Equity Bancshares (EQBK) 10-Q 9 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 04, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
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		12,019,806
Class B Non-Voting Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		186,513

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks	$ 24,193	$ 34,137
Federal funds sold	19	958
Cash and cash equivalents	24,212	35,095
Interest-bearing time deposits in other banks	4,241	3,750
Available-for-sale securities	92,435	95,732
Held-to-maturity securities, fair value of $531,296 and $461,156	532,159	465,709
Loans held for sale	3,463	4,830
Loans, net of allowance for loan losses of $7,568 and $6,432	1,521,828	1,377,173
Other real estate owned, net	11,714	8,656
Premises and equipment, net	54,693	50,515
Bank owned life insurance	48,765	48,055
Federal Reserve Bank and Federal Home Loan Bank stock	19,795	16,652
Interest receivable	9,062	6,991
Goodwill	64,587	58,874
Core deposit intangible, net	5,719	4,715
Other	15,951	15,445
Total assets	2,408,624	2,192,192
Deposits
Demand	262,508	207,668
Total non-interest-bearing deposits	262,508	207,668
Savings, NOW, and money market	901,396	869,625
Time	655,773	553,158
Total interest-bearing deposits	1,557,169	1,422,783
Total deposits	1,819,677	1,630,451
Federal funds purchased and retail repurchase agreements	21,069	20,637
Federal Home Loan Bank advances	257,408	259,588
Subordinated debentures	13,825	13,684
Contractual obligations	2,211	2,504
Interest payable and other liabilities	8,376	7,364
Total liabilities	2,122,566	1,934,228
Commitments and contingent liabilities
Stockholders' equity
Common stock	137	132
Additional paid-in capital	252,469	236,103
Retained earnings	55,546	44,328
Accumulated other comprehensive loss	(2,269)	(2,702)
Employee stock loans	(170)	(242)
Treasury stock	(19,655)	(19,655)
Total stockholders’ equity	286,058	257,964
Total liabilities and stockholders’ equity	$ 2,408,624	$ 2,192,192

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Held-to-maturity securities, fair value	$ 531,296		$ 461,156
Loans, allowance for loan losses	$ 7,568	$ 7,048	$ 6,432	$ 6,030	$ 5,980	$ 5,506

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest and dividend income
Loans, including fees	$ 20,662	$ 11,551	$ 40,062	$ 23,392
Securities, taxable	3,224	1,987	5,948	4,196
Securities, nontaxable	862	332	1,647	660
Federal funds sold and other	334	510	640	994
Total interest and dividend income	25,082	14,380	48,297	29,242
Interest expense
Deposits	2,894	1,670	5,470	3,277
Federal funds purchased and retail repurchase agreements	13	14	25	26
Federal Home Loan Bank advances	734	345	1,236	677
Subordinated debentures	242	157	474	310
Total interest expense	3,883	2,186	7,205	4,290
Net interest income	21,199	12,194	41,092	24,952
Provision for loan losses	628	532	1,723	1,255
Net interest income after provision for loan losses	20,571	11,662	39,369	23,697
Non-interest income
Service charges and fees	1,224	807	2,376	1,586
Debit card income	1,205	728	2,210	1,405
Mortgage banking	540	335	1,025	577
Increase in value of bank owned life insurance	354	246	709	497
Net gain from securities transactions	83	59	96	479
Other	556	277	885	606
Total non-interest income	3,962	2,452	7,301	5,150
Non-interest expense
Salaries and employee benefits	8,236	5,246	16,042	10,458
Net occupancy and equipment	1,519	1,068	3,018	2,162
Data processing	1,191	869	2,352	1,707
Professional fees	462	568	978	1,017
Advertising and business development	624	330	1,142	548
Telecommunications	330	287	691	518
FDIC insurance	219	255	325	513
Courier and postage	236	158	462	303
Free nationwide ATM cost	233	163	445	315
Amortization of core deposit intangible	235	86	444	173
Loan expense	282	168	459	260
Other real estate owned	70	(58)	275	8
Loss on debt extinguishment				58
Merger expenses	136		1,062
Other	1,358	801	2,662	1,590
Total non-interest expense	15,131	9,941	30,357	19,630
Income before income taxes	9,402	4,173	16,313	9,217
Provision for income taxes	3,048	1,327	5,095	2,931
Net income	6,354	2,846	11,218	6,286
Dividends and discount accretion on preferred stock				(1)
Net income allocable to common stockholders	$ 6,354	$ 2,846	$ 11,218	$ 6,285
Basic earnings per share	$ 0.52	$ 0.35	$ 0.93	$ 0.77
Diluted earnings per share	$ 0.51	$ 0.34	$ 0.91	$ 0.75

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,354	$ 2,846	$ 11,218	$ 6,286
Other comprehensive income:
Unrealized holding gains (losses) arising during the period on available-for-sale securities	321	425	533	1,633
Amortization of unrealized losses on held-to-maturity securities	127	152	264	292
Reclassification adjustment for net gains included in net income	(83)	(473)	(96)	(893)
Total other comprehensive income (loss)	365	104	701	1,032
Tax effect	(139)	(42)	(268)	(393)
Other comprehensive income (loss), net of tax	226	62	433	639
Comprehensive income	$ 6,580	$ 2,908	$ 11,651	$ 6,925

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Employee Stock Loans [Member]	Treasury Stock [Member]	Preferred Stock, Series C [Member]
Beginning balance at Dec. 31, 2015	$ 167,233	$ 97	$ 138,077	$ 34,955	$ (2,371)	$ (242)	$ (19,655)	$ 16,372
Beginning balance, shares at Dec. 31, 2015		8,211,727
Net income	6,286			6,286
Other comprehensive income, net of tax effects	639				639
Retirement of preferred stock	(16,372)							$ (16,372)
Stock based compensation	282		282
Common stock issued upon exercise of stock options	121		121
Cash dividends declared and accrued on preferred stock	(1)			(1)
Beginning balance at Jun. 30, 2016	158,188	$ 97	138,480	41,240	(1,732)	(242)	(19,655)
Ending balance, shares at Jun. 30, 2016		8,219,415
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 of Prairie State Bancshares, net of issuance expenses	14,913	$ 5	14,908
Issuance of common stock in connection with the acquisition of Prairie State Bancshares, net of issuance expenses, shares		479,465
Beginning 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

Consolidated Statements of Sto7

Consolidated Statements of Stockholders' Equity (Parenthetical) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Prairie State Bancshares, Inc. [Member]
Issuance expense on issuance of common stock	$ 329

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income	$ 11,218	$ 6,286
Adjustments to reconcile net income to net cash from operating activities:
Stock based compensation	732	282
Depreciation	1,197	841
Provision for loan losses	1,723	1,255
Net (accretion) amortization of purchase valuation adjustments	(2,749)	192
Amortization of premiums and discounts on securities	1,225	1,265
Amortization of intangibles	447	176
Deferred income taxes	(53)	(34)
FHLB stock dividends	(380)	(327)
Loss (gain) on sales and valuation adjustments on other real estate owned	(14)	(142)
Net loss (gain) on securities transactions	(96)	(479)
Loss (gain) on disposal of premise and equipment	(10)	(39)
Loss (gain) on sales of loans	(856)	(496)
Originations of loans held for sale	(35,180)	(21,987)
Proceeds from the sale of loans held for sale	37,402	21,985
Increase in the value of bank owned life insurance	(710)	(497)
Change in fair value of derivatives recognized in earnings	(1)	4
Net change in:
Interest receivable	257	217
Other assets	(716)	(314)
Interest payable and other liabilities	604	(918)
Net cash provided by (used in) operating activities	14,040	7,270
Cash flows to investing activities
Purchases of available-for-sale securities	(13,660)	(25,576)
Purchases of held-to-maturity securities	(89,853)	(25,811)
Proceeds from sales, calls, pay-downs, and maturities of available-for-sale securities	17,452	82,774
Proceeds from calls, pay-downs and maturities of held-to-maturity securities	26,877	19,677
Net change in interest-bearing time deposits in other banks	(491)
Net change in loans	(17,212)	(21,038)
Purchase of premises and equipment	(2,955)	(863)
Proceeds from sale of premise and equipment	13	175
Net redemption (purchase) of FHLB and FRB stock	(2,565)	465
Proceeds from sale of other real estate owned	932	2,391
Purchase of Prairie, net of cash acquired	6,005
Net cash provided by (used in) investing activities	(87,467)	32,194
Cash flows (to) from financing activities
Net increase (decrease) in deposits	63,786	(19,153)
Net change in federal funds purchased and retail repurchase agreements	432	2,020
Net borrowings (payments) on Federal Home Loan Bank line of credit	(2,180)	2,209
Principal payments on bank stock loan		(18,612)
Principal payments on employee stock loans	73
Proceeds from the exercise of employee stock options	726	109
Redemption of Series C preferred stock		(16,372)
Net change in contractual obligations	(293)	(262)
Dividends paid on preferred stock		(42)
Excess tax benefits recognized on exercise of employee stock options		12
Net cash provided by (used in) financing activities	62,544	(50,091)
Net change in cash and cash equivalents	(10,883)	(10,627)
Cash and cash equivalents, beginning of period	35,095	56,829
Ending cash and cash equivalents	24,212	46,202
Supplemental cash flow information:
Interest paid	6,441	4,167
Income taxes paid, net of refunds	2,922	1,580
Supplemental noncash disclosures:
Other real estate owned acquired in settlement of loans	3,976	1,336
Securities purchased but not settled	1,161	$ 1,954
Total fair value of assets acquired in purchase of Prairie, net of cash	146,509
Total fair value of liabilities assumed in purchase of Prairie, net of cash	$ 125,591

BASIS OF PRESENTATION

BASIS OF PRESENTATION	6 Months Ended
	Jun. 30, 2017
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, 2016 included in the Company’s Annual Report on Form 10-K filed with the SEC on March 16, 2017. Operating results for the three and six months ended June 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 or any other period. Effective January 1, 2017, the Company adopted the provisions of Accounting Standards Update (ASU) 2016-09, Improvements to Employee Share-Based Payment Accounting Recent Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers, In January 2016, FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, In February 2016, FASB issued ASU 2016-02, Leases, In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses, In August 2016, FASB issued accounting standards update No. 2016-15, Statement of Cash Flows (Topic 230). 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

SECURITIES

SECURITIES	6 Months Ended
	Jun. 30, 2017
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 were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value June 30, 2017 Available-for-sale securities Residential mortgage-backed securities (issued by government-sponsored entities) $ 92,320 $ 193 $ (1,259 ) $ 91,254 Small Business Administration loan pools 182 11 — 193 State and political subdivisions 496 3 — 499 Equity securities 500 — (11 ) 489 $ 93,498 $ 207 $ (1,270 ) $ 92,435 December 31, 2016 Available-for-sale securities U.S. Government-sponsored entities $ 4,766 $ 16 $ — $ 4,782 Residential mortgage-backed securities (issued by government-sponsored entities) 88,257 93 (1,647 ) 86,703 Corporate 3,000 39 — 3,039 Small Business Administration loan pools 210 13 — 223 State and political subdivisions 499 — — 499 Equity securities 500 — (14 ) 486 $ 97,232 $ 161 $ (1,661 ) $ 95,732 The amortized cost and fair value of held-to-maturity securities and the related gross unrecognized gains and losses were as follows: Amortized Cost Gross Unrecognized Gains Gross Unrecognized Losses Fair Value June 30, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ 998 $ — $ (10 ) $ 988 Residential mortgage-backed (securities issued by government sponsored entities) $ 382,278 $ 1,000 $ (3,371 ) 379,907 Corporate 22,990 445 — 23,435 Small Business Administration loan pools 2,229 8 (6 ) 2,231 State and political subdivisions 123,664 1,802 (731 ) 124,735 $ 532,159 $ 3,255 $ (4,118 ) $ 531,296 December 31, 2016 Held-to-maturity securities U.S. Government-sponsored entities $ 998 $ — $ (33 ) $ 965 Residential mortgage-backed (securities issued by government sponsored entities) 338,749 686 (4,702 ) 334,733 Corporate 12,988 139 (28 ) 13,099 Small Business Administration loan pools 2,398 1 (17 ) 2,382 State and political subdivisions 110,576 1,211 (1,810 ) 109,977 $ 465,709 $ 2,037 $ (6,590 ) $ 461,156 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, 2017, 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 $ 196 $ 196 $ 3,111 $ 3,121 One to five years 300 303 23,434 23,931 Five to ten years — — 46,005 47,194 After ten years 182 193 77,331 77,143 Mortgage-backed securities 92,320 91,254 382,278 379,907 Total debt securities $ 92,998 $ 91,946 $ 532,159 $ 531,296 The carrying value of securities pledged as collateral, to secure public deposits and for other purposes, was approximately $438,442 at June 30, 2017 and $439,208 at December 31, 2016. 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, 2017 and December 31, 2016: Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2017 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 66,189 $ (1,259 ) $ — $ — $ 66,189 $ (1,259 ) Equity securities — — 489 (11 ) 489 (11 ) Total temporarily impaired securities $ 66,189 $ (1,259 ) $ 489 $ (11 ) $ 66,678 $ (1,270 ) December 31, 2016 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 77,414 $ (1,647 ) $ — $ — $ 77,414 $ (1,647 ) Equity securities — — 486 (14 ) 486 (14 ) Total temporarily impaired securities $ 77,414 $ (1,647 ) $ 486 $ (14 ) $ 77,900 $ (1,661 ) Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ 989 $ (10 ) $ — $ — $ 989 $ (10 ) Residential mortgage-backed (issued by government-sponsored entities) 286,377 (4,346 ) 10,272 (380 ) 296,649 (4,726 ) Small Business Administration loan pools — — 1,226 (34 ) 1,226 (34 ) State and political subdivisions 41,285 (765 ) — — 41,285 (765 ) Total temporarily impaired securities $ 328,651 $ (5,121 ) $ 11,498 $ (414 ) $ 340,149 $ (5,535 ) December 31, 2016 Held-to-maturity securities U.S. Government-sponsored entities $ 965 $ (33 ) $ — $ — $ 965 $ (33 ) Residential mortgage-backed (issued by government-sponsored entities) 291,003 (5,922 ) 10,801 (426 ) 301,804 (6,348 ) Corporate 5,407 (16 ) 3,166 (28 ) 8,573 (44 ) Small Business Administration loan pools 1,068 (2 ) 1,314 (45 ) 2,382 (47 ) State and political subdivisions 65,220 (2,122 ) — — 65,220 (2,122 ) Total temporarily impaired securities $ 363,663 $ (8,095 ) $ 15,281 $ (499 ) $ 378,944 $ (8,594 ) 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, 2017, the Company held 19 available-for-sale securities and 247 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 below: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Proceeds $ 3,083 $ 50,499 $ 6,522 $ 70,957 Gross gains 83 473 96 893 Gross losses — — — — Income tax expense on net realized gains 32 181 37 342

