Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)
Operating Activities
Net income	$ 428,476		$ 275,474		$ 246,784
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	51,697		67,185		28,000
Depreciation, amortization, and accretion, net	55,172		59,121		58,228
Deferred income tax expense	36,215		231,056		128,837
Originations of mortgage loans held for sale	(543,073)		(622,564)		(705,394)
Proceeds from sales of mortgage loans held for sale	565,672		642,193		724,712
Gain on sales of mortgage loans held for sale, net	(12,291)		(13,450)		(13,780)
Increase in other assets	(83,957)		(74,090)		(9,600)
Increase (decrease) in other liabilities	22,202		28,651		(4,239)
Investment securities losses (gains), net	1,296		289		(6,011)
Loss on early extinguishment of debt, net	0		23,160		4,735
Share-based compensation expense	16,643		14,179		13,615
Net cash provided by operating activities	538,052		631,204		465,887
Investing Activities
Net cash received in acquisition	0		0		6,146
Proceeds from maturities and principal collections of investment securities available for sale	603,099		632,875		894,123
Proceeds from sales of investment securities available for sale	35,066		812,293		968,606
Purchases of investment securities available for sale	(700,194)		(1,729,902)		(2,051,283)
Proceeds from sales of loans	22,915		42,726		15,046
Proceeds from sales of other real estate and other assets	12,854		17,480		43,834
Net increase in loans including purchases of loans	(1,235,260)		(1,060,582)		(1,129,422)
Net (purchases) redemptions of Federal Home Loan Bank stock	(25,500)		7,438		(4,250)
Net (purchases) redemptions of Federal Reserve Bank stock	(282)		2,984		(97,293)
Purchases of bank-owned life insurance policies, net of settlements	2,412		(148,110)		(28,126)
Net increase in premises and equipment	(53,159)		(51,106)		(34,317)
Net cash used in investing activities	(1,338,049)		(1,473,904)		(1,416,936)
Financing Activities
Net increase in deposits	571,897		1,499,085		1,404,558
Net increase (decrease) in federal funds purchased and securities sold under repurchase agreements	76,502		1,491		(17,326)
Net increase (decrease) in other short-term borrowings	550,000		100,000		(50,000)
Repayments and redemption of long-term debt	(2,230,052)		(2,350,422)		(2,213,688)
Proceeds from issuance of long-term debt	2,280,000		1,771,866		1,875,000
Dividends paid to common shareholders	(106,224)		(54,670)		(59,425)
Dividends paid to preferred shareholders	(13,978)		(10,238)		(10,238)
Net proceeds from issuance of Series D Preferred Stock	195,140		0		0
Redemption of Series C Preferred Stock	(130,000)		0		0
Stock options exercised	2,139		3,440		5,155
Earnout payment	(1,220)		(892)		0
Repurchase of common stock	(175,072)		(175,079)		(263,084)
Taxes paid related to net share settlement of equity awards	(8,504)		(7,993)		(5,041)
Net cash provided by financing activities	1,010,628		776,588		665,911
Increase (decrease) in cash and cash equivalents including restricted cash	210,631		(66,112)		(285,138)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of year	932,933	[1],[2]	999,045	[2]	1,284,183	[2]
Cash, cash equivalents, restricted cash, and restricted cash equivalents at end of year	1,143,564	[1],[2]	932,933	[1],[2]	999,045	[2]
Supplemental Cash Flow Information
Income taxes, net	41,008		18,040		9,340
Interest	180,241		143,237		123,560
Non-cash Activities:
Loans foreclosed and transferred to other real estate	13,168		7,154		16,214
Premises and equipment transferred to/(from) other assets, net	896		7,733		25,231
Topic 606 cumulative-effect adjustment to opening balance of retained earnings	(685)		0		0
Subtopic 825-10 equity investment securities available for sale transferred to other assets at fair value	3,162		0		0
Loans transferred to (from) other loans held for sale at fair value, net	12,568		52,829		14,621
Dividends declared on common stock during the year but paid after year-end	28,966		17,835		0
Settlement of earnout payment with shares of common stock	7,427		5,460		0
Acquisition:
Fair value of non-cash assets acquired	0		0		408,054
Fair value of liabilities assumed	0		0		387,608
Fair value of common stock issued	$ 0		$ 0		$ 26,592

[1] See "Note 1 - Summary of Significant Accounting Policies" of this Report for information on Synovus' change in presentation of cash and cash equivalents.

[2] See "Note 1 - Summary of Significant Accounting Policies" of this Report for information on Synovus' change in presentation of cash and cash equivalents.See accompanying notes to the audited consolidated financial statements.