Community Trust Bancorp (CTBI) 10-K 15 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Feb. 28, 2017	Jun. 30, 2016
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 Public Float			$ 578
Entity Common Stock, Shares Outstanding		17,660,868
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Cash and due from banks	$ 48,603	$ 51,974
Interest bearing deposits	95,586	134,846
Federal funds sold	527	791
Cash and cash equivalents	144,716	187,611
Certificates of deposit in other banks	980	3,832
Securities available-for-sale at fair value (amortized cost of $608,939 and $593,381, respectively)	605,394	594,936
Securities held-to-maturity at amortized cost (fair value of $867 and $1,651, respectively)	866	1,661
Loans held for sale	1,244	1,172
Loans	2,938,371	2,873,961
Allowance for loan and lease losses	(35,933)	(36,094)
Net loans	2,902,438	2,837,867
Premises and equipment, net	47,940	48,188
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 $8,483 and $8,324, respectively)	133	291
Bank owned life insurance	63,881	62,335
Mortgage servicing rights	3,433	3,236
Other real estate owned	35,856	40,674
Other assets	36,984	33,827
Total assets	3,932,169	3,903,934
Deposits:
Noninterest bearing	767,918	749,975
Interest bearing	2,313,390	2,230,807
Total deposits	3,081,308	2,980,782
Repurchase agreements	251,065	251,225
Federal funds purchased	4,816	3,596
Advances from Federal Home Loan Bank	944	101,056
Long-term debt	61,341	61,341
Deferred taxes	7,836	8,920
Other liabilities	24,244	21,431
Total liabilities	3,431,554	3,428,351
Commitments and contingencies (notes 18 and 20)
Shareholders' equity:
Preferred stock, 300,000 shares authorized and unissued	0	0
Common stock, $5 par value, shares authorized 25,000,000; shares outstanding 2016 - 17,628,695; 2015 - 17,536,914	88,144	87,685
Capital surplus	219,697	217,032
Retained earnings	195,078	169,855
Accumulated other comprehensive income (loss), net of tax	(2,304)	1,011
Total shareholders' equity	500,615	475,583
Total liabilities and shareholders' equity	$ 3,932,169	$ 3,903,934

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Securities available-for-sale at amortized cost	$ 608,939	$ 593,381
Securities held-to-maturity at fair value	867	1,651
Core deposit intangible, accumulated amortization	$ 8,483	$ 8,324
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)	17,628,695	17,536,914

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Interest and fees on loans, including loans held for sale	$ 133,965	$ 130,829	$ 128,457
Interest and dividends on securities:
Taxable	8,265	9,153	11,314
Tax exempt	2,718	2,705	2,576
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	1,011	1,010	1,136
Other, including interest on federal funds sold	617	323	384
Total interest income	146,576	144,020	143,867
Interest expense:
Interest on deposits	10,921	9,616	9,798
Interest on repurchase agreements	1,155	938	841
Interest on advances from Federal Home Loan Bank	62	49	27
Interest on long-term debt	1,417	1,170	1,131
Total interest expense	13,555	11,773	11,797
Net interest income	133,021	132,247	132,070
Provision for loan losses	7,872	8,650	8,755
Net interest income after provision for loan losses	125,149	123,597	123,315
Noninterest income:
Service charges on deposit accounts	24,966	24,282	23,892
Gains on sales of loans, net	1,831	1,978	1,468
Trust and wealth management income	9,585	9,286	9,011
Loan related fees	4,107	3,821	3,531
Bank owned life insurance	2,199	2,158	1,996
Brokerage revenue	1,314	1,426	2,454
Securities gains (losses)	522	(106)	(211)
Other noninterest income	3,917	3,964	2,940
Total noninterest income	48,441	46,809	45,081
Noninterest expense:
Officer salaries and employee benefits	12,198	11,652	11,076
Other salaries and employee benefits	44,877	42,911	43,417
Occupancy, net	7,999	7,826	8,017
Equipment	2,950	3,049	3,414
Data processing	6,497	6,743	7,877
Bank franchise tax	5,671	5,174	4,857
Legal fees	1,906	2,236	2,444
Professional fees	1,890	1,884	1,832
Advertising and marketing	2,614	2,428	2,421
FDIC insurance	1,789	2,382	2,400
Other real estate owned provision and expense	2,879	3,533	3,897
Repossession expense	1,156	1,265	1,508
Amortization of limited partnership investments	2,623	2,580	859
Other noninterest expense	12,077	11,780	11,980
Total noninterest expense	107,126	105,443	105,999
Income before income taxes	66,464	64,963	62,397
Income taxes	19,118	18,531	19,146
Net income	47,346	46,432	43,251
Unrealized holding gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(4,578)	(342)	13,928
Less: Reclassification adjustments for realized gains (losses) included in net income	522	(106)	(211)
Tax expense (benefit)	(1,785)	(83)	4,949
Other comprehensive income (loss), net of tax	(3,315)	(153)	9,190
Comprehensive income	$ 44,031	$ 46,279	$ 52,441
Basic earnings per share (in dollars per share)	$ 2.70	$ 2.66	$ 2.50
Diluted earnings per share (in dollars per share)	$ 2.70	$ 2.66	$ 2.49
Weighted average shares outstanding-basic (in shares)	17,548	17,431	17,326
Weighted average shares outstanding-diluted (in shares)	17,566	17,483	17,397
Dividends declared per share (in dollars per share)	$ 1.260	$ 1.220	$ 1.181

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net of Tax [Member]	Total
Balance at Dec. 31, 2013	$ 79,107	$ 167,122	$ 174,289	$ (8,026)	$ 412,492
Balance (in shares) at Dec. 31, 2013	17,403,441
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			43,251		43,251
Other comprehensive income (loss), net of tax				9,190	9,190
Cash dividends declared			(20,539)		(20,539)
Issuance of 10% stock dividend	$ 7,910	44,394	(52,304)		0
Issuance of common stock	$ 346	1,646			1,992
Issuance of common stock (in shares)	69,138
Vesting of restricted stock	$ (45)	45			0
Vesting of restricted stock (in shares)	(8,945)
Issuance of restricted stock	$ 23	(23)			0
Issuance of restricted stock (in shares)	4,576
Forfeiture of restricted stock	$ (9)	9			0
Forfeiture of restricted stock (in shares)	(1,835)
Stock-based compensation and related excess tax benefits		1,491			1,491
Balance at Dec. 31, 2014	$ 87,332	214,684	144,697	1,164	447,877
Balance (in shares) at Dec. 31, 2014	17,466,375
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			46,432		46,432
Other comprehensive income (loss), net of tax				(153)	(153)
Cash dividends declared			(21,274)		(21,274)
Issuance of common stock	$ 564	1,518			2,082
Issuance of common stock (in shares)	112,837
Repurchase of common stock	$ (29)	(160)			(189)
Repurchase of common stock (in shares)	(5,724)
Vesting of restricted stock	$ (232)	232			0
Vesting of restricted stock (in shares)	(46,482)
Issuance of restricted stock	$ 53	(53)			0
Issuance of restricted stock (in shares)	10,582
Forfeiture of restricted stock	$ (3)	3			0
Forfeiture of restricted stock (in shares)	(674)
Stock-based compensation and related excess tax benefits		808			808
Balance at Dec. 31, 2015	$ 87,685	217,032	169,855	1,011	$ 475,583
Balance (in shares) at Dec. 31, 2015	17,536,914				17,536,914
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			47,346		$ 47,346
Other comprehensive income (loss), net of tax				(3,315)	(3,315)
Cash dividends declared			(22,123)		(22,123)
Issuance of common stock	$ 693	2,292			2,985
Issuance of common stock (in shares)	138,605
Repurchase of common stock	$ (57)	(325)			(382)
Repurchase of common stock (in shares)	(11,574)
Vesting of restricted stock	$ (265)	265			0
Vesting of restricted stock (in shares)	(52,963)
Issuance of restricted stock	$ 90	(90)			0
Issuance of restricted stock (in shares)	18,069
Forfeiture of restricted stock	$ (2)	2			0
Forfeiture of restricted stock (in shares)	(356)
Stock-based compensation and related excess tax benefits		521			521
Balance at Dec. 31, 2016	$ 88,144	$ 219,697	$ 195,078	$ (2,304)	$ 500,615
Balance (in shares) at Dec. 31, 2016	17,628,695				17,628,695

Consolidated Statements of Cha6

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2014USD ($)$ / shares
Increase (Decrease) in Stockholders' Equity [Roll forward]
Other comprehensive income (loss), tax | $	$ 4,949
Cash dividends declared (in dollars per share) | $ / shares	$ 1.181
Stock dividend rate	10.00%

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 47,346	$ 46,432	$ 43,251
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,904	3,932	4,314
Deferred taxes	701	115	(1,048)
Stock-based compensation	458	783	852
Excess tax benefits of stock-based compensation	100	104	760
Provision for loan losses	7,872	8,650	8,755
Write-downs of other real estate owned and other repossessed assets	1,214	1,656	1,730
Gains on sale of mortgage loans held for sale	(1,831)	(1,978)	(1,468)
Securities (gains) losses	(522)	106	211
Gains on sale of assets, net	46	(321)	(73)
Proceeds from sale of mortgage loans held for sale	81,441	80,571	51,181
Funding of mortgage loans held for sale	(79,682)	(77,501)	(51,149)
Amortization of securities premiums and discounts, net	2,452	3,098	2,661
Change in cash surrender value of bank owned life insurance	(1,546)	(1,638)	(1,506)
Mortgage servicing rights:
Fair value adjustments	324	289	830
New servicing assets created	(521)	(557)	(374)
Changes in:
Other assets	(3,205)	(6,274)	(60)
Other liabilities	2,874	(2,488)	(1,339)
Net cash provided by operating activities	61,425	54,979	57,528
Certificates of deposit in other banks:
Purchase of certificates of deposit	0	0	(245)
Maturity of certificates of deposit	2,852	4,365	1,616
Securities available-for-sale (AFS):
Purchase of AFS securities	(176,236)	(81,456)	(217,949)
Proceeds from sales of AFS securities	54,446	44,198	135,411
Proceeds from prepayments, calls, and maturities of AFS securities	104,302	79,068	63,023
Securities held-to-maturity (HTM):
Proceeds from prepayments and maturities of HTM securities	795	1	0
Change in loans, net	(74,379)	(161,702)	(132,906)
Purchase of premises and equipment	(3,498)	(2,246)	(2,081)
Proceeds from sale of premises and equipment	10	239	82
Redemption of stock by FHLB	0	0	7,746
Additional investment in Federal Reserve Bank stock	0	(18)	(1)
Cancellation of Federal Reserve Bank stock	0	0	18
Proceeds from sale of other real estate owned and repossessed assets	5,601	9,287	6,714
Additional investment in other real estate owned and repossessed assets	0	(85)	0
Additional investment in bank owned life insurance	0	0	(5,504)
Net cash used in investing activities	(86,107)	(108,349)	(144,076)
Cash flows from financing activities:
Change in deposits, net	100,526	106,525	19,183
Change in repurchase agreements and federal funds purchased, net	1,060	8,594	25,695
Advances from Federal Home Loan Bank	50,000	170,000	60,000
Payments on advances from Federal Home Loan Bank	(150,112)	(130,114)	(116)
Issuance of common stock	2,985	2,082	1,992
Repurchase of common stock	(382)	(189)	0
Excess tax benefits of stock-based compensation	(100)	(104)	(760)
Dividends paid	(22,190)	(21,330)	(20,570)
Net cash provided by (used in) financing activities	(18,213)	135,464	85,424
Net increase (decrease) in cash and cash equivalents	(42,895)	82,094	(1,124)
Cash and cash equivalents at beginning of year	187,611	105,517	106,641
Cash and cash equivalents at end of year	144,716	187,611	105,517
Supplemental disclosures:
Income taxes paid	19,244	20,527	15,818
Interest paid	13,426	11,609	11,922
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	3,964	4,343	6,168
Common stock dividends accrued, paid in subsequent quarter	209	239	216
Real estate acquired in settlement of loans	$ 5,900	$ 18,557	$ 12,199

Accounting Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Accounting Policies	1. Accounting Policies Basis of Presentation Nature of Operations Use of Estimates The accompanying financial statements have been prepared using values and information currently available to CTBI. Given the volatility of current economic conditions, the values of assets and liabilities recorded in the financial statements could change rapidly, resulting in material future adjustments in asset values, the allowance for loan and lease losses, and capital. Cash and Cash Equivalents Certificates of Deposit in Other Banks 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, a charge off is taken, if necessary, in order that the remaining balance reflects the fair value estimated less costs to sell of the collateral then transferred to other real estate owned or other repossessed assets. 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. Loans Held for Sale Premises and Equipment Depreciation and amortization are computed primarily using the straight-line method. Estimated useful lives range up to 40 years for buildings, 2 to 10 years for furniture, fixtures, and equipment, and up to the lease term for leasehold improvements. Capitalized leased assets are amortized on a straight-line basis over the lives of the respective leases. Federal Home Loan Bank and Federal Reserve Stock CTB is also a member of its regional Federal Reserve Bank. Federal Reserve Bank stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on the ultimate recovery par value. Both cash and stock dividends are reported as income. Other Real Estate Owned All revenues and expenses related to the carrying of other real estate owned are recognized through the income statement. Goodwill and Core Deposit Intangible Intangibles-Goodwill and Other The balance of goodwill, at $65.5 million, has not changed since January 1, 2014. The activity to core deposit intangible for the years ended December 31, 2016, 2015, and 2014 is shown below. Core Deposit Intangible: (in thousands) 2016 2015 2014 Beginning balance, January 1 $ 291 $ 477 $ 690 Amortization (158 ) (186 ) (213 ) Ending balance, December 31 $ 133 $ 291 $ 477 Amortization of core deposit intangible is estimated at approximately $0.1 million for year one, at which time core deposit intangible will be fully amortized. Transfers of Financial Assets Income Taxes Earnings Per Share (“EPS”) Diluted EPS adjusts the number of weighted average shares of common stock outstanding by the dilutive effect of stock options, including restricted shares, as prescribed in ASC 718, Share-Based Payment Segments Bank Owned Life Insurance Mortgage Servicing Rights Servicing Assets and Liabilities Fair Value Measurements Share-Based Compensation Share-Based Payment Comprehensive Income Transfers between Fair Value Hierarchy Levels – Reclassifications – New Accounting Standards Ø Elimination of Extraordinary Reporting Accounting Standards Update (“ASU”) Income Statement – Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The amendments in this ASU were effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Ø Intangibles – Goodwill and Other – Internal-Use Software – In April 2015, the FASB issued ASU No. 2015-05, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40) . The amendments in this update provided guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance did not change GAAP for a customer’s accounting for service contracts. In addition, the guidance in this update supersedes paragraph 350-40-25-16. Consequently, all software licenses within the scope of Subtopic 350-40 are accounted for consistent with other licenses of intangible assets. For public business entities, the amendments were effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2015. Ø Income Taxes Income Taxes (Topic 740) 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 will 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 are 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 Accounting Changes and Error Correction and Investments – Equity Method and Joint Ventures Accounting Changes and Error Corrections (Topic 250) and Investments -Equity Method and Joint Ventures (Topic 323): Amendments to SEC Paragraphs Pursuant to Staff Announcements at the September 22, 2016 and November 17, 2016 EITF Meetings Revenue from Contracts with Customers (Topic 606) Leases (Topic 842) Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

Cash and Due from Banks and Int

Cash and Due from Banks and Interest Bearing Deposits	12 Months Ended
	Dec. 31, 2016
Cash and Due from Banks and Interest Bearing Deposits [Abstract]
Cash and Due from Banks and Interest Bearing Deposits	2. Cash and Due from Banks and Interest Bearing Deposits Included in cash and due from banks and interest bearing deposits are amounts required to be held at the Federal Reserve or maintained in vault cash in accordance with regulatory reserve requirements. The balance requirements were $74.1 million and $69.4 million at December 31, 2016 and 2015, respectively. At December 31, 2016, CTBI had cash accounts which exceeded federally insured limits, and therefore are not subject to FDIC insurance, with $93.4 million in deposits with the Federal Reserve, $23.3 million in deposits with Fifth Third Bank, and $2.2 million in deposits with the Federal Home Loan Bank.

Securities

Securities	12 Months Ended
	Dec. 31, 2016
Securities [Abstract]
Securities	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 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 U.S. Treasury and government agencies $ 0 $ 0 $ 0 $ 0 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 December 31, 2015 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 $ 240,434 $ 311 $ (1,351 ) $ 239,394 State and political subdivisions 125,665 3,707 (157 ) 129,215 U.S. government sponsored agency mortgage-backed securities 202,282 1,564 (2,270 ) 201,576 Total debt securities 568,381 5,582 (3,778 ) 570,185 CRA investment funds 25,000 132 (381 ) 24,751 Total available-for-sale securities $ 593,381 $ 5,714 $ (4,159 ) $ 594,936 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and government agencies $ 480 $ 0 $ (12 ) $ 468 State and political subdivisions 1,181 2 0 1,183 Total held-to-maturity securities $ 1,661 $ 2 $ (12 ) $ 1,651 The amortized cost and fair value of securities at December 31, 2016 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 $ 104,396 $ 104,383 $ 0 $ 0 Due after one through five years 101,799 102,135 866 867 Due after five through ten years 60,047 60,358 0 0 Due after ten years 90,123 89,104 0 0 U.S. government sponsored agency mortgage-backed securities 227,574 225,056 0 0 Total debt securities 583,939 581,036 866 867 CRA investment funds 25,000 24,358 0 0 Total securities $ 608,939 $ 605,394 $ 866 $ 867 In 2016, there was a net gain of $522 thousand realized on sales and calls of AFS securities, consisting of a pre-tax gain of $529 thousand and a pre-tax loss of $7 thousand. There was a net loss of $106 thousand realized in 2015 and a net loss of $211 thousand realized in 2014. The amortized cost of securities pledged as collateral, to secure public deposits and for other purposes, was $221.2 million at December 31, 2016 and $228.2 million at December 31, 2015. The amortized cost of securities sold under agreements to repurchase amounted to $303.5 million at December 31, 2016 and $285.5 million at December 31, 2015. CTBI evaluates its investment portfolio on a quarterly basis for impairment. The analysis performed as of December 31, 2016 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 December 31, 2016 was 65.6% compared to 61.1% as of December 31, 2015. 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. 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 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Losses Fair Value 12 Months or More U.S. Treasury and government agencies $ 0 $ 0 $ 0 Total temporarily impaired HTM securities $ 0 $ 0 $ 0 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 December 31, 2016, 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 December 31, 2016, 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 December 31, 2016, because (i) the decline in 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 ($24.4 million of the total fair value and $718 thousand of the total unrealized losses in common stock investments). The severity of the impairment (fair value is approximately 2.9% less than cost) and the duration of the impairment correlates with the decline in long-term interest rates in 2016. 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 December 31, 2016. The analysis performed as of December 31, 2015 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, 2015 that are not deemed to be other-than-temporarily impaired. Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Losses Fair Value Less Than 12 Months U.S. Treasury and government agencies $ 142,147 $ (487 ) $ 141,660 State and political subdivisions 11,190 (106 ) 11,084 U.S. government sponsored agency mortgage-backed securities 92,009 (899 ) 91,110 Total debt securities 245,346 (1,492 ) 243,854 CRA investment funds 10,000 (183 ) 9,817 Total <12 months temporarily impaired AFS securities 255,346 (1,675 ) 253,671 12 Months or More U.S. Treasury and government agencies 54,773 (864 ) 53,909 State and political subdivisions 3,187 (51 ) 3,136 U.S. government sponsored agency mortgage-backed securities 49,908 (1,371 ) 48,537 Total debt securities 107,868 (2,286 ) 105,582 CRA investment funds 5,000 (198 ) 4,802 Total ≥12 months temporarily impaired AFS securities 112,868 (2,484 ) 110,384 Total U.S. Treasury and government agencies 196,920 (1,351 ) 195,569 State and political subdivisions 14,377 (157 ) 14,220 U.S. government sponsored agency mortgage-backed securities 141,917 (2,270 ) 139,647 Total debt securities 353,214 (3,778 ) 349,436 CRA investment funds 15,000 (381 ) 14,619 Total temporarily impaired AFS securities $ 368,214 $ (4,159 ) $ 364,055 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Losses Fair Value 12 Months or More U.S. Treasury and government agencies $ 480 $ (12 ) $ 468 Total temporarily impaired HTM securities $ 480 $ (12 ) $ 468

