Synovus Financial (SNV) 10-Q 8 Aug 18 2018 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 06, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Entity Registrant Name	SYNOVUS FINANCIAL CORP
Entity Central Index Key	18,349
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		117,348,421

CONSOLIDATED BALANCE SHEETS (un

CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks		$ 404,080	$ 397,848
Interest bearing funds with Federal Reserve Bank		613,082	460,928
Interest earning deposits with banks		33,754	26,311
Federal funds sold and securities purchased under resale agreements		40,872	47,846
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	[1],[2]	1,091,788	932,933
Mortgage loans held for sale, at fair value		53,673	48,024
Investment securities available for sale, at fair value		3,929,962	3,987,069
Loans, net of deferred fees and costs		25,134,056	24,787,464
Allowance for loan losses		(251,725)	(249,268)
Loans, net		24,882,331	24,538,196
Cash surrender value of bank-owned life insurance		547,261	540,958
Premises and equipment, net		428,633	426,813
Goodwill		57,315	57,315
Other intangible assets		10,458	11,254
Deferred tax asset, net		182,983	165,788
Other assets		555,901	513,487
Total assets		31,740,305	31,221,837
Deposits:
Non-interest bearing deposits		7,630,491	7,686,339
Interest bearing deposits, excluding brokered deposits		16,961,187	16,500,436
Brokered deposits		1,851,010	1,961,125
Total deposits		26,442,688	26,147,900
Federal funds purchased and securities sold under repurchase agreements		207,580	161,190
Long-term debt		1,656,647	1,706,138
Other liabilities		265,696	245,043
Total liabilities		28,572,611	28,260,271
Shareholders' Equity
Common stock - $1.00 par value. Authorized 342,857,143 shares; 143,077,973 issued at June 30, 2018 and 142,677,449 issued at December 31, 2017; 117,841,369 outstanding at June 30, 2018 and 118,897,295 outstanding at December 31, 2017		143,078	142,678
Additional paid-in capital		3,045,014	3,043,129
Treasury stock, at cost – 25,236,604 shares at June 30, 2018 and 23,780,154 shares at December 31, 2017		(916,484)	(839,674)
Accumulated other comprehensive loss		(125,720)	(54,754)
Retained earnings		700,688	544,207
Total shareholders’ equity		3,167,694	2,961,566
Total liabilities and shareholders' equity		31,740,305	31,221,837
Series D Preferred Stock
Shareholders' Equity
Preferred Stock		195,138	0
Series C Preferred Stock
Shareholders' Equity
Preferred Stock		$ 125,980	$ 125,980
[1]	See "Note 1 - Significant Accounting Policies" of this Report for information on Synovus' change in presentation of cash and cash equivalents.
[2]	See "Note 1 - Significant Accounting Policies" of this Report for information on Synovus' change in presentation of cash and cash equivalents.

CONSOLIDATED BALANCE SHEETS (u3

CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	342,857,143	342,857,143
Common stock, shares issued (in shares)	143,077,973	142,677,449
Common stock, shares outstanding (in shares)	117,841,369	118,897,295
Treasury stock, shares at cost (in shares)	25,236,604	23,780,154
Series D Preferred Stock
Preferred Stock, shares authorized (in shares)	100,000,000
Preferred Stock, shares issued (in shares)	8,000,000
Preferred stock, shares outstanding (in shares)	8,000,000
Series C Preferred Stock
Preferred Stock, shares issued (in shares)	5,200,000	5,200,000
Preferred stock, shares outstanding (in shares)	5,200,000	5,200,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income:
Loans, including fees	$ 300,056	$ 261,971	$ 585,396	$ 511,319
Investment securities available for sale	23,884	20,266	47,812	40,099
Trading account assets	166	21	220	49
Mortgage loans held for sale	557	505	936	972
Federal Reserve Bank balances	2,818	1,304	4,568	2,515
Other earning assets	2,353	1,443	4,036	2,957
Total interest income	329,834	285,510	642,968	557,911
Interest expense:
Deposits	32,600	18,118	58,975	35,075
Federal funds purchased and securities sold under repurchase agreements	203	45	310	84
Long-term debt	12,454	16,250	24,822	31,728
Total interest expense	45,257	34,413	84,107	66,887
Net interest income	284,577	251,097	558,861	491,024
Provision for loan losses	11,790	10,260	24,566	18,934
Net interest income after provision for loan losses	272,787	240,837	534,295	472,090
Non-interest income:
Revenue from contract with customers	56,350	51,835	110,665	103,321
Income from bank-owned life insurance	3,733	3,272	7,949	6,328
Investment securities (losses) gains, net	(1,296)	(1)	(1,296)	7,667
Decrease in fair value of private equity investments, net	(37)	(1,352)	(3,093)	(3,166)
Other non-interest income	7,174	4,807	11,124	7,762
Total non-interest income	73,387	68,701	140,433	140,539
Non-interest expense:
Salaries and other personnel expense	111,863	105,213	225,583	212,404
Net occupancy and equipment expense	32,654	29,933	64,134	59,264
Third-party processing expense	15,067	13,620	29,012	26,223
FDIC insurance and other regulatory fees	6,543	6,875	13,335	13,645
Professional fees	6,284	7,551	11,789	12,907
Advertising expense	5,220	5,346	10,312	11,258
Valuation adjustment to Visa derivative	2,328	0	2,328	0
Foreclosed real estate expense, net	(107)	1,448	749	3,582
Earnout liability adjustment	0	1,707	0	1,707
Restructuring charges, net	103	13	(212)	6,524
Other operating expenses	24,102	20,041	42,204	41,619
Total non-interest expense	204,057	191,747	399,234	389,133
Income before income taxes	142,117	117,791	275,494	223,496
Income tax expense	30,936	41,788	61,146	75,635
Net income	111,181	76,003	214,348	147,861
Dividends on preferred stock	2,559	2,559	5,119	5,119
Net income available to common shareholders	$ 108,622	$ 73,444	$ 209,229	$ 142,742
Net income per common share, basic (in dollars per share)	$ 0.92	$ 0.60	$ 1.77	$ 1.17
Net income per common share, diluted (in dollars per share)	$ 0.91	$ 0.60	$ 1.75	$ 1.16
Weighted average common shares outstanding, basic (in shares)	118,397	122,203	118,531	122,251
Weighted average common shares outstanding, diluted (in shares)	119,139	123,027	119,229	123,043
Service charges on deposit accounts
Non-interest income:
Revenue from contract with customers	$ 19,999	$ 20,252	$ 39,938	$ 40,370
Fiduciary and asset management fees
Non-interest income:
Revenue from contract with customers	13,983	12,524	27,419	24,676
Card fees
Non-interest income:
Revenue from contract with customers	10,833	10,041	21,032	19,885
Brokerage revenue
Non-interest income:
Revenue from contract with customers	8,900	7,210	17,596	14,436
Mortgage banking income
Non-interest income:
Revenue from contract with customers	4,839	5,784	9,887	11,548
Other fee income
Non-interest income:
Revenue from contract with customers	$ 5,259	$ 6,164	$ 9,877	$ 11,033

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income, Before-tax Amount	$ 142,117	$ 117,791	$ 275,494	$ 223,496
Net income, Tax (Expense) Benefit	(30,936)	(41,788)	(61,146)	(75,635)
Net income	111,181	76,003	214,348	147,861
Net change related to cash flow hedges:
Reclassification adjustment for losses realized in net income, Before-tax Amount	0	65	0	130
Reclassification adjustment for losses realized in net income, Tax (Expense) Benefit	0	(25)	0	(50)
Reclassification adjustment for losses realized in net income, Net of Tax Amount	0	40	0	80
Net unrealized gains on investment securities available for sale:
Reclassification adjustment for net losses (gains) realized in net income, Before-tax Amount	1,296	1	1,296	(7,667)
Net unrealized gains arising during the period, Before-tax Amount	(25,476)	11,150	(86,921)	20,250
Net unrealized gain, Before-tax Amount	(24,180)	11,151	(85,625)	12,583
Net unrealized gains on investment securities available for sale: Tax (Expense) Benefit
Reclassification adjustment for net losses (gains) realized in net income, Tax (Expense) Benefit	(336)	0	(336)	2,952
Net unrealized gains arising during the period, Tax (Expense) Benefit	6,598	(4,293)	22,512	(7,797)
Net unrealized gains, Tax (Expense) Benefit	6,262	(4,293)	22,176	(4,845)
Net unrealized gains on investment securities available for sale: Net of Tax Amount
Reclassification adjustment for net losses (gains) realized in net income, Net of Tax Amount	960	1	960	(4,715)
Net unrealized gains arising during the period, Net of Tax Amount	(18,878)	6,857	(64,409)	12,453
Net unrealized gains, Net of Tax Amount	(17,918)	6,858	(63,449)	7,738
Post-retirement unfunded health benefit: Before-tax Amount
Reclassification adjustment for gains realized in net income, Before-tax Amount	(34)	(20)	(68)	(40)
Net unrealized (realized) gains, Before-tax Amount	(34)	(20)	(68)	(40)
Post-retirement unfunded health benefit: Tax (Expense) Benefit
Reclassification adjustment for gains realized in net income, Tax (Expense) Benefit	9	8	22	16
Net unrealized (realized) gains, Tax (Expense) Benefit	9	8	22	16
Post-retirement unfunded health benefit: Net of Tax Amount
Reclassification adjustment for gains realized in net income, Net of Tax Amount	(25)	(12)	(46)	(24)
Net unrealized (realized) gain, Net of Tax Amount	(25)	(12)	(46)	(24)
Other comprehensive income (loss), Before-tax Amount	(24,214)	11,196	(85,693)	12,673
Other comprehensive income (loss), Tax (Expense) Benefit	6,271	(4,310)	22,198	(4,879)
Other comprehensive income (loss), Net of Tax Amount	(17,943)	6,886	(63,495)	7,794
Comprehensive income, Net of Tax Amount	$ 93,238	$ 82,889	$ 150,853	$ 155,655