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Loans and Allowance for Loan Losses	NOTE 3 – LOANS AND ALLOWANCE FOR LOAN LOSSES Categories of loans at June 30, 2017 and December 31, 2016 include: June 30, 2017 December 31, 2016 Commercial real estate $ 640,539 $ 593,108 Commercial and industrial 360,687 348,465 Residential real estate 326,097 338,387 Agricultural real estate 69,371 38,331 Consumer 43,241 40,902 Agricultural 89,461 24,412 Total loans 1,529,396 1,383,605 Allowance for loan losses (7,568 ) (6,432 ) Net loans $ 1,521,828 $ 1,377,173 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, 2017 and December 31, 2016, 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, 2017 and December 31, 2016, residential real estate loans include $82,239 and $90,705 of purchased residential real estate loans from these pools of 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 $2,518 at June 30, 2017, and $3,043 at December 31, 2016. Over-draft deposit accounts are reclassified and included in consumer loans above. These accounts totaled $894 at June 30, 2017 and $567 at December 31, 2016. The following tables present the activity in the allowance for loan losses by class for the three-month periods ended June 30, 2017 and 2016: 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 June 30, 2016 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,275 $ 1,563 $ 1,940 $ 41 $ 79 $ 82 $ 5,980 Provision for loan losses 196 16 157 — 182 (19 ) 532 Loans charged-off (190 ) (7 ) (200 ) — (153 ) — (550 ) Recoveries 27 2 20 — 19 — 68 Total ending allowance balance $ 2,308 $ 1,574 $ 1,917 $ 41 $ 127 $ 63 $ 6,030 The following tables present the activity in the allowance for loan losses by class for the six-month periods ended June 30, 2017 and 2016: 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 June 30, 2016 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,051 $ 1,366 $ 1,824 $ 29 $ 187 $ 49 $ 5,506 Provision for loan losses 449 261 315 35 179 16 1,255 Loans charged-off (224 ) (62 ) (248 ) (23 ) (281 ) (3 ) (841 ) Recoveries 32 9 26 — 42 1 110 Total ending allowance balance $ 2,308 $ 1,574 $ 1,917 $ 41 $ 127 $ 63 $ 6,030 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, 2017 and December 31, 2016: June 30, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 204 $ 51 $ 358 $ 34 $ 35 $ 28 $ 710 Collectively evaluated for impairment 2,515 2,019 1,592 69 486 116 6,797 Purchase credit impaired loans 5 — 49 6 1 — 61 Total $ 2,724 $ 2,070 $ 1,999 $ 109 $ 522 $ 144 $ 7,568 Loan Balance: Individually evaluated for impairment $ 2,837 $ 1,542 $ 3,979 $ 398 $ 352 $ 292 $ 9,400 Collectively evaluated for impairment 627,923 354,760 320,081 65,255 42,883 85,326 1,496,228 Purchase credit impaired loans 9,779 4,385 2,037 3,718 6 3,843 23,768 Total $ 640,539 $ 360,687 $ 326,097 $ 69,371 $ 43,241 $ 89,461 $ 1,529,396 December 31, 2016 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 270 $ 22 $ 288 $ 2 $ 45 $ — $ 627 Collectively evaluated for impairment 2,150 1,859 1,477 33 221 65 5,805 Purchase credit impaired loans — — — — — — — Total $ 2,420 $ 1,881 $ 1,765 $ 35 $ 266 $ 65 $ 6,432 Loan Balance: Individually evaluated for impairment $ 3,182 $ 550 $ 3,321 $ 834 $ 429 $ 3 $ 8,319 Collectively evaluated for impairment 577,863 344,414 332,962 36,668 40,471 24,409 1,356,787 Purchase credit impaired loans 12,063 3,501 2,104 829 2 — 18,499 Total $ 593,108 $ 348,465 $ 338,387 $ 38,331 $ 40,902 $ 24,412 $ 1,383,605 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, 2017 and December 31, 2016. The recorded investment in loans excludes accrued interest receivable due to immateriality. June 30, 2017 December 31, 2016 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 $ 1,023 $ 1,005 $ — $ 904 $ 676 $ — Commercial and industrial 1,231 1,025 — 510 309 — Residential real estate 648 397 — 1,230 980 — Agricultural real estate 62 62 — 824 812 — Consumer 29 — — 53 51 — Agricultural 12 12 — — — — Subtotal 3,005 2,501 — 3,521 2,828 — With an allowance recorded: Commercial real estate 2,388 1,884 209 4,493 2,506 270 Commercial and industrial 545 517 51 265 240 22 Residential real estate 4,330 4,072 407 2,433 2,341 288 Agricultural real estate 503 399 40 23 23 2 Consumer 458 358 36 449 378 45 Agricultural 280 280 28 3 3 — Subtotal 8,504 7,510 771 7,666 5,491 627 Total $ 11,509 $ 10,011 $ 771 $ 11,187 $ 8,319 $ 627 The tables below present average recorded investment and interest income related to impaired loans for the three months and six months ended June 30, 2017 and 2016. 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, 2017 June 30, 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 1,099 $ — $ 1,464 $ 4 Commercial and industrial 1,034 — 716 — Residential real estate 330 1 652 3 Agricultural real estate 31 12 698 — Consumer — — 14 — Agricultural 7 — 104 1 Subtotal 2,501 13 3,648 8 With an allowance recorded: Commercial real estate 2,229 7 2,036 4 Commercial and industrial 558 — 117 — Residential real estate 3,563 13 911 3 Agricultural real estate 339 — — — Consumer 383 2 217 5 Agricultural 150 — 61 — Subtotal 7,222 22 3,342 12 Total $ 9,723 $ 35 $ 6,990 $ 20 As of and for the six months ended June 30, 2017 June 30, 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 841 $ 7 $ 1,233 $ 4 Commercial and industrial 667 3 845 — Residential real estate 688 1 662 3 Agricultural real estate 437 12 399 — Consumer 26 — 16 — Agricultural 6 — 100 1 Subtotal 2,665 23 3,255 8 With an allowance recorded: Commercial real estate 2,195 9 2,516 4 Commercial and industrial 378 1 109 — Residential real estate 3,207 15 877 3 Agricultural real estate 211 — — — Consumer 368 2 177 5 Agricultural 141 — 35 — Subtotal 6,500 27 3,714 12 Total $ 9,165 $ 50 $ 6,969 $ 20 The following tables present the aging of the recorded investment in past due loans as of June 30, 2017 and December 31, 2016, by portfolio and class of loans: June 30, 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 $ 651 $ 14 $ 250 $ 6,980 $ 632,644 $ 640,539 Commercial and industrial 255 387 — 5,922 354,123 360,687 Residential real estate 18 709 — 4,849 320,521 326,097 Agricultural real estate 26 — — 3,638 65,707 69,371 Consumer 293 91 — 358 42,499 43,241 Agricultural 608 — 21 4,135 84,697 89,461 Total $ 1,851 $ 1,201 $ 271 $ 25,882 $ 1,500,191 $ 1,529,396 December 31, 2016 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 $ 2,955 $ 788 $ — $ 12,258 $ 577,107 $ 593,108 Commercial and industrial 419 — — 4,051 343,995 348,465 Residential real estate 368 847 — 4,285 332,887 338,387 Agricultural real estate — — — 1,664 36,667 38,331 Consumer 303 43 — 432 40,124 40,902 Agricultural 52 — — 3 24,357 24,412 Total $ 4,097 $ 1,678 $ — $ 22,693 $ 1,355,137 $ 1,383,605 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, 2017 and December 31, 2016: June 30, 2017 Unclassified Classified Total Commercial real estate $ 616,362 $ 24,177 $ 640,539 Commercial and industrial 346,510 14,177 360,687 Residential real estate 321,091 5,006 326,097 Agricultural real estate 63,906 5,465 69,371 Consumer 42,871 370 43,241 Agricultural 85,168 4,293 89,461 Total $ 1,475,908 $ 53,488 $ 1,529,396 December 31, 2016 Unclassified Classified Total Commercial real estate $ 576,070 $ 17,038 $ 593,108 Commercial and industrial 341,307 7,158 348,465 Residential real estate 333,298 5,089 338,387 Agricultural real estate 36,190 2,141 38,331 Consumer 40,382 520 40,902 Agricultural 24,134 278 24,412 Total $ 1,351,381 $ 32,224 $ 1,383,605 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 recorded investments in purchase credit impaired loans as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Contractually required principal payments $ 32,584 $ 27,413 Discount (8,816 ) (8,914 ) Recorded investment $ 23,768 $ 18,499 The remaining estimated accretable yield associated with these loans was $1,920 and $1,063 as of June 30, 2017 and December 31, 2016. The interest income recognized on these loans for the three-month and six-month periods ended June 30, 2017 and 2016 was $699, $1,412, $86 and $238. For the three-month and six periods ended June 30, 2017 there was an $8 provision for loan loss reversal and a $61 provision for loan losses recorded for these loans. For the three and six-month periods ended June 30, 2016, there was a provision for loan losses of $0 and $0 recorded for these loans. Troubled Debt Restructurings The Company had no loans modified under troubled debt restructurings as of June 30, 2017 or December 31, 2016.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2017
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, 2017, the portfolio of interest rate swaps had a weighted average maturity of 9.1 years, a weighted average pay rate of 4.93% and a weighted average rate received of 3.83%. At December 31, 2016, the portfolio of interest rate swaps had a weighted average maturity of 9.0 years, a weighted average pay rate of 4.82% and a weighted average rate received of 3.50%. 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, 2017, the interest rate cap had a term of 2.4 years and a cap rate of 4.50%. At December 31, 2016, the interest rate cap had a term of 2.9 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, 2017 and December 31, 2016: June 30, 2017 December 31, 2016 Notional Amount Derivative Assets Derivative Liabilities Notional Amount Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate swaps $ 17,432 $ — $ 206 $ 15,923 $ — $ 39 Total derivatives designated as hedging relationships 17,432 — 206 15,923 — 39 Derivatives not designated as hedging instruments: Interest rate caps/floors 2,745 — — 2,865 1 — Total derivatives not designated as hedging instruments 2,745 — — 2,865 1 — Total $ 20,177 — 206 $ 18,788 1 39 Cash collateral — (190 ) — (190 ) Netting adjustments — — 151 151 Net amount presented in Balance Sheet $ — $ 16 $ 152 $ — For the three-month and six-month periods ended June 30, 2017 and 2016, the Company recorded net gains/(losses) on derivatives and hedging activities: Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 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 ) (1 ) (2 ) Total net gains (losses) related to derivatives not designated as hedging instruments — (1 ) (1 ) (2 ) Net gains (losses) on derivatives and hedging activities $ — $ (1 ) $ (1 ) $ (2 ) 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, 2017 and 2016. 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 ) June 30, 2016 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 $ (325 ) $ 325 $ — $ (47 ) Total $ (325 ) $ 325 $ — $ (47 ) 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, 2017 and 2016. 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 ) June 30, 2016 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 $ (850 ) $ 850 $ — $ (86 ) Total $ (850 ) $ 850 $ — $ (86 )

