County Bancorp (ICBK) 10-Q 8 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 08, 2017
Document And Entity Information [Abstract]
Entity Registrant Name	County Bancorp, Inc.
Entity Central Index Key	1,470,205
Trading Symbol	ICBK
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Entity Common Stock, Shares Outstanding		6,673,381

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 71,795	$ 42,679
Securities available-for-sale, at fair value	107,242	123,437
FHLB Stock, at cost	4,309	5,688
Loans held for sale	2,054	1,162
Loans, net of allowance for loan losses of $13,625 as of September 30, 2017; $12,645 as of December 31, 2016	1,112,976	1,017,841
Premises and equipment, net	9,598	9,819
Loan servicing rights	8,986	9,264
Other real estate owned, net	6,974	3,161
Cash surrender value of bank owned life insurance	17,274	11,448
Deferred tax asset, net	5,218	5,486
Goodwill	5,038	5,038
Accrued interest receivable and other assets	6,823	6,206
Total assets	1,359,325	1,242,670
Deposits:
Noninterest-bearing	118,815	118,657
Interest-bearing	947,279	858,861
Total deposits	1,066,094	977,518
Other borrowings	1,352	2,152
Advances from FHLB	128,300	107,895
Subordinated debentures	15,506	15,451
Accrued interest payable and other liabilities	8,344	8,366
Total liabilities	1,219,596	1,111,382
SHAREHOLDERS' EQUITY
Preferred stock-variable rate, non-cumulative, nonparticipating, $1,000 stated value; 15,000 shares authorized; 8,000 shares issued at September 30, 2017 and December 31, 2016	8,000	8,000
Common stock - $0.01 par value; 50,000,000 authorized; 7,074,020 shares issued and 6,657,601 shares outstanding at September 30, 2017; 7,018,248 shares issued and 6,586,335 shares outstanding at December 31, 2016	27	26
Surplus	51,806	50,553
Retained earnings	84,751	77,907
Treasury stock, at cost; 432,861 shares at September 30, 2017; 431,913 shares at December 31, 2016	(4,828)	(4,828)
Accumulated other comprehensive loss	(27)	(370)
Total shareholders' equity	139,729	131,288
Total liabilities and shareholders' equity	1,359,325	1,242,670
Core Deposit
ASSETS
Core deposit intangible, net of accumulated amortization of $403 as of September 30, 2017; $360 as of December 31, 2016	$ 1,038	$ 1,441

CONSOLIDATED BALANCE SHEETS (U3

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Allowance for loan losses	$ 13,625	$ 12,645
Preferred Stock, stated value	$ 1,000	$ 1,000
Preferred Stock, shares authorized	15,000	15,000
Preferred Stock, shares issued	8,000	8,000
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	50,000,000	50,000,000
Common Stock, shares issued	7,074,020	7,018,248
Common Stock, shares outstanding	6,657,601	6,586,335
Treasury Stock, shares	432,861	431,913
Core Deposit
Core deposit intangible, amortization	$ 403	$ 360

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 13,070	$ 12,245	$ 36,952	$ 31,180
Taxable securities	461	426	1,346	1,021
Tax-exempt securities	82	84	262	283
Federal funds sold and other	102	48	243	137
Total interest and dividend income	13,715	12,803	38,803	32,621
INTEREST EXPENSE
Deposits	3,108	2,100	8,351	5,907
FHLB advances and other borrowed funds	511	408	1,356	1,043
Subordinated debentures	135	119	380	254
Total interest expense	3,754	2,627	10,087	7,204
Net interest income	9,961	10,176	28,716	25,417
Provision for loan losses	33	1,134	2,318	2,416
Net interest income after provision for loan losses	9,928	9,042	26,398	23,001
NON-INTEREST INCOME
Services charges	350	288	1,074	976
Gain on sale of loans, net	47	79	96	240
Loan servicing fees	1,563	1,458	4,038	5,037
Other	127	189	451	456
Total non-interest income	2,087	2,014	5,659	6,709
NON-INTEREST EXPENSE
Employee compensation and benefits	3,845	3,461	11,735	9,554
Occupancy	162	157	519	364
Information processing	450	288	1,209	2,045
Write-down of other real estate owned	7	250	85	334
Other	1,827	1,949	5,279	5,852
Total non-interest expense	6,291	6,105	18,827	18,149
Income before income taxes	5,724	4,951	13,230	11,561
Income tax expense	2,120	1,849	4,936	4,338
NET INCOME	$ 3,604	$ 3,102	$ 8,294	$ 7,223
NET INCOME PER SHARE:
Basic	$ 0.53	$ 0.46	$ 1.21	$ 1.13
Diluted	0.52	0.46	1.19	1.12
Dividends paid per share	$ 0.06	$ 0.05	$ 0.18	$ 0.15

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 3,604	$ 3,102	$ 8,294	$ 7,223
Other comprehensive income:
Unrealized gains on securities available-for-sale	(16)	(308)	563	1,204
Income tax expense	6	120	(220)	(470)
Total other comprehensive income	(10)	(188)	343	734
Comprehensive income	$ 3,594	$ 2,914	$ 8,637	$ 7,957

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	SBLF	Fox River Valley	Preferred Stock	Common Stock	Common StockFox River Valley	Surplus	SurplusFox River Valley	Retained Earnings	Retained EarningsSBLF	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2015	$ 107,024			$ 8,000	$ 19		$ 34,717		$ 68,825		$ (4,758)	$ 221
Net income	7,223								7,223
Other comprehensive income	734											734
Stock compensation expense, net of tax	295						295
Purchase of treasury stock	(70)										(70)
Cash dividends declared on common stock	(941)								(941)
Cash dividends declared on preferred stock	(240)	$ (21)							(240)	$ (21)
Shares issued in acquisition			$ 14,256			$ 7		$ 14,249
Proceeds from exercise of common stock options	534						534
Balance at Sep. 30, 2016	128,794			8,000	26		49,795		74,846		(4,828)	955
Balance at Dec. 31, 2016	131,288			8,000	26		50,553		77,907		(4,828)	(370)
Net income	8,294								8,294
Other comprehensive income	343											343
Stock compensation expense, net of tax	393						393
Cash dividends declared on common stock	(1,194)								(1,194)
Cash dividends declared on preferred stock	(256)								(256)
Proceeds from exercise of common stock options	861				1		860
Balance at Sep. 30, 2017	$ 139,729			$ 8,000	$ 27		$ 51,806		$ 84,751		$ (4,828)	$ (27)

CONSOLIDATED STATEMENTS OF STO7

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)	9 Months Ended
	Sep. 30, 2016shares
Purchase of treasury stock, shares	10,305
Options, exercised	45,493
Fox River Valley
Acquisition of shares	712,830

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 8,294,000	$ 7,223,000
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization of premises and equipment	744,000	726,000
Amortization of core deposit intangible	403,000	211,000
Amortization of subordinated debentures	55,000
Provision for loan losses	2,318,000	2,416,000
Realized loss on sale of securities available-for-sale	37,000
Realized gain on sales of other real estate owned	(363,000)	(121,000)
Write-down of other real estate owned	85,000	334,000
Realized gain (loss) on sales of premises and equipment	290,000	(13,000)
Increase in cash surrender value of bank owned life insurance	(326,000)	(219,000)
Deferred income tax expense	45,000	459,000
Stock compensation expense, net	393,000	295,000
Net amortization of securities	685,000	637,000
Net change in:
Accrued interest receivable and other assets	(617,000)	1,511,000
Loans held for sale	(892,000)	6,241,000
Loan servicing rights	278,000	(1,020,000)
Accrued interest payable and other liabilities	(22,000)	492,000
Net cash provided by operating activities	11,407,000	19,172,000
Cash flows from investing activities
Proceeds from maturities, principal repayments, and call of securities available for sale	22,757,000	15,252,000
Purchases of securities available-for-sale	(10,108,000)	(6,764,000)
Proceeds from sales of securities available-for-sale	3,389,000	0
Redemption (purchases) of FHLB stock	1,379,000	(2,181,000)
Purchases of bank owned life insurance	(5,500,000)
Loan originations and principal collections, net	(102,231,000)	(104,067,000)
Proceeds from sales of premises and equipment	1,615,000	25,000
Purchases of premises and equipment	(2,428,000)	(1,516,000)
Proceeds from sales of other real estate owned	1,244,000	2,471,000
Net cash provided by business combination		12,320,000
Net cash used in investing activities	(89,883,000)	(84,460,000)
Cash flows from financing activities
Net decrease in demand and savings deposits	(28,940,000)	(40,851,000)
Net increase in certificates of deposits	117,516,000	95,123,000
Net change in other borrowings	(800,000)	(1,727,000)
Proceeds from FHLB advances	192,660,000	767,200,000
Repayment of FHLB advances	(172,255,000)	(700,750,000)
Payments to acquire treasury stock		(70,000)
Proceeds from issuance of common stock	861,000	534,000
Dividends paid on preferred stock	(256,000)	(240,000)
Dividends paid on common stock	(1,194,000)	(941,000)
Net cash provided by financing activities	107,592,000	103,257,000
Net change in cash and cash equivalents	29,116,000	37,969,000
Cash and cash equivalents, beginning of period	42,679,000	14,907,000
Cash and cash equivalents, end of period	71,795,000	52,876,000
Cash paid during the period for:
Interest	9,841,000	6,987,000
Income taxes	5,050,000	3,935,000
Noncash investing activities:
Transfer from loans to other real estate owned	4,779,000	159,000
Transfer from premises and equipment to other real estate owned		397,000
Loans charged off	$ 1,492,000	1,232,000
SBLF
Cash flows from financing activities
Redemption of SBLF preferred stock		(15,000,000)
Dividends paid on preferred stock		$ (21,000)

BASIS OF PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
BASIS OF PRESENTATION	NOTE 1 – BASIS OF PRESENTATION The unaudited consolidated financial statements of County Bancorp, Inc. (“we,” “us,” ”our,” or the “Company”) and its subsidiaries, including Investors Community Bank (the “Bank”), have been prepared, in the opinion of management, to reflect all adjustments necessary for a fair presentation of the financial position, results of operations, and cash flows as of and for the nine months ended September 30, 2017 for the interim period. The results of operations for the three and nine months ended September 30, 2017 may not necessarily be indicative of the results to be expected for the year ending December 31, 2017, or for any other period. Management of the Company is required to make estimates and assumptions which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of income and expenses during the reported periods. Actual results could differ significantly from those estimates. These unaudited interim financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”). Certain information in footnote disclosure normally included in financial statements prepared in accordance with GAAP has been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. The Company qualifies as an “emerging growth company” under the Jumpstart Our Business Startups Act (the “JOBS Act”). Section 107 of the JOBS Act provides that an emerging growth company can take advantage of the extended transition period provided in Section 7(a)(2)(B) of the Securities Act of 1933, as amended (the “Securities Act”), for complying with new or revised accounting standards. As an emerging growth company, the Company can delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. The Company elected to take advantage of the benefits of this extended transition period. New Accounting Pronouncements In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation to simplify several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The amendments in this update became effective beginning January 1, 2017 and did not have a significant impact the Company’s financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses, to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendment replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This amendment is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted for the fiscal year beginning after December 15, 2018, including interim periods within those fiscal years. Entities should apply this amendment as a modified-retrospective approach, through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company has developed a steering committee to implement this ASU, and is currently in the process of evaluating which methodology we will apply to our loan portfolio. The steering committee is also interviewing third-party vendors that will provide consulting and software services. At this time, the effect this ASU will have on its consolidated financial statements is unknown. In January 2017, the FASB issued ASU No. 2017-04 Intangibles – Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment The Company early adopted this amendment effective January 1, 2017 for its goodwill impairment analysis. The result of this amendment had no impact on the Company since its goodwill is not impaired as of September 30, 2017. In March 2017, the FASB issued updated guidance codified within ASU No. 2017-08, Receivables – Nonrefundable Fees and Other Costs, which is intended to enhance the accounting for the amortization of premiums for purchased callable debt securities. The amendment is effective for fiscal years beginning after December 15, 2018, with early adoption permitted including adoption in an interim period. The Company is currently evaluating the effects this ASU will have on its consolidated financial statements. In May 2017, the FASB issued updated guidance codified within ASU No. 2017-09, Compensation – Stock Compensation to provide clarity and reduce the diversity in practice and cost and complexity of applying the guidance when there is a change of terms condition of share-based awards. The amendment is effective for fiscal years beginning after December 15, 2017, with early adoption permitted including adoption in an interim period. The adoption of this ASU is not expected to have a significant impact on the Company’s consolidated financial because modification to share-based awards are rarely made . In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share – Accounting for Certain Financial Instruments with Down Round Features to address the complexity of the accounting for equity-classified financial instruments with down round features. The amendment is effective for fiscal years beginning after December 15, 2019, with early adoption permitted including adoption in an interim period. The adoption of this ASU is not expected to have a significant impact on the Company’s consolidated financial because the Company does not issues equity-classified financial instruments with down round features.

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	NOTE 2 – EARNINGS PER SHARE Earnings per common share is computed using the two-class method. Basic earnings per common share is computed by dividing net income by the weighted-average number of common shares outstanding during the applicable period. Diluted earnings per share is computed using the weighted-average number of shares determined for the basic earnings per common share plus the dilutive effect of share-based compensation using the treasury stock method. For the Three Months Ended For the Nine Months Ended September 30, September 30, 2017 2016 2017 2016 (dollars in thousands) Net income from continuing operations $ 3,604 $ 3,102 $ 8,294 $ 7,223 Less: preferred stock dividends 91 80 257 261 Income available to common shareholders for basic earnings per common share $ 3,513 $ 3,022 $ 8,037 $ 6,962 Average number of common shares issued 7,333,799 7,310,944 7,327,268 6,951,282 Less: weighted average treasury shares 432,861 428,806 432,653 424,408 Less: weighted average nonvested equity incentive plan shares 256,638 357,708 271,338 367,357 Weighted average number of common shares outstanding 6,644,300 6,524,430 6,623,277 6,159,517 Effect of dilutive options 112,904 94,924 119,371 97,485 Weighted average number of common shares outstanding used to calculate diluted earnings per common share 6,757,204 6,619,354 6,742,648 6,257,002

