Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Goodwill and other intangibles	$ 48,985		$ 48,985		$ 49,617
Total assets	3,260,058		3,260,058		3,071,148
Net interest income	26,490	$ 23,921	51,757	$ 46,223
Provision for credit losses	50	2,400	475	3,500
Service fees, security gains and other noninterest income	9,821	9,136	20,404	17,006
Noninterest expense	16,580	16,950	33,550	34,936
Amortization and depreciation expense	803	790	1,601	1,541
INCOME BEFORE INCOME TAXES	18,878	12,917	36,535	23,252
Income taxes	3,303	1,906	6,404	3,602
NET INCOME	15,575	11,011	30,131	19,650
Eliminations And Others
Segment Reporting Information [Line Items]
Goodwill and other intangibles	(3,558)		(3,558)		(3,558)
Total assets	824		824		373
Net interest income	(51)	(100)	(105)	(184)
Provision for credit losses	0	0	0	0
Service fees, security gains and other noninterest income	(65)	(134)	(50)	(282)
Noninterest expense	(179)	138	(397)	571
Amortization and depreciation expense	68	68	136	116
INCOME BEFORE INCOME TAXES	(5)	(440)	106	(1,153)
Income taxes	(78)	(149)	(136)	(356)
NET INCOME	73	(291)	242	(797)
Trust Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	5,930		5,930		6,046
Total assets	16,777		16,777		15,147
Net interest income	32	30	63	64
Provision for credit losses	0	0	0	0
Service fees, security gains and other noninterest income	2,798	2,322	5,401	4,565
Noninterest expense	1,536	1,512	3,092	3,029
Amortization and depreciation expense	63	77	127	153
INCOME BEFORE INCOME TAXES	1,231	763	2,245	1,447
Income taxes	259	160	471	304
NET INCOME	972	603	1,774	1,143
Bank Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	46,613		46,613		47,129
Total assets	3,242,457		3,242,457		$ 3,055,628
Net interest income	26,509	23,991	51,799	46,343
Provision for credit losses	50	2,400	475	3,500
Service fees, security gains and other noninterest income	7,088	6,948	15,053	12,723
Noninterest expense	15,223	15,300	30,855	31,336
Amortization and depreciation expense	672	645	1,338	1,272
INCOME BEFORE INCOME TAXES	17,652	12,594	34,184	22,958
Income taxes	3,122	1,895	6,069	3,654
NET INCOME	$ 14,530	$ 10,699	$ 28,115	$ 19,304