Park National (PRK) 10-Q 31 Oct 17 2017 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 30, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Entity Registrant Name	PARK NATIONAL CORP /OH/
Entity Central Index Key	805,676
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		15,288,211

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 118,884	$ 122,811
Money market instruments	331,468	23,635
Cash and cash equivalents	450,352	146,446
Investment securities:
Securities available-for-sale, at fair value (amortized cost of $1,163,893 and $1,262,761 at September 30, 2017 and December 31, 2016, respectively)	1,166,562	1,258,139
Securities held-to-maturity, at amortized cost (fair value of $347,110 and $256,672 at September 30, 2017 and December 31, 2016, respectively)	342,665	259,833
Other investment securities	61,811	61,811
Total investment securities	1,571,038	1,579,783
Loans	5,365,877	5,271,857
Allowance for loan losses	(55,232)	(50,624)
Net loans	5,310,645	5,221,233
Bank owned life insurance	188,254	185,234
Prepaid assets	95,717	88,874
Goodwill	72,334	72,334
Premises and equipment, net	56,179	57,971
Affordable housing tax credit investments	54,355	52,947
Other real estate owned	14,366	13,926
Interest Receivable	21,246	18,822
Mortgage loan servicing rights	9,479	9,266
Other	18,730	20,750
Total assets	7,862,695	7,467,586
Liabilities and Shareholders' Equity:
Noninterest bearing	1,568,177	1,523,417
Interest bearing	4,406,145	3,998,539
Total deposits	5,974,322	5,521,956
Short-term borrowings	192,896	394,795
Long-term debt	848,992	694,281
Subordinated debentures and notes	15,000	45,000
Unfunded commitments in affordable housing tax credit investments	21,282	14,282
Accrued interest payable	2,582	2,151
Other	48,254	52,881
Total liabilities	7,103,328	6,725,346
Shareholders' equity:
Preferred shares (200,000 shares authorized; 0 shares issued)	0	0
Common shares (No par value; 20,000,000 shares authorized; 16,150,769 shares issued at September 30, 2017 and 16,150,807 shares issued at December 31, 2016)	307,143	305,826
Retained earnings	553,434	535,631
Treasury shares (873,708 shares at September 30, 2017 and 810,089 at December 31, 2016)	(88,205)	(81,472)
Accumulated other comprehensive loss, net of taxes	(13,005)	(17,745)
Total shareholders' equity	759,367	742,240
Total liabilities and shareholders' equity	$ 7,862,695	$ 7,467,586

Consolidated Condensed Balance3

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Securities available-for-sale, amortized cost	$ 1,163,893	$ 1,262,761
Securities held-to-maturity, fair value	$ 347,110	$ 256,672
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	16,150,769	16,150,807
Treasury stock shares	873,708	810,089

Consolidated Condensed Statemen

Consolidated Condensed Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest and dividend income:
Interest and fees on loans	$ 63,110	$ 59,893	$ 184,240	$ 178,346
Interest and dividends on:
Obligations of U.S. Government, its agencies and other securities	6,757	7,339	20,787	23,718
Interest Income, Securities, State and Municipal	1,974	689	5,098	1,653
Other interest income	1,383	321	2,330	844
Total interest and dividend income	73,224	68,242	212,455	204,561
Interest on deposits:
Demand and savings deposits	2,882	1,094	6,787	2,851
Time deposits	2,521	2,352	7,139	7,128
Interest on borrowings:
Short-term borrowings	197	84	616	330
Long-term debt	6,073	6,179	17,632	18,415
Total interest expense	11,673	9,709	32,174	28,724
Net interest income	61,551	58,533	180,281	175,837
Provision for (recovery of) loan losses	3,283	(7,366)	8,740	(3,819)
Net interest income after provision for loan losses	58,268	65,899	171,541	179,656
Other income:
Income from fiduciary activities	5,932	5,315	17,471	15,866
Service charges on deposit accounts	3,216	3,800	9,511	10,798
Other service income	3,357	3,640	9,608	9,565
Checkcard fee income	3,974	3,780	11,775	11,180
Bank owned life insurance income	1,573	1,038	3,790	3,284
ATM Fees	605	581	1,708	1,734
OREO valuation adjustments	(22)	(233)	(367)	(572)
Gain on sale of OREO, net	51	783	204	1,079
Other	3,403	1,831	5,147	3,726
Total other income	22,089	20,535	58,847	56,660
Other expense:
Salaries and employee benefits	23,302	22,084	69,020	64,894
Employee Benefits and Share-based Compensation	4,656	5,073	14,756	14,740
Occupancy expense	2,559	2,506	7,759	7,693
Furniture and equipment expense	3,868	3,437	11,126	10,296
Data processing fees	1,919	1,450	5,560	4,040
Professional fees and services	6,100	6,356	16,947	18,424
Marketing	1,122	1,062	3,262	3,246
Insurance	1,499	1,423	4,586	4,272
Communication	1,110	1,154	3,598	3,728
Excise and Sales Taxes	912	895	2,918	2,619
Other expense	2,764	1,316	5,847	8,009
Total other expense	49,811	46,756	145,379	141,961
Income before income taxes	30,546	39,678	85,009	94,355
Income taxes	8,434	12,229	23,598	28,222
Net income	22,112	27,449	61,411	66,133
Net income available to common shareholders	$ 22,112	$ 27,449	$ 61,411	$ 66,133
Net income available to common shareholders
Basic	$ 1.45	$ 1.79	$ 4.01	$ 4.31
Diluted	$ 1.44	$ 1.78	$ 3.99	$ 4.29
Weighted average common shares outstanding
Basic	15,287,974	15,330,791	15,299,039	15,330,802
Diluted	15,351,590	15,399,707	15,394,199	15,401,825
Cash dividends declared	$ 0.94	$ 0.94	$ 2.82	$ 2.82

Consolidated Condensed Stateme5

Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income	$ 22,112	$ 27,449	$ 61,411	$ 66,133
Other comprehensive income, net of tax:
Unrealized net holding gain (loss) on securities available-for-sale, net of federal income tax effect of $380 and $(1,174) for the three months ended September 30, 2017 and 2016, and $2,551 and $7,459 for the nine months ended September 30, 2017 and 2016, respectively	707	(2,182)	4,740	13,850
Other comprehensive income (loss)	707	(2,182)	4,740	13,850
Comprehensive income	$ 22,819	$ 25,267	$ 66,151	$ 79,983

Consolidated Condensed Stateme6

Consolidated Condensed Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Unrealized net holding gain (loss) on securities available-for-sale, Tax expense (benefit)	$ 380	$ (1,174)	$ 2,551	$ 7,459

Consolidated Condensed Stateme7

Consolidated Condensed Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Treasury Stock At Cost [Member]	Accumulated Other Comprehensive Income (loss) [Member]
Balance at Dec. 31, 2015		$ 0	$ 303,966	$ 507,505	$ (82,473)	$ (15,643)
Net Income	$ 66,133			66,133
Other comprehensive income, net of tax:
Unrealized net holding (loss) gain on securities available-for-sale, net of income taxes	13,850					13,850
Dividends on common shares at $2.82 per share				(43,461)
Cash payment for fractional shares in dividend reinvestment plan			(3)
Allocated Share-based Compensation Expense	1,200		1,189
Balance at Sep. 30, 2016		0	305,152	530,177	(82,473)	(1,793)
Balance at Dec. 31, 2016	742,240	0	305,826	535,631	(81,472)	(17,745)
Net Income	61,411			61,411
Other comprehensive income, net of tax:
Unrealized net holding (loss) gain on securities available-for-sale, net of income taxes	4,740					4,740
Dividends on common shares at $2.82 per share				(43,411)
Cash payment for fractional shares in dividend reinvestment plan			(4)
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures			(795)	(197)	(645)
Allocated Share-based Compensation Expense	2,116		2,116
Treasury Stock, Value, Acquired, Cost Method	(7,378)
Balance at Sep. 30, 2017	$ 759,367	$ 0	$ 307,143	$ 553,434	$ (88,205)	$ (13,005)

Consolidated Condensed Stateme8

Consolidated Condensed Statements Of Changes In Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock per share	$ 2.82	$ 2.82
Treasury Stock, Shares, Acquired	70,000	0
Stock Issued During Period, Shares, Restricted Stock Award, Gross	9,674	0

Consolidated Condensed Stateme9

Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for (recovery of) loan losses	$ 8,740	$ (3,819)
Amortization of investment securities, net	6,927	5,439
Provision for depreciation	6,463	6,283
Amortization of investment securities, net	1,013	103
Amortization of prepayment penalty on long-term debt	4,711	4,618
Loan originations to be sold in secondary market	(168,255)	(205,576)
Proceeds from sale of loans in secondary market	170,703	201,616
Share-based compensation expense	2,116	1,189
OREO valuation adjustments	367	572
Gain on sale of OREO, net	(204)	(1,079)
Bank owned life insurance income	(3,790)	(3,284)
Changes in assets and liabilities:
Increase in other assets	(15,603)	(15,890)
(Decrease) increase in other liabilities	(4,502)	5,443
Net cash provided by operating activities	66,666	57,810
Proceeds from maturity of:
Available-for-sale securities	128,736	706,634
Held-to-maturity securities	12,264	19,301
Purchases of:
Available-for-sale securities	(29,684)	(473,627)
Payments to Acquire Held-to-maturity Securities	(96,293)	(61,155)
Net loan originations, portfolio loans	(95,808)	(109,114)
Investments in qualified affordable housing projects	0	(4,555)
Proceeds from the sale of OREO	2,363	6,954
Life insurance death benefits	1,037	1,050
Purchases of premises and equipment, net	(4,995)	(5,516)
Net cash (used in) provided by investing activities	(82,380)	79,972
Financing activities:
Net increase in deposits	452,366	172,017
Net decrease in short-term borrowings	(201,899)	(176,028)
Proceeds from issuance of long-term debt	150,000	0
Repayments of Subordinated Debt	(30,000)	0
Payments Related to Tax Withholding for Share-based Compensation	(347)	0
Repurchase of common shares to be held as treasury shares	(7,378)	0
Cash dividends paid	(43,122)	(43,232)
Net cash provided by (used in) financing activities	319,620	(47,243)
Increase in cash and cash equivalents	303,906	90,539
Cash and cash equivalents at beginning of year	146,446	149,459
Cash and cash equivalents at end of period	450,352	239,998
Supplemental disclosures of cash flow information:
Cash paid for interest	31,743	28,757
Cash paid for income taxes	18,690	17,460
Non cash activities:
Loans transferred to OREO	2,991	2,856
Securities acquired through payable	0	4,323
Affordable Housing Program Obligation, Period Increase (Decrease)	7,000	9,000
Mortgage Loans on Real Estate [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of loans in secondary market	$ 3,431	$ 3,938

Basis Of Presentation

Basis Of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation	Basis of Presentation The accompanying unaudited consolidated condensed financial statements included in this report have been prepared for Park National Corporation (sometimes also referred to as the “Registrant”) and its subsidiaries. Unless the context otherwise requires, references to "Park", the "Corporation" or the "Company" and similar terms mean Park National Corporation and its subsidiaries. In the opinion of management, all adjustments (consisting of normal recurring accruals) necessary for a fair presentation of the results of operations for the interim periods included herein have been made. The results of operations for the three-month and nine-month periods ended September 30, 2017 are not necessarily indicative of the operating results to be anticipated for the fiscal year ending December 31, 2017. The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with the instructions for Form 10-Q and, therefore, do not include all information and footnotes necessary for a fair presentation of the condensed balance sheets, condensed statements of income, condensed statements of comprehensive income, condensed statements of changes in shareholders’ equity and condensed statements of cash flows in conformity with United States ("U.S.") generally accepted accounting principles (“U.S. GAAP”). These financial statements should be read in conjunction with the consolidated financial statements incorporated by reference in the Annual Report on Form 10-K of Park for the fiscal year ended December 31, 2016 from Park’s 2016 Annual Report to Shareholders (“Park's 2016 Annual Report”). Certain prior period amounts have been reclassified to conform to the current period presentation. Park’s significant accounting policies are described in Note 1 of the Notes to Consolidated Financial Statements included in Park’s 2016 Annual Report. For interim reporting purposes, Park follows the same basic accounting policies, as updated by the information contained in this report, and considers each interim period an integral part of an annual period.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements ASU 2014-09 - Revenue from Contracts with Customers (Topic 606): In May 2014, the Financial Accounting Standards Board (the "FASB") issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The ASU creates a new topic, Topic 606, to provide guidance on revenue recognition for entities that enter into contracts with customers to transfer goods or services or enter into contracts for the transfer of nonfinancial assets. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures are required to provide quantitative and qualitative information regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2017. While interest income is specifically out of scope of this guidance, management is currently evaluating the revenue streams within "Other income" to assess the applicability of this guidance. Specifically, management is evaluating the impact of this new guidance on deposit fees recorded within "Service charges on deposit accounts", interchange income recorded within "Checkcard fee income", and trust income recorded within "Income from fiduciary activities." Additionally, management is evaluating new disclosure requirements as a result of this ASU. ASU 2016-01 - Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. In January 2016, the FASB issued ASU 2016-01 - Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. Changes to the current U.S. GAAP model primarily affect the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the ASU clarifies guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale securities. The new guidance is effective for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2017. The adoption of this guidance is not expected to have a material impact on Park's consolidated financial statements, but will impact the fair value disclosures in Note 14. ASU 2016-02 - Leases (Topic 842): In February 2016, the FASB issued ASU 2016-02 - Leases (Topic 842) . The ASU will require all organizations that lease assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. Additional qualitative and quantitative disclosures will be required so that users can understand more about the nature of an entity’s leasing activities. The new guidance is effective for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2018. Early adoption is permitted. Management is currently analyzing data on leased assets. The adoption of this guidance is expected to increase both assets and liabilities, but is not expected to have a material impact on Park's consolidated statements of income. ASU 2016-09 - Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting: In March 2016, FASB issued ASU 2016-09 - Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The ASU provides simplification for several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The new guidance was effective for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2016. The adoption of this guidance on January 1, 2017 did not have a material impact on Park's consolidated financial statements. ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments: In June 2016, FASB issued ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The new guidance replaces the incurred loss model with an expected loss model, which is referred to as the current expected credit loss ("CECL") model. The CECL model is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables, held-to-maturity 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 model requires an entity to estimate the credit losses over the life of an asset or off-balance sheet exposure. The new guidance is effective for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2019. Early adoption is permitted for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2018. Management is currently evaluating the impact of the adoption of this guidance on Park's consolidated financial statements. We anticipate that the adoption of the CECL model will result in a material increase to Park's allowance for loan losses. Management has established a committee to oversee the implementation of CECL and is currently in the process of implementing a software solution to assist in the adoption of this ASU. Management plans to run our current incurred loss model and a CECL model concurrently for 12 months prior to the adoption of this guidance on January 1, 2020. ASU 2016-15 - Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force): In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) . This ASU provides guidance on eight specific cash flow issues where current U.S. GAAP is either unclear or does not include specific guidance. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2017. As such transactions arise, management will utilize the updated guidance in determining the amounts reported in Park’s consolidated statements of cash flows. ASU 2017-01 – Business Combinations (Topic 805): Clarifying the Definition of a Business: In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . This ASU clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new guidance is effective for annual reporting periods and interim reporting periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. Park intends to adopt this guidance in the fourth quarter of 2017 and will apply this guidance to all future transactions. ASU 2017-04 - Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment: In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This ASU eliminates Step 2 from the goodwill impairment test. Instead, under the new guidance, an entity is to perform its annual goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An impairment charge would be recognized for the amount by which the carrying amount exceeds the reporting unit's fair value. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The early adoption of this guidance with Park's April 1, 2017 annual goodwill impairment test did not have an impact on Park's consolidated financial statements. ASU 2017-07 - Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost: In March 2017, the FASB issued ASU 2017-07 - Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This ASU requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted for interim or annual periods. The adoption of this guidance is not expected to have a material impact on Park's consolidated financial statements. ASU 2017-08 - Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities: In March 2017, the FASB issued ASU 2017-08 - Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This ASU amends the amortization period for certain purchased callable debt securities held at a premium. It shortens the amortization period for the premium to the earliest call date. Under current U.S. GAAP, premiums on callable debt securities generally are amortized to the maturity date. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2018. Early adoption is permitted for interim or annual periods. The adoption of this guidance is not expected to have a material impact on Park's consolidated financial statements. ASU 2017-09 - Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting: In May 2017, the FASB issued ASU 2017-09 - Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. This ASU amends the guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted for interim or annual periods. The adoption of this guidance is not expected to have a material impact on Park's consolidated financial statements. ASU 2017-12 - Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities: In August 2017, the FASB issued ASU 2017-12 - Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This ASU amends the guidance with the objective of improving the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements. In addition, this ASU amends the current guidance to simplify the application of the hedge accounting guidance. The new guidance is effective for annual reporting periods, and interim reporting periods within those annual periods, beginning after December 15, 2018. Early adoption is permitted for interim or annual periods. The adoption of this guidance is not expected to have a material impact on Park's consolidated financial statements. Park is considering the early adoption of this guidance.

