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Condensed Financial Information Of Synovus Financial Corp. (Parent Company Only) (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Activities |  |  |
Net income | $ 373,695 | $ 563,780 | $ 428,476
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Other | 55,343 | 4,592 | 0
Net cash provided by operating activities | 17,032 | 621,050 | 538,052
Investing Activities |  |  |
Net cash used in investing activities | (2,352,973) | (2,153,862) | (1,338,049)
Financing Activities |  |  |
Repurchases of common stock | (16,246) | (725,398) | (175,072)
Repayments and redemption of long-term debt | (2,408,939) | (157,226) | (2,230,052)
Proceeds from issuance of long-term debt, net | 1,445,492 | 497,045 | 2,280,000
Proceeds from issuance (redemption) of preferred stock, net | 0 | 342,005 | 65,140
Other | (1,552) | (1,947) | (1,220)
Net cash provided by financing activities | 5,401,940 | 1,576,166 | 1,010,628
Increase in cash, cash equivalents, and restricted cash | 3,065,999 | 43,354 | 210,631
Cash, cash equivalents, and restricted cash at beginning of year | 1,186,918 | 1,143,564 | 932,933
Cash, cash equivalents, and restricted cash at end of year | 4,252,917 | 1,186,918 | 1,143,564
Income taxes paid | 110,828 | 101,781 | 41,008
Interest paid | 319,282 | 464,712 | 180,241
Parent Company |  |  |
Operating Activities |  |  |
Net income | 373,695 | 563,780 | 428,476
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Equity in undistributed (income) loss of subsidiaries | 140,819 | (191,373) | (203,729)
Deferred income tax expense | 3,962 | 1,775 | 1,055
Net increase in other liabilities | 11,243 | 43,617 | 9,551
Net decrease in other assets | 17,441 | 3,367 | 6,723
Other | (5,132) | 1,037 | 1,115
Net cash provided by operating activities | 542,028 | 422,203 | 243,191
Investing Activities |  |  |
Proceeds from sales of investment securities available for sale | 0 | 97,389 | 0
Advance of long-term note receivable due from bank subsidiary | 0 | (100,000) | 0
Return of investment non-bank subsidiary | 0 | 790 | 0
Net cash received in business combination, net of cash paid | 0 | 4,813 | 0
Proceeds from sales of equity securities | 23,141 | 0 | 0
Net cash used in investing activities | 23,141 | 2,992 | 0
Financing Activities |  |  |
Dividends paid to common and preferred shareholders | (223,130) | (185,664) | (120,202)
Repurchases of common stock | (16,246) | (725,398) | (175,072)
Repayments and redemption of long-term debt | (250,000) | 0 | 0
Proceeds from issuance of long-term debt, net | 0 | 297,174 | 0
Proceeds from issuance (redemption) of preferred stock, net | 0 | 342,005 | 65,140
Other | (1,552) | (1,947) | (1,220)
Net cash provided by financing activities | (490,928) | (273,830) | (231,354)
Increase in cash, cash equivalents, and restricted cash | 74,241 | 151,365 | 11,837
Cash, cash equivalents, and restricted cash at beginning of year | 374,388 | 223,023 | 211,186
Cash, cash equivalents, and restricted cash at end of year | 448,629 | 374,388 | 223,023
Income taxes paid | 119,100 | 101,600 | 41,700
Interest paid | $ 42,000 | $ 33,100 | $ 24,200

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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