other comprehensive (loss) income (9,806) 3,795 (3,761) Total recognized in net benefit (loss) income and other comprehensive (loss) income $ (10,173) $ 2,654 $ (3,488)
Schedule of assumptions used to determine costs	The weighted average assumptions used to determine net periodic benefit income (loss) for the years ended December 31, 2020, 2019 and 2018 are listed below: 2020 2019 2018 Discount rate 3.53 % 4.60 % 3.89 % Rate of compensation increase Under age 30 10.00 % 10.00 % 10.00 % Ages 30-39 6.00 % 6.00 % 6.00 % Ages 40-49 4.00 % 4.00 % 4.00 % Ages 50 and over 3.00 % 3.00 % 3.00 % Expected long-term return on plan assets 7.00 % 7.00 % 7.00 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of deferred tax assets and liabilities	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Corporation’s deferred tax assets and liabilities are as follows: December 31 (In thousands) 2020 2019 Deferred tax assets: Allowance for loan losses $ 19,512 $ 12,120 Accumulated other comprehensive loss – Pension Plan 9,150 7,091 Accumulated other comprehensive loss – Unrealized losses on swaps 186 121 Deferred compensation 3,887 3,131 OREO valuation adjustments 1,012 964 Net deferred loan fees 3,283 1,451 Deferred contract bonus 571 477 Nonvested equity-based compensation 2,567 2,132 Net operating loss ("NOL") carryforward 3,629 4,094 Operating lease liability 3,561 3,097 Other 1,424 843 Total deferred tax assets $ 48,782 $ 35,521 Deferred tax liabilities: Accumulated other comprehensive loss - Unrealized gains on securities $ 10,507 $ 4,662 Fixed assets 3,360 585 Deferred investment income 6,637 6,231 Pension Plan 20,407 19,238 MSRs 2,781 2,153 Partnership adjustments 204 178 Purchase accounting adjustments 604 49 Operating lease right-of-use asset 3,343 2,932 Lessor adjustments 3,433 2,697 Other 398 488 Total deferred tax liabilities $ 51,674 $ 39,213 Net deferred tax liability $ (2,892) $ (3,692)
Federal and state income taxes	The components of the provision for federal income taxes are shown below: December 31, (In thousands) 2020 2019 2018 Currently payable Federal $ 22,769 $ 14,797 $ 12,700 State 1,432 1,191 352 Amortization of qualified affordable housing projects 7,046 6,927 7,322 Deferred Federal (4,812) (815) 481 State 287 (29) 57 Total $ 26,722 $ 22,071 $ 20,912
Schedule of income tax rate reconciliation	The following is a reconciliation of income tax expense to the amount computed at the statutory federal corporate income tax rate of 21% for the years ended December 31, 2020, 2019 and 2018. 2020 2019 2018 Statutory federal corporate income tax rate 21.0 % 21.0 % 21.0 % Changes in rates resulting from: Tax exempt interest income, net of disallowed interest (1.5) % (2.0) % (1.8) % Bank owned life insurance (0.7) % (0.8) % (1.1) % Investments in qualified affordable housing projects, net of tax benefits (1.1) % (1.5) % (1.3) % KSOP dividend deduction (0.6) % (0.6) % (0.6) % Non-taxable gain on NewDominion common stock — % — % (0.6) % Other 0.2 % 1.6 % 0.3 % Effective Tax Rate 17.3 % 17.7 % 15.9 %
Reconciliation of unrecognized tax benefits	The following is a reconciliation of the beginning and ending amount of unrecognized tax benefits. (In thousands) 2020 2019 2018 January 1 Balance $ 954 $ 1,226 $ 664 Additions based on tax positions related to the current year 12 12 10 Additions for tax positions of prior years — 2 781 Reductions for tax positions of prior years — (3) — Reductions due to statute of limitations (333) (283) (229) December 31 Balance $ 633 $ 954 $ 1,226

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of components of other comprehensive income (loss)	Other comprehensive income (loss) components, net of income tax, are shown in the following table for the years ended December 31, 2020, 2019 and 2018. Year ended December 31, Changes in Pension Plan assets and benefit obligations Unrealized gains (losses) on AFS debt securities Unrealized net holding loss on cash flow hedge Total Beginning balance at January 1, 2020 $ (26,674) $ 17,539 $ (454) $ (9,589) Other comprehensive (loss) income before reclassifications (8,675) 25,747 (244) $ 16,828 Amounts reclassified from accumulated other comprehensive loss (income) 928 (2,596) — $ (1,668) Net current period other comprehensive (loss) income $ (7,747) $ 23,151 $ (244) $ 15,160 Ending balance at December 31, 2020 $ (34,421) $ 40,690 $ (698) $ 5,571 Beginning balance at January 1, 2019 $ (29,672) $ (20,116) $ — $ (49,788) Other comprehensive income (loss) before reclassifications (1) 1,511 37,322 (454) $ 38,379 Amounts reclassified from accumulated other comprehensive loss 1,487 333 — $ 1,820 Net current period other comprehensive income (loss) $ 2,998 $ 37,655 $ (454) $ 40,199 Ending balance at December 31, 2019 $ (26,674) $ 17,539 $ (454) $ (9,589) Beginning balance at January 1, 2018, as previously presented $ (23,526) $ (2,928) $ — $ (26,454) Cumulative effect of change in accounting principle for marketable equity securities, net of tax — (995) — (995) Beginning balance at January 1, 2018, as adjusted (23,526) (3,923) — (27,449) Reclassification of disproportionate income tax effects (3,175) (631) — (3,806) Net current period activity Other comprehensive loss before reclassifications (4,046) (17,586) — (21,632) Amounts reclassified from accumulated other comprehensive loss 1,075 2,024 — 3,099 Net current period other comprehensive loss (2,971) (15,562) — (18,533) Ending balance at December 31, 2018 $ (29,672) $ (20,116) $ — $ (49,788) (1) During the year ended December 31, 2019, Park transferred HTM securities with a fair value of $373.9 million to AFS classification. The transfer occurred at fair value and had a related unrealized gain of $24.2 million ($19.1 million net of taxes), recorded in other comprehensive income. The following table provides information concerning amounts reclassified out of accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018: Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in the Consolidated Statements of Income (In thousands) 2020 2019 2018 Amortization of defined benefit pension items Amortization of net loss $ 1,175 1,882 1,361 Employee benefits Income before income taxes 1,175 1,882 1,361 Income before income taxes Income taxes 247 395 286 Income taxes Net of income tax $ 928 $ 1,487 $ 1,075 Net income Unrealized gains & losses on AFS debt securities (Gain) loss on the sale of debt securities $ (3,286) $ 421 $ 2,562 Net gain (loss) on the sale of debt securities (Income) loss before income taxes (3,286) 421 2,562 Income before income taxes Income tax (benefit) expense (690) 88 538 Income taxes Net of income (benefit) tax $ (2,596) $ 333 $ 2,024 Net income

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per common share	The following table sets forth the computation of basic and diluted earnings per common share: Year ended December 31 2020 2019 2018 Numerator: Net income $ 127,923 $ 102,700 $ 110,387 Denominator: Weighted-average common shares outstanding 16,302,825 16,234,342 15,488,982 Effect of dilutive PBRSUs and TBRSUs 104,677 95,114 122,507 Weighted-average common shares outstanding adjusted for the effect of dilutive PBRSUs and TBRSUs 16,407,502 16,329,456 15,611,489 Earnings per common share: Basic earnings per common share $ 7.85 $ 6.33 $ 7.13 Diluted earnings per common share $ 7.80 $ 6.29 $ 7.07

Financial Instruments With Of_2

Financial Instruments With Off-Balance Sheet Risk and Financial Instruments With Concentrations of Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2020
Risks and Uncertainties [Abstract]
Schedule of off-balance sheet financial instruments with credit risk	The total amounts of off-balance sheet financial instruments with credit risk were as follows: December 31 (In thousands) 2020 2019 Loan commitments $ 1,372,182 $ 1,309,896 Standby letters of credit 17,015 17,195

Loan Servicing (Tables)

Loan Servicing (Tables)	12 Months Ended
	Dec. 31, 2020
Transfers and Servicing of Financial Assets [Abstract]
Schedule of servicing assets at amortized value	Activity for MSRs and the related valuation allowance follows: December 31 (In thousands) 2020 2019 2018 MSRs: Carrying amount, net, beginning of year $ 10,070 $ 10,178 $ 9,688 Additions 8,627 2,355 1,591 Amortization (4,123) (1,870) (1,499) Change in valuation allowance (2,364) (593) 398 Carrying amount, net, end of year $ 12,210 $ 10,070 $ 10,178 Valuation allowance: Beginning of year $ 825 $ 232 $ 630 Change in valuation allowance 2,364 593 (398) End of year $ 3,189 $ 825 $ 232

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lease, Cost	Other information related to operating leases for the years ended December 31, 2020 and 2019 follows: (Dollars in thousands) Year ended December 31, 2020 Year ended December 31, 2019 Lease cost Operating lease cost $ 3,463 $ 3,165 Sublease income (352) (383) Total lease cost $ 3,111 $ 2,782 Other information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 3,553 $ 3,192 ROU assets obtained in exchange for new operating lease liabilities 7,821 505 Reductions to ROU assets resulting from reductions to lease obligations $ (3,084) $ (2,855)
Lessee, Operating Lease, Liability, Maturity	At both December 31, 2020 and 2019, Park's operating leases had a weighted average remaining term of 7.2 years. The weighted average discount rate of Park's operating leases was 2.3% and 3.1% at December 31, 2020 and 2019, respectively. Undiscounted cash flows included in lease liabilities at December 31, 2020 have expected contractual payments as follows: (in thousands) December 31, 2020 2021 $ 3,062 2022 2,955 2023 2,840 2024 1,755 2025 1,415 Thereafter 5,404 Total undiscounted minimum lease payments $ 17,431 Less: imputed interest (1,378) Total lease liabilities $ 16,053

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of financial assets and liabilities measured on a recurring basis	The following table presents assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements at December 31, 2020 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2020 Assets Investment securities: Obligations of states and political subdivisions $ — $ 305,218 $ — $ 305,218 U.S. Government sponsored entities’ asset-backed securities — 752,109 — 752,109 Corporate debt securities — 2,014 — $ 2,014 Equity securities 2,026 — 485 2,511 Mortgage loans held for sale — 31,666 — 31,666 Mortgage IRLCs — 1,545 — 1,545 Loan interest rate swaps — 3,934 — 3,934 Liabilities Fair value swap $ — $ — $ 226 $ 226 Borrowing interest rate swap — 885 — $ 885 Loan interest rate swaps — 3,934 — $ 3,934 Fair Value Measurements at December 31, 2019 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2019 Assets Investment securities: Obligations of states and political subdivisions — 320,491 — $ 320,491 U.S. Government sponsored entities’ asset-backed securities $ — $ 889,210 $ — $ 889,210 Equity securities 1,537 — 456 1,993 Mortgage loans held for sale — 12,278 — 12,278 Mortgage IRLCs — 221 — 221 Loan interest rate swaps — 1,870 — $ 1,870 Liabilities Fair value swap $ — $ — $ 226 $ 226 Borrowing interest rate swap — 575 — $ 575 Loan interest rate swaps — 1,870 — $ 1,870 The following methods and assumptions were used by the Company in determining the fair value of the financial assets and liabilities discussed above: Interest rate swaps: The fair values of interest rate swaps are based on valuation models using observable market data as of the measurement date (Level 2). Investment securities: Fair values for investment securities are based on quoted market prices, where available (Level 1). If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments (Level 2). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows (Level 3). Fair value swap: The fair value of the swap agreement entered into with the purchaser of the Visa Class B shares represents an internally developed estimate of the exposure based upon probability-weighted potential Visa litigation losses. Mortgage Interest Rate Lock Commitments: Mortgage IRLCs are based on current secondary market pricing and are classified as Level 2. Mortgage loans held for sale: Mortgage loans held for sale are carried at their fair value. Mortgage loans held for sale are estimated using market prices for similar product types and, therefore, are classified in Level 2.
Schedule of reconciliation of level 3 input for financial instruments measured on recurring basis	The table below is a reconciliation of the beginning and ending balances of the Level 3 inputs for the years ended December 31, 2020 and 2019, for financial instruments measured on a recurring basis and classified as Level 3: Level 3 Fair Value Measurements (In thousands) Equity Securities Fair Value Swap Balance at January 1, 2020 $ 456 $ (226) Total Gains (Losses) Included in other income 29 — Balance at December 31, 2020 $ 485 $ (226) Balance at January 1, 2019 $ 424 $ (226) Total Gains (Losses) Included in other income 32 — Balance at December 31, 2019 $ 456 $ (226)
Schedule of assets and liabilities measured at fair value on a nonrecurring basis	Fair Value Measurements at December 31, 2020 Using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2020 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 6,749 $ 6,749 Residential real estate — — 175 175 Total impaired loans recorded at fair value $ — $ — $ 6,924 $ 6,924 MSRs $ — $ 12,179 $ — $ 12,179 OREO recorded at fair value: Commercial real estate — — — — Residential real estate — — 735 735 Total OREO recorded at fair value $ — $ — $ 735 $ 735 Other repossessed assets $ — $ — $ 3,164 $ 3,164 Fair Value Measurements at December 31, 2019 Using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2019 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 1,873 $ 1,873 Residential real estate — — 217 217 Total impaired loans recorded at fair value $ — $ — $ 2,090 $ 2,090 MSRs $ — $ 5,797 $ — $ 5,797 OREO recorded at fair value: Commercial real estate — — 2,295 2,295 Residential real estate — — 738 738 Total OREO recorded at fair value $ — $ — $ 3,033 $ 3,033 Other repossessed assets $ — $ — $ 3,599 $ 3,599
Impaired Financing Receivables [Table Text Block]	The table below provides additional detail on those impaired loans which are recorded at fair value as well as the remaining impaired loan portfolio not included above. The remaining impaired loans consist of loans which are not collateral dependent as well as loans carried at cost as the fair value of the underlying collateral or the present value of expected future cash flows on each of the loans exceeded the book value for each respective credit. December 31, 2020 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 8,256 $ 269 $ 1,332 $ 6,924 Remaining impaired loans 100,199 386 4,102 96,097 Total impaired loans $ 108,455 $ 655 $ 5,434 $ 103,021 December 31, 2019 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 2,167 $ 313 $ 77 $ 2,090 Remaining impaired loans 75,324 406 5,153 70,171 Total impaired loans $ 77,491 $ 719 $ 5,230 $ 72,261
Schedule of qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis	The following tables present quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2020 and December 31, 2019: December 31, 2020 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 6,749 Sales comparison approach Adj to comparables 0.0% - 139.0% (11.8%) Income approach Capitalization rate 9.3% - 20.0% (10.3%) Cost approach Entrepreneurial profit 10.0% (10.0%) Cost approach Accumulated depreciation 2.6% (2.6%) Residential real estate $ 175 Sales comparison approach Adj to comparables 2.0% - 47.8% (11.9%) Other real estate owned: Residential real estate $ 735 Sales comparison approach Adj to comparables 7.8% - 9.9% (8.9%) December 31, 2019 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 1,873 Sales comparison approach Adj to comparables 0.0% - 56.0% (26.5%) Cost approach Accumulated depreciation 93.1% (93.1%) Residential real estate $ 217 Sales comparison approach Adj to comparables 0.0% - 53.5% (10.8%) Other real estate owned: Commercial real estate $ 2,295 Sales comparison approach Adj to comparables 0.9% - 68.4% (34.7%) Income approach Capitalization rate 13.0% (13.0%) Residential real estate $ 738 Sales comparison approach Adj to comparables 4.6% - 54.6% (39.2%)
Fair value, by balance sheet grouping	The fair value of financial instruments at December 31, 2020 and December 31, 2019, was as follows: December 31, 2020 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 370,474 $ 370,474 $ — $ — $ 370,474 Investment securities (1) 1,059,341 — 1,059,341 — 1,059,341 Other investment securities (2) 2,511 2,026 — 485 2,511 Mortgage loans held for sale 31,666 — 31,666 — 31,666 Mortgage IRLCs 1,545 — 1,545 — 1,545 Impaired loans carried at fair value 6,924 — — 6,924 6,924 Other loans, net 7,051,975 — — 7,072,339 7,072,339 Loans receivable, net $ 7,092,110 $ — $ 33,211 $ 7,079,263 $ 7,112,474 Financial liabilities: Time deposits $ 864,573 $ — $ 870,804 $ — $ 870,804 Other 1,379 1,379 — — 1,379 Deposits (excluding demand deposits) $ 865,952 $ 1,379 $ 870,804 $ — $ 872,183 Short-term borrowings $ 342,230 $ — $ 342,230 $ — $ 342,230 Long-term debt 32,500 — 31,376 — 31,376 Subordinated notes 187,774 — 179,147 — 179,147 Derivative financial instruments - assets: Loan interest rate swaps 3,934 — 3,934 — 3,934 Derivative financial instruments - liabilities: Fair value swap $ 226 $ — $ — $ 226 $ 226 Borrowing interest rate swap 885 — 885 — 885 Loan interest rate swaps 3,934 — 3,934 — 3,934 (1) Includes AFS debt securities. (2) Excludes FHLB stock and FRB stock which are carried at their respective redemption values, investment securities accounted for at modified cost as these investments do not have a readily determinable fair value, and Partnership Investments valued using the NAV practical expedient. December 31, 2019 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 159,956 $ 159,956 $ — $ — $ 159,956 Investment securities (1) 1,209,701 — 1,209,701 — 1,209,701 Other investment securities (2) 1,993 1,537 — 456 1,993 Loans held for sale 12,278 — 12,278 — 12,278 Mortgage IRLCs 221 — 221 — 221 Impaired loans carried at fair value 2,090 — — 2,090 2,090 Other loans, net 6,430,136 — — 6,426,869 6,426,869 Loans receivable, net $ 6,444,725 $ — $ 12,499 $ 6,428,959 $ 6,441,458 Financial liabilities: Time deposits $ 1,139,131 $ — $ 1,145,537 $ — $ 1,145,537 Other 1,273 1,273 — — 1,273 Deposits (excluding demand deposits) $ 1,140,404 $ 1,273 $ 1,145,537 $ — $ 1,146,810 Short-term borrowings $ 230,657 $ — $ 230,657 $ — $ 230,657 Long-term debt 192,500 — 200,726 — 200,726 Subordinated notes 15,000 — 14,372 — 14,372 Derivative financial instruments - assets: Loan interest rate swaps 1,870 — 1,870 — 1,870 Derivative financial instruments - liabilities: Fair value swap $ 226 $ — $ — $ 226 $ 226 Borrowing interest rate swap 575 — 575 — 575 Loan interest rate swaps 1,870 — 1,870 — 1,870 (1) Includes AFS debt securities and HTM debt securities. (2) Excludes FHLB stock and FRB stock which are carried at their respective redemption values, investment securities accounted for at modified cost as these investments do not have a readily determinable fair value, and Partnership Investments valued using the NAV practical expedient.

