Community Trust Bancorp (CTBI) 10-Q 8 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	COMMUNITY TRUST BANCORP INC /KY/
Entity Central Index Key	350,852
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		17,692,733
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 48,738	$ 48,603
Interest bearing deposits	107,178	95,586
Federal funds sold	10,500	527
Cash and cash equivalents	166,416	144,716
Certificates of deposit in other banks	11,270	980
Securities available-for-sale at fair value (amortized cost of $604,413 and $608,939, respectively)	603,033	605,394
Securities held-to-maturity at amortized cost (fair value of $858 and $867, respectively)	858	866
Loans held for sale	1,605	1,244
Loans	3,113,421	2,938,371
Allowance for loan and lease losses	(36,391)	(35,933)
Net loans	3,077,030	2,902,438
Premises and equipment, net	46,572	47,940
Federal Home Loan Bank stock	17,927	17,927
Federal Reserve Bank stock	4,887	4,887
Goodwill	65,490	65,490
Core deposit intangible (net of accumulated amortization of $8,602 and $8,483, respectively)	14	133
Bank owned life insurance	64,998	63,881
Mortgage servicing rights	3,283	3,433
Other real estate owned	32,048	35,856
Other assets	40,464	36,984
Total assets	4,135,895	3,932,169
Deposits:
Noninterest bearing	786,856	767,918
Interest bearing	2,413,510	2,313,390
Total deposits	3,200,366	3,081,308
Repurchase agreements	260,007	251,065
Federal funds purchased	8,196	4,816
Advances from Federal Home Loan Bank	50,869	944
Long-term debt	59,341	61,341
Deferred taxes	8,716	7,836
Other liabilities	25,471	24,244
Total liabilities	3,612,966	3,431,554
Shareholders' equity:
Preferred stock, 300,000 shares authorized and unissued	0	0
Common stock, $5 par value, shares authorized 25,000,000; shares outstanding 2017 - 17,677,977; 2016 - 17,628,695	88,390	88,144
Capital surplus	220,875	219,697
Retained earnings	214,561	195,078
Accumulated other comprehensive loss, net of tax	(897)	(2,304)
Total shareholders' equity	522,929	500,615
Total liabilities and shareholders' equity	$ 4,135,895	$ 3,932,169

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Securities available-for-sale at amortized cost	$ 604,413	$ 608,939
Securities held-to-maturity at fair value	858	867
Core deposit intangible, accumulated amortization	$ 8,602	$ 8,483
Shareholders' equity:
Preferred stock, shares authorized (in shares)	300,000	300,000
Common stock, par value (in dollars per share)	$ 5	$ 5
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares outstanding (in shares)	17,677,977	17,628,695

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income and Comprehensive Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income:
Interest and fees on loans, including loans held for sale	$ 36,288	$ 33,593	$ 104,643	$ 100,172
Interest and dividends on securities
Taxable	2,198	2,030	6,458	6,188
Tax exempt	741	653	2,211	2,003
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	308	251	867	757
Other, including interest on federal funds sold	309	152	844	460
Total interest income	39,844	36,679	115,023	109,580
Interest expense:
Interest on deposits	3,754	2,799	9,876	8,047
Interest on repurchase agreements	466	288	1,215	836
Interest on advances from Federal Home Loan Bank	226	3	394	51
Interest on long-term debt	428	362	1,238	1,036
Total interest expense	4,874	3,452	12,723	9,970
Net interest income	34,970	33,227	102,300	99,610
Provision for loan losses	666	2,191	4,659	5,829
Net interest income after provision for loan losses	34,304	31,036	97,641	93,781
Noninterest income:
Service charges on deposit accounts	6,499	6,563	18,658	18,680
Gains on sales of loans, net	390	595	897	1,357
Trust and wealth management income	2,534	2,440	7,769	7,111
Loan related fees	792	1,260	2,570	2,610
Bank owned life insurance	583	560	1,633	1,628
Brokerage revenue	297	387	1,032	1,067
Securities gains	48	458	58	522
Other noninterest income	1,059	923	3,475	2,951
Total noninterest income	12,202	13,186	36,092	35,926
Noninterest expense:
Officer salaries and employee benefits	2,933	3,090	8,860	9,147
Other salaries and employee benefits	11,146	11,126	34,187	33,524
Occupancy, net	2,043	2,012	6,042	6,035
Equipment	741	733	2,275	2,177
Data processing	1,772	1,601	5,318	4,729
Bank franchise tax	1,205	1,492	4,246	4,291
Legal fees	429	455	1,256	1,437
Professional fees	478	473	1,525	1,395
Advertising and marketing	705	674	2,098	1,883
FDIC insurance	316	469	923	1,628
Other real estate owned provision and expense	1,313	873	4,056	1,892
Repossession expense	269	272	697	911
Amortization of limited partnership investments	605	546	1,814	2,078
Other noninterest expense	2,977	2,871	8,845	8,994
Total noninterest expense	26,932	26,687	82,142	80,121
Income before income taxes	19,574	17,535	51,591	49,586
Income taxes	5,811	5,223	15,010	14,106
Net income	13,763	12,312	36,581	35,480
Unrealized holding gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(522)	(2,374)	2,223	5,750
Less: Reclassification adjustments for realized gains included in net income	48	458	58	522
Tax expense (benefit)	(199)	(991)	758	1,830
Other comprehensive income (loss), net of tax	(371)	(1,841)	1,407	3,398
Comprehensive income	$ 13,392	$ 10,471	$ 37,988	$ 38,878
Basic earnings per share (in dollars per share)	$ 0.78	$ 0.70	$ 2.08	$ 2.02
Diluted earnings per share (in dollars per share)	$ 0.78	$ 0.70	$ 2.07	$ 2.02
Weighted average shares outstanding-basic (in shares)	17,633	17,554	17,625	17,532
Weighted average shares outstanding-diluted (in shares)	17,653	17,569	17,645	17,548
Dividends declared per share (in dollars per share)	$ 0.33	$ 0.32	$ 0.97	$ 0.94

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 36,581	$ 35,480
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,019	2,878
Deferred taxes	122	519
Stock-based compensation	447	347
Excess tax benefits of stock-based compensation	0	(58)
Provision for loan losses	4,659	5,829
Write-downs of other real estate owned and other repossessed assets	2,871	632
Gains on sale of mortgage loans held for sale	(897)	(1,357)
Securities gains	(58)	(522)
Gain on debt repurchase	(560)	0
(Gains)/losses on sale of assets, net	(2)	77
Proceeds from sale of mortgage loans held for sale	40,130	61,339
Funding of mortgage loans held for sale	(39,594)	(60,885)
Amortization of securities premiums and discounts, net	2,375	1,614
Change in cash surrender value of bank owned life insurance	(1,117)	(1,151)
Mortgage servicing rights:
Fair value adjustments	419	660
New servicing assets created	(269)	(388)
Changes in:
Other assets	(3,412)	(3,902)
Other liabilities	1,181	11,967
Net cash provided by operating activities	45,895	53,079
Certificates of deposit in other banks:
Purchase of certificates of deposit	(11,515)	0
Maturity of certificates of deposit	1,225	2,852
Securities available-for-sale (AFS):
Purchase of AFS securities	(146,822)	(159,603)
Proceeds from the sales of AFS securities	66,359	54,446
Proceeds from prepayments and maturities of AFS securities	82,672	73,027
Securities held-to-maturity (HTM):
Proceeds from maturities of HTM securities	8	480
Change in loans, net	(181,282)	(65,136)
Purchase of premises and equipment	(1,681)	(2,411)
Proceeds from sale and retirement of premises and equipment	25	10
Proceeds from sale of other real estate and other repossessed assets	3,073	4,041
Net cash used in investing activities	(187,938)	(92,294)
Cash flows from financing activities:
Change in deposits, net	119,058	73,203
Change in repurchase agreements and federal funds purchased, net	12,322	14,272
Proceeds from Federal Home Loan Bank advances	150,000	0
Payments on advances from Federal Home Loan Bank	(100,075)	(100,085)
Repurchase of long-term debt	(1,440)	0
Issuance of common stock	1,017	2,262
Repurchase of common stock	0	(382)
Excess tax benefits of stock-based compensation	0	58
Dividends paid	(17,139)	(16,546)
Net cash provided by (used in) financing activities	163,743	(27,218)
Net increase (decrease) in cash and cash equivalents	21,700	(66,433)
Cash and cash equivalents at beginning of period	144,716	187,611
Cash and cash equivalents at end of period	166,416	121,178
Supplemental disclosures:
Income taxes paid	16,250	13,991
Interest paid	11,151	8,796
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	2,250	2,624
Common stock dividends accrued, paid in subsequent quarter	208	212
Real estate acquired in settlement of loans	$ 4,156	$ 4,300

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 - Summary of Significant Accounting Policies In the opinion of management, the unaudited condensed consolidated financial statements include all adjustments (which consist of normal recurring adjustments) necessary, to present fairly the condensed consolidated financial position as of September 30, 2017, the results of operations for the three and nine months ended September 30, 2017 and 2016, and the cash flows for the nine months ended September 30, 2017 and 2016. In accordance with accounting principles generally accepted in the United States of America for interim financial information, these statements do not include certain information and footnote disclosures required by accounting principles generally accepted in the United States of America for complete annual financial statements. The results of operations for the three and nine months ended September 30, 2017 and the cash flows for the nine months ended September 30, 2017 and 2016 are not necessarily indicative of the results to be expected for the full year. The condensed consolidated balance sheet as of December 31, 2016 has been derived from the audited consolidated financial statements of Community Trust Bancorp, Inc. (“CTBI”) for that period. For further information, refer to the consolidated financial statements and footnotes thereto for the year ended December 31, 2016, included in our annual report on Form 10-K. Principles of Consolidation – Reclassifications – New Accounting Standards Ø Financial Instruments – Overall Financial Instruments – Overall (Subtopic 825-10) Ø Leases – In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) . While we expect the impact of this ASU to be significant, we have not finalized our calculation of the estimated amounts as we are currently evaluating certain significant variables within the calculation including the impact of individual renewal options and applicable discount rates for each individual lease. Ø Investments—Equity Method and Joint Ventures: Simplifying the Transition to the Equity Method of Accounting FASB issued ASU No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. The amendments affect all entities that have an investment that becomes qualified for the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The amendments eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The amendments became effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016 and did not . Ø Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting FASB issued Accounting Standards Update (ASU) No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments are intended to improve the accounting for employee share-based payments and affect all organizations that issue share-based payment awards to their employees. Several aspects of the accounting for share-based payment award transactions are simplified, including: (a) (b) (c) For public companies, the amendments were effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Ø Revenue from Contracts with Customers – Revenue from Contracts with Customers Ø Accounting for Credit Losses Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. For purchased financial assets with a more-than-insignificant amount of credit deterioration since origination (“PCD assets”) that are measured at amortized cost, the initial allowance for credit losses is added to the purchase price rather than being reported as a credit loss expense. Subsequent changes in the allowance for credit losses on PCD assets are recognized through the statement of income as a credit loss expense. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security. ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. CTBI has an implementation team working through the provisions of ASU 2016-13 including assessing the impact on its accounting and disclosures. Ø Statement of Cash Flows Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. Stakeholders indicated that there is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230, Statement of Cash Flows, and other Topics. This ASU addresses the following eight specific cash flow issues: Debt prepayment or debt extinguishment costs; settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned life insurance policies (COLIs) (including bank-owned life insurance policies (BOLIs)); distributions received from equity method investees; beneficial interests in securitization transactions; and separately identifiable cash flows and application of the predominance principle. The amendments in this Update apply to all entities that are required to present a statement of cash flows under Topic 230. This Update is the final version of Proposed Accounting Standards Update EITF-15F— Statement of Cash Flows—Classification of Certain Cash Receipts and Cash Payments (Topic 230) , which has been deleted. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The amendments in this Update should be applied using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. Management intends to adopt this ASU effective January 1, 2018, and we do not expect Ø Simplifying the Test for Goodwill Impairment Intangibles – Goodwill and Other (Topic 350) – Simplifying the Test for Goodwill Impairment Ø Receivables – Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities Critical Accounting Policies and Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires the appropriate application of certain accounting policies, many of which require us to make estimates and assumptions about future events and their impact on amounts reported in our consolidated financial statements and related notes. Since future events and their impact cannot be determined with certainty, the actual results will inevitably differ from our estimates. Such differences could be material to the consolidated financial statements. We believe the application of accounting policies and the estimates required therein are reasonable. These accounting policies and estimates are constantly reevaluated, and adjustments are made when facts and circumstances dictate a change. Historically, we have found our application of accounting policies to be appropriate, and actual results have not differed materially from those determined using necessary estimates. We have identified the following critical accounting policies: Investments Investment Securities a. Trading securities . . b. Available-for-sale securities. Investments not classified as trading securities (nor as held-to-maturity securities) shall be classified as available-for-sale securities. We do not have any securities that are classified as trading securities. Available-for-sale securities are reported at fair value, with unrealized gains and losses included as a separate component of shareholders’ equity, net of tax. If declines in fair value are other than temporary, the carrying value of the securities is written down to fair value as a realized loss with a charge to income for the portion attributable to credit losses and a charge to other comprehensive income for the portion that is not credit related. Gains or losses on disposition of securities are computed by specific identification for all securities except for shares in mutual funds, which are computed by average cost. Interest and dividend income, adjusted by amortization of purchase premium or discount, is included in earnings. When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair market value is below amortized cost, additional analysis is performed to determine whether an other than temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other than temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity and (ii) whether it is more likely than not that we will not have to sell our securities prior to recovery and/or maturity. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the CTBI’s results of operations and financial condition. Loans A restructuring of a debt constitutes a troubled debt restructuring if the creditor for economic or legal reasons related to the debtor’s financial difficulties grants a concession to the debtor that it would not otherwise consider. Loan origination and commitment fees and certain direct loan origination costs are deferred and the net amount amortized over the estimated life of the related loans, leases, or commitments as a yield adjustment. Allowance for Loan and Lease Losses We utilize an internal risk grading system for commercial credits. Those larger commercial credits that exhibit probable or observed credit weaknesses are subject to individual review. The borrower’s cash flow, adequacy of collateral coverage, and other options available to CTBI, including legal remedies, are evaluated. The review of individual loans includes those loans that are impaired as defined by ASC 310-10-35, Impairment of a Loan A loan is considered impaired when, based on current information and events, it is probable that CTBI will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral dependent. Homogenous loans, such as consumer installment, residential mortgages, and home equity lines are not individually risk graded. The associated ALLL for these loans is measured under ASC 450, Contingencies When any secured commercial loan is considered uncollectable, whether past due or not, a current assessment of the value of the underlying collateral is made. If the balance of the loan exceeds the fair value of the collateral, the loan is placed on nonaccrual and the loan is charged down to the value of the collateral less estimated cost to sell or a specific reserve equal to the difference between book value of the loan and the fair value assigned to the collateral is created until such time as the loan is foreclosed. When the foreclosed collateral has been legally assigned to CTBI, the estimated fair value of the collateral less costs to sell is then transferred to other real estate owned or other repossessed assets, and a charge-off is taken for any remaining balance. When any unsecured commercial loan is considered uncollectable the loan is charged off no later than at 90 days past due. All closed-end consumer loans (excluding conventional 1-4 family residential loans and installment and revolving loans secured by real estate) are charged off no later than 120 days (5 monthly payments) delinquent. If a loan is considered uncollectable, it is charged off earlier than 120 days delinquent. For conventional 1-4 family residential loans and installment and revolving loans secured by real estate, when a loan is 90 days past due, a current assessment of the value of the real estate is made. If the balance of the loan exceeds the fair value of the property, the loan is placed on nonaccrual. Foreclosure proceedings are normally initiated after 120 days. When the foreclosed property has been legally assigned to CTBI, the fair value less estimated costs to sell is transferred to other real estate owned and the remaining balance is taken as a charge-off. Historical loss rates for loans are adjusted for significant factors that, in management’s judgment, reflect the impact of any current conditions on loss recognition. We use twelve rolling quarters for our historical loss rate analysis. Factors that we consider include delinquency trends, current economic conditions and trends, strength of supervision and administration of the loan portfolio, levels of underperforming loans, level of recoveries to prior year’s charge-offs, trends in loan losses, industry concentrations and their relative strengths, amount of unsecured loans, and underwriting exceptions. Management continually reevaluates the other subjective factors included in its ALLL analysis. Other Real Estate Owned All revenues and expenses related to the carrying of other real estate owned are recognized through the income statement. Income Taxes

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Stock-Based Compensation [Abstract]
Stock-Based Compensation	Note 2 – Stock-Based Compensation CTBI’s compensation expense related to stock option grants was $14 thousand and $15 thousand, respectively, for the three months ended September 30, 2017 and 2016, and $42 thousand for both the nine months ended September 30, 2017 and 2016. Restricted stock expense for the three months ended September 30, 2017 and 2016 was $131 thousand and $97 thousand, respectively, including $13 thousand and $9 thousand in dividends paid for each period. Restricted stock expense for the nine months ended September 30, 2017 and 2016 was $405 thousand and $305 thousand, respectively, including $40 thousand and $28 thousand in dividends paid for each period. As of September 30, 2017, there was a total of $0.1 million of unrecognized compensation expense related to unvested stock option awards that will be recognized as expense as the awards vest over a weighted average period of 2.6 years and a total of $1.3 million of unrecognized compensation expense related to restricted stock grants that will be recognized as expense as the awards vest over a weighted average period of 3.1 years. There were no shares of restricted stock granted during three months ended September 30, 2017 and 2016. There were 23,668 and 18,069 shares of restricted stock granted during the nine months ended September 30, 2017 and 2016, respectively. The restricted stock was issued pursuant to the terms of CTBI’s 2015 Stock Ownership Incentive Plan. The restrictions on the restricted stock will lapse ratably over four years, except for a 5,000 management retention restricted stock award granted in 2017 which will cliff vest at the end of five years There were no stock options granted in the first nine months of 2017. There were 10,000 stock options granted during the nine months ended September 30, 2016. The fair value of stock options granted during the nine months ended September 30, 2016 were established at the date of grant using a Black-Scholes option pricing model with the weighted average assumptions as follows: Nine Months Ended September 30, 2016 Expected dividend yield 3.70 % Risk-free interest rate 1.45 % Expected volatility 34.34 % Expected term (in years) 7.5 Weighted average fair value of options $ 6.82