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans The composition of the loan portfolio, by class of loan, as of September 30, 2017 and December 31, 2016 was as follows: September 30, 2017 December 31, 2016 (In thousands) Loan Balance Accrued Interest Receivable Recorded Investment Loan Balance Accrued Interest Receivable Recorded Investment Commercial, financial and agricultural * $ 1,025,057 $ 4,581 $ 1,029,638 $ 994,619 $ 3,558 $ 998,177 Commercial real estate * 1,155,662 4,464 1,160,126 1,155,703 4,161 1,159,864 Construction real estate: Commercial 139,210 462 139,672 135,343 398 135,741 Mortgage 47,629 109 47,738 48,699 106 48,805 Installment 4,209 11 4,220 4,903 17 4,920 Residential real estate: Commercial 391,502 959 392,461 406,687 940 407,627 Mortgage 1,135,289 1,469 1,136,758 1,169,495 1,459 1,170,954 HELOC 206,665 896 207,561 212,441 853 213,294 Installment 19,131 54 19,185 19,874 67 19,941 Consumer 1,238,191 3,409 1,241,600 1,120,850 3,385 1,124,235 Leases 3,332 52 3,384 3,243 29 3,272 Total loans $ 5,365,877 $ 16,466 $ 5,382,343 $ 5,271,857 $ 14,973 $ 5,286,830 * Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class. Loans are shown net of deferred origination fees, costs and unearned income of $12.0 million at September 30, 2017 and $11.1 million at December 31, 2016 , which represented a net deferred income position in both periods. Overdrawn deposit accounts of $1.8 million and $2.9 million had been reclassified to loans at September 30, 2017 and December 31, 2016 , respectively, and are included in the commercial, financial and agricultural loan class above. Credit Quality The following tables present the recorded investment in nonaccrual loans, accruing troubled debt restructurings ("TDRs"), and loans past due 90 days or more and still accruing by class of loan as of September 30, 2017 and December 31, 2016 : September 30, 2017 (In thousands) Nonaccrual Loans Accruing Troubled Debt Restructurings Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 29,141 $ 737 $ — $ 29,878 Commercial real estate 17,889 5,106 — 22,995 Construction real estate: Commercial 1,096 364 — 1,460 Mortgage 8 84 — 92 Installment 57 — — 57 Residential real estate: Commercial 19,071 227 — 19,298 Mortgage 17,860 10,599 882 29,341 HELOC 1,514 1,094 — 2,608 Installment 778 556 — 1,334 Consumer 3,154 736 1,155 5,045 Total loans $ 90,568 $ 19,503 $ 2,037 $ 112,108 December 31, 2016 (In thousands) Nonaccrual Loans Accruing Troubled Debt Restructurings Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 20,057 $ 600 $ 15 $ 20,672 Commercial real estate 19,169 5,305 — 24,474 Construction real estate: Commercial 1,833 393 — 2,226 Mortgage — 104 — 104 Installment 61 95 12 168 Residential real estate: Commercial 23,013 89 — 23,102 Mortgage 18,313 9,612 887 28,812 HELOC 1,783 673 25 2,481 Installment 644 609 60 1,313 Consumer 2,949 748 1,139 4,836 Total loans $ 87,822 $ 18,228 $ 2,138 $ 108,188 The following table provides additional information regarding those nonaccrual loans and accruing TDR loans that were individually evaluated for impairment and those collectively evaluated for impairment as of September 30, 2017 and December 31, 2016 . September 30, 2017 December 31, 2016 (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 $ 29,878 $ 29,848 $ 30 $ 20,657 $ 20,624 $ 33 Commercial real estate 22,995 22,995 — 24,474 24,474 — Construction real estate: Commercial 1,460 1,460 — 2,226 2,226 — Mortgage 92 — 92 104 — 104 Installment 57 — 57 156 — 156 Residential real estate: Commercial 19,298 19,298 — 23,102 23,102 — Mortgage 28,459 — 28,459 27,925 — 27,925 HELOC 2,608 — 2,608 2,456 — 2,456 Installment 1,334 — 1,334 1,253 — 1,253 Consumer 3,890 8 3,882 3,697 — 3,697 Total loans $ 110,071 $ 73,609 $ 36,462 $ 106,050 $ 70,426 $ 35,624 All of the loans individually evaluated for impairment were evaluated using the fair value of the underlying 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, together with the related allowance recorded, as of September 30, 2017 and December 31, 2016 . September 30, 2017 December 31, 2016 (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 $ 22,233 $ 16,980 $ — $ 41,075 $ 19,965 $ — Commercial real estate 18,558 18,158 — 23,961 23,474 — Construction real estate: Commercial 2,923 1,460 — 3,662 2,226 — Residential real estate: Commercial 19,393 19,009 — 24,409 22,687 — With an allowance recorded: Commercial, financial and agricultural 14,735 12,868 4,761 810 659 152 Commercial real estate 5,357 4,837 320 1,014 1,000 309 Construction real estate: Commercial — — — — — — Residential real estate: Commercial 289 289 13 427 415 87 Consumer 8 8 8 — — — Total $ 83,496 $ 73,609 $ 5,102 $ 95,358 $ 70,426 $ 548 Management’s general practice is to proactively charge down loans individually evaluated for impairment to the fair value of the underlying collateral. At September 30, 2017 and December 31, 2016 , there were $7.5 million and $24.7 million , respectively, of partial charge-offs on loans individually evaluated for impairment with no related allowance recorded and $2.4 million and $0.2 million , 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 September 30, 2017 and December 31, 2016 of $5.1 million and $0.5 million , respectively. These loans with specific reserves had a recorded investment of $18.0 million and $2.1 million as of September 30, 2017 and December 31, 2016 , 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 of the loan. 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 three and nine months ended September 30, 2017 and September 30, 2016 : Three Months Ended Three Months Ended (In thousands) Recorded Investment as of September 30, 2017 Average Recorded Investment Interest Income Recognized Recorded Investment as of September 30, 2016 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 29,848 $ 28,412 $ 398 $ 23,856 $ 26,679 $ 194 Commercial real estate 22,995 22,241 192 26,065 27,982 243 Construction real estate: Commercial 1,460 1,554 18 4,377 5,643 16 Residential real estate: Commercial 19,298 20,365 46 23,700 24,422 314 Consumer 8 8 — — 10 — Total $ 73,609 $ 72,580 $ 654 $ 77,998 $ 84,736 $ 767 Nine Months Ended Nine Months Ended (In thousands) Recorded Investment as of September 30, 2017 Average Recorded Investment Interest Income Recognized Recorded Investment as of September 30, 2016 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 29,848 $ 23,770 $ 738 $ 23,856 $ 28,217 $ 740 Commercial real estate 22,995 22,470 663 26,065 22,108 608 Construction real estate: Commercial 1,460 1,830 49 4,377 6,244 44 Residential real estate: Commercial 19,298 20,876 452 23,700 24,618 2,619 Consumer 8 7 — — 4 — Total $ 73,609 $ 68,953 $ 1,902 $ 77,998 $ 81,191 $ 4,011 The following tables present the aging of the recorded investment in past due loans as of September 30, 2017 and December 31, 2016 by class of loan. September 30, 2017 (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 $ 70 $ 10,527 $ 10,597 $ 1,019,041 $ 1,029,638 Commercial real estate 82 3,455 3,537 1,156,589 1,160,126 Construction real estate: Commercial — — — 139,672 139,672 Mortgage 213 — 213 47,525 47,738 Installment 11 48 59 4,161 4,220 Residential real estate: Commercial — 1,345 1,345 391,116 392,461 Mortgage 11,305 9,354 20,659 1,116,099 1,136,758 HELOC 400 917 1,317 206,244 207,561 Installment 349 261 610 18,575 19,185 Consumer 10,426 2,333 12,759 1,228,841 1,241,600 Leases — — — 3,384 3,384 Total loans $ 22,856 $ 28,240 $ 51,096 $ 5,331,247 $ 5,382,343 (1) Includes $2.0 million of loans past due 90 days or more and accruing. The remaining are past due nonaccrual loans. (2) Includes $64.4 million of nonaccrual loans which are current in regards to contractual principal and interest payments. December 31, 2016 (in thousands) Accruing Loans Past Due 30-89 Days Past Due (1) Total Past Due Total Current (2) Total Recorded Investment Commercial, financial and agricultural $ 371 $ 4,113 $ 4,484 $ 993,693 $ 998,177 Commercial real estate 355 2,499 2,854 1,157,010 1,159,864 Construction real estate: Commercial — 541 541 135,200 135,741 Mortgage 559 — 559 48,246 48,805 Installment 223 64 287 4,633 4,920 Residential real estate: Commercial 330 3,631 3,961 403,666 407,627 Mortgage 10,854 9,769 20,623 1,150,331 1,170,954 HELOC 970 1,020 1,990 211,304 213,294 Installment 350 319 669 19,272 19,941 Consumer 12,579 2,094 14,673 1,109,562 1,124,235 Leases — — — 3,272 3,272 Total loans $ 26,591 $ 24,050 $ 50,641 $ 5,236,189 $ 5,286,830 (1) Includes $2.1 million of loans past due 90 days or more and accruing. The remaining are past due nonaccrual loans. (2) Includes $65.9 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 September 30, 2017 and December 31, 2016 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 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 an 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 6 (substandard), also considered to be 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 that are 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 September 30, 2017 and December 31, 2016 for all commercial loans: September 30, 2017 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing Troubled Debt Restructurings Pass-Rated Recorded Investment Commercial, financial and agricultural * $ 2,981 $ 395 $ 29,878 $ 996,384 $ 1,029,638 Commercial real estate * 8,364 — 22,995 1,128,767 1,160,126 Construction real estate: Commercial — 114 1,460 138,098 139,672 Residential real estate: Commercial 395 5 19,298 372,763 392,461 Leases — — — 3,384 3,384 Total commercial loans $ 11,740 $ 514 $ 73,631 $ 2,639,396 $ 2,725,281 * Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class. December 31, 2016 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing Troubled Debt Restructurings Pass-Rated Recorded Investment Commercial, financial and agricultural * $ 5,826 $ — $ 20,657 $ 971,694 $ 998,177 Commercial real estate * 7,548 190 24,474 1,127,652 1,159,864 Construction real estate: Commercial 287 118 2,226 133,110 135,741 Residential real estate: Commercial 1,055 124 23,102 383,346 407,627 Leases — — — 3,272 3,272 Total Commercial Loans $ 14,716 $ 432 $ 70,459 $ 2,619,074 $ 2,704,681 * Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class. Troubled Debt Restructurings ("TDRs") Management 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. Certain loans which were modified during the nine -month periods ended September 30, 2017 and September 30, 2016 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. 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, 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. There were no TDR classifications removed during the three-month or nine -month periods ended September 30, 2017 . The TDR classification was removed on $335,000 of loans during the three -month period ended September 30, 2016 and on $2.0 million of loans during the nine -month period ended September 30, 2016 . At September 30, 2017 and December 31, 2016 , there were $42.1 million and $46.9 million , respectively, of TDRs included in the nonaccrual loan totals. At September 30, 2017 and December 31, 2016 , $35.6 million and $38.0 million , respectively, of these nonaccrual TDRs were performing in accordance with the terms of the restructured note. As of September 30, 2017 and December 31, 2016 , loans with a recorded investment of $19.5 million and $18.2 million , respectively, were included in accruing TDR loan totals. Management will continue to review the restructured loans and may determine it appropriate to move certain nonaccrual TDRs to accrual status in the future. At September 30, 2017 and December 31, 2016 , Park had commitments to lend $0.5 million and $0.7 million , respectively, of additional funds to borrowers whose outstanding loan terms had been modified in a TDR. There were $0.8 million and $0.2 million of specific reserves related to TDRs at September 30, 2017 and December 31, 2016 , respectively. Modifications made in 2016 and 2017 were largely the result of renewals and extending the maturity date of the loan at terms consistent with the original note. 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 Accounting Standards Codification (ASC) 310. There were no specific reserves recorded during the three -month periods ended September 30, 2017 and September 30, 2016 as a result of TDRs identified in the respective period. Additional specific reserves of $290,000 and $975,000 were recorded during the nine -month periods ended September 30, 2017 and September 30, 2016 , respectively, as a result of TDRs identified in the respective period. The terms of certain other loans were modified during the three -month and nine -month periods ended September 30, 2017 and September 30, 2016 that did not meet the definition of a TDR. Substandard commercial loans modified during the three -month and nine -month periods ended September 30, 2017 which did not meet the definition of a TDR had a total recorded investment of $918,000 and $1.0 million , respectively. Substandard commercial loans with a recorded investment of $425,000 and $437,000 were modified during the three -month and nine -month periods ended September 30, 2016 and did not meet the definition of a TDR. The renewal/modification of these loans: (1) resulted in a delay in a payment that was considered to be insignificant, or (2) resulted in Park obtaining additional collateral or guarantees that improved the likelihood of the ultimate collection of the loans such that each modification was deemed to be at market terms. Consumer loans modified during the three -month and nine -month periods ended September 30, 2017 which did not meet the definition of a TDR had a total recorded investment of $3.1 million and $6.7 million , respectively. Consumer loans with a recorded investment of $1.3 million and $5.1 million were modified during the three -month and nine -month periods ended September 30, 2016 and did not meet the definition of a TDR. Many of these loans were to borrowers who were not experiencing financial difficulties but who were looking to reduce their cost of funds. The following tables detail the number of contracts modified as TDRs during the three -month and nine -month periods ended September 30, 2017 and September 30, 2016 , as well as the recorded investment of these contracts at September 30, 2017 and September 30, 2016 . The recorded investment pre- and post-modification is generally the same due to the fact that Park does not typically provide for forgiveness of principal. Three Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 14 $ 400 $ 1,015 $ 1,415 Commercial real estate 3 974 481 1,455 Construction real estate: Commercial — — — — Mortgage — — — — Installment — — — — Residential real estate: Commercial 10 144 354 498 Mortgage 5 211 206 417 HELOC 4 123 45 168 Installment 4 110 41 151 Consumer 99 99 735 834 Total loans 139 $ 2,061 $ 2,877 $ 4,938 Three Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 12 $ 152 $ 6,451 $ 6,603 Commercial real estate 6 — 1,777 1,777 Construction real estate: Commercial 1 — 947 947 Mortgage — — — — Installment — — — — Residential real estate: Commercial 4 — 225 225 Mortgage 14 — 1,173 1,173 HELOC 2 — 91 91 Installment 2 33 4 37 Consumer 74 61 1,508 1,569 Total loans 115 $ 246 $ 12,176 $ 12,422 Of those loans which were modified and determined to be a TDR during the three -month period ended September 30, 2017 , $0.5 million were on nonaccrual status as of December 31, 2016 . Of those loans which were modified and determined to be a TDR during the three -month period ended September 30, 2016 , $7.6 million were on nonaccrual status as of December 31, 2015 . Nine Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 25 $ 400 $ 3,769 $ 4,169 Commercial real estate 9 1,525 795 2,320 Construction real estate: Commercial — — — — Mortgage 1 — 8 8 Installment — — — — Residential real estate: Commercial 15 144 558 702 Mortgage 24 746 923 1,669 HELOC 16 478 51 529 Installment 7 175 41 216 Consumer 228 140 1,012 1,152 Total loans 325 $ 3,608 $ 7,157 $ 10,765 Nine Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 29 $ 102 $ 7,242 $ 7,344 Commercial real estate 10 2,812 2,306 5,118 Construction real estate: Commercial 2 — 1,144 1,144 Mortgage — — — — Installment 1 — 9 9 Residential real estate: Commercial 7 — 918 918 Mortgage 23 96 1,713 1,809 HELOC 10 17 184 201 Installment 4 72 7 79 Consumer 223 115 2,042 2,157 Total loans 309 $ 3,214 $ 15,565 $ 18,779 Of those loans which were modified and determined to be a TDR during the nine -month period ended September 30, 2017 , $3.0 million were on nonaccrual status as of December 31, 2016 . Of those loans which were modified and determined to be a TDR during the nine -month period ended September 30, 2016 , $8.5 million were on nonaccrual status as of December 31, 2015 . The following tables present 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 three-month and nine -month periods ended September 30, 2017 and September 30, 2016 , respectively. For these tables, 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. Three Months Ended Three Months Ended (In thousands) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial, financial and agricultural 1 $ 20 5 $ 129 Commercial real estate 1 72 4 808 Construction real estate: Commercial — — — — Mortgage — — — — Installment — — — — Residential real estate: Commercial 1 17 3 679 Mortgage 6 427 13 1,687 HELOC 2 27 — — Installment — — 2 7 Consumer 33 262 53 559 Leases — — — — Total loans 44 $ 825 80 $ 3,869 Of the $0.8 million in modified TDRs which defaulted during the three months ended September 30, 2017 , there were no accruing loans. Of the $3.9 million in modified TDRs which defaulted during the three months ended September 30, 2016 , $14,000 were accruing loans and $3.9 million were nonaccrual loans. Nine Months Ended Nine Months Ended (In thousands) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial, financial and agricultural 1 $ 20 5 $ 129 Commercial real estate 2 248 4 808 Construction real estate: Commercial — — — — Mortgage — — — — Installment — — — — Residential real estate: Commercial 1 17 4 709 Mortgage 6 426 13 1,687 HELOC 3 32 — — Installment — — 2 7 Consumer 45 345 60 611 Leases — — — — Total loans 58 $ 1,088 88 $ 3,951 Of the $1.1 million in modified TDRs which defaulted during the nine months ended September 30, 2017 , $2,000 were accruing loans and $1.1 million were nonaccrual loans. Of the $4.0 million in modified TDRs which defaulted during the nine months ended September 30, 2016 , $14,000 were accruing loans and $3.9 million were nonaccrual loans.

Allowance For Loan Losses

Allowance For Loan Losses	9 Months Ended
	Sep. 30, 2017
Allowance for Loan and Lease Losses Write-offs, Net [Abstract]
Allowance For Loan Losses	Allowance for Loan Losses The allowance for loan losses ("ALLL") 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 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 of the Notes to Consolidated Financial Statements included in Park’s 2016 Annual Report. Loss factors are reviewed quarterly and updated at least annually to reflect recent loan loss history and incorporate current risk and trends which may not be recognized in historical data. The historical loss factors were last updated in the fourth quarter of 2016 to incorporate losses through December 31, 2016. The activity in the allowance for loan losses for the three -month and nine -month periods ended September 30, 2017 and September 30, 2016 is summarized in the following tables. Three Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 16,746 $ 10,451 $ 4,677 $ 10,319 $ 11,629 $ — $ 53,822 Charge-offs 626 628 78 217 2,828 — 4,377 Recoveries 115 13 303 1,061 1,011 1 2,504 Net charge-offs/(recoveries) 511 615 (225 ) (844 ) 1,817 (1 ) 1,873 Provision/(recovery) 1,742 336 499 (1,078 ) 1,785 (1 ) 3,283 Ending balance $ 17,977 $ 10,172 $ 5,401 $ 10,085 $ 11,597 $ — $ 55,232 Three Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 16,478 $ 9,203 $ 8,256 $ 13,180 $ 11,581 $ 1 $ 58,699 Charge-offs 457 4 1,300 293 2,086 — 4,140 Recoveries 246 973 3,659 348 1,142 1 6,369 Net charge-offs/(recoveries) 211 (969 ) (2,359 ) (55 ) 944 (1 ) (2,229 ) Provision/(recovery) 3 401 (5,257 ) (1,907 ) (604 ) (2 ) (7,366 ) Ending balance $ 16,270 $ 10,573 $ 5,358 $ 11,328 $ 10,033 $ — $ 53,562 Nine Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 13,434 $ 10,432 $ 5,247 $ 10,958 $ 10,553 $ — $ 50,624 Charge-offs 1,283 1,050 105 987 7,706 — 11,131 Recoveries 647 368 686 1,688 3,609 1 6,999 Net charge-offs/(recoveries) 636 682 (581 ) (701 ) 4,097 (1 ) 4,132 Provision/(recovery) 5,179 422 (427 ) (1,574 ) 5,141 (1 ) 8,740 Ending balance $ 17,977 $ 10,172 $ 5,401 $ 10,085 $ 11,597 $ — $ 55,232 Nine Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 13,694 $ 9,197 $ 8,564 $ 13,514 $ 11,524 $ 1 $ 56,494 Charge-offs 1,601 82 1,318 1,776 7,183 — 11,960 Recoveries 889 3,005 4,708 1,226 3,017 2 12,847 Net charge-offs/(recoveries) 712 (2,923 ) (3,390 ) 550 4,166 (2 ) (887 ) Provision/(recovery) 3,288 (1,547 ) (6,596 ) (1,636 ) 2,675 (3 ) (3,819 ) Ending balance $ 16,270 $ 10,573 $ 5,358 $ 11,328 $ 10,033 $ — $ 53,562 Loans collectively evaluated for impairment in the following tables include all performing loans at September 30, 2017 and December 31, 2016 , 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 September 30, 2017 and December 31, 2016 , which are evaluated for impairment in accordance with U.S. GAAP (see Note 1 of the Notes to Consolidated Financial Statements included in Park’s 2016 Annual Report). The composition of the allowance for loan losses at September 30, 2017 and December 31, 2016 was as follows: September 30, 2017 (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 $ 4,761 $ 320 $ — $ 13 $ 8 $ — $ 5,102 Collectively evaluated for impairment 13,216 9,852 5,401 10,072 11,589 — 50,130 Total ending allowance balance $ 17,977 $ 10,172 $ 5,401 $ 10,085 $ 11,597 $ — $ 55,232 Loan balance: Loans individually evaluated for impairment $ 29,844 $ 22,943 $ 1,458 $ 19,297 $ 8 $ — $ 73,550 Loans collectively evaluated for impairment 995,213 1,132,719 189,590 1,733,290 1,238,183 3,332 5,292,327 Total ending loan balance $ 1,025,057 $ 1,155,662 $ 191,048 $ 1,752,587 $ 1,238,191 $ 3,332 $ 5,365,877 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 15.95 % 1.39 % — % 0.07 % — % — % 6.94 % Loans collectively evaluated for impairment 1.33 % 0.87 % 2.85 % 0.58 % 0.94 % — % 0.95 % Total 1.75 % 0.88 % 2.83 % 0.58 % 0.94 % — % 1.03 % Recorded investment: Loans individually evaluated for impairment $ 29,848 $ 22,995 $ 1,460 $ 19,298 $ 8 $ — $ 73,609 Loans collectively evaluated for impairment 999,790 1,137,131 190,170 1,736,667 1,241,592 3,384 5,308,734 Total ending recorded investment $ 1,029,638 $ 1,160,126 $ 191,630 $ 1,755,965 $ 1,241,600 $ 3,384 $ 5,382,343 December 31, 2016 (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 $ 152 $ 309 $ — $ 87 $ — $ — $ 548 Collectively evaluated for impairment 13,282 10,123 5,247 10,871 10,553 — 50,076 Total ending allowance balance $ 13,434 $ 10,432 $ 5,247 $ 10,958 $ 10,553 $ — $ 50,624 Loan balance: Loans individually evaluated for impairment $ 20,622 $ 24,465 $ 2,226 $ 23,102 $ — $ — $ 70,415 Loans collectively evaluated for impairment 973,997 1,131,238 186,719 1,785,395 1,120,850 3,243 5,201,442 Total ending loan balance $ 994,619 $ 1,155,703 $ 188,945 $ 1,808,497 $ 1,120,850 $ 3,243 $ 5,271,857 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 0.74 % 1.26 % — % 0.38 % — % — % 0.78 % Loans collectively evaluated for impairment 1.36 % 0.89 % 2.81 % 0.61 % 0.94 % — % 0.96 % Total 1.35 % 0.90 % 2.78 % 0.61 % 0.94 % — % 0.96 % Recorded investment: Loans individually evaluated for impairment $ 20,624 $ 24,474 $ 2,226 $ 23,102 $ — $ — $ 70,426 Loans collectively evaluated for impairment 977,553 1,135,390 187,240 1,788,714 1,124,235 3,272 5,216,404 Total ending recorded investment $ 998,177 $ 1,159,864 $ 189,466 $ 1,811,816 $ 1,124,235 $ 3,272 $ 5,286,830

Other Real Estate Owned Other R

Other Real Estate Owned Other Real Estate Owned	9 Months Ended
	Sep. 30, 2017
Other Real Estate Owned [Abstract]
Real Estate Owned [Text Block]	Other Real Estate Owned ("OREO") Park typically transfers a loan to OREO at the time that Park takes deed/title to the asset. The carrying amounts of foreclosed properties held at September 30, 2017 and December 31, 2016 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) September 30, 2017 December 31, 2016 OREO: Commercial real estate $ 8,049 $ 7,642 Construction real estate 4,861 4,624 Residential real estate 1,456 1,660 Total OREO $ 14,366 $ 13,926 Loans in process of foreclosure: Residential real estate $ 3,288 $ 3,250

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The following table sets forth the computation of basic and diluted earnings per common share for the three and nine months ended September 30, 2017 and 2016 . Three Months Ended Nine Months Ended (In thousands, except share and per common share data) 2017 2016 2017 2016 Numerator: Net income $ 22,112 $ 27,449 $ 61,411 $ 66,133 Denominator: Weighted-average common shares outstanding 15,287,974 15,330,791 15,299,039 15,330,802 Effect of dilutive performance-based restricted stock units 63,616 68,916 95,160 71,023 Weighted-average common shares outstanding adjusted for the effect of dilutive performance-based restricted stock units 15,351,590 15,399,707 15,394,199 15,401,825 Earnings per common share: Basic earnings per common share $ 1.45 $ 1.79 $ 4.01 $ 4.31 Diluted earnings per common share $ 1.44 $ 1.78 $ 3.99 $ 4.29 Park awarded 45,788 and 41,550 performance-based restricted stock units ("PBRSUs") to certain employees during the nine months ended September 30, 2017 and 2016, respectively. No PBRSUs were awarded during the three months ended September 30, 2017 and 2016. As of September 30, 2017, 119,587 PBRSUs were outstanding. The PBRSUs vest based on service and performance conditions. The dilutive effect of the outstanding PBRSUs was the addition of 63,616 and 68,916 common shares for the three months ended September 30, 2017 and 2016, respectively, and 95,160 and 71,023 common shares for the nine months ended September 30, 2017 and 2016, respectively. Park repurchased 20,000 and 70,000 common shares during the three months and nine months ended September 30, 2017, respectively, to fund the PBRSUs and common shares awarded to directors of Park and to directors of Park's subsidiary PNB (and its divisions). Park did no t repurchase any common shares during the three or nine months ended September 30, 2016.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
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 its chartered national bank subsidiary, The Park National Bank (headquartered in Newark, Ohio) (“PNB”), SE Property Holdings, LLC (“SEPH”), and Guardian Financial Services Company (“GFSC”). Management is required 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 the company’s performance, better understand the potential for future cash flows, and make more informed judgments about the company as a whole. Park has three operating segments, 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 and President, who is the chief operating decision maker. Operating Results for the three months ended September 30, 2017 (In thousands) PNB GFSC SEPH All Other Total Net interest income $ 59,415 $ 1,455 $ 401 $ 280 $ 61,551 Provision for (recovery of) loan losses 3,820 609 (1,146 ) — 3,283 Other income 20,367 18 411 1,293 22,089 Other expense 45,987 734 996 2,094 49,811 Income (loss) before income taxes $ 29,975 $ 130 $ 962 $ (521 ) $ 30,546 Federal income tax expense (benefit) 8,678 46 336 (626 ) 8,434 Net income $ 21,297 $ 84 $ 626 $ 105 $ 22,112 Assets (as of September 30, 2017) $ 7,788,248 $ 33,260 $ 25,377 $ 15,810 $ 7,862,695 Operating Results for the three months ended September 30, 2016 (In thousands) PNB GFSC SEPH All Other Total Net interest income $ 57,033 $ 1,472 $ 8 $ 20 $ 58,533 Recovery of loan losses (3,345 ) (313 ) (3,708 ) — (7,366 ) Other income (loss) 19,279 (1 ) 1,126 131 20,535 Other expense 42,327 800 1,789 1,840 46,756 Income (loss) before income taxes $ 37,330 $ 984 $ 3,053 $ (1,689 ) $ 39,678 Federal income tax expense (benefit) 11,839 344 1,070 (1,024 ) 12,229 Net income (loss) $ 25,491 $ 640 $ 1,983 $ (665 ) $ 27,449 Assets (as of September 30, 2016) $ 7,287,923 $ 32,759 $ 36,938 $ 6,472 $ 7,364,092 Operating Results for the nine months ended September 30, 2017 (In thousands) PNB GFSC SEPH All Other Total Net interest income $ 174,717 $ 4,424 $ 884 $ 256 $ 180,281 Provision for (recovery of) loan losses 9,114 1,419 (1,793 ) — 8,740 Other income 57,257 10 390 1,190 58,847 Other expense 133,667 2,295 3,010 6,407 145,379 Income (loss) before income taxes $ 89,193 $ 720 $ 57 $ (4,961 ) $ 85,009 Federal income tax expense (benefit) 26,247 252 20 (2,921 ) 23,598 Net income (loss) $ 62,946 $ 468 $ 37 $ (2,040 ) $ 61,411 Operating Results for the nine months ended September 30, 2016 (In thousands) PNB GFSC SEPH All Other Total Net interest income (expense) $ 170,194 $ 4,416 $ 1,240 $ (13 ) $ 175,837 (Recovery of) provision for loan losses (450 ) 1,658 (5,027 ) — (3,819 ) Other income (loss) 55,010 (1 ) 1,272 379 56,660 Other expense 126,418 3,632 4,525 7,386 141,961 Income (loss) before income taxes $ 99,236 $ (875 ) $ 3,014 $ (7,020 ) $ 94,355 Federal income tax expense (benefit) 30,923 (305 ) 1,056 (3,452 ) 28,222 Net income (loss) $ 68,313 $ (570 ) $ 1,958 $ (3,568 ) $ 66,133 The operating results of the Parent Company in the “All Other” column are used to reconcile the segment totals to the consolidated condensed statements of income for the three-month and nine-month periods ended September 30, 2017 and 2016 . The reconciling amounts for consolidated total assets for the periods ended September 30, 2017 and 2016 consisted of the elimination of intersegment borrowings and the assets of the Parent Company which were not eliminated.

Mortgage Loans Held For Sale Mo

Mortgage Loans Held For Sale Mortgage Loans Held for Sale	9 Months Ended
	Sep. 30, 2017
Mortgage Loans Held for Sale [Line Items]
Mortgage Loans Held For Sale Disclosure [Text Block]	Loans Held For Sale Mortgage loans held for sale are carried at their fair value. At September 30, 2017 and December 31, 2016 , respectively, Park had approximately $11.4 million and $10.4 million in mortgage loans held for sale. These amounts are included in loans on the consolidated condensed balance sheets and in the residential real estate loan segments in Note 3 and Note 4. The contractual balance was $11.2 million and $10.3 million at September 30, 2017 and December 31, 2016 , respectively. The gain expected upon sale was $153,000 and $131,000 at September 30, 2017 and December 31, 2016 , respectively. None of these loans were 90 days or more past due or on nonaccrual status as of September 30, 2017 or December 31, 2016 .