Loans

Loans	12 Months Ended
	Dec. 31, 2016
Loans [Abstract]
Loans	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) December 31 2016 December 31 2015 Commercial construction $ 66,998 $ 78,020 Commercial secured by real estate 1,085,428 1,052,919 Equipment lease financing 5,512 8,514 Commercial other 350,159 358,898 Real estate construction 57,966 61,750 Real estate mortgage 702,969 707,874 Home equity 91,511 89,450 Consumer direct 133,093 126,406 Consumer indirect 444,735 390,130 Total loans $ 2,938,371 $ 2,873,961 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 fixed 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) December 31 2016 December 31 2015 Commercial: Commercial construction $ 1,912 $ 3,402 Commercial secured by real estate 6,326 5,928 Commercial other 1,559 1,485 Residential: Real estate construction 11 249 Real estate mortgage 6,260 5,206 Home equity 555 183 Consumer: Consumer direct 0 110 Total nonaccrual loans $ 16,623 $ 16,563 The following tables present CTBI’s loan portfolio aging analysis, segregated by class, as of December 31, 2016 and 2015: 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 December 31, 2015 (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 $ 36 $ 6 $ 3,431 $ 3,473 $ 74,547 $ 78,020 $ 30 Commercial secured by real estate 2,947 622 7,923 11,492 1,041,427 1,052,919 3,757 Equipment lease financing 199 0 0 199 8,315 8,514 0 Commercial other 762 121 1,476 2,359 356,539 358,898 310 Residential: Real estate construction 443 62 291 796 60,954 61,750 55 Real estate mortgage 1,128 3,888 10,907 15,923 691,951 707,874 6,925 Home equity 527 148 580 1,255 88,195 89,450 448 Consumer: Consumer direct 835 479 126 1,440 124,966 126,406 126 Consumer indirect 2,133 814 395 3,342 386,788 390,130 395 Total $ 9,010 $ 6,140 $ 25,129 $ 40,279 $ 2,833,682 $ 2,873,961 $ 12,046 *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 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 December 31, 2016 and 2015: (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Leases Commercial Other Total 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 December 31, 2015 Pass $ 62,978 $ 937,196 $ 8,514 $ 312,100 $ 1,320,788 Watch 4,931 71,830 0 37,670 114,431 OAEM 2,206 13,765 0 963 16,934 Substandard 6,780 29,232 0 7,072 43,084 Doubtful 1,125 896 0 1,093 3,114 Total $ 78,020 $ 1,052,919 $ 8,514 $ 358,898 $ 1,498,351 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 December 31, 2016 and 2015: (in thousands) Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total 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 December 31, 2015 Performing $ 61,446 $ 695,743 $ 88,819 $ 126,170 $ 389,735 $ 1,361,913 Nonperforming (1) 304 12,131 631 236 395 13,697 Total $ 61,750 $ 707,874 $ 89,450 $ 126,406 $ 390,130 $ 1,375,610 (1) A loan is considered nonperforming if it is 90 days or more past due or on nonaccrual. The total of consumer mortgage loans secured by real estate properties for which formal foreclosure proceedings are in process totaled $3.5 million at December 31, 2016 compared to $4.4 million at December 31, 2015. 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 years ended December 31, 2016, 2015, and 2014: 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 December 31, 2015 (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 $ 2,861 $ 2,862 $ 0 $ 4,574 $ 200 Commercial secured by real estate 30,761 32,166 0 30,605 1,378 Commercial other 7,500 9,148 0 8,802 316 Real estate mortgage 1,744 1,744 0 1,179 50 Loans with a specific valuation allowance: Commercial construction 3,402 3,402 831 3,631 0 Commercial secured by real estate 2,660 2,768 1,227 2,349 7 Commercial other 960 1,153 403 836 1 Totals: Commercial construction 6,263 6,264 831 8,205 200 Commercial secured by real estate 33,421 34,934 1,227 32,954 1,385 Commercial other 8,460 10,301 403 9,638 317 Real estate mortgage 1,744 1,744 0 1,179 50 Total $ 49,888 $ 53,243 $ 2,461 $ 51,976 $ 1,952 December 31, 2014 (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 $ 5,653 $ 5,654 $ 0 $ 5,415 $ 205 Commercial secured by real estate 31,639 33,268 0 34,650 1,180 Commercial other 13,069 14,597 0 15,663 783 Real estate mortgage 1,277 1,277 0 1,507 53 Loans with a specific valuation allowance: Commercial construction 3,974 3,974 734 4,216 0 Commercial secured by real estate 2,718 2,876 827 4,376 11 Commercial other 738 862 181 531 1 Totals: Commercial construction 9,627 9,628 734 9,631 205 Commercial secured by real estate 34,357 36,144 827 39,026 1,191 Commercial other 13,807 15,459 181 16,194 784 Real estate mortgage 1,277 1,277 0 1,507 53 Total $ 59,068 $ 62,508 $ 1,742 $ 66,358 $ 2,233 *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 with 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 2016, 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 Year Ended December 31, 2015 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 3 $ 428 $ 0 $ 0 $ 428 Commercial secured by real estate 21 4,244 0 1,760 6,004 Commercial other 7 3,847 0 0 3,847 Residential: Real estate mortgage 3 0 0 848 848 Total troubled debt restructurings 34 $ 8,519 $ 0 $ 2,608 $ 11,127 No charge-offs have resulted from modifications for any of the presented periods. We have commitments to extend additional credit in the amount of $0.1 million on loans that are considered troubled debt restructurings. 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 and lease 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 past twelve months which have subsequently defaulted. CTBI considers a loan in default when it is 90 days or more past due or transferred to nonaccrual. (in thousands) Year Ended December 31, 2016 Number of Loans Recorded Balance Commercial: Commercial secured by real estate 1 $ 67 Commercial other 1 12 Total defaulted restructured loans 2 $ 79 (in thousands) Year Ended December 31, 2015 Number of Loans Recorded Balance Commercial: Commercial secured by real estate 3 $ 114 Total defaulted restructured loans 3 $ 114

Mortgage Banking and Servicing

Mortgage Banking and Servicing Rights	12 Months Ended
	Dec. 31, 2016
Mortgage Banking and Servicing Rights [Abstract]
Mortgage Banking and Servicing Rights	5. Mortgage Banking and Servicing Rights Mortgage banking activities primarily include residential mortgage originations and servicing. As discussed in note 1 above, mortgage servicing rights (“MSRs”) are carried at fair market value. The fair value is determined quarterly based on an independent third-party valuation using a discounted cash flow analysis and calculated using a computer pricing model. The system used in this evaluation, Compass Point, attempts to quantify loan level idiosyncratic risk by calculating a risk derived value. As a result, each loan’s unique characteristics determine the valuation assumptions ascribed to that loan. Additionally, the computer valuation is based on key economic assumptions including the 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, as applicable. Along with the gains received from the sale of loans, fees are received for servicing loans. These fees include late fees, which are recorded in interest income, and ancillary fees and monthly servicing fees, which are recorded in noninterest income. Costs of servicing loans are charged to expense as incurred. Changes in fair market value of the MSRs are reported as an increase or decrease to mortgage banking income. The following table presents the components of mortgage banking income: (in thousands) Year Ended December 31 2016 2015 2014 Net gain on sale of loans held for sale $ 1,831 $ 1,978 $ 1,468 Net loan servicing income (expense) Servicing fees 1,239 1,197 1,129 Late fees 78 88 112 Ancillary fees 322 212 149 Fair value adjustments (324 ) (289 ) (830 ) Net loan servicing income 1,315 1,208 560 Mortgage banking income $ 3,146 $ 3,186 $ 2,028 Mortgage loans serviced for others are not included in the accompanying balance sheets. Loans serviced for the benefit of others (primarily FHLMC) totaled $466 million, $458 million, and $441 million at December 31, 2016, 2015 and 2014, respectively. Servicing loans for others generally consists of collecting mortgage payments, maintaining escrow accounts, disbursing payments to investors, and processing foreclosures. Custodial escrow balances maintained in connection with the foregoing loan servicing, and included in demand deposits, were approximately $1.0 million, $1.0 million, and $0.9 million at December 31, 2016, 2015, and 2014, respectively. Activity for capitalized mortgage servicing rights using the fair value method is as follows: (in thousands) 2016 2015 2014 Fair value of MSRs, beginning of period $ 3,236 $ 2,968 $ 3,424 New servicing assets created 521 557 374 Change in fair value during the period due to: Time decay (1) (175 ) (168 ) (162 ) Payoffs (2) (313 ) (247 ) (202 ) Changes in valuation inputs or assumptions (3) 164 126 (466 ) Fair value of MSRs, end of period $ 3,433 $ 3,236 $ 2,968 (1) Represents decrease in value due to regularly scheduled loan principal payments and partial loan paydowns. (2) Represents decrease in value due to loans that paid off during the period. (3) Represents change in value resulting from market-driven changes in interest rates. The fair values of capitalized mortgage servicing rights were $3.4 million, $3.2 million, and $3.0 million at December 31, 2016, 2015, and 2014, respectively. Fair values for the years ended December 31, 2016, 2015, and 2014 were determined by third-party valuations with a resulting 10.1% average discount rate over the last three years, respectively, and weighted average default rates of 3.02%, 2.64%, and 3.61%, respectively. Prepayment speeds generated using the Andrew Davidson Prepayment Model averaged 9.5%, 10.0%, and 11.3% at December 31, 2016, 2015, and 2014, respectively. MSR values are very sensitive to movement in interest rates as expected future net servicing income depends on the projected balance of the underlying loans, which can be greatly impacted by the level of prepayments. CTBI does not currently hedge against changes in the fair value of its MSR portfolio.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	6. Related Party Transactions In the ordinary course of business, CTB has made extensions of credit and had transactions with certain directors and executive officers of CTBI or our subsidiaries, including their associates (as defined by the Securities and Exchange Commission). We believe such extensions of credit and transactions were made on substantially the same terms, including interest rate and collateral, as those prevailing at the same time for comparable transactions with other persons. Activity for related party extensions of credit during 2016 and 2015 is as follows: (in thousands) 2016 2015 Related party extensions of credit, beginning of period $ 29,224 $ 37,473 New loans and advances on lines of credit 2,456 867 Repayments (4,599 ) (9,116 ) Related party extensions of credit, end of period $ 27,081 $ 29,224 The aggregate balances of related party deposits at December 31, 2016 and 2015 were $15.5 million and $12.5 million, respectively. A director of CTBI is a shareholder in a law firm that provided services to CTBI and its subsidiaries during the years 2016, 2015, and 2014. Approximately $1.0 million in legal fees and $0.1 million in expenses paid on behalf of CTBI, $1.1 million total, were paid to this law firm during 2016. Approximately $1.2 million in legal fees and $0.1 million in expenses, $1.3 million total, were paid during 2015, and approximately $1.0 million in legal fees and $0.1 million in expenses, $1.1 million in total, were paid during 2014.

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	12 Months Ended
	Dec. 31, 2016
Allowance for Loan and Lease Losses [Abstract]
Allowance for Loan and Lease Losses	7. 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 December 31, 2016, 2015, and 2014: 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 ALLL Balance, beginning of year $ 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 Balance, end of year $ 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 2015 (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 ALLL Balance, beginning of year $ 2,896 $ 13,618 $ 119 $ 4,263 $ 534 $ 6,094 $ 756 $ 1,574 $ 4,593 $ 34,447 Provision charged to expense (707 ) 2,135 (40 ) 1,338 147 1,888 158 891 2,840 8,650 Losses charged off (3 ) (1,379 ) 0 (1,961 ) (135 ) (1,421 ) (129 ) (1,306 ) (3,536 ) (9,870 ) Recoveries 13 60 0 585 4 117 54 435 1,599 2,867 Balance, end of year $ 2,199 $ 14,434 $ 79 $ 4,225 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 36,094 Ending balance: Individually evaluated for impairment $ 831 $ 1,227 $ 0 $ 403 $ 0 $ 0 $ 0 $ 0 $ 0 $ 2,461 Collectively evaluated for impairment $ 1,368 $ 13,207 $ 79 $ 3,822 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 33,633 Loans Ending balance: Individually evaluated for impairment $ 6,263 $ 33,421 $ 0 $ 8,460 $ 0 $ 1,744 $ 0 $ 0 $ 0 $ 49,888 Collectively evaluated for impairment $ 71,757 $ 1,019,498 $ 8,514 $ 350,438 $ 61,750 $ 706,130 $ 89,450 $ 126,406 $ 390,130 $ 2,824,073 2014 (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 ALLL Balance, beginning of year $ 3,396 $ 14,535 $ 121 $ 5,238 $ 397 $ 4,939 $ 601 $ 1,127 $ 3,654 $ 34,008 Provision charged to expense (513 ) 941 (2 ) 1,545 258 2,173 265 1,207 2,881 8,755 Losses charged off (15 ) (2,163 ) 0 (3,141 ) (123 ) (1,058 ) (115 ) (1,326 ) (3,495 ) (11,436 ) Recoveries 28 305 0 621 2 40 5 566 1,553 3,120 Balance, end of year $ 2,896 $ 13,618 $ 119 $ 4,263 $ 534 $ 6,094 $ 756 $ 1,574 $ 4,593 $ 34,447 Ending balance: Individually evaluated for impairment $ 734 $ 827 $ 0 $ 181 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,742 Collectively evaluated for impairment $ 2,162 $ 12,791 $ 119 $ 4,082 $ 534 $ 6,094 $ 756 $ 1,574 $ 4,593 $ 32,705 Loans Ending balance: Individually evaluated for impairment $ 9,627 $ 34,357 $ 0 $ 13,807 $ 0 $ 1,277 $ 0 $ 0 $ 0 $ 59,068 Collectively evaluated for impairment $ 112,315 $ 914,269 $ 10,344 $ 338,241 $ 62,412 $ 711,188 $ 88,335 $ 122,136 $ 315,516 $ 2,674,756

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2016
Premises and Equipment [Abstract]
Premises and Equipment	8. Premises and Equipment Premises and equipment are summarized as follows: (in thousands) December 31 2016 2015 Land and buildings $ 78,086 $ 76,709 Leasehold improvements 4,886 4,793 Furniture, fixtures, and equipment 36,831 35,382 Construction in progress 769 196 Total premises and equipment 120,572 117,080 Less accumulated depreciation and amortization (72,632 ) (68,892 ) Premises and equipment, net $ 47,940 $ 48,188 Depreciation and amortization of premises and equipment for 2016, 2015, and 2014 was $3.7 million, $3.7 million, and $4.1 million, respectively.

Other Real Estate Owned

Other Real Estate Owned	12 Months Ended
	Dec. 31, 2016
Other Real Estate Owned [Abstract]
Other Real Estate Owned	9. Other Real Estate Owned Activity for other real estate owned was as follows: (in thousands) 2016 2015 Beginning balance of other real estate owned $ 40,674 $ 36,776 New assets acquired 5,900 18,850 Capitalized costs 0 85 Fair value adjustments (1,214 ) (1,656 ) Sale of assets (9,504 ) (13,381 ) Ending balance of other real estate owned $ 35,856 $ 40,674 Carrying costs and fair value adjustments associated with foreclosed properties were $2.9 million, $3.5 million, and $3.9 million for 2016, 2015, and 2014, respectively. See note 1 for a description of our accounting policies relative to foreclosed properties and other real estate owned. The major classifications of foreclosed properties are shown in the following table: (in thousands) December 31 2016 2015 1-4 family $ 6,210 $ 7,493 Agricultural/farmland 93 116 Construction/land development/other 20,778 22,570 Multifamily 270 833 Non-farm/non-residential 8,505 9,662 Total foreclosed properties $ 35,856 $ 40,674

Deposits

Deposits	12 Months Ended
	Dec. 31, 2016
Deposits [Abstract]
Deposits	10. Deposits Major classifications of deposits are categorized as follows: (in thousands) December 31 2016 2015 Noninterest bearing deposits $ 767,918 $ 749,975 NOW accounts 45,872 44,567 Money market deposits 649,917 614,911 Savings 404,558 382,131 Certificates of deposit and other time deposits of $100,000 or more 651,882 606,859 Certificates of deposit and other time deposits less than $100,000 561,161 582,339 Total deposits $ 3,081,308 $ 2,980,782 Certificates of deposit and other time deposits of $250,000 or more at December 31, 2016 and 2015 were $228.6 million and $190.6 million, respectively. Maturities of certificates of deposits and other time deposits are presented below: Maturities by Period at December 31, 2016 (in thousands) Total Within 1 Year 2 Years 3 Years 4 Years 5 Years After 5 Years Certificates of deposit and other time deposits of $100,000 or more $ 651,882 $ 516,384 $ 56,494 $ 23,180 $ 24,074 $ 31,750 $ 0 Certificates of deposit and other time deposits less than $100,000 561,161 471,912 38,109 17,628 13,354 19,830 328 Total maturities $ 1,213,043 $ 988,296 $ 94,603 $ 40,808 $ 37,428 $ 51,580 $ 328

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2016
Borrowings [Abstract]
Borrowings	11. Borrowings Short-term debt is categorized as follows: (in thousands) December 31 2016 2015 Repurchase agreements $ 251,065 $ 251,225 Federal funds purchased 4,816 3,596 Total short-term debt $ 255,881 $ 254,821 All federal funds purchased mature and reprice daily. See note 12 for information regarding the maturities of our repurchase agreements. The average rates paid for federal funds purchased and repurchase agreements on December 31, 2016 were 0.54% and 0.51%, respectively. The maximum balance for repurchase agreements at any month-end during 2016 occurred at October 31, 2016, with a month-end balance of $264.5 million. The average balance of repurchase agreements for the year was $256.6 million. On October 5, 2016, Community Trust Bancorp, Inc. entered into a revolving credit promissory note for a line of credit in the amount of $12 million at a floating interest rate of 2.00% in excess of the one-month LIBOR Rate, with an unused commitment fee of 0.15%. Currently, all $12 million remain available for general corporate purposes. The agreement, which was effective October 5, 2016, replaced the agreement dated November 2, 2015, and will mature on October 31, 2017. Long-term debt is categorized as follows: (in thousands) December 31 2016 2015 Junior subordinated debentures, 2.52%, due 6/1/37 $ 61,341 $ 61,341 On March 31, 2007, CTBI issued $61.3 million in junior subordinated debentures to a newly formed unconsolidated Delaware statutory trust subsidiary which in turn issued $59.5 million of capital securities in a private placement to institutional investors. The debentures, which mature in 30 years but are redeemable at par at CTBI’s option after five years, were issued at a rate of 6.52% until June 1, 2012, and thereafter at a floating rate based on the three-month LIBOR plus 1.59%. The underlying capital securities were issued at the equivalent rates and terms. The proceeds of the debentures were used to fund the redemption on April 2, 2007 of all CTBI’s outstanding 9.0% and 8.25% junior subordinated debentures in the total amount of $61.3 million. On November 29, 2016, the coupon rate was set at 2.52% for the March 1, 2017 distribution date, which was based on the three-month LIBOR rate as of November 29, 2016 of 0.93% plus 1.59%.

Repurchase Agreements

Repurchase Agreements	12 Months Ended
	Dec. 31, 2016
Repurchase Agreements [Abstract]
Repurchase Agreements	12. 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 $302.3 million and $288.1 million at December 31, 2016 and December 31, 2015, 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 December 31, 2016 and December 31, 2015 is presented in the following tables: 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 December 31, 2015 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 $ 19,184 $ 0 $ 10,401 $ 48,695 $ 78,280 State and political subdivisions 58,676 494 1,656 9,159 69,985 U.S. government sponsored agency mortgage-backed securities 27,810 6 12,278 62,866 102,960 Total $ 105,670 $ 500 $ 24,335 $ 120,720 $ 251,225

Advances from Federal Home Loan

Advances from Federal Home Loan Bank	12 Months Ended
	Dec. 31, 2016
Advances from Federal Home Loan Bank [Abstract]
Advances from Federal Home Loan Bank	13. Advances from Federal Home Loan Bank Federal Home Loan Bank advances consisted of the following monthly amortizing and term borrowings at December 31: (in thousands) 2016 2015 Monthly amortizing $ 944 $ 1,056 Term 0 100,000 Total FHLB advances $ 944 $ 101,056 The advances from the FHLB that require monthly principal payments were due for repayment as follows: Principal Payments Due by Period at December 31, 2016 (in thousands) Total Within 1 Year 2 Years 3 Years 4 Years 5 Years After 5 Years Outstanding advances, weighted average interest rate – 1.33% $ 944 $ 106 $ 404 $ 20 $ 20 $ 20 $ 374 At December 31, 2015, CTBI had monthly amortizing FHLB advances totaling $1.1 million at a weighted average interest rate of 1.53%. CTBI utilizes the FHLB cash management advance to facilitate any short-term funding needs. These short-term advances typically have a two-week maturity and require the total payment to be made at maturity. At December 31, 2016, there were no short-term advances. At December 31, 2015, CTBI had a $100.0 million term advance with a fixed interest rate of 0.34% and a maturity date of January 6, 2016. Advances totaling $0.9 million at December 31, 2016 were collateralized by FHLB stock of $17.9 million and a blanket lien on qualifying 1-4 family first mortgage loans. As of December 31, 2016, CTBI had a $522.8 million FHLB borrowing capacity with $0.9 million in advances and $226.1 million in letters of credit used for public fund pledging leaving $295.8 million available for additional advances. The advances had fixed interest rates ranging from 0.00% to 6.03% with a weighted average rate of 1.33%. The advances are subject to restrictions or penalties in the event of prepayment.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Taxes [Abstract]
Income Taxes	14. Income Taxes The components of the provision for income taxes, exclusive of tax effect of unrealized securities gains and losses, are as follows: (in thousands) 2016 2015 2014 Current income tax expense $ 18,417 $ 18,416 $ 20,194 Deferred income tax expense (benefit) 701 115 (1,048 ) Total income tax expense $ 19,118 $ 18,531 $ 19,146 A reconciliation of income tax expense at the statutory rate to our actual income tax expense is shown below: (in thousands) 2016 2015 2014 Computed at the statutory rate $ 23,262 35.00 % $ 22,737 35.00 % $ 21,839 35.00 % Adjustments resulting from: Tax-exempt interest (1,289 ) (1.94 ) (1,275 ) (1.96 ) (1,204 ) (1.93 ) Housing and new markets credits (2,680 ) (4.03 ) (2,692 ) (4.14 ) (1,076 ) (1.72 ) Dividends received deduction (136 ) (0.20 ) (128 ) (0.20 ) (178 ) (0.29 ) Bank owned life insurance (518 ) (0.78 ) (549 ) (0.84 ) (503 ) (0.81 ) ESOP dividend deduction (313 ) (0.47 ) (298 ) (0.46 ) (284 ) (0.46 ) Other, net 792 1.18 736 1.13 552 0.89 Total $ 19,118 28.76 % $ 18,531 28.53 % $ 19,146 30.68 % The components of the net deferred tax liability as of December 31 are as follows: (in thousands) 2016 2015 Deferred tax assets: Allowance for loan and lease losses $ 12,577 $ 12,633 Interest on nonperforming loans 806 806 Accrued expenses 1,883 2,087 Allowance for other real estate owned 1,898 2,185 Unrealized losses on available-for-sale securities 1,241 0 Other 282 665 Total deferred tax assets 18,687 18,376 Deferred tax liabilities: Depreciation and amortization (20,287 ) (20,150 ) FHLB stock dividends (3,460 ) (3,460 ) Loan fee income (536 ) (552 ) Mortgage servicing rights (1,202 ) (1,133 ) Capitalized lease obligations (65 ) (211 ) Unrealized gains on AFS securities 0 (544 ) Limited partnership investments (411 ) (650 ) Other (562 ) (596 ) Total deferred tax liabilities (26,523 ) (27,296 ) Net deferred tax liability $ (7,836 ) $ (8,920 ) CTBI accounts for income taxes in accordance with income tax accounting guidance (ASC 740, Income Taxes Uncertain tax positions are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management’s judgment. With a few exceptions, CTBI is no longer subject to U.S. federal tax examinations by tax authorities for years before 2013, and state and local income tax examinations by tax authorities for years before 2012. For federal tax purposes, CTBI recognizes interest and penalties on income taxes as a component of income tax expense. CTBI files consolidated income tax returns with its subsidiaries.

