CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest income:
Loans, including fees	$ 670,230	$ 391,307	$ 1,299,787	$ 752,399
Investment securities available for sale	60,421	50,312	121,475	97,562
Loans held for sale	5,801	8,600	11,378	14,781
Federal Reserve Bank balances	17,410	1,593	34,228	2,382
Other earning assets	5,281	1,960	9,154	2,710
Total interest income	759,143	453,772	1,476,022	869,834
Interest expense:
Deposits	241,780	18,501	415,715	32,160
Long-term debt	55,915	8,769	98,444	18,913
Other borrowings	5,917	1,114	25,580	1,126
Total interest expense	303,612	28,384	539,739	52,199
Net interest income	455,531	425,388	936,283	817,635
Provision for (reversal of) credit losses	38,881	12,688	71,035	24,088
Net interest income after provision for (reversal of) credit losses	416,650	412,700	865,248	793,547
Non-interest revenue:
Service charges on deposit accounts	23,477	23,491	46,451	46,030
Fiduciary and asset management fees	20,027	20,100	39,723	40,377
Card fees	17,059	16,089	32,884	30,846
Brokerage revenue	20,908	15,243	43,466	29,898
Mortgage banking income	4,609	3,904	8,467	9,857
Capital markets income	6,975	7,393	20,700	12,864
Income from bank-owned life insurance	6,878	9,165	14,140	15,722
Investment securities gains (losses), net	0	0	1,030	0
Recovery of NPA	0	0	13,126	0
Other non-interest revenue	12,343	1,881	25,415	17,006
Total non-interest revenue	112,276	97,266	245,402	202,600
Non-interest expense:
Salaries and other personnel expense	183,001	161,063	371,926	325,747
Net occupancy, equipment, and software expense	42,785	43,199	85,645	86,076
Third-party processing and other services	21,659	21,952	43,493	42,947
Professional fees	9,597	10,865	18,560	19,338
FDIC insurance and other regulatory fees	11,162	6,894	21,429	13,144
Restructuring charges (reversals)	(110)	(1,850)	(843)	(8,274)
Loss on other loans held for sale	2,360	0	19,110	0
Other operating expense	36,727	39,928	69,714	75,523
Total non-interest expense	307,181	282,051	629,034	554,501
Income before income taxes	221,745	227,915	481,616	441,646
Income tax expense	47,801	49,863	105,513	92,558
Net income	173,944	178,052	376,103	349,088
Less: Net income (loss) attributable to noncontrolling interest	(166)	0	(166)	0
Net income attributable to Synovus Financial Corp.	174,110	178,052	376,269	349,088
Less: Preferred stock dividends	8,291	8,291	16,581	16,581
Net income available to common shareholders	$ 165,819	$ 169,761	$ 359,688	$ 332,507
Net income per common share, basic (in dollars per share)	$ 1.13	$ 1.17	$ 2.46	$ 2.29
Net income per common share, diluted (in dollars per share)	$ 1.13	$ 1.16	$ 2.45	$ 2.27
Weighted average common shares outstanding, basic (in shares)	146,113	145,328	145,957	145,301
Weighted average common shares outstanding, diluted (in shares)	146,550	146,315	146,644	146,489