SECURITIES AVAILABLE-FOR-SALE

SECURITIES AVAILABLE-FOR-SALE	9 Months Ended
	Sep. 30, 2017
Investments Debt And Equity Securities [Abstract]
SECURITIES AVAILABLE-FOR-SALE	NOTE 3 – SECURITIES AVAILABLE-FOR-SALE The amortized cost and fair value of securities available-for-sale as of September 30, 2017 and December 31, 2016 were as follows: Amortized Unrealized Unrealized Fair Cost Gains Losses Value (dollars in thousands) September 30, 2017 Municipal securities $ 37,772 $ 175 $ (68 ) $ 37,879 Mortgage-backed securities 69,515 291 (443 ) 69,363 Asset-backed securities — — — — $ 107,287 $ 466 $ (511 ) $ 107,242 December 31, 2016 U.S. government and agency securities $ 1,000 $ — $ — $ 1,000 Municipal securities 45,638 57 (239 ) 45,456 Mortgage-backed securities 73,648 292 (632 ) 73,308 Asset-backed securities 3,761 3 (91 ) 3,673 $ 124,047 $ 352 $ (962 ) $ 123,437 The amortized cost and fair value of securities at September 30, 2017 and December 31, 2016, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Fair Cost Value (dollars in thousands) September 30, 2017 Due in one year or less $ 9,553 $ 9,554 Due from one to five years 19,268 19,333 Due from five to ten years 8,951 8,992 Due after ten years — — Mortgage-backed securities 69,515 69,363 $ 107,287 $ 107,242 December 31, 2016 Due in one year or less $ 17,396 $ 17,311 Due from one to five years 25,960 25,912 Due from five to ten years 7,043 6,906 Due after ten years — — Mortgage-backed securities 73,648 73,308 $ 124,047 $ 123,437 Proceeds from sale of securities available-for-sale were $3.4 million and the gross loss realized was $37,000 for the nine months ended September 30, 2017. There were no security sales for the nine months ended September 30, 2016. At September 30, 2017 and December 31, 2016, no securities were pledged to secure the FHLB advances besides FHLB stock of $4.3 million and $5.7 million, respectively. At September 30, 2017 and December 31, 2016, the carrying amount of securities pledged to secure the Federal Reserve Bank Line of Credit was $8.5 million and $11.2 million, respectively. The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temorarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at September 30, 2017 and December 31, 2016: Less Than 12 Months 12 Months or Greater Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses (dollars in thousands) September 30, 2017 Municipal securities $ 12,116 $ (50 ) $ 3,492 $ (18 ) $ 15,608 $ (68 ) Mortgage-backed securities 28,930 (221 ) 10,647 (222 ) 39,577 (443 ) Asset-backed securities — — — — — — $ 41,046 $ (271 ) $ 14,139 $ (240 ) $ 55,185 $ (511 ) December 31, 2016 U.S. government and agency securities $ — $ — $ — $ — $ — $ — Municipal securities 24,924 (236 ) 604 (3 ) 25,528 (239 ) Mortgage-backed securities 48,719 (632 ) — — 48,719 (632 ) Asset-backed securities 2,745 (91 ) — — 2,745 (91 ) $ 76,388 $ (959 ) $ 604 $ (3 ) $ 76,992 $ (962 ) The unrealized loss on the investments at September 30, 2017 and December 31, 2016 was due to normal fluctuations and pricing inefficiencies. The contractual terms of the investments do not permit the issuers to settle the securities at a price less than the amortized cost basis of the investment. Because the Company does not intend to sell the investments and it is not more-likely-than-not that the Company will be required to sell the investments before recovery of the amortized cost basis, which may be maturity, the Company does not consider these investments to be other-than-temporarily impaired at September 30, 2017 and December 31, 2016.

LOANS

LOANS	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
LOANS	NOTE 4 – LOANS The components of loans were as follows: September 30, December 31, 2017 2016 (dollars in thousands) Agricultural loans $ 675,856 $ 624,632 Commercial real estate loans 290,420 270,475 Commercial loans 107,569 89,944 Residential real estate loans 52,527 45,276 Installment and consumer other 229 159 Total gross loans 1,126,601 1,030,486 Allowance for loan losses (13,625 ) (12,645 ) Loans, net $ 1,112,976 $ 1,017,841 Changes in the allowance for loan losses by portfolio segment for the nine months ended September 30, 2017 and 2016 were as follows: September 30, 2017 Agricultural Commercial Real Estate Commercial Residential Real Estate Installment and Consumer Other Unallocated Total (dollars in thousands) Balance, beginning of year $ 8,173 $ 2,762 $ 1,239 $ 470 $ 1 $ — $ 12,645 Provision for loan losses 688 733 1,137 (241 ) 1 — 2,318 Loans charged off — (575 ) (917 ) — — — (1,492 ) Recoveries 43 80 31 — — — 154 Balance, end of period $ 8,904 $ 3,000 $ 1,490 $ 229 $ 2 $ — $ 13,625 September 30, 2016 Agricultural Commercial Real Estate Commercial Residential Real Estate Installment and Consumer Other Unallocated Total (dollars in thousands) Balance, beginning of year $ 6,355 $ 2,237 $ 1,268 $ 533 $ 12 $ — $ 10,405 Provision for loan losses 1,947 419 168 (118 ) (6 ) 6 2,416 Loans charged off (896 ) (50 ) (277 ) (5 ) (4 ) — (1,232 ) Recoveries 2 26 9 — — — 37 Balance, end of period $ 7,408 $ 2,632 $ 1,168 $ 410 $ 2 $ 6 $ 11,626 The following tables present the balances in the allowance for loan losses and the recorded balance in loans by portfolio segment and based on impairment method as of September 30, 2017 and December 31, 2016: September 30, 2017 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (dollars in thousands) Allowance for loan losses: Agricultural loans $ 884 $ 8,020 $ 8,904 Commercial real estate loans 200 2,800 3,000 Commercial loans 43 1,447 1,490 Residential real estate loans — 229 229 Installment and consumer other — 2 2 Total ending allowance for loan losses 1,127 12,498 13,625 Loans: Agricultural loans 29,097 646,759 675,856 Commercial real estate loans 3,834 286,586 290,420 Commercial loans 1,158 106,411 107,569 Residential real estate loans — 52,527 52,527 Installment and consumer other — 229 229 Total loans 34,089 1,092,512 1,126,601 Net loans $ 32,962 $ 1,080,014 $ 1,112,976 December 31, 2016 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (dollars in thousands) Allowance for loan losses: Agricultural loans $ 546 $ 7,627 $ 8,173 Commercial real estate loans 377 2,385 2,762 Commercial loans 413 826 1,239 Residential real estate loans — 470 470 Installment and consumer other — 1 1 Total ending allowance for loan losses 1,336 11,309 12,645 Loans: Agricultural loans 13,044 611,588 624,632 Commercial real estate loans 4,952 265,523 270,475 Commercial loans 3,376 86,568 89,944 Residential real estate loans 68 45,208 45,276 Installment and consumer other — 159 159 Total loans 21,440 1,009,046 1,030,486 Net loans $ 20,104 $ 997,737 $ 1,017,841 The following table presents the aging of the recorded investment in past due loans at September 30, 2017 and December 31, 2016: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Loans Not Past Due (dollars in thousands) September 30, 2017 Agricultural loans $ 3,429 $ 258 $ 6,264 $ 9,951 $ 665,905 Commercial real estate loans — 624 2,892 3,516 286,904 Commercial loans 135 — 1,118 1,253 106,316 Residential real estate loans 3 — — 3 52,524 Installment and consumer other — — — — 229 Total $ 3,567 $ 882 $ 10,274 $ 14,723 $ 1,111,878 December 31, 2016 Agricultural loans $ 12 $ — $ 9,680 $ 9,692 $ 614,940 Commercial real estate loans — 287 2,710 2,997 267,478 Commercial loans 371 — 2,695 3,066 86,878 Residential real estate loans — — — — 45,276 Installment and consumer other — — — — 159 Total $ 383 $ 287 $ 15,085 $ 15,755 $ 1,014,731 The following table lists information on nonaccrual, restructured, and certain past due loans at September 30, 2017 and December 31, 2016: September 30, December 31, 2017 2016 (dollars in thousands) Nonaccrual loans, 90 days or more past due $ 10,274 $ 15,085 Nonaccrual loans 30-89 days past due 2,430 371 Nonaccrual loans, less than 30 days past due 158 4,651 Restructured loans not on nonaccrual status 8,087 4,300 90 days or more past due and still accruing — — Total 20,949 24,407 The following table presents the recorded investment in nonaccrual loans and loans past due 90 days or more at September 30, 2017 and December 31, 2016: September 30, December 31, 2017 2016 (dollars in thousands) Agricultural loans $ 8,228 $ 12,323 Commercial real estate loans 3,516 4,340 Commercial loans 1,118 3,376 Residential real estate loans — 68 Total $ 12,862 $ 20,107 The average recorded investment in total impaired loans for the nine months ended September 30, 2017 and for the year ended December 31, 2016 amounted to approximately $27.8 million and $25.9 million, respectively. Impaired loans include nonaccrual loans, restructured loans, and loans that are 90 days or more past due and still accruing. Interest income recognized on total impaired loans for the nine months ended September 30, 2017 and for the year ended December 31, 2016 amounted to approximately $0.3 million and $0.4 million, respectively. For nonaccrual loans included in impaired loans, the interest income that would have been recognized had those loans been performing in accordance with their original terms would have been approximately $0.7 million and $1.5 million for the nine months ended September 30, 2017 and for the year ended December 31, 2016, respectively. Troubled Debt Restructurings The Company has allocated approximately $0.8 million and $0.5 million of specific reserves to customers whose loan terms have been modified in troubled debt restructurings (“TDR”) at September 30, 2017 and December 31, 2016, respectively. The Company had no additional lending commitments at September 30, 2017 or December 31, 2016 to customers with outstanding loans that are classified as TDRs. A TDR on nonaccrual status is classified as a nonaccrual loan until evaluation supports reasonable assurance of repayment and there has been a satisfactory period of performance according to the modified terms of the loan. Once this assurance is reached, the TDR is classified as a restructured loan. There were no unfunded commitments on these loans at September 30, 2017 and December 31, 2016. The following table presents the TDRs by loan class at September 30, 2017 and December 31, 2016: Non-Accrual Restructured and Accruing Total (dollars in thousands) September 30, 2017 Agricultural loans $ 4,356 $ 7,729 $ 12,085 Commercial real estate loans 624 318 942 Commercial loans — 40 40 Total $ 4,980 $ 8,087 $ 13,067 December 31, 2016 Agricultural loans $ 7,947 $ 3,925 $ 11,872 Commercial real estate loans 1,400 325 1,725 Commercial loans 371 50 421 Total $ 9,718 $ 4,300 $ 14,018 The following table provides the number of loans modified in a troubled debt restructuring investment by class for the nine months ended September 30, 2017 and 2016: For the Nine Months Ended For the Nine Months Ended September 30, 2017 September 30, 2016 Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Troubled debt restructurings: Agricultural loans 16 $ 6,810 14 $ 8,704 Commercial real estate loans — — 2 553 Commercial loans — — 2 1,632 Total 16 $ 6,810 18 $ 10,889 The following table provides the troubled debt restructurings for the nine months ended September 30, 2017 and 2016 grouped by type of concession: For the Nine Months Ended For the Nine Months Ended September 30, 2017 September 30, 2016 Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Agricultural loans Payment concessions 9 $ 5,581 6 $ 1,732 Extension of interest-only payments 6 908 5 1,243 Combination of extension of term and interest rate concessions 1 321 3 5,729 Commercial real estate loans Extension of interest-only payments — — 2 553 Commercial loans Extension of interest-only payments — — 2 1,632 Total 16 $ 6,810 18 $ 10,889 Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of the borrowers to service their debt, such as current financial information, historical payment experience, credit documentation, public information and current economic trends, among other factors. Beginning in the third quarter of 2016, the substandard category was separated in to performing and impaired subcategories to provide more detailed analysis of this category of loans. The Company analyzes agricultural, commercial, and commercial real estate loans individually by classifying the credits as to credit risk. The process of analyzing loans for changes in risk rating is ongoing through routine monitoring of the portfolio and annual internal credit reviews for credits with total exposure in excess of $300,000. The Company uses the following definitions for credit risk ratings: Sound. Credits classified as sound show very good probability of ongoing ability to meet and/or exceed obligations. Acceptable. Credits classified as acceptable show a good probability of ongoing ability to meet and/or exceed obligations. Satisfactory. Credits classified as satisfactory show fair probability of ongoing ability to meet and/or exceed obligations. Low Satisfactory . Credits classified as low satisfactory show fair probability of ongoing ability to meet and/or exceed obligations. Low satisfactory credits may be newer or have a less established track record of financial performance, inconsistent earnings, or may be going through an expansion. Watch. Credits classified as watch show some questionable probability of ongoing ability to meet and/or exceed obligations. Special Mention. Credits classified as special mention show potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loans or of the institution’s credit position at some future date. Substandard – Performing. Credits classified as substandard – performing generally have well-defined weaknesses. Collateral coverage is adequate and the loans are not considered impaired. Payments are being made and the loans are on accrual status. Substandard - Impaired . Credits classified as substandard generally have well-defined weaknesses that jeopardize the repayment of the debt. They have a distinct possibility that a loss will be sustained if the deficiencies are not corrected. Loans are considered impaired. Loans are either exhibiting signs of delinquency, are on non-accrual or are identified as a TDR. Doubtful. Credits classified as doubtful have all the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable. The Company categorizes residential real estate, installment and consumer other loans as satisfactory at the time of origination based on information obtained as to the ability of the borrower(s) to service their debt, such as current financial information, employment status and history, historical payment experience, credit scores and type and amount of collateral among other factors. The Company updates relevant information on these types of loans at the time of refinance, troubled debt restructuring or other indications of financial difficulty, downgrading as needed using the same category descriptions as for agricultural, commercial, and commercial real estate loans. In addition, the Company further considers current payment status as an indicator of which risk category to assign the borrower. The greater the level of deteriorated risk as indicated by a loan’s assigned risk category, the greater the likelihood a loss will occur in the future. If the loan is substandard - impaired, then the loan loss reserves for the loan are recorded at the loss level of impairment. If the loan is not impaired, then its loan loss reserves are determined by the application of a loss rate that increases with risk in accordance with the allowance for loan loss analysis. Based on the most recent analysis performed by management, the risk category of loans by class of loans was as follows as of September 30, 2017 and December 31, 2016: As of September 30, 2017 Sound/ Acceptable/ Satisfactory/ Low Satisfactory Watch Special Mention Substandard Performing Substandard Impaired Total Loans (dollars in thousands) Agricultural loans $ 508,722 $ 100,993 $ 15,012 $ 41,923 9,206 $ 675,856 Commercial real estate loans 225,807 43,907 7,300 9,890 3,516 290,420 Commercial loans 88,132 12,741 1,144 4,434 1,118 107,569 Residential real estate loans 48,623 3,784 — — 120 52,527 Installment and consumer other 229 — — — — 229 Total $ 871,513 $ 161,425 $ 23,456 $ 56,247 $ 13,960 $ 1,126,601 As of December 31, 2016 Sound/ Acceptable/ Satisfactory/ Low Satisfactory Watch Special Mention Substandard Performing Substandard Impaired Total Loans (dollars in thousands) Agricultural loans $ 502,084 $ 84,801 $ 12,657 $ 12,046 $ 13,044 $ 624,632 Commercial real estate loans 225,038 27,368 378 12,739 4,952 270,475 Commercial loans 74,221 6,624 1,632 4,091 3,376 89,944 Residential real estate loans 40,556 4,151 501 — 68 45,276 Installment and consumer other 159 — — — — 159 Total $ 842,058 $ 122,944 $ 15,168 $ 28,876 $ 21,440 $ 1,030,486

LOAN SERVICING RIGHTS

LOAN SERVICING RIGHTS	9 Months Ended
	Sep. 30, 2017
Transfers And Servicing [Abstract]
LOAN SERVICING RIGHTS	NOTE 5 – LOAN SERVICING RIGHTS Loans serviced for others are not included in the accompanying consolidated balance sheets. The risks inherent in servicing assets relate primarily to changes in prepayments that result from shifts in interest rates. The unpaid principal balances of mortgage and other loans serviced for others were approximately $594.6 million and $577.0 million at September 30, 2017 and December 31, 2016, respectively. The fair value of these rights were approximately $12.4 million and $12.2 million at September 30, 2017 and December 31, 2016, respectively. The fair value of servicing rights was determined using an assumed discount rate of 10 percent and prepayment speeds primarily ranging from 4 percent to 9 percent, depending upon the stratification of the specific right, and nominal credit losses. The following summarizes servicing rights capitalized and amortized, along with the aggregate activity in related valuation allowances: September 30, December 31, 2017 2016 (dollars in thousands) Loan servicing rights: Balance, beginning of period $ 9,264 $ 8,145 Additions 1,831 4,794 Disposals (474 ) (1,552 ) Amortization (1,635 ) (2,123 ) Balance, end of period $ 8,986 $ 9,264