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2016
Employee Benefits [Abstract]
Employee Benefits	15. Employee Benefits CTBI maintains two separate retirement savings plans, a 401(k) Plan and an Employee Stock Ownership Plan ("ESOP"). The 401(k) Plan is available to all employees (age 21 and over) with one year of service and who work at least 1,000 hours per year. Participants in the plan have the option to contribute from 1% to 20% of their annual compensation. CTBI matches 50% of participant contributions up to 4% of gross pay. CTBI may at its discretion, contribute an additional percentage of covered employees' compensation. CTBI's matching contributions were $ million for the years ended December 31, 2016, 2015, and 2014. The 401(k) Plan owned , 515,062, and 503,082 shares of CTBI's common stock at December 31, 2016, 2015, and 2014, respectively. Substantially all shares owned by the 401(k) were allocated to employee accounts on those dates. The market price of the shares at the date of allocation is essentially the same as the market price at the date of purchase. The ESOP Plan has the same entrance requirements as the 401(k) Plan above. CTBI currently contributes 4% of covered employees' gross compensation to the ESOP. The ESOP uses the contributions to acquire shares of CTBI's common stock. CTBI's contributions to the ESOP were $1.5 million for the years ended December 31, 2016, 2015, and 2014. The ESOP owned , 765,630, and 752,710 shares of CTBI's common stock at December 31, 2016, 2015, and 2014, respectively. Substantially all shares owned by the ESOP were allocated to employee accounts on those dates. The market price of the shares at the date of allocation is essentially the same as the market price at the date of purchase. Stock-Based Compensation: As of December 31, 2016, CTBI maintained one active and two inactive incentive stock ownership plans covering key employees. The 2015 Stock Ownership Incentive Plan (“2015 Plan”) was approved by the Board of Directors and the Shareholders in 2015. The 2006 Stock Ownership Incentive Plan (“2006 Plan”) was approved by the Board of Directors and the Shareholders in 2006. The 2006 Plan was rendered inactive as of April 28, 2015. The 1998 Stock Option Plan (“1998 Plan”) was approved by the Board of Directors and the Shareholders in 1998. The 1998 Plan was rendered inactive as of April 26, 2006. The 2015 Plan has 550,000 shares authorized, 540,131 of which were available at December 31, 2016. Shares issuable pursuant to awards which were granted under the prior plans on or before their respective expiration or termination dates will be issued from the remaining shares reserved for issuance under the prior plans. The shares of common stock reserved for issuance under the prior plans in excess of the number of shares as to which options or other benefits are awarded thereunder, and any shares as to which options or other benefits granted under the prior plans may lapse, expire, terminate or be canceled, will not be reserved and available for issuance or reissuance under the 2015 Plan. In January 2016, 18,069 shares were issued under the terms of the 2015 Plan pursuant to awards granted and earned under the 2006 Plan. Accordingly, this issuance did not reduce the shares available under the 2015 Plan. Additional shares will not be issued under the 2015 Plan pursuant to awards granted under the 2006 Plan. The following table provides detail of the number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance under all of CTBI's equity compensation plans as of December 31, 2016: Plan Category (shares in thousands) Number of Shares to Be Issued Upon Exercise Weighted Average Price Shares Available for Future Issuance Equity compensation plans approved by shareholders: Stock options 71 $ 30.36 540 (a) Restricted stock (c) (b) (a) Performance units (d) (b) (a) Stock appreciation rights (“SARs”) (e) (b) (a) Total 540 (a) Under the 2015 Plan, 550,000 shares are authorized for issuance; 10,000 have been issued as of December 31, 2016. In January of 2016, 18,069 restricted stock shares were issued under the terms of the 2015 Plan pursuant to awards granted under the 2006 Plan. Additional shares will not be issued pursuant to awards granted from prior plans. (b) Not applicable (c) The maximum number of shares of restricted stock that may be granted is 550,000 shares, and the maximum that may be granted to a participant during any calendar year is 75,000 shares. (d) No performance units payable in stock had been issued as of December 31, 2016. The maximum payment that can be made pursuant to performance units granted to any one participant in any calendar year shall be $1,000,000. (e) No SARS have been issued. The maximum number of shares with respect to which SARs may be granted to a participant during any calendar year shall be 100,000 shares. The following table details the shares available for future issuance under the 2015 Plan at December 31, 2016. Plan Category Shares Available for Future Issuance Shares available at January 1, 2016 550,000 Stock option issuances (10,000) Restricted stock issuances 0 Forfeitures 131 Shares available for future issuance 540,131 CTBI uses a Black-Scholes option pricing model with the following weighted average assumptions, which are evaluated and revised as necessary, in estimating the grant-date fair value of each option grant for the year end: 2016 2015 2014 Expected option life (in years) 7.5 7.5 7.5 Expected volatility 34.34% 43.11% 43.32% Expected dividend yield 3.70% 3.72% 3.40% Risk-free interest rate 1.45% 1.54% 2.01% The expected option life is derived from the “safe-harbor” rules for estimating option life in ASC 718, Share-Based Payment . The expected volatility is based on historical volatility of the stock using a historical look back that approximates the expected life of the option grant. The interest rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. CTBI's stock-based compensation expense for the years 2016, 2015, and 2014 was $0.5 million, $0.8 million, and $0.9 million, respectively. Included in stock-based compensation expense were dividends paid on restricted stock shares in the amount of $37 thousand, $80 thousand, and $121 thousand, respectively, for the same periods. The 2015 Plan: CTBI’s stock option activity for the 2015 Plan for the year ended December 31, 2016 is summarized as follows: December 31 2016 Options Weighted Average Exercise Price Outstanding at beginning of year 0 -- Granted 10,000 $ 33.55 Exercised 0 -- Forfeited/expired 0 -- Outstanding at end of year 10,000 $ 33.55 Exercisable at end of year 0 -- A summary of the status of CTBI’s 2015 Plan for nonvested options as of December 31, 2016, and changes during the year ended December 31, 2016, is presented as follows: Nonvested Options Options Weighted Average Grant Date Fair Value Nonvested at January 1, 2016 0 -- Granted 10,000 $ 6.82 Vested 0 -- Forfeited 0 -- Nonvested at December 31, 2016 10,000 $ 6.82 The weighted average remaining contractual term in years of the options outstanding at December 31, 2016 was 9.1 years. The weighted-average fair value of options granted from the 2015 Plan during the year 2016 was $0.07 million, or $6.82 per share. The following table shows the intrinsic values of options exercised, exercisable, and outstanding for the 2015 Plan for the years ended December 31, 2016: (in thousands) 2016 Options exercised -- Options exercisable -- Outstanding options $ 161 The following table shows restricted stock activity for the 2015 Plan for the year ended December 31, 2016: December 31 2016 Grants Weighted Average Fair Value at Grant Outstanding at beginning of year 0 $ -- Granted* 18,069 33.55 Vested (442 ) 33.55 Forfeited (131 ) 33.55 Outstanding at end of year 17,496 $ 33.55 * Issued under the terms of the 2015 Plan pursuant to awards granted and earned under the 2006 Plan. The 2006 Plan: CTBI’s stock option activity for the 2006 Plan for the years ended December 31, 2016, 2015, and 2014 is summarized as follows: December 31 2016 2015 2014 Options Weighted Average Exercise Price Options Weighted Average Exercise Price Options Weighted Average Exercise Price Outstanding at beginning of year 118,574 $ 32.36 98,821 $ 32.35 97,047 $ 32.29 Granted 0 -- 20,000 32.27 10,000 34.75 Exercised (57,423 ) 35.02 (247 ) 24.12 (5,757 ) 34.62 Forfeited/expired (110 ) 35.41 0 -- (2,469 ) 34.29 Outstanding at end of year 61,041 $ 29.84 118,574 $ 32.36 98,821 $ 32.35 Exercisable at end of year 30,629 $ 26.64 87,749 $ 32.12 86,264 $ 32.25 A summary of the status of CTBI’s 2006 Plan for nonvested options as of December 31, 2016, and changes during the year ended December 31, 2016, is presented as follows: Nonvested Options Options Weighted Average Grant Date Fair Value Nonvested at January 1, 2016 30,825 $ 7.02 Granted 0 -- Vested (413 ) 8.23 Forfeited 0 -- Nonvested at December 31, 2016 30,412 $ 7.00 The weighted average remaining contractual term in years of the options outstanding at December 31, 2016 was 4.6 years. There were no options granted from the 2006 Plan for the year 2016. The weighted-average fair value of options granted from the 2006 Plan during the years 2015 and 2014 were $0.13 million or $6.60 per share and $0.08 million or $7.76 per share; respectively. The following table shows the intrinsic values of options exercised, exercisable, and outstanding for the 2006 Plan for the years ended December 31, 2016, 2015, and 2014: (in thousands) 2016 2015 2014 Options exercised $ 139 $ 3 $ 11 Options exercisable 703 275 376 Outstanding options 1,206 334 421 The following table shows restricted stock activity for the years ended December 31, 2016, 2015, and 2014: December 31 2016 2015 2014 Grants Weighted Average Fair Value at Grant Grants Weighted Average Fair Value at Grant Grants Weighted Average Fair Value at Grant Outstanding at beginning of year 64,735 $ 28.92 101,309 $ 26.19 107,511 $ 25.91 Granted 0 -- 10,582 32.27 4,561 37.85 Vested (52,521 ) 28.01 (46,482 ) 23.66 (8,949 ) 28.35 Forfeited (225 ) 32.52 (674 ) 33.31 (1,814 ) 28.38 Outstanding at end of year 11,989 $ 32.85 64,735 $ 28.92 101,309 $ 26.19 The 1998 Plan: CTBI’s stock option activity for the 1998 Plan for the years ended December 31, 2016, 2015, and 2014 is summarized as follows: December 31 2016 2015 2014 Options Weighted Average Exercise Price Options Weighted Average Exercise Price Options Weighted Average Exercise Price Outstanding at beginning of year 2,980 $ 29.49 43,960 $ 29.43 78,066 $ 28.91 Granted 0 -- 0 -- 0 -- Exercised (2,980 ) 29.49 (40,980 ) 29.42 (34,106 ) 28.25 Forfeited/expired 0 -- 0 -- 0 -- Outstanding at end of year 0 -- 2,980 $ 29.49 43,960 $ 29.43 Exercisable at end of year 0 -- 2,980 $ 29.49 43,960 $ 29.43 There were no options outstanding in the 1998 Plan at December 31, 2016. The following table shows the intrinsic values of options exercised, exercisable, and outstanding for the 1998 Plan for the years ended December 31, 2016, 2015, and 2014: (in thousands) 2016 2015 2014 Options exercised $ 13 $ 241 $ 270 Options exercisable 0 16 316 Outstanding options 0 16 316 There were no nonvested options in the 1998 Plan for the years December 31, 2016, 2015, and 2014. The following table shows the unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the plans at December 31, 2016, 2015, and 2014 and the total grant-date fair value of shares vested, cash received from option exercises under all share-based payment arrangements, and the actual tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements for the years ended December 31, 2016, 2015, and 2014. (in thousands) 2016 2015 2014 Unrecognized compensation cost of unvested share-based compensation arrangements granted under the plan at year-end $ 835 $ 495 $ 861 Grant date fair value of shares vested for the year 1,490 1,111 343 Cash received from option exercises under all share-based payment arrangements for the year 2,099 1,212 1,163 Tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements for the year 3 82 93 The unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the plans at December 31, 2016 is expected to be recognized over a weighted-average period of 2.9 years.

Operating Leases

Operating Leases	12 Months Ended
	Dec. 31, 2016
Operating Leases [Abstract]
Operating Leases	16. Operating Leases Certain premises and equipment are leased under operating leases. Additionally, certain premises are leased or subleased to third parties. These leases generally contain renewal options and require CTBI to pay all executory costs, such as taxes, maintenance fees, and insurance. Minimum non-cancellable rental payments and rental receipts are as follows: (in thousands) Payments Receipts 2017 $ 2,010 $ 561 2018 1,501 350 2019 943 261 2020 725 227 2021 610 147 Thereafter 3,089 81 Total $ 8,878 $ 1,627 Rental expense net of rental income under operating leases was $1.3 million for 2016, $1.3 million for 2015, and $1.3 million for 2014.

Fair Market Value of Financial

Fair Market Value of Financial Assets and Liabilities	12 Months Ended
	Dec. 31, 2016
Fair Market Value of Financial Assets and Liabilities [Abstract]
Fair Market Value of Financial Assets and Liabilities	17. 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 December 31, 2016 and December 31, 2015 and indicate the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2016 Using 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 (in thousands) Fair Value Measurements at December 31, 2015 Using 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 $ 239,394 $ 44,702 $ 194,692 $ 0 State and political subdivisions 129,215 0 129,215 0 U.S. government sponsored agenc y mortgage-backed securities 201,576 0 201,576 0 CRA investment funds 24,751 24,751 0 0 Mortgage servicing rights 3,236 0 0 3,236 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 December 31, 2016 and December 31, 2015. There have been no significant changes in the valuation techniques during the year ended December 31, 2016. 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 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 December 31, 2016. 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: Mortgage Servicing Rights (in thousands) 2016 2015 Beginning balance $ 3,236 $ 2,968 Total recognized gains (losses) Included in net income 164 126 Issues 521 557 Settlements (488 ) (415 ) Ending balance $ 3,433 $ 3,236 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 $ 164 $ 126 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 (in thousands) 2016 2015 Total losses $ (324 ) $ (289 ) 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 December 31, 2016 and December 31, 2015 and indicate the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2016 Using 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 (in thousands) Fair Value Measurements at December 31, 2015 Using 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) $ 3,192 $ 0 $ 0 $ 3,192 Other real estate/assets owned 6,798 0 0 6,798 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 December 31, 2016 and December 31, 2015. (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 owned $ 4,388 Market comparable properties Comparability adjustments 10.0% - 100.0% (14.9%) (in thousands) Quantitative Information about Level 3 Fair Value Measurements Fair Value at December 31, 2015 Valuation Technique(s) Unobservable Input Range (Weighted Average) Mortgage servicing rights $ 3,236 Discount cash flows, computer pricing model Constant prepayment rate 6.1% - 22.4% (10.0%) Probability of default 0.0% - 100.0% (2.6%) Discount rate 10.0% - 11.5% (10.1%) Impaired loans (collateral-dependent) $ 3,192 Market comparable properties Marketability discount 0.0% - 76.7% (26.8%) Other real estate owned $ 6,798 Market comparable properties Comparability adjustments 5.0% - 51.8% (11.7%) 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 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 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 table presents estimated fair value of CTBI’s financial instruments as of December 31, 2015 and indicates the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2015 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 $ 187,611 $ 187,611 $ 0 $ 0 Certificates of deposit in other banks 3,832 0 3,836 0 Securities available-for-sale 594,936 69,453 525,483 0 Securities held-to-maturity 1,661 0 1,651 0 Loans held for sale 1,172 1,196 0 0 Loans, net 2,837,867 0 0 2,833,267 Federal Home Loan Bank stock 17,927 0 17,927 0 Federal Reserve Bank stock 4,887 0 4,887 0 Accrued interest receivable 12,194 0 12,194 0 Mortgage servicing rights 3,236 0 0 3,236 Financial liabilities: Deposits $ 2,980,782 $ 749,975 $ 2,208,120 $ 0 Repurchase agreements 251,225 0 0 250,873 Federal funds purchased 3,596 0 3,596 0 Advances from Federal Home Loan Bank 101,056 0 100,905 0 Long-term debt 61,341 0 0 49,073 Accrued interest payable 1,071 0 1,071 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.

Off-Balance Sheet Transactions

Off-Balance Sheet Transactions and Guarantees	12 Months Ended
	Dec. 31, 2016
Off-Balance Sheet Transactions and Guarantees [Abstract]
Off-Balance Sheet Transactions and Guarantees	18. Off-Balance Sheet Transactions and Guarantees CTBI is a party to transactions with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include standby letters of credit and commitments to extend credit in the form of unused lines of credit. CTBI uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. At December 31, CTBI had the following off-balance sheet financial instruments, whose approximate contract amounts represent additional credit risk to CTBI: (in thousands) 2016 2015 Standby letters of credit $ 29,917 $ 28,143 Commitments to extend credit 570,467 455,273 Total off-balance sheet financial instruments $ 600,384 $ 483,416 Standby letters of credit represent conditional commitments to guarantee the performance of a third party. The credit risk involved is essentially the same as the risk involved in making loans. At December 31, 2016, we maintained a credit loss reserve recorded in other liabilities of approximately $5 thousand relating to these financial standby letters of credit. The reserve coverage calculation was determined using essentially the same methodology as used for the allowance for loan and lease losses. Approximately 74% of the total standby letters of credit are secured, with $18.6 million of the total $29.9 million secured by cash. Collateral for the remaining secured standby letters of credit varies but is comprised primarily of accounts receivable, inventory, property, equipment, and income-producing properties. Commitments to extend credit are agreements to originate loans to customers as long as there is no violation of any condition of the contract. At December 31, 2016, a credit loss reserve recorded in other liabilities of $275 thousand was maintained relating to these commitments. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, commercial real estate, and residential real estate. A portion of the commitments is to extend credit at fixed rates. Fixed rate loan commitments at December 31, 2016 of $62.8 million had interest rates ranging predominantly from 3.00% to 5.00%, respectively, and terms predominantly two years or less. These credit commitments were based on prevailing rates, terms, and conditions applicable to other loans being made at December 31, 2016. Included in our commitments to extend credit are mortgage loans in the process of origination which are intended for sale to investors in the secondary market. These forward sale commitments are on an individual loan basis that CTBI originates as part of its mortgage banking activities. CTBI commits to sell the loans at specified prices in a future period, typically within 60 days. These commitments are acquired to reduce market risk on mortgage loans in the process of origination and mortgage loans held for sale since CTBI is exposed to interest rate risk during the period between issuing a loan commitment and the sale of the loan into the secondary market. Total mortgage loans in the process of origination amounted to $2.9 million and $3.2 million at December 31, 2016 and 2015, respectively, and mortgage loans held for sale amounted to $1.2 million for the years ended December 31, 2016 and 2015, respectively.

Concentrations of Credit Risk

Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2016
Concentrations of Credit Risk [Abstract]
Concentrations of Credit Risk	19. Concentrations of Credit Risk CTBI’s banking activities include granting commercial, residential, and consumer loans to customers primarily located in eastern, northeastern, central, and south central Kentucky, southern West Virginia, and northeastern Tennessee. CTBI is continuing to manage all components of its portfolio mix in a manner to reduce risk from changes in economic conditions. Concentrations of credit, as defined for regulatory purposes, are reviewed quarterly by management to ensure that internally established limits based on Tier 1 Capital plus the allowance for loan and lease losses are not exceeded. At December 31, 2016 and 2015, our concentrations of lessors of non-residential buildings credits were 45% and 44% of Tier 1 Capital plus the allowance for loan and lease losses, respectively. Lessors of residential buildings and dwellings were 37% and 36%, respectively. Hotel/motel industry credits were 41% and 34%, respectively. These percentages are within our internally established limits regarding concentrations of credit.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies [Abstract]
Commitments and Contingencies	20. Commitments and Contingencies CTBI and our subsidiaries, and from time to time, our officers, are named defendants in legal actions arising from ordinary business activities. Management, after consultation with legal counsel, believes any pending actions at December 31, 2016 are without merit or that the ultimate liability, if any, will not materially affect our consolidated financial position or results of operations. Based on a recent discussion with a regulatory agency representative concerning the status of an ongoing review of two CTB deposit add-on products, CTBI believes it is likely that it will be cited for two violations based on alleged unfair and deceptive practices with respect to such products. CTBI has evaluated the possible violations and their potential financial impact. Based upon this analysis, management established an accrual in 2014, which was not considered material, for possible customer reimbursements. We have not received a final written notice citing such violations and have not been informed as to the amount of, or relevant time period for, related reimbursement. The actual amount of reimbursement may materially vary from the amount management has evaluated as most likely at December 31, 2016, but it is not currently expected to be material to the financial statements.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2016
Regulatory Matters [Abstract]
Regulatory Matters	21. Regulatory Matters CTBI’s principal source of funds is dividends received from our banking subsidiary, CTB. Regulations limit the amount of dividends that may be paid by CTB without prior approval. During 2017, approximately $55.4 million plus any 2017 net profits can be paid by CTB without prior regulatory approval. The Federal Reserve Bank adopted quantitative measures which assign risk weightings to assets and off-balance sheet items and also define and set minimum regulatory capital requirements (risk based capital ratios). All banks are required to have a minimum Tier 1 (core capital) leverage ratio of 4% of adjusted quarterly average assets, common equity Tier 1 capital ratio of at least 4.5% of risk-weighted assets, Tier 1 capital of at least 6% of risk-weighted assets, and total capital of at least 8% of risk-weighted assets. Tier 1 capital consists principally of shareholders’ equity including capital-qualifying subordinated debt but excluding unrealized gains and losses on securities available-for-sale, less goodwill and certain other intangibles. Total capital consists of Tier 1 capital plus certain debt instruments and the reserve for credit losses, subject to limitation. Failure to meet certain capital requirements can initiate certain actions by regulators that, if undertaken, could have a direct material effect on our consolidated financial statements. The regulations also define well-capitalized levels of Tier 1 leverage, common equity Tier 1 capital, Tier 1, and total capital as 5%, 6.5%, 8%, and 10%, respectively. We had Tier 1 leverage, common equity Tier 1 capital, Tier 1, and total capital ratios above the well-capitalized levels at December 31, 2016 and 2015. We believe, as of December 31, 2016, CTBI meets all capital adequacy requirements for which it is subject to be defined as well-capitalized under the regulatory framework for prompt corrective action. Under the current Federal Reserve Board’s regulatory framework, certain capital securities offered by wholly owned unconsolidated trust preferred entities of CTBI are included as Tier 1 regulatory capital. On March 1, 2005, the Federal Reserve Board adopted a final rule that allows the continued limited inclusion of trust preferred securities in the Tier 1 capital of bank holding companies (“BHCs”). Under the final rule, trust preferred securities and other restricted core capital elements are subject to stricter quantitative limits. Consolidated Capital Ratios Actual For Capital Adequacy Purposes (in thousands) Amount Ratio Amount Ratio As of December 31, 2016: Tier 1 capital (to average assets) $ 496,432 12.75 % $ 155,743 4.00 % Common equity Tier 1 capital (to risk weighted assets) 436,932 15.18 129,525 4.50 Tier 1 capital (to risk weighted assets) 496,432 17.25 172,672 6.00 Total capital (to risk weighted assets) 532,332 18.50 230,198 8.00 As of December 31, 2015: Tier 1 capital (to average assets) $ 468,304 12.40 % $ 151,066 4.00 % Common equity Tier 1 capital (to risk weighted assets) 408,804 14.58 126,194 4.50 Tier 1 capital (to risk weighted assets) 468,304 16.70 168,253 6.00 Total capital (to risk weighted assets) 503,296 17.95 224,310 8.00 Community Trust Bank, Inc.’s Capital Ratios Actual For Capital Adequacy Purposes To Be Well-Capitalized Under Prompt Corrective Action Provision (in thousands) Amount Ratio Amount Ratio Amount Ratio As of December 31, 2016: Tier 1 capital (to average assets) $ 472,615 12.19 % $ 155,083 4.00 % $ 193,854 5.00 % Common equity Tier 1 capital (to risk weighted assets) 472,615 16.46 129,208 4.50 186,634 6.50 Tier 1 capital (to risk weighted assets) 472,615 16.46 172,278 6.00 229,704 8.00 Total capital (to risk weighted assets) 508,515 17.71 229,708 8.00 287,134 10.00 As of December 31, 2015: Tier 1 capital (to average assets) $ 445,107 11.84 % $ 150,374 4.00 % $ 187,967 5.00 % Common equity Tier 1 capital (to risk weighted assets) 445,107 15.91 125,895 4.50 181,848 6.50 Tier 1 capital (to risk weighted assets) 445,107 15.91 167,859 6.00 223,812 8.00 Total capital (to risk weighted assets) 480,099 17.16 223,822 8.00 279,778 10.00 On July 2, 2013, the Federal Reserve approved final rules that substantially amend the regulatory risk-based capital rules applicable to CTBI and CTB. The FDIC subsequently approved these rules. The final rules implement the “Basel III” regulatory capital reforms and changes required by the Dodd-Frank Act. The rules include new risk-based capital and leverage ratios, which are being phased in from 2015 to 2019, and refine the definition of what constitutes “capital” for purposes of calculating those ratios. The new minimum capital level requirements applicable to CTBI and CTB under the final rules are: (i) a new common equity Tier 1 capital ratio of 4.5%; (ii) a Tier 1 capital ratio of 6% (increased from 4%); (iii) a total capital ratio of 8% (unchanged from current rules); and (iv) a Tier 1 leverage ratio of 4% for all institutions. The final rules also establish a “capital conservation buffer” above the new regulatory minimum capital requirements, which must consist entirely of common equity Tier 1 capital. The capital conservation buffer began to be phased in on January 1, 2016 at 0.625% of risk-weighted assets and will increase by 0.625% annually until fully implemented in January 2019. An institution is subject to limitations on certain activities including payment of dividends, share repurchases, and discretionary bonuses to executive officers if its capital level is below the capital conservation buffer amount. The final rules also implement revisions and clarifications consistent with Basel III regarding the various components of Tier 1 capital, including common equity, unrealized gains and losses, as well as certain instruments that will no longer qualify as Tier 1 capital, some of which will be phased out over time. However, the final rules provide that small depository institution holding companies with less than $15 billion in total assets as of December 31, 2009 (which includes CTBI) will be able to permanently include non-qualifying instruments that were issued and included in Tier 1 or Tier 2 capital prior to May 19, 2010 in additional Tier 1 or Tier 2 capital until they redeem such instruments or until the instruments mature. The final rules also contain revisions to the prompt corrective action framework, which is designed to place restrictions on insured depository institutions, including the Bank, if their capital levels begin to show signs of weakness. These revisions took effect January 1, 2015. Under the prompt corrective action requirements, which are designed to complement the capital conservation buffer, insured depository institutions are required to meet the following increased capital level requirements in order to qualify as “well capitalized:” (i) a new common equity Tier 1 capital ratio of 6.5%; (ii) a Tier 1 capital ratio of 8% (increased from 6%); (iii) a total capital ratio of 10% (unchanged from previous rules); and (iv) a Tier 1 leverage ratio of 5% (unchanged from previous rules). The final rules set forth certain changes for the calculation of risk-weighted assets, which we were required to utilize beginning January 1, 2015. The standardized approach final rule utilizes an increased number of credit risk exposure categories and risk weights, and also addresses: (i) an alternative standard of creditworthiness consistent with Section 939A of the Dodd-Frank Act; (ii) revisions to recognition of credit risk mitigation; (iii) rules for risk weighting of equity exposures and past due loans; (iv) revised capital treatment for derivatives and repo-style transactions; and (v) disclosure requirements for top-tier banking organizations with $50 billion or more in total assets that are not subject to the “advance approach rules” that apply to banks with greater than $250 billion in consolidated assets. We currently satisfy the well-capitalized and capital conservation buffer standards, and based on our current capital composition and levels, we anticipate that our capital ratios, on a Basel III basis, will continue to exceed the well-capitalized minimum capital requirements and capital conservation buffer standards.