Capital Ratios (Tables)

Capital Ratios (Tables)	12 Months Ended
	Dec. 31, 2020
Banking Regulation, Total Capital [Abstract]
Schedule of compliance with regulatory capital requirements under banking regulations	The following table indicates the capital ratios for PNB and Park at December 31, 2020 and 2019. As of December 31, 2020 Leverage Tier 1 Common Equity Tier 1 Total PNB 8.59 % 10.66 % 10.66 % 12.16 % Park 9.63 % 11.92 % 11.72 % 15.43 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio - PNB 5.00 % 8.00 % 6.50 % 10.00 % Well-capitalized ratio - Park N/A 6.00 % N/A 10.00 % As of December 31, 2019 Leverage Tier 1 Common Equity Tier 1 Total PNB 8.62 % 11.05 % 11.05 % 12.25 % Park 9.64 % 12.33 % 12.11 % 13.19 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio - PNB 5.00 % 8.00 % 6.50 % 10.00 % Well-capitalized ratio - Park N/A 6.00 % N/A 10.00 %
Schedule of various measures of capital ratio	The following table reflects various measures of capital for Park and PNB: To Be Adequately Capitalized To Be Well-Capitalized (In thousands) Actual Amount Ratio Amount Ratio Amount Ratio At December 31, 2020 Total Risk-Based Capital PNB $ 891,585 12.16 % $ 586,764 8.00 % $ 733,455 10.00 % Park 1,137,305 15.43 % 589,619 8.00 % 737,023 10.00 % Tier 1 Risk-Based Capital PNB $ 782,148 10.66 % $ 440,073 6.00 % $ 586,764 8.00 % Park 878,740 11.92 % 442,214 6.00 % 442,214 6.00 % Leverage Ratio PNB $ 782,148 8.59 % $ 364,079 4.00 % $ 455,098 5.00 % Park 878,740 9.63 % 365,143 4.00 % N/A N/A Common Equity Tier 1 PNB $ 782,148 10.66 % $ 330,055 4.50 % $ 476,746 6.50 % Park 863,740 11.72 % 331,661 4.50 % N/A N/A At December 31, 2019 Total Risk-Based Capital PNB $ 810,880 12.25 % $ 529,480 8.00 % $ 661,850 10.00 % Park 877,108 13.19 % 532,169 8.00 % 665,211 10.00 % Tier 1 Risk-Based Capital PNB $ 731,071 11.05 % $ 397,110 6.00 % $ 529,480 8.00 % Park 820,312 12.33 % 399,127 6.00 % 399,127 6.00 % Leverage Ratio PNB $ 731,071 8.62 % $ 339,092 4.00 % $ 423,866 5.00 % Park 820,312 9.64 % 340,412 4.00 % N/A N/A Common Equity Tier 1 PNB 731,071 11.05 % 297,832 4.50 % 430,202 6.50 % Park 805,312 12.11 % 299,345 4.50 % N/A N/A

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of operating results by Segment	Operating results for the year ended December 31, 2020 (In thousands) PNB GFSC All Other Total Net interest income (expense) $ 326,375 $ 3,785 $ (2,530) $ 327,630 Provision for (recovery of) loan losses 30,813 196 (18,955) 12,054 Other income 124,231 255 1,178 125,664 Other expense 268,938 2,402 15,255 286,595 Income before income taxes 150,855 1,442 2,348 154,645 Income tax expense (benefit) 27,125 303 (706) 26,722 Net income $ 123,730 $ 1,139 $ 3,054 $ 127,923 Balances at December 31, 2020 Assets $ 9,236,915 $ 12,431 $ 29,675 $ 9,279,021 Loans 7,165,840 12,757 (812) 7,177,785 Deposits 7,820,983 2,273 (250,898) 7,572,358 Operating results for the year ended December 31, 2019 (In thousands) PNB GFSC All Other Total Net interest income (expense) $ 293,130 $ 5,013 $ (406) $ 297,737 Provision for (recovery of) loan losses 8,356 754 (2,939) 6,171 Other income 92,392 170 4,631 97,193 Other expense 237,433 3,478 23,077 263,988 Income (loss) before income taxes 139,733 951 (15,913) 124,771 Income tax expense (benefit) 26,133 189 (4,251) 22,071 Net income (loss) $ 113,600 $ 762 $ (11,662) $ 102,700 Balances at December 31, 2019 Assets $ 8,521,537 $ 27,593 $ 9,247 $ 8,558,377 Loans 6,481,644 28,143 (8,383) 6,501,404 Deposits 7,125,111 3,919 (76,418) 7,052,612 Operating results for the year ended December 31, 2018 (In thousands) PNB GFSC All Other Total Net interest income $ 258,547 $ 5,048 $ 3,303 $ 266,898 Provision for (recovery of) loan losses 7,569 1,328 (952) 7,945 Other income 88,981 187 11,933 101,101 Other expense 206,843 3,245 18,667 228,755 Income (loss) before income taxes 133,116 662 (2,479) 131,299 Income tax expense (benefit) 23,644 141 (2,873) 20,912 Net income $ 109,472 $ 521 $ 394 $ 110,387 Balances at December 31, 2018 Assets $ 7,753,848 $ 31,388 $ 19,072 $ 7,804,308 Loans 5,671,173 32,664 (11,705) 5,692,132 Deposits 6,334,796 4,142 (78,078) 6,260,860
Schedule of reconciliation of financial information for the reportable segments to the Corporation’s consolidated totals	The following is a reconciliation of financial information for the reportable segments to the Corporation’s consolidated totals: 2020 (In thousands) Net Interest Income Depreciation Expense Other Expense Income Taxes Assets Deposits Totals for reportable segments $ 330,160 $ 10,814 $ 260,526 $ 27,428 $ 9,249,346 $ 7,823,256 Elimination of intersegment items 1,250 — — — (1,458) (250,898) All other totals - not eliminated (3,780) — 15,255 (706) 31,133 — Totals $ 327,630 $ 10,814 $ 275,781 $ 26,722 $ 9,279,021 $ 7,572,358 2019 (In thousands) Net Interest Income Depreciation Expense Other Expense Income Taxes Assets Deposits Totals for reportable segments $ 298,143 $ 9,112 $ 231,799 $ 26,322 $ 8,549,130 $ 7,129,030 Elimination of intersegment items 1,250 — — — (19,231) (76,418) All other totals - not eliminated (1,656) — 23,077 (4,251) 28,478 — Totals $ 297,737 $ 9,112 $ 254,876 $ 22,071 $ 8,558,377 $ 7,052,612 2018 (In thousands) Net Interest Income Depreciation Expense Other Expense Income Taxes Assets Deposits Totals for reportable segments $ 263,595 $ 8,585 $ 201,503 $ 23,785 $ 7,785,236 $ 6,338,938 Elimination of intersegment items 1,275 — — — (13,482) (78,078) All other totals - not eliminated 2,028 — 18,667 (2,873) 32,554 — Totals $ 266,898 $ 8,585 $ 220,170 $ 20,912 $ 7,804,308 $ 6,260,860

Parent Company Statements (Tabl

Parent Company Statements (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Balance Sheets	Condensed Balance Sheets December 31, 2020 and 2019 (In thousands) 2020 2019 Assets: Cash $ 248,814 $ 73,663 Investment in subsidiaries 969,054 912,162 Debentures receivable from PNB 25,000 25,000 Other receivables from subsidiaries 1,823 9,168 Other investments 5,375 5,001 Other assets 23,333 20,620 Total assets $ 1,273,399 $ 1,045,614 Liabilities: Long-term debt $ 32,500 $ 42,500 Subordinated notes 187,774 15,000 Other payables to subsidiaries 132 10,092 Other liabilities 12,737 9,008 Total liabilities $ 233,143 $ 76,600 Total shareholders’ equity $ 1,040,256 $ 969,014 Total liabilities and shareholders’ equity $ 1,273,399 $ 1,045,614
Statements of Income	Condensed Statements of Income for the years ended December 31, 2020, 2019 and 2018 (In thousands) 2020 2019 2018 Income: Dividends from subsidiaries $ 97,000 $ 97,500 $ 100,000 Interest and dividends 1,250 1,250 1,275 Other 98 4,634 6,068 Total income 98,348 103,384 107,343 Expense: Interest expense 4,311 1,950 617 Other, net 12,234 19,804 14,619 Total expense 16,545 21,754 15,236 Income before income taxes and equity in undistributed income of subsidiaries $ 81,803 $ 81,630 $ 92,107 Income tax benefit 4,390 4,242 4,010 Income before equity in undistributed income of subsidiaries 86,193 85,872 96,117 Equity in undistributed income of subsidiaries 41,730 16,828 14,270 Net income $ 127,923 $ 102,700 $ 110,387 Other comprehensive income (loss) (1) 15,160 40,199 (18,533) Comprehensive income $ 143,083 $ 142,899 $ 91,854 (1) See Consolidated Statements of Comprehensive Income for other comprehensive income (loss) detail.
Statements of Cash Flows	Statements of Cash Flows for the years ended December 31, 2020, 2019 and 2018 (In thousands) 2020 2019 2018 Operating activities: Net income $ 127,923 $ 102,700 $ 110,387 Adjustments to reconcile net income to net cash provided by operating activities: Undistributed income of subsidiaries (41,730) (16,828) (14,270) Compensation expense for issuance of treasury shares to directors 1,274 1,325 1,109 Share-based compensation expense 5,998 4,999 3,954 Gain (loss) on equity securities, net 245 (4,204) (3,267) Decrease (increase) in other assets 6,632 (8,544) (2,073) (Decrease) increase in other liabilities (6,325) 10,006 (163) Net cash provided by operating activities 94,017 89,454 95,677 Investing activities: Outlays for business acquisitions — (28,630) (30,684) Other, net (2,621) 5,723 60 Net cash used in investing activities (2,621) (22,907) (30,624) Financing activities: Cash dividends paid (70,353) (69,113) (63,013) Proceeds from issuance of long-term debt 172,620 50,000 — Repayment of long-term debt (10,000) (7,500) — Repurchase of treasury shares (7,507) (40,535) (5,784) Cash payment for fractional shares (3) (3) (4) Value of common shares withheld to pay employee income taxes (1,002) (827) (610) Net cash provided by (used) in financing activities 83,755 (67,978) (69,411) Increase (decrease) in cash 175,151 (1,431) (4,358) Cash at beginning of year 73,663 75,094 79,452 Cash at end of year $ 248,814 $ 73,663 $ 75,094

Revenue from Contract with Cu_2

Revenue from Contract with Customer (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table presents the Corporation's sources of other income by revenue stream and operating segment for the years ended December 31, 2020, December 31, 2019 and December 31, 2018. Year ended December 31, 2020 Revenue by Operating Segment (in thousands) PNB GFSC All Other Total Income from fiduciary activities Personal trust and agency accounts $ 8,761 $ — $ — $ 8,761 Employee benefit and retirement-related accounts 7,921 — — 7,921 Investment management and investment advisory agency accounts 10,652 — — 10,652 Other 1,539 — — 1,539 Service charges on deposit accounts Non-sufficient funds (NSF) fees 4,999 — — 4,999 Demand deposit account (DDA) charges 2,920 — — 2,920 Other 526 — — 526 Other service income (1) Credit card 2,108 4 — 2,112 HELOC 424 — — 424 Installment 165 — — 165 Real estate 32,827 — 62 32,889 Commercial 1,493 — 528 2,021 Debit card fee income 22,160 — — 22,160 Bank owned life insurance income (2) 4,521 — 268 4,789 ATM fees 1,773 — — 1,773 Gain on the sale of OREO, net 836 — 371 1,207 Net gain on the sale of investment securities (2) 3,286 — — 3,286 Gain (loss) on equity securities, net (2) 2,429 — (247) 2,182 Other components of net periodic pension benefit income (2) 7,759 94 99 7,952 Miscellaneous (3) 7,132 157 97 7,386 Total other income $ 124,231 $ 255 $ 1,178 $ 125,664 (1) Of the $37.6 million of revenue included within "Other service income", approximately $5.2 million is within the scope of ASC 606, with the remaining $32.4 million consisting primarily of residential real estate loan fees which are out of scope. (2) Not within the scope of ASC 606. (3) "Miscellaneous" income includes brokerage income, safe deposit box rentals, and miscellaneous bank fees totaling $7.4 million, all of which are within the scope of ASC 606 . Year ended December 31, 2019 Revenue by Operating Segment (in thousands) PNB GFSC All Other Total Income from fiduciary activities Personal trust and agency accounts $ 9,001 $ — $ — $ 9,001 Employee benefit and retirement-related accounts 7,178 — — 7,178 Investment management and investment advisory agency accounts 10,024 — — 10,024 Other 1,565 — — 1,565 Service charges on deposit accounts Non-sufficient funds (NSF) fees 7,073 — — 7,073 Demand deposit account (DDA) charges 3,105 — — 3,105 Other 657 — — 657 Other service income (1) Credit card 2,354 7 — 2,361 HELOC 403 — 4 407 Installment 256 — (83) 173 Real estate 11,167 — (9) 11,158 Commercial 1,259 — 142 1,401 Debit card fee income 20,250 — — 20,250 Bank owned life insurance income (2) 4,168 — 389 4,557 ATM fees 1,828 — — 1,828 Loss on the sale of OREO, net (110) — (112) (222) Net loss on sale of investment securities (2) (421) — — (421) Gain on equity securities, net (2) 913 — 4,205 5,118 Other components of net periodic pension benefit income (2) 4,587 54 91 4,732 Miscellaneous (3) 7,135 109 4 7,248 Total other income $ 92,392 $ 170 $ 4,631 $ 97,193 (1) Of the $15.5 million of revenue included within "Other service income", approximately $4.9 million is within the scope of ASC 606, with the remaining $10.6 million consisting primarily of residential real estate loan fees which are out of scope. (2) Not within the scope of ASC 606. (3) "Miscellaneous" income includes brokerage income, safe deposit box rentals, and miscellaneous bank fees totaling $7.2 million, all of which are within the scope of ASC 606. Year ended December 31, 2018 Revenue by Operating Segment (in thousands) PNB GFSC All Other Total Income from fiduciary activities Personal trust and agency accounts $ 8,495 $ — $ — $ 8,495 Employee benefit and retirement-related accounts 6,863 — — 6,863 Investment management and investment advisory agency accounts 9,352 — — 9,352 Other 1,583 — — 1,583 Service charges on deposit accounts Non-sufficient funds (NSF) fees 7,483 — — 7,483 Demand deposit account (DDA) charges 3,310 — — 3,310 Other 668 — — 668 Other service income (1) Credit card 2,212 27 — 2,239 HELOC 471 — — 471 Installment 243 — — 243 Real estate 9,079 — — 9,079 Commercial 1,153 — 1,081 2,234 Debit card fee income 17,317 — — 17,317 Bank owned life insurance income (2) 4,903 — 1,912 6,815 ATM fees 1,978 — — 1,978 Gain on the sale of OREO, net 1,440 — 2,795 4,235 Net gain on sale of investment securities (2) (2,271) — — (2,271) Gain on equity securities, net (2) 549 — 4,067 4,616 Other components of net periodic pension benefit income (2) 6,609 75 136 6,820 Gain on sale of non-performing loans 660 — 2,166 2,826 Miscellaneous (3) 6,884 85 (224) 6,745 Total other income $ 88,981 $ 187 $ 11,933 $ 101,101 (1) Of the $14.3 million of revenue included within "Other service income", approximately $5.5 million is within the scope of ASC 606, with the remaining $8.8 million consisting primarily of residential real estate loan fees which are out of scope. (2) Not within the scope of ASC 606. (3) "Miscellaneous" income includes brokerage income, safe deposit box rentals, and miscellaneous bank fees totaling $6.7 million, all of which are within the scope of ASC 606.

