Nature of Operations and Summary of Significant Accounting Policies - Impact of adopting ASU 2016-13 (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021
Loans, net of unearned fees		$ 4,528,234			$ 4,256,213
Allowance for credit losses on loans	[1]	55,817	$ 55,231		58,375
Loans, net of the allowance for credit losses on loans		4,472,417			4,197,838
Allowance for credit losses on off-balance sheet exposures		5,320	4,875		0
Retained earnings		176,868			147,099
Previously Reported
Loans, net of unearned fees				$ 4,269,620
Net deferred loan fees and costs				13,407
Allowance for credit losses on loans				58,375
Loans, net of the allowance for credit losses on loans				4,197,838
Deferred tax asset				14,474
Allowance for credit losses on off-balance sheet exposures				0
Retained earnings				147,099
Commercial and Industrial
Loans, net of unearned fees		812,411			843,024
Allowance for credit losses on loans		10,920	9,981		20,352
Allowance for credit losses on off-balance sheet exposures		63	66		0
Commercial and Industrial | Previously Reported
Loans, net of unearned fees				1,401,681
Commercial and Industrial lines of credit
Loans, net of unearned fees		787,664			617,398
Allowance for credit losses on loans		11,267	9,361		0
Allowance for credit losses on off-balance sheet exposures		0	153		0
Commercial and Industrial lines of credit | Previously Reported
Loans, net of unearned fees				0
Energy
Loans, net of unearned fees		233,000			278,579
Allowance for credit losses on loans		6,428	7,507		9,229
Allowance for credit losses on off-balance sheet exposures		470	258		0
Energy | Previously Reported
Loans, net of unearned fees				278,860
Commercial real estate
Loans, net of unearned fees		1,435,893			1,278,479
Allowance for credit losses on loans		17,042	18,628		19,119
Allowance for credit losses on off-balance sheet exposures		657	753		0
Commercial real estate | Previously Reported
Loans, net of unearned fees				1,281,095
Construction and land development
Loans, net of unearned fees		584,415			574,852
Allowance for credit losses on loans		3,918	3,678		3,749
Allowance for credit losses on off-balance sheet exposures		4,016	3,514		0
Construction and land development | Previously Reported
Loans, net of unearned fees				578,758
Residential real estate
Loans, net of unearned fees		371,337			360,046
Allowance for credit losses on loans		3,134	3,089		5,598
Allowance for credit losses on off-balance sheet exposures		4	4		0
Residential real estate | Previously Reported
Loans, net of unearned fees				600,816
Multifamily real estate
Loans, net of unearned fees		249,641			240,230
Allowance for credit losses on loans		2,427	2,342		0
Allowance for credit losses on off-balance sheet exposures		109	116		0
Multifamily real estate | Previously Reported
Loans, net of unearned fees				0
Paycheck Protection Program ("PPP") | Previously Reported
Loans, net of unearned fees				64,805
Consumer
Loans, net of unearned fees		53,873			63,605
Allowance for credit losses on loans		681	645		328
Allowance for credit losses on off-balance sheet exposures		$ 1	$ 11		0
Consumer | Previously Reported
Loans, net of unearned fees				63,605
As Reported under ASU 2016-13
Loans, net of unearned fees				4,256,213
Net deferred loan fees and costs				0
Allowance for credit losses on loans				56,628
Loans, net of the allowance for credit losses on loans				4,199,585
Deferred tax asset				13,647
Allowance for credit losses on off-balance sheet exposures				5,184
Retained earnings				144,489
As Reported under ASU 2016-13 | Commercial and Industrial
Loans, net of unearned fees				843,024
As Reported under ASU 2016-13 | Commercial and Industrial lines of credit
Loans, net of unearned fees				617,398
As Reported under ASU 2016-13 | Energy
Loans, net of unearned fees				278,579
As Reported under ASU 2016-13 | Commercial real estate
Loans, net of unearned fees				1,278,479
As Reported under ASU 2016-13 | Construction and land development
Loans, net of unearned fees				574,852
As Reported under ASU 2016-13 | Residential real estate
Loans, net of unearned fees				360,046
As Reported under ASU 2016-13 | Multifamily real estate
Loans, net of unearned fees				240,230
As Reported under ASU 2016-13 | Paycheck Protection Program ("PPP")
Loans, net of unearned fees				0
As Reported under ASU 2016-13 | Consumer
Loans, net of unearned fees				63,605
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13
Loans, net of unearned fees				(13,407)
Net deferred loan fees and costs				(13,407)
Allowance for credit losses on loans				(1,747)	(1,747)
Loans, net of the allowance for credit losses on loans				1,747
Deferred tax asset				(827)
Allowance for credit losses on off-balance sheet exposures				5,184	5,184
Retained earnings				(2,610)
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Commercial and Industrial
Loans, net of unearned fees				(558,657)
Allowance for credit losses on loans					(10,213)
Allowance for credit losses on off-balance sheet exposures					107
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Commercial and Industrial lines of credit
Loans, net of unearned fees				617,398
Allowance for credit losses on loans					8,866
Allowance for credit losses on off-balance sheet exposures					44
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Energy
Loans, net of unearned fees				(281)
Allowance for credit losses on loans					(39)
Allowance for credit losses on off-balance sheet exposures					265
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Commercial real estate
Loans, net of unearned fees				(2,616)
Allowance for credit losses on loans					(186)
Allowance for credit losses on off-balance sheet exposures					711
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Construction and land development
Loans, net of unearned fees				(3,906)
Allowance for credit losses on loans					(83)
Allowance for credit losses on off-balance sheet exposures					3,914
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Residential real estate
Loans, net of unearned fees				(240,770)
Allowance for credit losses on loans					(2,552)
Allowance for credit losses on off-balance sheet exposures					5
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Multifamily real estate
Loans, net of unearned fees				240,230
Allowance for credit losses on loans					2,465
Allowance for credit losses on off-balance sheet exposures					137
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Paycheck Protection Program ("PPP")
Loans, net of unearned fees				(64,805)
Cumulative Effect, Period of Adoption, Adjustment | As Reported under ASU 2016-13 | Consumer
Loans, net of unearned fees				$ 0
Allowance for credit losses on loans					(5)
Allowance for credit losses on off-balance sheet exposures					$ 1

[1] As of December 31, 2021, this line represents the allowance for loan and   lease losses. See further discussion in “Note 1: Nature of Operations and Summary of Significant Accounting Policies” in the Notes to Condensed Consolidated Financial Statements (unaudited).