Goodwill And Other Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2017	$ 57,315
Accumulated impairment losses	0
Balance as of December 31, 2018	57,315
Synovus Bank Reporting Unit
Goodwill [Roll Forward]
Balance as of December 31, 2017	32,884
Accumulated impairment losses	0
Balance as of December 31, 2018	32,884
Trust Services Reporting Unit
Goodwill [Roll Forward]
Balance as of December 31, 2017	24,431
Accumulated impairment losses	0
Balance as of December 31, 2018	$ 24,431