CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Loans, including fees	$ 686,094	$ 478,448	$ 1,985,881	$ 1,230,847
Investment securities available for sale	61,642	53,550	183,118	151,111
Loans held for sale	17,914	12,017	29,292	26,798
Federal Reserve Bank balances	15,483	5,584	49,711	7,965
Other earning assets	4,906	1,700	14,059	4,412
Total interest income	786,039	551,299	2,262,061	1,421,133
Interest expense:
Deposits	292,060	46,917	707,774	79,077
Long-term debt	50,524	22,156	148,968	41,069
Other borrowings	296	4,307	25,877	5,432
Total interest expense	342,880	73,380	882,619	125,578
Net interest income	443,159	477,919	1,379,442	1,295,555
Provision for (reversal of) credit losses	72,572	25,581	143,607	49,669
Net interest income after provision for (reversal of) credit losses	370,587	452,338	1,235,835	1,245,886
Non-interest revenue:
Service charges on deposit accounts	21,385	23,398	67,836	69,428
Fiduciary and asset management fees	20,205	19,201	59,928	59,577
Card fees	18,602	15,101	51,485	45,946
Brokerage revenue	20,237	17,140	63,703	47,038
Mortgage banking income	3,671	5,065	12,138	14,922
Capital markets income	6,377	6,839	27,077	19,704
Income from bank-owned life insurance	6,965	6,792	21,106	22,514
Investment securities gains (losses), net	0	0	1,030	0
Recovery of NPA	0	0	13,126	0
Other non-interest revenue	9,697	10,762	35,112	27,768
Total non-interest revenue	107,139	104,298	352,541	306,897
Non-interest expense:
Salaries and other personnel expense	179,741	173,334	551,667	499,081
Net occupancy, equipment, and software expense	45,790	43,462	131,435	129,538
Third-party processing and other services	21,439	22,539	64,932	65,486
Professional fees	10,147	6,755	28,707	26,094
FDIC insurance and other regulatory fees	11,837	7,707	33,266	20,851
Restructuring charges (reversals)	17,319	956	16,476	(7,318)
Loss on other loans held for sale	30,954	0	50,064	0
Other operating expense	36,305	39,257	106,019	114,779
Total non-interest expense	353,532	294,010	982,566	848,511
Income before income taxes	124,194	262,626	605,810	704,272
Income tax expense	27,729	59,582	133,242	152,140
Net income	96,465	203,044	472,568	552,132
Less: Net income (loss) attributable to noncontrolling interest	(630)	0	(796)	0
Net income attributable to Synovus Financial Corp.	97,095	203,044	473,364	552,132
Less: Preferred stock dividends	9,672	8,291	26,254	24,872
Net income available to common shareholders	$ 87,423	$ 194,753	$ 447,110	$ 527,260
Net income per common share, basic (in dollars per share)	$ 0.60	$ 1.34	$ 3.06	$ 3.63
Net income per common share, diluted (in dollars per share)	$ 0.60	$ 1.33	$ 3.05	$ 3.60
Weighted average common shares outstanding, basic (in shares)	146,170	145,386	146,028	145,329
Weighted average common shares outstanding, diluted (in shares)	146,740	146,418	146,683	146,465