Securities

Securities	9 Months Ended
	Sep. 30, 2017
Securities [Abstract]
Securities	Note 3 – Securities Securities are classified into held-to-maturity and available-for-sale categories. Held-to-maturity (HTM) securities are those that CTBI has the positive intent and ability to hold to maturity and are reported at amortized cost. Available-for-sale (AFS) securities are those that CTBI may decide to sell if needed for liquidity, asset-liability management or other reasons. Available-for-sale securities are reported at fair value, with unrealized gains or losses included as a separate component of equity, net of tax. The amortized cost and fair value of securities at September 30, 2017 are summarized as follows: Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and government agencies $ 218,107 $ 239 $ (488 ) $ 217,858 State and political subdivisions 134,840 2,670 (853 ) 136,657 U.S. government sponsored agency mortgage-backed securities 226,466 591 (3,059 ) 223,998 Total debt securities 579,413 3,500 (4,400 ) 578,513 CRA investment funds 25,000 93 (573 ) 24,520 Total available-for-sale securities $ 604,413 $ 3,593 $ (4,973 ) $ 603,033 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value State and political subdivisions $ 858 $ 0 $ 0 $ 858 Total held-to-maturity securities $ 858 $ 0 $ 0 $ 858 The amortized cost and fair value of securities at December 31, 2016 are summarized as follows: Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and government agencies $ 223,014 $ 193 $ (743 ) $ 222,464 State and political subdivisions 133,351 1,957 (1,792 ) 133,516 U.S. government sponsored agency mortgage-backed securities 227,574 1,008 (3,526 ) 225,056 Total debt securities 583,939 3,158 (6,061 ) 581,036 CRA investment funds 25,000 76 (718 ) 24,358 Total available-for-sale securities $ 608,939 $ 3,234 $ (6,779 ) $ 605,394 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value State and political subdivisions $ 866 $ 1 $ 0 $ 867 Total held-to-maturity securities $ 866 $ 1 $ 0 $ 867 The amortized cost and fair value of securities at September 30, 2017 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Available-for-Sale Held-to-Maturity (in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 58,967 $ 58,968 $ 0 $ 0 Due after one through five years 128,058 128,883 858 858 Due after five through ten years 40,962 41,804 0 0 Due after ten years 124,960 124,860 0 0 U.S. government sponsored agency mortgage-backed securities 226,466 223,998 0 0 Total debt securities 579,413 578,513 858 858 CRA investment funds 25,000 24,520 0 0 Total securities $ 604,413 $ 603,033 $ 858 $ 858 During the three months ended September 30, 2017, there was a net gain of $48 thousand on sales of AFS securities, consisting of a pre-tax gain of $150 thousand and a pre-tax loss of $102 thousand. During the three months ended September 30, 2016, there was a net gain of $458 thousand on sales and calls of AFS securities, consisting of a pre-tax gain of $460 thousand and a pre-tax loss of $2 thousand. During the nine months ended September 30, 2017, there was a combined gain of $58 thousand on sales and calls of AFS securities, consisting of a pre-tax gain of $179 thousand and a pre-tax loss of $121 thousand. During the nine months ended September 30, 2016, there was a combined gain of $522 thousand on sales and calls of AFS securities, consisting of a pre-tax gain of $529 thousand and a pre-tax loss of $7 thousand. The amortized cost of securities pledged as collateral, to secure public deposits and for other purposes, was $222.0 million at September 30, 2017 and $221.2 million at December 31, 2016. The amortized cost of securities sold under agreements to repurchase amounted to $296.4 million at September 30, 2017 and $303.5 million at December 31, 2016. CTBI evaluates its investment portfolio on a quarterly basis for impairment. The analysis performed as of September 30, 2017 indicates that all impairment is considered temporary, market and interest rate driven, and not credit-related. The percentage of total investments with unrealized losses as of September 30, 2017 was 66.5% compared to 65.6% as of December 31, 2016. The following tables provide the amortized cost, gross unrealized losses, and fair market value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position as of September 30, 2017 that are not deemed to be other-than-temporarily impaired. There were no held-to-maturity securities that were deemed to be impaired as of September 30, 2017. Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Losses Fair Value Less Than 12 Months U.S. Treasury and government agencies $ 143,007 $ (471 ) $ 142,536 State and political subdivisions 20,141 (236 ) 19,905 U.S. government sponsored agency mortgage-backed securities 71,913 (336 ) 71,577 Total debt securities 235,061 (1,043 ) 234,018 CRA investment funds 7,500 (56 ) 7,444 Total <12 months temporarily impaired AFS securities 242,561 (1,099 ) 241,462 12 Months or More U.S. Treasury and government agencies 21,559 (17 ) 21,542 State and political subdivisions 13,832 (617 ) 13,215 U.S. government sponsored agency mortgage-backed securities 113,712 (2,723 ) 110,989 Total debt securities 149,103 (3,357 ) 145,746 CRA investment funds 15,000 (517 ) 14,483 Total ≥12 months temporarily impaired AFS securities 164,103 (3,874 ) 160,229 Total U.S. Treasury and government agencies 164,566 (488 ) 164,078 State and political subdivisions 33,973 (853 ) 33,120 U.S. government sponsored agency mortgage-backed securities 185,625 (3,059 ) 182,566 Total debt securities 384,164 (4,400 ) 379,764 CRA investment funds 22,500 (573 ) 21,927 Total temporarily impaired AFS securities $ 406,664 $ (4,973 ) $ 401,691 U.S. Treasury and Government Agencies The unrealized losses in U.S. Treasury and government agencies were caused by interest rate increases. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than par which will equal amortized cost at maturity. CTBI does not consider those investments to be other-than-temporarily impaired at September 30, 2017, because CTBI does not intend to sell the investments and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost, which may be maturity. State and Political Subdivisions The unrealized losses in securities of state and political subdivisions were caused by interest rate increases. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than par which will equal amortized cost at maturity. CTBI does not consider those investments to be other-than-temporarily impaired at September 30, 2017, because CTBI does not intend to sell the investments before recovery of their amortized cost and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost, which may be maturity. U.S. Government Sponsored Agency Mortgage-Backed Securities The unrealized losses in U.S. government sponsored agency mortgage-backed securities were caused by interest rate increases. CTBI expects to recover the amortized cost basis over the term of the securities. CTBI does not consider those investments to be other-than-temporarily impaired at September 30, 2017, because (i) the decline in fair market value is attributable to changes in interest rates and not credit quality, (ii) CTBI does not intend to sell the investments, and (iii) it is not more likely than not we will be required to sell the investments before recovery of their amortized cost, which may be maturity. CRA Investment Funds CTBI’s CRA investment funds consist of investments in fixed income mutual funds ($24.5 million of the total fair value and $480 thousand of the total unrealized losses in common stock investments). The severity of the impairment (fair value is approximately 2.3% less than cost) and the duration of the impairment correlates with the decline in long-term interest rates in 2017. CTBI evaluated the near-term prospects of these funds in relation to the severity and duration of the impairment. Based on that evaluation, CTBI does not consider those investments to be other-than-temporarily impaired at September 30, 2017. The analysis performed as of December 31, 2016 indicated that all impairment was considered temporary, market and interest rate driven, and not credit-related. The following tables provide the amortized cost, gross unrealized losses, and fair market value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position as of December 31, 2016 that are not deemed to be other-than-temporarily impaired. There were no held-to-maturity securities that were deemed to be impaired as of December 31, 2016. Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Losses Fair Value Less Than 12 Months U.S. Treasury and government agencies $ 158,732 $ (716 ) $ 158,016 State and political subdivisions 53,491 (1,780 ) 51,711 U.S. government sponsored agency mortgage-backed securities 135,939 (2,646 ) 133,293 Total debt securities 348,162 (5,142 ) 343,020 CRA investment funds 17,500 (444 ) 17,056 Total <12 months temporarily impaired AFS securities 365,662 (5,586 ) 360,076 12 Months or More U.S. Treasury and government agencies 1,880 (27 ) 1,853 State and political subdivisions 751 (12 ) 739 U.S. government sponsored agency mortgage-backed securities 31,132 (880 ) 30,252 Total debt securities 33,763 (919 ) 32,844 CRA investment funds 5,000 (274 ) 4,726 Total ≥12 months temporarily impaired AFS securities 38,763 (1,193 ) 37,570 Total U.S. Treasury and government agencies 160,612 (743 ) 159,869 State and political subdivisions 54,242 (1,792 ) 52,450 U.S. government sponsored agency mortgage-backed securities 167,071 (3,526 ) 163,545 Total debt securities 381,925 (6,061 ) 375,864 CRA investment funds 22,500 (718 ) 21,782 Total temporarily impaired AFS securities $ 404,425 $ (6,779 ) $ 397,646

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Loans [Abstract]
Loans	Note 4 – Loans Major classifications of loans, net of unearned income, deferred loan origination costs, and net premiums on acquired loans, are summarized as follows: (in thousands) September 30 2017 December 31 2016 Commercial construction $ 74,282 $ 66,998 Commercial secured by real estate 1,197,604 1,085,428 Equipment lease financing 3,290 5,512 Commercial other 339,337 350,159 Real estate construction 64,441 57,966 Real estate mortgage 712,237 702,969 Home equity 96,755 91,511 Consumer direct 137,657 133,093 Consumer indirect 487,818 444,735 Total loans $ 3,113,421 $ 2,938,371 CTBI has segregated and evaluates its loan portfolio through nine portfolio segments. CTBI serves customers in small and mid-sized communities in eastern, northeastern, central, and south central Kentucky, southern West Virginia, and northeastern Tennessee. Therefore, CTBI’s exposure to credit risk is significantly affected by changes in these communities. Commercial construction loans are for the purpose of erecting or rehabilitating buildings or other structures for commercial purposes, including any infrastructure necessary for development. Included in this category are improved property, land development, and tract development loans. The terms of these loans are generally short-term with permanent financing upon completion. Commercial real estate loans include loans secured by nonfarm, nonresidential properties, 1-4 family/multi-family properties, farmland, and other commercial real estate. These loans are originated based on the borrower’s ability to service the debt and secondarily based on the fair value of the underlying collateral. Equipment lease financing loans are fixed, variable, and tax exempt leases for commercial purposes. Commercial other loans consist of commercial check loans, agricultural loans, receivable financing, floorplans, loans to financial institutions, loans for purchasing or carrying securities, and other commercial purpose loans. Commercial loans are underwritten based on the borrower’s ability to service debt from the business’s underlying cash flows. As a general practice, we obtain collateral such as real estate, equipment, or other assets, although such loans may be uncollateralized but guaranteed. Real estate construction loans are typically for owner-occupied properties. The terms of these loans are generally short-term with permanent financing upon completion. Residential real estate loans are a mixture of fixed rate and adjustable rate first and second lien residential mortgage loans. As a policy, CTBI holds adjustable rate loans and sells the majority of its fixed rate first lien mortgage loans into the secondary market. Changes in interest rates or market conditions may impact a borrower’s ability to meet contractual principal and interest payments. Residential real estate loans are secured by real property. Home equity lines are revolving adjustable rate credit lines secured by real property. Consumer direct loans are a mixture of fixed rate and adjustable rate products comprised of unsecured loans, consumer revolving credit lines, deposit secured loans, and all other consumer purpose loans. Consumer indirect loans are fixed rate loans secured by automobiles, trucks, vans, and recreational vehicles originated at the selling dealership underwritten and purchased by CTBI’s indirect lending department. Both new and used products are financed. Only dealers who have executed dealer agreements with CTBI participate in the indirect lending program. Not i Refer to note 1 to the condensed consolidated financial statements for further information regarding our nonaccrual policy. Nonaccrual loans segregated by class of loans were as follows: (in thousands) September 30 2017 December 31 2016 Commercial: Commercial construction $ 1,311 $ 1,912 Commercial secured by real estate 7,879 6,326 Commercial other 1,070 1,559 Residential: Real estate construction 1,062 11 Real estate mortgage 7,915 6,260 Home equity 561 555 Total nonaccrual loans $ 19,798 $ 16,623 The following tables present CTBI’s loan portfolio aging analysis, segregated by class, as of September 30, 2017 and December 31, 2016: September 30, 2017 (in thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans 90+ and Accruing* Commercial: Commercial construction $ 69 $ 42 $ 1,311 $ 1,422 $ 72,860 $ 74,282 $ 0 Commercial secured by real estate 3,549 1,287 8,316 13,152 1,184,452 1,197,604 1,518 Equipment lease financing 0 0 0 0 3,290 3,290 0 Commercial other 773 203 1,134 2,110 337,227 339,337 307 Residential: Real estate construction 144 382 344 870 63,571 64,441 155 Real estate mortgage 1,005 5,205 13,646 19,856 692,381 712,237 7,389 Home equity 685 250 756 1,691 95,064 96,755 333 Consumer: Consumer direct 810 152 156 1,118 136,539 137,657 156 Consumer indirect 3,570 927 364 4,861 482,957 487,818 364 Total $ 10,605 $ 8,448 $ 26,027 $ 45,080 $ 3,068,341 $ 3,113,421 $ 10,222 December 31, 2016 (in thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans 90+ and Accruing* Commercial: Commercial construction $ 22 $ 0 $ 1,940 $ 1,962 $ 65,036 $ 66,998 $ 28 Commercial secured by real estate 2,033 478 8,847 11,358 1,074,070 1,085,428 3,015 Equipment lease financing 0 0 0 0 5,512 5,512 0 Commercial other 997 122 1,235 2,354 347,805 350,159 141 Residential: Real estate construction 707 42 152 901 57,065 57,966 152 Real estate mortgage 1,493 5,278 10,695 17,466 685,503 702,969 6,295 Home equity 829 288 905 2,022 89,489 91,511 467 Consumer: Consumer direct 873 265 68 1,206 131,887 133,093 68 Consumer indirect 3,288 851 681 4,820 439,915 444,735 681 Total $ 10,242 $ 7,324 $ 24,523 $ 42,089 $ 2,896,282 $ 2,938,371 $ 10,847 *90+ and Accruing are also included in 90+ Days Past Due column. The risk characteristics of CTBI’s material portfolio segments are as follows: Commercial construction loans generally are made to customers for the purpose of building income-producing properties. Personal guarantees of the principals are generally required. Such loans are made on a projected cash flow basis and are secured by the project being constructed. Construction loan draw procedures are included in each specific loan agreement, including required documentation items and inspection requirements. Construction loans may convert to term loans at the end of the construction period, or may be repaid by the take-out commitment from another financing source. If the loan is to convert to a term loan, the repayment ability is based on the borrower’s projected cash flow. Risk is mitigated during the construction phase by requiring proper documentation and inspections whenever a draw is requested. Loans in amounts greater than $500,000 generally require a performance bond to be posted by the general contractor to assure completion of the project. Commercial real estate loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Management monitors and evaluates commercial real estate loans based on collateral and risk grade criteria. Equipment lease financing is underwritten by our commercial lenders using the same underwriting standards as would be applied to a secured commercial loan requesting 100% financing. The pricing for equipment lease financing is comparable to that of borrowers with similar quality commercial credits with similar collateral. Maximum terms of equipment leasing are determined by the type and expected life of the equipment to be leased. Residual values are determined by appraisals or opinion letters from industry experts. Leases must be in conformity with our consolidated annual tax plan. As we underwrite our equipment lease financing in a manner similar to our commercial loan portfolio described below, the risk characteristics for this portfolio mirror that of the commercial loan portfolio. Commercial loans are primarily based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. With respect to residential loans that are secured by 1-4 family residences and are generally owner occupied, CTBI generally establishes a maximum loan-to-value ratio and requires private mortgage insurance if that ratio is exceeded. Home equity loans are typically secured by a subordinate interest in 1-4 family residences. Residential construction loans are handled through the home mortgage area of the bank. The repayment ability of the borrower and the maximum loan-to-value ratio are calculated using the normal mortgage lending criteria. Draws are processed based on percentage of completion stages including normal inspection procedures. Such loans generally convert to term loans after the completion of construction. Consumer loans are secured by consumer assets such as automobiles or recreational vehicles. Some consumer loans are unsecured such as small installment loans and certain lines of credit. Our determination of a borrower’s ability to repay these loans is primarily dependent on the personal income and credit rating of the borrowers, which can be impacted by economic conditions in their market areas such as unemployment levels. Repayment can also be impacted by changes in property values on residential properties. Risk is mitigated by the fact that the loans are of smaller individual amounts and spread over a large number of borrowers. The indirect lending area of the bank generally deals with purchasing/funding consumer contracts with new and used automobile dealers. The dealers generate consumer loan applications which are forwarded to the indirect loan processing area for approval or denial. Loan approvals or denials are based on the creditworthiness and repayment ability of the borrower, and on the collateral value. The dealers may have limited recourse agreements with CTB. Credit Quality Indicators: CTBI categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. CTBI also considers the fair value of the underlying collateral and the strength and willingness of the guarantor(s). CTBI analyzes commercial loans individually by classifying the loans as to credit risk. Loans classified as loss, doubtful, substandard, or special mention are reviewed quarterly by CTBI for further deterioration or improvement to determine if appropriately classified and valued if deemed impaired. All other commercial loan reviews are completed every 12 to 18 months. In addition, during the renewal process of any loan, as well as if a loan becomes past due or if other information becomes available, CTBI will evaluate the loan grade. CTBI uses the following definitions for risk ratings: Ø Pass Ø Watch Ø Other assets especially mentioned (OAEM) Ø Substandard Ø Doubtful The following tables present the credit risk profile of CTBI’s commercial loan portfolio based on rating category and payment activity, segregated by class of loans, as of September 30, 2017 and December 31, 2016: (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Leases Commercial Other Total September 30, 2017 Pass $ 64,983 $ 1,059,574 $ 3,229 $ 292,574 $ 1,420,360 Watch 3,566 67,065 0 31,270 101,901 OAEM 1,657 21,676 61 2,056 25,450 Substandard 3,898 49,072 0 13,078 66,048 Doubtful 178 217 0 359 754 Total $ 74,282 $ 1,197,604 $ 3,290 $ 339,337 $ 1,614,513 December 31, 2016 Pass $ 55,315 $ 975,383 $ 5,206 $ 299,301 $ 1,335,205 Watch 3,366 51,932 137 32,780 88,215 OAEM 2,535 25,772 169 7,913 36,389 Substandard 5,592 31,945 0 9,599 47,136 Doubtful 190 396 0 566 1,152 Total $ 66,998 $ 1,085,428 $ 5,512 $ 350,159 $ 1,508,097 The following tables present the credit risk profile of CTBI’s residential real estate and consumer loan portfolios based on performing or nonperforming status, segregated by class, as of September 30, 2017 and December 31, 2016: (in thousands) Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total September 30, 2017 Performing $ 63,224 $ 696,933 $ 95,861 $ 137,501 $ 487,454 $ 1,480,973 Nonperforming (1) 1,217 15,304 894 156 364 17,935 Total $ 64,441 $ 712,237 $ 96,755 $ 137,657 $ 487,818 $ 1,498,908 December 31, 2016 Performing $ 57,803 $ 690,414 $ 90,489 $ 133,025 $ 444,054 $ 1,415,785 Nonperforming (1) 163 12,555 1,022 68 681 14,489 Total $ 57,966 $ 702,969 $ 91,511 $ 133,093 $ 444,735 $ 1,430,274 (1) A loan is considered nonperforming if it is 90 days or more past due and/or on nonaccrual. The total of consumer mortgage loans secured by real estate properties for which formal foreclosure proceedings are in process totaled $4.8 million at September 30, 2017 compared to $3.5 million at December 31, 2016. A loan is considered impaired, in accordance with the impairment accounting guidance (ASC 310-10-35-16), when based on current information and events, it is probable CTBI will be unable to collect all amounts due from the borrower in accordance with the contractual terms of the loan. Impaired loans include nonperforming commercial loans but also include loans modified in troubled debt restructurings where concessions have been granted to borrowers experiencing financial difficulties. These concessions could include a reduction in the interest rate on the loan, payment extensions, forgiveness of principal, forbearance, or other actions intended to maximize collection. The following table presents impaired loans, the average investment in impaired loans, and interest income recognized on impaired loans for the periods ended September 30, 2017, December 31, 2016, and September 30, 2016: September 30, 2017 (in thousands) Recorded Balance Unpaid Contractual Principal Balance Specific Allowance Loans without a specific valuation allowance: Commercial construction $ 4,613 $ 4,621 $ 0 Commercial secured by real estate 25,322 25,916 0 Commercial other 9,994 11,804 0 Real estate construction 873 873 0 Real estate mortgage 1,196 1,196 0 Loans with a specific valuation allowance: Commercial construction 153 174 25 Commercial secured by real estate 3,918 5,023 1,301 Commercial other 130 133 65 Totals: Commercial construction 4,766 4,795 25 Commercial secured by real estate 29,240 30,939 1,301 Commercial other 10,124 11,937 65 Real estate construction 873 873 0 Real estate mortgage 1,196 1,196 0 Total $ 46,199 $ 49,740 $ 1,391 Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 (in thousands) Average Investment in Impaired Loans *Interest Income Recognized Average Investment in Impaired Loans *Interest Income Recognized Loans without a specific valuation allowance: Commercial construction $ 4,662 $ 50 $ 4,955 $ 136 Commercial secured by real estate 25,452 276 27,318 980 Equipment lease financing 0 0 45 0 Commercial other 10,191 123 10,717 396 Real estate construction 860 0 569 0 Real estate mortgage 1,197 8 1,601 30 Loans with a specific valuation allowance: Commercial construction 153 0 156 0 Commercial secured by real estate 3,984 3 4,236 8 Commercial other 130 0 87 0 Totals: Commercial construction 4,815 50 5,111 136 Commercial secured by real estate 29,436 279 31,554 988 Equipment lease financing 0 0 45 0 Commercial other 10,321 123 10,804 396 Real estate construction 860 0 569 0 Real estate mortgage 1,197 8 1,601 30 Total $ 46,629 $ 460 $ 49,684 $ 1,550 December 31, 2016 (in thousands) Recorded Balance Unpaid Contractual Principal Balance Specific Allowance Average Investment in Impaired Loans *Interest Income Recognized Loans without a specific valuation allowance: Commercial construction $ 4,102 $ 4,123 $ 0 $ 4,367 $ 218 Commercial secured by real estate 29,025 29,594 0 31,136 1,609 Commercial other 11,215 13,155 0 11,561 632 Real estate mortgage 1,483 1,483 0 1,691 52 Loans with a specific valuation allowance: Commercial construction 1,507 1,509 213 2,290 0 Commercial secured by real estate 4,731 5,885 1,035 4,151 19 Commercial other 139 139 65 483 0 Totals: Commercial construction 5,609 5,632 213 6,657 218 Commercial secured by real estate 33,756 35,479 1,035 35,287 1,628 Commercial other 11,354 13,294 65 12,044 632 Real estate mortgage 1,483 1,483 0 1,691 52 Total $ 52,202 $ 55,888 $ 1,313 $ 55,679 $ 2,530 September 30, 2016 (in thousands) Recorded Balance Unpaid Contractual Principal Balance Specific Allowance Loans without a specific valuation allowance: Commercial construction $ 4,270 $ 4,293 $ 0 Commercial secured by real estate 32,311 33,004 0 Commercial other 11,382 13,191 0 Real estate mortgage 1,489 1,489 0 Loans with a specific valuation allowance: Commercial construction 1,668 1,670 212 Commercial secured by real estate 3,537 4,688 747 Commercial other 388 408 190 Totals: Commercial construction 5,938 5,963 212 Commercial secured by real estate 35,848 37,692 747 Commercial other 11,770 13,599 190 Real estate mortgage 1,489 1,489 0 Total $ 55,045 $ 58,743 $ 1,149 Three Months Ended Nine Months Ended September 30, 2016 September 30, 2016 (in thousands) Average Investment in Impaired Loans *Interest Income Recognized Average Investment in Impaired Loans *Interest Income Recognized Loans without a specific valuation allowance: Commercial construction $ 4,299 $ 63 $ 4,450 $ 168 Commercial secured by real estate 32,534 390 31,795 1,164 Commercial other 11,497 153 11,564 470 Real estate mortgage 1,492 15 1,759 45 Loans with a specific valuation allowance: Commercial construction 1,798 0 2,524 0 Commercial secured by real estate 3,547 1 3,957 19 Commercial other 405 0 597 0 Totals: Commercial construction 6,097 63 6,974 168 Commercial secured by real estate 36,081 391 35,752 1,183 Commercial other 11,902 153 12,161 470 Real estate mortgage 1,492 15 1,759 45 Total $ 55,572 $ 622 $ 56,646 $ 1,866 *Cash basis interest is substantially the same as interest income recognized. Included in certain loan categories of impaired loans are certain loans and leases that have been modified in a troubled debt restructuring, where economic concessions have been granted to borrowers who have experienced financial difficulties. These concessions typically result from our loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. Modifications of terms for our loans and their inclusion as troubled debt restructurings are based on individual facts and circumstances. Loan modifications that are included as troubled debt restructurings may involve either an increase or reduction of the interest rate, extension of the term of the loan, or deferral of principal and/or interest payments, regardless of the period of the modification. All of the loans identified as troubled debt restructuring were modified due to financial stress of the borrower. In order to determine if a borrower is experiencing financial difficulty, an evaluation is performed to determine the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under CTBI’s internal underwriting policy. When we modify loans and leases in a troubled debt restructuring, we evaluate any possible impairment similar to other impaired loans based on the present value of expected future cash flows, discounted at the contractual interest rate of the original loan or lease agreement, or use the current fair value of the collateral, less selling costs for collateral dependent loans. If we determined that the value of the modified loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount), impairment is recognized through an allowance estimate or a charge-off to the allowance. In periods subsequent to modification, we evaluate all troubled debt restructuring, including those that have payment defaults, for possible impairment and recognize impairment through the allowance. During 2017, Three Months Ended September 30, 2017 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial secured by real estate 6 $ 295 $ 0 $ 0 $ 295 Commercial other 1 102 0 0 102 Total troubled debt restructurings 7 $ 397 $ 0 $ 0 $ 397 Nine Months Ended September 30, 2017 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 2 $ 0 $ 0 $ 114 $ 114 Commercial secured by real estate 11 874 0 192 1,066 Commercial other 10 237 0 136 373 Residential: Real estate construction 1 846 0 0 846 Real estate mortgage 1 323 0 0 323 Total troubled debt restructurings 25 $ 2,280 $ 0 $ 442 $ 2,722 Three Months Ended September 30, 2016 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial secured by real estate 2 $ 152 $ 0 $ 0 $ 152 Total troubled debt restructurings 2 $ 152 $ 0 $ 0 $ 152 Nine Months Ended September 30, 2016 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 5 $ 1,408 $ 0 $ 0 $ 1,408 Commercial secured by real estate 23 5,761 0 580 6,341 Commercial other 16 5,041 0 0 5,041 Residential: Real estate mortgage 1 0 0 280 280 Total troubled debt restructurings 45 $ 12,210 $ 0 $ 860 $ 13,070 Year Ended December 31, 2016 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 1 $ 1,288 $ 0 $ 0 $ 1,288 Commercial secured by real estate 27 8,827 0 581 9,408 Commercial other 14 5,088 0 87 5,175 Residential: Real estate mortgage 1 0 0 281 281 Total troubled debt restructurings 43 $ 15,203 $ 0 $ 949 $ 16,152 No charge-offs have resulted from modifications for any of the presented periods. We had commitments to extend additional credit in the amount of $0.1 million on loans that were considered troubled debt restructurings at September 30, 2017. Loans retain their accrual status at the time of their modification. As a result, if a loan is on nonaccrual at the time it is modified, it stays as nonaccrual, and if a loan is on accrual at the time of the modification, it generally stays on accrual. Commercial and consumer loans modified in a troubled debt restructuring are closely monitored for delinquency as an early indicator of possible future default. If loans modified in a troubled debt restructuring subsequently default, CTBI evaluates the loan for possible further impairment. The allowance for loan losses may be increased, adjustments may be made in the allocation of the allowance, or partial charge-offs may be taken to further write-down the carrying value of the loan. Presented below, segregated by class of loans, are loans that were modified as troubled debt restructurings within the prior twelve months which subsequently defaulted during the three and nine months ended September 30, 2017 and 2016. CTBI considers a loan in default when it is 90 days or more past due or transferred to nonaccrual. (in thousands) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Number of Loans Recorded Balance Number of Loans Recorded Balance Commercial: Commercial secured by real estate 2 $ 961 2 $ 961 Residential: Real estate construction 1 846 1 846 Total defaulted restructured loans 3 $ 1,807 3 $ 1,807 (in thousands) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Number of Loans Recorded Balance Number of Loans Recorded Balance Commercial: Commercial secured by real estate 1 $ 1,446 2 $ 1,956 Commercial other 1 14 2 372 Total defaulted restructured loans 2 $ 1,460 4 $ 2,328

