Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net interest income (loss)	$ 73,410	$ 68,486	$ 221,362	$ 168,356
Provision for (benefit from) credit losses	3,890	3,750	11,672	12,450
Noninterest income:
Service charges on deposit accounts	5,475	4,807	15,848	13,111
Credit and debit card fees	2,996	3,103	9,034	8,508
Trust and investment advisory fees	1,398	1,552	4,337	5,408
Income from mortgage banking services, net	7,413	13,785	26,501	40,017
Other noninterest income	1,368	1,706	6,151	3,904
Total noninterest income	18,650	24,953	61,871	70,948
Noninterest expense:
Salary and employee benefits	33,968	32,508	103,073	101,981
Occupancy and equipment	8,216	8,216	24,338	22,802
Other noninterest expenses	13,992	14,824	43,074	58,900
Total noninterest expense	56,176	55,548	170,485	183,683
Income (loss) before income taxes	31,994	34,141	101,076	43,171
Other Information
Depreciation expense	1,624	1,920	5,047	5,305
Identifiable assets	7,756,875	7,052,917	7,756,875	7,052,917	$ 7,430,322
Operating Segments | Banking
Segment Reporting Information [Line Items]
Net interest income (loss)	73,496	68,159	220,608	167,606
Provision for (benefit from) credit losses	6,319	3,223	12,382	9,853
Noninterest income:
Service charges on deposit accounts	5,475	4,807	15,848	13,111
Credit and debit card fees	2,996	3,103	9,033	8,508
Trust and investment advisory fees	1,398	1,552	4,337	5,408
Income from mortgage banking services, net	(526)	(701)	(1,126)	(1,972)
Other noninterest income	1,368	1,706	6,151	3,913
Total noninterest income	10,711	10,467	34,243	28,968
Noninterest expense:
Salary and employee benefits	27,701	23,210	81,667	69,880
Occupancy and equipment	7,449	7,190	22,105	19,937
Other noninterest expenses	9,990	11,146	30,293	46,203
Total noninterest expense	45,140	41,546	134,065	136,020
Income (loss) before income taxes	32,748	33,857	108,404	50,701
Other Information
Depreciation expense	1,567	1,839	4,870	5,011
Identifiable assets	6,824,853	6,315,984	6,824,853	6,315,984
Operating Segments | Mortgage Operations
Segment Reporting Information [Line Items]
Net interest income (loss)	1,171	1,492	4,532	5,193
Provision for (benefit from) credit losses	(2,429)	527	(710)	2,597
Noninterest income:
Service charges on deposit accounts	0	0	0	0
Credit and debit card fees	0	0	1	0
Trust and investment advisory fees	0	0	0	0
Income from mortgage banking services, net	7,939	14,486	27,627	41,989
Other noninterest income	0	0	0	(9)
Total noninterest income	7,939	14,486	27,628	41,980
Noninterest expense:
Salary and employee benefits	5,844	8,922	19,868	30,854
Occupancy and equipment	707	988	2,088	2,826
Other noninterest expenses	3,820	3,314	11,155	10,439
Total noninterest expense	10,371	13,224	33,111	44,119
Income (loss) before income taxes	1,168	2,227	(241)	457
Other Information
Depreciation expense	57	81	177	294
Identifiable assets	871,032	693,473	871,032	693,473
Corporate
Segment Reporting Information [Line Items]
Net interest income (loss)	(1,257)	(1,165)	(3,778)	(4,443)
Provision for (benefit from) credit losses	0	0	0	0
Noninterest income:
Service charges on deposit accounts	0	0	0	0
Credit and debit card fees	0	0	0	0
Trust and investment advisory fees	0	0	0	0
Income from mortgage banking services, net	0	0	0	0
Other noninterest income	0	0	0	0
Total noninterest income	0	0	0	0
Noninterest expense:
Salary and employee benefits	423	376	1,538	1,247
Occupancy and equipment	60	38	145	39
Other noninterest expenses	182	364	1,626	2,258
Total noninterest expense	665	778	3,309	3,544
Income (loss) before income taxes	(1,922)	(1,943)	(7,087)	(7,987)
Other Information
Depreciation expense	0	0	0	0
Identifiable assets	$ 60,990	$ 43,460	$ 60,990	$ 43,460