Equity Bancshares (EQBK) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 03, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	EQBK
Entity Registrant Name	EQUITY BANCSHARES INC
Entity Central Index Key	1,227,500
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		15,787,545
Class B Non-Voting Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 46,704	$ 48,034
Federal funds sold	987	4,161
Cash and cash equivalents	47,691	52,195
Interest-bearing time deposits in other banks	6,991	3,496
Available-for-sale securities	180,238	162,272
Held-to-maturity securities, fair value of $653,012 and $532,744	665,995	535,462
Loans held for sale	43,875	16,344
Loans, net of allowance for loan losses of $10,083 and $8,498	2,401,388	2,094,781
Other real estate owned, net	7,623	7,907
Premises and equipment, net	73,312	63,449
Bank-owned life insurance	72,067	68,384
Federal Reserve Bank and Federal Home Loan Bank stock	35,681	24,373
Interest receivable	14,343	12,371
Goodwill	125,485	104,907
Core deposit intangibles, net	19,800	10,738
Other	17,696	13,830
Total assets	3,712,185	3,170,509
Deposits
Demand	442,279	366,530
Total non-interest-bearing deposits	442,279	366,530
Savings, NOW, and money market	1,387,623	1,238,984
Time	805,146	776,499
Total interest-bearing deposits	2,192,769	2,015,483
Total deposits	2,635,048	2,382,013
Federal funds purchased and retail repurchase agreements	41,394	37,492
Federal Home Loan Bank advances	557,619	347,692
Bank stock loan	18,375	2,500
Subordinated debentures	14,113	13,968
Contractual obligations	1,734	1,967
Interest payable and other liabilities	10,620	10,733
Total liabilities	3,278,903	2,796,365
Commitments and contingent liabilities
Stockholders' equity
Common stock	173	161
Additional paid-in capital	377,800	331,339
Retained earnings	81,079	65,512
Accumulated other comprehensive loss	(5,994)	(3,092)
Employee stock loans	(121)	(121)
Treasury stock	(19,655)	(19,655)
Total stockholders’ equity	433,282	374,144
Total liabilities and stockholders’ equity	$ 3,712,185	$ 3,170,509

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Held-to-maturity securities, fair value	$ 653,012		$ 532,744
Loans, allowance for loan losses	$ 10,083	$ 9,316	$ 8,498	$ 7,568	$ 7,048	$ 6,432

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest and dividend income
Loans, including fees	$ 33,101	$ 20,662	$ 62,149	$ 40,062
Securities, taxable	4,112	3,224	7,835	5,948
Securities, nontaxable	1,025	862	1,904	1,647
Federal funds sold and other	593	334	1,066	640
Total interest and dividend income	38,831	25,082	72,954	48,297
Interest expense
Deposits	5,338	2,894	10,056	5,470
Federal funds purchased and retail repurchase agreements	24	13	47	25
Federal Home Loan Bank advances	2,094	734	3,393	1,236
Bank stock loan	156		183
Subordinated debentures	299	242	568	474
Total interest expense	7,911	3,883	14,247	7,205
Net interest income	30,920	21,199	58,707	41,092
Provision for loan losses	750	628	1,920	1,723
Net interest income after provision for loan losses	30,170	20,571	56,787	39,369
Non-interest income
Service charges and fees	1,729	1,267	3,309	2,449
Debit card income	1,522	1,205	2,775	2,210
Mortgage banking	312	540	625	1,025
Increase in value of bank-owned life insurance	508	354	1,160	709
Net gain (loss) from securities transactions	(2)	83	(10)	96
Other	523	513	984	812
Total non-interest income	4,592	3,962	8,843	7,301
Non-interest expense
Salaries and employee benefits	11,629	8,236	22,520	16,042
Net occupancy and equipment	2,011	1,519	3,813	3,018
Data processing	1,968	1,191	3,642	2,352
Professional fees	844	462	1,559	978
Advertising and business development	665	624	1,284	1,142
Telecommunications	432	330	801	691
FDIC insurance	510	219	754	325
Courier and postage	303	236	558	462
Free nationwide ATM cost	330	233	622	445
Amortization of core deposit intangibles	625	235	1,009	444
Loan expense	145	282	491	459
Other real estate owned	(671)	70	(403)	275
Merger expenses	5,236	136	5,767	1,062
Other	1,948	1,358	3,185	2,662
Total non-interest expense	25,975	15,131	45,602	30,357
Income before income taxes	8,787	9,402	20,028	16,313
Provision for income taxes	1,920	3,048	4,450	5,095
Net income and net income allocable to common stockholders	$ 6,867	$ 6,354	$ 15,578	$ 11,218
Basic earnings per share	$ 0.45	$ 0.52	$ 1.04	$ 0.93
Diluted earnings per share	$ 0.44	$ 0.51	$ 1.02	$ 0.91

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,867	$ 6,354	$ 15,578	$ 11,218
Other comprehensive income:
Unrealized holding gains (losses) arising during the period on available-for-sale securities	(1,199)	321	(4,136)	533
Amortization of unrealized losses on held-to-maturity securities	115	127	234	264
Reclassification adjustment for net gains included in net income		(83)		(96)
Total other comprehensive income (loss)	(1,084)	365	(3,902)	701
Tax effect	275	(139)	989	(268)
Other comprehensive income (loss), net of tax	(809)	226	(2,913)	433
Comprehensive income	$ 6,058	$ 6,580	$ 12,665	$ 11,651

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Kansas Bank Corporation [Member]	Adams Dairy Bancshares, Inc. [Member]	Prairie State Bancshares, Inc. [Member]	Common Stock [Member]	Common Stock [Member]Kansas Bank Corporation [Member]	Common Stock [Member]Adams Dairy Bancshares, Inc. [Member]	Common Stock [Member]Prairie State Bancshares, Inc. [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member]Kansas Bank Corporation [Member]	Additional Paid-In Capital [Member]Adams Dairy Bancshares, Inc. [Member]	Additional Paid-In Capital [Member]Prairie State Bancshares, Inc. [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Employee Stock Loans [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2016	$ 257,964				$ 132				$ 236,103				$ 44,328	$ (2,702)	$ (242)	$ (19,655)
Beginning balance, shares at Dec. 31, 2016					11,680,308
Net income	11,218												11,218
Other comprehensive income, net of tax effects	433													433
Stock based compensation	732								732
Stock based compensation, shares					3,712
Common stock issued upon exercise of stock options	726								726
Common stock issued upon exercise of stock options, shares					42,834
Repayments on employee stock loans	72														72
Issuance of common stock in connection with the acquisition and net of issuance expenses				$ 14,913				$ 5				$ 14,908
Issuance of common stock in connection with the acquisition and net of issuance expenses, shares								479,465
Ending balance at Jun. 30, 2017	286,058				$ 137				252,469				55,546	(2,269)	(170)	(19,655)
Ending balance, shares at Jun. 30, 2017					12,206,319
Beginning balance at Dec. 31, 2017	374,144				$ 161				331,339				65,512	(3,092)	(121)	(19,655)
Beginning balance, shares at Dec. 31, 2017					14,605,607
Net income	15,578												15,578
Other comprehensive income, net of tax effects	(2,913)													(2,913)
Stock based compensation	1,339								1,339
Stock based compensation, shares					9,008
Common stock issued upon exercise of stock options	18								18
Common stock issued upon exercise of stock options, shares					1,250
Issuance of common stock in connection with the acquisition and net of issuance expenses		$ 31,896	$ 13,220			$ 8	$ 4			$ 31,888	$ 13,216
Issuance of common stock in connection with the acquisition and net of issuance expenses, shares						820,849	344,063
Ending balance at Jun. 30, 2018	$ 433,282				$ 173				$ 377,800				81,079	(5,994)	$ (121)	$ (19,655)
Ending balance, shares at Jun. 30, 2018					15,780,777
Adoption of ASU 2016-01 reclassifying AFS equity securities with readily determined fair value													$ (11)	$ 11

Consolidated Statements of Sto7

Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Prairie State Bancshares, Inc. [Member]
Issuance expense on issuance of common stock		$ 329
Kansas Bank Corporation [Member]
Issuance expense on issuance of common stock	$ 207
Adams Dairy Bancshares, Inc. [Member]
Issuance expense on issuance of common stock	$ 236

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 15,578	$ 11,218
Adjustments to reconcile net income to net cash from operating activities:
Stock based compensation	1,339	732
Depreciation	1,451	1,197
Provision for loan losses	1,920	1,723
Net (accretion) amortization of purchase accounting adjustments	(2,559)	(2,749)
Amortization of premiums and discounts on securities	1,551	1,225
Amortization of intangibles	1,033	447
Deferred income taxes	(101)	(53)
FHLB stock dividends	(575)	(380)
Loss (gain) on sales and valuation adjustments on other real estate owned	(725)	(14)
Net loss (gain) on securities transactions	(2)	(96)
Change in unrealized loss (gain) on equity securities	12
Loss (gain) on disposal of premise and equipment	(192)	(10)
Loss (gain) on sale of foreclosed assets	1
Loss (gain) on sales of loans	(504)	(856)
Originations of loans held for sale	(134,283)	(35,180)
Proceeds from the sale of loans held for sale	107,257	37,402
Increase in the value of bank-owned life insurance	(1,160)	(710)
Change in fair value of derivatives recognized in earnings	(7)	(1)
Net change in:
Interest receivable	167	257
Other assets	(332)	(716)
Interest payable and other liabilities	(552)	604
Net cash provided by (used in) operating activities	(10,683)	14,040
Cash flows to investing activities
Purchases of available-for-sale securities	(36,007)	(13,660)
Purchases of held-to-maturity securities	(71,325)	(89,853)
Proceeds from sales, calls, pay-downs, and maturities of available-for-sale securities	46,516	17,452
Proceeds from calls, pay-downs and maturities of held-to-maturity securities	32,240	26,877
Net change in interest-bearing time deposits in other banks	743	248
Net change in loans	(65,142)	(17,212)
Purchase of premises and equipment	(2,002)	(2,955)
Proceeds from sale of premise and equipment	1,200	13
Proceeds from sale of foreclosed assets	99
Net redemption (purchase) of FHLB and FRB stock	(10,066)	(2,565)
Proceeds from sale of other real estate owned	2,305	932
Proceeds from bank-owned life insurance death benefits	346
Net cash provided by (used in) investing activities	(89,759)	(87,467)
Cash flows (to) from financing activities
Net increase (decrease) in deposits	(132,549)	63,786
Net change in federal funds purchased and retail repurchase agreements	3,902	432
Net borrowings (payments) on Federal Home Loan Bank line of credit	208,926	(2,180)
Proceeds from bank stock loan	16,000
Principal payments on bank stock loan	(125)
Principal payments on employee stock loans		73
Proceeds from the exercise of employee stock options	18	726
Net change in contractual obligations	(234)	(293)
Net cash provided by (used in) financing activities	95,938	62,544
Net change in cash and cash equivalents	(4,504)	(10,883)
Cash and cash equivalents, beginning of period	52,195	35,095
Ending cash and cash equivalents	47,691	24,212
Supplemental cash flow information:
Interest paid	13,309	6,441
Income taxes paid, net of refunds	2,230	2,922
Supplemental noncash disclosures:
Other real estate owned acquired in settlement of loans	1,296	3,976
Securities purchased but not settled		1,161
Prairie State Bancshares, Inc. [Member]
Cash flows to investing activities
Cash paid for acquisition		(6,744)
Supplemental noncash disclosures:
Total fair value of assets acquired, net of cash		146,509
Total fair value of liabilities acquired		$ 125,591
Eastman National Bancshares, Inc. [Member]
Cash flows to investing activities
Cash paid for acquisition	(55)
Kansas Bank Corporation [Member]
Cash flows to investing activities
Cash paid for acquisition	12,774
Supplemental noncash disclosures:
Total fair value of assets acquired, net of cash	294,618
Total fair value of liabilities acquired	289,103
Adams Dairy Bancshares, Inc. [Member]
Cash flows to investing activities
Cash paid for acquisition	(1,385)
Supplemental noncash disclosures:
Total fair value of assets acquired, net of cash	108,545
Total fair value of liabilities acquired	$ 102,406

BASIS OF PRESENTATION

BASIS OF PRESENTATION	6 Months Ended
	Jun. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
BASIS OF PRESENTATION	NOTE 1 – BASIS OF PRESENTATION The interim consolidated financial statements include the accounts of Equity Bancshares, Inc., its wholly owned subsidiary, Equity Bank, and Equity Bank’s wholly owned subsidiary, SA Holdings, Inc. These entities are collectively referred to as the “Company”. All significant intercompany accounts and transactions have been eliminated in consolidation. The accompanying unaudited condensed interim consolidated financial statements have been prepared in accordance with United States Generally Accepted Accounting Principles (“GAAP”) for interim financial information and in accordance with guidance provided by the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial information. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. In the opinion of management, the interim statements reflect all adjustments necessary for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis and all such adjustments are of a normal recurring nature. These financial statements and the accompanying notes should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2017 included in the Company’s Annual Report on Form 10-K filed with the SEC on March 16, 2018. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 or any other period. Change in Tax Law: On December 22, 2017, the President of the United States signed the 2017 Tax Cuts and Jobs Act (“Tax Reform”), which reduced the U.S. federal statutory corporate income tax rate from 35% to 21% beginning in 2018. On the same date, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118, which specifies that reasonable estimates of the income tax effects of Tax Reform should be used to account for the effects of Tax Reform in the period enactment is required by general accepted accounting principals and also provided for a measurement period that should not extend beyond one year from Tax Reform’s enactment date. The Company has accounted for the effects of Tax Reform using reasonable estimates based on currently available information. This accounting may change due to changes in interpretations the Company has made and the issuance of new tax or accounting guidance. Adoption of New Accounting Standards: On January 1, 2018, the Company adopted ASU 2014-09 Revenue from Contracts with Customers The Company adopted ASC 606 using the modified retrospective method applied to all contracts not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018, are presented under ASC 606, while prior period amounts continue to be reported in accordance with legacy GAAP. The adoption of ASC 606 did not result in a change to the accounting for any of the in-scope revenue streams; as such, no cumulative effect adjustment was recorded. Except for gains or losses from the sale of OREO, all of the Company’s revenue from contracts with customers within the scope of ASC 606 is recognized in non-interest income. The following table presents the Company’s sources of non-interest income for the three and six months ended June 30, 2018, and 2017. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Non-interest income Service charges and fees $ 1,729 $ 1,224 $ 3,309 $ 2,449 Debit card income 1,522 1,205 2,775 2,210 Mortgage banking (a) 312 540 625 1,025 Increase in bank-owned life insurance (a) 508 354 1,160 709 Net gain (loss) from securities transactions (a) (2 ) 83 (10 ) 96 Other (b) 523 556 984 812 Total $ 4,592 $ 3,962 $ 8,843 $ 7,301 (a) (b) A description of the Company’s revenue streams accounted for under ASC 606 follows: Service Charges and Fees: Debit Card Income: Investment Referral Income: Insurance Sales Commissions: Other Non-interest Income: Gain or Loss on Sale of Other Real Estate: On January 1, 2018, the Company adopted ASU 2016-01 Recognition and Measurement of Financial Assets and Financial Liabilities Also on January 1, 2018, the Company adopted ASU 2016-15, Statement of Cash Flows (Topic 230) Recent Accounting Pronouncements: In February 2016, FASB issued ASU 2016-02, Leases, Leases – Targeted Improvements In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses, In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other In March 2017, the FASB issued ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities In August 2017, FASB issued ASU 2017-12, Derivatives and Hedging, Targeted Improvements to Accounting for Hedging Activities In February 2018, FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

SECURITIES

SECURITIES	6 Months Ended
	Jun. 30, 2018
Investments Debt And Equity Securities [Abstract]
SECURITIES	NOTE 2 – SECURITIES The amortized cost and fair value of available-for-sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income are listed below. Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value June 30, 2018 Available-for-sale securities Residential mortgage-backed securities (issued by government-sponsored entities) $ 186,157 $ — $ (5,919 ) $ 180,238 $ 186,157 $ — $ (5,919 ) $ 180,238 December 31, 2017 Available-for-sale securities Residential mortgage-backed securities (issued by government-sponsored entities) $ 163,374 $ 36 $ (1,819 ) $ 161,591 State and political subdivisions 195 — — 195 Equity securities 500 — (14 ) 486 $ 164,069 $ 36 $ (1,833 ) $ 162,272 The amortized cost and fair value of held-to-maturity securities and the related gross unrecognized gains and losses are listed in the following table. Amortized Cost Gross Unrecognized Gains Gross Unrecognized Losses Fair Value June 30, 2018 Held-to-maturity securities U.S. Government-sponsored entities $ 5,358 $ — $ (24 ) $ 5,334 Residential mortgage-backed (securities issued by government sponsored entities) 481,294 255 (12,521 ) 469,028 Corporate 22,993 372 (35 ) 23,330 Small Business Administration loan pools 1,884 — (34 ) 1,850 State and political subdivisions 154,466 736 (1,732 ) 153,470 $ 665,995 $ 1,363 $ (14,346 ) $ 653,012 December 31, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ 998 $ — $ (13 ) $ 985 Residential mortgage-backed (securities issued by government sponsored entities) 383,875 573 (4,866 ) 379,582 Corporate 22,991 355 — 23,346 Small Business Administration loan pools 2,048 — (14 ) 2,034 State and political subdivisions 125,550 1,694 (447 ) 126,797 $ 535,462 $ 2,622 $ (5,340 ) $ 532,744 The tables above present unrecognized losses on held-to-maturity securities since date of designation. The fair value and amortized cost of debt securities at June 30, 2018, by contractual maturity, is shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value Within one year $ — $ — $ 5,055 $ 5,057 One to five years — — 35,190 35,342 Five to ten years — — 56,830 57,288 After ten years — — 87,626 86,297 Mortgage-backed securities 186,157 180,238 481,294 469,028 Total debt securities $ 186,157 $ 180,238 $ 665,995 $ 653,012 The carrying value of securities pledged as collateral, to secure public deposits and for other purposes, was approximately $658,527 at June 30, 2018 and $570,146 at December 31, 2017. The following tables show gross unrealized losses and fair value, aggregated by investment category, and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2018 and December 31, 2017. Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2018 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 127,047 $ (3,265 ) $ 52,954 $ (2,654 ) $ 180,001 $ (5,919 ) Total temporarily impaired securities $ 127,047 $ (3,265 ) $ 52,954 $ (2,654 ) $ 180,001 $ (5,919 ) December 31, 2017 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 78,884 $ (437 ) $ 58,540 $ (1,382 ) $ 137,424 $ (1,819 ) Equity securities — — 486 (14 ) 486 (14 ) Total temporarily impaired securities $ 78,884 $ (437 ) $ 59,026 $ (1,396 ) $ 137,910 $ (1,833 ) Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2018 Held-to-maturity securities U.S. Government-sponsored entities $ 2,374 $ (1 ) $ 975 $ (23 ) $ 3,349 $ (24 ) Residential mortgage-backed (issued by government-sponsored entities) 185,445 (4,663 ) 181,293 (9,301 ) 366,738 (13,964 ) Corporate 5,166 (114 ) — — 5,166 (114 ) Small Business Administration loan pools 846 (16 ) 1,004 (40 ) 1,850 (56 ) State and political subdivisions 64,467 (944 ) 26,545 (1,135 ) 91,012 (2,079 ) Total temporarily impaired securities $ 258,298 $ (5,738 ) $ 209,817 $ (10,499 ) $ 468,115 $ (16,237 ) December 31, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ — $ — $ 985 $ (13 ) $ 985 $ (13 ) Residential mortgage-backed (issued by government-sponsored entities) 147,281 (1,263 ) 198,239 (5,030 ) 345,520 (6,293 ) Corporate 5,312 (16 ) — — 5,312 (16 ) Small Business Administration loan pools 926 (1 ) 1,108 (38 ) 2,034 (39 ) State and political subdivisions 22,100 (123 ) 26,387 (439 ) 48,487 (562 ) Total temporarily impaired securities $ 175,619 $ (1,403 ) $ 226,719 $ (5,520 ) $ 402,338 $ (6,923 ) The tables above present unrealized losses on held-to-maturity securities since the date of purchase, independent of the impact associated with changes in cost basis upon transfer from the available-for-sale designation to the held-to-maturity designation. As of June 30, 2018, the Company held 38 available-for-sale securities and 446 held-to-maturity securities in an unrealized loss position. Unrealized losses on securities have not been recognized into income because the security issuers are of high credit quality, management does not intend to sell and it is more likely than not that the Company will not be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely due to changes in interest rates. The fair value is expected to recover as the securities approach maturity. The proceeds from sales and the associated gains and losses on available-for-sale securities reclassified from other comprehensive income to income are listed in the table below. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Proceeds $ — $ 3,083 $ — $ 6,522 Gross gains — 83 — 96 Gross losses — — — — Income tax expense on net realized gains — 32 — 37

