Revenue Recognition In Scope and Out of Scope Revenue Streams (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Fees and Commissions on Debit Cards	$ 23,966	$ 21,677	$ 20,187
Noninterest Income	94,476	85,485	88,637
Trust income	9,101	8,321	7,901
Service charges on deposit accounts	16,387	18,926	18,175
Insurance and retail brokerage commissions	7,850	7,583	7,426
Other income	7,892	7,268	6,790
Out-Of-Scope of Topic 606 [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income	32,530	24,079	30,258
In-Scope of Topic 606 [Member]
Disaggregation of Revenue [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	967	1,062	982
Noninterest Income	61,946	61,406	58,379
Other income	$ 3,675	$ 3,837	$ 3,708