GOODWILL AND CORE DEPOSIT INTAN

GOODWILL AND CORE DEPOSIT INTANGIBLE	9 Months Ended
	Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
GOODWILL AND CORE DEPOSIT INTANGIBLE	NOTE 6 – GOODWILL AND CORE DEPOSIT INTANGIBLE The excess of the purchase price in an acquisition over the fair value of net assets acquired consists primarily of goodwill and the core deposit intangible. Goodwill is not amortized but is instead subject to impairment tests on at least an annual basis. Core deposit intangible, which arose from value ascribed to the deposit base of a bank acquired, has an estimated finite life and is amortized on an accelerated basis to expense over a 66-month period. Management will periodically review the carrying value of its long-lived and 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. Goodwill : Goodwill resulted from the acquisition of Fox River Valley Bancorp, Inc. (“Fox River Valley”) on May 13, 2016. The carrying amount of goodwill was $5.0 million at September 30, 2017 and December 31, 2016. Core deposit intangible: Core deposit intangible, primarily related to acquired customer relationships, is amortized over their estimated finite lives. The core deposit intangible related to the Fox River Valley acquisition had a gross carrying amount of $1.8 million. Amortization on core deposit intangible was $763 thousand at September 30, 2017 and $360 thousand at December 31, 2016. September 30, 2017 December 31, 2016 (dollars in thousands) Core deposit intangible: Gross carrying amount $ 1,801 $ 1,801 Accumulated amortization (763 ) (360 ) Net book value $ 1,038 $ 1,441 Additions during the period $ — $ 1,801

DEPOSITS

DEPOSITS	9 Months Ended
	Sep. 30, 2017
Banking And Thrift [Abstract]
DEPOSITS	NOTE 7 – DEPOSITS Deposits are summarized as follows at September 30, 2017 and December 31, 2016: September 30, December 31, 2017 2016 (dollars in thousands) Demand deposits $ 118,815 $ 118,657 Savings 233,199 262,296 Certificates of deposit 714,080 596,565 Total deposits $ 1,066,094 $ 977,518 At September 30, 2017 and December 31, 2016, brokered deposits amounted to $281.2 million and $193.6 million, respectively, and are included in savings and certificates of deposit categories.

ADVANCES FROM FHLB AND OTHER BO

ADVANCES FROM FHLB AND OTHER BORROWINGS	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
ADVANCES FROM FHLB AND OTHER BORROWINGS	NOTE 8—ADVANCES FROM FHLB AND OTHER BORROWINGS The Bank had advances outstanding from the FHLB in the amount of $128.3 million and $107.9 million on September 30, 2017 and December 31, 2016, respectively. These advances, rates, and maturities were as follows: September 30, December 31, Maturity Rate 2017 2016 (dollars in thousands) Fixed rate, fixed term 01/03/2017 0.94 % $ — $ 595 Fixed rate, fixed term 02/27/2017 0.76 % — 5,000 Fixed rate, fixed term 03/15/2017 1.46 % — 2,000 Fixed rate, fixed term 06/16/2017 0.80 % — 10,000 Fixed rate, fixed term 08/11/2017 0.83 % — 5,000 Fixed rate, fixed term 11/15/2017 0.95 % 3,800 3,800 Fixed rate, fixed term 12/29/2017 1.27 % 3,000 3,000 Fixed rate, fixed term 01/02/2018 1.23 % 1,000 1,000 Fixed rate, fixed term 01/12/2018 0.85 % 8,000 8,000 Fixed rate, fixed term 02/12/2018 0.91 % 5,000 5,000 Fixed rate, fixed term 04/23/2018 1.07 % 2,300 2,300 Fixed rate, fixed term 06/18/2018 0.93 % 10,000 10,000 Fixed rate, fixed term 07/09/2018 1.41 % 15,000 — Fixed rate, fixed term 07/16/2018 1.21 % 762 762 Fixed rate, fixed term 07/16/2018 1.21 % 1,038 1,038 Fixed rate, fixed term 08/20/2018 1.15 % 1,000 1,000 Fixed rate, fixed term 08/20/2018 1.15 % 800 800 Fixed rate, fixed term 08/20/2018 1.27 % 2,200 2,200 Fixed rate, fixed term 11/09/2018 1.47 % 10,000 — Fixed rate, fixed term 12/31/2018 1.65 % 3,000 3,000 Fixed rate, fixed term 02/27/2019 1.47 % 5,000 5,000 Fixed rate, fixed term 03/08/2019 1.54 % 10,000 — Fixed rate, fixed term 07/15/2019 1.11 % 8,000 8,000 Fixed rate, fixed term 08/14/2019 1.77 % 2,000 2,000 Fixed rate, fixed term 02/20/2020 1.71 % 5,000 5,000 Fixed rate, fixed term 07/16/2020 1.85 % 800 800 Fixed rate, fixed term 08/25/2020 1.84 % 3,000 3,000 Fixed rate, fixed term 08/27/2020 1.88 % 5,000 5,000 Fixed rate, fixed term 12/30/2020 2.09 % 4,000 4,000 Fixed rate, fixed term 12/31/2020 1.94 % 600 600 Fixed rate, fixed term 04/12/2021 1.92 % 8,000 — Fixed rate, fixed term 06/15/2021 1.39 % 5,000 5,000 Fixed rate, fixed term 08/16/2021 2.29 % 3,000 3,000 Fixed rate, fixed term 12/30/2021 2.29 % 2,000 2,000 $ 128,300 $ 107,895 The terms of security agreements with the FHLB require the Bank to pledge collateral for its borrowings. The collateral consists of qualifying first mortgage loans, certain securities available for sale, and stock of the FHLB. The Bank had no irrevocable letters of credit with the FHLB as of September 30, 2017 and December 31, 2016. Future maturities of borrowings were as follows: September 30, December 31, 2017 2016 (dollars in thousands) 1 year or less $ 53,900 $ 29,395 1 to 2 years 38,000 35,100 2 to 3 years 13,800 15,000 3 to 4 years 20,600 18,400 Over 4 years 2,000 10,000 $ 128,300 $ 107,895 As of September 30, 2017 and December 31, 2016, the Bank also had a $50.0 million line-of-credit available with the Federal Reserve Bank of Chicago. Borrowings under this line of credit are limited by the amount of securities pledged by the Bank as collateral, which totaled $8.5 million and $11.2 million at September 30, 2017 and December 31, 2016, respectively. There were no outstanding advances included in other borrowings at September 30, 2017 and December 31, 2016, respectively. On September 14, 2017, the Company entered into a credit agreement with U.S. Bank National Association for a $15.0 million revolving line-of-credit with an interest rate of the one-month LIBOR rate plus 2.25%. The line also bears a non-usage fee of 0.275% per annum. The line did not have an outstanding balance as of September 30, 2017, and was unused during the quarter. Other borrowings are borrowings as a result of sold loans that do not qualify for sale accounting. These agreements are recorded as financing transactions as the Bank maintains effective control over the transferred loans. The dollar amount of the loans underlying the sale agreements continues to be carried in the Bank’s loan portfolio, and the transfer is reported as a secured borrowing with pledge of collateral. At September 30, 2017 and December 31, 2016, the amounts of these borrowings were $1.3 million and $2.0 million, respectively. Also included in other borrowings is the capital lease for our full service banking location in Appleton, Wisconsin that was assumed in connection with our merger of Fox River Valley. Under the terms of the current triple-net lease the Company is obligated to pay monthly rent of $15 thousand, and the lease term expires in April, 2018. As of September 30, 2017, liability remaining under the capital lease was $81 thousand, and the amortization related to the lease was $109 thousand for the nine months ended September 30, 2017. As of December 31, 2016, liability remaining under the capital lease was $189 thousand, and the amortization related to the lease was $65 thousand for the year ended December 31, 2016. The following table sets forth information concerning balances and interest rates on other borrowings as of and for the periods indicated: September 30, December 31, 2017 2016 (dollars in thousands) Balance outstanding at end of period $ 1,352 $ 2,152 Average amount outstanding during the period 1,618 3,047 Maximum amount outstanding at any month end 1,825 3,930 Weighted average interest rate during the period 5.84 % 5.30 % Weighted average interest rate at end of period 6.20 % 5.32 %

EQUITY INCENTIVE PLAN

EQUITY INCENTIVE PLAN	9 Months Ended
	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
EQUITY INCENTIVE PLAN	NOTE 9 – EQUITY INCENTIVE PLAN Under the Company’s 2016 Long Term Incentive Plan (the “Plan”), the Company may grant options to purchase shares of common stock and issue restricted stock to its directors, officers, and employees. Both qualified and non-qualified stock options and restricted stock may be granted and issued, respectively, under the Plan. As of September 30, 2017, 30,234 options or shares of restricted stock have been granted under the Plan. The exercise price of each option equals the market price of the Company’s stock on the date of grant and an option’s maximum term is ten years. Vesting periods range from one to five years from the date of grant. The restricted stock vesting periods range from one to five years from the date of issuance. The status of the Plan as of September 30, 2017 and changes in the Plan during the nine months ended September 30, 2017 were as follows: September 30, 2017 Number of Options Weighted-Average Exercise Price Aggregate Intrinsic Value (1) (dollars in thousands except option and per share data) Outstanding, beginning of year 291,059 $ 15.18 Granted 24,653 26.27 Exercised (65,026 ) 12.68 Forfeited/expired (4,868 ) 21.69 Outstanding, end of period 245,818 $ 16.83 $ 3,250 Options exercisable at period-end 159,329 $ 14.67 $ 2,450 Weighted-average fair value of options granted during the period (2) $ 9.54 (1) The aggregate intrinsic value of a stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on September 30, 2017. This amount changes based on changes in the market value of the Company’s stock. (2) The fair value (present value of the estimated future benefit to the option holder) of each option grant is estimated on the date of grant using the Black-Scholes option pricing model. Activity in restricted stock awards (“RSA”) and restricted stock units (“RSU”) for the nine months ended September 30, 2017 was as follows: September 30, 2017 RSAs Weighted Average Grant Price Outstanding, beginning of year 38,593 $ 17.27 Granted 5,988 27.31 Vested (2,416 ) 19.77 Forfeited/expired (948 ) 27.31 Outstanding, end of period 41,217 $ 18.35 September 30, 2017 RSUs Weighted Average Grant Price Outstanding, beginning of year — $ — Granted 8,691 25.53 Vested — — Forfeited/expired — — Outstanding, end of period 8,691 $ 25.53 For the nine months ended September 30, 2017 and 2016, share-based compensation expense, including options and restricted stock awards, applicable to the Plan was $393 thousand and $295 thousand, respectively. As of September 30, 2017, unrecognized share-based compensation expense related to nonvested options and restricted stock awards amounted to $0.7 million and is expected to be recognized over a weighted average period of 2.20 years.