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans and Allowance for Loan Losses	NOTE 3 – LOANS AND ALLOWANCE FOR LOAN LOSSES The following table lists categories of loans at June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Commercial real estate $ 1,226,397 $ 987,661 Commercial and industrial 503,716 507,519 Residential real estate 409,571 376,705 Agricultural real estate 118,241 86,486 Consumer 54,464 49,361 Agricultural 99,082 95,547 Total loans 2,411,471 2,103,279 Allowance for loan losses (10,083 ) (8,498 ) Net loans $ 2,401,388 $ 2,094,781 The Company has participated in mortgage finance loans with another institution, (the “originator”). These mortgage finance loans consist of ownership interests purchased in single family residential mortgages funded through the originator’s mortgage finance group. These loans are typically on the Company’s balance sheet for 10 to 20 days. As of June 30, 2018 and December 31, 2017, the Company had balances of $10,000 and $10,000 in mortgage finance loans classified as commercial and industrial. From time to time the Company has purchased pools of residential real estate loans originated by other financial institutions to hold for investment with the intent to diversify the residential real estate portfolio. As of June 30, 2018 and December 31, 2017, residential real estate loans include $74,944 and $85,868 of purchased residential real estate loans. The unamortized balance of merger purchase accounting adjustments related to non-purchase credit impaired loans included in the loan totals above are $11,070 with related loans of $895,686 at June 30, 2018, and $6,842 with related loans of $796,064 at December 31, 2017. Over-draft deposit accounts are reclassified and included in consumer loans above. These accounts totaled $1,367 at June 30, 2018 and $741 at December 31, 2017. The following tables present the activity in the allowance for loan losses by class for the three-month periods ended June 30, 2018 and 2017. June 30, 2018 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 3,010 $ 2,388 $ 2,442 $ 267 $ 878 $ 331 $ 9,316 Provision for loan losses 216 (64 ) 185 147 247 19 750 Loans charged-off — (77 ) (148 ) (80 ) (203 ) (4 ) (512 ) Recoveries 269 7 184 — 61 8 529 Total ending allowance balance $ 3,495 $ 2,254 $ 2,663 $ 334 $ 983 $ 354 $ 10,083 June 30, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,592 $ 2,059 $ 1,875 $ 66 $ 391 $ 65 $ 7,048 Provision for loan losses (245 ) 397 58 46 298 74 628 Loans charged-off (29 ) (409 ) (27 ) (3 ) (242 ) — (710 ) Recoveries 406 23 93 — 75 5 602 Total ending allowance balance $ 2,724 $ 2,070 $ 1,999 $ 109 $ 522 $ 144 $ 7,568 The following tables present the activity in the allowance for loan losses by class for the six-month periods ended June 30, 2018 and 2017. June 30, 2018 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,740 $ 2,136 $ 2,262 $ 319 $ 768 $ 273 $ 8,498 Provision for loan losses 507 196 475 92 535 115 1,920 Loans charged-off (29 ) (86 ) (271 ) (80 ) (509 ) (43 ) (1,018 ) Recoveries 277 8 197 3 189 9 683 Total ending allowance balance $ 3,495 $ 2,254 $ 2,663 $ 334 $ 983 $ 354 $ 10,083 June 30, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,420 $ 1,881 $ 1,765 $ 35 $ 266 $ 65 $ 6,432 Provision for loan losses (78 ) 585 374 77 650 115 1,723 Loans charged-off (92 ) (422 ) (238 ) (3 ) (601 ) (41 ) (1,397 ) Recoveries 474 26 98 — 207 5 810 Total ending allowance balance $ 2,724 $ 2,070 $ 1,999 $ 109 $ 522 $ 144 $ 7,568 The following tables present the recorded investment in loans and the balance in the allowance for loan losses by portfolio and class based on impairment method as of June 30, 2018 and December 31, 2017. June 30, 2018 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 28 $ 27 $ 411 $ 25 $ 49 $ 12 $ 552 Collectively evaluated for impairment 3,460 2,212 2,235 306 934 336 9,483 Purchase credit impaired loans 7 15 17 3 — 6 48 Total $ 3,495 $ 2,254 $ 2,663 $ 334 $ 983 $ 354 $ 10,083 Loan Balance: Individually evaluated for impairment $ 2,029 $ 5,242 $ 4,851 $ 2,496 $ 523 $ 280 $ 15,421 Collectively evaluated for impairment 1,209,070 491,874 402,324 110,974 53,936 96,436 2,364,614 Purchase credit impaired loans 15,298 6,600 2,396 4,771 5 2,366 31,436 Total $ 1,226,397 $ 503,716 $ 409,571 $ 118,241 $ 54,464 $ 99,082 $ 2,411,471 December 31, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 130 $ 87 $ 386 $ 46 $ 56 $ 36 $ 741 Collectively evaluated for impairment 2,582 2,028 1,815 190 712 236 7,563 Purchase credit impaired loans 28 21 61 83 — 1 194 Total $ 2,740 $ 2,136 $ 2,262 $ 319 $ 768 $ 273 $ 8,498 Loan Balance: Individually evaluated for impairment $ 2,728 $ 7,886 $ 4,829 $ 533 $ 556 $ 1,050 $ 17,582 Collectively evaluated for impairment 971,376 493,903 369,471 82,493 48,802 90,795 2,056,840 Purchase credit impaired loans 13,557 5,730 2,405 3,460 3 3,702 28,857 Total $ 987,661 $ 507,519 $ 376,705 $ 86,486 $ 49,361 $ 95,547 $ 2,103,279 The following table presents information related to impaired loans, excluding purchased credit impaired loans which have not deteriorated since acquisition, by class of loans as of June 30, 2018 and December 31, 2017. The recorded investment in loans excludes accrued interest receivable due to immateriality. June 30, 2018 December 31, 2017 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated With no related allowance recorded: Commercial real estate $ 1,690 $ 1,629 $ — $ 1,878 $ 1,567 $ — Commercial and industrial 6,271 4,970 — 8,679 8,020 — Residential real estate 747 742 — 1,230 969 — Agricultural real estate 2,273 2,242 — 52 52 — Consumer 41 38 — 1 — — Agricultural 162 158 — 7 7 — Subtotal 11,184 9,779 — 11,847 10,615 — With an allowance recorded: Commercial real estate 628 466 35 4,049 1,597 158 Commercial and industrial 511 423 42 1,310 1,113 108 Residential real estate 4,492 4,276 428 4,868 4,468 447 Agricultural real estate 300 283 28 1,266 1,034 129 Consumer 592 486 49 677 559 56 Agricultural 210 182 18 1,798 1,444 37 Subtotal 6,733 6,116 600 13,968 10,215 935 Total $ 17,917 $ 15,895 $ 600 $ 25,815 $ 20,830 $ 935 The tables below present average recorded investment and interest income related to impaired loans for the three months and six months ended June 30, 2018 and 2017. Interest income recognized in the following table was substantially recognized on the cash basis. The recorded investment in loans excludes accrued interest receivable due to immateriality. As of and for the three months ended June 30, 2018 June 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 1,773 $ 118 $ 1,099 $ — Commercial and industrial 6,186 56 1,034 — Residential real estate 565 9 330 1 Agricultural real estate 1,189 11 31 12 Consumer 19 — — — Agricultural 307 18 7 — Subtotal 10,039 212 2,501 13 With an allowance recorded: Commercial real estate 665 1 2,229 7 Commercial and industrial 514 — 558 — Residential real estate 3,774 22 3,563 13 Agricultural real estate 313 2 339 — Consumer 473 3 383 2 Agricultural 218 4 150 — Subtotal 5,957 32 7,222 22 Total $ 15,996 $ 244 $ 9,723 $ 35 As of and for the six months ended June 30, 2018 June 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 1,704 $ 118 $ 841 $ 7 Commercial and industrial 6,797 66 667 3 Residential real estate 700 10 688 1 Agricultural real estate 810 12 437 12 Consumer 13 — 26 — Agricultural 207 18 6 — Subtotal 10,231 224 2,665 23 With an allowance recorded: Commercial real estate 975 2 2,195 9 Commercial and industrial 714 — 378 1 Residential real estate 4,005 22 3,207 15 Agricultural real estate 553 2 211 — Consumer 502 3 368 2 Agricultural 627 4 141 — Subtotal 7,376 33 6,500 27 Total $ 17,607 $ 257 $ 9,165 $ 50 The following tables present the aging of the recorded investment in past due loans as of June 30, 2018 and December 31, 2017, by portfolio and class of loans. June 30, 2018 30 - 59 Days Past Due 60 - 89 Days Past Due Greater Than 90 Days Past Due Still On Accrual Nonaccrual Loans Not Past Due Total Commercial real estate $ 1,762 $ 301 $ — $ 12,603 $ 1,211,731 $ 1,226,397 Commercial and industrial 208 754 302 11,114 491,338 503,716 Residential real estate 710 627 — 5,371 402,863 409,571 Agricultural real estate — — — 5,690 112,551 118,241 Consumer 336 62 — 524 53,542 54,464 Agricultural 52 99 — 2,646 96,285 99,082 Total $ 3,068 $ 1,843 $ 302 $ 37,948 $ 2,368,310 $ 2,411,471 December 31, 2017 30 - 59 Days Past Due 60 - 89 Days Past Due Greater Than 90 Days Past Due Still On Accrual Nonaccrual Loans Not Past Due Total Commercial real estate $ 1,284 $ 22 $ — $ 11,607 $ 974,748 $ 987,661 Commercial and industrial 251 6 — 13,217 494,045 507,519 Residential real estate 1,457 1,176 — 6,148 367,924 376,705 Agricultural real estate 123 — — 3,993 82,370 86,486 Consumer 359 112 — 559 48,331 49,361 Agricultural 415 — — 4,752 90,380 95,547 Total $ 3,889 $ 1,316 $ — $ 40,276 $ 2,057,798 $ 2,103,279 Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. Consumer loans are considered pass credits unless downgraded due to payment status or reviewed as part of a larger credit relationship. The Company uses the following definitions for risk ratings: Pass Special Mention Substandard Doubtful The risk category of loans by class of loans is as follows as of June 30, 2018 and December 31, 2017. June 30, 2018 Unclassified Classified Total Commercial real estate $ 1,211,285 $ 15,112 $ 1,226,397 Commercial and industrial 486,469 17,247 503,716 Residential real estate 403,988 5,583 409,571 Agricultural real estate 108,349 9,892 118,241 Consumer 53,931 533 54,464 Agricultural 92,555 6,527 99,082 Total $ 2,356,577 $ 54,894 $ 2,411,471 December 31, 2017 Unclassified Classified Total Commercial real estate $ 971,458 $ 16,203 $ 987,661 Commercial and industrial 486,150 21,369 507,519 Residential real estate 370,151 6,554 376,705 Agricultural real estate 77,084 9,402 86,486 Consumer 48,777 584 49,361 Agricultural 88,261 7,286 95,547 Total $ 2,041,881 $ 61,398 $ 2,103,279 Purchased Credit Impaired Loans The Company has acquired loans, for which there was, at acquisition, evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. The table below lists recorded investments in purchase credit impaired loans as of June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Contractually required principal payments $ 43,601 $ 41,349 Discount (12,165 ) (12,492 ) Recorded investment $ 31,436 $ 28,857 The accretable yield associated with these loans was $2,537 and $1,980 as of June 30, 2018 and December 31, 2017. The interest income recognized on these loans for the three-month and six-month periods ended June 30, 2018 and 2017 was $813, $1,378, $699 and $1,412. For the three month period ended June 30, 2018 there was a $25 provision for loan loss recorded for these loans and for the six month period ended June 30, 2018 there was a provision for loan loss reversal of $146 for these loans. For the three and six-month periods ended June 30, 2017, there was a provision for loan losses of $8 and $61 recorded for these loans. Troubled Debt Restructurings The Company had no loans modified under troubled debt restructurings as of June 30, 2018 or December 31, 2017.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	NOTE 4 – DERIVATIVE FINANCIAL INSTRUMENTS The Company is exposed to interest-rate risk primarily from the effect of interest rate changes on its interest-earning assets and its sources of funding these assets. The Company will periodically enter into interest rate swaps or interest rate caps/floors to manage certain interest rate risk exposure. Interest Rate Swaps Designated as Fair Value Hedges: The Company periodically enters into interest rate swaps to hedge the fair value of certain commercial real estate loans. These transactions are designated as fair value hedges. In this type of transaction, the Company typically receives from the counterparty a variable-rate cash flow based on the one-month London Interbank Offered Rate (“LIBOR”) plus a spread to this index and pays a fixed-rate cash flow equal to the customer loan rate. At June 30, 2018, the portfolio of interest rate swaps had a weighted average maturity of 8.1 years, a weighted average pay rate of 4.96% and a weighted average rate received of 4.72%. At December 31, 2017, the portfolio of interest rate swaps had a weighted average maturity of 8.7 years, a weighted average pay rate of 4.94% and a weighted average rate received of 4.13%. Stand-Alone Derivatives: In 2009, the Company purchased an interest rate cap derivative to assist with interest rate risk management. This derivative is not designated as a hedging instrument but rather as a stand-alone derivative. At June 30, 2018, the interest rate cap had a term of 1.4 years and a cap rate of 4.50%. At December 31, 2017, the interest rate cap had a term of 1.9 years and a cap rate of 4.50%. Reconciliation of Derivative Fair Values and Gains/(Losses): The notional amount of a derivative contract is a factor in determining periodic interest payments or cash flows received or paid. The notional amount of derivatives serves as a level of involvement in various types of derivatives. The notional amount does not represent the Company’s overall exposure to credit or market risk, generally, the exposure is significantly smaller. The following table shows the notional balances and fair values (including net accrued interest) of the derivatives outstanding by derivative type at June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Notional Amount Derivative Assets Derivative Liabilities Notional Amount Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate swaps $ 18,119 $ 538 $ — $ 17,231 $ — $ 46 Total derivatives designated as hedging relationships 18,119 538 — 17,231 — 46 Derivatives not designated as hedging instruments: Interest rate caps/floors 2,445 1 — 2,574 1 — Total derivatives not designated as hedging instruments 2,445 1 — 2,574 1 — Total $ 20,564 539 — $ 19,805 1 46 Cash collateral — — — (210 ) Netting adjustments — — 164 164 Net amount presented in Balance Sheet $ 539 $ — $ 165 $ — For the three-month and six-month periods ended June 30, 2018 and 2017, the Company recorded net gains/(losses) on derivatives and hedging activities: Three months ended Six months ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Derivatives designated as hedging instruments: Interest rate swaps $ — $ — $ — $ — Total net gain (loss) related to fair value hedge ineffectiveness — — — — Derivatives not designated as hedging instruments: Economic hedges: Interest rate caps/floors — — — (1 ) Total net gains (losses) related to derivatives not designated as hedging instruments — — — (1 ) Net gains (losses) on derivatives and hedging activities $ — $ — $ — $ (1 ) The following table shows the recorded net gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Company’s net interest income for the three-month periods ended June 30, 2018 and 2017. June 30, 2018 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ 155 $ (155 ) $ — $ (14 ) Total $ 155 $ (155 ) $ — $ (14 ) June 30, 2017 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ (162 ) $ 162 $ — $ (37 ) Total $ (162 ) $ 162 $ — $ (37 ) The following table shows the recorded net gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Company’s net interest income for the six-month periods ended June 30, 2018 and 2017. June 30, 2018 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ 584 $ (584 ) $ — $ (38 ) Total $ 584 $ (584 ) $ — $ (38 ) June 30, 2017 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ (93 ) $ 93 $ — $ (84 ) Total $ (93 ) $ 93 $ — $ (84 )

BORROWINGS

BORROWINGS	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
BORROWINGS	NOTE 5 – BORROWINGS Federal funds purchased and retail repurchase agreements Federal funds purchased and retail repurchase agreements as of June 30, 2018 and December 31, 2017 are listed below. June 30, 2018 December 31, 2017 Federal funds purchased $ — $ — Retail repurchase agreements 41,394 37,492 The Company has available federal funds lines of credit with its correspondent banks. Securities sold under agreements to repurchase (retail repurchase agreements) consist of obligations of the Company to other parties. The obligations are secured by residential mortgage-backed securities held by the Company with a fair value of $43,740 and $44,768 at June 30, 2018 and December 31, 2017. The agreements are on a day-to-day basis and can be terminated on demand. June 30, 2018 December 31, 2017 Year-to-date average daily balance during the period $ 41,391 $ 25,823 Maximum month-end balance year-to-date $ 42,101 $ 43,843 Weighted average interest rate at period-end 0.24 % 0.23 % Federal Home Loan Bank advances Federal Home Loan Bank advances as of June 30, 2018, and December 31, 2017, are listed below. June 30, 2018 December 31, 2017 Federal Home Loan Bank line of credit advances $ 557,619 $ 347,692 Federal Home Loan Bank fixed rate term advances — — Total Federal Home Loan Bank advances $ 557,619 $ 347,692 At June 30, 2018, the Company had $557,619 drawn against its line of credit at a weighted average rate of 2.11%. At December 31, 2017, the $347,692 drawn against the Federal Home Loan Bank line of credit was at a weighted average rate of 1.47%. The advances, Mortgage Partnership Finance credit enhancement obligations and letters of credit were collateralized by certain qualifying loans totaling $819,227 and $478,966 at June 30, 2018 and December 31, 2017. Based on this collateral and the Company’s holdings of Federal Home Loan Bank stock, the Company was eligible to borrow an additional $235,316 and $125,271 at June 30, 2018 and December 31, 2017. Bank stock loan On March 13, 2017, the Company entered into an agreement with an unaffiliated financial institution that provides for a maximum borrowing facility of $30,000, secured by the Company’s stock in Equity Bank. The borrowing facility was renewed on March 12, 2018, and will mature on March 11, 2019. Each draw of funds on the facility will create a separate note that is repayable over a term of five years. Each note will bear interest at a variable interest rate equal to the prime rate published in the “Money Rates” section of The Wall Street Journal Future principal repayments of the June 30, 2018 outstanding balances are as follows: Due in one year or less $ 1,850 Due after one year through two years 1,850 Due after two years through three years 1,850 Due after three years through four years 1,850 Due after four years through five years 2,975 Thereafter 8,000 Total $ 18,375 The terms of the borrowing facility require the Company and Equity Bank to maintain minimum capital ratios and other covenants. In the event of default, the lender has the option to declare all outstanding balances immediately due. The Company believes it is in compliance with the terms of the borrowing facility and has not been otherwise notified of noncompliance.

