Nicolet Bankshares (NIC) 10-Q 27 Apr 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 24, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	NICOLET BANKSHARES INC
Entity Central Index Key	1,174,850
Trading Symbol	ncbs
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		9,643,374
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018		Dec. 31, 2017
Assets
Cash and due from banks	$ 51,523		$ 86,191
Interest-earning deposits	380,755		68,008
Federal funds sold	737		734
Cash and cash equivalents	433,015	[1]	154,933
Certificates of deposit in other banks	1,248		1,746
Securities available for sale ("AFS"), at fair value	401,130		405,153
Other investments	17,431		14,837
Loans held for sale	7,880		4,666
Loans	2,100,597		2,087,925
Allowance for loan losses	(12,765)		(12,653)
Loans, net	2,087,832		2,075,272
Premises and equipment, net	46,263		47,151
Bank owned life insurance ("BOLI")	64,895		64,453
Goodwill and other intangibles, net	127,224		128,406
Accrued interest receivable and other assets	37,017		35,816
Total assets	3,223,935		2,932,433
Liabilities:
Noninterest-bearing demand deposits	899,481		631,831
Interest-bearing deposits	1,865,609		1,839,233
Total deposits	2,765,090		2,471,064
Short-term borrowings	0		0
Long-term borrowings	77,112		78,046
Accrued interest payable and other liabilities	17,082		18,444
Total liabilities	2,859,284		2,567,554
Stockholders' Equity:
Common stock	97		98
Additional paid-in capital	257,470		263,835
Retained earnings	112,905		102,391
Accumulated other comprehensive loss	(6,484)		(2,146)
Total Nicolet Bankshares, Inc. stockholders' equity	363,988		364,178
Noncontrolling interest	663		701
Total stockholders' equity and noncontrolling interest	364,651		364,879
Total liabilities, noncontrolling interest and stockholders' equity	$ 3,223,935		$ 2,932,433
Preferred shares authorized (no par value)	10,000,000		10,000,000
Preferred shares issued and outstanding
Common shares authorized (par value $0.01 per share)	30,000,000		30,000,000
Common shares outstanding	9,698,997		9,818,247
Common shares issued	9,726,783		9,849,167
[1]	Cash and cash equivalents include restricted cash of $7.5 million and $0 million at March 31, 2018 and 2017, respectively, for the reserve balance required with the Federal Reserve Bank.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred shares authorized, no par value (in dollars per share)	$ 0	$ 0
Common shares authorized, par value (in dollars per share)	$ 0.01	$ 0.01

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Interest income:
Loans, including loan fees		$ 28,454	$ 21,095
Investment securities:
Taxable		1,342	1,069
Tax-exempt		588	565
Other interest income		401	354
Total interest income		30,785	23,083
Interest expense:
Deposits		3,089	1,187
Short-term borrowings		3	21
Long-term borrowings		819	558
Total interest expense		3,911	1,766
Net interest income		26,874	21,317
Provision for loan losses		510	450
Net interest income after provision for loan losses		26,364	20,867
Noninterest income:
Service charges on deposit accounts		1,190	1,008
Mortgage income, net		1,080	842
Trust services fee income		1,606	1,467
Brokerage fee income		1,604	1,259
Card interchange income		1,243	980
BOLI income		442	401
Rent income		308	272
Gain (loss) on sale, disposal or write-down of assets, net		204	(6)
Other income		1,147	546
Total noninterest income		8,824	6,769
Noninterest expense:
Personnel		12,492	9,933
Occupancy, equipment and office		3,787	2,831
Business development and marketing		1,342	929
Data processing		2,320	1,983
FDIC assessments		273	232
Intangibles amortization		1,182	1,163
Other expense		1,246	1,252
Total noninterest expense		22,642	18,323
Income before income tax expense		12,546	9,313
Income tax expense		2,908	3,032
Net income		9,638	6,281
Less: Net income attributable to noncontrolling interest		61	73
Net income attributable to Nicolet Bankshares, Inc.		$ 9,577	$ 6,208
Earnings per common share:
Basic (in dollars per share)	[1]	$ 0.98	$ 0.72
Diluted (in dollars per share)	[1]	$ 0.94	$ 0.69
Weighted average common shares outstanding:
Basic (in shares)		9,765,375	8,584,289
Diluted (in shares)		10,224,788	8,958,425
[1]	Cumulative quarterly per share performance may not equal annual per share totals due to the effects of the amount and timing of capital increases. When computing earnings per share for an interim period, the denominator is based on the weighted-average shares outstanding during the interim period, and not on an annualized weighted-average basis. Accordingly, the sum of the quarters' earnings per share data will not necessarily equal the year to date earnings per share data.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 9,638	$ 6,281
Unrealized gains (losses) on securities AFS:
Net unrealized holding gains (losses) arising during the period	(4,658)	2,870
Income tax (expense) benefit	1,257	(1,120)
Total other comprehensive income (loss)	(3,401)	1,750
Comprehensive income	$ 6,237	$ 8,031

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Total
Balance at Dec. 31, 2017	$ 98	$ 263,835	$ 102,391	$ (2,146)	$ 701	$ 364,879
Comprehensive income:
Net income			9,577		61	9,638
Other comprehensive loss				(3,401)		(3,401)
Stock compensation expense		1,220				1,220
Exercise of stock options, net		427				427
Issuance of common stock		51				51
Purchase and retirement of common stock	(1)	(8,063)				(8,064)
Distribution from noncontrolling interest					(99)	(99)
Adoption of ASU 2016-01 (See Notes 1 and 5)			937	(937)
Balance at Mar. 31, 2018	$ 97	$ 257,470	$ 112,905	$ (6,484)	$ 663	$ 364,651

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Cash Flows From Operating Activities:
Net income		$ 9,638	$ 6,281
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion		1,741	1,598
Provision for loan losses		510	450
Increase in cash surrender value of life insurance		(442)	(401)
Stock compensation expense		1,220	384
(Gain) loss on sale, disposal or write-down of assets, net		(204)	6
Gain on sale of loans held for sale, net		(905)	(553)
Proceeds from sale of loans held for sale		47,396	39,269
Origination of loans held for sale		(49,808)	(38,857)
Net change in:
Accrued interest receivable and other assets		(985)	(377)
Accrued interest payable and other liabilities		(105)	(904)
Net cash provided by operating activities		8,056	6,896
Cash Flows From Investing Activities:
Net decrease in certificates of deposit in other banks		498	749
Purchases of securities AFS		(15,901)	(48,222)
Proceeds from calls and maturities of securities AFS		11,835	11,133
Proceeds from sales of other investments			5,829
Purchases of other investments		(36)
Net increase in loans		(11,313)	(44,795)
Net (increase) decrease in premises and equipment		(400)	344
Net (increase) decrease in other real estate and other assets		(15)	224
Net cash used by investing activities		(15,332)	(74,738)
Cash Flows From Financing Activities:
Net increase (decrease) in deposits		294,105	(23,715)
Net increase in short-term borrowings			6,000
Repayments of long-term borrowings		(1,062)
Purchase and retirement of common stock		(8,064)	(79)
Proceeds from issuance of common stock, net		478	812
Distribution from noncontrolling interest		(99)
Net cash provided (used) by financing activities		285,358	(16,982)
Net increase (decrease) in cash and cash equivalents		278,082	(84,824)
Cash and cash equivalents:
Beginning		154,933	129,103
Ending	[1]	433,015	44,279
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest		3,956	1,938
Cash paid for taxes		54
Transfer of loans and bank premises to other real estate owned		32	513
Capitalized mortgage servicing rights		$ 103	185
Transfer of loans from held for sale to held for investment			$ 3,236
[1]	Cash and cash equivalents include restricted cash of $7.5 million and $0 million at March 31, 2018 and 2017, respectively, for the reserve balance required with the Federal Reserve Bank.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Note 1 – Basis of Presentation General In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the consolidated balance sheets, statements of income, comprehensive income, changes in stockholders’ equity and cash flows of Nicolet Bankshares, Inc. (the “Company” or “Nicolet”) and its subsidiaries, for the periods presented, and all such adjustments are of a normal recurring nature. All material intercompany transactions and balances are eliminated. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the entire year. These interim consolidated financial statements have been prepared according to the rules and regulations of the Securities and Exchange Commission and, therefore, certain information and footnote disclosures normally presented in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) have been omitted or abbreviated. These consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. Critical Accounting Policies and Estimates Preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions the Company may undertake in the future. Estimates are used in accounting for, among other items, the allowance for loan losses, valuation of loans in acquisition transactions, useful lives for depreciation and amortization, fair value of financial instruments, other-than-temporary impairment calculations, valuation of deferred tax assets, uncertain income tax positions and contingencies. Estimates that are particularly susceptible to significant change for the Company include the determination of the allowance for loan losses, the determination and assessment of deferred tax assets and liabilities, and the valuation of loans acquired in acquisition transactions; therefore, these are critical accounting policies. Factors that may cause sensitivity to the aforementioned estimates include but are not limited to: external market factors such as market interest rates and employment rates, changes to operating policies and procedures, changes in applicable banking or tax regulations, and changes to deferred tax estimates. Actual results may ultimately differ from estimates, although management does not generally believe such differences would materially affect the consolidated financial statements in any individual reporting period presented. There have been no material changes or developments with respect to the assumptions or methodologies that the Company uses when applying what management believes are critical accounting policies and developing critical accounting estimates as disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. Recent Accounting Developments Adopted In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, Compensation – Stock Compensation (Topic 718) In January 2017, the FASB issued ASU 2017-01 to clarify the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets versus businesses. The update narrows the definition of a business by adding three principal clarifications (1) if substantially all the fair value of the gross assets in the asset group is concentrated in either a single identifiable asset or group of similar identifiable assets the transaction does not involve a business, (2) if the asset group does not include a minimum of an input and a substantive process, it does not represent a business, and (3) if the integrated set of activities (including its inputs and processes) does not create, or have the ability to create, goods or services to customers, investment income (e.g., dividends or interest) or other revenue, it is not a business. The overall intention is to provide consistency in applying the guidance and make the definition of a business more operable. This update is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years and should be applied prospectively. The Company adopted the updated guidance effective January 1, 2018 with no material impact on its consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). Operating Segment While the chief decision makers monitor the revenue streams of the various products and services, and evaluate costs, balance sheet positions and quality, all such products, services and activities are directly or indirectly related to the business of community banking, with no regular, formal or material segment delineations. Operations are managed and financial performance is evaluated on a company-wide basis, and accordingly, all the financial service operations are considered by management to be aggregated in one reportable operating segment. Reclassifications Certain amounts in the 2017 consolidated financial statements have been reclassified to conform to the 2018 presentation.

Acquisition

Acquisition	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Acquisition	Note 2 – Acquisition On April 28, 2017, the Company consummated its merger with First Menasha Bancshares, Inc. (“First Menasha”) pursuant to the Agreement and Plan of Merger by and between the Company and First Menasha dated November 3, 2016, (the “Merger Agreement”), whereby First Menasha was merged with and into the Company, and The First National Bank-Fox Valley, the wholly owned commercial bank subsidiary of First Menasha serving the Fox Valley area of Wisconsin, was merged with and into Nicolet National Bank (the “Bank”). The system integration was completed, and five branches of First Menasha opened on May 1, 2017, as Nicolet National Bank branches, expanding its presence in Calumet and Winnebago Counties, Wisconsin. The Company closed one of its Calumet County locations concurrently with the First Menasha merger. The purpose of the merger was to continue Nicolet’s interest in strategic growth, consistent with its plan to improve profitability through efficiency, leverage the strengths of each bank across the combined customer base, and add shareholder value. With the merger, Nicolet became the leading community bank to serve the Fox Valley area of Wisconsin. Pursuant to the Merger Agreement, the final purchase price consisted of issuing 1,309,885 shares of the Company’s common stock (given the final stock-for-stock exchange ratio of 3.126 except for First Menasha shares owned by the Company immediately prior to the time of the merger), for common stock consideration of $62.2 million (based on $47.52 per share, the volume weighted average closing price of the Company’s common stock over the preceding 20 trading day period) plus cash consideration of $19.3 million. Approximately $0.2 million in direct stock issuance costs for the merger were incurred and charged against additional paid-in capital. Upon consummation, the Company added $480 million in assets, $351 million in loans, $375 million in deposits, $4 million in core deposit intangible, and $41 million of goodwill. The Company accounted for the transaction under the acquisition method of accounting, and thus, the financial position and results of operations of First Menasha prior to the consummation date were not included in the accompanying consolidated financial statements. The accounting required assets purchased and liabilities assumed to be recorded at their respective estimated fair values at the date of acquisition.

Earnings per Common Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings per Common Share	Note 3 – Earnings per Common Share Basic earnings per common share are calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share are calculated by dividing net income available to common shareholders by the weighted average number of shares adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock), if any. Presented below are the calculations for basic and diluted earnings per common share. Three Months Ended (In thousands except per share data) 2018 2017 Net income attributable to Nicolet Bankshares, Inc. $ 9,577 $ 6,208 Weighted average common shares outstanding 9,765 8,584 Effect of dilutive common stock awards 460 374 Diluted weighted average common shares outstanding 10,225 8,958 Basic earnings per common share* $ 0.98 $ 0.72 Diluted earnings per common share* $ 0.94 $ 0.69 *Cumulative quarterly per share performance may not equal annual per share totals due to the effects of the amount and timing of capital increases. When computing earnings per share for an interim period, the denominator is based on the weighted-average shares outstanding during the interim period, and not on an annualized weighted-average basis. Accordingly, the sum of the quarters' earnings per share data will not necessarily equal the year to date earnings per share data. For the three months ended March 31, 2018, options to purchase approximately 0.1 million shares are excluded from the calculation of diluted earnings per common share as the effect of their exercise would have been anti-dilutive. There was no anti-dilutive effect of options outstanding at March 31, 2017.

Stock-based Compensation

Stock-based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	Note 4 – Stock-based Compensation The Company may grant stock options and restricted stock under its stock-based compensation plans to certain officers, employees and directors. A Black-Scholes model is utilized to estimate the fair value of stock option grants, while the market price of the Company’s stock at the date of grant is used to estimate the value of restricted stock awards. The weighted average assumptions used in the Black-Scholes model for valuing stock option grants for the three months ended March 31, 2018 were as follows. There were no stock options granted during the three months ended March 31, 2017. Three Months Ended Dividend yield 0 % Expected volatility 25 % Risk-free interest rate 2.48 % Expected average life 7 years Weighted average per share fair value of options $ 17.60 Activity in the Company’s Stock Incentive Plans is summarized in the following tables: Stock Options Option Shares Weighted Weighted Aggregate Outstanding – December 31, 2017 1,643,255 $ 39.82 Granted 10,000 54.06 Exercise of stock options * (19,796 ) 21.61 Forfeited (3,500 ) 42.32 Outstanding – March 31, 2018 1,629,959 $ 40.12 7.9 $ 24,569 Exercisable – March 31, 2018 380,909 $ 23.63 5.3 $ 11,674 * The terms of the stock option agreements permit having a number of shares of stock withheld, the fair market value of which as of the date of exercise is sufficient to satisfy the exercise price and/or tax withholding requirements, and accordingly no share were surrendered to the Company for the three months ended March 31, 2018. Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock options. The intrinsic value of options exercised for the three months ended March 31, 2018 and 2017 was approximately $0.7 million and $1.2 million, respectively. Restricted Stock Weighted- Restricted Outstanding – December 31, 2017 $ 34.26 30,920 Granted 56.01 3,000 Vested * 31.45 (6,134 ) Forfeited - - Outstanding – March 31, 2018 $ 37.24 27,786 * The terms of the restricted stock agreements permit the surrender of shares to the Company upon vesting in order to satisfy applicable tax withholding requirements at the minimum statutory withholding rate, and accordingly, 1,492 shares were surrendered during the three months ended March 31, 2018. The Company recognized approximately $1.2 million and $384,000 of stock-based compensation expense during the three months ended March 31, 2018 and 2017, respectively, associated with its common stock awards. As of March 31, 2018, there was approximately $15.8 million of unrecognized compensation cost related to equity award grants. The cost is expected to be recognized over the remaining vesting period of approximately four years. The Company recognized a tax benefit of approximately $0.2 million and $0.1 million for the three months ended March 31, 2018 and 2017, respectively, for the tax impact of stock option exercises and vesting of restricted stock.

Securities Available for Sale

Securities Available for Sale	3 Months Ended
	Mar. 31, 2018
Available-for-sale Securities [Abstract]
Securities Available for Sale	Note 5 - Securities Available for Sale Amortized costs and fair values of securities available for sale are summarized as follows: March 31, 2018 (in thousands) Amortized Cost Gross Gross Fair Value U.S. government agency securities $ 26,707 $ - $ 522 $ 26,185 State, county and municipals 179,951 75 4,117 175,909 Mortgage-backed securities 155,040 106 4,023 151,123 Corporate debt securities 48,314 210 611 47,913 Total $ 410,012 $ 391 $ 9,273 $ 401,130 December 31, 2017 (in thousands) Amortized Cost Gross Gross Fair Value U.S. government agency securities $ 26,586 $ - $ 377 $ 26,209 State, county and municipals 186,128 180 2,264 184,044 Mortgage-backed securities 157,705 160 2,333 155,532 Corporate debt securities 36,387 449 39 36,797 Equity securities * 1,287 1,284 - 2,571 Total $ 408,093 $ 2,073 $ 5,013 $ 405,153 * Effective January 1, 2018, the Company adopted ASU 2016-01, which requires equity securities with readily determinable fair values to be measured at fair value with changes in the fair value recognized through net income. Such securities are no longer reflected as securities AFS. As a result of this accounting change, in the first quarter of 2018 the Company recognized a cumulative-effect adjustment from accumulated other comprehensive income to retained earnings of approximately $0.9 million in the consolidated statement of stockholders’ equity for the net of tax impact of the unrealized gain on equity securities as of the date of adoption and recognized a loss of $25,000 in the consolidated statements of income for the change in fair value on equity securities since adoption. In addition, the approximately $2.5 million current fair value of equity securities is now reflected within other investments on the consolidated balance sheets rather than as securities AFS. Prior periods have not been restated for the impact of this accounting change. See Note 1 for additional information on this new accounting standard. The following table represents gross unrealized losses and the related estimated fair value of investment securities available for sale, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position. March 31, 2018 Less than 12 months 12 months or more Total ($ in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Number of U.S. government agency securities $ 10,364 $ 162 $ 15,821 $ 360 $ 26,185 $ 522 2 State, county and municipals 110,719 2,137 48,123 1,980 158,842 4,117 468 Mortgage-backed securities 73,606 1,522 65,367 2,501 138,973 4,023 228 Corporate debt securities 31,632 611 - - 31,632 611 16 Total $ 226,321 $ 4,432 $ 129,311 $ 4,841 $ 355,632 $ 9,273 714 December 31, 2017 Less than 12 months 12 months or more Total ($ in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Number of U.S. government agency securities $ 26,209 $ 377 $ - $ - $ 26,209 $ 377 2 State, county and municipals 110,157 1,097 49,326 1,167 159,483 2,264 465 Mortgage-backed securities 72,210 735 65,537 1,598 137,747 2,333 215 Corporate debt securities 10,172 39 - - 10,172 39 5 Total $ 218,748 $ 2,248 $ 114,863 $ 2,765 $ 333,611 $ 5,013 687 As of March 31, 2018, the Company does not consider its securities AFS with unrealized losses to be other-than-temporarily impaired, as the unrealized losses in each category have occurred as a result of changes in interest rates, market spreads and market conditions subsequent to purchase, not credit deterioration. The Company has the ability and intent to hold its securities to maturity. There were no other-than-temporary impairments charged to earnings during the three-month periods ended March 31, 2018 or 2017. The amortized cost and fair values of securities AFS by contractual maturity at March 31, 2018 are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties; as this is particularly inherent in mortgage-backed securities, these securities are not included in the maturity categories below. March 31, 2018 (in thousands) Amortized Cost Fair Value Due in less than one year $ 17,307 $ 17,278 Due in one year through five years 128,152 126,324 Due after five years through ten years 102,246 98,947 Due after ten years 7,267 7,458 254,972 250,007 Mortgage-backed securities 155,040 151,123 Securities available for sale $ 410,012 $ 401,130 There were no sales of securities during the three-month periods ended March 31, 2018 or 2017.

