Goodwill And Other Intangible Assets (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) reporting_unit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Goodwill [Line Items]
Goodwill	$ 57,315	$ 57,315
Number of reporting units | reporting_unit	2
Aggregate estimated amortization expense in 2019	$ 1,200
Aggregate estimated amortization expense in 2020	1,200
Aggregate estimated amortization expense in 2021	1,200
Aggregate estimated amortization expense in 2022	1,200
Aggregate estimated amortization expense in 2023	1,200
Global One
Goodwill [Line Items]
Accumulated amortization	1,200	1,100	$ 521
Synovus Bank Reporting Unit
Goodwill [Line Items]
Goodwill	32,884	32,884
Trust Services Reporting Unit
Goodwill [Line Items]
Goodwill	$ 24,431	$ 24,431