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
STOCKHOLDERS' EQUITY	NOTE 6 – STOCKHOLDERS’ EQUITY Preferred stock The Company’s articles of incorporation provide for the issuance of 10,000,000 shares of preferred stock. At June 30, 2018 and December 31, 2017, there was no preferred stock outstanding. Common stock The Company’s articles of incorporation provide for the issuance of 45,000,000 shares of Class A voting common stock (“Class A common stock”) and 5,000,000 shares of Class B non-voting common stock (“Class B common stock”), both of which have a par value of $0.01. The following table presents shares that were issued and were held in treasury or were outstanding at June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Class A common stock – issued 17,051,820 15,876,650 Class A common stock – held in treasury (1,271,043 ) (1,271,043 ) Class A common stock – outstanding 15,780,777 14,605,607 Class B common stock – issued 234,903 234,903 Class B common stock – held in treasury (234,903 ) (234,903 ) Class B common stock – outstanding — — Treasury stock is stated at cost, determined by the first-in, first-out method. On May 4, 2018, the Company completed its acquisition of Kansas Banking Corporation (“KBC”), Liberal, Kansas, and Adams Dairy Bancshares, Inc. (“ADBI”), Blue Springs, Missouri. There were a total of 820,849 and 344,063 shares of Class A common stock issued in connection with these acquisitions. Employee stock loans In May 2015, in connection with the termination of a discontinued restricted stock unit plan (“Plan”), the Company agreed to loan electing participants an amount equal to each participant’s federal and state income tax withholding obligation associated with the Plan termination. These loans totaling $121 at June 30, 2018 and $121 at December 31, 2017, are collateralized with the shares received, have a maturity date of December 31, 2018 and have an interest rate of 1.68%. Accumulated other comprehensive income (loss) At June 30, 2018 and December 31, 2017, accumulated other comprehensive income consisted of (i) the after tax effect of unrealized gains (losses) on available-for-sale securities and (ii) the after tax effect of unamortized unrealized gains (losses) on securities transferred from the available-for-sale designation to the held-to-maturity designation. Components of accumulated other comprehensive income as of June 30, 2018 and December 31, 2017, are listed below. Available-for- Sale Securities Held-to- Maturity Securities Accumulated Other Comprehensive Income June 30, 2018 Net unrealized or unamortized gains (losses) $ (5,919 ) $ (2,110 ) $ (8,029 ) Tax effect 1,500 535 2,035 $ (4,419 ) $ (1,575 ) $ (5,994 ) December 31, 2017 Net unrealized or unamortized gains (losses) $ (1,797 ) $ (2,344 ) $ (4,141 ) Tax effect 455 594 1,049 $ (1,342 ) $ (1,750 ) $ (3,092 )

REGULATORY MATTERS

REGULATORY MATTERS	6 Months Ended
	Jun. 30, 2018
Banking And Thrift [Abstract]
REGULATORY MATTERS	NOTE 7 – REGULATORY MATTERS Banks and bank holding companies (on a consolidated basis) are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Company on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. Beginning in January 2016, the implementation of the capital conservation buffer was effective for the Company starting at the 0.625% level and increasing 0.625% each year thereafter, until it reaches 2.5% on January 1, 2019. The capital conservation buffer is designed to absorb losses during periods of economic stress and requires increased capital levels for the purpose of capital distributions and other payments. Failure to meet the full amount of the buffer will result in restrictions on the Company's ability to make capital distributions, including dividend payments and stock repurchases, and to pay discretionary bonuses to executive officers. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as are asset growth and acquisitions, and capital restoration plans are required. As of June 30, 2018, management believes that the Company meets all capital adequacy requirements to which they are subject and the most recent notifications from the federal regulatory agencies categorized Equity Bank as well capitalized under the regulatory framework for prompt corrective action, including the capital conservation buffer. To be categorized as well capitalized, Equity Bank must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed Equity Bank’s category. The Company’s and Equity Bank’s capital amounts and ratios at June 30, 2018 and December 31, 2017 are presented in the table below. Ratios provided for Equity Bancshares, Inc. represent the ratios of the Company on a consolidated basis. Actual Minimum Required for Capital Adequacy Under Basel III Phase-In Minimum Required for Capital Adequacy Under Basel III Fully Phased-In To Be Well Capitalized Under Prompt Corrective Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio June 30, 2018 Total capital to risk weighted assets Equity Bancshares, Inc. $ 322,919 12.03 % $ 265,134 9.88 % $ 281,915 10.50 % $ N/A N/A Equity Bank 321,821 11.99 % 265,130 9.88 % 281,911 10.50 % 268,486 10.00 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 312,836 11.65 % 211,436 7.88 % 228,217 8.50 % N/A N/A Equity Bank 311,738 11.61 % 211,433 7.88 % 228,213 8.50 % 214,789 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 298,723 11.13 % 171,163 6.38 % 187,943 7.00 % N/A N/A Equity Bank 311,738 11.61 % 171,160 6.38 % 187,940 7.00 % 174,516 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 312,836 9.36 % 133,627 4.00 % 133,627 4.00 % N/A N/A Equity Bank 311,738 9.33 % 133,642 4.00 % 133,642 4.00 % 167,052 5.00 % December 31, 2017 Total capital to risk weighted assets Equity Bancshares, Inc. $ 288,353 12.54 % $ 212,705 9.25 % $ 241,449 10.50 % $ N/A N/A Equity Bank 279,712 12.17 % 212,682 9.25 % 241,423 10.50 % 229,927 10.0 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 279,855 12.17 % 166,715 7.25 % 195,459 8.50 % N/A N/A Equity Bank 271,214 11.80 % 166,697 7.25 % 195,438 8.50 % 183,942 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 265,887 11.56 % 132,222 5.75 % 160,966 7.00 % N/A N/A Equity Bank 271,214 11.80 % 132,208 5.75 % 160,949 7.00 % 149,452 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 279,855 10.33 % 108,372 4.00 % 108,372 4.00 % N/A N/A Equity Bank 271,214 10.01 % 108,351 4.00 % 108,351 4.00 % 135,439 5.00 % Equity Bank is subject to certain restrictions on the amount of dividends that it may declare without prior regulatory approval.

EARNINGS PER SHARE

EARNINGS PER SHARE	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 8 – EARNINGS PER SHARE The following table presents earnings per share for the three and six months ended June 30, 2018 and 2017. Three months ended Six months ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Basic: Net income allocable to common stockholders $ 6,867 $ 6,354 $ 15,578 $ 11,218 Weighted average common shares outstanding 15,353,421 12,203,252 14,982,077 12,009,238 Weighted average vested restricted stock units 11,230 1,843 8,019 1,300 Weighted average shares 15,364,651 12,205,095 14,990,096 12,010,538 Basic earnings per common share $ 0.45 $ 0.52 $ 1.04 $ 0.93 Diluted: Net income allocable to common stockholders $ 6,867 $ 6,354 $ 15,578 $ 11,218 Weighted average common shares outstanding for: Basic earnings per common share 15,364,651 12,205,095 14,990,096 12,010,538 Dilutive effects of the assumed exercise of stock options 304,999 237,267 292,165 251,785 Dilutive effects of the assumed vesting of restricted stock units 20,461 2,497 12,126 1,833 Average shares and dilutive potential common shares 15,690,111 12,444,859 15,294,387 12,264,156 Diluted earnings per common share $ 0.44 $ 0.51 $ 1.02 $ 0.91 Average outstanding stock options of 125,051 and 205,269 for the three-month periods ended June 30, 2018 and 2017 and 119,928 and 162,986 for the six-month periods ended June 30, 2018 and 2017 were not included in the computation of diluted earnings per share because the options were antidilutive.

FAIR VALUE

FAIR VALUE	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE	NOTE 9 – FAIR VALUE The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to disclose the fair value of its financial instruments. Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. For disclosure purposes, the Company groups its financial and non-financial assets and liabilities into three different levels based on the nature of the instrument and the availability and reliability of the information that is used to determine fair value. The three levels of inputs that may be used to measure fair values are defined as follows: Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Level 1 inputs are considered to be the most transparent and reliable. The Company assumes the use of the principal market to conduct a transaction of each particular asset or liability being measured and then considers the assumptions that market participants would use when pricing the asset or liability. Whenever possible, the Company first looks for quoted prices for identical assets or liabilities in active markets (Level 1 inputs) to value each asset or liability. However, when inputs from identical assets or liabilities on active markets are not available, the Company utilizes market observable data for similar assets and liabilities. The Company maximizes the use of observable inputs and limits the use of unobservable inputs to occasions when observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity of the actual financial instrument or of the underlying collateral. Although, in some instances, third party price indications may be available, limited trading activity can challenge the implied value of those quotations. The following is a description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of each instrument under the hierarchy: Fair Value of Assets and Liabilities Measured on a Recurring Basis The fair values of securities available-for-sale are carried at fair value on a recurring basis. To the extent possible, observable quoted prices in an active market are used to determine fair value and, as such, these securities are classified as Level 1. For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities, generally determined by matrix pricing, which is a mathematical technique widely used in the industry to value securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The Company’s available-for-sale securities, including U.S. Government sponsored entity securities, residential mortgage-backed securities (all of which are issued or guaranteed by government sponsored agencies), corporate securities, Small Business Administration securities, and State and Political Subdivision securities are classified as Level 2. The fair values of derivatives are determined based on a valuation pricing model using readily available observable market parameters such as interest rate yield curves (Level 2 inputs) adjusted for credit risk attributable to the seller of the interest rate derivative. Cash collateral received from or delivered to a derivative counterparty is classified as Level 1. Assets and liabilities measured at fair value on a recurring basis are summarized in the following table. June 30, 2018 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: Residential mortgage-backed securities (issued by government-sponsored entities) $ — $ 180,238 $ — Derivative assets: Derivative assets (included in other assets) — 539 — Cash collateral held by counterparty — — — Total derivative assets — 539 — Total assets $ — $ 180,777 $ — December 31, 2017 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: Residential mortgage-backed securities (issued by government-sponsored entities) $ — $ 161,591 $ — State and political subdivisions — 195 — Equity securities 486 — — Derivative assets: Derivative assets (included in other assets) — 1 — Cash collateral held by counterparty 164 — — Total derivative assets 164 1 — Total assets $ 650 $ 161,787 $ — Liabilities: Derivative liabilities: Interest rate swaps (included in other liabilities) $ — $ 46 $ — Cash collateral held by counterparty (46 ) — — Total derivative liabilities (46 ) 46 — Total liabilities $ (46 ) $ 46 $ — There were no material transfers between levels during the six months ended June 30, 2018 or the year ended December 31, 2017. The Company’s policy is to recognize transfers into or out of a level as of the end of a reporting period. Fair Value of Assets and Liabilities Measured on a Non-recurring Basis Certain assets are measured at fair value on a non-recurring basis when there is evidence of impairment. The fair value of impaired securities is determined as discussed previously for available-for-sale securities. The fair values of impaired loans with specific allocations of the allowance for loan losses are generally based on recent real estate appraisals of the collateral less estimated cost to sell. Declines in the fair values of other real estate owned subsequent to their initial acquisitions are also based on recent real estate appraisals less selling costs. Real estate appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in a Level 3 classification of the inputs for determining fair value. Assets measured at fair value on a non-recurring basis are summarized below. June 30, 2018 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 431 Commercial and industrial — — 381 Residential real estate — — 3,848 Agricultural real estate — — 255 Other — — 601 Other real estate owned: Commercial real estate — — 1,604 Residential real estate — — 131 December 31, 2017 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 1,439 Commercial and industrial — — 1,005 Residential real estate — — 4,021 Agricultural real estate — — 905 Other — — 1,910 Other real estate owned: Commercial real estate — — 1,018 Residential real estate — — 157 The Company did not record any liabilities for which the fair value was measured on a non-recurring basis at June 30, 2018 or at December 31, 2017. Valuations of impaired loans and other real estate owned utilize third party appraisals or broker price opinions, and were classified as Level 3 due to the significant judgment involved. Appraisals may include the utilization of unobservable inputs, subjective factors, and quantitative data to estimate fair market value. The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a nonrecurring basis that were categorized with Level 3 of the fair value hierarchy: Fair Value Valuation Technique Unobservable Input Range (weighted June 30, 2018 Impaired loans $ 5,516 Sales Approach Adjustments for differences comparable sales 15%-26% (5%) December 31, 2017 Impaired loans $ 9,280 Sales Approach Adjustments for differences comparable sales 15%-26% (5%) Measurable inputs for other real estate owned were not material. Carrying amount and estimated fair values of financial instruments at period end were as follows as of the date indicated: June 30, 2018 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 47,691 $ 47,691 $ 47,691 $ — $ — Interest bearing deposits 6,991 6,991 — 6,991 — Available-for-sale securities 180,238 180,238 — 180,238 — Held-to-maturity securities 665,995 653,012 — 653,012 — Loans held for sale 43,875 43,875 — 43,875 — Loans, net of allowance for loan losses 2,401,388 2,406,148 — — 2,406,148 Federal Reserve Bank and Federal Home Loan Bank stock 35,681 N/A N/A N/A N/A Interest receivable 14,343 14,343 — 14,343 — Derivative assets 539 539 — 539 — Cash collateral held by derivative counterparty — — — — — Total derivative assets 539 539 — 539 — Total assets $ 3,396,741 $ 3,352,837 $ 47,691 $ 898,998 $ 2,406,148 Financial liabilities: Deposits $ 2,635,048 $ 2,636,114 $ — $ 2,636,114 $ — Federal funds purchased and retail repurchase agreements 41,394 41,394 — 41,394 — Federal Home Loan Bank advances 557,619 557,619 — 557,619 — Bank stock loan 18,375 18,375 — 18,375 — Subordinated debentures 14,113 14,113 — 14,113 — Contractual obligations 1,734 1,734 — 1,734 — Interest payable 2,686 2,686 — 2,686 — Total liabilities $ 3,270,969 $ 3,272,035 $ — $ 3,272,035 $ — December 31, 2017 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 52,195 $ 52,195 $ 52,195 $ — $ — Interest bearing deposits 3,496 3,496 — 3,496 — Available-for-sale securities 162,272 162,272 486 161,786 — Held-to-maturity securities 535,462 532,744 — 532,744 — Loans held for sale 16,344 16,344 — 16,344 — Loans, net of allowance for loan losses 2,094,781 2,098,431 — — 2,098,431 Federal Reserve Bank and Federal Home Loan Bank stock 24,373 N/A N/A N/A N/A Interest receivable 12,371 12,371 — 12,371 — Derivative assets 1 1 — 1 — Cash collateral held by derivative counterparty 164 164 164 — — Total derivative assets 165 165 164 1 — Total assets $ 2,901,459 $ 2,878,018 $ 52,845 $ 726,742 $ 2,098,431 Financial liabilities: Deposits $ 2,382,013 $ 2,385,528 $ — $ 2,385,528 $ — Federal funds purchased and retail repurchase agreements 37,492 37,492 — 37,492 — Federal Home Loan Bank advances 347,692 347,692 — 347,692 — Bank stock loan 2,500 2,500 — 2,500 — Subordinated debentures 13,968 13,968 — 13,968 — Contractual obligations 1,967 1,967 — 1,967 — Interest payable 1,932 1,932 — 1,932 — Derivative liabilities 46 46 — 46 — Cash collateral held by derivative counterparty (46 ) (46 ) (46 ) — — Total derivative liabilities — — (46 ) 46 — Total liabilities $ 2,787,564 $ 2,791,079 $ (46 ) $ 2,791,125 $ — The methods and assumptions, not previously presented, used to estimate fair values are described as follows: Cash and cash equivalents and interest-bearing deposits Held-to-maturity securities Loans held for sale Loans Federal Reserve Bank and Federal Home Loan Bank stock Interest receivable and interest payable Deposits Federal funds purchased and retail repurchase agreements Federal Home Loan Bank Advances Bank stock loan Subordinated debentures Contractual obligations The fair value of off-balance-sheet items is not considered material.