Loans, Allowance for Loan Losse

Loans, Allowance for Loan Losses, and Credit Quality	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans, Allowance for Loan Losses, and Credit Quality	Note 6 – Loans, Allowance for Loan Losses, and Credit Quality The loan composition as of March 31, 2018 and December 31, 2017 is summarized as follows. Total March 31, 2018 December 31, 2017 (in thousands) Amount % of Amount % of Commercial & industrial $ 650,197 31.0 % $ 637,337 30.5 % Owner-occupied commercial real estate (“CRE”) 437,672 20.8 430,043 20.6 Agricultural (“AG”) production 33,741 1.6 35,455 1.7 AG real estate 53,412 2.5 51,778 2.5 CRE investment 323,048 15.4 314,463 15.1 Construction & land development 77,708 3.7 89,660 4.3 Residential construction 31,075 1.5 36,995 1.8 Residential first mortgage 365,318 17.4 363,352 17.4 Residential junior mortgage 105,903 5.0 106,027 5.1 Retail & other 22,523 1.1 22,815 1.0 Loans $ 2,100,597 100.0 % $ 2,087,925 100.0 % Less allowance for loan losses 12,765 12,653 Loans, net $ 2,087,832 $ 2,075,272 Allowance for loan losses to loans 0.61 % 0.61 % March 31, 2018 December 31, 2017 (in thousands) Originated % of Acquired % of Originated % of Acquired % of Commercial & industrial $ 507,460 39.2 % $ 142,737 17.7 % $ 488,600 39.3 % $ 148,737 17.6 % Owner-occupied CRE 247,049 19.1 190,623 23.7 237,548 19.1 192,495 22.8 AG production 10,515 0.8 23,226 2.9 11,102 0.9 24,353 2.9 AG real estate 30,014 2.3 23,398 2.9 27,831 2.2 23,947 2.8 CRE investment 131,426 10.2 191,622 23.8 113,862 9.2 200,601 23.8 Construction & land development 50,348 3.9 27,360 3.4 56,061 4.5 33,599 4.0 Residential construction 29,104 2.2 1,971 0.2 33,615 2.7 3,380 0.4 Residential first mortgage 202,567 15.7 162,751 20.2 191,186 15.4 172,166 20.4 Residential junior mortgage 67,654 5.2 38,249 4.7 65,643 5.3 40,384 4.8 Retail & other 18,611 1.4 3,912 0.5 18,254 1.4 4,561 0.5 Loans 1,294,748 100.0 % 805,849 100.0 % 1,243,702 100.0 % 844,223 100.0 % Less ALLL 10,699 2,066 10,542 2,111 Loans, net $ 1,284,049 $ 803,783 $ 1,233,160 $ 842,112 ALLL to loans 0.83 % 0.26 % 0.85 % 0.25 % A roll forward of the allowance for loan losses for the three months ended March 31, 2018 and 2017, and the year ended December 31, 2017, respectively, is summarized as follows. Three Months Ended Year Ended (in thousands) March 31, 2018 March 31, 2017 December 31, 2017 Beginning balance $ 12,653 $ 11,820 $ 11,820 Provision for loan losses 510 450 2,325 Charge-offs (430 ) (111 ) (1,604 ) Recoveries 32 30 112 Net charge-offs (398 ) (81 ) (1,492 ) Ending balance $ 12,765 $ 12,189 $ 12,653 Practically all of the Company’s loans, commitments, and letters of credit have been granted to customers in the Company’s market area. Although the Company has a diversified loan portfolio, the credit risk in the loan portfolio is largely influenced by general economic conditions and trends of the counties and markets in which the debtors operate, and the resulting impact on the operations of borrowers or on the value of underlying collateral, if any. The following tables present the balance and activity in the ALLL by portfolio segment and the recorded investment in loans by portfolio segment at or for the three months ended March 31, 2018: TOTAL – Three Months Ended March 31, 2018 (in thou sands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL: Beginning balance $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 Provision 545 34 (8 ) 16 133 (232 ) (39 ) 19 (31 ) 73 510 Charge-offs (343 ) (31 ) - - - - - - - (56 ) (430 ) Recoveries 1 1 - - - - - - 28 2 32 Net charge-offs (342 ) (30 ) - - - - - - 28 (54 ) (398 ) Ending balance $ 5,137 $ 2,611 $ 121 $ 312 $ 1,521 $ 494 $ 212 $ 1,628 $ 485 $ 244 $ 12,765 As percent of ALLL 40.2 % 20.5 % 0.9 % 2.4 % 11.9 % 3.9 % 1.7 % 12.8 % 3.8 % 1.9 % 100.0 % ALLL: Individually evaluated $ 115 $ - $ - $ - $ 35 $ - $ - $ - $ - $ - $ 150 Collectively evaluated 5,022 2,611 121 312 1,486 494 212 1,628 485 244 12,615 Ending balance $ 5,137 $ 2,611 $ 121 $ 312 $ 1,521 $ 494 $ 212 $ 1,628 $ 485 $ 244 $ 12,765 Loans: Individually evaluated $ 6,273 $ 1,886 $ - $ 235 $ 2,798 $ 1,049 $ 80 $ 3,060 $ 87 $ 12 $ 15,480 Collectively evaluated 643,924 435,786 33,741 53,177 320,250 76,659 30,995 362,258 105,816 22,511 2,085,117 Total loans $ 650,197 $ 437,672 $ 33,741 $ 53,412 $ 323,048 $ 77,708 $ 31,075 $ 365,318 $ 105,903 $ 22,523 $ 2,100,597 Less ALLL $ 5,137 $ 2,611 $ 121 $ 312 $ 1,521 $ 494 $ 212 $ 1,628 $ 485 $ 244 $ 12,765 Net loans $ 645,060 $ 435,061 $ 33,620 $ 53,100 $ 321,527 $ 77,214 $ 30,863 $ 363,690 $ 105,418 $ 22,279 $ 2,087,832 As a further breakdown, the March 31, 2018 ALLL is summarized by originated and acquired as follows: Originated – Three Months Ended March 31, 2018 (in thousands) Commercial Owner- AG AG real CRE Construction & Residential Residential Residential Retail & Total ALLL: Beginning balance $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 Provision 565 47 (6 ) 16 116 (216 ) (30 ) 20 (28 ) 73 557 Charge-offs (343 ) (31 ) - - - - - - - (56 ) (430 ) Recoveries - - - - - - - - 28 2 30 Net charge-offs (343 ) (31 ) - - - - - - 28 (54 ) (400 ) Ending balance $ 4,414 $ 2,131 $ 106 $ 251 $ 1,270 $ 412 $ 170 $ 1,317 $ 409 $ 219 $ 10,699 As percent of ALLL 41.3 % 19.9 % 1.0 % 2.3 % 11.9 % 3.9 % 1.6 % 12.3 % 3.8 % 2.0 100.0 % ALLL: Individually evaluated $ 115 $ - $ - $ - $ 35 $ - $ - $ - $ - $ - $ 150 Collectively evaluated 4,299 2,131 106 251 1,235 412 170 1,317 409 219 10,549 Ending balance $ 4,414 $ 2,131 $ 106 $ 251 $ 1,270 $ 412 $ 170 $ 1,317 $ 409 $ 219 $ 10,699 Loans: Individually evaluated $ 2,686 $ 343 $ - $ - $ 1,522 $ - $ - $ 511 $ - $ - $ 5,062 Collectively evaluated 504,774 246,706 10,515 30,014 129,904 50,348 29,104 202,056 67,654 18,611 1,289,686 Total loans $ 507,460 $ 247,049 $ 10,515 $ 30,014 $ 131,426 $ 50,348 $ 29,104 $ 202,567 $ 67,654 $ 18,611 $ 1,294,748 Less ALLL $ 4,414 $ 2,131 $ 106 $ 251 $ 1,270 $ 412 $ 170 $ 1,317 $ 409 $ 219 $ 10,699 Net loans $ 503,046 $ 244,918 $ 10,409 $ 29,763 $ 130,156 $ 49,936 $ 28,934 $ 201,250 $ 67,245 $ 18,392 $ 1,284,049 Acquired – Three Months Ended March 31, 2018 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL: Beginning balance $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 Provision (20 ) (13 ) (2 ) - 17 (16 ) (9 ) (1 ) (3 ) - (47 ) Charge-offs - - - - - - - - - - - Recoveries 1 1 - - - - - - - - 2 Net charge-offs 1 1 - - - - - - - - 2 Ending balance $ 723 $ 480 $ 15 $ 61 $ 251 $ 82 $ 42 $ 311 $ 76 $ 25 $ 2,066 As percent of ALLL 35.0 % 23.2 % 0.7 % 3.0 % 12.1 % 4.0 % 2.0 % 15.1 % 3.7 % 1.2 % 100.0 % ALLL: Individually evaluated $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - Collectively evaluated 723 480 15 61 251 82 42 311 76 25 2,066 Ending balance $ 723 $ 480 $ 15 $ 61 $ 251 $ 82 $ 42 $ 311 $ 76 $ 25 $ 2,066 Loans: Individually evaluated $ 3,587 $ 1,543 $ - $ 235 $ 1,276 $ 1,049 $ 80 $ 2,549 $ 87 $ 12 $ 10,418 Collectively evaluated 139,150 189,080 23,226 23,163 190,346 26,311 1,891 160,202 38,162 3,900 795,431 Total loans $ 142,737 $ 190,623 $ 23,226 $ 23,398 $ 191,622 $ 27,360 $ 1,971 $ 162,751 $ 38,249 $ 3,912 $ 805,849 Less ALLL $ 723 $ 480 $ 15 $ 61 $ 251 $ 82 $ 42 $ 311 $ 76 $ 25 $ 2,066 Net loans $ 142,014 $ 190,143 $ 23,211 $ 23,337 $ 191,371 $ 27,278 $ 1,929 $ 162,440 $ 38,173 $ 3,887 $ 803,783 The following tables present the balance and activity in the ALLL by portfolio segment and the recorded investment in loans by portfolio segment at or for the year ended December 31, 2017: TOTAL – Year Ended December 31, 2017 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL Beginning balance $ 3,919 $ 2,867 $ 150 $ 285 $ 1,124 $ 774 $ 304 $ 1,784 $ 461 $ 152 $ 11,820 Provision 2,419 (290 ) (21 ) 11 263 (35 ) (53 ) (192 ) 96 127 2,325 Charge-offs (1,442 ) - - - - (13 ) - (8 ) (72 ) (69 ) (1,604 ) Recoveries 38 30 - - 1 - - 25 3 15 112 Net charge-offs (1,404 ) 30 - - 1 (13 ) - 17 (69 ) (54 ) (1,492 ) Ending balance $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 As percent of ALLL 39.0 % 20.6 % 1.0 % 2.3 % 11.0 % 5.7 % 2.0 % 12.7 % 3.9 % 1.8 % 100.0 % ALLL: Individually evaluated $ 163 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ 163 Collectively evaluated 4,771 2,607 129 296 1,388 726 251 1,609 488 225 12,490 Ending balance $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 Loans: Individually evaluated $ 5,870 $ 1,689 $ - $ 248 $ 5,290 $ 1,053 $ 80 $ 2,801 $ 178 $ 12 $ 17,221 Collectively evaluated 631,467 428,354 35,455 51,530 309,173 88,607 36,915 360,551 105,849 22,803 2,070,704 Total loans $ 637,337 $ 430,043 $ 35,455 $ 51,778 $ 314,463 $ 89,660 $ 36,995 $ 363,352 $ 106,027 $ 22,815 $ 2,087,925 Less ALLL $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 Net loans $ 632,403 $ 427,436 $ 35,326 $ 51,482 $ 313,075 $ 88,934 $ 36,744 $ 361,743 $ 105,539 $ 22,590 $ 2,075,272 As a further breakdown, the December 31, 2017 ALLL is summarized by originated and acquired as follows: Originated – Year Ended December 31, 2017 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL Beginning balance $ 3,150 $ 2,263 $ 122 $ 222 $ 893 $ 656 $ 266 $ 1,372 $ 373 $ 132 $ 9,449 Provision 2,429 (172 ) (10 ) 13 261 (28 ) (66 ) (69 ) 105 122 2,585 Charge-offs (1,388 ) - - - - - - (8 ) (72 ) (69 ) (1,537 ) Recoveries 1 24 - - - - - 2 3 15 45 Net charge-offs (1,387 ) 24 - - - - - (6 ) (69 ) (54 ) (1,492 ) Ending balance $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 As percent of ALLL 39.8 % 20.1 % 1.1 % 2.2 % 10.9 % 6.0 % 1.9 % 12.3 % 3.9 % 1.8 % 100.0 % ALLL: Individually evaluated $ 163 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ 163 Collectively evaluated 4,029 2,115 112 235 1,154 628 200 1,297 409 200 10,379 Ending balance $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 Loans: Individually evaluated $ 2,189 $ - $ - $ - $ 549 $ - $ - $ 253 $ 12 $ - $ 3,003 Collectively evaluated 486,411 237,548 11,102 27,831 113,313 56,061 33,615 190,933 65,631 18,254 1,240,699 Total loans $ 488,600 $ 237,548 $ 11,102 $ 27,831 $ 113,862 $ 56,061 $ 33,615 $ 191,186 $ 65,643 $ 18,254 $ 1,243,702 Less ALLL $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 Net loans $ 484,408 $ 235,433 $ 10,990 $ 27,596 $ 112,708 $ 55,433 $ 33,415 $ 189,889 $ 65,234 $ 18,054 $ 1,233,160 Acquired – Year Ended December 31, 2017 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL Beginning balance $ 769 $ 604 $ 28 $ 63 $ 231 $ 118 $ 38 $ 412 $ 88 $ 20 $ 2,371 Provision (10 ) (118 ) (11 ) (2 ) 2 (7 ) 13 (123 ) (9 ) 5 (260 ) Charge-offs (54 ) - - - - (13 ) - - - - (67 ) Recoveries 37 6 - - 1 - - 23 - - 67 Net charge-offs (17 ) 6 - - 1 (13 ) - 23 - - - Ending balance $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 As percent of ALLL 35.1 % 23.3 % 0.8 % 2.9 % 11.1 % 4.6 % 2.4 % 14.8 % 3.7 % 1.3 % 100.0 % ALLL: Individually evaluated $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - Collectively evaluated 742 492 17 61 234 98 51 312 79 25 2,111 Ending balance $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 Loans: Individually evaluated $ 3,681 $ 1,689 $ - $ 248 $ 4,741 $ 1,053 $ 80 $ 2,548 $ 166 $ 12 $ 14,218 Collectively evaluated 145,056 190,806 24,353 23,699 195,860 32,546 3,300 169,618 40,218 4,549 830,005 Total loans $ 148,737 $ 192,495 $ 24,353 $ 23,947 $ 200,601 $ 33,599 $ 3,380 $ 172,166 $ 40,384 $ 4,561 $ 844,223 Less ALLL $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 Net loans $ 147,995 $ 192,003 $ 24,336 $ 23,886 $ 200,367 $ 33,501 $ 3,329 $ 171,854 $ 40,305 $ 4,536 $ 842,112 The following table presents nonaccrual loans by portfolio segment in total and then as a further breakdown by originated or acquired as of March 31, 2018 and December 31, 2017. Total Nonaccrual Loans (in thousands) March 31, 2018 % of Total December 31, 2017 % of Total Commercial & industrial $ 6,434 55.2 % $ 6,016 46.0 % Owner-occupied CRE 744 6.4 533 4.1 AG production - - - - AG real estate 175 1.5 186 1.4 CRE investment 2,105 18.1 4,531 34.6 Construction & land development - - - - Residential construction 108 0.9 80 0.6 Residential first mortgage 1,883 16.1 1,587 12.1 Residential junior mortgage 212 1.8 158 1.2 Retail & other - - 4 - Nonaccrual loans 11,661 100.0 % 13,095 100.0 % Percent of total loans 0.6 % 0.6 % March 31, 2018 December 31, 2017 (in thousands) Originated % of Acquired % of Originated % of Acquired % of Commercial & industrial $ 2,814 51.7 % $ 3,620 58.3 % $ 2,296 70.0 % $ 3,720 37.9 % Owner-occupied CRE 411 7.5 333 5.4 86 2.6 447 4.6 AG production - - - - - - - - AG real estate - - 175 2.8 - - 186 1.9 CRE investment 1,522 28.0 583 9.3 549 16.8 3,982 40.6 Construction & land development - - - - - - - - Residential construction 28 0.5 80 1.3 - - 80 0.8 Residential first mortgage 672 12.3 1,211 19.5 331 10.1 1,256 12.8 Residential junior mortgage - - 212 3.4 12 0.4 146 1.4 Retail & other - - - - 4 0.1 - - Nonaccrual loans $ 5,447 100.0 % $ 6,214 100.0 % $ 3,278 100.0 % $ 9,817 100.0 % The following tables present past due loans by portfolio segment as of March 31, 2018 and December 31, 2017: March 31, 2018 (in thousands) 30-89 Days Past 90 Days & Current Total Commercial & industrial $ 470 $ 6,434 $ 643,293 $ 650,197 Owner-occupied CRE - 744 436,928 437,672 AG production - - 33,741 33,741 AG real estate - 175 53,237 53,412 CRE investment - 2,105 320,943 323,048 Construction & land development 437 - 77,271 77,708 Residential construction - 108 30,967 31,075 Residential first mortgage 1,258 1,883 362,177 365,318 Residential junior mortgage 72 212 105,619 105,903 Retail & other 127 - 22,396 22,523 Total loans $ 2,364 $ 11,661 $ 2,086,572 $ 2,100,597 Percent of total loans 0.1 % 0.6 % 99.3 % 100.0 % December 31, 2017 (in thousands) 30-89 Days Past 90 Days & Current Total Commercial & industrial $ 211 $ 6,016 $ 631,110 $ 637,337 Owner-occupied CRE 671 533 428,839 430,043 AG production 30 - 35,425 35,455 AG real estate - 186 51,592 51,778 CRE investment - 4,531 309,932 314,463 Construction & land development 76 - 89,584 89,660 Residential construction 587 80 36,328 36,995 Residential first mortgage 1,039 1,587 360,726 363,352 Residential junior mortgage 14 158 105,855 106,027 Retail & other 4 4 22,807 22,815 Total loans $ 2,632 $ 13,095 $ 2,072,198 $ 2,087,925 Percent of total loans 0.1 % 0.6 % 99.3 % 100.0 % A description of the loan risk categories used by the Company follows: Grades 1-4, Pass: Credits exhibit adequate cash flows, appropriate management and financial ratios within industry norms and/or are supported by sufficient collateral. Some credits in these rating categories may require a need for monitoring but elements of concern are not severe enough to warrant an elevated rating. Grade 5, Watch: Credits with this rating are adequately secured and performing but are being monitored due to the presence of various short-term weaknesses which may include unexpected, short-term adverse financial performance, managerial problems, potential impact of a decline in the entire industry or local economy and delinquency issues. Loans to individuals or loans supported by guarantors with marginal net worth or collateral may be included in this rating category. Grade 6, Special Mention: Credits with this rating have potential weaknesses that, without the Company’s attention and correction may result in deterioration of repayment prospects. These assets are considered Criticized Assets. Potential weaknesses may include adverse financial trends for the borrower or industry, repeated lack of compliance with Company requests, increasing debt to net worth, serious management conditions and decreasing cash flow. Grade 7, Substandard: Assets with this rating are characterized by the distinct possibility the Company will sustain some loss if deficiencies are not corrected. All foreclosures, liquidations, and nonaccrual loans are considered to be categorized in this rating, regardless of collateral sufficiency. Grade 8, Doubtful: Assets with this rating exhibit all the weaknesses as one rated Substandard with the added characteristic that such weaknesses make collection or liquidation in full highly questionable. Grade 9, Loss: Assets in this category are considered uncollectible. Pursuing any recovery or salvage value is impractical but does not preclude partial recovery in the future. The following tables present total loans by risk categories as of March 31, 2018 and December 31, 2017: March 31, 2018 (in thousands) Grades 1- 4 Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Total Commercial & industrial $ 610,654 $ 18,692 $ 11,621 $ 9,230 $ - $ - $ 650,197 Owner-occupied CRE 399,911 28,718 4,566 4,477 - - 437,672 AG production 28,348 2,342 1,383 1,668 - - 33,741 AG real estate 45,924 2,645 2,316 2,527 - - 53,412 CRE investment 312,103 7,220 1,215 2,510 - - 323,048 Construction & land development 73,832 3,092 17 767 - - 77,708 Residential construction 30,967 - - 108 - - 31,075 Residential first mortgage 360,169 1,522 672 2,955 - - 365,318 Residential junior mortgage 105,659 17 - 227 - - 105,903 Retail & other 22,523 - - - - - 22,523 Total loans $ 1,990,090 $ 64,248 $ 21,790 $ 24,469 $ - $ - $ 2,100,597 Percent of total 94.7 % 3.1 % 1.0 % 1.2 % - - 100.0 % December 31, 2017 (in thousands) Grades 1- 4 Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Total Commercial & industrial $ 597,854 $ 12,999 $ 16,129 $ 10,355 $ - $ - $ 637,337 Owner-occupied CRE 397,357 23,340 6,442 2,904 - - 430,043 AG production 30,431 4,000 - 1,024 - - 35,455 AG real estate 44,321 4,873 - 2,584 - - 51,778 CRE investment 299,926 8,399 190 5,948 - - 314,463 Construction & land development 86,011 2,758 17 874 - - 89,660 Residential construction 36,915 - - 80 - - 36,995 Residential first mortgage 358,067 1,868 683 2,734 - - 363,352 Residential junior mortgage 105,736 117 - 174 - - 106,027 Retail & other 22,811 - - 4 - - 22,815 Total loans $ 1,979,429 $ 58,354 $ 23,461 $ 26,681 $ - $ - $ 2,087,925 Percent of total 94.8 % 2.8 % 1.1 % 1.3 % - - 100.0 % The following tables present impaired loans as of March 31, 2018 and December 31, 2017. Total Impaired Loans – March 31, 2018 (in thousands) Recorded Unpaid Principal Related Average Interest Income Commercial & industrial $ 6,273 $ 10,457 $ 115 $ 6,535 $ 164 Owner-occupied CRE 1,886 2,397 - 1,908 45 AG production - 9 - - - AG real estate 235 295 - 242 12 CRE investment 2,798 4,142 35 2,811 128 Construction & land development 1,049 1,049 - 1,051 12 Residential construction 80 983 - 80 - Residential first mortgage 3,060 3,847 - 3,062 55 Residential junior mortgage 87 407 - 88 7 Retail & Other 12 14 - 12 - Total $ 15,480 $ 23,600 $ 150 $ 15,789 $ 423 Originated impaired loans $ 5,062 $ 5,062 $ 150 $ 5,283 $ 74 Acquired impaired loans 10,418 18,538 - 10,506 349 Total $ 15,480 $ 23,600 $ 150 $ 15,789 $ 423 Total Impaired Loans – December 31, 2017 (in thousands) Recorded Unpaid Principal Related Average Interest Income Commercial & industrial $ 5,870 $ 10,063 $ 163 $ 6,586 $ 718 Owner-occupied CRE 1,689 2,256 - 1,333 132 AG production - 10 - - - AG real estate 248 307 - 233 26 CRE investment 5,290 8,102 - 5,411 465 Construction & land development 1,053 1,053 - 813 57 Residential construction 80 983 - 91 27 Residential first mortgage 2,801 3,653 - 2,177 180 Residential junior mortgage 178 507 - 154 17 Retail & Other 12 14 - 12 1 Total $ 17,221 $ 26,948 $ 163 $ 16,810 $ 1,623 Originated impaired loans $ 3,003 $ 3,003 $ 163 $ 2,964 $ 241 Acquired impaired loans 14,218 23,945 - 13,846 1,382 Total $ 17,221 $ 26,948 $ 163 $ 16,810 $ 1,623 Total purchased credit impaired loans (in aggregate since the Company’s 2013 acquisitions) were initially recorded at a fair value of $43.6 million on their respective acquisition dates, net of an initial $34.4 million non-accretable mark and a zero accretable mark. At March 31, 2018, $10.4 million of the $43.6 million remain in impaired loans. Non-accretable discount on purchase credit impaired (“PCI”) loans Three Months Ended Year Ended (in thousands) March 31, 2018 March 31, 2017 December 31, 2017 Balance at beginning of period $ 9,471 $ 14,327 $ 14,327 Acquired balance, net - - 8,352 Accretion to loan interest income (1,544 ) (2,160 ) (7,995 ) Transferred to accretable (55 ) - (1,936 ) Disposals of loans - (242 ) (3,277 ) Balance at end of period $ 7,872 $ 11,925 $ 9,471 Troubled Debt Restructurings At March 31, 2018, there were seven loans classified as troubled debt restructurings with a current outstanding balance of $2.1 million and pre-modification balance of $3.4 million. In comparison, at December 31, 2017, there were eight loans classified as troubled debt restructurings with an outstanding balance of $5.6 million and pre-modification balance of $6.9 million. There were no loans classified as troubled debt restructurings during the previous twelve months that subsequently defaulted during the three months ended March 31, 2018. As of March 31, 2018, there were no commitments to lend additional funds to debtors whose terms have been modified in troubled debt restructurings.