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Preferred StockSeries D Preferred Stock	Preferred StockSeries C Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU	$ 0
Balance at Dec. 31, 2016	2,927,924	$ 0	$ 125,980	$ 142,026	$ 3,028,405	$ (664,595)	$ (55,659)	$ 351,767
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	147,861							147,861
Other comprehensive income (loss), net of income taxes	7,794						7,794
Cash dividends declared on common stock	(36,696)							(36,696)
Cash dividends paid on Series C Preferred Stock	(5,119)							(5,119)
Repurchases of common stock	(45,349)					(45,349)
Restricted share unit activity	(7,810)			330	(7,850)			(290)
Stock options exercised	2,504			143	2,361
Share-based compensation expense	6,838				6,838
Balance at Jun. 30, 2017	2,997,947	0	125,980	142,499	3,029,754	(709,944)	(47,865)	457,523
Balance at Mar. 31, 2017							(54,751)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss), net of income taxes	6,886						6,886
Balance at Jun. 30, 2017	2,997,947	0	125,980	142,499	3,029,754	(709,944)	(47,865)	457,523
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU	(685)
Adoption of ASU | ASU 2014-09	(685)							(685)
Adoption of ASU | ASU 2018-02	0						(7,588)	7,588
Adoption of ASU | ASU 2016-01	0						117	(117)
Balance at Dec. 31, 2017	2,961,566	0	125,980	142,678	3,043,129	(839,674)	(54,754)	544,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	214,348							214,348
Other comprehensive income (loss), net of income taxes	(63,495)						(63,495)
Cash dividends declared on common stock	(59,185)							(59,185)
Cash dividends paid on Series C Preferred Stock	(5,119)							(5,119)
Issuance of Series D Preferred Stock, net of issuance costs	195,138	195,138
Repurchases of common stock	(76,810)					(76,810)
Restricted share unit activity	(8,280)			289	(8,220)			(349)
Stock options exercised	1,896			111	1,785
Share-based compensation expense	8,320				8,320
Balance at Jun. 30, 2018	3,167,694	195,138	125,980	143,078	3,045,014	(916,484)	(125,720)	700,688
Balance at Mar. 31, 2018							(107,777)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss), net of income taxes	(17,943)						(17,943)
Balance at Jun. 30, 2018	3,167,694	$ 195,138	$ 125,980	$ 143,078	$ 3,045,014	$ (916,484)	$ (125,720)	$ 700,688
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU | ASU 2016-01	$ 3,200

CONSOLIDATED STATEMENTS OF CHA7

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock (USD per share)	$ 0.50	$ 0.30

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2018		Jun. 30, 2017
Operating Activities
Net income		$ 214,348		$ 147,861
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		24,566		18,934
Depreciation, amortization, and accretion, net		28,661		29,334
Deferred income tax expense		5,222		70,484
Originations of mortgage loans held for sale		(286,070)		(325,094)
Proceeds from sales of mortgage loans held for sale		287,175		323,861
Gain on sales of mortgage loans held for sale, net		(6,198)		(7,049)
Increase in other assets		(52,294)		(4,124)
Increase (decrease) in other liabilities		8,292		(9,667)
Investment securities losses (gains), net		1,296		(7,667)
Share-based compensation expense		8,320		6,838
Net cash provided by operating activities		233,318		243,711
Investing Activities
Proceeds from maturities and principal collections of investment securities available for sale		294,152		313,902
Proceeds from sales of investment securities available for sale		35,066		338,381
Purchases of investment securities available for sale		367,458		748,754
Proceeds from sales of loans		13,954		10,747
Proceeds from sales of other real estate		4,631		5,492
Net increase in loans		(382,086)		(612,309)
Purchases of bank-owned life insurance policies, net of settlements		1,783		(73,110)
Net increase in premises and equipment		(26,780)		(15,386)
Proceeds from sales of other assets held for sale		2,106		3,158
Net cash used in investing activities		(424,632)		(777,879)
Financing Activities
Net (decrease) increase in demand and savings deposits		(39,614)		367,450
Net increase in certificates of deposit		334,130		202,927
Net increase (decrease) in federal funds purchased and securities sold under repurchase agreements		46,390		(9,320)
Repayments and redemption of long-term debt		(2,330,052)		(1,128,591)
Proceeds from issuance of long-term debt		2,280,000		1,075,000
Dividends paid to common shareholders		(47,510)		(18,349)
Dividends paid to preferred shareholders		(5,119)		(5,119)
Proceeds from issuance of Series D Preferred Stock		195,138		0
Stock options exercised		1,896		2,504
Repurchase of common stock		(76,810)		(45,349)
Taxes paid related to net share settlement of equity awards		(8,280)		(7,810)
Net cash provided by financing activities		350,169		433,343
Increase/(decrease) in cash and cash equivalents including restricted cash		158,855		(100,825)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	[2]	932,933	[1]	999,045
Cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	[2]	1,091,788	[1]	898,220
Supplemental Cash Flow Information
Income tax payments, net		38,619		8,768
Interest paid		80,884		67,007
Non-cash Activities
Premises and equipment transferred to other assets held for sale		785		0
Other assets held for sale transferred to premises and equipment		0		4,450
Loans foreclosed and transferred to other real estate		7,561		5,516
Loans transferred to other loans held for sale at fair value		5,233		10,584
Equity investment securities available for sale transferred to other assets at fair value		3,162		0
Dividends declared on common stock during the period but paid after period-end		$ 29,510		$ 18,349
[1]	See "Note 1 - Significant Accounting Policies" of this Report for information on Synovus' change in presentation of cash and cash equivalents.
[2]	See "Note 1 - Significant Accounting Policies" of this Report for information on Synovus' change in presentation of cash and cash equivalents.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 - Significant Accounting Policies Business Operations The accompanying unaudited interim consolidated financial statements of Synovus Financial Corp. include the accounts of the Parent Company and its consolidated subsidiaries. Synovus Financial Corp. is a financial services company based in Columbus, Georgia. Through its wholly-owned subsidiary, Synovus Bank, a Georgia state-chartered bank that is a member of the Federal Reserve System, the company provides commercial and retail banking in addition to a full suite of specialized products and services including private banking, treasury management, wealth management, premium finance and international banking. Synovus Bank is positioned in some of the highest growth markets in the Southeast, with 250 branches and 334 ATMs in Georgia, Alabama, South Carolina, Florida, and Tennessee. Basis of Presentation The accompanying unaudited interim consolidated financial statements have been prepared in accordance with the instructions to the SEC Form 10-Q and Article 10 of Regulation S-X; therefore, they do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, comprehensive income, and cash flows in conformity with GAAP. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the consolidated financial position and results of operations for the periods covered by this Report have been included. The accompanying unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes appearing in Synovus' 2017 Form 10-K . In connection with the adoption of ASU 2016-18, Statement of Cash Flows-Restricted Cash, Synovus changed its presentation of cash and cash equivalents, effective January 1, 2018, to include cash and due from banks as well as interest bearing funds with the Federal Reserve Bank, interest earning deposits with banks, and federal funds sold and securities purchased under resale agreements, which are inclusive of any restricted cash and restricted cash equivalents. Prior to 2018, cash and cash equivalents only included cash and due from banks. Prior periods have been revised to maintain comparability. Excluding the aforementioned presentation change, there have been no significant changes to the accounting policies as disclosed in Synovus' 2017 Form 10-K . In preparing the unaudited interim consolidated financial statements in accordance with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the respective consolidated balance sheets and the reported amounts of revenues and expenses for the periods presented. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, the fair value of investment securities, and the fair value of private equity investments. Cash and Cash Equivalents Cash and cash equivalents consist of cash and due from banks, interest bearing funds with the Federal Reserve Bank, interest earning deposits with banks, federal funds sold and securities purchased under resale agreements, and is inclusive of any restricted cash and restricted cash equivalents. Restricted cash and restricted cash equivalents primarily relate to cash held on deposit with the Federal Reserve to meet reserve requirements as well as cash posted as collateral for derivatives in a liability position. At June 30, 2018 and December 31, 2017 , interest bearing funds with the Federal Reserve Bank included $35.7 million and $8.6 million , respectively, on deposit to meet Federal Reserve Bank requirements. Interest earning deposits with banks include $2.7 million and $5.9 million at June 30, 2018 and December 31, 2017 , respectively, which are pledged as collateral in connection with certain letters of credit. Federal funds sold include $30.6 million and $43.8 million at June 30, 2018 and December 31, 2017 , respectively, which are pledged to collateralize certain derivative financial instruments. Federal funds sold and securities purchased under resale agreements generally mature in one day. Income Taxes On December 22, 2017, Federal Tax Reform was enacted into law. The new legislation included a decrease in the corporate federal income tax rate from 35% to 21% effective January 1, 2018. Under ASC 740, the effects of the changes in tax rates and laws are recognized in the period in which the new legislation is enacted. Therefore, Synovus was required to remeasure its deferred tax assets and liabilities and record the adjustment to income tax expense effective December 22, 2017. In December 2017, the SEC issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), which allowed companies to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. Since Federal Tax Reform was enacted late in 2017, management expects that certain deferred tax assets and liabilities will continue to be evaluated in the context of Federal Tax Reform through the date of the filing of our 2017 federal income tax return, and may change as a result of evolving management interpretations, elections, and assumptions, as well as new guidance that may be issued by the Internal Revenue Service. Accordingly, the federal income tax expense of $47.2 million recorded in 2017 relating to the effects from Federal Tax Reform is considered provisional. Management expects to complete its analysis within the measurement period in accordance with SAB 118. Recently Adopted Accounting Standards Updates ASU 2014-09, Revenue from Contracts with Customers (Topic 606) issued by the FASB in May 2014 , and all subsequent ASUs that modified 606. ASU 2014-09 implements a common revenue standard that establishes principles for reporting information about the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts to provide goods or services to customers. The core principle of the revenue model is that a company will recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The scope of the guidance explicitly excludes net interest income as well as many other revenues from financial assets. Management reviewed its revenue streams and contracts with customers and did not identify material changes to the timing or amount of revenue recognition. Synovus adopted these ASUs on the required effective date of January 1, 2018 utilizing the modified retrospective method of adoption. The adoption resulted in a cumulative effect adjustment of ($685) thousand to the opening balance of retained earnings. Beginning January 1, 2018, in connection with the adoption of this standard, Synovus began including merchant discounts and other card-related fees in card fees. For periods prior to January 1, 2018, these amounts were previously presented in other non-interest income and have been reclassified for comparability. See "Part I - Item 1. Financial Statements and Supplementary Data - Note 12 - Non-interest Income" for the required disclosures in accordance with this ASU. ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. In February 2018, the FASB issued final guidance on reclassification of tax effects stranded in other comprehensive income due to Federal Tax Reform. The guidance provides entities the option to reclassify the tax effects that are stranded in accumulated other comprehensive income, or AOCI, as a result of Federal Tax Reform to retained earnings. The guidance is effective for fiscal years beginning after December 15, 2018; early adoption is permitted. Synovus elected to early adopt ASU 2018-02 as of January 1, 2018 and elected to reclassify the income tax effects of Federal Tax Reform from AOCI to retained earnings. For Synovus, tax effects stranded in AOCI due to Federal Tax Reform totaled $7.6 million at December 31, 2017 and primarily related to unrealized losses on the available-for-sale investment securities portfolio. The reclassification adjustment resulted in an increase to retained earnings as of January 1, 2018 of $7.6 million and a corresponding decrease to AOCI for the same amount. ASU 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilitie s. In January 2016, the FASB issued ASU 2016-01 that included targeted amendments to accounting guidance for recognition, measurement, presentation, and disclosure of financial instruments. ASU 2016-01 requires equity investments (except those accounted for under the equity method of accounting or consolidated) to be measured at fair value with changes in fair value recognized in net income. This ASU requires a cumulative-effect adjustment to retained earnings as of the beginning of the reporting period of adoption to reclassify the cumulative change in fair value of equity securities previously recognized in AOCI. ASU 2016-01 became effective for Synovus on January 1, 2018. The adoption of the guidance resulted in a transfer of investments in mutual funds of $3.2 million , at fair value, from investment securities available for sale to other assets and a $117 thousand cumulative-effect adjustment that decreased retained earnings, with offsetting related adjustments to deferred taxes and AOCI. ASU 2016-01 also emphasizes the existing requirement to use an exit price concept to measure fair value for disclosure purposes in determining the fair value of loans. Determination of the fair value under the exit price method requires judgment because substantially all of the loans within the loan portfolio do not have observable market prices. The adoption of this guidance did not have a significant impact on Synovus' fair value disclosures. Reclassifications Prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current periods' presentation.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Acquisitions	Note 2 - Acquisitions Cabela's Transaction On September 25, 2017, Synovus' wholly owned subsidiary, Synovus Bank, completed the acquisition of certain assets and assumption of certain liabilities of World's Foremost Bank, or WFB. Immediately following the closing of this transaction, Synovus Bank sold WFB’s credit card assets and related liabilities to Capital One Bank (USA), National Association, a bank subsidiary of Capital One Financial Corporation. Synovus retained WFB’s $1.10 billion brokered time deposits portfolio, which had a weighted average remaining maturity of approximately 2.53 years and a weighted average rate of 1.83% as of September 25, 2017. The transaction was accounted for as an assumption of a liability (accounted for under the asset acquisition model). In accordance with ASC 820, Fair Value Measurements and Disclosures, the brokered time deposit portfolio was recorded at $1.10 billion , which was the amount of cash received for the deposits and represented the estimated fair value of the deposits at the transaction date. Additionally, Synovus received a $75.0 million transaction fee from Cabela’s Incorporated and Capital One, which was recognized into earnings on September 25, 2017 upon closing of the transaction, based on having achieved the recognition criteria outlined in SEC SAB Topic 13.A, Revenue Recognition . Acquisition of Global One On October 1, 2016, Synovus completed its acquisition of all of the outstanding stock of Global One. Prior to its acquisition, Global One was an Atlanta-based private specialty financial services company that provided financing primarily to commercial entities, with all loans fully collateralized by cash value life insurance policies and/or annuities issued by investment grade life insurance companies. Under the terms of the merger agreement, Synovus acquired Global One for an up-front payment of $30 million , consisting of the issuance of 821 thousand shares of Synovus common stock valued at $26.6 million and $3.4 million in cash, with additional payments to Global One's former shareholders over a three to five year period based on earnings from the Global One business, as further discussed below. The acquisition of Global One constituted a business combination. Accordingly, the assets acquired and liabilities assumed were recorded at their estimated fair values on October 1, 2016. The determination of fair value required management to make estimates about discount rates, future expected earnings and cash flows, market conditions, future loan growth, and other future events that are highly subjective in nature and subject to change. During the three months ended September 30, 2017, Synovus completed the determination of the final allocation of the purchase price with respect to the assets acquired and liabilities assumed. Under the terms of the merger agreement, the purchase price includes additional annual payments ("Earnout Payments") to Global One's former shareholders over a three to five year period, with amounts based on a percentage of "Global One Earnings," as defined in the merger agreement. The Earnout Payments consist of shares of Synovus common stock as well as a smaller cash consideration component. The first annual Earnout Payment of stock and cash valued at $6.4 million was made during November 2017. The balance of the earnout liability at June 30, 2018 was $11.3 million based on the estimated fair value of the remaining Earnout Payments.