Quarterly Financial Data (una_2

Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	The following table is a summary of selected quarterly results of operations for the years ended December 31, 2020 and 2019. Three Months Ended (Dollars in thousands, except share data) March 31 June 30 Sept. 30 Dec. 31 2020: Interest income $ 88,909 $ 87,445 $ 89,566 $ 91,800 Interest expense 12,626 6,259 5,726 5,479 Net interest income 76,283 81,186 83,840 86,321 Provision for (recovery of) loan losses 5,153 12,224 13,836 (19,159) Income before income taxes 27,340 35,127 36,703 55,475 Net income 22,372 29,505 30,846 45,200 Per common share data: Net income per common share - basic 1.37 1.81 1.89 2.77 Net income per common share - diluted 1.36 1.80 1.88 2.75 Weighted-average common shares outstanding - basic 16,303,602 16,296,427 16,300,720 16,310,551 Weighted-average common shares equivalent - diluted 16,425,881 16,375,434 16,393,792 16,434,812 2019: Interest income $ 81,856 $ 92,226 $ 94,589 $ 91,829 Interest expense 14,080 16,375 17,488 14,820 Net interest income 67,776 75,851 77,101 77,009 Provision for (recovery of) loan losses 2,498 1,919 1,967 (213) Income before income taxes 30,476 26,548 37,532 30,215 Net income 25,455 22,163 31,146 23,936 Per common share data: Net income per common share - basic 1.63 1.34 1.90 1.46 Net income per common share - diluted 1.62 1.33 1.89 1.45 Weighted-average common shares outstanding - basic 15,651,541 16,560,545 16,382,798 16,342,485 Weighted-average common shares equivalent - diluted 15,744,777 16,642,571 16,475,741 16,454,553

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Line Items]
Average required reserve balance		$ 89,200,000
Compensating Balance, Amount	$ 0
Other Repossessed Assets	3,600,000	4,200,000
Finite-Lived Intangible Assets, Accumulated Amortization	6,496,000	4,233,000
Financing Receivable, Allowance for credit loss on acquired performing credit	678,000
Trade Names [Member]
Accounting Policies [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 1,300,000	$ 1,300,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Depreciable Lives of Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2020
Minimum | Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, depreciable lives	30 years
Minimum | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, depreciable lives	3 years
Minimum | Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, depreciable lives	5 years
Maximum | Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, depreciable lives	30 years
Maximum | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, depreciable lives	12 years
Maximum | Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, depreciable lives	10 years

Adoption of New Accounting Pr_2

Adoption of New Accounting Pronouncements and Issued Not Yet Effective Accounting Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax	$ 0	$ 19,095	$ 0

Business Combination (Details)

Business Combination (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019	Jul. 01, 2018
Business Acquisition [Line Items]
Business Acquisition, Share Price				$ 3.80
Stock Issued During Period, Shares, Acquisitions		1,037,205	435,457
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 98,275
Payments to Acquire Businesses, Gross	$ 0	28,630	$ 30,684
Goodwill, Acquired During Period	0	46,856	$ 40,405
Business Combination, Acquired Receivable, Fair Value				$ 578,577
Business Combination, Acquired Receivables, Gross Contractual Amount				589,698	$ 277,900
Performing Financial Instruments [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivable, Fair Value				560,200
Business Combination, Acquired Receivables, Gross Contractual Amount				$ 572,600
Carolina Alliance [Member]
Business Acquisition [Line Items]
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	$ 603	8,800
Goodwill, Acquired During Period		$ 46,856
Common Stock [Member]
Business Acquisition [Line Items]
Business Acquisition, Share Price				$ 0.1378

Business Combination - Schedule

Business Combination - Schedule of Business Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019	Jul. 01, 2018
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 0	$ 28,630	$ 30,684
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		98,275
Business Combination, Consideration Transferred		126,905
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				$ 23,799
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities				97,606
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables				578,577	$ 272,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				8,337
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				8,207
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				32,123
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				748,649
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities				632,649
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities				35,951
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				668,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				80,049
Goodwill, Acquired During Period	$ 0	46,856	$ 40,405
Business Combination, Acquired Receivables, Gross Contractual Amount				589,698	$ 277,900
Business Combination, Acquired Receivable, Fair Value				578,577
Commercial Financial Agricultural [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				80,895
Business Combination, Acquired Receivable, Fair Value				80,580
Commercial Real Estate [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				281,425
Business Combination, Acquired Receivable, Fair Value				273,855
Construction Real Estate Commercial [Domain]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				43,106
Business Combination, Acquired Receivable, Fair Value				42,176
Construction Real Estate Mortgage [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				11,130
Business Combination, Acquired Receivable, Fair Value				10,633
Residential Real Estate Commercial [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				48,546
Business Combination, Acquired Receivable, Fair Value				48,684
Residential Real Estate Mortgage [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				30,519
Business Combination, Acquired Receivable, Fair Value				30,969
Residential Real Estate Home Equity Line Of Credit [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				40,825
Business Combination, Acquired Receivable, Fair Value				39,853
Consumer Loan [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				4,813
Business Combination, Acquired Receivable, Fair Value				4,647
Purchased credit impaired [Member]
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				19,850
Business Combination, Acquired Receivable, Fair Value				18,399
Leases
Business Acquisition [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount				28,589
Business Combination, Acquired Receivable, Fair Value				$ 28,781
Carolina Alliance [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period		$ 46,856

Business Combination - Pro Form

Business Combination - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Business Combinations [Abstract]
Business Acquisition, Pro Forma Revenue	$ 304,540	$ 295,656
Business Acquisition, Pro Forma Net Income (Loss)	$ 111,463	$ 118,679
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 6.76	$ 7.18
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 6.72	$ 7.12

Investment Securities (Details)

Investment Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Other than Temporary Impairment Losses, Investments	$ 0	$ 0	$ 0
Pledged Financial Instruments, Not Separately Reported, Securities	329,000,000	370,000,000
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements	349,000,000	197,000,000
Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank	14,000,000	18,000,000
Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 10 Percent of Stockholders' Equity [Table Text Block]	$ 0
Percentage of amount greater than shareholder's equity	10.00%
Debt Securities, Available for Sale, Sold at Gain, Amortized Cost Amount	$ 196,400,000	29,100,000	2,000,000
Debt Securities, Available for Sale, Sold at Loss, Amortized Cost Amount	112,500,000	62,400,000	245,000,000
Debt Securities, Available-for-sale, Realized Gain	3,400,000	271,000	60,000
Debt Securities, Available-for-sale, Realized Loss	64,000	$ 692,000	2,600,000
Debt Securities, Held-to-maturity, Sold, Amount			7,400,000
Debt Securities, Held-to-maturity, Sold, Realized Gain (Loss)			300,000
percent of held to securities sold paid down		96.30%
Debt Securities, Held-to-maturity, Transfer, Amount		$ 373,900,000
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax	0	19,095,000	0
Gain on equity securities, net	2,182,000	$ 5,118,000	4,616,000
Investments [Member]
Investment [Line Items]
Gain on equity securities, net	$ (239,000)		(287,000)
Equity securities
Investment [Line Items]
Gain on equity securities, net			$ 3,500,000

Investment Securities - Schedul

Investment Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,007,834	$ 1,187,499
Gross Unrealized/Unrecognized Holding Gains	52,235	28,425
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	728	6,223
Debt Securities, Available-for-sale	1,059,341	1,209,701
Obligations of States and Political Subdivisions
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	279,245	302,928
Gross Unrealized/Unrecognized Holding Gains	25,973	17,563
Debt Securities, Available-for-sale	305,218	320,491
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	726,589	884,571
Gross Unrealized/Unrecognized Holding Gains	26,248	10,862
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	728	6,223
Debt Securities, Available-for-sale	752,109	$ 889,210
Corporate Debt Securities
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2,000
Gross Unrealized/Unrecognized Holding Gains	14
Debt Securities, Available-for-sale	$ 2,014

Investment Securities - Sched_2

Investment Securities - Schedule of unrealized loss on investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 86,393	$ 237,613
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	695	1,106
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,727	171,805
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	33	5,117
Debt Securities, Available-for-sale, Unrealized Loss Position	91,120	409,418
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	728	6,223
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	86,393	237,613
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	695	1,106
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,727	171,805
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	33	5,117
Debt Securities, Available-for-sale, Unrealized Loss Position	91,120	409,418
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 728	$ 6,223

Investment Securities - Sched_3

Investment Securities - Schedule of contractual maturity of debt securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,007,834	$ 1,187,499
Debt Securities, Available-for-sale	1,059,341	1,209,701
Obligations of States and Political Subdivisions
Investment [Line Items]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	66,449
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	$ 72,860
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield	3.80%
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	$ 212,796
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	$ 232,358
Debt Securities, Available-for-sale, Maturity, after 10 Years, Weighted Average Yield	3.67%
Debt Securities, Available-for-sale, Amortized Cost	$ 279,245	302,928
Debt Securities, Available-for-sale	$ 305,218	320,491
Available for Sale Securities Weighted Avg Yield	3.70%
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 726,589	884,571
Debt Securities, Available-for-sale	$ 752,109	$ 889,210
Available for Sale Securities Weighted Avg Yield	2.14%
Corporate Debt Securities
Investment [Line Items]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	$ 2,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	$ 2,014
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield	4.00%
Debt Securities, Available-for-sale, Amortized Cost	$ 2,000
Debt Securities, Available-for-sale	$ 2,014

Investment Securities - Cost an

Investment Securities - Cost and Equity Method Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Federal home loan bank stock	$ 22,090,000	$ 30,060,000
Federal reserve bank stock	14,653,000	14,653,000
Equity Securities, FV-NI	2,511,000	1,993,000
Equity Securities without Readily Determinable Fair Value, Amount	4,689,000	2,689,000
Alternative Investment	21,522,000	20,411,000
Other Investments and Securities, at Cost	$ 65,465,000	$ 69,806,000
equity investment shares sold	79,697	133,281
Proceeds from Sale of Federal Home Loan Bank Stock	$ 8,000,000	$ 13,300,000
equity investment purchased, shares	0	128,553
Gain on equity securities, net	$ 2,182,000	$ 5,118,000	$ 4,616,000
Payments to Acquire Federal Reserve Bank Stock	0	6,428,000	0
Alternative Investment, income recognized	2,400,000	4,800,000	1,400,000
Investments [Member]
Investment [Line Items]
Gain on equity securities, net	$ (239,000)		$ (287,000)
Common Stock [Member]
Investment [Line Items]
Gain on equity securities, net		$ (345,000)

Loans (Details)

Loans (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 01, 2019	Jul. 01, 2018
Financing Receivable, Impaired [Line Items]
PPP loans originated	$ 543,100,000	$ 337,100,000
SBA PPP Fees received		20,200,000
PPP loans		337,100,000
SBA PPP Fees recognized		13,700,000
Loans and Leases Receivable, Deferred Income		23,600,000	$ 16,300,000
Goodwill, Purchase Accounting Adjustments		(2,403,000)	(3,373,000)	$ (793,000)
Deposit Liabilities Reclassified as Loans Receivable		2,000,000	2,200,000
Business Combination, Acquired Receivables, Gross Contractual Amount					$ 589,698,000	$ 277,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables					578,577,000	272,800,000
Business Combination, Acquired Receivable, Fair Value					578,577,000
Specific Reserves Related To Troubled Debt Restructuring		200,000	2,200,000
TDRs included in nonaccrual loan totals		25,800,000	34,300,000
Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period		103,500,000
Consumer Loan [Member] | Other Restructuring
Financing Receivable, Impaired [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period		2,100,000
Consumer Loan [Member] | Covid Restructuring
Financing Receivable, Impaired [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period		949,000
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period		563,700,000
Commercial Portfolio Segment [Member] | Other Restructuring
Financing Receivable, Impaired [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period		6,300,000
Commercial Portfolio Segment [Member] | Covid Restructuring
Financing Receivable, Impaired [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period		109,000
Executive officers and directors
Financing Receivable, Impaired [Line Items]
Loans due from related party		51,300,000	44,300,000
Loans and Leases Receivable, Related Parties, Additions		600,000	9,200,000
Loans and Leases Receivable, Related Parties, Proceeds		9,700,000	15,300,000
LoansAndLeasesReceivableRelatedPartiesAdvances		12,400,000	8,900,000
Executive officers and directors | Loans
Financing Receivable, Impaired [Line Items]
Loans due from related party		32,000,000	28,700,000
Carolina Alliance [Member]
Financing Receivable, Impaired [Line Items]
Business Combination, Acquired Receivables, Estimated Uncollectible		9,500,000	11,300,000
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Impaired [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount		1,700,000	3,200,000			5,100,000
Business Combination, Acquired Receivable, Fair Value		1,600,000	3,000,000			$ 4,900,000
Financial Asset Acquired with Credit Deterioration [Member] | NewDominion [Member]
Financing Receivable, Impaired [Line Items]
Allowance for Loan and Lease Losses, Loans Acquired		1,000	101,000
Financial Asset Acquired with Credit Deterioration [Member] | Carolina Alliance [Member]
Financing Receivable, Impaired [Line Items]
Business Combination, Acquired Receivables, Gross Contractual Amount		11,800,000	13,800,000		19,900,000
Business Combination, Acquired Receivable, Fair Value					$ 18,400,000
Allowance for Loan and Lease Losses, Loans Acquired		166,000	167,000
Loans
Financing Receivable, Impaired [Line Items]
Goodwill, Purchase Accounting Adjustments		7,200,000	$ 11,700,000
PPP Loans
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Deferred Income		$ 6,500,000

Loans - Schedule of composition

Loans - Schedule of composition of loan portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 7,177,785	$ 6,501,404
Interest Receivable	20,653	19,221
Loans and Leases Receivable, Recorded Investment	7,198,438	6,520,625
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,588,989	1,185,110
Interest Receivable	6,528	4,393
Loans and Leases Receivable, Recorded Investment	1,595,517	1,189,503
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,748,189	1,609,413
Interest Receivable	6,017	5,571
Loans and Leases Receivable, Recorded Investment	1,754,206	1,614,984
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	226,991	233,637
Interest Receivable	572	826
Loans and Leases Receivable, Recorded Investment	227,563	234,463
Construction Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	115,492	96,574
Interest Receivable	232	228
Loans and Leases Receivable, Recorded Investment	115,724	96,802
Construction Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	938	1,488
Interest Receivable	3	4
Loans and Leases Receivable, Recorded Investment	941	1,492
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	526,222	479,081
Interest Receivable	1,161	1,339
Loans and Leases Receivable, Recorded Investment	527,383	480,420
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,096,358	1,176,316
Interest Receivable	947	1,381
Loans and Leases Receivable, Recorded Investment	1,097,305	1,177,697
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	182,028	224,766
Interest Receivable	647	1,113
Loans and Leases Receivable, Recorded Investment	182,675	225,879
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,436	12,563
Interest Receivable	22	32
Loans and Leases Receivable, Recorded Investment	8,458	12,595
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,659,704	1,452,375
Interest Receivable	4,510	4,314
Loans and Leases Receivable, Recorded Investment	1,664,214	1,456,689
Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	24,438	30,081
Interest Receivable	14	20
Loans and Leases Receivable, Recorded Investment	$ 24,452	$ 30,101

Loans - Schedule of recorded in

Loans - Schedule of recorded investment in nonaccrual restructured and loans 90 days past due and accruing (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	$ 117,368	$ 90,080
Restructured Loans	20,888	21,298
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,594	2,737
Financing Receivable Recorded Investment Nonperforming	139,850	114,115
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	23,261	26,776
Restructured Loans	5,619	6,349
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	28
Financing Receivable Recorded Investment Nonperforming	28,880	33,153
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	67,426	39,711
Restructured Loans	2,931	2,080
Financing Receivable, 90 Days or More Past Due, Still Accruing	377	625
Financing Receivable Recorded Investment Nonperforming	70,734	42,416
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	3,110	453
Restructured Loans	0	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financing Receivable Recorded Investment Nonperforming	3,110	453
Construction Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	0	25
Restructured Loans	30	84
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financing Receivable Recorded Investment Nonperforming	30	109
Construction Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	14	72
Restructured Loans	1	5
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financing Receivable Recorded Investment Nonperforming	15	77
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	4,304	2,025
Restructured Loans	253	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financing Receivable Recorded Investment Nonperforming	4,557	2,025
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	14,016	15,271
Restructured Loans	8,400	8,826
Financing Receivable, 90 Days or More Past Due, Still Accruing	416	1,209
Financing Receivable Recorded Investment Nonperforming	22,832	25,306
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	1,286	2,062
Restructured Loans	909	1,010
Financing Receivable, 90 Days or More Past Due, Still Accruing	77	44
Financing Receivable Recorded Investment Nonperforming	2,272	3,116
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	184	462
Restructured Loans	1,728	1,964
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financing Receivable Recorded Investment Nonperforming	1,912	2,426
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	2,172	3,089
Restructured Loans	1,017	980
Financing Receivable, 90 Days or More Past Due, Still Accruing	724	645
Financing Receivable Recorded Investment Nonperforming	3,913	4,714
Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual	1,595	134
Restructured Loans	0	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	186
Financing Receivable Recorded Investment Nonperforming	$ 1,595	$ 320

Loans Schedule of loans individ

Loans Schedule of loans individually and collectively evaluated for impairment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	$ 138,256	$ 111,378
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	108,455	77,491
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	29,801	33,887
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	28,880	33,125
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	28,836	33,088
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	44	37
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	70,357	41,791
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	70,357	41,791
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	0	0
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	3,110	453
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	3,110	453
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	0	0
Construction Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	30	109
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	0	0
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	30	109
Construction Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	15	77
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	0	0
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	15	77
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	4,557	2,025
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	4,557	2,025
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	0	0
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	22,416	24,097
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	0	0
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	22,416	24,097
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	2,195	3,072
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	0	0
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	2,195	3,072
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	1,912	2,426
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	0	0
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	1,912	2,426
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	3,189	4,069
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	0	0
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	3,189	4,069
Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans	1,595	134
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Individually Evaluated for Impairment	1,595	134
Financing Receivable Recorded Investment Nonaccrual And Accruing Restructured Loans, Collectively Evaluated for Impairment	$ 0	$ 0