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2017
Allowance for Loan and Lease Losses [Abstract]
Allowance for Loan and Lease Losses	Note 5 – Allowance for Loan and Lease Losses The following tables present the balance in the allowance for loan and lease losses (“ALLL”) and the recorded investment in loans based on portfolio segment and impairment method as of September 30, 2017, December 31, 2016 and September 30, 2016: Three Months Ended September 30, 2017 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 669 $ 15,299 $ 33 $ 4,993 $ 581 $ 5,662 $ 747 $ 1,866 $ 7,283 $ 37,133 Provision charged to expense (19 ) (1 ) (14 ) 210 49 276 113 47 5 666 Losses charged off (6 ) (249 ) 0 (549 ) 0 (158 ) (53 ) (166 ) (1,262 ) (2,443 ) Recoveries 28 53 0 308 0 6 0 110 530 1,035 Ending balance $ 672 $ 15,102 $ 19 $ 4,962 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 36,391 Ending balance: Individually evaluated for impairment $ 25 $ 1,301 $ 0 $ 65 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,391 Collectively evaluated for impairment $ 647 $ 13,801 $ 19 $ 4,897 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 35,000 Loans Ending balance: Individually evaluated for impairment $ 4,766 $ 29,240 $ 0 $ 10,124 $ 873 $ 1,196 $ 0 $ 0 $ 0 $ 46,199 Collectively evaluated for impairment $ 69,516 $ 1,168,364 $ 3,290 $ 329,213 $ 63,568 $ 711,041 $ 96,755 $ 137,657 $ 487,818 $ 3,067,222 Nine Months Ended September 30, 2017 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 884 $ 14,191 $ 42 $ 4,656 $ 629 $ 6,027 $ 774 $ 1,885 $ 6,845 $ 35,933 Provision charged to expense (239 ) 1,622 (23 ) 1,229 0 1 87 243 1,739 4,659 Losses charged off (10 ) (776 ) 0 (1,386 ) 0 (321 ) (57 ) (675 ) (3,898 ) (7,123 ) Recoveries 37 65 0 463 1 79 3 404 1,870 2,922 Ending balance $ 672 $ 15,102 $ 19 $ 4,962 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 36,391 Ending balance: Individually evaluated for impairment $ 25 $ 1,301 $ 0 $ 65 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,391 Collectively evaluated for impairment $ 647 $ 13,801 $ 19 $ 4,897 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 35,000 Loans Ending balance: Individually evaluated for impairment $ 4,766 $ 29,240 $ 0 $ 10,124 $ 873 $ 1,196 $ 0 $ 0 $ 0 $ 46,199 Collectively evaluated for impairment $ 69,516 $ 1,168,364 $ 3,290 $ 329,213 $ 63,568 $ 711,041 $ 96,755 $ 137,657 $ 487,818 $ 3,067,222 Three Months Ended September 30, 2016 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 1,437 $ 14,438 $ 94 $ 4,430 $ 558 $ 6,372 $ 819 $ 1,634 $ 5,915 $ 35,697 Provision charged to expense 54 585 (28 ) 185 8 330 3 170 884 2,191 Losses charged off (79 ) (319 ) 0 (622 ) (61 ) (366 ) 0 (204 ) (1,311 ) (2,962 ) Recoveries 18 78 0 92 4 8 2 111 562 875 Ending balance $ 1,430 $ 14,782 $ 66 $ 4,085 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 35,801 Ending balance: Individually evaluated for impairment $ 212 $ 747 $ 0 $ 190 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,149 Collectively evaluated for impairment $ 1,218 $ 14,035 $ 66 $ 3,895 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 34,652 Loans Ending balance: Individually evaluated for impairment $ 5,938 $ 35,848 $ 0 $ 11,770 $ 0 $ 1,489 $ 0 $ 0 $ 0 $ 55,045 Collectively evaluated for impairment $ 62,337 $ 1,047,792 $ 6,242 $ 343,214 $ 55,412 $ 704,539 $ 89,467 $ 131,815 $ 435,436 $ 2,876,254 Nine Months Ended September 30, 2016 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 2,199 $ 14,434 $ 79 $ 4,225 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 36,094 Provision charged to expense (701 ) 1,726 (13 ) 1,156 144 440 (1 ) 669 2,409 5,829 Losses charged off (94 ) (1,505 ) 0 (1,667 ) (192 ) (849 ) (21 ) (893 ) (3,508 ) (8,729 ) Recoveries 26 127 0 371 7 75 7 341 1,653 2,607 Ending balance $ 1,430 $ 14,782 $ 66 $ 4,085 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 35,801 Ending balance: Individually evaluated for impairment $ 212 $ 747 $ 0 $ 190 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,149 Collectively evaluated for impairment $ 1,218 $ 14,035 $ 66 $ 3,895 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 34,652 Loans Ending balance: Individually evaluated for impairment $ 5,938 $ 35,848 $ 0 $ 11,770 $ 0 $ 1,489 $ 0 $ 0 $ 0 $ 55,045 Collectively evaluated for impairment $ 62,337 $ 1,047,792 $ 6,242 $ 343,214 $ 55,412 $ 704,539 $ 89,467 $ 131,815 $ 435,436 $ 2,876,254 December 31, 2016 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 2,199 $ 14,434 $ 79 $ 4,225 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 36,094 Provision charged to expense (1,035 ) 1,220 (37 ) 2,128 264 291 (20 ) 912 4,149 7,872 Losses charged off (316 ) (1,641 ) 0 (2,136 ) (192 ) (1,043 ) (54 ) (1,236 ) (5,050 ) (11,668 ) Recoveries 36 178 0 439 7 101 9 615 2,250 3,635 Ending balance $ 884 $ 14,191 $ 42 $ 4,656 $ 629 $ 6,027 $ 774 $ 1,885 $ 6,845 $ 35,933 Ending balance: Individually evaluated for impairment $ 213 $ 1,035 $ 0 $ 65 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,313 Collectively evaluated for impairment $ 671 $ 13,156 $ 42 $ 4,591 $ 629 $ 6,027 $ 774 $ 1,885 $ 6,845 $ 34,620 Loans Ending balance: Individually evaluated for impairment $ 5,609 $ 33,756 $ 0 $ 11,354 $ 0 $ 1,483 $ 0 $ 0 $ 0 $ 52,202 Collectively evaluated for impairment $ 61,389 $ 1,051,672 $ 5,512 $ 338,805 $ 57,966 $ 701,486 $ 91,511 $ 133,093 $ 444,735 $ 2,886,169

Other Real Estate Owned

Other Real Estate Owned	9 Months Ended
	Sep. 30, 2017
Other Real Estate Owned [Abstract]
Other Real Estate Owned	Note 6 – Other Real Estate Owned Activity for other real estate owned was as follows: Three Months Ended Nine Months Ended September 30 September 30 (in thousands) 2017 2016 2017 2016 Beginning balance of other real estate owned $ 32,785 $ 37,740 $ 35,856 $ 40,674 New assets acquired 2,722 1,008 4,303 4,300 Capitalized costs 0 0 0 0 Fair value adjustments (884 ) (408 ) (2,871 ) (632 ) Sale of assets (2,575 ) (675 ) (5,240 ) (6,677 ) Ending balance of other real estate owned $ 32,048 $ 37,665 $ 32,048 $ 37,665 Foreclosed properties at September 30, 2017 were $32.0 million. Carrying costs and fair value adjustments associated with foreclosed properties were $1.3 million and $0.9 million, respectively, for the three months ended September 30, 2017 and 2016 and $4.1 million and $1.9 million, respectively, for the nine months ended September 30, 2017 and 2016. The major classifications of foreclosed properties are shown in the following table: (in thousands) September 30 2017 December 31 2016 1-4 family $ 5,117 $ 6,210 Agricultural/farmland 68 93 Construction/land development/other 16,620 20,778 Multifamily 176 270 Non-farm/non-residential 10,067 8,505 Total foreclosed properties $ 32,048 $ 35,856

Repurchase Agreements

Repurchase Agreements	9 Months Ended
	Sep. 30, 2017
Repurchase Agreements [Abstract]
Repurchase Agreements	Note 7 – Repurchase Agreements We utilize securities sold under agreements to repurchase to facilitate the needs of our customers and provide additional funding to our balance sheet. Repurchase agreements are transactions whereby we offer to sell to a counterparty an undivided interest in an eligible security at an agreed upon purchase price, and which obligates CTBI to repurchase the security on an agreed upon date at an agreed upon repurchase price plus interest at an agreed upon rate. Securities sold under agreements to repurchase are recorded at the amount of cash received in connection with the transaction and are reflected in the accompanying consolidated balance sheets. We monitor collateral levels on a continuous basis and maintain records of each transaction specifically describing the applicable security and the counterparty’s fractional interest in that security, and we segregate the security from its general assets in accordance with regulations governing custodial holdings of securities. The primary risk with our repurchase agreements is market risk associated with the securities securing the transactions, as we may be required to provide additional collateral based on fair value changes of the underlying securities. Securities pledged as collateral under repurchase agreements are maintained with our safekeeping agents. The carrying value of investment securities available-for-sale pledged as collateral under repurchase agreements totaled $296.8 million and $302.3 million at September 30, 2017 and December 31, 2016, respectively. The remaining contractual maturity of the securities sold under agreements to repurchase by class of collateral pledged included in the accompanying consolidated balance sheets as of September 30, 2017 and December 31, 2016 is presented in the following tables: September 30, 2017 Remaining Contractual Maturity of the Agreements (in thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and U.S. Treasury and government agencies $ 31,171 $ 56,126 $ 0 $ 26,488 $ 113,785 State and political subdivisions 63,611 4,573 610 6,919 75,713 U.S. government sponsored agency mortgage-backed securities 21,630 36,301 116 12,462 70,509 Total $ 116,412 $ 97,000 $ 726 $ 45,869 $ 260,007 December 31, 2016 Remaining Contractual Maturity of the Agreements (in thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and U.S. Treasury and government agencies $ 17,249 $ 0 $ 14,349 $ 73,076 $ 104,674 State and political subdivisions 55,354 0 1,998 10,272 67,624 U.S. government sponsored agency mortgage-backed securities 23,386 0 8,003 47,378 78,767 Total $ 95,989 $ 0 $ 24,350 $ 130,726 $ 251,065

