Revenue Revenue from Contract with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Commission and fees from sale of insurance policies	$ 12,670	$ 12,787
Fees related to third party insurance administration services	602	573
Performance-based insurance commissions	1,530	1,452
Interchange electronic banking income	10,797	9,721
Promotional and usage electronic banking income	2,883	1,756
Ongoing maintenance fees for deposit accounts	3,832	2,718
Transactional-based fees for deposit accounts	7,868	7,060
Transactional-based fees included in other non-interest income	716	961
Revenue from Contract with Customer, Excluding Assessed Tax	56,285	50,252
Fiduciary and Trust [Member]
Commercial loan swap fees	13,159	12,543	$ 11,558
Interest Rate Swap | transaction fee [Member]
Commercial loan swap fees	2,228	681	$ 1,232
Transferred over Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	43,943	40,098
Transferred at Point in Time [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 12,342	$ 10,154