Loans Schedule of loans indiv_2

Loans Schedule of loans individually evaluated for impairment by class of loan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	$ 5,434,000	$ 5,230,000
Recorded investment, related to loans	13,900,000	12,700,000
Impaired Financing Receivable, Unpaid Principal Balance	109,062,000	78,178,000
Impaired Financing Receivable, Recorded Investment	108,455,000	77,491,000	$ 48,144,000
Partial charge-offs on impaired loans	655,000	719,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5,434,000	5,230,000
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Partial charge-offs on impaired loans	600,000	500,000
Financing Receivable With Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Partial charge-offs on impaired loans	16,000	210,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	23,316,000	21,194,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	22,970,000	21,010,000
Impaired Financing Receivable, Related Allowance	3,758,000	5,104,000
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,881,000	12,289,000
Recorded investment, related to loans	5,866,000	12,078,000
Impaired Financing Receivable, Recorded Investment	28,836,000	33,088,000	15,120,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3,758,000	5,104,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	63,639,000	41,696,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	63,467,000	41,471,000
Impaired Financing Receivable, Related Allowance	1,316,000	35,000
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	6,890,000	320,000
Recorded investment, related to loans	6,890,000	320,000
Impaired Financing Receivable, Recorded Investment	70,357,000	41,791,000	28,426,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,316,000	35,000
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	3,110,000	453,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,110,000	453,000
Impaired Financing Receivable, Recorded Investment	3,110,000	453,000	1,866,000
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,522,000	1,921,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4,448,000	1,854,000
Impaired Financing Receivable, Related Allowance	16,000	42,000
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	109,000	171,000
Recorded investment, related to loans	109,000	171,000
Impaired Financing Receivable, Recorded Investment	4,557,000	2,025,000	$ 2,732,000
Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	568,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	568,000
Impaired Financing Receivable, Related Allowance	344,000	49,000
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,027,000	134,000
Recorded investment, related to loans	1,027,000	134,000
Impaired Financing Receivable, Recorded Investment	1,595,000	134,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 344,000	$ 49,000

Loans Schedule of average recor

Loans Schedule of average recorded investment and interest income recognized on loans individually evaluated for impairment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 108,455	$ 77,491	$ 48,144
Impaired Financing Receivable, Average Recorded Investment	92,294	57,768	51,041
Impaired Financing Receivable, Interest Income, Cash Basis Method	2,879	1,893	1,890
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	28,836	33,088	15,120
Impaired Financing Receivable, Average Recorded Investment	30,280	21,415	21,000
Impaired Financing Receivable, Interest Income, Cash Basis Method	735	527	695
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	70,357	41,791	28,426
Impaired Financing Receivable, Average Recorded Investment	55,279	32,132	23,024
Impaired Financing Receivable, Interest Income, Cash Basis Method	1,890	1,241	1,047
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	3,110	453	1,866
Impaired Financing Receivable, Average Recorded Investment	1,291	1,987	1,709
Impaired Financing Receivable, Interest Income, Cash Basis Method	50	26	34
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	4,557	2,025	2,732
Impaired Financing Receivable, Average Recorded Investment	4,329	2,175	5,308
Impaired Financing Receivable, Interest Income, Cash Basis Method	204	99	$ 114
Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	1,595	134
Impaired Financing Receivable, Average Recorded Investment	$ 1,115	$ 59

Loans Aging of recorded investm

Loans Aging of recorded investment in past due loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	$ 23,652	$ 21,749
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	26,364	26,535
Financing Receivable, Recorded Investment, Past Due	50,016	48,284
Financing Receivable, Not Past Due	7,148,422	6,472,341
Loans and Leases Receivable, Recorded Investment	7,198,438	6,520,625
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,594	2,737
financing receivable non accrual current	92,600	66,300
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	7,372	582
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	13,968	12,407
Financing Receivable, Recorded Investment, Past Due	21,340	12,989
Financing Receivable, Not Past Due	1,574,177	1,176,514
Loans and Leases Receivable, Recorded Investment	1,595,517	1,189,503
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	28
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	82	160
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	972	1,143
Financing Receivable, Recorded Investment, Past Due	1,054	1,303
Financing Receivable, Not Past Due	1,753,152	1,613,681
Loans and Leases Receivable, Recorded Investment	1,754,206	1,614,984
Financing Receivable, 90 Days or More Past Due, Still Accruing	377	625
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	39
Financing Receivable, Recorded Investment, Past Due	39
Financing Receivable, Not Past Due	227,524	234,463
Loans and Leases Receivable, Recorded Investment	227,563	234,463
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Construction Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	77	397
Financing Receivable, Recorded Investment, Past Due	77	397
Financing Receivable, Not Past Due	115,647	96,405
Loans and Leases Receivable, Recorded Investment	115,724	96,802
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Construction Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	12	24
Financing Receivable, Recorded Investment, Past Due	12	24
Financing Receivable, Not Past Due	929	1,468
Loans and Leases Receivable, Recorded Investment	941	1,492
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	17
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	493	908
Financing Receivable, Recorded Investment, Past Due	510	908
Financing Receivable, Not Past Due	526,873	479,512
Loans and Leases Receivable, Recorded Investment	527,383	480,420
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	9,538	12,841
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	7,814	9,153
Financing Receivable, Recorded Investment, Past Due	17,352	21,994
Financing Receivable, Not Past Due	1,079,953	1,155,703
Loans and Leases Receivable, Recorded Investment	1,097,305	1,177,697
Financing Receivable, 90 Days or More Past Due, Still Accruing	416	1,209
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	805	652
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	810	779
Financing Receivable, Recorded Investment, Past Due	1,615	1,431
Financing Receivable, Not Past Due	181,060	224,448
Loans and Leases Receivable, Recorded Investment	182,675	225,879
Financing Receivable, 90 Days or More Past Due, Still Accruing	77	44
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	67	164
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	71	338
Financing Receivable, Recorded Investment, Past Due	138	502
Financing Receivable, Not Past Due	8,320	12,093
Loans and Leases Receivable, Recorded Investment	8,458	12,595
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	5,496	6,561
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	1,213	1,621
Financing Receivable, Recorded Investment, Past Due	6,709	8,182
Financing Receivable, Not Past Due	1,657,505	1,448,507
Loans and Leases Receivable, Recorded Investment	1,664,214	1,456,689
Financing Receivable, 90 Days or More Past Due, Still Accruing	724	645
Leases
Financing Receivable, Impaired [Line Items]
Financing Receivable, Recorded Investment, Accruing Loans 30 to 89 Days Past Due	186	368
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	984	186
Financing Receivable, Recorded Investment, Past Due	1,170	554
Financing Receivable, Not Past Due	23,282	29,547
Loans and Leases Receivable, Recorded Investment	24,452	30,101
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 0	$ 186

Loans Recorded investment by lo

Loans Recorded investment by loan grade (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Total loans	$ 7,177,785,000	$ 6,501,404,000	$ 5,692,132,000
Loans and Leases Receivable, Recorded Investment	7,198,438,000	6,520,625,000
Five Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	103,370,000	27,473,000
Six Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	139,000	979,000
Impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	108,499,000	77,528,000
Purchased credit impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	10,422,000	13,469,000
Pass [Member]
Financing Receivable, Impaired [Line Items]
Total loans	3,906,691,000	3,430,022,000
Recorded Investment [Member]
Financing Receivable, Impaired [Line Items]
Total loans	4,129,121,000	3,549,471,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Recorded Investment	1,595,517,000	1,189,503,000
Commercial Financial And Agricultural [Member] | Five Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	14,638,000	11,981,000
Commercial Financial And Agricultural [Member] | Six Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans		3,000
Commercial Financial And Agricultural [Member] | Impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	28,880,000	33,125,000
Commercial Financial And Agricultural [Member] | Purchased credit impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	337,000	966,000
Commercial Financial And Agricultural [Member] | Pass [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,551,662,000	1,143,428,000
Commercial Financial And Agricultural [Member] | Recorded Investment [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,595,517,000	1,189,503,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Recorded Investment	1,754,206,000	1,614,984,000
Commercial Real Estate Portfolio Segment [Member] | Five Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	87,439,000	6,796,000
Commercial Real Estate Portfolio Segment [Member] | Six Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	117,000	945,000
Commercial Real Estate Portfolio Segment [Member] | Impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	70,357,000	41,791,000
Commercial Real Estate Portfolio Segment [Member] | Purchased credit impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	7,461,000	9,182,000
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,588,832,000	1,556,270,000
Commercial Real Estate Portfolio Segment [Member] | Recorded Investment [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,754,206,000	1,614,984,000
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Recorded Investment	227,563,000	234,463,000
Construction Real Estate Remaining Commercial [Member] | Five Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	164,000	4,857,000
Construction Real Estate Remaining Commercial [Member] | Six Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans		1,000
Construction Real Estate Remaining Commercial [Member] | Impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	3,110,000	453,000
Construction Real Estate Remaining Commercial [Member] | Purchased credit impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,002,000	1,044,000
Construction Real Estate Remaining Commercial [Member] | Pass [Member]
Financing Receivable, Impaired [Line Items]
Total loans	223,287,000	228,108,000
Construction Real Estate Remaining Commercial [Member] | Recorded Investment [Member]
Financing Receivable, Impaired [Line Items]
Total loans	227,563,000	234,463,000
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Recorded Investment	527,383,000	480,420,000
Residential Real Estate Commercial [Member] | Five Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	798,000	3,839,000
Residential Real Estate Commercial [Member] | Six Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	22,000	30,000
Residential Real Estate Commercial [Member] | Impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	4,557,000	2,025,000
Residential Real Estate Commercial [Member] | Purchased credit impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,510,000	1,754,000
Residential Real Estate Commercial [Member] | Pass [Member]
Financing Receivable, Impaired [Line Items]
Total loans	520,496,000	472,772,000
Residential Real Estate Commercial [Member] | Recorded Investment [Member]
Financing Receivable, Impaired [Line Items]
Total loans	527,383,000	480,420,000
Leases
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Recorded Investment	24,452,000	30,101,000
Leases | Five Rated [Member]
Financing Receivable, Impaired [Line Items]
Total loans	331,000
Leases | Impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	1,595,000	134,000
Leases | Purchased credit impaired [Member]
Financing Receivable, Impaired [Line Items]
Total loans	112,000	523,000
Leases | Pass [Member]
Financing Receivable, Impaired [Line Items]
Total loans	22,414,000	29,444,000
Leases | Recorded Investment [Member]
Financing Receivable, Impaired [Line Items]
Total loans	$ 24,452,000	30,101,000
Commercial Portfolio Segment [Member] | Purchased credit impaired [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Total loans		5,000
Loans and Leases Receivable, Recorded Investment		$ 6,000

Loans Schedule of troubled debt

Loans Schedule of troubled debt restructurings on financing receivables (Details)	12 Months Ended
	Dec. 31, 2020USD ($)contracts	Dec. 31, 2019USD ($)contracts	Dec. 31, 2018USD ($)contracts
Financing Receivable, Impaired [Line Items]
Troubled Debt Restructuring, Classification removed	$ 2,300,000	$ 38,000
TDRs included in nonaccrual loan totals	25,800,000	34,300,000
Nonaccrual TDRs considered current	12,900,000	23,200,000
TDRs included in accruing loan totals	20,900,000	21,300,000
Loans and Leases Receivable, Impaired, Commitment to Lend	6,700,000	7,900,000
Specific Reserves Related To Troubled Debt Restructuring	200,000	2,200,000
Additional specific reserves related to troubled debt restructuring	7,000	1,300	$ 200,000
Modified substandard commercial loans, total recorded investment	200,000	600,000
Modified substandard consumer loans total recorded investment	57,900,000	36,200,000
Nonaccrual loans not classified as TDRs at prior fiscal year end	$ 400,000	$ 2,100,000	$ 500,000
Financing Receivable, Modifications, Number of Contracts | contracts	292	443	392
Total Recorded Investment Modified as TDRs During Period	$ 10,346,000	$ 26,673,000	$ 9,191,000
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	1,569,000	8,465,000	2,569,000
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 8,777,000	$ 18,208,000	$ 6,622,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	12	30	21
Total Recorded Investment Modified as TDRs During Period	$ 3,813,000	$ 13,861,000	$ 857,000
Commercial Financial And Agricultural [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	107,000	6,040,000	28,000
Commercial Financial And Agricultural [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 3,706,000	$ 7,821,000	$ 829,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	9	8	17
Total Recorded Investment Modified as TDRs During Period	$ 3,235,000	$ 8,270,000	$ 3,586,000
Commercial Real Estate Portfolio Segment [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period		415,000	414,000
Commercial Real Estate Portfolio Segment [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 3,235,000	$ 7,855,000	$ 3,172,000
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	0	3	1
Total Recorded Investment Modified as TDRs During Period		$ 415,000
Construction Real Estate Remaining Commercial [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period		$ 415,000
Construction Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	1	2	0
Total Recorded Investment Modified as TDRs During Period	$ 26,000	$ 77,000
Construction Real Estate Mortgage [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 26,000	$ 77,000	$ 0
Construction Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	1	0	2
Total Recorded Investment Modified as TDRs During Period	$ 14,000		$ 10,000
Construction Real Estate Installment [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	0	$ 0	$ 10,000
Construction Real Estate Installment [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 14,000
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	3	3	3
Total Recorded Investment Modified as TDRs During Period	$ 156,000	$ 100,000	$ 417,000
Residential Real Estate Commercial [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	153,000		54,000
Residential Real Estate Commercial [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 3,000	$ 100,000	$ 363,000
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	27	21	25
Total Recorded Investment Modified as TDRs During Period	$ 1,956,000	$ 1,124,000	$ 1,696,000
Residential Real Estate Mortgage [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	888,000	535,000	842,000
Residential Real Estate Mortgage [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 1,068,000	$ 589,000	$ 854,000
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	7	18	21
Total Recorded Investment Modified as TDRs During Period	$ 66,000	$ 360,000	$ 644,000
Residential Real Estate Home Equity Line Of Credit [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	14,000	126,000	558,000
Residential Real Estate Home Equity Line Of Credit [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 52,000	$ 234,000	$ 86,000
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	18	34	19
Total Recorded Investment Modified as TDRs During Period	$ 228,000	$ 1,075,000	$ 528,000
Residential Real Estate Installment [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	163,000	1,047,000	459,000
Residential Real Estate Installment [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 65,000	$ 28,000	$ 69,000
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	214	324	283
Total Recorded Investment Modified as TDRs During Period	$ 852,000	$ 1,391,000	$ 1,453,000
Consumer Portfolio Segment [Member] | Accruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	218,000	225,000	204,000
Consumer Portfolio Segment [Member] | Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Impaired [Line Items]
Total Recorded Investment Modified as TDRs During Period	$ 634,000	$ 1,166,000	$ 1,249,000

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructuring with subsequent default (Details)	12 Months Ended
	Dec. 31, 2020USD ($)contracts	Dec. 31, 2019USD ($)contracts	Dec. 31, 2018USD ($)contracts
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	55	70	73
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 4,401,000	$ 1,365,000	$ 1,319,000
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	3,700,000	1,000,000	1,200,000
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 706,000	$ 350,000	$ 86,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	4	1	3
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 2,776,000	$ 20,000	$ 104,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	1	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 223,000
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	0	0	0
Construction Real Estate Mortgage [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	0	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0
Construction Real Estate Installment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	1	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 14,000
Residential Real Estate Commercial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	1	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 3,000
Residential Real Estate Mortgage [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	11	7	8
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 993,000	$ 665,000	$ 518,000
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	0	6	2
Financing Receivable, Troubled Debt Restructuring, Subsequent Default		$ 141,000	$ 32,000
Residential Real Estate Installment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	3	0	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 32,000		$ 29,000
Consumer Loan [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	34	56	59
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 360,000	$ 539,000	$ 636,000
Leases
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contracts	0	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0

Allowance for Loan Losses Activ

Allowance for Loan Losses Activity in the allowance for loan losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	$ 85,675	$ 56,679	$ 51,512	$ 49,988
Financing Receivable, Allowance for Credit Losses, Write-downs	10,304	11,177	13,552
Financing Receivable, Allowance for Credit Losses, Recovery	27,246	10,173	7,131
Financing Receivables Allowance For Credit Losses Net Charge Offs	(16,942)	1,004	6,421
Provision for Loan, Lease, and Other Losses	12,054	6,171	7,945
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	25,608	20,203	16,777	15,022
Financing Receivable, Allowance for Credit Losses, Write-downs	1,468	2,231	2,796
Financing Receivable, Allowance for Credit Losses, Recovery	20,765	1,241	1,221
Financing Receivables Allowance For Credit Losses Net Charge Offs	(19,297)	990	1,575
Provision for Loan, Lease, and Other Losses	(13,892)	4,416	3,330
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	23,480	10,229	9,768	9,601
Financing Receivable, Allowance for Credit Losses, Write-downs	1,824	400	281
Financing Receivable, Allowance for Credit Losses, Recovery	738	720	272
Financing Receivables Allowance For Credit Losses Net Charge Offs	1,086	(320)	9
Provision for Loan, Lease, and Other Losses	14,337	141	176
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	7,288	5,311	4,463	4,430
Financing Receivable, Allowance for Credit Losses, Write-downs	6	0	72
Financing Receivable, Allowance for Credit Losses, Recovery	1,122	2,682	712
Financing Receivables Allowance For Credit Losses Net Charge Offs	(1,116)	(2,682)	(640)
Provision for Loan, Lease, and Other Losses	861	(1,834)	(607)
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	11,363	8,610	8,731	9,321
Financing Receivable, Allowance for Credit Losses, Write-downs	356	239	441
Financing Receivable, Allowance for Credit Losses, Recovery	991	787	844
Financing Receivables Allowance For Credit Losses Net Charge Offs	(635)	(548)	(403)
Provision for Loan, Lease, and Other Losses	2,118	(669)	(993)
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	17,418	12,211	11,773	11,614
Financing Receivable, Allowance for Credit Losses, Write-downs	6,634	8,307	9,962
Financing Receivable, Allowance for Credit Losses, Recovery	3,629	4,742	4,078
Financing Receivables Allowance For Credit Losses Net Charge Offs	3,005	3,565	5,884
Provision for Loan, Lease, and Other Losses	8,212	4,003	6,043
Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses	518	115	0	$ 0
Financing Receivable, Allowance for Credit Losses, Write-downs	16	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	1	1	4
Financing Receivables Allowance For Credit Losses Net Charge Offs	15	(1)	(4)
Provision for Loan, Lease, and Other Losses	$ 418	$ 114	$ (4)