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investment 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. For the three-month and nine-month periods ended September 30, 2017 and 2016, there were no investment securities deemed to be other-than-temporarily impaired. Investment securities at September 30, 2017 , were as follows: Securities Available-for-Sale (In thousands) Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 270,000 $ — $ 1,159 $ 268,841 U.S. Government sponsored entities' asset-backed securities 892,784 6,329 5,408 893,705 Other equity securities 1,109 2,907 — 4,016 Total $ 1,163,893 $ 9,236 $ 6,567 $ 1,166,562 Securities Held-to-Maturity (In thousands) Amortized Cost Gross Gross Estimated Fair Value U.S. Government sponsored entities' asset-backed securities $ 58,947 $ 1,003 $ 15 $ 59,935 Obligations of states and political subdivisions 283,718 5,080 $ 1,623 287,175 Total $ 342,665 $ 6,083 $ 1,638 $ 347,110 Investment securities with unrealized/unrecognized losses at September 30, 2017 , were as follows: Unrealized/unrecognized loss position for less than 12 months Unrealized/unrecognized loss position for 12 months or longer Total (In thousands) Fair value Unrealized/unrecognized losses Fair value Unrealized/unrecognized Fair value Unrealized/unrecognized Securities Available-for-Sale Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 24,967 $ 33 $ 243,874 $ 1,126 $ 268,841 $ 1,159 U.S. Government sponsored entities' asset-backed securities 519,984 4,815 $ 63,505 593 $ 583,489 5,408 Total $ 544,951 $ 4,848 $ 307,379 $ 1,719 $ 852,330 $ 6,567 Securities Held-to-Maturity U.S. Government sponsored entities' asset-backed securities $ — $ — $ 7,423 $ 15 $ 7,423 $ 15 Obligations of states and political subdivisions 97,120 $ 1,247 12,983 376 $ 110,103 1,623 Total $ 97,120 $ 1,247 $ 20,406 $ 391 $ 117,526 $ 1,638 Investment securities at December 31, 2016 , were as follows: Securities Available-for-Sale (In thousands) Amortized Cost Gross Gross Estimated Fair Value Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 270,000 $ — $ 2,467 $ 267,533 U.S. Government sponsored entities' asset-backed securities 991,642 5,372 9,842 987,172 Other equity securities 1,119 2,315 — 3,434 Total $ 1,262,761 $ 7,687 $ 12,309 $ 1,258,139 Securities Held-to-Maturity (In thousands) Amortized Cost Gross Gross Estimated Fair Value Obligations of states and political subdivision $ 188,622 $ 977 $ 5,148 $ 184,451 U.S. Government sponsored entities' asset-backed securities 71,211 1,097 87 72,221 Total $ 259,833 $ 2,074 $ 5,235 $ 256,672 Investment securities with unrealized/unrecognized losses at December 31, 2016 , were as follows: Unrealized/unrecognized loss position for less than 12 months Unrealized/unrecognized loss position for 12 months or longer Total (In thousands) Fair value Unrealized/unrecognized Fair value Unrealized/unrecognized Fair Unrealized/unrecognized Securities Available-for-Sale Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 247,695 $ 2,305 $ 19,838 $ 162 $ 267,533 $ 2,467 U.S. Government sponsored entities' asset-backed securities 612,321 9,473 27,325 369 639,646 9,842 Total $ 860,016 $ 11,778 $ 47,163 $ 531 $ 907,179 $ 12,309 Securities Held-to-Maturity Obligations of states and political subdivision $ 134,909 $ 5,148 $ — $ — $ 134,909 $ 5,148 U.S. Government sponsored entities' asset-backed securities — — 7,564 87 7,564 87 Total $ 134,909 $ 5,148 $ 7,564 $ 87 $ 142,473 $ 5,235 Management does not believe any of the unrealized/unrecognized losses at September 30, 2017 or December 31, 2016 represented other-than-temporary impairment. 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 recognized within net income in the period the other-than-temporary impairment is identified. Park’s U.S. Government sponsored entities' asset-backed securities consist of 15 -year residential mortgage-backed securities and collateralized mortgage obligations. The amortized cost and estimated fair value of investments in debt securities at September 30, 2017 , 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 of principal repayments. Securities Available-for-Sale (In thousands) Amortized cost Fair value Tax equivalent yield Obligations of U.S. Treasury and other U.S. Government sponsored entities' obligations: Due less than one year $ 75,000 $ 74,930 1.02 % Due one through five years 195,000 193,911 1.25 % Total $ 270,000 $ 268,841 1.18 % U.S. Government sponsored entities' asset-backed securities $ 892,784 $ 893,705 2.09 % Securities Held-to-Maturity (In thousands) Amortized cost Fair value Tax equivalent yield (1) Obligations of state and political subdivisions: Due over ten years $ 283,718 $ 287,175 4.47 % Total (1) $ 283,718 $ 287,175 4.47 % U.S. Government sponsored entities' asset-backed securities $ 58,947 $ 59,935 3.20 % (1) The tax equivalent yield for obligations of state and political subdivisions includes the effects of a taxable equivalent adjustment using a 35% rate. The aggregate taxable equivalent adjustment was $2.7 million for the nine months ended September 30, 2017. All of Park’s securities shown in the table above as obligations of U.S. Treasury and other U.S. Government sponsored entities' obligations are callable notes. These callable notes have final maturities of 0.1 years to 2.7 years. Of the $268.8 million reported at September 30, 2017 , none were expected to be called. The remaining average life of the entire investment portfolio is estimated to be 4.3 years. There were no sales of investment securities during the three-month or nine-month periods ended September 30, 2017 or 2016. Investment securities having an amortized cost of $933 million and $937 million at September 30, 2017 and December 31, 2016, respectively, were pledged to collateralize government and trust department deposits in accordance with federal and state requirements, to secure repurchase agreements sold and as collateral for FHLB advance borrowings.

Other Investment Securities

Other Investment Securities	9 Months Ended
	Sep. 30, 2017
Other Investment Securities [Abstract]
Other Investment Securities	Other Investment Securities Other investment securities consist of stock investments in the Federal Home Loan Bank ("FHLB"), the Federal Reserve Bank ("FRB") and other equities carried at cost. The FHLB and FRB restricted stock investments are carried at their redemption value. September 30, December 31, 2016 (In thousands) FHLB stock $ 50,086 $ 50,086 FRB stock 8,225 8,225 Other equity investments carried at cost 3,500 3,500 Total other investment securities $ 61,811 $ 61,811

Share Based Compensation Share

Share Based Compensation Share Based Compensation	9 Months Ended
	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	Share-Based Compensation The 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 in the form of incentive stock options, nonqualified stock options, stock appreciation rights (“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. As of September 30, 2017, there were 119,587 common shares subject to performance-based restricted stock units (“PBRSUs”) issued 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 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 September 30, 2017, 750,000 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 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 September 30, 2017, 150,000 common shares were available for future grants under the 2017 Non-Employee Director 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 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 the nine months ended September 30, 2017 and 2016, the Compensation Committee of the Board of Directors of Park granted awards of PBRSUs, under the 2013 Incentive Plan, covering an aggregate of 45,788 and 41,550 common shares, respectively, to certain employees of Park and its subsidiaries. No PBRSUs were granted during the three months ended September 30, 2017 and 2016. 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. A summary of changes in the common shares subject to nonvested PBRSUs for the nine months ended September 30, 2017 follows: Common shares subject to PBRSUs Nonvested at January 1, 2017 85,425 Granted 45,788 Vested 9,674 Forfeited 150 Adjustment for performance conditions of PBRSUs (1) (1,802 ) Nonvested at September 30, 2017 119,587 (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. On March 31, 2017, 9,674 PBRSUs granted in 2014 vested. A total of 3,293 common shares were withheld to pay employee income taxes. This resulted in a net amount of 6,381 common shares being issued to employees of Park. Share-based compensation expense of $727,000 and $398,000 was recognized for the three-month periods ended September 30, 2017 and 2016, respectively, and $2.1 million and $1.2 million for the nine-month periods ended September 30, 2017 and 2016, respectively. The following table details expected additional share-based compensation expense related to PBRSUs currently outstanding: (In thousands) Three months ending December 31, 2017 $ 711 2018 2,509 2019 1,867 2020 845 2021 141 Total $ 6,073

Pension Plan

Pension Plan	9 Months Ended
	Sep. 30, 2017
Defined Benefit Plan [Abstract]
Pension Plan	Pension Plan Park has a noncontributory defined benefit pension plan covering substantially all of its employees. The plan provides benefits based on an employee’s years of service and compensation. There were no pension plan contributions for the three-month or nine-month periods ended September 30, 2017 and 2016 . The following table shows the components of net periodic benefit income: Three Months Ended Nine Months Ended (In thousands) 2017 2016 2017 2016 Service cost $ 1,317 $ 1,264 $ 3,951 $ 3,792 Interest cost 1,271 1,217 3,813 3,651 Expected return on plan assets (2,863 ) (2,737 ) (8,589 ) (8,211 ) Amortization of prior service cost — — — — Recognized net actuarial loss 144 193 432 579 Net periodic benefit income $ (131 ) $ (63 ) $ (393 ) $ (189 )

Loan Servicing

Loan Servicing	9 Months Ended
	Sep. 30, 2017
Transfers and Servicing of Financial Assets [Abstract]
Loan Servicing	Loan Servicing Park serviced sold mortgage loans of $1.36 billion at September 30, 2017 , $1.33 billion at December 31, 2016 and $1.31 billion at September 30, 2016 . At September 30, 2017 , $3.2 million of the sold mortgage loans were sold with recourse, compared to $4.1 million at December 31, 2016 and $4.3 million at September 30, 2016 . Management closely monitors the delinquency rates on the mortgage loans sold with recourse. At both September 30, 2017 and December 31, 2016, management had established reserves of $266,000 to account for expected losses on 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 mortgage servicing rights (“MSRs”) is assessed for impairment with a comparison to fair value. MSRs are carried at the lower of their amortized cost or fair value. Activity for MSRs and the related valuation allowance follows: Three Months Ended Nine Months Ended (In thousands) 2017 2016 2017 2016 Mortgage servicing rights: Carrying amount, net, beginning of period $ 9,476 $ 8,880 $ 9,266 $ 9,008 Additions 559 747 1,434 1,618 Amortization (448 ) (522 ) (1,213 ) (1,312 ) Changes in valuation allowance (108 ) (360 ) (8 ) (569 ) Carrying amount, net, end of period $ 9,479 $ 8,745 $ 9,479 $ 8,745 Valuation allowance: Beginning of period $ 635 $ 751 $ 735 $ 542 Changes in valuation allowance 108 360 8 569 End of period $ 743 $ 1,111 $ 743 $ 1,111 Servicing fees included in other service income were $0.8 million for the three months ended September 30, 2017 and $0.9 million for the same period of 2016. Servicing fees included in other service income were $2.6 million for the nine months ended September 30, 2017 and $2.5 million for the same period of 2016.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value	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 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 September 30, 2017 using: (In thousands) Level 1 Level 2 Level 3 Balance at September 30, 2017 Assets Investment securities: Obligations of U.S. Treasury and other U.S. Government sponsored entities $ — $ 268,841 $ — $ 268,841 U.S. Government sponsored entities’ asset-backed securities — 893,705 — 893,705 Equity securities 3,521 — 495 4,016 Mortgage loans held for sale — 11,396 — 11,396 Mortgage IRLCs — 98 — 98 Liabilities Fair value swap $ — $ — $ 226 $ 226 Fair Value Measurements at December 31, 2016 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2016 Assets Investment securities: Obligations of U.S. Treasury and other U.S. Government sponsored entities $ — $ 267,533 $ — $ 267,533 U.S. Government sponsored entities’ asset-backed securities — 987,172 — 987,172 Equity securities 2,644 — 790 3,434 Mortgage loans held for sale — 10,413 — 10,413 Mortgage IRLCs — 124 — 124 Liabilities Fair value swap $ — $ — $ 226 $ 226 There were no transfers between Level 1 and Level 2 during the three or nine months ended September 30, 2017 or 2016 . Management’s policy is to transfer assets or liabilities from one level to another when the methodology to obtain the fair value changes such that there are more or fewer unobservable inputs as of the end of the reporting period. The following methods and assumptions were used by the Company in determining the fair value of the financial assets and liabilities discussed above: Investment securities: Fair values for investment securities are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments. For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows. 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 (IRLCs): 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 security prices for similar product types and, therefore, are classified in Level 2. The tables below are a reconciliation of the beginning and ending balances of the Level 3 inputs for the three and nine months ended September 30, 2017 and 2016 , for financial instruments measured on a recurring basis and classified as Level 3: Level 3 Fair Value Measurements Three months ended September 30, 2017 and 2016 (In thousands) Equity Securities Fair value swap Balance at July 1, 2017 $ 458 $ (226 ) Total gains/(losses) Included in other comprehensive income 37 — Balance at September 30, 2017 $ 495 $ (226 ) Balance at July 1, 2016 $ 821 $ (226 ) Total gains/(losses) Included in other comprehensive income (42 ) — Balance at September 30, 2016 $ 779 $ (226 ) Level 3 Fair Value Measurements Nine months ended September 30, 2017 and 2016 (In thousands) Equity Securities Fair value swap Balance at January 1, 2017 $ 790 $ (226 ) Total gains/(losses) Transfers out of Level 3 (1) (346 ) — Included in other comprehensive income 51 — Balance at September 30, 2017 $ 495 $ (226 ) Balance at January 1, 2016 $ 769 $ (226 ) Total gains/(losses) Included in other comprehensive income 10 — Balance at September 30, 2016 $ 779 $ (226 ) (1) Transfered from Level 3 to Level 1 as the result of a quoted market price becoming available. 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 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 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. Other Real Estate Owned ("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. 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. 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 to the property's value subsequent to the initial measurement. Fair Value Measurements at September 30, 2017 using: (In thousands) Level 1 Level 2 Level 3 Balance at September 30, 2017 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 6,147 $ 6,147 Construction real estate — — 127 127 Residential real estate — — 863 863 Total impaired loans recorded at fair value $ — $ — $ 7,137 $ 7,137 Mortgage servicing rights $ — $ 7,110 $ — $ 7,110 OREO: Commercial real estate — — 2,457 2,457 Construction real estate — — 3,212 3,212 Residential real estate — — 1,093 1,093 Total OREO recorded at fair value $ — $ — $ 6,762 $ 6,762 Fair Value Measurements at December 31, 2016 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2016 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 3,057 $ 3,057 Construction real estate — — 541 541 Residential real estate — — 2,385 2,385 Total impaired loans recorded at fair value $ — $ — $ 5,983 $ 5,983 Mortgage servicing rights $ — $ 6,769 $ — $ 6,769 OREO: Commercial real estate — — 2,644 2,644 Construction real estate — — 3,322 3,322 Residential real estate — — 931 931 Total OREO recorded at fair value $ — $ — $ 6,897 $ 6,897 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. September 30, 2017 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 7,470 $ 2,822 $ 333 $ 7,137 Remaining impaired loans 66,139 7,124 4,769 61,370 Total impaired loans $ 73,609 $ 9,946 $ 5,102 $ 68,507 December 31, 2016 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 6,379 $ 3,681 $ 396 $ 5,983 Remaining impaired loans 64,047 21,262 152 63,895 Total impaired loans $ 70,426 $ 24,943 $ 548 $ 69,878 The (expense) income from credit adjustments related to impaired loans carried at fair value during the three months ended September 30, 2017 and 2016 was $(0.7) million and $2.9 million , respectively. The (expense) income from credit adjustments related to impaired loans carried at fair value during the nine months ended September 30, 2017 and 2016 was $(1.2) million and $1.9 million , respectively. MSRs totaled $9.5 million at September 30, 2017 . Of this $9.5 million MSR carrying balance, $7.1 million was recorded at fair value and included a valuation allowance of $0.7 million . The remaining $2.4 million was recorded at cost, as the fair value of the MSRs exceeded cost at September 30, 2017 . At December 31, 2016 , MSRs totaled $9.3 million . Of this $9.3 million MSR carrying balance, $6.8 million was recorded at fair value and included a valuation allowance of $0.7 million . The remaining $2.5 million was recorded at cost, as the fair value exceeded cost at December 31, 2016 . The expense related to MSRs carried at fair value during the three months ended September 30, 2017 and 2016 was $108,000 and $360,000 , respectively. The expense related to MSRs carried at fair value during the nine months ended September 30, 2017 and 2016 was $8,000 and $569,000 , respectively. Total OREO held by Park at September 30, 2017 and December 31, 2016 was $14.4 million and $13.9 million , respectively. Approximately 47% and 50% of OREO held by Park at September 30, 2017 and December 31, 2016 , respectively, was carried at fair value due to fair value adjustments made subsequent to the initial OREO measurement. At September 30, 2017 and December 31, 2016 , OREO held at fair value, less estimated selling costs, amounted to $6.8 million and $6.9 million , respectively. The net expense related to OREO fair value adjustments was $22,000 and $233,000 for the three -month periods ended September 30, 2017 and 2016 , respectively. The net expense related to OREO fair value adjustments was $367,000 and $572,000 for the nine -month periods ended September 30, 2017 and 2016 , respectively. The following tables present qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2017 and December 31, 2016 : September 30, 2017 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 6,147 Sales comparison approach Adj to comparables 0.0% - 102.0% (40.1%) Income approach Capitalization rate 8.8% - 12.5% (9.4%) Cost approach Accumulated depreciation 90.1% (90.1%) Construction real estate $ 127 Sales comparison approach Adj to comparables 0.0% - 4.8% (2.4%) Residential real estate $ 863 Sales comparison approach Adj to comparables 0.1% - 33.0% (11.7%) Income approach Capitalization rate 10.5% (10.5%) Other real estate owned: Commercial real estate $ 2,457 Sales comparison approach Adj to comparables 0.0% - 68.4% (28.9%) Income approach Capitalization rate 12.0% - 13.0% (12.9%) Construction real estate $ 3,212 Sales comparison approach Adj to comparables 0.0% - 90.0% (24.4%) Bulk sale approach Discount rate 15.0% (15.0%) Residential real estate $ 1,093 Sales comparison approach Adj to comparables 1.2% - 79.7% (30.8%) Balance at December 31, 2016 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 3,057 Sales comparison approach Adj to comparables 0.0% - 90.0% (20.2%) Income approach Capitalization rate 9.0% - 10.6% (10.1%) Cost approach Accumulated depreciation 17.0% - 18.0% (17.8%) Construction real estate $ 541 Sales comparison approach Adj to comparables 0.0% - 11.1% (1.6%) Bulk sale approach Discount rate 10.0% (10.0%) Residential real estate $ 2,385 Sales comparison approach Adj to comparables 0.3% - 110.0% (17.0%) Income approach Capitalization rate 10.0% (10.0%) Other real estate owned: Commercial real estate $ 2,644 Sales comparison approach Adj to comparables 0.0% - 68.4% (26.5%) Income approach Capitalization rate 13.0% - 14.0% (13.1%) Construction real estate $ 3,322 Sales comparison approach Adj to comparables 0.0% - 90.0% (24.7%) Bulk sale approach Discount rate 15.0% (15.0%) Residential real estate $ 931 Sales comparison approach Adj to comparables 3.2% - 79.7% (30.6%) The following methods and assumptions were used by Park in estimating its fair value disclosures for assets and liabilities not discussed above: Cash and cash equivalents: The carrying amounts reported in the consolidated condensed balance sheets for cash and short-term instruments approximate those assets’ fair values. Other investments: FHLB and FRB stock within "Other investments" are carried at their respective redemption values as it is not practical to calculate their fair values. Additional investments within "Other investments" are carried at their cost basis as these investments do not have a readily determinable fair value and Park does not have the ability to influence the operating or financial decisions of the investee. Loans receivable: For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. The fair values for certain mortgage loans (e.g., one-to-four family residential) are based on quoted market prices of similar loans sold in conjunction with securitization transactions, adjusted for differences in loan characteristics. The fair values for other loans are estimated using discounted cash flow analyses, based upon interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. The methods utilized to estimate the fair value do not necessarily represent what the exit price would be. Off-balance sheet instruments: Fair values for Park’s loan commitments and standby letters of credit are based on the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. The carrying amount and fair value are not material. Deposit liabilities: The fair values disclosed for demand deposits (e.g., interest and non-interest checking, savings, and money market accounts) are, by definition, equal to the amounts payable on demand at the reporting date (i.e., their carrying amounts). The carrying amounts for variable-rate, fixed-term certificates of deposit approximate their fair values at the reporting date. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities of time deposits. Short-term borrowings: The carrying amounts of federal funds purchased, borrowings under repurchase agreements and other short-term borrowings approximate their fair values. Long-term debt: Fair values for long-term debt are estimated using a discounted cash flow calculation that applies interest rates currently being offered on long-term debt to a schedule of monthly maturities. Subordinated notes: Fair values for subordinated notes are estimated using a discounted cash flow calculation that applies interest rate spreads currently being offered on similar debt structures to a schedule of monthly maturities. The fair value of financial instruments at September 30, 2017 and December 31, 2016 , was as follows: September 30, 2017 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 450,352 $ 450,352 $ — $ — $ 450,352 Investment securities (1) 1,509,227 3,521 1,509,656 495 1,513,672 Accrued interest receivable - securities 4,780 — 4,780 — 4,780 Accrued interest receivable - loans 16,466 — — 16,466 16,466 Loans held for sale 11,396 — 11,396 — 11,396 Mortgage IRLCs 98 — 98 — 98 Impaired loans carried at fair value 7,137 — — 7,137 7,137 Other loans, net 5,292,014 — — 5,269,250 5,269,250 Loans receivable, net $ 5,310,645 $ — $ 11,494 $ 5,276,387 $ 5,287,881 Financial liabilities: Noninterest bearing checking accounts $ 1,568,177 $ 1,568,177 $ — $ — $ 1,568,177 Interest bearing transactions accounts 1,374,401 1,374,401 — — 1,374,401 Savings accounts 1,969,887 1,969,887 — — 1,969,887 Time deposits 1,056,570 — 1,058,886 — 1,058,886 Other 5,287 5,287 — — 5,287 Total deposits $ 5,974,322 $ 4,917,752 $ 1,058,886 $ — $ 5,976,638 Short-term borrowings $ 192,896 $ — $ 192,896 $ — $ 192,896 Long-term debt 848,992 — 859,473 — 859,473 Subordinated notes 15,000 — 12,738 — 12,738 Accrued interest payable – deposits 1,142 63 1,079 — 1,142 Accrued interest payable – debt/borrowings 1,140 2 1,438 — 1,440 Derivative financial instruments: Fair value swap $ 226 $ — $ — $ 226 $ 226 (1) Investment securities excludes the category "Other investment securities." This category consists of FHLB and FRB stock carried at their respective redemption values as it is not practical to calculate their fair values. Additional investments within "Other investment securities" are carried at their cost basis as these investments do not have a readily determinable fair value and Park does not have the ability to influence the operating or financial decisions of the investee. December 31, 2016 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 146,466 $ 146,466 $ — $ — $ 146,466 Investment securities (1) 1,517,972 2,644 1,511,377 790 1,514,811 Accrued interest receivable - securities 3,849 — 3,849 — 3,849 Accrued interest receivable - loans 14,973 — — 14,973 14,973 Loans held for sale 10,413 — 10,413 — 10,413 Mortgage IRLCs 124 — 124 — 124 Impaired loans carried at fair value 5,983 — — 5,983 5,983 Other loans, net 5,204,713 — — 5,161,919 5,161,919 Loans receivable, net $ 5,221,233 $ — $ 10,537 $ 5,167,902 $ 5,178,439 Financial liabilities: Noninterest bearing checking accounts $ 1,523,417 $ 1,523,417 $ — $ — $ 1,523,417 Interest bearing transactions accounts 1,174,448 1,174,448 — — 1,174,448 Savings accounts 1,704,920 1,704,920 — — 1,704,920 Time deposits 1,117,870 — 1,122,598 — 1,122,598 Other 1,301 1,301 — — 1,301 Total deposits $ 5,521,956 $ 4,404,086 $ 1,122,598 $ — $ 5,526,684 Short-term borrowings $ 394,795 $ — $ 394,795 $ — $ 394,795 Long-term debt 694,281 — 712,958 — 712,958 Subordinated notes 45,000 — 40,903 — 40,903 Accrued interest payable – deposits 900 82 818 — 900 Accrued interest payable – debt/borrowings 1,251 1 1,250 — 1,251 Derivative financial instruments: Fair value swap $ 226 $ — $ — $ 226 $ 226 (1) Investment securities excludes the category "Other investment securities." This category consists of FHLB and FRB stock carried at their respective redemption values as it is not practical to calculate their fair values. Additional investments within "Other investment securities" are carried at their cost basis as these investments do not have a readily determinable fair value and Park does not have the ability to influence the operating or financial decisions of the investee.

