Revenue Recognition In Scope and Out of Scope Revenue Streams (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Fees and Commissions on Debit Cards	$ 21,677	$ 20,187	$ 18,780
Noninterest Income	85,485	88,637	80,331
Trust income	8,321	7,901	7,098
Service charges on deposit accounts	18,926	18,175	18,579
Insurance and retail brokerage commissions	7,583	7,426	8,807
Other income	7,268	6,790	7,677
Out-Of-Scope of Topic 606 [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income	24,079	30,258	21,734
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	1,062	982	1,005
Noninterest Income	61,406	58,379	58,597
Other income	$ 3,837	$ 3,708	$ 4,328