Goodwill and Other Intangible Assets (Summary of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Indefinite-lived Intangible Assets by Major Class [Line Items]
Accumulated amortization	$ (36,344)	$ (34,130)
Total other intangible assets, gross	83,401	83,554
Total other intangible assets, net	47,057	49,424
Community banking
Indefinite-lived Intangible Assets by Major Class [Line Items]
Total other intangible assets, net	34,680	31,760
Community banking | Core deposit and other intangibles
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	55,206	55,366
Accumulated amortization	(26,326)	(29,406)
Net carrying amount	28,880	25,960
Specialty finance | Customer list intangibles
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	1,965	1,958
Accumulated amortization	(1,552)	(1,436)
Net carrying amount	413	522
Wealth management | Customer list and other intangibles
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross carrying amount	20,430	20,430
Accumulated amortization	(8,466)	(3,288)
Net carrying amount	11,964	17,142
Trademarks | Community banking
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount, indefinite lives	$ 5,800	$ 5,800