BORROWINGS

BORROWINGS	6 Months Ended
	Jun. 30, 2017
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, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Federal funds purchased $ — $ — Retail repurchase agreements 21,069 20,637 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 $21,829 and $23,389 at June 30, 2017 and December 31, 2016. The agreements are on a day-to-day basis and can be terminated on demand. June 30, 2017 December 31, 2016 Year-to-date average daily balance during the period $ 20,133 $ 22,599 Maximum month-end balance during the period $ 22,782 $ 25,382 Weighted average interest rate at period-end 0.25 % 0.27 % Federal Home Loan Bank advances Federal Home Loan Bank advances as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Federal Home Loan Bank line of credit advances $ 257,408 $ 259,588 Federal Home Loan Bank fixed rate term advances — — Total Federal Home Loan Bank advances $ 257,408 $ 259,588 At June 30, 2017, the Company had $257,408 drawn against its line of credit at a weighted average rate of 1.24%. At December 31, 2016, the $259,588 drawn against the Federal Home Loan Bank line of credit was at a weighted average rate of 0.72%. The advances, Mortgage Partnership Finance credit enhancement obligations and letters of credit were collateralized by certain qualifying loans totaling $467,472 and $454,025 at June 30, 2017 and December 31, 2016. Based on this collateral and the Company’s holdings of Federal Home Loan Bank stock, the Company was eligible to borrow an additional $204,561 and $193,674 at June 30, 2017 and December 31, 2016. Bank stock loan On January 28, 2016, the Company entered into an agreement with an unaffiliated financial institution that provided for a maximum borrowing facility of $20,000, secured by the Company’s stock in Equity Bank. At December 31, 2016, there was no outstanding balance on this loan. The borrowing facility matured on January 26, 2017, and was subsequently extended, at which time the Company entered into a new agreement with the same lender that provides for a maximum borrowing facility of $30,000, secured by the Company’s stock in Equity Bank. At June 30, 2017, there was no outstanding balance on this loan. The borrowing facility will mature on March 12, 2018. 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 The terms of the borrowing facility require the Company and Equity Bank to maintain minimum capital ratios and other covenants. 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, 2017
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, 2017 and December 31, 2016, 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, 2017 and December 31, 2016: June 30, 2017 December 31, 2016 Class A common stock – issued 13,290,849 12,393,124 Class A common stock – held in treasury (1,271,043 ) (1,271,043 ) Class A common stock – outstanding 12,019,806 11,122,081 Class B common stock – issued 421,416 793,130 Class B common stock – held in treasury (234,903 ) (234,903 ) Class B common stock – outstanding 186,513 558,227 Treasury stock is stated at cost, determined by the first-in, first-out method. On March 10, 2017, the Company completed its acquisition of Prairie State Bancshares, Inc. (“Prairie”) of Hoxie, Kansas. There were a total of 479,465 shares of Class A common stock issued in connection with this acquisition. Agreements with certain owners of Class B common stock require the Company to issue Class A common stock to replace an equal number of Class B common stock in the event of a future transfer from the owner to an unaffiliated party. The Class B common stock owner may require this exchange in certain stipulated transactions including the transfer of shares of Class B common stock to: (1) the Company or its bank subsidiary, (2) in a widespread public distribution, (3) a transfer in which no transferee receives two percent or more of any class of the Company’s voting securities, or (4) to a transferee that would control more than fifty percent of the Company’s voting securities without any transfer from the purchaser. Restricted stock unit plan termination loans In May 2015, in connection with the termination of the Company’s restricted stock unit plan (“RSUP”), 203,216 shares of Class A common stock were issued to employees with vested restricted stock units. Also in connection with the termination of the RSUP, the Company agreed to loan electing participants an amount equal to each participant’s federal and state income tax withholding obligation associated with the stock issuance. These loans totaling $170 at June 30, 2017 and $242 at December 31, 2016, are collateralized with the shares received, have a maturity date of December 31, 2017 and have an interest rate of 0.96%. Accumulated other comprehensive income (loss) At June 30, 2017 and December 31, 2016, 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, 2017 and December 31, 2016 were as follows: Available-for- Sale Securities Held-to- Maturity Securities Accumulated Other Comprehensive Income June 30, 2017 Net unrealized or unamortized gains (losses) $ (1,063 ) $ (2,612 ) $ (3,675 ) Tax effect 407 999 1,406 $ (656 ) $ (1,613 ) $ (2,269 ) December 31, 2016 Net unrealized or unamortized gains (losses) $ (1,500 ) $ (2,876 ) $ (4,376 ) Tax effect 574 1,100 1,674 $ (926 ) $ (1,776 ) $ (2,702 )

REGULATORY MATTERS

REGULATORY MATTERS	6 Months Ended
	Jun. 30, 2017
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, 2017, 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, 2017 and December 31, 2016 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, 2017 Total capital to risk weighted assets Equity Bancshares, Inc. $ 242,616 14.34 % $ 156,517 9.25 % $ 177,667 10.50 % $ N/A N/A Equity Bank 224,162 13.25 % 156,522 9.25 % 177,674 10.50 % 169,213 10.00 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 235,048 13.89 % 122,675 7.25 % 143,826 8.50 % N/A N/A Equity Bank 216,594 12.80 % 122,680 7.25 % 143,831 8.50 % 135,371 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 221,223 13.07 % 97,294 5.75 % 118,445 7.00 % N/A N/A Equity Bank 216,594 12.80 % 97,298 5.75 % 118,449 7.00 % 109,989 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 235,048 10.15 % 92,628 4.00 % 92,628 4.00 % N/A N/A Equity Bank 216,594 9.35 % 92,634 4.00 % 92,634 4.00 % 115,793 5.00 % December 31, 2016 Total capital to risk weighted assets Equity Bancshares, Inc. $ 221,779 14.67 % $ 130,372 8.63 % $ 158,714 10.50 % $ N/A N/A Equity Bank 196,478 13.01 % 130,283 8.63 % 158,606 10.50 % 151,053 10.0 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 215,347 14.25 % 100,141 6.63 % 128,483 8.50 % N/A N/A Equity Bank 190,046 12.58 % 100,073 6.63 % 128,395 8.50 % 120,842 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 201,663 13.34 % 77,468 5.13 % 105,809 7.00 % N/A N/A Equity Bank 190,046 12.58 % 77,415 5.13 % 105,737 7.00 % 98,184 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 215,347 11.81 % 72,920 4.00 % 72,920 4.00 % N/A N/A Equity Bank 190,046 10.42 % 72,924 4.00 % 72,924 4.00 % 91,155 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, 2017
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, 2017 and 2016: Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 Basic: Net income allocable to common stockholders $ 6,354 $ 2,846 $ 11,218 $ 6,285 Weighted average common shares outstanding 12,205,095 8,216,097 12,010,538 8,213,912 Weighted average vested restricted stock units — — — — Weighted average shares 12,205,095 8,216,097 12,010,538 8,213,912 Basic earnings per common share $ 0.52 $ 0.35 $ 0.93 $ 0.77 Diluted: Net income allocable to common stockholders $ 6,354 $ 2,846 $ 11,218 $ 6,285 Weighted average common shares outstanding for: Basic earnings per common share 12,205,095 8,216,097 12,010,538 8,213,912 Dilutive effects of the assumed exercise of stock options 239,764 113,202 253,618 112,703 Average shares and dilutive potential common shares 12,444,859 8,329,299 12,264,156 8,326,615 Diluted earnings per common share $ 0.51 $ 0.34 $ 0.91 $ 0.75 Average outstanding stock options of 205,269 and 128,921 for the three-month periods ended June 30, 2017 and 2016 and 162,986 and 130,973 for the six-month periods ended June 30, 2017 and 2016 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, 2017
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 agencies, 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 below: June 30, 2017 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: Residential mortgage-backed securities (issued by government-sponsored entities) $ — $ 91,254 $ — Small Business Administration loan pools — 193 — State and political subdivisions — 499 — Equity securities 489 — — Total assets $ 489 $ 91,946 $ — Liabilities: Derivative liabilities: Interest rate swaps $ — $ 206 $ — Cash collateral held by counterparty (190 ) — — Total derivative liabilities (included in other liabilities) (190 ) 206 — Total liabilities $ (190 ) $ 206 $ — December 31, 2016 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: U.S. government-sponsored entities $ — $ 4,782 $ — Residential mortgage-backed securities (issued by government-sponsored entities) — 86,703 — Corporate — 3,039 — Small Business Administration loan pools — 223 — State and political subdivisions — 499 — Equity securities 486 — — Derivative assets: Derivative assets (included in other assets) — 1 — Cash collateral held by counterparty 151 — — Total derivative assets 151 1 — Total assets $ 637 $ 95,247 $ — Liabilities: Derivative liabilities: Interest rate swaps (included in other liabilities) $ — $ 39 $ — Cash collateral held by counterparty (39 ) — — Total derivative liabilities (39 ) 39 — Total liabilities $ (39 ) $ 39 $ — There were no material transfers between levels during the six months ended June 30, 2017 or the year ended December 31, 2016. 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, 2017 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 1,675 Commercial and industrial — — 466 Residential real estate — — 3,665 Agricultural real estate — — 359 Other — — 574 Other real estate owned: Commercial real estate — — 2,251 Residential real estate — — 479 December 31, 2016 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 2,236 Commercial and industrial — — 218 Residential real estate — — 2,053 Agricultural real estate — — 21 Other — — 336 Other real estate owned: Commercial real estate — — 2,400 Residential real estate — — 429 The Company did not record any liabilities for which the fair value was measured on a non-recurring basis at June 30, 2017 or at December 31, 2016. 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, 2017 Impaired loans $ 6,739 Sales Approach Adjustments for differences comparable sales 23%-31% (4%) December 31, 2016 Impaired loans $ 4,864 Sales Approach Adjustments for differences comparable sales 7%-26% (9%) 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, 2017 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 24,212 $ 24,212 $ 24,212 $ — $ — Interest bearing deposits 4,241 4,241 — 4,241 — Available-for-sale securities 92,435 92,435 489 91,946 — Held-to-maturity securities 532,159 531,296 — 531,296 — Loans held for sale 3,463 3,463 — 3,463 — Loans, net of allowance for loan losses 1,521,828 1,532,981 — — 1,532,981 Federal Reserve Bank and Federal Home Loan Bank stock 19,795 N/A N/A N/A N/A Interest receivable 9,062 9,062 — 9,062 — Total assets $ 2,207,195 $ 2,197,690 $ 24,701 $ 640,008 $ 1,532,981 Financial liabilities: Deposits $ 1,819,677 $ 1,826,240 $ — $ 1,826,240 $ — Federal funds purchased and retail repurchase agreements 21,069 21,069 — 21,069 — Federal Home Loan Bank advances 257,408 257,408 — 257,408 — Subordinated debentures 13,825 13,825 — 13,825 — Contractual obligations 2,211 2,211 — 2,211 — Interest payable 1,268 1,268 — 1,268 — Derivative liabilities 206 206 — 206 — Cash collateral held by derivative counterparty (190 ) (190 ) (190 ) — — Total derivative liabilities 16 16 (190 ) 206 — Total liabilities $ 2,115,474 $ 2,122,037 $ (190 ) $ 2,122,227 $ — December 31, 2016 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 35,095 $ 35,095 $ 35,095 $ — $ — Interest bearing deposits 3,750 3,750 — 3,750 — Available-for-sale securities 95,732 95,732 486 95,246 — Held-to-maturity securities 465,709 461,156 — 461,156 — Loans held for sale 4,830 4,830 — 4,830 — Loans, net of allowance for loan losses 1,377,173 1,374,700 — — 1,374,700 Federal Reserve Bank and Federal Home Loan Bank stock 16,652 N/A N/A N/A N/A Interest receivable 6,991 6,991 — 6,991 — Derivative assets 1 1 — 1 — Cash collateral held by derivative counterparty 151 151 151 — — Total derivative assets 152 152 151 1 — Total assets $ 2,006,084 $ 1,982,406 $ 35,732 $ 571,974 $ 1,374,700 Financial liabilities: Deposits $ 1,630,451 $ 1,635,881 $ — $ 1,635,881 $ — Federal funds purchased and retail repurchase agreements 20,637 20,637 — 20,637 — Federal Home Loan Bank advances 259,588 259,588 — 259,588 — Subordinated debentures 13,684 13,684 — 13,684 — Contractual obligations 2,504 2,504 — 2,504 — Interest payable 728 728 — 728 — Derivative liabilities 39 39 — 39 — Cash collateral held by derivative counterparty (39 ) (39 ) (39 ) — — Total derivative liabilities — — (39 ) 39 — Total liabilities $ 1,927,592 $ 1,933,022 $ (39 ) $ 1,933,061 $ — 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, 2017
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, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $ 14,393 $ 61,151 $ 24,988 $ 50,362 Mortgage loans in the process of origination 9,321 4,599 7,267 2,696 Unused lines of credit 60,524 82,678 45,251 68,085 The fixed rate loan commitments have interest rates ranging from 3.75% to 6.99% and maturities ranging from 1 month to 122 months. Standby Letters of Credit The contractual amounts of standby letters of credit as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Standby letters of credit $ 4,399 $ 2,799 $ 5,762 $ 2,769

LEGAL MATTERS

LEGAL MATTERS	6 Months Ended
	Jun. 30, 2017
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. 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. At this stage of the litigation it is difficult to estimate any potential loss, however Equity Bank believes it has numerous and meritorious defenses to the claims and anticipates contesting the matter vigorously. The Company currently does not believe that it is probable that this legal matter will result in an unfavorable outcome for the Company or Equity Bank. 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.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	6 Months Ended
	Jun. 30, 2017
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	NOTE 12 – SUBSEQUENT EVENTS On July 14, 2017, the Company entered into an agreement and plan of reorganization with Eastman National Bancshares, Inc. (ENBI). ENBI is the holding company of The Eastman National Bank (Eastman), which has four branch locations in Oklahoma: Ponca City (3) and Newkirk. The transaction is expected to close in the fourth quarter of 2017, subject to customary closing conditions, including the receipt of regulatory approval and the approval of ENBI’s stockholders. In their June 30, 2017, unaudited Consolidated Report of Condition, Eastman reported total assets of $258,130, which included total loans of $183,940 and securities of $62,358. At June 30, 2017, total liabilities of $231,717 were reported by Eastman, which included deposits of $221,120. Eastman reported $3,021 in net income before income taxes for the six months ended June 30, 2017. 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 values of identifiable assets acquired and liabilities assumed. Also on July 14, 2017, the Company entered into an agreement and plan of reorganization with Cache Holdings, Inc. (CHI). CHI is the holding company of Patriot Bank, which has one branch location in Tulsa, Oklahoma. This transaction also is expected to close in the fourth quarter of 2017, subject to customary closing conditions, including the receipt of regulatory approval and the approval of CHI’s stockholders. In their June 30, 2017, unaudited Consolidated Balance Sheets, CHI reported total assets of $346,705, which included total loans of $327,666. At June 30, 2017, total liabilities of $312,462 were reported by CHI, which included deposits of $288,245. CHI reported $3,635 in net income before income taxes for the six months ended June 30, 2017. The Company anticipates there will be goodwill and core deposit intangibles recorded with this acquisition.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
BUSINESS COMBINATIONS	NOTE 13 – BUSINESS COMBINATIONS On March 10, 2017, the Company acquired 100% of the outstanding common shares of Prairie State Bancshares, Inc., based in Hoxie, Kansas, referred to as “Prairie”. Results of operations of Prairie were included in the Company’s results of operations beginning March 11, 2017. There were acquisition-related costs of $926 associated with this merger ($572 on an after-tax basis) that were included in merger expenses in the Company’s income statement for the three and six months ended June 30, 2017. Information necessary to recognize the fair value of assets acquired and liabilities assumed is complete. The fair value of consideration exchanged exceeded the recognized amounts of the identifiable net assets and resulted in goodwill of $5,713. Goodwill resulted from a combination of expected synergies, expansion in western Kansas with the addition of three branch locations, growth opportunities and increases in stock prices after the stock exchange ratios were negotiated. The following table summarizes the consideration paid for Prairie and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date: Fair value of consideration: Common stock $ 15,242 Cash 12,255 27,497 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and due from banks 6,579 Available-for-sale securities 3,427 Held-to-maturity securities 971 Federal Reserve Bank and Federal Home Loan Bank stock 198 Loans 129,997 Premises and equipment 2,424 Core deposit intangible 1,448 Other assets 2,331 Total assets acquired 147,375 Deposits 125,353 Interest payable and other liabilities 238 Total liabilities assumed 125,591 Total identifiable net assets 21,784 Goodwill 5,713 $ 27,497 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 Prairie acquisition as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Contractually required principal $ 123,519 $ 11,430 Non-accretable difference (expected losses) — (2,673 ) Cash flows expected to be collected 123,519 8,757 Accretable yield (2,279 ) — Fair value of acquired loans $ 121,240 $ 8,757 The following table presents the carrying value of the loans acquired in the Prairie acquisition by class, as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Total Commercial real estate $ 9,224 $ 144 $ 9,368 Commercial and industrial 11,203 974 12,177 Residential real estate 137 — 137 Agricultural real estate 25,593 2,960 28,553 Consumer 1,451 — 1,451 Agricultural 73,632 4,679 78,311 Fair value of acquired loans $ 121,240 $ 8,757 $ 129,997

