Segment Reporting (Business Segment Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Goodwill	$ 66,062	$ 66,062	$ 66,062
Other intangible assets, net	7,727	8,861
Total assets	4,912,306	4,384,178
Banking [Member]
Segment Reporting Information [Line Items]
Goodwill	48,536	48,536	48,536
All Other [Member]
Segment Reporting Information [Line Items]
Goodwill	17,526	17,526	$ 17,526
Operating Segment [Member] | Banking [Member]
Segment Reporting Information [Line Items]
Goodwill	48,536	48,536
Other intangible assets, net	28	98
Total assets	4,875,673	4,346,615
Operating Segment [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Goodwill	17,526	17,526
Other intangible assets, net	7,699	8,763
Total assets	$ 36,633	$ 37,563