Revenue Revenue from contracts with customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Commission and fees from sale of insurance policies	$ 3,195	$ 2,933	$ 6,371	$ 5,625
Fees related to third party insurance administration services	106	120	200	267
Performance-based insurance commissions	34	138	1,985	1,429
Interchange electronic banking income	3,603	2,844	6,650	5,244
Promotional and usage electronic banking income	815	679	1,679	1,559
Ongoing maintenance fees for deposit accounts	853	849	1,664	1,829
Transactional-based fees for deposit accounts	1,191	1,060	2,366	2,900
Transactional-based fees included in other non-interest income	249	220	393	428
Revenue from Contract with Customer, Excluding Assessed Tax	14,327	13,114	29,494	27,058
Insurance income	3,335	3,191	8,556	7,321
Fiduciary and Trust [Member]
Revenue from Contract with Customer, Including Assessed Tax	4,220	3,316	8,065	6,578
Interest Rate Swap [Member] | Transaction fee [Member]
Revenue from Contract with Customer, Including Assessed Tax	61	955	121	1,199
Transferred over Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	12,792	10,741	24,629	21,102
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,535	$ 2,373	$ 4,865	$ 5,956