Other Comprehensive Income (Los

Other Comprehensive Income (Loss) Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Comprehensive Income (Loss) Note [Text Block]	Other Comprehensive Income Other comprehensive income components, net of tax, are shown in the following table for the three-month and nine-month periods ended September 30, 2017 and 2016 : (in thousands) Changes in pension plan assets and benefit obligations Unrealized gains (losses) on available for sale securities Total Beginning balance at July 1, 2017 $ (14,740 ) $ 1,028 $ (13,712 ) Other comprehensive income before reclassifications — 707 707 Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive income — 707 707 Ending balance at September 30, 2017 $ (14,740 ) $ 1,735 $ (13,005 ) Beginning balance at July 1, 2016 $ (15,351 ) $ 15,740 $ 389 Other comprehensive loss before reclassifications — (2,182 ) (2,182 ) Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive loss — (2,182 ) (2,182 ) Ending balance at September 30, 2016 $ (15,351 ) $ 13,558 $ (1,793 ) (in thousands) Changes in pension plan assets and benefit obligations Unrealized gains (losses) on available for sale securities Total Beginning balance at January 1, 2017 $ (14,740 ) $ (3,005 ) $ (17,745 ) Other comprehensive income before reclassifications — 4,740 4,740 Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive income — 4,740 4,740 Ending balance at September 30, 2017 $ (14,740 ) $ 1,735 $ (13,005 ) Beginning balance at January 1, 2016 $ (15,351 ) $ (292 ) $ (15,643 ) Other comprehensive income before reclassifications — 13,850 13,850 Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive income — 13,850 13,850 Ending balance at September 30, 2016 $ (15,351 ) $ 13,558 $ (1,793 ) During the three-month and nine-month periods ended September 30, 2017 and 2016, there were no reclassifications out of accumulated other comprehensive income.

Investment in Qualified Afforda

Investment in Qualified Affordable Housing Investment in Qualified Affordable Housing	9 Months Ended
	Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Affordable Housing Program [Text Block]	Investment 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 our goals associated with the Community Reinvestment Act. The table below details the balances of Park’s affordable housing tax credit investments and related unfunded commitments as of September 30, 2017 and December 31, 2016. (in thousands) September 30, 2017 December 31, 2016 Affordable housing tax credit investments $ 54,355 $ 52,947 Unfunded commitments 21,282 14,282 Commitments are funded when capital calls are made by the general partner. Park expects that the current commitments will be funded between 2017 and 2027. During the three months ended September 30, 2017 and 2016, Park recognized amortization expense of $1.9 million and $1.8 million , respectively, and during the nine months ended September 30, 2017 and 2016, Park recognized amortization expense of $5.6 million and $5.5 million , respectively, which was included within the provision for income taxes. Additionally, during each of the three months ended September 30, 2017 and 2016, Park recognized tax credits and other benefits from its affordable housing tax credit investments of $2.3 million , respectively, and during the nine months ended September 30, 2017 and 2016, recognized tax credits and other benefits from its affordable housing tax credit investments of $6.9 million and $7.0 million , respectively.

Repurchase Agreement Borrowings

Repurchase Agreement Borrowings Repurchase Agreement Borrowings	9 Months Ended
	Sep. 30, 2017
Transfers and Servicing [Abstract]
Repurchase Agreement Borrowings	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 condensed balance sheets. Park's repurchase agreements with a third-party financial institution are classified as long-term debt on the consolidated condensed 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 reflected in short-term borrowings consisted of customer accounts and securities which are pledged on an individual security basis. At September 30, 2017 and December 31, 2016 , Park's repurchase agreement borrowings totaled $493 million and $510 million , respectively. At both September 30, 2017 and December 31, 2016 , $300 million of Park's repurchase agreement borrowings were classified as long-term debt with the remaining amount being classified as short-term debt on the consolidated condensed balance sheets. These borrowings were collateralized with U.S. government and agency securities with a carrying value of $540 million and $569 million at September 30, 2017 and December 31, 2016 , respectively. Declines in the value of the collateral would require Park to pledge additional securities. As of September 30, 2017 and December 31, 2016 , Park had $619 million and $640 million , respectively, of available unpledged securities. The table below shows the remaining contractual maturity of repurchase agreements by collateral pledged at September 30, 2017 and December 31, 2016 : September 30, 2017 (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 $ 191,792 $ — $ 300,000 $ 1,104 $ 492,896 December 31, 2016 (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 $ 208,691 $ — $ — $ 301,104 $ 509,795 On November 30, 2012, Park restructured $300 million in repurchase agreements with a third-party financial institution and paid a $25 million prepayment penalty. The penalty is included in long-term debt and is being amortized as an adjustment to interest expense over the remaining term of the repurchase agreements using the effective interest method. Of the $25 million prepayment penalty, $868,000 and $4.7 million remained unamortized as of September 30, 2017 and December 31, 2016 , respectively. These repurchase agreements mature on November 30, 2017.

Contingent Liabilities Continge

Contingent Liabilities Contingent Liabilities	9 Months Ended
	Sep. 30, 2017
Contingent Liabilities [Abstract]
Schedule of Loss Contingencies by Contingency [Table Text Block]	Contingent Liabilities The Company is a defendant in lawsuits and other adversary proceedings arising in the ordinary course of business. Legal costs incurred in connection with the resolution of claims and lawsuits are generally expensed as incurred, and the Company establishes accruals for the outcome of litigation where losses are deemed probable and reasonably estimable. The Company’s assessment of the current exposure could change in the event of the discovery of additional facts with respect to legal matters pending against the Company or determinations by judges, juries, administrative agencies or other finders of fact that are not in accordance with the Company’s evaluation of claims. As of June 30, 2017, the Company had accrued charges of approximately $2.3 million for legal contingencies related to various legal and other adversary proceedings. This amount was paid out in full settlement of the related litigation during the three months ended September 30, 2017.

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
Loans and Leases Receivable Disclosure [Abstract]
Composition Of Loan Portfolio By Class Of Loan	The composition of the loan portfolio, by class of loan, as of September 30, 2017 and December 31, 2016 was as follows: September 30, 2017 December 31, 2016 (In thousands) Loan Balance Accrued Interest Receivable Recorded Investment Loan Balance Accrued Interest Receivable Recorded Investment Commercial, financial and agricultural * $ 1,025,057 $ 4,581 $ 1,029,638 $ 994,619 $ 3,558 $ 998,177 Commercial real estate * 1,155,662 4,464 1,160,126 1,155,703 4,161 1,159,864 Construction real estate: Commercial 139,210 462 139,672 135,343 398 135,741 Mortgage 47,629 109 47,738 48,699 106 48,805 Installment 4,209 11 4,220 4,903 17 4,920 Residential real estate: Commercial 391,502 959 392,461 406,687 940 407,627 Mortgage 1,135,289 1,469 1,136,758 1,169,495 1,459 1,170,954 HELOC 206,665 896 207,561 212,441 853 213,294 Installment 19,131 54 19,185 19,874 67 19,941 Consumer 1,238,191 3,409 1,241,600 1,120,850 3,385 1,124,235 Leases 3,332 52 3,384 3,243 29 3,272 Total loans $ 5,365,877 $ 16,466 $ 5,382,343 $ 5,271,857 $ 14,973 $ 5,286,830 * Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.
Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing	The following tables present the recorded investment in nonaccrual loans, accruing troubled debt restructurings ("TDRs"), and loans past due 90 days or more and still accruing by class of loan as of September 30, 2017 and December 31, 2016 : September 30, 2017 (In thousands) Nonaccrual Loans Accruing Troubled Debt Restructurings Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 29,141 $ 737 $ — $ 29,878 Commercial real estate 17,889 5,106 — 22,995 Construction real estate: Commercial 1,096 364 — 1,460 Mortgage 8 84 — 92 Installment 57 — — 57 Residential real estate: Commercial 19,071 227 — 19,298 Mortgage 17,860 10,599 882 29,341 HELOC 1,514 1,094 — 2,608 Installment 778 556 — 1,334 Consumer 3,154 736 1,155 5,045 Total loans $ 90,568 $ 19,503 $ 2,037 $ 112,108 December 31, 2016 (In thousands) Nonaccrual Loans Accruing Troubled Debt Restructurings Loans Past Due 90 Days or More and Accruing Total Nonperforming Loans Commercial, financial and agricultural $ 20,057 $ 600 $ 15 $ 20,672 Commercial real estate 19,169 5,305 — 24,474 Construction real estate: Commercial 1,833 393 — 2,226 Mortgage — 104 — 104 Installment 61 95 12 168 Residential real estate: Commercial 23,013 89 — 23,102 Mortgage 18,313 9,612 887 28,812 HELOC 1,783 673 25 2,481 Installment 644 609 60 1,313 Consumer 2,949 748 1,139 4,836 Total loans $ 87,822 $ 18,228 $ 2,138 $ 108,188
Loans Individually And Collectively Evaluated For Impairment	The following table provides additional information regarding those nonaccrual loans and accruing TDR loans that were individually evaluated for impairment and those collectively evaluated for impairment as of September 30, 2017 and December 31, 2016 . September 30, 2017 December 31, 2016 (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 $ 29,878 $ 29,848 $ 30 $ 20,657 $ 20,624 $ 33 Commercial real estate 22,995 22,995 — 24,474 24,474 — Construction real estate: Commercial 1,460 1,460 — 2,226 2,226 — Mortgage 92 — 92 104 — 104 Installment 57 — 57 156 — 156 Residential real estate: Commercial 19,298 19,298 — 23,102 23,102 — Mortgage 28,459 — 28,459 27,925 — 27,925 HELOC 2,608 — 2,608 2,456 — 2,456 Installment 1,334 — 1,334 1,253 — 1,253 Consumer 3,890 8 3,882 3,697 — 3,697 Total loans $ 110,071 $ 73,609 $ 36,462 $ 106,050 $ 70,426 $ 35,624
Loans Individually Evaluated For Impairment By Class Of Loans	The following table presents loans individually evaluated for impairment by class of loan, together with the related allowance recorded, as of September 30, 2017 and December 31, 2016 . September 30, 2017 December 31, 2016 (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 $ 22,233 $ 16,980 $ — $ 41,075 $ 19,965 $ — Commercial real estate 18,558 18,158 — 23,961 23,474 — Construction real estate: Commercial 2,923 1,460 — 3,662 2,226 — Residential real estate: Commercial 19,393 19,009 — 24,409 22,687 — With an allowance recorded: Commercial, financial and agricultural 14,735 12,868 4,761 810 659 152 Commercial real estate 5,357 4,837 320 1,014 1,000 309 Construction real estate: Commercial — — — — — — Residential real estate: Commercial 289 289 13 427 415 87 Consumer 8 8 8 — — — Total $ 83,496 $ 73,609 $ 5,102 $ 95,358 $ 70,426 $ 548
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 three and nine months ended September 30, 2017 and September 30, 2016 : Three Months Ended Three Months Ended (In thousands) Recorded Investment as of September 30, 2017 Average Recorded Investment Interest Income Recognized Recorded Investment as of September 30, 2016 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 29,848 $ 28,412 $ 398 $ 23,856 $ 26,679 $ 194 Commercial real estate 22,995 22,241 192 26,065 27,982 243 Construction real estate: Commercial 1,460 1,554 18 4,377 5,643 16 Residential real estate: Commercial 19,298 20,365 46 23,700 24,422 314 Consumer 8 8 — — 10 — Total $ 73,609 $ 72,580 $ 654 $ 77,998 $ 84,736 $ 767 Nine Months Ended Nine Months Ended (In thousands) Recorded Investment as of September 30, 2017 Average Recorded Investment Interest Income Recognized Recorded Investment as of September 30, 2016 Average Recorded Investment Interest Income Recognized Commercial, financial and agricultural $ 29,848 $ 23,770 $ 738 $ 23,856 $ 28,217 $ 740 Commercial real estate 22,995 22,470 663 26,065 22,108 608 Construction real estate: Commercial 1,460 1,830 49 4,377 6,244 44 Residential real estate: Commercial 19,298 20,876 452 23,700 24,618 2,619 Consumer 8 7 — — 4 — Total $ 73,609 $ 68,953 $ 1,902 $ 77,998 $ 81,191 $ 4,011
Aging Of Recorded Investment In Past Due Loans	The following tables present the aging of the recorded investment in past due loans as of September 30, 2017 and December 31, 2016 by class of loan. September 30, 2017 (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 $ 70 $ 10,527 $ 10,597 $ 1,019,041 $ 1,029,638 Commercial real estate 82 3,455 3,537 1,156,589 1,160,126 Construction real estate: Commercial — — — 139,672 139,672 Mortgage 213 — 213 47,525 47,738 Installment 11 48 59 4,161 4,220 Residential real estate: Commercial — 1,345 1,345 391,116 392,461 Mortgage 11,305 9,354 20,659 1,116,099 1,136,758 HELOC 400 917 1,317 206,244 207,561 Installment 349 261 610 18,575 19,185 Consumer 10,426 2,333 12,759 1,228,841 1,241,600 Leases — — — 3,384 3,384 Total loans $ 22,856 $ 28,240 $ 51,096 $ 5,331,247 $ 5,382,343 (1) Includes $2.0 million of loans past due 90 days or more and accruing. The remaining are past due nonaccrual loans. (2) Includes $64.4 million of nonaccrual loans which are current in regards to contractual principal and interest payments. December 31, 2016 (in thousands) Accruing Loans Past Due 30-89 Days Past Due (1) Total Past Due Total Current (2) Total Recorded Investment Commercial, financial and agricultural $ 371 $ 4,113 $ 4,484 $ 993,693 $ 998,177 Commercial real estate 355 2,499 2,854 1,157,010 1,159,864 Construction real estate: Commercial — 541 541 135,200 135,741 Mortgage 559 — 559 48,246 48,805 Installment 223 64 287 4,633 4,920 Residential real estate: Commercial 330 3,631 3,961 403,666 407,627 Mortgage 10,854 9,769 20,623 1,150,331 1,170,954 HELOC 970 1,020 1,990 211,304 213,294 Installment 350 319 669 19,272 19,941 Consumer 12,579 2,094 14,673 1,109,562 1,124,235 Leases — — — 3,272 3,272 Total loans $ 26,591 $ 24,050 $ 50,641 $ 5,236,189 $ 5,286,830 (1) Includes $2.1 million of loans past due 90 days or more and accruing. The remaining are past due nonaccrual loans. (2) Includes $65.9 million of nonaccrual loans which are current in regards to contractual principal and interest payments.
Recorded Investment By Loan Grade	The tables below present the recorded investment by loan grade at September 30, 2017 and December 31, 2016 for all commercial loans: September 30, 2017 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing Troubled Debt Restructurings Pass-Rated Recorded Investment Commercial, financial and agricultural * $ 2,981 $ 395 $ 29,878 $ 996,384 $ 1,029,638 Commercial real estate * 8,364 — 22,995 1,128,767 1,160,126 Construction real estate: Commercial — 114 1,460 138,098 139,672 Residential real estate: Commercial 395 5 19,298 372,763 392,461 Leases — — — 3,384 3,384 Total commercial loans $ 11,740 $ 514 $ 73,631 $ 2,639,396 $ 2,725,281 * Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class. December 31, 2016 (In thousands) 5 Rated 6 Rated Nonaccrual and Accruing Troubled Debt Restructurings Pass-Rated Recorded Investment Commercial, financial and agricultural * $ 5,826 $ — $ 20,657 $ 971,694 $ 998,177 Commercial real estate * 7,548 190 24,474 1,127,652 1,159,864 Construction real estate: Commercial 287 118 2,226 133,110 135,741 Residential real estate: Commercial 1,055 124 23,102 383,346 407,627 Leases — — — 3,272 3,272 Total Commercial Loans $ 14,716 $ 432 $ 70,459 $ 2,619,074 $ 2,704,681
TDR Number Of Contracts Modified And Recorded Investment	The following tables detail the number of contracts modified as TDRs during the three -month and nine -month periods ended September 30, 2017 and September 30, 2016 , as well as the recorded investment of these contracts at September 30, 2017 and September 30, 2016 . The recorded investment pre- and post-modification is generally the same due to the fact that Park does not typically provide for forgiveness of principal. Three Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 14 $ 400 $ 1,015 $ 1,415 Commercial real estate 3 974 481 1,455 Construction real estate: Commercial — — — — Mortgage — — — — Installment — — — — Residential real estate: Commercial 10 144 354 498 Mortgage 5 211 206 417 HELOC 4 123 45 168 Installment 4 110 41 151 Consumer 99 99 735 834 Total loans 139 $ 2,061 $ 2,877 $ 4,938 Three Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 12 $ 152 $ 6,451 $ 6,603 Commercial real estate 6 — 1,777 1,777 Construction real estate: Commercial 1 — 947 947 Mortgage — — — — Installment — — — — Residential real estate: Commercial 4 — 225 225 Mortgage 14 — 1,173 1,173 HELOC 2 — 91 91 Installment 2 33 4 37 Consumer 74 61 1,508 1,569 Total loans 115 $ 246 $ 12,176 $ 12,422 Of those loans which were modified and determined to be a TDR during the three -month period ended September 30, 2017 , $0.5 million were on nonaccrual status as of December 31, 2016 . Of those loans which were modified and determined to be a TDR during the three -month period ended September 30, 2016 , $7.6 million were on nonaccrual status as of December 31, 2015 . Nine Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 25 $ 400 $ 3,769 $ 4,169 Commercial real estate 9 1,525 795 2,320 Construction real estate: Commercial — — — — Mortgage 1 — 8 8 Installment — — — — Residential real estate: Commercial 15 144 558 702 Mortgage 24 746 923 1,669 HELOC 16 478 51 529 Installment 7 175 41 216 Consumer 228 140 1,012 1,152 Total loans 325 $ 3,608 $ 7,157 $ 10,765 Nine Months Ended (In thousands) Number of Contracts Accruing Nonaccrual Total Recorded Investment Commercial, financial and agricultural 29 $ 102 $ 7,242 $ 7,344 Commercial real estate 10 2,812 2,306 5,118 Construction real estate: Commercial 2 — 1,144 1,144 Mortgage — — — — Installment 1 — 9 9 Residential real estate: Commercial 7 — 918 918 Mortgage 23 96 1,713 1,809 HELOC 10 17 184 201 Installment 4 72 7 79 Consumer 223 115 2,042 2,157 Total loans 309 $ 3,214 $ 15,565 $ 18,779 Of those loans which were modified and determined to be a TDR during the nine -month period ended September 30, 2017 , $3.0 million were on nonaccrual status as of December 31, 2016 . Of those loans which were modified and determined to be a TDR during the nine -month period ended September 30, 2016 , $8.5 million were on nonaccrual status as of December 31, 2015 .
Recorded Investment In Financing Receivable Modified As TDR Within 12 Months	The following tables present 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 three-month and nine -month periods ended September 30, 2017 and September 30, 2016 , respectively. For these tables, 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. Three Months Ended Three Months Ended (In thousands) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial, financial and agricultural 1 $ 20 5 $ 129 Commercial real estate 1 72 4 808 Construction real estate: Commercial — — — — Mortgage — — — — Installment — — — — Residential real estate: Commercial 1 17 3 679 Mortgage 6 427 13 1,687 HELOC 2 27 — — Installment — — 2 7 Consumer 33 262 53 559 Leases — — — — Total loans 44 $ 825 80 $ 3,869 Of the $0.8 million in modified TDRs which defaulted during the three months ended September 30, 2017 , there were no accruing loans. Of the $3.9 million in modified TDRs which defaulted during the three months ended September 30, 2016 , $14,000 were accruing loans and $3.9 million were nonaccrual loans. Nine Months Ended Nine Months Ended (In thousands) Number of Contracts Recorded Investment Number of Contracts Recorded Investment Commercial, financial and agricultural 1 $ 20 5 $ 129 Commercial real estate 2 248 4 808 Construction real estate: Commercial — — — — Mortgage — — — — Installment — — — — Residential real estate: Commercial 1 17 4 709 Mortgage 6 426 13 1,687 HELOC 3 32 — — Installment — — 2 7 Consumer 45 345 60 611 Leases — — — — Total loans 58 $ 1,088 88 $ 3,951 Of the $1.1 million in modified TDRs which defaulted during the nine months ended September 30, 2017 , $2,000 were accruing loans and $1.1 million were nonaccrual loans. Of the $4.0 million in modified TDRs which defaulted during the nine months ended September 30, 2016 , $14,000 were accruing loans and $3.9 million were nonaccrual loans.

