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Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | $ 47,089 | $ 69,998
Real Estate Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 37,176 | 23,554
Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 40,703
Other Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 9,913 | 5,741
Real Estate | Construction and development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 2,489 | 1,539
Real Estate | Construction and development | Real Estate Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 2,489 | 1,539
Real Estate | Construction and development | Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 0
Real Estate | Construction and development | Other Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 0
Real Estate | Single family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 1,838 | 6,950
Real Estate | Single family residential | Real Estate Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 1,838 | 6,950
Real Estate | Single family residential | Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 0
Real Estate | Single family residential | Other Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 0
Real Estate | Other commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 32,849 | 46,444
Real Estate | Other commercial | Real Estate Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 32,849 | 0
Real Estate | Other commercial | Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 40,703
Real Estate | Other commercial | Other Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 5,741
Commercial | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 9,913 | 15,065
Commercial | Commercial | Real Estate Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 15,065
Commercial | Commercial | Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | 0 | 0
Commercial | Commercial | Other Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, collateral dependent, amount | $ 9,913 | $ 0

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