Allowance for Loan Losses Compo

Allowance for Loan Losses Composition (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		$ 5,434,000			$ 5,230,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		80,074,000			51,181,000
Acquired with deteriorated credit quality		167,000			268,000
Financing Receivable, Allowance for Credit Losses		85,675,000			56,679,000
Financing Receivable, Individually Evaluated for Impairment		108,407,000			77,459,000
Financing Receivable, Collectively Evaluated for Impairment		7,058,225,000			6,409,614,000
Loans acquired with deteriorated credit quality		11,153,000			14,331,000
Loans and Leases Receivable, Net of Deferred Income		$ 7,177,785,000			$ 6,501,404,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		5.01%			6.75%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		1.13%			0.80%
Loans acquired with deteriorated credit quality		1.50%			1.87%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		1.19%			0.87%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 108,455,000			$ 77,491,000
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		7,078,699,000			6,428,693,000
Loans acquired with deteriorated credit quality		11,284,000			14,441,000
Loans and Leases Receivable, Recorded Investment		7,198,438,000			6,520,625,000
Total loans		$ 7,177,785,000			$ 6,501,404,000	$ 5,692,132,000
Loans and Leases Receivable, Allowance, Environmental Risk Factor	0.825%	0.855%	0.75%	0.675%	0.60%
PPP loans originated	$ 543,100,000	$ 337,100,000
7000 Hotels, Rooming Houses, Camps and Other Lodging Places
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		96,909,000
Loans and Leases Receivable, Net of Deferred Income		181,400,000
Additional Reserve Pandemic Risk		1,391,000
722110 Full-Service Restaurants
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		33,409,000
Additional Reserve Pandemic Risk		637,000
5331 Retail, Variety Stores
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		177,706,000
Additional Reserve Pandemic Risk		1,731,000
Hotels, Restaurants, Strip Shopping Total
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		308,024,000
Additional Reserve Pandemic Risk		3,759,000
Purchased credit impaired [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		10,422,000			$ 13,469,000
Financial Asset Originated | 7000 Hotels, Rooming Houses, Camps and Other Lodging Places
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		93,090,000
Additional Reserve Pandemic Risk		1,800,000
Financial Asset Originated | 722110 Full-Service Restaurants
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		27,880,000
Financial Asset Originated | 5331 Retail, Variety Stores
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		156,605,000
Financial Asset Originated | Hotels, Restaurants, Strip Shopping Total
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		277,575,000
Financial Asset Acquired and No Credit Deterioration | 7000 Hotels, Rooming Houses, Camps and Other Lodging Places
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		3,819,000
Financial Asset Acquired and No Credit Deterioration | 722110 Full-Service Restaurants
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		5,529,000
Financial Asset Acquired and No Credit Deterioration | 5331 Retail, Variety Stores
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		21,101,000
Financial Asset Acquired and No Credit Deterioration | Hotels, Restaurants, Strip Shopping Total
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collectively Evaluated for Impairment		30,449,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		3,758,000			5,104,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		21,809,000			14,948,000
Acquired with deteriorated credit quality		41,000			151,000
Financing Receivable, Allowance for Credit Losses		25,608,000			20,203,000
Financing Receivable, Individually Evaluated for Impairment		28,811,000			33,077,000
Financing Receivable, Collectively Evaluated for Impairment		1,559,842,000			1,151,073,000
Loans acquired with deteriorated credit quality		336,000			960,000
Loans and Leases Receivable, Net of Deferred Income		$ 1,588,989,000			$ 1,185,110,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		13.04%			15.43%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		1.40%			1.30%
Loans acquired with deteriorated credit quality		12.20%			15.73%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		1.61%			1.70%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 28,836,000			$ 33,088,000
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		1,566,344,000			1,155,449,000
Loans acquired with deteriorated credit quality		337,000			966,000
Loans and Leases Receivable, Recorded Investment		1,595,517,000			1,189,503,000
Commercial Financial And Agricultural [Member] | Purchased credit impaired [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		337,000			966,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		1,316,000			35,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		22,093,000			10,187,000
Acquired with deteriorated credit quality		71,000			7,000
Financing Receivable, Allowance for Credit Losses		23,480,000			10,229,000
Financing Receivable, Individually Evaluated for Impairment		70,334,000			41,770,000
Financing Receivable, Collectively Evaluated for Impairment		1,670,510,000			1,558,550,000
Loans acquired with deteriorated credit quality		7,345,000			9,093,000
Loans and Leases Receivable, Net of Deferred Income		$ 1,748,189,000			$ 1,609,413,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		1.87%			0.08%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		1.32%			0.65%
Loans acquired with deteriorated credit quality		0.97%			0.08%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		1.34%			0.64%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 70,357,000			$ 41,791,000
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		1,676,388,000			1,564,011,000
Loans acquired with deteriorated credit quality		7,461,000			9,182,000
Loans and Leases Receivable, Recorded Investment		1,754,206,000			1,614,984,000
Commercial Real Estate Portfolio Segment [Member] | Purchased credit impaired [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		7,461,000			9,182,000
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		7,288,000			5,311,000
Acquired with deteriorated credit quality		0			0
Financing Receivable, Allowance for Credit Losses		7,288,000			5,311,000
Financing Receivable, Individually Evaluated for Impairment		3,110,000			453,000
Financing Receivable, Collectively Evaluated for Impairment		339,312,000			330,106,000
Loans acquired with deteriorated credit quality		999,000			1,140,000
Loans and Leases Receivable, Net of Deferred Income		$ 343,421,000			$ 331,699,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		0.00%			0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		2.15%			1.61%
Loans acquired with deteriorated credit quality		0.00%			0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		2.12%			1.60%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 3,110,000			$ 453,000
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		340,116,000			331,161,000
Loans acquired with deteriorated credit quality		1,002,000			1,143,000
Loans and Leases Receivable, Recorded Investment		344,228,000			332,757,000
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		16,000			42,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		11,292,000			8,458,000
Acquired with deteriorated credit quality		55,000			110,000
Financing Receivable, Allowance for Credit Losses		11,363,000			8,610,000
Financing Receivable, Individually Evaluated for Impairment		4,557,000			2,025,000
Financing Receivable, Collectively Evaluated for Impairment		1,806,126,000			1,888,088,000
Loans acquired with deteriorated credit quality		2,361,000			2,613,000
Loans and Leases Receivable, Net of Deferred Income		$ 1,813,044,000			$ 1,892,726,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		0.35%			2.07%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		0.63%			0.45%
Loans acquired with deteriorated credit quality		2.33%			4.21%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		0.63%			0.45%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 4,557,000			$ 2,025,000
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		1,808,892,000			1,891,941,000
Loans acquired with deteriorated credit quality		2,372,000			2,625,000
Loans and Leases Receivable, Recorded Investment		1,815,821,000			1,896,591,000
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		17,418,000			12,211,000
Acquired with deteriorated credit quality		0			0
Financing Receivable, Allowance for Credit Losses		17,418,000			12,211,000
Financing Receivable, Individually Evaluated for Impairment		0			0
Financing Receivable, Collectively Evaluated for Impairment		1,659,704,000			1,452,373,000
Loans acquired with deteriorated credit quality		0			2,000
Loans and Leases Receivable, Net of Deferred Income		$ 1,659,704,000			$ 1,452,375,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		0.00%			0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		1.05%			0.84%
Loans acquired with deteriorated credit quality		0.00%			0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		1.05%			0.84%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 0			$ 0
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		1,664,214,000			1,456,687,000
Loans acquired with deteriorated credit quality		0			2,000
Loans and Leases Receivable, Recorded Investment		1,664,214,000			1,456,689,000
Leases
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		344,000			49,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		174,000			66,000
Acquired with deteriorated credit quality		0			0
Financing Receivable, Allowance for Credit Losses		518,000			115,000
Financing Receivable, Individually Evaluated for Impairment		1,595,000			134,000
Financing Receivable, Collectively Evaluated for Impairment		22,731,000			29,424,000
Loans acquired with deteriorated credit quality		112,000			523,000
Loans and Leases Receivable, Net of Deferred Income		$ 24,438,000			$ 30,081,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment		21.57%			36.57%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment		0.77%			0.22%
Loans acquired with deteriorated credit quality		0.00%			0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans		2.12%			0.38%
Loans And Leases Receivable, Recorded Investment, Individually Evaluated for Impairment		$ 1,595,000			$ 134,000
Loans And Leases Receivable, Recorded Investment, Collectively Evaluated for Impairment		22,745,000			29,444,000
Loans acquired with deteriorated credit quality		112,000			523,000
Loans and Leases Receivable, Recorded Investment		24,452,000			30,101,000
Leases | Purchased credit impaired [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		112,000			523,000
Commercial Portfolio Segment [Member] | Performing acquired loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		678,000
Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Purchased credit impaired [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment		$ 167,000			268,000
Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Nonperforming Financial Instruments [Member] | Purchased credit impaired [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment					0
Loans and Leases Receivable, Recorded Investment					6,000
Total loans					$ 5,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets Schedule of Goodwill and Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 159,595	$ 159,595	$ 112,739	$ 72,334
Other Intangible Assets, Net	9,260	11,523	6,971	0
Intangible Assets, Net (Including Goodwill)	168,855	171,118	119,710	$ 72,334
Goodwill, Acquired During Period	0	46,856	40,405
Indefinite-lived Intangible Assets Acquired	0	8,207	7,549
Acquired goodwill and intangibles	0	55,063	47,954
Amortization of Intangible Assets	$ 2,263	2,355	$ 578
Impairment of Intangible Assets, Finite-lived		$ 1,300

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets Acquired Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 14,456
Finite-Lived Intangible Assets, Accumulated Amortization	$ 6,496	4,233
Intangible Assets, Gross (Excluding Goodwill)	15,756	15,756
Amortization of Intangible Assets	2,263	2,355	$ 578
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	14,456
Finite-Lived Intangible Assets, Accumulated Amortization	5,196	2,933
Amortization of Intangible Assets	2,300	2,400	$ 600
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,300	1,300
Finite-Lived Intangible Assets, Accumulated Amortization	$ 1,300	$ 1,300

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets Future amortization expense (Details) $ in Thousands	Dec. 31, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 1,798
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,487
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,323
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,215
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 1,042

Mortgage Loans Held for Sale (D

Mortgage Loans Held for Sale (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 31,666,000	$ 12,278,000
Gain (Loss) on Sale of Mortgage Loans	753,000	153,000
Loans held for sale - lower of cost or market		0
Real Estate Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	30,900,000	$ 12,100,000
Impaired [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale - lower of cost or market	4,400,000		$ 174,000
Gain (Loss) on Sale of Loans and Leases	$ 0		$ 2,800,000

Foreclosed and Repossessed As_3

Foreclosed and Repossessed Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other real estate owned	$ 1,431	$ 4,029
Commercial Real Estate [Member]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other real estate owned	625	2,295
Construction Real Estate [Member]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other real estate owned	0	879
Residential real estate
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other real estate owned	806	855
Mortgage Loans in Process of Foreclosure, Amount	$ 1,643	$ 3,959

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	$ 215,543	$ 196,061
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	126,883	122,739
Property, Plant and Equipment, Net	88,660	73,322
Depreciation, Depletion and Amortization, Nonproduction	10,800	9,100	$ 8,600
Property Subject to or Available for Operating Lease, Gross	8,561	9,277
Property Subject to or Available for Operating Lease, Accumulated Depreciation	4,665	3,911
Property Subject to or Available for Operating Lease, Net	3,896	5,366
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	1,800	1,300	$ 26
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	22,421	23,520
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	97,351	92,857
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	89,390	74,298
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment, Gross	$ 6,381	$ 5,386

Investments in Qualified Affo_3

Investments in Qualified Affordable Housing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 56,024	$ 53,070
Affordable Housing Program Obligation	29,298	25,894
Amortization Method Qualified Affordable Housing Project Investments, Amortization	7,046	6,927	$ 7,322
Affordable Housing Tax Credits and Other Tax Benefits, Amount	8,700	8,800	$ 9,000
Qualified Affordable Housing [Domain]
Investment [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 56,024	$ 53,070

Deposits Summary of Deposits (D

Deposits Summary of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deposits [Abstract]
Non-interest bearing	$ 2,727,100	$ 1,959,935
Interest-bearing Deposit Liabilities	4,845,258	5,092,677
Total deposits	$ 7,572,358	$ 7,052,612	$ 6,260,860

Deposits Maturity of time depos

Deposits Maturity of time deposits (Details) $ in Thousands	Dec. 31, 2020USD ($)
Deposits [Abstract]
Time Deposit Maturities, Next Twelve Months	$ 557,693
Time Deposit Maturities, Year Two	209,375
Time Deposit Maturities, Year Three	33,338
Time Deposit Maturities, Year Four	29,578
Time Deposit Maturities, Year Five	34,416
Time Deposit Maturities, after Year Five	173
Time Deposits	$ 864,573

Deposits (Details)

Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deposits [Abstract]
Deposits received from executive officers, directors, and their related interests	$ 20.2	$ 17.7
Time Deposits, $250,000 or more	$ 77.2	$ 96

Repurchase Agreement Borrowin_3

Repurchase Agreement Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	$ 317,230	$ 175,657
Pledged Assets Separately Reported, Securities Pledged for Repurchase Agreements, at Fair Value	366,000	200,000
Available unpledged securities	439,000	756,000
Maturity Overnight [Member]
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	317,230	175,657
Maturity Less than 30 Days [Member]
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	0	0
Maturity 30 to 90 Days [Member]
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	0	0
Maturity Greater than 90 Days [Member]
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	$ 0	$ 0

Short Term Borrowings (Details)

Short Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Other Short-term Borrowings	$ 317,230	$ 175,657
Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months	25,000	55,000
Short-term Debt, Total	342,230	230,657
Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank	14,000	18,000
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt, Total	317,230	175,657
Short-term Debt, Maximum Month-end Outstanding Amount	317,230	207,079
Short-term Debt, Average Outstanding Amount	$ 250,266	$ 168,449
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0.03%	0.73%
Short-term Debt, Weighted Average Interest Rate, over Time	0.19%	0.66%
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Short-term Debt, Total	$ 25,000	$ 55,000
Short-term Debt, Maximum Month-end Outstanding Amount	25,000	205,000
Short-term Debt, Average Outstanding Amount	$ 26,751	$ 47,371
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0.26%	1.73%
Short-term Debt, Weighted Average Interest Rate, over Time	2.38%	2.89%
Pledged Financial Instruments, Not Separately Reported, Loans Receivable, for Federal Home Loan Bank Debt	$ 1,521,000	$ 1,566,000

Long-Term Debt Schedule of matu

Long-Term Debt Schedule of maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jun. 20, 2019
Debt Instrument [Line Items]
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	$ 0	$ 0
LongTermDebtMaturitiesAverageRateInNextTwelveMonths	0.00%	0.00%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	$ 32,500	$ 0
LongTermDebtMaturitiesAverageRateInYearTwo	1.84%	0.00%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	$ 0	$ 92,500
LongTermDebtMaturitiesAverageRateInYearThree	0.00%	3.19%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	$ 0	$ 100,000
LongTermDebtMaturitiesAverageRateInYearFour	0.00%	3.40%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	$ 0	$ 0
LongTermDebtMaturitiesAverageRateInYearFive	0.00%	0.00%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix		$ 0
LongTermDebtMaturitiesAverageRateInYearSix		0.00%
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 0
Long Term Debt Maturities Average Rate In After Year Five	0.00%
Long Term Debt Maturities Repayments Of Principal After Year Six		$ 0
Thereafter		0.00%
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs	$ 32,500	$ 192,500
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs, Average Rate	1.84%	3.30%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	$ 0	$ 0
LongTermDebtMaturitiesAverageRateInNextTwelveMonths	0.00%	0.00%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	$ 0	$ 0
LongTermDebtMaturitiesAverageRateInYearTwo	0.00%	0.00%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	$ 0	$ 50,000
LongTermDebtMaturitiesAverageRateInYearThree	0.00%	3.01%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	$ 0	$ 100,000
LongTermDebtMaturitiesAverageRateInYearFour	0.00%	3.40%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	$ 0	$ 0
LongTermDebtMaturitiesAverageRateInYearFive	0.00%	0.00%
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix		$ 0
LongTermDebtMaturitiesAverageRateInYearSix		0.00%
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 0
Long Term Debt Maturities Average Rate In After Year Five	0.00%
Long Term Debt Maturities Repayments Of Principal After Year Six		$ 0
Thereafter		0.00%
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs	$ 0	$ 150,000
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs, Average Rate	0.00%	3.27%
Notes Payable to Banks
Debt Instrument [Line Items]
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs	$ 32,500	$ 42,500	$ 50,000
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs, Average Rate	1.84%	3.40%