Share Repurchase Program

Share Repurchase Program	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Share Repurchase Program	Note 3 - Share Repurchase Program On January 23, 2018, Synovus announced a share repurchase program of up to $150 million to be completed during 2018. As of June 30, 2018 , Synovus had repurchased under this program a total of $76.8 million , or 1.5 million shares of its common stock, at an average price of $52.72 per share.

Investment Securities Available

Investment Securities Available for Sale	6 Months Ended
	Jun. 30, 2018
Investments [Abstract]
Investment Securities Available for Sale	Note 4 - Investment Securities Available for Sale The amortized cost, gross unrealized gains and losses, and estimated fair values of investment securities available for sale at June 30, 2018 and December 31, 2017 are summarized below. June 30, 2018 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 122,800 $ — $ (2,167 ) $ 120,633 U.S. Government agency securities 40,753 181 — 40,934 Mortgage-backed securities issued by U.S. Government agencies 111,406 107 (3,569 ) 107,944 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,614,668 59 (87,882 ) 2,526,845 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 1,159,859 139 (43,550 ) 1,116,448 State and municipal securities 115 — — 115 Corporate debt and other debt securities 17,000 186 (143 ) 17,043 Total investment securities available for sale $ 4,066,601 $ 672 $ (137,311 ) $ 3,929,962 December 31, 2017 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 83,608 $ — $ (934 ) $ 82,674 U.S. Government agency securities 10,771 91 — 10,862 Mortgage-backed securities issued by U.S. Government agencies 121,283 519 (1,362 ) 120,440 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,666,818 5,059 (31,354 ) 2,640,523 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 1,135,259 144 (23,404 ) 1,111,999 State and municipal securities 180 — — 180 Corporate debt and other securities 20,320 294 (223 ) 20,391 Total investment securities available for sale $ 4,038,239 $ 6,107 $ (57,277 ) $ 3,987,069 At June 30, 2018 and December 31, 2017 , investment securities with a carrying value of $1.35 billion and $2.00 billion , respectively, were pledged to secure certain deposits and securities sold under repurchase agreements as required by law and contractual agreements. Synovus has reviewed investment securities that are in an unrealized loss position as of June 30, 2018 and December 31, 2017 for OTTI and does not consider any securities in an unrealized loss position to be other-than-temporarily impaired. If Synovus intended to sell a security in an unrealized loss position, the entire unrealized loss would be reflected in earnings. Synovus does not intend to sell investment securities in an unrealized loss position prior to the recovery of the unrealized loss, which may not be until maturity, and has the ability and intent to hold those securities for that period of time. Additionally, Synovus is not currently aware of any circumstances which will require it to sell any of the securities that are in an unrealized loss position prior to the respective securities' recovery of all such unrealized losses. Declines in the fair value of available for sale securities below their cost that are deemed to have OTTI are reflected in earnings as realized losses to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in other comprehensive income. Currently, unrealized losses on debt securities are attributable to increases in interest rates on comparable securities from the date of purchase. Synovus regularly evaluates its investment securities portfolio to ensure that there are no conditions that would indicate that unrealized losses represent OTTI. These factors include the length of time the security has been in a loss position, the extent that the fair value is below amortized cost, and the credit standing of the issuer. As of June 30, 2018 , Synovus had 80 investment securities in a loss position for less than twelve months and 55 investment securities in a loss position for twelve months or longer. Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at June 30, 2018 and December 31, 2017 are presented below. June 30, 2018 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Treasury securities $ 72,386 $ 1,378 $ 29,255 $ 789 $ 101,641 $ 2,167 Mortgage-backed securities issued by U.S. Government agencies 23,240 632 67,765 2,937 91,005 3,569 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1,703,526 49,197 812,767 38,685 2,516,293 87,882 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 609,505 21,190 412,961 22,360 1,022,466 43,550 Corporate debt and other debt securities — — 1,857 143 1,857 143 Total $ 2,408,657 $ 72,397 $ 1,324,605 $ 64,914 $ 3,733,262 $ 137,311 December 31, 2017 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Treasury securities $ 34,243 $ 443 $ 29,562 $ 491 $ 63,805 $ 934 Mortgage-backed securities issued by U.S. Government agencies 36,810 357 55,740 1,005 92,550 1,362 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1,271,012 10,263 929,223 21,091 2,200,235 31,354 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 653,781 9,497 426,237 13,907 1,080,018 23,404 Corporate debt and other securities — — 5,097 223 5,097 223 Total $ 1,995,846 $ 20,560 $ 1,445,859 $ 36,717 $ 3,441,705 $ 57,277 The amortized cost and fair value by contractual maturity of investment securities available for sale at June 30, 2018 are shown below. The expected life of mortgage-backed securities or CMOs may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. For purposes of the maturity table, mortgage-backed securities and CMOs, which are not due at a single maturity date, have been classified based on the final contractual maturity date. Distribution of Maturities at June 30, 2018 (in thousands) Within One Year 1 to 5 Years 5 to 10 Years More Than 10 Years Total Amortized Cost U.S. Treasury securities $ 18,993 $ 103,807 $ — $ — $ 122,800 U.S. Government agency securities 2,330 6,437 31,986 — 40,753 Mortgage-backed securities issued by U.S. Government agencies — — 27,725 83,681 111,406 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1 1,471 615,334 1,997,862 2,614,668 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 17,355 1,142,504 1,159,859 State and municipal securities 115 — — — 115 Corporate debt and other debt securities — — 15,000 2,000 17,000 Total amortized cost $ 21,439 $ 111,715 $ 707,400 $ 3,226,047 $ 4,066,601 Fair Value U.S. Treasury securities $ 18,993 $ 101,640 $ — $ — $ 120,633 U.S. Government agency securities 2,337 6,455 32,142 — 40,934 Mortgage-backed securities issued by U.S. Government agencies — — 27,266 80,678 107,944 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1 1,520 596,366 1,928,958 2,526,845 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 16,855 1,099,593 1,116,448 State and municipal securities 115 — — — 115 Corporate debt and other debt securities — — 15,186 1,857 17,043 Total fair value $ 21,446 $ 109,615 $ 687,815 $ 3,111,086 $ 3,929,962 Proceeds from sales, gross gains, and gross losses on sales of securities available for sale for the six and three months ended June 30, 2018 and 2017 are presented below. The specific identification method is used to reclassify gains and losses out of other comprehensive income at the time of sale. On January 1, 2018, Synovus transferred $3.2 million , at fair value, from investment securities available for sale to other assets upon adoption of ASU 2016-01. Six Months Ended June 30, Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Proceeds from sales of investment securities available for sale $ 35,066 $ 338,381 $ 35,066 $ 55,752 Gross realized gains on sales — 7,942 — 239 Gross realized losses on sales (1,296 ) (275 ) (1,296 ) (240 ) Investment securities (losses) gains, net $ (1,296 ) $ 7,667 $ (1,296 ) $ (1 )