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	6 Months Ended
	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers, In January 2016, FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, In February 2016, FASB issued ASU 2016-02, Leases, In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses, In August 2016, FASB issued accounting standards update No. 2016-15, Statement of Cash Flows (Topic 230). 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

SECURITIES (Tables)

SECURITIES (Tables)	6 Months Ended
	Jun. 30, 2017
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 were as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value June 30, 2017 Available-for-sale securities Residential mortgage-backed securities (issued by government-sponsored entities) $ 92,320 $ 193 $ (1,259 ) $ 91,254 Small Business Administration loan pools 182 11 — 193 State and political subdivisions 496 3 — 499 Equity securities 500 — (11 ) 489 $ 93,498 $ 207 $ (1,270 ) $ 92,435 December 31, 2016 Available-for-sale securities U.S. Government-sponsored entities $ 4,766 $ 16 $ — $ 4,782 Residential mortgage-backed securities (issued by government-sponsored entities) 88,257 93 (1,647 ) 86,703 Corporate 3,000 39 — 3,039 Small Business Administration loan pools 210 13 — 223 State and political subdivisions 499 — — 499 Equity securities 500 — (14 ) 486 $ 97,232 $ 161 $ (1,661 ) $ 95,732
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 were as follows: Amortized Cost Gross Unrecognized Gains Gross Unrecognized Losses Fair Value June 30, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ 998 $ — $ (10 ) $ 988 Residential mortgage-backed (securities issued by government sponsored entities) $ 382,278 $ 1,000 $ (3,371 ) 379,907 Corporate 22,990 445 — 23,435 Small Business Administration loan pools 2,229 8 (6 ) 2,231 State and political subdivisions 123,664 1,802 (731 ) 124,735 $ 532,159 $ 3,255 $ (4,118 ) $ 531,296 December 31, 2016 Held-to-maturity securities U.S. Government-sponsored entities $ 998 $ — $ (33 ) $ 965 Residential mortgage-backed (securities issued by government sponsored entities) 338,749 686 (4,702 ) 334,733 Corporate 12,988 139 (28 ) 13,099 Small Business Administration loan pools 2,398 1 (17 ) 2,382 State and political subdivisions 110,576 1,211 (1,810 ) 109,977 $ 465,709 $ 2,037 $ (6,590 ) $ 461,156
Fair Value and Amortized Cost of Debt Securities by Contractual Maturity	The fair value and amortized cost of debt securities at June 30, 2017, 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 $ 196 $ 196 $ 3,111 $ 3,121 One to five years 300 303 23,434 23,931 Five to ten years — — 46,005 47,194 After ten years 182 193 77,331 77,143 Mortgage-backed securities 92,320 91,254 382,278 379,907 Total debt securities $ 92,998 $ 91,946 $ 532,159 $ 531,296
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 below: Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Proceeds $ 3,083 $ 50,499 $ 6,522 $ 70,957 Gross gains 83 473 96 893 Gross losses — — — — Income tax expense on net realized gains 32 181 37 342
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, 2017 and December 31, 2016: Less Than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss June 30, 2017 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 66,189 $ (1,259 ) $ — $ — $ 66,189 $ (1,259 ) Equity securities — — 489 (11 ) 489 (11 ) Total temporarily impaired securities $ 66,189 $ (1,259 ) $ 489 $ (11 ) $ 66,678 $ (1,270 ) December 31, 2016 Available-for-sale securities Residential mortgage-backed (issued by government-sponsored entities) $ 77,414 $ (1,647 ) $ — $ — $ 77,414 $ (1,647 ) Equity securities — — 486 (14 ) 486 (14 ) Total temporarily impaired securities $ 77,414 $ (1,647 ) $ 486 $ (14 ) $ 77,900 $ (1,661 )
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, 2017 Held-to-maturity securities U.S. Government-sponsored entities $ 989 $ (10 ) $ — $ — $ 989 $ (10 ) Residential mortgage-backed (issued by government-sponsored entities) 286,377 (4,346 ) 10,272 (380 ) 296,649 (4,726 ) Small Business Administration loan pools — — 1,226 (34 ) 1,226 (34 ) State and political subdivisions 41,285 (765 ) — — 41,285 (765 ) Total temporarily impaired securities $ 328,651 $ (5,121 ) $ 11,498 $ (414 ) $ 340,149 $ (5,535 ) December 31, 2016 Held-to-maturity securities U.S. Government-sponsored entities $ 965 $ (33 ) $ — $ — $ 965 $ (33 ) Residential mortgage-backed (issued by government-sponsored entities) 291,003 (5,922 ) 10,801 (426 ) 301,804 (6,348 ) Corporate 5,407 (16 ) 3,166 (28 ) 8,573 (44 ) Small Business Administration loan pools 1,068 (2 ) 1,314 (45 ) 2,382 (47 ) State and political subdivisions 65,220 (2,122 ) — — 65,220 (2,122 ) Total temporarily impaired securities $ 363,663 $ (8,095 ) $ 15,281 $ (499 ) $ 378,944 $ (8,594 )

LOANS AND ALLOWANCE FOR LOAN 24

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Categories of Loans	Categories of loans at June 30, 2017 and December 31, 2016 include: June 30, 2017 December 31, 2016 Commercial real estate $ 640,539 $ 593,108 Commercial and industrial 360,687 348,465 Residential real estate 326,097 338,387 Agricultural real estate 69,371 38,331 Consumer 43,241 40,902 Agricultural 89,461 24,412 Total loans 1,529,396 1,383,605 Allowance for loan losses (7,568 ) (6,432 ) Net loans $ 1,521,828 $ 1,377,173
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, 2017 and 2016: 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 June 30, 2016 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,275 $ 1,563 $ 1,940 $ 41 $ 79 $ 82 $ 5,980 Provision for loan losses 196 16 157 — 182 (19 ) 532 Loans charged-off (190 ) (7 ) (200 ) — (153 ) — (550 ) Recoveries 27 2 20 — 19 — 68 Total ending allowance balance $ 2,308 $ 1,574 $ 1,917 $ 41 $ 127 $ 63 $ 6,030 The following tables present the activity in the allowance for loan losses by class for the six-month periods ended June 30, 2017 and 2016: 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 June 30, 2016 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Beginning balance $ 2,051 $ 1,366 $ 1,824 $ 29 $ 187 $ 49 $ 5,506 Provision for loan losses 449 261 315 35 179 16 1,255 Loans charged-off (224 ) (62 ) (248 ) (23 ) (281 ) (3 ) (841 ) Recoveries 32 9 26 — 42 1 110 Total ending allowance balance $ 2,308 $ 1,574 $ 1,917 $ 41 $ 127 $ 63 $ 6,030
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, 2017 and December 31, 2016: June 30, 2017 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 204 $ 51 $ 358 $ 34 $ 35 $ 28 $ 710 Collectively evaluated for impairment 2,515 2,019 1,592 69 486 116 6,797 Purchase credit impaired loans 5 — 49 6 1 — 61 Total $ 2,724 $ 2,070 $ 1,999 $ 109 $ 522 $ 144 $ 7,568 Loan Balance: Individually evaluated for impairment $ 2,837 $ 1,542 $ 3,979 $ 398 $ 352 $ 292 $ 9,400 Collectively evaluated for impairment 627,923 354,760 320,081 65,255 42,883 85,326 1,496,228 Purchase credit impaired loans 9,779 4,385 2,037 3,718 6 3,843 23,768 Total $ 640,539 $ 360,687 $ 326,097 $ 69,371 $ 43,241 $ 89,461 $ 1,529,396 December 31, 2016 Commercial Real Estate Commercial and Industrial Residential Real Estate Agricultural Real Estate Consumer Agricultural Total Allowance for loan losses: Individually evaluated for impairment $ 270 $ 22 $ 288 $ 2 $ 45 $ — $ 627 Collectively evaluated for impairment 2,150 1,859 1,477 33 221 65 5,805 Purchase credit impaired loans — — — — — — — Total $ 2,420 $ 1,881 $ 1,765 $ 35 $ 266 $ 65 $ 6,432 Loan Balance: Individually evaluated for impairment $ 3,182 $ 550 $ 3,321 $ 834 $ 429 $ 3 $ 8,319 Collectively evaluated for impairment 577,863 344,414 332,962 36,668 40,471 24,409 1,356,787 Purchase credit impaired loans 12,063 3,501 2,104 829 2 — 18,499 Total $ 593,108 $ 348,465 $ 338,387 $ 38,331 $ 40,902 $ 24,412 $ 1,383,605
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, 2017 and December 31, 2016. The recorded investment in loans excludes accrued interest receivable due to immateriality. June 30, 2017 December 31, 2016 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 $ 1,023 $ 1,005 $ — $ 904 $ 676 $ — Commercial and industrial 1,231 1,025 — 510 309 — Residential real estate 648 397 — 1,230 980 — Agricultural real estate 62 62 — 824 812 — Consumer 29 — — 53 51 — Agricultural 12 12 — — — — Subtotal 3,005 2,501 — 3,521 2,828 — With an allowance recorded: Commercial real estate 2,388 1,884 209 4,493 2,506 270 Commercial and industrial 545 517 51 265 240 22 Residential real estate 4,330 4,072 407 2,433 2,341 288 Agricultural real estate 503 399 40 23 23 2 Consumer 458 358 36 449 378 45 Agricultural 280 280 28 3 3 — Subtotal 8,504 7,510 771 7,666 5,491 627 Total $ 11,509 $ 10,011 $ 771 $ 11,187 $ 8,319 $ 627 The tables below present average recorded investment and interest income related to impaired loans for the three months and six months ended June 30, 2017 and 2016. 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, 2017 June 30, 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 1,099 $ — $ 1,464 $ 4 Commercial and industrial 1,034 — 716 — Residential real estate 330 1 652 3 Agricultural real estate 31 12 698 — Consumer — — 14 — Agricultural 7 — 104 1 Subtotal 2,501 13 3,648 8 With an allowance recorded: Commercial real estate 2,229 7 2,036 4 Commercial and industrial 558 — 117 — Residential real estate 3,563 13 911 3 Agricultural real estate 339 — — — Consumer 383 2 217 5 Agricultural 150 — 61 — Subtotal 7,222 22 3,342 12 Total $ 9,723 $ 35 $ 6,990 $ 20 As of and for the six months ended June 30, 2017 June 30, 2016 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Commercial real estate $ 841 $ 7 $ 1,233 $ 4 Commercial and industrial 667 3 845 — Residential real estate 688 1 662 3 Agricultural real estate 437 12 399 — Consumer 26 — 16 — Agricultural 6 — 100 1 Subtotal 2,665 23 3,255 8 With an allowance recorded: Commercial real estate 2,195 9 2,516 4 Commercial and industrial 378 1 109 — Residential real estate 3,207 15 877 3 Agricultural real estate 211 — — — Consumer 368 2 177 5 Agricultural 141 — 35 — Subtotal 6,500 27 3,714 12 Total $ 9,165 $ 50 $ 6,969 $ 20
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, 2017 and December 31, 2016, by portfolio and class of loans: June 30, 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 $ 651 $ 14 $ 250 $ 6,980 $ 632,644 $ 640,539 Commercial and industrial 255 387 — 5,922 354,123 360,687 Residential real estate 18 709 — 4,849 320,521 326,097 Agricultural real estate 26 — — 3,638 65,707 69,371 Consumer 293 91 — 358 42,499 43,241 Agricultural 608 — 21 4,135 84,697 89,461 Total $ 1,851 $ 1,201 $ 271 $ 25,882 $ 1,500,191 $ 1,529,396 December 31, 2016 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 $ 2,955 $ 788 $ — $ 12,258 $ 577,107 $ 593,108 Commercial and industrial 419 — — 4,051 343,995 348,465 Residential real estate 368 847 — 4,285 332,887 338,387 Agricultural real estate — — — 1,664 36,667 38,331 Consumer 303 43 — 432 40,124 40,902 Agricultural 52 — — 3 24,357 24,412 Total $ 4,097 $ 1,678 $ — $ 22,693 $ 1,355,137 $ 1,383,605
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, 2017 and December 31, 2016: June 30, 2017 Unclassified Classified Total Commercial real estate $ 616,362 $ 24,177 $ 640,539 Commercial and industrial 346,510 14,177 360,687 Residential real estate 321,091 5,006 326,097 Agricultural real estate 63,906 5,465 69,371 Consumer 42,871 370 43,241 Agricultural 85,168 4,293 89,461 Total $ 1,475,908 $ 53,488 $ 1,529,396 December 31, 2016 Unclassified Classified Total Commercial real estate $ 576,070 $ 17,038 $ 593,108 Commercial and industrial 341,307 7,158 348,465 Residential real estate 333,298 5,089 338,387 Agricultural real estate 36,190 2,141 38,331 Consumer 40,382 520 40,902 Agricultural 24,134 278 24,412 Total $ 1,351,381 $ 32,224 $ 1,383,605
Schedule of Recorded Investments in Purchase Credit Impaired Loans	The recorded investments in purchase credit impaired loans as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Contractually required principal payments $ 32,584 $ 27,413 Discount (8,816 ) (8,914 ) Recorded investment $ 23,768 $ 18,499