REGULATORY MATTERS

REGULATORY MATTERS	9 Months Ended
	Sep. 30, 2017
Regulatory Capital Requirements [Abstract]
REGULATORY MATTERS	NOTE 10 – REGULATORY MATTERS The Company (on a consolidated basis) and the Bank are each subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the following table) of total, Tier 1 and Tier 1 Common Equity capital to risk-weighted assets, and of Tier 1 capital to average assets, as such terms are defined in the regulations. Management believed, as of September 30, 2017 and December 31, 2016, that the Company and the Bank met all capital adequacy requirements to which they were subject. As of September 30, 2017, the Bank’s capital ratios met those required to be considered as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Bank must maintain minimum total risk-based, Tier 1 risk-based, Tier 1 Common Equity risk-based, and Tier 1 leverage ratios as set forth in the following tables. The Company’s and the Bank’s actual capital amounts and ratios are presented in the following table: Actual Minimum For Capital Adequacy Purposes (a) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) September 30, 2017 Total Capital (to risk weighted assets): Consolidated $ 163,592 13.19 % $ 114,751 9.25 % No t Bank 158,824 12.81 % 114,692 9.25 % $ 123,992 10.00 % Tier 1 Capital (to risk weighted assets): Consolidated 149,394 12.04 % 89,940 7.25 % Not applicable Bank 144,626 11.66 % 89,894 7.25 % 99,193 8.00 % Tier 1 Capital (to average assets): Consolidated 149,394 11.53 % 51,809 4.00 % Not applicable Bank 144,626 11.17 % 51,770 4.00 % 64,713 5.00 % Tier 1 Common Equity Ratio (to risk weighted assets): Consolidated 125,888 10.15 % 71,332 5.75 % Not applicable Bank 144,626 11.66 % 71,295 5.75 % 80,595 6.50 % December 31, 2016 Total Capital (to risk weighted assets): Consolidated $ 154,335 13.59 % $ 97,949 8.625 % Not applicable Bank 149,278 13.23 % 97,295 8.625 % $ 112,805 10.00 % Tier 1 Capital (to risk weighted assets): Consolidated 141,206 12.43 % 75,236 6.625 % Not applicable Bank 136,148 12.07 % 74,734 6.625 % 90,244 8.00 % Tier 1 Capital (to average assets): Consolidated 141,206 11.48 % 49,183 4.00 % Not applicable Bank 136,148 11.08 % 49,144 4.00 % 61,430 5.00 % Tier 1 Common Equity Ratio (to risk weighted assets): Consolidated 117,755 10.37 % 58,201 5.125 % Not applicable Bank 136,148 12.07 % 57,813 5.125 % 73,323 6.50 % (a) The ratios for September 30, 2017 and December 31, 2016 include a capital conservation buffer of 1.25% and 0.625%, respectively. The rules of the Basel III regulatory capital framework implemented a capital conservation buffer that is added to the minimum requirements for capital adequacy purposes. The capital conservation buffer is subject to a three year phase-in period that began on January 1, 2016 and will be fully phased in on January 1, 2019 at 2.5%. The required phase-in capital conservation buffer during 2017 is 1.25%. At the present time, the ratios for the Company and the Bank are sufficient to meet the fully phased-in conservation buffer.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	NOTE 11 – FAIR VALUE MEASUREMENTS ASC 820-10 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability is not adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are independent, knowledgeable, and both able and willing to transact. ASC 820-10 requires the use of valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable or unobservable. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, ASC 820-10 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1—Valuation is based on quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 1 assets and liabilities generally include debt and equity securities that are traded in an active exchange market. Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities. Level 2—Valuation is based on inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. The valuation may be based on quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability. Level 3—Valuation is based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which determination of fair value requires significant management judgment or estimation. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The following methods and assumptions were used by the Company in estimating the fair value disclosures for financial instruments: Cash and Cash Equivalents and Interest-Bearing Deposits in Banks The carrying amounts of cash and short-term instruments approximate fair values based on the short-term nature of the assets. Fair values of other interest-bearing deposits in banks are estimated using discounted cash flow analyses based on current rates for similar types of deposits. Securities Available for Sale Where quoted prices are available in an active market, the Company classifies the securities within Level 1 of the valuation hierarchy. Securities are defined as both long and short positions. Level 1 securities include highly liquid government bonds and exchange-traded equities. If quoted market prices are not available, the Company estimates fair values using pricing models and discounted cash flows that consider standard input factors such as observable market data, benchmark yields, interest rate volatilities, broker/dealer quotes and credit spreads. Examples of such instruments, which would generally be classified within Level 2 of the valuation hierarchy, include U.S. government and agency securities, corporate bonds and other securities. Mortgage-backed securities are included in Level 2 if observable inputs are available. In certain cases where there is limited activity or less transparency around inputs to the valuation, the Company classifies those securities in Level 3. Loans For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. Fair values for certain mortgage loans (e.g., one-to-four family residential), credit card loans, and other consumer loans are based on quoted market prices of similar loans sold in conjunction with securitization transactions, adjusted for differences in loan characteristics. Fair values for other loans (e.g., commercial and agricultural loans) are estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. Fair values for non-performing loans are estimated using discounted cash flow analyses or underlying collateral values, where applicable. Loans Held for Sale The carrying value of loans held for sale generally approximates fair value based on the short-term nature of the assets. If management identifies a loan held for sale that will ultimately sell at a value less than its carrying value, it is recorded at the estimated value. Loan Servicing Rights Fair value is based on market prices for comparable loan servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. Other Real Estate Owned Loans on which the underlying collateral has been repossessed are adjusted to fair value upon transfer to other real estate owned. Subsequently, other real estate owned is carried at the lower of carrying value or fair value. Fair value is based upon independent market prices, appraised values of the collateral, or management’s estimation of the value of the collateral. Due to the significance of the unobservable inputs, all other real estate owned is classified as Level 3. Deposits The fair values disclosed for demand deposits (e.g., interest and non-interest checking, statement savings, and certain types of money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). The carrying amounts of variable-rate, fixed-term money market accounts and certificates of deposit approximate their fair values at the reporting date. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. Other Borrowings The carrying amounts of federal funds purchased, other borrowings, and other short-term borrowings maturing within 90 days approximate their fair values. Advances from the Federal Home Loan Bank Current market rates for debt with similar terms and remaining maturities are used to estimate fair value of advances from the Federal Home Loan Bank (the “FHLB”). Fair values are estimated using discounted cash flow analyses based on current market rates for similar types of borrowing arrangements. Subordinated Debentures The fair values of these debt instruments utilize a discounted cash flow analysis based on an estimate of current interest rates being offered by instruments with similar terms and credit quality. Since the market for these instruments is limited, the internal evaluation represents a Level 3 measurement and approximates fair value. Accrued Interest The carrying amounts approximate fair value. Commitments to Extend Credit and Standby Letters of Credit As of September 30, 2017 and December 31, 2016, the carrying and fair values of the commitments to extend credit and standby letters of credit are not considered significant. Assets measured at fair value on a recurring basis are summarized below: Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value (dollars in thousands) September 30, 2017 Securities available for sale: Municipal securities $ — $ 37,879 $ — $ 37,879 Mortgage-backed securities — 69,363 — 69,363 Asset-backed securities — — — - Total assets at fair value $ — $ 107,242 $ — $ 107,242 December 31, 2016 Securities available for sale: U.S. government and agency securities $ — $ 1,000 $ — $ 1,000 Municipal securities — 45,456 — 45,456 Mortgage-backed securities — 73,308 — 73,308 Asset-backed securities — 3,673 — 3,673 Total assets at fair value $ — $ 123,437 $ — $ 123,437 Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, they are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following table presents the financial instruments carried on the consolidated balance sheet by caption and by level in the fair value hierarchy for which a nonrecurring change in fair value has been recorded: Level 1 Inputs Level 2 Inputs Level 3 Inputs Impairment Losses (dollars in thousands) September 30, 2017 Impaired loans $ — $ — $ 32,962 $ 1,127 Other real estate owned — — 6,974 85 Total assets at fair value $ — $ — $ 39,936 $ 1,212 December 31, 2016 Impaired loans $ — $ — $ 20,104 $ 1,336 Other real estate owned — — 3,161 480 Total assets at fair value $ — $ — $ 23,265 $ 1,816 The significant inputs used in the fair value measurements for Level 3 assets measured at fair value on a nonrecurring basis are as follows: September 30, 2017 Valuation Techniques Unobservable Inputs Range (Average) Impaired loans Evaluation of collateral Estimation of value NM* Other real estate owned Appraisal Appraisal adjustment 10%-41% (22%) December 31, 2016 Valuation Techniques Unobservable Inputs Range (Average) Impaired loans Evaluation of collateral Estimation of value NM* Other real estate owned Appraisal Appraisal adjustment 7%-39% (21%) * Not Meaningful. The estimated fair values, and related carrying or notional amounts, of the Company’s financial instruments are as follows: September 30, December 31, 2017 2016 Carrying Amount Fair Value Carrying Amount Fair Value Input Level (dollars in thousands) Financial assets: Cash and cash equivalents $ 71,795 $ 71,795 $ 42,679 $ 42,679 1 Securities available for sale 107,242 107,242 123,437 123,437 2 FHLB Stock 4,309 4,309 5,688 5,688 2 Loans, net of allowance for loan losses 1,112,976 1,117,970 1,017,841 1,022,391 3 Loans held for sale 2,054 2,054 1,162 1,162 3 Accrued interest receivable 3,847 3,847 3,151 3,151 2 Loan servicing rights 8,986 12,423 9,264 12,194 3 Financial liabilities: Deposits: Time 714,080 720,041 596,565 600,153 3 Other deposits 352,014 349,037 380,953 377,980 1 Other borrowings 1,352 1,352 2,152 2,152 3 Advances from FHLB 128,300 129,184 107,895 108,517 3 Subordinated debentures 15,506 15,506 15,451 15,451 3 Accrued interest payable 2,125 2,125 1,879 1,879 2

OTHER REAL ESTATE OWNED

OTHER REAL ESTATE OWNED	9 Months Ended
	Sep. 30, 2017
Banking And Thrift [Abstract]
OTHER REAL ESTATE OWNED	NOTE 12 – OTHER REAL ESTATE OWNED Changes in other real estate owned were as follows: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2017 2016 2017 2016 (dollars in thousands) Balance, beginning of period $ 6,917 $ 2,789 $ 3,161 $ 2,872 Assets foreclosed 268 — 4,779 159 Assets acquired — — — 1,951 Assets transferred from premises and equipment — 397 397 Write-down of other real estate owned (7 ) (250 ) (85 ) (334 ) Net gain on sales of other real estate owned (39 ) 32 363 121 Proceeds from sale of other real estate owned (165 ) (272 ) (1,244 ) (2,470 ) Balance, end of period $ 6,974 $ 2,696 $ 6,974 $ 2,696 Expenses (income) applicable to other real estate owned included in non-interest expense include the following: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2017 2016 2017 2016 (dollars in thousands) Net gain on sales of other real estate owned $ 39 $ (32 ) $ (363 ) $ (121 ) Write-down of other real estate owned 7 250 85 334 Operating expenses, net of rental income 30 41 99 120 $ 76 $ 259 $ (179 ) $ 333

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2017
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	NOTE 13 – SUBSEQUENT EVENTS Management evaluated subsequent events through the date the financial statements were issued. There were no significant events or transactions occurring after September 30, 2017, but prior to November 8, 2017, that provided additional evidence about conditions that existed at September 30, 2017.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements In March 2016, the FASB issued ASU No. 2016-09, Compensation – Stock Compensation to simplify several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The amendments in this update became effective beginning January 1, 2017 and did not have a significant impact the Company’s financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses, to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendment replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This amendment is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted for the fiscal year beginning after December 15, 2018, including interim periods within those fiscal years. Entities should apply this amendment as a modified-retrospective approach, through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. The Company has developed a steering committee to implement this ASU, and is currently in the process of evaluating which methodology we will apply to our loan portfolio. The steering committee is also interviewing third-party vendors that will provide consulting and software services. At this time, the effect this ASU will have on its consolidated financial statements is unknown. In January 2017, the FASB issued ASU No. 2017-04 Intangibles – Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment The Company early adopted this amendment effective January 1, 2017 for its goodwill impairment analysis. The result of this amendment had no impact on the Company since its goodwill is not impaired as of September 30, 2017. In March 2017, the FASB issued updated guidance codified within ASU No. 2017-08, Receivables – Nonrefundable Fees and Other Costs, which is intended to enhance the accounting for the amortization of premiums for purchased callable debt securities. The amendment is effective for fiscal years beginning after December 15, 2018, with early adoption permitted including adoption in an interim period. The Company is currently evaluating the effects this ASU will have on its consolidated financial statements. In May 2017, the FASB issued updated guidance codified within ASU No. 2017-09, Compensation – Stock Compensation to provide clarity and reduce the diversity in practice and cost and complexity of applying the guidance when there is a change of terms condition of share-based awards. The amendment is effective for fiscal years beginning after December 15, 2017, with early adoption permitted including adoption in an interim period. The adoption of this ASU is not expected to have a significant impact on the Company’s consolidated financial because modification to share-based awards are rarely made . In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share – Accounting for Certain Financial Instruments with Down Round Features to address the complexity of the accounting for equity-classified financial instruments with down round features. The amendment is effective for fiscal years beginning after December 15, 2019, with early adoption permitted including adoption in an interim period. The adoption of this ASU is not expected to have a significant impact on the Company’s consolidated financial because the Company does not issues equity-classified financial instruments with down round features.

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	Earnings per common share is computed using the two-class method. Basic earnings per common share is computed by dividing net income by the weighted-average number of common shares outstanding during the applicable period. Diluted earnings per share is computed using the weighted-average number of shares determined for the basic earnings per common share plus the dilutive effect of share-based compensation using the treasury stock method. For the Three Months Ended For the Nine Months Ended September 30, September 30, 2017 2016 2017 2016 (dollars in thousands) Net income from continuing operations $ 3,604 $ 3,102 $ 8,294 $ 7,223 Less: preferred stock dividends 91 80 257 261 Income available to common shareholders for basic earnings per common share $ 3,513 $ 3,022 $ 8,037 $ 6,962 Average number of common shares issued 7,333,799 7,310,944 7,327,268 6,951,282 Less: weighted average treasury shares 432,861 428,806 432,653 424,408 Less: weighted average nonvested equity incentive plan shares 256,638 357,708 271,338 367,357 Weighted average number of common shares outstanding 6,644,300 6,524,430 6,623,277 6,159,517 Effect of dilutive options 112,904 94,924 119,371 97,485 Weighted average number of common shares outstanding used to calculate diluted earnings per common share 6,757,204 6,619,354 6,742,648 6,257,002

SECURITIES AVAILABLE-FOR-SALE (

SECURITIES AVAILABLE-FOR-SALE (Tables)	9 Months Ended
	Sep. 30, 2017
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Value of Available for Sale of Securities	The amortized cost and fair value of securities available-for-sale as of September 30, 2017 and December 31, 2016 were as follows: Amortized Unrealized Unrealized Fair Cost Gains Losses Value (dollars in thousands) September 30, 2017 Municipal securities $ 37,772 $ 175 $ (68 ) $ 37,879 Mortgage-backed securities 69,515 291 (443 ) 69,363 Asset-backed securities — — — — $ 107,287 $ 466 $ (511 ) $ 107,242 December 31, 2016 U.S. government and agency securities $ 1,000 $ — $ — $ 1,000 Municipal securities 45,638 57 (239 ) 45,456 Mortgage-backed securities 73,648 292 (632 ) 73,308 Asset-backed securities 3,761 3 (91 ) 3,673 $ 124,047 $ 352 $ (962 ) $ 123,437
Schedule of Amortized Cost and Fair Value of Securities Available for Sale by Contractual Maturity	The amortized cost and fair value of securities at September 30, 2017 and December 31, 2016, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Fair Cost Value (dollars in thousands) September 30, 2017 Due in one year or less $ 9,553 $ 9,554 Due from one to five years 19,268 19,333 Due from five to ten years 8,951 8,992 Due after ten years — — Mortgage-backed securities 69,515 69,363 $ 107,287 $ 107,242 December 31, 2016 Due in one year or less $ 17,396 $ 17,311 Due from one to five years 25,960 25,912 Due from five to ten years 7,043 6,906 Due after ten years — — Mortgage-backed securities 73,648 73,308 $ 124,047 $ 123,437
Schedule of Fair Value and Gross Unrealized Losses of Entity's Investment	The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses that are not deemed to be other-than-temorarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at September 30, 2017 and December 31, 2016: Less Than 12 Months 12 Months or Greater Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses (dollars in thousands) September 30, 2017 Municipal securities $ 12,116 $ (50 ) $ 3,492 $ (18 ) $ 15,608 $ (68 ) Mortgage-backed securities 28,930 (221 ) 10,647 (222 ) 39,577 (443 ) Asset-backed securities — — — — — — $ 41,046 $ (271 ) $ 14,139 $ (240 ) $ 55,185 $ (511 ) December 31, 2016 U.S. government and agency securities $ — $ — $ — $ — $ — $ — Municipal securities 24,924 (236 ) 604 (3 ) 25,528 (239 ) Mortgage-backed securities 48,719 (632 ) — — 48,719 (632 ) Asset-backed securities 2,745 (91 ) — — 2,745 (91 ) $ 76,388 $ (959 ) $ 604 $ (3 ) $ 76,992 $ (962 )

LOANS (Tables)