Goodwill and Other Intangibles

Goodwill and Other Intangibles and Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles and Mortgage Servicing Rights	Note 7 – Goodwill and Other Intangibles and Mortgage Servicing Rights Management periodically reviews the carrying value of its intangible assets to determine if any impairment has occurred, in which case an impairment charge would be recorded as an expense in the period of impairment, or whether changes in circumstances have occurred that would require a revision to the remaining useful life which would impact expense prospectively. In making such determination, management evaluates whether there are any adverse qualitative factors indicating that an impairment may exist, as well as the performance, on an undiscounted basis, of the underlying operations or assets which give rise to the intangible. The Company’s quarterly assessment indicated no impairment charge on goodwill, core deposit intangibles or customer list intangibles was required for the year ended December 31, 2017 or the three months ended March 31, 2018. Three Months Ended Year Ended (in thousands) March 31, 2018 December 31, 2017 Goodwill $ 107,366 $ 107,366 Core deposit intangibles 15,407 16,477 Customer list intangibles 4,451 4,563 Other intangibles 19,858 21,040 Goodwill and other intangibles, net $ 127,224 $ 128,406 Goodwill Other intangible assets Three Months Ended Year Ended (in thousands) March 31, 2018 December 31, 2017 Core deposit intangibles: Gross carrying amount $ 29,015 $ 29,015 Accumulated amortization (13,608 ) (12,538 ) Net book value $ 15,407 $ 16,477 Additions during the period $ - $ 3,670 Amortization during the period $ 1,070 $ 4,294 Customer list intangibles: Gross carrying amount $ 5,233 $ 5,233 Accumulated amortization (782 ) (670 ) Net book value $ 4,451 $ 4,563 Additions during the period $ - $ 870 Amortization during the period $ 112 $ 401 Mortgage servicing rights Three Months Ended Year Ended (in thousands) March 31, 2018 December 31, 2017 Mortgage servicing rights (MSR) asset: MSR asset at beginning of year $ 3,187 $ 1,922 Capitalized MSR 103 876 MSR asset acquired - 874 Amortization during the period (150 ) (485 ) MSR asset at end of period $ 3,140 $ 3,187 Fair value of MSR asset at end of period $ 4,039 $ 4,097 Residential mortgage loans serviced for others $ 515,263 $ 518,419 Net book value of MSR asset to loans serviced for others 0.61 % 0.61 % The Company periodically evaluates its mortgage servicing rights asset for impairment. At each reporting date, impairment is assessed based on an estimated fair value using estimated prepayment speeds of the underlying mortgage loans serviced and stratifications based on the risk characteristics of the underlying loans serviced (predominantly loan type and note interest rate). No valuation or impairment charge was recorded for the year ended December 31, 2017 or the three months ended March 31, 2018. See Note 9 for additional information on the fair value of the MSR asset. The following table shows the estimated future amortization expense for amortizing intangible assets and the MSR asset. The projections are based on existing asset balances, the current interest rate environment and prepayment speeds as of the March 31, 2018. The actual amortization expense the Company recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements and events or circumstances that indicate the carrying amount of an asset may not be recoverable. (in thousands) Core deposit Customer list MSR asset Year ending December 31, 2018 (remaining nine months) $ 2,845 $ 337 $ 434 2019 3,337 449 578 2020 2,657 449 728 2021 2,167 449 326 2022 1,735 449 326 Thereafter 2,666 2,318 748 Total $ 15,407 $ 4,451 $ 3,140

Short and Long-Term Borrowings

Short and Long-Term Borrowings	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Short and Long-Term Borrowings	Note 8 – Short and Long-Term Borrowings Short-Term Borrowings: The Company did not have any short-term borrowings (borrowing with an original maturity of one year or less) outstanding at March 31, 2018 or December 31, 2017. Long-Term Borrowings: The components of long-term borrowings (borrowing with an original maturity greater than one year) at March 31, 2018 and December 31, 2017 were as follows: (in thousands) March 31, 2018 December 31, 2017 FHLB advances $ 35,445 $ 36,509 Junior subordinated debentures 29,736 29,616 Subordinated notes 11,931 11,921 Total long-term borrowings $ 77,112 $ 78,046 FHLB Advances The following table shows the maturity schedule of the FHLB advances as of March 31, 2018. Maturing in: (in thousands) 2018 (remaining nine months) $ 17 2019 - 2020 10,000 2021 - 2022 25,428 $ 35,445 Junior Subordinated Debentures Junior Subordinated Debentures (in thousands) Maturity Date Par 3/31/2018 Unamortized 3/31/2018 Carrying 12/31/2017 Carrying 2004 Nicolet Bankshares Statutory Trust (1) 7/15/2034 $ 6,186 $ - $ 6,186 $ 6,186 2005 Mid-Wisconsin Financial Services, Inc. (2) 12/15/2035 10,310 (3,521 ) 6,789 6,739 2006 Baylake Corp. (3) 9/30/2036 16,598 (4,297 ) 12,301 12,242 2004 First Menasha Bancshares, Inc. (4) 3/17/2034 5,155 (695 ) 4,460 4,449 Total $ 38,249 $ (8,513 ) $ 29,736 $ 29,616 (1) The interest rate is 8.00% fixed. (2) The debentures, assumed in April 2013 as the result of an acquisition, have a floating rate of the three-month LIBOR plus 1.43%, adjusted quarterly. The interest rates were 3.55% and 3.02% as of March 31, 2018 and December 31, 2017, respectively. (3) The debentures, assumed in April 2016 as a result of an acquisition, have a floating rate of the three-month LIBOR plus 1.35%, adjusted quarterly. The interest rates were 3.66% and 3.04% as of March 31, 2018 and December 31, 2017, respectively. (4) The debentures, assumed in April 2017 as the result of an acquisition, have a floating rate of the three-month LIBOR plus 2.79%, adjusted quarterly. The interest rate was 4.98% and 4.39% as of March 31, 2018 and December 31, 2017, respectively. Subordinated Notes

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 9 - Fair Value Measurements Fair value represents the estimated price at which an orderly transaction to sell an asset or transfer a liability would take place between market participants at the measurement date under current market conditions (i.e., an exit price concept), and is a market-based measurement versus an entity-specific measurement. The Company records and/or discloses financial instruments on a fair value basis. These financial assets and financial liabilities are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability of the assumptions used to determine fair value. These levels are: Level 1 - quoted market prices in active markets for identical assets or liabilities that a company has the ability to access at the measurement date; Level 2 - inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly; Level 3 – significant unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the fair value measurement is based on inputs from different levels, the level within which the entire fair value measurement will be categorized is based on the lowest level input that is significant to the fair value measurement in its entirety; this assessment of the significance of an input requires management judgment. Recurring basis fair value measurements: The following table presents the balances of assets and liabilities measured at fair value on a recurring basis for the periods presented. (in thousands) Fair Value Measurements Using Measured at Fair Value on a Recurring Basis: Total Level 1 Level 2 Level 3 March 31, 2018: U.S. government agency securities $ 26,185 $ - $ 26,185 $ - State, county and municipals 175,909 - 175,778 131 Mortgage-backed securities 151,123 - 151,123 - Corporate debt securities 47,913 - 39,449 8,464 Securities AFS $ 401,130 $ - $ 392,535 $ 8,595 Other investments (equity securities) * $ 2,546 $ 2,546 $ - $ - December 31, 2017: U.S. government agency securities $ 26,209 $ - $ 26,209 $ - State, county and municipals 184,044 - 183,386 658 Mortgage-backed securities 155,532 - 155,529 3 Corporate debt securities 36,797 - 28,307 8,490 Equity securities * 2,571 2,571 - - Securities AFS $ 405,153 $ 2,571 $ 393,431 $ 9,151 * Effective January 1, 2018, the Company adopted ASU 2016-01, which requires equity securities with readily determinable fair values to be measured at fair value with changes in the fair value recognized through net income. In addition, the approximately $2.5 million current fair value of equity securities is now reflected within other investments on the consolidated balance sheets compared to securities AFS at December 31, 2017. Prior periods have not been restated for the impact of this accounting change. See Note 1 for additional information on this new accounting standard and see Note 5 for additional information on the impact to securities AFS. The following is a description of the valuation methodologies used by the Company for the securities AFS and equity securities measured at fair value on a recurring basis, as noted in the tables above. Where quoted market prices on securities exchanges are available, the investment is classified as Level 1. Level 1 investments primarily include exchange-traded equity securities. If quoted market prices are not available, fair value is generally determined using prices obtained from independent pricing vendors who use pricing models (with typical inputs including benchmark yields, reported trades for similar securities, issuer spreads or relationship to other benchmark quoted securities), or discounted cash flows, and are classified as Level 2. Examples of these investments include U.S. government agency securities, mortgage-backed securities, obligations of state, county and municipals, and certain corporate debt securities. Finally, in certain cases where there is limited activity or less transparency around inputs to the estimated fair value, investments are classified within Level 3 of the hierarchy. Examples of these include private municipal bonds and corporate debt securities, which include trust preferred security investments. At March 31, 2018 and December 31, 2017, it was determined that carrying value was the best approximation of fair value for these Level 3 securities, based primarily on the internal analysis on these securities. The following table presents the changes in the Level 3 securities AFS measured at fair value on a recurring basis: (in thousands) Three Months Ended Year Ended Level 3 Fair Value Measurements: March 31, 2018 December 31, 2017 Balance at beginning of year $ 9,151 $ 9,108 Acquired balance - 189 Paydowns/Sales/Settlements (556 ) (146 ) Balance at end of period $ 8,595 $ 9,151 Nonrecurring basis fair value measurements: The following table presents the Company’s assets measured at fair value on a nonrecurring basis for the periods presented, aggregated by level in the fair value hierarchy within which those measurements fall. Fair Value Measurements Using Measured at Fair Value on a Nonrecurring Basis: Total Level 1 Level 2 Level 3 (in thousands) March 31, 2018: Impaired loans $ 15,330 $ - $ - $ 15,330 Other real estate owned (“OREO”) 1,367 - - 1,367 MSR asset 3,140 - - 3,140 December 31, 2017: Impaired loans $ 17,058 $ - $ - $ 17,058 OREO 1,294 - - 1,294 MSR asset 3,187 - - 3,187 The following is a description of the valuation methodologies used by the Company for the items noted in the table above. For individually evaluated impaired loans, the amount of impairment is based upon the present value of expected future cash flows discounted at the loan’s effective interest rate, the estimated fair value of the underlying collateral for collateral-dependent loans, or the estimated liquidity of the note. For OREO, the fair value is based upon the estimated fair value of the underlying collateral adjusted for the expected costs to sell. To estimate the fair value of the MSR asset, the underlying serviced loan pools are stratified by interest rate tranche and term of the loan, and a valuation model is used to calculate the present value of the expected future cash flows for each stratum. Financial instruments: The carrying amounts and estimated fair values of the Company’s financial instruments are shown below. March 31, 2018 (in thousands) Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 433,015 $ 433,015 $ 433,015 $ - $ - Certificates of deposit in other banks 1,248 1,234 - 1,234 - Securities AFS 401,130 401,130 - 392,535 8,595 Other investments, including equity securities 17,431 17,431 2,546 13,177 1,708 Loans held for sale 7,880 7,920 - 7,920 - Loans, net 2,087,832 2,082,372 - - 2,082,372 BOLI 64,895 64,895 64,895 - - MSR asset 3,140 4,039 - - 4,039 Financial liabilities: Deposits $ 2,765,090 $ 2,763,061 $ - $ - $ 2,763,061 FHLB advances 35,445 35,447 - 35,447 - Junior subordinated debentures 29,736 29,141 - - 29,141 Subordinated notes 11,931 11,504 - - 11,504 December 31, 2017 (in thousands) Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 154,933 $ 154,933 $ 154,933 $ - $ - Certificates of deposit in other banks 1,746 1,746 - 1,746 - Securities AFS 405,153 405,153 2,571 393,431 9,151 Other investments 14,837 14,837 - 13,142 1,695 Loans held for sale 4,666 4,750 - 4,750 - Loans, net 2,075,272 2,068,382 - - 2,068,382 BOLI 64,453 64,453 64,453 - - MSR asset 3,187 4,097 - - 4,097 Financial liabilities: Deposits $ 2,471,064 $ 2,469,456 $ - $ - $ 2,469,456 FHLB advances 36,509 36,510 - 36,510 - Junior subordinated debentures 29,616 29,024 - - 29,024 Subordinated notes 11,921 11,495 - - 11,495 Not all the financial instruments listed in the table above are subject to the disclosure provisions of ASC 820, as certain assets and liabilities result in their carrying value approximating fair value. These include cash and cash equivalents, bank owned life insurance, short-term borrowings, and nonmaturing deposits. For those financial instruments not previously disclosed the following is a description of the valuation methodologies used. Certificates of deposits in other banks: Other investments: Loans held for sale: Loans, net MSR asset: Deposits FHLB advances Junior subordinated debentures and subordinated notes Lending-related commitments Limitations

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue Recognition [Abstract]
Revenue Recognition	Note 10 – Revenue Recognition As of January 1, 2018, the Company adopted ASU 2014-09 using the modified retrospective approach. The adoption of the guidance had no material impact on the measurement or recognition of revenue; however, additional disclosures have been added in accordance with the ASU. See Note 1 for additional information on this new accounting standard. The main types of revenue contracts are: Service charges on deposit accounts Trust services and brokerage fee income Card interchange income Other noninterest income

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
General	General In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the consolidated balance sheets, statements of income, comprehensive income, changes in stockholders’ equity and cash flows of Nicolet Bankshares, Inc. (the “Company” or “Nicolet”) and its subsidiaries, for the periods presented, and all such adjustments are of a normal recurring nature. All material intercompany transactions and balances are eliminated. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the entire year. These interim consolidated financial statements have been prepared according to the rules and regulations of the Securities and Exchange Commission and, therefore, certain information and footnote disclosures normally presented in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) have been omitted or abbreviated. These consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.
Critical Accounting Policies and Estimates	Critical Accounting Policies and Estimates Preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions the Company may undertake in the future. Estimates are used in accounting for, among other items, the allowance for loan losses, valuation of loans in acquisition transactions, useful lives for depreciation and amortization, fair value of financial instruments, other-than-temporary impairment calculations, valuation of deferred tax assets, uncertain income tax positions and contingencies. Estimates that are particularly susceptible to significant change for the Company include the determination of the allowance for loan losses, the determination and assessment of deferred tax assets and liabilities, and the valuation of loans acquired in acquisition transactions; therefore, these are critical accounting policies. Factors that may cause sensitivity to the aforementioned estimates include but are not limited to: external market factors such as market interest rates and employment rates, changes to operating policies and procedures, changes in applicable banking or tax regulations, and changes to deferred tax estimates. Actual results may ultimately differ from estimates, although management does not generally believe such differences would materially affect the consolidated financial statements in any individual reporting period presented. There have been no material changes or developments with respect to the assumptions or methodologies that the Company uses when applying what management believes are critical accounting policies and developing critical accounting estimates as disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.
Recent Accounting Developments Adopted	Recent Accounting Developments Adopted In May 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, Compensation – Stock Compensation (Topic 718) In January 2017, the FASB issued ASU 2017-01 to clarify the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets versus businesses. The update narrows the definition of a business by adding three principal clarifications (1) if substantially all the fair value of the gross assets in the asset group is concentrated in either a single identifiable asset or group of similar identifiable assets the transaction does not involve a business, (2) if the asset group does not include a minimum of an input and a substantive process, it does not represent a business, and (3) if the integrated set of activities (including its inputs and processes) does not create, or have the ability to create, goods or services to customers, investment income (e.g., dividends or interest) or other revenue, it is not a business. The overall intention is to provide consistency in applying the guidance and make the definition of a business more operable. This update is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years and should be applied prospectively. The Company adopted the updated guidance effective January 1, 2018 with no material impact on its consolidated financial statements. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606).
Operating Segment	Operating Segment While the chief decision makers monitor the revenue streams of the various products and services, and evaluate costs, balance sheet positions and quality, all such products, services and activities are directly or indirectly related to the business of community banking, with no regular, formal or material segment delineations. Operations are managed and financial performance is evaluated on a company-wide basis, and accordingly, all the financial service operations are considered by management to be aggregated in one reportable operating segment.
Reclassifications	Reclassifications Certain amounts in the 2017 consolidated financial statements have been reclassified to conform to the 2018 presentation.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of basic and diluted earnings (loss) per common share	Three Months Ended (In thousands except per share data) 2018 2017 Net income attributable to Nicolet Bankshares, Inc. $ 9,577 $ 6,208 Weighted average common shares outstanding 9,765 8,584 Effect of dilutive common stock awards 460 374 Diluted weighted average common shares outstanding 10,225 8,958 Basic earnings per common share* $ 0.98 $ 0.72 Diluted earnings per common share* $ 0.94 $ 0.69 *Cumulative quarterly per share performance may not equal annual per share totals due to the effects of the amount and timing of capital increases. When computing earnings per share for an interim period, the denominator is based on the weighted-average shares outstanding during the interim period, and not on an annualized weighted-average basis. Accordingly, the sum of the quarters' earnings per share data will not necessarily equal the year to date earnings per share data.