COMMITMENTS AND CREDIT RISK

COMMITMENTS AND CREDIT RISK	6 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
COMMITMENTS AND CREDIT RISK	NOTE 10 – COMMITMENTS AND CREDIT RISK The Company extends credit for commercial real estate mortgages, residential mortgages, working capital financing and loans to businesses and consumers. Commitments to Originate Loans and Available Lines of Credit The contractual amounts of commitments to originate loans and available lines of credit as of June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $ 32,667 $ 171,455 $ 38,031 $ 67,107 Mortgage loans in the process of origination 22,242 3,901 14,803 9,258 Unused lines of credit 94,429 161,038 87,948 141,026 The fixed rate loan commitments have interest rates ranging from 3.75% to 8.50% and maturities ranging from 1 month to 110 months. Standby Letters of Credit The contractual amounts of standby letters of credit as of June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Fixed Rate Variable Rate Fixed Rate Variable Rate Standby letters of credit $ 4,563 $ 2,620 $ 4,064 $ 3,830

LEGAL MATTERS

LEGAL MATTERS	6 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
LEGAL MATTERS	NOTE 11 – LEGAL MATTERS The Company is party to various matters of litigation in the ordinary course of business. The Company periodically reviews all outstanding pending or threatened legal proceedings and determines if such matters will have an adverse effect on the business, financial condition or results of operations or cash flows. A loss contingency is recorded when the outcome is probable and reasonably able to be estimated. The following loss contingency has been identified by the Company as reasonably possible to result in an unfavorable outcome for the Company or the Bank. Equity Bank is a party to a February 3, 2015 lawsuit filed against it by CitiMortgage, Inc., (“Citi”). The lawsuit involves an alleged breach of contract related to loan repurchase obligations and damages of $2,700 plus pre-judgment and post-judgment interest. In January 2018, judgement was entered by the court dismissing Citi’s claims with regard to six loans and holding Equity Bank liable with regard to six loans. A loss contingency of $477 was recorded at December 31, 2017, in connection with this case. Subsequently, Citi appealed the courts decision. Equity Bank believes it has numerous and meritorious defenses to the claims and continues to contest the matter vigorously. Except for the above mentioned lawsuit, there are no other outstanding claims for potential repurchase or indemnification demands regarding mortgage loans originated by Equity Bank and sold to investors. However, the Company believes there is possible risk it may face similar demands based on comparable demands loan aggregators are facing from their investors, including Government Sponsored Entities such as Freddie Mac and Fannie Mae, and or settlement agreements loan aggregators have entered into with those investors. The amount of potential loss and outcome of such possible litigation, if it were commenced, is uncertain and the Company would vigorously contest any claims.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
BUSINESS COMBINATIONS	NOTE 12 – BUSINESS COMBINATIONS On May 4, 2018, the Company acquired 100% of the outstanding common shares of Kansas Bank Corporation (“KBC”), based in Liberal, Kansas. Results of operations of KBC were included in the Company’s results of operations beginning May 5, 2018. Acquisition-related costs associated with this merger were $4,122 ($3,151 on an after-tax basis) and are included in merger expenses in the Company’s income statement for the six months ended June 30, 2018. Information necessary to recognize the fair value of assets acquired and liabilities assumed is not complete at June 30, 2018. The fair value of consideration exchanged exceeded the recognized amounts of the identifiable net assets and resulted in goodwill of $13,607. Goodwill resulted from a combination of expected synergies, expansion into southwest Kansas with the addition of five branch locations, growth opportunities and increases in stock prices after the stock exchange ratios were negotiated. The following table summarizes the consideration paid for KBC and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date: Fair value of consideration: Common stock $ 32,103 Cash 14,918 $ 47,021 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and due from banks $ 27,899 Available-for-sale securities 22,820 Held-to-maturity securities 92,028 Federal Reserve Bank and Federal Home Loan Bank stock 475 Loans 159,898 Premises and equipment 5,835 Core deposit intangible 8,080 Other assets 5,482 Total assets acquired 322,517 Deposits 288,352 Interest payable and other liabilities 751 Total liabilities assumed 289,103 Total identifiable net assets 33,414 Goodwill 13,607 $ 47,021 The fair value of net assets acquired includes fair value adjustments to certain loans that were not considered impaired as of the acquisition date. The fair value adjustments were determined using discounted contractual cash flows. However, the Company believes that all contractual cash flows related to these financial instruments will be collected. As such, these loans were not considered impaired at the acquisition date and were not subject to the guidance relating to purchased credit impaired loans, which have shown evidence of credit deterioration since origination. Cash flows associated with purchase credit impaired loans are not considered reasonably predictable and as such these loans are classified nonaccrual. The following table presents information about the loans acquired in the KBC merger as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Contractually required principal $ 160,526 $ 5,066 Non-accretable difference (expected losses) — (2,305 ) Cash flows expected to be collected 160,526 2,761 Accretable yield (3,389 ) — Fair value of acquired loans $ 157,137 $ 2,761 The following table presents the carrying value of the loans acquired in the KBC acquisition by class, as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Total Commercial real estate $ 94,924 $ 1,975 $ 96,899 Commercial and industrial 18,848 622 19,470 Residential real estate 2,898 - 2,898 Agricultural real estate 22,532 - 22,532 Consumer 3,539 - 3,539 Agricultural 14,396 164 14,560 Fair value of acquired loans $ 157,137 $ 2,761 $ 159,898 Also on May 4, 2018, the Company acquired 100% of the outstanding common shares of Adams Dairy Bancshares, Inc. (“ADBI”), based in Blue Springs, Missouri. Results of operations of ADBI were included in the Company’s results of operations beginning May 5, 2018. Acquisition-related costs associated with this merger were $1,049 ($813 on an after-tax basis) and are included in merger expenses in the Company’s income statement for the six months ended June 30, 2018. Information necessary to recognize the fair value of assets acquired and liabilities assumed is not complete at June 30, 2018. The fair value of consideration exchanged exceeded the recognized amounts of the identifiable net assets and resulted in goodwill of $8,465. Goodwill resulted from a combination of expected synergies, expansion in the Kansas City metro area with the addition of one branch location, growth opportunities and increases in stock prices after the stock exchange ratios were negotiated. The following table summarizes the consideration paid for ADBI and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date: Fair value of consideration: Common stock $ 13,456 Cash 3,960 $ 17,416 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and due from banks $ 2,812 Interest bearing time deposits in other banks 4,237 Available-for-sale securities 10,677 Held-to-maturity securities 335 Federal Reserve Bank and Federal Home Loan Bank stock 194 Loans 82,716 Premises and equipment 4,485 Bank-owned life insurance 2,869 Core deposit intangible 1,990 Other assets 1,042 Total assets acquired 111,357 Deposits 97,124 Federal Home Loan Bank advances 1,000 Interest payable and other liabilities 4,282 Total liabilities assumed 102,406 Total identifiable net assets 8,951 Goodwill 8,465 $ 17,416 The following table presents information about the loans acquired in the ADBI merger as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Contractually required principal $ 84,225 $ 1,477 Non-accretable difference (expected losses) — (238 ) Cash flows expected to be collected 84,225 1,239 Accretable yield (2,748 ) — Fair value of acquired loans $ 81,477 $ 1,239 The following table presents the carrying value of the loans acquired in the ADBI acquisition by class, as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Total Commercial real estate $ 74,657 $ 820 $ 75,477 Commercial and industrial 1,002 419 1,421 Residential real estate 4,955 - 4,955 Consumer 863 - 863 Fair value of acquired loans $ 81,477 $ 1,239 $ 82,716 The acquisitions of KBC and ADBI are not considered significant to the Company’s financial statements and therefore pro forma financial data is not included. Separate revenue and earnings of the former KBC and ADBI are not available subsequent to the business combinations. During the first six months of 2018 an adjustment was made to purchase accounting related to the November 2017 merger with Cache Holdings, Inc. (“Cache”) resulting in a $1,550 decrease to goodwill and a corresponding increase to deferred tax assets. Also, during the first six months of 2018 an additional $55 was paid to stockholders related to the November 2017 merger with Eastman National Bancshares, Inc. (“Eastman”) resulting in an increase to goodwill. On June 12, 2018, the Company entered into an agreement and plan of merger with Docking Bancshares, Inc. to acquire City Bank and Trust Company (“City Bank”), which has one branch location in Guymon, Oklahoma. The transaction is expected to close in the fourth quarter of 2018, subject to customary closing conditions, including the receipt of regulatory approval. In their June 30, 2018 unaudited Consolidated Report of Condition, City Bank reported total assets of $171,693, which included total loans of $78,978 and securities of $47,294. At June 30, 2018, total liabilities of $153,316 were reported by City Bank, which included deposits of $133,305. City Bank reported $394 in net income before income taxes for the six months ended June 30, 2018. The Company anticipates there will be goodwill and core deposit intangibles recorded with this acquisition. Goodwill is calculated as the excess of the cash consideration transferred over the net of the acquisition-date fair value of identifiable assets acquired and liabilities assumed.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	6 Months Ended
	Jun. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recent Accounting Pronouncements	Adoption of New Accounting Standards: On January 1, 2018, the Company adopted ASU 2014-09 Revenue from Contracts with Customers The Company adopted ASC 606 using the modified retrospective method applied to all contracts not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018, are presented under ASC 606, while prior period amounts continue to be reported in accordance with legacy GAAP. The adoption of ASC 606 did not result in a change to the accounting for any of the in-scope revenue streams; as such, no cumulative effect adjustment was recorded. Except for gains or losses from the sale of OREO, all of the Company’s revenue from contracts with customers within the scope of ASC 606 is recognized in non-interest income. The following table presents the Company’s sources of non-interest income for the three and six months ended June 30, 2018, and 2017. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Non-interest income Service charges and fees $ 1,729 $ 1,224 $ 3,309 $ 2,449 Debit card income 1,522 1,205 2,775 2,210 Mortgage banking (a) 312 540 625 1,025 Increase in bank-owned life insurance (a) 508 354 1,160 709 Net gain (loss) from securities transactions (a) (2 ) 83 (10 ) 96 Other (b) 523 556 984 812 Total $ 4,592 $ 3,962 $ 8,843 $ 7,301 (a) (b) A description of the Company’s revenue streams accounted for under ASC 606 follows: Service Charges and Fees: Debit Card Income: Investment Referral Income: Insurance Sales Commissions: Other Non-interest Income: Gain or Loss on Sale of Other Real Estate: On January 1, 2018, the Company adopted ASU 2016-01 Recognition and Measurement of Financial Assets and Financial Liabilities Also on January 1, 2018, the Company adopted ASU 2016-15, Statement of Cash Flows (Topic 230) Recent Accounting Pronouncements: In February 2016, FASB issued ASU 2016-02, Leases, Leases – Targeted Improvements In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses, In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other In March 2017, the FASB issued ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities In August 2017, FASB issued ASU 2017-12, Derivatives and Hedging, Targeted Improvements to Accounting for Hedging Activities In February 2018, FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

BASIS OF PRESENTATION (Tables)

BASIS OF PRESENTATION (Tables)	6 Months Ended
	Jun. 30, 2018
Accounting Standards Update 2014-09 [Member]
Summary of Company's Source of Non-interest Income	Except for gains or losses from the sale of OREO, all of the Company’s revenue from contracts with customers within the scope of ASC 606 is recognized in non-interest income. The following table presents the Company’s sources of non-interest income for the three and six months ended June 30, 2018, and 2017. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Non-interest income Service charges and fees $ 1,729 $ 1,224 $ 3,309 $ 2,449 Debit card income 1,522 1,205 2,775 2,210 Mortgage banking (a) 312 540 625 1,025 Increase in bank-owned life insurance (a) 508 354 1,160 709 Net gain (loss) from securities transactions (a) (2 ) 83 (10 ) 96 Other (b) 523 556 984 812 Total $ 4,592 $ 3,962 $ 8,843 $ 7,301 (a) (b)

SECURITIES (Tables)

SECURITIES (Tables)	6 Months Ended
	Jun. 30, 2018
Amortized Cost and Fair Value of Securities Available-for-Sale	The amortized cost and fair value of available-for-sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income are listed below. Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value June 30, 2018 Available-for-sale securities Residential mortgage-backed securities (issued by government-sponsored entities) $ 186,157 $ — $ (5,919 ) $ 180,238 $ 186,157 $ — $ (5,919 ) $ 180,238 December 31, 2017 Available-for-sale securities Residential mortgage-backed securities (issued by government-sponsored entities) $ 163,374 $ 36 $ (1,819 ) $ 161,591 State and political subdivisions 195 — — 195 Equity securities 500 — (14 ) 486 $ 164,069 $ 36 $ (1,833 ) $ 162,272
Amortized Cost and Fair Value of Securities Held-to-Maturity	The amortized cost and fair value of held-to-maturity securities and the related gross unrecognized gains and losses are listed in the following table. Amortized Cost Gross Unrecognized Gains Gross Unrecognized Losses Fair Value June 30, 2018 Held-to-maturity securities U.S. Government-sponsored entities $ 5,358 $ — $ (24 ) $ 5,334 Residential mortgage-backed (securities issued by government sponsored entities) 481,294 255 (12,521 ) 469,028 Corporate 22,993 372 (35 ) 23,330 Small Business Administration loan pools 1,884 — (34 ) 1,850 State and political subdivisions 154,466 736 (1,732 ) 153,470 $ 665,995 $ 1,363 $ (14,346 ) $ 653,012 December 31, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ 998 $ — $ (13 ) $ 985 Residential mortgage-backed (securities issued by government sponsored entities) 383,875 573 (4,866 ) 379,582 Corporate 22,991 355 — 23,346 Small Business Administration loan pools 2,048 — (14 ) 2,034 State and political subdivisions 125,550 1,694 (447 ) 126,797 $ 535,462 $ 2,622 $ (5,340 ) $ 532,744
Fair Value and Amortized Cost of Debt Securities by Contractual Maturity	The fair value and amortized cost of debt securities at June 30, 2018, by contractual maturity, is shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. Available-for-Sale Held-to-Maturity Amortized Cost Fair Value Amortized Cost Fair Value Within one year $ — $ — $ 5,055 $ 5,057 One to five years — — 35,190 35,342 Five to ten years — — 56,830 57,288 After ten years — — 87,626 86,297 Mortgage-backed securities 186,157 180,238 481,294 469,028 Total debt securities $ 186,157 $ 180,238 $ 665,995 $ 653,012
Proceeds from Sales and Associated Gains and Losses Reclassified from Other comprehensive Income to Income	The proceeds from sales and the associated gains and losses on available-for-sale securities reclassified from other comprehensive income to income are listed in the table below. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Proceeds $ — $ 3,083 $ — $ 6,522 Gross gains — 83 — 96 Gross losses — — — — Income tax expense on net realized gains — 32 — 37
Available for Sale Securities [Member]
Summary of Gross Unrealized Losses and Fair Value of Securities	The following tables show gross unrealized losses and fair value, aggregated by investment category, and length of time that individual securities have been in a continuous unrealized loss position at June 30, 2018 and December 31, 2017. Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2018 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 127,047 $ (3,265 ) $ 52,954 $ (2,654 ) $ 180,001 $ (5,919 ) Total temporarily impaired securities $ 127,047 $ (3,265 ) $ 52,954 $ (2,654 ) $ 180,001 $ (5,919 ) December 31, 2017 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 78,884 $ (437 ) $ 58,540 $ (1,382 ) $ 137,424 $ (1,819 ) Equity securities — — 486 (14 ) 486 (14 ) Total temporarily impaired securities $ 78,884 $ (437 ) $ 59,026 $ (1,396 ) $ 137,910 $ (1,833 )
Held to Maturity Securities [Member]
Summary of Gross Unrealized Losses and Fair Value of Securities	Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2018 Held-to-maturity securities U.S. Government-sponsored entities $ 2,374 $ (1 ) $ 975 $ (23 ) $ 3,349 $ (24 ) Residential mortgage-backed (issued by government-sponsored entities) 185,445 (4,663 ) 181,293 (9,301 ) 366,738 (13,964 ) Corporate 5,166 (114 ) — — 5,166 (114 ) Small Business Administration loan pools 846 (16 ) 1,004 (40 ) 1,850 (56 ) State and political subdivisions 64,467 (944 ) 26,545 (1,135 ) 91,012 (2,079 ) Total temporarily impaired securities $ 258,298 $ (5,738 ) $ 209,817 $ (10,499 ) $ 468,115 $ (16,237 ) December 31, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ — $ — $ 985 $ (13 ) $ 985 $ (13 ) Residential mortgage-backed (issued by government-sponsored entities) 147,281 (1,263 ) 198,239 (5,030 ) 345,520 (6,293 ) Corporate 5,312 (16 ) — — 5,312 (16 ) Small Business Administration loan pools 926 (1 ) 1,108 (38 ) 2,034 (39 ) State and political subdivisions 22,100 (123 ) 26,387 (439 ) 48,487 (562 ) Total temporarily impaired securities $ 175,619 $ (1,403 ) $ 226,719 $ (5,520 ) $ 402,338 $ (6,923 )