LOANS (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Components of Loans	The components of loans were as follows: September 30, December 31, 2017 2016 (dollars in thousands) Agricultural loans $ 675,856 $ 624,632 Commercial real estate loans 290,420 270,475 Commercial loans 107,569 89,944 Residential real estate loans 52,527 45,276 Installment and consumer other 229 159 Total gross loans 1,126,601 1,030,486 Allowance for loan losses (13,625 ) (12,645 ) Loans, net $ 1,112,976 $ 1,017,841
Changes in Allowance for Loan Losses by Portfolio Segment	Changes in the allowance for loan losses by portfolio segment for the nine months ended September 30, 2017 and 2016 were as follows: September 30, 2017 Agricultural Commercial Real Estate Commercial Residential Real Estate Installment and Consumer Other Unallocated Total (dollars in thousands) Balance, beginning of year $ 8,173 $ 2,762 $ 1,239 $ 470 $ 1 $ — $ 12,645 Provision for loan losses 688 733 1,137 (241 ) 1 — 2,318 Loans charged off — (575 ) (917 ) — — — (1,492 ) Recoveries 43 80 31 — — — 154 Balance, end of period $ 8,904 $ 3,000 $ 1,490 $ 229 $ 2 $ — $ 13,625 September 30, 2016 Agricultural Commercial Real Estate Commercial Residential Real Estate Installment and Consumer Other Unallocated Total (dollars in thousands) Balance, beginning of year $ 6,355 $ 2,237 $ 1,268 $ 533 $ 12 $ — $ 10,405 Provision for loan losses 1,947 419 168 (118 ) (6 ) 6 2,416 Loans charged off (896 ) (50 ) (277 ) (5 ) (4 ) — (1,232 ) Recoveries 2 26 9 — — — 37 Balance, end of period $ 7,408 $ 2,632 $ 1,168 $ 410 $ 2 $ 6 $ 11,626
Balances in Allowance for Loan Losses and Recorded Balance in Loans by Portfolio Segment and Based on Impairment Method	The following tables present the balances in the allowance for loan losses and the recorded balance in loans by portfolio segment and based on impairment method as of September 30, 2017 and December 31, 2016: September 30, 2017 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (dollars in thousands) Allowance for loan losses: Agricultural loans $ 884 $ 8,020 $ 8,904 Commercial real estate loans 200 2,800 3,000 Commercial loans 43 1,447 1,490 Residential real estate loans — 229 229 Installment and consumer other — 2 2 Total ending allowance for loan losses 1,127 12,498 13,625 Loans: Agricultural loans 29,097 646,759 675,856 Commercial real estate loans 3,834 286,586 290,420 Commercial loans 1,158 106,411 107,569 Residential real estate loans — 52,527 52,527 Installment and consumer other — 229 229 Total loans 34,089 1,092,512 1,126,601 Net loans $ 32,962 $ 1,080,014 $ 1,112,976 December 31, 2016 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (dollars in thousands) Allowance for loan losses: Agricultural loans $ 546 $ 7,627 $ 8,173 Commercial real estate loans 377 2,385 2,762 Commercial loans 413 826 1,239 Residential real estate loans — 470 470 Installment and consumer other — 1 1 Total ending allowance for loan losses 1,336 11,309 12,645 Loans: Agricultural loans 13,044 611,588 624,632 Commercial real estate loans 4,952 265,523 270,475 Commercial loans 3,376 86,568 89,944 Residential real estate loans 68 45,208 45,276 Installment and consumer other — 159 159 Total loans 21,440 1,009,046 1,030,486 Net loans $ 20,104 $ 997,737 $ 1,017,841
Schedule of Aging of Recorded Investment in Past Due Loans	The following table presents the aging of the recorded investment in past due loans at September 30, 2017 and December 31, 2016: 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Loans Not Past Due (dollars in thousands) September 30, 2017 Agricultural loans $ 3,429 $ 258 $ 6,264 $ 9,951 $ 665,905 Commercial real estate loans — 624 2,892 3,516 286,904 Commercial loans 135 — 1,118 1,253 106,316 Residential real estate loans 3 — — 3 52,524 Installment and consumer other — — — — 229 Total $ 3,567 $ 882 $ 10,274 $ 14,723 $ 1,111,878 December 31, 2016 Agricultural loans $ 12 $ — $ 9,680 $ 9,692 $ 614,940 Commercial real estate loans — 287 2,710 2,997 267,478 Commercial loans 371 — 2,695 3,066 86,878 Residential real estate loans — — — — 45,276 Installment and consumer other — — — — 159 Total $ 383 $ 287 $ 15,085 $ 15,755 $ 1,014,731
Nonaccrual, Restructured and Certain Past Due Loans	The following table lists information on nonaccrual, restructured, and certain past due loans at September 30, 2017 and December 31, 2016: September 30, December 31, 2017 2016 (dollars in thousands) Nonaccrual loans, 90 days or more past due $ 10,274 $ 15,085 Nonaccrual loans 30-89 days past due 2,430 371 Nonaccrual loans, less than 30 days past due 158 4,651 Restructured loans not on nonaccrual status 8,087 4,300 90 days or more past due and still accruing — — Total 20,949 24,407
Recorded Investment in Nonaccrual and Loans Past Due 90 Days or More	The following table presents the recorded investment in nonaccrual loans and loans past due 90 days or more at September 30, 2017 and December 31, 2016: September 30, December 31, 2017 2016 (dollars in thousands) Agricultural loans $ 8,228 $ 12,323 Commercial real estate loans 3,516 4,340 Commercial loans 1,118 3,376 Residential real estate loans — 68 Total $ 12,862 $ 20,107
TDRs by Loan Class	The following table presents the TDRs by loan class at September 30, 2017 and December 31, 2016: Non-Accrual Restructured and Accruing Total (dollars in thousands) September 30, 2017 Agricultural loans $ 4,356 $ 7,729 $ 12,085 Commercial real estate loans 624 318 942 Commercial loans — 40 40 Total $ 4,980 $ 8,087 $ 13,067 December 31, 2016 Agricultural loans $ 7,947 $ 3,925 $ 11,872 Commercial real estate loans 1,400 325 1,725 Commercial loans 371 50 421 Total $ 9,718 $ 4,300 $ 14,018 The following table provides the number of loans modified in a troubled debt restructuring investment by class for the nine months ended September 30, 2017 and 2016: For the Nine Months Ended For the Nine Months Ended September 30, 2017 September 30, 2016 Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Troubled debt restructurings: Agricultural loans 16 $ 6,810 14 $ 8,704 Commercial real estate loans — — 2 553 Commercial loans — — 2 1,632 Total 16 $ 6,810 18 $ 10,889
Summary of Troubled Debt Restructurings Grouped by Type of Concession	The following table provides the troubled debt restructurings for the nine months ended September 30, 2017 and 2016 grouped by type of concession: For the Nine Months Ended For the Nine Months Ended September 30, 2017 September 30, 2016 Number of Loans Recorded Investment Number of Loans Recorded Investment (dollars in thousands) Agricultural loans Payment concessions 9 $ 5,581 6 $ 1,732 Extension of interest-only payments 6 908 5 1,243 Combination of extension of term and interest rate concessions 1 321 3 5,729 Commercial real estate loans Extension of interest-only payments — — 2 553 Commercial loans Extension of interest-only payments — — 2 1,632 Total 16 $ 6,810 18 $ 10,889
Risk Category of Loans by Class of Loans	Based on the most recent analysis performed by management, the risk category of loans by class of loans was as follows as of September 30, 2017 and December 31, 2016: As of September 30, 2017 Sound/ Acceptable/ Satisfactory/ Low Satisfactory Watch Special Mention Substandard Performing Substandard Impaired Total Loans (dollars in thousands) Agricultural loans $ 508,722 $ 100,993 $ 15,012 $ 41,923 9,206 $ 675,856 Commercial real estate loans 225,807 43,907 7,300 9,890 3,516 290,420 Commercial loans 88,132 12,741 1,144 4,434 1,118 107,569 Residential real estate loans 48,623 3,784 — — 120 52,527 Installment and consumer other 229 — — — — 229 Total $ 871,513 $ 161,425 $ 23,456 $ 56,247 $ 13,960 $ 1,126,601 As of December 31, 2016 Sound/ Acceptable/ Satisfactory/ Low Satisfactory Watch Special Mention Substandard Performing Substandard Impaired Total Loans (dollars in thousands) Agricultural loans $ 502,084 $ 84,801 $ 12,657 $ 12,046 $ 13,044 $ 624,632 Commercial real estate loans 225,038 27,368 378 12,739 4,952 270,475 Commercial loans 74,221 6,624 1,632 4,091 3,376 89,944 Residential real estate loans 40,556 4,151 501 — 68 45,276 Installment and consumer other 159 — — — — 159 Total $ 842,058 $ 122,944 $ 15,168 $ 28,876 $ 21,440 $ 1,030,486

LOAN SERVICING RIGHTS (Tables)

LOAN SERVICING RIGHTS (Tables)	9 Months Ended
	Sep. 30, 2017
Transfers And Servicing [Abstract]
Summary of Servicing Rights Capitalized and Amortized along with the Aggregate Activity in Related Valuation	The following summarizes servicing rights capitalized and amortized, along with the aggregate activity in related valuation allowances: September 30, December 31, 2017 2016 (dollars in thousands) Loan servicing rights: Balance, beginning of period $ 9,264 $ 8,145 Additions 1,831 4,794 Disposals (474 ) (1,552 ) Amortization (1,635 ) (2,123 ) Balance, end of period $ 8,986 $ 9,264

GOODWILL AND CORE DEPOSIT INT27

GOODWILL AND CORE DEPOSIT INTANGIBLE (Tables)	9 Months Ended
	Sep. 30, 2017
Core Deposit
Finite Lived Intangible Assets [Line Items]
Core Deposit Intangible	September 30, 2017 December 31, 2016 (dollars in thousands) Core deposit intangible: Gross carrying amount $ 1,801 $ 1,801 Accumulated amortization (763 ) (360 ) Net book value $ 1,038 $ 1,441 Additions during the period $ — $ 1,801

DEPOSITS (Tables)

DEPOSITS (Tables)	9 Months Ended
	Sep. 30, 2017
Banking And Thrift [Abstract]
Summary of Deposits	Deposits are summarized as follows at September 30, 2017 and December 31, 2016: September 30, December 31, 2017 2016 (dollars in thousands) Demand deposits $ 118,815 $ 118,657 Savings 233,199 262,296 Certificates of deposit 714,080 596,565 Total deposits $ 1,066,094 $ 977,518

ADVANCES FROM FHLB AND OTHER 29

ADVANCES FROM FHLB AND OTHER BORROWINGS (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Advances Outstanding from FHLB	The Bank had advances outstanding from the FHLB in the amount of $128.3 million and $107.9 million on September 30, 2017 and December 31, 2016, respectively. These advances, rates, and maturities were as follows: September 30, December 31, Maturity Rate 2017 2016 (dollars in thousands) Fixed rate, fixed term 01/03/2017 0.94 % $ — $ 595 Fixed rate, fixed term 02/27/2017 0.76 % — 5,000 Fixed rate, fixed term 03/15/2017 1.46 % — 2,000 Fixed rate, fixed term 06/16/2017 0.80 % — 10,000 Fixed rate, fixed term 08/11/2017 0.83 % — 5,000 Fixed rate, fixed term 11/15/2017 0.95 % 3,800 3,800 Fixed rate, fixed term 12/29/2017 1.27 % 3,000 3,000 Fixed rate, fixed term 01/02/2018 1.23 % 1,000 1,000 Fixed rate, fixed term 01/12/2018 0.85 % 8,000 8,000 Fixed rate, fixed term 02/12/2018 0.91 % 5,000 5,000 Fixed rate, fixed term 04/23/2018 1.07 % 2,300 2,300 Fixed rate, fixed term 06/18/2018 0.93 % 10,000 10,000 Fixed rate, fixed term 07/09/2018 1.41 % 15,000 — Fixed rate, fixed term 07/16/2018 1.21 % 762 762 Fixed rate, fixed term 07/16/2018 1.21 % 1,038 1,038 Fixed rate, fixed term 08/20/2018 1.15 % 1,000 1,000 Fixed rate, fixed term 08/20/2018 1.15 % 800 800 Fixed rate, fixed term 08/20/2018 1.27 % 2,200 2,200 Fixed rate, fixed term 11/09/2018 1.47 % 10,000 — Fixed rate, fixed term 12/31/2018 1.65 % 3,000 3,000 Fixed rate, fixed term 02/27/2019 1.47 % 5,000 5,000 Fixed rate, fixed term 03/08/2019 1.54 % 10,000 — Fixed rate, fixed term 07/15/2019 1.11 % 8,000 8,000 Fixed rate, fixed term 08/14/2019 1.77 % 2,000 2,000 Fixed rate, fixed term 02/20/2020 1.71 % 5,000 5,000 Fixed rate, fixed term 07/16/2020 1.85 % 800 800 Fixed rate, fixed term 08/25/2020 1.84 % 3,000 3,000 Fixed rate, fixed term 08/27/2020 1.88 % 5,000 5,000 Fixed rate, fixed term 12/30/2020 2.09 % 4,000 4,000 Fixed rate, fixed term 12/31/2020 1.94 % 600 600 Fixed rate, fixed term 04/12/2021 1.92 % 8,000 — Fixed rate, fixed term 06/15/2021 1.39 % 5,000 5,000 Fixed rate, fixed term 08/16/2021 2.29 % 3,000 3,000 Fixed rate, fixed term 12/30/2021 2.29 % 2,000 2,000 $ 128,300 $ 107,895
Future Maturities of Borrowings	Future maturities of borrowings were as follows: September 30, December 31, 2017 2016 (dollars in thousands) 1 year or less $ 53,900 $ 29,395 1 to 2 years 38,000 35,100 2 to 3 years 13,800 15,000 3 to 4 years 20,600 18,400 Over 4 years 2,000 10,000 $ 128,300 $ 107,895
Balances and Interest Rates on Other Borrowings	The following table sets forth information concerning balances and interest rates on other borrowings as of and for the periods indicated: September 30, December 31, 2017 2016 (dollars in thousands) Balance outstanding at end of period $ 1,352 $ 2,152 Average amount outstanding during the period 1,618 3,047 Maximum amount outstanding at any month end 1,825 3,930 Weighted average interest rate during the period 5.84 % 5.30 % Weighted average interest rate at end of period 6.20 % 5.32 %

EQUITY INCENTIVE PLAN (Tables)

EQUITY INCENTIVE PLAN (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Status and Changes in Stock Option 2016 Plan	The status of the Plan as of September 30, 2017 and changes in the Plan during the nine months ended September 30, 2017 were as follows: September 30, 2017 Number of Options Weighted-Average Exercise Price Aggregate Intrinsic Value (1) (dollars in thousands except option and per share data) Outstanding, beginning of year 291,059 $ 15.18 Granted 24,653 26.27 Exercised (65,026 ) 12.68 Forfeited/expired (4,868 ) 21.69 Outstanding, end of period 245,818 $ 16.83 $ 3,250 Options exercisable at period-end 159,329 $ 14.67 $ 2,450 Weighted-average fair value of options granted during the period (2) $ 9.54 (1) The aggregate intrinsic value of a stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on September 30, 2017. This amount changes based on changes in the market value of the Company’s stock. (2) The fair value (present value of the estimated future benefit to the option holder) of each option grant is estimated on the date of grant using the Black-Scholes option pricing model.
Activity in Restricted Stock Awards and Restricted Stock Units	Activity in restricted stock awards (“RSA”) and restricted stock units (“RSU”) for the nine months ended September 30, 2017 was as follows: September 30, 2017 RSAs Weighted Average Grant Price Outstanding, beginning of year 38,593 $ 17.27 Granted 5,988 27.31 Vested (2,416 ) 19.77 Forfeited/expired (948 ) 27.31 Outstanding, end of period 41,217 $ 18.35 September 30, 2017 RSUs Weighted Average Grant Price Outstanding, beginning of year — $ — Granted 8,691 25.53 Vested — — Forfeited/expired — — Outstanding, end of period 8,691 $ 25.53

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	9 Months Ended
	Sep. 30, 2017
Regulatory Capital Requirements [Abstract]
Summary of Actual Capital Amount and Ratio of Company's and Bank's	The Company’s and the Bank’s actual capital amounts and ratios are presented in the following table: Actual Minimum For Capital Adequacy Purposes (a) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) September 30, 2017 Total Capital (to risk weighted assets): Consolidated $ 163,592 13.19 % $ 114,751 9.25 % No t Bank 158,824 12.81 % 114,692 9.25 % $ 123,992 10.00 % Tier 1 Capital (to risk weighted assets): Consolidated 149,394 12.04 % 89,940 7.25 % Not applicable Bank 144,626 11.66 % 89,894 7.25 % 99,193 8.00 % Tier 1 Capital (to average assets): Consolidated 149,394 11.53 % 51,809 4.00 % Not applicable Bank 144,626 11.17 % 51,770 4.00 % 64,713 5.00 % Tier 1 Common Equity Ratio (to risk weighted assets): Consolidated 125,888 10.15 % 71,332 5.75 % Not applicable Bank 144,626 11.66 % 71,295 5.75 % 80,595 6.50 % December 31, 2016 Total Capital (to risk weighted assets): Consolidated $ 154,335 13.59 % $ 97,949 8.625 % Not applicable Bank 149,278 13.23 % 97,295 8.625 % $ 112,805 10.00 % Tier 1 Capital (to risk weighted assets): Consolidated 141,206 12.43 % 75,236 6.625 % Not applicable Bank 136,148 12.07 % 74,734 6.625 % 90,244 8.00 % Tier 1 Capital (to average assets): Consolidated 141,206 11.48 % 49,183 4.00 % Not applicable Bank 136,148 11.08 % 49,144 4.00 % 61,430 5.00 % Tier 1 Common Equity Ratio (to risk weighted assets): Consolidated 117,755 10.37 % 58,201 5.125 % Not applicable Bank 136,148 12.07 % 57,813 5.125 % 73,323 6.50 % (a) The ratios for September 30, 2017 and December 31, 2016 include a capital conservation buffer of 1.25% and 0.625%, respectively.

