Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 155,233	$ 135,953	$ 127,222
Provision for (benefit from) loan losses	3,000	23,100	6,050
Noninterest income:
Service charges on deposit accounts	12,504	9,630	11,104
Credit and debit card fees	9,596	7,994	7,785
Trust and investment advisory fees	7,795	5,201	3,768
(Loss) income from mortgage banking services, net	86,410	122,174	42,992
Other noninterest income	7,939	3,386	5,318
Total noninterest income	124,244	148,385	70,967
Noninterest expense:
Salary and employee benefits	151,926	139,980	104,699
Occupancy and equipment	26,565	26,716	23,439
Other noninterest expenses	46,144	37,377	42,062
Total noninterest expense	224,635	204,073	170,200
Income before income taxes	51,842	57,165	21,939
Other Information
Depreciation expense	6,118	6,004	5,356
Identifiable assets	5,666,814	4,995,457	4,185,443
Operating Segments | Banking
Segment Reporting Information [Line Items]
Net interest income (expense)	152,515	132,130	124,246
Provision for (benefit from) loan losses	3,235	23,329	4,895
Noninterest income:
Service charges on deposit accounts	12,504	9,630	11,104
Credit and debit card fees	9,596	7,994	7,785
Trust and investment advisory fees	7,795	5,201	3,768
(Loss) income from mortgage banking services, net	(2,409)	(2,123)	(1,805)
Other noninterest income	7,946	3,407	5,394
Total noninterest income	35,432	24,109	26,246
Noninterest expense:
Salary and employee benefits	95,064	86,306	72,153
Occupancy and equipment	23,495	23,428	19,932
Other noninterest expenses	31,360	25,203	29,902
Total noninterest expense	149,919	134,937	121,987
Income before income taxes	34,793	(2,027)	23,610
Other Information
Depreciation expense	5,728	5,623	5,027
Identifiable assets	5,058,281	4,463,545	3,761,014
Operating Segments | Mortgage Operations
Segment Reporting Information [Line Items]
Net interest income (expense)	7,270	7,335	5,458
Provision for (benefit from) loan losses	(235)	(229)	1,155
Noninterest income:
Service charges on deposit accounts	0	0	0
Credit and debit card fees	0	0	0
Trust and investment advisory fees	0	0	0
(Loss) income from mortgage banking services, net	88,819	124,297	44,797
Other noninterest income	(7)	(21)	(76)
Total noninterest income	88,812	124,276	44,721
Noninterest expense:
Salary and employee benefits	55,557	52,628	31,698
Occupancy and equipment	3,067	3,284	3,502
Other noninterest expenses	12,341	12,110	9,646
Total noninterest expense	70,965	68,022	44,846
Income before income taxes	25,352	63,818	4,178
Other Information
Depreciation expense	390	381	329
Identifiable assets	573,552	495,473	404,096
Corporate
Segment Reporting Information [Line Items]
Net interest income (expense)	(4,552)	(3,512)	(2,482)
Provision for (benefit from) loan losses	0	0	0
Noninterest income:
Service charges on deposit accounts	0	0	0
Credit and debit card fees	0	0	0
Trust and investment advisory fees	0	0	0
(Loss) income from mortgage banking services, net	0	0	0
Other noninterest income	0	0	0
Total noninterest income	0	0	0
Noninterest expense:
Salary and employee benefits	1,305	1,046	848
Occupancy and equipment	3	4	5
Other noninterest expenses	2,443	64	2,514
Total noninterest expense	3,751	1,114	3,367
Income before income taxes	(8,303)	(4,626)	(5,849)
Other Information
Depreciation expense	0	0	0
Identifiable assets	$ 34,981	$ 36,439	$ 20,333