Fair Market Value of Financial

Fair Market Value of Financial Assets and Liabilities	9 Months Ended
	Sep. 30, 2017
Fair Market Value of Financial Assets and Liabilities [Abstract]
Fair Market Value of Financial Assets and Liabilities	Note 8 – Fair Market Value of Financial Assets and Liabilities Fair Value Measurements ASC 820, Fair Value Measurements Level 1 Inputs – Quoted prices in active markets for identical assets or liabilities. Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability, such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. Recurring Measurements The following tables present the fair value measurements of assets recognized in the accompanying balance sheets measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016 and indicate the level within the fair value hierarchy of the valuation techniques. Fair Value Measurements at September 30, 2017 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – recurring basis Available-for-sale securities: U.S. Treasury and government agencies $ 217,858 $ 65,093 $ 152,765 $ 0 State and political subdivisions 136,657 0 136,657 0 U.S. government sponsored agenc y mortgage-backed securities 223,998 0 223,998 0 CRA investment funds 24,520 24,520 0 0 Mortgage servicing rights 3,283 0 0 3,283 Fair Value Measurements at December 31, 2016 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – recurring basis Available-for-sale securities: U.S. Treasury and government agencies $ 222,464 $ 44,934 $ 177,530 $ 0 State and political subdivisions 133,516 0 133,516 0 U.S. government sponsored agenc y mortgage-backed securities 225,056 0 225,056 0 CRA investment funds 24,358 24,358 0 0 Mortgage servicing rights 3,433 0 0 3,433 Following is a description of the valuation methodologies and inputs used for assets measured at fair value on a recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such assets pursuant to the valuation hierarchy. These valuation methodologies were applied to all of CTBI’s financial assets carried at fair value. CTBI had no liabilities measured and recorded at fair value as of September 30, 2017 and December 31, 2016. There have been no significant changes in the valuation techniques during the quarter or nine months ended September 30, 2017. For assets classified within Level 3 of the fair value hierarchy, the process used to develop the reported fair value is described below. Available-for-Sale Securities Securities classified as available-for-sale are reported at fair value on a recurring basis. U.S. Treasury and government agencies and CTBI’s CRA investment funds are classified as Level 1 of the valuation hierarchy where quoted market prices are available in the active market on which the individual securities are traded. If quoted market prices are not available, CTBI obtains fair value measurements from an independent pricing service, such as Interactive Data, which utilizes pricing models to determine fair value measurement. CTBI reviews the pricing quarterly to verify the reasonableness of the pricing. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other factors. U.S. Treasury and government agencies, state and political subdivisions, and U.S. government sponsored agency mortgage-backed securities are classified as Level 2 inputs. In certain cases where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy. Fair value determinations for Level 3 measurements are estimated on a quarterly basis where assumptions used are reviewed to ensure the estimated fair value complies with accounting standards generally accepted in the United States. As of September 30, 2017 and December 31, 2016, CTBI does not own any securities valued using Level 3 inputs. Mortgage Servicing Rights Mortgage servicing rights do not trade in an active, open market with readily observable prices. CTBI reports mortgage servicing rights at fair value on a recurring basis with subsequent remeasurement of MSRs based on change in fair value. In determining fair value, CTBI utilizes the expertise of an independent third party. Accordingly, fair value is determined by the independent third party by utilizing assumptions about factors such as mortgage interest rates, discount rates, mortgage loan prepayment speeds, market trends and industry demand. Due to the nature of the valuation inputs, mortgage servicing rights are classified within Level 3 of the hierarchy. Fair value determinations for Level 3 measurements of mortgage servicing rights are tested for impairment on a quarterly basis where assumptions used are reviewed to ensure the estimated fair value complies with accounting standards generally accepted in the United States. See the table below for inputs and valuation techniques used for Level 3 mortgage servicing rights. Transfers between Levels There were no transfers between Levels 1, 2, and 3 as of September 30, 2017. Level 3 Reconciliation Following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying balance sheet using significant unobservable (Level 3) inputs for the three and nine months ended September 30, 2017 and 2016: Mortgage Servicing Rights Three Months Ended Nine Months Ended September 30 September 30 (in thousands) 2017 2016 2017 2016 Beginning balance $ 3,304 $ 2,797 $ 3,433 $ 3,236 Total recognized gains (losses) Included in net income 5 118 (73 ) (422 ) Issues 98 167 269 388 Settlements (124 ) (118 ) (346 ) (238 ) Ending balance $ 3,283 $ 2,964 $ 3,283 $ 2,964 Total gains (losses) for the period included in net income attributable to the change in unrealized gains or losses related to assets still held at the reporting date $ 5 $ 118 $ (73 ) $ (422 ) Realized and unrealized gains and losses for items reflected in the table above are included in net income in the consolidated statements of income as follows: Noninterest Income Three Months Ended Nine Months Ended September 30 September 30 (in thousands) 2017 2016 2017 2016 Total losses $ (119 ) $ 0 $ (419 ) $ (660 ) Nonrecurring Measurements The following tables present the fair value measurements of assets recognized in the accompanying balance sheets measured at fair value on a nonrecurring basis as of September 30, 2017 and December 31, 2016 and indicate the level within the fair value hierarchy of the valuation techniques. Fair Value Measurements at September 30, 2017 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – nonrecurring basis Impaired loans (collateral dependent) $ 1,732 $ 0 $ 0 $ 1,732 Other real estate/assets owned 18,843 0 0 18,843 Fair Value Measurements at December 31, 2016 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – nonrecurring basis Impaired loans (collateral dependent) $ 5,506 $ 0 $ 0 $ 5,506 Other real estate/assets owned 4,388 0 0 4,388 Following is a description of the valuation methodologies and inputs used for assets measured at fair value on a nonrecurring basis and recognized in the accompanying balance sheet, as well as the general classification of such assets pursuant to the valuation hierarchy. For assets classified within Level 3 of the fair value hierarchy, the process used to develop the reported fair value is described below. Impaired Loans (Collateral Dependent) The estimated fair value of collateral-dependent impaired loans is based on the appraised fair value of the collateral, less estimated cost to sell. Collateral-dependent impaired loans are classified within Level 3 of the fair value hierarchy. CTBI considers the appraisal or evaluation as the starting point for determining fair value and then considers other factors and events in the environment that may affect the fair value. Appraisals of the collateral underlying collateral-dependent loans are obtained when the loan is determined to be collateral-dependent and subsequently as deemed necessary by the Chief Credit Officer. Appraisals are reviewed for accuracy and consistency by the Chief Credit Officer. Appraisers are selected from the list of approved appraisers maintained by management. The appraised values are reduced by discounts to consider lack of marketability and estimated cost to sell if repayment or satisfaction of the loan is dependent on the sale of the collateral. These discounts and estimates are developed by the Chief Credit Officer by comparison to historical results. Loans considered impaired under ASC 310-35, Impairment of a Loan, Other Real Estate Owned In accordance with the provisions of ASC 360, Property, Plant, and Equipment, Our policy for determining the frequency of periodic reviews is based upon consideration of the specific properties and the known or perceived market fluctuations in a particular market and is typically between 12 and 18 months but generally not more than 24 months. Appraisers are selected from the list of approved appraisers maintained by management. Unobservable (Level 3) Inputs The following tables present quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements at September 30, 2017 and December 31, 2016. (in thousands) Quantitative Information about Level 3 Fair Value Measurements Fair Value at September 30, 2017 Valuation Technique(s) Unobservable Input Range (Weighted Average) Mortgage servicing rights $ 3,283 Discount cash flows, computer pricing model Constant prepayment rate 7.0% - 29.5% (10.6%) Probability of default 0.0% - 100.0% (3.3%) Discount rate 10.0% - 11.5% (10.1%) Impaired loans (collateral-dependent) $ 1,732 Market comparable properties Marketability discount 10.0% - 89.0% (40.4%) Other real estate/assets owned $ 18,843 Market comparable properties Comparability adjustments 6.0% - 68.7% (16.3%) (in thousands) Quantitative Information about Level 3 Fair Value Measurements Fair Value at December 31, 2016 Valuation Technique(s) Unobservable Input Range (Weighted Average) Mortgage servicing rights $ 3,433 Discount cash flows, computer pricing model Constant prepayment rate 7.0% - 27.0% (9.5%) Probability of default 0.0% - 100.0% (3.0%) Discount rate 10.0% - 11.5% (10.1%) Impaired loans (collateral-dependent) $ 5,506 Market comparable properties Marketability discount 0.0% - 100.0% (33.7%) Other real estate/assets owned $ 4,388 Market comparable properties Comparability adjustments 10.0% - 100.0% (14.9%) Sensitivity of Significant Unobservable Inputs The following is a discussion of the sensitivity of significant unobservable inputs, the interrelationships between those inputs and other unobservable inputs used in recurring fair value measurement and of how those inputs might magnify or mitigate the effect of changes in the unobservable inputs on the fair value measurement. Mortgage Servicing Rights Fair market value for mortgage servicing rights is derived based on unobservable inputs, such as prepayment speeds of the underlying loans generated using the Andrew Davidson Prepayment Model, FHLMC/FNMA guidelines, the weighted average life of the loan, the discount rate, the weighted average coupon, and the weighted average default rate. Significant increases (decreases) in either of those inputs in isolation would result in a significantly lower (higher) fair value measurement. Generally, a change in the assumption used for prepayment speeds is accompanied by a directionally opposite change in the assumption for interest rates. Fair Value of Financial Instruments The following table presents estimated fair value of CTBI’s financial instruments as of September 30, 2017 and indicates the level within the fair value hierarchy of the valuation techniques. Fair Value Measurements at September 30, 2017 Using (in thousands) Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 166,416 $ 166,416 $ 0 $ 0 Certificates of deposit in other banks 11,270 0 11,244 0 Securities available-for-sale 603,033 89,613 513,420 0 Securities held-to-maturity 858 0 858 0 Loans held for sale 1,605 1,651 0 0 Loans, net 3,077,030 0 0 3,057,809 Federal Home Loan Bank stock 17,927 0 17,927 0 Federal Reserve Bank stock 4,887 0 4,887 0 Accrued interest receivable 12,920 0 12,920 0 Mortgage servicing rights 3,283 0 0 3,283 Financial liabilities: Deposits $ 3,200,366 $ 786,856 $ 2,410,741 $ 0 Repurchase agreements 260,007 0 0 260,044 Federal funds purchased 8,196 0 8,196 0 Advances from Federal Home Loan Bank 50,869 0 50,870 0 Long-term debt 59,341 0 0 49,073 Accrued interest payable 2,771 0 2,771 0 Unrecognized financial instruments: Letters of credit $ 0 $ 0 $ 0 $ 0 Commitments to extend credit 0 0 0 0 Forward sale commitments 0 0 0 0 The following table presents estimated fair value of CTBI’s financial instruments as of December 31, 2016 and indicates the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2016 Using Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 144,716 $ 144,716 $ 0 $ 0 Certificates of deposit in other banks 980 0 982 0 Securities available-for-sale 605,394 69,292 536,102 0 Securities held-to-maturity 866 0 867 0 Loans held for sale 1,244 1,260 0 0 Loans, net 2,902,438 0 0 2,882,348 Federal Home Loan Bank stock 17,927 0 17,927 0 Federal Reserve Bank stock 4,887 0 4,887 0 Accrued interest receivable 11,922 0 11,922 0 Mortgage servicing rights 3,433 0 0 3,433 Financial liabilities: Deposits $ 3,081,308 $ 767,918 $ 2,321,690 $ 0 Repurchase agreements 251,065 0 0 250,820 Federal funds purchased 4,816 0 4,816 0 Advances from Federal Home Loan Bank 944 0 1,009 0 Long-term debt 61,341 0 0 49,073 Accrued interest payable 1,200 0 1,200 0 Unrecognized financial instruments: Letters of credit $ 0 $ 0 $ 0 $ 0 Commitments to extend credit 0 0 0 0 Forward sale commitments 0 0 0 0 The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: Cash and cash equivalents – The carrying amount approximates fair value. Certificates of deposit in other banks – Fair values are based on quoted market prices or dealer quotes for similar instruments. Securities held-to-maturity – Fair values are based on quoted market prices, if available. If a quoted price is not available, fair value is estimated using quoted prices for similar securities. The fair value estimate is provided to management from a third party using modeling assumptions specific to each type of security that are reviewed and approved by management. Quarterly sampling of fair values provided by additional third parties supplement the fair value review process. Loans held for sale – The fair value is predetermined at origination based on sale price. Loans (net of the allowance for loan and lease losses) – The fair value of fixed rate loans and variable rate mortgage loans is estimated by discounting the future cash flows using current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. For other variable rate loans, the carrying amount approximates fair value. Federal Home Loan Bank stock – The carrying value of Federal Home Loan Bank stock approximates fair value based on the redemption provisions of the Federal Home Loan Bank. Federal Reserve Bank stock – The carrying value of Federal Reserve Bank stock approximates fair value based on the redemption provisions of the Federal Reserve Bank. Accrued interest receivable – The carrying amount approximates fair value. Deposits – The fair value of fixed maturity time deposits is estimated by discounting the future cash flows using the rates currently offered for deposits of similar remaining maturities. For deposits including demand deposits, savings accounts, NOW accounts, and certain money market accounts, the carrying value approximates fair value. Repurchase agreements – The fair value is estimated by discounting future cash flows using current rates. Federal funds purchased – The carrying amount approximates fair value. Advances from Federal Home Loan Bank – The fair value of these fixed-maturity advances is estimated by discounting future cash flows using rates currently offered for advances of similar remaining maturities. Long-term debt – The fair value is estimated by discounting future cash flows using current rates. Accrued interest payable – The carrying amount approximates fair value. Commitments to originate loans, forward sale commitments, letters of credit, and lines of credit – The fair value of commitments to originate loans is estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value of forward sale commitments is estimated based on current market prices for loans of similar terms and credit quality. The fair values of letters of credit and lines of credit are based on fees currently charged for similar agreements or on the estimated cost to terminate or otherwise settle the obligations with the counterparties at the reporting date. The fair values of these commitments are not material.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Note 9 – Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended September 30 September 30 (in thousands except per share data) 2017 2016 2017 2016 Numerator: Net income $ 13,763 $ 12,312 $ 36,581 $ 35,480 Denominator: Basic earnings per share: Weighted average shares 17,633 17,554 17,625 17,532 Diluted earnings per share: Effect of dilutive stock options and restricted stock grants 20 15 20 16 Adjusted weighted average shares 17,653 17,569 17,645 17,548 Earnings per share: Basic earnings per share $ 0.78 $ 0.70 $ 2.08 $ 2.02 Diluted earnings per share 0.78 0.70 2.07 2.02 There were no options to purchase common shares that were excluded from the diluted calculations above for the three and nine months ended September 30, 2017. In addition to in-the-money stock options, unvested restricted stock grants were also used in the calculation of diluted earnings per share based on the treasury method. There were no options to purchase common shares that were excluded from the diluted calculations for the three months ended September 30, 2016. Options to purchase 15,730 common shares at a weighted average price of $35.409 were excluded from the diluted calculations above for the nine months ended September 30, 2016, because the exercise prices on the options were greater than the average market price for the period.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2017
Accumulated Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income	Note 10 – Accumulated Other Comprehensive Income Unrealized gains on AFS securities Amounts reclassified from accumulated other comprehensive income (AOCI) and the affected line items in the statements of income during the three and nine months ended September 30, 2017 and 2016 were: Amounts Reclassified from AOCI (in thousands) Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Affected line item in the statements of income Securities gains $ 48 $ 458 $ 58 $ 522 Tax expense 17 160 20 183 Total reclassifications out of AOCI $ 31 $ 298 $ 38 $ 339

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 11 – Commitments and Contingencies CTB will be required to make certain customer reimbursements related to two deposit add-on products. As previously discussed in CTBI’s most recent Form 10-K and Form 10-Q, management established a related accrual in 2014, which was not considered material. The time period and amount of the reimbursements have not yet been determined; therefore, the actual amount may materially vary from the amount management has evaluated as most likely at September 30, 2017.

Summary of Significant Accoun17

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Summary of Significant Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation –
Reclassifications	Reclassifications –
New Accounting Standards	New Accounting Standards Ø Financial Instruments – Overall Financial Instruments – Overall (Subtopic 825-10) Ø Leases – In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) . While we expect the impact of this ASU to be significant, we have not finalized our calculation of the estimated amounts as we are currently evaluating certain significant variables within the calculation including the impact of individual renewal options and applicable discount rates for each individual lease. Ø Investments—Equity Method and Joint Ventures: Simplifying the Transition to the Equity Method of Accounting FASB issued ASU No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. The amendments affect all entities that have an investment that becomes qualified for the equity method of accounting as a result of an increase in the level of ownership interest or degree of influence. The amendments eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The amendments should be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The amendments became effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016 and did not . Ø Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting FASB issued Accounting Standards Update (ASU) No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments are intended to improve the accounting for employee share-based payments and affect all organizations that issue share-based payment awards to their employees. Several aspects of the accounting for share-based payment award transactions are simplified, including: (a) (b) (c) For public companies, the amendments were effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Ø Revenue from Contracts with Customers – Revenue from Contracts with Customers Ø Accounting for Credit Losses Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. For purchased financial assets with a more-than-insignificant amount of credit deterioration since origination (“PCD assets”) that are measured at amortized cost, the initial allowance for credit losses is added to the purchase price rather than being reported as a credit loss expense. Subsequent changes in the allowance for credit losses on PCD assets are recognized through the statement of income as a credit loss expense. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security. ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. CTBI has an implementation team working through the provisions of ASU 2016-13 including assessing the impact on its accounting and disclosures. Ø Statement of Cash Flows Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. Stakeholders indicated that there is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230, Statement of Cash Flows, and other Topics. This ASU addresses the following eight specific cash flow issues: Debt prepayment or debt extinguishment costs; settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing; contingent consideration payments made after a business combination; proceeds from the settlement of insurance claims; proceeds from the settlement of corporate-owned life insurance policies (COLIs) (including bank-owned life insurance policies (BOLIs)); distributions received from equity method investees; beneficial interests in securitization transactions; and separately identifiable cash flows and application of the predominance principle. The amendments in this Update apply to all entities that are required to present a statement of cash flows under Topic 230. This Update is the final version of Proposed Accounting Standards Update EITF-15F— Statement of Cash Flows—Classification of Certain Cash Receipts and Cash Payments (Topic 230) , which has been deleted. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The amendments in this Update should be applied using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. Management intends to adopt this ASU effective January 1, 2018, and we do not expect Ø Simplifying the Test for Goodwill Impairment Intangibles – Goodwill and Other (Topic 350) – Simplifying the Test for Goodwill Impairment Ø Receivables – Nonrefundable Fees and Other Costs: Premium Amortization on Purchased Callable Debt Securities Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities
Critical Accounting Policies and Estimates	Critical Accounting Policies and Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires the appropriate application of certain accounting policies, many of which require us to make estimates and assumptions about future events and their impact on amounts reported in our consolidated financial statements and related notes. Since future events and their impact cannot be determined with certainty, the actual results will inevitably differ from our estimates. Such differences could be material to the consolidated financial statements. We believe the application of accounting policies and the estimates required therein are reasonable. These accounting policies and estimates are constantly reevaluated, and adjustments are made when facts and circumstances dictate a change. Historically, we have found our application of accounting policies to be appropriate, and actual results have not differed materially from those determined using necessary estimates.
Investments	Investments Investment Securities a. Trading securities . . b. Available-for-sale securities. Investments not classified as trading securities (nor as held-to-maturity securities) shall be classified as available-for-sale securities. We do not have any securities that are classified as trading securities. Available-for-sale securities are reported at fair value, with unrealized gains and losses included as a separate component of shareholders’ equity, net of tax. If declines in fair value are other than temporary, the carrying value of the securities is written down to fair value as a realized loss with a charge to income for the portion attributable to credit losses and a charge to other comprehensive income for the portion that is not credit related. Gains or losses on disposition of securities are computed by specific identification for all securities except for shares in mutual funds, which are computed by average cost. Interest and dividend income, adjusted by amortization of purchase premium or discount, is included in earnings. When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair market value is below amortized cost, additional analysis is performed to determine whether an other than temporary impairment condition exists. Available-for-sale and held-to-maturity securities are analyzed quarterly for possible other than temporary impairment. The analysis considers (i) whether we have the intent to sell our securities prior to recovery and/or maturity and (ii) whether it is more likely than not that we will not have to sell our securities prior to recovery and/or maturity. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the CTBI’s results of operations and financial condition.
Loans	Loans A restructuring of a debt constitutes a troubled debt restructuring if the creditor for economic or legal reasons related to the debtor’s financial difficulties grants a concession to the debtor that it would not otherwise consider. Loan origination and commitment fees and certain direct loan origination costs are deferred and the net amount amortized over the estimated life of the related loans, leases, or commitments as a yield adjustment.
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses We utilize an internal risk grading system for commercial credits. Those larger commercial credits that exhibit probable or observed credit weaknesses are subject to individual review. The borrower’s cash flow, adequacy of collateral coverage, and other options available to CTBI, including legal remedies, are evaluated. The review of individual loans includes those loans that are impaired as defined by ASC 310-10-35, Impairment of a Loan A loan is considered impaired when, based on current information and events, it is probable that CTBI will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral dependent. Homogenous loans, such as consumer installment, residential mortgages, and home equity lines are not individually risk graded. The associated ALLL for these loans is measured under ASC 450, Contingencies When any secured commercial loan is considered uncollectable, whether past due or not, a current assessment of the value of the underlying collateral is made. If the balance of the loan exceeds the fair value of the collateral, the loan is placed on nonaccrual and the loan is charged down to the value of the collateral less estimated cost to sell or a specific reserve equal to the difference between book value of the loan and the fair value assigned to the collateral is created until such time as the loan is foreclosed. When the foreclosed collateral has been legally assigned to CTBI, the estimated fair value of the collateral less costs to sell is then transferred to other real estate owned or other repossessed assets, and a charge-off is taken for any remaining balance. When any unsecured commercial loan is considered uncollectable the loan is charged off no later than at 90 days past due. All closed-end consumer loans (excluding conventional 1-4 family residential loans and installment and revolving loans secured by real estate) are charged off no later than 120 days (5 monthly payments) delinquent. If a loan is considered uncollectable, it is charged off earlier than 120 days delinquent. For conventional 1-4 family residential loans and installment and revolving loans secured by real estate, when a loan is 90 days past due, a current assessment of the value of the real estate is made. If the balance of the loan exceeds the fair value of the property, the loan is placed on nonaccrual. Foreclosure proceedings are normally initiated after 120 days. When the foreclosed property has been legally assigned to CTBI, the fair value less estimated costs to sell is transferred to other real estate owned and the remaining balance is taken as a charge-off. Historical loss rates for loans are adjusted for significant factors that, in management’s judgment, reflect the impact of any current conditions on loss recognition. We use twelve rolling quarters for our historical loss rate analysis. Factors that we consider include delinquency trends, current economic conditions and trends, strength of supervision and administration of the loan portfolio, levels of underperforming loans, level of recoveries to prior year’s charge-offs, trends in loan losses, industry concentrations and their relative strengths, amount of unsecured loans, and underwriting exceptions. Management continually reevaluates the other subjective factors included in its ALLL analysis.
Other Real Estate Owned	Other Real Estate Owned All revenues and expenses related to the carrying of other real estate owned are recognized through the income statement.
Income Taxes	Income Taxes