DERIVATIVE FINANCIAL INSTRUME25

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and December 31, 2016: June 30, 2017 December 31, 2016 Notional Amount Derivative Assets Derivative Liabilities Notional Amount Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate swaps $ 17,432 $ — $ 206 $ 15,923 $ — $ 39 Total derivatives designated as hedging relationships 17,432 — 206 15,923 — 39 Derivatives not designated as hedging instruments: Interest rate caps/floors 2,745 — — 2,865 1 — Total derivatives not designated as hedging instruments 2,745 — — 2,865 1 — Total $ 20,177 — 206 $ 18,788 1 39 Cash collateral — (190 ) — (190 ) Netting adjustments — — 151 151 Net amount presented in Balance Sheet $ — $ 16 $ 152 $ —
Summary of Net Gains/ (Losses) on Derivatives and Hedging Activities	For the three-month and six-month periods ended June 30, 2017 and 2016, the Company recorded net gains/(losses) on derivatives and hedging activities: Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 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 ) (1 ) (2 ) Total net gains (losses) related to derivatives not designated as hedging instruments — (1 ) (1 ) (2 ) Net gains (losses) on derivatives and hedging activities $ — $ (1 ) $ (1 ) $ (2 )
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, 2017 and 2016. 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 ) June 30, 2016 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 $ (325 ) $ 325 $ — $ (47 ) Total $ (325 ) $ 325 $ — $ (47 ) 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, 2017 and 2016. 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 ) June 30, 2016 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 $ (850 ) $ 850 $ — $ (86 ) Total $ (850 ) $ 850 $ — $ (86 )

BORROWINGS (Tables)

BORROWINGS (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Schedule of Federal Funds Purchased and Retail Repurchase Agreements	Federal funds purchased and retail repurchase agreements as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Federal funds purchased $ — $ — Retail repurchase agreements 21,069 20,637
Average Daily Balance and Interest Rate of Federal Funds Purchased and Retail Repurchase Agreements	June 30, 2017 December 31, 2016 Year-to-date average daily balance during the period $ 20,133 $ 22,599 Maximum month-end balance during the period $ 22,782 $ 25,382 Weighted average interest rate at period-end 0.25 % 0.27 %
Summary of Federal Home Loan Bank Advances	Federal Home Loan Bank advances as of June 30, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Federal Home Loan Bank line of credit advances $ 257,408 $ 259,588 Federal Home Loan Bank fixed rate term advances — — Total Federal Home Loan Bank advances $ 257,408 $ 259,588

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and December 31, 2016: June 30, 2017 December 31, 2016 Class A common stock – issued 13,290,849 12,393,124 Class A common stock – held in treasury (1,271,043 ) (1,271,043 ) Class A common stock – outstanding 12,019,806 11,122,081 Class B common stock – issued 421,416 793,130 Class B common stock – held in treasury (234,903 ) (234,903 ) Class B common stock – outstanding 186,513 558,227
Components of Accumulated Other Comprehensive Income	Components of accumulated other comprehensive income as of June 30, 2017 and December 31, 2016 were as follows: Available-for- Sale Securities Held-to- Maturity Securities Accumulated Other Comprehensive Income June 30, 2017 Net unrealized or unamortized gains (losses) $ (1,063 ) $ (2,612 ) $ (3,675 ) Tax effect 407 999 1,406 $ (656 ) $ (1,613 ) $ (2,269 ) December 31, 2016 Net unrealized or unamortized gains (losses) $ (1,500 ) $ (2,876 ) $ (4,376 ) Tax effect 574 1,100 1,674 $ (926 ) $ (1,776 ) $ (2,702 )

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and December 31, 2016 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, 2017 Total capital to risk weighted assets Equity Bancshares, Inc. $ 242,616 14.34 % $ 156,517 9.25 % $ 177,667 10.50 % $ N/A N/A Equity Bank 224,162 13.25 % 156,522 9.25 % 177,674 10.50 % 169,213 10.00 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 235,048 13.89 % 122,675 7.25 % 143,826 8.50 % N/A N/A Equity Bank 216,594 12.80 % 122,680 7.25 % 143,831 8.50 % 135,371 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 221,223 13.07 % 97,294 5.75 % 118,445 7.00 % N/A N/A Equity Bank 216,594 12.80 % 97,298 5.75 % 118,449 7.00 % 109,989 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 235,048 10.15 % 92,628 4.00 % 92,628 4.00 % N/A N/A Equity Bank 216,594 9.35 % 92,634 4.00 % 92,634 4.00 % 115,793 5.00 % December 31, 2016 Total capital to risk weighted assets Equity Bancshares, Inc. $ 221,779 14.67 % $ 130,372 8.63 % $ 158,714 10.50 % $ N/A N/A Equity Bank 196,478 13.01 % 130,283 8.63 % 158,606 10.50 % 151,053 10.0 % Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 215,347 14.25 % 100,141 6.63 % 128,483 8.50 % N/A N/A Equity Bank 190,046 12.58 % 100,073 6.63 % 128,395 8.50 % 120,842 8.00 % Common equity Tier 1 capital to risk weighted assets Equity Bancshares, Inc. 201,663 13.34 % 77,468 5.13 % 105,809 7.00 % N/A N/A Equity Bank 190,046 12.58 % 77,415 5.13 % 105,737 7.00 % 98,184 6.50 % Tier 1 leverage to average assets Equity Bancshares, Inc. 215,347 11.81 % 72,920 4.00 % 72,920 4.00 % N/A N/A Equity Bank 190,046 10.42 % 72,924 4.00 % 72,924 4.00 % 91,155 5.00 %

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and 2016: Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 Basic: Net income allocable to common stockholders $ 6,354 $ 2,846 $ 11,218 $ 6,285 Weighted average common shares outstanding 12,205,095 8,216,097 12,010,538 8,213,912 Weighted average vested restricted stock units — — — — Weighted average shares 12,205,095 8,216,097 12,010,538 8,213,912 Basic earnings per common share $ 0.52 $ 0.35 $ 0.93 $ 0.77 Diluted: Net income allocable to common stockholders $ 6,354 $ 2,846 $ 11,218 $ 6,285 Weighted average common shares outstanding for: Basic earnings per common share 12,205,095 8,216,097 12,010,538 8,213,912 Dilutive effects of the assumed exercise of stock options 239,764 113,202 253,618 112,703 Average shares and dilutive potential common shares 12,444,859 8,329,299 12,264,156 8,326,615 Diluted earnings per common share $ 0.51 $ 0.34 $ 0.91 $ 0.75

FAIR VALUE (Tables)

FAIR VALUE (Tables)	6 Months Ended
	Jun. 30, 2017
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 below: June 30, 2017 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: Residential mortgage-backed securities (issued by government-sponsored entities) $ — $ 91,254 $ — Small Business Administration loan pools — 193 — State and political subdivisions — 499 — Equity securities 489 — — Total assets $ 489 $ 91,946 $ — Liabilities: Derivative liabilities: Interest rate swaps $ — $ 206 $ — Cash collateral held by counterparty (190 ) — — Total derivative liabilities (included in other liabilities) (190 ) 206 — Total liabilities $ (190 ) $ 206 $ — December 31, 2016 (Level 1) (Level 2) (Level 3) Assets: Available-for-sale securities: U.S. government-sponsored entities $ — $ 4,782 $ — Residential mortgage-backed securities (issued by government-sponsored entities) — 86,703 — Corporate — 3,039 — Small Business Administration loan pools — 223 — State and political subdivisions — 499 — Equity securities 486 — — Derivative assets: Derivative assets (included in other assets) — 1 — Cash collateral held by counterparty 151 — — Total derivative assets 151 1 — Total assets $ 637 $ 95,247 $ — Liabilities: Derivative liabilities: Interest rate swaps (included in other liabilities) $ — $ 39 $ — Cash collateral held by counterparty (39 ) — — Total derivative liabilities (39 ) 39 — Total liabilities $ (39 ) $ 39 $ —
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, 2017 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 1,675 Commercial and industrial — — 466 Residential real estate — — 3,665 Agricultural real estate — — 359 Other — — 574 Other real estate owned: Commercial real estate — — 2,251 Residential real estate — — 479 December 31, 2016 (Level 1) (Level 2) (Level 3) Impaired loans: Commercial real estate $ — $ — $ 2,236 Commercial and industrial — — 218 Residential real estate — — 2,053 Agricultural real estate — — 21 Other — — 336 Other real estate owned: Commercial real estate — — 2,400 Residential real estate — — 429
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, 2017 Impaired loans $ 6,739 Sales Approach Adjustments for differences comparable sales 23%-31% (4%) December 31, 2016 Impaired loans $ 4,864 Sales Approach Adjustments for differences comparable sales 7%-26% (9%)
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, 2017 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 24,212 $ 24,212 $ 24,212 $ — $ — Interest bearing deposits 4,241 4,241 — 4,241 — Available-for-sale securities 92,435 92,435 489 91,946 — Held-to-maturity securities 532,159 531,296 — 531,296 — Loans held for sale 3,463 3,463 — 3,463 — Loans, net of allowance for loan losses 1,521,828 1,532,981 — — 1,532,981 Federal Reserve Bank and Federal Home Loan Bank stock 19,795 N/A N/A N/A N/A Interest receivable 9,062 9,062 — 9,062 — Total assets $ 2,207,195 $ 2,197,690 $ 24,701 $ 640,008 $ 1,532,981 Financial liabilities: Deposits $ 1,819,677 $ 1,826,240 $ — $ 1,826,240 $ — Federal funds purchased and retail repurchase agreements 21,069 21,069 — 21,069 — Federal Home Loan Bank advances 257,408 257,408 — 257,408 — Subordinated debentures 13,825 13,825 — 13,825 — Contractual obligations 2,211 2,211 — 2,211 — Interest payable 1,268 1,268 — 1,268 — Derivative liabilities 206 206 — 206 — Cash collateral held by derivative counterparty (190 ) (190 ) (190 ) — — Total derivative liabilities 16 16 (190 ) 206 — Total liabilities $ 2,115,474 $ 2,122,037 $ (190 ) $ 2,122,227 $ — December 31, 2016 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 35,095 $ 35,095 $ 35,095 $ — $ — Interest bearing deposits 3,750 3,750 — 3,750 — Available-for-sale securities 95,732 95,732 486 95,246 — Held-to-maturity securities 465,709 461,156 — 461,156 — Loans held for sale 4,830 4,830 — 4,830 — Loans, net of allowance for loan losses 1,377,173 1,374,700 — — 1,374,700 Federal Reserve Bank and Federal Home Loan Bank stock 16,652 N/A N/A N/A N/A Interest receivable 6,991 6,991 — 6,991 — Derivative assets 1 1 — 1 — Cash collateral held by derivative counterparty 151 151 151 — — Total derivative assets 152 152 151 1 — Total assets $ 2,006,084 $ 1,982,406 $ 35,732 $ 571,974 $ 1,374,700 Financial liabilities: Deposits $ 1,630,451 $ 1,635,881 $ — $ 1,635,881 $ — Federal funds purchased and retail repurchase agreements 20,637 20,637 — 20,637 — Federal Home Loan Bank advances 259,588 259,588 — 259,588 — Subordinated debentures 13,684 13,684 — 13,684 — Contractual obligations 2,504 2,504 — 2,504 — Interest payable 728 728 — 728 — Derivative liabilities 39 39 — 39 — Cash collateral held by derivative counterparty (39 ) (39 ) (39 ) — — Total derivative liabilities — — (39 ) 39 — Total liabilities $ 1,927,592 $ 1,933,022 $ (39 ) $ 1,933,061 $ —

COMMITMENTS AND CREDIT RISK (Ta

COMMITMENTS AND CREDIT RISK (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 and December 31, 2016 were as follows: June 30, 2017 December 31, 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $ 14,393 $ 61,151 $ 24,988 $ 50,362 Mortgage loans in the process of origination 9,321 4,599 7,267 2,696 Unused lines of credit 60,524 82,678 45,251 68,085 June 30, 2017 December 31, 2016 Fixed Rate Variable Rate Fixed Rate Variable Rate Standby letters of credit $ 4,399 $ 2,799 $ 5,762 $ 2,769

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
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 Prairie and the amounts of the assets acquired and liabilities assumed recognized at the acquisition date: Fair value of consideration: Common stock $ 15,242 Cash 12,255 27,497 Recognized amounts of identifiable assets acquired and liabilities assumed: Cash and due from banks 6,579 Available-for-sale securities 3,427 Held-to-maturity securities 971 Federal Reserve Bank and Federal Home Loan Bank stock 198 Loans 129,997 Premises and equipment 2,424 Core deposit intangible 1,448 Other assets 2,331 Total assets acquired 147,375 Deposits 125,353 Interest payable and other liabilities 238 Total liabilities assumed 125,591 Total identifiable net assets 21,784 Goodwill 5,713 $ 27,497
Schedule Of Acquisitions By Acquisition At Acquisition Date	The following table presents information about the loans acquired in the Prairie acquisition as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Contractually required principal $ 123,519 $ 11,430 Non-accretable difference (expected losses) — (2,673 ) Cash flows expected to be collected 123,519 8,757 Accretable yield (2,279 ) — Fair value of acquired loans $ 121,240 $ 8,757
Schedule Of Carrying Amounts Of Purchased Loans At Acquisition	The following table presents the carrying value of the loans acquired in the Prairie acquisition by class, as of the date of acquisition: Non-Credit Impaired Purchase Credit Impaired Total Commercial real estate $ 9,224 $ 144 $ 9,368 Commercial and industrial 11,203 974 12,177 Residential real estate 137 — 137 Agricultural real estate 25,593 2,960 28,553 Consumer 1,451 — 1,451 Agricultural 73,632 4,679 78,311 Fair value of acquired loans $ 121,240 $ 8,757 $ 129,997