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets measured at fair value on a recurring basis are summarized below: Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value (dollars in thousands) September 30, 2017 Securities available for sale: Municipal securities $ — $ 37,879 $ — $ 37,879 Mortgage-backed securities — 69,363 — 69,363 Asset-backed securities — — — - Total assets at fair value $ — $ 107,242 $ — $ 107,242 December 31, 2016 Securities available for sale: U.S. government and agency securities $ — $ 1,000 $ — $ 1,000 Municipal securities — 45,456 — 45,456 Mortgage-backed securities — 73,308 — 73,308 Asset-backed securities — 3,673 — 3,673 Total assets at fair value $ — $ 123,437 $ — $ 123,437
Financial Instruments Carried on Consolidated Balance Sheet for Which Nonrecurring Change in Fair Value Has Been Recorded	The following table presents the financial instruments carried on the consolidated balance sheet by caption and by level in the fair value hierarchy for which a nonrecurring change in fair value has been recorded: Level 1 Inputs Level 2 Inputs Level 3 Inputs Impairment Losses (dollars in thousands) September 30, 2017 Impaired loans $ — $ — $ 32,962 $ 1,127 Other real estate owned — — 6,974 85 Total assets at fair value $ — $ — $ 39,936 $ 1,212 December 31, 2016 Impaired loans $ — $ — $ 20,104 $ 1,336 Other real estate owned — — 3,161 480 Total assets at fair value $ — $ — $ 23,265 $ 1,816
Significant Inputs Used in Fair Value Measurements for Level 3 Assets Measured on Nonrecurring Basis	The significant inputs used in the fair value measurements for Level 3 assets measured at fair value on a nonrecurring basis are as follows: September 30, 2017 Valuation Techniques Unobservable Inputs Range (Average) Impaired loans Evaluation of collateral Estimation of value NM* Other real estate owned Appraisal Appraisal adjustment 10%-41% (22%) December 31, 2016 Valuation Techniques Unobservable Inputs Range (Average) Impaired loans Evaluation of collateral Estimation of value NM* Other real estate owned Appraisal Appraisal adjustment 7%-39% (21%)
Estimated Fair Values and Related Carrying or Notional Amounts of Financial Instruments	The estimated fair values, and related carrying or notional amounts, of the Company’s financial instruments are as follows: September 30, December 31, 2017 2016 Carrying Amount Fair Value Carrying Amount Fair Value Input Level (dollars in thousands) Financial assets: Cash and cash equivalents $ 71,795 $ 71,795 $ 42,679 $ 42,679 1 Securities available for sale 107,242 107,242 123,437 123,437 2 FHLB Stock 4,309 4,309 5,688 5,688 2 Loans, net of allowance for loan losses 1,112,976 1,117,970 1,017,841 1,022,391 3 Loans held for sale 2,054 2,054 1,162 1,162 3 Accrued interest receivable 3,847 3,847 3,151 3,151 2 Loan servicing rights 8,986 12,423 9,264 12,194 3 Financial liabilities: Deposits: Time 714,080 720,041 596,565 600,153 3 Other deposits 352,014 349,037 380,953 377,980 1 Other borrowings 1,352 1,352 2,152 2,152 3 Advances from FHLB 128,300 129,184 107,895 108,517 3 Subordinated debentures 15,506 15,506 15,451 15,451 3 Accrued interest payable 2,125 2,125 1,879 1,879 2

OTHER REAL ESTATE OWNED (Tables

OTHER REAL ESTATE OWNED (Tables)	9 Months Ended
	Sep. 30, 2017
Banking And Thrift [Abstract]
Schedule of Other Real Estate Owned	Changes in other real estate owned were as follows: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2017 2016 2017 2016 (dollars in thousands) Balance, beginning of period $ 6,917 $ 2,789 $ 3,161 $ 2,872 Assets foreclosed 268 — 4,779 159 Assets acquired — — — 1,951 Assets transferred from premises and equipment — 397 397 Write-down of other real estate owned (7 ) (250 ) (85 ) (334 ) Net gain on sales of other real estate owned (39 ) 32 363 121 Proceeds from sale of other real estate owned (165 ) (272 ) (1,244 ) (2,470 ) Balance, end of period $ 6,974 $ 2,696 $ 6,974 $ 2,696
Expenses (Income) Applicable to Other Real Estate Owned Included in Non-Interest Expense	Expenses (income) applicable to other real estate owned included in non-interest expense include the following: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2017 2016 2017 2016 (dollars in thousands) Net gain on sales of other real estate owned $ 39 $ (32 ) $ (363 ) $ (121 ) Write-down of other real estate owned 7 250 85 334 Operating expenses, net of rental income 30 41 99 120 $ 76 $ 259 $ (179 ) $ 333

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017USD ($)
Accounting Policies [Abstract]
Impairment charge to goodwill	$ 0

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income from continuing operations	$ 3,604	$ 3,102	$ 8,294	$ 7,223
Less: preferred stock dividends	91	80	257	261
Income available to common shareholders for basic earnings per common share	$ 3,513	$ 3,022	$ 8,037	$ 6,962
Average number of common shares issued	7,333,799	7,310,944	7,327,268	6,951,282
Less: weighted average treasury shares	432,861	428,806	432,653	424,408
Less: weighted average nonvested equity incentive plan shares	256,638	357,708	271,338	367,357
Weighted average number of common shares outstanding	6,644,300	6,524,430	6,623,277	6,159,517
Effect of dilutive options	112,904	94,924	119,371	97,485
Weighted average number of common shares outstanding used to calculate diluted earnings per common share	6,757,204	6,619,354	6,742,648	6,257,002

Securities Available-for-Sale -

Securities Available-for-Sale - Schedule of Amortized Cost and Fair Value of Available for Sale of Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 107,287	$ 124,047
Unrealized Gains	466	352
Unrealized Losses	(511)	(962)
Fair Value	107,242	123,437
Municipal securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	37,772	45,638
Unrealized Gains	175	57
Unrealized Losses	(68)	(239)
Fair Value	37,879	45,456
Mortgage-backed securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	69,515	73,648
Unrealized Gains	291	292
Unrealized Losses	(443)	(632)
Fair Value	$ 69,363	73,308
Asset-backed securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		3,761
Unrealized Gains		3
Unrealized Losses		(91)
Fair Value		3,673
U.S. Government and Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		1,000
Fair Value		$ 1,000

Securities Available-for-Sale37

Securities Available-for-Sale - Schedule of Amortized Cost and Fair Value of Securities Available for Sale by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available For Sale Securities [Abstract]
Due in one year or less, Amortized Cost	$ 9,553	$ 17,396
Due from one to five years, Amortized Cost	19,268	25,960
Due from five to ten years, Amortized Cost	8,951	7,043
Due after ten years, Amortized Cost	0	0
Mortgage-backed securities, Amortized Cost	69,515	73,648
Amortized Cost	107,287	124,047
Due in one year or less, Fair Value	9,554	17,311
Due from one to five years, Fair Value	19,333	25,912
Due from five to ten years, Fair Value	8,992	6,906
Due after ten years, Fair Value	0	0
Mortgage-backed securities, Fair Value	69,363	73,308
Fair Value	$ 107,242	$ 123,437

Securities Available-for-Sale38

Securities Available-for-Sale - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Proceeds from sales of securities available for sale	$ 3,389,000	$ 0
Gross loss realized on sale of securities available for sale	37,000
FHLB Stock, at cost	4,309,000		$ 5,688,000
Reported Value Measurement
Schedule Of Available For Sale Securities [Line Items]
FHLB Stock, at cost	4,300,000		5,700,000
Reported Value Measurement | Collateralized FHLB Advances
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities Pledged as Collateral	0		0
Reported Value Measurement | Federal Reserve Bank Line Of Credit
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 8,500,000		$ 11,200,000

Securities Available-for-Sale39

Securities Available-for-Sale - Schedule of Fair Value and Gross Unrealized Losses of Entity's Investments (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Investments with unrealized losses less than 12 months, fair value	$ 41,046	$ 76,388
Investments with unrealized losses less than 12 months, unrealized losses	(271)	(959)
Investments with unrealized losses 12 months or greater, fair value	14,139	604
Investments with unrealized losses 12 months or greater, unrealized losses	(240)	(3)
Investments with unrealized losses, fair value	55,185	76,992
Investments with unrealized losses, unrealized losses	(511)	(962)
Municipal securities
Schedule Of Available For Sale Securities [Line Items]
Investments with unrealized losses less than 12 months, fair value	12,116	24,924
Investments with unrealized losses less than 12 months, unrealized losses	(50)	(236)
Investments with unrealized losses 12 months or greater, fair value	3,492	604
Investments with unrealized losses 12 months or greater, unrealized losses	(18)	(3)
Investments with unrealized losses, fair value	15,608	25,528
Investments with unrealized losses, unrealized losses	(68)	(239)
Mortgage-backed securities
Schedule Of Available For Sale Securities [Line Items]
Investments with unrealized losses less than 12 months, fair value	28,930	48,719
Investments with unrealized losses less than 12 months, unrealized losses	(221)	(632)
Investments with unrealized losses 12 months or greater, fair value	10,647
Investments with unrealized losses 12 months or greater, unrealized losses	(222)
Investments with unrealized losses, fair value	39,577	48,719
Investments with unrealized losses, unrealized losses	$ (443)	(632)
Asset-backed securities
Schedule Of Available For Sale Securities [Line Items]
Investments with unrealized losses less than 12 months, fair value		2,745
Investments with unrealized losses less than 12 months, unrealized losses		(91)
Investments with unrealized losses, fair value		2,745
Investments with unrealized losses, unrealized losses		$ (91)

Loans - Components of Loans (De

Loans - Components of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Loans And Leases Receivable Net Reported Amount [Abstract]
Agricultural loans	$ 675,856	$ 624,632
Commercial real estate loans	290,420	270,475
Commercial loans	107,569	89,944
Residential real estate loans	52,527	45,276
Installment and consumer other	229	159
Total gross loans	1,126,601	1,030,486
Allowance for loan losses	(13,625)	(12,645)	$ (11,626)	$ (10,405)
Loans, net	$ 1,112,976	$ 1,017,841

Loans - Changes in Allowance fo

Loans - Changes in Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accounts Notes And Loans Receivable [Line Items]
Balance, beginning of year	$ 12,645	$ 10,405
Provision for loan losses	2,318	2,416
Loans charged off	(1,492)	(1,232)
Recoveries	154	37
Balance, end of period	13,625	11,626
Agricultural
Accounts Notes And Loans Receivable [Line Items]
Balance, beginning of year	8,173	6,355
Provision for loan losses	688	1,947
Loans charged off		(896)
Recoveries	43	2
Balance, end of period	8,904	7,408
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Balance, beginning of year	2,762	2,237
Provision for loan losses	733	419
Loans charged off	(575)	(50)
Recoveries	80	26
Balance, end of period	3,000	2,632
Commercial
Accounts Notes And Loans Receivable [Line Items]
Balance, beginning of year	1,239	1,268
Provision for loan losses	1,137	168
Loans charged off	(917)	(277)
Recoveries	31	9
Balance, end of period	1,490	1,168
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Balance, beginning of year	470	533
Provision for loan losses	(241)	(118)
Loans charged off		(5)
Balance, end of period	229	410
Installment And Consumer Other
Accounts Notes And Loans Receivable [Line Items]
Balance, beginning of year	1	12
Provision for loan losses	1	(6)
Loans charged off		(4)
Balance, end of period	$ 2	2
Unallocated
Accounts Notes And Loans Receivable [Line Items]
Provision for loan losses		6
Balance, end of period		$ 6

Loans - Balances in Allowance f

Loans - Balances in Allowance for Loan Losses and Recorded Balance in Loans by Portfolio Segment and Based on Impairment Method (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 32,962	$ 20,104
Loans collectively evaluated for impairment	1,080,014	997,737
Loans, net	1,112,976	1,017,841
Allowance for loan losses:
Allowance for loan losses individually evaluated for impairment	1,127	1,336
Allowance for loan losses collectively evaluated for impairment	12,498	11,309
Total	13,625	12,645
Loans:
Loans individually evaluated for impairment	34,089	21,440
Loans collectively evaluated for impairment	1,092,512	1,009,046
Total gross loans	1,126,601	1,030,486
Agricultural Loans
Allowance for loan losses:
Allowance for loan losses individually evaluated for impairment	884	546
Allowance for loan losses collectively evaluated for impairment	8,020	7,627
Total	8,904	8,173
Loans:
Loans individually evaluated for impairment	29,097	13,044
Loans collectively evaluated for impairment	646,759	611,588
Total gross loans	675,856	624,632
Commercial Real Estate Loans
Allowance for loan losses:
Allowance for loan losses individually evaluated for impairment	200	377
Allowance for loan losses collectively evaluated for impairment	2,800	2,385
Total	3,000	2,762
Loans:
Loans individually evaluated for impairment	3,834	4,952
Loans collectively evaluated for impairment	286,586	265,523
Total gross loans	290,420	270,475
Commercial Loans
Allowance for loan losses:
Allowance for loan losses individually evaluated for impairment	43	413
Allowance for loan losses collectively evaluated for impairment	1,447	826
Total	1,490	1,239
Loans:
Loans individually evaluated for impairment	1,158	3,376
Loans collectively evaluated for impairment	106,411	86,568
Total gross loans	107,569	89,944
Residential Real Estate Loans
Allowance for loan losses:
Allowance for loan losses collectively evaluated for impairment	229	470
Total	229	470
Loans:
Loans individually evaluated for impairment		68
Loans collectively evaluated for impairment	52,527	45,208
Total gross loans	52,527	45,276
Installment and consumer other
Allowance for loan losses:
Allowance for loan losses collectively evaluated for impairment	2	1
Total	2	1
Loans:
Loans collectively evaluated for impairment	229	159
Total gross loans	$ 229	$ 159

Loans - Schedule of Aging of Re

Loans - Schedule of Aging of Recorded Investment in Past Due Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	$ 14,723	$ 15,755
Loans Not Past Due	1,111,878	1,014,731
Financing Receivables 30 To 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	3,567	383
Financing Receivables 60 To 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	882	287
Financing Receivables Equal To Greater Than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	10,274	15,085
Agricultural Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	9,951	9,692
Loans Not Past Due	665,905	614,940
Agricultural Loans | Financing Receivables 30 To 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	3,429	12
Agricultural Loans | Financing Receivables 60 To 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	258
Agricultural Loans | Financing Receivables Equal To Greater Than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	6,264	9,680
Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	3,516	2,997
Loans Not Past Due	286,904	267,478
Commercial Real Estate Loans | Financing Receivables 60 To 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	624	287
Commercial Real Estate Loans | Financing Receivables Equal To Greater Than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	2,892	2,710
Commercial Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,253	3,066
Loans Not Past Due	106,316	86,878
Commercial Loans | Financing Receivables 30 To 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	135	371
Commercial Loans | Financing Receivables Equal To Greater Than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	1,118	2,695
Residential Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	3
Loans Not Past Due	52,524	45,276
Residential Real Estate Loans | Financing Receivables 30 To 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Past Due	3
Installment and consumer other
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	$ 229	$ 159