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 03, 2020	Feb. 18, 2020	Jun. 20, 2019
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 0		$ 0
Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank	14,000		14,000	$ 18,000
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs	32,500		32,500	192,500
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties	100,000	$ 50,000	10,529	612	$ 197
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate						3.40%	3.01%
Notes Payable to Banks
Debt Instrument [Line Items]
Long-term Debt, Excluding Unamortized Cost of Debt Extinguishment Costs	32,500		32,500	42,500				$ 50,000
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Pledged Financial Instruments, Not Separately Reported, Loans Receivable, for Federal Home Loan Bank Debt	$ 1,521,000		$ 1,521,000	$ 1,566,000

Subordinated Notes (Details)

Subordinated Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Aug. 20, 2020	Dec. 31, 2019
Subordinated Borrowing [Line Items]
Basis spread on variable rate (percent)	1.48%
Long-term Debt, Gross		$ 175,000
Debt Instrument, Interest Rate, Stated Percentage		4.50%
Long-term Debt	$ 32,500		$ 192,500
Debt Issuance Costs, Gross		$ 2,400
Subordinated debt
Subordinated Borrowing [Line Items]
Basis spread on variable rate (percent)	4.39%
Long-term Debt	$ 172,800
Trust I
Subordinated Borrowing [Line Items]
Preferred securities issued	15,000
Junior subordinated notes
Subordinated Borrowing [Line Items]
Junior subordinated debt purchased by Trust I	$ 15,500

Derivatives Schedule of derivat

Derivatives Schedule of derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 885	$ 575
Borrowing Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 25,000	$ 25,000
Derivative, Average Fixed Interest Rate	2.595%	2.595%
Derivative, Average Variable Interest Rate	0.218%	2.002%
Derivative, Average Remaining Maturity	1 year 6 months	2 years 6 months
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 885	$ 575
Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 33,310	$ 35,503
Derivative, Average Fixed Interest Rate	4.695%	4.695%
Derivative, Average Variable Interest Rate	4.695%	4.695%
Derivative, Average Remaining Maturity	9 years 3 months 18 days	10 years 2 months 12 days
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 0	$ 0

Derivatives included in AOCI (D

Derivatives included in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ (244)	$ (454)	$ 0
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	0	0	0
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	$ 0	$ 0	$ 0

Derivatives Statements of finan

Derivatives Statements of financial performance and financial position (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 885	$ 575
Borrowing Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	25,000	25,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	885	575
Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	33,310	35,503
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Assets [Member] | Borrowing Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Other Assets [Member] | Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	33,310	24,421
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(3,934)	(1,781)
Other Assets [Member] | Loan Derivative [Member] | Individually Immaterial Counterparties [Member]
Derivative [Line Items]
Derivative, Notional Amount	0	11,083
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	(89)
Other Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	33,310	35,504
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(3,934)	(1,870)
Other Liabilities [Member] | Borrowing Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	25,000	25,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	885	575
Other Liabilities [Member] | Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	0	11,083
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	89
Other Liabilities [Member] | Loan Derivative [Member] | Individually Immaterial Counterparties [Member]
Derivative [Line Items]
Derivative, Notional Amount	33,310	24,421
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	3,934	1,781
Other Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	58,310	60,504
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 4,819	$ 2,445

Derivatives (Details)

Derivatives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Interest Income on Interest-rate Swap	$ 423,000	$ 42,000	$ 0
Derivative Asset	1,545,000	221,000
Swap [Member]
Derivative [Line Items]
Derivative Asset		1,870,000
Swaps, fair value	226,000	226,000
Borrowing Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	25,000,000	25,000,000
Loan Derivative [Member]
Derivative [Line Items]
Derivative, Notional Amount	33,310,000	35,503,000
Interest Rate Lock Commitment [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 58,200,000	$ 15,900,000

Share Based Compensation Activi

Share Based Compensation Activity (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	194,722	152,631
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	44,379	27,719
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	3,101	1,262
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Period Increase (Decrease)	(5,399)	(3,368)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	204,108	194,722	152,631
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	36,674	27,719
2017 Employees Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	62,265	74,440
2017 Employees Long Term Incentive Plan [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	62,265	58,740	48,053

Share Based Compensation Nonves

Share Based Compensation Nonvested award cost (Details) $ in Thousands	Dec. 31, 2020USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 7,279
Expense to be paid next twelve months [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	3,676
Expense to be paid Year Two [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	2,439
Expense to be paid Year Three [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	1,004
Expense to be paid Year Four [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 160

Share Based Compensation (Detai

Share Based Compensation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock Reissued Shares For Director Grants	13,450	13,500	11,650
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	$ 1.3	$ 1.3	$ 1.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	186,331
Allocated Share-based Compensation Expense	$ 6	$ 5	$ 4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	44,379	27,719
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Paid for Tax Withholding for Share Based Compensation	2,392
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings	5,313
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	7,705
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Paid for Tax Withholding for Share Based Compensation	11,646	8,736
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings	25,028	18,983
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	36,674	27,719
2013 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares authorized for delivery upon the exercise of incentive stock options	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease)	18,695
2017 Employees Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	750,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	525,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	62,265	74,440
2017 Employees Long Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		15,700	13,637
2017 Employees Long Term Incentive Plan [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	62,265	58,740	48,053
2017 Non Employee Directors LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	150,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	100,250

Benefit Plan (Details)

Benefit Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 17, 2009
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 0	$ 0
Defined Benefit Plan, Benefit Obligation		$ 184,410,000	$ 154,419,000	$ 123,528,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.00%	3.53%	4.60%
Expected long-term rate of return on plan assets		7.00%
Accumulated benefit obligation for the pension plan		$ 149,500,000	$ 129,300,000
Common share purchased under pension plan, shares					115,800
Common share purchased under pension plan, value					$ 7,000,000
Common share purchased under pension plan, value per share					$ 60.45
Fair value of common shares held by pension plan		$ 12,200,000	$ 11,900,000
Fair value of common shares held by pension plan, per share		$ 105.01	$ 102.38
Fair value, pension plan common shares held, shares		115,800
Estimated net actuarial (loss) expected to be recognized in the next fiscal year		$ 2,200,000
Defined Benefit Plan, Plan Assets, Amount		230,442,000	$ 210,623,000	$ 177,077,000
Market value of pension plan assets		230,400,000	210,600,000
Defined Contribution Plan, Cost		4,200,000	3,900,000	3,000,000
Subsequent Event [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0
Level 1
Defined Benefit Plan Disclosure [Line Items]
Equity investments		195,000,000	180,000,000
Level 2
Defined Benefit Plan Disclosure [Line Items]
Equity investments		35,400,000	30,600,000
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity investments		0	0
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,500,000
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated prior service costs expected to be recognized in net periodic benefit cost during next fiscal year		(16,000)
Supplemental Executive Retirement Plan (SERP)
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost		12,300,000	11,000,000
Benefit expense		$ 2,100,000	$ 1,300,000	$ 1,000,000

Benefit Plan Schedule of plan a

Benefit Plan Schedule of plan assets and benefit obligation activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Defined Benefit Plan, Plan Assets, Amount	$ 230,442	$ 210,623	$ 177,077
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	27,800	42,402
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	7,981	8,856
Defined Benefit Plan, Benefit Obligation	184,410	154,419	123,528
Defined Benefit Plan, Service Cost	8,319	5,873	6,547
Defined Benefit Plan, Interest Cost	5,283	5,491	$ 5,236
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	(168)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	24,370	28,551
Benefits paid	7,981	8,856
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ 46,032	$ 56,204

Benefit Plan Schedule of alloca

Benefit Plan Schedule of allocation of plan assets (Details)	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	84.00%	81.00%
Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	16.00%	19.00%

Benefit Plan Schedule of assump

Benefit Plan Schedule of assumptions used to determine benefit obligations (Details)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.00%	3.53%	4.60%
Rate of compensation increase
Under age 30 [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	8.25%	10.00%	10.00%
Ages 30-39 [Member] [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	6.00%	6.00%	6.00%
Ages 40-49 [Domain]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	5.00%	4.00%	4.00%
Ages 50 to 54 [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	4.25%	3.00%	3.00%
Ages 55-59
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.75%	3.00%	3.00%
Ages 60-64
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.50%	3.00%	3.00%
Ages 65 and over
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.25%	3.00%	3.00%

Benefit Plan Schedule of estima

Benefit Plan Schedule of estimated future pension benefit payments (Details) $ in Thousands	Dec. 31, 2020USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months	$ 11,582
Defined Benefit Plan Expected Future Benefit Payments Year Two	11,798
Defined Benefit Plan Expected Future Benefit Payments Year Three	11,672
Defined Benefit Plan Expected Future Benefit Payments Year Four	12,613
Defined Benefit Plan Expected Future Benefit Payments Year Five	12,758
Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter	62,929
Defined Benefit Plan, Expected Future Benefit Payments, Total	$ 123,352

Benefit Plan Schedule of balanc

Benefit Plan Schedule of balances of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	$ 152	$ 168
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	43,723	33,933
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(43,571)	(33,765)
Deferred Tax Assets, Tax Deferred Expense, Other	9,150	7,091
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (34,421)	$ (26,674)

Benefit Plan Schedule of compon

Benefit Plan Schedule of components of net periodic benefit cost and other amounts recognized in OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Defined Benefit Plan, Service Cost	$ (8,319)	$ (5,873)	$ (6,547)
Defined Benefit Plan, Interest Cost	(5,283)	(5,491)	(5,236)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	14,410	12,105	13,417
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	(1,175)	(1,882)	(1,361)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	367	1,141	(273)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(10,981)	1,913	(5,122)
Defined Benefit Plan, Amortization of Gain (Loss)	1,175	1,882	1,361
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax	(9,806)	3,795	(3,761)
Total Recognized In Net Benefit Cost And Other Comprehensive Loss Income	$ (10,173)	$ 2,654	$ (3,488)

Benefit Plan Schedule of assu_2

Benefit Plan Schedule of assumptions used to determine costs (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.53%	4.60%	3.89%
Rate of compensation increase
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.00%	7.00%	7.00%
Under age 30 [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	8.25%	10.00%	10.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	10.00%	10.00%	10.00%
Ages 30-39 [Member] [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	6.00%	6.00%	6.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	6.00%	6.00%	6.00%
Ages 40-49 [Domain]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	5.00%	4.00%	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.00%	4.00%	4.00%
Ages 50 and Over
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.00%	3.00%	3.00%
Ages 50 to 54 [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	4.25%	3.00%	3.00%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,629	$ 4,094
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,629	$ 4,094
State and Local Income Tax Expense (Benefit), Continuing Operations	$ 1,100	$ 1,200
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
State and Local Jurisdiction [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	$ 500	$ 600
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	500	600
Domestic Tax Authority [Member]
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	3,100	3,500
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,100	$ 3,500

Income Taxes Schedule of deferr

Income Taxes Schedule of deferred income tax asset and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Components of Deferred Tax Assets [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 19,512	$ 12,120
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	9,150	7,091
Deferred Tax Assets, Hedging Transactions	186	121
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	3,887	3,131
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses	1,012	964
Deferred tax asset, deferred loan fees	3,283	1,451
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other	571	477
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	2,567	2,132
Deferred Tax Assets, Operating Loss Carryforwards	3,629	4,094
Deferred Tax Assets, Operating lease liability	3,561	3,097
Deferred Tax Assets, Other	1,424	843
Deferred Tax Assets, Gross	48,782	35,521
Components of Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Unrealized Gains on Trading Securities	10,507	4,662
Deferred Tax Liabilities, Property, Plant and Equipment	3,360	585
Deferred Tax Liabilities, Investments	6,637	6,231
Deferred Tax Liabilities, Prepaid Expenses	20,407	19,238
Deferred Tax Liabilities, Mortgage Servicing Rights	2,781	2,153
Deferred Tax Liabilities, Partnership Adjustments	204	178
Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost	604	49
Deferred Tax Liabilities, Operating lease right of use asset	3,343	2,932
Deferred Tax Liabilities, Leasing Arrangements	3,433	2,697
Deferred Tax Liabilities, Other	398	488
Deferred Tax Liabilities, Tax Deferred Income	51,674	39,213
Net deferred tax liability	$ 2,892	$ 3,692

Income Taxes Federal and State

Income Taxes Federal and State income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 22,769	$ 14,797	$ 12,700
Current State and Local Tax Expense (Benefit)	1,432	1,191	352
Other Tax Expense (Benefit)	7,046	6,927	7,322
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	(4,812)	(815)	481
Deferred State and Local Income Tax Expense (Benefit)	287	(29)	57
Income taxes	$ 26,722	$ 22,071	$ 20,912

Income Taxes Schedule of income

Income Taxes Schedule of income tax rate reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	1.50%	2.00%	1.80%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent	0.70%	0.80%	1.10%
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent	1.10%	1.50%	1.30%
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Percent	0.60%	0.60%	0.60%
Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent	0.00%	0.00%	(0.60%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	(0.20%)	(1.60%)	(0.30%)
Effective Income Tax Rate Reconciliation, Percent	17.30%	17.70%	15.90%

Income Taxes Reconciliation of

Income Taxes Reconciliation of unrecognized tax benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 954,000	$ 1,226,000	$ 664,000
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	12,000	12,000	10,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	0	2,000	781,000
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	0	3,000	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	333,000	283,000	229,000
Unrecognized Tax Benefits, Ending Balance	633,000	954,000	1,226,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	600,000	900,000	1,100,000
Income Tax Examination, Penalties and Interest Expense	(35,000)	(7,500)	(79,500)
Income Tax Examination, Penalties and Interest Accrued	$ 111,000	$ 146,000	$ 153,500

Other Comprehensive Income (Det

Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	$ 26,674	$ 34,421	$ 26,674	$ 29,672	$ 23,526
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax	17,539	40,690	17,539	(20,116)	(2,928)
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	(454)	(698)	(454)	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(9,589)	5,571	(9,589)	(49,788)	(26,454)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax		8,675	(1,511)	4,046
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax		25,747	37,322	(17,586)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax		(244)	(454)	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		16,828	38,379	(21,632)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax		928	1,487	1,075
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		2,596	(333)	(2,024)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		1,668	(1,820)	(3,099)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		7,747	(2,998)	2,971
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax		23,151	37,655	(15,562)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(244)	(454)
Other Comprehensive Income (Loss), Net of Tax		15,160	40,199	(18,533)
Debt Securities, Held-to-maturity, Transfer, Amount			373,900
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax	$ 24,200
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax		0	19,095	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		1,175	1,882	1,361
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		1,175	1,882	1,361
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax		247	395	286
Gain (Loss) on Sale of Investments		3,286	(421)	(2,271)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax		(3,286)	421	2,562
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		(690)	88	538
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax					(995)
Accumulated Other Comprehensive Income (Loss), Net of Tax					(995)
Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax					3,175
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax					(631)
Accumulated Other Comprehensive Income (Loss), Net of Tax					(3,806)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (Loss) on Sale of Investments		3,286	(421)	(2,562)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax				(2,024)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		$ (2,596)	$ 333	$ 2,024
Adjustments for New Accounting Pronouncement [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax					23,526
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax					(3,923)
Accumulated Other Comprehensive Income (Loss), Net of Tax					$ (27,449)

Earnings Per Share Summary of C

Earnings Per Share Summary of Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic									$ 127,923	$ 102,700	$ 110,387
Weighted Average Number of Shares Outstanding, Basic	16,310,551,000	16,300,720,000	16,296,427,000	16,303,602,000	16,342,485,000	16,382,798,000	16,560,545,000	15,651,541,000	16,302,825	16,234,342	15,488,982
Weighted Average Number Diluted Shares Outstanding Adjustment									104,677	95,114	122,507
Weighted Average Number of Shares Outstanding, Diluted	16,434,812,000	16,393,792,000	16,375,434,000	16,425,881,000	16,454,553,000	16,475,741,000	16,642,571,000	15,744,777,000	16,407,502	16,329,456	15,611,489
Basic (in dollars per share)	$ 2.77	$ 1.89	$ 1.81	$ 1.37	$ 1.46	$ 1.90	$ 1.34	$ 1.63	$ 7.85	$ 6.33	$ 7.13
Diluted (in dollars per share)	$ 2.75	$ 1.88	$ 1.80	$ 1.36	$ 1.45	$ 1.89	$ 1.33	$ 1.62	$ 7.80	$ 6.29	$ 7.07

Earnings Per Share (Details)

Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Stock Issued During Period, Shares, Acquisitions		1,037,205	435,457
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Stock Issued During Period, Shares, Acquisitions		1,037,205	435,457
Treasury Stock, Shares, Acquired	76,000	421,253	50,000
Common Stock [Member] | share repurchase program [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Treasury Stock, Shares, Acquired		334,603
2017 Employees Long Term Incentive Plan [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	62,265	74,440
2017 Employees Long Term Incentive Plan [Member] | Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Treasury Stock, Shares, Acquired	76,000	86,650	50,000
2017 Employees Long Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		15,700	13,637
2017 Employees Long Term Incentive Plan [Member] | Performance Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	62,265	58,740	48,053

Dividend Restrictions (Details)

Dividend Restrictions (Details) $ in Millions	Dec. 31, 2020USD ($)
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval	$ 101.8

Financial Instruments With Of_3

Financial Instruments With Off-Balance Sheet Risk and Financial Instruments With Concentrations of Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Unused Commitments to Extend Credit	$ 1,372,182	$ 1,309,896
Letters of Credit Outstanding, Amount	$ 17,015	$ 17,195

Loan Servicing (Details)

