Loans and Allowance for Credit Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	$ 9,373	$ 6,549
Collectively evaluated for credit losses	54,872	46,207
Total Allowance for Loan Losses	64,245	52,756	$ 45,824	$ 43,267
Individually evaluated for credit losses	68,915	52,324
Collectively evaluated for credit losses	5,359,360	4,145,856
Total Loans	5,428,275	4,198,180
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	2,903	2,599
Collectively evaluated for credit losses	19,979	17,438
Total Allowance for Loan Losses	22,882	20,037	16,122	14,948
Individually evaluated for credit losses	23,986	18,171
Collectively evaluated for credit losses	2,934,277	2,208,177
Total Loans	2,958,263	2,226,348
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	4,944	2,341
Collectively evaluated for credit losses	18,906	15,489
Total Allowance for Loan Losses	23,850	17,830	13,548	14,005
Individually evaluated for credit losses	33,102	21,905
Collectively evaluated for credit losses	933,947	794,980
Total Loans	967,049	816,885
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	844	910
Collectively evaluated for credit losses	6,857	7,158
Total Allowance for Loan Losses	7,701	8,068	8,827	8,553
Individually evaluated for credit losses	3,623	4,664
Collectively evaluated for credit losses	716,818	577,481
Total Loans	720,441	582,145
Agricultural Real Estate [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	410	342
Collectively evaluated for credit losses	7,255	4,327
Total Allowance for Loan Losses	7,665	4,669	5,158	3,504
Individually evaluated for credit losses	3,928	2,886
Collectively evaluated for credit losses	427,380	276,041
Total Loans	431,308	278,927
Agricultural [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	78	186
Collectively evaluated for credit losses	213	151
Total Allowance for Loan Losses	291	337	356	439
Individually evaluated for credit losses	3,457	3,928
Collectively evaluated for credit losses	245,596	184,547
Total Loans	249,053	188,475
Consumer [Member]
Financing Receivable Impaired [Line Items]
Individually evaluated for credit losses	194	171
Collectively evaluated for credit losses	1,662	1,644
Total Allowance for Loan Losses	1,856	1,815	$ 1,813	$ 1,818
Individually evaluated for credit losses	819	770
Collectively evaluated for credit losses	101,342	104,630
Total Loans	$ 102,161	$ 105,400

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of allowance for credit loss on financing receivable evaluated on collective basis. Excludes financing receivable evaluated on individual basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.5.a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480418/310-10-S99-4

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479391/326-20-30-2

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of allowance for credit loss on financing receivable evaluated on individual basis. Excludes financing receivable evaluated on collective basis.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of financing receivable collectively evaluated for credit loss. Excludes financing receivable individually evaluated for credit loss.

+ References

+ Details

Name:	us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable individually evaluated for credit loss. Excludes financing receivable collectively evaluated for credit loss.

+ References

+ Details

Name:	us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=eqbk_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=eqbk_AgriculturalRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=eqbk_AgriculturalPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: