Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2017

Regulatory Capital Disclosure [Abstract]

Schedule of Compliance with Regulatory Capital

The following table summarizes regulatory capital information at December 31, 2017 and 2016 on a consolidated basis and for Synovus’ significant subsidiary, defined as any direct subsidiary with assets or net income levels exceeding 10% of the consolidated totals.

	Actual						For Capital Adequacy Purposes						To Be Well Capitalized Under Prompt Corrective Action Provisions (1)
(dollars in thousands)	2017			2016			2017			2016			2017			2016
Synovus Financial Corp.
Common equity tier 1 capital	$	2,763,168		$	2,654,287		$	1,250,488		$	1,199,794		N/A			N/A
Tier 1 capital	2,872,001			2,685,880			1,660,074			1,599,725			N/A			N/A
Total risk-based capital	3,383,081			3,201,268			2,213,432			2,132,966			N/A			N/A
Common equity tier 1 capital ratio	9.99		%	9.96		%	4.50		%	4.50		%	N/A			N/A
Tier 1 capital ratio	10.38			10.07			6.00			6.00			N/A			N/A
Total risk-based capital ratio	12.23			12.01			8.00			8.00			N/A			N/A
Leverage ratio	9.19			8.99			4.00			4.00			N/A			N/A
Synovus Bank
Common equity tier 1 capital	$	3,155,163		$	3,187,583		$	1,247,462		$	1,197,976		$	1,795,004		$	1,730,410
Tier 1 capital	3,155,163			3,187,583			1,656,927			1,597,302			2,209,236			2,129,736
Total risk-based capital	3,406,243			3,441,563			2,209,236			2,129,736			2,761,545			2,662,169
Common equity tier 1 capital ratio	11.43		%	11.97		%	4.50		%	4.50		%	6.50		%	6.50		%
Tier 1 capital ratio	11.43			11.97			6.00			6.00			8.00			8.00
Total risk-based capital ratio	12.33			12.93			8.00			8.00			10.00			10.00
Leverage ratio	10.12			10.68			4.00			4.00			5.00			5.00

⁽¹⁾ The prompt corrective action provisions are applicable at the bank level only.