Loans - Nonaccrual, Restructure

Loans - Nonaccrual, Restructured and Certain Past Due Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	$ 12,862	$ 20,107
Restructured loans not on nonaccrual status	8,087	4,300
Total	20,949	24,407
Financing Receivables Equal To Greater Than 90 Days Past Due
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	10,274	15,085
Financing Receivables 30 To 89 Days Past Due
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	2,430	371
Financing Receivables 1 To 29 Days Past Due
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	$ 158	$ 4,651

Loans - Recorded Investment in

Loans - Recorded Investment in Nonaccrual Loans and Loans Past Due 90 Days or More (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment in nonaccrual and loans past due 90 days or more	$ 12,862	$ 20,107
Agricultural Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment in nonaccrual and loans past due 90 days or more	8,228	12,323
Commercial Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment in nonaccrual and loans past due 90 days or more	3,516	4,340
Commercial Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment in nonaccrual and loans past due 90 days or more	$ 1,118	3,376
Residential Real Estate Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment in nonaccrual and loans past due 90 days or more		$ 68

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Average recorded investment in total impaired loans	$ 27,800,000	$ 25,900,000
Impaired loans on nonaccrual and restructured loans that are past due and still accruing	90 days
Interest income recognized on total impaired loans	$ 300,000	400,000
Interest income recognized for nonaccrual loans	700,000	1,500,000
Specific reserve to customers whose loan terms have been modified in TDR	800,000	500,000
Additional lending commitments to customers with outstanding loans that are classified as TDRs	0	0
Minimum exposure for annual internal credit review	300,000
TDR Loans
Accounts Notes And Loans Receivable [Line Items]
TDR loans, unfunded commitments	$ 0	$ 0

Loans - TDRs by Loan Class (Det

Loans - TDRs by Loan Class (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	$ 12,862	$ 20,107
Restructured and Accruing	8,087	4,300
Total	6,810		$ 10,889
TDR Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	4,980	9,718
Restructured and Accruing	8,087	4,300
Total	13,067	14,018
Agricultural Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	8,228	12,323
Total	6,810		8,704
Agricultural Loans | TDR Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	4,356	7,947
Restructured and Accruing	7,729	3,925
Total	12,085	11,872
Commercial Real Estate Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	3,516	4,340
Total			553
Commercial Real Estate Loans | TDR Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	624	1,400
Restructured and Accruing	318	325
Total	942	1,725
Commercial Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due	1,118	3,376
Total			$ 1,632
Commercial Loans | TDR Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Nonaccrual loans, past due		371
Restructured and Accruing	40	50
Total	$ 40	$ 421

Loans - Number of Loans Modifie

Loans - Number of Loans Modified in Troubled Debt Restructuring Investment by Class (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)Loan	Sep. 30, 2016USD ($)Loan
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | Loan	16	18
Recorded Investment | $	$ 6,810	$ 10,889
Agricultural Loans
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | Loan	16	14
Recorded Investment | $	$ 6,810	$ 8,704
Commercial Real Estate Loans
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | Loan		2
Recorded Investment | $		$ 553
Commercial Loans
Accounts Notes And Loans Receivable [Line Items]
Number of Loans | Loan		2
Recorded Investment | $		$ 1,632

Loans - Summary of Troubled Deb

Loans - Summary of Troubled Debt Restructurings Grouped by Type of Concession (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)Loan	Sep. 30, 2016USD ($)Loan
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan	16	18
Recorded Investment | $	$ 6,810	$ 10,889
Agricultural Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan	16	14
Recorded Investment | $	$ 6,810	$ 8,704
Agricultural Loans | Payment Concessions
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan	9	6
Recorded Investment | $	$ 5,581	$ 1,732
Agricultural Loans | Extension of Interest-Only Payments
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan	6	5
Recorded Investment | $	$ 908	$ 1,243
Agricultural Loans | Combination of Extension of Term and Interest Rate Concessions
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan	1	3
Recorded Investment | $	$ 321	$ 5,729
Commercial Real Estate Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan		2
Recorded Investment | $		$ 553
Commercial Real Estate Loans | Extension of Interest-Only Payments
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan		2
Recorded Investment | $		$ 553
Commercial Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan		2
Recorded Investment | $		$ 1,632
Commercial Loans | Extension of Interest-Only Payments
Financing Receivable Allowance For Credit Losses [Line Items]
Number of Loans | Loan		2
Recorded Investment | $		$ 1,632

Loans - Risk Category of Loans

Loans - Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Long Term Debt [Line Items]
Agricultural loans	$ 675,856	$ 624,632
Commercial real estate loans	290,420	270,475
Commercial loans	107,569	89,944
Residential real estate loans	52,527	45,276
Installment and consumer other	229	159
Total gross loans	1,126,601	1,030,486
Sound/ Acceptable/ Satisfactory/ Low Satisfactory
Long Term Debt [Line Items]
Agricultural loans	508,722	502,084
Commercial real estate loans	225,807	225,038
Commercial loans	88,132	74,221
Residential real estate loans	48,623	40,556
Installment and consumer other	229	159
Total gross loans	871,513	842,058
Watch
Long Term Debt [Line Items]
Agricultural loans	100,993	84,801
Commercial real estate loans	43,907	27,368
Commercial loans	12,741	6,624
Residential real estate loans	3,784	4,151
Total gross loans	161,425	122,944
Special Mention
Long Term Debt [Line Items]
Agricultural loans	15,012	12,657
Commercial real estate loans	7,300	378
Commercial loans	1,144	1,632
Residential real estate loans		501
Total gross loans	23,456	15,168
Substandard Performing
Long Term Debt [Line Items]
Agricultural loans	41,923	12,046
Commercial real estate loans	9,890	12,739
Commercial loans	4,434	4,091
Total gross loans	56,247	28,876
Substandard Impaired
Long Term Debt [Line Items]
Agricultural loans	9,206	13,044
Commercial real estate loans	3,516	4,952
Commercial loans	1,118	3,376
Residential real estate loans	120	68
Total gross loans	$ 13,960	$ 21,440

Loan Servicing Rights - Additio

Loan Servicing Rights - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance of mortgage	$ 594.6	$ 577
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate	10.00%
Level 3 Inputs
Servicing Assets at Fair Value [Line Items]
Loan servicing rights, fair value	$ 12.4	$ 12.2
Minimum
Servicing Assets at Fair Value [Line Items]
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, Prepayment speed	4.00%
Maximum
Servicing Assets at Fair Value [Line Items]
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, Prepayment speed	9.00%

Loan Servicing Rights - Summary

Loan Servicing Rights - Summary of Servicing Rights Capitalized and Amortized along with the Aggregate Activity in Related Valuation (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Transfers And Servicing [Abstract]
Balance, beginning of period	$ 9,264	$ 8,145
Additions	1,831	4,794
Disposals	(474)	(1,552)
Amortization	(1,635)	(2,123)
Balance, end of period	$ 8,986	$ 9,264

Goodwill and Core Deposit Int53

Goodwill and Core Deposit Intangible - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 5,038	$ 5,038
Fox River Valley
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 5,000	5,000
Core Deposit
Goodwill And Intangible Assets [Line Items]
Intangible assets, amortization period on accelerated basis	66 months
Accumulated amortization	$ 403	360
Core Deposit | Fox River Valley
Goodwill And Intangible Assets [Line Items]
Gross carrying amount of intangible assets	1,801	1,801
Accumulated amortization	$ 763	$ 360

Goodwill and Core Deposit Int54

Goodwill and Core Deposit Intangible - Core Deposit Intangible (Detail) - Core Deposit - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2017
Core deposit intangible:
Accumulated amortization	$ (360)	$ (403)
Net book value	1,441	1,038
Fox River Valley
Core deposit intangible:
Gross carrying amount	1,801	1,801
Accumulated amortization	(360)	(763)
Net book value	1,441	$ 1,038
Additions during the period	$ 1,801

Deposits - Summary of Deposits

Deposits - Summary of Deposits (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Deposits [Abstract]
Demand deposits	$ 118,815	$ 118,657
Savings	233,199	262,296
Certificates of deposit	714,080	596,565
Total deposits	$ 1,066,094	$ 977,518

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Deposits [Abstract]
Brokered deposits	$ 281.2	$ 193.6

Advances From FHLB and Other 57

Advances From FHLB and Other Borrowings - Additional Information (Detail) - USD ($)	Sep. 14, 2017	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Advances from FHLB		$ 128,300,000	$ 107,895,000
Irrevocable letters of credit		0	0
Other borrowings		1,352,000	2,152,000
Fox River Valley
Debt Instrument [Line Items]
Capital lease monthly rental payments		$ 15,000
Lease expiration date		Apr. 30, 2018
Capital lease obligations		$ 81,000	189,000
Amortization of capital lease		109,000	65,000
Collateralized Loan Obligations
Debt Instrument [Line Items]
Other borrowings		1,300,000	2,000,000
Federal Reserve Bank Of Chicago
Debt Instrument [Line Items]
Available line-of-credit		50,000,000	50,000,000
Other borrowings		0	0
Federal Reserve Bank Of Chicago | Securities Pledged as Collateral
Debt Instrument [Line Items]
Available line-of-credit		8,500,000	$ 11,200,000
U.S. Bank National Association | Revolving Line-of-Credit Facility
Debt Instrument [Line Items]
Line of credit facility agreement date	Sep. 14, 2017
Line of credit facility maximum borrowing capacity	$ 15,000,000
Line of credit, non-usage fee percentage per annum	0.275%
Line of credit amount outstanding		$ 0
U.S. Bank National Association | Revolving Line-of-Credit Facility | One month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%

Advances from FHLB and Other 58

Advances from FHLB and Other Borrowings - Advances Outstanding from FHLB (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Advances from FHLB	$ 128,300	$ 107,895
Fixed rate, short term, Advance for FHLB, 1
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jan. 3, 2017
Advances from FHLB, Rate	0.94%
Advances from FHLB		595
Fixed rate, fixed term, Advance for FHLB, 2
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Feb. 27, 2017
Advances from FHLB, Rate	0.76%
Advances from FHLB		5,000
Fixed rate, fixed term, Advance for FHLB, 3
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Mar. 15, 2017
Advances from FHLB, Rate	1.46%
Advances from FHLB		2,000
Fixed rate, fixed term, Advance for FHLB, 4
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jun. 16, 2017
Advances from FHLB, Rate	0.80%
Advances from FHLB		10,000
Fixed rate, fixed term, Advance for FHLB, 5
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 11, 2017
Advances from FHLB, Rate	0.83%
Advances from FHLB		5,000
Fixed rate, fixed term, Advance for FHLB, 6
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Nov. 15, 2017
Advances from FHLB, Rate	0.95%
Advances from FHLB	$ 3,800	3,800
Fixed rate, fixed term, Advance for FHLB, 7
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Dec. 29, 2017
Advances from FHLB, Rate	1.27%
Advances from FHLB	$ 3,000	3,000
Fixed rate, fixed term, Advance for FHLB, 8
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jan. 2, 2018
Advances from FHLB, Rate	1.23%
Advances from FHLB	$ 1,000	1,000
Fixed rate, fixed term, Advance for FHLB, 9
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jan. 12, 2018
Advances from FHLB, Rate	0.85%
Advances from FHLB	$ 8,000	8,000
Fixed rate, fixed term, Advance for FHLB, 10
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Feb. 12, 2018
Advances from FHLB, Rate	0.91%
Advances from FHLB	$ 5,000	5,000
Fixed rate, fixed term, Advance for FHLB, 11
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Apr. 23, 2018
Advances from FHLB, Rate	1.07%
Advances from FHLB	$ 2,300	2,300
Fixed rate, fixed term, Advance for FHLB, 12
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jun. 18, 2018
Advances from FHLB, Rate	0.93%
Advances from FHLB	$ 10,000	10,000
Fixed rate, fixed term, Advance for FHLB, 13
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jul. 9, 2018
Advances from FHLB, Rate	1.41%
Advances from FHLB	$ 15,000
Fixed rate, fixed term, Advance for FHLB, 14
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jul. 16, 2018
Advances from FHLB, Rate	1.21%
Advances from FHLB	$ 762	762
Fixed rate, fixed term, Advance for FHLB, 15
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jul. 16, 2018
Advances from FHLB, Rate	1.21%
Advances from FHLB	$ 1,038	1,038
Fixed rate, fixed term, Advance for FHLB, 16
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 20, 2018
Advances from FHLB, Rate	1.15%
Advances from FHLB	$ 1,000	1,000
Fixed rate, fixed term, Advance for FHLB, 17
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 20, 2018
Advances from FHLB, Rate	1.15%
Advances from FHLB	$ 800	800
Fixed rate, fixed term, Advance for FHLB, 18
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 20, 2018
Advances from FHLB, Rate	1.27%
Advances from FHLB	$ 2,200	2,200
Fixed rate, fixed term, Advance for FHLB, 19
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Nov. 9, 2018
Advances from FHLB, Rate	1.47%
Advances from FHLB	$ 10,000
Fixed rate, fixed term, Advance for FHLB, 20
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Dec. 31, 2018
Advances from FHLB, Rate	1.65%
Advances from FHLB	$ 3,000	3,000
Fixed rate, fixed term, Advance for FHLB, 21
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Feb. 27, 2019
Advances from FHLB, Rate	1.47%
Advances from FHLB	$ 5,000	5,000
Fixed rate, fixed term, Advance for FHLB, 22
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Mar. 8, 2019
Advances from FHLB, Rate	1.54%
Advances from FHLB	$ 10,000
Fixed rate, fixed term, Advance for FHLB, 23
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jul. 15, 2019
Advances from FHLB, Rate	1.11%
Advances from FHLB	$ 8,000	8,000
Fixed rate, fixed term, Advance for FHLB, 24
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 14, 2019
Advances from FHLB, Rate	1.77%
Advances from FHLB	$ 2,000	2,000
Fixed rate, fixed term, Advance for FHLB, 25
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Feb. 20, 2020
Advances from FHLB, Rate	1.71%
Advances from FHLB	$ 5,000	5,000
Fixed rate, fixed term, Advance for FHLB, 26
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jul. 16, 2020
Advances from FHLB, Rate	1.85%
Advances from FHLB	$ 800	800
Fixed rate, fixed term, Advance for FHLB, 27
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 25, 2020
Advances from FHLB, Rate	1.84%
Advances from FHLB	$ 3,000	3,000
Fixed rate, fixed term, Advance for FHLB, 28
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 27, 2020
Advances from FHLB, Rate	1.88%
Advances from FHLB	$ 5,000	5,000
Fixed rate, fixed term, Advance for FHLB, 29
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Dec. 30, 2020
Advances from FHLB, Rate	2.09%
Advances from FHLB	$ 4,000	4,000
Fixed rate, fixed term, Advance for FHLB, 30
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Dec. 31, 2020
Advances from FHLB, Rate	1.94%
Advances from FHLB	$ 600	600
Fixed rate, fixed term, Advance for FHLB, 31
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Apr. 12, 2021
Advances from FHLB, Rate	1.92%
Advances from FHLB	$ 8,000
Fixed rate, fixed term, Advance for FHLB, 32
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Jun. 15, 2021
Advances from FHLB, Rate	1.39%
Advances from FHLB	$ 5,000	5,000
Fixed rate, fixed term, Advance for FHLB, 33
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Aug. 16, 2021
Advances from FHLB, Rate	2.29%
Advances from FHLB	$ 3,000	3,000
Fixed rate, fixed term, Advance for FHLB, 34
Debt Instrument [Line Items]
Advances from FHLB, Maturity	Dec. 30, 2021
Advances from FHLB, Rate	2.29%
Advances from FHLB	$ 2,000	$ 2,000