Parent Company Financial Statem

Parent Company Financial Statements	12 Months Ended
	Dec. 31, 2016
Parent Company Financial Statements [Abstract]
Parent Company Financial Statements	22. Parent Company Financial Statements Condensed Balance Sheets (in thousands) December 31 2016 2015 Assets: Cash on deposit $ 1,525 $ 1,462 Investment in and advances to subsidiaries 556,975 531,702 Goodwill 4,973 4,973 Premises and equipment, net 142 145 Other assets 391 911 Total assets $ 564,006 $ 539,193 Liabilities and shareholders’ equity: Long-term debt $ 61,341 $ 61,341 Other liabilities 2,050 2,269 Total liabilities 63,391 63,610 Shareholders’ equity 500,615 475,583 Total liabilities and shareholders’ equity $ 564,006 $ 539,193 Condensed Statements of Income and Comprehensive Income (in thousands) Year Ended December 31 2016 2015 2014 Income: Dividends from subsidiary banks $ 20,708 $ 19,808 $ 19,534 Other income 459 414 196 Total income 21,167 20,222 19,730 Expenses: Interest expense 1,417 1,170 1,131 Depreciation expense 107 130 153 Other expenses 2,256 2,465 2,550 Total expenses 3,780 3,765 3,834 Income before income taxes and equity in undistributed income of subsidiaries 17,387 16,457 15,896 Income tax benefit (1,373 ) (1,371 ) (1,548 ) Income before equity in undistributed income of subsidiaries 18,760 17,828 17,444 Equity in undistributed income of subsidiaries 28,586 28,604 25,807 Net income $ 47,346 $ 46,432 $ 43,251 Other comprehensive income (loss): Unrealized holding gains (losses) on securities available-for-sale: Unrealized holding gains (losses) arising during the period (4,578 ) (342 ) 13,928 Less: Reclassification adjustments for realized gains (losses) included in net income 522 (106 ) (211 ) Tax expense (benefit) (1,785 ) (83 ) 4,949 Other comprehensive income (loss), net of tax (3,315 ) (153 ) 9,190 Comprehensive income $ 44,031 $ 46,279 $ 52,441 Condensed Statements of Cash Flows (in thousands) Year Ended December 31 2016 2015 2014 Cash flows from operating activities: Net income $ 47,346 $ 46,432 $ 43,251 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation 107 130 153 Equity in undistributed earnings of subsidiaries (28,586 ) (28,604 ) (25,807 ) Stock-based compensation 458 783 838 Excess tax benefits of stock-based compensation 100 104 760 Changes in: Other assets 519 240 (558 ) Other liabilities (90 ) 968 563 Net cash provided by operating activities 19,854 20,053 19,200 Cash flows from investing activities: Purchase of premises and equipment (104 ) (45 ) (125 ) Repayment of investments in and advances to subsidiaries 0 0 (14 ) Net cash used in investing activities (104 ) (45 ) (139 ) Cash flows from financing activities: Issuance of common stock 2,985 2,082 1,992 Repurchase of common stock (382 ) (189 ) 0 Excess tax benefits of stock-based compensation (100 ) (104 ) (760 ) Dividends paid (22,190 ) (21,330 ) (20,570 ) Net cash used in financing activities (19,687 ) (19,541 ) (19,338 ) Net increase (decrease) in cash and cash equivalents 63 467 (277 ) Cash and cash equivalents at beginning of year 1,462 995 1,272 Cash and cash equivalents at end of year $ 1,525 $ 1,462 $ 995

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	23. Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share: Year Ended December 31 (in thousands except per share data) 2016 2015 2014 Numerator: Net income $ 47,346 $ 46,432 $ 43,251 Denominator: Basic earnings per share: Weighted average shares 17,548 17,431 17,326 Diluted earnings per share: Dilutive effect of equity grants 18 52 71 Adjusted weighted average shares 17,566 17,483 17,397 Earnings per share: Basic earnings per share $ 2.70 $ 2.66 $ 2.50 Diluted earnings per share 2.70 2.66 2.49 There were no options to purchase common shares that were excluded from the diluted calculations above for the year ended December 31, 2016. 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. Options to purchase 58,063 common shares were excluded from the diluted calculations above for the year ended December 31, 2015, because the exercise prices on the options were greater than the average market price for the period. There were no options to purchase common shares that were excluded from the diluted calculations above for the year ended December 31, 2014.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2016
Accumulated Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income	24. Accumulated Other Comprehensive Income Unrealized gains (losses) on AFS securities Amounts reclassified from accumulated other comprehensive income (AOCI) and the affected line items in the statements of income during the years ended December 31, 2016, 2015, and 2014 were: Amounts Reclassified from AOCI Year Ended December 31 (in thousands) 2016 2015 2014 Affected line item in the statements of income Securities gains (losses) $ 522 $ (106 ) $ (211 ) Tax expense (benefit) 183 (37 ) (74 ) Total reclassifications out of AOCI $ 339 $ (69 ) $ (137 )

Accounting Policies (Policies)

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation
Nature of Operations	Nature of Operations
Use of Estimates	Use of Estimates The accompanying financial statements have been prepared using values and information currently available to CTBI. Given the volatility of current economic conditions, the values of assets and liabilities recorded in the financial statements could change rapidly, resulting in material future adjustments in asset values, the allowance for loan and lease losses, and capital.
Cash and Cash Equivalents	Cash and Cash Equivalents
Certificates of Deposit in Other Banks	Certificates of Deposit in Other Banks
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, a charge off is taken, if necessary, in order that the remaining balance reflects the fair value estimated less costs to sell of the collateral then transferred to other real estate owned or other repossessed assets. 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.
Loans Held for Sale	Loans Held for Sale
Premises and Equipment	Premises and Equipment Depreciation and amortization are computed primarily using the straight-line method. Estimated useful lives range up to 40 years for buildings, 2 to 10 years for furniture, fixtures, and equipment, and up to the lease term for leasehold improvements. Capitalized leased assets are amortized on a straight-line basis over the lives of the respective leases.
Federal Home Loan Bank and Federal Reserve Stock	Federal Home Loan Bank and Federal Reserve Stock CTB is also a member of its regional Federal Reserve Bank. Federal Reserve Bank stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on the ultimate recovery par value. Both cash and stock dividends are reported as income.
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.
Goodwill and Core Deposit Intangible	Goodwill and Core Deposit Intangible Intangibles-Goodwill and Other The balance of goodwill, at $65.5 million, has not changed since January 1, 2014. The activity to core deposit intangible for the years ended December 31, 2016, 2015, and 2014 is shown below. Core Deposit Intangible: (in thousands) 2016 2015 2014 Beginning balance, January 1 $ 291 $ 477 $ 690 Amortization (158 ) (186 ) (213 ) Ending balance, December 31 $ 133 $ 291 $ 477 Amortization of core deposit intangible is estimated at approximately $0.1 million for year one, at which time core deposit intangible will be fully amortized.
Transfers of Financial Assets	Transfers of Financial Assets
Income Taxes	Income Taxes
Earnings Per Share ("EPS")	Earnings Per Share (“EPS”) Diluted EPS adjusts the number of weighted average shares of common stock outstanding by the dilutive effect of stock options, including restricted shares, as prescribed in ASC 718, Share-Based Payment
Segments	Segments
Bank Owned Life Insurance	Bank Owned Life Insurance
Mortgage Servicing Rights	Mortgage Servicing Rights Servicing Assets and Liabilities Fair Value Measurements
Share-Based Compensation	Share-Based Compensation Share-Based Payment
Comprehensive Income	Comprehensive Income
Transfers between Fair Value Hierarchy Levels	Transfers between Fair Value Hierarchy Levels –
Reclassifications	Reclassifications –
New Accounting Standards	New Accounting Standards Ø Elimination of Extraordinary Reporting Accounting Standards Update (“ASU”) Income Statement – Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items. The amendments in this ASU were effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Ø Intangibles – Goodwill and Other – Internal-Use Software – In April 2015, the FASB issued ASU No. 2015-05, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40) . The amendments in this update provided guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance did not change GAAP for a customer’s accounting for service contracts. In addition, the guidance in this update supersedes paragraph 350-40-25-16. Consequently, all software licenses within the scope of Subtopic 350-40 are accounted for consistent with other licenses of intangible assets. For public business entities, the amendments were effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2015. Ø Income Taxes Income Taxes (Topic 740) 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 will 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 are 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 Accounting Changes and Error Correction and Investments – Equity Method and Joint Ventures Accounting Changes and Error Corrections (Topic 250) and Investments -Equity Method and Joint Ventures (Topic 323): Amendments to SEC Paragraphs Pursuant to Staff Announcements at the September 22, 2016 and November 17, 2016 EITF Meetings Revenue from Contracts with Customers (Topic 606) Leases (Topic 842) Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

Accounting Policies (Tables)

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Activity to Core Deposit Intangible	The activity to core deposit intangible for the years ended December 31, 2016, 2015, and 2014 is shown below. Core Deposit Intangible: (in thousands) 2016 2015 2014 Beginning balance, January 1 $ 291 $ 477 $ 690 Amortization (158 ) (186 ) (213 ) Ending balance, December 31 $ 133 $ 291 $ 477

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2016
Securities [Abstract]
Amortized Cost and Fair Value of Securities	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 U.S. Treasury and government agencies $ 0 $ 0 $ 0 $ 0 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 December 31, 2015 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 $ 240,434 $ 311 $ (1,351 ) $ 239,394 State and political subdivisions 125,665 3,707 (157 ) 129,215 U.S. government sponsored agency mortgage-backed securities 202,282 1,564 (2,270 ) 201,576 Total debt securities 568,381 5,582 (3,778 ) 570,185 CRA investment funds 25,000 132 (381 ) 24,751 Total available-for-sale securities $ 593,381 $ 5,714 $ (4,159 ) $ 594,936 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury and government agencies $ 480 $ 0 $ (12 ) $ 468 State and political subdivisions 1,181 2 0 1,183 Total held-to-maturity securities $ 1,661 $ 2 $ (12 ) $ 1,651
Amortized Cost and Fair Value of Securities by Contractual Maturity	The amortized cost and fair value of securities at December 31, 2016 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 $ 104,396 $ 104,383 $ 0 $ 0 Due after one through five years 101,799 102,135 866 867 Due after five through ten years 60,047 60,358 0 0 Due after ten years 90,123 89,104 0 0 U.S. government sponsored agency mortgage-backed securities 227,574 225,056 0 0 Total debt securities 583,939 581,036 866 867 CRA investment funds 25,000 24,358 0 0 Total securities $ 608,939 $ 605,394 $ 866 $ 867
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 December 31, 2016 that are not deemed to be other-than-temporarily impaired. 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 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Losses Fair Value 12 Months or More U.S. Treasury and government agencies $ 0 $ 0 $ 0 Total temporarily impaired HTM securities $ 0 $ 0 $ 0 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, 2015 that are not deemed to be other-than-temporarily impaired. Available-for-Sale (in thousands) Amortized Cost Gross Unrealized Losses Fair Value Less Than 12 Months U.S. Treasury and government agencies $ 142,147 $ (487 ) $ 141,660 State and political subdivisions 11,190 (106 ) 11,084 U.S. government sponsored agency mortgage-backed securities 92,009 (899 ) 91,110 Total debt securities 245,346 (1,492 ) 243,854 CRA investment funds 10,000 (183 ) 9,817 Total <12 months temporarily impaired AFS securities 255,346 (1,675 ) 253,671 12 Months or More U.S. Treasury and government agencies 54,773 (864 ) 53,909 State and political subdivisions 3,187 (51 ) 3,136 U.S. government sponsored agency mortgage-backed securities 49,908 (1,371 ) 48,537 Total debt securities 107,868 (2,286 ) 105,582 CRA investment funds 5,000 (198 ) 4,802 Total ≥12 months temporarily impaired AFS securities 112,868 (2,484 ) 110,384 Total U.S. Treasury and government agencies 196,920 (1,351 ) 195,569 State and political subdivisions 14,377 (157 ) 14,220 U.S. government sponsored agency mortgage-backed securities 141,917 (2,270 ) 139,647 Total debt securities 353,214 (3,778 ) 349,436 CRA investment funds 15,000 (381 ) 14,619 Total temporarily impaired AFS securities $ 368,214 $ (4,159 ) $ 364,055 Held-to-Maturity (in thousands) Amortized Cost Gross Unrealized Losses Fair Value 12 Months or More U.S. Treasury and government agencies $ 480 $ (12 ) $ 468 Total temporarily impaired HTM securities $ 480 $ (12 ) $ 468

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2016
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) December 31 2016 December 31 2015 Commercial construction $ 66,998 $ 78,020 Commercial secured by real estate 1,085,428 1,052,919 Equipment lease financing 5,512 8,514 Commercial other 350,159 358,898 Real estate construction 57,966 61,750 Real estate mortgage 702,969 707,874 Home equity 91,511 89,450 Consumer direct 133,093 126,406 Consumer indirect 444,735 390,130 Total loans $ 2,938,371 $ 2,873,961
Nonaccrual Loans Segregated by Class of Loans	Nonaccrual loans segregated by class of loans were as follows: (in thousands) December 31 2016 December 31 2015 Commercial: Commercial construction $ 1,912 $ 3,402 Commercial secured by real estate 6,326 5,928 Commercial other 1,559 1,485 Residential: Real estate construction 11 249 Real estate mortgage 6,260 5,206 Home equity 555 183 Consumer: Consumer direct 0 110 Total nonaccrual loans $ 16,623 $ 16,563
Bank's Loan Portfolio Aging Analysis, Segregated by Class	The following tables present CTBI’s loan portfolio aging analysis, segregated by class, as of December 31, 2016 and 2015: 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 December 31, 2015 (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 $ 36 $ 6 $ 3,431 $ 3,473 $ 74,547 $ 78,020 $ 30 Commercial secured by real estate 2,947 622 7,923 11,492 1,041,427 1,052,919 3,757 Equipment lease financing 199 0 0 199 8,315 8,514 0 Commercial other 762 121 1,476 2,359 356,539 358,898 310 Residential: Real estate construction 443 62 291 796 60,954 61,750 55 Real estate mortgage 1,128 3,888 10,907 15,923 691,951 707,874 6,925 Home equity 527 148 580 1,255 88,195 89,450 448 Consumer: Consumer direct 835 479 126 1,440 124,966 126,406 126 Consumer indirect 2,133 814 395 3,342 386,788 390,130 395 Total $ 9,010 $ 6,140 $ 25,129 $ 40,279 $ 2,833,682 $ 2,873,961 $ 12,046 *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 December 31, 2016 and 2015: (in thousands) Commercial Construction Commercial Secured by Real Estate Equipment Leases Commercial Other Total 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 December 31, 2015 Pass $ 62,978 $ 937,196 $ 8,514 $ 312,100 $ 1,320,788 Watch 4,931 71,830 0 37,670 114,431 OAEM 2,206 13,765 0 963 16,934 Substandard 6,780 29,232 0 7,072 43,084 Doubtful 1,125 896 0 1,093 3,114 Total $ 78,020 $ 1,052,919 $ 8,514 $ 358,898 $ 1,498,351
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 December 31, 2016 and 2015: (in thousands) Real Estate Construction Real Estate Mortgage Home Equity Consumer Direct Consumer Indirect Total 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 December 31, 2015 Performing $ 61,446 $ 695,743 $ 88,819 $ 126,170 $ 389,735 $ 1,361,913 Nonperforming (1) 304 12,131 631 236 395 13,697 Total $ 61,750 $ 707,874 $ 89,450 $ 126,406 $ 390,130 $ 1,375,610 (1) A loan is considered nonperforming if it is 90 days or more past due 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 years ended December 31, 2016, 2015, and 2014: 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 December 31, 2015 (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 $ 2,861 $ 2,862 $ 0 $ 4,574 $ 200 Commercial secured by real estate 30,761 32,166 0 30,605 1,378 Commercial other 7,500 9,148 0 8,802 316 Real estate mortgage 1,744 1,744 0 1,179 50 Loans with a specific valuation allowance: Commercial construction 3,402 3,402 831 3,631 0 Commercial secured by real estate 2,660 2,768 1,227 2,349 7 Commercial other 960 1,153 403 836 1 Totals: Commercial construction 6,263 6,264 831 8,205 200 Commercial secured by real estate 33,421 34,934 1,227 32,954 1,385 Commercial other 8,460 10,301 403 9,638 317 Real estate mortgage 1,744 1,744 0 1,179 50 Total $ 49,888 $ 53,243 $ 2,461 $ 51,976 $ 1,952 December 31, 2014 (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 $ 5,653 $ 5,654 $ 0 $ 5,415 $ 205 Commercial secured by real estate 31,639 33,268 0 34,650 1,180 Commercial other 13,069 14,597 0 15,663 783 Real estate mortgage 1,277 1,277 0 1,507 53 Loans with a specific valuation allowance: Commercial construction 3,974 3,974 734 4,216 0 Commercial secured by real estate 2,718 2,876 827 4,376 11 Commercial other 738 862 181 531 1 Totals: Commercial construction 9,627 9,628 734 9,631 205 Commercial secured by real estate 34,357 36,144 827 39,026 1,191 Commercial other 13,807 15,459 181 16,194 784 Real estate mortgage 1,277 1,277 0 1,507 53 Total $ 59,068 $ 62,508 $ 1,742 $ 66,358 $ 2,233 *Cash basis interest is substantially the same as interest income recognized.
Troubled Debt Restructurings	Presented below, segregated by class of loans, are troubled debt restructurings that occurred during the years ended December 31, 2016 and 2015: 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 Year Ended December 31, 2015 (in thousands) Number of Loans Term Modification Rate Modification Combination Post-Modification Outstanding Balance Commercial: Commercial construction 3 $ 428 $ 0 $ 0 $ 428 Commercial secured by real estate 21 4,244 0 1,760 6,004 Commercial other 7 3,847 0 0 3,847 Residential: Real estate mortgage 3 0 0 848 848 Total troubled debt restructurings 34 $ 8,519 $ 0 $ 2,608 $ 11,127
Summary of Defaulted Restructured Loans	Presented below, segregated by class of loans, are loans that were modified as troubled debt restructurings within the past twelve months which have subsequently defaulted. CTBI considers a loan in default when it is 90 days or more past due or transferred to nonaccrual. (in thousands) Year Ended December 31, 2016 Number of Loans Recorded Balance Commercial: Commercial secured by real estate 1 $ 67 Commercial other 1 12 Total defaulted restructured loans 2 $ 79 (in thousands) Year Ended December 31, 2015 Number of Loans Recorded Balance Commercial: Commercial secured by real estate 3 $ 114 Total defaulted restructured loans 3 $ 114

Mortgage Banking and Servicin36

Mortgage Banking and Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2016
Mortgage Banking and Servicing Rights [Abstract]
Components of Mortgage Banking Income	The following table presents the components of mortgage banking income: (in thousands) Year Ended December 31 2016 2015 2014 Net gain on sale of loans held for sale $ 1,831 $ 1,978 $ 1,468 Net loan servicing income (expense) Servicing fees 1,239 1,197 1,129 Late fees 78 88 112 Ancillary fees 322 212 149 Fair value adjustments (324 ) (289 ) (830 ) Net loan servicing income 1,315 1,208 560 Mortgage banking income $ 3,146 $ 3,186 $ 2,028
Activity for Capitalized Mortgage Servicing Rights Using Fair Value Method	Activity for capitalized mortgage servicing rights using the fair value method is as follows: (in thousands) 2016 2015 2014 Fair value of MSRs, beginning of period $ 3,236 $ 2,968 $ 3,424 New servicing assets created 521 557 374 Change in fair value during the period due to: Time decay (1) (175 ) (168 ) (162 ) Payoffs (2) (313 ) (247 ) (202 ) Changes in valuation inputs or assumptions (3) 164 126 (466 ) Fair value of MSRs, end of period $ 3,433 $ 3,236 $ 2,968 (1) Represents decrease in value due to regularly scheduled loan principal payments and partial loan paydowns. (2) Represents decrease in value due to loans that paid off during the period. (3) Represents change in value resulting from market-driven changes in interest rates.