Stock-based Compensation (Table

Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of weighted average assumption for stock option	Three Months Ended Dividend yield 0 % Expected volatility 25 % Risk-free interest rate 2.48 % Expected average life 7 years Weighted average per share fair value of options $ 17.60
Schedule of stock options outstanding	Stock Options Option Shares Weighted Weighted Aggregate Outstanding – December 31, 2017 1,643,255 $ 39.82 Granted 10,000 54.06 Exercise of stock options * (19,796 ) 21.61 Forfeited (3,500 ) 42.32 Outstanding – March 31, 2018 1,629,959 $ 40.12 7.9 $ 24,569 Exercisable – March 31, 2018 380,909 $ 23.63 5.3 $ 11,674 * The terms of the stock option agreements permit having a number of shares of stock withheld, the fair market value of which as of the date of exercise is sufficient to satisfy the exercise price and/or tax withholding requirements, and accordingly no share were surrendered to the Company for the three months ended March 31, 2018.
Schedule of restricted stock awards	Restricted Stock Weighted- Restricted Outstanding – December 31, 2017 $ 34.26 30,920 Granted 56.01 3,000 Vested * 31.45 (6,134 ) Forfeited - - Outstanding – March 31, 2018 $ 37.24 27,786 * The terms of the restricted stock agreements permit the surrender of shares to the Company upon vesting in order to satisfy applicable tax withholding requirements at the minimum statutory withholding rate, and accordingly, 1,492 shares were surrendered during the three months ended March 31, 2018.

Securities Available for Sale (

Securities Available for Sale (Tables)	3 Months Ended
	Mar. 31, 2018
Available-for-sale Securities [Abstract]
Schedule of amortized costs and fair values of securities AFS	March 31, 2018 (in thousands) Amortized Cost Gross Gross Fair Value U.S. government agency securities $ 26,707 $ - $ 522 $ 26,185 State, county and municipals 179,951 75 4,117 175,909 Mortgage-backed securities 155,040 106 4,023 151,123 Corporate debt securities 48,314 210 611 47,913 Total $ 410,012 $ 391 $ 9,273 $ 401,130 December 31, 2017 (in thousands) Amortized Cost Gross Gross Fair Value U.S. government agency securities $ 26,586 $ - $ 377 $ 26,209 State, county and municipals 186,128 180 2,264 184,044 Mortgage-backed securities 157,705 160 2,333 155,532 Corporate debt securities 36,387 449 39 36,797 Equity securities * 1,287 1,284 - 2,571 Total $ 408,093 $ 2,073 $ 5,013 $ 405,153 * Effective January 1, 2018, the Company adopted ASU 2016-01, which requires equity securities with readily determinable fair values to be measured at fair value with changes in the fair value recognized through net income. Such securities are no longer reflected as securities AFS. As a result of this accounting change, in the first quarter of 2018 the Company recognized a cumulative-effect adjustment from accumulated other comprehensive income to retained earnings of approximately $0.9 million in the consolidated statement of stockholders’ equity for the net of tax impact of the unrealized gain on equity securities as of the date of adoption and recognized a loss of $25,000 in the consolidated statements of income for the change in fair value on equity securities since adoption. In addition, the approximately $2.5 million current fair value of equity securities is now reflected within other investments on the consolidated balance sheets rather than as securities AFS. Prior periods have not been restated for the impact of this accounting change. See Note 1 for additional information on this new accounting standard.
Schedule of unrealized losses and fair value	March 31, 2018 Less than 12 months 12 months or more Total ($ in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Number of U.S. government agency securities $ 10,364 $ 162 $ 15,821 $ 360 $ 26,185 $ 522 2 State, county and municipals 110,719 2,137 48,123 1,980 158,842 4,117 468 Mortgage-backed securities 73,606 1,522 65,367 2,501 138,973 4,023 228 Corporate debt securities 31,632 611 - - 31,632 611 16 Total $ 226,321 $ 4,432 $ 129,311 $ 4,841 $ 355,632 $ 9,273 714 December 31, 2017 Less than 12 months 12 months or more Total ($ in thousands) Fair Unrealized Fair Unrealized Fair Unrealized Number of U.S. government agency securities $ 26,209 $ 377 $ - $ - $ 26,209 $ 377 2 State, county and municipals 110,157 1,097 49,326 1,167 159,483 2,264 465 Mortgage-backed securities 72,210 735 65,537 1,598 137,747 2,333 215 Corporate debt securities 10,172 39 - - 10,172 39 5 Total $ 218,748 $ 2,248 $ 114,863 $ 2,765 $ 333,611 $ 5,013 687
Schedule of amortized cost and fair value classified by contractual maturities	March 31, 2018 (in thousands) Amortized Cost Fair Value Due in less than one year $ 17,307 $ 17,278 Due in one year through five years 128,152 126,324 Due after five years through ten years 102,246 98,947 Due after ten years 7,267 7,458 254,972 250,007 Mortgage-backed securities 155,040 151,123 Securities available for sale $ 410,012 $ 401,130

Loans, Allowance for Loan Los22

Loans, Allowance for Loan Losses, and Credit Quality (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Schedule of loan composition and further breakdown summarized by originated and acquired	Total March 31, 2018 December 31, 2017 (in thousands) Amount % of Amount % of Commercial & industrial $ 650,197 31.0 % $ 637,337 30.5 % Owner-occupied commercial real estate (“CRE”) 437,672 20.8 430,043 20.6 Agricultural (“AG”) production 33,741 1.6 35,455 1.7 AG real estate 53,412 2.5 51,778 2.5 CRE investment 323,048 15.4 314,463 15.1 Construction & land development 77,708 3.7 89,660 4.3 Residential construction 31,075 1.5 36,995 1.8 Residential first mortgage 365,318 17.4 363,352 17.4 Residential junior mortgage 105,903 5.0 106,027 5.1 Retail & other 22,523 1.1 22,815 1.0 Loans $ 2,100,597 100.0 % $ 2,087,925 100.0 % Less allowance for loan losses 12,765 12,653 Loans, net $ 2,087,832 $ 2,075,272 Allowance for loan losses to loans 0.61 % 0.61 % March 31, 2018 December 31, 2017 (in thousands) Originated % of Acquired % of Originated % of Acquired % of Commercial & industrial $ 507,460 39.2 % $ 142,737 17.7 % $ 488,600 39.3 % $ 148,737 17.6 % Owner-occupied CRE 247,049 19.1 190,623 23.7 237,548 19.1 192,495 22.8 AG production 10,515 0.8 23,226 2.9 11,102 0.9 24,353 2.9 AG real estate 30,014 2.3 23,398 2.9 27,831 2.2 23,947 2.8 CRE investment 131,426 10.2 191,622 23.8 113,862 9.2 200,601 23.8 Construction & land development 50,348 3.9 27,360 3.4 56,061 4.5 33,599 4.0 Residential construction 29,104 2.2 1,971 0.2 33,615 2.7 3,380 0.4 Residential first mortgage 202,567 15.7 162,751 20.2 191,186 15.4 172,166 20.4 Residential junior mortgage 67,654 5.2 38,249 4.7 65,643 5.3 40,384 4.8 Retail & other 18,611 1.4 3,912 0.5 18,254 1.4 4,561 0.5 Loans 1,294,748 100.0 % 805,849 100.0 % 1,243,702 100.0 % 844,223 100.0 % Less ALLL 10,699 2,066 10,542 2,111 Loans, net $ 1,284,049 $ 803,783 $ 1,233,160 $ 842,112 ALLL to loans 0.83 % 0.26 % 0.85 % 0.25 %
Schedule of roll forward of allowance for loan losses	Three Months Ended Year Ended (in thousands) March 31, 2018 March 31, 2017 December 31, 2017 Beginning balance $ 12,653 $ 11,820 $ 11,820 Provision for loan losses 510 450 2,325 Charge-offs (430 ) (111 ) (1,604 ) Recoveries 32 30 112 Net charge-offs (398 ) (81 ) (1,492 ) Ending balance $ 12,765 $ 12,189 $ 12,653
Schedule of changes in ALLL by portfolio segment and further breakdown summarized by originated and acquired	TOTAL – Three Months Ended March 31, 2018 (in thou sands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL: Beginning balance $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 Provision 545 34 (8 ) 16 133 (232 ) (39 ) 19 (31 ) 73 510 Charge-offs (343 ) (31 ) - - - - - - - (56 ) (430 ) Recoveries 1 1 - - - - - - 28 2 32 Net charge-offs (342 ) (30 ) - - - - - - 28 (54 ) (398 ) Ending balance $ 5,137 $ 2,611 $ 121 $ 312 $ 1,521 $ 494 $ 212 $ 1,628 $ 485 $ 244 $ 12,765 As percent of ALLL 40.2 % 20.5 % 0.9 % 2.4 % 11.9 % 3.9 % 1.7 % 12.8 % 3.8 % 1.9 % 100.0 % ALLL: Individually evaluated $ 115 $ - $ - $ - $ 35 $ - $ - $ - $ - $ - $ 150 Collectively evaluated 5,022 2,611 121 312 1,486 494 212 1,628 485 244 12,615 Ending balance $ 5,137 $ 2,611 $ 121 $ 312 $ 1,521 $ 494 $ 212 $ 1,628 $ 485 $ 244 $ 12,765 Loans: Individually evaluated $ 6,273 $ 1,886 $ - $ 235 $ 2,798 $ 1,049 $ 80 $ 3,060 $ 87 $ 12 $ 15,480 Collectively evaluated 643,924 435,786 33,741 53,177 320,250 76,659 30,995 362,258 105,816 22,511 2,085,117 Total loans $ 650,197 $ 437,672 $ 33,741 $ 53,412 $ 323,048 $ 77,708 $ 31,075 $ 365,318 $ 105,903 $ 22,523 $ 2,100,597 Less ALLL $ 5,137 $ 2,611 $ 121 $ 312 $ 1,521 $ 494 $ 212 $ 1,628 $ 485 $ 244 $ 12,765 Net loans $ 645,060 $ 435,061 $ 33,620 $ 53,100 $ 321,527 $ 77,214 $ 30,863 $ 363,690 $ 105,418 $ 22,279 $ 2,087,832 Originated – Three Months Ended March 31, 2018 (in thousands) Commercial Owner- AG AG real CRE Construction & Residential Residential Residential Retail & Total ALLL: Beginning balance $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 Provision 565 47 (6 ) 16 116 (216 ) (30 ) 20 (28 ) 73 557 Charge-offs (343 ) (31 ) - - - - - - - (56 ) (430 ) Recoveries - - - - - - - - 28 2 30 Net charge-offs (343 ) (31 ) - - - - - - 28 (54 ) (400 ) Ending balance $ 4,414 $ 2,131 $ 106 $ 251 $ 1,270 $ 412 $ 170 $ 1,317 $ 409 $ 219 $ 10,699 As percent of ALLL 41.3 % 19.9 % 1.0 % 2.3 % 11.9 % 3.9 % 1.6 % 12.3 % 3.8 % 2.0 100.0 % ALLL: Individually evaluated $ 115 $ - $ - $ - $ 35 $ - $ - $ - $ - $ - $ 150 Collectively evaluated 4,299 2,131 106 251 1,235 412 170 1,317 409 219 10,549 Ending balance $ 4,414 $ 2,131 $ 106 $ 251 $ 1,270 $ 412 $ 170 $ 1,317 $ 409 $ 219 $ 10,699 Loans: Individually evaluated $ 2,686 $ 343 $ - $ - $ 1,522 $ - $ - $ 511 $ - $ - $ 5,062 Collectively evaluated 504,774 246,706 10,515 30,014 129,904 50,348 29,104 202,056 67,654 18,611 1,289,686 Total loans $ 507,460 $ 247,049 $ 10,515 $ 30,014 $ 131,426 $ 50,348 $ 29,104 $ 202,567 $ 67,654 $ 18,611 $ 1,294,748 Less ALLL $ 4,414 $ 2,131 $ 106 $ 251 $ 1,270 $ 412 $ 170 $ 1,317 $ 409 $ 219 $ 10,699 Net loans $ 503,046 $ 244,918 $ 10,409 $ 29,763 $ 130,156 $ 49,936 $ 28,934 $ 201,250 $ 67,245 $ 18,392 $ 1,284,049 Acquired – Three Months Ended March 31, 2018 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL: Beginning balance $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 Provision (20 ) (13 ) (2 ) - 17 (16 ) (9 ) (1 ) (3 ) - (47 ) Charge-offs - - - - - - - - - - - Recoveries 1 1 - - - - - - - - 2 Net charge-offs 1 1 - - - - - - - - 2 Ending balance $ 723 $ 480 $ 15 $ 61 $ 251 $ 82 $ 42 $ 311 $ 76 $ 25 $ 2,066 As percent of ALLL 35.0 % 23.2 % 0.7 % 3.0 % 12.1 % 4.0 % 2.0 % 15.1 % 3.7 % 1.2 % 100.0 % ALLL: Individually evaluated $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - Collectively evaluated 723 480 15 61 251 82 42 311 76 25 2,066 Ending balance $ 723 $ 480 $ 15 $ 61 $ 251 $ 82 $ 42 $ 311 $ 76 $ 25 $ 2,066 Loans: Individually evaluated $ 3,587 $ 1,543 $ - $ 235 $ 1,276 $ 1,049 $ 80 $ 2,549 $ 87 $ 12 $ 10,418 Collectively evaluated 139,150 189,080 23,226 23,163 190,346 26,311 1,891 160,202 38,162 3,900 795,431 Total loans $ 142,737 $ 190,623 $ 23,226 $ 23,398 $ 191,622 $ 27,360 $ 1,971 $ 162,751 $ 38,249 $ 3,912 $ 805,849 Less ALLL $ 723 $ 480 $ 15 $ 61 $ 251 $ 82 $ 42 $ 311 $ 76 $ 25 $ 2,066 Net loans $ 142,014 $ 190,143 $ 23,211 $ 23,337 $ 191,371 $ 27,278 $ 1,929 $ 162,440 $ 38,173 $ 3,887 $ 803,783 TOTAL – Year Ended December 31, 2017 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL Beginning balance $ 3,919 $ 2,867 $ 150 $ 285 $ 1,124 $ 774 $ 304 $ 1,784 $ 461 $ 152 $ 11,820 Provision 2,419 (290 ) (21 ) 11 263 (35 ) (53 ) (192 ) 96 127 2,325 Charge-offs (1,442 ) - - - - (13 ) - (8 ) (72 ) (69 ) (1,604 ) Recoveries 38 30 - - 1 - - 25 3 15 112 Net charge-offs (1,404 ) 30 - - 1 (13 ) - 17 (69 ) (54 ) (1,492 ) Ending balance $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 As percent of ALLL 39.0 % 20.6 % 1.0 % 2.3 % 11.0 % 5.7 % 2.0 % 12.7 % 3.9 % 1.8 % 100.0 % ALLL: Individually evaluated $ 163 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ 163 Collectively evaluated 4,771 2,607 129 296 1,388 726 251 1,609 488 225 12,490 Ending balance $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 Loans: Individually evaluated $ 5,870 $ 1,689 $ - $ 248 $ 5,290 $ 1,053 $ 80 $ 2,801 $ 178 $ 12 $ 17,221 Collectively evaluated 631,467 428,354 35,455 51,530 309,173 88,607 36,915 360,551 105,849 22,803 2,070,704 Total loans $ 637,337 $ 430,043 $ 35,455 $ 51,778 $ 314,463 $ 89,660 $ 36,995 $ 363,352 $ 106,027 $ 22,815 $ 2,087,925 Less ALLL $ 4,934 $ 2,607 $ 129 $ 296 $ 1,388 $ 726 $ 251 $ 1,609 $ 488 $ 225 $ 12,653 Net loans $ 632,403 $ 427,436 $ 35,326 $ 51,482 $ 313,075 $ 88,934 $ 36,744 $ 361,743 $ 105,539 $ 22,590 $ 2,075,272 Originated – Year Ended December 31, 2017 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL Beginning balance $ 3,150 $ 2,263 $ 122 $ 222 $ 893 $ 656 $ 266 $ 1,372 $ 373 $ 132 $ 9,449 Provision 2,429 (172 ) (10 ) 13 261 (28 ) (66 ) (69 ) 105 122 2,585 Charge-offs (1,388 ) - - - - - - (8 ) (72 ) (69 ) (1,537 ) Recoveries 1 24 - - - - - 2 3 15 45 Net charge-offs (1,387 ) 24 - - - - - (6 ) (69 ) (54 ) (1,492 ) Ending balance $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 As percent of ALLL 39.8 % 20.1 % 1.1 % 2.2 % 10.9 % 6.0 % 1.9 % 12.3 % 3.9 % 1.8 % 100.0 % ALLL: Individually evaluated $ 163 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ 163 Collectively evaluated 4,029 2,115 112 235 1,154 628 200 1,297 409 200 10,379 Ending balance $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 Loans: Individually evaluated $ 2,189 $ - $ - $ - $ 549 $ - $ - $ 253 $ 12 $ - $ 3,003 Collectively evaluated 486,411 237,548 11,102 27,831 113,313 56,061 33,615 190,933 65,631 18,254 1,240,699 Total loans $ 488,600 $ 237,548 $ 11,102 $ 27,831 $ 113,862 $ 56,061 $ 33,615 $ 191,186 $ 65,643 $ 18,254 $ 1,243,702 Less ALLL $ 4,192 $ 2,115 $ 112 $ 235 $ 1,154 $ 628 $ 200 $ 1,297 $ 409 $ 200 $ 10,542 Net loans $ 484,408 $ 235,433 $ 10,990 $ 27,596 $ 112,708 $ 55,433 $ 33,415 $ 189,889 $ 65,234 $ 18,054 $ 1,233,160 Acquired – Year Ended December 31, 2017 (in thousands) Commercial Owner- AG AG real CRE Construction Residential Residential Residential Retail & Total ALLL Beginning balance $ 769 $ 604 $ 28 $ 63 $ 231 $ 118 $ 38 $ 412 $ 88 $ 20 $ 2,371 Provision (10 ) (118 ) (11 ) (2 ) 2 (7 ) 13 (123 ) (9 ) 5 (260 ) Charge-offs (54 ) - - - - (13 ) - - - - (67 ) Recoveries 37 6 - - 1 - - 23 - - 67 Net charge-offs (17 ) 6 - - 1 (13 ) - 23 - - - Ending balance $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 As percent of ALLL 35.1 % 23.3 % 0.8 % 2.9 % 11.1 % 4.6 % 2.4 % 14.8 % 3.7 % 1.3 % 100.0 % ALLL: Individually evaluated $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - Collectively evaluated 742 492 17 61 234 98 51 312 79 25 2,111 Ending balance $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 Loans: Individually evaluated $ 3,681 $ 1,689 $ - $ 248 $ 4,741 $ 1,053 $ 80 $ 2,548 $ 166 $ 12 $ 14,218 Collectively evaluated 145,056 190,806 24,353 23,699 195,860 32,546 3,300 169,618 40,218 4,549 830,005 Total loans $ 148,737 $ 192,495 $ 24,353 $ 23,947 $ 200,601 $ 33,599 $ 3,380 $ 172,166 $ 40,384 $ 4,561 $ 844,223 Less ALLL $ 742 $ 492 $ 17 $ 61 $ 234 $ 98 $ 51 $ 312 $ 79 $ 25 $ 2,111 Net loans $ 147,995 $ 192,003 $ 24,336 $ 23,886 $ 200,367 $ 33,501 $ 3,329 $ 171,854 $ 40,305 $ 4,536 $ 842,112
Schedule of nonaccrual loans by portfolio segment and further breakdown summarized by originated and acquired	Total Nonaccrual Loans (in thousands) March 31, 2018 % of Total December 31, 2017 % of Total Commercial & industrial $ 6,434 55.2 % $ 6,016 46.0 % Owner-occupied CRE 744 6.4 533 4.1 AG production - - - - AG real estate 175 1.5 186 1.4 CRE investment 2,105 18.1 4,531 34.6 Construction & land development - - - - Residential construction 108 0.9 80 0.6 Residential first mortgage 1,883 16.1 1,587 12.1 Residential junior mortgage 212 1.8 158 1.2 Retail & other - - 4 - Nonaccrual loans 11,661 100.0 % 13,095 100.0 % Percent of total loans 0.6 % 0.6 % March 31, 2018 December 31, 2017 (in thousands) Originated % of Acquired % of Originated % of Acquired % of Commercial & industrial $ 2,814 51.7 % $ 3,620 58.3 % $ 2,296 70.0 % $ 3,720 37.9 % Owner-occupied CRE 411 7.5 333 5.4 86 2.6 447 4.6 AG production - - - - - - - - AG real estate - - 175 2.8 - - 186 1.9 CRE investment 1,522 28.0 583 9.3 549 16.8 3,982 40.6 Construction & land development - - - - - - - - Residential construction 28 0.5 80 1.3 - - 80 0.8 Residential first mortgage 672 12.3 1,211 19.5 331 10.1 1,256 12.8 Residential junior mortgage - - 212 3.4 12 0.4 146 1.4 Retail & other - - - - 4 0.1 - - Nonaccrual loans $ 5,447 100.0 % $ 6,214 100.0 % $ 3,278 100.0 % $ 9,817 100.0 %
Schedule of past due loans by portfolio segment and further breakdown summarized by originated and acquired	March 31, 2018 (in thousands) 30-89 Days Past 90 Days & Current Total Commercial & industrial $ 470 $ 6,434 $ 643,293 $ 650,197 Owner-occupied CRE - 744 436,928 437,672 AG production - - 33,741 33,741 AG real estate - 175 53,237 53,412 CRE investment - 2,105 320,943 323,048 Construction & land development 437 - 77,271 77,708 Residential construction - 108 30,967 31,075 Residential first mortgage 1,258 1,883 362,177 365,318 Residential junior mortgage 72 212 105,619 105,903 Retail & other 127 - 22,396 22,523 Total loans $ 2,364 $ 11,661 $ 2,086,572 $ 2,100,597 Percent of total loans 0.1 % 0.6 % 99.3 % 100.0 % December 31, 2017 (in thousands) 30-89 Days Past 90 Days & Current Total Commercial & industrial $ 211 $ 6,016 $ 631,110 $ 637,337 Owner-occupied CRE 671 533 428,839 430,043 AG production 30 - 35,425 35,455 AG real estate - 186 51,592 51,778 CRE investment - 4,531 309,932 314,463 Construction & land development 76 - 89,584 89,660 Residential construction 587 80 36,328 36,995 Residential first mortgage 1,039 1,587 360,726 363,352 Residential junior mortgage 14 158 105,855 106,027 Retail & other 4 4 22,807 22,815 Total loans $ 2,632 $ 13,095 $ 2,072,198 $ 2,087,925 Percent of total loans 0.1 % 0.6 % 99.3 % 100.0 %
Schedule of loans by loan grade	March 31, 2018 (in thousands) Grades 1- 4 Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Total Commercial & industrial $ 610,654 $ 18,692 $ 11,621 $ 9,230 $ - $ - $ 650,197 Owner-occupied CRE 399,911 28,718 4,566 4,477 - - 437,672 AG production 28,348 2,342 1,383 1,668 - - 33,741 AG real estate 45,924 2,645 2,316 2,527 - - 53,412 CRE investment 312,103 7,220 1,215 2,510 - - 323,048 Construction & land development 73,832 3,092 17 767 - - 77,708 Residential construction 30,967 - - 108 - - 31,075 Residential first mortgage 360,169 1,522 672 2,955 - - 365,318 Residential junior mortgage 105,659 17 - 227 - - 105,903 Retail & other 22,523 - - - - - 22,523 Total loans $ 1,990,090 $ 64,248 $ 21,790 $ 24,469 $ - $ - $ 2,100,597 Percent of total 94.7 % 3.1 % 1.0 % 1.2 % - - 100.0 % December 31, 2017 (in thousands) Grades 1- 4 Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Total Commercial & industrial $ 597,854 $ 12,999 $ 16,129 $ 10,355 $ - $ - $ 637,337 Owner-occupied CRE 397,357 23,340 6,442 2,904 - - 430,043 AG production 30,431 4,000 - 1,024 - - 35,455 AG real estate 44,321 4,873 - 2,584 - - 51,778 CRE investment 299,926 8,399 190 5,948 - - 314,463 Construction & land development 86,011 2,758 17 874 - - 89,660 Residential construction 36,915 - - 80 - - 36,995 Residential first mortgage 358,067 1,868 683 2,734 - - 363,352 Residential junior mortgage 105,736 117 - 174 - - 106,027 Retail & other 22,811 - - 4 - - 22,815 Total loans $ 1,979,429 $ 58,354 $ 23,461 $ 26,681 $ - $ - $ 2,087,925 Percent of total 94.8 % 2.8 % 1.1 % 1.3 % - - 100.0 %
Schedule of impaired loans and further breakdown summarized by originated and acquired	Total Impaired Loans – March 31, 2018 (in thousands) Recorded Unpaid Principal Related Average Interest Income Commercial & industrial $ 6,273 $ 10,457 $ 115 $ 6,535 $ 164 Owner-occupied CRE 1,886 2,397 - 1,908 45 AG production - 9 - - - AG real estate 235 295 - 242 12 CRE investment 2,798 4,142 35 2,811 128 Construction & land development 1,049 1,049 - 1,051 12 Residential construction 80 983 - 80 - Residential first mortgage 3,060 3,847 - 3,062 55 Residential junior mortgage 87 407 - 88 7 Retail & Other 12 14 - 12 - Total $ 15,480 $ 23,600 $ 150 $ 15,789 $ 423 Originated impaired loans $ 5,062 $ 5,062 $ 150 $ 5,283 $ 74 Acquired impaired loans 10,418 18,538 - 10,506 349 Total $ 15,480 $ 23,600 $ 150 $ 15,789 $ 423 Total Impaired Loans – December 31, 2017 (in thousands) Recorded Unpaid Principal Related Average Interest Income Commercial & industrial $ 5,870 $ 10,063 $ 163 $ 6,586 $ 718 Owner-occupied CRE 1,689 2,256 - 1,333 132 AG production - 10 - - - AG real estate 248 307 - 233 26 CRE investment 5,290 8,102 - 5,411 465 Construction & land development 1,053 1,053 - 813 57 Residential construction 80 983 - 91 27 Residential first mortgage 2,801 3,653 - 2,177 180 Residential junior mortgage 178 507 - 154 17 Retail & Other 12 14 - 12 1 Total $ 17,221 $ 26,948 $ 163 $ 16,810 $ 1,623 Originated impaired loans $ 3,003 $ 3,003 $ 163 $ 2,964 $ 241 Acquired impaired loans 14,218 23,945 - 13,846 1,382 Total $ 17,221 $ 26,948 $ 163 $ 16,810 $ 1,623
Schedule of non accretable discount	Three Months Ended Year Ended (in thousands) March 31, 2018 March 31, 2017 December 31, 2017 Balance at beginning of period $ 9,471 $ 14,327 $ 14,327 Acquired balance, net - - 8,352 Accretion to loan interest income (1,544 ) (2,160 ) (7,995 ) Transferred to accretable (55 ) - (1,936 ) Disposals of loans - (242 ) (3,277 ) Balance at end of period $ 7,872 $ 11,925 $ 9,471