Allowance For Loan Losses (Tabl

Allowance For Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2017
Allowance for Loan and Lease Losses Write-offs, Net [Abstract]
Activity In The Allowance For Loan Losses	The activity in the allowance for loan losses for the three -month and nine -month periods ended September 30, 2017 and September 30, 2016 is summarized in the following tables. Three Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 16,746 $ 10,451 $ 4,677 $ 10,319 $ 11,629 $ — $ 53,822 Charge-offs 626 628 78 217 2,828 — 4,377 Recoveries 115 13 303 1,061 1,011 1 2,504 Net charge-offs/(recoveries) 511 615 (225 ) (844 ) 1,817 (1 ) 1,873 Provision/(recovery) 1,742 336 499 (1,078 ) 1,785 (1 ) 3,283 Ending balance $ 17,977 $ 10,172 $ 5,401 $ 10,085 $ 11,597 $ — $ 55,232 Three Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 16,478 $ 9,203 $ 8,256 $ 13,180 $ 11,581 $ 1 $ 58,699 Charge-offs 457 4 1,300 293 2,086 — 4,140 Recoveries 246 973 3,659 348 1,142 1 6,369 Net charge-offs/(recoveries) 211 (969 ) (2,359 ) (55 ) 944 (1 ) (2,229 ) Provision/(recovery) 3 401 (5,257 ) (1,907 ) (604 ) (2 ) (7,366 ) Ending balance $ 16,270 $ 10,573 $ 5,358 $ 11,328 $ 10,033 $ — $ 53,562 Nine Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 13,434 $ 10,432 $ 5,247 $ 10,958 $ 10,553 $ — $ 50,624 Charge-offs 1,283 1,050 105 987 7,706 — 11,131 Recoveries 647 368 686 1,688 3,609 1 6,999 Net charge-offs/(recoveries) 636 682 (581 ) (701 ) 4,097 (1 ) 4,132 Provision/(recovery) 5,179 422 (427 ) (1,574 ) 5,141 (1 ) 8,740 Ending balance $ 17,977 $ 10,172 $ 5,401 $ 10,085 $ 11,597 $ — $ 55,232 Nine Months Ended (In thousands) Commercial, financial and agricultural Commercial real estate Construction real estate Residential real estate Consumer Leases Total Allowance for loan losses: Beginning balance $ 13,694 $ 9,197 $ 8,564 $ 13,514 $ 11,524 $ 1 $ 56,494 Charge-offs 1,601 82 1,318 1,776 7,183 — 11,960 Recoveries 889 3,005 4,708 1,226 3,017 2 12,847 Net charge-offs/(recoveries) 712 (2,923 ) (3,390 ) 550 4,166 (2 ) (887 ) Provision/(recovery) 3,288 (1,547 ) (6,596 ) (1,636 ) 2,675 (3 ) (3,819 ) Ending balance $ 16,270 $ 10,573 $ 5,358 $ 11,328 $ 10,033 $ — $ 53,562
Composition Of The Allowance For Loan Losses	The composition of the allowance for loan losses at September 30, 2017 and December 31, 2016 was as follows: September 30, 2017 (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 $ 4,761 $ 320 $ — $ 13 $ 8 $ — $ 5,102 Collectively evaluated for impairment 13,216 9,852 5,401 10,072 11,589 — 50,130 Total ending allowance balance $ 17,977 $ 10,172 $ 5,401 $ 10,085 $ 11,597 $ — $ 55,232 Loan balance: Loans individually evaluated for impairment $ 29,844 $ 22,943 $ 1,458 $ 19,297 $ 8 $ — $ 73,550 Loans collectively evaluated for impairment 995,213 1,132,719 189,590 1,733,290 1,238,183 3,332 5,292,327 Total ending loan balance $ 1,025,057 $ 1,155,662 $ 191,048 $ 1,752,587 $ 1,238,191 $ 3,332 $ 5,365,877 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 15.95 % 1.39 % — % 0.07 % — % — % 6.94 % Loans collectively evaluated for impairment 1.33 % 0.87 % 2.85 % 0.58 % 0.94 % — % 0.95 % Total 1.75 % 0.88 % 2.83 % 0.58 % 0.94 % — % 1.03 % Recorded investment: Loans individually evaluated for impairment $ 29,848 $ 22,995 $ 1,460 $ 19,298 $ 8 $ — $ 73,609 Loans collectively evaluated for impairment 999,790 1,137,131 190,170 1,736,667 1,241,592 3,384 5,308,734 Total ending recorded investment $ 1,029,638 $ 1,160,126 $ 191,630 $ 1,755,965 $ 1,241,600 $ 3,384 $ 5,382,343 December 31, 2016 (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 $ 152 $ 309 $ — $ 87 $ — $ — $ 548 Collectively evaluated for impairment 13,282 10,123 5,247 10,871 10,553 — 50,076 Total ending allowance balance $ 13,434 $ 10,432 $ 5,247 $ 10,958 $ 10,553 $ — $ 50,624 Loan balance: Loans individually evaluated for impairment $ 20,622 $ 24,465 $ 2,226 $ 23,102 $ — $ — $ 70,415 Loans collectively evaluated for impairment 973,997 1,131,238 186,719 1,785,395 1,120,850 3,243 5,201,442 Total ending loan balance $ 994,619 $ 1,155,703 $ 188,945 $ 1,808,497 $ 1,120,850 $ 3,243 $ 5,271,857 Allowance for loan losses as a percentage of loan balance: Loans individually evaluated for impairment 0.74 % 1.26 % — % 0.38 % — % — % 0.78 % Loans collectively evaluated for impairment 1.36 % 0.89 % 2.81 % 0.61 % 0.94 % — % 0.96 % Total 1.35 % 0.90 % 2.78 % 0.61 % 0.94 % — % 0.96 % Recorded investment: Loans individually evaluated for impairment $ 20,624 $ 24,474 $ 2,226 $ 23,102 $ — $ — $ 70,426 Loans collectively evaluated for impairment 977,553 1,135,390 187,240 1,788,714 1,124,235 3,272 5,216,404 Total ending recorded investment $ 998,177 $ 1,159,864 $ 189,466 $ 1,811,816 $ 1,124,235 $ 3,272 $ 5,286,830

Other Real Estate Owned Other30

Other Real Estate Owned Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2017
Other Real Estate Owned [Abstract]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Table Text Block] [Text Block]	Park typically transfers a loan to OREO at the time that Park takes deed/title to the asset. The carrying amounts of foreclosed properties held at September 30, 2017 and December 31, 2016 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) September 30, 2017 December 31, 2016 OREO: Commercial real estate $ 8,049 $ 7,642 Construction real estate 4,861 4,624 Residential real estate 1,456 1,660 Total OREO $ 14,366 $ 13,926 Loans in process of foreclosure: Residential real estate $ 3,288 $ 3,250

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Summary 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 for the three and nine months ended September 30, 2017 and 2016 . Three Months Ended Nine Months Ended (In thousands, except share and per common share data) 2017 2016 2017 2016 Numerator: Net income $ 22,112 $ 27,449 $ 61,411 $ 66,133 Denominator: Weighted-average common shares outstanding 15,287,974 15,330,791 15,299,039 15,330,802 Effect of dilutive performance-based restricted stock units 63,616 68,916 95,160 71,023 Weighted-average common shares outstanding adjusted for the effect of dilutive performance-based restricted stock units 15,351,590 15,399,707 15,394,199 15,401,825 Earnings per common share: Basic earnings per common share $ 1.45 $ 1.79 $ 4.01 $ 4.31 Diluted earnings per common share $ 1.44 $ 1.78 $ 3.99 $ 4.29

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule Of Operating Results By Segment	Operating Results for the three months ended September 30, 2017 (In thousands) PNB GFSC SEPH All Other Total Net interest income $ 59,415 $ 1,455 $ 401 $ 280 $ 61,551 Provision for (recovery of) loan losses 3,820 609 (1,146 ) — 3,283 Other income 20,367 18 411 1,293 22,089 Other expense 45,987 734 996 2,094 49,811 Income (loss) before income taxes $ 29,975 $ 130 $ 962 $ (521 ) $ 30,546 Federal income tax expense (benefit) 8,678 46 336 (626 ) 8,434 Net income $ 21,297 $ 84 $ 626 $ 105 $ 22,112 Assets (as of September 30, 2017) $ 7,788,248 $ 33,260 $ 25,377 $ 15,810 $ 7,862,695 Operating Results for the three months ended September 30, 2016 (In thousands) PNB GFSC SEPH All Other Total Net interest income $ 57,033 $ 1,472 $ 8 $ 20 $ 58,533 Recovery of loan losses (3,345 ) (313 ) (3,708 ) — (7,366 ) Other income (loss) 19,279 (1 ) 1,126 131 20,535 Other expense 42,327 800 1,789 1,840 46,756 Income (loss) before income taxes $ 37,330 $ 984 $ 3,053 $ (1,689 ) $ 39,678 Federal income tax expense (benefit) 11,839 344 1,070 (1,024 ) 12,229 Net income (loss) $ 25,491 $ 640 $ 1,983 $ (665 ) $ 27,449 Assets (as of September 30, 2016) $ 7,287,923 $ 32,759 $ 36,938 $ 6,472 $ 7,364,092 Operating Results for the nine months ended September 30, 2017 (In thousands) PNB GFSC SEPH All Other Total Net interest income $ 174,717 $ 4,424 $ 884 $ 256 $ 180,281 Provision for (recovery of) loan losses 9,114 1,419 (1,793 ) — 8,740 Other income 57,257 10 390 1,190 58,847 Other expense 133,667 2,295 3,010 6,407 145,379 Income (loss) before income taxes $ 89,193 $ 720 $ 57 $ (4,961 ) $ 85,009 Federal income tax expense (benefit) 26,247 252 20 (2,921 ) 23,598 Net income (loss) $ 62,946 $ 468 $ 37 $ (2,040 ) $ 61,411 Operating Results for the nine months ended September 30, 2016 (In thousands) PNB GFSC SEPH All Other Total Net interest income (expense) $ 170,194 $ 4,416 $ 1,240 $ (13 ) $ 175,837 (Recovery of) provision for loan losses (450 ) 1,658 (5,027 ) — (3,819 ) Other income (loss) 55,010 (1 ) 1,272 379 56,660 Other expense 126,418 3,632 4,525 7,386 141,961 Income (loss) before income taxes $ 99,236 $ (875 ) $ 3,014 $ (7,020 ) $ 94,355 Federal income tax expense (benefit) 30,923 (305 ) 1,056 (3,452 ) 28,222 Net income (loss) $ 68,313 $ (570 ) $ 1,958 $ (3,568 ) $ 66,133

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule Of Investment Securities	Investment securities at December 31, 2016 , were as follows: Securities Available-for-Sale (In thousands) Amortized Cost Gross Gross Estimated Fair Value Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 270,000 $ — $ 2,467 $ 267,533 U.S. Government sponsored entities' asset-backed securities 991,642 5,372 9,842 987,172 Other equity securities 1,119 2,315 — 3,434 Total $ 1,262,761 $ 7,687 $ 12,309 $ 1,258,139 Securities Held-to-Maturity (In thousands) Amortized Cost Gross Gross Estimated Fair Value Obligations of states and political subdivision $ 188,622 $ 977 $ 5,148 $ 184,451 U.S. Government sponsored entities' asset-backed securities 71,211 1,097 87 72,221 Total $ 259,833 $ 2,074 $ 5,235 $ 256,672 Investment securities at September 30, 2017 , were as follows: Securities Available-for-Sale (In thousands) Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 270,000 $ — $ 1,159 $ 268,841 U.S. Government sponsored entities' asset-backed securities 892,784 6,329 5,408 893,705 Other equity securities 1,109 2,907 — 4,016 Total $ 1,163,893 $ 9,236 $ 6,567 $ 1,166,562 Securities Held-to-Maturity (In thousands) Amortized Cost Gross Gross Estimated Fair Value U.S. Government sponsored entities' asset-backed securities $ 58,947 $ 1,003 $ 15 $ 59,935 Obligations of states and political subdivisions 283,718 5,080 $ 1,623 287,175 Total $ 342,665 $ 6,083 $ 1,638 $ 347,110
Schedule Of Unrealized Loss On Securities	Investment securities with unrealized/unrecognized losses at December 31, 2016 , were as follows: Unrealized/unrecognized loss position for less than 12 months Unrealized/unrecognized loss position for 12 months or longer Total (In thousands) Fair value Unrealized/unrecognized Fair value Unrealized/unrecognized Fair Unrealized/unrecognized Securities Available-for-Sale Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 247,695 $ 2,305 $ 19,838 $ 162 $ 267,533 $ 2,467 U.S. Government sponsored entities' asset-backed securities 612,321 9,473 27,325 369 639,646 9,842 Total $ 860,016 $ 11,778 $ 47,163 $ 531 $ 907,179 $ 12,309 Securities Held-to-Maturity Obligations of states and political subdivision $ 134,909 $ 5,148 $ — $ — $ 134,909 $ 5,148 U.S. Government sponsored entities' asset-backed securities — — 7,564 87 7,564 87 Total $ 134,909 $ 5,148 $ 7,564 $ 87 $ 142,473 $ 5,235 Investment securities with unrealized/unrecognized losses at September 30, 2017 , were as follows: Unrealized/unrecognized loss position for less than 12 months Unrealized/unrecognized loss position for 12 months or longer Total (In thousands) Fair value Unrealized/unrecognized losses Fair value Unrealized/unrecognized Fair value Unrealized/unrecognized Securities Available-for-Sale Obligations of U.S. Treasury and other U.S. Government sponsored entities $ 24,967 $ 33 $ 243,874 $ 1,126 $ 268,841 $ 1,159 U.S. Government sponsored entities' asset-backed securities 519,984 4,815 $ 63,505 593 $ 583,489 5,408 Total $ 544,951 $ 4,848 $ 307,379 $ 1,719 $ 852,330 $ 6,567 Securities Held-to-Maturity U.S. Government sponsored entities' asset-backed securities $ — $ — $ 7,423 $ 15 $ 7,423 $ 15 Obligations of states and political subdivisions 97,120 $ 1,247 12,983 376 $ 110,103 1,623 Total $ 97,120 $ 1,247 $ 20,406 $ 391 $ 117,526 $ 1,638
Amortized Cost And Estimated Fair Value Of Investments In Debt Securities By Contractual Maturity	The amortized cost and estimated fair value of investments in debt securities at September 30, 2017 , 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 of principal repayments. Securities Available-for-Sale (In thousands) Amortized cost Fair value Tax equivalent yield Obligations of U.S. Treasury and other U.S. Government sponsored entities' obligations: Due less than one year $ 75,000 $ 74,930 1.02 % Due one through five years 195,000 193,911 1.25 % Total $ 270,000 $ 268,841 1.18 % U.S. Government sponsored entities' asset-backed securities $ 892,784 $ 893,705 2.09 % Securities Held-to-Maturity (In thousands) Amortized cost Fair value Tax equivalent yield (1) Obligations of state and political subdivisions: Due over ten years $ 283,718 $ 287,175 4.47 % Total (1) $ 283,718 $ 287,175 4.47 % U.S. Government sponsored entities' asset-backed securities $ 58,947 $ 59,935 3.20 %

Other Investment Securities (Ta

Other Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Other Investment Securities [Abstract]
Schedule Of Other Investment Securities	Other investment securities consist of stock investments in the Federal Home Loan Bank ("FHLB"), the Federal Reserve Bank ("FRB") and other equities carried at cost. The FHLB and FRB restricted stock investments are carried at their redemption value. September 30, December 31, 2016 (In thousands) FHLB stock $ 50,086 $ 50,086 FRB stock 8,225 8,225 Other equity investments carried at cost 3,500 3,500 Total other investment securities $ 61,811 $ 61,811

Share Based Compensation Shar35

Share Based Compensation Share Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	A summary of changes in the common shares subject to nonvested PBRSUs for the nine months ended September 30, 2017 follows: Common shares subject to PBRSUs Nonvested at January 1, 2017 85,425 Granted 45,788 Vested 9,674 Forfeited 150 Adjustment for performance conditions of PBRSUs (1) (1,802 ) Nonvested at September 30, 2017 119,587
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]	The following table details expected additional share-based compensation expense related to PBRSUs currently outstanding: (In thousands) Three months ending December 31, 2017 $ 711 2018 2,509 2019 1,867 2020 845 2021 141 Total $ 6,073

Pension Plan (Tables)

Pension Plan (Tables)	9 Months Ended
	Sep. 30, 2017
Defined Benefit Plan [Abstract]
Components Of Net Periodic Benefit Expense	The following table shows the components of net periodic benefit income: Three Months Ended Nine Months Ended (In thousands) 2017 2016 2017 2016 Service cost $ 1,317 $ 1,264 $ 3,951 $ 3,792 Interest cost 1,271 1,217 3,813 3,651 Expected return on plan assets (2,863 ) (2,737 ) (8,589 ) (8,211 ) Amortization of prior service cost — — — — Recognized net actuarial loss 144 193 432 579 Net periodic benefit income $ (131 ) $ (63 ) $ (393 ) $ (189 )

Loan Servicing (Tables)

Loan Servicing (Tables)	9 Months Ended
	Sep. 30, 2017
Transfers and Servicing of Financial Assets [Abstract]
Activity For MSRs And Related Valuation Allowance	Activity for MSRs and the related valuation allowance follows: Three Months Ended Nine Months Ended (In thousands) 2017 2016 2017 2016 Mortgage servicing rights: Carrying amount, net, beginning of period $ 9,476 $ 8,880 $ 9,266 $ 9,008 Additions 559 747 1,434 1,618 Amortization (448 ) (522 ) (1,213 ) (1,312 ) Changes in valuation allowance (108 ) (360 ) (8 ) (569 ) Carrying amount, net, end of period $ 9,479 $ 8,745 $ 9,479 $ 8,745 Valuation allowance: Beginning of period $ 635 $ 751 $ 735 $ 542 Changes in valuation allowance 108 360 8 569 End of period $ 743 $ 1,111 $ 743 $ 1,111

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
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 September 30, 2017 using: (In thousands) Level 1 Level 2 Level 3 Balance at September 30, 2017 Assets Investment securities: Obligations of U.S. Treasury and other U.S. Government sponsored entities $ — $ 268,841 $ — $ 268,841 U.S. Government sponsored entities’ asset-backed securities — 893,705 — 893,705 Equity securities 3,521 — 495 4,016 Mortgage loans held for sale — 11,396 — 11,396 Mortgage IRLCs — 98 — 98 Liabilities Fair value swap $ — $ — $ 226 $ 226 Fair Value Measurements at December 31, 2016 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2016 Assets Investment securities: Obligations of U.S. Treasury and other U.S. Government sponsored entities $ — $ 267,533 $ — $ 267,533 U.S. Government sponsored entities’ asset-backed securities — 987,172 — 987,172 Equity securities 2,644 — 790 3,434 Mortgage loans held for sale — 10,413 — 10,413 Mortgage IRLCs — 124 — 124 Liabilities Fair value swap $ — $ — $ 226 $ 226
Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis	The tables below are a reconciliation of the beginning and ending balances of the Level 3 inputs for the three and nine months ended September 30, 2017 and 2016 , for financial instruments measured on a recurring basis and classified as Level 3: Level 3 Fair Value Measurements Three months ended September 30, 2017 and 2016 (In thousands) Equity Securities Fair value swap Balance at July 1, 2017 $ 458 $ (226 ) Total gains/(losses) Included in other comprehensive income 37 — Balance at September 30, 2017 $ 495 $ (226 ) Balance at July 1, 2016 $ 821 $ (226 ) Total gains/(losses) Included in other comprehensive income (42 ) — Balance at September 30, 2016 $ 779 $ (226 ) Level 3 Fair Value Measurements Nine months ended September 30, 2017 and 2016 (In thousands) Equity Securities Fair value swap Balance at January 1, 2017 $ 790 $ (226 ) Total gains/(losses) Transfers out of Level 3 (1) (346 ) — Included in other comprehensive income 51 — Balance at September 30, 2017 $ 495 $ (226 ) Balance at January 1, 2016 $ 769 $ (226 ) Total gains/(losses) Included in other comprehensive income 10 — Balance at September 30, 2016 $ 779 $ (226 ) (1) Transfered from Level 3 to Level 1 as the result of a quoted market price becoming available.
Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis	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. 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 to the property's value subsequent to the initial measurement. Fair Value Measurements at September 30, 2017 using: (In thousands) Level 1 Level 2 Level 3 Balance at September 30, 2017 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 6,147 $ 6,147 Construction real estate — — 127 127 Residential real estate — — 863 863 Total impaired loans recorded at fair value $ — $ — $ 7,137 $ 7,137 Mortgage servicing rights $ — $ 7,110 $ — $ 7,110 OREO: Commercial real estate — — 2,457 2,457 Construction real estate — — 3,212 3,212 Residential real estate — — 1,093 1,093 Total OREO recorded at fair value $ — $ — $ 6,762 $ 6,762 Fair Value Measurements at December 31, 2016 using: (In thousands) Level 1 Level 2 Level 3 Balance at December 31, 2016 Impaired loans recorded at fair value: Commercial real estate $ — $ — $ 3,057 $ 3,057 Construction real estate — — 541 541 Residential real estate — — 2,385 2,385 Total impaired loans recorded at fair value $ — $ — $ 5,983 $ 5,983 Mortgage servicing rights $ — $ 6,769 $ — $ 6,769 OREO: Commercial real estate — — 2,644 2,644 Construction real estate — — 3,322 3,322 Residential real estate — — 931 931 Total OREO recorded at fair value $ — $ — $ 6,897 $ 6,897
Schedule of Impaired Financing Receivables Additional Information [Line Items]
Schedule of impaired financing receivables additional info [Abstract]	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. September 30, 2017 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 7,470 $ 2,822 $ 333 $ 7,137 Remaining impaired loans 66,139 7,124 4,769 61,370 Total impaired loans $ 73,609 $ 9,946 $ 5,102 $ 68,507 December 31, 2016 (In thousands) Recorded Investment Prior Charge-Offs Specific Valuation Allowance Carrying Balance Impaired loans recorded at fair value $ 6,379 $ 3,681 $ 396 $ 5,983 Remaining impaired loans 64,047 21,262 152 63,895 Total impaired loans $ 70,426 $ 24,943 $ 548 $ 69,878
Qualitative Information about Level 3 Fair Value Measurements Measured on Non-Recurring Basis	The following tables present qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2017 and December 31, 2016 : September 30, 2017 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 6,147 Sales comparison approach Adj to comparables 0.0% - 102.0% (40.1%) Income approach Capitalization rate 8.8% - 12.5% (9.4%) Cost approach Accumulated depreciation 90.1% (90.1%) Construction real estate $ 127 Sales comparison approach Adj to comparables 0.0% - 4.8% (2.4%) Residential real estate $ 863 Sales comparison approach Adj to comparables 0.1% - 33.0% (11.7%) Income approach Capitalization rate 10.5% (10.5%) Other real estate owned: Commercial real estate $ 2,457 Sales comparison approach Adj to comparables 0.0% - 68.4% (28.9%) Income approach Capitalization rate 12.0% - 13.0% (12.9%) Construction real estate $ 3,212 Sales comparison approach Adj to comparables 0.0% - 90.0% (24.4%) Bulk sale approach Discount rate 15.0% (15.0%) Residential real estate $ 1,093 Sales comparison approach Adj to comparables 1.2% - 79.7% (30.8%) Balance at December 31, 2016 (In thousands) Fair Value Valuation Technique Unobservable Input(s) Range (Weighted Average) Impaired loans: Commercial real estate $ 3,057 Sales comparison approach Adj to comparables 0.0% - 90.0% (20.2%) Income approach Capitalization rate 9.0% - 10.6% (10.1%) Cost approach Accumulated depreciation 17.0% - 18.0% (17.8%) Construction real estate $ 541 Sales comparison approach Adj to comparables 0.0% - 11.1% (1.6%) Bulk sale approach Discount rate 10.0% (10.0%) Residential real estate $ 2,385 Sales comparison approach Adj to comparables 0.3% - 110.0% (17.0%) Income approach Capitalization rate 10.0% (10.0%) Other real estate owned: Commercial real estate $ 2,644 Sales comparison approach Adj to comparables 0.0% - 68.4% (26.5%) Income approach Capitalization rate 13.0% - 14.0% (13.1%) Construction real estate $ 3,322 Sales comparison approach Adj to comparables 0.0% - 90.0% (24.7%) Bulk sale approach Discount rate 15.0% (15.0%) Residential real estate $ 931 Sales comparison approach Adj to comparables 3.2% - 79.7% (30.6%)
Fair Value, by Balance Sheet Grouping	The fair value of financial instruments at September 30, 2017 and December 31, 2016 , was as follows: September 30, 2017 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 450,352 $ 450,352 $ — $ — $ 450,352 Investment securities (1) 1,509,227 3,521 1,509,656 495 1,513,672 Accrued interest receivable - securities 4,780 — 4,780 — 4,780 Accrued interest receivable - loans 16,466 — — 16,466 16,466 Loans held for sale 11,396 — 11,396 — 11,396 Mortgage IRLCs 98 — 98 — 98 Impaired loans carried at fair value 7,137 — — 7,137 7,137 Other loans, net 5,292,014 — — 5,269,250 5,269,250 Loans receivable, net $ 5,310,645 $ — $ 11,494 $ 5,276,387 $ 5,287,881 Financial liabilities: Noninterest bearing checking accounts $ 1,568,177 $ 1,568,177 $ — $ — $ 1,568,177 Interest bearing transactions accounts 1,374,401 1,374,401 — — 1,374,401 Savings accounts 1,969,887 1,969,887 — — 1,969,887 Time deposits 1,056,570 — 1,058,886 — 1,058,886 Other 5,287 5,287 — — 5,287 Total deposits $ 5,974,322 $ 4,917,752 $ 1,058,886 $ — $ 5,976,638 Short-term borrowings $ 192,896 $ — $ 192,896 $ — $ 192,896 Long-term debt 848,992 — 859,473 — 859,473 Subordinated notes 15,000 — 12,738 — 12,738 Accrued interest payable – deposits 1,142 63 1,079 — 1,142 Accrued interest payable – debt/borrowings 1,140 2 1,438 — 1,440 Derivative financial instruments: Fair value swap $ 226 $ — $ — $ 226 $ 226 (1) Investment securities excludes the category "Other investment securities." This category consists of FHLB and FRB stock carried at their respective redemption values as it is not practical to calculate their fair values. Additional investments within "Other investment securities" are carried at their cost basis as these investments do not have a readily determinable fair value and Park does not have the ability to influence the operating or financial decisions of the investee. December 31, 2016 Fair Value Measurements (In thousands) Carrying value Level 1 Level 2 Level 3 Total fair value Financial assets: Cash and money market instruments $ 146,466 $ 146,466 $ — $ — $ 146,466 Investment securities (1) 1,517,972 2,644 1,511,377 790 1,514,811 Accrued interest receivable - securities 3,849 — 3,849 — 3,849 Accrued interest receivable - loans 14,973 — — 14,973 14,973 Loans held for sale 10,413 — 10,413 — 10,413 Mortgage IRLCs 124 — 124 — 124 Impaired loans carried at fair value 5,983 — — 5,983 5,983 Other loans, net 5,204,713 — — 5,161,919 5,161,919 Loans receivable, net $ 5,221,233 $ — $ 10,537 $ 5,167,902 $ 5,178,439 Financial liabilities: Noninterest bearing checking accounts $ 1,523,417 $ 1,523,417 $ — $ — $ 1,523,417 Interest bearing transactions accounts 1,174,448 1,174,448 — — 1,174,448 Savings accounts 1,704,920 1,704,920 — — 1,704,920 Time deposits 1,117,870 — 1,122,598 — 1,122,598 Other 1,301 1,301 — — 1,301 Total deposits $ 5,521,956 $ 4,404,086 $ 1,122,598 $ — $ 5,526,684 Short-term borrowings $ 394,795 $ — $ 394,795 $ — $ 394,795 Long-term debt 694,281 — 712,958 — 712,958 Subordinated notes 45,000 — 40,903 — 40,903 Accrued interest payable – deposits 900 82 818 — 900 Accrued interest payable – debt/borrowings 1,251 1 1,250 — 1,251 Derivative financial instruments: Fair value swap $ 226 $ — $ — $ 226 $ 226 (1) Investment securities excludes the category "Other investment securities." This category consists of FHLB and FRB stock carried at their respective redemption values as it is not practical to calculate their fair values. Additional investments within "Other investment securities" are carried at their cost basis as these investments do not have a readily determinable fair value and Park does not have the ability to influence the operating or financial decisions of the investee.

Other Comprehensive Income (L39

Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) Net of Tax (Tables)	9 Months Ended
	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Comprehensive Income (Loss) [Table Text Block]	Other comprehensive income components, net of tax, are shown in the following table for the three-month and nine-month periods ended September 30, 2017 and 2016 : (in thousands) Changes in pension plan assets and benefit obligations Unrealized gains (losses) on available for sale securities Total Beginning balance at July 1, 2017 $ (14,740 ) $ 1,028 $ (13,712 ) Other comprehensive income before reclassifications — 707 707 Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive income — 707 707 Ending balance at September 30, 2017 $ (14,740 ) $ 1,735 $ (13,005 ) Beginning balance at July 1, 2016 $ (15,351 ) $ 15,740 $ 389 Other comprehensive loss before reclassifications — (2,182 ) (2,182 ) Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive loss — (2,182 ) (2,182 ) Ending balance at September 30, 2016 $ (15,351 ) $ 13,558 $ (1,793 ) (in thousands) Changes in pension plan assets and benefit obligations Unrealized gains (losses) on available for sale securities Total Beginning balance at January 1, 2017 $ (14,740 ) $ (3,005 ) $ (17,745 ) Other comprehensive income before reclassifications — 4,740 4,740 Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive income — 4,740 4,740 Ending balance at September 30, 2017 $ (14,740 ) $ 1,735 $ (13,005 ) Beginning balance at January 1, 2016 $ (15,351 ) $ (292 ) $ (15,643 ) Other comprehensive income before reclassifications — 13,850 13,850 Amounts reclassified from accumulated other comprehensive loss — — — Net current period other comprehensive income — 13,850 13,850 Ending balance at September 30, 2016 $ (15,351 ) $ 13,558 $ (1,793 )

Investment in Qualified Affor40

Investment in Qualified Affordable Housing Investment in Qualified Affordable Housing (Tables)	9 Months Ended
	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Activity in Affordable Housing Program Obligation [Table Text Block]	The table below details the balances of Park’s affordable housing tax credit investments and related unfunded commitments as of September 30, 2017 and December 31, 2016. (in thousands) September 30, 2017 December 31, 2016 Affordable housing tax credit investments $ 54,355 $ 52,947 Unfunded commitments 21,282 14,282

Repurchase Agreement Borrowin41

Repurchase Agreement Borrowings Repurchase Agreement Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Transfers and Servicing [Abstract]
Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table Text Block]	The table below shows the remaining contractual maturity of repurchase agreements by collateral pledged at September 30, 2017 and December 31, 2016 : September 30, 2017 (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 $ 191,792 $ — $ 300,000 $ 1,104 $ 492,896 December 31, 2016 (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 $ 208,691 $ — $ — $ 301,104 $ 509,795

Loans (Narrative) (Details)

Loans (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Deferred Income	$ 12,000,000		$ 12,000,000		$ 11,100,000
Troubled Debt Restructuring, Classification removed		$ 335,000	0	$ 2,000,000
Partial Charge-Offs On Impaired Loans			9,946,000		24,943,000
Impaired Financing Receivable, Related Allowance	5,102,000		5,102,000		548,000
Recorded investment, related to loans	18,000,000		18,000,000		2,100,000
Troubled Debt Restructuring Included In Nonaccrual Loans	42,100,000		42,100,000		46,900,000
TDRs included in accruing loan totals	19,500,000		19,500,000		18,200,000
Nonaccrual Trouble Debt Restructuring Current	35,600,000		35,600,000		38,000,000
Commitments to lend additional funds to borrowers whose terms had been modified in a TDR	500,000		500,000		700,000
Specific reserves related to troubled debt restructuring	800,000		800,000		200,000
Additional Specific Reserves Related To Troubled Debt Restructuring	0	0	290,000	975,000
Financing Receivable, Modifications, Recorded Investment, During Period	4,938,000	12,422,000	10,765,000	18,779,000
Loan Modifications on Nonacrrual status	500,000	7,600,000	$ 3,000,000	8,500,000
Loan past due period before entering default status			30 days
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	825,000	3,869,000	$ 1,088,000	3,951,000
Deposit Liabilities Reclassified as Loans Receivable	1,800,000		1,800,000		2,900,000
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Partial Charge-Offs On Impaired Loans			7,500,000		24,700,000
Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Partial Charge-Offs On Impaired Loans			2,400,000		200,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,455,000	1,777,000	2,320,000	5,118,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	72,000	808,000	248,000	808,000
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	0		0		0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	320,000		320,000		$ 309,000
Accruing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,061,000	246,000	3,608,000	3,214,000
Loans modified during period	0	14,000	2,000	14,000
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	974,000		1,525,000	2,812,000
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,877,000	12,176,000	7,157,000	15,565,000
Loans modified during period		3,900,000	1,100,000	3,900,000
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	481,000	1,777,000	795,000	2,306,000
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	3,100,000	1,300,000	6,700,000	5,100,000
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 918,000	$ 425,000	$ 1,000,000	$ 437,000

Loans (Composition Of Loan Port

Loans (Composition Of Loan Portfolio By Class Of Loan) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Recorded Investment		$ 73,609	$ 77,998	$ 73,609	$ 77,998	$ 70,426
Loan balance		5,365,877		5,365,877		5,271,857
Accrued interest receivable		21,246		21,246		18,822
Recorded Investment		5,382,343		5,382,343		5,286,830
Impaired Financing Receivable, Average Recorded Investment		72,580	84,736	68,953	81,191
Impaired Financing Receivable, Interest Income, Cash Basis Method		654	767	1,902	4,011
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Recorded Investment		1,460	4,377	1,460	4,377
Loan balance		139,210		139,210		135,343
Accrued interest receivable		462		462		398
Recorded Investment		139,672		139,672		135,741
Impaired Financing Receivable, Average Recorded Investment		1,554	5,643	1,830	6,244
Impaired Financing Receivable, Interest Income, Cash Basis Method		18	16	49	44
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Recorded Investment		29,848	23,856	29,848	23,856
Impaired Financing Receivable, Average Recorded Investment		28,412	26,679	23,770	28,217
Impaired Financing Receivable, Interest Income, Cash Basis Method		398	194	738	740
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance		47,629		47,629		48,699
Accrued interest receivable		109		109		106
Recorded Investment		47,738		47,738		48,805
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance		4,209		4,209		4,903
Accrued interest receivable		11		11		17
Recorded Investment		4,220		4,220		4,920
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Recorded Investment		19,298	23,700	19,298	23,700
Loan balance		391,502		391,502		406,687
Accrued interest receivable		959		959		940
Recorded Investment		392,461		392,461		407,627
Impaired Financing Receivable, Average Recorded Investment		20,365	24,422	20,876	24,618
Impaired Financing Receivable, Interest Income, Cash Basis Method		46	314	452	2,619
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance		1,135,289		1,135,289		1,169,495
Accrued interest receivable		1,469		1,469		1,459
Recorded Investment		1,136,758		1,136,758		1,170,954
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance		206,665		206,665		212,441
Accrued interest receivable		896		896		853
Recorded Investment		207,561		207,561		213,294
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance		19,131		19,131		19,874
Accrued interest receivable		54		54		67
Recorded Investment		19,185		19,185		19,941
Loans Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Accrued interest receivable		16,466		16,466		14,973
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance	[1]	1,025,057		1,025,057		994,619
Accrued interest receivable	[1]	4,581		4,581		3,558
Recorded Investment	[1]	1,029,638		1,029,638		998,177
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Recorded Investment		22,995	26,065	22,995	26,065
Loan balance	[1]	1,155,662		1,155,662		1,155,703
Accrued interest receivable	[1]	4,464		4,464		4,161
Recorded Investment	[1]	1,160,126		1,160,126		1,159,864
Impaired Financing Receivable, Average Recorded Investment		22,241	27,982	22,470	22,108
Impaired Financing Receivable, Interest Income, Cash Basis Method		192	243	663	608
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Recorded Investment		8		8
Loan balance		1,238,191		1,238,191		1,120,850
Accrued interest receivable		3,409		3,409		3,385
Recorded Investment		1,241,600		1,241,600		1,124,235
Impaired Financing Receivable, Average Recorded Investment		8	$ 10	7	$ 4
Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan balance		3,332		3,332		3,243
Accrued interest receivable		52		52		29
Recorded Investment		$ 3,384		$ 3,384		$ 3,272
[1]	Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.

Loans (Recorded Investment In N

Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	$ 90,568	$ 87,822
Accruing restructured loans	19,503	18,228
Loans past due 90 days or more and accruing	2,037	2,138
Total nonperforming loans	112,108	108,188
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	29,141	20,057
Accruing restructured loans	737	600
Loans past due 90 days or more and accruing	0	15
Total nonperforming loans	29,878	20,672
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,096	1,833
Accruing restructured loans	364	393
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	1,460	2,226
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	8
Accruing restructured loans	84	104
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	92	104
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	57	61
Accruing restructured loans	0	95
Loans past due 90 days or more and accruing	0	12
Total nonperforming loans	57	168
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	19,071	23,013
Accruing restructured loans	227	89
Loans past due 90 days or more and accruing	0
Total nonperforming loans	19,298	23,102
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	17,860	18,313
Accruing restructured loans	10,599	9,612
Loans past due 90 days or more and accruing	882	887
Total nonperforming loans	29,341	28,812
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,514	1,783
Accruing restructured loans	1,094	673
Loans past due 90 days or more and accruing	0	25
Total nonperforming loans	2,608	2,481
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	778	644
Accruing restructured loans	556	609
Loans past due 90 days or more and accruing	0	60
Total nonperforming loans	1,334	1,313
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	17,889	19,169
Accruing restructured loans	5,106	5,305
Loans past due 90 days or more and accruing	0
Total nonperforming loans	22,995	24,474
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	3,154	2,949
Accruing restructured loans	736	748
Loans past due 90 days or more and accruing	1,155	1,139
Total nonperforming loans	$ 5,045	$ 4,836

Loans (Loans Individually And C

Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 5,102	$ 548
Nonaccrual and accruing restructured loans	110,071	106,050
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	73,609	70,426
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	36,462	35,624
Partial Charge-Offs On Impaired Loans	9,946	24,943
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	29,878	20,657
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	29,848	20,624
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	30	33
Construction Real Estate Commercial [Domain]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,460	2,226
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	1,460	2,226
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	0	0
Construction Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	92	104
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	92	104
Construction Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	57	156
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	57	156
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	19,298	23,102
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	19,298	23,102
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	0	0
Residential Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	28,459	27,925
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	28,459	27,925
Residential Real Estate - HELOC [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,608	2,456
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	2,608	2,456
Residential Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,334	1,253
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	1,334	1,253
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	320	309
Nonaccrual and accruing restructured loans	22,995	24,474
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	22,995	24,474
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	0	0
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	8	0
Nonaccrual and accruing restructured loans	3,890	3,697
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	8
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	3,882	3,697
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Partial Charge-Offs On Impaired Loans	$ 7,500	$ 24,700

Loans (Loans Individually Evalu

Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 83,496		$ 83,496		$ 95,358
Recorded investment	73,609	$ 77,998	73,609	$ 77,998	70,426
Allowance for loan losses allocated	5,102		5,102		548
Impaired Financing Receivable, Average Recorded Investment	72,580	84,736	68,953	81,191
Impaired Financing Receivable, Interest Income, Cash Basis Method	654	767	1,902	4,011
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	29,848	23,856	29,848	23,856
Impaired Financing Receivable, Average Recorded Investment	28,412	26,679	23,770	28,217
Impaired Financing Receivable, Interest Income, Cash Basis Method	398	194	738	740
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	22,233		22,233		41,075
Recorded investment	16,980		16,980		19,965
Allowance for loan losses allocated	0		0		0
Commercial Financial And Agricultural [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	14,735		14,735		810
Recorded investment	12,868		12,868		659
Allowance for loan losses allocated	4,761		4,761		152
Construction Real Estate Commercial [Domain]
Financing Receivable, Impaired [Line Items]
Recorded investment	1,460	4,377	1,460	4,377
Impaired Financing Receivable, Average Recorded Investment	1,554	5,643	1,830	6,244
Impaired Financing Receivable, Interest Income, Cash Basis Method	18	16	49	44
Construction Real Estate Commercial [Domain] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	2,923		2,923		3,662
Recorded investment	1,460		1,460		2,226
Allowance for loan losses allocated	0		0		0
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	19,298	23,700	19,298	23,700
Impaired Financing Receivable, Average Recorded Investment	20,365	24,422	20,876	24,618
Impaired Financing Receivable, Interest Income, Cash Basis Method	46	314	452	2,619
Residential Real Estate - Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	19,393		19,393		24,409
Recorded investment	19,009		19,009		22,687
Allowance for loan losses allocated	0		0		0
Residential Real Estate - Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	289		289		427
Recorded investment	289		289		415
Allowance for loan losses allocated	13		13		87
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	22,995	26,065	22,995	26,065
Impaired Financing Receivable, Average Recorded Investment	22,241	27,982	22,470	22,108
Impaired Financing Receivable, Interest Income, Cash Basis Method	192	243	663	608
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	18,558		18,558		23,961
Recorded investment	18,158		18,158		23,474
Allowance for loan losses allocated	0		0		0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,357		5,357		1,014
Recorded investment	4,837		4,837		1,000
Allowance for loan losses allocated	320		320		$ 309
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	8		8
Impaired Financing Receivable, Average Recorded Investment	8	$ 10	7	$ 4
Consumer [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	8		8
Recorded investment	8		8
Allowance for loan losses allocated	$ 8		$ 8

Loans (Average Recorded Investm

Loans (Average Recorded Investment And Interest Income Recognized On Loans Individually Evaluated For Impairment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 73,609	$ 77,998	$ 73,609	$ 77,998	$ 70,426
Average recorded investment	72,580	84,736	68,953	81,191
Interest income recognized	654	767	1,902	4,011
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	29,848	23,856	29,848	23,856
Average recorded investment	28,412	26,679	23,770	28,217
Interest income recognized	398	194	738	740
Construction Real Estate Commercial [Domain]
Financing Receivable, Impaired [Line Items]
Recorded investment	1,460	4,377	1,460	4,377
Average recorded investment	1,554	5,643	1,830	6,244
Interest income recognized	18	16	49	44
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	19,298	23,700	19,298	23,700
Average recorded investment	20,365	24,422	20,876	24,618
Interest income recognized	46	314	452	2,619
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	22,995	26,065	22,995	26,065
Average recorded investment	22,241	27,982	22,470	22,108
Interest income recognized	192	243	663	608
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	8		8
Average recorded investment	$ 8	$ 10	$ 7	$ 4

Loans (Aging Of Recorded Invest

Loans (Aging Of Recorded Investment In Past Due Loans) (Details) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2017USD ($)contracts		Sep. 30, 2016USD ($)contracts	Sep. 30, 2017USD ($)contracts		Sep. 30, 2016USD ($)contracts	Dec. 31, 2016USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		139		115	325		309
Accruing loans past due 30-89 days		$ 22,856			$ 22,856			$ 26,591
Past due nonaccrual loans and loans past due 90 days or more and accruing		28,240	[1]		28,240	[1]		24,050	[2]
Total loans past due		51,096			51,096			50,641
Total current		5,331,247			5,331,247			5,236,189
Recorded Investment		5,382,343			5,382,343			5,286,830
Loans past due 90 days or more and accruing		2,037			2,037			2,138
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments		64,400			64,400			65,900
Financing Receivable, Modifications, Recorded Investment, During Period		$ 4,938		$ 12,422	$ 10,765		$ 18,779
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		0		1	0		2
Past due nonaccrual loans and loans past due 90 days or more and accruing	[2]							541
Total loans past due								541
Total current		$ 139,672			$ 139,672			135,200
Recorded Investment		139,672			139,672			135,741
Loans past due 90 days or more and accruing		$ 0			0			0
Financing Receivable, Modifications, Recorded Investment, During Period				$ 947	$ 0		$ 1,144
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		14		12	25		29
Accruing loans past due 30-89 days		$ 70			$ 70			371
Past due nonaccrual loans and loans past due 90 days or more and accruing		10,527	[1]		10,527	[1]		4,113	[2]
Total loans past due		10,597			10,597			4,484
Total current		1,019,041			1,019,041			993,693
Loans past due 90 days or more and accruing		0			0			15
Financing Receivable, Modifications, Recorded Investment, During Period		$ 1,415		$ 6,603	$ 4,169		$ 7,344
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		0		0	1		0
Accruing loans past due 30-89 days		$ 213			$ 213			559
Total loans past due		213			213			559
Total current		47,525			47,525			48,246
Recorded Investment		47,738			47,738			48,805
Loans past due 90 days or more and accruing		$ 0			0			0
Financing Receivable, Modifications, Recorded Investment, During Period					$ 8
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		0		0	0		1
Accruing loans past due 30-89 days		$ 11			$ 11			223
Past due nonaccrual loans and loans past due 90 days or more and accruing		48	[1]		48	[1]		64	[2]
Total loans past due		59			59			287
Total current		4,161			4,161			4,633
Recorded Investment		4,220			4,220			4,920
Loans past due 90 days or more and accruing		$ 0			0			12
Financing Receivable, Modifications, Recorded Investment, During Period					$ 0		$ 9
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		10		4	15		7
Accruing loans past due 30-89 days								330
Past due nonaccrual loans and loans past due 90 days or more and accruing		$ 1,345	[1]		$ 1,345	[1]		3,631	[2]
Total loans past due		1,345			1,345			3,961
Total current		391,116			391,116			403,666
Recorded Investment		392,461			392,461			407,627
Loans past due 90 days or more and accruing		0			0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 498		$ 225	$ 702		$ 918
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		5		14	24		23
Accruing loans past due 30-89 days		$ 11,305			$ 11,305			10,854
Past due nonaccrual loans and loans past due 90 days or more and accruing		9,354	[1]		9,354	[1]		9,769	[2]
Total loans past due		20,659			20,659			20,623
Total current		1,116,099			1,116,099			1,150,331
Recorded Investment		1,136,758			1,136,758			1,170,954
Loans past due 90 days or more and accruing		882			882			887
Financing Receivable, Modifications, Recorded Investment, During Period		$ 417		$ 1,173	$ 1,669		$ 1,809
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		4		2	16		10
Accruing loans past due 30-89 days		$ 400			$ 400			970
Past due nonaccrual loans and loans past due 90 days or more and accruing		917	[1]		917	[1]		1,020	[2]
Total loans past due		1,317			1,317			1,990
Total current		206,244			206,244			211,304
Recorded Investment		207,561			207,561			213,294
Loans past due 90 days or more and accruing		0			0			25
Financing Receivable, Modifications, Recorded Investment, During Period		168		$ 91	529		$ 201
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days		349			349			350
Past due nonaccrual loans and loans past due 90 days or more and accruing		261	[1]		261	[1]		319	[2]
Total loans past due		610			610			669
Total current		18,575			18,575			19,272
Recorded Investment		19,185			19,185			19,941
Loans past due 90 days or more and accruing		0			0			60
Financing Receivable, Modifications, Recorded Investment, During Period		151		$ 37	216		$ 79
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment	[3]	$ 1,029,638			$ 1,029,638			998,177
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		3		6	9		10
Accruing loans past due 30-89 days		$ 82			$ 82			355
Past due nonaccrual loans and loans past due 90 days or more and accruing		3,455	[1]		3,455	[1]		2,499	[2]
Total loans past due		3,537			3,537			2,854
Total current		1,156,589			1,156,589			1,157,010
Recorded Investment	[3]	1,160,126			1,160,126			1,159,864
Loans past due 90 days or more and accruing		0			0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 1,455		$ 1,777	$ 2,320		$ 5,118
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		99		74	228		223
Accruing loans past due 30-89 days		$ 10,426			$ 10,426			12,579
Past due nonaccrual loans and loans past due 90 days or more and accruing		2,333	[1]		2,333	[1]		2,094	[2]
Total loans past due		12,759			12,759			14,673
Total current		1,228,841			1,228,841			1,109,562
Recorded Investment		1,241,600			1,241,600			1,124,235
Loans past due 90 days or more and accruing		1,155			1,155			1,139
Financing Receivable, Modifications, Recorded Investment, During Period		834		$ 1,569	1,152		$ 2,157
Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days		0			0			0
Past due nonaccrual loans and loans past due 90 days or more and accruing		0	[1]		0	[1]		0	[2]
Total loans past due		0			0			0
Total current		3,384			3,384			3,272
Recorded Investment		$ 3,384			$ 3,384			$ 3,272
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		4		2	7		4
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		$ 2,061		$ 246	$ 3,608		$ 3,214
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period					0
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		400		152	400		102
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		0		0	0		0
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		0		0	0		0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		144			144
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		211		0	746		96
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		123		0	478		17
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		110		33	175		72
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		974			1,525		2,812
Accruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		99		61	140		115
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		2,877		12,176	7,157		15,565
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period				947	0		1,144
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		1,015		6,451	3,769		7,242
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period					8
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period					0		9
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		354		225	558		918
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		206		1,173	923		1,713
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		45		91	51		184
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		41		4	41		7
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		481		1,777	795		2,306
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		$ 735		$ 1,508	$ 1,012		$ 2,042
[1]	1) Includes $2.0 million of loans past due 90 days or more and accruing. The remaining are past due nonaccrual loans.(2) Includes $64.4 million of nonaccrual loans which are current in regards to contractual principal and interest payments
[2]	1) Includes $2.1 million of loans past due 90 days or more and accruing. The remaining are past due nonaccrual loans.(2) Includes $65.9 million of nonaccrual loans which are current in regards to contractual principal and interest payments.
[3]	Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.