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Stock-Based Compensation [Abstract]
Schedule of Weighted Average Assumptions Used for Estimating the Grant-Date Fair Value of Each Option Grant	The fair value of stock options granted during the nine months ended September 30, 2016 were established at the date of grant using a Black-Scholes option pricing model with the weighted average assumptions as follows: Nine Months Ended September 30, 2016 Expected dividend yield 3.70 % Risk-free interest rate 1.45 % Expected volatility 34.34 % Expected term (in years) 7.5 Weighted average fair value of options $ 6.82

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Securities [Abstract]
Summary of Amortized Cost and Fair Value of Available-for-sale Securities	The amortized cost and fair value of securities at September 30, 2017 are summarized as follows: Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and government agencies $ 218,107 $ 239 $ (488 ) $ 217,858 State and political subdivisions 134,840 2,670 (853 ) 136,657 U.S. government sponsored agency mortgage-backed securities 226,466 591 (3,059 ) 223,998 Total debt securities 579,413 3,500 (4,400 ) 578,513 CRA investment funds 25,000 93 (573 ) 24,520 Total available-for-sale securities $ 604,413 $ 3,593 $ (4,973 ) $ 603,033 The amortized cost and fair value of securities at December 31, 2016 are summarized as follows: Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and government agencies $ 223,014 $ 193 $ (743 ) $ 222,464 State and political subdivisions 133,351 1,957 (1,792 ) 133,516 U.S. government sponsored agency mortgage-backed securities 227,574 1,008 (3,526 ) 225,056 Total debt securities 583,939 3,158 (6,061 ) 581,036 CRA investment funds 25,000 76 (718 ) 24,358 Total available-for-sale securities $ 608,939 $ 3,234 $ (6,779 ) $ 605,394
Summary of Amortized Cost and Fair Value of Held-to-maturity Securities	The amortized cost and fair value of securities at September 30, 2017 are summarized as follows: Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value State and political subdivisions $ 858 $ 0 $ 0 $ 858 Total held-to-maturity securities $ 858 $ 0 $ 0 $ 858 The amortized cost and fair value of securities at December 31, 2016 are summarized as follows: Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value State and political subdivisions $ 866 $ 1 $ 0 $ 867 Total held-to-maturity securities $ 866 $ 1 $ 0 $ 867
Amortized Cost and Fair Value of Securities by Contractual Maturity	The amortized cost and fair value of securities at September 30, 2017 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Available-for-Sale Held-to-Maturity (in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 58,967 $ 58,968 $ 0 $ 0 Due after one through five years 128,058 128,883 858 858 Due after five through ten years 40,962 41,804 0 0 Due after ten years 124,960 124,860 0 0 U.S. government sponsored agency mortgage-backed securities 226,466 223,998 0 0 Total debt securities 579,413 578,513 858 858 CRA investment funds 25,000 24,520 0 0 Total securities $ 604,413 $ 603,033 $ 858 $ 858
Available for Sale Securities and Held-to-Maturity Securities, Continuous Unrealized Loss Position	The following tables provide the amortized cost, gross unrealized losses, and fair market value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position as of September 30, 2017 that are not deemed to be other-than-temporarily impaired. There were no held-to-maturity securities that were deemed to be impaired as of September 30, 2017. Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Losses Fair Value Less Than 12 Months U.S. Treasury and government agencies $ 143,007 $ (471 ) $ 142,536 State and political subdivisions 20,141 (236 ) 19,905 U.S. government sponsored agency mortgage-backed securities 71,913 (336 ) 71,577 Total debt securities 235,061 (1,043 ) 234,018 CRA investment funds 7,500 (56 ) 7,444 Total <12 months temporarily impaired AFS securities 242,561 (1,099 ) 241,462 12 Months or More U.S. Treasury and government agencies 21,559 (17 ) 21,542 State and political subdivisions 13,832 (617 ) 13,215 U.S. government sponsored agency mortgage-backed securities 113,712 (2,723 ) 110,989 Total debt securities 149,103 (3,357 ) 145,746 CRA investment funds 15,000 (517 ) 14,483 Total ≥12 months temporarily impaired AFS securities 164,103 (3,874 ) 160,229 Total U.S. Treasury and government agencies 164,566 (488 ) 164,078 State and political subdivisions 33,973 (853 ) 33,120 U.S. government sponsored agency mortgage-backed securities 185,625 (3,059 ) 182,566 Total debt securities 384,164 (4,400 ) 379,764 CRA investment funds 22,500 (573 ) 21,927 Total temporarily impaired AFS securities $ 406,664 $ (4,973 ) $ 401,691 The following tables provide the amortized cost, gross unrealized losses, and fair market value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position as of December 31, 2016 that are not deemed to be other-than-temporarily impaired. There were no held-to-maturity securities that were deemed to be impaired as of December 31, 2016. Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Losses Fair Value Less Than 12 Months U.S. Treasury and government agencies $ 158,732 $ (716 ) $ 158,016 State and political subdivisions 53,491 (1,780 ) 51,711 U.S. government sponsored agency mortgage-backed securities 135,939 (2,646 ) 133,293 Total debt securities 348,162 (5,142 ) 343,020 CRA investment funds 17,500 (444 ) 17,056 Total <12 months temporarily impaired AFS securities 365,662 (5,586 ) 360,076 12 Months or More U.S. Treasury and government agencies 1,880 (27 ) 1,853 State and political subdivisions 751 (12 ) 739 U.S. government sponsored agency mortgage-backed securities 31,132 (880 ) 30,252 Total debt securities 33,763 (919 ) 32,844 CRA investment funds 5,000 (274 ) 4,726 Total ≥12 months temporarily impaired AFS securities 38,763 (1,193 ) 37,570 Total U.S. Treasury and government agencies 160,612 (743 ) 159,869 State and political subdivisions 54,242 (1,792 ) 52,450 U.S. government sponsored agency mortgage-backed securities 167,071 (3,526 ) 163,545 Total debt securities 381,925 (6,061 ) 375,864 CRA investment funds 22,500 (718 ) 21,782 Total temporarily impaired AFS securities $ 404,425 $ (6,779 ) $ 397,646

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
Loans [Abstract]
Summary of Major Classification of Loans Net of Unearned Income, Deferred Loan Origination Costs and Net Premiums on Acquired Loans	Major classifications of loans, net of unearned income, deferred loan origination costs, and net premiums on acquired loans, are summarized as follows: (in thousands) September 30 2017 December 31 2016 Commercial construction $ 74,282 $ 66,998 Commercial secured by real estate 1,197,604 1,085,428 Equipment lease financing 3,290 5,512 Commercial other 339,337 350,159 Real estate construction 64,441 57,966 Real estate mortgage 712,237 702,969 Home equity 96,755 91,511 Consumer direct 137,657 133,093 Consumer indirect 487,818 444,735 Total loans $ 3,113,421 $ 2,938,371
Nonaccrual Loans Segregated by Class of Loans	Nonaccrual loans segregated by class of loans were as follows: (in thousands) September 30 2017 December 31 2016 Commercial: Commercial construction $ 1,311 $ 1,912 Commercial secured by real estate 7,879 6,326 Commercial other 1,070 1,559 Residential: Real estate construction 1,062 11 Real estate mortgage 7,915 6,260 Home equity 561 555 Total nonaccrual loans $ 19,798 $ 16,623
Bank's Loan Portfolio Aging Analysis, Segregated by Class	The following tables present CTBI’s loan portfolio aging analysis, segregated by class, as of September 30, 2017 and December 31, 2016: September 30, 2017 (in thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans 90+ and Accruing* Commercial: Commercial construction $ 69 $ 42 $ 1,311 $ 1,422 $ 72,860 $ 74,282 $ 0 Commercial secured by real estate 3,549 1,287 8,316 13,152 1,184,452 1,197,604 1,518 Equipment lease financing 0 0 0 0 3,290 3,290 0 Commercial other 773 203 1,134 2,110 337,227 339,337 307 Residential: Real estate construction 144 382 344 870 63,571 64,441 155 Real estate mortgage 1,005 5,205 13,646 19,856 692,381 712,237 7,389 Home equity 685 250 756 1,691 95,064 96,755 333 Consumer: Consumer direct 810 152 156 1,118 136,539 137,657 156 Consumer indirect 3,570 927 364 4,861 482,957 487,818 364 Total $ 10,605 $ 8,448 $ 26,027 $ 45,080 $ 3,068,341 $ 3,113,421 $ 10,222 December 31, 2016 (in thousands) 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans 90+ and Accruing* Commercial: Commercial construction $ 22 $ 0 $ 1,940 $ 1,962 $ 65,036 $ 66,998 $ 28 Commercial secured by real estate 2,033 478 8,847 11,358 1,074,070 1,085,428 3,015 Equipment lease financing 0 0 0 0 5,512 5,512 0 Commercial other 997 122 1,235 2,354 347,805 350,159 141 Residential: Real estate construction 707 42 152 901 57,065 57,966 152 Real estate mortgage 1,493 5,278 10,695 17,466 685,503 702,969 6,295 Home equity 829 288 905 2,022 89,489 91,511 467 Consumer: Consumer direct 873 265 68 1,206 131,887 133,093 68 Consumer indirect 3,288 851 681 4,820 439,915 444,735 681 Total $ 10,242 $ 7,324 $ 24,523 $ 42,089 $ 2,896,282 $ 2,938,371 $ 10,847 *90+ and Accruing are also included in 90+ Days Past Due column.
Credit Risk Profile of the Bank's Commercial Loan Portfolio Based on Rating Category and Payment Activity, Segregated by Class of Loans	The following tables present the credit risk profile of CTBI’s commercial loan portfolio based on rating category and payment activity, segregated by class of loans, as of September 30, 2017 and December 31, 2016: (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Leases Commercial Other Total September 30, 2017 Pass $ 64,983 $ 1,059,574 $ 3,229 $ 292,574 $ 1,420,360 Watch 3,566 67,065 0 31,270 101,901 OAEM 1,657 21,676 61 2,056 25,450 Substandard 3,898 49,072 0 13,078 66,048 Doubtful 178 217 0 359 754 Total $ 74,282 $ 1,197,604 $ 3,290 $ 339,337 $ 1,614,513 December 31, 2016 Pass $ 55,315 $ 975,383 $ 5,206 $ 299,301 $ 1,335,205 Watch 3,366 51,932 137 32,780 88,215 OAEM 2,535 25,772 169 7,913 36,389 Substandard 5,592 31,945 0 9,599 47,136 Doubtful 190 396 0 566 1,152 Total $ 66,998 $ 1,085,428 $ 5,512 $ 350,159 $ 1,508,097
Credit Risk Profile of Residential Real Estate and Consumer Loan Portfolio Based on Performing and Nonperforming Status Segregated by Class	The following tables present the credit risk profile of CTBI’s residential real estate and consumer loan portfolios based on performing or nonperforming status, segregated by class, as of September 30, 2017 and December 31, 2016: (in thousands) Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total September 30, 2017 Performing $ 63,224 $ 696,933 $ 95,861 $ 137,501 $ 487,454 $ 1,480,973 Nonperforming (1) 1,217 15,304 894 156 364 17,935 Total $ 64,441 $ 712,237 $ 96,755 $ 137,657 $ 487,818 $ 1,498,908 December 31, 2016 Performing $ 57,803 $ 690,414 $ 90,489 $ 133,025 $ 444,054 $ 1,415,785 Nonperforming (1) 163 12,555 1,022 68 681 14,489 Total $ 57,966 $ 702,969 $ 91,511 $ 133,093 $ 444,735 $ 1,430,274 (1) A loan is considered nonperforming if it is 90 days or more past due and/or on nonaccrual.
Impaired Loans, Average Investment in Impaired Loans, and Interest Income Recognized on Impaired Loans	The following table presents impaired loans, the average investment in impaired loans, and interest income recognized on impaired loans for the periods ended September 30, 2017, December 31, 2016, and September 30, 2016: September 30, 2017 (in thousands) Recorded Balance Unpaid Contractual Principal Balance Specific Allowance Loans without a specific valuation allowance: Commercial construction $ 4,613 $ 4,621 $ 0 Commercial secured by real estate 25,322 25,916 0 Commercial other 9,994 11,804 0 Real estate construction 873 873 0 Real estate mortgage 1,196 1,196 0 Loans with a specific valuation allowance: Commercial construction 153 174 25 Commercial secured by real estate 3,918 5,023 1,301 Commercial other 130 133 65 Totals: Commercial construction 4,766 4,795 25 Commercial secured by real estate 29,240 30,939 1,301 Commercial other 10,124 11,937 65 Real estate construction 873 873 0 Real estate mortgage 1,196 1,196 0 Total $ 46,199 $ 49,740 $ 1,391 Three Months Ended Nine Months Ended September 30, 2017 September 30, 2017 (in thousands) Average Investment in Impaired Loans *Interest Income Recognized Average Investment in Impaired Loans *Interest Income Recognized Loans without a specific valuation allowance: Commercial construction $ 4,662 $ 50 $ 4,955 $ 136 Commercial secured by real estate 25,452 276 27,318 980 Equipment lease financing 0 0 45 0 Commercial other 10,191 123 10,717 396 Real estate construction 860 0 569 0 Real estate mortgage 1,197 8 1,601 30 Loans with a specific valuation allowance: Commercial construction 153 0 156 0 Commercial secured by real estate 3,984 3 4,236 8 Commercial other 130 0 87 0 Totals: Commercial construction 4,815 50 5,111 136 Commercial secured by real estate 29,436 279 31,554 988 Equipment lease financing 0 0 45 0 Commercial other 10,321 123 10,804 396 Real estate construction 860 0 569 0 Real estate mortgage 1,197 8 1,601 30 Total $ 46,629 $ 460 $ 49,684 $ 1,550 December 31, 2016 (in thousands) Recorded Balance Unpaid Contractual Principal Balance Specific Allowance Average Investment in Impaired Loans *Interest Income Recognized Loans without a specific valuation allowance: Commercial construction $ 4,102 $ 4,123 $ 0 $ 4,367 $ 218 Commercial secured by real estate 29,025 29,594 0 31,136 1,609 Commercial other 11,215 13,155 0 11,561 632 Real estate mortgage 1,483 1,483 0 1,691 52 Loans with a specific valuation allowance: Commercial construction 1,507 1,509 213 2,290 0 Commercial secured by real estate 4,731 5,885 1,035 4,151 19 Commercial other 139 139 65 483 0 Totals: Commercial construction 5,609 5,632 213 6,657 218 Commercial secured by real estate 33,756 35,479 1,035 35,287 1,628 Commercial other 11,354 13,294 65 12,044 632 Real estate mortgage 1,483 1,483 0 1,691 52 Total $ 52,202 $ 55,888 $ 1,313 $ 55,679 $ 2,530 September 30, 2016 (in thousands) Recorded Balance Unpaid Contractual Principal Balance Specific Allowance Loans without a specific valuation allowance: Commercial construction $ 4,270 $ 4,293 $ 0 Commercial secured by real estate 32,311 33,004 0 Commercial other 11,382 13,191 0 Real estate mortgage 1,489 1,489 0 Loans with a specific valuation allowance: Commercial construction 1,668 1,670 212 Commercial secured by real estate 3,537 4,688 747 Commercial other 388 408 190 Totals: Commercial construction 5,938 5,963 212 Commercial secured by real estate 35,848 37,692 747 Commercial other 11,770 13,599 190 Real estate mortgage 1,489 1,489 0 Total $ 55,045 $ 58,743 $ 1,149 Three Months Ended Nine Months Ended September 30, 2016 September 30, 2016 (in thousands) Average Investment in Impaired Loans *Interest Income Recognized Average Investment in Impaired Loans *Interest Income Recognized Loans without a specific valuation allowance: Commercial construction $ 4,299 $ 63 $ 4,450 $ 168 Commercial secured by real estate 32,534 390 31,795 1,164 Commercial other 11,497 153 11,564 470 Real estate mortgage 1,492 15 1,759 45 Loans with a specific valuation allowance: Commercial construction 1,798 0 2,524 0 Commercial secured by real estate 3,547 1 3,957 19 Commercial other 405 0 597 0 Totals: Commercial construction 6,097 63 6,974 168 Commercial secured by real estate 36,081 391 35,752 1,183 Commercial other 11,902 153 12,161 470 Real estate mortgage 1,492 15 1,759 45 Total $ 55,572 $ 622 $ 56,646 $ 1,866 *Cash basis interest is substantially the same as interest income recognized.
Troubled Debt Restructuring	Presented below, segregated by class of loans, are troubled debt restructurings that occurred during the three and nine months ended September 30, 2017 and 2016 and the year ended December 31, 2016: Three Months Ended September 30, 2017 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial secured by real estate 6 $ 295 $ 0 $ 0 $ 295 Commercial other 1 102 0 0 102 Total troubled debt restructurings 7 $ 397 $ 0 $ 0 $ 397 Nine Months Ended September 30, 2017 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 2 $ 0 $ 0 $ 114 $ 114 Commercial secured by real estate 11 874 0 192 1,066 Commercial other 10 237 0 136 373 Residential: Real estate construction 1 846 0 0 846 Real estate mortgage 1 323 0 0 323 Total troubled debt restructurings 25 $ 2,280 $ 0 $ 442 $ 2,722 Three Months Ended September 30, 2016 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial secured by real estate 2 $ 152 $ 0 $ 0 $ 152 Total troubled debt restructurings 2 $ 152 $ 0 $ 0 $ 152 Nine Months Ended September 30, 2016 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 5 $ 1,408 $ 0 $ 0 $ 1,408 Commercial secured by real estate 23 5,761 0 580 6,341 Commercial other 16 5,041 0 0 5,041 Residential: Real estate mortgage 1 0 0 280 280 Total troubled debt restructurings 45 $ 12,210 $ 0 $ 860 $ 13,070 Year Ended December 31, 2016 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 1 $ 1,288 $ 0 $ 0 $ 1,288 Commercial secured by real estate 27 8,827 0 581 9,408 Commercial other 14 5,088 0 87 5,175 Residential: Real estate mortgage 1 0 0 281 281 Total troubled debt restructurings 43 $ 15,203 $ 0 $ 949 $ 16,152
Summary of Defaulted Restructured Loans	Presented below, segregated by class of loans, are loans that were modified as troubled debt restructurings within the prior twelve months which subsequently defaulted during the three and nine months ended September 30, 2017 and 2016. CTBI considers a loan in default when it is 90 days or more past due or transferred to nonaccrual. (in thousands) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Number of Loans Recorded Balance Number of Loans Recorded Balance Commercial: Commercial secured by real estate 2 $ 961 2 $ 961 Residential: Real estate construction 1 846 1 846 Total defaulted restructured loans 3 $ 1,807 3 $ 1,807 (in thousands) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Number of Loans Recorded Balance Number of Loans Recorded Balance Commercial: Commercial secured by real estate 1 $ 1,446 2 $ 1,956 Commercial other 1 14 2 372 Total defaulted restructured loans 2 $ 1,460 4 $ 2,328

