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.

No definition available.

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- Definition

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

+ References

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- Definition

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

+ References

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

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Loans Receivable - Summary of Various Categories of Loans Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 14,424,728	$ 14,409,480
Allowance for credit losses	(288,234)	(289,669)	$ (236,714)	$ (245,473)
Loans receivable, net	14,136,494	14,119,811
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	8,168,157	8,114,140
Commercial real estate loans \| Non-farm/non-residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	5,549,954	5,632,063
Commercial real estate loans \| Construction/ Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,293,047	2,135,266
Allowance for credit losses	(33,877)	(32,243)	(28,415)	(32,861)
Commercial real estate loans \| Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	325,156	346,811
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	(55,860)	(50,963)	(48,458)	(53,216)
Residential Real Estate \| Residential 1-4 family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,844,260	1,748,551
Residential Real Estate \| Multifamily residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	435,736	578,052
Total real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	10,448,153	10,440,743
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,153,690	1,149,896
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,324,991	2,349,263
Allowance for credit losses	(92,810)	(89,354)	$ (53,062)	$ (46,530)
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	307,327	285,235
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 190,567	$ 184,343