Goodwill and Other Intangible23

Goodwill and Other Intangibles and Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill and intangible assets included in other assets	Three Months Ended Year Ended (in thousands) March 31, 2018 December 31, 2017 Goodwill $ 107,366 $ 107,366 Core deposit intangibles 15,407 16,477 Customer list intangibles 4,451 4,563 Other intangibles 19,858 21,040 Goodwill and other intangibles, net $ 127,224 $ 128,406
Schedule of intangible assets	Three Months Ended Year Ended (in thousands) March 31, 2018 December 31, 2017 Core deposit intangibles: Gross carrying amount $ 29,015 $ 29,015 Accumulated amortization (13,608 ) (12,538 ) Net book value $ 15,407 $ 16,477 Additions during the period $ - $ 3,670 Amortization during the period $ 1,070 $ 4,294 Customer list intangibles: Gross carrying amount $ 5,233 $ 5,233 Accumulated amortization (782 ) (670 ) Net book value $ 4,451 $ 4,563 Additions during the period $ - $ 870 Amortization during the period $ 112 $ 401
Schedule of mortgage servicing rights	Three Months Ended Year Ended (in thousands) March 31, 2018 December 31, 2017 Mortgage servicing rights (MSR) asset: MSR asset at beginning of year $ 3,187 $ 1,922 Capitalized MSR 103 876 MSR asset acquired - 874 Amortization during the period (150 ) (485 ) MSR asset at end of period $ 3,140 $ 3,187 Fair value of MSR asset at end of period $ 4,039 $ 4,097 Residential mortgage loans serviced for others $ 515,263 $ 518,419 Net book value of MSR asset to loans serviced for others 0.61 % 0.61 %
Schedule of estimated future amortization expense for amortizing intangible assets	(in thousands) Core deposit Customer list MSR asset Year ending December 31, 2018 (remaining nine months) $ 2,845 $ 337 $ 434 2019 3,337 449 578 2020 2,657 449 728 2021 2,167 449 326 2022 1,735 449 326 Thereafter 2,666 2,318 748 Total $ 15,407 $ 4,451 $ 3,140

Short and Long-Term Borrowings

Short and Long-Term Borrowings (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of components of long-term borrowings	(in thousands) March 31, 2018 December 31, 2017 FHLB advances $ 35,445 $ 36,509 Junior subordinated debentures 29,736 29,616 Subordinated notes 11,931 11,921 Total long-term borrowings $ 77,112 $ 78,046
Schedule of FHLB advances	Maturing in: (in thousands) 2018 (remaining nine months) $ 17 2019 - 2020 10,000 2021 - 2022 25,428 $ 35,445
Schedule of Junior subordinated debentures	Junior Subordinated Debentures (in thousands) Maturity Date Par 3/31/2018 Unamortized 3/31/2018 Carrying 12/31/2017 Carrying 2004 Nicolet Bankshares Statutory Trust (1) 7/15/2034 $ 6,186 $ - $ 6,186 $ 6,186 2005 Mid-Wisconsin Financial Services, Inc. (2) 12/15/2035 10,310 (3,521 ) 6,789 6,739 2006 Baylake Corp. (3) 9/30/2036 16,598 (4,297 ) 12,301 12,242 2004 First Menasha Bancshares, Inc. (4) 3/17/2034 5,155 (695 ) 4,460 4,449 Total $ 38,249 $ (8,513 ) $ 29,736 $ 29,616 (1) The interest rate is 8.00% fixed. (2) The debentures, assumed in April 2013 as the result of an acquisition, have a floating rate of the three-month LIBOR plus 1.43%, adjusted quarterly. The interest rates were 3.55% and 3.02% as of March 31, 2018 and December 31, 2017, respectively. (3) The debentures, assumed in April 2016 as a result of an acquisition, have a floating rate of the three-month LIBOR plus 1.35%, adjusted quarterly. The interest rates were 3.66% and 3.04% as of March 31, 2018 and December 31, 2017, respectively. (4) The debentures, assumed in April 2017 as the result of an acquisition, have a floating rate of the three-month LIBOR plus 2.79%, adjusted quarterly. The interest rate was 4.98% and 4.39% as of March 31, 2018 and December 31, 2017, respectively.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured at fair value on a recurring basis	(in thousands) Fair Value Measurements Using Measured at Fair Value on a Recurring Basis: Total Level 1 Level 2 Level 3 March 31, 2018: U.S. government agency securities $ 26,185 $ - $ 26,185 $ - State, county and municipals 175,909 - 175,778 131 Mortgage-backed securities 151,123 - 151,123 - Corporate debt securities 47,913 - 39,449 8,464 Securities AFS $ 401,130 $ - $ 392,535 $ 8,595 Other investments (equity securities) * $ 2,546 $ 2,546 $ - $ - December 31, 2017: U.S. government agency securities $ 26,209 $ - $ 26,209 $ - State, county and municipals 184,044 - 183,386 658 Mortgage-backed securities 155,532 - 155,529 3 Corporate debt securities 36,797 - 28,307 8,490 Equity securities * 2,571 2,571 - - Securities AFS $ 405,153 $ 2,571 $ 393,431 $ 9,151 * Effective January 1, 2018, the Company adopted ASU 2016-01, which requires equity securities with readily determinable fair values to be measured at fair value with changes in the fair value recognized through net income. In addition, the approximately $2.5 million current fair value of equity securities is now reflected within other investments on the consolidated balance sheets compared to securities AFS at December 31, 2017. Prior periods have not been restated for the impact of this accounting change. See Note 1 for additional information on this new accounting standard and see Note 5 for additional information on the impact to securities AFS.
Schedule of changes in the Level 3 assets measured at fair value on a recurring basis	(in thousands) Three Months Ended Year Ended Level 3 Fair Value Measurements: March 31, 2018 December 31, 2017 Balance at beginning of year $ 9,151 $ 9,108 Acquired balance - 189 Paydowns/Sales/Settlements (556 ) (146 ) Balance at end of period $ 8,595 $ 9,151
Schedule of assets measured at fair value on a nonrecurring basis	Fair Value Measurements Using Measured at Fair Value on a Nonrecurring Basis: Total Level 1 Level 2 Level 3 (in thousands) March 31, 2018: Impaired loans $ 15,330 $ - $ - $ 15,330 Other real estate owned (“OREO”) 1,367 - - 1,367 MSR asset 3,140 - - 3,140 December 31, 2017: Impaired loans $ 17,058 $ - $ - $ 17,058 OREO 1,294 - - 1,294 MSR asset 3,187 - - 3,187
Schedule of estimated fair values of financial instruments	March 31, 2018 (in thousands) Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 433,015 $ 433,015 $ 433,015 $ - $ - Certificates of deposit in other banks 1,248 1,234 - 1,234 - Securities AFS 401,130 401,130 - 392,535 8,595 Other investments, including equity securities 17,431 17,431 2,546 13,177 1,708 Loans held for sale 7,880 7,920 - 7,920 - Loans, net 2,087,832 2,082,372 - - 2,082,372 BOLI 64,895 64,895 64,895 - - MSR asset 3,140 4,039 - - 4,039 Financial liabilities: Deposits $ 2,765,090 $ 2,763,061 $ - $ - $ 2,763,061 FHLB advances 35,445 35,447 - 35,447 - Junior subordinated debentures 29,736 29,141 - - 29,141 Subordinated notes 11,931 11,504 - - 11,504 December 31, 2017 (in thousands) Carrying Estimated Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 154,933 $ 154,933 $ 154,933 $ - $ - Certificates of deposit in other banks 1,746 1,746 - 1,746 - Securities AFS 405,153 405,153 2,571 393,431 9,151 Other investments 14,837 14,837 - 13,142 1,695 Loans held for sale 4,666 4,750 - 4,750 - Loans, net 2,075,272 2,068,382 - - 2,068,382 BOLI 64,453 64,453 64,453 - - MSR asset 3,187 4,097 - - 4,097 Financial liabilities: Deposits $ 2,471,064 $ 2,469,456 $ - $ - $ 2,469,456 FHLB advances 36,509 36,510 - 36,510 - Junior subordinated debentures 29,616 29,024 - - 29,024 Subordinated notes 11,921 11,495 - - 11,495

Basis of Presentation (Detail T

Basis of Presentation (Detail Textuals) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)Segment
Accounting Policies [Abstract]
Number of operating segments | Segment	1
Cumulative-effect adjustment for after tax impact of unrealized gain on equity securities | $	$ 0.9

Acquisitions (Detail Textuals)

Acquisitions (Detail Textuals) - First Menasha Bancshares, Inc $ / shares in Units, $ in Millions	1 Months Ended
	Apr. 28, 2017USD ($)Branch$ / sharesshares
Business Acquisition [Line Items]
Number of branches | Branch	5
Merger Agreement
Business Acquisition [Line Items]
Number of branches closed | Branch	1
Number of common stock issued for consideration | shares	1,309,885
Number of common stock for each outstanding share of common stock	3.126
Value of common stock issued for consideration	$ 62.2
Price per share for stock issued in consideration | $ / shares	$ 47.52
Number of trading days	20 days
Value of cash consideration	$ 19.3
Direct stock issuance costs for the merger charged against additional paid in capital	0.2
Amount of addition in assets	480
Amount of addition in loans	351
Amount of addition in deposit	375
Amount of addition in goodwill	41
Merger Agreement | Core deposit intangibles
Business Acquisition [Line Items]
Intangible assets assumed	$ 4

Earnings per Common Share - Cal

Earnings per Common Share - Calculations for basic and diluted earnings (loss) per common share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income attributable to Nicolet Bankshares, Inc.		$ 9,577	$ 6,208
Weighted average common shares outstanding		9,765,375	8,584,289
Effect of dilutive common stock awards		460,000	374,000
Diluted weighted average common shares outstanding		10,224,788	8,958,425
Basic earnings per common share (in dollars per share)	[1]	$ 0.98	$ 0.72
Diluted earnings per common share (in dollars per share)	[1]	$ 0.94	$ 0.69
[1]	Cumulative quarterly per share performance may not equal annual per share totals due to the effects of the amount and timing of capital increases. When computing earnings per share for an interim period, the denominator is based on the weighted-average shares outstanding during the interim period, and not on an annualized weighted-average basis. Accordingly, the sum of the quarters' earnings per share data will not necessarily equal the year to date earnings per share data.

Earnings per Common Share (Deta

Earnings per Common Share (Detail textuals) shares in Millions	3 Months Ended
	Mar. 31, 2018shares
Earnings Per Share [Abstract]
Shares excluded from calculation of earnings per common share	0.1

Stock-based Compensation - Weig

Stock-based Compensation - Weighted average assumptions (Details) - Stock Incentive Plan - Stock Options	3 Months Ended
	Mar. 31, 2018$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%
Expected volatility	25.00%
Risk-free interest rate	2.48%
Expected average life	7 years
Weighted average per share fair value of options	$ 17.60

Stock-based Compensation - Acti

Stock-based Compensation - Activity of stock incentive plans for options (Details 1) - Stock Incentive Plan - Stock Options $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)$ / sharesshares
Options Shares Outstanding
Balance | shares	1,643,255
Granted | shares	10,000
Exercise of stock options | shares	(19,796)	[1]
Forfeited | shares	(3,500)
Balance | shares	1,629,959
Weighted-Average Exercise Price
Balance | $ / shares	$ 39.82
Granted | $ / shares	54.06
Exercise of stock options | $ / shares	21.61	[1]
Forfeited | $ / shares	42.32
Balance | $ / shares	$ 40.12
Exercisable Shares, Ending Balance | shares	380,909
Weighted Average Exercise Price, Ending Balance | $ / shares	$ 23.63
Weighted average remaining life (years) outstanding	7 years 10 months 24 days
Weighted average remaining life (years) exercisable	5 years 3 months 18 days
Aggregate intrinsic value outstanding | $	$ 24,569
Aggregate intrinsic value exercisable | $	$ 11,674
[1]	The terms of the stock option agreements permit having a number of shares of stock withheld, the fair market value of which as of the date of exercise is sufficient to satisfy the exercise price and/or tax withholding requirements, and accordingly no share were surrendered to the Company for the three months ended March 31, 2018.

Stock-based Compensation - Ac32

Stock-based Compensation - Activity of restricted stock awards (Details 2) - Restricted Stock	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Weighted-Average Grant Date Fair Value
Balance | $ / shares	$ 34.26
Granted | $ / shares	56.01
Vested | $ / shares	31.45	[1]
Forfeited | $ / shares	0
Balance | $ / shares	$ 37.24
Restricted Shares Outstanding
Balance | shares	30,920
Granted | shares	3,000
Vested | shares	(6,134)	[1]
Forfeited | shares	0
Balance | shares	27,786
[1]	The terms of the restricted stock agreements permit the surrender of shares to the Company upon vesting in order to satisfy applicable tax withholding requirements at the minimum statutory withholding rate, and accordingly, 1,492 shares were surrendered during the three months ended March 31, 2018.

Stock-based Compensation (Detai

Stock-based Compensation (Detail Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised	$ 0.7	$ 1.2

Stock-based Compensation (Det34

Stock-based Compensation (Detail Textuals 1) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based employee compensation	$ 1,200,000	$ 384,000
Unrecognized compensation cost	$ 15,800,000
Remaining vesting period over which cost expected to be recognized	4 years
Employee service share-based compensation, Tax benefit from compensation expense	$ 200,000	$ 100,000
Restricted Stock Agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Numbers of shares surrendered (in shares)	1,492

Securities Available for Sale -

Securities Available for Sale - Amortized costs and fair values of securities available for sale (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		$ 410,012	$ 408,093
Gross Unrealized Gains		391	2,073
Gross Unrealized Losses		9,273	5,013
Fair Value		401,130	405,153
U.S. government agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		26,707	26,586
Gross Unrealized Gains		0	0
Gross Unrealized Losses		522	377
Fair Value		26,185	26,209
State, county and municipals
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		179,951	186,128
Gross Unrealized Gains		75	180
Gross Unrealized Losses		4,117	2,264
Fair Value		175,909	184,044
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		155,040	157,705
Gross Unrealized Gains		106	160
Gross Unrealized Losses		4,023	2,333
Fair Value		151,123	155,532
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		48,314	36,387
Gross Unrealized Gains		210	449
Gross Unrealized Losses		611	39
Fair Value		$ 47,913	36,797
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]		1,287
Gross Unrealized Gains	[1]		1,284
Gross Unrealized Losses	[1]		0
Fair Value	[1]		$ 2,571
[1]	Effective January 1, 2018, the Company adopted ASU 2016-01, which requires equity securities with readily determinable fair values to be measured at fair value with changes in the fair value recognized through net income. Such securities are no longer reflected as securities AFS. As a result of this accounting change, in the first quarter of 2018 the Company recognized a cumulative-effect adjustment from accumulated other comprehensive income to retained earnings of approximately $0.9 million in the consolidated statement of stockholders' equity for the net of tax impact of the unrealized gain on equity securities as of the date of adoption and recognized a loss of $25,000 in the consolidated statements of income for the change in fair value on equity securities since adoption. In addition, the approximately $2.5 million current fair value of equity securities is now reflected within other investments on the consolidated balance sheets rather than as securities AFS. Prior periods have not been restated for the impact of this accounting change. See Note 1 for additional information on this new accounting standard.

Securities Available for Sale36

Securities Available for Sale - Gross unrealized losses and the related fair value of securities available for sale (Details 1) $ in Thousands	Mar. 31, 2018USD ($)Security	Dec. 31, 2017USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 226,321	$ 218,748
Less than 12 months, Unrealized Losses	4,432	2,248
12 months or more, Fair Value	129,311	114,863
12 months or more, Unrealized Losses	4,841	2,765
Total, Fair Value	355,632	333,611
Total, Unrealized Losses	$ 9,273	$ 5,013
Number of securities | Security	714	687
U.S. government agency securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 10,364	$ 26,209
Less than 12 months, Unrealized Losses	162	377
12 months or more, Fair Value	15,821	0
12 months or more, Unrealized Losses	360	0
Total, Fair Value	26,185	26,209
Total, Unrealized Losses	$ 522	$ 377
Number of securities | Security	2	2
State, county and municipals
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 110,719	$ 110,157
Less than 12 months, Unrealized Losses	2,137	1,097
12 months or more, Fair Value	48,123	49,326
12 months or more, Unrealized Losses	1,980	1,167
Total, Fair Value	158,842	159,483
Total, Unrealized Losses	$ 4,117	$ 2,264
Number of securities | Security	468	465
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 73,606	$ 72,210
Less than 12 months, Unrealized Losses	1,522	735
12 months or more, Fair Value	65,367	65,537
12 months or more, Unrealized Losses	2,501	1,598
Total, Fair Value	138,973	137,747
Total, Unrealized Losses	$ 4,023	$ 2,333
Number of securities | Security	228	215
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 31,632	$ 10,172
Less than 12 months, Unrealized Losses	611	39
12 months or more, Fair Value	0	0
12 months or more, Unrealized Losses	0	0
Total, Fair Value	31,632	10,172
Total, Unrealized Losses	$ 611	$ 39
Number of securities | Security	16	5

Securities Available for Sale37

Securities Available for Sale - Amortized cost and fair values of securities available for sale at by contractual maturity (Details 2) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Due in less than one year	$ 17,307
Amortized Cost, Due in one year through five years	128,152
Amortized Cost, Due after five years through ten years	102,246
Amortized Cost, Due after ten years	7,267
Available for sale, Single maturity date, Amortized Cost	254,972
Amortized Cost, Securities available for sale	410,012	$ 408,093
Fair Value, Due in less than one year	17,278
Fair Value, Due in one year through five years	126,324
Fair Value, Due after five years through ten years	98,947
Fair Value, Due after ten years	7,458
Available for sale, Single maturity date, Fair value	250,007
Fair Value, Securities available for sale	401,130	405,153
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Securities available for sale	155,040	157,705
Fair Value, Securities available for sale	$ 151,123	$ 155,532

Securities Available for Sale38

Securities Available for Sale (Detail Textuals)	3 Months Ended
	Mar. 31, 2018USD ($)
Available-for-sale Securities [Abstract]
Cumulative-effect adjustment for after tax impact of unrealized gain on equity securities	$ 900,000
Gross losses realized on sales	25,000
Current fair value of equity securities reflected in other investments	$ 2,500,000

Loans, Allowance for Loan Los39

Loans, Allowance for Loan Losses, and Credit Quality - Summary of loan composition (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 2,100,597	$ 2,087,925
Less allowance for loan losses	12,765	12,653	$ 12,189	$ 11,820
Loans, net	$ 2,087,832	$ 2,075,272
% of Total	100.00%	100.00%
Allowance for loan losses to loans	0.61%	0.61%
Retail & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 22,523	$ 22,815
Less allowance for loan losses	244	225		152
Loans, net	$ 22,279	$ 22,590
% of Total	1.10%	1.00%
Commercial Portfolio Segment | Commercial & industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 650,197	$ 637,337
Less allowance for loan losses	5,137	4,934		3,919
Loans, net	$ 645,060	$ 632,403
% of Total	31.00%	30.50%
Commercial Portfolio Segment | Owner-occupied commercial real estate ("CRE")
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 437,672	$ 430,043
Less allowance for loan losses	$ 2,611	$ 2,607		2,867
% of Total	20.80%	20.60%
Commercial Portfolio Segment | Agricultural ("AG") production
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 33,741	$ 35,455
Less allowance for loan losses	121	129		150
Loans, net	$ 33,620	$ 35,326
% of Total	1.60%	1.70%
Commercial Real Estate Portfolio Segment | AG real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 53,412	$ 51,778
Less allowance for loan losses	312	296		285
Loans, net	$ 53,100	$ 51,482
% of Total	2.50%	2.50%
Commercial Real Estate Portfolio Segment | CRE investment
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 323,048	$ 314,463
Less allowance for loan losses	1,521	1,388		1,124
Loans, net	$ 321,527	$ 313,075
% of Total	15.40%	15.10%
Commercial Real Estate Portfolio Segment | Construction & land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 77,708	$ 89,660
Less allowance for loan losses	494	726		774
Loans, net	$ 77,214	$ 88,934
% of Total	3.70%	4.30%
Residential | Residential construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 31,075	$ 36,995
Less allowance for loan losses	212	251		304
Loans, net	$ 30,863	$ 36,744
% of Total	1.50%	1.80%
Residential | First mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 365,318	$ 363,352
Less allowance for loan losses	1,628	1,609		1,784
Loans, net	$ 363,690	$ 361,743
% of Total	17.40%	17.40%
Residential | Junior mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 105,903	$ 106,027
Less allowance for loan losses	485	488		461
Loans, net	$ 105,418	$ 105,539
% of Total	5.00%	5.10%
Originated
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,294,748	$ 1,243,702
Less allowance for loan losses	10,699	10,542		9,449
Loans, net	$ 1,284,049	$ 1,233,160
% of Total	100.00%	100.00%
Allowance for loan losses to loans	0.83%	0.85%
Originated | Retail & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 18,611	$ 18,254
Less allowance for loan losses	219	200		132
Loans, net	$ 18,392	$ 18,054
% of Total	1.40%	1.40%
Originated | Commercial Portfolio Segment | Commercial & industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 507,460	$ 488,600
Less allowance for loan losses	4,414	4,192		3,150
Loans, net	$ 503,046	$ 484,408
% of Total	39.20%	39.30%
Originated | Commercial Portfolio Segment | Owner-occupied commercial real estate ("CRE")
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 247,049	$ 237,548
Less allowance for loan losses	$ 2,131	$ 2,115		2,263
% of Total	19.10%	19.10%
Originated | Commercial Portfolio Segment | Agricultural ("AG") production
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 10,515	$ 11,102
Less allowance for loan losses	106	112		122
Loans, net	$ 10,409	$ 10,990
% of Total	0.80%	0.90%
Originated | Commercial Real Estate Portfolio Segment | AG real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 30,014	$ 27,831
Less allowance for loan losses	251	235		222
Loans, net	$ 29,763	$ 27,596
% of Total	2.30%	2.20%
Originated | Commercial Real Estate Portfolio Segment | CRE investment
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 131,426	$ 113,862
Less allowance for loan losses	1,270	1,154		893
Loans, net	$ 130,156	$ 112,708
% of Total	10.20%	9.20%
Originated | Commercial Real Estate Portfolio Segment | Construction & land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 50,348	$ 56,061
Less allowance for loan losses	412	628		656
Loans, net	$ 49,936	$ 55,433
% of Total	3.90%	4.50%
Originated | Residential | Residential construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 29,104	$ 33,615
Less allowance for loan losses	170	200		266
Loans, net	$ 28,934	$ 33,415
% of Total	2.20%	2.70%
Originated | Residential | First mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 202,567	$ 191,186
Less allowance for loan losses	1,317	1,297		1,372
Loans, net	$ 201,250	$ 189,889
% of Total	15.70%	15.40%
Originated | Residential | Junior mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 67,654	$ 65,643
Less allowance for loan losses	409	409		373
Loans, net	$ 67,245	$ 65,234
% of Total	5.20%	5.30%
Acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 805,849	$ 844,223
Less allowance for loan losses	2,066	2,111		2,371
Loans, net	$ 803,783	$ 842,112
% of Total	100.00%	100.00%
Allowance for loan losses to loans	0.26%	0.25%
Acquired | Retail & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 3,912	$ 4,561
Less allowance for loan losses	25	25		20
Loans, net	$ 3,887	$ 4,536
% of Total	0.50%	0.50%
Acquired | Commercial Portfolio Segment | Commercial & industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 142,737	$ 148,737
Less allowance for loan losses	723	742		769
Loans, net	$ 142,014	$ 147,995
% of Total	17.70%	17.60%
Acquired | Commercial Portfolio Segment | Owner-occupied commercial real estate ("CRE")
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 190,623	$ 192,495
Less allowance for loan losses	$ 480	$ 492		604
% of Total	23.70%	22.80%
Acquired | Commercial Portfolio Segment | Agricultural ("AG") production
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 23,226	$ 24,353
Less allowance for loan losses	15	17		28
Loans, net	$ 23,211	$ 24,336
% of Total	2.90%	2.90%
Acquired | Commercial Real Estate Portfolio Segment | AG real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 23,398	$ 23,947
Less allowance for loan losses	61	61		63
Loans, net	$ 23,337	$ 23,886
% of Total	2.90%	2.80%
Acquired | Commercial Real Estate Portfolio Segment | CRE investment
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 191,622	$ 200,601
Less allowance for loan losses	251	234		231
Loans, net	$ 191,371	$ 200,367
% of Total	23.80%	23.80%
Acquired | Commercial Real Estate Portfolio Segment | Construction & land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 27,360	$ 33,599
Less allowance for loan losses	82	98		118
Loans, net	$ 27,278	$ 33,501
% of Total	3.40%	4.00%
Acquired | Residential | Residential construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,971	$ 3,380
Less allowance for loan losses	42	51		38
Loans, net	$ 1,929	$ 3,329
% of Total	0.20%	0.40%
Acquired | Residential | First mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 162,751	$ 172,166
Less allowance for loan losses	311	312		412
Loans, net	$ 162,440	$ 171,854
% of Total	20.20%	20.40%
Acquired | Residential | Junior mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 38,249	$ 40,384
Less allowance for loan losses	76	79		$ 88
Loans, net	$ 38,173	$ 40,305
% of Total	4.70%	4.80%

Loans, Allowance for Loan Los40

Loans, Allowance for Loan Losses, and Credit Quality (Details 1) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Allowance For Loan and Lease Losses [Roll Forward]
Beginning balance	$ 12,653	$ 11,820	$ 11,820
Provision for loan losses	510	450	2,325
Charge-offs	(430)	(111)	(1,604)
Recoveries	32	30	112
Net charge-offs	(398)	(81)	(1,492)
Ending balance	$ 12,765	$ 12,189	$ 12,653

Loans, Allowance for Loan Los41

Loans, Allowance for Loan Losses, and Credit Quality - Summary of changes in ALLL by portfolio segment for periods - Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Allowance for Loan Losses (ALLL):
Beginning balance	$ 12,653	$ 11,820	$ 11,820
Provision	510	450	2,325
Charge-offs	(430)	(111)	(1,604)
Recoveries	32	30	112
Net charge-offs	(398)	(81)	(1,492)
Ending balance	$ 12,765	12,189	$ 12,653
As percent of ALLL	100.00%		100.00%
Retail & other
Allowance for Loan Losses (ALLL):
Beginning balance	$ 225	152	$ 152
Provision	73		127
Charge-offs	(56)		(69)
Recoveries	2		15
Net charge-offs	(54)		(54)
Ending balance	$ 244		$ 225
As percent of ALLL	1.90%		1.80%
Commercial Portfolio Segment | Commercial & industrial
Allowance for Loan Losses (ALLL):
Beginning balance	$ 4,934	3,919	$ 3,919
Provision	545		2,419
Charge-offs	(343)		(1,442)
Recoveries	1		38
Net charge-offs	(342)		(1,404)
Ending balance	$ 5,137		$ 4,934
As percent of ALLL	40.20%		39.00%
Commercial Portfolio Segment | Owner-occupied CRE
Allowance for Loan Losses (ALLL):
Beginning balance	$ 2,607	2,867	$ 2,867
Provision	34		(290)
Charge-offs	(31)		0
Recoveries	1		30
Net charge-offs	(30)		30
Ending balance	$ 2,611		$ 2,607
As percent of ALLL	20.50%		20.60%
Commercial Portfolio Segment | AG Production
Allowance for Loan Losses (ALLL):
Beginning balance	$ 129	150	$ 150
Provision	(8)		(21)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 121		$ 129
As percent of ALLL	0.90%		1.00%
Commercial Real Estate Portfolio Segment | AG real estate
Allowance for Loan Losses (ALLL):
Beginning balance	$ 296	285	$ 285
Provision	16		11
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 312		$ 296
As percent of ALLL	2.40%		2.30%
Commercial Real Estate Portfolio Segment | CRE investment
Allowance for Loan Losses (ALLL):
Beginning balance	$ 1,388	1,124	$ 1,124
Provision	133		263
Charge-offs	0		0
Recoveries	0		1
Net charge-offs	0		1
Ending balance	$ 1,521		$ 1,388
As percent of ALLL	11.90%		11.00%
Commercial Real Estate Portfolio Segment | Construction & land development
Allowance for Loan Losses (ALLL):
Beginning balance	$ 726	774	$ 774
Provision	(232)		(35)
Charge-offs	0		(13)
Recoveries	0		0
Net charge-offs	0		(13)
Ending balance	$ 494		$ 726
As percent of ALLL	3.90%		5.70%
Residential | First mortgage
Allowance for Loan Losses (ALLL):
Beginning balance	$ 1,609	1,784	$ 1,784
Provision	19		(192)
Charge-offs	0		(8)
Recoveries	0		25
Net charge-offs	0		17
Ending balance	$ 1,628		$ 1,609
As percent of ALLL	12.80%		12.70%
Residential | Junior mortgage
Allowance for Loan Losses (ALLL):
Beginning balance	$ 488	461	$ 461
Provision	(31)		96
Charge-offs	0		(72)
Recoveries	28		3
Net charge-offs	28		(69)
Ending balance	$ 485		$ 488
As percent of ALLL	3.80%		3.90%
Residential | Residential construction
Allowance for Loan Losses (ALLL):
Beginning balance	$ 251	304	$ 304
Provision	(39)		(53)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 212		$ 251
As percent of ALLL	1.70%		2.00%
Originated
Allowance for Loan Losses (ALLL):
Beginning balance	$ 10,542	9,449	$ 9,449
Provision	557		2,585
Charge-offs	(430)		(1,537)
Recoveries	30		45
Net charge-offs	(400)		(1,492)
Ending balance	$ 10,699		$ 10,542
As percent of ALLL	100.00%		100.00%
Originated | Retail & other
Allowance for Loan Losses (ALLL):
Beginning balance	$ 200	132	$ 132
Provision	73		122
Charge-offs	(56)		(69)
Recoveries	2		15
Net charge-offs	(54)		(54)
Ending balance	$ 219		$ 200
As percent of ALLL	2.00%		1.80%
Originated | Commercial Portfolio Segment | Commercial & industrial
Allowance for Loan Losses (ALLL):
Beginning balance	$ 4,192	3,150	$ 3,150
Provision	565		2,429
Charge-offs	(343)		(1,388)
Recoveries	0		1
Net charge-offs	(343)		(1,387)
Ending balance	$ 4,414		$ 4,192
As percent of ALLL	41.30%		39.80%
Originated | Commercial Portfolio Segment | Owner-occupied CRE
Allowance for Loan Losses (ALLL):
Beginning balance	$ 2,115	2,263	$ 2,263
Provision	47		(172)
Charge-offs	(31)		0
Recoveries	0		24
Net charge-offs	(31)		24
Ending balance	$ 2,131		$ 2,115
As percent of ALLL	19.90%		20.10%
Originated | Commercial Portfolio Segment | AG Production
Allowance for Loan Losses (ALLL):
Beginning balance	$ 112	122	$ 122
Provision	(6)		(10)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 106		$ 112
As percent of ALLL	1.00%		1.10%
Originated | Commercial Real Estate Portfolio Segment | AG real estate
Allowance for Loan Losses (ALLL):
Beginning balance	$ 235	222	$ 222
Provision	16		13
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 251		$ 235
As percent of ALLL	2.30%		2.20%
Originated | Commercial Real Estate Portfolio Segment | CRE investment
Allowance for Loan Losses (ALLL):
Beginning balance	$ 1,154	893	$ 893
Provision	116		261
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 1,270		$ 1,154
As percent of ALLL	11.90%		10.90%
Originated | Commercial Real Estate Portfolio Segment | Construction & land development
Allowance for Loan Losses (ALLL):
Beginning balance	$ 628	656	$ 656
Provision	(216)		(28)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 412		$ 628
As percent of ALLL	3.90%		6.00%
Originated | Residential | First mortgage
Allowance for Loan Losses (ALLL):
Beginning balance	$ 1,297	1,372	$ 1,372
Provision	20		(69)
Charge-offs	0		(8)
Recoveries	0		2
Net charge-offs	0		(6)
Ending balance	$ 1,317		$ 1,297
As percent of ALLL	12.30%		12.30%
Originated | Residential | Junior mortgage
Allowance for Loan Losses (ALLL):
Beginning balance	$ 409	373	$ 373
Provision	(28)		105
Charge-offs	0		(72)
Recoveries	28		3
Net charge-offs	28		(69)
Ending balance	$ 409		$ 409
As percent of ALLL	3.80%		3.90%
Originated | Residential | Residential construction
Allowance for Loan Losses (ALLL):
Beginning balance	$ 200	266	$ 266
Provision	(30)		(66)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 170		$ 200
As percent of ALLL	1.60%		1.90%
Acquired
Allowance for Loan Losses (ALLL):
Beginning balance	$ 2,111	2,371	$ 2,371
Provision	(47)		(260)
Charge-offs	0		(67)
Recoveries	2		67
Net charge-offs	2		0
Ending balance	$ 2,066		$ 2,111
As percent of ALLL	100.00%		100.00%
Acquired | Retail & other
Allowance for Loan Losses (ALLL):
Beginning balance	$ 25	20	$ 20
Provision	0		5
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 25		$ 25
As percent of ALLL	1.20%		1.30%
Acquired | Commercial Portfolio Segment | Commercial & industrial
Allowance for Loan Losses (ALLL):
Beginning balance	$ 742	769	$ 769
Provision	(20)		(10)
Charge-offs	0		(54)
Recoveries	1		37
Net charge-offs	1		(17)
Ending balance	$ 723		$ 742
As percent of ALLL	35.00%		35.10%
Acquired | Commercial Portfolio Segment | Owner-occupied CRE
Allowance for Loan Losses (ALLL):
Beginning balance	$ 492	604	$ 604
Provision	(13)		(118)
Charge-offs	0		0
Recoveries	1		6
Net charge-offs	1		6
Ending balance	$ 480		$ 492
As percent of ALLL	23.20%		23.30%
Acquired | Commercial Portfolio Segment | AG Production
Allowance for Loan Losses (ALLL):
Beginning balance	$ 17	28	$ 28
Provision	(2)		(11)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 15		$ 17
As percent of ALLL	0.70%		0.80%
Acquired | Commercial Real Estate Portfolio Segment | AG real estate
Allowance for Loan Losses (ALLL):
Beginning balance	$ 61	63	$ 63
Provision	0		(2)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 61		$ 61
As percent of ALLL	3.00%		2.90%
Acquired | Commercial Real Estate Portfolio Segment | CRE investment
Allowance for Loan Losses (ALLL):
Beginning balance	$ 234	231	$ 231
Provision	17		2
Charge-offs	0		0
Recoveries	0		1
Net charge-offs	0		1
Ending balance	$ 251		$ 234
As percent of ALLL	12.10%		11.10%
Acquired | Commercial Real Estate Portfolio Segment | Construction & land development
Allowance for Loan Losses (ALLL):
Beginning balance	$ 98	118	$ 118
Provision	(16)		(7)
Charge-offs	0		(13)
Recoveries	0		0
Net charge-offs	0		(13)
Ending balance	$ 82		$ 98
As percent of ALLL	4.00%		4.60%
Acquired | Residential | First mortgage
Allowance for Loan Losses (ALLL):
Beginning balance	$ 312	412	$ 412
Provision	(1)		(123)
Charge-offs	0		0
Recoveries	0		23
Net charge-offs	0		23
Ending balance	$ 311		$ 312
As percent of ALLL	15.10%		14.80%
Acquired | Residential | Junior mortgage
Allowance for Loan Losses (ALLL):
Beginning balance	$ 79	88	$ 88
Provision	(3)		(9)
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 76		$ 79
As percent of ALLL	3.70%		3.70%
Acquired | Residential | Residential construction
Allowance for Loan Losses (ALLL):
Beginning balance	$ 51	$ 38	$ 38
Provision	(9)		13
Charge-offs	0		0
Recoveries	0		0
Net charge-offs	0		0
Ending balance	$ 42		$ 51
As percent of ALLL	2.00%		2.40%