Allowance for Loan and Lease 21

Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2017
Allowance for Loan and Lease Losses [Abstract]
Activity in Allowance for Loan and Lease Losses	The following tables present the balance in the allowance for loan and lease losses (“ALLL”) and the recorded investment in loans based on portfolio segment and impairment method as of September 30, 2017, December 31, 2016 and September 30, 2016: Three Months Ended September 30, 2017 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 669 $ 15,299 $ 33 $ 4,993 $ 581 $ 5,662 $ 747 $ 1,866 $ 7,283 $ 37,133 Provision charged to expense (19 ) (1 ) (14 ) 210 49 276 113 47 5 666 Losses charged off (6 ) (249 ) 0 (549 ) 0 (158 ) (53 ) (166 ) (1,262 ) (2,443 ) Recoveries 28 53 0 308 0 6 0 110 530 1,035 Ending balance $ 672 $ 15,102 $ 19 $ 4,962 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 36,391 Ending balance: Individually evaluated for impairment $ 25 $ 1,301 $ 0 $ 65 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,391 Collectively evaluated for impairment $ 647 $ 13,801 $ 19 $ 4,897 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 35,000 Loans Ending balance: Individually evaluated for impairment $ 4,766 $ 29,240 $ 0 $ 10,124 $ 873 $ 1,196 $ 0 $ 0 $ 0 $ 46,199 Collectively evaluated for impairment $ 69,516 $ 1,168,364 $ 3,290 $ 329,213 $ 63,568 $ 711,041 $ 96,755 $ 137,657 $ 487,818 $ 3,067,222 Nine Months Ended September 30, 2017 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 884 $ 14,191 $ 42 $ 4,656 $ 629 $ 6,027 $ 774 $ 1,885 $ 6,845 $ 35,933 Provision charged to expense (239 ) 1,622 (23 ) 1,229 0 1 87 243 1,739 4,659 Losses charged off (10 ) (776 ) 0 (1,386 ) 0 (321 ) (57 ) (675 ) (3,898 ) (7,123 ) Recoveries 37 65 0 463 1 79 3 404 1,870 2,922 Ending balance $ 672 $ 15,102 $ 19 $ 4,962 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 36,391 Ending balance: Individually evaluated for impairment $ 25 $ 1,301 $ 0 $ 65 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,391 Collectively evaluated for impairment $ 647 $ 13,801 $ 19 $ 4,897 $ 630 $ 5,786 $ 807 $ 1,857 $ 6,556 $ 35,000 Loans Ending balance: Individually evaluated for impairment $ 4,766 $ 29,240 $ 0 $ 10,124 $ 873 $ 1,196 $ 0 $ 0 $ 0 $ 46,199 Collectively evaluated for impairment $ 69,516 $ 1,168,364 $ 3,290 $ 329,213 $ 63,568 $ 711,041 $ 96,755 $ 137,657 $ 487,818 $ 3,067,222 Three Months Ended September 30, 2016 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 1,437 $ 14,438 $ 94 $ 4,430 $ 558 $ 6,372 $ 819 $ 1,634 $ 5,915 $ 35,697 Provision charged to expense 54 585 (28 ) 185 8 330 3 170 884 2,191 Losses charged off (79 ) (319 ) 0 (622 ) (61 ) (366 ) 0 (204 ) (1,311 ) (2,962 ) Recoveries 18 78 0 92 4 8 2 111 562 875 Ending balance $ 1,430 $ 14,782 $ 66 $ 4,085 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 35,801 Ending balance: Individually evaluated for impairment $ 212 $ 747 $ 0 $ 190 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,149 Collectively evaluated for impairment $ 1,218 $ 14,035 $ 66 $ 3,895 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 34,652 Loans Ending balance: Individually evaluated for impairment $ 5,938 $ 35,848 $ 0 $ 11,770 $ 0 $ 1,489 $ 0 $ 0 $ 0 $ 55,045 Collectively evaluated for impairment $ 62,337 $ 1,047,792 $ 6,242 $ 343,214 $ 55,412 $ 704,539 $ 89,467 $ 131,815 $ 435,436 $ 2,876,254 Nine Months Ended September 30, 2016 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 2,199 $ 14,434 $ 79 $ 4,225 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 36,094 Provision charged to expense (701 ) 1,726 (13 ) 1,156 144 440 (1 ) 669 2,409 5,829 Losses charged off (94 ) (1,505 ) 0 (1,667 ) (192 ) (849 ) (21 ) (893 ) (3,508 ) (8,729 ) Recoveries 26 127 0 371 7 75 7 341 1,653 2,607 Ending balance $ 1,430 $ 14,782 $ 66 $ 4,085 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 35,801 Ending balance: Individually evaluated for impairment $ 212 $ 747 $ 0 $ 190 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,149 Collectively evaluated for impairment $ 1,218 $ 14,035 $ 66 $ 3,895 $ 509 $ 6,344 $ 824 $ 1,711 $ 6,050 $ 34,652 Loans Ending balance: Individually evaluated for impairment $ 5,938 $ 35,848 $ 0 $ 11,770 $ 0 $ 1,489 $ 0 $ 0 $ 0 $ 55,045 Collectively evaluated for impairment $ 62,337 $ 1,047,792 $ 6,242 $ 343,214 $ 55,412 $ 704,539 $ 89,467 $ 131,815 $ 435,436 $ 2,876,254 December 31, 2016 (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Lease Financing Commercial Other Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total Allowance for loan losses Beginning balance $ 2,199 $ 14,434 $ 79 $ 4,225 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 36,094 Provision charged to expense (1,035 ) 1,220 (37 ) 2,128 264 291 (20 ) 912 4,149 7,872 Losses charged off (316 ) (1,641 ) 0 (2,136 ) (192 ) (1,043 ) (54 ) (1,236 ) (5,050 ) (11,668 ) Recoveries 36 178 0 439 7 101 9 615 2,250 3,635 Ending balance $ 884 $ 14,191 $ 42 $ 4,656 $ 629 $ 6,027 $ 774 $ 1,885 $ 6,845 $ 35,933 Ending balance: Individually evaluated for impairment $ 213 $ 1,035 $ 0 $ 65 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,313 Collectively evaluated for impairment $ 671 $ 13,156 $ 42 $ 4,591 $ 629 $ 6,027 $ 774 $ 1,885 $ 6,845 $ 34,620 Loans Ending balance: Individually evaluated for impairment $ 5,609 $ 33,756 $ 0 $ 11,354 $ 0 $ 1,483 $ 0 $ 0 $ 0 $ 52,202 Collectively evaluated for impairment $ 61,389 $ 1,051,672 $ 5,512 $ 338,805 $ 57,966 $ 701,486 $ 91,511 $ 133,093 $ 444,735 $ 2,886,169

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2017
Other Real Estate Owned [Abstract]
Activity for Other Real Estate Owned	Activity for other real estate owned was as follows: Three Months Ended Nine Months Ended September 30 September 30 (in thousands) 2017 2016 2017 2016 Beginning balance of other real estate owned $ 32,785 $ 37,740 $ 35,856 $ 40,674 New assets acquired 2,722 1,008 4,303 4,300 Capitalized costs 0 0 0 0 Fair value adjustments (884 ) (408 ) (2,871 ) (632 ) Sale of assets (2,575 ) (675 ) (5,240 ) (6,677 ) Ending balance of other real estate owned $ 32,048 $ 37,665 $ 32,048 $ 37,665
Major Classifications of Foreclosed Properties	The major classifications of foreclosed properties are shown in the following table: (in thousands) September 30 2017 December 31 2016 1-4 family $ 5,117 $ 6,210 Agricultural/farmland 68 93 Construction/land development/other 16,620 20,778 Multifamily 176 270 Non-farm/non-residential 10,067 8,505 Total foreclosed properties $ 32,048 $ 35,856

Repurchase Agreements (Tables)

Repurchase Agreements (Tables)	9 Months Ended
	Sep. 30, 2017
Repurchase Agreements [Abstract]
Remaining Contractual Maturity of Securities Sold Under Agreements to Repurchase by Class of Collateral Pledged	The remaining contractual maturity of the securities sold under agreements to repurchase by class of collateral pledged included in the accompanying consolidated balance sheets as of September 30, 2017 and December 31, 2016 is presented in the following tables: September 30, 2017 Remaining Contractual Maturity of the Agreements (in thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and U.S. Treasury and government agencies $ 31,171 $ 56,126 $ 0 $ 26,488 $ 113,785 State and political subdivisions 63,611 4,573 610 6,919 75,713 U.S. government sponsored agency mortgage-backed securities 21,630 36,301 116 12,462 70,509 Total $ 116,412 $ 97,000 $ 726 $ 45,869 $ 260,007 December 31, 2016 Remaining Contractual Maturity of the Agreements (in thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and U.S. Treasury and government agencies $ 17,249 $ 0 $ 14,349 $ 73,076 $ 104,674 State and political subdivisions 55,354 0 1,998 10,272 67,624 U.S. government sponsored agency mortgage-backed securities 23,386 0 8,003 47,378 78,767 Total $ 95,989 $ 0 $ 24,350 $ 130,726 $ 251,065

Fair Market Value of Financia24

Fair Market Value of Financial Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Market Value of Financial Assets and Liabilities [Abstract]
Fair Value Assets Measured on Recurring Basis	The following tables present the fair value measurements of assets recognized in the accompanying balance sheets measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016 and indicate the level within the fair value hierarchy of the valuation techniques. Fair Value Measurements at September 30, 2017 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – recurring basis Available-for-sale securities: U.S. Treasury and government agencies $ 217,858 $ 65,093 $ 152,765 $ 0 State and political subdivisions 136,657 0 136,657 0 U.S. government sponsored agenc y mortgage-backed securities 223,998 0 223,998 0 CRA investment funds 24,520 24,520 0 0 Mortgage servicing rights 3,283 0 0 3,283 Fair Value Measurements at December 31, 2016 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – recurring basis Available-for-sale securities: U.S. Treasury and government agencies $ 222,464 $ 44,934 $ 177,530 $ 0 State and political subdivisions 133,516 0 133,516 0 U.S. government sponsored agenc y mortgage-backed securities 225,056 0 225,056 0 CRA investment funds 24,358 24,358 0 0 Mortgage servicing rights 3,433 0 0 3,433
Reconciliation of the Beginning and Ending Balance of Recurring Fair Value Measurements Using Significant Unobservable (Level 3) Inputs	Following is a reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying balance sheet using significant unobservable (Level 3) inputs for the three and nine months ended September 30, 2017 and 2016: Mortgage Servicing Rights Three Months Ended Nine Months Ended September 30 September 30 (in thousands) 2017 2016 2017 2016 Beginning balance $ 3,304 $ 2,797 $ 3,433 $ 3,236 Total recognized gains (losses) Included in net income 5 118 (73 ) (422 ) Issues 98 167 269 388 Settlements (124 ) (118 ) (346 ) (238 ) Ending balance $ 3,283 $ 2,964 $ 3,283 $ 2,964 Total gains (losses) for the period included in net income attributable to the change in unrealized gains or losses related to assets still held at the reporting date $ 5 $ 118 $ (73 ) $ (422 )
Realized and Unrealized Gains and Losses for Items Included in Net Income in the Consolidated Statements of Income	Realized and unrealized gains and losses for items reflected in the table above are included in net income in the consolidated statements of income as follows: Noninterest Income Three Months Ended Nine Months Ended September 30 September 30 (in thousands) 2017 2016 2017 2016 Total losses $ (119 ) $ 0 $ (419 ) $ (660 )
Fair Value Measurements of Recognized Assets Measured on Nonrecurring Basis	The following tables present the fair value measurements of assets recognized in the accompanying balance sheets measured at fair value on a nonrecurring basis as of September 30, 2017 and December 31, 2016 and indicate the level within the fair value hierarchy of the valuation techniques. Fair Value Measurements at September 30, 2017 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – nonrecurring basis Impaired loans (collateral dependent) $ 1,732 $ 0 $ 0 $ 1,732 Other real estate/assets owned 18,843 0 0 18,843 Fair Value Measurements at December 31, 2016 Using (in thousands) Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets measured – nonrecurring basis Impaired loans (collateral dependent) $ 5,506 $ 0 $ 0 $ 5,506 Other real estate/assets owned 4,388 0 0 4,388
Quantitative Information About Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements	The following tables present quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements at September 30, 2017 and December 31, 2016. (in thousands) Quantitative Information about Level 3 Fair Value Measurements Fair Value at September 30, 2017 Valuation Technique(s) Unobservable Input Range (Weighted Average) Mortgage servicing rights $ 3,283 Discount cash flows, computer pricing model Constant prepayment rate 7.0% - 29.5% (10.6%) Probability of default 0.0% - 100.0% (3.3%) Discount rate 10.0% - 11.5% (10.1%) Impaired loans (collateral-dependent) $ 1,732 Market comparable properties Marketability discount 10.0% - 89.0% (40.4%) Other real estate/assets owned $ 18,843 Market comparable properties Comparability adjustments 6.0% - 68.7% (16.3%) (in thousands) Quantitative Information about Level 3 Fair Value Measurements Fair Value at December 31, 2016 Valuation Technique(s) Unobservable Input Range (Weighted Average) Mortgage servicing rights $ 3,433 Discount cash flows, computer pricing model Constant prepayment rate 7.0% - 27.0% (9.5%) Probability of default 0.0% - 100.0% (3.0%) Discount rate 10.0% - 11.5% (10.1%) Impaired loans (collateral-dependent) $ 5,506 Market comparable properties Marketability discount 0.0% - 100.0% (33.7%) Other real estate/assets owned $ 4,388 Market comparable properties Comparability adjustments 10.0% - 100.0% (14.9%)
Fair Value of Financial Instruments and Levels within the Fair Value Hierarchy of the Valuation Techniques	The following table presents estimated fair value of CTBI’s financial instruments as of September 30, 2017 and indicates the level within the fair value hierarchy of the valuation techniques. Fair Value Measurements at September 30, 2017 Using (in thousands) Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 166,416 $ 166,416 $ 0 $ 0 Certificates of deposit in other banks 11,270 0 11,244 0 Securities available-for-sale 603,033 89,613 513,420 0 Securities held-to-maturity 858 0 858 0 Loans held for sale 1,605 1,651 0 0 Loans, net 3,077,030 0 0 3,057,809 Federal Home Loan Bank stock 17,927 0 17,927 0 Federal Reserve Bank stock 4,887 0 4,887 0 Accrued interest receivable 12,920 0 12,920 0 Mortgage servicing rights 3,283 0 0 3,283 Financial liabilities: Deposits $ 3,200,366 $ 786,856 $ 2,410,741 $ 0 Repurchase agreements 260,007 0 0 260,044 Federal funds purchased 8,196 0 8,196 0 Advances from Federal Home Loan Bank 50,869 0 50,870 0 Long-term debt 59,341 0 0 49,073 Accrued interest payable 2,771 0 2,771 0 Unrecognized financial instruments: Letters of credit $ 0 $ 0 $ 0 $ 0 Commitments to extend credit 0 0 0 0 Forward sale commitments 0 0 0 0 The following table presents estimated fair value of CTBI’s financial instruments as of December 31, 2016 and indicates the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2016 Using Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial assets: Cash and cash equivalents $ 144,716 $ 144,716 $ 0 $ 0 Certificates of deposit in other banks 980 0 982 0 Securities available-for-sale 605,394 69,292 536,102 0 Securities held-to-maturity 866 0 867 0 Loans held for sale 1,244 1,260 0 0 Loans, net 2,902,438 0 0 2,882,348 Federal Home Loan Bank stock 17,927 0 17,927 0 Federal Reserve Bank stock 4,887 0 4,887 0 Accrued interest receivable 11,922 0 11,922 0 Mortgage servicing rights 3,433 0 0 3,433 Financial liabilities: Deposits $ 3,081,308 $ 767,918 $ 2,321,690 $ 0 Repurchase agreements 251,065 0 0 250,820 Federal funds purchased 4,816 0 4,816 0 Advances from Federal Home Loan Bank 944 0 1,009 0 Long-term debt 61,341 0 0 49,073 Accrued interest payable 1,200 0 1,200 0 Unrecognized financial instruments: Letters of credit $ 0 $ 0 $ 0 $ 0 Commitments to extend credit 0 0 0 0 Forward sale commitments 0 0 0 0

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended September 30 September 30 (in thousands except per share data) 2017 2016 2017 2016 Numerator: Net income $ 13,763 $ 12,312 $ 36,581 $ 35,480 Denominator: Basic earnings per share: Weighted average shares 17,633 17,554 17,625 17,532 Diluted earnings per share: Effect of dilutive stock options and restricted stock grants 20 15 20 16 Adjusted weighted average shares 17,653 17,569 17,645 17,548 Earnings per share: Basic earnings per share $ 0.78 $ 0.70 $ 2.08 $ 2.02 Diluted earnings per share 0.78 0.70 2.07 2.02

Accumulated Other Comprehensi26

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2017
Accumulated Other Comprehensive Income [Abstract]
Amounts Reclassified from Accumulated Other Comprehensive Income (AOCI)	Amounts reclassified from accumulated other comprehensive income (AOCI) and the affected line items in the statements of income during the three and nine months ended September 30, 2017 and 2016 were: Amounts Reclassified from AOCI (in thousands) Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Affected line item in the statements of income Securities gains $ 48 $ 458 $ 58 $ 522 Tax expense 17 160 20 183 Total reclassifications out of AOCI $ 31 $ 298 $ 38 $ 339

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2018USD ($)	Sep. 30, 2017PaymentQuarter
Loans [Abstract]
Past due period after which loans must be well secured and in the process of collection to continue accruing interest		90 days
Period of current principal and interest payments for reclassifying nonaccrual loans as accruing loans		6 months
Allowance for Loan and Lease Losses [Abstract]
Number of delinquent monthly payments before loan charge off | Payment		5
Current value assessment period for past due loans secured against real estate		90 days
Threshold period past due for initiation of foreclosure proceedings		120 days
Historical loan loss review period | Quarter		12
Minimum [Member]
Other Real Estate Owned [Abstract]
Typical frequency of periodic reviews		12 months
Maximum [Member]
Other Real Estate Owned [Abstract]
Typical frequency of periodic reviews		18 months
Frequency of periodic reviews in general		24 months
Commercial [Member] | Unsecured Commercial Loan [Member]
Allowance for Loan and Lease Losses [Abstract]
Charge off threshold for loans considered uncollectible		90 days
Consumer [Member] | Closed-End Consumer Loan [Member]
Allowance for Loan and Lease Losses [Abstract]
Charge off threshold for loans considered uncollectible		120 days
ASU 2017-08 [Member] | Scenario, Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction in retained earnings	$ (150)
ASU 2017-08 [Member] | Scenario, Forecast [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Quarterly increase in amortization expense	24
ASU 2017-08 [Member] | Scenario, Forecast [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Quarterly increase in amortization expense	$ 30

Stock-Based Compensation (Detai

Stock-Based Compensation (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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense			$ 447	$ 347
Black-Scholes option pricing model, weighted average assumptions [Abstract]
Expected dividend yield				3.70%
Risk-free interest rate				1.45%
Expected volatility				34.34%
Expected term				7 years 6 months
Weighted average fair value of options (in dollars per share)				$ 6.82
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 14	$ 15	42	$ 42
Unrecognized compensation expense related to unvested stock option awards	100		$ 100
Unrecognized compensation expense, weighted average period			2 years 7 months 6 days
Options granted to purchase shares of CTBI common stock (in shares)			0	10,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	131	97	$ 405	$ 305
Dividend paid on stock based compensation	13	$ 9	$ 40	$ 28
Unrecognized compensation expense, weighted average period			3 years 1 month 6 days
Unrecognized compensation expense related to restricted stock grants	$ 1,300		$ 1,300
Granted (in shares)	0	0	23,668	18,069
2015 Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years
2015 Plan [Member] | Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of certain participant employee termination events following change in control for restriction on restricted stock granted to lapse			24 months
2015 Plan [Member] | Granted In 2017 [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			5,000
Award vesting period			5 years

Securities, Amortized Cost and

Securities, Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale debt securities [Abstract]
Amortized cost	$ 579,413	$ 583,939
Gross unrealized gains	3,500	3,158
Gross unrealized losses	(4,400)	(6,061)
Fair value	578,513	581,036
Available-for-sale [Abstract]
Amortized cost	604,413	608,939
Gross unrealized gains	3,593	3,234
Gross unrealized losses	(4,973)	(6,779)
Fair value	603,033	605,394
Held-to-maturity [Abstract]
Amortized cost	858	866
Gross unrealized gains	0	1
Gross unrealized losses	0	0
Fair value	858	867
U.S. Treasury and Government Agencies [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	218,107	223,014
Gross unrealized gains	239	193
Gross unrealized losses	(488)	(743)
Fair value	217,858	222,464
State and Political Subdivisions [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	134,840	133,351
Gross unrealized gains	2,670	1,957
Gross unrealized losses	(853)	(1,792)
Fair value	136,657	133,516
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	226,466	227,574
Gross unrealized gains	591	1,008
Gross unrealized losses	(3,059)	(3,526)
Fair value	223,998	225,056
CRA Investments Funds [Member]
Available-for-sale equity securities [Abstract]
Amortized cost	25,000	25,000
Gross unrealized gains	93	76
Gross unrealized losses	(573)	(718)
Fair value	24,520	24,358
State and Political Subdivisions [Member]
Held-to-maturity [Abstract]
Amortized cost	858	866
Gross unrealized gains	0	1
Gross unrealized losses	0	0
Fair value	$ 858	$ 867

Securities, Amortized Cost an30

Securities, Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale, amortized cost [Abstract]
Due in one year or less	$ 58,967
Due after one through five years	128,058
Due after five through ten years	40,962
Due after ten years	124,960
U.S. government sponsored agency mortgage-backed securities	226,466
Amortized cost	579,413	$ 583,939
CRA investment funds	25,000
Amortized cost	604,413	608,939
Available-for-sale, fair value [Abstract]
Due in one year or less	58,968
Due after one through five years	128,883
Due after five through ten years	41,804
Due after ten years	124,860
U.S. government sponsored agency mortgage-backed securities	223,998
Total debt securities	578,513	581,036
CRA investment funds	24,520
Total securities	603,033	605,394
Held-to-maturity, amortized cost [Abstract]
Due in one year or less	0
Due after one through five years	858
Due after five through ten years	0
Due after ten years	0
U.S. government sponsored agency mortgage-backed securities	0
Amortized cost	858	866
CRA investment funds	0
Total securities	858
Held-to-maturity, fair value [Abstract]
Due in one year or less	0
Due after one through five years	858
Due after five through ten years	0
Due after ten years	0
U.S. government sponsored agency mortgage-backed securities	0
Total debt securities	858	$ 867
CRA investment funds	0
Total securities	$ 858

Securities, Gains (Loss) on Sal

Securities, Gains (Loss) on Sales of Securities, Securities Pledged, and Securities Sold Under Agreements to Repurchase (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
Securities [Abstract]
Net gains realized on sales and calls of AFS securities	$ 48	$ 458	$ 58	$ 522
Realized pre-tax gain on sales and calls of AFS securities	150	460	179	529
Realized pre-tax loss on sales and calls of AFS securities	102	$ 2	121	$ 7
Securities pledged as collateral to secure public deposit and for other purposes	222,000		222,000		$ 221,200
Amortized cost of securities sold under agreements to repurchase	$ 269,400		$ 269,400		$ 303,500

Securities, Securities in Conti

Securities, Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Securities [Abstract]
Percentage of total investment with unrealized losses	66.50%	65.60%
Available-for-sale, amortized cost [Abstract]
Less than 12 months	$ 242,561	$ 365,662
12 months or more	164,103	38,763
Total	406,664	404,425
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(1,099)	(5,586)
12 months or more	(3,874)	(1,193)
Total	(4,973)	(6,779)
Available-for-sale, fair value [Abstract]
Less than 12 months	241,462	360,076
12 months or more	160,229	37,570
Total	401,691	397,646
U.S. Treasury and Government Agencies [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	143,007	158,732
12 months or more	21,559	1,880
Total	164,566	160,612
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(471)	(716)
12 months or more	(17)	(27)
Total	(488)	(743)
Available-for-sale, fair value [Abstract]
Less than 12 months	142,536	158,016
12 months or more	21,542	1,853
Total	164,078	159,869
State and Political Subdivisions [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	20,141	53,491
12 months or more	13,832	751
Total	33,973	54,242
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(236)	(1,780)
12 months or more	(617)	(12)
Total	(853)	(1,792)
Available-for-sale, fair value [Abstract]
Less than 12 months	19,905	51,711
12 months or more	13,215	739
Total	33,120	52,450
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	71,913	135,939
12 months or more	113,712	31,132
Total	185,625	167,071
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(336)	(2,646)
12 months or more	(2,723)	(880)
Total	(3,059)	(3,526)
Available-for-sale, fair value [Abstract]
Less than 12 months	71,577	133,293
12 months or more	110,989	30,252
Total	182,566	163,545
Debt Securities [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	235,061	348,162
12 months or more	149,103	33,763
Total	384,164	381,925
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(1,043)	(5,142)
12 months or more	(3,357)	(919)
Total	(4,400)	(6,061)
Available-for-sale, fair value [Abstract]
Less than 12 months	234,018	343,020
12 months or more	145,746	32,844
Total	379,764	375,864
CRA Investments Funds [Member]
Available-for-sale, amortized cost [Abstract]
Less than 12 months	7,500	17,500
12 months or more	15,000	5,000
Total	22,500	22,500
Available-for-sale, gross unrealized losses [Abstract]
Less than 12 months	(56)	(444)
12 months or more	(517)	(274)
Total	(573)	(718)
Available-for-sale, fair value [Abstract]
Less than 12 months	7,444	17,056
12 months or more	14,483	4,726
Total	21,927	21,782
Available-for-sale equity securities [Abstract]
Fair value	24,520	24,358
Gross unrealized losses	$ (573)	$ (718)
Severity of impairment in percentage of fair value less than cost	2.30%
CRA Investments Funds [Member] | Fixed Income Mutual Funds [Member]
Available-for-sale equity securities [Abstract]
Fair value	$ 24,500
Gross unrealized losses	$ (480)

Loans, Major Classifications of

Loans, Major Classifications of Loans, Net of Income and Deferred Loan Origination Cost (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)Segment	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 3,113,421	$ 2,938,371
Number of portfolio segments | Segment	9
Loans held for sale [Abstract]
Loans held for sale	$ 1,605	1,244
Commercial [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	74,282	66,998
Commercial [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,197,604	1,085,428
Commercial [Member] | Equipment Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,290	5,512
Commercial [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	339,337	350,159
Residential [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	64,441	57,966
Residential [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	712,237	702,969
Residential [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	96,755	91,511
Consumer [Member] | Consumer Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	137,657	133,093
Consumer [Member] | Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 487,818	$ 444,735

Loans, Nonaccrual Loans Segrega

Loans, Nonaccrual Loans Segregated by Class of Loans and Loan Portfolio Aging Analysis, Segregated by Class (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		$ 19,798	$ 16,623
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		45,080	42,089
Current		3,068,341	2,896,282
Total Loans		3,113,421	2,938,371
90+ and Accruing	[1]	10,222	10,847
Minimum threshold amount of loans requiring performance bond		500
30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		10,605	10,242
60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		8,448	7,324
90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		$ 26,027	24,523
Equipment Lease Financing [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Financing percentage requested for underwriting loans		100.00%
Commercial [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Loans		$ 1,614,513	1,508,097
Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		1,311	1,912
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,422	1,962
Current		72,860	65,036
Total Loans		74,282	66,998
90+ and Accruing	[1]	0	28
Commercial [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		69	22
Commercial [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		42	0
Commercial [Member] | Construction [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,311	1,940
Commercial [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		7,879	6,326
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		13,152	11,358
Current		1,184,452	1,074,070
Total Loans		1,197,604	1,085,428
90+ and Accruing	[1]	1,518	3,015
Commercial [Member] | Real Estate [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		3,549	2,033
Commercial [Member] | Real Estate [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,287	478
Commercial [Member] | Real Estate [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		8,316	8,847
Commercial [Member] | Equipment Lease Financing [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		0	0
Current		3,290	5,512
Total Loans		3,290	5,512
90+ and Accruing	[1]	0	0
Commercial [Member] | Equipment Lease Financing [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		0	0
Commercial [Member] | Equipment Lease Financing [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		0	0
Commercial [Member] | Equipment Lease Financing [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		0	0
Commercial [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		1,070	1,559
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		2,110	2,354
Current		337,227	347,805
Total Loans		339,337	350,159
90+ and Accruing	[1]	307	141
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		773	997
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		203	122
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,134	1,235
Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		1,062	11
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		870	901
Current		63,571	57,065
Total Loans		64,441	57,966
90+ and Accruing	[1]	155	152
Residential [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		144	707
Residential [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		382	42
Residential [Member] | Construction [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		344	152
Residential [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		7,915	6,260
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		19,856	17,466
Current		692,381	685,503
Total Loans		712,237	702,969
90+ and Accruing	[1]	7,389	6,295
Residential [Member] | Real Estate [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,005	1,493
Residential [Member] | Real Estate [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		5,205	5,278
Residential [Member] | Real Estate [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		13,646	10,695
Residential [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		561	555
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,691	2,022
Current		95,064	89,489
Total Loans		96,755	91,511
90+ and Accruing	[1]	333	467
Residential [Member] | Home Equity [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		685	829
Residential [Member] | Home Equity [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		250	288
Residential [Member] | Home Equity [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		756	905
Consumer [Member] | Consumer Direct [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,118	1,206
Current		136,539	131,887
Total Loans		137,657	133,093
90+ and Accruing	[1]	156	68
Consumer [Member] | Consumer Direct [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		810	873
Consumer [Member] | Consumer Direct [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		152	265
Consumer [Member] | Consumer Direct [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		156	68
Consumer [Member] | Consumer Indirect [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		4,861	4,820
Current		482,957	439,915
Total Loans		487,818	444,735
90+ and Accruing	[1]	364	681
Consumer [Member] | Consumer Indirect [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		3,570	3,288
Consumer [Member] | Consumer Indirect [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		927	851
Consumer [Member] | Consumer Indirect [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		$ 364	$ 681
[1]	90+ and Accruing are also included in 90+ Days Past Due column.

Loans, Credit Risk Profile Base

Loans, Credit Risk Profile Based on Rating Category and Payment Activity and on Performing and Nonperforming Status, Segregated by Class (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		$ 3,113,421	$ 2,938,371
Consumer mortgage loans secured by real estate properties for which formal foreclosure proceedings are in process		4,800	3,500
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,614,513	1,508,097
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		$ 1,420,360	1,335,205
Commercial [Member] | Pass [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Review period for loans		12 months
Commercial [Member] | Pass [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Review period for loans		18 months
Commercial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		$ 101,901	88,215
Commercial [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		25,450	36,389
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		66,048	47,136
Commercial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		754	1,152
Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		74,282	66,998
Commercial [Member] | Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		64,983	55,315
Commercial [Member] | Construction [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		3,566	3,366
Commercial [Member] | Construction [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,657	2,535
Commercial [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		3,898	5,592
Commercial [Member] | Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		178	190
Commercial [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,197,604	1,085,428
Commercial [Member] | Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,059,574	975,383
Commercial [Member] | Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		67,065	51,932
Commercial [Member] | Real Estate [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		21,676	25,772
Commercial [Member] | Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		49,072	31,945
Commercial [Member] | Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		217	396
Commercial [Member] | Equipment Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		3,290	5,512
Commercial [Member] | Equipment Leases [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		3,229	5,206
Commercial [Member] | Equipment Leases [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		0	137
Commercial [Member] | Equipment Leases [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		61	169
Commercial [Member] | Equipment Leases [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		0	0
Commercial [Member] | Equipment Leases [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		0	0
Commercial [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		339,337	350,159
Commercial [Member] | Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		292,574	299,301
Commercial [Member] | Other [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		31,270	32,780
Commercial [Member] | Other [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		2,056	7,913
Commercial [Member] | Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		13,078	9,599
Commercial [Member] | Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		359	566
Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		64,441	57,966
Residential [Member] | Construction [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		63,224	57,803
Residential [Member] | Construction [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	1,217	163
Residential [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		712,237	702,969
Residential [Member] | Real Estate [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		696,933	690,414
Residential [Member] | Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	15,304	12,555
Residential [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		96,755	91,511
Residential [Member] | Home Equity [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		95,861	90,489
Residential [Member] | Home Equity [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	894	1,022
Consumer [Member] | Consumer Direct [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		137,657	133,093
Consumer [Member] | Consumer Direct [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		137,501	133,025
Consumer [Member] | Consumer Direct [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	156	68
Consumer [Member] | Consumer Indirect [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		487,818	444,735
Consumer [Member] | Consumer Indirect [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		487,454	444,054
Consumer [Member] | Consumer Indirect [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	364	681
Residential and Consumer Portfolio Segments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,498,908	1,430,274
Residential and Consumer Portfolio Segments [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,480,973	1,415,785
Residential and Consumer Portfolio Segments [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	$ 17,935	$ 14,489
[1]	A loan is considered nonperforming if it is 90 days or more past due and/or on nonaccrual.

Loans, Impaired Loans, Average

Loans, Impaired Loans, Average Investments in Impaired Loans, and Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loans with a specific valuation allowance [Abstract]
Specific Allowance		$ 1,391	$ 1,149	$ 1,391	$ 1,149	$ 1,313
Total impaired loans [Abstract]
Recorded balance		46,199	55,045	46,199	55,045	52,202
Unpaid Contractual Principal Balance		49,740	58,743	49,740	58,743	55,888
Specific Allowance		1,391	1,149	1,391	1,149	1,313
Average Investment in Impaired Loans		46,629	55,572	49,684	56,646	55,679
Interest Income Recognized	[1]	460	622	1,550	1,866	2,530
Commercial [Member] | Construction [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		4,613	4,270	4,613	4,270	4,102
Unpaid Contractual Principal Balance		4,621	4,293	4,621	4,293	4,123
Average Investment in Impaired Loans		4,662	4,299	4,955	4,450	4,367
Interest Income Recognized	[1]	50	63	136	168	218
Loans with a specific valuation allowance [Abstract]
Recorded Balance		153	1,668	153	1,668	1,507
Unpaid Contractual Principal Balance		174	1,670	174	1,670	1,509
Specific Allowance		25	212	25	212	213
Average Investment in Impaired Loans		153	1,798	156	2,524	2,290
Interest Income Recognized	[1]	0	0	0	0	0
Total impaired loans [Abstract]
Recorded balance		4,766	5,938	4,766	5,938	5,609
Unpaid Contractual Principal Balance		4,795	5,963	4,795	5,963	5,632
Specific Allowance		25	212	25	212	213
Average Investment in Impaired Loans		4,815	6,097	5,111	6,974	6,657
Interest Income Recognized	[1]	50	63	136	168	218
Commercial [Member] | Real Estate [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		25,322	32,311	25,322	32,311	29,025
Unpaid Contractual Principal Balance		25,916	33,004	25,916	33,004	29,594
Average Investment in Impaired Loans		25,452	32,534	27,318	31,795	31,136
Interest Income Recognized	[1]	276	390	980	1,164	1,609
Loans with a specific valuation allowance [Abstract]
Recorded Balance		3,918	3,537	3,918	3,537	4,731
Unpaid Contractual Principal Balance		5,023	4,688	5,023	4,688	5,885
Specific Allowance		1,301	747	1,301	747	1,035
Average Investment in Impaired Loans		3,984	3,547	4,236	3,957	4,151
Interest Income Recognized	[1]	3	1	8	19	19
Total impaired loans [Abstract]
Recorded balance		29,240	35,848	29,240	35,848	33,756
Unpaid Contractual Principal Balance		30,939	37,692	30,939	37,692	35,479
Specific Allowance		1,301	747	1,301	747	1,035
Average Investment in Impaired Loans		29,436	36,081	31,554	35,752	35,287
Interest Income Recognized	[1]	279	391	988	1,183	1,628
Commercial [Member] | Equipment Lease Financing [Member]
Loans without a specific valuation allowance [Abstract]
Average Investment in Impaired Loans		0		45
Interest Income Recognized	[1]	0		0
Total impaired loans [Abstract]
Average Investment in Impaired Loans		0		45
Interest Income Recognized	[1]	0		0
Commercial [Member] | Other [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		9,994	11,382	9,994	11,382	11,215
Unpaid Contractual Principal Balance		11,804	13,191	11,804	13,191	13,155
Average Investment in Impaired Loans		10,191	11,497	10,717	11,564	11,561
Interest Income Recognized	[1]	123	153	396	470	632
Loans with a specific valuation allowance [Abstract]
Recorded Balance		130	388	130	388	139
Unpaid Contractual Principal Balance		133	408	133	408	139
Specific Allowance		65	190	65	190	65
Average Investment in Impaired Loans		130	405	87	597	483
Interest Income Recognized	[1]	0	0	0	0	0
Total impaired loans [Abstract]
Recorded balance		10,124	11,770	10,124	11,770	11,354
Unpaid Contractual Principal Balance		11,937	13,599	11,937	13,599	13,294
Specific Allowance		65	190	65	190	65
Average Investment in Impaired Loans		10,321	11,902	10,804	12,161	12,044
Interest Income Recognized	[1]	123	153	396	470	632
Residential [Member] | Construction [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		873		873
Unpaid Contractual Principal Balance		873		873
Average Investment in Impaired Loans		860		569
Interest Income Recognized	[1]	0		0
Loans with a specific valuation allowance [Abstract]
Specific Allowance		0		0
Total impaired loans [Abstract]
Recorded balance		873		873
Unpaid Contractual Principal Balance		873		873
Specific Allowance		0		0
Average Investment in Impaired Loans		860		569
Interest Income Recognized	[1]	0		0
Residential [Member] | Real Estate [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		1,196	1,489	1,196	1,489	1,483
Unpaid Contractual Principal Balance		1,196	1,489	1,196	1,489	1,483
Average Investment in Impaired Loans		1,197	1,492	1,601	1,759	1,691
Interest Income Recognized	[1]	8	15	30	45	52
Loans with a specific valuation allowance [Abstract]
Specific Allowance		0	0	0	0	0
Total impaired loans [Abstract]
Recorded balance		1,196	1,489	1,196	1,489	1,483
Unpaid Contractual Principal Balance		1,196	1,489	1,196	1,489	1,483
Specific Allowance		0	0	0	0	0
Average Investment in Impaired Loans		1,197	1,492	1,601	1,759	1,691
Interest Income Recognized	[1]	$ 8	$ 15	$ 30	$ 45	$ 52
[1]	Cash basis interest is substantially the same as interest income recognized.