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Excess income tax benefits associated with stock options exercised		$ 12
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Excess income tax benefits associated with stock options exercised	$ 216
Net income increase due to reduction in provision for income taxes	$ 216
Net income per fully diluted share increase due to reduction in provision for income taxes	$ 0.02

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities Available-for-Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	$ 93,498	$ 97,232
Available-for-Sale, Gross Unrealized Gains	207	161
Available-for-Sale, Gross Unrealized Losses	(1,270)	(1,661)
Available-for-Sale, Fair Value	92,435	95,732
Residential Mortgage-Backed (Securities Issued by Government-Sponsored Entities) [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	92,320	88,257
Available-for-Sale, Gross Unrealized Gains	193	93
Available-for-Sale, Gross Unrealized Losses	(1,259)	(1,647)
Available-for-Sale, Fair Value	91,254	86,703
Small Business Administration Loan Pools [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	182	210
Available-for-Sale, Gross Unrealized Gains	11	13
Available-for-Sale, Fair Value	193	223
State and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	496	499
Available-for-Sale, Gross Unrealized Gains	3
Available-for-Sale, Fair Value	499	499
Equity Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost	500	500
Available-for-Sale, Gross Unrealized Losses	(11)	(14)
Available-for-Sale, Fair Value	$ 489	486
U.S. Government Sponsored Entities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost		4,766
Available-for-Sale, Gross Unrealized Gains		16
Available-for-Sale, Fair Value		4,782
Corporate [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale, Amortized Cost		3,000
Available-for-Sale, Gross Unrealized Gains		39
Available-for-Sale, Fair Value		$ 3,039

Securities - Amortized Cost a35

Securities - Amortized Cost and Fair Value of Securities Held-to-Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	$ 532,159	$ 465,709
Held-to-Maturity, Gross Unrecognized Gains	3,255	2,037
Held-to-Maturity, Gross Unrecognized Losses	(4,118)	(6,590)
Held-to-Maturity, Fair Value	531,296	461,156
U.S. Government Sponsored Entities [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	998	998
Held-to-Maturity, Gross Unrecognized Losses	(10)	(33)
Held-to-Maturity, Fair Value	988	965
Residential Mortgage-Backed (Securities Issued by Government-Sponsored Entities) [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	382,278	338,749
Held-to-Maturity, Gross Unrecognized Gains	1,000	686
Held-to-Maturity, Gross Unrecognized Losses	(3,371)	(4,702)
Held-to-Maturity, Fair Value	379,907	334,733
Corporate [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	22,990	12,988
Held-to-Maturity, Gross Unrecognized Gains	445	139
Held-to-Maturity, Gross Unrecognized Losses		(28)
Held-to-Maturity, Fair Value	23,435	13,099
Small Business Administration Loan Pools [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	2,229	2,398
Held-to-Maturity, Gross Unrecognized Gains	8	1
Held-to-Maturity, Gross Unrecognized Losses	(6)	(17)
Held-to-Maturity, Fair Value	2,231	2,382
State and Political Subdivisions [Member]
Schedule Of Held To Maturity Securities [Line Items]
Held-to-Maturity, Amortized Cost	123,664	110,576
Held-to-Maturity, Gross Unrecognized Gains	1,802	1,211
Held-to-Maturity, Gross Unrecognized Losses	(731)	(1,810)
Held-to-Maturity, Fair Value	$ 124,735	$ 109,977

Securities - Fair Value and Amo

Securities - Fair Value and Amortized Cost of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Investments Debt And Equity Securities [Abstract]
Available-for-Sale, Amortized Cost, Within one year	$ 196
Available-for-Sale, Amortized Cost, One to five years	300
Available-for-Sale, Amortized Cost, After ten years	182
Available-for-Sale, Amortized Cost, Mortgage-backed securities	92,320
Available-for-Sale, Amortized Cost, Total debt securities	92,998
Available-for-Sale, Fair Value, Within one year	196
Available-for-Sale, Fair Value, One to five years	303
Available-for-Sale, Fair Value, After ten years	193
Available-for-Sale, Fair Value, Mortgage-backed securities	91,254
Available-for-Sale, Fair Value, Total debt securities	91,946
Held-to-Maturity, Amortized Cost, Within one year	3,111
Held-to-Maturity, Amortized Cost, One to five years	23,434
Held-to-Maturity, Amortized Cost, Five to ten years	46,005
Held-to-Maturity, Amortized Cost, After ten years	77,331
Held-to-Maturity, Amortized Cost, Mortgage-backed securities	382,278
Held-to-Maturity, Amortized Cost	532,159	$ 465,709
Held-to-Maturity, Fair Value, Within one year	3,121
Held-to-Maturity, Fair Value, One to five years	23,931
Held-to-Maturity, Fair Value, Five to ten years	47,194
Held-to-Maturity, Fair Value, After ten years	77,143
Held-to-Maturity, Fair Value, Mortgage-backed securities	379,907
Held-to-Maturity, Fair Value, Total debt securities	$ 531,296	$ 461,156

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	Jun. 30, 2017USD ($)Security	Dec. 31, 2016USD ($)
Investments Debt And Equity Securities [Abstract]
Carrying value of securities pledged as collateral | $	$ 438,442	$ 439,208
Number of unrealized loss position, available-for-sale securities	19
Number of unrealized loss position, held-to-maturity securities	247

Securities - Summary of Gross U

Securities - Summary of Gross Unrealized Losses and Fair Value of Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Fair Value	$ 66,189	$ 77,414
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Unrealized Loss	(1,259)	(1,647)
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Fair Value	489	486
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Unrealized Loss	(11)	(14)
Total temporarily impaired securities, Available-for-sale securities, Fair Value	66,678	77,900
Total temporarily impaired securities, Available-for-sale securities, Unrealized Loss	(1,270)	(1,661)
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	328,651	363,663
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(5,121)	(8,095)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	11,498	15,281
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(414)	(499)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	340,149	378,944
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(5,535)	(8,594)
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	66,189	77,414
Total temporarily impaired securities, Available-for-sale securities, Less Than 12 Months, Unrealized Loss	(1,259)	(1,647)
Total temporarily impaired securities, Available-for-sale securities, Fair Value	66,189	77,414
Total temporarily impaired securities, Available-for-sale securities, Unrealized Loss	(1,259)	(1,647)
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value	286,377	291,003
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(4,346)	(5,922)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	10,272	10,801
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(380)	(426)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	296,649	301,804
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(4,726)	(6,348)
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	489	486
Total temporarily impaired securities, Available-for-sale securities, 12 Months or More, Unrealized Loss	(11)	(14)
Total temporarily impaired securities, Available-for-sale securities, Fair Value	489	486
Total temporarily impaired securities, Available-for-sale securities, Unrealized Loss	(11)	(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	989	965
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(10)	(33)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	989	965
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(10)	(33)
Corporate [Member]
Schedule Of Available For Sale Securities [Line Items]
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Fair Value		5,407
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss		(16)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value		3,166
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss		(28)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value		8,573
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss		(44)
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		1,068
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss		(2)
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Fair Value	1,226	1,314
Total temporarily impaired securities, Held-to-maturity securities, 12 Months or More, Unrealized Loss	(34)	(45)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	1,226	2,382
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	(34)	(47)
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	41,285	65,220
Total temporarily impaired securities, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss	(765)	(2,122)
Total temporarily impaired securities, Held-to-maturity securities, Fair Value	41,285	65,220
Total temporarily impaired securities, Held-to-maturity securities, Unrealized Loss	$ (765)	$ (2,122)

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, 2016	Jun. 30, 2017	Jun. 30, 2016
Investments Debt And Equity Securities [Abstract]
Proceeds	$ 3,083	$ 50,499	$ 6,522	$ 70,957
Gross gains	83	473	96	893
Income tax expense on net realized gains	$ 32	$ 181	$ 37	$ 342

Loans and Allowance for Loan 40

Loans and Allowance for Loan Losses - Categories of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 1,529,396		$ 1,383,605
Allowance for loan losses	(7,568)	$ (7,048)	(6,432)	$ (6,030)	$ (5,980)	$ (5,506)
Net loans	1,521,828		1,377,173
Commercial Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	640,539		593,108
Allowance for loan losses	(2,724)	(2,592)	(2,420)	(2,308)	(2,275)	(2,051)
Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	360,687		348,465
Allowance for loan losses	(2,070)	(2,059)	(1,881)	(1,574)	(1,563)	(1,366)
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	326,097		338,387
Allowance for loan losses	(1,999)	(1,875)	(1,765)	(1,917)	(1,940)	(1,824)
Agricultural Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	69,371		38,331
Allowance for loan losses	(109)	(66)	(35)	(41)	(41)	(29)
Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	43,241		40,902
Allowance for loan losses	(522)	(391)	(266)	(127)	(79)	(187)
Agricultural [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	89,461		24,412
Allowance for loan losses	$ (144)	$ (65)	$ (65)	$ (63)	$ (82)	$ (49)

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)Loan	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)Loan
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 1,521,828,000		$ 1,521,828,000		$ 1,377,173,000
Provision for loan losses	628,000	$ 532,000	$ 1,723,000	$ 1,255,000
Troubled debt restructurings | Loan			0		0
Consumer Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Over-draft deposit accounts	894,000		$ 894,000		$ 567,000
Purchased Credit Impaired Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Remaining estimated accretable yield	1,920,000		1,920,000		1,063,000
Interest income recognized	699,000	86,000	1,412,000	238,000
Provision for loan losses	8,000	0	61,000	0
Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Mortgage finance loans amount			10,000,000		10,000,000
Provision for loan losses	397,000	$ 16,000	585,000	$ 261,000
Residential Real Estate Loan Pools [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 82,239,000		$ 82,239,000		$ 90,705,000

Loans and Allowance for Loan 42

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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	$ 7,048	$ 5,980	$ 6,432	$ 5,506
Provision for loan losses	628	532	1,723	1,255
Loans charged-off	(710)	(550)	(1,397)	(841)
Recoveries	602	68	810	110
Allowance for Loan Losses, Ending Balance	7,568	6,030	7,568	6,030
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	2,592	2,275	2,420	2,051
Provision for loan losses	(245)	196	(78)	449
Loans charged-off	(29)	(190)	(92)	(224)
Recoveries	406	27	474	32
Allowance for Loan Losses, Ending Balance	2,724	2,308	2,724	2,308
Commercial and Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	2,059	1,563	1,881	1,366
Provision for loan losses	397	16	585	261
Loans charged-off	(409)	(7)	(422)	(62)
Recoveries	23	2	26	9
Allowance for Loan Losses, Ending Balance	2,070	1,574	2,070	1,574
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	1,875	1,940	1,765	1,824
Provision for loan losses	58	157	374	315
Loans charged-off	(27)	(200)	(238)	(248)
Recoveries	93	20	98	26
Allowance for Loan Losses, Ending Balance	1,999	1,917	1,999	1,917
Agricultural Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	66	41	35	29
Provision for loan losses	46		77	35
Loans charged-off	(3)		(3)	(23)
Allowance for Loan Losses, Ending Balance	109	41	109	41
Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	391	79	266	187
Provision for loan losses	298	182	650	179
Loans charged-off	(242)	(153)	(601)	(281)
Recoveries	75	19	207	42
Allowance for Loan Losses, Ending Balance	522	127	522	127
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Beginning Balance	65	82	65	49
Provision for loan losses	74	(19)	115	16
Loans charged-off			(41)	(3)
Recoveries	5		5	1
Allowance for Loan Losses, Ending Balance	$ 144	$ 63	$ 144	$ 63

Loans and Allowance for Loan 43

Loans and Allowance for Loan Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	$ 710		$ 627
Collectively evaluated for impairment, Allowance for loan losses	6,797		5,805
Purchase credit impaired loans, Allowance for loan losses	61		0
Total Allowance for Loan Losses	7,568	$ 7,048	6,432	$ 6,030	$ 5,980	$ 5,506
Individually evaluated for impairment	9,400		8,319
Collectively evaluated for impairment	1,496,228		1,356,787
Purchase credit impaired loans	23,768		18,499
Total Loans	1,529,396		1,383,605
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	204		270
Collectively evaluated for impairment, Allowance for loan losses	2,515		2,150
Purchase credit impaired loans, Allowance for loan losses	5		0
Total Allowance for Loan Losses	2,724	2,592	2,420	2,308	2,275	2,051
Individually evaluated for impairment	2,837		3,182
Collectively evaluated for impairment	627,923		577,863
Purchase credit impaired loans	9,779		12,063
Total Loans	640,539		593,108
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	51		22
Collectively evaluated for impairment, Allowance for loan losses	2,019		1,859
Purchase credit impaired loans, Allowance for loan losses	0		0
Total Allowance for Loan Losses	2,070	2,059	1,881	1,574	1,563	1,366
Individually evaluated for impairment	1,542		550
Collectively evaluated for impairment	354,760		344,414
Purchase credit impaired loans	4,385		3,501
Total Loans	360,687		348,465
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	358		288
Collectively evaluated for impairment, Allowance for loan losses	1,592		1,477
Purchase credit impaired loans, Allowance for loan losses	49		0
Total Allowance for Loan Losses	1,999	1,875	1,765	1,917	1,940	1,824
Individually evaluated for impairment	3,979		3,321
Collectively evaluated for impairment	320,081		332,962
Purchase credit impaired loans	2,037		2,104
Total Loans	326,097		338,387
Agricultural Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	34		2
Collectively evaluated for impairment, Allowance for loan losses	69		33
Purchase credit impaired loans, Allowance for loan losses	6		0
Total Allowance for Loan Losses	109	66	35	41	41	29
Individually evaluated for impairment	398		834
Collectively evaluated for impairment	65,255		36,668
Purchase credit impaired loans	3,718		829
Total Loans	69,371		38,331
Consumer [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	35		45
Collectively evaluated for impairment, Allowance for loan losses	486		221
Purchase credit impaired loans, Allowance for loan losses	1		0
Total Allowance for Loan Losses	522	391	266	127	79	187
Individually evaluated for impairment	352		429
Collectively evaluated for impairment	42,883		40,471
Purchase credit impaired loans	6		2
Total Loans	43,241		40,902
Agricultural [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for impairment, Allowance for loan losses	28
Collectively evaluated for impairment, Allowance for loan losses	116		65
Purchase credit impaired loans, Allowance for loan losses	0		0
Total Allowance for Loan Losses	144	$ 65	65	$ 63	$ 82	$ 49
Individually evaluated for impairment	292		3
Collectively evaluated for impairment	85,326		24,409
Purchase credit impaired loans	3,843
Total Loans	$ 89,461		$ 24,412