Restructuring Charges

Restructuring Charges	6 Months Ended
	Jun. 30, 2018
Restructuring Charges [Abstract]
Restructuring Charges	Note 5 - Restructuring Charges For the six and three months ended June 30, 2018 and 2017 , total restructuring charges consist of the following components: Six Months Ended June 30, Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Severance charges $ — $ 6,453 $ — $ — Other charges, net (212 ) 71 103 13 Total restructuring charges, net $ (212 ) $ 6,524 $ 103 $ 13 For the six months ended June 30, 2018 , Synovus recorded net lease termination accrual reversals of $377 thousand related to branches closed in prior years offset somewhat by other property related charges of $165 thousand . During the six months ended June 30, 2017 , Synovus recorded severance charges of $6.5 million including $6.2 million for termination benefits incurred in conjunction with a voluntary early retirement program offered to Synovus employees during the first quarter of 2017. The following tables present aggregate activity within the accrual for restructuring charges for the six and three months ended June 30, 2018 and 2017 : (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2017 $ 336 $ 3,276 $ 3,612 Accruals for lease terminations — (377 ) (377 ) Payments (336 ) (1,031 ) (1,367 ) Balance at June 30, 2018 $ — $ 1,868 $ 1,868 Balance at April 1, 2018 — 2,506 2,506 Payments — (638 ) (638 ) Balance at June 30, 2018 $ — $ 1,868 $ 1,868 (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2016 $ 81 $ 3,968 $ 4,049 Accrual for voluntary and involuntary termination benefits 6,453 — 6,453 Payments (2,803 ) (438 ) (3,241 ) Balance at June 30, 2017 $ 3,731 $ 3,530 $ 7,261 Balance at April 1, 2017 6,315 3,689 10,004 Payments (2,584 ) (159 ) (2,743 ) Balance at June 30, 2017 $ 3,731 $ 3,530 $ 7,261 All other charges were paid in the quarters in which they were incurred. No other restructuring charges resulted in payment accruals.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2018
Loans and Allowance for Loan Losses [Abstract]
Loans and Allowance for Loan Losses	Note 6 - Loans and Allowance for Loan Losses The following is a summary of current, accruing past due, and non-accrual loans by portfolio class as of June 30, 2018 and December 31, 2017 . Current, Accruing Past Due, and Non-accrual Loans June 30, 2018 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 7,170,877 $ 18,425 $ 547 $ 18,972 $ 81,231 $ 7,271,080 Owner-occupied 4,994,038 4,180 98 4,278 6,076 5,004,392 Total commercial and industrial 12,164,915 22,605 645 23,250 87,307 12,275,472 Investment properties 5,505,409 1,838 611 2,449 1,738 5,509,596 1-4 family properties 715,154 2,309 — 2,309 3,247 720,710 Land and development 407,639 1,602 — 1,602 4,624 413,865 Total commercial real estate 6,628,202 5,749 611 6,360 9,609 6,644,171 Home equity lines 1,430,778 8,450 362 8,812 14,265 1,453,855 Consumer mortgages 2,741,064 4,805 244 5,049 4,822 2,750,935 Credit cards 235,406 1,793 1,225 3,018 — 238,424 Other consumer loans 1,783,466 8,990 135 9,125 1,325 1,793,916 Total consumer 6,190,714 24,038 1,966 26,004 20,412 6,237,130 Total loans $ 24,983,831 $ 52,392 $ 3,222 $ 55,614 $ 117,328 $ 25,156,773 (1 ) December 31, 2017 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 7,097,127 $ 11,214 $ 1,016 $ 12,230 $ 70,130 $ 7,179,487 Owner-occupied 4,830,150 6,880 479 7,359 6,654 4,844,163 Total commercial and industrial 11,927,277 18,094 1,495 19,589 76,784 12,023,650 Investment properties 5,663,665 2,506 90 2,596 3,804 5,670,065 1-4 family properties 775,023 3,545 202 3,747 2,849 781,619 Land and development 476,131 1,609 67 1,676 5,797 483,604 Total commercial real estate 6,914,819 7,660 359 8,019 12,450 6,935,288 Home equity lines 1,490,808 5,629 335 5,964 17,455 1,514,227 Consumer mortgages 2,622,061 3,971 268 4,239 7,203 2,633,503 Credit cards 229,015 1,930 1,731 3,661 — 232,676 Other consumer loans 1,461,223 10,333 226 10,559 1,669 1,473,451 Total consumer 5,803,107 21,863 2,560 24,423 26,327 5,853,857 Total loans $ 24,645,203 $ 47,617 $ 4,414 $ 52,031 $ 115,561 $ 24,812,795 (2 ) (1) Total before net deferred fees and costs of $22.7 million . (2) Total before net deferred fees and costs of $25.3 million . The credit quality of the loan portfolio is reviewed and updated no less frequently than quarterly using the standard asset classification system utilized by the federal banking agencies. These classifications are divided into three groups – Not Criticized (Pass), Special Mention, and Classified or Adverse rating (Substandard, Doubtful, and Loss) and are defined as follows: Pass - loans which are well protected by the current net worth and paying capacity of the obligor (or guarantors, if any) or by the fair value, less cost to acquire and sell in a timely manner, of any underlying collateral. Special Mention - loans which have potential weaknesses that deserve management's close attention. These loans are not adversely classified and do not expose an institution to sufficient risk to warrant an adverse classification. Substandard - loans which are inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. Loans with this classification are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Doubtful - loans which have all the weaknesses inherent in loans classified as Substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently known facts, conditions, and values. Loss - loans which are considered by management to be uncollectible and of such little value that their continuance on the institution's books as an asset, without establishment of a specific valuation allowance or charge-off, is not warranted. In the following tables, consumer loans are generally assigned a risk grade similar to the classifications described above; however, upon reaching 90 days and 120 days past due, they are generally downgraded to Substandard and Loss, respectively, in accordance with the FFIEC Uniform Retail Credit Classification and Account Management Policy. Additionally, in accordance with the Interagency Supervisory Guidance on Allowance for Loan and Lease Losses Estimation Practices for Loans and Lines of Credit Secured by Junior Liens on 1-4 Family Residential Properties, the risk grade classifications of home equity lines and consumer mortgages secured by junior liens on 1-4 family residential properties also consider available information on the payment status of any associated senior liens with other financial institutions. Loan Portfolio Credit Exposure by Risk Grade June 30, 2018 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Commercial, financial and agricultural $ 6,996,081 $ 107,251 $ 164,581 $ 3,167 $ — $ 7,271,080 Owner-occupied 4,873,936 63,373 67,010 73 — 5,004,392 Total commercial and industrial 11,870,017 170,624 231,591 3,240 — 12,275,472 Investment properties 5,422,727 51,279 35,590 — — 5,509,596 1-4 family properties 698,532 9,245 12,933 — — 720,710 Land and development 369,071 29,612 12,053 3,129 — 413,865 Total commercial real estate 6,490,330 90,136 60,576 3,129 — 6,644,171 Home equity lines 1,435,724 — 16,599 175 1,357 (3) 1,453,855 Consumer mortgages 2,743,245 — 7,588 102 — (3) 2,750,935 Credit cards 237,198 — 447 — 779 (4) 238,424 Other consumer loans 1,792,568 — 1,087 257 4 (3) 1,793,916 Total consumer 6,208,735 — 25,721 534 2,140 6,237,130 Total loans $ 24,569,082 $ 260,760 $ 317,888 $ 6,903 $ 2,140 $ 25,156,773 (5 ) December 31, 2017 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Commercial, financial and agricultural $6,929,506 $115,912 $132,818 $1,251 $ — $7,179,487 Owner-occupied 4,713,877 50,140 80,073 73 — 4,844,163 Total commercial and industrial 11,643,383 166,052 212,891 1,324 — 12,023,650 Investment properties 5,586,792 64,628 18,645 — — 5,670,065 1-4 family properties 745,299 19,419 16,901 — — 781,619 Land and development 431,759 33,766 14,950 3,129 — 483,604 Total commercial real estate 6,763,850 117,813 50,496 3,129 — 6,935,288 Home equity lines 1,491,105 — 21,079 285 1,758 (3) 1,514,227 Consumer mortgages 2,622,499 — 10,607 291 106 (3) 2,633,503 Credit cards 230,945 — 399 — 1,332 (4) 232,676 Other consumer loans 1,470,944 — 2,168 329 10 (3) 1,473,451 Total consumer 5,815,493 — 34,253 905 3,206 5,853,857 Total loans $ 24,222,726 $ 283,865 $ 297,640 $ 5,358 $ 3,206 $ 24,812,795 (6 ) (1) Includes $209.6 million and $190.6 million of Substandard accruing loans at June 30, 2018 and December 31, 2017 , respectively. (2) The loans within this risk grade are on non-accrual status. Commercial loans generally have an allowance for loan losses in accordance with ASC 310, and retail loans generally have an allowance for loan losses equal to 50% of the loan amount. (3) The loans within this risk grade are on non-accrual status and have an allowance for loan losses equal to the full loan amount. (4) Represent amounts that were 120 days past due. These credits are downgraded to the Loss category with an allowance for loan losses equal to the full loan amount and are generally charged off upon reaching 181 days past due in accordance with the FFIEC Uniform Retail Credit Classification and Account Management Policy. (5) Total before net deferred fees and costs of $22.7 million . (6) Total before net deferred fees and costs of $25.3 million . The following table details the changes in the allowance for loan losses by loan segment for the six and three months ended June 30, 2018 and 2017 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Six Months Ended June 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 126,803 $ 74,998 $ 47,467 $ 249,268 Charge-offs (23,786 ) (2,446 ) (9,894 ) (36,126 ) Recoveries 3,995 6,964 3,058 14,017 Provision for loan losses 23,323 (4,311 ) 5,554 24,566 Ending balance (1) $ 130,335 $ 75,205 $ 46,185 $ 251,725 Ending balance: individually evaluated for impairment $ 9,474 $ 4,687 $ 771 $ 14,932 Ending balance: collectively evaluated for impairment $ 120,861 $ 70,518 $ 45,414 $ 236,793 Loans: Ending balance: total loans (1)(2) $ 12,275,472 $ 6,644,171 $ 6,237,130 $ 25,156,773 Ending balance: individually evaluated for impairment $ 107,544 $ 53,805 $ 27,676 $ 189,025 Ending balance: collectively evaluated for impairment $ 12,167,928 $ 6,590,366 $ 6,209,454 $ 24,967,748 As Of and For The Six Months Ended June 30, 2017 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 125,778 $ 81,816 $ 44,164 $ 251,758 Charge-offs (19,535 ) (3,207 ) (9,656 ) (32,398 ) Recoveries 3,282 3,648 2,871 9,801 Provision for loan losses 13,912 (4,730 ) 9,752 18,934 Ending balance (1) $ 123,437 $ 77,527 $ 47,131 $ 248,095 Ending balance: individually evaluated for impairment $ 7,226 $ 4,386 $ 1,038 $ 12,650 Ending balance: collectively evaluated for impairment $ 116,211 $ 73,141 $ 46,093 $ 235,445 Loans: Ending balance: total loans (1)(3) $ 11,742,945 $ 7,422,234 $ 5,291,371 $ 24,456,550 Ending balance: individually evaluated for impairment $ 122,889 $ 73,638 $ 31,688 $ 228,215 Ending balance: collectively evaluated for impairment $ 11,620,056 $ 7,348,596 $ 5,259,683 $ 24,228,335 (1 ) As of and for the six months ended June 30, 2018 and 2017, there were no purchased credit-impaired loans and no allowance for loan losses for purchased credit-impaired loans. (2) Total before net deferred fees and costs of $22.7 million . (3) Total before net deferred fees and costs of $26.0 million . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Three Months Ended June 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 134,745 $ 73,991 $ 49,028 $ 257,764 Charge-offs (15,770 ) (523 ) (5,211 ) (21,504 ) Recoveries 1,635 480 1,560 3,675 Provision for loan losses 9,725 1,257 808 11,790 Ending balance (1) $ 130,335 $ 75,205 $ 46,185 $ 251,725 Ending balance: individually evaluated for impairment $ 9,474 $ 4,687 $ 771 $ 14,932 Ending balance: collectively evaluated for impairment $ 120,861 $ 70,518 $ 45,414 $ 236,793 Loans: Ending balance: total loans (1)(2) $ 12,275,472 $ 6,644,171 $ 6,237,130 $ 25,156,773 Ending balance: individually evaluated for impairment $ 107,544 $ 53,805 $ 27,676 $ 189,025 Ending balance: collectively evaluated for impairment $ 12,167,928 $ 6,590,366 $ 6,209,454 $ 24,967,748 As Of and For The Three Months Ended June 30, 2017 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 127,096 $ 78,314 $ 48,104 $ 253,514 Charge-offs (12,642 ) (1,299 ) (5,722 ) (19,663 ) Recoveries 1,458 759 1,767 3,984 Provision for loan losses 7,525 (247 ) 2,982 10,260 Ending balance (1) $ 123,437 $ 77,527 $ 47,131 $ 248,095 Ending balance: individually evaluated for impairment $ 7,226 $ 4,386 $ 1,038 $ 12,650 Ending balance: collectively evaluated for impairment $ 116,211 $ 73,141 $ 46,093 $ 235,445 Loans: Ending balance: total loans (1)(3) $ 11,742,945 $ 7,422,234 $ 5,291,371 $ 24,456,550 Ending balance: individually evaluated for impairment $ 122,889 $ 73,638 $ 31,688 $ 228,215 Ending balance: collectively evaluated for impairment $ 11,620,056 $ 7,348,596 $ 5,259,683 $ 24,228,335 (1 ) As of and for the three months ended June 30, 2018 and 2017 , there were no purchased credit-impaired loans and no allowance for loan losses for purchased credit-impaired loans. (2) Total before net deferred fees and costs of $22.7 million . (3) Total before net deferred fees and costs of $26.0 million . The tables below summarize impaired loans (including accruing TDRs) as of June 30, 2018 and December 31, 2017 . Impaired Loans (including accruing TDRs) June 30, 2018 Six Months Ended June 30, 2018 Three Months Ended June 30, 2018 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial, financial and agricultural $ 21,549 $ 32,458 $ — $ 11,129 $ — $ 13,575 $ — Owner-occupied — — — — — — — Total commercial and industrial 21,549 32,458 — 11,129 — 13,575 — Investment properties — — — — — — — 1-4 family properties — — — — — — — Land and development — — — 19 — — — Total commercial real estate — — — 19 — — — Home equity lines — — — 1,423 — 724 — Consumer mortgages 62 87 — 1,330 — 1,780 — Credit cards — — — — — — — Other consumer loans — — — — — — — Total consumer 62 87 — 2,753 — 2,504 — Total impaired loans with no related allowance recorded $ 21,611 $ 32,545 $ — $ 13,901 $ — $ 16,079 $ — With allowance recorded Commercial, financial and agricultural $ 45,171 $ 45,385 $ 6,813 $ 62,564 $ 428 $ 57,930 $ 155 Owner-occupied 40,824 40,884 2,660 38,073 730 38,432 373 Total commercial and industrial 85,995 86,269 9,473 100,637 1,158 96,362 528 Investment properties 24,218 24,218 1,659 23,604 418 24,439 220 1-4 family properties 10,458 10,458 309 11,466 442 11,217 226 Land and development 19,129 20,869 2,720 18,280 150 18,428 74 Total commercial real estate 53,805 55,545 4,688 53,350 1,010 54,084 520 Home equity lines 3,915 3,915 174 3,822 76 3,262 30 Consumer mortgages 18,767 18,767 350 19,283 394 19,459 199 Credit cards — — — — — 4,985 — Other consumer loans 4,932 4,938 248 5,188 143 — 72 Total consumer 27,614 27,620 772 28,293 613 27,706 301 Total impaired loans with allowance recorded $ 167,414 $ 169,434 $ 14,933 $ 182,280 $ 2,781 $ 178,152 $ 1,349 Total impaired loans Commercial, financial and agricultural $ 66,720 $ 77,843 $ 6,813 $ 73,693 $ 428 $ 71,505 $ 155 Owner-occupied 40,824 40,884 2,660 38,073 730 38,432 373 Total commercial and industrial 107,544 118,727 9,473 111,766 1,158 109,937 528 Investment properties 24,218 24,218 1,659 23,604 418 24,439 220 1-4 family properties 10,458 10,458 309 11,466 442 11,217 226 Land and development 19,129 20,869 2,720 18,299 150 18,428 74 Total commercial real estate 53,805 55,545 4,688 53,369 1,010 54,084 520 Home equity lines 3,915 3,915 174 5,245 76 3,986 30 Consumer mortgages 18,829 18,854 350 20,613 394 21,239 199 Credit cards — — — — — 4,985 — Other consumer loans 4,932 4,938 248 5,188 143 — 72 Total consumer 27,676 27,707 772 31,046 613 30,210 301 Total impaired loans $ 189,025 $ 201,979 $ 14,933 $ 196,181 $ 2,781 $ 194,231 $ 1,349 Impaired Loans (including accruing TDRs) December 31, 2017 Year Ended December 31, 2017 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial, financial and agricultural $ 8,220 $ 9,576 $ — $ 21,686 $ — Owner-occupied — — — 6,665 — Total commercial and industrial 8,220 9,576 — 28,351 — Investment properties — — — 123 — 1-4 family properties — — — 323 — Land and development 56 1,740 — 1,816 — Total commercial real estate 56 1,740 — 2,262 — Home equity lines 2,746 2,943 — 1,205 — Consumer mortgages — — — 496 — Credit cards — — — — — Other consumer loans — — — — — Total consumer 2,746 2,943 — 1,701 — Total impaired loans with no related allowance recorded $ 11,022 $ 14,259 $ — $ 32,314 $ — With allowance recorded Commercial, financial and agricultural $ 65,715 $ 65,851 $ 7,406 $ 50,468 $ 1,610 Owner-occupied 37,399 37,441 2,109 40,498 1,382 Total commercial and industrial 103,114 103,292 9,515 90,966 2,992 Investment properties 23,364 23,364 1,100 28,749 1,144 1-4 family properties 15,056 15,056 504 16,257 925 Land and development 18,420 18,476 2,636 23,338 404 Total commercial real estate 56,840 56,896 4,240 68,344 2,473 Home equity lines 5,096 5,096 114 7,476 334 Consumer mortgages 18,668 18,668 569 19,144 896 Credit cards — — — — — Other consumer loans 5,546 5,546 470 4,765 266 Total consumer 29,310 29,310 1,153 31,385 1,496 Total impaired loans with allowance recorded $ 189,264 $ 189,498 $ 14,908 $ 190,695 $ 6,961 Total impaired loans Commercial, financial and agricultural $ 73,935 $ 75,427 $ 7,406 $ 72,154 $ 1,610 Owner-occupied 37,399 37,441 2,109 47,163 1,382 Total commercial and industrial 111,334 112,868 9,515 119,317 2,992 Investment properties 23,364 23,364 1,100 28,872 1,144 1-4 family properties 15,056 15,056 504 16,580 925 Land and development 18,476 20,216 2,636 25,154 404 Total commercial real estate 56,896 58,636 4,240 70,606 2,473 Home equity lines 7,842 8,039 114 8,681 334 Consumer mortgages 18,668 18,668 569 19,640 896 Credit cards — — — — — Other consumer loans 5,546 5,546 470 4,765 266 Total consumer 32,056 32,253 1,153 33,086 1,496 Total impaired loans $ 200,286 $ 203,757 $ 14,908 $ 223,009 $ 6,961 The average recorded investment in impaired loans was $233.8 million and $232.5 million respectively for the six and three months ended June 30, 2017. Excluding accruing TDRs, there was no interest income recognized for the investment in impaired loans for the six and three months ended June 30, 2017. Interest income recognized for accruing TDRs was $3.5 million and $1.8 million respectively for the six and three months ended June 30, 2017. At June 30, 2018 and December 31, 2017 , impaired loans of $63.7 million and $49.0 million , respectively, were on non-accrual status. Concessions provided in a TDR are primarily in the form of providing a below market interest rate given the borrower's credit risk, a period of time generally less than one year with a reduction of required principal and/or interest payments (e.g., interest only for a period of time), or an extension of the maturity of the loan generally for less than one year. Insignificant periods of reduction of principal and/or interest payments, or one-time deferrals of 3 months or less, are generally not considered to be financial concessions. The following tables represent, by concession type, the post-modification balance for loans modified or renewed during the six and three months ended June 30, 2018 and 2017 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Six Months Ended June 30, 2018 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 14 $ — $ — $ 1,565 $ 1,565 Owner-occupied 6 — 4,799 684 5,483 Total commercial and industrial 20 — 4,799 2,249 7,048 Investment properties 3 — 6,011 2,215 8,226 1-4 family properties 7 — 965 492 1,457 Land and development 3 — — 1,786 1,786 Total commercial real estate 13 — 6,976 4,493 11,469 Home equity lines 3 — 172 148 320 Consumer mortgages 14 — 4,695 87 4,782 Credit cards — — — — — Other consumer loans 31 — 925 821 1,746 Total consumer 48 — 5,792 1,056 6,848 Total TDRs 81 $ — $ 17,567 $ 7,798 $ 25,365 (1 ) Three Months Ended June 30, 2018 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 5 $ — $ — $ 576 $ 576 Owner-occupied 4 — 2,094 592 2,686 Total commercial and industrial 9 — 2,094 1,168 3,262 Investment properties 2 — 6,011 256 6,267 1-4 family properties 1 — — 492 492 Land and development 3 — — 1,786 1,786 Total commercial real estate 6 — 6,011 2,534 8,545 Home equity lines 3 — 172 148 320 Consumer mortgages 7 — 2,963 87 3,050 Credit cards — — — — — Other consumer loans 17 — 388 313 701 Total consumer 27 — 3,523 548 4,071 Total TDRs 42 $ — $ 11,628 $ 4,250 $ 15,878 (1 ) (1) No net charge-offs were recorded during the six and three months ended June 30, 2018 upon restructuring of these loans. TDRs by Concession Type Six Months Ended June 30, 2017 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 28 $ — $ 5,760 $ 6,279 $ 12,039 Owner-occupied 1 — — 22 22 Total commercial and industrial 29 — 5,760 6,301 12,061 Investment properties — — — — — 1-4 family properties 16 — 2,089 513 2,602 Land and development 1 — — 135 135 Total commercial real estate 17 — 2,089 648 2,737 Home equity lines — — — — — Consumer mortgages 1 — — 9 9 Credit cards — — — — — Other consumer loans 8 — — 570 570 Total consumer 9 — — 579 579 Total TDRs 55 $ — $ 7,849 $ 7,528 $ 15,377 (2 ) Three Months Ended June 30, 2017 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 10 $ — $ 1,895 $ 740 $ 2,635 Owner-occupied 1 — — 22 22 Total commercial and industrial 11 — 1,895 762 2,657 Investment properties — — — — — 1-4 family properties 8 — 478 196 674 Land and development 1 — — 135 135 Total commercial real estate 9 — 478 331 809 Home equity lines — — — — — Consumer mortgages 1 — — 9 9 Credit cards — — — — — Other consumer loans 5 — — 295 295 Total consumer 6 — — 304 304 Total TDRs 26 $ — $ 2,373 $ 1,397 $ 3,770 (2 ) (2) No net charge-offs were recorded during the six and three months ended June 30, 2017 upon restructuring of these loans. For both the six and three months ended June 30, 2018 there were eight defaults with a recorded investment of $10.5 million on accruing TDRs restructured during the previous twelve months (defaults are defined as the earlier of the TDR being placed on non-accrual status or reaching 90 days past due with respect to principal and/or interest payments) compared to three defaults for both the six and three months ended June 30, 2017 with a recorded investment of $292 thousand . If, at the time a loan was designated as a TDR, the loan was not already impaired, the measurement of impairment that resulted from the TDR designation closely approximates the reserve derived through specific loan measurement of impairment in accordance with ASC 310-10-35. Generally, the change in the allowance for loan losses resulting from such TDR designation is not significant. At June 30, 2018 , the allowance for loan losses allocated to accruing TDRs totaling $125.3 million was $6.5 million compared to accruing TDRs of $151.3 million with an allocated allowance for loan losses of $8.7 million at December 31, 2017 . Non-accrual, non-homogeneous loans (commercial-type impaired loans greater than $1 million ) that are designated as TDRs are individually measured for the amount of impairment, if any, both before and after the TDR designation .