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Activity for Related Party Transactions	Activity for related party extensions of credit during 2016 and 2015 is as follows: (in thousands) 2016 2015 Related party extensions of credit, beginning of period $ 29,224 $ 37,473 New loans and advances on lines of credit 2,456 867 Repayments (4,599 ) (9,116 ) Related party extensions of credit, end of period $ 27,081 $ 29,224

Allowance for Loan and Lease 38

Allowance for Loan and Lease Losses (Tables)	12 Months Ended
	Dec. 31, 2016
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 December 31, 2016, 2015, and 2014: 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 ALLL Balance, beginning of year $ 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 Balance, end of year $ 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 2015 (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 ALLL Balance, beginning of year $ 2,896 $ 13,618 $ 119 $ 4,263 $ 534 $ 6,094 $ 756 $ 1,574 $ 4,593 $ 34,447 Provision charged to expense (707 ) 2,135 (40 ) 1,338 147 1,888 158 891 2,840 8,650 Losses charged off (3 ) (1,379 ) 0 (1,961 ) (135 ) (1,421 ) (129 ) (1,306 ) (3,536 ) (9,870 ) Recoveries 13 60 0 585 4 117 54 435 1,599 2,867 Balance, end of year $ 2,199 $ 14,434 $ 79 $ 4,225 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 36,094 Ending balance: Individually evaluated for impairment $ 831 $ 1,227 $ 0 $ 403 $ 0 $ 0 $ 0 $ 0 $ 0 $ 2,461 Collectively evaluated for impairment $ 1,368 $ 13,207 $ 79 $ 3,822 $ 550 $ 6,678 $ 839 $ 1,594 $ 5,496 $ 33,633 Loans Ending balance: Individually evaluated for impairment $ 6,263 $ 33,421 $ 0 $ 8,460 $ 0 $ 1,744 $ 0 $ 0 $ 0 $ 49,888 Collectively evaluated for impairment $ 71,757 $ 1,019,498 $ 8,514 $ 350,438 $ 61,750 $ 706,130 $ 89,450 $ 126,406 $ 390,130 $ 2,824,073 2014 (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 ALLL Balance, beginning of year $ 3,396 $ 14,535 $ 121 $ 5,238 $ 397 $ 4,939 $ 601 $ 1,127 $ 3,654 $ 34,008 Provision charged to expense (513 ) 941 (2 ) 1,545 258 2,173 265 1,207 2,881 8,755 Losses charged off (15 ) (2,163 ) 0 (3,141 ) (123 ) (1,058 ) (115 ) (1,326 ) (3,495 ) (11,436 ) Recoveries 28 305 0 621 2 40 5 566 1,553 3,120 Balance, end of year $ 2,896 $ 13,618 $ 119 $ 4,263 $ 534 $ 6,094 $ 756 $ 1,574 $ 4,593 $ 34,447 Ending balance: Individually evaluated for impairment $ 734 $ 827 $ 0 $ 181 $ 0 $ 0 $ 0 $ 0 $ 0 $ 1,742 Collectively evaluated for impairment $ 2,162 $ 12,791 $ 119 $ 4,082 $ 534 $ 6,094 $ 756 $ 1,574 $ 4,593 $ 32,705 Loans Ending balance: Individually evaluated for impairment $ 9,627 $ 34,357 $ 0 $ 13,807 $ 0 $ 1,277 $ 0 $ 0 $ 0 $ 59,068 Collectively evaluated for impairment $ 112,315 $ 914,269 $ 10,344 $ 338,241 $ 62,412 $ 711,188 $ 88,335 $ 122,136 $ 315,516 $ 2,674,756

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2016
Premises and Equipment [Abstract]
Schedule of Premises and Equipment	Premises and equipment are summarized as follows: (in thousands) December 31 2016 2015 Land and buildings $ 78,086 $ 76,709 Leasehold improvements 4,886 4,793 Furniture, fixtures, and equipment 36,831 35,382 Construction in progress 769 196 Total premises and equipment 120,572 117,080 Less accumulated depreciation and amortization (72,632 ) (68,892 ) Premises and equipment, net $ 47,940 $ 48,188

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	12 Months Ended
	Dec. 31, 2016
Other Real Estate Owned [Abstract]
Activity for Other Real Estate Owned	Activity for other real estate owned was as follows: (in thousands) 2016 2015 Beginning balance of other real estate owned $ 40,674 $ 36,776 New assets acquired 5,900 18,850 Capitalized costs 0 85 Fair value adjustments (1,214 ) (1,656 ) Sale of assets (9,504 ) (13,381 ) Ending balance of other real estate owned $ 35,856 $ 40,674
Major Classifications of Foreclosed Properties	The major classifications of foreclosed properties are shown in the following table: (in thousands) December 31 2016 2015 1-4 family $ 6,210 $ 7,493 Agricultural/farmland 93 116 Construction/land development/other 20,778 22,570 Multifamily 270 833 Non-farm/non-residential 8,505 9,662 Total foreclosed properties $ 35,856 $ 40,674

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2016
Deposits [Abstract]
Major Classifications of Deposits	Major classifications of deposits are categorized as follows: (in thousands) December 31 2016 2015 Noninterest bearing deposits $ 767,918 $ 749,975 NOW accounts 45,872 44,567 Money market deposits 649,917 614,911 Savings 404,558 382,131 Certificates of deposit and other time deposits of $100,000 or more 651,882 606,859 Certificates of deposit and other time deposits less than $100,000 561,161 582,339 Total deposits $ 3,081,308 $ 2,980,782
Maturities of Certificates of Deposits and Other Time Deposits	Maturities of certificates of deposits and other time deposits are presented below: Maturities by Period at December 31, 2016 (in thousands) Total Within 1 Year 2 Years 3 Years 4 Years 5 Years After 5 Years Certificates of deposit and other time deposits of $100,000 or more $ 651,882 $ 516,384 $ 56,494 $ 23,180 $ 24,074 $ 31,750 $ 0 Certificates of deposit and other time deposits less than $100,000 561,161 471,912 38,109 17,628 13,354 19,830 328 Total maturities $ 1,213,043 $ 988,296 $ 94,603 $ 40,808 $ 37,428 $ 51,580 $ 328

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2016
Borrowings [Abstract]
Schedule of Short-term Debt	Short-term debt is categorized as follows: (in thousands) December 31 2016 2015 Repurchase agreements $ 251,065 $ 251,225 Federal funds purchased 4,816 3,596 Total short-term debt $ 255,881 $ 254,821
Schedule of Long-term Debt	Long-term debt is categorized as follows: (in thousands) December 31 2016 2015 Junior subordinated debentures, 2.52%, due 6/1/37 $ 61,341 $ 61,341

Repurchase Agreements (Tables)

Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2016
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 December 31, 2016 and December 31, 2015 is presented in the following tables: 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 December 31, 2015 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 $ 19,184 $ 0 $ 10,401 $ 48,695 $ 78,280 State and political subdivisions 58,676 494 1,656 9,159 69,985 U.S. government sponsored agency mortgage-backed securities 27,810 6 12,278 62,866 102,960 Total $ 105,670 $ 500 $ 24,335 $ 120,720 $ 251,225

Advances from Federal Home Lo44

Advances from Federal Home Loan Bank (Tables)	12 Months Ended
	Dec. 31, 2016
Advances from Federal Home Loan Bank [Abstract]
Schedule of Federal Home Loan Bank Advances	Federal Home Loan Bank advances consisted of the following monthly amortizing and term borrowings at December 31: (in thousands) 2016 2015 Monthly amortizing $ 944 $ 1,056 Term 0 100,000 Total FHLB advances $ 944 $ 101,056
Advances from Federal Home Loan Bank Requiring Monthly Principal Payment Basis	The advances from the FHLB that require monthly principal payments were due for repayment as follows: Principal Payments Due by Period at December 31, 2016 (in thousands) Total Within 1 Year 2 Years 3 Years 4 Years 5 Years After 5 Years Outstanding advances, weighted average interest rate – 1.33% $ 944 $ 106 $ 404 $ 20 $ 20 $ 20 $ 374

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Taxes [Abstract]
Components of Provision for Income Taxes	The components of the provision for income taxes, exclusive of tax effect of unrealized securities gains and losses, are as follows: (in thousands) 2016 2015 2014 Current income tax expense $ 18,417 $ 18,416 $ 20,194 Deferred income tax expense (benefit) 701 115 (1,048 ) Total income tax expense $ 19,118 $ 18,531 $ 19,146
Reconciliation of Income Tax Expense at Statutory Rate to Actual Income Tax Expense	A reconciliation of income tax expense at the statutory rate to our actual income tax expense is shown below: (in thousands) 2016 2015 2014 Computed at the statutory rate $ 23,262 35.00 % $ 22,737 35.00 % $ 21,839 35.00 % Adjustments resulting from: Tax-exempt interest (1,289 ) (1.94 ) (1,275 ) (1.96 ) (1,204 ) (1.93 ) Housing and new markets credits (2,680 ) (4.03 ) (2,692 ) (4.14 ) (1,076 ) (1.72 ) Dividends received deduction (136 ) (0.20 ) (128 ) (0.20 ) (178 ) (0.29 ) Bank owned life insurance (518 ) (0.78 ) (549 ) (0.84 ) (503 ) (0.81 ) ESOP dividend deduction (313 ) (0.47 ) (298 ) (0.46 ) (284 ) (0.46 ) Other, net 792 1.18 736 1.13 552 0.89 Total $ 19,118 28.76 % $ 18,531 28.53 % $ 19,146 30.68 %
Components of Net Deferred Tax Liability	The components of the net deferred tax liability as of December 31 are as follows: (in thousands) 2016 2015 Deferred tax assets: Allowance for loan and lease losses $ 12,577 $ 12,633 Interest on nonperforming loans 806 806 Accrued expenses 1,883 2,087 Allowance for other real estate owned 1,898 2,185 Unrealized losses on available-for-sale securities 1,241 0 Other 282 665 Total deferred tax assets 18,687 18,376 Deferred tax liabilities: Depreciation and amortization (20,287 ) (20,150 ) FHLB stock dividends (3,460 ) (3,460 ) Loan fee income (536 ) (552 ) Mortgage servicing rights (1,202 ) (1,133 ) Capitalized lease obligations (65 ) (211 ) Unrealized gains on AFS securities 0 (544 ) Limited partnership investments (411 ) (650 ) Other (562 ) (596 ) Total deferred tax liabilities (26,523 ) (27,296 ) Net deferred tax liability $ (7,836 ) $ (8,920 )

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Shares to be Issued and Remaining Shares Available for Future Issuance	The following table provides detail of the number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance under all of CTBI's equity compensation plans as of December 31, 2016: Plan Category (shares in thousands) Number of Shares to Be Issued Upon Exercise Weighted Average Price Shares Available for Future Issuance Equity compensation plans approved by shareholders: Stock options 71 $ 30.36 540 (a) Restricted stock (c) (b) (a) Performance units (d) (b) (a) Stock appreciation rights (“SARs”) (e) (b) (a) Total 540 (a) Under the 2015 Plan, 550,000 shares are authorized for issuance; 10,000 have been issued as of December 31, 2016. In January of 2016, 18,069 restricted stock shares were issued under the terms of the 2015 Plan pursuant to awards granted under the 2006 Plan. Additional shares will not be issued pursuant to awards granted from prior plans. (b) Not applicable (c) The maximum number of shares of restricted stock that may be granted is 550,000 shares, and the maximum that may be granted to a participant during any calendar year is 75,000 shares. (d) No performance units payable in stock had been issued as of December 31, 2016. The maximum payment that can be made pursuant to performance units granted to any one participant in any calendar year shall be $1,000,000. (e) No SARS have been issued. The maximum number of shares with respect to which SARs may be granted to a participant during any calendar year shall be 100,000 shares. The following table details the shares available for future issuance under the 2015 Plan at December 31, 2016. Plan Category Shares Available for Future Issuance Shares available at January 1, 2016 550,000 Stock option issuances (10,000) Restricted stock issuances 0 Forfeitures 131 Shares available for future issuance 540,131
Schedule of Weighted Average Assumptions Used for Estimating Grant-Date Fair Value of Each Option Grant	CTBI uses a Black-Scholes option pricing model with the following weighted average assumptions, which are evaluated and revised as necessary, in estimating the grant-date fair value of each option grant for the year end: 2016 2015 2014 Expected option life (in years) 7.5 7.5 7.5 Expected volatility 34.34% 43.11% 43.32% Expected dividend yield 3.70% 3.72% 3.40% Risk-free interest rate 1.45% 1.54% 2.01%
Unrecognized Compensation Cost, Grant-Date Fair Value of Shares Vested, Cash Received from Option Exercises and Actual Tax Benefit Realized for Tax Deductions from Option Exercises	The following table shows the unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the plans at December 31, 2016, 2015, and 2014 and the total grant-date fair value of shares vested, cash received from option exercises under all share-based payment arrangements, and the actual tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements for the years ended December 31, 2016, 2015, and 2014. (in thousands) 2016 2015 2014 Unrecognized compensation cost of unvested share-based compensation arrangements granted under the plan at year-end $ 835 $ 495 $ 861 Grant date fair value of shares vested for the year 1,490 1,111 343 Cash received from option exercises under all share-based payment arrangements for the year 2,099 1,212 1,163 Tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements for the year 3 82 93
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Stock Option Activity	CTBI’s stock option activity for the 2015 Plan for the year ended December 31, 2016 is summarized as follows: December 31 2016 Options Weighted Average Exercise Price Outstanding at beginning of year 0 -- Granted 10,000 $ 33.55 Exercised 0 -- Forfeited/expired 0 -- Outstanding at end of year 10,000 $ 33.55 Exercisable at end of year 0 --
Summary for Status of Nonvested Options	A summary of the status of CTBI’s 2015 Plan for nonvested options as of December 31, 2016, and changes during the year ended December 31, 2016, is presented as follows: Nonvested Options Options Weighted Average Grant Date Fair Value Nonvested at January 1, 2016 0 -- Granted 10,000 $ 6.82 Vested 0 -- Forfeited 0 -- Nonvested at December 31, 2016 10,000 $ 6.82
Schedule of Intrinsic Values of Options Exercised, Exercisable, and Outstanding	The following table shows the intrinsic values of options exercised, exercisable, and outstanding for the 2015 Plan for the years ended December 31, 2016: (in thousands) 2016 Options exercised -- Options exercisable -- Outstanding options $ 161
Schedule of Restricted Stock Activity	The following table shows restricted stock activity for the 2015 Plan for the year ended December 31, 2016: December 31 2016 Grants Weighted Average Fair Value at Grant Outstanding at beginning of year 0 $ -- Granted* 18,069 33.55 Vested (442 ) 33.55 Forfeited (131 ) 33.55 Outstanding at end of year 17,496 $ 33.55 * Issued under the terms of the 2015 Plan pursuant to awards granted and earned under the 2006 Plan.
2006 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Stock Option Activity	CTBI’s stock option activity for the 2006 Plan for the years ended December 31, 2016, 2015, and 2014 is summarized as follows: December 31 2016 2015 2014 Options Weighted Average Exercise Price Options Weighted Average Exercise Price Options Weighted Average Exercise Price Outstanding at beginning of year 118,574 $ 32.36 98,821 $ 32.35 97,047 $ 32.29 Granted 0 -- 20,000 32.27 10,000 34.75 Exercised (57,423 ) 35.02 (247 ) 24.12 (5,757 ) 34.62 Forfeited/expired (110 ) 35.41 0 -- (2,469 ) 34.29 Outstanding at end of year 61,041 $ 29.84 118,574 $ 32.36 98,821 $ 32.35 Exercisable at end of year 30,629 $ 26.64 87,749 $ 32.12 86,264 $ 32.25
Summary for Status of Nonvested Options	A summary of the status of CTBI’s 2006 Plan for nonvested options as of December 31, 2016, and changes during the year ended December 31, 2016, is presented as follows: Nonvested Options Options Weighted Average Grant Date Fair Value Nonvested at January 1, 2016 30,825 $ 7.02 Granted 0 -- Vested (413 ) 8.23 Forfeited 0 -- Nonvested at December 31, 2016 30,412 $ 7.00
Schedule of Intrinsic Values of Options Exercised, Exercisable, and Outstanding	The following table shows the intrinsic values of options exercised, exercisable, and outstanding for the 2006 Plan for the years ended December 31, 2016, 2015, and 2014: (in thousands) 2016 2015 2014 Options exercised $ 139 $ 3 $ 11 Options exercisable 703 275 376 Outstanding options 1,206 334 421
Schedule of Restricted Stock Activity	The following table shows restricted stock activity for the years ended December 31, 2016, 2015, and 2014: December 31 2016 2015 2014 Grants Weighted Average Fair Value at Grant Grants Weighted Average Fair Value at Grant Grants Weighted Average Fair Value at Grant Outstanding at beginning of year 64,735 $ 28.92 101,309 $ 26.19 107,511 $ 25.91 Granted 0 -- 10,582 32.27 4,561 37.85 Vested (52,521 ) 28.01 (46,482 ) 23.66 (8,949 ) 28.35 Forfeited (225 ) 32.52 (674 ) 33.31 (1,814 ) 28.38 Outstanding at end of year 11,989 $ 32.85 64,735 $ 28.92 101,309 $ 26.19
1998 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Stock Option Activity	CTBI’s stock option activity for the 1998 Plan for the years ended December 31, 2016, 2015, and 2014 is summarized as follows: December 31 2016 2015 2014 Options Weighted Average Exercise Price Options Weighted Average Exercise Price Options Weighted Average Exercise Price Outstanding at beginning of year 2,980 $ 29.49 43,960 $ 29.43 78,066 $ 28.91 Granted 0 -- 0 -- 0 -- Exercised (2,980 ) 29.49 (40,980 ) 29.42 (34,106 ) 28.25 Forfeited/expired 0 -- 0 -- 0 -- Outstanding at end of year 0 -- 2,980 $ 29.49 43,960 $ 29.43 Exercisable at end of year 0 -- 2,980 $ 29.49 43,960 $ 29.43
Schedule of Intrinsic Values of Options Exercised, Exercisable, and Outstanding	The following table shows the intrinsic values of options exercised, exercisable, and outstanding for the 1998 Plan for the years ended December 31, 2016, 2015, and 2014: (in thousands) 2016 2015 2014 Options exercised $ 13 $ 241 $ 270 Options exercisable 0 16 316 Outstanding options 0 16 316

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2016
Operating Leases [Abstract]
Schedule of Minimum Non-Cancellable Rental Payments and Rental Receipts	Minimum non-cancellable rental payments and rental receipts are as follows: (in thousands) Payments Receipts 2017 $ 2,010 $ 561 2018 1,501 350 2019 943 261 2020 725 227 2021 610 147 Thereafter 3,089 81 Total $ 8,878 $ 1,627

Fair Market Value of Financia48

Fair Market Value of Financial Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
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 December 31, 2016 and December 31, 2015 and indicate the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2016 Using 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 (in thousands) Fair Value Measurements at December 31, 2015 Using 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 $ 239,394 $ 44,702 $ 194,692 $ 0 State and political subdivisions 129,215 0 129,215 0 U.S. government sponsored agenc y mortgage-backed securities 201,576 0 201,576 0 CRA investment funds 24,751 24,751 0 0 Mortgage servicing rights 3,236 0 0 3,236
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: Mortgage Servicing Rights (in thousands) 2016 2015 Beginning balance $ 3,236 $ 2,968 Total recognized gains (losses) Included in net income 164 126 Issues 521 557 Settlements (488 ) (415 ) Ending balance $ 3,433 $ 3,236 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 $ 164 $ 126
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 (in thousands) 2016 2015 Total losses $ (324 ) $ (289 )
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 December 31, 2016 and December 31, 2015 and indicate the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2016 Using 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 (in thousands) Fair Value Measurements at December 31, 2015 Using 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) $ 3,192 $ 0 $ 0 $ 3,192 Other real estate/assets owned 6,798 0 0 6,798
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 December 31, 2016 and December 31, 2015. (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 owned $ 4,388 Market comparable properties Comparability adjustments 10.0% - 100.0% (14.9%) (in thousands) Quantitative Information about Level 3 Fair Value Measurements Fair Value at December 31, 2015 Valuation Technique(s) Unobservable Input Range (Weighted Average) Mortgage servicing rights $ 3,236 Discount cash flows, computer pricing model Constant prepayment rate 6.1% - 22.4% (10.0%) Probability of default 0.0% - 100.0% (2.6%) Discount rate 10.0% - 11.5% (10.1%) Impaired loans (collateral-dependent) $ 3,192 Market comparable properties Marketability discount 0.0% - 76.7% (26.8%) Other real estate owned $ 6,798 Market comparable properties Comparability adjustments 5.0% - 51.8% (11.7%)
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 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 table presents estimated fair value of CTBI’s financial instruments as of December 31, 2015 and indicates the level within the fair value hierarchy of the valuation techniques. (in thousands) Fair Value Measurements at December 31, 2015 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 $ 187,611 $ 187,611 $ 0 $ 0 Certificates of deposit in other banks 3,832 0 3,836 0 Securities available-for-sale 594,936 69,453 525,483 0 Securities held-to-maturity 1,661 0 1,651 0 Loans held for sale 1,172 1,196 0 0 Loans, net 2,837,867 0 0 2,833,267 Federal Home Loan Bank stock 17,927 0 17,927 0 Federal Reserve Bank stock 4,887 0 4,887 0 Accrued interest receivable 12,194 0 12,194 0 Mortgage servicing rights 3,236 0 0 3,236 Financial liabilities: Deposits $ 2,980,782 $ 749,975 $ 2,208,120 $ 0 Repurchase agreements 251,225 0 0 250,873 Federal funds purchased 3,596 0 3,596 0 Advances from Federal Home Loan Bank 101,056 0 100,905 0 Long-term debt 61,341 0 0 49,073 Accrued interest payable 1,071 0 1,071 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

Off-Balance Sheet Transaction49

Off-Balance Sheet Transactions and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2016
Off-Balance Sheet Transactions and Guarantees [Abstract]
Off-Balance Sheet Financial Instruments	At December 31, CTBI had the following off-balance sheet financial instruments, whose approximate contract amounts represent additional credit risk to CTBI: (in thousands) 2016 2015 Standby letters of credit $ 29,917 $ 28,143 Commitments to extend credit 570,467 455,273 Total off-balance sheet financial instruments $ 600,384 $ 483,416

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2016
Regulatory Matters [Abstract]
Capital Amounts and Ratios	Consolidated Capital Ratios Actual For Capital Adequacy Purposes (in thousands) Amount Ratio Amount Ratio As of December 31, 2016: Tier 1 capital (to average assets) $ 496,432 12.75 % $ 155,743 4.00 % Common equity Tier 1 capital (to risk weighted assets) 436,932 15.18 129,525 4.50 Tier 1 capital (to risk weighted assets) 496,432 17.25 172,672 6.00 Total capital (to risk weighted assets) 532,332 18.50 230,198 8.00 As of December 31, 2015: Tier 1 capital (to average assets) $ 468,304 12.40 % $ 151,066 4.00 % Common equity Tier 1 capital (to risk weighted assets) 408,804 14.58 126,194 4.50 Tier 1 capital (to risk weighted assets) 468,304 16.70 168,253 6.00 Total capital (to risk weighted assets) 503,296 17.95 224,310 8.00 Community Trust Bank, Inc.’s Capital Ratios Actual For Capital Adequacy Purposes To Be Well-Capitalized Under Prompt Corrective Action Provision (in thousands) Amount Ratio Amount Ratio Amount Ratio As of December 31, 2016: Tier 1 capital (to average assets) $ 472,615 12.19 % $ 155,083 4.00 % $ 193,854 5.00 % Common equity Tier 1 capital (to risk weighted assets) 472,615 16.46 129,208 4.50 186,634 6.50 Tier 1 capital (to risk weighted assets) 472,615 16.46 172,278 6.00 229,704 8.00 Total capital (to risk weighted assets) 508,515 17.71 229,708 8.00 287,134 10.00 As of December 31, 2015: Tier 1 capital (to average assets) $ 445,107 11.84 % $ 150,374 4.00 % $ 187,967 5.00 % Common equity Tier 1 capital (to risk weighted assets) 445,107 15.91 125,895 4.50 181,848 6.50 Tier 1 capital (to risk weighted assets) 445,107 15.91 167,859 6.00 223,812 8.00 Total capital (to risk weighted assets) 480,099 17.16 223,822 8.00 279,778 10.00

Parent Company Financial Stat51

Parent Company Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2016
Parent Company Financial Statements [Abstract]
Condensed Balance Sheets	Condensed Balance Sheets (in thousands) December 31 2016 2015 Assets: Cash on deposit $ 1,525 $ 1,462 Investment in and advances to subsidiaries 556,975 531,702 Goodwill 4,973 4,973 Premises and equipment, net 142 145 Other assets 391 911 Total assets $ 564,006 $ 539,193 Liabilities and shareholders’ equity: Long-term debt $ 61,341 $ 61,341 Other liabilities 2,050 2,269 Total liabilities 63,391 63,610 Shareholders’ equity 500,615 475,583 Total liabilities and shareholders’ equity $ 564,006 $ 539,193
Condensed Statements of Income and Comprehensive Income	Condensed Statements of Income and Comprehensive Income (in thousands) Year Ended December 31 2016 2015 2014 Income: Dividends from subsidiary banks $ 20,708 $ 19,808 $ 19,534 Other income 459 414 196 Total income 21,167 20,222 19,730 Expenses: Interest expense 1,417 1,170 1,131 Depreciation expense 107 130 153 Other expenses 2,256 2,465 2,550 Total expenses 3,780 3,765 3,834 Income before income taxes and equity in undistributed income of subsidiaries 17,387 16,457 15,896 Income tax benefit (1,373 ) (1,371 ) (1,548 ) Income before equity in undistributed income of subsidiaries 18,760 17,828 17,444 Equity in undistributed income of subsidiaries 28,586 28,604 25,807 Net income $ 47,346 $ 46,432 $ 43,251 Other comprehensive income (loss): Unrealized holding gains (losses) on securities available-for-sale: Unrealized holding gains (losses) arising during the period (4,578 ) (342 ) 13,928 Less: Reclassification adjustments for realized gains (losses) included in net income 522 (106 ) (211 ) Tax expense (benefit) (1,785 ) (83 ) 4,949 Other comprehensive income (loss), net of tax (3,315 ) (153 ) 9,190 Comprehensive income $ 44,031 $ 46,279 $ 52,441
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows (in thousands) Year Ended December 31 2016 2015 2014 Cash flows from operating activities: Net income $ 47,346 $ 46,432 $ 43,251 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation 107 130 153 Equity in undistributed earnings of subsidiaries (28,586 ) (28,604 ) (25,807 ) Stock-based compensation 458 783 838 Excess tax benefits of stock-based compensation 100 104 760 Changes in: Other assets 519 240 (558 ) Other liabilities (90 ) 968 563 Net cash provided by operating activities 19,854 20,053 19,200 Cash flows from investing activities: Purchase of premises and equipment (104 ) (45 ) (125 ) Repayment of investments in and advances to subsidiaries 0 0 (14 ) Net cash used in investing activities (104 ) (45 ) (139 ) Cash flows from financing activities: Issuance of common stock 2,985 2,082 1,992 Repurchase of common stock (382 ) (189 ) 0 Excess tax benefits of stock-based compensation (100 ) (104 ) (760 ) Dividends paid (22,190 ) (21,330 ) (20,570 ) Net cash used in financing activities (19,687 ) (19,541 ) (19,338 ) Net increase (decrease) in cash and cash equivalents 63 467 (277 ) Cash and cash equivalents at beginning of year 1,462 995 1,272 Cash and cash equivalents at end of year $ 1,525 $ 1,462 $ 995

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
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: Year Ended December 31 (in thousands except per share data) 2016 2015 2014 Numerator: Net income $ 47,346 $ 46,432 $ 43,251 Denominator: Basic earnings per share: Weighted average shares 17,548 17,431 17,326 Diluted earnings per share: Dilutive effect of equity grants 18 52 71 Adjusted weighted average shares 17,566 17,483 17,397 Earnings per share: Basic earnings per share $ 2.70 $ 2.66 $ 2.50 Diluted earnings per share 2.70 2.66 2.49

Accumulated Other Comprehensi53

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2016
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 years ended December 31, 2016, 2015, and 2014 were: Amounts Reclassified from AOCI Year Ended December 31 (in thousands) 2016 2015 2014 Affected line item in the statements of income Securities gains (losses) $ 522 $ (106 ) $ (211 ) Tax expense (benefit) 183 (37 ) (74 ) Total reclassifications out of AOCI $ 339 $ (69 ) $ (137 )

Accounting Policies (Details)

Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)PaymentQuarterSegment	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Certificates of Deposits in Other Banks [Abstract]
Maturity period of certificates of deposit in other banks	18 months
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
Goodwill and Core Deposit Intangible [Abstract]
Goodwill	$ 65,490	$ 65,490
Finite-lived Intangible Assets [Roll Forward]
Beginning balance, January 1	291
Ending balance, December 31	$ 133	291
Segment Reporting [Abstract]
Number of operating segments | Segment	1
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
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Furniture, Fixtures, and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Furniture, Fixtures, and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Core Deposit Intangible [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning balance, January 1	$ 291	477	$ 690
Amortization	(158)	(186)	(213)
Ending balance, December 31	133	$ 291	$ 477
Amortization of intangible assets for year one	$ 100
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

Cash and Due from Banks and I55

Cash and Due from Banks and Interest Bearing Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Cash and Cash Equivalents [Line Items]
Balance requirements	$ 74.1	$ 69.4
Federal Reserve [Member]
Cash and Cash Equivalents [Line Items]
Cash accounts which exceeded federally insured limits	93.4
Fifth Third Bank [Member]
Cash and Cash Equivalents [Line Items]
Cash accounts which exceeded federally insured limits	23.3
Federal Home Loan Bank [Member]
Cash and Cash Equivalents [Line Items]
Cash accounts which exceeded federally insured limits	$ 2.2

Securities, Amortized Cost and

Securities, Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Debt Securities [Abstract]
Amortized cost	$ 583,939	$ 568,381
Gross unrealized gains	3,158	5,582
Gross unrealized losses	(6,061)	(3,778)
Fair value	581,036	570,185
Securities Available-for-Sale [Abstract]
Amortized cost	608,939	593,381
Gross unrealized gains	3,234	5,714
Gross unrealized losses	(6,779)	(4,159)
Available-for-sale securities	605,394	594,936
Securities Held-to-Maturity [Abstract]
Amortized cost	866	1,661
Gross unrealized gains	1	2
Gross unrealized losses	0	(12)
Fair value	867	1,651
U.S. Treasury and Government Agencies [Member]
Available-for-sale Debt Securities [Abstract]
Amortized cost	223,014	240,434
Gross unrealized gains	193	311
Gross unrealized losses	(743)	(1,351)
Fair value	222,464	239,394
State and Political Subdivisions [Member]
Available-for-sale Debt Securities [Abstract]
Amortized cost	133,351	125,665
Gross unrealized gains	1,957	3,707
Gross unrealized losses	(1,792)	(157)
Fair value	133,516	129,215
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale Debt Securities [Abstract]
Amortized cost	227,574	202,282
Gross unrealized gains	1,008	1,564
Gross unrealized losses	(3,526)	(2,270)
Fair value	225,056	201,576
CRA Investments Funds [Member]
Available-for-sale Equity Securities [Abstract]
Amortized cost	25,000	25,000
Gross unrealized gains	76	132
Gross unrealized losses	(718)	(381)
Fair value	24,358	24,751
U.S. Treasury and Government Agencies [Member]
Securities Held-to-Maturity [Abstract]
Amortized cost	0	480
Gross unrealized gains	0	0
Gross unrealized losses	0	(12)
Fair value	0	468
State and Political Subdivisions [Member]
Securities Held-to-Maturity [Abstract]
Amortized cost	866	1,181
Gross unrealized gains	1	2
Gross unrealized losses	0	0
Fair value	$ 867	$ 1,183

Securities, Amortized Cost an57

Securities, Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale, amortized cost [Abstract]
Due in one year or less	$ 104,396
Due after one through five years	101,799
Due after five through ten years	60,047
Due after ten years	90,123
U.S. government sponsored agency mortgage-backed securities	227,574
Amortized cost	583,939	$ 568,381
CRA investment funds	25,000
Amortized cost	608,939	593,381
Available-for-sale, fair value [Abstract]
Due in one year or less	104,383
Due after one through five years	102,135
Due after five through ten years	60,358
Due after ten years	89,104
U.S. government sponsored agency mortgage-backed securities	225,056
Total debt securities	581,036	570,185
CRA investment funds	24,358
Total securities	605,394	594,936
Held-to-maturity, amortized cost [Abstract]
Due in one year or less	0
Due after one through five years	866
Due after five through ten years	0
Due after ten years	0
U.S. government sponsored agency mortgage-backed securities	0
Amortized cost	866	1,661
CRA investment funds	0
Total securities	866
Held-to-maturity, fair value [Abstract]
Due in one year or less	0
Due after one through five years	867
Due after five through ten years	0
Due after ten years	0
U.S. government sponsored agency mortgage-backed securities	0
Total debt securities	867	$ 1,651
CRA investment funds	0
Total securities	$ 867

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	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Securities [Abstract]
Net gains (loss) on sales and calls of AFS securities	$ 522	$ (106)	$ (211)
Realized pre-tax gain on sale of securities	529
Pre-tax loss on sale of securities	7
Securities pledged as collateral to secure public deposit and for other purposes	221,200	228,200
Amortized cost of securities sold under agreements to repurchase	$ 303,500	$ 285,500

Securities, Securities in Conti

Securities, Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Securities [Abstract]
Percentage of total investment with unrealized losses	65.60%	61.10%
Available-for-sale, amortized cost [Abstract]
Less Than 12 Months	$ 365,662	$ 255,346
12 Months or More	38,763	112,868
Total	404,425	368,214
Available-for-sale, gross unrealized losses [Abstract]
Less Than 12 Months	(5,586)	(1,675)
12 Months or More	(1,193)	(2,484)
Total	(6,779)	(4,159)
Available-for-sale, fair value [Abstract]
Less Than 12 Months	360,076	253,671
12 Months or More	37,570	110,384
Total	397,646	364,055
Held-to-maturity, amortized cost [Abstract]
12 months or more	0	480
Held-to-maturity, gross unrealized losses [Abstract]
12 months or more	0	(12)
Held-to-maturity, fair value [Abstract]
12 months or more	0	468
U.S. Treasury and Government Agencies [Member]
Available-for-sale, amortized cost [Abstract]
Less Than 12 Months	158,732	142,147
12 Months or More	1,880	54,773
Total	160,612	196,920
Available-for-sale, gross unrealized losses [Abstract]
Less Than 12 Months	(716)	(487)
12 Months or More	(27)	(864)
Total	(743)	(1,351)
Available-for-sale, fair value [Abstract]
Less Than 12 Months	158,016	141,660
12 Months or More	1,853	53,909
Total	159,869	195,569
State and Political Subdivisions [Member]
Available-for-sale, amortized cost [Abstract]
Less Than 12 Months	53,491	11,190
12 Months or More	751	3,187
Total	54,242	14,377
Available-for-sale, gross unrealized losses [Abstract]
Less Than 12 Months	(1,780)	(106)
12 Months or More	(12)	(51)
Total	(1,792)	(157)
Available-for-sale, fair value [Abstract]
Less Than 12 Months	51,711	11,084
12 Months or More	739	3,136
Total	52,450	14,220
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale, amortized cost [Abstract]
Less Than 12 Months	135,939	92,009
12 Months or More	31,132	49,908
Total	167,071	141,917
Available-for-sale, gross unrealized losses [Abstract]
Less Than 12 Months	(2,646)	(899)
12 Months or More	(880)	(1,371)
Total	(3,526)	(2,270)
Available-for-sale, fair value [Abstract]
Less Than 12 Months	133,293	91,110
12 Months or More	30,252	48,537
Total	163,545	139,647
Debt Securities [Member]
Available-for-sale, amortized cost [Abstract]
Less Than 12 Months	348,162	245,346
12 Months or More	33,763	107,868
Total	381,925	353,214
Available-for-sale, gross unrealized losses [Abstract]
Less Than 12 Months	(5,142)	(1,492)
12 Months or More	(919)	(2,286)
Total	(6,061)	(3,778)
Available-for-sale, fair value [Abstract]
Less Than 12 Months	343,020	243,854
12 Months or More	32,844	105,582
Total	375,864	349,436
CRA Investment Funds [Member]
Available-for-sale, amortized cost [Abstract]
Less Than 12 Months	17,500	10,000
12 Months or More	5,000	5,000
Total	22,500	15,000
Available-for-sale, gross unrealized losses [Abstract]
Less Than 12 Months	(444)	(183)
12 Months or More	(274)	(198)
Total	(718)	(381)
Available-for-sale, fair value [Abstract]
Less Than 12 Months	17,056	9,817
12 Months or More	4,726	4,802
Total	$ 21,782	14,619
Severity of impairment in percentage of fair value less than cost	2.90%
U.S. Treasury and Government Agencies [Member]
Held-to-maturity, amortized cost [Abstract]
12 months or more	$ 0	480
Held-to-maturity, gross unrealized losses [Abstract]
12 months or more	0	(12)
Held-to-maturity, fair value [Abstract]
12 months or more	$ 0	$ 468

Loans, Major Classifications of

Loans, Major Classifications of Loans, Net of Income and Deferred Loan Origination Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)Segment	Dec. 31, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 2,938,371	$ 2,873,961
Number of portfolio segments | Segment	9
Loans held for sale [Abstract]
Loans held for sale	$ 1,244	1,172
Commercial [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	66,998	78,020
Commercial [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,085,428	1,052,919
Commercial [Member] | Equipment Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,512	8,514
Commercial [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	350,159	358,898
Residential [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	57,966	61,750
Residential [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	702,969	707,874
Residential [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	91,511	89,450
Consumer [Member] | Consumer Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	133,093	126,406
Consumer [Member] | Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 444,735	$ 390,130

Loans, Nonaccrual Loans Segrega

Loans, Nonaccrual Loans Segregated by Class of Loans and Loan Portfolio Aging Analysis, Segregated by Class (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		$ 16,623	$ 16,563
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		42,089	40,279
Current		2,896,282	2,833,682
Total Loans		2,938,371	2,873,961
90+ and Accruing	[1]	10,847	12,046
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		10,242	9,010
60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		7,324	6,140
90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		$ 24,523	25,129
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		$ 1,508,097	1,498,351
Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		1,912	3,402
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,962	3,473
Current		65,036	74,547
Total Loans		66,998	78,020
90+ and Accruing	[1]	28	30
Commercial [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		22	36
Commercial [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		0	6
Commercial [Member] | Construction [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,940	3,431
Commercial [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		6,326	5,928
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		11,358	11,492
Current		1,074,070	1,041,427
Total Loans		1,085,428	1,052,919
90+ and Accruing	[1]	3,015	3,757
Commercial [Member] | Real Estate [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		2,033	2,947
Commercial [Member] | Real Estate [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		478	622
Commercial [Member] | Real Estate [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		8,847	7,923
Commercial [Member] | Equipment Lease Financing [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		0	199
Current		5,512	8,315
Total Loans		5,512	8,514
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	199
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		1,559	1,485
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		2,354	2,359
Current		347,805	356,539
Total Loans		350,159	358,898
90+ and Accruing	[1]	141	310
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		997	762
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		122	121
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,235	1,476
Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		11	249
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		901	796
Current		57,065	60,954
Total Loans		57,966	61,750
90+ and Accruing	[1]	152	55
Residential [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		707	443
Residential [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		42	62
Residential [Member] | Construction [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		152	291
Residential [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		6,260	5,206
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		17,466	15,923
Current		685,503	691,951
Total Loans		702,969	707,874
90+ and Accruing	[1]	6,295	6,925
Residential [Member] | Real Estate [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,493	1,128
Residential [Member] | Real Estate [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		5,278	3,888
Residential [Member] | Real Estate [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		10,695	10,907
Residential [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		555	183
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		2,022	1,255
Current		89,489	88,195
Total Loans		91,511	89,450
90+ and Accruing	[1]	467	448
Residential [Member] | Home Equity [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		829	527
Residential [Member] | Home Equity [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		288	148
Residential [Member] | Home Equity [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		905	580
Consumer [Member] | Consumer Direct [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans segregated by class of loans		0	110
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		1,206	1,440
Current		131,887	124,966
Total Loans		133,093	126,406
90+ and Accruing	[1]	68	126
Consumer [Member] | Consumer Direct [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		873	835
Consumer [Member] | Consumer Direct [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		265	479
Consumer [Member] | Consumer Direct [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		68	126
Consumer [Member] | Consumer Indirect [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		4,820	3,342
Current		439,915	386,788
Total Loans		444,735	390,130
90+ and Accruing	[1]	681	395
Consumer [Member] | Consumer Indirect [Member] | 30-59 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		3,288	2,133
Consumer [Member] | Consumer Indirect [Member] | 60-89 Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		851	814
Consumer [Member] | Consumer Indirect [Member] | 90+ Days Past Due [Member]
Bank's Loan portfolio aging analysis, segregated by class [Abstract]
Total Past Due		$ 681	$ 395
[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		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		$ 2,938,371	$ 2,873,961
Consumer mortgage loans secured by real estate properties for which formal foreclosure proceedings are in process		3,500	4,400
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,508,097	1,498,351
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		$ 1,335,205	1,320,788
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		$ 88,215	114,431
Commercial [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		36,389	16,934
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		47,136	43,084
Commercial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,152	3,114
Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		66,998	78,020
Commercial [Member] | Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		55,315	62,978
Commercial [Member] | Construction [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		3,366	4,931
Commercial [Member] | Construction [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		2,535	2,206
Commercial [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		5,592	6,780
Commercial [Member] | Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		190	1,125
Commercial [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,085,428	1,052,919
Commercial [Member] | Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		975,383	937,196
Commercial [Member] | Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		51,932	71,830
Commercial [Member] | Real Estate [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		25,772	13,765
Commercial [Member] | Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		31,945	29,232
Commercial [Member] | Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		396	896
Commercial [Member] | Equipment Lease [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		5,512	8,514
Commercial [Member] | Equipment Lease [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		5,206	8,514
Commercial [Member] | Equipment Lease [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		137	0
Commercial [Member] | Equipment Lease [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		169	0
Commercial [Member] | Equipment Lease [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		0	0
Commercial [Member] | Equipment Lease [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		350,159	358,898
Commercial [Member] | Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		299,301	312,100
Commercial [Member] | Other [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		32,780	37,670
Commercial [Member] | Other [Member] | OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		7,913	963
Commercial [Member] | Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		9,599	7,072
Commercial [Member] | Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		566	1,093
Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		57,966	61,750
Residential [Member] | Construction [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		57,803	61,446
Residential [Member] | Construction [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	163	304
Residential [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		702,969	707,874
Residential [Member] | Real Estate [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		690,414	695,743
Residential [Member] | Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	12,555	12,131
Residential [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		91,511	89,450
Residential [Member] | Home Equity [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		90,489	88,819
Residential [Member] | Home Equity [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	1,022	631
Consumer [Member] | Consumer Direct [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		133,093	126,406
Consumer [Member] | Consumer Direct [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		133,025	126,170
Consumer [Member] | Consumer Direct [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	68	236
Consumer [Member] | Consumer Indirect [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		444,735	390,130
Consumer [Member] | Consumer Indirect [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		444,054	389,735
Consumer [Member] | Consumer Indirect [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	681	395
Residential and Consumer Portfolio Segments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,430,274	1,375,610
Residential and Consumer Portfolio Segments [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile		1,415,785	1,361,913
Residential and Consumer Portfolio Segments [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan portfolio based on credit risk profile	[1]	$ 14,489	$ 13,697
[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		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans with a specific valuation allowance [Abstract]
Specific Allowance		$ 1,313	$ 2,461	$ 1,742
Total impaired loans [Abstract]
Recorded Balance		52,202	49,888	59,068
Unpaid Contractual Principal Balance		55,888	53,243	62,508
Specific Allowance		1,313	2,461	1,742
Average Investment in Impaired Loans		55,679	51,976	66,358
Interest Income Recognized	[1]	2,530	1,952	2,233
Commercial [Member] | Construction [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		4,102	2,861	5,653
Unpaid Contractual Principal Balance		4,123	2,862	5,654
Average Investment in Impaired Loans		4,367	4,574	5,415
Interest Income Recognized	[1]	218	200	205
Loans with a specific valuation allowance [Abstract]
Recorded Balance		1,507	3,402	3,974
Unpaid Contractual Principal Balance		1,509	3,402	3,974
Specific Allowance		213	831	734
Average Investment in Impaired Loans		2,290	3,631	4,216
Interest Income Recognized	[1]	0	0	0
Total impaired loans [Abstract]
Recorded Balance		5,609	6,263	9,627
Unpaid Contractual Principal Balance		5,632	6,264	9,628
Specific Allowance		213	831	734
Average Investment in Impaired Loans		6,657	8,205	9,631
Interest Income Recognized	[1]	218	200	205
Commercial [Member] | Real Estate [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		29,025	30,761	31,639
Unpaid Contractual Principal Balance		29,594	32,166	33,268
Average Investment in Impaired Loans		31,136	30,605	34,650
Interest Income Recognized	[1]	1,609	1,378	1,180
Loans with a specific valuation allowance [Abstract]
Recorded Balance		4,731	2,660	2,718
Unpaid Contractual Principal Balance		5,885	2,768	2,876
Specific Allowance		1,035	1,227	827
Average Investment in Impaired Loans		4,151	2,349	4,376
Interest Income Recognized	[1]	19	7	11
Total impaired loans [Abstract]
Recorded Balance		33,756	33,421	34,357
Unpaid Contractual Principal Balance		35,479	34,934	36,144
Specific Allowance		1,035	1,227	827
Average Investment in Impaired Loans		35,287	32,954	39,026
Interest Income Recognized	[1]	1,628	1,385	1,191
Commercial [Member] | Other [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		11,215	7,500	13,069
Unpaid Contractual Principal Balance		13,155	9,148	14,597
Average Investment in Impaired Loans		11,561	8,802	15,663
Interest Income Recognized	[1]	632	316	783
Loans with a specific valuation allowance [Abstract]
Recorded Balance		139	960	738
Unpaid Contractual Principal Balance		139	1,153	862
Specific Allowance		65	403	181
Average Investment in Impaired Loans		483	836	531
Interest Income Recognized	[1]	0	1	1
Total impaired loans [Abstract]
Recorded Balance		11,354	8,460	13,807
Unpaid Contractual Principal Balance		13,294	10,301	15,459
Specific Allowance		65	403	181
Average Investment in Impaired Loans		12,044	9,638	16,194
Interest Income Recognized	[1]	632	317	784
Residential [Member] | Real Estate [Member]
Loans without a specific valuation allowance [Abstract]
Recorded Balance		1,483	1,744	1,277
Unpaid Contractual Principal Balance		1,483	1,744	1,277
Average Investment in Impaired Loans		1,691	1,179	1,507
Interest Income Recognized	[1]	52	50	53
Loans with a specific valuation allowance [Abstract]
Specific Allowance		0	0	0
Total impaired loans [Abstract]
Recorded Balance		1,483	1,744	1,277
Unpaid Contractual Principal Balance		1,483	1,744	1,277
Specific Allowance		0	0	0
Average Investment in Impaired Loans		1,691	1,179	1,507
Interest Income Recognized	[1]	$ 52	$ 50	$ 53
[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	12 Months Ended
	Dec. 31, 2016USD ($)Loan	Dec. 31, 2015USD ($)Loan
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	43	34
Post-Modification Outstanding Balance	$ 16,152	$ 11,127
Commitment to extend additional credit on loans modified	$ 100
Defaulted restructured loans, number of loans | Loan	2	3
Defaulted restructured loans, recorded balance	$ 79	$ 114
Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	15,203	8,519
Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0
Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 949	$ 2,608
Commercial [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	1	3
Post-Modification Outstanding Balance	$ 1,288	$ 428
Commercial [Member] | Construction [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	1,288	428
Commercial [Member] | Construction [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0
Commercial [Member] | Construction [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 0	$ 0
Commercial [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	27	21
Post-Modification Outstanding Balance	$ 9,408	$ 6,004
Defaulted restructured loans, number of loans | Loan	1	3
Defaulted restructured loans, recorded balance	$ 67	$ 114
Commercial [Member] | Real Estate [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	8,827	4,244
Commercial [Member] | Real Estate [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0
Commercial [Member] | Real Estate [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 581	$ 1,760
Commercial [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	14	7
Post-Modification Outstanding Balance	$ 5,175	$ 3,847
Defaulted restructured loans, number of loans | Loan	1
Defaulted restructured loans, recorded balance	$ 12
Commercial [Member] | Other [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	5,088	3,847
Commercial [Member] | Other [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0
Commercial [Member] | Other [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 87	$ 0
Residential [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	1	3
Post-Modification Outstanding Balance	$ 281	$ 848
Residential [Member] | Real Estate [Member] | Term Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0
Residential [Member] | Real Estate [Member] | Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	0	0
Residential [Member] | Real Estate [Member] | Combination [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Balance	$ 281	$ 848