Loans and Allowance for Loan 44

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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	$ 3,005		$ 3,005		$ 3,521
With no related allowance recorded, Recorded Investment	2,501		2,501		2,828
With an allowance recorded, Unpaid Principal Balance	8,504		8,504		7,666
With an allowance recorded, Recorded Investment	7,510		7,510		5,491
Allowance for Loan Losses Allocated	771		771		627
Unpaid Principal Balance	11,509		11,509		11,187
Recorded Investment	10,011		10,011		8,319
With no related allowance recorded, Average Recorded Investment	2,501	$ 3,648	2,665	$ 3,255
With no related allowance recorded, Interest Income Recognized	13	8	23	8
With an allowance recorded, Average Recorded Investment	7,222	3,342	6,500	3,714
With an allowance recorded, Interest Income Recognized	22	12	27	12
Average Recorded Investment	9,723	6,990	9,165	6,969
Interest Income Recognized	35	20	50	20
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	1,023		1,023		904
With no related allowance recorded, Recorded Investment	1,005		1,005		676
With an allowance recorded, Unpaid Principal Balance	2,388		2,388		4,493
With an allowance recorded, Recorded Investment	1,884		1,884		2,506
Allowance for Loan Losses Allocated	209		209		270
With no related allowance recorded, Average Recorded Investment	1,099	1,464	841	1,233
With no related allowance recorded, Interest Income Recognized		4	7	4
With an allowance recorded, Average Recorded Investment	2,229	2,036	2,195	2,516
With an allowance recorded, Interest Income Recognized	7	4	9	4
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	1,231		1,231		510
With no related allowance recorded, Recorded Investment	1,025		1,025		309
With an allowance recorded, Unpaid Principal Balance	545		545		265
With an allowance recorded, Recorded Investment	517		517		240
Allowance for Loan Losses Allocated	51		51		22
With no related allowance recorded, Average Recorded Investment	1,034	716	667	845
With no related allowance recorded, Interest Income Recognized			3
With an allowance recorded, Average Recorded Investment	558	117	378	109
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	648		648		1,230
With no related allowance recorded, Recorded Investment	397		397		980
With an allowance recorded, Unpaid Principal Balance	4,330		4,330		2,433
With an allowance recorded, Recorded Investment	4,072		4,072		2,341
Allowance for Loan Losses Allocated	407		407		288
With no related allowance recorded, Average Recorded Investment	330	652	688	662
With no related allowance recorded, Interest Income Recognized	1	3	1	3
With an allowance recorded, Average Recorded Investment	3,563	911	3,207	877
With an allowance recorded, Interest Income Recognized	13	3	15	3
Agricultural Real Estate [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	62		62		824
With no related allowance recorded, Recorded Investment	62		62		812
With an allowance recorded, Unpaid Principal Balance	503		503		23
With an allowance recorded, Recorded Investment	399		399		23
Allowance for Loan Losses Allocated	40		40		2
With no related allowance recorded, Average Recorded Investment	31	698	437	399
With no related allowance recorded, Interest Income Recognized	12		12
With an allowance recorded, Average Recorded Investment	339		211
Consumer [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	29		29		53
With no related allowance recorded, Recorded Investment					51
With an allowance recorded, Unpaid Principal Balance	458		458		449
With an allowance recorded, Recorded Investment	358		358		378
Allowance for Loan Losses Allocated	36		36		45
With no related allowance recorded, Average Recorded Investment		14	26	16
With an allowance recorded, Average Recorded Investment	383	217	368	177
With an allowance recorded, Interest Income Recognized	2	5	2	5
Agricultural [Member]
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Unpaid Principal Balance	12		12
With no related allowance recorded, Recorded Investment	12		12
With an allowance recorded, Unpaid Principal Balance	280		280		3
With an allowance recorded, Recorded Investment	280		280		$ 3
Allowance for Loan Losses Allocated	28		28
With no related allowance recorded, Average Recorded Investment	7	104	6	100
With no related allowance recorded, Interest Income Recognized		1		1
With an allowance recorded, Average Recorded Investment	$ 150	$ 61	$ 141	$ 35

Loans and Allowance for Loan 45

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, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment Past Due [Line Items]
Greater Than 90 Days Past Due Still On Accrual	$ 271
Nonaccrual	25,882	$ 22,693
Loans Not Past Due	1,500,191	1,355,137
Total Loans	1,529,396	1,383,605
30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	1,851	4,097
60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	1,201	1,678
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Greater Than 90 Days Past Due Still On Accrual	250
Nonaccrual	6,980	12,258
Loans Not Past Due	632,644	577,107
Total Loans	640,539	593,108
Commercial Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	651	2,955
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	14	788
Commercial and Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	5,922	4,051
Loans Not Past Due	354,123	343,995
Total Loans	360,687	348,465
Commercial and Industrial [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	255	419
Commercial and Industrial [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	387
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	4,849	4,285
Loans Not Past Due	320,521	332,887
Total Loans	326,097	338,387
Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	18	368
Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	709	847
Agricultural Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	3,638	1,664
Loans Not Past Due	65,707	36,667
Total Loans	69,371	38,331
Agricultural Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	26
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	358	432
Loans Not Past Due	42,499	40,124
Total Loans	43,241	40,902
Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	293	303
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	91	43
Agricultural [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Greater Than 90 Days Past Due Still On Accrual	21
Nonaccrual	4,135	3
Loans Not Past Due	84,697	24,357
Total Loans	89,461	24,412
Agricultural [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivables, Past Due	$ 608	$ 52

Loans and Allowance for Loan 46

Loans and Allowance for Loan Losses - Schedule of Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 1,529,396	$ 1,383,605
Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	1,475,908	1,351,381
Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	53,488	32,224
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	640,539	593,108
Commercial Real Estate [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	616,362	576,070
Commercial Real Estate [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	24,177	17,038
Commercial and Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	360,687	348,465
Commercial and Industrial [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	346,510	341,307
Commercial and Industrial [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	14,177	7,158
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	326,097	338,387
Residential Real Estate [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	321,091	333,298
Residential Real Estate [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,006	5,089
Agricultural Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	69,371	38,331
Agricultural Real Estate [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	63,906	36,190
Agricultural Real Estate [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	5,465	2,141
Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	43,241	40,902
Consumer [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	42,871	40,382
Consumer [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	370	520
Agricultural [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	89,461	24,412
Agricultural [Member] | Unclassified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	85,168	24,134
Agricultural [Member] | Classified [Member]
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 4,293	$ 278

Loans and Allowance for Loan 47

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, 2017	Dec. 31, 2016
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period [Line Items]
Contractually required principal payments	$ 32,584	$ 27,413
Discount	(8,816)	(8,914)
Recorded investment	$ 23,768	$ 18,499

Derivative Financial Instrume48

Derivative Financial Instruments - Additional Information (Detail)	Jun. 30, 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	9 years 1 month 6 days	9 years
Weighted average pay rate	4.93%	4.82%
Weighted average receive rate	3.83%	3.50%
Interest Rate Caps [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Weighted average maturity period	2 years 4 months 24 days	2 years 10 months 25 days

Derivative Financial Instrume49

Derivative Financial Instruments - Summary of Notional Balance and Fair Values of Derivatives Outstanding (Detail) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Notional Amount	$ 20,177,000	$ 18,788,000
Derivative Assets		1,000
Derivative Liabilities	206,000	39,000
Cash collateral, Derivative Assets	0	0
Cash collateral, Derivative Liabilities	(190,000)	(190,000)
Netting adjustments, Derivative Assets		151,000
Netting adjustments, Derivative Liabilities		151,000
Net amount presented in Balance Sheet, Derivative Assets		152,000
Net amount presented in Balance Sheet, Derivative Liabilities	16,000	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	17,432,000	15,923,000
Derivative Liabilities	206,000	39,000
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	17,432,000	15,923,000
Derivative Liabilities	206,000	39,000
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	2,745,000	2,865,000
Derivative Assets		1,000
Not Designated as Hedging Instrument [Member] | Interest Rate Caps/Floors [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 2,745,000	2,865,000
Derivative Assets		$ 1,000

Derivative Financial Instrume50

Derivative Financial Instruments - Summary of Net Gains/ (Losses) on Derivatives and Hedging Activities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivatives designated as hedging instruments:
Total net gain (loss) related to fair value hedge ineffectiveness	$ 0	$ 0	$ 0	$ 0
Derivatives not designated as hedging instruments:
Total net gains (losses) related to derivatives not designated as hedging instruments		(1)	(1)	(2)
Net gains (losses) on derivatives and hedging activities		(1)	(1)	(2)
Interest Rate Swaps [Member]
Derivatives designated as hedging instruments:
Total net gain (loss) related to fair value hedge ineffectiveness	$ 0	0	0	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)	$ (1)	$ (2)

Derivative Financial Instrume51

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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net Fair Value Hedge Ineffectiveness	$ 0	$ 0	$ 0	$ 0
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	(162)	(325)	(93)	(850)
Gain/(Loss) on Hedged Items	162	325	93	850
Net Fair Value Hedge Ineffectiveness	0	0	0	0
Effect of Derivatives on Net Interest Income	(37)	(47)	(84)	(86)
Fair Value Hedging [Member] | Commercial Real Estate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	(162)	(325)	(93)	(850)
Gain/(Loss) on Hedged Items	162	325	93	850
Net Fair Value Hedge Ineffectiveness	0	0	0	0
Effect of Derivatives on Net Interest Income	$ (37)	$ (47)	$ (84)	$ (86)

Borrowings - Schedule of Federa

Borrowings - Schedule of Federal Funds Purchased and Retail Repurchase Agreements (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Federal Funds Purchased And Securities Sold Under Agreements To Repurchase [Abstract]
Federal funds purchased	$ 0	$ 0
Retail repurchase agreements	$ 21,069	$ 20,637

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)	Jan. 28, 2016	Jun. 30, 2017	Jan. 26, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Drawing against Federal Home Loan Bank advances		$ 257,408,000		$ 259,588,000
Line of credit facility maximum borrowing capacity	$ 20,000,000		$ 30,000,000
Debt Instrument, Term	5 years
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.20%
Bank stock loan		$ 0		0
Debt Instrument, Maturity Date Range, End		Mar. 12, 2018
Debt Instrument, Maturity Date Range, Start		Jan. 26, 2017
Federal Home Loan Bank Line of Credit Advances [Member]
Debt Instrument [Line Items]
Drawing against Federal Home Loan Bank advances		$ 257,408,000		$ 259,588,000
Weighted average interest rate on drawings		1.24%		0.72%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity		$ 467,472,000		$ 454,025,000
Line of credit facility additional borrowing capacity		204,561,000		193,674,000
Residential Mortgage-Backed (Securities Issued by Government-Sponsored Entities) [Member]
Debt Instrument [Line Items]
Residential mortgage-backed securities, fair value		$ 21,829,000		$ 23,389,000

Borrowings - Schedule of Borrow

Borrowings - Schedule of Borrowing Usage and Interest Rate (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Year-to-date average daily balance during the period	$ 20,133	$ 22,599
Maximum month-end balance during the period	$ 22,782	$ 25,382
Weighted average interest rate at period-end	0.25%	0.27%

Borrowings - Summary of Federal

Borrowings - Summary of Federal Home Loan Bank Advances (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Federal Home Loan Bank Advances [Line Items]
Total Federal Home Loan Bank advances	$ 257,408	$ 259,588
Federal Home Loan Bank Line of Credit Advances [Member]
Federal Home Loan Bank Advances [Line Items]
Total Federal Home Loan Bank advances	$ 257,408	$ 259,588

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Mar. 10, 2017	May 31, 2015	Jun. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Number of preferred stock shares authorized			10,000,000
Preferred Stock, shares outstanding			0	0
Employee stock loan amount			$ 170	$ 242
Employee stock loan maturity date			Dec. 31, 2016
Employee stock loan interest rate			0.96%
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
Shares issued to employees		203,216
Class A Common Stock [Member] | Prairie State Bancshares, Inc. [Member]
Class of Stock [Line Items]
Shares issued or sold	479,465
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, 2017	Dec. 31, 2016
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock - issued	13,290,849	12,393,124
Common stock - held in treasury	(1,271,043)	(1,271,043)
Common stock - outstanding	12,019,806	11,122,081
Class B Common Stock [Member]
Class of Stock [Line Items]
Common stock - issued	421,416	793,130
Common stock - held in treasury	(234,903)	(234,903)
Common stock - outstanding	186,513	558,227

Stockholders' Equity - Componen

Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ (2,269)	$ (2,702)
Accumulated Net Unrealized Investment Gain (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized or unamortized gains (losses)	(3,675)	(4,376)
Tax effect	1,406	1,674
Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(656)	(926)
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)	(1,063)	(1,500)
Tax effect	407	574
Held to Maturity Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(1,613)	(1,776)
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)	(2,612)	(2,876)
Tax effect	$ 999	$ 1,100