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Other Comprehensive Income (Loss)	Note 7 - Other Comprehensive Income (Loss) The following tables illustrate activity within the balances in accumulated other comprehensive income (loss) by component for the six and three months ended June 30, 2018 and 2017 . Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) (in thousands) Net unrealized gains (losses) on cash flow hedges Net unrealized gains (losses) on investment securities available for sale Post-retirement unfunded health benefit Total Balance at December 31, 2017 $ (12,137 ) $ (43,470 ) $ 853 $ (54,754 ) Other comprehensive income (loss) before reclassifications — (64,409 ) — (64,409 ) Amounts reclassified from accumulated other comprehensive income (loss) — 960 (46 ) 914 Net current period other comprehensive loss — (63,449 ) (46 ) (63,495 ) Reclassification from adoption of ASU 2018-02 — (7,763 ) 175 (7,588 ) Cumulative-effect adjustment from adoption of ASU 2016-01 — 117 — 117 Balance as of June 30, 2018 $ (12,137 ) $ (114,565 ) $ 982 $ (125,720 ) Balance as of April 1, 2018 $ (12,137 ) $ (96,647 ) $ 1,007 $ (107,777 ) Other comprehensive income (loss) before reclassifications — (18,878 ) — (18,878 ) Amounts reclassified from accumulated other comprehensive income (loss) — 960 (25 ) 935 Net current period other comprehensive income — (17,918 ) (25 ) (17,943 ) Balance as of June 30, 2018 $ (12,137 ) $ (114,565 ) $ 982 $ (125,720 ) (in thousands) Net unrealized gains (losses) on cash flow hedges Net unrealized gains (losses) on investment securities available for sale Post-retirement unfunded health benefit Total Balance at December 31, 2016 $ (12,217 ) $ (44,324 ) $ 882 $ (55,659 ) Other comprehensive income before reclassifications — 12,453 — 12,453 Amounts reclassified from accumulated other comprehensive income (loss) 80 (4,715 ) (24 ) (4,659 ) Net current period other comprehensive income 80 7,738 (24 ) 7,794 Balance as of June 30, 2017 $ (12,137 ) $ (36,586 ) $ 858 $ (47,865 ) Balance as of April 1, 2017 $ (12,177 ) $ (43,444 ) $ 870 $ (54,751 ) Other comprehensive income before reclassifications — 6,857 — 6,857 Amounts reclassified from accumulated other comprehensive income (loss) 40 1 (12 ) 29 Net current period other comprehensive income (loss) 40 6,858 (12 ) 6,886 Balance as of June 30, 2017 $ (12,137 ) $ (36,586 ) $ 858 (47,865 ) In accordance with ASC 740-20-45-11(b), a deferred tax asset valuation allowance associated with unrealized gains and losses not recognized in income is charged directly to other comprehensive income (loss). During the years 2010 and 2011, Synovus recorded a deferred tax asset valuation allowance associated with net unrealized losses not recognized in income directly to other comprehensive income (loss) by applying the portfolio approach for allocation of the valuation allowance. Synovus has consistently applied the portfolio approach which treats derivative instruments and available for sale securities as a single portfolio. As of June 30, 2018 , the ending balance in net unrealized gains (losses) on cash flow hedges and net unrealized gains (losses) on investment securities available for sale includes unrealized losses of $12.1 million and $13.3 million , respectively, related to the residual tax effects remaining in OCI due to the previously established deferred tax asset valuation allowance. Under the portfolio approach, these unrealized losses are realized at the time the entire portfolio is sold or disposed. Reclassifications out of Accumulated Other Comprehensive Income (Loss) Details About Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in the Statement Where Net Income is Presented For the Six Months Ended June 30, 2018 2017 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ — $ (130 ) Interest expense — 50 Income tax (expense) benefit $ — $ (80 ) Reclassifications, net of income taxes Net unrealized gains on investment securities available for sale: Realized (losses) gains on sale of securities $ (1,296 ) $ 7,667 Investment securities gains, net 336 (2,952 ) Income tax (expense) benefit $ (960 ) $ 4,715 Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 68 $ 40 Salaries and other personnel expense (22 ) (16 ) Income tax (expense) benefit $ 46 $ 24 Reclassifications, net of income taxes Details About Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in the Statement Where Net Income is Presented For the Three Months Ended June 30, 2018 2017 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ — $ (65 ) Interest expense — 25 Income tax (expense) benefit $ — $ (40 ) Reclassifications, net of income taxes Net unrealized gains on investment securities available for sale: Realized losses on sale of securities $ (1,296 ) $ (1 ) Investment securities gains, net 336 — Income tax (expense) benefit $ (960 ) $ (1 ) Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 34 $ 20 Salaries and other personnel expense (9 ) (8 ) Income tax (expense) benefit $ 25 $ 12 Reclassifications, net of income taxes