LOANS AND ALLOWANCE FOR LOAN 24

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Categories of Loans	The following table lists categories of loans at June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Commercial real estate $ 1,226,397 $ 987,661 Commercial and industrial 503,716 507,519 Residential real estate 409,571 376,705 Agricultural real estate 118,241 86,486 Consumer 54,464 49,361 Agricultural 99,082 95,547 Total loans 2,411,471 2,103,279 Allowance for loan losses (10,083 ) (8,498 ) Net loans $ 2,401,388 $ 2,094,781
Schedule of Allowance for Loan Losses by Portfolio Segment Allowance	The following tables present the activity in the allowance for loan losses by class for the three-month periods ended June 30, 2018 and 2017. June 30, 2018 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 3,010 $ 2,388 $ 2,442 $ 267 $ 878 $ 331 $ 9,316 Provision for loan losses 216 (64 ) 185 147 247 19 750 Loans charged-off — (77 ) (148 ) (80 ) (203 ) (4 ) (512 ) Recoveries 269 7 184 — 61 8 529 Total ending allowance balance $ 3,495 $ 2,254 $ 2,663 $ 334 $ 983 $ 354 $ 10,083 June 30, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,592 $ 2,059 $ 1,875 $ 66 $ 391 $ 65 $ 7,048 Provision for loan losses (245 ) 397 58 46 298 74 628 Loans charged-off (29 ) (409 ) (27 ) (3 ) (242 ) — (710 ) Recoveries 406 23 93 — 75 5 602 Total ending allowance balance $ 2,724 $ 2,070 $ 1,999 $ 109 $ 522 $ 144 $ 7,568 The following tables present the activity in the allowance for loan losses by class for the six-month periods ended June 30, 2018 and 2017. June 30, 2018 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,740 $ 2,136 $ 2,262 $ 319 $ 768 $ 273 $ 8,498 Provision for loan losses 507 196 475 92 535 115 1,920 Loans charged-off (29 ) (86 ) (271 ) (80 ) (509 ) (43 ) (1,018 ) Recoveries 277 8 197 3 189 9 683 Total ending allowance balance $ 3,495 $ 2,254 $ 2,663 $ 334 $ 983 $ 354 $ 10,083 June 30, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,420 $ 1,881 $ 1,765 $ 35 $ 266 $ 65 $ 6,432 Provision for loan losses (78 ) 585 374 77 650 115 1,723 Loans charged-off (92 ) (422 ) (238 ) (3 ) (601 ) (41 ) (1,397 ) Recoveries 474 26 98 — 207 5 810 Total ending allowance balance $ 2,724 $ 2,070 $ 1,999 $ 109 $ 522 $ 144 $ 7,568
Schedule of Loans Evaluated for Impairment	The following tables present the recorded investment in loans and the balance in the allowance for loan losses by portfolio and class based on impairment method as of June 30, 2018 and December 31, 2017. June 30, 2018 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 28 $ 27 $ 411 $ 25 $ 49 $ 12 $ 552 Collectively evaluated for impairment 3,460 2,212 2,235 306 934 336 9,483 Purchase credit impaired loans 7 15 17 3 — 6 48 Total $ 3,495 $ 2,254 $ 2,663 $ 334 $ 983 $ 354 $ 10,083 Loan Balance: Individually evaluated for impairment $ 2,029 $ 5,242 $ 4,851 $ 2,496 $ 523 $ 280 $ 15,421 Collectively evaluated for impairment 1,209,070 491,874 402,324 110,974 53,936 96,436 2,364,614 Purchase credit impaired loans 15,298 6,600 2,396 4,771 5 2,366 31,436 Total $ 1,226,397 $ 503,716 $ 409,571 $ 118,241 $ 54,464 $ 99,082 $ 2,411,471 December 31, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 130 $ 87 $ 386 $ 46 $ 56 $ 36 $ 741 Collectively evaluated for impairment 2,582 2,028 1,815 190 712 236 7,563 Purchase credit impaired loans 28 21 61 83 — 1 194 Total $ 2,740 $ 2,136 $ 2,262 $ 319 $ 768 $ 273 $ 8,498 Loan Balance: Individually evaluated for impairment $ 2,728 $ 7,886 $ 4,829 $ 533 $ 556 $ 1,050 $ 17,582 Collectively evaluated for impairment 971,376 493,903 369,471 82,493 48,802 90,795 2,056,840 Purchase credit impaired loans 13,557 5,730 2,405 3,460 3 3,702 28,857 Total $ 987,661 $ 507,519 $ 376,705 $ 86,486 $ 49,361 $ 95,547 $ 2,103,279
Impaired Loans, Segregated by Class of Loans	The following table presents information related to impaired loans, excluding purchased credit impaired loans which have not deteriorated since acquisition, by class of loans as of June 30, 2018 and December 31, 2017. The recorded investment in loans excludes accrued interest receivable due to immateriality. June 30, 2018 December 31, 2017 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated With no related allowance recorded: Commercial real estate $ 1,690 $ 1,629 $ — $ 1,878 $ 1,567 $ — Commercial and industrial 6,271 4,970 — 8,679 8,020 — Residential real estate 747 742 — 1,230 969 — Agricultural real estate 2,273 2,242 — 52 52 — Consumer 41 38 — 1 — — Agricultural 162 158 — 7 7 — Subtotal 11,184 9,779 — 11,847 10,615 — With an allowance recorded: Commercial real estate 628 466 35 4,049 1,597 158 Commercial and industrial 511 423 42 1,310 1,113 108 Residential real estate 4,492 4,276 428 4,868 4,468 447 Agricultural real estate 300 283 28 1,266 1,034 129 Consumer 592 486 49 677 559 56 Agricultural 210 182 18 1,798 1,444 37 Subtotal 6,733 6,116 600 13,968 10,215 935 Total $ 17,917 $ 15,895 $ 600 $ 25,815 $ 20,830 $ 935 The tables below present average recorded investment and interest income related to impaired loans for the three months and six months ended June 30, 2018 and 2017. Interest income recognized in the following table was substantially recognized on the cash basis. The recorded investment in loans excludes accrued interest receivable due to immateriality. As of and for the three months ended June 30, 2018 June 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 1,773 $ 118 $ 1,099 $ — Commercial and industrial 6,186 56 1,034 — Residential real estate 565 9 330 1 Agricultural real estate 1,189 11 31 12 Consumer 19 — — — Agricultural 307 18 7 — Subtotal 10,039 212 2,501 13 With an allowance recorded: Commercial real estate 665 1 2,229 7 Commercial and industrial 514 — 558 — Residential real estate 3,774 22 3,563 13 Agricultural real estate 313 2 339 — Consumer 473 3 383 2 Agricultural 218 4 150 — Subtotal 5,957 32 7,222 22 Total $ 15,996 $ 244 $ 9,723 $ 35 As of and for the six months ended June 30, 2018 June 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 1,704 $ 118 $ 841 $ 7 Commercial and industrial 6,797 66 667 3 Residential real estate 700 10 688 1 Agricultural real estate 810 12 437 12 Consumer 13 — 26 — Agricultural 207 18 6 — Subtotal 10,231 224 2,665 23 With an allowance recorded: Commercial real estate 975 2 2,195 9 Commercial and industrial 714 — 378 1 Residential real estate 4,005 22 3,207 15 Agricultural real estate 553 2 211 — Consumer 502 3 368 2 Agricultural 627 4 141 — Subtotal 7,376 33 6,500 27 Total $ 17,607 $ 257 $ 9,165 $ 50
Schedule of Aging of Recorded Investment in Past Due Loans by Segment and Class of Loans	The following tables present the aging of the recorded investment in past due loans as of June 30, 2018 and December 31, 2017, by portfolio and class of loans. June 30, 2018 30 - 59 Days Past Due 60 - 89 Days Past Due Greater Than 90 Days Past Due Still On Accrual Nonaccrual Loans Not Past Due Total Commercial real estate $ 1,762 $ 301 $ — $ 12,603 $ 1,211,731 $ 1,226,397 Commercial and industrial 208 754 302 11,114 491,338 503,716 Residential real estate 710 627 — 5,371 402,863 409,571 Agricultural real estate — — — 5,690 112,551 118,241 Consumer 336 62 — 524 53,542 54,464 Agricultural 52 99 — 2,646 96,285 99,082 Total $ 3,068 $ 1,843 $ 302 $ 37,948 $ 2,368,310 $ 2,411,471 December 31, 2017 30 - 59 Days Past Due 60 - 89 Days Past Due Greater Than 90 Days Past Due Still On Accrual Nonaccrual Loans Not Past Due Total Commercial real estate $ 1,284 $ 22 $ — $ 11,607 $ 974,748 $ 987,661 Commercial and industrial 251 6 — 13,217 494,045 507,519 Residential real estate 1,457 1,176 — 6,148 367,924 376,705 Agricultural real estate 123 — — 3,993 82,370 86,486 Consumer 359 112 — 559 48,331 49,361 Agricultural 415 — — 4,752 90,380 95,547 Total $ 3,889 $ 1,316 $ — $ 40,276 $ 2,057,798 $ 2,103,279
Summary of Risk Category of Loans by Class of Loans	The risk category of loans by class of loans is as follows as of June 30, 2018 and December 31, 2017. June 30, 2018 Unclassified Classified Total Commercial real estate $ 1,211,285 $ 15,112 $ 1,226,397 Commercial and industrial 486,469 17,247 503,716 Residential real estate 403,988 5,583 409,571 Agricultural real estate 108,349 9,892 118,241 Consumer 53,931 533 54,464 Agricultural 92,555 6,527 99,082 Total $ 2,356,577 $ 54,894 $ 2,411,471 December 31, 2017 Unclassified Classified Total Commercial real estate $ 971,458 $ 16,203 $ 987,661 Commercial and industrial 486,150 21,369 507,519 Residential real estate 370,151 6,554 376,705 Agricultural real estate 77,084 9,402 86,486 Consumer 48,777 584 49,361 Agricultural 88,261 7,286 95,547 Total $ 2,041,881 $ 61,398 $ 2,103,279
Schedule of Recorded Investments in Purchase Credit Impaired Loans	The table below lists recorded investments in purchase credit impaired loans as of June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Contractually required principal payments $ 43,601 $ 41,349 Discount (12,165 ) (12,492 ) Recorded investment $ 31,436 $ 28,857

DERIVATIVE FINANCIAL INSTRUME25

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Summary of Notional Balance and Fair Values of Derivatives Outstanding	The following table shows the notional balances and fair values (including net accrued interest) of the derivatives outstanding by derivative type at June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Notional Amount Derivative Assets Derivative Liabilities Notional Amount Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate swaps $ 18,119 $ 538 $ — $ 17,231 $ — $ 46 Total derivatives designated as hedging relationships 18,119 538 — 17,231 — 46 Derivatives not designated as hedging instruments: Interest rate caps/floors 2,445 1 — 2,574 1 — Total derivatives not designated as hedging instruments 2,445 1 — 2,574 1 — Total $ 20,564 539 — $ 19,805 1 46 Cash collateral — — — (210 ) Netting adjustments — — 164 164 Net amount presented in Balance Sheet $ 539 $ — $ 165 $ —
Summary of Net Gains/ (Losses) on Derivatives and Hedging Activities	For the three-month and six-month periods ended June 30, 2018 and 2017, the Company recorded net gains/(losses) on derivatives and hedging activities: Three months ended Six months ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Derivatives designated as hedging instruments: Interest rate swaps $ — $ — $ — $ — Total net gain (loss) related to fair value hedge ineffectiveness — — — — Derivatives not designated as hedging instruments: Economic hedges: Interest rate caps/floors — — — (1 ) Total net gains (losses) related to derivatives not designated as hedging instruments — — — (1 ) Net gains (losses) on derivatives and hedging activities $ — $ — $ — $ (1 )
Summary of Recorded Net Gains (Losses) on Derivatives and Related Hedged Items in Fair Value Hedging Relationships	The following table shows the recorded net gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Company’s net interest income for the three-month periods ended June 30, 2018 and 2017. June 30, 2018 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ 155 $ (155 ) $ — $ (14 ) Total $ 155 $ (155 ) $ — $ (14 ) June 30, 2017 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ (162 ) $ 162 $ — $ (37 ) Total $ (162 ) $ 162 $ — $ (37 ) The following table shows the recorded net gains (losses) on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Company’s net interest income for the six-month periods ended June 30, 2018 and 2017. June 30, 2018 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ 584 $ (584 ) $ — $ (38 ) Total $ 584 $ (584 ) $ — $ (38 ) June 30, 2017 Gain/(Loss) on Derivatives Gain/(Loss) on Hedged Items Net Fair Value Hedge Ineffectiveness Effect of Derivatives on Net Interest Income Commercial real estate loans $ (93 ) $ 93 $ — $ (84 ) Total $ (93 ) $ 93 $ — $ (84 )

BORROWINGS (Tables)

BORROWINGS (Tables)	6 Months Ended
	Jun. 30, 2018
Schedule of Federal Funds Purchased and Retail Repurchase Agreements	Federal funds purchased and retail repurchase agreements as of June 30, 2018 and December 31, 2017 are listed below. June 30, 2018 December 31, 2017 Federal funds purchased $ — $ — Retail repurchase agreements 41,394 37,492
Average Daily Balance and Interest Rate of Federal Funds Purchased and Retail Repurchase Agreements	June 30, 2018 December 31, 2017 Year-to-date average daily balance during the period $ 41,391 $ 25,823 Maximum month-end balance year-to-date $ 42,101 $ 43,843 Weighted average interest rate at period-end 0.24 % 0.23 %
Summary of Federal Home Loan Bank Advances	Federal Home Loan Bank advances as of June 30, 2018, and December 31, 2017, are listed below. June 30, 2018 December 31, 2017 Federal Home Loan Bank line of credit advances $ 557,619 $ 347,692 Federal Home Loan Bank fixed rate term advances — — Total Federal Home Loan Bank advances $ 557,619 $ 347,692
Bank Stock Loan [Member]
Summary of Future Principal Repayments	Future principal repayments of the June 30, 2018 outstanding balances are as follows: Due in one year or less $ 1,850 Due after one year through two years 1,850 Due after two years through three years 1,850 Due after three years through four years 1,850 Due after four years through five years 2,975 Thereafter 8,000 Total $ 18,375

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Summary of Shares Issued and Held in Treasury or Outstanding	The following table presents shares that were issued and were held in treasury or were outstanding at June 30, 2018 and December 31, 2017. June 30, 2018 December 31, 2017 Class A common stock – issued 17,051,820 15,876,650 Class A common stock – held in treasury (1,271,043 ) (1,271,043 ) Class A common stock – outstanding 15,780,777 14,605,607 Class B common stock – issued 234,903 234,903 Class B common stock – held in treasury (234,903 ) (234,903 ) Class B common stock – outstanding — —
Components of Accumulated Other Comprehensive Income	Components of accumulated other comprehensive income as of June 30, 2018 and December 31, 2017, are listed below. Available-for- Sale Securities Held-to- Maturity Securities Accumulated Other Comprehensive Income June 30, 2018 Net unrealized or unamortized gains (losses) $ (5,919 ) $ (2,110 ) $ (8,029 ) Tax effect 1,500 535 2,035 $ (4,419 ) $ (1,575 ) $ (5,994 ) December 31, 2017 Net unrealized or unamortized gains (losses) $ (1,797 ) $ (2,344 ) $ (4,141 ) Tax effect 455 594 1,049 $ (1,342 ) $ (1,750 ) $ (3,092 )

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	6 Months Ended
	Jun. 30, 2018
Banking And Thrift [Abstract]
Summary of Company's and Equity Bank's Capital Amounts and Ratios	The Company’s and Equity Bank’s capital amounts and ratios at June 30, 2018 and December 31, 2017 are presented in the table below. Ratios provided for Equity Bancshares, Inc. represent the ratios of the Company on a consolidated basis. Actual Minimum Required for Capital Adequacy Under Basel III Phase-In Minimum Required for Capital Adequacy Under Basel III Fully Phased-In To Be Well Capitalized Under Prompt Corrective Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio June 30, 2018 Total capital to risk weighted assets Equity Bancshares, Inc. $ 322,919 12.03 % $ 265,134 9.88 % $ 281,915 10.50 % $ N/A N/A Equity Bank 321,821 11.99 % 265,130 9.88 % 281,911 10.50 % 268,486 10.00 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 312,836 11.65 % 211,436 7.88 % 228,217 8.50 % N/A N/A Equity Bank 311,738 11.61 % 211,433 7.88 % 228,213 8.50 % 214,789 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 298,723 11.13 % 171,163 6.38 % 187,943 7.00 % N/A N/A Equity Bank 311,738 11.61 % 171,160 6.38 % 187,940 7.00 % 174,516 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 312,836 9.36 % 133,627 4.00 % 133,627 4.00 % N/A N/A Equity Bank 311,738 9.33 % 133,642 4.00 % 133,642 4.00 % 167,052 5.00 % December 31, 2017 Total capital to risk weighted assets Equity Bancshares, Inc. $ 288,353 12.54 % $ 212,705 9.25 % $ 241,449 10.50 % $ N/A N/A Equity Bank 279,712 12.17 % 212,682 9.25 % 241,423 10.50 % 229,927 10.0 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 279,855 12.17 % 166,715 7.25 % 195,459 8.50 % N/A N/A Equity Bank 271,214 11.80 % 166,697 7.25 % 195,438 8.50 % 183,942 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 265,887 11.56 % 132,222 5.75 % 160,966 7.00 % N/A N/A Equity Bank 271,214 11.80 % 132,208 5.75 % 160,949 7.00 % 149,452 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 279,855 10.33 % 108,372 4.00 % 108,372 4.00 % N/A N/A Equity Bank 271,214 10.01 % 108,351 4.00 % 108,351 4.00 % 135,439 5.00 %

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Summary of Earnings Per Share	The following table presents earnings per share for the three and six months ended June 30, 2018 and 2017. Three months ended Six months ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Basic: Net income allocable to common stockholders $ 6,867 $ 6,354 $ 15,578 $ 11,218 Weighted average common shares outstanding 15,353,421 12,203,252 14,982,077 12,009,238 Weighted average vested restricted stock units 11,230 1,843 8,019 1,300 Weighted average shares 15,364,651 12,205,095 14,990,096 12,010,538 Basic earnings per common share $ 0.45 $ 0.52 $ 1.04 $ 0.93 Diluted: Net income allocable to common stockholders $ 6,867 $ 6,354 $ 15,578 $ 11,218 Weighted average common shares outstanding for: Basic earnings per common share 15,364,651 12,205,095 14,990,096 12,010,538 Dilutive effects of the assumed exercise of stock options 304,999 237,267 292,165 251,785 Dilutive effects of the assumed vesting of restricted stock units 20,461 2,497 12,126 1,833 Average shares and dilutive potential common shares 15,690,111 12,444,859 15,294,387 12,264,156 Diluted earnings per common share $ 0.44 $ 0.51 $ 1.02 $ 0.91

FAIR VALUE (Tables)