Loans, Allowance for Loan Los42

Loans, Allowance for Loan Losses, and Credit Quality - Summary of changes in ALLL by portfolio segment - As percent of ALLL (Details 3) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
ALLL:
Individually evaluated	$ 150	$ 163
Collectively evaluated	12,615	12,490
Ending balance	12,765	12,653	$ 12,189	$ 11,820
Loans:
Individually evaluated	15,480	17,221
Collectively evaluated	2,085,117	2,070,704
Total loans	2,100,597	2,087,925
Less ALLL	12,765	12,653	$ 12,189	11,820
Net loans	2,087,832	2,075,272
Retail & other
ALLL:
Individually evaluated	0	0
Collectively evaluated	244	225
Ending balance	244	225		152
Loans:
Individually evaluated	12	12
Collectively evaluated	22,511	22,803
Total loans	22,523	22,815
Less ALLL	244	225		152
Net loans	22,279	22,590
Commercial Portfolio Segment | Commercial & industrial
ALLL:
Individually evaluated	115	163
Collectively evaluated	5,022	4,771
Ending balance	5,137	4,934		3,919
Loans:
Individually evaluated	6,273	5,870
Collectively evaluated	643,924	631,467
Total loans	650,197	637,337
Less ALLL	5,137	4,934		3,919
Net loans	645,060	632,403
Commercial Portfolio Segment | Owner-occupied CRE
ALLL:
Individually evaluated	0	0
Collectively evaluated	2,611	2,607
Ending balance	2,611	2,607
Loans:
Individually evaluated	1,886	1,689
Collectively evaluated	435,786	428,354
Total loans	437,672	430,043
Less ALLL	2,611	2,607
Net loans	435,061	427,436
Commercial Portfolio Segment | AG Production
ALLL:
Individually evaluated	0	0
Collectively evaluated	121	129
Ending balance	121	129		150
Loans:
Individually evaluated	0	0
Collectively evaluated	33,741	35,455
Total loans	33,741	35,455
Less ALLL	121	129		150
Net loans	33,620	35,326
Commercial Real Estate Portfolio Segment | AG real estate
ALLL:
Individually evaluated	0	0
Collectively evaluated	312	296
Ending balance	312	296		285
Loans:
Individually evaluated	235	248
Collectively evaluated	53,177	51,530
Total loans	53,412	51,778
Less ALLL	312	296		285
Net loans	53,100	51,482
Commercial Real Estate Portfolio Segment | CRE investment
ALLL:
Individually evaluated	35	0
Collectively evaluated	1,486	1,388
Ending balance	1,521	1,388		1,124
Loans:
Individually evaluated	2,798	5,290
Collectively evaluated	320,250	309,173
Total loans	323,048	314,463
Less ALLL	1,521	1,388		1,124
Net loans	321,527	313,075
Commercial Real Estate Portfolio Segment | Construction & land development
ALLL:
Individually evaluated	0	0
Collectively evaluated	494	726
Ending balance	494	726		774
Loans:
Individually evaluated	1,049	1,053
Collectively evaluated	76,659	88,607
Total loans	77,708	89,660
Less ALLL	494	726		774
Net loans	77,214	88,934
Residential | First mortgage
ALLL:
Individually evaluated	0	0
Collectively evaluated	1,628	1,609
Ending balance	1,628	1,609		1,784
Loans:
Individually evaluated	3,060	2,801
Collectively evaluated	362,258	360,551
Total loans	365,318	363,352
Less ALLL	1,628	1,609		1,784
Net loans	363,690	361,743
Residential | Junior mortgage
ALLL:
Individually evaluated	0	0
Collectively evaluated	485	488
Ending balance	485	488		461
Loans:
Individually evaluated	87	178
Collectively evaluated	105,816	105,849
Total loans	105,903	106,027
Less ALLL	485	488		461
Net loans	105,418	105,539
Residential | Residential construction
ALLL:
Individually evaluated	0	0
Collectively evaluated	212	251
Ending balance	212	251		304
Loans:
Individually evaluated	80	80
Collectively evaluated	30,995	36,915
Total loans	31,075	36,995
Less ALLL	212	251		304
Net loans	30,863	36,744
Originated
ALLL:
Individually evaluated	150	163
Collectively evaluated	10,549	10,379
Ending balance	10,699	10,542		9,449
Loans:
Individually evaluated	5,062	3,003
Collectively evaluated	1,289,686	1,240,699
Total loans	1,294,748	1,243,702
Less ALLL	10,699	10,542		9,449
Net loans	1,284,049	1,233,160
Originated | Retail & other
ALLL:
Individually evaluated	0	0
Collectively evaluated	219	200
Ending balance	219	200		132
Loans:
Individually evaluated	0	0
Collectively evaluated	18,611	18,254
Total loans	18,611	18,254
Less ALLL	219	200		132
Net loans	18,392	18,054
Originated | Commercial Portfolio Segment | Commercial & industrial
ALLL:
Individually evaluated	115	163
Collectively evaluated	4,299	4,029
Ending balance	4,414	4,192		3,150
Loans:
Individually evaluated	2,686	2,189
Collectively evaluated	504,774	486,411
Total loans	507,460	488,600
Less ALLL	4,414	4,192		3,150
Net loans	503,046	484,408
Originated | Commercial Portfolio Segment | Owner-occupied CRE
ALLL:
Individually evaluated	0	0
Collectively evaluated	2,131	2,115
Ending balance	2,131	2,115
Loans:
Individually evaluated	343	0
Collectively evaluated	246,706	237,548
Total loans	247,049	237,548
Less ALLL	2,131	2,115
Net loans	244,918	235,433
Originated | Commercial Portfolio Segment | AG Production
ALLL:
Individually evaluated	0	0
Collectively evaluated	106	112
Ending balance	106	112		122
Loans:
Individually evaluated	0	0
Collectively evaluated	10,515	11,102
Total loans	10,515	11,102
Less ALLL	106	112		122
Net loans	10,409	10,990
Originated | Commercial Real Estate Portfolio Segment | AG real estate
ALLL:
Individually evaluated	0	0
Collectively evaluated	251	235
Ending balance	251	235		222
Loans:
Individually evaluated	0	0
Collectively evaluated	30,014	27,831
Total loans	30,014	27,831
Less ALLL	251	235		222
Net loans	29,763	27,596
Originated | Commercial Real Estate Portfolio Segment | CRE investment
ALLL:
Individually evaluated	35	0
Collectively evaluated	1,235	1,154
Ending balance	1,270	1,154		893
Loans:
Individually evaluated	1,522	549
Collectively evaluated	129,904	113,313
Total loans	131,426	113,862
Less ALLL	1,270	1,154		893
Net loans	130,156	112,708
Originated | Commercial Real Estate Portfolio Segment | Construction & land development
ALLL:
Individually evaluated	0	0
Collectively evaluated	412	628
Ending balance	412	628		656
Loans:
Individually evaluated	0	0
Collectively evaluated	50,348	56,061
Total loans	50,348	56,061
Less ALLL	412	628		656
Net loans	49,936	55,433
Originated | Residential | First mortgage
ALLL:
Individually evaluated	0	0
Collectively evaluated	1,317	1,297
Ending balance	1,317	1,297		1,372
Loans:
Individually evaluated	511	253
Collectively evaluated	202,056	190,933
Total loans	202,567	191,186
Less ALLL	1,317	1,297		1,372
Net loans	201,250	189,889
Originated | Residential | Junior mortgage
ALLL:
Individually evaluated	0	0
Collectively evaluated	409	409
Ending balance	409	409		373
Loans:
Individually evaluated	0	12
Collectively evaluated	67,654	65,631
Total loans	67,654	65,643
Less ALLL	409	409		373
Net loans	67,245	65,234
Originated | Residential | Residential construction
ALLL:
Individually evaluated	0	0
Collectively evaluated	170	200
Ending balance	170	200		266
Loans:
Individually evaluated	0	0
Collectively evaluated	29,104	33,615
Total loans	29,104	33,615
Less ALLL	170	200		266
Net loans	28,934	33,415
Acquired
ALLL:
Individually evaluated	0	0
Collectively evaluated	2,066	2,111
Ending balance	2,066	2,111		2,371
Loans:
Individually evaluated	10,418	14,218
Collectively evaluated	795,431	830,005
Total loans	805,849	844,223
Less ALLL	2,066	2,111		2,371
Net loans	803,783	842,112
Acquired | Retail & other
ALLL:
Individually evaluated	0	0
Collectively evaluated	25	25
Ending balance	25	25		20
Loans:
Individually evaluated	12	12
Collectively evaluated	3,900	4,549
Total loans	3,912	4,561
Less ALLL	25	25		20
Net loans	3,887	4,536
Acquired | Commercial Portfolio Segment | Commercial & industrial
ALLL:
Individually evaluated	0	0
Collectively evaluated	723	742
Ending balance	723	742		769
Loans:
Individually evaluated	3,587	3,681
Collectively evaluated	139,150	145,056
Total loans	142,737	148,737
Less ALLL	723	742		769
Net loans	142,014	147,995
Acquired | Commercial Portfolio Segment | Owner-occupied CRE
ALLL:
Individually evaluated	0	0
Collectively evaluated	480	492
Ending balance	480	492
Loans:
Individually evaluated	1,543	1,689
Collectively evaluated	189,080	190,806
Total loans	190,623	192,495
Less ALLL	480	492
Net loans	190,143	192,003
Acquired | Commercial Portfolio Segment | AG Production
ALLL:
Individually evaluated	0	0
Collectively evaluated	15	17
Ending balance	15	17		28
Loans:
Individually evaluated	0	0
Collectively evaluated	23,226	24,353
Total loans	23,226	24,353
Less ALLL	15	17		28
Net loans	23,211	24,336
Acquired | Commercial Real Estate Portfolio Segment | AG real estate
ALLL:
Individually evaluated	0	0
Collectively evaluated	61	61
Ending balance	61	61		63
Loans:
Individually evaluated	235	248
Collectively evaluated	23,163	23,699
Total loans	23,398	23,947
Less ALLL	61	61		63
Net loans	23,337	23,886
Acquired | Commercial Real Estate Portfolio Segment | CRE investment
ALLL:
Individually evaluated	0	0
Collectively evaluated	251	234
Ending balance	251	234		231
Loans:
Individually evaluated	1,276	4,741
Collectively evaluated	190,346	195,860
Total loans	191,622	200,601
Less ALLL	251	234		231
Net loans	191,371	200,367
Acquired | Commercial Real Estate Portfolio Segment | Construction & land development
ALLL:
Individually evaluated	0	0
Collectively evaluated	82	98
Ending balance	82	98		118
Loans:
Individually evaluated	1,049	1,053
Collectively evaluated	26,311	32,546
Total loans	27,360	33,599
Less ALLL	82	98		118
Net loans	27,278	33,501
Acquired | Residential | First mortgage
ALLL:
Individually evaluated	0	0
Collectively evaluated	311	312
Ending balance	311	312		412
Loans:
Individually evaluated	2,549	2,548
Collectively evaluated	160,202	169,618
Total loans	162,751	172,166
Less ALLL	311	312		412
Net loans	162,440	171,854
Acquired | Residential | Junior mortgage
ALLL:
Individually evaluated	0	0
Collectively evaluated	76	79
Ending balance	76	79		88
Loans:
Individually evaluated	87	166
Collectively evaluated	38,162	40,218
Total loans	38,249	40,384
Less ALLL	76	79		88
Net loans	38,173	40,305
Acquired | Residential | Residential construction
ALLL:
Individually evaluated	0	0
Collectively evaluated	42	51
Ending balance	42	51		38
Loans:
Individually evaluated	80	80
Collectively evaluated	1,891	3,300
Total loans	1,971	3,380
Less ALLL	42	51		$ 38
Net loans	$ 1,929	$ 3,329

Loans, Allowance for Loan Los43

Loans, Allowance for Loan Losses, and Credit Quality - Nonaccrual loans by portfolio segment (Details 4) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 11,661	$ 13,095
% to Non Accrual Total	100.00%	100.00%
Percent of total loans	0.60%	0.60%
Retail & other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 4
% to Non Accrual Total	0.00%	0.00%
Commercial Portfolio Segment | Commercial & industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 6,434	$ 6,016
% to Non Accrual Total	55.20%	46.00%
Commercial Portfolio Segment | Owner-occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 744	$ 533
% to Non Accrual Total	6.40%	4.10%
Commercial Portfolio Segment | AG Production
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Commercial Real Estate Portfolio Segment | AG real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 175	$ 186
% to Non Accrual Total	1.50%	1.40%
Commercial Real Estate Portfolio Segment | CRE investment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 2,105	$ 4,531
% to Non Accrual Total	18.10%	34.60%
Commercial Real Estate Portfolio Segment | Construction & land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Residential | First mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 1,883	$ 1,587
% to Non Accrual Total	16.10%	12.10%
Residential | Junior mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 212	$ 158
% to Non Accrual Total	1.80%	1.20%
Residential | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 108	$ 80
% to Non Accrual Total	0.90%	0.60%
Originated
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 5,447	$ 3,278
% to Non Accrual Total	100.00%	100.00%
Originated | Retail & other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 4
% to Non Accrual Total	0.00%	0.10%
Originated | Commercial Portfolio Segment | Commercial & industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 2,814	$ 2,296
% to Non Accrual Total	51.70%	70.00%
Originated | Commercial Portfolio Segment | Owner-occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 411	$ 86
% to Non Accrual Total	7.50%	2.60%
Originated | Commercial Portfolio Segment | AG Production
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Originated | Commercial Real Estate Portfolio Segment | AG real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Originated | Commercial Real Estate Portfolio Segment | CRE investment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 1,522	$ 549
% to Non Accrual Total	28.00%	16.80%
Originated | Commercial Real Estate Portfolio Segment | Construction & land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Originated | Residential | First mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 672	$ 331
% to Non Accrual Total	12.30%	10.10%
Originated | Residential | Junior mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 12
% to Non Accrual Total	0.00%	0.40%
Originated | Residential | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 28	$ 0
% to Non Accrual Total	0.50%	0.00%
Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 6,214	$ 9,817
% to Non Accrual Total	100.00%	100.00%
Acquired | Retail & other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Acquired | Commercial Portfolio Segment | Commercial & industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 3,620	$ 3,720
% to Non Accrual Total	58.30%	37.90%
Acquired | Commercial Portfolio Segment | Owner-occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 333	$ 447
% to Non Accrual Total	5.40%	4.60%
Acquired | Commercial Portfolio Segment | AG Production
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Acquired | Commercial Real Estate Portfolio Segment | AG real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 175	$ 186
% to Non Accrual Total	2.80%	1.90%
Acquired | Commercial Real Estate Portfolio Segment | CRE investment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 583	$ 3,982
% to Non Accrual Total	9.30%	40.60%
Acquired | Commercial Real Estate Portfolio Segment | Construction & land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 0	$ 0
% to Non Accrual Total	0.00%	0.00%
Acquired | Residential | First mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 1,211	$ 1,256
% to Non Accrual Total	19.50%	12.80%
Acquired | Residential | Junior mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 212	$ 146
% to Non Accrual Total	3.40%	1.40%
Acquired | Residential | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 80	$ 80
% to Non Accrual Total	1.30%	0.80%

Loans, Allowance for Loan Los44

Loans, Allowance for Loan Losses, and Credit Quality - Summary of loans by past due status (Details 5) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,086,572	$ 2,072,198
Total loans	$ 2,100,597	$ 2,087,925
As a percent of current loans	99.30%	99.30%
As a percent of total loans	100.00%	100.00%
30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	$ 2,364	$ 2,632
Financing receivable, percent past due	0.10%	0.10%
90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	$ 11,661	$ 13,095
Financing receivable, percent past due	0.60%	0.60%
Retail & other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 22,396	$ 22,807
Total loans	22,523	22,815
Retail & other | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	127	4
Retail & other | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	4
Commercial Portfolio Segment | Commercial & industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	643,293	631,110
Total loans	650,197	637,337
Commercial Portfolio Segment | Commercial & industrial | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	470	211
Commercial Portfolio Segment | Commercial & industrial | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	6,434	6,016
Commercial Portfolio Segment | Owner-occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	436,928	428,839
Total loans	437,672	430,043
Commercial Portfolio Segment | Owner-occupied CRE | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	671
Commercial Portfolio Segment | Owner-occupied CRE | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	744	533
Commercial Portfolio Segment | AG Production
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	33,741	35,425
Total loans	33,741	35,455
Commercial Portfolio Segment | AG Production | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	30
Commercial Portfolio Segment | AG Production | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	0
Commercial Real Estate Portfolio Segment | AG real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	53,237	51,592
Total loans	53,412	51,778
Commercial Real Estate Portfolio Segment | AG real estate | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	0
Commercial Real Estate Portfolio Segment | AG real estate | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	175	186
Commercial Real Estate Portfolio Segment | CRE investment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	320,943	309,932
Total loans	323,048	314,463
Commercial Real Estate Portfolio Segment | CRE investment | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	0
Commercial Real Estate Portfolio Segment | CRE investment | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	2,105	4,531
Commercial Real Estate Portfolio Segment | Construction & land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	77,271	89,584
Total loans	77,708	89,660
Commercial Real Estate Portfolio Segment | Construction & land development | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	437	76
Commercial Real Estate Portfolio Segment | Construction & land development | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	0
Residential | First mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	362,177	360,726
Total loans	365,318	363,352
Residential | First mortgage | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	1,258	1,039
Residential | First mortgage | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	1,883	1,587
Residential | Junior mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	105,619	105,855
Total loans	105,903	106,027
Residential | Junior mortgage | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	72	14
Residential | Junior mortgage | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	212	158
Residential | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	30,967	36,328
Total loans	31,075	36,995
Residential | Residential construction | 30-89 Days Past Due (accruing)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	0	587
Residential | Residential construction | 90 Days & Over or non-accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due loans	$ 108	$ 80

