Loans and Allowance for Loan Losses ("ALLL") - Loan Aging Analysis - Previous GAAP (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Financing Receivable, Past Due [Line Items]
Loans	$ 4,269,620
Loans >= 90 Days and Accruing	90
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,671
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,858
90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	5,681
Total past due
Financing Receivable, Past Due [Line Items]
Loans	9,210
Current
Financing Receivable, Past Due [Line Items]
Loans	4,260,410
Commercial
Financing Receivable, Past Due [Line Items]
Loans	1,401,681
Loans >= 90 Days and Accruing	90
Commercial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	183
Commercial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	499
Commercial | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	1,037
Commercial | Total past due
Financing Receivable, Past Due [Line Items]
Loans	1,719
Commercial | Current
Financing Receivable, Past Due [Line Items]
Loans	1,399,962
Energy
Financing Receivable, Past Due [Line Items]
Loans	278,860
Loans >= 90 Days and Accruing	0
Energy | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Energy | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Energy | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	4,644
Energy | Total past due
Financing Receivable, Past Due [Line Items]
Loans	4,644
Energy | Current
Financing Receivable, Past Due [Line Items]
Loans	274,216
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,281,095
Loans >= 90 Days and Accruing	0
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	85
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	992
Commercial real estate | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	0
Commercial real estate | Total past due
Financing Receivable, Past Due [Line Items]
Loans	1,077
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	1,280,018
Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	578,758
Loans >= 90 Days and Accruing	0
Construction and land development | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	966
Construction and land development | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	117
Construction and land development | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	0
Construction and land development | Total past due
Financing Receivable, Past Due [Line Items]
Loans	1,083
Construction and land development | Current
Financing Receivable, Past Due [Line Items]
Loans	577,675
Residential and Multifamily Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Loans	600,816
Loans >= 90 Days and Accruing	0
Residential and Multifamily Real Estate [Member] | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	437
Residential and Multifamily Real Estate [Member] | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	151
Residential and Multifamily Real Estate [Member] | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	0
Residential and Multifamily Real Estate [Member] | Total past due
Financing Receivable, Past Due [Line Items]
Loans	588
Residential and Multifamily Real Estate [Member] | Current
Financing Receivable, Past Due [Line Items]
Loans	600,228
Paycheck Protection Program ("PPP")
Financing Receivable, Past Due [Line Items]
Loans	64,805
Loans >= 90 Days and Accruing	0
Paycheck Protection Program ("PPP") | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Paycheck Protection Program ("PPP") | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Paycheck Protection Program ("PPP") | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	0
Paycheck Protection Program ("PPP") | Total past due
Financing Receivable, Past Due [Line Items]
Loans	0
Paycheck Protection Program ("PPP") | Current
Financing Receivable, Past Due [Line Items]
Loans	64,805
Consumer
Financing Receivable, Past Due [Line Items]
Loans	63,605
Loans >= 90 Days and Accruing	0
Consumer | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0
Consumer | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	99
Consumer | 90 Days or More
Financing Receivable, Past Due [Line Items]
Loans	0
Consumer | Total past due
Financing Receivable, Past Due [Line Items]
Loans	99
Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	$ 63,506