FAIR VALUE (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized in the following table. June 30, 2018 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: Residential mortgage-backed securities (issued by government-sponsored entities) $ — $ 180,238 $ — Derivative assets: Derivative assets (included in other assets) — 539 — Cash collateral held by counterparty — — — Total derivative assets — 539 — Total assets $ — $ 180,777 $ — December 31, 2017 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: Residential mortgage-backed securities (issued by government-sponsored entities) $ — $ 161,591 $ — State and political subdivisions — 195 — Equity securities 486 — — Derivative assets: Derivative assets (included in other assets) — 1 — Cash collateral held by counterparty 164 — — Total derivative assets 164 1 — Total assets $ 650 $ 161,787 $ — Liabilities: Derivative liabilities: Interest rate swaps (included in other liabilities) $ — $ 46 $ — Cash collateral held by counterparty (46 ) — — Total derivative liabilities (46 ) 46 — Total liabilities $ (46 ) $ 46 $ —
Summary of Assets Measured at Fair Value on Non-recurring Basis	Assets measured at fair value on a non-recurring basis are summarized below. June 30, 2018 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 431 Commercial and industrial — — 381 Residential real estate — — 3,848 Agricultural real estate — — 255 Other — — 601 Other real estate owned: Commercial real estate — — 1,604 Residential real estate — — 131 December 31, 2017 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 1,439 Commercial and industrial — — 1,005 Residential real estate — — 4,021 Agricultural real estate — — 905 Other — — 1,910 Other real estate owned: Commercial real estate — — 1,018 Residential real estate — — 157
Summary of Additional Information about Unobservable Inputs Used in Fair Value Measurement	The following table presents additional information about the unobservable inputs used in the fair value measurement of financial assets measured on a nonrecurring basis that were categorized with Level 3 of the fair value hierarchy: Fair Value Valuation Technique Unobservable Input Range (weighted June 30, 2018 Impaired loans $ 5,516 Sales Approach Adjustments for differences comparable sales 15%-26% (5%) December 31, 2017 Impaired loans $ 9,280 Sales Approach Adjustments for differences comparable sales 15%-26% (5%)
Carrying Amount and Estimated Fair Values of Financial Instrument	Carrying amount and estimated fair values of financial instruments at period end were as follows as of the date indicated: June 30, 2018 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 47,691 $ 47,691 $ 47,691 $ — $ — Interest bearing deposits 6,991 6,991 — 6,991 — Available-for-sale securities 180,238 180,238 — 180,238 — Held-to-maturity securities 665,995 653,012 — 653,012 — Loans held for sale 43,875 43,875 — 43,875 — Loans, net of allowance for loan losses 2,401,388 2,406,148 — — 2,406,148 Federal Reserve Bank and Federal Home Loan Bank stock 35,681 N/A N/A N/A N/A Interest receivable 14,343 14,343 — 14,343 — Derivative assets 539 539 — 539 — Cash collateral held by derivative counterparty — — — — — Total derivative assets 539 539 — 539 — Total assets $ 3,396,741 $ 3,352,837 $ 47,691 $ 898,998 $ 2,406,148 Financial liabilities: Deposits $ 2,635,048 $ 2,636,114 $ — $ 2,636,114 $ — Federal funds purchased and retail repurchase agreements 41,394 41,394 — 41,394 — Federal Home Loan Bank advances 557,619 557,619 — 557,619 — Bank stock loan 18,375 18,375 — 18,375 — Subordinated debentures 14,113 14,113 — 14,113 — Contractual obligations 1,734 1,734 — 1,734 — Interest payable 2,686 2,686 — 2,686 — Total liabilities $ 3,270,969 $ 3,272,035 $ — $ 3,272,035 $ — December 31, 2017 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 52,195 $ 52,195 $ 52,195 $ — $ — Interest bearing deposits 3,496 3,496 — 3,496 — Available-for-sale securities 162,272 162,272 486 161,786 — Held-to-maturity securities 535,462 532,744 — 532,744 — Loans held for sale 16,344 16,344 — 16,344 — Loans, net of allowance for loan losses 2,094,781 2,098,431 — — 2,098,431 Federal Reserve Bank and Federal Home Loan Bank stock 24,373 N/A N/A N/A N/A Interest receivable 12,371 12,371 — 12,371 — Derivative assets 1 1 — 1 — Cash collateral held by derivative counterparty 164 164 164 — — Total derivative assets 165 165 164 1 — Total assets $ 2,901,459 $ 2,878,018 $ 52,845 $ 726,742 $ 2,098,431 Financial liabilities: Deposits $ 2,382,013 $ 2,385,528 $ — $ 2,385,528 $ — Federal funds purchased and retail repurchase agreements 37,492 37,492 — 37,492 — Federal Home Loan Bank advances 347,692 347,692 — 347,692 — Bank stock loan 2,500 2,500 — 2,500 — Subordinated debentures 13,968 13,968 — 13,968 — Contractual obligations 1,967 1,967 — 1,967 — Interest payable 1,932 1,932 — 1,932 — Derivative liabilities 46 46 — 46 — Cash collateral held by derivative counterparty (46 ) (46 ) (46 ) — — Total derivative liabilities — — (46 ) 46 — Total liabilities $ 2,787,564 $ 2,791,079 $ (46 ) $ 2,791,125 $ —

COMMITMENTS AND CREDIT RISK (Ta

COMMITMENTS AND CREDIT RISK (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Contractual Amounts of Commitments and Standby Letters of Credit to Originate Loans and Available Lines of Credit	The contractual amounts of commitments to originate loans and available lines of credit as of June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $ 32,667 $ 171,455 $ 38,031 $ 67,107 Mortgage loans in the process of origination 22,242 3,901 14,803 9,258 Unused lines of credit 94,429 161,038 87,948 141,026 June 30, 2018 December 31, 2017 Fixed Rate Variable Rate Fixed Rate Variable Rate Standby letters of credit $ 4,563 $ 2,620 $ 4,064 $ 3,830

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	6 Months Ended
	Jun. 30, 2018
Kansas Bank Corporation [Member]
Business Acquisition [Line Items]
Summary of the Consideration Paid and the Amounts of the Assets Acquired and Liabilities Assumed Recognized at the Acquisition Date	The following table summarizes the consideration paid for KBC and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date: Fair value of consideration: Common stock $ 32,103 Cash 14,918 $ 47,021 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and due from banks $ 27,899 Available-for-sale securities 22,820 Held-to-maturity securities 92,028 Federal Reserve Bank and Federal Home Loan Bank stock 475 Loans 159,898 Premises and equipment 5,835 Core deposit intangible 8,080 Other assets 5,482 Total assets acquired 322,517 Deposits 288,352 Interest payable and other liabilities 751 Total liabilities assumed 289,103 Total identifiable net assets 33,414 Goodwill 13,607 $ 47,021
Schedule Of Acquisitions By Acquisition At Acquisition Date	The following table presents information about the loans acquired in the KBC merger as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Contractually required principal $ 160,526 $ 5,066 Non-accretable difference (expected losses) — (2,305 ) Cash flows expected to be collected 160,526 2,761 Accretable yield (3,389 ) — Fair value of acquired loans $ 157,137 $ 2,761
Schedule Of Carrying Amounts Of Purchased Loans At Acquisition	The following table presents the carrying value of the loans acquired in the KBC acquisition by class, as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Total Commercial real estate $ 94,924 $ 1,975 $ 96,899 Commercial and industrial 18,848 622 19,470 Residential real estate 2,898 - 2,898 Agricultural real estate 22,532 - 22,532 Consumer 3,539 - 3,539 Agricultural 14,396 164 14,560 Fair value of acquired loans $ 157,137 $ 2,761 $ 159,898
Adams Dairy Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Summary of the Consideration Paid and the Amounts of the Assets Acquired and Liabilities Assumed Recognized at the Acquisition Date	The following table summarizes the consideration paid for ADBI and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date: Fair value of consideration: Common stock $ 13,456 Cash 3,960 $ 17,416 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and due from banks $ 2,812 Interest bearing time deposits in other banks 4,237 Available-for-sale securities 10,677 Held-to-maturity securities 335 Federal Reserve Bank and Federal Home Loan Bank stock 194 Loans 82,716 Premises and equipment 4,485 Bank-owned life insurance 2,869 Core deposit intangible 1,990 Other assets 1,042 Total assets acquired 111,357 Deposits 97,124 Federal Home Loan Bank advances 1,000 Interest payable and other liabilities 4,282 Total liabilities assumed 102,406 Total identifiable net assets 8,951 Goodwill 8,465 $ 17,416
Schedule Of Acquisitions By Acquisition At Acquisition Date	The following table presents information about the loans acquired in the ADBI merger as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Contractually required principal $ 84,225 $ 1,477 Non-accretable difference (expected losses) — (238 ) Cash flows expected to be collected 84,225 1,239 Accretable yield (2,748 ) — Fair value of acquired loans $ 81,477 $ 1,239
Schedule Of Carrying Amounts Of Purchased Loans At Acquisition	The following table presents the carrying value of the loans acquired in the ADBI acquisition by class, as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Total Commercial real estate $ 74,657 $ 820 $ 75,477 Commercial and industrial 1,002 419 1,421 Residential real estate 4,955 - 4,955 Consumer 863 - 863 Fair value of acquired loans $ 81,477 $ 1,239 $ 82,716

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 01, 2018	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Federal Statutory Income Tax Rate			21.00%	35.00%
Unrealized gain or loss on available-for-sale equity securities	$ 11
Tax Cuts and Jobs Act of 2017, Re-measured net deferred tax assets		$ 1,086	$ 1,086
Tax Cuts and Jobs Act of 2017, Re-measured net deferred tax assets relating to unrealized losses on securities		535	535
Tax Cuts and Jobs Act of 2017, Stranded Tax Effect			535
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings			535
Other [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Recovery on zero-basis purchased loans, income from equity method investments		36	95
Accounting Standards Update 2014-09 [Member] | Other [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Investment referral income, insurance sales commissions and other non-interest income related to loans and deposits		$ 487	$ 889

Basis of Presentation - Summary

Basis of Presentation - Summary of Company's Source of Non-interest Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Non-interest income
Service charges and fees	$ 1,729	$ 1,267	$ 3,309	$ 2,449
Debit card income	1,522	1,205	2,775	2,210
Mortgage banking	312	540	625	1,025
Increase in bank-owned life insurance	508	354	1,160	709
Net gain (loss) from securities transactions	(2)	83	(10)	96
Other	523	513	984	812
Total non-interest income	4,592	3,962	8,843	7,301
Accounting Standards Update 2014-09 [Member]
Non-interest income
Service charges and fees	1,729	1,224	3,309	2,449
Debit card income	1,522	1,205	2,775	2,210
Mortgage banking	312	540	625	1,025
Increase in bank-owned life insurance	508	354	1,160	709
Net gain (loss) from securities transactions	(2)	83	(10)	96
Other	523	556	984	812
Total non-interest income	$ 4,592	$ 3,962	$ 8,843	$ 7,301

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities Available-for-Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	$ 186,157	$ 164,069
Available-for-Sale, Gross Unrealized Gains		36
Available-for-Sale, Gross Unrealized Losses	(5,919)	(1,833)
Available-for-Sale, Fair Value	180,238	162,272
Residential Mortgage-Backed Securities (Issued by Government-Sponsored Entities) [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	186,157	163,374
Available-for-Sale, Gross Unrealized Gains		36
Available-for-Sale, Gross Unrealized Losses	(5,919)	(1,819)
Available-for-Sale, Fair Value	$ 180,238	161,591
State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost		195
Available-for-Sale, Fair Value		195
Equity Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost		500
Available-for-Sale, Gross Unrealized Losses		(14)
Available-for-Sale, Fair Value		$ 486

Securities - Amortized Cost a36

Securities - Amortized Cost and Fair Value of Securities Held-to-Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	$ 665,995	$ 535,462
Held-to-Maturity, Gross Unrecognized Gains	1,363	2,622
Held-to-Maturity, Gross Unrecognized Losses	(14,346)	(5,340)
Held-to-Maturity, Fair Value	653,012	532,744
U.S. Government Sponsored Entities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	5,358	998
Held-to-Maturity, Gross Unrecognized Losses	(24)	(13)
Held-to-Maturity, Fair Value	5,334	985
Residential Mortgage-Backed Securities (Issued by Government-Sponsored Entities) [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	481,294	383,875
Held-to-Maturity, Gross Unrecognized Gains	255	573
Held-to-Maturity, Gross Unrecognized Losses	(12,521)	(4,866)
Held-to-Maturity, Fair Value	469,028	379,582
Corporate [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	22,993	22,991
Held-to-Maturity, Gross Unrecognized Gains	372	355
Held-to-Maturity, Gross Unrecognized Losses	(35)
Held-to-Maturity, Fair Value	23,330	23,346
Small Business Administration Loan Pools [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	1,884	2,048
Held-to-Maturity, Gross Unrecognized Losses	(34)	(14)
Held-to-Maturity, Fair Value	1,850	2,034
State and Political Subdivisions [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	154,466	125,550
Held-to-Maturity, Gross Unrecognized Gains	736	1,694
Held-to-Maturity, Gross Unrecognized Losses	(1,732)	(447)
Held-to-Maturity, Fair Value	$ 153,470	$ 126,797

Securities - Fair Value and Amo

Securities - Fair Value and Amortized Cost of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
Available-for-Sale, Amortized Cost, Mortgage-backed securities	$ 186,157
Available-for-Sale, Amortized Cost, Total debt securities	186,157
Available-for-Sale, Fair Value, Mortgage-backed securities	180,238
Available-for-Sale, Fair Value, Total debt securities	180,238
Held-to-Maturity, Amortized Cost, Within one year	5,055
Held-to-Maturity, Amortized Cost, One to five years	35,190
Held-to-Maturity, Amortized Cost, Five to ten years	56,830
Held-to-Maturity, Amortized Cost, After ten years	87,626
Held-to-Maturity, Amortized Cost, Mortgage-backed securities	481,294
Held-to-Maturity, Amortized Cost	665,995	$ 535,462
Held-to-Maturity, Fair Value, Within one year	5,057
Held-to-Maturity, Fair Value, One to five years	35,342
Held-to-Maturity, Fair Value, Five to ten years	57,288
Held-to-Maturity, Fair Value, After ten years	86,297
Held-to-Maturity, Fair Value, Mortgage-backed securities	469,028
Held-to-Maturity, Fair Value, Total debt securities	$ 653,012	$ 532,744

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	Jun. 30, 2018USD ($)Security	Dec. 31, 2017USD ($)
Investments Debt And Equity Securities [Abstract]
Carrying value of securities pledged as collateral | $	$ 658,527	$ 570,146
Number of unrealized loss position, available-for-sale securities	38
Number of unrealized loss position, held-to-maturity securities	446

Securities - Summary of Gross U

Securities - Summary of Gross Unrealized Losses and Fair Value of Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Fair Value	$ 127,047	$ 78,884
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Unrealized Loss	(3,265)	(437)
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Fair Value	52,954	59,026
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Unrealized Loss	(2,654)	(1,396)
Total temporarily impaired securities, Available-for-sale securities, Fair Value	180,001	137,910
Total temporarily impaired securities, Available-for-sale securities, Unrealized Loss	(5,919)	(1,833)
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	258,298	175,619
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(5,738)	(1,403)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	209,817	226,719
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(10,499)	(5,520)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	468,115	402,338
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(16,237)	(6,923)
Residential Mortgage-Backed Securities (Issued by Government-Sponsored Entities) [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Fair Value	127,047	78,884
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Unrealized Loss	(3,265)	(437)
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Fair Value	52,954	58,540
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Unrealized Loss	(2,654)	(1,382)
Total temporarily impaired securities, Available-for-sale securities, Fair Value	180,001	137,424
Total temporarily impaired securities, Available-for-sale securities, Unrealized Loss	(5,919)	(1,819)
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	185,445	147,281
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(4,663)	(1,263)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	181,293	198,239
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(9,301)	(5,030)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	366,738	345,520
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(13,964)	(6,293)
Equity Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Fair Value		486
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Unrealized Loss		(14)
Total temporarily impaired securities, Available-for-sale securities, Fair Value		486
Total temporarily impaired securities, Available-for-sale securities, Unrealized Loss		(14)
U.S. Government Sponsored Entities [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	2,374
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(1)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	975	985
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(23)	(13)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	3,349	985
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(24)	(13)
Corporate [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	5,166	5,312
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(114)	(16)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	5,166	5,312
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(114)	(16)
Small Business Administration Loan Pools [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	846	926
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(16)	(1)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	1,004	1,108
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(40)	(38)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	1,850	2,034
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(56)	(39)
State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	64,467	22,100
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(944)	(123)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	26,545	26,387
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(1,135)	(439)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	91,012	48,487
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	$ (2,079)	$ (562)

Securities - Proceeds from Sale

Securities - Proceeds from Sales and Associated Gains and Losses Reclassified from Other comprehensive Income to Income (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Investments Debt And Equity Securities [Abstract]
Proceeds	$ 3,083	$ 6,522
Gross gains	83	96
Income tax expense on net realized gains	$ 32	$ 37

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses - Categories of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 2,411,471		$ 2,103,279
Allowance for loan losses	(10,083)	$ (9,316)	(8,498)	$ (7,568)	$ (7,048)	$ (6,432)
Net loans	2,401,388		2,094,781
Commercial Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,226,397		987,661
Allowance for loan losses	(3,495)	(3,010)	(2,740)	(2,724)	(2,592)	(2,420)
Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	503,716		507,519
Allowance for loan losses	(2,254)	(2,388)	(2,136)	(2,070)	(2,059)	(1,881)
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	409,571		376,705
Allowance for loan losses	(2,663)	(2,442)	(2,262)	(1,999)	(1,875)	(1,765)
Agricultural Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	118,241		86,486
Allowance for loan losses	(334)	(267)	(319)	(109)	(66)	(35)
Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	54,464		49,361
Allowance for loan losses	(983)	(878)	(768)	(522)	(391)	(266)
Agricultural [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	99,082		95,547
Allowance for loan losses	$ (354)	$ (331)	$ (273)	$ (144)	$ (65)	$ (65)

Loans and Allowance for Loan 42

Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)Loan	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)Loan
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 2,401,388		$ 2,401,388		$ 2,094,781
Unamortized balance of merger purchase accounting adjustments	11,070		11,070		$ 6,842
Provision for loan losses	750	$ 628	$ 1,920	$ 1,723
Troubled debt restructurings | Loan			0		0
Consumer Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Over-draft deposit accounts	1,367		$ 1,367		$ 741
Purchased Credit Impaired Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Accretable yield	2,537		2,537		1,980
Interest income recognized	813	699	1,378	1,412
Provision for loan losses	25	8	(146)	61
Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Mortgage finance loans amount			10,000		10,000
Loans purchased at discount	895,686		895,686		796,064
Provision for loan losses	(64)	$ 397	196	$ 585
Residential Real Estate Loan Pools [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 74,944		$ 74,944		$ 85,868

Loans and Allowance for Loan 43

Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment Allowance (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	$ 9,316	$ 7,048	$ 8,498	$ 6,432
Provision for loan losses	750	628	1,920	1,723
Loans charged-off	(512)	(710)	(1,018)	(1,397)
Recoveries	529	602	683	810
Allowance for Loan Losses, Ending Balance	10,083	7,568	10,083	7,568
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	3,010	2,592	2,740	2,420
Provision for loan losses	216	(245)	507	(78)
Loans charged-off		(29)	(29)	(92)
Recoveries	269	406	277	474
Allowance for Loan Losses, Ending Balance	3,495	2,724	3,495	2,724
Commercial and Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	2,388	2,059	2,136	1,881
Provision for loan losses	(64)	397	196	585
Loans charged-off	(77)	(409)	(86)	(422)
Recoveries	7	23	8	26
Allowance for Loan Losses, Ending Balance	2,254	2,070	2,254	2,070
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	2,442	1,875	2,262	1,765
Provision for loan losses	185	58	475	374
Loans charged-off	(148)	(27)	(271)	(238)
Recoveries	184	93	197	98
Allowance for Loan Losses, Ending Balance	2,663	1,999	2,663	1,999
Agricultural Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	267	66	319	35
Provision for loan losses	147	46	92	77
Loans charged-off	(80)	(3)	(80)	(3)
Recoveries			3
Allowance for Loan Losses, Ending Balance	334	109	334	109
Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	878	391	768	266
Provision for loan losses	247	298	535	650
Loans charged-off	(203)	(242)	(509)	(601)
Recoveries	61	75	189	207
Allowance for Loan Losses, Ending Balance	983	522	983	522
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	331	65	273	65
Provision for loan losses	19	74	115	115
Loans charged-off	(4)		(43)	(41)
Recoveries	8	5	9	5
Allowance for Loan Losses, Ending Balance	$ 354	$ 144	$ 354	$ 144