Mortgage Banking and Servicin65

Mortgage Banking and Servicing Rights (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Mortgage Banking and Servicing Rights [Abstract]
Net gain on sale of loans held for sale		$ 1,831	$ 1,978	$ 1,468
Net loan servicing income (expense) [Abstract]
Servicing fees		1,239	1,197	1,129
Late fees		78	88	112
Ancillary fees		322	212	149
Fair value adjustments		(324)	(289)	(830)
Net loan servicing income		1,315	1,208	560
Mortgage banking income		3,146	3,186	2,028
Loan service for benefit of others		466,000	458,000	441,000
Custodial escrow balance		1,000	1,000	900
Activity for capitalized mortgage servicing rights using fair value method [Roll Forward]
Fair value of MSRs, beginning of period		3,236	2,968	3,424
New servicing assets created		521	557	374
Change in fair value during the period due to [Abstract]
Time decay	[1]	(175)	(168)	(162)
Payoffs	[2]	(313)	(247)	(202)
Changes in valuation inputs or assumptions	[3]	164	126	(466)
Fair value of MSRs, end of period		$ 3,433	$ 3,236	$ 2,968
Discount rate of servicing assets and servicing liabilities		10.10%	10.10%	10.10%
Weighted average default rates		3.02%	2.64%	3.61%
Prepayment speeds generated using Andrew Davidson Prepayment Model		9.50%	10.00%	11.30%
[1]	Represents decrease in value due to regularly scheduled loan principal payments and partial loan paydowns.
[2]	Represents decrease in value due to loans that paid off during the period.
[3]	Represents change in value resulting from market-driven changes in interest rates.

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans and Leases Receivable, Related Parties [Roll Forward]
Related party extensions of credit, beginning of period	$ 29,224	$ 37,473
New loans and advances on lines of credit	2,456	867
Repayments	(4,599)	(9,116)
Related party extensions of credit, end of period	27,081	29,224	$ 37,473
Related Party Transaction [Line Items]
Related party deposit	15,500	12,500
Legal fees	1,906	2,236	2,444
Director Who is Shareholder in Law Firm [Member] | Law Firm [Member]
Related Party Transaction [Line Items]
Legal fees	1,000	1,200	1,000
Expenses	100	100	100
Total payment to related party	$ 1,100	$ 1,300	$ 1,100

Allowance for Loan and Lease 67

Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for loan losses [Roll Forward]
Beginning balance	$ 36,094	$ 34,447	$ 34,008
Provision charged to expense	7,872	8,650	8,755
Losses charged off	(11,668)	(9,870)	(11,436)
Recoveries	3,635	2,867	3,120
Ending balance	35,933	36,094	34,447
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	1,313	2,461	1,742
Collectively evaluated for impairment	34,620	33,633	32,705
Loans ending balance [Abstract]
Individually evaluated for impairment	52,202	49,888	59,068
Collectively evaluated for impairment	2,886,169	2,824,073	2,674,756
Commercial [Member] | Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	2,199	2,896	3,396
Provision charged to expense	(1,035)	(707)	(513)
Losses charged off	(316)	(3)	(15)
Recoveries	36	13	28
Ending balance	884	2,199	2,896
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	213	831	734
Collectively evaluated for impairment	671	1,368	2,162
Loans ending balance [Abstract]
Individually evaluated for impairment	5,609	6,263	9,627
Collectively evaluated for impairment	61,389	71,757	112,315
Commercial [Member] | Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	14,434	13,618	14,535
Provision charged to expense	1,220	2,135	941
Losses charged off	(1,641)	(1,379)	(2,163)
Recoveries	178	60	305
Ending balance	14,191	14,434	13,618
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	1,035	1,227	827
Collectively evaluated for impairment	13,156	13,207	12,791
Loans ending balance [Abstract]
Individually evaluated for impairment	33,756	33,421	34,357
Collectively evaluated for impairment	1,051,672	1,019,498	914,269
Commercial [Member] | Equipment Lease Financing [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	79	119	121
Provision charged to expense	(37)	(40)	(2)
Losses charged off	0	0	0
Recoveries	0	0	0
Ending balance	42	79	119
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	42	79	119
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	5,512	8,514	10,344
Commercial [Member] | Other [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	4,225	4,263	5,238
Provision charged to expense	2,128	1,338	1,545
Losses charged off	(2,136)	(1,961)	(3,141)
Recoveries	439	585	621
Ending balance	4,656	4,225	4,263
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	65	403	181
Collectively evaluated for impairment	4,591	3,822	4,082
Loans ending balance [Abstract]
Individually evaluated for impairment	11,354	8,460	13,807
Collectively evaluated for impairment	338,805	350,438	338,241
Residential [Member] | Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	550	534	397
Provision charged to expense	264	147	258
Losses charged off	(192)	(135)	(123)
Recoveries	7	4	2
Ending balance	629	550	534
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	629	550	534
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	57,966	61,750	62,412
Residential [Member] | Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	6,678	6,094	4,939
Provision charged to expense	291	1,888	2,173
Losses charged off	(1,043)	(1,421)	(1,058)
Recoveries	101	117	40
Ending balance	6,027	6,678	6,094
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	6,027	6,678	6,094
Loans ending balance [Abstract]
Individually evaluated for impairment	1,483	1,744	1,277
Collectively evaluated for impairment	701,486	706,130	711,188
Residential [Member] | Home Equity [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	839	756	601
Provision charged to expense	(20)	158	265
Losses charged off	(54)	(129)	(115)
Recoveries	9	54	5
Ending balance	774	839	756
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	774	839	756
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	91,511	89,450	88,335
Consumer [Member] | Consumer Direct [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,594	1,574	1,127
Provision charged to expense	912	891	1,207
Losses charged off	(1,236)	(1,306)	(1,326)
Recoveries	615	435	566
Ending balance	1,885	1,594	1,574
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,885	1,594	1,574
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	133,093	126,406	122,136
Consumer [Member] | Consumer Indirect [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	5,496	4,593	3,654
Provision charged to expense	4,149	2,840	2,881
Losses charged off	(5,050)	(3,536)	(3,495)
Recoveries	2,250	1,599	1,553
Ending balance	6,845	5,496	4,593
Allowance for loan losses ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	6,845	5,496	4,593
Loans ending balance [Abstract]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	$ 444,735	$ 390,130	$ 315,516

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	$ 120,572	$ 117,080
Less accumulated depreciation and amortization	(72,632)	(68,892)
Premises and equipment, net	47,940	48,188
Depreciation and amortization of premises and equipment	3,700	3,700	$ 4,100
Land and Buildings [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	78,086	76,709
Leasehold Improvements [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	4,886	4,793
Furniture, Fixtures, and Equipment [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	36,831	35,382
Construction in Progress [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	$ 769	$ 196

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Activity for other real estate owned [Roll Forward]
Beginning balance of other real estate owned	$ 40,674	$ 36,776
New assets acquired	5,900	18,850
Capitalized costs	0	85
Fair value adjustments	(1,214)	(1,656)	$ (1,730)
Sale of assets	(9,504)	(13,381)
Ending balance of other real estate owned	35,856	40,674	36,776
Carrying cost and fair value adjustments for foreclosed properties	$ 2,900	$ 3,500	$ 3,900

Other Real Estate Owned, Major

Other Real Estate Owned, Major Classifications of Foreclosed Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	$ 35,856	$ 40,674	$ 36,776
1-4 Family [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	6,210	7,493
Agricultural/Farmland [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	93	116
Construction/Land Development/Other [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	20,778	22,570
Multifamily [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	270	833
Non-farm/Non-residential [Member]
Schedule of Foreclosed Properties [Line Items]
Total foreclosed properties	$ 8,505	$ 9,662

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Noninterest bearing deposits	$ 767,918	$ 749,975
NOW accounts	45,872	44,567
Money market deposits	649,917	614,911
Savings	404,558	382,131
Certificates of deposit and other time deposits of $100,000 or more	651,882	606,859
Certificates of deposit and other time deposits less than $100,000	561,161	582,339
Total deposits	3,081,308	2,980,782
Certificates of deposit and other time deposits of $250,000 or more	228,600	$ 190,600
Maturities of Time Deposits [Abstract]
Total	1,213,043
Within 1 Year	988,296
2 Years	94,603
3 Years	40,808
4 Years	37,428
5 Years	51,580
After 5 Years	328
Certificates of Deposit and Other Time Deposits of $100,000 or More [Member]
Maturities of Time Deposits [Abstract]
Total	651,882
Within 1 Year	516,384
2 Years	56,494
3 Years	23,180
4 Years	24,074
5 Years	31,750
After 5 Years	0
Certificates of Deposit and Other Time Deposits Less Than $100,000 [Member]
Maturities of Time Deposits [Abstract]
Total	561,161
Within 1 Year	471,912
2 Years	38,109
3 Years	17,628
4 Years	13,354
5 Years	19,830
After 5 Years	$ 328

Borrowings (Details)

Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Repurchase agreements	$ 251,065	$ 251,225
Federal funds purchased	4,816	3,596
Total short-term debt	255,881	$ 254,821
Maximum balance for repurchase agreements at any month-end	$ 264,500
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Average interest rate	0.54%
Repurchase Agreements [Member]
Short-term Debt [Line Items]
Average interest rate	0.51%
Average balance of repurchase agreements	$ 256,600

Borrowings, Line of Credit Faci

Borrowings, Line of Credit Facility (Details) - Revolving Credit Promissory Note [Member] $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)
Line of Credit Facility [Line Items]
Available amount under line of credit	$ 12
Basis spread on variable rate	2.00%
Description of variable rate basis	one-month LIBOR
Unused commitment fee	0.15%
Maturity date of line of credit	Oct. 31, 2017

Borrowings, Long-term Debt (Det

Borrowings, Long-term Debt (Details) - USD ($) $ in Thousands	Nov. 29, 2016	Apr. 02, 2007	Mar. 31, 2007	Dec. 31, 2016	Dec. 31, 2015
Junior Subordinated Debentures [Member]
Long-term debt [Abstract]
Issuance of debt			$ 61,341
Long-term debt				$ 61,341	$ 61,341
Interest rate on junior subordinated debentures	2.52%		6.52%
Maturity date of junior subordinated debentures				Jun. 1, 2037
Maturity period of debentures				30 years
Period after which debentures are redeemable				5 years
Description of variable rate basis				three-month LIBOR
Basis spread on variable rate	1.59%		1.59%
Repayment of debt		$ 61,341
LIBOR rate	0.93%
Junior Subordinated Debentures [Member] | Subordinated Debentures 9.0% [Member]
Long-term debt [Abstract]
Interest rate on junior subordinated debentures		9.00%
Junior Subordinated Debentures [Member] | Subordinated Debentures 8.25% [Member]
Long-term debt [Abstract]
Interest rate on junior subordinated debentures		8.25%
Unconsolidated Delaware Statutory Trust Subsidiary [Member]
Long-term debt [Abstract]
Issuance of capital securities in a private placement			$ 59,500

Repurchase Agreements (Details)

Repurchase Agreements (Details) - Securities Sold under Agreements to Repurchase [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
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	$ 302,300	$ 288,100
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	251,065	251,225
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	95,989	105,670
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	0	500
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	24,350	24,335
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	130,726	120,720
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	104,674	78,280
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	17,249	19,184
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	0	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	14,349	10,401
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	73,076	48,695
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	67,624	69,985
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	55,354	58,676
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	0	494
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	1,998	1,656
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	10,272	9,159
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	78,767	102,960
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	23,386	27,810
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	0	6
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	8,003	12,278
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	$ 47,378	$ 62,866

Advances from Federal Home Lo76

Advances from Federal Home Loan Bank (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	$ 944	$ 101,056
Monthly Amortizing Advances [Member]
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	944	1,056
Within 1 Year	106
2 Years	404
3 Years	20
4 Years	20
5 Years	20
After 5 Years	374
Short-term Advances [Member]
Federal Home Loan Bank, Advances [Line Items]
Total FHLB advances	0	$ 100,000
Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal home loan bank stock used as collateral for advances	17,900
FHLB maximum borrowing capacity	522,800
Federal home loan bank letters of credit used for public fund pledging	226,100
Federal home loan bank advances available	$ 295,800
Federal Home Loan Bank Advances [Member] | Minimum [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal home loan bank advances, interest rate	0.00%
Federal Home Loan Bank Advances [Member] | Maximum [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal home loan bank advances, interest rate	6.03%
Federal Home Loan Bank Advances [Member] | Weighted Average [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal home loan bank advances, interest rate	1.33%
Federal Home Loan Bank Advances [Member] | Monthly Amortizing Advances [Member] | Weighted Average [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal home loan bank advances, interest rate	1.33%	1.53%
Federal Home Loan Bank Advances [Member] | Short-term Advances [Member]
Federal Home Loan Bank, Advances [Line Items]
Maturity period of debt instrument	14 days
Federal Home Loan Bank Advances [Member] | Advance 0.34%, due 1/06/16 [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal home loan bank advances, interest rate		0.34%
Maturity date		Jan. 6, 2016

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of the provision for income taxes [Abstract]
Current income tax expense	$ 18,417	$ 18,416	$ 20,194
Deferred income tax expense (benefit)	701	115	(1,048)
Total income tax expense	19,118	18,531	19,146
Reconciliation of income tax expense at the statutory rate to actual income tax expense [Abstract]
Computed at the statutory rate	23,262	22,737	21,839
Adjustments resulting from [Abstract]
Tax-exempt interest	(1,289)	(1,275)	(1,204)
Housing and new markets credits	(2,680)	(2,692)	(1,076)
Dividends received deduction	(136)	(128)	(178)
Bank owned life insurance	(518)	(549)	(503)
ESOP dividend deduction	(313)	(298)	(284)
Other, net	792	736	552
Total income tax expense	$ 19,118	$ 18,531	$ 19,146
Reconciliation of income tax expense at the statutory rate to actual income tax expense [Abstract]
Computed at the statutory rate	35.00%	35.00%	35.00%
Adjustment resulting from [Abstract]
Tax-exempt interest	(1.94%)	(1.96%)	(1.93%)
Housing and new markets credits	(4.03%)	(4.14%)	(1.72%)
Dividends received deduction	(0.20%)	(0.20%)	(0.29%)
Bank owned life insurance	(0.78%)	(0.84%)	(0.81%)
ESOP dividend deduction	(0.47%)	(0.46%)	(0.46%)
Other, net	1.18%	1.13%	0.89%
Total	28.76%	28.53%	30.68%
Deferred tax assets [Abstract]
Allowance for loan and lease losses	$ 12,577	$ 12,633
Interest on nonperforming loans	806	806
Accrued expenses	1,883	2,087
Allowance for other real estate owned	1,898	2,185
Unrealized losses on available-for-sale securities	1,241	0
Other	282	665
Total deferred tax assets	18,687	18,376
Deferred tax liabilities [Abstract]
Depreciation and amortization	(20,287)	(20,150)
FHLB stock dividends	(3,460)	(3,460)
Loan fee income	(536)	(552)
Mortgage servicing rights	(1,202)	(1,133)
Capitalized lease obligations	(65)	(211)
Unrealized gains on AFS securities	0	(544)
Limited partnership investments	(411)	(650)
Other	(562)	(596)
Total deferred tax liabilities	(26,523)	(27,296)
Net deferred tax liability	$ (7,836)	$ (8,920)

Employee Benefits (Details)

Employee Benefits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)Planhshares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares
Employee Benefits [Abstract]
Number of retirement savings plan | Plan	2
Employee Stock Ownership Plan ("ESOP") [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Maximum annual contribution percentage under ESOP	4.00%
Contributions to ESOP by employer | $	$ 1.5	$ 1.5	$ 1.5
Number of allocated shares under ESOP (in shares) | shares	788,308	765,630	752,710
401(k) Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Minimum age of employees to participate in plan	21 years
Minimum requisite service period to participate in retirement plans	1 year
Minimum annual working hours required to participate in plan | h	1,000
Percentage of employee contribution, minimum	1.00%
Percentage of employee contribution, maximum	20.00%
Employer matching contribution	50.00%
Maximum contribution on employees gross pay	4.00%
Contribution by employer under 401(K) plan | $	$ 1	$ 1	$ 1
Number of allocated shares under 401 (K) plan (in shares) | shares	482,426	515,062	503,082

