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 of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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- Definition

Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

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Loans and Allowance for Loan Losses - Acquired Loans with Credit Deterioration (Details) - USD ($)	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 3,160,900,000		$ 2,666,616,000
Allowance for loan losses	(38,381,000)	$ (32,876,000)	(26,911,000)	$ (26,359,000)	$ (26,704,000)	$ (26,189,000)
Carrying amount, net of allowance	3,160,900,000		2,666,616,000
Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			4,951,000
Allowance for loan losses			(365,000)
Carrying amount, net of allowance			4,586,000
Financial Asset Acquired with Credit Deterioration \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			4,951,000
Construction and Land Development \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(2,358,000)	(1,620,000)	(1,146,000)	(739,000)	(552,000)	(561,000)
Construction and Land Development \| Financial Asset Acquired with Credit Deterioration \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			256,000
Agricultural \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(1,634,000)	(1,335,000)	(1,093,000)	(1,284,000)	(1,282,000)	(1,246,000)
Agricultural \| Financial Asset Acquired with Credit Deterioration \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			0
Residential Properties \| Real Estate Loan \| 1-4 Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	(2,486,000)	(1,931,000)	(1,386,000)	(1,649,000)	(1,341,000)	(1,504,000)
Residential Properties \| Financial Asset Acquired with Credit Deterioration \| Real Estate Loan \| 1-4 Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			371,000
Residential Properties \| Financial Asset Acquired with Credit Deterioration \| Real Estate Loan \| Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			2,077,000
Commercial \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ (16,272,000)	$ (13,621,000)	(11,198,000)	$ (10,796,000)	$ (10,565,000)	$ (11,102,000)
Commercial \| Financial Asset Acquired with Credit Deterioration \| Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount			$ 2,247,000