Loans and Allowance for Loan 44

Loans and Allowance for Loan Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	$ 552		$ 741
Collectively evaluated for impairment, Allowance for loan losses	9,483		7,563
Purchase credit impaired loans, Allowance for loan losses	48		194
Total Allowance for Loan Losses	10,083	$ 9,316	8,498	$ 7,568	$ 7,048	$ 6,432
Individually evaluated for impairment	15,421		17,582
Collectively evaluated for impairment	2,364,614		2,056,840
Purchase credit impaired loans	31,436		28,857
Total Loans	2,411,471		2,103,279
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	28		130
Collectively evaluated for impairment, Allowance for loan losses	3,460		2,582
Purchase credit impaired loans, Allowance for loan losses	7		28
Total Allowance for Loan Losses	3,495	3,010	2,740	2,724	2,592	2,420
Individually evaluated for impairment	2,029		2,728
Collectively evaluated for impairment	1,209,070		971,376
Purchase credit impaired loans	15,298		13,557
Total Loans	1,226,397		987,661
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	27		87
Collectively evaluated for impairment, Allowance for loan losses	2,212		2,028
Purchase credit impaired loans, Allowance for loan losses	15		21
Total Allowance for Loan Losses	2,254	2,388	2,136	2,070	2,059	1,881
Individually evaluated for impairment	5,242		7,886
Collectively evaluated for impairment	491,874		493,903
Purchase credit impaired loans	6,600		5,730
Total Loans	503,716		507,519
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	411		386
Collectively evaluated for impairment, Allowance for loan losses	2,235		1,815
Purchase credit impaired loans, Allowance for loan losses	17		61
Total Allowance for Loan Losses	2,663	2,442	2,262	1,999	1,875	1,765
Individually evaluated for impairment	4,851		4,829
Collectively evaluated for impairment	402,324		369,471
Purchase credit impaired loans	2,396		2,405
Total Loans	409,571		376,705
Agricultural Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	25		46
Collectively evaluated for impairment, Allowance for loan losses	306		190
Purchase credit impaired loans, Allowance for loan losses	3		83
Total Allowance for Loan Losses	334	267	319	109	66	35
Individually evaluated for impairment	2,496		533
Collectively evaluated for impairment	110,974		82,493
Purchase credit impaired loans	4,771		3,460
Total Loans	118,241		86,486
Consumer [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	49		56
Collectively evaluated for impairment, Allowance for loan losses	934		712
Purchase credit impaired loans, Allowance for loan losses	0		0
Total Allowance for Loan Losses	983	878	768	522	391	266
Individually evaluated for impairment	523		556
Collectively evaluated for impairment	53,936		48,802
Purchase credit impaired loans	5		3
Total Loans	54,464		49,361
Agricultural [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	12		36
Collectively evaluated for impairment, Allowance for loan losses	336		236
Purchase credit impaired loans, Allowance for loan losses	6		1
Total Allowance for Loan Losses	354	$ 331	273	$ 144	$ 65	$ 65
Individually evaluated for impairment	280		1,050
Collectively evaluated for impairment	96,436		90,795
Purchase credit impaired loans	2,366		3,702
Total Loans	$ 99,082		$ 95,547

Loans and Allowance for Loan 45

Loans and Allowance for Loan Losses - Impaired Loans, Segregated by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	$ 11,184		$ 11,184		$ 11,847
With no related allowance recorded, Recorded Investment	9,779		9,779		10,615
With an allowance recorded, Unpaid Principal Balance	6,733		6,733		13,968
With an allowance recorded, Recorded Investment	6,116		6,116		10,215
Allowance for Loan Losses Allocated	600		600		935
Unpaid Principal Balance	17,917		17,917		25,815
Recorded Investment	15,895		15,895		20,830
With no related allowance recorded, Average Recorded Investment	10,039	$ 2,501	10,231	$ 2,665
With no related allowance recorded, Interest Income Recognized	212	13	224	23
With an allowance recorded, Average Recorded Investment	5,957	7,222	7,376	6,500
With an allowance recorded, Interest Income Recognized	32	22	33	27
Average Recorded Investment	15,996	9,723	17,607	9,165
Interest Income Recognized	244	35	257	50
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	1,690		1,690		1,878
With no related allowance recorded, Recorded Investment	1,629		1,629		1,567
With an allowance recorded, Unpaid Principal Balance	628		628		4,049
With an allowance recorded, Recorded Investment	466		466		1,597
Allowance for Loan Losses Allocated	35		35		158
With no related allowance recorded, Average Recorded Investment	1,773	1,099	1,704	841
With no related allowance recorded, Interest Income Recognized	118		118	7
With an allowance recorded, Average Recorded Investment	665	2,229	975	2,195
With an allowance recorded, Interest Income Recognized	1	7	2	9
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	6,271		6,271		8,679
With no related allowance recorded, Recorded Investment	4,970		4,970		8,020
With an allowance recorded, Unpaid Principal Balance	511		511		1,310
With an allowance recorded, Recorded Investment	423		423		1,113
Allowance for Loan Losses Allocated	42		42		108
With no related allowance recorded, Average Recorded Investment	6,186	1,034	6,797	667
With no related allowance recorded, Interest Income Recognized	56		66	3
With an allowance recorded, Average Recorded Investment	514	558	714	378
With an allowance recorded, Interest Income Recognized				1
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	747		747		1,230
With no related allowance recorded, Recorded Investment	742		742		969
With an allowance recorded, Unpaid Principal Balance	4,492		4,492		4,868
With an allowance recorded, Recorded Investment	4,276		4,276		4,468
Allowance for Loan Losses Allocated	428		428		447
With no related allowance recorded, Average Recorded Investment	565	330	700	688
With no related allowance recorded, Interest Income Recognized	9	1	10	1
With an allowance recorded, Average Recorded Investment	3,774	3,563	4,005	3,207
With an allowance recorded, Interest Income Recognized	22	13	22	15
Agricultural Real Estate [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	2,273		2,273		52
With no related allowance recorded, Recorded Investment	2,242		2,242		52
With an allowance recorded, Unpaid Principal Balance	300		300		1,266
With an allowance recorded, Recorded Investment	283		283		1,034
Allowance for Loan Losses Allocated	28		28		129
With no related allowance recorded, Average Recorded Investment	1,189	31	810	437
With no related allowance recorded, Interest Income Recognized	11	12	12	12
With an allowance recorded, Average Recorded Investment	313	339	553	211
With an allowance recorded, Interest Income Recognized	2		2
Consumer [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	41		41		1
With no related allowance recorded, Recorded Investment	38		38
With an allowance recorded, Unpaid Principal Balance	592		592		677
With an allowance recorded, Recorded Investment	486		486		559
Allowance for Loan Losses Allocated	49		49		56
With no related allowance recorded, Average Recorded Investment	19		13	26
With an allowance recorded, Average Recorded Investment	473	383	502	368
With an allowance recorded, Interest Income Recognized	3	2	3	2
Agricultural [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	162		162		7
With no related allowance recorded, Recorded Investment	158		158		7
With an allowance recorded, Unpaid Principal Balance	210		210		1,798
With an allowance recorded, Recorded Investment	182		182		1,444
Allowance for Loan Losses Allocated	18		18		$ 37
With no related allowance recorded, Average Recorded Investment	307	7	207	6
With no related allowance recorded, Interest Income Recognized	18		18
With an allowance recorded, Average Recorded Investment	218	$ 150	627	$ 141
With an allowance recorded, Interest Income Recognized	$ 4		$ 4

Loans and Allowance for Loan 46

Loans and Allowance for Loan Losses - Schedule of Aging of Recorded Investment in Past Due Loans by Segment and Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Greater Than 90 Days Past Due Still On Accrual	$ 302
Nonaccrual	37,948	$ 40,276
Loans Not Past Due	2,368,310	2,057,798
Total Loans	2,411,471	2,103,279
30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	3,068	3,889
60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	1,843	1,316
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	12,603	11,607
Loans Not Past Due	1,211,731	974,748
Total Loans	1,226,397	987,661
Commercial Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	1,762	1,284
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	301	22
Commercial and Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Greater Than 90 Days Past Due Still On Accrual	302
Nonaccrual	11,114	13,217
Loans Not Past Due	491,338	494,045
Total Loans	503,716	507,519
Commercial and Industrial [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	208	251
Commercial and Industrial [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	754	6
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	5,371	6,148
Loans Not Past Due	402,863	367,924
Total Loans	409,571	376,705
Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	710	1,457
Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	627	1,176
Agricultural Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	5,690	3,993
Loans Not Past Due	112,551	82,370
Total Loans	118,241	86,486
Agricultural Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due		123
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	524	559
Loans Not Past Due	53,542	48,331
Total Loans	54,464	49,361
Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	336	359
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	62	112
Agricultural [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	2,646	4,752
Loans Not Past Due	96,285	90,380
Total Loans	99,082	95,547
Agricultural [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	52	$ 415
Agricultural [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	$ 99

Loans and Allowance for Loan 47

Loans and Allowance for Loan Losses - Schedule of Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 2,411,471	$ 2,103,279
Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	2,356,577	2,041,881
Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	54,894	61,398
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,226,397	987,661
Commercial Real Estate [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,211,285	971,458
Commercial Real Estate [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	15,112	16,203
Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	503,716	507,519
Commercial and Industrial [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	486,469	486,150
Commercial and Industrial [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	17,247	21,369
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	409,571	376,705
Residential Real Estate [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	403,988	370,151
Residential Real Estate [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,583	6,554
Agricultural Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	118,241	86,486
Agricultural Real Estate [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	108,349	77,084
Agricultural Real Estate [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	9,892	9,402
Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	54,464	49,361
Consumer [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	53,931	48,777
Consumer [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	533	584
Agricultural [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	99,082	95,547
Agricultural [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	92,555	88,261
Agricultural [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 6,527	$ 7,286

Loans and Allowance for Loan 48

Loans and Allowance for Loan Losses - Schedule of Recorded Investments in Purchase Credit Impaired Loans (Detail) - Purchased Credit Impaired Loans [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period [Line Items]
Contractually required principal payments	$ 43,601	$ 41,349
Discount	(12,165)	(12,492)
Recorded investment	$ 31,436	$ 28,857

Derivative Financial Instrume49

Derivative Financial Instruments - Additional Information (Detail)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, cap interest rate	4.50%	4.50%
Interest Rate Swaps [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative [Line Items]
Weighted average maturity period	8 years 1 month 6 days	8 years 8 months 12 days
Weighted average pay rate	4.96%	4.94%
Weighted average receive rate	4.72%	4.13%
Interest Rate Caps [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Weighted average maturity period	1 year 4 months 24 days		1 year 10 months 24 days

Derivative Financial Instrume50

Derivative Financial Instruments - Summary of Notional Balance and Fair Values of Derivatives Outstanding (Detail) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,564,000	$ 19,805,000
Derivative Assets	539,000	1,000
Derivative Liabilities		46,000
Cash collateral, Derivative Assets		0
Cash collateral, Derivative Liabilities	0	(210,000)
Netting adjustments, Derivative Assets		164,000
Netting adjustments, Derivative Liabilities		164,000
Net amount presented in Balance Sheet, Derivative Assets	539,000	165,000
Net amount presented in Balance Sheet, Derivative Liabilities	0	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	18,119,000	17,231,000
Derivative Assets	538,000
Derivative Liabilities		46,000
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	18,119,000	17,231,000
Derivative Assets	538,000
Derivative Liabilities		46,000
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	2,445,000	2,574,000
Derivative Assets	1,000	1,000
Not Designated as Hedging Instrument [Member] | Interest Rate Caps/Floors [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	2,445,000	2,574,000
Derivative Assets	$ 1,000	$ 1,000

Derivative Financial Instrume51

Derivative Financial Instruments - Summary of Net Gains/ (Losses) on Derivatives and Hedging Activities (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Derivatives designated as hedging instruments:
Total net gain (loss) related to fair value hedge ineffectiveness	$ 0
Derivatives not designated as hedging instruments:
Total net gains (losses) related to derivatives not designated as hedging instruments	(1)
Net gains (losses) on derivatives and hedging activities	(1)
Interest Rate Swaps [Member]
Derivatives designated as hedging instruments:
Total net gain (loss) related to fair value hedge ineffectiveness	0
Interest Rate Caps/Floors [Member]
Derivatives not designated as hedging instruments:
Total net gains (losses) related to derivatives not designated as hedging instruments	$ (1)

Derivative Financial Instrume52

Derivative Financial Instruments - Summary of Recorded Net Gains (Losses) on Derivatives and Related Hedged Items in Fair Value Hedging Relationships (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Net Fair Value Hedge Ineffectiveness				$ 0
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	$ 155	$ (162)	$ 584	(93)
Gain/(Loss) on Hedged Items	(155)	162	(584)	93
Net Fair Value Hedge Ineffectiveness	0	0	0	0
Effect of Derivatives on Net Interest Income	(14)	(37)	(38)	(84)
Fair Value Hedging [Member] | Commercial Real Estate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	155	(162)	584	(93)
Gain/(Loss) on Hedged Items	(155)	162	(584)	93
Net Fair Value Hedge Ineffectiveness	0	0	0	0
Effect of Derivatives on Net Interest Income	$ (14)	$ (37)	$ (38)	$ (84)

Borrowings - Schedule of Federa

Borrowings - Schedule of Federal Funds Purchased and Retail Repurchase Agreements (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Federal Funds Purchased And Securities Sold Under Agreements To Repurchase [Abstract]
Federal funds purchased	$ 0	$ 0
Retail repurchase agreements	$ 41,394	$ 37,492

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)	Nov. 09, 2017	Mar. 13, 2017	Jun. 30, 2018	May 03, 2018	Dec. 31, 2017	Jan. 28, 2016
Debt Instrument [Line Items]
Drawing against Federal Home Loan Bank advances			$ 557,619,000		$ 347,692,000
Line of credit facility maximum borrowing capacity						$ 30,000,000
Debt Instrument, Maturity Date Range, Start			Mar. 11, 2019
Debt Instrument, Term		5 years
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.20%
Long term debt	$ 2,500,000
Debt instrument, maturity date	Jan. 2, 2023
Bank stock loan			$ 18,375,000		2,500,000
Bank stock loan, interest rate			5.00%
Debt Instrument, Maturity Date Range, End			Jul. 1, 2023
5.00% Maturity on January 2, 2023 [Member]
Debt Instrument [Line Items]
Bank stock loan			$ 2,375,000
Bank stock loan, interest rate			5.00%
4.50% Maturity on January 2, 2023 [Member]
Debt Instrument [Line Items]
Bank stock loan					$ 2,500,000
Bank stock loan, interest rate					4.50%
5.00% Maturity on July 1, 2023 [Member]
Debt Instrument [Line Items]
Bank stock loan				$ 16,000,000
Federal Home Loan Bank Line of Credit Advances [Member]
Debt Instrument [Line Items]
Drawing against Federal Home Loan Bank advances			$ 557,619,000		$ 347,692,000
Weighted average interest rate on drawings			2.11%		1.47%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity			$ 819,227,000		$ 478,966,000
Line of credit facility additional borrowing capacity			235,316,000		125,271,000
Residential Mortgage-Backed Securities (Issued by Government-Sponsored Entities) [Member]
Debt Instrument [Line Items]
Residential mortgage-backed securities, fair value			$ 43,740,000		$ 44,768,000

Borrowings - Schedule of Borrow

Borrowings - Schedule of Borrowing Usage and Interest Rate (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Year-to-date average daily balance during the period	$ 41,391	$ 25,823
Maximum month-end balance year-to-date	$ 42,101	$ 43,843
Weighted average interest rate at period-end	0.24%	0.23%

Borrowings - Summary of Federal

Borrowings - Summary of Federal Home Loan Bank Advances (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Federal Home Loan Bank Advances [Line Items]
Total Federal Home Loan Bank advances	$ 557,619	$ 347,692
Federal Home Loan Bank Line of Credit Advances [Member]
Federal Home Loan Bank Advances [Line Items]
Total Federal Home Loan Bank advances	$ 557,619	$ 347,692

Borrowings - Schedule of Future

Borrowings - Schedule of Future Principal Repayments (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Nov. 09, 2017
Debt Instrument Redemption [Line Items]
Total		$ 2,500
Bank Stock Loan [Member]
Debt Instrument Redemption [Line Items]
Due in one year or less	$ 1,850
Due after one year through two years	1,850
Due after two years through three years	1,850
Due after three years through four years	1,850
Due after four years through five years	2,975
Thereafter	8,000
Total	$ 18,375

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	May 04, 2018	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Number of preferred stock shares authorized		10,000,000
Preferred Stock, shares outstanding		0	0
Employee stock loan amount		$ 121	$ 121
Employee stock loan maturity date		Dec. 31, 2018
Employee stock loan interest rate		1.68%
Class A Common Stock [Member]
Class of Stock [Line Items]
Number of common stock shares authorized		45,000,000
Shares issued, par value		$ 0.01
Class A Common Stock [Member] | Kansas Bank Corporation [Member]
Class of Stock [Line Items]
Shares issued in connection with acquisition	820,849
Class A Common Stock [Member] | Adams Dairy Bancshares, Inc. [Member]
Class of Stock [Line Items]
Shares issued in connection with acquisition	344,063
Class B Common Stock [Member]
Class of Stock [Line Items]
Number of common stock shares authorized		5,000,000
Shares issued, par value		$ 0.01

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Shares Issued and Held in Treasury or Outstanding (Detail) - shares	Jun. 30, 2018	Dec. 31, 2017
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock - issued	17,051,820	15,876,650
Common stock - held in treasury	(1,271,043)	(1,271,043)
Common stock - outstanding	15,780,777	14,605,607
Class B Common Stock [Member]
Class of Stock [Line Items]
Common stock - issued	234,903	234,903
Common stock - held in treasury	(234,903)	(234,903)
Common stock - outstanding	0	0