Loans (Recorded Investment By L

Loans (Recorded Investment By Loan Grade) (Details) - USD ($) $ in Thousands		Sep. 30, 2017		Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		$ 5,382,343		$ 5,286,830
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		139,672		135,741
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		392,461		407,627
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment	[1]	1,160,126		1,159,864
Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		3,384		3,272
5 Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		11,740		14,716
5 Rated [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment				287
5 Rated [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		395		1,055
5 Rated [Member] | Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		2,981	[2]	5,826	[3]
5 Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		8,364	[2]	7,548	[3]
5 Rated [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		0		0
6 Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		514		432
6 Rated [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		114		118
6 Rated [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		5		124
6 Rated [Member] | Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment	[2]	395
6 Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment	[3]			190
6 Rated [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		0		0
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		73,631		70,459
Impaired [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		1,460		2,226
Impaired [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		19,298		23,102
Impaired [Member] | Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		29,878	[2]	20,657	[3]
Impaired [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		22,995	[2]	24,474	[3]
Impaired [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		0		0
Pass Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		2,639,396		2,619,074
Pass Rated [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		138,098		133,110
Pass Rated [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		372,763		383,346
Pass Rated [Member] | Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		996,384	[2]	971,694	[3]
Pass Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		1,128,767	[2]	1,127,652	[3]
Pass Rated [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loan balance, recorded investment		3,384		3,272
Recorded Investment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		2,725,281		2,704,681
Recorded Investment [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		139,672		135,741
Recorded Investment [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		392,461		407,627
Recorded Investment [Member] | Commercial, Financial, and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		1,029,638	[2]	998,177	[3]
Recorded Investment [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		1,160,126	[2]	1,159,864	[3]
Recorded Investment [Member] | Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment		$ 3,384		$ 3,272
[1]	Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.
[2]	* Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.
[3]	* Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.

Loans (TDR Number Of Contracts

Loans (TDR Number Of Contracts Modified And Recorded Investment) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)contracts	Sep. 30, 2016USD ($)contracts	Sep. 30, 2017USD ($)contracts	Sep. 30, 2016USD ($)contracts
Financing Receivable, Recorded Investment [Line Items]
Additional Specific Reserves Related To Troubled Debt Restructuring	$ 0	$ 0	$ 290	$ 975
Troubled Debt Restructuring, Classification removed		$ 335	$ 0	$ 2,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	44	80	58	88
Number of Contracts | contracts	139	115	325	309
Total Recorded Investment	$ 4,938	$ 12,422	$ 10,765	$ 18,779
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 825	$ 3,869	$ 1,088	$ 3,951
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	1	0
Total Recorded Investment			$ 8
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	1	5	1	5
Number of Contracts | contracts	14	12	25	29
Total Recorded Investment	$ 1,415	$ 6,603	$ 4,169	$ 7,344
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 20	$ 129	$ 20	$ 129
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	1	3	1	4
Number of Contracts | contracts	10	4	15	7
Total Recorded Investment	$ 498	$ 225	$ 702	$ 918
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 17	$ 679	$ 17	$ 709
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	6	13	6	13
Number of Contracts | contracts	5	14	24	23
Total Recorded Investment	$ 417	$ 1,173	$ 1,669	$ 1,809
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 427	$ 1,687	$ 426	$ 1,687
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	0	1
Total Recorded Investment			$ 0	$ 9
Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	$ 151	$ 37	$ 216	$ 79
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	2	0	3	0
Number of Contracts | contracts	4	2	16	10
Total Recorded Investment	$ 168	$ 91	$ 529	$ 201
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 27		$ 32
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	0	0	0	0
Number of Contracts | contracts	0	1	0	2
Total Recorded Investment		$ 947	$ 0	$ 1,144
Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	33	53	45	60
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 262	$ 559	$ 345	$ 611
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 0	$ 0	$ 0	$ 0
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 0	$ 0	$ 0	$ 0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	1	4	2	4
Number of Contracts | contracts	3	6	9	10
Total Recorded Investment	$ 1,455	$ 1,777	$ 2,320	$ 5,118
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 72	$ 808	$ 248	$ 808
Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	0	2	0	2
Number of Contracts | contracts	4	2	7	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 0	$ 7	$ 0	$ 7
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	99	74	228	223
Total Recorded Investment	$ 834	$ 1,569	$ 1,152	$ 2,157
Finance Leases Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts, During Period | contracts	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 0	$ 0	$ 0	$ 0
Accruing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	2,061	246	3,608	3,214
Accruing [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	0	0	0	0
Accruing [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	400	152	400	102
Accruing [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	144		144
Accruing [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	211	0	746	96
Accruing [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	0	0	0	0
Accruing [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	110	33	175	72
Accruing [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	123	0	478	17
Accruing [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment			0
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	974		1,525	2,812
Accruing [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	99	61	140	115
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	2,877	12,176	7,157	15,565
Nonaccrual [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment			8
Nonaccrual [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	1,015	6,451	3,769	7,242
Nonaccrual [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	354	225	558	918
Nonaccrual [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	206	1,173	923	1,713
Nonaccrual [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment			0	9
Nonaccrual [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	41	4	41	7
Nonaccrual [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	45	91	51	184
Nonaccrual [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment		947	0	1,144
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	481	1,777	795	2,306
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	$ 735	$ 1,508	$ 1,012	$ 2,042

Loans (Recorded Investment In F

Loans (Recorded Investment In Financing Receivable Modified As TDR Within 12 Months) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)contracts	Sep. 30, 2016USD ($)contracts	Sep. 30, 2017USD ($)contracts	Sep. 30, 2016USD ($)contracts	Dec. 31, 2016USD ($)
Financing Receivable, Recorded Investment [Line Items]
Troubled Debt Restructuring, Classification removed		$ 335	$ 0	$ 2,000
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	139	115	325	309
Number of Contracts | contracts	44	80	58	88
Recorded Investment	$ 825	$ 3,869	$ 1,088	$ 3,951
Financing Receivable, Modifications, Recorded Investment, During Period	4,938	$ 12,422	10,765	$ 18,779
Troubled Debt Restructuring Included In Nonaccrual Loans	42,100		42,100		$ 46,900
Nonaccrual Trouble Debt Restructuring Current	$ 35,600		$ 35,600		$ 38,000
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	0	0	0	1
Financing Receivable, Modifications, Recorded Investment, During Period			$ 0	$ 9
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	14	12	25	29
Number of Contracts | contracts	1	5	1	5
Recorded Investment	$ 20	$ 129	$ 20	$ 129
Financing Receivable, Modifications, Recorded Investment, During Period	$ 1,415	$ 6,603	$ 4,169	$ 7,344
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	10	4	15	7
Number of Contracts | contracts	1	3	1	4
Recorded Investment	$ 17	$ 679	$ 17	$ 709
Financing Receivable, Modifications, Recorded Investment, During Period	$ 498	$ 225	$ 702	$ 918
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	5	14	24	23
Number of Contracts | contracts	6	13	6	13
Recorded Investment	$ 427	$ 1,687	$ 426	$ 1,687
Financing Receivable, Modifications, Recorded Investment, During Period	$ 417	$ 1,173	$ 1,669	$ 1,809
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	4	2	16	10
Number of Contracts | contracts	2	0	3	0
Recorded Investment	$ 27		$ 32
Financing Receivable, Modifications, Recorded Investment, During Period	$ 168	$ 91	$ 529	$ 201
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	0	0	1	0
Financing Receivable, Modifications, Recorded Investment, During Period			$ 8
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 151	$ 37	$ 216	$ 79
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	0	1	0	2
Number of Contracts | contracts	0	0	0	0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 947	$ 0	$ 1,144
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	99	74	228	223
Financing Receivable, Modifications, Recorded Investment, During Period	$ 834	$ 1,569	$ 1,152	$ 2,157
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	3	6	9	10
Number of Contracts | contracts	1	4	2	4
Recorded Investment	$ 72	$ 808	$ 248	$ 808
Financing Receivable, Modifications, Recorded Investment, During Period	$ 1,455	$ 1,777	$ 2,320	$ 5,118
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts	4	2	7	4
Number of Contracts | contracts	0	2	0	2
Recorded Investment	$ 0	$ 7	$ 0	$ 7
Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	33	53	45	60
Recorded Investment	$ 262	$ 559	$ 345	$ 611
Finance Leases Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,061	246	3,608	3,214
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	0	0	0
Accruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	400	152	400	102
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	144		144
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	211	0	746	96
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	123	0	478	17
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0	0	0	0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	110	33	175	72
Accruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0
Accruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	99	61	140	115
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	974		1,525	2,812
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,877	12,176	7,157	15,565
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			0	9
Nonaccruing Financing Receivable Modifications [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,015	6,451	3,769	7,242
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	354	225	558	918
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	206	1,173	923	1,713
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	45	91	51	184
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			8
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	41	4	41	7
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		947	0	1,144
Nonaccruing Financing Receivable Modifications [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	735	1,508	1,012	2,042
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 481	$ 1,777	$ 795	$ 2,306

Allowance For Loan Losses (Acti

Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	$ 4,377	$ 4,140	$ 11,131	$ 11,960
Financing Receivable, Allowance for Credit Losses, Recovery	2,504	6,369	6,999	12,847
Financing Receivables Allowance For Credit Losses Net Charge Offs	1,873	(2,229)	4,132	(887)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	53,822	58,699	50,624	56,494
Ending balance	55,232	53,562	55,232	53,562
Provision for Loan, Lease, and Other Losses	3,283	(7,366)	8,740	(3,819)
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	626	457	1,283	1,601
Financing Receivable, Allowance for Credit Losses, Recovery	115	246	647	889
Financing Receivables Allowance For Credit Losses Net Charge Offs	511	211	636	712
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,746	16,478	13,434	13,694
Ending balance	17,977	16,270	17,977	16,270
Provision for Loan, Lease, and Other Losses	1,742	3	5,179	3,288
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	628	4	1,050	82
Financing Receivable, Allowance for Credit Losses, Recovery	13	973	368	3,005
Financing Receivables Allowance For Credit Losses Net Charge Offs	615	(969)	682	(2,923)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,451	9,203	10,432	9,197
Ending balance	10,172	10,573	10,172	10,573
Provision for Loan, Lease, and Other Losses	336	401	422	(1,547)
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	78	1,300	105	1,318
Financing Receivable, Allowance for Credit Losses, Recovery	303	3,659	686	4,708
Financing Receivables Allowance For Credit Losses Net Charge Offs	(225)	(2,359)	(581)	(3,390)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,677	8,256	5,247	8,564
Ending balance	5,401	5,358	5,401	5,358
Provision for Loan, Lease, and Other Losses	499	(5,257)	(427)	(6,596)
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	217	293	987	1,776
Financing Receivable, Allowance for Credit Losses, Recovery	1,061	348	1,688	1,226
Financing Receivables Allowance For Credit Losses Net Charge Offs	(844)	(55)	(701)	550
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,319	13,180	10,958	13,514
Ending balance	10,085	11,328	10,085	11,328
Provision for Loan, Lease, and Other Losses	(1,078)	(1,907)	(1,574)	(1,636)
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	2,828	2,086	7,706	7,183
Financing Receivable, Allowance for Credit Losses, Recovery	1,011	1,142	3,609	3,017
Financing Receivables Allowance For Credit Losses Net Charge Offs	1,817	944	4,097	4,166
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,629	11,581	10,553	11,524
Ending balance	11,597	10,033	11,597	10,033
Provision for Loan, Lease, and Other Losses	1,785	(604)	5,141	2,675
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	1	1	1	2
Financing Receivables Allowance For Credit Losses Net Charge Offs	(1)	(1)	(1)	(2)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	1	0	1
Ending balance	0	0	0	0
Provision for Loan, Lease, and Other Losses	$ (1)	$ (2)	$ (1)	$ (3)

Allowance For Loan Losses (Comp

Allowance For Loan Losses (Composition Of The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		$ 5,102	$ 548
Allowance for loan losses collectively evaluated for impairment		50,130	50,076
Total ending allowance balance		55,232	50,624
Loans individually evaluated for impairment		73,550	70,415
Loans collectively evaluated for impairment		5,292,327	5,201,442
Total ending loan balance, net of accrued interest receivable		$ 5,365,877	$ 5,271,857
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		6.93678%	0.77824%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		0.94722%	0.96273%
Total ending allowance for loan losses balance as a percentage of loan balance		1.02932%	0.96027%
Recorded investment		$ 73,609	$ 70,426
Recorded investment collectively evaluated for impairment		5,308,734	5,216,404
Recorded Investment		5,382,343	5,286,830
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		4,761	152
Allowance for loan losses collectively evaluated for impairment		13,216	13,282
Total ending allowance balance		17,977	13,434
Loans individually evaluated for impairment		29,844	20,622
Loans collectively evaluated for impairment		995,213	973,997
Total ending loan balance, net of accrued interest receivable	[1]	$ 1,025,057	$ 994,619
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		15.95296%	0.73708%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		1.32796%	1.36366%
Total ending allowance for loan losses balance as a percentage of loan balance		1.75376%	1.35067%
Recorded investment		$ 29,848	$ 20,624
Recorded investment collectively evaluated for impairment		999,790	977,553
Recorded Investment	[1]	1,029,638	998,177
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		320	309
Allowance for loan losses collectively evaluated for impairment		9,852	10,123
Total ending allowance balance		10,172	10,432
Loans individually evaluated for impairment		22,943	24,465
Loans collectively evaluated for impairment		1,132,719	1,131,238
Total ending loan balance, net of accrued interest receivable	[1]	$ 1,155,662	$ 1,155,703
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		1.39476%	1.26303%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		0.86977%	0.89486%
Total ending allowance for loan losses balance as a percentage of loan balance		0.88019%	0.90265%
Recorded investment		$ 22,995	$ 24,474
Recorded investment collectively evaluated for impairment		1,137,131	1,135,390
Recorded Investment	[1]	1,160,126	1,159,864
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		0	0
Allowance for loan losses collectively evaluated for impairment		5,401	5,247
Total ending allowance balance		5,401	5,247
Loans individually evaluated for impairment		1,458	2,226
Loans collectively evaluated for impairment		189,590	186,719
Total ending loan balance, net of accrued interest receivable		$ 191,048	$ 188,945
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		0.00%	0.00%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		2.84878%	2.81011%
Total ending allowance for loan losses balance as a percentage of loan balance		2.82704%	2.777%
Recorded investment		$ 1,460	$ 2,226
Recorded investment collectively evaluated for impairment		190,170	187,240
Recorded Investment		191,630	189,466
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		13	87
Allowance for loan losses collectively evaluated for impairment		10,072	10,871
Total ending allowance balance		10,085	10,958
Loans individually evaluated for impairment		19,297	23,102
Loans collectively evaluated for impairment		1,733,290	1,785,395
Total ending loan balance, net of accrued interest receivable		$ 1,752,587	$ 1,808,497
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		0.06737%	0.37659%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		0.58109%	0.60888%
Total ending allowance for loan losses balance as a percentage of loan balance		0.57544%	0.60592%
Recorded investment		$ 19,298	$ 23,102
Recorded investment collectively evaluated for impairment		1,736,667	1,788,714
Recorded Investment		1,755,965	1,811,816
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		8	0
Allowance for loan losses collectively evaluated for impairment		11,589	10,553
Total ending allowance balance		11,597	10,553
Loans individually evaluated for impairment		8	0
Loans collectively evaluated for impairment		1,238,183	1,120,850
Total ending loan balance, net of accrued interest receivable		$ 1,238,191	$ 1,120,850
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		0.00%	0.00%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		0.93597%	0.94152%
Total ending allowance for loan losses balance as a percentage of loan balance		0.93661%	0.94152%
Recorded investment		$ 8	$ 0
Recorded investment collectively evaluated for impairment		1,241,592	1,124,235
Recorded Investment		1,241,600	1,124,235
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses individually evaluated for impairment		0	0
Allowance for loan losses collectively evaluated for impairment		0	0
Total ending allowance balance		0	0
Loans individually evaluated for impairment		0	0
Loans collectively evaluated for impairment		3,332	3,243
Total ending loan balance, net of accrued interest receivable		$ 3,332	$ 3,243
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment		0.00%	0.00%
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment		0.00%	0.00%
Total ending allowance for loan losses balance as a percentage of loan balance		0.00%	0.00%
Recorded investment		$ 0	$ 0
Recorded investment collectively evaluated for impairment		3,384	3,272
Recorded Investment		$ 3,384	$ 3,272
[1]	Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that are not broken out by class.

Other Real Estate Owned Other54

Other Real Estate Owned Other Real Estate Owned (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	$ 14,366	$ 13,926
Commercial Real Estate [Member]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	8,049	7,642
Construction Real Estate [Member]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	4,861	4,624
Residential Real Estate [Member]
Schedule of Assets Repossessed or Foreclosed, or loans in process of foreclosure [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	1,456	1,660
Mortgage Loans in Process of Foreclosure, Amount	$ 3,288	$ 3,250

Earnings Per Common Share (Narr

Earnings Per Common Share (Narrative) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Treasury Stock, Shares, Acquired			70,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	119,587		119,587		85,425
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	63,616	68,916	95,160	71,023
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	0	0	46,000	42,000
Treasury Stock, Shares, Acquired	20,000	0	70,000	0

Earnings Per Common Share (Summ

Earnings Per Common Share (Summary Of Computation Of Basic And Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Income available to common shareholders	$ 22,112	$ 27,449	$ 61,411	$ 66,133
Denominator for basic earnings per share (weighted average common shares outstanding)	15,287,974	15,330,791	15,299,039	15,330,802
Effect of dilutive options and warrants	63,616	68,916	95,160	71,023
Denominator for diluted earnings per share (weighted average common shares outstanding adjusted for the effect of dilutive options and warrants)	15,351,590	15,399,707	15,394,199	15,401,825
Basic earnings per common share	$ 1.45	$ 1.79	$ 4.01	$ 4.31
Diluted earnings per common share	$ 1.44	$ 1.78	$ 3.99	$ 4.29

Segment Information (Schedule O

Segment Information (Schedule Of Operating Results By Segment) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)segments	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segments			3
Net interest income	$ 61,551,000	$ 58,533,000	$ 180,281,000	$ 175,837,000
Provision for (recovery of) loan losses	3,283,000	(7,366,000)	8,740,000	(3,819,000)
Other income and security gains	22,089,000	20,535,000	58,847,000	56,660,000
Total other expense	49,811,000	46,756,000	145,379,000	141,961,000
Income (loss) before income taxes	30,546,000	39,678,000	85,009,000	94,355,000
Income Tax Expense (Benefit)	8,434,000	12,229,000	23,598,000	28,222,000
Net Income	22,112,000	27,449,000	61,411,000	66,133,000
Assets	7,862,695,000	7,364,092,000	7,862,695,000	7,364,092,000	$ 7,467,586,000
PNB [Member]
Segment Reporting Information [Line Items]
Net interest income	59,415,000	57,033,000	174,717,000	170,194,000
Provision for (recovery of) loan losses	3,820,000	(3,345,000)	9,114,000	(450,000)
Other income and security gains	20,367,000	19,279,000	57,257,000	55,010,000
Total other expense	45,987,000	42,327,000	133,667,000	126,418,000
Income (loss) before income taxes	29,975,000	37,330,000	89,193,000	99,236,000
Income Tax Expense (Benefit)	8,678,000	11,839,000	26,247,000	30,923,000
Net Income	21,297,000	25,491,000	62,946,000	68,313,000
Assets	7,788,248,000	7,287,923,000	7,788,248,000	7,287,923,000
GFSC [Member]
Segment Reporting Information [Line Items]
Net interest income	1,455,000	1,472,000	4,424,000	4,416,000
Provision for (recovery of) loan losses	609,000	(313,000)	1,419,000	1,658,000
Other income and security gains	18,000	(1,000)	10,000	(1,000)
Total other expense	734,000	800,000	2,295,000	3,632,000
Income (loss) before income taxes	130,000	984,000	720,000	(875,000)
Income Tax Expense (Benefit)	46,000	344,000	252,000	(305,000)
Net Income	84,000	640,000	468,000	(570,000)
Assets	33,260,000	32,759,000	33,260,000	32,759,000
SEPH [Member]
Segment Reporting Information [Line Items]
Net interest income	401,000	8,000	884,000	1,240,000
Provision for (recovery of) loan losses	(1,146,000)	(3,708,000)	(1,793,000)	(5,027,000)
Other income and security gains	411,000	1,126,000	390,000	1,272,000
Total other expense	996,000	1,789,000	3,010,000	4,525,000
Income (loss) before income taxes	962,000	3,053,000	57,000	3,014,000
Income Tax Expense (Benefit)	336,000	1,070,000	20,000	1,056,000
Net Income	626,000	1,983,000	37,000	1,958,000
Assets	25,377,000	36,938,000	25,377,000	36,938,000
All Other [Member]
Segment Reporting Information [Line Items]
Net interest income	280,000	20,000	256,000	(13,000)
Other income and security gains	1,293,000	131,000	1,190,000	379,000
Total other expense	2,094,000	1,840,000	6,407,000	7,386,000
Income (loss) before income taxes	(521,000)	(1,689,000)	(4,961,000)	(7,020,000)
Income Tax Expense (Benefit)	(626,000)	(1,024,000)	(2,921,000)	(3,452,000)
Net Income	105,000	(665,000)	(2,040,000)	(3,568,000)
Assets	$ 15,810,000	$ 6,472,000	$ 15,810,000	$ 6,472,000

Mortgage Loans Held For Sale (D

Mortgage Loans Held For Sale (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Mortgage Loans Held for Sale [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 11,396	$ 10,413
Disposal Group, Including Discontinued Operation, Mortgage Loans	11,200	10,300
Gain (Loss) on Sale of Mortgage Loans	$ 153	$ 131

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Schedule of Investments [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%
Tax Equivalent Interest Adjustment		$ 2,700,000
Investment Securities average remaining life		4 years 4 months
Other than Temporary Impairment Losses, Investments	$ 0	$ 0	$ 0
Available-for-sale Securities, Gross Realized Gains	0	$ 0	$ 0
Asset backed securities mortgage portfolio, term		15 years
Available-for-sale Securities Pledged as Collateral	933,000,000	$ 933,000,000		$ 937,000,000
U.S. Treasury And Sponsored Entities Callable Notes [Member]
Schedule of Investments [Line Items]
Available for Sale expected to be called	0	0
Available-for-sale securities	$ 268,800,000	$ 268,800,000
U.S. Treasury And Sponsored Entities Callable Notes [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Available for Sale Securities, Debt Maturities, Term		31 days
U.S. Treasury And Sponsored Entities Callable Notes [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Available for Sale Securities, Debt Maturities, Term		2 years 273 days

Investment Securities (Schedule

Investment Securities (Schedule Of Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Securities Available-for-Sale, Amortized Cost	$ 1,163,893	$ 1,262,761
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	9,236	7,687
Securities Available-for-Sale, Gross Unrealized Holding Losses	6,567	12,309
Securities Available-for-Sale, Total Fair value	1,166,562	1,258,139
Securities Held-to-Maturity, Amortized Cost	342,665	259,833
Securities Held-to-Maturity, Gross Unrecognized Holding Gains	6,083	2,074
Securities Held-to-Maturity, Gross Unrecognized Holding Losses	1,638	5,235
Securities Held-to-Maturity, Estimated Fair Value	347,110	256,672
Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Amortized Cost	270,000	270,000
Securities Available-for-Sale, Gross Unrealized Holding Losses	1,159	2,467
Securities Available-for-Sale, Total Fair value	268,841	267,533
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Amortized Cost	892,784	991,642
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	6,329	5,372
Securities Available-for-Sale, Gross Unrealized Holding Losses	5,408	9,842
Securities Available-for-Sale, Total Fair value	893,705	987,172
Securities Held-to-Maturity, Amortized Cost	58,947	71,211
Securities Held-to-Maturity, Gross Unrecognized Holding Gains	1,003	1,097
Securities Held-to-Maturity, Gross Unrecognized Holding Losses	15	87
Securities Held-to-Maturity, Estimated Fair Value	59,935	72,221
Other Equity Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Amortized Cost	1,109	1,119
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	2,907	2,315
Securities Available-for-Sale, Total Fair value	4,016	3,434
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Securities Held-to-Maturity, Amortized Cost	283,718	188,622
Securities Held-to-Maturity, Gross Unrecognized Holding Gains	5,080	977
Securities Held-to-Maturity, Gross Unrecognized Holding Losses	1,623	5,148
Securities Held-to-Maturity, Estimated Fair Value	$ 287,175	$ 184,451