Loans, Allowance for Loan Los45

Loans, Allowance for Loan Losses, and Credit Quality - Summary of loans by credit quality indicator based on internally assigned credit grade (Details 6) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 2,100,597	$ 2,087,925
As a percent of total loans	100.00%	100.00%
Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,990,090	$ 1,979,429
As a percent of total loans	94.70%	94.80%
Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 64,248	$ 58,354
As a percent of total loans	3.10%	2.80%
Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 21,790	$ 23,461
As a percent of total loans	1.00%	1.10%
Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 24,469	$ 26,681
As a percent of total loans	1.20%	1.30%
Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0
As a percent of total loans	0.00%	0.00%
Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0
As a percent of total loans	0.00%	0.00%
Retail & other
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 22,523	$ 22,815
Retail & other | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,523	22,811
Retail & other | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Retail & other | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Retail & other | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	4
Retail & other | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Retail & other | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | Commercial & industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	650,197	637,337
Commercial Portfolio Segment | Commercial & industrial | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	610,654	597,854
Commercial Portfolio Segment | Commercial & industrial | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	18,692	12,999
Commercial Portfolio Segment | Commercial & industrial | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,621	16,129
Commercial Portfolio Segment | Commercial & industrial | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,230	10,355
Commercial Portfolio Segment | Commercial & industrial | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | Commercial & industrial | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | Owner-occupied CRE
Financing Receivable, Recorded Investment [Line Items]
Total loans	437,672	430,043
Commercial Portfolio Segment | Owner-occupied CRE | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	399,911	397,357
Commercial Portfolio Segment | Owner-occupied CRE | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	28,718	23,340
Commercial Portfolio Segment | Owner-occupied CRE | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,566	6,442
Commercial Portfolio Segment | Owner-occupied CRE | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,477	2,904
Commercial Portfolio Segment | Owner-occupied CRE | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | Owner-occupied CRE | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | AG Production
Financing Receivable, Recorded Investment [Line Items]
Total loans	33,741	35,455
Commercial Portfolio Segment | AG Production | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	28,348	30,431
Commercial Portfolio Segment | AG Production | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,342	4,000
Commercial Portfolio Segment | AG Production | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,383	0
Commercial Portfolio Segment | AG Production | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,668	1,024
Commercial Portfolio Segment | AG Production | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | AG Production | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate Portfolio Segment | AG real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	53,412	51,778
Commercial Real Estate Portfolio Segment | AG real estate | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	45,924	44,321
Commercial Real Estate Portfolio Segment | AG real estate | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,645	4,873
Commercial Real Estate Portfolio Segment | AG real estate | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,316	0
Commercial Real Estate Portfolio Segment | AG real estate | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,527	2,584
Commercial Real Estate Portfolio Segment | AG real estate | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate Portfolio Segment | AG real estate | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate Portfolio Segment | CRE investment
Financing Receivable, Recorded Investment [Line Items]
Total loans	323,048	314,463
Commercial Real Estate Portfolio Segment | CRE investment | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	312,103	299,926
Commercial Real Estate Portfolio Segment | CRE investment | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,220	8,399
Commercial Real Estate Portfolio Segment | CRE investment | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,215	190
Commercial Real Estate Portfolio Segment | CRE investment | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,510	5,948
Commercial Real Estate Portfolio Segment | CRE investment | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate Portfolio Segment | CRE investment | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate Portfolio Segment | Construction & land development
Financing Receivable, Recorded Investment [Line Items]
Total loans	77,708	89,660
Commercial Real Estate Portfolio Segment | Construction & land development | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	73,832	86,011
Commercial Real Estate Portfolio Segment | Construction & land development | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,092	2,758
Commercial Real Estate Portfolio Segment | Construction & land development | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	17	17
Commercial Real Estate Portfolio Segment | Construction & land development | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	767	874
Commercial Real Estate Portfolio Segment | Construction & land development | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate Portfolio Segment | Construction & land development | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | First mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans	365,318	363,352
Residential | First mortgage | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	360,169	358,067
Residential | First mortgage | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,522	1,868
Residential | First mortgage | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	672	683
Residential | First mortgage | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,955	2,734
Residential | First mortgage | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | First mortgage | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Junior mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans	105,903	106,027
Residential | Junior mortgage | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	105,659	105,736
Residential | Junior mortgage | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	17	117
Residential | Junior mortgage | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Junior mortgage | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	227	174
Residential | Junior mortgage | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Junior mortgage | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Residential construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	31,075	36,995
Residential | Residential construction | Grades 1-4
Financing Receivable, Recorded Investment [Line Items]
Total loans	30,967	36,915
Residential | Residential construction | Grade 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Residential construction | Grade 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Residential construction | Grade 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	108	80
Residential | Residential construction | Grade 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Residential | Residential construction | Grade 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0

Loans, Allowance for Loan Los46

Loans, Allowance for Loan Losses, and Credit Quality - Summary of information pertaining to impaired loans (Details 7) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	$ 15,480	$ 17,221
Total: Unpaid Principal Balance	23,600	26,948
Related Allowance	150	163
Average Recorded Investment	15,789	16,810
Interest Income Recognized	423	1,623
Retail & other
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	12	12
Total: Unpaid Principal Balance	14	14
Related Allowance	0	0
Average Recorded Investment	12	12
Interest Income Recognized	0	1
Commercial Portfolio Segment | Commercial & industrial
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	6,273	5,870
Total: Unpaid Principal Balance	10,457	10,063
Related Allowance	115	163
Average Recorded Investment	6,535	6,586
Interest Income Recognized	164	718
Commercial Portfolio Segment | Owner-occupied CRE
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	1,886	1,689
Total: Unpaid Principal Balance	2,397	2,256
Related Allowance	0	0
Average Recorded Investment	1,908	1,333
Interest Income Recognized	45	132
Commercial Portfolio Segment | AG Production
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	0	0
Total: Unpaid Principal Balance	9	10
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Commercial Real Estate Portfolio Segment | AG real estate
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	235	248
Total: Unpaid Principal Balance	295	307
Related Allowance	0	0
Average Recorded Investment	242	233
Interest Income Recognized	12	26
Commercial Real Estate Portfolio Segment | CRE investment
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	2,798	5,290
Total: Unpaid Principal Balance	4,142	8,102
Related Allowance	35	0
Average Recorded Investment	2,811	5,411
Interest Income Recognized	128	465
Commercial Real Estate Portfolio Segment | Construction & land development
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	1,049	1,053
Total: Unpaid Principal Balance	1,049	1,053
Related Allowance	0	0
Average Recorded Investment	1,051	813
Interest Income Recognized	12	57
Residential | First mortgage
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	3,060	2,801
Total: Unpaid Principal Balance	3,847	3,653
Related Allowance	0	0
Average Recorded Investment	3,062	2,177
Interest Income Recognized	55	180
Residential | Junior mortgage
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	87	178
Total: Unpaid Principal Balance	407	507
Related Allowance	0	0
Average Recorded Investment	88	154
Interest Income Recognized	7	17
Residential | Residential construction
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	80	80
Total: Unpaid Principal Balance	983	983
Related Allowance	0	0
Average Recorded Investment	80	91
Interest Income Recognized	0	27
Originated
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	5,062	3,003
Total: Unpaid Principal Balance	5,062	3,003
Related Allowance	150	163
Average Recorded Investment	5,283	2,964
Interest Income Recognized	74	241
Acquired
Financing Receivable, Impaired [Line Items]
Total: Recorded Investment	10,418	14,218
Total: Unpaid Principal Balance	18,538	23,945
Related Allowance	0	0
Average Recorded Investment	10,506	13,846
Interest Income Recognized	$ 349	$ 1,382

Loans, Allowance for Loan Los47

Loans, Allowance for Loan Losses, and Credit Quality (Details 8) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accretion Discount [Roll Forward]
Balance at beginning of period	$ 9,471	$ 14,327	$ 14,327
Acquired balance, net	0	0	8,352
Accretion to loan interest income	(1,544)	(2,160)	(7,995)
Transferred to accretable	(55)	0	(1,936)
Disposals of loans	0	(242)	(3,277)
Balance at end of period	$ 7,872	$ 11,925	$ 9,471

Loans, Allowance for Loan Los48

Loans, Allowance for Loan Losses, and Credit Quality (Detail Textuals) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)Loan	Dec. 31, 2017USD ($)Loan
Loans and Leases Receivable Disclosure [Line Items]
Number of loans classified as troubled debt restructuring | Loan	7	8
Current outstanding balance	$ 2,100	$ 5,600
Pre-modification balance	3,400	$ 6,900
First Menasha merger | Acquired
Loans and Leases Receivable Disclosure [Line Items]
PCI loans acquired fair value	43,600
Nonaccretable mark	34,400
Accretable mark	0
Amount remain in impaired loans from total purchased credit impaired loans	$ 10,400

Goodwill and Other Intangible49

Goodwill and Other Intangibles and Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 107,366	$ 107,366
Goodwill and other intangibles, net	127,224	128,406
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Other intangibles	15,407	16,477
Customer list intangibles
Finite-Lived Intangible Assets [Line Items]
Other intangibles	4,451	4,563
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Other intangibles	$ 19,858	$ 21,040

Goodwill and Other Intangible50

Goodwill and Other Intangibles and Mortgage Servicing Rights (Details 1) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization during the period	$ 1,182	$ 1,163
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	29,015		$ 29,015
Accumulated amortization	(13,608)		(12,538)
Total	15,407		16,477
Additions during the period	0		3,670
Amortization during the period	1,070		4,294
Customer list intangibles
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	5,233		5,233
Accumulated amortization	(782)		(670)
Total	4,451		4,563
Additions during the period	0		870
Amortization during the period	$ 112		$ 401

Goodwill and Other Intangible51

Goodwill and Other Intangibles and Mortgage Servicing Rights (Details 2) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Mortgage servicing rights (MSR) asset:
MSR asset at beginning of year	$ 3,187	$ 1,922
Capitalized MSR	103	876
MSR asset acquired	0	874
Amortization during the period	(150)	(485)
MSR asset at end of period	3,140	3,187
Fair value of MSR asset at end of period	4,039	4,097
Residential mortgage loans serviced for others	$ 515,263	$ 518,419
Net book value of MSR asset to loans serviced for others	0.61%	0.61%

Goodwill and Other Intangible52

Goodwill and Other Intangibles and Mortgage Servicing Rights (Details 3) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
2018 (remaining nine months)	$ 2,845
2,019	3,337
2,020	2,657
2,021	2,167
2,022	1,735
Thereafter	2,666
Total	15,407	$ 16,477
Customer list intangibles
Finite-Lived Intangible Assets [Line Items]
2018 (remaining nine months)	337
2,019	449
2,020	449
2,021	449
2,022	449
Thereafter	2,318
Total	4,451	$ 4,563
MSR asset
Finite-Lived Intangible Assets [Line Items]
2018 (remaining nine months)	434
2,019	578
2,020	728
2,021	326
2,022	326
Thereafter	748
Total	$ 3,140

Goodwill and Other Intangible53

Goodwill and Other Intangibles and Mortgage Servicing Rights (Detail Textuals) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 107,366	$ 107,366

Short and Long-Term Borrowing54

Short and Long-Term Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term borrowings	$ 77,112	$ 78,046
FHLB advances
Debt Instrument [Line Items]
Long-term borrowings	35,445	36,509
Junior subordinated debentures
Debt Instrument [Line Items]
Long-term borrowings	29,736	29,616
Subordinated notes
Debt Instrument [Line Items]
Long-term borrowings	$ 11,931	$ 11,921

Short and Long-Term Borrowing55

Short and Long-Term Borrowings (Details 1) $ in Thousands	Mar. 31, 2018USD ($)
Debt Disclosure [Abstract]
2018 (remaining nine months)	$ 17
2,019	0
2,020	10,000
2,021	0
2,022	25,428
Total advances from Federal Home Loan Banks	$ 35,445

Short and Long-Term Borrowing56

Short and Long-Term Borrowings (Details 2) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Par		$ 38,249
Unamortized Discount		(8,513)
Carrying Value		$ 29,736	$ 29,616
2004 Nicolet Bankshares Statutory Trust
Debt Instrument [Line Items]
Maturity Date	[1]	Jul. 15, 2034
Par	[1]	$ 6,186
Unamortized Discount	[1]	0
Carrying Value	[1]	$ 6,186	6,186
2005 Mid-Wisconsin Financial Services, Inc.
Debt Instrument [Line Items]
Maturity Date	[2]	Dec. 15, 2035
Par	[2]	$ 10,310
Unamortized Discount	[2]	(3,521)
Carrying Value	[2]	$ 6,789	6,739
2006 Baylake Corp.
Debt Instrument [Line Items]
Maturity Date	[3]	Sep. 30, 2036
Par	[3]	$ 16,598
Unamortized Discount	[3]	(4,297)
Carrying Value	[3]	$ 12,301	12,242
2004 First Menasha Bancshares, Inc.
Debt Instrument [Line Items]
Maturity Date	[4]	Mar. 17, 2034
Par	[4]	$ 5,155
Unamortized Discount	[4]	(695)
Carrying Value	[4]	$ 4,460	$ 4,449
[1]	The interest rate is 8.00% fixed.
[2]	The debentures, assumed in April 2013 as the result of an acquisition, have a floating rate of the three-month LIBOR plus 1.43%, adjusted quarterly. The interest rates were 3.55% and 3.02% as of March 31, 2018 and December 31, 2017, respectively.
[3]	The debentures, assumed in April 2016 as a result of an acquisition, have a floating rate of the three-month LIBOR plus 1.35%, adjusted quarterly. The interest rates were 3.66% and 3.04% as of March 31, 2018 and December 31, 2017, respectively.
[4]	The debentures, assumed in April 2017 as the result of an acquisition, have a floating rate of the three-month LIBOR plus 2.79%, adjusted quarterly. The interest rate was 4.98% and 4.39% as of March 31, 2018 and December 31, 2017, respectively.

Short and Long-Term Borrowing57

Short and Long-Term Borrowings (Parentheticals) (Details 2)	1 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2013	Mar. 31, 2018	Dec. 31, 2017
2004 Nicolet Bankshares Statutory Trust
Debt Instrument [Line Items]
Fixed rate on notes secured by building				8.00%
2005 Mid-Wisconsin Financial Services, Inc.
Debt Instrument [Line Items]
Base rate, description			three-month LIBOR plus 1.43%
Fixed rate on notes secured by building				3.55%	3.02%
2006 Baylake Corp.
Debt Instrument [Line Items]
Base rate, description		three-month LIBOR plus 1.35%
Fixed rate on notes secured by building				3.66%	3.04%
2004 First Menasha Bancshares, Inc.
Debt Instrument [Line Items]
Base rate, description	three-month LIBOR plus 2.79%
Fixed rate on notes secured by building				4.98%	4.39%

Short and Long-Term Borrowing58

Short and Long-Term Borrowings (Detail Textuals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Principal amount of subordinated notes		$ 38,249
FHLB advances
Debt Instrument [Line Items]
Weighted average rate of FHLB advances		1.72%	1.71%
Subordinated Notes
Debt Instrument [Line Items]
Principal amount of subordinated notes	$ 12,000
Subordinated notes, maturity period	10 years
Fixed rate on notes secured by building	5.00%
Subordinated notes		$ 11,900	$ 11,900

Fair Value Measurements - Measu

Fair Value Measurements - Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		$ 401,130	$ 405,153
Other investments (equity securities)		2,500
Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		401,130	405,153
Total | Fair Value Measurements Using Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	2,571
Total | Fair Value Measurements Using Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		392,535	393,431
Total | Fair Value Measurements Using Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		8,595	9,151
Recurring basis fair value measurements | Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		401,130	405,153
Recurring basis fair value measurements | Total | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		26,185	26,209
Recurring basis fair value measurements | Total | State, county and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		175,909	184,044
Recurring basis fair value measurements | Total | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		151,123	155,532
Recurring basis fair value measurements | Total | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		47,913	36,797
Recurring basis fair value measurements | Total | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	[1]		2,571
Other investments (equity securities)	[1]	2,546
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	2,571
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 1 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	0
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 1 | State, county and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	0
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 1 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	0
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 1 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	0
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	[1]		2,571
Other investments (equity securities)	[1]	2,546
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		392,535	393,431
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 2 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		26,185	26,209
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 2 | State, county and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		175,778	183,386
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 2 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		151,123	155,529
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		39,449	28,307
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	[1]		0
Other investments (equity securities)	[1]	0
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		8,595	9,151
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 3 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	0
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 3 | State, county and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		131	658
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 3 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		0	3
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 3 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		8,464	8,490
Recurring basis fair value measurements | Total | Fair Value Measurements Using Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	[1]		$ 0
Other investments (equity securities)	[1]	$ 0
[1]	Effective January 1, 2018, the Company adopted ASU 2016-01, which requires equity securities with readily determinable fair values to be measured at fair value with changes in the fair value recognized through net income. In addition, the approximately $2.5 million current fair value of equity securities is now reflected within other investments on the consolidated balance sheets compared to securities AFS at December 31, 2017. Prior periods have not been restated for the impact of this accounting change. See Note 1 for additional information on this new accounting standard and see Note 5 for additional information on the impact to securities AFS.

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Level 3 assets measured at fair value on a recurring basis (Details 1) - Available-for-sale Securities - Level 3 - Recurring basis fair value measurements - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Level 3 Fair Value Measurements:
Balance at beginning of year	$ 9,151	$ 9,108
Acquired balance	0	189
Paydowns/Sales/Settlements	(556)	(146)
Balance at end of period	$ 8,595	$ 9,151

Fair Value Measurements - Mea61

Fair Value Measurements - Measured at Fair Value on Nonrecurring Basis (Details 2) - Measured at Fair Value on a Nonrecurring Basis - Total - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	$ 15,330	$ 17,058
OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1,367	1,294
MSR asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	3,140	3,187
Fair Value Measurements Using Level 1 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
Fair Value Measurements Using Level 1 | OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
Fair Value Measurements Using Level 1 | MSR asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
Fair Value Measurements Using Level 2 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
Fair Value Measurements Using Level 2 | OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
Fair Value Measurements Using Level 2 | MSR asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
Fair Value Measurements Using Level 3 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	15,330	17,058
Fair Value Measurements Using Level 3 | OREO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1,367	1,294
Fair Value Measurements Using Level 3 | MSR asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	$ 3,140	$ 3,187

Fair Value Measurements - Summa

Fair Value Measurements - Summary of carrying amounts and estimated fair values of financial instruments (Details 3) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial assets:
Securities AFS	$ 401,130	$ 405,153
Carrying Amount
Financial assets:
Cash and cash equivalents	433,015	154,933
Certificates of deposit in other banks	1,248	1,746
Securities AFS	401,130	405,153
Other investments, including equity securities	17,431	14,837
Loans held for sale	7,880	4,666
Loans, net	2,087,832	2,075,272
BOLI	64,895	64,453
MSR asset	3,140	3,187
Financial liabilities:
Deposits	2,765,090	2,471,064
FHLB advances	35,445	36,509
Junior subordinated debentures	29,736	29,616
Subordinated notes	11,931	11,921
Estimated Fair Value
Financial assets:
Cash and cash equivalents	433,015	154,933
Certificates of deposit in other banks	1,234	1,746
Securities AFS	401,130	405,153
Other investments, including equity securities	17,431	14,837
Loans held for sale	7,920	4,750
Loans, net	2,082,372	2,068,382
BOLI	64,895	64,453
MSR asset	4,039	4,097
Financial liabilities:
Deposits	2,763,061	2,469,456
FHLB advances	35,447	36,510
Junior subordinated debentures	29,141	29,024
Subordinated notes	11,504	11,495
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	433,015	154,933
Certificates of deposit in other banks	0	0
Securities AFS	0	2,571
Other investments, including equity securities	2,546	0
Loans held for sale	0	0
Loans, net	0	0
BOLI	64,895	64,453
MSR asset	0	0
Financial liabilities:
Deposits	0	0
FHLB advances	0	0
Junior subordinated debentures	0	0
Subordinated notes	0	0
Estimated Fair Value | Level 2
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit in other banks	1,234	1,746
Securities AFS	392,535	393,431
Other investments, including equity securities	13,177	13,142
Loans held for sale	7,920	4,750
Loans, net	0	0
BOLI	0	0
MSR asset	0	0
Financial liabilities:
Deposits	0	0
FHLB advances	35,447	36,510
Junior subordinated debentures	0	0
Subordinated notes	0	0
Estimated Fair Value | Level 3
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit in other banks	0	0
Securities AFS	8,595	9,151
Other investments, including equity securities	1,708	1,695
Loans held for sale	0	0
Loans, net	2,082,372	2,068,382
BOLI	0	0
MSR asset	4,039	4,097
Financial liabilities:
Deposits	2,763,061	2,469,456
FHLB advances	0	0
Junior subordinated debentures	29,141	29,024
Subordinated notes	$ 11,504	$ 11,495

Fair Value Measurements (Detail

Fair Value Measurements (Detail Textuals) $ in Millions	Mar. 31, 2018USD ($)
Fair Value Disclosures [Abstract]
Current fair value of equity securities reflected in other investments	$ 2.5