Stockholders' Equity - Componen

Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ (5,994)	$ (3,092)
Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	(8,029)	(4,141)
Tax effect	2,035	1,049
Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(4,419)	(1,342)
Available for Sale Securities [Member] | Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	(5,919)	(1,797)
Tax effect	1,500	455
Held to Maturity Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(1,575)	(1,750)
Held to Maturity Securities [Member] | Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	(2,110)	(2,344)
Tax effect	$ 535	$ 594

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail)	1 Months Ended	6 Months Ended
	Jan. 31, 2016	Jun. 30, 2018
Regulated Operations [Abstract]
Capital conservation buffer desired rate		2.50%
Capital conservation buffer yearly increase	0.625%	0.625%

Regulatory Matters - Summary of

Regulatory Matters - Summary of Company's and Equity Bank's Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Equity Bancshares, Inc. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Actual Amount	$ 322,919	$ 288,353
Total capital to risk weighted assets, Actual Ratio	12.03%	12.54%
Tier 1 capital to risk weighted assets, Actual Amount	$ 312,836	$ 279,855
Tier 1 capital to risk weighted assets, Actual Ratio	11.65%	12.17%
Common equity Tier 1 capital to risk weighted assets, Actual Amount	$ 298,723	$ 265,887
Common equity Tier 1 capital to risk weighted assets, Actual Ratio	11.13%	11.56%
Tier 1 leverage to average assets, Actual Amount	$ 312,836	$ 279,855
Tier 1 leverage to average assets, Actual Ratio	9.36%	10.33%
Equity Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Actual Amount	$ 321,821	$ 279,712
Total capital to risk weighted assets, Actual Ratio	11.99%	12.17%
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 268,486	$ 229,927
Total capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio	10.00%	10.00%
Tier 1 capital to risk weighted assets, Actual Amount	$ 311,738	$ 271,214
Tier 1 capital to risk weighted assets, Actual Ratio	11.61%	11.80%
Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount	$ 214,789	$ 183,942
Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio	8.00%	8.00%
Common equity Tier 1 capital to risk weighted assets, Actual Amount	$ 311,738	$ 271,214
Common equity Tier 1 capital to risk weighted assets, Actual Ratio	11.61%	11.80%
Common equity Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount	$ 174,516	$ 149,452
Common equity Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio	6.50%	6.50%
Tier 1 leverage to average assets, Actual Amount	$ 311,738	$ 271,214
Tier 1 leverage to average assets, Actual Ratio	9.33%	10.01%
Tier 1 leverage to average assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount	$ 167,052	$ 135,439
Tier 1 leverage to average assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio	5.00%	5.00%
Basel III Phase-In [Member] | Equity Bancshares, Inc. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 265,134	$ 212,705
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	9.88%	9.25%
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 211,436	$ 166,715
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	7.88%	7.25%
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 171,163	$ 132,222
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	6.38%	5.75%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 133,627	$ 108,372
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	4.00%	4.00%
Basel III Phase-In [Member] | Equity Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 265,130	$ 212,682
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	9.88%	9.25%
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 211,433	$ 166,697
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	7.88%	7.25%
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 171,160	$ 132,208
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	6.38%	5.75%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 133,642	$ 108,351
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	4.00%	4.00%
Basel III Fully Phased-In [Member] | Equity Bancshares, Inc. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	10.50%	10.50%
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 281,915	$ 241,449
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 228,217	$ 195,459
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	8.50%	8.50%
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 187,943	$ 160,966
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	7.00%	7.00%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 133,627	$ 108,372
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	4.00%	4.00%
Basel III Fully Phased-In [Member] | Equity Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	10.50%	10.50%
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 281,911	$ 241,423
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 228,213	$ 195,438
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	8.50%	8.50%
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 187,940	$ 160,949
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	7.00%	7.00%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 133,642	$ 108,351
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	4.00%	4.00%

Earnings Per Share - Summary of

Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic:
Net income allocable to common stockholders	$ 6,867	$ 6,354	$ 15,578	$ 11,218
Weighted average common shares outstanding	15,353,421	12,203,252	14,982,077	12,009,238
Weighted average vested restricted stock units	11,230	1,843	8,019	1,300
Weighted average shares	15,364,651	12,205,095	14,990,096	12,010,538
Basic earnings per common share	$ 0.45	$ 0.52	$ 1.04	$ 0.93
Diluted:
Net income allocable to common stockholders	$ 6,867	$ 6,354	$ 15,578	$ 11,218
Weighted average common shares outstanding for:
Basic earnings per common share	15,364,651	12,205,095	14,990,096	12,010,538
Dilutive effects of the assumed exercise of stock options	304,999	237,267	292,165	251,785
Dilutive effects of the assumed vesting of restricted stock units	20,461	2,497	12,126	1,833
Average shares and dilutive potential common shares	15,690,111	12,444,859	15,294,387	12,264,156
Diluted earnings per common share	$ 0.44	$ 0.51	$ 1.02	$ 0.91

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average outstanding stock options, antidilutive	125,051	205,269	119,928	162,986

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	$ 180,238	$ 162,272
Cash collateral held by counterparty		164
Total assets	3,712,185	3,170,509
Residential Mortgage-Backed Securities (Issued by Government-Sponsored Entities) [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	180,238	161,591
State and Political Subdivisions [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		195
Equity Securities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		486
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative assets		164
Cash collateral held by counterparty		164
Total assets		650
Derivative liabilities		(46)
Cash collateral held by counterparty		(46)
Total liabilities		(46)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Equity Securities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		486
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative assets	539	1
Total assets	180,777	161,787
Derivative liabilities		46
Total liabilities		46
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other Assets [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative assets	539	1
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other Liabilities [Member] | Interest Rate Swaps [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities		46
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Residential Mortgage-Backed Securities (Issued by Government-Sponsored Entities) [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	$ 180,238	161,591
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | State and Political Subdivisions [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		$ 195

Fair Value - Summary of Assets

Fair Value - Summary of Assets Measured at Fair Value on Non-recurring Basis (Detail) - Level 3 [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Impaired Loans [Member] | Commercial Real Estate [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	$ 431	$ 1,439
Impaired Loans [Member] | Commercial and Industrial [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	381	1,005
Impaired Loans [Member] | Residential Real Estate [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	3,848	4,021
Impaired Loans [Member] | Agricultural Real Estate [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	255	905
Impaired Loans [Member] | Other [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	601	1,910
Other Real Estate Owned [Member] | Commercial Real Estate [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	1,604	1,018
Other Real Estate Owned [Member] | Residential Real Estate [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Assets measured at fair value on non-recurring basis	$ 131	$ 157

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Liabilities measured at fair value on a non-recurring basis	$ 0	$ 0

Fair Value - Summary of Additio

Fair Value - Summary of Additional Information about Unobservable Inputs Used in Fair Value Measurement (Detail) - Fair Value, Measurements, Nonrecurring [Member] - Impaired Loans [Member] - Level 3 [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 5,516	$ 9,280
Valuation Technique	Sales Comparison Approach
Unobservable Input	Adjustments for differences between comparable sales
Weighted average	5.00%	5.00%
Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range	15.00%	15.00%
Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range	26.00%	26.00%

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Estimated Fair Values of Financial Instrument (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 47,691	$ 52,195
Interest bearing deposits	6,991	3,496
Available-for-sale securities	180,238	162,272
Held-to-maturity securities	665,995	535,462
Loans held for sale	43,875	16,344
Loans, net of allowance for loan losses	2,401,388	2,094,781
Federal Reserve Bank and Federal Home Loan Bank stock	35,681	24,373
Interest receivable	14,343	12,371
Derivative Assets	539	1
Total assets	3,712,185	3,170,509
Deposits	2,635,048	2,382,013
Federal funds purchased and retail repurchase agreements	41,394	37,492
Federal Home Loan Bank advances	557,619	347,692
Bank stock loan	18,375	2,500
Subordinated debentures	14,113	13,968
Contractual obligations	1,734	1,967
Derivative Liabilities		46
Total liabilities	3,278,903	2,796,365
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	47,691	52,195
Interest bearing deposits	6,991	3,496
Available-for-sale securities	180,238	162,272
Held-to-maturity securities	665,995	535,462
Loans held for sale	43,875	16,344
Loans, net of allowance for loan losses	2,401,388	2,094,781
Federal Reserve Bank and Federal Home Loan Bank stock	35,681	24,373
Interest receivable	14,343	12,371
Derivative Assets	539	1
Cash collateral held by derivative counterparty		164
Total derivative assets	539	165
Total assets	3,396,741	2,901,459
Deposits	2,635,048	2,382,013
Federal funds purchased and retail repurchase agreements	41,394	37,492
Federal Home Loan Bank advances	557,619	347,692
Bank stock loan	18,375	2,500
Subordinated debentures	14,113	13,968
Contractual obligations	1,734	1,967
Interest payable	2,686	1,932
Derivative Liabilities		46
Cash collateral held by derivative counterparty		(46)
Total liabilities	3,270,969	2,787,564
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	47,691	52,195
Interest bearing deposits	6,991	3,496
Available-for-sale securities	180,238	162,272
Held-to-maturity securities	653,012	532,744
Loans held for sale	43,875	16,344
Loans, net of allowance for loan losses	2,406,148	2,098,431
Interest receivable	14,343	12,371
Derivative Assets	539	1
Cash collateral held by derivative counterparty		164
Total derivative assets	539	165
Total assets	3,352,837	2,878,018
Deposits	2,636,114	2,385,528
Federal funds purchased and retail repurchase agreements	41,394	37,492
Federal Home Loan Bank advances	557,619	347,692
Bank stock loan	18,375	2,500
Subordinated debentures	14,113	13,968
Contractual obligations	1,734	1,967
Interest payable	2,686	1,932
Derivative Liabilities		46
Cash collateral held by derivative counterparty		(46)
Total liabilities	3,272,035	2,791,079
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	47,691	52,195
Available-for-sale securities		486
Cash collateral held by derivative counterparty		164
Total derivative assets		164
Total assets	47,691	52,845
Cash collateral held by derivative counterparty		(46)
Total derivative liabilities		(46)
Total liabilities		(46)
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest bearing deposits	6,991	3,496
Available-for-sale securities	180,238	161,786
Held-to-maturity securities	653,012	532,744
Loans held for sale	43,875	16,344
Interest receivable	14,343	12,371
Derivative Assets	539	1
Total derivative assets	539	1
Total assets	898,998	726,742
Deposits	2,636,114	2,385,528
Federal funds purchased and retail repurchase agreements	41,394	37,492
Federal Home Loan Bank advances	557,619	347,692
Bank stock loan	18,375	2,500
Subordinated debentures	14,113	13,968
Contractual obligations	1,734	1,967
Interest payable	2,686	1,932
Derivative Liabilities		46
Total derivative liabilities		46
Total liabilities	3,272,035	2,791,125
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for loan losses	2,406,148	2,098,431
Total assets	$ 2,406,148	$ 2,098,431

Commitments and Credit Risk - S

Commitments and Credit Risk - Summary of Contractual Amounts of Commitments and Standby Letters of Credit to Originate Loans and Available Lines of Credit (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Standby Letters of Credit [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	$ 4,563	$ 4,064
Loans commitments, Variable Rate	2,620	3,830
Commitments to Make Loans [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	32,667	38,031
Loans commitments, Variable Rate	171,455	67,107
Mortgage Loans in the Process of Origination [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	22,242	14,803
Loans commitments, Variable Rate	3,901	9,258
Unused Lines of Credit [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	94,429	87,948
Loans commitments, Variable Rate	$ 161,038	$ 141,026

Commitments and Credit Risk - A

Commitments and Credit Risk - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018
Minimum [Member]
Commitments And Contingencies [Line Items]
Fixed interest rate loan commitments	3.75%
Fixed interest rate loan commitments maturity period	1 month
Maximum [Member]
Commitments And Contingencies [Line Items]
Fixed interest rate loan commitments	8.50%
Fixed interest rate loan commitments maturity period	110 months

Legal Matters - Additional Info

Legal Matters - Additional Information (Detail) - Obligation to Repurchase Receivables Sold - Citi Mortgage, Inc [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Loss contingency damages value	$ 2,700
Loss contingency, date of dismissal	Jan. 31, 2018
Loss contingency recorded		$ 477

Business Combinations - Additio

Business Combinations - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)Branch	Jun. 30, 2017USD ($)	Jun. 12, 2018Branch	May 04, 2018USD ($)	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Goodwill	$ 125,485		$ 125,485				$ 104,907
Total assets	3,712,185		3,712,185				3,170,509
Total loans	2,401,388		2,401,388				2,094,781
Total liabilities	3,278,903		3,278,903				2,796,365
Deposits	2,635,048		2,635,048				$ 2,382,013
Net income before income taxes	8,787	$ 9,402	20,028	$ 16,313
Kansas Bank Corporation [Member]
Business Acquisition [Line Items]
Voting interest acquired						100.00%
Acquisition-related costs	4,122		4,122
Acquisition-related costs after tax			3,151
Goodwill	13,607		$ 13,607			$ 13,607
Number of branches acquired | Branch			5
Adams Dairy Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Voting interest acquired						100.00%
Acquisition-related costs	1,049		$ 1,049
Acquisition-related costs after tax			813
Goodwill	8,465		$ 8,465			$ 8,465
Number of branches acquired | Branch			1
Cache Holdings, Inc. [Member]
Business Acquisition [Line Items]
Increase (decrease) to goodwill			$ (1,500)
Eastman National Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Increase (decrease) to goodwill			$ 55
City Bank and Trust Company [Member]
Business Acquisition [Line Items]
Business acquisition/merger agreement date			Jun. 12, 2018
Number of branches | Branch					1
Total assets	171,693		$ 171,693
Total loans	78,978		78,978
Securities	47,294		47,294
Total liabilities	153,316		153,316
Deposits	$ 133,305		133,305
Net income before income taxes			$ 394

Business Combinations - Summary

Business Combinations - Summary of the Consideration Paid and the Amounts of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	May 04, 2018	Jun. 30, 2018	Dec. 31, 2017
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill		$ 125,485	$ 104,907
Kansas Bank Corporation [Member]
Fair value of consideration:
Common stock	$ 32,103
Cash	14,918
Fair value consideration	47,021
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and due from banks	27,899
Federal Reserve Bank and Federal Home Loan Bank stock	475
Loans	159,898
Premises and equipment	5,835
Core deposit intangible	8,080
Other assets	5,482
Total assets acquired	322,517
Deposits	288,352
Interest payable and other liabilities	751
Total liabilities assumed	289,103
Total identifiable net assets	33,414
Goodwill	13,607	13,607
Total	47,021
Kansas Bank Corporation [Member] | Available for Sale Securities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Held-to maturity/Available-for-sale securities	22,820
Kansas Bank Corporation [Member] | Held to Maturity Securities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Held-to maturity/Available-for-sale securities	92,028
Adams Dairy Bancshares, Inc. [Member]
Fair value of consideration:
Common stock	13,456
Cash	3,960
Fair value consideration	17,416
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and due from banks	2,812
Interest bearing time deposits in other banks	4,237
Federal Reserve Bank and Federal Home Loan Bank stock	194
Loans	82,716
Premises and equipment	4,485
Bank-owned life insurance	2,869
Core deposit intangible	1,990
Other assets	1,042
Total assets acquired	111,357
Deposits	97,124
Federal Home Loan Bank advances	1,000
Interest payable and other liabilities	4,282
Total liabilities assumed	102,406
Total identifiable net assets	8,951
Goodwill	8,465	$ 8,465
Total	17,416
Adams Dairy Bancshares, Inc. [Member] | Available for Sale Securities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Held-to maturity/Available-for-sale securities	10,677
Adams Dairy Bancshares, Inc. [Member] | Held to Maturity Securities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Held-to maturity/Available-for-sale securities	$ 335

Business Combinations - Informa

Business Combinations - Information about Loans Acquired (Detail) $ in Thousands	May 04, 2018USD ($)
Kansas Bank Corporation [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	$ 159,898
Kansas Bank Corporation [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractually required principal	160,526
Cash flows expected to be collected	160,526
Accretable yield	(3,389)
Fair value of acquired loans	157,137
Kansas Bank Corporation [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractually required principal	5,066
Non-accretable difference (expected losses)	(2,305)
Cash flows expected to be collected	2,761
Fair value of acquired loans	2,761
Adams Dairy Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	82,716
Adams Dairy Bancshares, Inc. [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractually required principal	84,225
Cash flows expected to be collected	84,225
Accretable yield	(2,748)
Fair value of acquired loans	81,477
Adams Dairy Bancshares, Inc. [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractually required principal	1,477
Non-accretable difference (expected losses)	(238)
Cash flows expected to be collected	1,239
Fair value of acquired loans	$ 1,239

Business Combinations - Carryin

Business Combinations - Carrying Value of Loans Acquired (Detail) $ in Thousands	May 04, 2018USD ($)
Kansas Bank Corporation [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	$ 159,898
Kansas Bank Corporation [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	157,137
Kansas Bank Corporation [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,761
Kansas Bank Corporation [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	96,899
Kansas Bank Corporation [Member] | Commercial Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	94,924
Kansas Bank Corporation [Member] | Commercial Real Estate [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,975
Kansas Bank Corporation [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	19,470
Kansas Bank Corporation [Member] | Commercial and Industrial [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	18,848
Kansas Bank Corporation [Member] | Commercial and Industrial [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	622
Kansas Bank Corporation [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,898
Kansas Bank Corporation [Member] | Residential Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,898
Kansas Bank Corporation [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	22,532
Kansas Bank Corporation [Member] | Agricultural Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	22,532
Kansas Bank Corporation [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	3,539
Kansas Bank Corporation [Member] | Consumer [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	3,539
Kansas Bank Corporation [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	14,560
Kansas Bank Corporation [Member] | Agricultural [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	14,396
Kansas Bank Corporation [Member] | Agricultural [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	164
Adams Dairy Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	82,716
Adams Dairy Bancshares, Inc. [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	81,477
Adams Dairy Bancshares, Inc. [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,239
Adams Dairy Bancshares, Inc. [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	75,477
Adams Dairy Bancshares, Inc. [Member] | Commercial Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	74,657
Adams Dairy Bancshares, Inc. [Member] | Commercial Real Estate [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	820
Adams Dairy Bancshares, Inc. [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,421
Adams Dairy Bancshares, Inc. [Member] | Commercial and Industrial [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,002
Adams Dairy Bancshares, Inc. [Member] | Commercial and Industrial [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	419
Adams Dairy Bancshares, Inc. [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	4,955
Adams Dairy Bancshares, Inc. [Member] | Residential Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	4,955
Adams Dairy Bancshares, Inc. [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	863
Adams Dairy Bancshares, Inc. [Member] | Consumer [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	$ 863