Investment Securities (Schedu61

Investment Securities (Schedule Of Unrealized Loss On Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	$ 544,951	$ 860,016
Securities Available-for-Sale, Less than 12 months, Unrealized losses	4,848	11,778
Securities Available-for-Sale, 12 months or longer, Fair value	307,379	47,163
Securities Available-for-Sale, 12 months or longer, Unrealized losses	1,719	531
Securities Available-for-Sale, Fair value, Total	852,330	907,179
Securities Available-for-Sale, Unrealized losses, Total	6,567	12,309
Securities Held-to-Maturity, Less than 12 months, Fair value	97,120	134,909
Securities Held-to-Maturity, Less than 12 months, Unrealized losses	1,247	5,148
Securities Held-to-Maturity, 12 months or longer, Fair value	20,406	7,564
Securities Held-to-Maturity, 12 months or longer, Unrealized losses	391	87
Securities Held-to-Maturity, Fair value, Total	117,526	142,473
Securities Held-to-Maturity, Unrealized losses, Total	1,638	5,235
Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	24,967	247,695
Securities Available-for-Sale, Less than 12 months, Unrealized losses	33	2,305
Securities Available-for-Sale, 12 months or longer, Fair value	243,874	19,838
Securities Available-for-Sale, 12 months or longer, Unrealized losses	1,126	162
Securities Available-for-Sale, Fair value, Total	268,841	267,533
Securities Available-for-Sale, Unrealized losses, Total	1,159	2,467
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	519,984	612,321
Securities Available-for-Sale, Less than 12 months, Unrealized losses	4,815	9,473
Securities Available-for-Sale, 12 months or longer, Fair value	63,505	27,325
Securities Available-for-Sale, 12 months or longer, Unrealized losses	593	369
Securities Available-for-Sale, Fair value, Total	583,489	639,646
Securities Available-for-Sale, Unrealized losses, Total	5,408	9,842
Securities Held-to-Maturity, 12 months or longer, Fair value	7,423	7,564
Securities Held-to-Maturity, 12 months or longer, Unrealized losses	15	87
Securities Held-to-Maturity, Fair value, Total	7,423	7,564
Securities Held-to-Maturity, Unrealized losses, Total	15	87
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Securities Held-to-Maturity, Less than 12 months, Fair value	97,120	134,909
Securities Held-to-Maturity, Less than 12 months, Unrealized losses	1,247	5,148
Securities Held-to-Maturity, 12 months or longer, Fair value	12,983
Securities Held-to-Maturity, 12 months or longer, Unrealized losses	376
Securities Held-to-Maturity, Fair value, Total	110,103	134,909
Securities Held-to-Maturity, Unrealized losses, Total	$ 1,623	$ 5,148

Investment Securities (Amortize

Investment Securities (Amortized Cost And Estimated Fair Value Of Investments In Debt Securities By Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Securities Available-for-Sale, Total Fair value	$ 1,166,562	$ 1,258,139
Securities Held-to-Maturity, Amortized Cost	342,665	259,833
Securities held-to-maturity, fair value	347,110	256,672
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	283,718
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	287,175
Securities Held-to-Maturity, Amortized Cost	283,718	188,622
Securities held-to-maturity, fair value	$ 287,175	184,451
Held to Maturity Securities weighted avg yield	4.47%
Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 75,000
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	$ 74,930
Available for Sale Securities Debt Maturities next twelve months Weighted Avg Yield	1.02%
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	$ 195,000
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	$ 193,911
Available for Sale Securities Debt Maturities two through five Weighted Avg Yield	1.25%
Securities Available-for-Sale, Total, Amortized cost	$ 270,000
Securities Available-for-Sale, Total Fair value	$ 268,841	267,533
Available for Sale Securities Weighted Avg Yield	1.18%
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Total, Amortized cost	$ 892,784
Securities Available-for-Sale, Total Fair value	$ 893,705	987,172
Available for Sale Securities Weighted Avg Yield	2.09%
Securities Held-to-Maturity, Amortized Cost	$ 58,947	71,211
Securities held-to-maturity, fair value	$ 59,935	$ 72,221
Held to Maturity Securities weighted avg yield	3.20%

Other Investment Securities (Sc

Other Investment Securities (Schedule Of Other Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Federal Home Loan Bank Stock	$ 50,086	$ 50,086
Federal Reserve Bank Stock	8,225	8,225
Equity Method Investments	3,500	3,500
Other investment securities	$ 61,811	$ 61,811

Share Based Compensation Shar64

Share Based Compensation Share Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 6,073		$ 6,073
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	119,587		119,587		85,425
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			9,674
Shares Paid for Tax Withholding for Share Based Compensation			3,293
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings			6,381
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			150
Allocated Share-based Compensation Expense	$ 727	$ 398	$ 2,116	$ 1,200
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Period Increase (Decrease)			(1,802)
Expense to be paid next twelve months [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	711		$ 711
Expense to be paid Year Two [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	2,509		2,509
Expense to be paid Year Three [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	1,867		1,867
Expense to be paid Year Four [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	845		845
Expense to be paid Year Five [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 141		$ 141
2013 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	600,000		600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			45,788
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0		45,788	41,550
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		750,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	750,000		750,000
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		150,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	150,000		150,000

Pension Plan (Components Of Net

Pension Plan (Components Of Net Periodic Benefit Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1,317	$ 1,264	$ 3,951	$ 3,792
Interest cost	1,271	1,217	3,813	3,651
Expected return on plan assets	(2,863)	(2,737)	(8,589)	(8,211)
Amortization of prior service cost	0	0	0	0
Recognized net actuarial loss	144	193	432	579
Benefit expense	(131)	(63)	(393)	(189)
Pension plan contributions	$ 0	$ 0	$ 0	$ 0

Loan Servicing (Narrative) (Det

Loan Servicing (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Transfers and Servicing of Financial Assets [Abstract]
Serviced sold mortgage loans	$ 1,360,000	$ 1,310,000	$ 1,360,000	$ 1,310,000	$ 1,330,000
Serviced sold mortgage loans with recourse	3,200	4,300	3,200	4,300	4,100
Mortgage Loans Sold with Recourse, Reserve	266		266		$ 266
Servicing fees included in other service income	$ 800	$ 900	$ 2,600	$ 2,500

Loan Servicing (Activity For MS

Loan Servicing (Activity For MSRs And Related Valuation Allowance) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Servicing Asset at Amortized Value, Balance [Roll Forward]
Carrying amount, net, beginning of period	$ 9,476,000	$ 8,880,000	$ 9,266,000	$ 9,008,000
Additions	559,000	747,000	1,434,000	1,618,000
Amortization	(448,000)	(522,000)	(1,213,000)	(1,312,000)
Changes in valuation inputs & assumptions	(108,000)	(360,000)	(8,000)	(569,000)
Carrying amount, net, end of period	9,479,000	8,745,000	9,479,000	8,745,000
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Valuation allowance, beginning of period	635,000	751,000	735,000	542,000
Changes in valuation allowance	(108,000)	(360,000)	(8,000)	(569,000)
Valuation allowance, end of period	$ 743,000	$ 1,111,000	$ 743,000	$ 1,111,000

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 11,396,000		$ 11,396,000		$ 10,413,000
Impaired Financing Receivable, Carrying Value	68,507,000		$ 68,507,000		69,878,000
Discount percentage applied to real estate appraised values			15.00%
Discount percentage applied to lot development appraised values			6.00%
Partial Charge-Offs On Impaired Loans			$ 9,946,000		24,943,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5,102,000		5,102,000		548,000
Impaired Financing Receivable, Related Allowance	5,102,000		5,102,000		548,000
Impaired Loan Fair Value	7,137,000		7,137,000		5,983,000
Partial Charge-Offs On Impaired Loans carried at Fair Value			2,822,000		3,681,000
Book Value Of Impaired Loans Carried At Fair Value	7,470,000		7,470,000		6,379,000
Impaired Financing Receivable, carried at fair value, related expense	(700,000)	$ 2,900,000	(1,200,000)	$ 1,900,000
MSR recorded at lower of cost or fair value	9,479,000	8,745,000	9,479,000	8,745,000	9,266,000	$ 9,476,000	$ 8,880,000	$ 9,008,000
Mortgage Servicing Rights Fair Value	7,100,000		7,100,000		6,800,000
Valuation allowance of MSR	743,000	1,111,000	743,000	1,111,000	735,000	$ 635,000	$ 751,000	$ 542,000
MSRs recorded at cost	2,400,000		2,400,000		2,500,000
Changes due to fair value adjustments	(108,000)	(360,000)	(8,000)	(569,000)
Other Real Estate, Foreclosed Assets, and Repossessed Assets	$ 14,366,000		$ 14,366,000		$ 13,926,000
Percent of OREO held at fair value	47.06947%		47.06947%		49.52607%
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Fair Value	$ 6,800,000		$ 6,800,000		$ 6,897,000
OREO valuation adjustments	22,000	$ 233,000	367,000	$ 572,000
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Financing Receivable, Related Allowance	333,000		333,000		396,000
Financing Receivable, not collateral dependent [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Financing Receivable, Related Allowance	4,769,000		4,769,000		152,000
Commercial Real Estate Portfolio Segment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	320,000		320,000		309,000
Residential Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	$ 1,456,000		$ 1,456,000		1,660,000
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loan Fair Value					3,057,000
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loan Fair Value					$ 2,385,000
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			102.00%		90.00%
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			68.40%		68.40%
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			33.00%		110.00%
Sales Comparison Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			79.70%		79.70%
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			40.10%		20.20%
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			28.90%		26.50%
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			11.70%		17.00%
Sales Comparison Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			30.80%		30.60%
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			0.00%		0.00%
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			0.00%		0.00%
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			0.10%		0.30%
Sales Comparison Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Comparability Adjustments			1.20%		3.20%
Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			12.50%		10.60%
Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			13.00%		14.00%
Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			10.50%		10.00%
Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			9.40%		10.10%
Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			12.90%		13.10%
Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			10.50%		10.00%
Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			8.80%		9.00%
Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			12.00%		13.00%
Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Cap Rate			10.50%		10.00%
Cost Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Accumulated Depreciation			90.10%		18.00%
Cost Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Accumulated Depreciation			90.10%		17.80%
Cost Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Inputs, Accumulated Depreciation			90.10%		17.00%

Fair Value (Assets And Liabilit

Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 450,352	$ 146,466
Mortgage loans held for sale	11,396	10,413
Investment securities	1,513,672	1,514,811
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Impaired Loan Fair Value	7,137	5,983
Other Assets, Fair Value Disclosure	5,269,250	5,161,919
Loans Receivable, Fair Value Disclosure	5,287,881	5,178,439
Noninterest Bearing Deposit Liabilities Fair Value	1,568,177	1,523,417
Interest bearing transactions accounts	1,374,401	1,174,448
Savings accounts	1,969,887	1,704,920
Time deposits	1,058,886	1,122,598
Other Liabilities, Fair Value Disclosure	5,287	1,301
Deposits, Fair Value Disclosure	5,976,638	5,526,684
Short Term Borrowings Fair Value	192,896	394,795
Long-term debt	859,473	712,958
Subordinated Debt Obligations, Fair Value Disclosure	12,738	40,903
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	450,352	146,466
Mortgage IRLCs	0	0
Investment securities	3,521	2,644
Noninterest Bearing Deposit Liabilities Fair Value	1,568,177	1,523,417
Interest bearing transactions accounts	1,374,401	1,174,448
Savings accounts	1,969,887	1,704,920
Other Liabilities, Fair Value Disclosure	5,287	1,301
Deposits, Fair Value Disclosure	4,917,752	4,404,086
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs	98	124
Investment securities	1,509,656	1,511,377
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Loans Receivable, Fair Value Disclosure	11,494	10,537
Time deposits	1,058,886	1,122,598
Deposits, Fair Value Disclosure	1,058,886	1,122,598
Short Term Borrowings Fair Value	192,896	394,795
Long-term debt	859,473	712,958
Subordinated Debt Obligations, Fair Value Disclosure	12,738	40,903
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs	0	0
Investment securities	495	790
Impaired Loan Fair Value	7,137	5,983
Other Assets, Fair Value Disclosure	5,269,250	5,161,919
Loans Receivable, Fair Value Disclosure	5,276,387	5,167,902
Fair Value Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	226	226
Fair Value Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	226	226
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale	11,396	10,413
Mortgage IRLCs	98	124
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale	11,396	10,413
Mortgage IRLCs	98	124
Fair Value, Measurements, Recurring [Member] | Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	268,841	267,533
Fair Value, Measurements, Recurring [Member] | Obligations Of U.S. Treasury And Other U.S. Government Sponsored Entities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	268,841	267,533
Fair Value, Measurements, Recurring [Member] | U.S. Government Sponsored Entities' Asset-Backed Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	893,705	987,172
Fair Value, Measurements, Recurring [Member] | U.S. Government Sponsored Entities' Asset-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	893,705	987,172
Fair Value, Measurements, Recurring [Member] | Other Equity Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	4,016	3,434
Fair Value, Measurements, Recurring [Member] | Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	3,521	2,644
Fair Value, Measurements, Recurring [Member] | Other Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities	495	790
Fair Value, Measurements, Recurring [Member] | Fair Value Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	226	226
Fair Value, Measurements, Recurring [Member] | Fair Value Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap	226	226
Available-for-sale Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued interest receivable	4,780	3,849
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued interest receivable	4,780	3,849
Loans Receivable [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued interest receivable	16,466	14,973
Loans Receivable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued interest receivable	16,466	14,973
Deposits [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued Liabilities, Fair Value Disclosure	1,142	900
Deposits [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued Liabilities, Fair Value Disclosure	63	82
Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued Liabilities, Fair Value Disclosure	1,079	818
Borrowings [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued Liabilities, Fair Value Disclosure	1,440	1,251
Borrowings [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued Liabilities, Fair Value Disclosure	2	1
Borrowings [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Accrued Liabilities, Fair Value Disclosure	$ 1,438	$ 1,250

Fair Value (Reconciliation Of L

Fair Value (Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis) (Details) - Fair Value, Inputs, Level 3 [Member] - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Level 3 Transfers out, Description			(346)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	$ 458	$ 821	$ 790	$ 769
Included in other comprehensive income	37	(42)	51	10
Balance, ending	495	779	$ 495	779
Fair Value Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Level 3 Transfers out, Description			0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	(226)	(226)	$ (226)	(226)
Included in other comprehensive income	0	0	0	0
Balance, End of Period	$ (226)	$ (226)	$ (226)	$ (226)

Fair Value (Fair Value Of Finan

Fair Value (Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and money market instruments	$ 450,352	$ 146,466
Investment securities	1,513,672	1,514,811
Federal Home Loan Bank Stock	50,086	50,086
Federal Reserve Bank Stock	8,225	8,225
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Impaired Loan Fair Value	7,137	5,983
Other loans	5,269,250	5,161,919
Loans receivable, net	5,287,881	5,178,439
Noninterest bearing checking accounts	1,568,177	1,523,417
Interest bearing transactions accounts	1,374,401	1,174,448
Savings accounts	1,969,887	1,704,920
Time deposits	1,058,886	1,122,598
Other	5,287	1,301
Total deposits	5,976,638	5,526,684
Short-term borrowings	192,896	394,795
Long-term debt	859,473	712,958
Subordinated debentures/notes	12,738	40,903
Fair Value Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swap	226	226
Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest receivable	4,780	3,849
Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest receivable	16,466	14,973
Deposits [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest payable	1,142	900
Borrowings [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest payable	1,440	1,251
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and money market instruments	450,352	146,466
Investment securities	1,509,227	1,517,972
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Derivative Assets	98	124
Impaired Loan Fair Value	7,137	5,983
Other loans	5,292,014	5,204,713
Loans receivable, net	5,310,645	5,221,233
Noninterest bearing checking accounts	1,568,177	1,523,417
Interest bearing transactions accounts	1,374,401	1,174,448
Savings accounts	1,969,887	1,704,920
Time deposits	1,056,570	1,117,870
Other	5,287	1,301
Total deposits	5,974,322	5,521,956
Short-term borrowings	192,896	394,795
Long-term debt	848,992	694,281
Subordinated debentures/notes	15,000	45,000
Reported Value Measurement [Member] | Fair Value Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swap	226	226
Reported Value Measurement [Member] | Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest receivable	4,780	3,849
Reported Value Measurement [Member] | Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest receivable	16,466	14,973
Reported Value Measurement [Member] | Deposits [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest payable	1,142	900
Reported Value Measurement [Member] | Borrowings [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued interest payable	1,140	1,251
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	$ 98	124
Impaired Loan Fair Value		$ 5,983

Fair Value Qualitative informat

Fair Value Qualitative information about Level 3 fair value measurements (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 5,287,881	$ 5,178,439
Impaired Loan Fair Value	7,137	5,983
Other Assets, Fair Value Disclosure	5,269,250	5,161,919
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	5,276,387	5,167,902
Impaired Loan Fair Value	7,137	5,983
Other Assets, Fair Value Disclosure	5,269,250	5,161,919
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	7,137	5,983
Other Assets, Fair Value Disclosure	6,762	6,897
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	7,137	5,983
Other Assets, Fair Value Disclosure	6,762	6,897
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	3,212	3,322
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 3,212	3,322
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Loans Receivable [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Loans Receivable [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	4.80%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Loans Receivable [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	2.40%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 3,212	$ 3,322
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member] | Minimum [Member] | Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	15.00%	15.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	90.00%	90.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member] | Maximum [Member] | Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	15.00%	15.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	24.40%	24.70%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Real Estate [Member] | Weighted Average [Member] | Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	15.00%	15.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 6,147	$ 3,057
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 6,147	3,057
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loan Fair Value		$ 3,057
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	8.80%	9.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Minimum [Member] | Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	90.10%	17.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	102.00%	90.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	12.50%	10.60%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Maximum [Member] | Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	90.10%	18.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	40.10%	20.20%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	9.40%	10.10%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Weighted Average [Member] | Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	90.10%	17.80%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 2,457	$ 2,644
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	12.00%	13.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	68.40%	68.40%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	13.00%	14.00%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	28.90%	26.50%
Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	12.90%	13.10%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loan Fair Value		$ 541
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		0.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member] | Minimum [Member] | Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate		10.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		11.10%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member] | Maximum [Member] | Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate		10.00%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		1.60%
Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate - Remaining Commercial [Member] | Loans Receivable [Member] | Weighted Average [Member] | Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate		10.00%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 1,093	$ 931
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 1,093	931
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loan Fair Value		$ 2,385
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.10%	0.30%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.50%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	33.00%	110.00%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.50%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	11.70%	17.00%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Loans Receivable [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.50%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 1,093	$ 931
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member] | Minimum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	1.20%	3.20%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member] | Maximum [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	79.70%	79.70%
Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Real Estate [Member] | Weighted Average [Member] | Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	30.80%	30.60%
Construction Real Estate - Remaining Commercial [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 127	$ 541
Construction Real Estate - Remaining Commercial [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	127	541
Fair Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loan Fair Value		$ 5,983
Fair Value [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	6,147
Fair Value [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	863
Fair Value [Member] | Construction Real Estate - Remaining Commercial [Member] | Fair Value, Measurements, Nonrecurring [Member] | Construction Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 127

Fair Value Fair Value (Assets a

Fair Value Fair Value (Assets and liabilities measured at fair value on a nonrecurring basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 11,396	$ 10,413
Loans Receivable, Fair Value Disclosure	5,287,881	5,178,439
Other Assets, Fair Value Disclosure	5,269,250	5,161,919
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Loans Receivable, Fair Value Disclosure	11,494	10,537
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	5,276,387	5,167,902
Other Assets, Fair Value Disclosure	5,269,250	5,161,919
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	7,137	5,983
Servicing Asset at Fair Value, Amount	7,110	6,769
Other Assets, Fair Value Disclosure	6,762	6,897
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset at Fair Value, Amount	7,110	6,769
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	7,137	5,983
Other Assets, Fair Value Disclosure	6,762	6,897
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,147	3,057
Commercial Real Estate Portfolio Segment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,147	3,057
Residential Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	1,093	931
Residential Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	1,093	931
Construction Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	3,212	3,322
Construction Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	3,212	3,322
Commercial Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	2,457	2,644
Commercial Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	2,457	2,644
Residential Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	863	2,385
Residential Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	863	2,385
Construction Real Estate - Remaining Commercial [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	127	541
Construction Real Estate - Remaining Commercial [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	127	541
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	11,396	10,413
Loans Receivable, Fair Value Disclosure	5,310,645	5,221,233
Other Assets, Fair Value Disclosure	5,292,014	$ 5,204,713
Fair Value [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	6,147
Fair Value [Member] | Residential Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	863
Fair Value [Member] | Construction Real Estate - Remaining Commercial [Member] | Construction Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	$ 127

Fair Value Fair Value (Impaired

Fair Value Fair Value (Impaired Financing Receivables Additional Information) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule of Impaired Financing Receivables Additional Information [Line Items]
Book Value Of Impaired Loans Carried At Fair Value	$ 7,470	$ 6,379
Partial Charge-Offs On Impaired Loans carried at Fair Value	2,822	3,681
Impaired Financing Receivable, Related Allowance	5,102	548
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount	61,370	63,895
Impaired Financing Receivable, Recorded Investment	73,609	70,426	$ 77,998
Impaired Loan Fair Value	7,137	5,983
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment	66,139	64,047
Partial Charge-offs on Impaired Loans carried at Cost	7,124	21,262
Impaired Financing Receivable, Carrying Value	68,507	69,878
Partial Charge-Offs On Impaired Loans	9,946	24,943
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5,102	548
Financing Receivable, not collateral dependent [Domain]
Schedule of Impaired Financing Receivables Additional Information [Line Items]
Impaired Financing Receivable, Related Allowance	4,769	152
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]
Schedule of Impaired Financing Receivables Additional Information [Line Items]
Impaired Financing Receivable, Related Allowance	$ 333	$ 396

Other Comprehensive Income (L75

Other Comprehensive Income (Loss) (Component Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income before reclassifications	$ 707	$ (2,182)	$ 4,740	$ 13,850
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	0	0	0	0
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, before Tax	0	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	707	(2,182)	4,740	13,850
Other comprehensive income (loss)	707	(2,182)	4,740	13,850
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax	707	(2,182)	4,740	13,850
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax		0	0	0
Changes in pension plan assets and benefit obligations, Net-of-tax amount	(14,740)	(15,351)	(14,740)	(15,351)	$ 14,740	$ 14,740	$ 15,351	$ 15,351
Unrealized gains on available-for-sale securities, Net-of-tax amount	1,735	13,558	1,735	13,558	1,028	(3,005)	15,740	(292)
Total accumulated other comprehensive income (loss), Net-of-tax amount	$ (13,005)	$ (1,793)	(13,005)	$ (1,793)	$ (13,712)	$ (17,745)	$ 389	$ (15,643)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, before Tax			$ 0

Investment in Qualified Affor76

Investment in Qualified Affordable Housing Investment in Qualified Affordable Housing (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 1,900	$ 1,800	$ 5,600	$ 5,500
Affordable housing tax credit investments	54,355		54,355		$ 52,947
Affordable Housing Program Obligation	21,282		21,282		$ 14,282
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 2,300	$ 2,300	$ 6,900	$ 7,000

Repurchase Agreement Borrowin77

Repurchase Agreement Borrowings Repurchase Agreement Borrowings (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Nov. 30, 2012
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount	$ 492,896	$ 509,795
Pledged Assets Separately Reported, Securities Pledged for Repurchase Agreements, at Fair Value	540,000	569,000
Available unpledged securities	619,000	640,000
Long-term Debt [Member]
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Long-term Debt, Prepayment Penalty	25,000
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount			$ 300,000
Payments of Debt Extinguishment Costs, Unamortized Balance	868	4,700
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	191,792	208,691
Maturity up to 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	300,000	0
Maturity over 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	$ 1,104	$ 301,104

Contingent Liabilities Contin78

Contingent Liabilities Contingent Liabilities (Details)	Jun. 30, 2017USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 2,300,000