Acquisitions and Divestiture (Schedule of Acquisitions Related Costs by Component) (Details) - MidSouth [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Personnel expense	$ 7,506
Net occupancy and equipment expense	1,464
Professional services expense	7,075
Data processing expense	1,092
Other real estate	130
Advertising expense	2,581
Other expense	12,818
Total merger-related expenses	$ 32,666