Loan Servicing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Assets at Fair Value [Line Items]
Serviced sold mortgage loans	$ 1,972,000	$ 1,447,000	$ 1,389,000
Serviced sold mortgage loans with recourse	1,700	2,300	2,500
Mortgage loans sold with recourse, reserve	$ 30	$ 25
Mortgage servicing rights, discount rate	12.00%	12.00%
Bank Servicing [Member]
Servicing Assets at Fair Value [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 37,611	$ 15,500	14,266
Bank Servicing [Member] | Real Estate Loan [Member]
Servicing Assets at Fair Value [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 4,100	$ 3,600	$ 3,600
Minimum
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, constant prepayment speeds	13.20%	6.60%
Maximum
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, constant prepayment speeds	27.54%	18.42%
Mortgages [Member]
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Amortized Cost, Fair Value	$ 12,200	$ 10,100

Loan Servicing Activity of MSRs

Loan Servicing Activity of MSRs and the related valuation allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Servicing Asset at Amortized Cost, Beginning Balance	$ 10,070	$ 10,178	$ 9,688
Servicing Asset at Amortized Cost, Additions	8,627	2,355	1,591
Servicing Asset at Amortized Cost, Amortization	4,123	1,870	1,499
Servicing Asset at Amortized Cost, Increase (Decrease) for Valuation Allowance Adjustment	(2,364)	(593)	398
Servicing Asset at Amortized Cost, Ending Balance	12,210	10,070	10,178
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance, Beginning Balance	825	232	630
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries)	2,364	593	(398)
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance, Ending Balance	$ 3,189	$ 825	$ 232

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 15,078	$ 13,714
Operating Lease, Liability	16,053	14,482
Deferred Rent Credit			$ 600
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (1,040,256)	$ (969,014)
Operating Lease, Weighted Average Remaining Lease Term	7 years 2 months 12 days	7 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	2.30%	3.10%
Retained Earnings
Lessee, Lease, Description [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (704,764)	$ (646,847)	(614,069)	$ (561,908)
Accounting Standards Update 2016-02 [Member] | Retained Earnings
Lessee, Lease, Description [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			143
Other Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Liability	16,053	14,500	11,800
Other Assets [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 15,100	$ 13,700	$ 11,000

Leases, Lease Cost (Details)

Leases, Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Cost	$ 3,463	$ 3,165
Sublease Income	352	383
Lease, Cost, Total	3,111	2,782
Operating Lease, Payments	3,553	3,192
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	7,821	505
reductions to right of use assets resulting from reduction in lease obligations	$ 3,084	$ 2,855

Leases, Operating lease liabili

Leases, Operating lease liabilities payments due (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 3,062
Lessee, Operating Lease, Liability, Payments, Due Year Two	2,955
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,840
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,755
Lessee, Operating Lease, Liability, Payments, Due Year Five	1,415
Lessee, Operating Lease, Liability, Payments, Due after Year Five	5,404
Lessee, Operating Lease, Liability, Payments, Due	17,431
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	1,378
Operating Lease, Liability	16,053	$ 14,482
Other Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Liability	$ 16,053	$ 14,500	$ 11,800

Fair Value (Details)

Fair Value (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Repossessed Assets	$ 3,600,000	$ 4,200,000
Discount percentage applied to real estate appraised values	15.00%
Discount percentage applied to lot development appraised values	6.00%
Mortgage loan servicing rights	$ 12,210,000	10,070,000	$ 10,178,000	$ 9,688,000
Servicing Asset at Fair Value, Amount	12,200,000	5,800,000
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance	3,189,000	825,000	232,000	$ 630,000
MSRs recorded at cost	31,000	4,300,000
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries)	2,364,000	593,000	(398,000)
Other real estate owned	$ 1,431,000	$ 4,029,000
Percent of OREO held at fair value	51.00%	75.00%
Estimated fair value of other real estate owned (OREO)	$ 735,000	$ 3,000,000
OREO devaluations	100,000	(200,000)	(500,000)
expense related to other repossessed assets	435,000		269,000
Alternative Investment	21,522,000	20,411,000
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	6,200,000	8,500,000
Alternative Investment, income recognized	2,400,000	4,800,000	$ 1,400,000
Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Repossessed Assets	3,164,000	3,599,000
Servicing Asset at Fair Value, Amount	12,179,000	5,797,000
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Repossessed Assets	3,164,000	3,599,000
Fair Value Measured at Net Asset Value Per Share [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Alternative Investment	$ 15,400,000	$ 11,900,000

Fair Value Schedule of Financia

Fair Value Schedule of Financial Assets and Liabilities measured on recurring basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 31,666,000	$ 12,278,000
Derivative Asset	1,545,000	221,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	885,000	575,000
Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swaps, fair value	3,934,000	1,870,000
Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		1,870,000
Swaps, fair value	226,000	226,000
Recurring basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	31,666,000	12,278,000
Derivative Asset	1,545,000	221,000
Recurring basis | Obligations of States and Political Subdivisions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	305,218,000	320,491,000
Recurring basis | U S Government Sponsored Entities Asset Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	752,109,000	889,210,000
Recurring basis | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	2,511,000	1,993,000
Recurring basis | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	3,934,000	1,870,000
Swaps, fair value	3,934,000	1,870,000
Recurring basis | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swaps, fair value	226,000	226,000
Recurring basis | Corporate Debt Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	2,014,000
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Level 1 | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0
Level 1 | Recurring basis | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	2,026,000	1,537,000
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	31,666,000	12,278,000
Derivative Asset	1,545,000	221,000
Level 2 | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	3,934,000
Swaps, fair value	3,934,000	1,870,000
Level 2 | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		1,870,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	885,000	575,000
Level 2 | Recurring basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	31,666,000	12,278,000
Derivative Asset	1,545,000	221,000
Level 2 | Recurring basis | Obligations of States and Political Subdivisions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	305,218,000	320,491,000
Level 2 | Recurring basis | U S Government Sponsored Entities Asset Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	752,109,000	889,210,000
Level 2 | Recurring basis | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	3,934,000	1,870,000
Swaps, fair value	3,934,000	1,870,000
Level 2 | Recurring basis | Corporate Debt Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	2,014,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Fair Value, Inputs, Level 3 [Member] | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0
Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swaps, fair value	226,000	226,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Fair Value, Inputs, Level 3 [Member] | Recurring basis | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	485,000	456,000
Fair Value, Inputs, Level 3 [Member] | Recurring basis | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swaps, fair value	$ 226,000	$ 226,000

Fair Value Reconciliation of Le

Fair Value Reconciliation of Level 3 Input for Financial Instruments measured on recurring basis (Details) - Fair Value, Inputs, Level 3 [Member] - Recurring basis - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 485	$ 456	$ 424
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	29	32
Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	(226)	(226)	$ (226)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	$ 0	$ 0

Fair Value Assets and Liabiliti

Fair Value Assets and Liabilities measured on nonrecurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans carried at fair value	$ 6,924	$ 2,090
Loans Receivable, Fair Value Disclosure	7,112,474	6,441,458
Servicing Asset at Fair Value, Amount	12,200	5,800
Other Assets, Fair Value Disclosure	7,072,339	6,426,869
Other Repossessed Assets	3,600	4,200
Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,924	2,090
Servicing Asset at Fair Value, Amount	12,179	5,797
Other Assets, Fair Value Disclosure	735	3,033
Other Repossessed Assets	3,164	3,599
Nonrecurring basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	175	217
Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,749	1,873
Nonrecurring basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	735	738
Nonrecurring basis | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	2,295
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0	0
Level 1 | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Level 1 | Nonrecurring basis | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Repossessed Assets	0
Level 1 | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Level 1 | Nonrecurring basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	33,211	12,499
Level 2 | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset at Fair Value, Amount	12,179	5,797
Other Assets, Fair Value Disclosure	0	0
Level 2 | Nonrecurring basis | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Repossessed Assets	0
Level 2 | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Level 2 | Nonrecurring basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans carried at fair value	6,924	2,090
Loans Receivable, Fair Value Disclosure	7,079,263	6,428,959
Other Assets, Fair Value Disclosure	7,072,339	6,426,869
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,924	2,090
Other Assets, Fair Value Disclosure	735	3,033
Other Repossessed Assets	3,164	3,599
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	175	217
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,749	1,873
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis | Residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	735	738
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis | Commercial Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	$ 0	$ 2,295

Fair Value Impaired financing r

Fair Value Impaired financing receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Book Value Of Impaired Loans Carried At Fair Value	$ 8,256	$ 2,167
Partial Charge-Offs On Impaired Loans carried at Fair Value	269	313
Impaired Financing Receivable, Related Allowance	5,434	5,230
Impaired loans carried at fair value	6,924	2,090
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment	100,199	75,324
Partial Charge-offs on Impaired Loans carried at Cost	386	406
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount	96,097	70,171
Impaired Financing Receivable, Recorded Investment	108,455	77,491	$ 48,144
Partial charge-offs on impaired loans	655	719
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5,434	5,230
Impaired Financing Receivable, Carrying Value	103,021	72,261
Impaired Financing Receivable, carried at fair value, related expense	4,700	200	$ 400
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	1,332	77
Financing Receivable, not collateral dependent [Domain]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	$ 4,102	$ 5,153

Fair Value Schedule of qualitat

Fair Value Schedule of qualitative information on Level 3 measurements (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	$ 6,924	$ 2,090
Other Assets, Fair Value Disclosure	7,072,339	6,426,869
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	6,924	2,090
Other Assets, Fair Value Disclosure	7,072,339	6,426,869
Nonrecurring basis
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	735	3,033
Nonrecurring basis | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	735	3,033
Nonrecurring basis | Residential real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	735	738
Nonrecurring basis | Residential real estate | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	735	738
Nonrecurring basis | Commercial Real Estate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	0	2,295
Nonrecurring basis | Commercial Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	$ 0	$ 2,295
Loans | Commercial Real Estate Portfolio Segment [Member] | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0	0
Loans | Commercial Real Estate Portfolio Segment [Member] | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.093
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	1.390	0.560
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.026	0.931
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.200
Loans | Commercial Real Estate Portfolio Segment [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | MeasurementInputComparabilityAdjustmentMember | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.100
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.118	0.265
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.026	0.931
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.103
Loans | Commercial Real Estate Portfolio Segment [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | MeasurementInputComparabilityAdjustmentMember | Valuation, Cost Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.100
Loans | Residential real estate | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.020	0
Loans | Residential real estate | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.478	0.535
Loans | Residential real estate | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans Receivable, Measurement Input	0.119	0.108
Loans | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	$ 6,749	$ 1,873
Loans | Nonrecurring basis | Residential real estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans carried at fair value	$ 175	$ 217
Other real estate owned | Residential real estate | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.078	0.046
Other real estate owned | Residential real estate | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.099	0.546
Other real estate owned | Residential real estate | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input	0.089	0.392
Other real estate owned | Commercial Real Estate [Member] | Minimum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input		0.009
Other real estate owned | Commercial Real Estate [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input		0.684
Other real estate owned | Commercial Real Estate [Member] | Maximum | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input		0.130
Other real estate owned | Commercial Real Estate [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input		0.347
Other real estate owned | Commercial Real Estate [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Real Estate Owned, Measurement Input		0.130
Other real estate owned | Nonrecurring basis | Other Real Estate Owned, Commercial [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure		$ 2,295
Other real estate owned | Nonrecurring basis | Other Real Estate Owned, Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other Assets, Fair Value Disclosure	$ 735	$ 738

Fair Value by Balance Sheet gro

Fair Value by Balance Sheet grouping (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 370,474,000	$ 159,956,000
Investment Owned, at Fair Value	1,059,341,000	1,209,701,000
Mortgages Held-for-sale, Fair Value Disclosure	31,666,000	12,278,000
Derivative Asset	1,545,000	221,000
Impaired loans carried at fair value	6,924,000	2,090,000
Other Assets, Fair Value Disclosure	7,072,339,000	6,426,869,000
Loans Receivable, Fair Value Disclosure	7,112,474,000	6,441,458,000
Time Deposits, Fair Value	870,804,000	1,145,537,000
Other Liabilities, Fair Value Disclosure	1,379,000	1,273,000
Deposits, Fair Value Disclosure	872,183,000	1,146,810,000
Short-term Debt, Fair Value	342,230,000	230,657,000
Long-term Debt, Fair Value	31,376,000	200,726,000
Subordinated Debt Obligations, Fair Value Disclosure	179,147,000	14,372,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	885,000	575,000
Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Owned, at Fair Value	2,511,000	1,993,000
Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swaps, fair value	3,934,000	1,870,000
Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		1,870,000
Swaps, fair value	226,000	226,000
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	370,474,000	159,956,000
Derivative Asset	0	0
Loans Receivable, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	1,379,000	1,273,000
Deposits, Fair Value Disclosure	1,379,000	1,273,000
Level 1 | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Owned, at Fair Value	2,026,000	1,537,000
Level 1 | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Owned, at Fair Value	1,059,341,000	1,209,701,000
Mortgages Held-for-sale, Fair Value Disclosure	31,666,000	12,278,000
Derivative Asset	1,545,000	221,000
Loans Receivable, Fair Value Disclosure	33,211,000	12,499,000
Time Deposits, Fair Value	870,804,000	1,145,537,000
Deposits, Fair Value Disclosure	870,804,000	1,145,537,000
Short-term Debt, Fair Value	342,230,000	230,657,000
Long-term Debt, Fair Value	31,376,000	200,726,000
Subordinated Debt Obligations, Fair Value Disclosure	179,147,000	14,372,000
Level 2 | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	3,934,000
Swaps, fair value	3,934,000	1,870,000
Level 2 | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		1,870,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	885,000	575,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Impaired loans carried at fair value	6,924,000	2,090,000
Other Assets, Fair Value Disclosure	7,072,339,000	6,426,869,000
Loans Receivable, Fair Value Disclosure	7,079,263,000	6,428,959,000
Deposits, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Owned, at Fair Value	485,000	456,000
Fair Value, Inputs, Level 3 [Member] | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0
Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swaps, fair value	226,000	226,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0	0
Estimate of Fair Value Measurement [Member] | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	3,934,000
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	370,474,000	159,956,000
Investment Owned, at Fair Value	1,059,341,000	1,209,701,000
Mortgages Held-for-sale, Fair Value Disclosure	31,666,000	12,278,000
Derivative Asset	1,545,000	221,000
Impaired loans carried at fair value	6,924,000	2,090,000
Other Assets, Fair Value Disclosure	7,051,975,000	6,430,136,000
Loans Receivable, Fair Value Disclosure	7,092,110,000	6,444,725,000
Time Deposits, Fair Value	864,573,000	1,139,131,000
Other Liabilities, Fair Value Disclosure	1,379,000	1,273,000
Deposits, Fair Value Disclosure	865,952,000	1,140,404,000
Short-term Debt, Fair Value	342,230,000	230,657,000
Long-term Debt, Fair Value	32,500,000	192,500,000
Subordinated Debt Obligations, Fair Value Disclosure	187,774,000	15,000,000
Reported Value Measurement [Member] | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment Owned, at Fair Value	2,511,000	1,993,000
Reported Value Measurement [Member] | Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	3,934,000
Swaps, fair value	3,934,000	1,870,000
Reported Value Measurement [Member] | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		1,870,000
Swaps, fair value	$ 226,000	$ 226,000

Capital Ratios (Details)

Capital Ratios (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Conservation Buffer	2.50%
Park National Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Leverage Capital to Average Assets	0.0859	0.0862
Tier One Risk Based Capital to Risk Weighted Assets	0.1066	0.1105
Common Equity Tier 1	0.1066	0.1105
Capital to Risk Weighted Assets	0.1216	0.1225
Leverage Capital Required For Capital Adequacy To Average Total Assets	0.0400	0.0400
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0600	0.0600
Common Equity Tier 1 Capital Required For Capital Adequacy To Average Total Assets	4.50%	4.50%
Capital Required for Capital Adequacy to Risk Weighted Assets	0.0800	0.0800
Leverage Capital Required To Be Well Capitalized To Average Total Assets	0.0500	0.0500
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0800	0.0800
Common Equity Tier 1 Capital Required To Be Well Capitalized To Average Total Assets	6.50%	6.50%
Capital Required to be Well Capitalized to Risk Weighted Assets	0.1000	0.1000
Risk Based Capital	$ 891,585	$ 810,880
Capital Required for Capital Adequacy	586,764	529,480
Capital Required to be Well Capitalized	733,455	661,850
Tier One Risk Based Capital	782,148	731,071
Tier One Risk Based Capital Required for Capital Adequacy	440,073	397,110
Tier One Risk Based Capital Required to be Well Capitalized	586,764	529,480
Tier One Leverage Capital	782,148	731,071
Tier One Leverage Capital Required for Capital Adequacy	364,079	339,092
Tier One Leverage Capital Required to be Well Capitalized	455,098	423,866
Common Equity Tier One Capital	782,148	731,071
Common Equity Tier One Capital Required for Capital Adequacy	330,055	297,832
Common Equity Tier One Capital Required to be Well-Capitalized	$ 476,746	$ 430,202
Park
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Leverage Capital to Average Assets	0.0963	0.0964
Tier One Risk Based Capital to Risk Weighted Assets	0.1192	0.1233
Common Equity Tier 1	0.1172	0.1211
Capital to Risk Weighted Assets	0.1543	0.1319
Leverage Capital Required For Capital Adequacy To Average Total Assets	0.0400	0.0400
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	0.0600	0.0600
Common Equity Tier 1 Capital Required For Capital Adequacy To Average Total Assets	4.50%	4.50%
Capital Required for Capital Adequacy to Risk Weighted Assets	0.0800	0.0800
Leverage Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	4.00%	4.00%
Tier One Risk Based Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	8.50%	8.50%
Common Equity Tier 1 Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	7.00%	7.00%
Capital Required For Capital Adequacy plus capital conservation buffer To Average Total Assets	10.50%	10.50%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	0.0600	0.0600
Capital Required to be Well Capitalized to Risk Weighted Assets	0.1000	0.1000
Risk Based Capital	$ 1,137,305	$ 877,108
Capital Required for Capital Adequacy	589,619	532,169
Capital Required to be Well Capitalized	737,023	665,211
Tier One Risk Based Capital	878,740	820,312
Tier One Risk Based Capital Required for Capital Adequacy	442,214	399,127
Tier One Risk Based Capital Required to be Well Capitalized	442,214	399,127
Tier One Leverage Capital	878,740	820,312
Tier One Leverage Capital Required for Capital Adequacy	365,143	340,412
Common Equity Tier One Capital	863,740	805,312
Common Equity Tier One Capital Required for Capital Adequacy	$ 331,661	$ 299,345