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail)	1 Months Ended	6 Months Ended
	Jan. 31, 2016	Jun. 30, 2017
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, 2017	Dec. 31, 2016
Equity Bancshares, Inc. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Actual Amount	$ 242,616	$ 221,779
Total capital to risk weighted assets, Actual Ratio	14.34%	14.67%
Tier 1 capital to risk weighted assets, Actual Amount	$ 235,048	$ 215,347
Tier 1 capital to risk weighted assets, Actual Ratio	13.89%	14.25%
Common equity Tier 1 capital to risk weighted assets, Actual Amount	$ 221,223	$ 201,663
Common equity Tier 1 capital to risk weighted assets, Actual Ratio	13.07%	13.34%
Tier 1 leverage to average assets, Actual Amount	$ 235,048	$ 215,347
Tier 1 leverage to average assets, Actual Ratio	10.15%	11.81%
Equity Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital to risk weighted assets, Actual Amount	$ 224,162	$ 196,478
Total capital to risk weighted assets, Actual Ratio	13.25%	13.01%
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 169,213	$ 151,053
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	$ 216,594	$ 190,046
Tier 1 capital to risk weighted assets, Actual Ratio	12.80%	12.58%
Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount	$ 135,371	$ 120,842
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	$ 216,594	$ 190,046
Common equity Tier 1 capital to risk weighted assets, Actual Ratio	12.80%	12.58%
Common equity Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount	$ 109,989	$ 98,184
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	$ 216,594	$ 190,046
Tier 1 leverage to average assets, Actual Ratio	9.35%	10.42%
Tier 1 leverage to average assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount	$ 115,793	$ 91,155
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	$ 156,517	$ 130,372
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	9.25%	8.63%
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 122,675	$ 100,141
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	7.25%	6.63%
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 97,294	$ 77,468
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	5.75%	5.13%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 92,628	$ 72,920
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	$ 156,522	$ 130,283
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	9.25%	8.63%
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 122,680	$ 100,073
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	7.25%	6.63%
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 97,298	$ 77,415
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio	5.75%	5.13%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 92,634	$ 72,924
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	$ 177,667	$ 158,714
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 143,826	$ 128,483
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	$ 118,445	$ 105,809
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	$ 92,628	$ 72,920
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	$ 177,674	$ 158,606
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount	$ 143,831	$ 128,395
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	$ 118,449	$ 105,737
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	$ 92,634	$ 72,924
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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic:
Net income allocable to common stockholders	$ 6,354	$ 2,846	$ 11,218	$ 6,285
Weighted average common shares outstanding	12,205,095	8,216,097	12,010,538	8,213,912
Weighted average shares	12,205,095	8,216,097	12,010,538	8,213,912
Basic earnings per common share	$ 0.52	$ 0.35	$ 0.93	$ 0.77
Diluted:
Net income allocable to common stockholders	$ 6,354	$ 2,846	$ 11,218	$ 6,285
Weighted average common shares outstanding for:
Basic earnings per common share	12,205,095	8,216,097	12,010,538	8,213,912
Dilutive effects of the assumed exercise of stock options	239,764	113,202	253,618	112,703
Average shares and dilutive potential common shares	12,444,859	8,329,299	12,264,156	8,326,615
Diluted earnings per common share	$ 0.51	$ 0.34	$ 0.91	$ 0.75

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average outstanding stock options, antidilutive	205,269	128,921	162,986	130,973

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	$ 92,435	$ 95,732
Total assets	2,408,624	2,192,192
Cash collateral held by counterparty		151
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	91,254	86,703
Small Business Administration Loan Pools [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	193	223
State and Political Subdivisions [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	499	499
Equity Securities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	489	486
U.S. Government Sponsored Entities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		4,782
Corporate [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		3,039
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative assets		151
Total assets	489	637
Derivative liabilities		(39)
Cash collateral held by counterparty	(190)	(39)
Total liabilities	(190)	(39)
Cash collateral held by counterparty		151
Cash collateral held by counterparty	(190)	(39)
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities	(190)
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	489	486
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative assets		1
Total assets	91,946	95,247
Derivative liabilities		39
Total liabilities	206	39
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Interest Rate Swaps [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities	206
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities	206
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Interest Rate Swaps [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative liabilities		39
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Assets [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Derivative assets		1
Level 2 [Member] | Fair Value, Measurements, Recurring [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	91,254	86,703
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Small Business Administration Loan Pools [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	193	223
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | State and Political Subdivisions [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities	$ 499	499
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Government Sponsored Entities [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		4,782
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]
Available for sale securities		$ 3,039

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, 2017	Dec. 31, 2016
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	$ 1,675	$ 2,236
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	466	218
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	3,665	2,053
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	359	21
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	574	336
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	2,251	2,400
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	$ 479	$ 429

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
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, 2017	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 6,739	$ 4,864
Valuation Technique	Sales Comparison Approach
Unobservable Input	Adjustments for differences between comparable sales
Weighted average	4.00%	9.00%
Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range	23.00%	7.00%
Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range	31.00%	26.00%

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Estimated Fair Values of Financial Instrument (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 24,212	$ 35,095
Interest bearing deposits	4,241	3,750
Available-for-sale securities	92,435	95,732
Held-to-maturity securities	532,159	465,709
Loans held for sale	3,463	4,830
Loans, net of allowance for loan losses	1,521,828	1,377,173
Federal Reserve Bank and Federal Home Loan Bank stock	19,795	16,652
Interest receivable	9,062	6,991
Derivative Assets		1
Netting adjustments		(151)
Total assets	2,408,624	2,192,192
Deposits	1,819,677	1,630,451
Federal funds purchased and retail repurchase agreements	21,069	20,637
Federal Home Loan Bank advances	257,408	259,588
Subordinated debentures	13,825	13,684
Contractual obligations	2,211	2,504
Derivative Liabilities	206	39
Total liabilities	2,122,566	1,934,228
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	24,212	35,095
Interest bearing deposits	4,241	3,750
Available-for-sale securities	92,435	95,732
Held-to-maturity securities	532,159	465,709
Loans held for sale	3,463	4,830
Loans, net of allowance for loan losses	1,521,828	1,377,173
Federal Reserve Bank and Federal Home Loan Bank stock	19,795	16,652
Interest receivable	9,062	6,991
Derivative Assets		1
Cash collateral held by derivative counterparty		151
Total derivative assets		152
Total assets	2,207,195	2,006,084
Deposits	1,819,677	1,630,451
Federal funds purchased and retail repurchase agreements	21,069	20,637
Federal Home Loan Bank advances	257,408	259,588
Subordinated debentures	13,825	13,684
Contractual obligations	2,211	2,504
Interest payable	1,268	728
Derivative Liabilities	206	39
Cash collateral held by counterparty	(190)	(39)
Total derivative liabilities	16
Total liabilities	2,115,474	1,927,592
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	24,212	35,095
Interest bearing deposits	4,241	3,750
Available-for-sale securities	92,435	95,732
Held-to-maturity securities	531,296	461,156
Loans held for sale	3,463	4,830
Loans, net of allowance for loan losses	1,532,981	1,374,700
Interest receivable	9,062	6,991
Derivative Assets		1
Cash collateral held by derivative counterparty		151
Total derivative assets		152
Total assets	2,197,690	1,982,406
Deposits	1,826,240	1,635,881
Federal funds purchased and retail repurchase agreements	21,069	20,637
Federal Home Loan Bank advances	257,408	259,588
Subordinated debentures	13,825	13,684
Contractual obligations	2,211	2,504
Interest payable	1,268	728
Derivative Liabilities	206	39
Cash collateral held by counterparty	(190)	(39)
Total derivative liabilities	16
Total liabilities	2,122,037	1,933,022
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	24,212	35,095
Available-for-sale securities	489	486
Cash collateral held by derivative counterparty		151
Total derivative assets		151
Total assets	24,701	35,732
Cash collateral held by counterparty	(190)	(39)
Total derivative liabilities	(190)	(39)
Total liabilities	(190)	(39)
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest bearing deposits	4,241	3,750
Available-for-sale securities	91,946	95,246
Held-to-maturity securities	531,296	461,156
Loans held for sale	3,463	4,830
Interest receivable	9,062	6,991
Derivative Assets		1
Total derivative assets		1
Total assets	640,008	571,974
Deposits	1,826,240	1,635,881
Federal funds purchased and retail repurchase agreements	21,069	20,637
Federal Home Loan Bank advances	257,408	259,588
Subordinated debentures	13,825	13,684
Contractual obligations	2,211	2,504
Interest payable	1,268	728
Derivative Liabilities	206	39
Total derivative liabilities	206	39
Total liabilities	2,122,227	1,933,061
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance for loan losses	1,532,981	1,374,700
Total assets	$ 1,532,981	$ 1,374,700

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, 2017	Dec. 31, 2016
Standby Letters of Credit [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	$ 4,399	$ 5,762
Loans commitments, Variable Rate	2,799	2,769
Commitments to Make Loans [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	14,393	24,988
Loans commitments, Variable Rate	61,151	50,362
Mortgage Loans in the Process of Origination [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	9,321	7,267
Loans commitments, Variable Rate	4,599	2,696
Unused Lines of Credit [Member]
Commitments And Contingencies [Line Items]
Loans commitments, Fixed Rate	60,524	45,251
Loans commitments, Variable Rate	$ 82,678	$ 68,085

Commitments and Credit Risk - A

Commitments and Credit Risk - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017
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	6.99%
Fixed interest rate loan commitments maturity period	122 months

Legal Matters - Additional Info

Legal Matters - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Citi Mortgage, Inc [Member]
Loss Contingencies [Line Items]
Loss contingency damages value	$ 2,700

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jul. 14, 2017Branch	Dec. 31, 2016USD ($)
Subsequent Event [Line Items]
Business acquisition/merger agreement date			Jul. 14, 2017
Total assets	$ 2,408,624		$ 2,408,624			$ 2,192,192
Total loans	1,521,828		1,521,828			1,377,173
Total liabilities	2,122,566		2,122,566			1,934,228
Deposits	1,819,677		1,819,677			$ 1,630,451
Net income before income taxes	9,402	$ 4,173	16,313	$ 9,217
Eastman National Bank [Member]
Subsequent Event [Line Items]
Total assets	258,130		258,130
Total loans	183,940		183,940
Securities	62,358		62,358
Total liabilities	231,717		231,717
Deposits	221,120		221,120
Net income before income taxes			3,021
Eastman National Bank [Member] | Subsequent Event [Member] | OKLAHOMA [Member]
Subsequent Event [Line Items]
Number of branches | Branch					4
Patriot Bank [Member] | Subsequent Event [Member] | OKLAHOMA [Member]
Subsequent Event [Line Items]
Number of branches | Branch					1
Cache Holdings, Inc [Member]
Subsequent Event [Line Items]
Total assets	346,705		346,705
Total loans	327,666		327,666
Total liabilities	312,462		312,462
Deposits	$ 288,245		288,245
Net income before income taxes			$ 3,635

Business Combinations - Additio

Business Combinations - Additional Information (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)Branch	Mar. 10, 2017USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Goodwill	$ 64,587	$ 64,587		$ 58,874
Prairie State Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Voting interest acquired			100.00%
Acquisition-related costs	926	926
Acquisition-related costs after tax	572	572
Goodwill	$ 5,713	$ 5,713	$ 5,713
Number of branches acquired | Branch		3

Business Combinations - Summary

Business Combinations - Summary of the Consideration Paid and the Amounts of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Mar. 10, 2017	Jun. 30, 2017	Dec. 31, 2016
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill		$ 64,587	$ 58,874
Prairie State Bancshares, Inc. [Member]
Fair value of consideration:
Common stock	$ 15,242
Cash	12,255
Fair value consideration	27,497
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash and due from banks	6,579
Federal Reserve Bank and Federal Home Loan Bank stock	198
Loans	129,997
Premises and equipment	2,424
Core deposit intangible	1,448
Other assets	2,331
Total assets acquired	147,375
Deposits	125,353
Interest payable and other liabilities	238
Total liabilities assumed	125,591
Total identifiable net assets	21,784
Goodwill	5,713	$ 5,713
Total	27,497
Prairie State Bancshares, Inc. [Member] | Available-for-sale Securities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Held-to maturity/Available-for-sale securities	3,427
Prairie State Bancshares, Inc. [Member] | Held-to-maturity Securities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed:
Held-to maturity/Available-for-sale securities	$ 971

Business Combinations - Informa

Business Combinations - Information about Loans Acquired (Detail) - Prairie State Bancshares, Inc. [Member] $ in Thousands	Mar. 10, 2017USD ($)
Business Acquisition [Line Items]
Fair value of acquired loans	$ 129,997
Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractually required principal	123,519
Cash flows expected to be collected	123,519
Accretable yield	(2,279)
Fair value of acquired loans	121,240
Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Contractually required principal	11,430
Non-accretable difference (expected losses)	(2,673)
Cash flows expected to be collected	8,757
Fair value of acquired loans	$ 8,757

Business Combinations - Carryin

Business Combinations - Carrying Value of Loans Acquired (Detail) - Prairie State Bancshares, Inc. [Member] $ in Thousands	Mar. 10, 2017USD ($)
Business Acquisition [Line Items]
Fair value of acquired loans	$ 129,997
Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	121,240
Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	8,757
Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	9,368
Commercial Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	9,224
Commercial Real Estate [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	144
Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	12,177
Commercial and Industrial [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	11,203
Commercial and Industrial [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	974
Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	137
Residential Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	137
Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	28,553
Agricultural Real Estate [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	25,593
Agricultural Real Estate [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,960
Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,451
Consumer [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,451
Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	78,311
Agricultural [Member] | Non Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	73,632
Agricultural [Member] | Purchase Credit Impaired Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	$ 4,679