Advances from FHLB and Other 59

Advances from FHLB and Other Borrowings - Future Maturities of Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Federal Home Loan Banks [Abstract]
1 year or less	$ 53,900	$ 29,395
1 to 2 years	38,000	35,100
2 to 3 years	13,800	15,000
3 to 4 years	20,600	18,400
Over 4 years	2,000	10,000
Advances from FHLB	$ 128,300	$ 107,895

Advances from FHLB and Other 60

Advances from FHLB and Other Borrowings - Balances and Interest Rates on Other Borrowings (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Other Borrowings:
Balance outstanding at end of period	$ 1,352	$ 2,152
Average amount outstanding during the period	1,618	3,047
Maximum amount outstanding at any month end	$ 1,825	$ 3,930
Weighted average interest rate during the period	5.84%	5.30%
Weighted average interest rate at end of period	6.20%	5.32%

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended		15 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense	$ 393	$ 295
Unrecognized share-based compensation expense related to nonvested options and restricted stock awards amounted	$ 700		$ 700
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option term	10 years
Maximum | Equity Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years
Minimum | Equity Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	1 year
Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock granted under plan	5,988
Restricted Stock Awards | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	5 years
Restricted Stock Awards | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	1 year
Stock Options And Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense	$ 393	$ 295
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to nonvested options and restricted stock award amounted, weighted average period of recognition	2 years 2 months 13 days
2016 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options granted under plan	24,653		30,234
2016 Long Term Incentive Plan | Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock granted under plan			30,234

Equity Incentive Plan - Status

Equity Incentive Plan - Status and Changes in Stock Option Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended		15 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017
Number of Options
Options, Exercised		(65,026)	(45,493)
2016 Long Term Incentive Plan
Number of Options
Options, Outstanding beginning of year		291,059
Options, Granted		24,653		30,234
Options, Exercised		(65,026)
Options, Forfeited/expired		(4,868)
Options, Outstanding end of period		245,818		245,818
Options exercisable at period-end		159,329		159,329
Weighted-Average Exercise Price
Weighted Average Exercise price, Outstanding, beginning of year		$ 15.18
Weighted Average Exercise Price, Granted		26.27
Weighted Average Exercise Price, Exercised		12.68
Weighted Average Exercise Price, Forfeited/expired		21.69
Weighted Average Exercise Price, Outstanding, end of period		16.83		$ 16.83
Weighted Average Exercise Price, Options exercisable at period-end		14.67		$ 14.67
Weighted-average fair value of options granted during the period	[1]	$ 9.54
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Outstanding, end of period	[2]	$ 3,250		$ 3,250
Aggregate Intrinsic Value, Options exercisable at period-end	[2]	$ 2,450		$ 2,450
[1]	The fair value (present value of the estimated future benefit to the option holder) of each option grant is estimated on the date of grant using the Black-Scholes option pricing model.
[2]	The aggregate intrinsic value of a stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on September 30, 2017. This amount changes based on changes in the market value of the Company’s stock.

Equity Incentive Plan - Activit

Equity Incentive Plan - Activity in Restricted Stock Awards and Restricted Stock Units (Detail)	9 Months Ended
	Sep. 30, 2017$ / sharesshares
RSAs
Number of Non-Vested Shares
Outstanding, beginning of year | shares	38,593
Granted | shares	5,988
Vested | shares	(2,416)
Forfeited/expired | shares	(948)
Outstanding, end of period | shares	41,217
Weighted Average Grant Date Fair Value
Weighted Average Grant Price Outstanding, Beginning of year | $ / shares	$ 17.27
Weighted Average Grant Price Outstanding, Granted | $ / shares	27.31
Weighted Average Grant Price, Vested | $ / shares	19.77
Weighted Average Grant Price, Forfeited or expired | $ / shares	27.31
Weighted Average Grant Price Outstanding, End of year | $ / shares	$ 18.35
RSUs
Number of Non-Vested Shares
Granted | shares	8,691
Outstanding, end of period | shares	8,691
Weighted Average Grant Date Fair Value
Weighted Average Grant Price Outstanding, Granted | $ / shares	$ 25.53
Weighted Average Grant Price Outstanding, End of year | $ / shares	$ 25.53

Regulatory Matters - Summary of

Regulatory Matters - Summary of Actual Capital Amounts and Ratios of Company's and Bank's (Detail) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to risk weighted assets), Actual Amount		$ 163,592	$ 154,335
Total Capital (to risk weighted assets), Actual Ratio		13.19%	13.59%
Total Capital (to risk weighted assets), Minimum For Capital Adequacy Purpose, Amount	[1]	$ 114,751	$ 97,949
Total Capital (to risk weighted assets), Minimum For Capital Adequacy Purpose, Ratio	[1]	9.25%	8.625%
Tier 1 Capital (to risk weighted assets), Actual Amount		$ 149,394	$ 141,206
Tier 1 Capital (to risk weighted assets), Actual Ratio		12.04%	12.43%
Tier 1 Capital (to risk weighted assets), Minimum For Capital Adequacy Purposes, Amount	[1]	$ 89,940	$ 75,236
Tier 1 Capital (to risk weighted assets), Minimum For Capital Adequacy Purposes, Ratio	[1]	7.25%	6.625%
Tier 1 Capital (to average assets), Actual Amount		$ 149,394	$ 141,206
Tier 1 Capital (to average assets), Actual Ratio		11.53%	11.48%
Tier 1 Capital (to average assets), Minimum To Be Adequately Capitalized Under Prompt Corrective Action Provisions, Amount	[1]	$ 51,809	$ 49,183
Tier 1 Capital (to average assets), Minimum To Be Adequately Capitalized Under Prompt Corrective Action Provisions, Ratio	[1]	4.00%	4.00%
Tier 1 Common Equity (to risk weighted assets), Actual Amount		$ 125,888	$ 117,755
Tier 1 Common Equity (to risk weighted assets), Actual Ratio		10.15%	10.37%
Tier 1 Common Equity (to risk weighted assets), Minimum For Capital Adequacy Purposes, Amount	[1]	$ 71,332	$ 58,201
Tier 1 Common Equity (to risk weighted assets), Minimum For Capital Adequacy Purposes, Ratio	[1]	5.75%	5.125%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to risk weighted assets), Actual Amount		$ 158,824	$ 149,278
Total Capital (to risk weighted assets), Actual Ratio		12.81%	13.23%
Total Capital (to risk weighted assets), Minimum For Capital Adequacy Purpose, Amount	[1]	$ 114,692	$ 97,295
Total Capital (to risk weighted assets), Minimum For Capital Adequacy Purpose, Ratio	[1]	9.25%	8.625%
Total Capital (to risk weighted assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		$ 123,992	$ 112,805
Total Capital (to risk weighted assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%	10.00%
Tier 1 Capital (to risk weighted assets), Actual Amount		$ 144,626	$ 136,148
Tier 1 Capital (to risk weighted assets), Actual Ratio		11.66%	12.07%
Tier 1 Capital (to risk weighted assets), Minimum For Capital Adequacy Purposes, Amount	[1]	$ 89,894	$ 74,734
Tier 1 Capital (to risk weighted assets), Minimum For Capital Adequacy Purposes, Ratio	[1]	7.25%	6.625%
Tier 1 Capital (to risk weighted assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		$ 99,193	$ 90,244
Tier 1 Capital (to risk weighted assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		8.00%	8.00%
Tier 1 Capital (to average assets), Actual Amount		$ 144,626	$ 136,148
Tier 1 Capital (to average assets), Actual Ratio		11.17%	11.08%
Tier 1 Capital (to average assets), Minimum To Be Adequately Capitalized Under Prompt Corrective Action Provisions, Amount	[1]	$ 51,770	$ 49,144
Tier 1 Capital (to average assets), Minimum To Be Adequately Capitalized Under Prompt Corrective Action Provisions, Ratio	[1]	4.00%	4.00%
Tier 1 Capital (to average assets), Minimum To Be Adequately Capitalized Under Prompt Corrective Action Provisions, Amount		$ 64,713	$ 61,430
Tier 1 Capital (to average assets), Minimum To Be Adequately Capitalized Under Prompt Corrective Action Provisions, Ratio		5.00%	5.00%
Tier 1 Common Equity (to risk weighted assets), Actual Amount		$ 144,626	$ 136,148
Tier 1 Common Equity (to risk weighted assets), Actual Ratio		11.66%	12.07%
Tier 1 Common Equity (to risk weighted assets), Minimum For Capital Adequacy Purposes, Amount	[1]	$ 71,295	$ 57,813
Tier 1 Common Equity (to risk weighted assets), Minimum For Capital Adequacy Purposes, Ratio	[1]	5.75%	5.125%
Tier 1 Common Equity (to risk weighted assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount		$ 80,595	$ 73,323
Tier 1 Common Equity (to risk weighted assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		6.50%	6.50%
[1]	The ratios for September 30, 2017 and December 31, 2016 include a capital conservation buffer of 1.25% and 0.625%, respectively.

Fair Value Measurements - Asset

Fair Value Measurements - Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 107,242	$ 123,437
Fair Value on a Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	107,242	123,437
Fair Value on a Recurring Basis | U.S. Government and Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value		1,000
Fair Value on a Recurring Basis | Municipal securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	37,879	45,456
Fair Value on a Recurring Basis | Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	69,363	73,308
Fair Value on a Recurring Basis | Asset-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value		3,673
Fair Value on a Recurring Basis | Level 2 Inputs
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	107,242	123,437
Fair Value on a Recurring Basis | Level 2 Inputs | U.S. Government and Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value		1,000
Fair Value on a Recurring Basis | Level 2 Inputs | Municipal securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	37,879	45,456
Fair Value on a Recurring Basis | Level 2 Inputs | Mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 69,363	73,308
Fair Value on a Recurring Basis | Level 2 Inputs | Asset-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value		$ 3,673

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Carried on Consolidated Balance Sheet for Which Nonrecurring Change in Fair Value Has Been Recorded (Detail) - Fair Value on a Nonrecurring Basis - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment Losses	$ 1,212	$ 1,816
Impaired Loans
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment Losses	1,127	1,336
Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment Losses	85	480
Level 3 Inputs
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets at fair value	39,936	23,265
Level 3 Inputs | Impaired Loans
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets at fair value	32,962	20,104
Level 3 Inputs | Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets at fair value	$ 6,974	$ 3,161

Fair Value Measurements - Signi

Fair Value Measurements - Significant Inputs Used in Fair Value Measurements for Level 3 Assets Measured on Nonrecurring Basis (Detail) - Level 3 Inputs	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Impaired Loans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Valuation Techniques	Evaluation of collateral	Evaluation of collateral
Unobservable Inputs	Estimation of value	Estimation of value
Other Real Estate Owned
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Valuation Techniques	Appraisal	Appraisal
Unobservable Inputs	Appraisal adjustment	Appraisal adjustment
Other Real Estate Owned | Minimum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range (Average)	10.00%	7.00%
Other Real Estate Owned | Maximum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range (Average)	41.00%	39.00%
Other Real Estate Owned | Weighted Average
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range (Average)	22.00%	21.00%

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Values and Related Carrying or Notional Amounts of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets:
Securities available for sale	$ 107,242	$ 123,437
Level 3 Inputs
Financial assets:
Loan servicing rights	12,400	12,200
Carrying Amount
Financial assets:
Cash and cash equivalents	71,795	42,679
Securities available for sale	107,242	123,437
FHLB Stock	4,309	5,688
Loans, net of allowance for loan losses	1,112,976	1,017,841
Loans held for sale	2,054	1,162
Accrued interest receivable	3,847	3,151
Loan servicing rights	8,986	9,264
Financial liabilities:
Other borrowings	1,352	2,152
Advances from FHLB	128,300	107,895
Subordinated debentures	15,506	15,451
Accrued interest payable	2,125	1,879
Fair Value
Financial assets:
Cash and cash equivalents	71,795	42,679
Securities available for sale	107,242	123,437
FHLB Stock	4,309	5,688
Loans, net of allowance for loan losses	1,117,970	1,022,391
Loans held for sale	2,054	1,162
Accrued interest receivable	3,847	3,151
Loan servicing rights	12,423	12,194
Financial liabilities:
Other borrowings	1,352	2,152
Advances from FHLB	129,184	108,517
Subordinated debentures	15,506	15,451
Accrued interest payable	2,125	1,879
Fair Value | Level 1 Inputs
Financial assets:
Cash and cash equivalents	71,795	42,679
Fair Value | Level 2 Inputs
Financial assets:
Securities available for sale	107,242	123,437
FHLB Stock	4,309	5,688
Accrued interest receivable	3,847	3,151
Financial liabilities:
Accrued interest payable	2,125	1,879
Fair Value | Level 3 Inputs
Financial assets:
Loans, net of allowance for loan losses	1,117,970	1,022,391
Loans held for sale	2,054	1,162
Loan servicing rights	12,423	12,194
Financial liabilities:
Other borrowings	1,352	2,152
Advances from FHLB	129,184	108,517
Subordinated debentures	15,506	15,451
Bank Time Deposits | Carrying Amount
Financial liabilities:
Deposits	714,080	596,565
Bank Time Deposits | Fair Value
Financial liabilities:
Deposits	720,041	600,153
Bank Time Deposits | Fair Value | Level 3 Inputs
Financial liabilities:
Deposits	720,041	600,153
Other Deposits | Carrying Amount
Financial liabilities:
Deposits	352,014	380,953
Other Deposits | Fair Value
Financial liabilities:
Deposits	349,037	377,980
Other Deposits | Fair Value | Level 1 Inputs
Financial liabilities:
Deposits	$ 349,037	$ 377,980

Other Real Estate Owned - Summa

Other Real Estate Owned - Summary of Changes in Other Real Estate Owned (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Real Estate Owned Disclosure Of Detailed Components [Abstract]
Balance, beginning of period	$ 6,917	$ 2,789	$ 3,161	$ 2,872
Assets foreclosed	268		4,779	159
Assets acquired				1,951
Assets transferred from premises and equipment		397		397
Write-down of other real estate owned	(7)	(250)	(85)	(334)
Net gain on sales of other real estate owned	(39)	32	363	121
Proceeds from sale of other real estate owned	(165)	(272)	(1,244)	(2,470)
Balance, end of period	$ 6,974	$ 2,696	$ 6,974	$ 2,696

Other Real Estate Owned - Expen

Other Real Estate Owned - Expenses (Income) Applicable to Other Real Estate Owned Included in Non-Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Real Estate Owned Disclosure Of Detailed Components [Abstract]
Net gain on sales of other real estate owned	$ 39	$ (32)	$ (363)	$ (121)
Write-down of other real estate owned	7	250	85	334
Operating expenses, net of rental income	30	41	99	120
Total Expenses	$ 76	$ 259	$ (179)	$ 333