Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Goodwill and other intangibles	$ 101,666				$ 102,606				$ 101,666	$ 102,606
Total assets	4,082,200				4,142,749				4,082,200	4,142,749
Net interest income	29,432	$ 31,781	$ 31,711	$ 31,242	29,699	$ 26,534	$ 26,490	$ 25,267	124,166	107,990	$ 96,191
Provision for credit/loan losses and unfunded loans									1,122	4,893	9,100
Service fees, security gains and other noninterest income									44,202	38,193	36,161
Noninterest expense									89,512	75,637	69,858
Amortization and depreciation expense									4,899	3,539	3,122
INCOME BEFORE INCOME TAXES	16,121	18,761	19,111	18,842	6,210	19,369	18,878	17,657	72,835	62,114	50,272
Income tax	2,765	3,315	3,160	2,998	508	3,358	3,303	3,101	12,238	10,270	8,396
NET INCOME	13,356	$ 15,446	$ 15,951	$ 15,844	5,702	$ 16,011	$ 15,575	$ 14,556	60,597	51,844	41,876
Eliminations And Others
Segment Reporting Information [Line Items]
Goodwill and other intangibles	(4,263)				(4,263)				(4,263)	(4,263)
Total assets	3,705				3,854				3,705	3,854
Net interest income									(3,359)	(870)	(295)
Provision for credit/loan losses and unfunded loans									0	0	0
Service fees, security gains and other noninterest income									(637)	(199)	(381)
Noninterest expense									890	589	1,206
Amortization and depreciation expense									453	346	252
INCOME BEFORE INCOME TAXES									(5,339)	(2,004)	(2,134)
Income tax									(1,340)	(605)	(583)
NET INCOME									(3,999)	(1,399)	(1,551)
Trust Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	5,739				5,814				5,739	5,814
Total assets	14,383				14,365				14,383	14,365
Net interest income									172	134	125
Provision for credit/loan losses and unfunded loans									0	0	0
Service fees, security gains and other noninterest income									19,535	11,045	9,353
Noninterest expense									8,635	6,854	5,963
Amortization and depreciation expense									110	262	304
INCOME BEFORE INCOME TAXES									10,962	4,063	3,211
Income tax									2,301	852	674
NET INCOME									8,661	3,211	2,537
Bank Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	100,190				101,055				100,190	101,055
Total assets	$ 4,064,112				$ 4,124,530				4,064,112	4,124,530
Net interest income									127,353	108,726	96,361
Provision for credit/loan losses and unfunded loans									1,122	4,893	9,100
Service fees, security gains and other noninterest income									25,304	27,347	27,189
Noninterest expense									79,987	68,194	62,689
Amortization and depreciation expense									4,336	2,931	2,566
INCOME BEFORE INCOME TAXES									67,212	60,055	49,195
Income tax									11,277	10,023	8,305
NET INCOME									$ 55,935	$ 50,032	$ 40,890