Loans Held for Investment - Non-accrual Loans (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) item	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Non-accrual loans
Non-accrual Loans With Allowance	$ 16,126,000		$ 16,126,000		$ 20,934,000
Non-accrual Loans With No Allowance	13,552,000		13,552,000		26,378,000
Non-accrual loans	29,678,000		29,678,000		47,312,000
Interest Income Recognized	$ 1,224,000	$ 1,410,000	$ 4,165,000	$ 4,196,000
Number of loan relationships	3		3
Decrease in non-accrual status loans			$ 17,600,000
Number of non-accrual loan additions during the period | item			1
Amount of non-accrual loans increase during the period, including loans previously categorized			$ 2,700,000
Commercial real estate | Non-owner occupied
Non-accrual loans
Non-accrual Loans With Allowance	$ 1,171,000		1,171,000		413,000
Non-accrual Loans With No Allowance	95,000		95,000		1,853,000
Non-accrual loans	1,266,000		1,266,000		2,266,000
Interest Income Recognized	265,000	76,000	422,000	204,000
Decrease in non-accrual status loans			1,000,000.0
Commercial real estate | Owner occupied
Non-accrual loans
Non-accrual Loans With Allowance	3,469,000		3,469,000		3,058,000
Non-accrual Loans With No Allowance					1,277,000
Non-accrual loans	3,469,000		3,469,000		4,335,000
Interest Income Recognized	88,000	345,000	505,000	574,000
Commercial and industrial
Non-accrual loans
Non-accrual Loans With Allowance	10,745,000		10,745,000		16,536,000
Non-accrual Loans With No Allowance	1,333,000		1,333,000		5,942,000
Non-accrual loans	12,078,000		12,078,000		22,478,000
Interest Income Recognized	303,000	179,000	930,000	653,000
Decrease in non-accrual status loans			10,400,000
Construction and Land Development
Non-accrual loans
Non-accrual Loans With Allowance	1,000		1,000		2,000
Non-accrual loans	1,000		1,000		2,000
Interest Income Recognized	7,000	13,000	22,000	48,000
1 - 4 family residential
Non-accrual loans
Non-accrual Loans With Allowance	724,000		724,000		902,000
Non-accrual Loans With No Allowance	12,124,000		12,124,000		17,306,000
Non-accrual loans	12,848,000		12,848,000		18,208,000
Interest Income Recognized	561,000	796,000	2,286,000	2,837,000
Decrease in non-accrual status loans			5,400,000
1 - 4 family residential | Secured by Residential Properties [Member]
Non-accrual loans
Non-accrual loans held for sale	4,100,000		4,100,000		2,900,000
Consumer
Non-accrual loans
Non-accrual Loans With Allowance	16,000		16,000		23,000
Non-accrual loans	$ 16,000		$ 16,000		$ 23,000
Interest Income Recognized		$ 1,000		$ (120,000)