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructurings Segregated by Class (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)Loan	Sep. 30, 2016USD ($)Loan	Sep. 30, 2017USD ($)Loan	Sep. 30, 2016USD ($)Loan	Dec. 31, 2016USD ($)Loan
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	7	2	25	45	43
Post-Modification Outstanding Balance	$ 397	$ 152	$ 2,722	$ 13,070	$ 16,152
Commitment to extend additional credit on loans modified in TDRs	$ 100		$ 100
Defaulted restructured loans, number of loans | Loan	3	2	3	4
Defaulted restructured loans, recorded balance	$ 1,807	$ 1,460	$ 1,807	$ 2,328
Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	397	152	2,280	12,210	15,203
Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0	0	0	0
Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 0	$ 0	$ 442	$ 860	$ 949
Commercial [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan			2	5	1
Post-Modification Outstanding Balance			$ 114	$ 1,408	$ 1,288
Commercial [Member] | Construction [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			0	1,408	1,288
Commercial [Member] | Construction [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			0	0	0
Commercial [Member] | Construction [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			$ 114	$ 0	$ 0
Commercial [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	6	2	11	23	27
Post-Modification Outstanding Balance	$ 295	$ 152	$ 1,066	$ 6,341	$ 9,408
Defaulted restructured loans, number of loans | Loan	2	1	2	2
Defaulted restructured loans, recorded balance	$ 961	$ 1,446	$ 961	$ 1,956
Commercial [Member] | Real Estate [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	295	152	874	5,761	8,827
Commercial [Member] | Real Estate [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0	0	0	0
Commercial [Member] | Real Estate [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 0	$ 0	$ 192	$ 580	$ 581
Commercial [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	1		10	16	14
Post-Modification Outstanding Balance	$ 102		$ 373	$ 5,041	$ 5,175
Defaulted restructured loans, number of loans | Loan		1		2
Defaulted restructured loans, recorded balance		$ 14		$ 372
Commercial [Member] | Other [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	102		237	5,041	5,088
Commercial [Member] | Other [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0		0	0	0
Commercial [Member] | Other [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 0		$ 136	$ 0	$ 87
Residential [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan			1
Post-Modification Outstanding Balance			$ 846
Defaulted restructured loans, number of loans | Loan			1
Defaulted restructured loans, recorded balance			$ 846
Residential [Member] | Construction [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			846
Residential [Member] | Construction [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			0
Residential [Member] | Construction [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			$ 0
Residential [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan			1	1	1
Post-Modification Outstanding Balance			$ 323	$ 280	$ 281
Defaulted restructured loans, number of loans | Loan	1
Defaulted restructured loans, recorded balance	$ 846
Residential [Member] | Real Estate [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			323	0	0
Residential [Member] | Real Estate [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			0	0	0
Residential [Member] | Real Estate [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance			$ 0	$ 280	$ 281

Allowance for Loan and Lease 38

Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Allowance for loan losses [Roll Forward]
Beginning balance	$ 37,133	$ 35,697	$ 35,933	$ 36,094	$ 36,094
Provision charged to expense	666	2,191	4,659	5,829	7,872
Losses charged off	(2,443)	(2,962)	(7,123)	(8,729)	(11,668)
Recoveries	1,035	875	2,922	2,607	3,635
Ending balance	36,391	35,801	36,391	35,801	35,933
Ending balance [Abstract]
Individually evaluated for impairment	1,391	1,149	1,391	1,149	1,313
Collectively evaluated for impairment	35,000	34,652	35,000	34,652	34,620
Loans ending balance [Abstract]
Individually evaluated for impairment	46,199	55,045	46,199	55,045	52,202
Collectively evaluated for impairment	3,067,222	2,876,254	3,067,222	2,876,254	2,886,169
Commercial [Member] | Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	669	1,437	884	2,199	2,199
Provision charged to expense	(19)	54	(239)	(701)	(1,035)
Losses charged off	(6)	(79)	(10)	(94)	(316)
Recoveries	28	18	37	26	36
Ending balance	672	1,430	672	1,430	884
Ending balance [Abstract]
Individually evaluated for impairment	25	212	25	212	213
Collectively evaluated for impairment	647	1,218	647	1,218	671
Loans ending balance [Abstract]
Individually evaluated for impairment	4,766	5,938	4,766	5,938	5,609
Collectively evaluated for impairment	69,516	62,337	69,516	62,337	61,389
Commercial [Member] | Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	15,299	14,438	14,191	14,434	14,434
Provision charged to expense	(1)	585	1,622	1,726	1,220
Losses charged off	(249)	(319)	(776)	(1,505)	(1,641)
Recoveries	53	78	65	127	178
Ending balance	15,102	14,782	15,102	14,782	14,191
Ending balance [Abstract]
Individually evaluated for impairment	1,301	747	1,301	747	1,035
Collectively evaluated for impairment	13,801	14,035	13,801	14,035	13,156
Loans ending balance [Abstract]
Individually evaluated for impairment	29,240	35,848	29,240	35,848	33,756
Collectively evaluated for impairment	1,168,364	1,047,792	1,168,364	1,047,792	1,051,672
Commercial [Member] | Equipment Lease Financing [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	33	94	42	79	79
Provision charged to expense	(14)	(28)	(23)	(13)	(37)
Losses charged off	0	0	0	0	0
Recoveries	0	0	0	0	0
Ending balance	19	66	19	66	42
Ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	19	66	19	66	42
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	3,290	6,242	3,290	6,242	5,512
Commercial [Member] | Other [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	4,993	4,430	4,656	4,225	4,225
Provision charged to expense	210	185	1,229	1,156	2,128
Losses charged off	(549)	(622)	(1,386)	(1,667)	(2,136)
Recoveries	308	92	463	371	439
Ending balance	4,962	4,085	4,962	4,085	4,656
Ending balance [Abstract]
Individually evaluated for impairment	65	190	65	190	65
Collectively evaluated for impairment	4,897	3,895	4,897	3,895	4,591
Loans ending balance [Abstract]
Individually evaluated for impairment	10,124	11,770	10,124	11,770	11,354
Collectively evaluated for impairment	329,213	343,214	329,213	343,214	338,805
Residential [Member] | Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	581	558	629	550	550
Provision charged to expense	49	8	0	144	264
Losses charged off	0	(61)	0	(192)	(192)
Recoveries	0	4	1	7	7
Ending balance	630	509	630	509	629
Ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	630	509	630	509	629
Loans ending balance [Abstract]
Individually evaluated for impairment	873	0	873	0	0
Collectively evaluated for impairment	63,568	55,412	63,568	55,412	57,966
Residential [Member] | Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	5,662	6,372	6,027	6,678	6,678
Provision charged to expense	276	330	1	440	291
Losses charged off	(158)	(366)	(321)	(849)	(1,043)
Recoveries	6	8	79	75	101
Ending balance	5,786	6,344	5,786	6,344	6,027
Ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	5,786	6,344	5,786	6,344	6,027
Loans ending balance [Abstract]
Individually evaluated for impairment	1,196	1,489	1,196	1,489	1,483
Collectively evaluated for impairment	711,041	704,539	711,041	704,539	701,486
Residential [Member] | Home Equity [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	747	819	774	839	839
Provision charged to expense	113	3	87	(1)	(20)
Losses charged off	(53)	0	(57)	(21)	(54)
Recoveries	0	2	3	7	9
Ending balance	807	824	807	824	774
Ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	807	824	807	824	774
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	96,755	89,467	96,755	89,467	91,511
Consumer [Member] | Consumer Direct [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,866	1,634	1,885	1,594	1,594
Provision charged to expense	47	170	243	669	912
Losses charged off	(166)	(204)	(675)	(893)	(1,236)
Recoveries	110	111	404	341	615
Ending balance	1,857	1,711	1,857	1,711	1,885
Ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	1,857	1,711	1,857	1,711	1,885
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	137,657	131,815	137,657	131,815	133,093
Consumer [Member] | Consumer Indirect [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	7,283	5,915	6,845	5,496	5,496
Provision charged to expense	5	884	1,739	2,409	4,149
Losses charged off	(1,262)	(1,311)	(3,898)	(3,508)	(5,050)
Recoveries	530	562	1,870	1,653	2,250
Ending balance	6,556	6,050	6,556	6,050	6,845
Ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	6,556	6,050	6,556	6,050	6,845
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	$ 487,818	$ 435,436	$ 487,818	$ 435,436	$ 444,735

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Activity for other real estate owned [Roll Forward]
Beginning balance of other real estate owned	$ 32,785	$ 37,740	$ 35,856	$ 40,674
New assets acquired	2,722	1,008	4,303	4,300
Capitalized costs	0	0	0	0
Fair value adjustments	(884)	(408)	(2,871)	(632)
Sale of assets	(2,575)	(675)	(5,240)	(6,677)
Ending balance of other real estate owned	32,048	37,665	32,048	37,665
Carrying cost and fair value adjustments for foreclosed properties	$ 1,300	$ 900	$ 4,100	$ 1,900

Other Real Estate Owned, Major

Other Real Estate Owned, Major Classifications of Foreclosed Properties (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	$ 32,048	$ 35,856
1-4 Family [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	5,117	6,210
Agricultural/Farmland [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	68	93
Construction/Land Development/Other [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	16,620	20,778
Multifamily [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	176	270
Non-farm/Non-residential [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	$ 10,067	$ 8,505

Repurchase Agreements (Details)

Repurchase Agreements (Details) - Securities Sold under Agreements to Repurchase [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Carrying value of investment securities available for sale pledged as collateral under repurchase agreements	$ 296,800	$ 302,300
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	260,007	251,065
Overnight and Continuous [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	116,412	95,989
Up to 30 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	97,000	0
30-90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	726	24,350
Greater Than 90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	45,869	130,726
U.S. Treasury and Government Agencies [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	113,785	104,674
U.S. Treasury and Government Agencies [Member] | Overnight and Continuous [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	31,171	17,249
U.S. Treasury and Government Agencies [Member] | Up to 30 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	56,126	0
U.S. Treasury and Government Agencies [Member] | 30-90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	14,349
U.S. Treasury and Government Agencies [Member] | Greater Than 90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	26,488	73,076
State and Political Subdivisions [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	75,713	67,624
State and Political Subdivisions [Member] | Overnight and Continuous [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	63,611	55,354
State and Political Subdivisions [Member] | Up to 30 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	4,573	0
State and Political Subdivisions [Member] | 30-90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	610	1,998
State and Political Subdivisions [Member] | Greater Than 90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	6,919	10,272
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	70,509	78,767
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Overnight and Continuous [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	21,630	23,386
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Up to 30 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	36,301	0
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | 30-90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	116	8,003
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Greater Than 90 Days [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	$ 12,462	$ 47,378

Fair Market Value of Financia42

Fair Market Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 603,033	$ 605,394		$ 603,033		$ 605,394
Reconciliation of beginning and ending balances of recurring fair value measurements recognized in balance sheet using significant unobservable (Level 3) inputs [Roll Forward]
Total losses	(119)		$ 0	$ (419)	$ (660)
Minimum [Member]
Other real estate owned [Abstract]
Typical frequency of periodic reviews				12 months
Maximum [Member]
Other real estate owned [Abstract]
Typical frequency of periodic reviews				18 months
Frequency of periodic reviews in general				24 months
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	89,613	69,292		$ 89,613		69,292
Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	513,420	536,102		513,420		536,102
Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	3,283	3,433		3,283		3,433
Recurring [Member] | Fair Value [Member] | U.S. Treasury and Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	217,858	222,464		217,858		222,464
Recurring [Member] | Fair Value [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	136,657	133,516		136,657		133,516
Recurring [Member] | Fair Value [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	223,998	225,056		223,998		225,056
Recurring [Member] | Fair Value [Member] | CRA Investments Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,520	24,358		24,520		24,358
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0		0		0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member] | U.S. Treasury and Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	65,093	44,934		65,093		44,934
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member] | CRA Investments Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,520	24,358		24,520		24,358
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0		0		0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member] | U.S. Treasury and Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	152,765	177,530		152,765		177,530
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	136,657	133,516		136,657		133,516
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	223,998	225,056		223,998		225,056
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member] | CRA Investments Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	3,283	3,433		3,283		3,433
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member] | U.S. Treasury and Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member] | CRA Investments Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0		0		0
Recurring [Member] | Mortgage Servicing Rights [Member]
Reconciliation of beginning and ending balances of recurring fair value measurements recognized in balance sheet using significant unobservable (Level 3) inputs [Roll Forward]
Beginning balance	3,304	2,964	2,797	3,433	3,236	3,236
Total recognized gains (losses) Included in net income	5		118	(73)	(422)
Issues	98		167	269	388
Settlements	(124)		(118)	(346)	(238)
Ending balance	3,283	3,433	2,964	3,283	2,964	3,433
Total gains (losses) for the period included in net income attributable to the change in unrealized gains or losses related to assets still held at the reporting date	5		118	(73)	(422)
Nonrecurring [Member]
Impaired loan (collateral dependent) [Abstract]
Impaired loans, fair value adjustments	300	300	300	700	600	600
Other real estate owned [Abstract]
Other real estate /assets owned, fair value adjustment	900	600	$ 400	2,900	$ 600	1,200
Nonrecurring [Member] | Fair Value [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	1,732	5,506		1,732		5,506
Other real estate /assets owned	18,843	4,388		18,843		4,388
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	0	0		0		0
Other real estate /assets owned	0	0		0		0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	0	0		0		0
Other real estate /assets owned	0	0		0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	1,732	5,506		1,732		5,506
Other real estate /assets owned	$ 18,843	$ 4,388		$ 18,843		$ 4,388

Fair Market Value of Financia43

Fair Market Value of Financial Assets and Liabilities, Quantitative Information about Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Mortgage Servicing Rights [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	7.00%	7.00%
Probability of default	0.00%	0.00%
Discount rate	10.00%	10.00%
Mortgage Servicing Rights [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	29.50%	27.00%
Probability of default	100.00%	100.00%
Discount rate	11.50%	11.50%
Mortgage Servicing Rights [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	10.60%	9.50%
Probability of default	3.30%	3.00%
Discount rate	10.10%	10.10%
Mortgage Servicing Rights [Member] | Discount Cash Flows, Computer Pricing Model [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 3,283	$ 3,433
Impaired Loans (Collateral Dependent) [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Unobservable inputs [Abstract]
Marketability discount	10.00%	0.00%
Impaired Loans (Collateral Dependent) [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Unobservable inputs [Abstract]
Marketability discount	89.00%	100.00%
Impaired Loans (Collateral Dependent) [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Unobservable inputs [Abstract]
Marketability discount	40.40%	33.70%
Impaired Loans (Collateral Dependent) [Member] | Market Comparable Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 1,732	$ 5,506
Other Real Estate/Assets Owned [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Unobservable inputs [Abstract]
Comparability adjustments	6.00%	10.00%
Other Real Estate/Assets Owned [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Unobservable inputs [Abstract]
Comparability adjustments	68.70%	100.00%
Other Real Estate/Assets Owned [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Unobservable inputs [Abstract]
Comparability adjustments	16.30%	14.90%
Other Real Estate/Assets Owned [Member] | Market Comparable Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 18,843	$ 4,388

Fair Market Value of Financia44

Fair Market Value of Financial Assets and Liabilities, Estimated Fair Value of Financial Instruments and Indication of Level Within Fair Value Hierarchy of Valuation Techniques (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets [Abstract]
Available-for-sale securities	$ 603,033	$ 605,394
Securities held-to-maturity	858	867
Mortgage servicing rights	3,283	3,433
Carrying Amount [Member]
Financial assets [Abstract]
Cash and cash equivalents	166,416	144,716
Certificates of deposits in other banks	11,270	980
Available-for-sale securities	603,033	605,394
Securities held-to-maturity	858	866
Loans held for sale	1,605	1,244
Loans, net	3,077,030	2,902,438
Federal Home Loan Bank stock	17,927	17,927
Federal Reserve Bank stock	4,887	4,887
Accrued interest receivable	12,920	11,922
Mortgage servicing rights	3,283	3,433
Financial liabilities [Abstract]
Deposits	3,200,366	3,081,308
Repurchase agreements	260,007	251,065
Federal funds purchased	8,196	4,816
Advances from Federal Home Loan Bank	50,869	944
Long-term debt	59,341	61,341
Accrued interest payable	2,771	1,200
Unrecognized financial instruments [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	0	0
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets [Abstract]
Cash and cash equivalents	166,416	144,716
Certificates of deposits in other banks	0	0
Available-for-sale securities	89,613	69,292
Securities held-to-maturity	0	0
Loans held for sale	1,651	1,260
Loans, net	0	0
Federal Home Loan Bank stock	0	0
Federal Reserve Bank stock	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	0	0
Financial liabilities [Abstract]
Deposits	786,856	767,918
Repurchase agreements	0	0
Federal funds purchased	0	0
Advances from Federal Home Loan Bank	0	0
Long-term debt	0	0
Accrued interest payable	0	0
Unrecognized financial instruments [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	0	0
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Certificates of deposits in other banks	11,244	982
Available-for-sale securities	513,420	536,102
Securities held-to-maturity	858	867
Loans held for sale	0	0
Loans, net	0	0
Federal Home Loan Bank stock	17,927	17,927
Federal Reserve Bank stock	4,887	4,887
Accrued interest receivable	12,920	11,922
Mortgage servicing rights	0	0
Financial liabilities [Abstract]
Deposits	2,410,741	2,321,690
Repurchase agreements	0	0
Federal funds purchased	8,196	4,816
Advances from Federal Home Loan Bank	50,870	1,009
Long-term debt	0	0
Accrued interest payable	2,771	1,200
Unrecognized financial instruments [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	0	0
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Certificates of deposits in other banks	0	0
Available-for-sale securities	0	0
Securities held-to-maturity	0	0
Loans held for sale	0	0
Loans, net	3,057,809	2,882,348
Federal Home Loan Bank stock	0	0
Federal Reserve Bank stock	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	3,283	3,433
Financial liabilities [Abstract]
Deposits	0	0
Repurchase agreements	260,044	250,820
Federal funds purchased	0	0
Advances from Federal Home Loan Bank	0	0
Long-term debt	49,073	49,073
Accrued interest payable	0	0
Unrecognized financial instruments [Abstract]
Letters of credit	0	0
Commitments to extend credit	0	0
Forward sale commitments	$ 0	$ 0

Earnings Per Share (Details)

Earnings Per 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
Numerator [Abstract]
Net income	$ 13,763	$ 12,312	$ 36,581	$ 35,480
Basic earnings per share [Abstract]
Weighted average shares (in shares)	17,633,000	17,554,000	17,625,000	17,532,000
Diluted earnings per share [Abstract]
Effect of dilutive stock options and restricted stock grants (in shares)	20,000	15,000	20,000	16,000
Adjusted weighted average shares (in shares)	17,653,000	17,569,000	17,645,000	17,548,000
Earnings per share [Abstract]
Basic earnings per share (in dollars per share)	$ 0.78	$ 0.70	$ 2.08	$ 2.02
Diluted earnings per share (in dollars per share)	$ 0.78	$ 0.70	$ 2.07	$ 2.02
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options excluded from diluted calculations (in shares)	0	0	0	15,730
Weighted average price for anti dilutive securities (in dollars per share)		$ 35.409		$ 35.409

Accumulated Other Comprehensi46

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains	$ 48	$ 458	$ 58	$ 522
Tax expense	5,811	5,223	15,010	14,106
Net income	13,763	12,312	36,581	35,480
Unrealized Gains (Losses) on AFS Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains	48	458	58	522
Tax expense	17	160	20	183
Net income	$ 31	$ 298	$ 38	$ 339

Commitments and Contingencies (

Commitments and Contingencies (Details)	9 Months Ended
	Sep. 30, 2017Product
Commitments and Contingencies [Abstract]
Number of deposit add-on products for which certain customer reimbursements are to be made	2