Employee Benefits, Stock-Based

Employee Benefits, Stock-Based Compensation (Details)		1 Months Ended	12 Months Ended
		Jan. 31, 2016$ / sharesshares	Dec. 31, 2016USD ($)Plan$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of active incentive stock option plan | Plan			1
Number of inactive incentive stock option plan | Plan			2
Number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance [Abstract]
Shares available for future issuance (in shares)			540,000
Black-Scholes option pricing model, weighted average assumptions [Abstract]
Stock-based compensation expense | $			$ 458,000	$ 783,000	$ 852,000
Dividends paid on restricted stock shares | $			37,000	80,000	121,000
Unrecognized compensation cost, grant date fair value of vested shares, cash received from option exercises, and actual tax benefit realized [Abstract]
Unrecognized compensation cost of unvested share-based compensation arrangements granted under the plan at year-end | $			835,000	495,000	861,000
Grant date fair value of shares vested for the year | $			1,490,000	1,111,000	343,000
Cash received from option exercises under all share-based payment arrangements for the year | $			2,099,000	1,212,000	1,163,000
Tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements for the year | $			$ 3,000	$ 82,000	$ 93,000
Expected period for recognition of unrecognized compensation cost			2 years 10 months 24 days
Stock Options [Member]
Number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance [Abstract]
Number of shares to be issued upon exercise (in shares)			71,000
Weighted average price (in dollars per share) | $ / shares			$ 30.36
Shares available for future issuance (in shares)	[1]		540,000
Black-Scholes option pricing model, weighted average assumptions [Abstract]
Expected option life			7 years 6 months	7 years 6 months	7 years 6 months
Expected volatility			34.34%	43.11%	43.32%
Expected dividend yield			3.70%	3.72%	3.40%
Risk-free interest rate			1.45%	1.54%	2.01%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)			550,000
Number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance [Abstract]
Number of shares to be issued upon exercise (in shares)	[2]
Weighted average price (in dollars per share) | $ / shares	[3]
Shares available for future issuance (in shares)	[1]
Maximum number of shares to be grant to a participant (in shares)			75,000
Performance Shares [Member]
Number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance [Abstract]
Number of shares to be issued upon exercise (in shares)	[4]
Weighted average price (in dollars per share) | $ / shares	[3]
Shares available for future issuance (in shares)	[1]
Maximum amount of shares to be grant to a participant | $			$ 1,000,000
Stock Appreciation Rights (SARs) [Member]
Number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance [Abstract]
Number of shares to be issued upon exercise (in shares)	[5]
Weighted average price (in dollars per share) | $ / shares	[3]
Shares available for future issuance (in shares)	[1]
Maximum number of shares to be grant to a participant (in shares)			100,000
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)			550,000
Shares available for future issuance [Abstract]
Shares available, beginning of period (in shares)		550,000	550,000
Forfeitures (in shares)			131
Shares available for future issuance (in shares)			540,131	550,000
2015 Plan [Member] | Stock Options [Member]
Shares available for future issuance [Abstract]
Issuances (in shares)			(10,000)
Options, number of shares [Roll Forward]
Outstanding, beginning of period (in shares)		0	0
Granted (in shares)			10,000
Exercised (in shares)			0
Forfeited/expired (in shares)			0
Outstanding, end of period (in shares)			10,000	0
Exercisable, end of period (in shares)			0
Options, weighted average exercise price [Abstract]
Outstanding, beginning of period (in dollars per share) | $ / shares		$ 0	$ 0
Granted (in dollars per share) | $ / shares			33.55
Exercised (in dollars per share) | $ / shares			0
Forfeited/expired (in dollars per share) | $ / shares			0
Outstanding, end of period (in dollars per share) | $ / shares			33.55	$ 0
Exercisable, end of period (in dollars per share) | $ / shares			$ 0
Nonvested options, number of shares [Roll Forward]
Nonvested, beginning of period (in shares)		0	0
Granted (in shares)			10,000
Vested (in shares)			0
Forfeited (in shares)			0
Nonvested, end of period (in shares)			10,000	0
Nonvested options, weighted average grant date fair value [Abstract]
Nonvested, beginning of period (in dollars per share) | $ / shares		$ 0	$ 0
Granted (in dollars per share) | $ / shares			6.82
Vested (in dollars per share) | $ / shares			0
Forfeited (in dollars per share) | $ / shares			0
Nonvested, end of period (in dollars per share) | $ / shares			$ 6.82	$ 0
Options, additional disclosures [Abstract]
Weighted average remaining contractual term			9 years 1 month 6 days
Weighted average fair value of options granted | $			$ 70,000
Intrinsic value of options exercised | $			0
Intrinsic value of options exercisable | $			0
Intrinsic value of outstanding options | $			$ 161,000
2015 Plan [Member] | Restricted Stock [Member]
Shares available for future issuance [Abstract]
Issuances (in shares)			0
Restricted stock activity, grants [Roll Forward]
Outstanding, beginning of period (in shares)		0	0
Granted (in shares)	[6]		18,069
Vested (in shares)			(442)
Forfeited (in shares)			(131)
Outstanding, end of period (in shares)			17,496	0
Restricted stock activity, weighted average fair value at grant [Roll Forward]
Outstanding, beginning of period (in dollars per share) | $ / shares		$ 0	$ 0
Granted (in dollars per share) | $ / shares	[6]		33.55
Vested (in dollars per share) | $ / shares			33.55
Forfeited (in dollars per share) | $ / shares			33.55
Outstanding, end of period (in dollars per share) | $ / shares			$ 33.55	$ 0
2006 Plan [Member] | Stock Options [Member]
Options, number of shares [Roll Forward]
Outstanding, beginning of period (in shares)		118,574	118,574	98,821	97,047
Granted (in shares)			0	20,000	10,000
Exercised (in shares)			(57,423)	(247)	(5,757)
Forfeited/expired (in shares)			(110)	0	(2,469)
Outstanding, end of period (in shares)			61,041	118,574	98,821
Exercisable, end of period (in shares)			30,629	87,749	86,264
Options, weighted average exercise price [Abstract]
Outstanding, beginning of period (in dollars per share) | $ / shares		$ 32.36	$ 32.36	$ 32.35	$ 32.29
Granted (in dollars per share) | $ / shares			0	32.27	34.75
Exercised (in dollars per share) | $ / shares			35.02	24.12	34.62
Forfeited/expired (in dollars per share) | $ / shares			35.41	0	34.29
Outstanding, end of period (in dollars per share) | $ / shares			29.84	32.36	32.35
Exercisable, end of period (in dollars per share) | $ / shares			$ 26.64	$ 32.12	$ 32.25
Nonvested options, number of shares [Roll Forward]
Nonvested, beginning of period (in shares)		30,825	30,825
Granted (in shares)			0	20,000	10,000
Vested (in shares)			(413)
Forfeited (in shares)			0
Nonvested, end of period (in shares)			30,412	30,825
Nonvested options, weighted average grant date fair value [Abstract]
Nonvested, beginning of period (in dollars per share) | $ / shares		$ 7.02	$ 7.02
Granted (in dollars per share) | $ / shares			0	$ 6.60	$ 7.76
Vested (in dollars per share) | $ / shares			8.23
Forfeited (in dollars per share) | $ / shares			0
Nonvested, end of period (in dollars per share) | $ / shares			$ 7	$ 7.02
Options, additional disclosures [Abstract]
Weighted average remaining contractual term			4 years 7 months 6 days
Weighted average fair value of options granted | $				$ 130,000	$ 80,000
Intrinsic value of options exercised | $			$ 139,000	3,000	11,000
Intrinsic value of options exercisable | $			703,000	275,000	376,000
Intrinsic value of outstanding options | $			$ 1,206,000	$ 334,000	$ 421,000
2006 Plan [Member] | Restricted Stock [Member]
Number of shares to be issued upon exercise of outstanding stock-based awards and remaining shares available for future issuance [Abstract]
Shares issued (in shares)		18,069
Restricted stock activity, grants [Roll Forward]
Outstanding, beginning of period (in shares)		64,735	64,735	101,309	107,511
Granted (in shares)			0	10,582	4,561
Vested (in shares)			(52,521)	(46,482)	(8,949)
Forfeited (in shares)			(225)	(674)	(1,814)
Outstanding, end of period (in shares)			11,989	64,735	101,309
Restricted stock activity, weighted average fair value at grant [Roll Forward]
Outstanding, beginning of period (in dollars per share) | $ / shares		$ 28.92	$ 28.92	$ 26.19	$ 25.91
Granted (in dollars per share) | $ / shares			0	32.27	37.85
Vested (in dollars per share) | $ / shares			28.01	23.66	28.35
Forfeited (in dollars per share) | $ / shares			32.52	33.31	28.38
Outstanding, end of period (in dollars per share) | $ / shares			$ 32.85	$ 28.92	$ 26.19
1998 Plan [Member] | Stock Options [Member]
Options, number of shares [Roll Forward]
Outstanding, beginning of period (in shares)		2,980	2,980	43,960	78,066
Granted (in shares)			0	0	0
Exercised (in shares)			(2,980)	(40,980)	(34,106)
Forfeited/expired (in shares)			0	0	0
Outstanding, end of period (in shares)			0	2,980	43,960
Exercisable, end of period (in shares)			0	2,980	43,960
Options, weighted average exercise price [Abstract]
Outstanding, beginning of period (in dollars per share) | $ / shares		$ 29.49	$ 29.49	$ 29.43	$ 28.91
Granted (in dollars per share) | $ / shares			0	0	0
Exercised (in dollars per share) | $ / shares			29.49	29.42	28.25
Forfeited/expired (in dollars per share) | $ / shares			0	0	0
Outstanding, end of period (in dollars per share) | $ / shares			0	29.49	29.43
Exercisable, end of period (in dollars per share) | $ / shares			$ 0	$ 29.49	$ 29.43
Nonvested options, number of shares [Roll Forward]
Nonvested, beginning of period (in shares)		0	0	0
Granted (in shares)			0	0	0
Nonvested, end of period (in shares)			0	0	0
Options, additional disclosures [Abstract]
Intrinsic value of options exercised | $			$ 13,000	$ 241,000	$ 270,000
Intrinsic value of options exercisable | $			0	16,000	316,000
Intrinsic value of outstanding options | $			$ 0	$ 16,000	$ 316,000
[1]	Under the 2015 Plan, 550,000 shares are authorized for issuance; 10,000 have been issued as of December 31, 2016. In January of 2016, 18,069 restricted stock shares were issued under the terms of the 2015 Plan pursuant to awards granted under the 2006 Plan. Additional shares will not be issued pursuant to awards granted from prior plans.
[2]	The maximum number of shares of restricted stock that may be granted is 550,000 shares, and the maximum that may be granted to a participant during any calendar year is 75,000 shares.
[3]	Not applicable
[4]	No performance units payable in stock had been issued as of December 31, 2016. The maximum payment that can be made pursuant to performance units granted to any one participant in any calendar year shall be $1,000,000.
[5]	No SARS have been issued. The maximum number of shares with respect to which SARs may be granted to a participant during any calendar year shall be 100,000 shares.
[6]	Issued under the terms of the 2015 Plan pursuant to awards granted and earned under the 2006 Plan.

Operating Leases (Details)

Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Payments [Abstract]
2,017	$ 2,010
2,018	1,501
2,019	943
2,020	725
2,021	610
Thereafter	3,089
Total	8,878
Receipts [Abstract]
2,017	561
2,018	350
2,019	261
2,020	227
2,021	147
Thereafter	81
Total	1,627
Rental expense net of rental income under operating leases	$ 1,300	$ 1,300	$ 1,300

Fair Market Value of Financia81

Fair Market Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 605,394	$ 594,936
Impaired loan (collateral dependent) [Abstract]
Impaired loans, fair value adjustments	600	1,800
Other real estate owned [Abstract]
Other real estate /assets owned, fair value adjustment	1,200	1,700
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	$ (324)	(289)	$ (830)
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
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 69,292	69,453
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	536,102	525,483
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	3,433	3,236
Recurring [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	222,464	239,394
Recurring [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	133,516	129,215
Recurring [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	225,056	201,576
Recurring [Member] | CRA Investment Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,358	24,751
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [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	44,934	44,702
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [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
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [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
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | CRA Investment Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	24,358	24,751
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	0	0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [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	177,530	194,692
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	133,516	129,215
Recurring [Member] | Significant Other Observable Inputs (Level 2) [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	225,056	201,576
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | CRA Investment Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage servicing rights	3,433	3,236
Recurring [Member] | Significant Unobservable Inputs (Level 3) [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
Recurring [Member] | Significant Unobservable Inputs (Level 3) [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
Recurring [Member] | Significant Unobservable Inputs (Level 3) [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
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | CRA Investment Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	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	3,236	2,968
Total recognized gains (losses) Included in net income	164	126
Issues	521	557
Settlements	(488)	(415)
Ending balance	3,433	3,236	$ 2,968
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	164	126
Nonrecurring [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	5,506	3,192
Other real estate /assets owned	4,388	6,798
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	0	0
Other real estate /assets owned	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	0	0
Other real estate /assets owned	0	0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets measured-nonrecurring basis [Abstract]
Impaired loans (collateral dependent)	5,506	3,192
Other real estate /assets owned	$ 4,388	$ 6,798

Fair Market Value of Financia82

Fair Market Value of Financial Assets and Liabilities, Quantitative Information about Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Mortgage Servicing Rights [Member] | Discount Cash Flows, Computer Pricing Model [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 3,433	$ 3,236
Mortgage Servicing Rights [Member] | Discount Cash Flows, Computer Pricing Model [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	7.00%	6.10%
Probability of default	0.00%	0.00%
Discount rate	10.00%	10.00%
Mortgage Servicing Rights [Member] | Discount Cash Flows, Computer Pricing Model [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	27.00%	22.40%
Probability of default	100.00%	100.00%
Discount rate	11.50%	11.50%
Mortgage Servicing Rights [Member] | Discount Cash Flows, Computer Pricing Model [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	9.50%	10.00%
Probability of default	3.00%	2.60%
Discount rate	10.10%	10.10%
Impaired Loans (Collateral Dependent) [Member] | Market Comparable Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 5,506	$ 3,192
Impaired Loans (Collateral Dependent) [Member] | Market Comparable Properties [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Unobservable inputs [Abstract]
Marketability discount	0.00%	0.00%
Impaired Loans (Collateral Dependent) [Member] | Market Comparable Properties [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Unobservable inputs [Abstract]
Marketability discount	100.00%	76.70%
Impaired Loans (Collateral Dependent) [Member] | Market Comparable Properties [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Unobservable inputs [Abstract]
Marketability discount	33.70%	26.80%
Other Real Estate Owned [Member] | Market Comparable Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 4,388	$ 6,798
Other Real Estate Owned [Member] | Market Comparable Properties [Member] | Significant Unobservable Inputs (Level 3) [Member] | Minimum [Member]
Unobservable inputs [Abstract]
Comparability adjustments	10.00%	5.00%
Other Real Estate Owned [Member] | Market Comparable Properties [Member] | Significant Unobservable Inputs (Level 3) [Member] | Maximum [Member]
Unobservable inputs [Abstract]
Comparability adjustments	100.00%	51.80%
Other Real Estate Owned [Member] | Market Comparable Properties [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Unobservable inputs [Abstract]
Comparability adjustments	14.90%	11.70%

Fair Market Value of Financia83

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	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financial assets [Abstract]
Securities available-for-sale	$ 605,394	$ 594,936
Securities held-to-maturity	867	1,651
Mortgage servicing rights	3,433	3,236	$ 2,968	$ 3,424
Carrying Amount [Member]
Financial assets [Abstract]
Cash and cash equivalents	144,716	187,611
Certificates of deposits in other banks	980	3,832
Securities available-for-sale	605,394	594,936
Securities held-to-maturity	866	1,661
Loans held for sale	1,244	1,172
Loans, net	2,902,438	2,837,867
Federal Home Loan Bank stock	17,927	17,927
Federal Reserve Bank stock	4,887	4,887
Accrued interest receivable	11,922	12,194
Mortgage servicing rights	3,433	3,236
Financial liabilities [Abstract]
Deposits	3,081,308	2,980,782
Repurchase agreements	251,065	251,225
Federal funds purchased	4,816	3,596
Advances from Federal Home Loan Bank	944	101,056
Long-term debt	61,341	61,341
Accrued interest payable	1,200	1,071
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	144,716	187,611
Certificates of deposits in other banks	0	0
Securities available-for-sale	69,292	69,453
Securities held-to-maturity	0	0
Loans held for sale	1,260	1,196
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	767,918	749,975
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	982	3,836
Securities available-for-sale	536,102	525,483
Securities held-to-maturity	867	1,651
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	11,922	12,194
Mortgage servicing rights	0	0
Financial liabilities [Abstract]
Deposits	2,321,690	2,208,120
Repurchase agreements	0	0
Federal funds purchased	4,816	3,596
Advances from Federal Home Loan Bank	1,009	100,905
Long-term debt	0	0
Accrued interest payable	1,200	1,071
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
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Loans held for sale	0	0
Loans, net	2,882,348	2,833,267
Federal Home Loan Bank stock	0	0
Federal Reserve Bank stock	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	3,433	3,236
Financial liabilities [Abstract]
Deposits	0	0
Repurchase agreements	250,820	250,873
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

Off-Balance Sheet Transaction84

Off-Balance Sheet Transactions and Guarantees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total off-balance sheet financial instruments	$ 600,384	$ 483,416
Percentage of secured standby letters of credit	74.00%
Standby letters of credit secured by cash	$ 18,600
Fixed rate loan commitments amount	$ 62,800
Period of commitment to sell the loans at specified prices	60 days
Total mortgage loans in process	$ 2,900	3,200
Mortgage loans held for sale	$ 1,244	1,172
Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Interest rate on loan commitments	3.00%
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Interest rate on loan commitments	5.00%
Fixed rate loan commitments term	2 years
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total off-balance sheet financial instruments	$ 29,917	28,143
Credit loss reserve	5
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total off-balance sheet financial instruments	570,467	$ 455,273
Credit loss reserve	$ 275

Concentrations of Credit Risk (

Concentrations of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Lessors of Non-residential Buildings Credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk	45.00%	44.00%
Lessors of Residential Buildings and Dwellings Credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk	37.00%	36.00%
Hotel/Motel Industry Credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk	41.00%	34.00%

Commitments and Contingencies (

Commitments and Contingencies (Details) - Unfavorable Regulatory Action [Member]	12 Months Ended
	Dec. 31, 2016ReviewViolation
Loss Contingencies [Line Items]
Number of CTB deposit add-on products under review | Review	2
Number of likely violations | Violation	2

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Tier I capital (to average assets), Amount [Abstract]
Actual Amount	$ 496,432	$ 468,304
For Capital Adequacy Purposes	$ 155,743	$ 151,066
Tier I capital (to average assets), Ratio [Abstract]
Actual Ratio	12.75%	12.40%
For Capital Adequacy Purposes	4.00%	4.00%
Common equity Tier 1 capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 436,932	$ 408,804
For Capital Adequacy Purposes	$ 129,525	$ 126,194
Common equity Tier 1 capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	15.18%	14.58%
For Capital Adequacy Purposes	4.50%	4.50%
Tier I capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 496,432	$ 468,304
For Capital Adequacy Purposes	$ 172,672	$ 168,253
Tier I capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	17.25%	16.70%
For Capital Adequacy Purposes	6.00%	6.00%
Total capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 532,332	$ 503,296
For Capital Adequacy Purposes	$ 230,198	$ 224,310
Total capital (to risk-weighted assets), Ratio [Abstract]
Actual Ratio	18.50%	17.95%
For Capital Adequacy Purposes	8.00%	8.00%
Community Trust Bank, Inc [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Maximum dividend without Approval	$ 55,400
Tier I capital (to average assets), Amount [Abstract]
Actual Amount	472,615	$ 445,107
For Capital Adequacy Purposes	155,083	150,374
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 193,854	$ 187,967
Tier I capital (to average assets), Ratio [Abstract]
Actual Ratio	12.19%	11.84%
For Capital Adequacy Purposes	4.00%	4.00%
To Be Well-Capitalized Under Prompt Corrective Action Provision	5.00%	5.00%
Common equity Tier 1 capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 472,615	$ 445,107
For Capital Adequacy Purposes	129,208	125,895
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 186,634	$ 181,848
Common equity Tier 1 capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	16.46%	15.91%
For Capital Adequacy Purposes	4.50%	4.50%
To Be Well-Capitalized Under Prompt Corrective Action Provision	6.50%	6.50%
Tier I capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 472,615	$ 445,107
For Capital Adequacy Purposes	172,278	167,859
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 229,704	$ 223,812
Tier I capital (to risk weighted assets), Ratio [Abstract]
Actual Ratio	16.46%	15.91%
For Capital Adequacy Purposes	6.00%	6.00%
To Be Well-Capitalized Under Prompt Corrective Action Provision	8.00%	8.00%
Total capital (to risk weighted assets), Amount [Abstract]
Actual Amount	$ 508,515	$ 480,099
For Capital Adequacy Purposes	229,708	223,822
To Be Well-Capitalized Under Prompt Corrective Action Provision	$ 287,134	$ 279,778
Total capital (to risk-weighted assets), Ratio [Abstract]
Actual Ratio	17.71%	17.16%
For Capital Adequacy Purposes	8.00%	8.00%
To Be Well-Capitalized Under Prompt Corrective Action Provision	10.00%	10.00%

Parent Company Financial Stat88

Parent Company Financial Statements, Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets [Abstract]
Cash on deposit	$ 48,603	$ 51,974
Goodwill	65,490	65,490
Premises and equipment, net	47,940	48,188
Other assets	36,984	33,827
Total assets	3,932,169	3,903,934
Liabilities and shareholders' equity [Abstract]
Long-term debt	61,341	61,341
Other liabilities	24,244	21,431
Total liabilities	3,431,554	3,428,351
Shareholders' equity	500,615	475,583
Total liabilities and shareholders' equity	3,932,169	3,903,934
Parent Company [Member]
Assets [Abstract]
Cash on deposit	1,525	1,462
Investment in and advances to subsidiaries	556,975	531,702
Goodwill	4,973	4,973
Premises and equipment, net	142	145
Other assets	391	911
Total assets	564,006	539,193
Liabilities and shareholders' equity [Abstract]
Long-term debt	61,341	61,341
Other liabilities	2,050	2,269
Total liabilities	63,391	63,610
Shareholders' equity	500,615	475,583
Total liabilities and shareholders' equity	$ 564,006	$ 539,193

Parent Company Financial Stat89

Parent Company Financial Statements, Condensed Statements of Income and Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Expenses [Abstract]
Interest expense	$ 13,555	$ 11,773	$ 11,797
Other expenses	12,077	11,780	11,980
Income before income taxes and equity in undistributed income of subsidiaries	66,464	64,963	62,397
Income tax benefit	19,118	18,531	19,146
Net income	47,346	46,432	43,251
Unrealized holding gains (losses) on securities available-for-sale [Abstract]
Unrealized holding gains (losses) arising during the period	(4,578)	(342)	13,928
Less: Reclassification adjustments for realized gains (losses) included in net income	522	(106)	(211)
Other comprehensive income (loss), net of tax	(3,315)	(153)	9,190
Comprehensive income	44,031	46,279	52,441
Parent Company [Member]
Income [Abstract]
Dividends from subsidiary banks	20,708	19,808	19,534
Other income	459	414	196
Total income	21,167	20,222	19,730
Expenses [Abstract]
Interest expense	1,417	1,170	1,131
Depreciation expense	107	130	153
Other expenses	2,256	2,465	2,550
Total expenses	3,780	3,765	3,834
Income before income taxes and equity in undistributed income of subsidiaries	17,387	16,457	15,896
Income tax benefit	(1,373)	(1,371)	(1,548)
Income before equity in undistributed income of subsidiaries	18,760	17,828	17,444
Equity in undistributed income of subsidiaries	28,586	28,604	25,807
Net income	47,346	46,432	43,251
Unrealized holding gains (losses) on securities available-for-sale [Abstract]
Unrealized holding gains (losses) arising during the period	(4,578)	(342)	13,928
Less: Reclassification adjustments for realized gains (losses) included in net income	522	(106)	(211)
Tax expense (benefit)	(1,785)	(83)	4,949
Other comprehensive income (loss), net of tax	(3,315)	(153)	9,190
Comprehensive income	$ 44,031	$ 46,279	$ 52,441

Parent Company Financial Stat90

Parent Company Financial Statements, Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities [Abstract]
Net income	$ 47,346	$ 46,432	$ 43,251
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation	3,904	3,932	4,314
Stock-based compensation	458	783	852
Excess tax benefits of stock-based compensation	100	104	760
Changes in [Abstract]
Other assets	(3,205)	(6,274)	(60)
Other liabilities	2,874	(2,488)	(1,339)
Net cash provided by operating activities	61,425	54,979	57,528
Cash flows from investing activities [Abstract]
Purchase of premises and equipment	(3,498)	(2,246)	(2,081)
Net cash used in investing activities	(86,107)	(108,349)	(144,076)
Cash flows from financing activities [Abstract]
Issuance of common stock	2,985	2,082	1,992
Repurchase of common stock	(382)	(189)	0
Excess tax benefits of stock-based compensation	(100)	(104)	(760)
Dividends paid	(22,190)	(21,330)	(20,570)
Net cash provided by (used in) financing activities	(18,213)	135,464	85,424
Net increase (decrease) in cash and cash equivalents	(42,895)	82,094	(1,124)
Cash and cash equivalents at beginning of year	187,611	105,517	106,641
Cash and cash equivalents at end of year	144,716	187,611	105,517
Parent Company [Member]
Cash flows from operating activities [Abstract]
Net income	47,346	46,432	43,251
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation	107	130	153
Equity in undistributed earnings of subsidiaries	(28,586)	(28,604)	(25,807)
Stock-based compensation	458	783	838
Excess tax benefits of stock-based compensation	100	104	760
Changes in [Abstract]
Other assets	519	240	(558)
Other liabilities	(90)	968	563
Net cash provided by operating activities	19,854	20,053	19,200
Cash flows from investing activities [Abstract]
Purchase of premises and equipment	(104)	(45)	(125)
Repayment of investments in and advances to subsidiaries	0	0	(14)
Net cash used in investing activities	(104)	(45)	(139)
Cash flows from financing activities [Abstract]
Issuance of common stock	2,985	2,082	1,992
Repurchase of common stock	(382)	(189)	0
Excess tax benefits of stock-based compensation	(100)	(104)	(760)
Dividends paid	(22,190)	(21,330)	(20,570)
Net cash provided by (used in) financing activities	(19,687)	(19,541)	(19,338)
Net increase (decrease) in cash and cash equivalents	63	467	(277)
Cash and cash equivalents at beginning of year	1,462	995	1,272
Cash and cash equivalents at end of year	$ 1,525	$ 1,462	$ 995

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator [Abstract]
Net income	$ 47,346	$ 46,432	$ 43,251
Basic earnings per share [Abstract]
Weighted average shares (in shares)	17,548,000	17,431,000	17,326,000
Diluted earnings per share [Abstract]
Dilutive effect of equity grants (in shares)	18,000	52,000	71,000
Adjusted weighted average shares (in shares)	17,566,000	17,483,000	17,397,000
Earnings per share [Abstract]
Basic earnings per share (in dollars per share)	$ 2.70	$ 2.66	$ 2.50
Diluted earnings per share (in dollars per share)	$ 2.70	$ 2.66	$ 2.49
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options excluded from diluted calculations (in shares)	0	58,063	0

Accumulated Other Comprehensi92

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains (losses)	$ 522	$ (106)	$ (211)
Tax expense (benefit)	19,118	18,531	19,146
Net income	47,346	46,432	43,251
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 (losses)	522	(106)	(211)
Tax expense (benefit)	183	(37)	(74)
Net income	$ 339	$ (69)	$ (137)