Condensed Financial Information Of Synovus Financial Corp. (Parent Company Only) (Condensed Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets [Abstract]
Cash due from bank subsidiary	$ 469,630	$ 614,630
Other assets	616,376	660,378
Total assets	26,201,604	26,760,012
Liabilities and Equity [Abstract]
Long-term debt	2,033,141	1,726,455
Other liabilities	194,556	205,839
Total liabilities	23,252,619	23,190,581
Shareholders' equity:
Common stock	978,045	792,273
Additional paid-in capital	2,138,024	2,189,874
Treasury stock	(114,176)	(114,176)
Accumulated other comprehensive income	(41,258)	4,101	21,093	57,158
Accumulated deficit	(137,512)	(259,968)
Total shareholders' equity	2,948,985	3,569,431
Total liabilities and shareholders' equity	26,201,604	26,760,012
Series A Preferred Stock [Member]
Shareholders' equity:
Preferred stock	0	957,327
Series C Preferred Stock [Member]
Shareholders' equity:
Preferred stock	125,862	0
Parent Company [Member]
Assets [Abstract]
Cash due from bank subsidiary	194,175	360,426
Funds due from other depository institutions	21,712	21,712
Investment in consolidated bank subsidiaries, at equity	3,220,000	3,728,704
Net accumulated deficit in consolidated nonbank subsidiaries, at equity	(237,355)	(208,183)
Notes receivable from nonbank subsidiaries	438,168	443,935
Other assets	129,781	104,848
Total assets	3,766,481	4,451,442
Liabilities and Equity [Abstract]
Long-term debt	765,307	841,667
Other liabilities	52,189	40,344
Total liabilities	817,496	882,011
Shareholders' equity:
Common stock	978,045	792,273
Additional paid-in capital	2,138,024	2,189,874
Treasury stock	(114,176)	(114,176)
Accumulated other comprehensive income	(41,258)	4,101
Accumulated deficit	(137,512)	(259,968)
Total shareholders' equity	2,948,985	3,569,431
Total liabilities and shareholders' equity	3,766,481	4,451,442
Parent Company [Member] | Series A Preferred Stock [Member]
Shareholders' equity:
Preferred stock	0	957,327
Parent Company [Member] | Series C Preferred Stock [Member]
Shareholders' equity:
Preferred stock	$ 125,862	$ 0