Condensed Financial Information Of Synovus Financial Corp. (Parent Company Only) (Condensed Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Expenses
Interest expense																	$ 118,822	$ 150,023	$ 217,602
Other expenses																	741,537	816,237	903,765
Income (loss) before income taxes	59,710		73,459		72,906		46,553		(72,299)		30,514		37,347		35,916		252,628	31,477	(59,532)
Allocated income tax (benefit) expense	21,130		27,765		27,371		16,979		(796,339)		(211)		(2,105)		(77)		93,245	(798,732)	1,312
Net income (loss)	38,580	[1]	45,694	[1]	45,535	[1]	29,574	[1]	724,040	[2]	30,725	[2]	39,452	[2]	35,993	[2]	159,383	830,209	(60,844)
Net (loss) income available to non-controlling interest																	0	0	(220)
Net loss attributable to controlling interest																	159,383	830,209	(60,624)
Dividends and accretion of discount on preferred stock																	40,830	58,703	58,088
Net loss attributable to common shareholders	35,850	[1]	37,188	[1]	30,717	[1]	14,798	[1]	709,304	[2]	16,030	[2]	24,803	[2]	21,369	[2]	118,553	771,506	(118,712)
Parent Company [Member]
Income
Cash dividends received from Synovus Bank																	680,000	0	0
Interest income																	15,366	18,424	30,057
Other income																	(2,374)	11,343	(141)
Total income																	692,992	29,767	29,916
Expenses
Interest expense																	46,672	47,975	34,767
Other expenses																	8,067	16,584	14,177
Total expense																	54,739	64,559	48,944
Income (loss) before income taxes																	638,253	(34,792)	(19,028)
Allocated income tax (benefit) expense																	(16,589)	(54,184)	(13,715)
Income (loss) before equity in undistributed net income (loss) of subsidiaries																	654,842	19,392	(5,313)
Equity in undistributed net loss of subsidiaries																	(495,459)	810,817	(55,531)
Net income (loss)																	159,383	830,209	(60,844)
Net (loss) income available to non-controlling interest																	0	0	(220)
Net loss attributable to controlling interest																	159,383	830,209	(60,624)
Dividends and accretion of discount on preferred stock																	40,830	58,703	58,088
Net loss attributable to common shareholders																	$ 118,553	$ 771,506	$ (118,712)

[1] The fourth quarter of 2013 results include litigation loss contingency expense of $10.0 million

[2] The fourth quarter of 2012 results reflect a $796.3 million income tax benefit due primarily to the reversal of substantially all of the deferred tax asset valuation allowance. For additional discussion of the valuation allowance for deferred tax assets, see "Part II - Item 8. Financial Statements and Supplementary Data - Note 24 - Income Taxes" of this Report.