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Interest Income (Expense), Net	$ 86,321	$ 83,840	$ 81,186	$ 76,283	$ 77,009	$ 77,101	$ 75,851	$ 67,776	$ 327,630	$ 297,737	$ 266,898
Provision for loan losses	(19,159)	13,836	12,224	5,153	(213)	1,967	1,919	2,498	12,054	6,171	7,945
Other Income (Loss) and Security Gains									125,664	97,193	101,101
Noninterest Expense									286,595	263,988	228,755
Income before income taxes	55,475	36,703	35,127	27,340	30,215	37,532	26,548	30,476	154,645	124,771	131,299
Income taxes									26,722	22,071	20,912
Net Income (Loss) Attributable to Parent	45,200	$ 30,846	$ 29,505	$ 22,372	23,936	$ 31,146	$ 22,163	$ 25,455	127,923	102,700	110,387
Assets	9,279,021				8,558,377				9,279,021	8,558,377	7,804,308
Total loans	7,177,785				6,501,404				7,177,785	6,501,404	5,692,132
Total deposits	7,572,358				7,052,612				7,572,358	7,052,612	6,260,860
Depreciation, Amortization and Accretion, Net									10,814	9,112	8,585
Other Noninterest Expense									275,781	254,876	220,170
Totals For Reportable Segments [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net									330,160	298,143	263,595
Income taxes									27,428	26,322	23,785
Assets	9,249,346				8,549,130				9,249,346	8,549,130	7,785,236
Total deposits	7,823,256				7,129,030				7,823,256	7,129,030	6,338,938
Depreciation, Amortization and Accretion, Net									10,814	9,112	8,585
Other Noninterest Expense									260,526	231,799	201,503
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net									1,250	1,250	1,275
Income taxes									0	0	0
Assets	(1,458)				(19,231)				(1,458)	(19,231)	(13,482)
Total deposits	(250,898)				(76,418)				(250,898)	(76,418)	(78,078)
Depreciation, Amortization and Accretion, Net									0	0	0
Other Noninterest Expense									0	0	0
Parent Co Gfsc Totals Not Eliminated [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net									(3,780)	(1,656)	2,028
Income taxes									(706)	(4,251)	(2,873)
Assets	31,133				28,478				31,133	28,478	32,554
Total deposits	0				0				0	0	0
Depreciation, Amortization and Accretion, Net									0	0	0
Other Noninterest Expense									15,255	23,077	18,667
Pnb Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net									326,375	293,130	258,547
Provision for loan losses									30,813	8,356	7,569
Other Income (Loss) and Security Gains									124,231	92,392	88,981
Noninterest Expense									268,938	237,433	206,843
Income before income taxes									150,855	139,733	133,116
Income taxes									27,125	26,133	23,644
Net Income (Loss) Attributable to Parent									123,730	113,600	109,472
Assets	9,236,915				8,521,537				9,236,915	8,521,537	7,753,848
Total loans	7,165,840				6,481,644				7,165,840	6,481,644	5,671,173
Total deposits	7,820,983				7,125,111				7,820,983	7,125,111	6,334,796
GFSC [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net									3,785	5,013	5,048
Provision for loan losses									196	754	1,328
Other Income (Loss) and Security Gains									255	170	187
Noninterest Expense									2,402	3,478	3,245
Income before income taxes									1,442	951	662
Income taxes									303	189	141
Net Income (Loss) Attributable to Parent									1,139	762	521
Assets	12,431				27,593				12,431	27,593	31,388
Total loans	12,757				28,143				12,757	28,143	32,664
Total deposits	2,273				3,919				2,273	3,919	4,142
Other Segments [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net									(2,530)	(406)	3,303
Provision for loan losses									(18,955)	(2,939)	(952)
Other Income (Loss) and Security Gains									1,178	4,631	11,933
Noninterest Expense									15,255	23,077	18,667
Income before income taxes									2,348	(15,913)	(2,479)
Income taxes									(706)	(4,251)	(2,873)
Net Income (Loss) Attributable to Parent									3,054	(11,662)	394
Assets	29,675				9,247				29,675	9,247	19,072
Total loans	(812)				(8,383)				(812)	(8,383)	(11,705)
Total deposits	$ (250,898)				$ (76,418)				$ (250,898)	$ (76,418)	$ (78,078)

Parent Company Statements (Deta

Parent Company Statements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Parent Company
Income Taxes Paid, Net	$ 6.8	$ 4.1	$ 3.9

Parent Company Balance Sheet (D

Parent Company Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Assets	$ 691,631	$ 674,189
Assets	9,279,021	8,558,377	$ 7,804,308
Long-term Debt	32,500	192,500
Subordinated Debt	187,774	15,000
Other Liabilities	103,903	98,594
Total liabilities	8,238,765	7,589,363
Total liabilities and shareholders’ equity	9,279,021	8,558,377
Parent Company
Cash	248,814	73,663	$ 75,094	$ 79,452
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	969,054	912,162
Debentures Receivable From Subsidiary Banks	25,000	25,000
Due from Other Related Parties, Current	1,823	9,168
Other Investments	5,375	5,001
Other Assets	23,333	20,620
Assets	1,273,399	1,045,614
Long-term Debt	32,500	42,500
Subordinated Debt	187,774	15,000
Accounts Payable, Related Parties	132	10,092
Other Liabilities	12,737	9,008
Total liabilities	233,143	76,600
Stockholders' Equity Attributable to Parent	1,040,256	969,014
Total liabilities and shareholders’ equity	$ 1,273,399	$ 1,045,614

Parent Company Statements of In

Parent Company Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest and Dividend Income, Operating	$ 91,800	$ 89,566	$ 87,445	$ 88,909	$ 91,829	$ 94,589	$ 92,226	$ 81,856	$ 357,720	$ 360,500	$ 310,801
Interest Expense	5,479	5,726	6,259	12,626	14,820	17,488	16,375	14,080	30,090	62,763	43,903
Income taxes									26,722	22,071	20,912
Net Income (Loss) Attributable to Parent	$ 45,200	$ 30,846	$ 29,505	$ 22,372	$ 23,936	$ 31,146	$ 22,163	$ 25,455	127,923	102,700	110,387
Other Comprehensive Income (Loss), Net of Tax									15,160	40,199	(18,533)
Parent Company
Dividends From Subsidiaries									97,000	97,500	100,000
Interest and Dividend Income, Operating									1,250	1,250	1,275
Other Income									98	4,634	6,068
Revenues									98,348	103,384	107,343
Interest Expense									4,311	1,950	617
Other Expenses									12,234	19,804	14,619
Operating Expenses									16,545	21,754	15,236
Income Before Taxes And Equity In Undistributed Losses Of Subsidiaries									81,803	81,630	92,107
Income taxes									(4,390)	(4,242)	(4,010)
Income Before Equity In Undistributed Losses Of Subsidiaries									86,193	85,872	96,117
Equity In Undistributed Losses Of Subsidiaries									(41,730)	(16,828)	(14,270)
Net Income (Loss) Attributable to Parent									127,923	102,700	110,387
Other Comprehensive Income (Loss), Net of Tax									15,160	40,199	(18,533)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									$ 143,083	$ 142,899	$ 91,854

Parent Company Statement of Cas

Parent Company Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Income (Loss) Attributable to Parent	$ 45,200	$ 30,846	$ 29,505	$ 22,372	$ 23,936	$ 31,146	$ 22,163	$ 25,455	$ 127,923	$ 102,700	$ 110,387
Share-based Payment Arrangement, Noncash Expense									7,272	6,324	5,063
Debt and Equity Securities, Unrealized Gain (Loss)									245	(4,204)	(3,267)
Increase (Decrease) in Other Operating Assets									(9,216)	(12,530)	(9,904)
Increase (Decrease) in Other Operating Liabilities									(6,302)	(3,781)	5,131
Net cash provided by operating activities									111,646	111,626	131,994
Payments to Acquire Businesses, Gross									0	(28,630)	(30,684)
Other investing activities, net									(2,621)	5,723	60
Net cash used in investing activities									(455,902)	60,079	45,445
Proceeds from Issuance of Long-term Debt									0	50,000	50,000
Repayments of Long-term Debt									170,529		150,197
Payments Related to Tax Withholding for Share-based Compensation									1,002	827	610
Net cash (used in) provided by financing activities									554,774	(178,963)	(179,337)
Increase (decrease) in cash and cash equivalents									210,518	(7,258)	(1,898)
Treasury Stock, Common [Member]
Payments for Repurchase of Equity									7,507	40,535	5,784
Parent Company
Net Income (Loss) Attributable to Parent									127,923	102,700	110,387
Undistributed Losses Of Subsidiaries									41,730	16,828	14,270
Compensation expense for issuance of treasury shares to directors									1,274	1,325	1,109
Share-based Payment Arrangement, Noncash Expense									5,998	4,999	3,954
Increase (Decrease) in Other Operating Assets									(6,632)	8,544	2,073
Increase (Decrease) in Other Operating Liabilities									(6,325)	10,006	(163)
Net cash provided by operating activities									94,017	89,454	95,677
Net cash used in investing activities									(2,621)	(22,907)	(30,624)
Payments of Dividends									70,353	69,113	63,013
Proceeds from Issuance of Long-term Debt									172,620	50,000	0
Repayments of Long-term Debt									(10,000)	(7,500)	0
Cash Payment For Fractional Shares									3	3	4
Payments Related to Tax Withholding for Share-based Compensation									(1,002)	(827)	(610)
Net cash (used in) provided by financing activities									83,755	(67,978)	(69,411)
Increase (decrease) in cash and cash equivalents									175,151	(1,431)	(4,358)
Cash	$ 248,814				$ 73,663				$ 248,814	$ 73,663	$ 75,094	$ 79,452

Revenue from Contract with Cu_3

Revenue from Contract with Customer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Personal trust and agency accounts income	$ 8,761	$ 9,001	$ 8,495
Employee benefit and retirement-related accounts income	7,921	7,178	6,863
Investment management and investment advisory agency accounts income	10,652	10,024	9,352
Other income from fiduciary activities	1,539	1,565	1,583
Non-sufficient funds (NSF) fees	4,999	7,073	7,483
Demand deposit account (DDA) charges	2,920	3,105	3,310
Other service charges on deposit accounts	526	657	668
Credit card other service income	2,112	2,361	2,239
HELOC other service income	424	407	471
Installment other service income	165	173	243
Real estate other service income	32,889	11,158	9,079
Commercial other service income	2,021	1,401	2,234
Debit card fee income	22,160	20,250	17,317
Bank Owned Life Insurance Income	4,789	4,557	6,815
ATM Fees	1,773	1,828	1,978
Gains (Losses) on Sales of Other Real Estate	1,207	(222)	4,235
Debt and Equity Securities, Gain (Loss)	3,286	(421)	(2,271)
Gain on equity securities, net	2,182	5,118	4,616
Other components of net periodic benefit income	7,952	4,732	6,820
Gain (Loss) on Sales of Loans, Net	0	0	2,826
Noninterest Income, Other	7,386	7,248	6,745
Noninterest Income	125,664	97,193	101,101
Bank Servicing [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income, Other	37,600	15,500	14,300
Within Scope [Domain]
Disaggregation of Revenue [Line Items]
Noninterest Income, Other	5,200	4,900	5,500
Out of Scope [Domain]
Disaggregation of Revenue [Line Items]
Noninterest Income, Other	32,400	10,600	8,800
Pnb Segment [Member]
Disaggregation of Revenue [Line Items]
Personal trust and agency accounts income	8,761	9,001	8,495
Employee benefit and retirement-related accounts income	7,921	7,178	6,863
Investment management and investment advisory agency accounts income	10,652	10,024	9,352
Other income from fiduciary activities	1,539	1,565	1,583
Non-sufficient funds (NSF) fees	4,999	7,073	7,483
Demand deposit account (DDA) charges	2,920	3,105	3,310
Other service charges on deposit accounts	526	657	668
Credit card other service income	2,108	2,354	2,212
HELOC other service income	424	403	471
Installment other service income	165	256	243
Real estate other service income	32,827	11,167	9,079
Commercial other service income	1,493	1,259	1,153
Debit card fee income	22,160	20,250	17,317
Bank Owned Life Insurance Income	4,521	4,168	4,903
ATM Fees	1,773	1,828	1,978
Gains (Losses) on Sales of Other Real Estate	836	(110)	1,440
Debt and Equity Securities, Gain (Loss)	3,286	(421)	(2,271)
Gain on equity securities, net	2,429	913	549
Other components of net periodic benefit income	7,759	4,587	6,609
Gain (Loss) on Sales of Loans, Net			660
Noninterest Income, Other	7,132	7,135	6,884
Noninterest Income	124,231	92,392	88,981
GFSC [Member]
Disaggregation of Revenue [Line Items]
Personal trust and agency accounts income	0	0	0
Employee benefit and retirement-related accounts income	0	0	0
Investment management and investment advisory agency accounts income	0	0	0
Other income from fiduciary activities	0	0	0
Non-sufficient funds (NSF) fees	0	0	0
Demand deposit account (DDA) charges	0	0	0
Other service charges on deposit accounts	0	0	0
Credit card other service income	4	7	27
HELOC other service income	0	0	0
Installment other service income	0	0	0
Real estate other service income	0	0	0
Commercial other service income	0	0	0
Debit card fee income	0	0	0
Bank Owned Life Insurance Income	0	0	0
ATM Fees	0	0	0
Gains (Losses) on Sales of Other Real Estate	0	0	0
Debt and Equity Securities, Gain (Loss)	0	0	0
Gain on equity securities, net	0	0	0
Other components of net periodic benefit income	94	54	75
Gain (Loss) on Sales of Loans, Net			0
Noninterest Income, Other	157	109	85
Noninterest Income	255	170	187
Other Segments [Member]
Disaggregation of Revenue [Line Items]
Personal trust and agency accounts income	0	0	0
Employee benefit and retirement-related accounts income	0	0	0
Investment management and investment advisory agency accounts income	0	0	0
Other income from fiduciary activities	0	0	0
Non-sufficient funds (NSF) fees	0	0	0
Demand deposit account (DDA) charges	0	0	0
Other service charges on deposit accounts	0	0	0
Credit card other service income	0	0	0
HELOC other service income	0	4	0
Installment other service income	0	(83)	0
Real estate other service income	62	(9)	0
Commercial other service income	528	142	1,081
Debit card fee income	0	0	0
Bank Owned Life Insurance Income	268	389	1,912
ATM Fees	0	0	0
Gains (Losses) on Sales of Other Real Estate	371	(112)	2,795
Debt and Equity Securities, Gain (Loss)	0	0	0
Gain on equity securities, net	(247)	4,205	4,067
Other components of net periodic benefit income	99	91	136
Gain (Loss) on Sales of Loans, Net			2,166
Noninterest Income, Other	97	4	(224)
Noninterest Income	$ 1,178	$ 4,631	$ 11,933

Quarterly Financial Data (una_3

Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Interest and Dividend Income, Operating	$ 91,800	$ 89,566	$ 87,445	$ 88,909	$ 91,829	$ 94,589	$ 92,226	$ 81,856	$ 357,720	$ 360,500	$ 310,801
Interest Expense	5,479	5,726	6,259	12,626	14,820	17,488	16,375	14,080	30,090	62,763	43,903
Interest Income (Expense), Net	86,321	83,840	81,186	76,283	77,009	77,101	75,851	67,776	327,630	297,737	266,898
Provision for loan losses	(19,159)	13,836	12,224	5,153	(213)	1,967	1,919	2,498	12,054	6,171	7,945
Income before income taxes	55,475	36,703	35,127	27,340	30,215	37,532	26,548	30,476	154,645	124,771	131,299
Net Income (Loss) Attributable to Parent	$ 45,200	$ 30,846	$ 29,505	$ 22,372	$ 23,936	$ 31,146	$ 22,163	$ 25,455	$ 127,923	$ 102,700	$ 110,387
Basic (in dollars per share)	$ 2.77	$ 1.89	$ 1.81	$ 1.37	$ 1.46	$ 1.90	$ 1.34	$ 1.63	$ 7.85	$ 6.33	$ 7.13
Diluted (in dollars per share)	$ 2.75	$ 1.88	$ 1.80	$ 1.36	$ 1.45	$ 1.89	$ 1.33	$ 1.62	$ 7.80	$ 6.29	$ 7.07
Weighted Average Number of Shares Outstanding, Basic	16,310,551,000	16,300,720,000	16,296,427,000	16,303,602,000	16,342,485,000	16,382,798,000	16,560,545,000	15,651,541,000	16,302,825	16,234,342	15,488,982
Weighted Average Number of Shares Outstanding, Diluted	16,434,812,000	16,393,792,000	16,375,434,000	16,425,881,000	16,454,553,000	16,475,741,000	16,642,571,000	15,744,777,000	16,407,502	16,329,456	15,611,489