Fair Value Accounting

Fair Value Accounting	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Accounting	Note 8 - Fair Value Accounting Synovus carries various assets and liabilities at fair value based on the fair value accounting guidance under ASC 820, Fair Value Measurements , and ASC 825, Financial Instruments . Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an “exit price”) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Fair Value Hierarchy Synovus determines the fair value of its financial instruments based on the fair value hierarchy established under ASC 820-10, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the financial instrument's fair value measurement in its entirety. There are three levels of inputs that may be used to measure fair value. The three levels of inputs of the valuation hierarchy are defined below: Level 1 Quoted prices (unadjusted) in active markets for identical assets and liabilities for the instrument or security to be valued. Level 1 assets include U.S. Treasury securities and mutual funds. Level 2 Observable inputs other than Level 1 quoted prices, such as quoted prices for similar assets and liabilities in active markets, quoted prices in markets that are not active or model-based valuation techniques for which all significant assumptions are derived principally from or corroborated by observable market data. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose value is determined by using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. U.S. Government sponsored agency securities, mortgage-backed securities issued by GSEs and agencies, obligations of states and municipalities, collateralized mortgage obligations issued by GSEs, and mortgage loans held-for-sale are generally included in this category. Level 3 Unobservable inputs that are supported by little, if any, market activity for the asset or liability. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow models and similar techniques, and may also include the use of market prices of assets or liabilities that are not directly comparable to the subject asset or liability. These methods of valuation may result in a significant portion of the fair value being derived from unobservable assumptions that reflect Synovus' own estimates for assumptions that market participants would use in pricing the asset or liability. This category primarily includes collateral-dependent impaired loans, other loans held for sale, other real estate, certain corporate securities, private equity investments, GGL/SBA loan servicing assets, and the earnout liability. See "Part II - Item 8. Financial Statements and Supplementary Data - Note 15 - Fair Value Accounting" to the consolidated financial statements of Synovus' 2017 Form 10-K for a description of valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table presents all financial instruments measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017 , according to the valuation hierarchy included in ASC 820-10. For debt securities, class was determined based on the nature and risks of the investments. Synovus did not have any transfers between levels during the six and three months ended June 30, 2018 and year ended December 31, 2017 . June 30, 2018 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities $ — $ 17,164 $ — $ 17,164 Mortgage-backed securities issued by U.S. Government agencies — 577 — 577 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 409 — 409 State and municipal securities — 2,495 — 2,495 Other investments 906 — — 906 Total trading securities $ 906 $ 20,645 $ — $ 21,551 Mortgage loans held for sale — 53,673 — 53,673 Investment securities available for sale: U.S. Treasury securities 120,633 — — 120,633 U.S. Government agency securities — 40,934 — 40,934 Mortgage-backed securities issued by U.S. Government agencies — 107,944 — 107,944 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,526,845 — 2,526,845 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 1,116,448 — 1,116,448 State and municipal securities — 115 — 115 Corporate debt and other debt securities (1) — 15,186 1,857 17,043 Total investment securities available for sale $ 120,633 $ 3,807,472 $ 1,857 $ 3,929,962 Private equity investments — — 12,678 12,678 Mutual funds 3,124 — — 3,124 Mutual funds held in rabbi trusts 13,638 — — 13,638 GGL/SBA loans servicing asset — — 4,186 4,186 Derivative assets: Interest rate contracts — 10,034 — 10,034 Mortgage derivatives (2) — 1,302 — 1,302 Total derivative assets $ — $ 11,336 $ — $ 11,336 Liabilities Trading account liabilities — 12,328 — 12,328 Earnout liability (3) — — 11,348 11,348 Derivative liabilities: Interest rate contracts — 19,303 — 19,303 Mortgage derivatives (2) — 248 — 248 Visa derivative — — 5,943 5,943 Total derivative liabilities $ — $ 19,551 $ 5,943 $ 25,494 December 31, 2017 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: Mortgage-backed securities issued by U.S. Government agencies $ — $ 3,002 $ — $ 3,002 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 296 — 296 Other investments 522 — — 522 Total trading securities $ 522 $ 3,298 $ — $ 3,820 Mortgage loans held for sale — 48,024 — 48,024 Investment securities available for sale: U.S. Treasury securities 82,674 — — 82,674 U.S. Government agency securities — 10,862 — 10,862 Mortgage-backed securities issued by U.S. Government agencies — 120,440 — 120,440 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,640,523 — 2,640,523 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 1,111,999 — 1,111,999 State and municipal securities — 180 — 180 Corporate debt and other securities (1) 3,162 15,294 1,935 20,391 Total investment securities available for sale $ 85,836 $ 3,899,298 $ 1,935 $ 3,987,069 Private equity investments — — 15,771 15,771 Mutual funds held in rabbi trusts 14,140 — — 14,140 GGL/SBA loan servicing asset — — 4,101 4,101 Derivative assets: Interest rate contracts — 10,786 — 10,786 Mortgage derivatives (2) — 936 — 936 Total derivative assets $ — $ 11,722 $ — $ 11,722 Liabilities Trading account liabilities — 1,000 — 1,000 Earnout liability (3) — — 11,348 11,348 Derivative liabilities: Interest rate contracts — 12,638 — 12,638 Mortgage derivatives (2) — 129 — 129 Visa derivative — — 4,330 4,330 Total derivative liabilities $ — $ 12,767 $ 4,330 $ 17,097 (1) Based on an analysis of the nature and risks of these investments, Synovus has determined that presenting these investments as a single asset class is appropriate. (2) Mortgage derivatives consist of customer interest rate lock commitments that relate to the potential origination of mortgage loans, which would be classified as held for sale and forward loan sales commitments with third-party investors. (3) Earnout liability consists of contingent consideration obligation related to the Global One acquisition. Fair Value Option The following table summarizes the difference between the fair value and the unpaid principal balance of mortgage loans held for sale measured at fair value and the changes in fair value of these loans. Mortgage loans held for sale are initially measured at fair value with subsequent changes in fair value recognized in earnings. Changes in fair value are recorded as a component of mortgage banking income in the consolidated statements of income. An immaterial portion of these changes in fair value was attributable to changes in instrument-specific credit risk. Changes in Fair Value Included in Net Income For the Six Months Ended June 30, For the Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Mortgage loans held for sale $ 155 $ 954 $ 40 $ (249 ) Mortgage Loans Held for Sale (in thousands) As of June 30, 2018 As of December 31, 2017 Fair value $ 53,673 $ 48,024 Unpaid principal balance 52,333 46,839 Fair value less aggregate unpaid principal balance $ 1,340 $ 1,185 Changes in Level 3 Fair Value Measurements and Quantitative Information about Level 3 Fair Value Measurements As noted above, Synovus uses significant unobservable inputs in determining the fair value of assets and liabilities classified as Level 3 in the fair value hierarchy. The table below includes a roll-forward of the amounts on the consolidated balance sheet for the six and three months ended June 30, 2018 and 2017 (including the change in fair value) for financial instruments of a material nature that are classified by Synovus within Level 3 of the fair value hierarchy and are measured at fair value on a recurring basis. Transfers between fair value levels are recognized at the end of the reporting period in which the associated changes in inputs occur. During the six and three months ended June 30, 2018 and 2017 , Synovus did not have any transfers between levels in the fair value hierarchy. For the six and three months ended June 30, 2018 , total net losses included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2018 was $6.2 million and $2.7 million, respectively. For the six and three months ended June 30, 2017 , total net losses included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2017 was $2.4 million and $2.1 million , respectively. Six Months Ended June 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset (2) Beginning balance, January 1, 2018 $ 1,935 $ 15,771 $ (4,330 ) $ (11,348 ) $ 4,101 Total (losses) gains realized/unrealized: Included in earnings — (3,093 ) (2,328 ) — (734 ) Unrealized losses included in other comprehensive income (78 ) — — — — Additions — — — — 819 Settlements — — 715 — — Ending balance, June 30, 2018 $ 1,857 $ 12,678 $ (5,943 ) $ (11,348 ) $ 4,186 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2018 $ — $ (3,093 ) $ (2,328 ) $ — $ (734 ) Three Months Ended June 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset Beginning balance, April 1, 2018 $ 1,852 $ 12,715 $ (3,974 ) $ (11,348 ) $ 3,971 Total (losses) gains realized/unrealized: Included in earnings — (37 ) (2,328 ) — (312 ) Unrealized gains included in other comprehensive income 5 — — — — Additions — — — — 527 Settlements — — 359 — — Ending balance, June 30, 2018 $ 1,857 $ 12,678 $ (5,943 ) $ (11,348 ) $ 4,186 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2018 $ — $ (37 ) $ (2,328 ) $ — $ (312 ) Six Months Ended June 30, 2017 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset (2) Beginning balance, January 1, 2017 $ 1,796 $ 25,493 $ (5,768 ) $ (14,000 ) $ — Total (losses) gains realized/unrealized: Included in earnings — (3,166 ) — (1,707 ) (694 ) Unrealized gains (losses) included in other comprehensive income 131 — — — Additions — — — — 539 Sales and settlements — (6,629 ) 715 — — Transfer from amortization method to fair value — — — — 4,452 Measurement period adjustments related to Global One acquisition — — — 1,766 — Ending balance, June 30, 2017 $ 1,927 $ 15,698 $ (5,053 ) $ (13,941 ) $ 4,297 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2017 $ — $ — $ — $ (1,707 ) $ (694 ) Three Months Ended June 30, 2017 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset (2) Beginning balance, April 1, 2017 $ 1,851 $ 23,679 $ (5,412 ) $ (11,421 ) $ 4,178 Total (losses) gains realized/unrealized: Included in earnings — (1,352 ) — (1,707 ) (376 ) Unrealized gains included in other comprehensive income 76 — — — — Additions — — — — 495 Sales and settlements — (6,629 ) 359 — — Measurement period adjustments related to Global One acquisition — — — (813 ) — Ending balance, June 30, 2017 $ 1,927 $ 15,698 $ (5,053 ) $ (13,941 ) $ 4,297 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2017 $ — $ — $ — $ (1,707 ) $ (376 ) (1) Earnout liability consists of contingent consideration obligation related to the Global One acquisition. (2) Effective January 1, 2017, Synovus elected the fair value option for determining the value of the GGL/SBA loans servicing asset. Prior to 2017, Synovus accounted for the GGL/SBA loans servicing asset using the amortization method. The table below provides an overview of the valuation techniques and significant unobservable inputs used in those techniques to measure financial instruments that are classified within Level 3 of the valuation hierarchy and are measured at fair value on a recurring basis. June 30, 2018 December 31, 2017 Valuation Technique Significant Unobservable Input Level 3 Fair Value Range or Weighted Average Level 3 Fair Value Range or Weighted Average Assets and liabilities measured at fair value on a recurring basis Investment Securities Available for Sale - Other Investments: Trust preferred securities Discounted cash flow analysis Credit spread embedded in discount rate $1,857 438 bps $1,935 398 bps Private equity investments Individual analysis of each investee company Multiple factors, including but not limited to, current operations, financial condition, cash flows, evaluation of business management and financial plans, and recently executed financing transactions related to the investee companies 12,678 N/A 15,771 N/A GGL/SBA loans servicing asset Discounted cash flow analysis Discount rate Prepayment speeds 4,186 13.40% 8.64% 4,101 13.16% 7.50% Earnout liability Option pricing methods and Monte Carlo simulation Financial projections of Global One 11,348 N/A 11,348 N/A Visa derivative liability Discounted cash flow analysis Estimated timing of resolution of covered litigation, future cumulative deposits to the litigation escrow for settlement of the covered litigation, and estimated future monthly fees payable to the derivative counterparty 5,943 1-3 years 4,330 1-4 years Assets Measured at Fair Value on a Non-recurring Basis Certain assets are recorded at fair value on a non-recurring basis. These assets are not measured at fair value on an ongoing basis. Non-recurring fair value adjustments typically are a result of the application of lower of cost or fair value accounting or a write-down occurring during the period. For example, if the fair value of an asset in these categories falls below its cost basis, it is considered to be at fair value at the end of the period of the adjustment. The following table presents assets measured at fair value on a non-recurring basis as of the dates indicated for which there was a fair value adjustment during the six months ended June 30, 2018 and year ended December 31, 2017. June 30, 2018 December 31, 2017 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans * $ — $ — $ 12,820 $ 12,820 $ — $ — $ 3,603 $ 3,603 Other loans held for sale — — — — — — 10,197 10,197 Other real estate — — — — — — 3,363 3,363 Other assets held for sale — — 695 695 — — 5,334 5,334 * Collateral-dependent impaired loans that were written down to fair value during the period. Other real estate (ORE) properties are included in other assets on the consolidated balance sheet. The carrying value of ORE at June 30, 2018 and December 31, 2017 was $6.3 million and $3.8 million , respectively. The following table presents fair value adjustments recognized in earnings for the six and three months ended June 30, 2018 and 2017 for assets measured at fair value on a non-recurring basis still held at period-end. Six Months Ended June 30, Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Impaired loans * $ 7,548 $ 5,808 $ 6,828 $ 5,776 Other loans held for sale — 3,519 — — Other real estate — 518 — 280 Other assets held for sale 499 238 499 — * Collateral-dependent impaired loans that were written down to fair value during the period. The table below provides an overview of the valuation techniques and significant unobservable inputs used in those techniques to measure financial instruments that are classified within Level 3 of the valuation hierarchy and are measured at fair value on a non-recurring basis. The range of sensitivities that management utilized in its fair value calculations is deemed acceptable in the industry with respect to the identified financial instruments. June 30, 2018 December 31, 2017 Valuation Technique Significant Unobservable Input Range (Weighted Average) (1) Range (Weighted Average) (1) Assets measured at fair value on a non-recurring basis Collateral dependent impaired loans Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs 0% - 68% (38%) 0% - 10% (7%) 0%-50% (15%) 0%-10% (7%) Other loans held for sale Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs N/A N/A 5% - 99% (54%) 0% - 10% (2%) Other real estate Third-party appraised value of real estate less estimated selling costs Discount to appraised value (2) Estimated selling costs N/A N/A 0%-85% (35%) 0%-10% (7%) Other assets held for sale Third-party appraised value less estimated selling costs or BOV Discount to appraised value (2) Estimated selling costs 27%-43% (42%) 0%-10% (7%) 21%-52% (25%) 0%-10% (7%) (1) The range represents management's estimate of the high and low of the value that would be assigned to a particular input. For assets measured at fair value on a non-recurring basis, the weighted average is the measure of central tendencies; it is not the value that management is using for the asset or liability. (2) Synovus also makes adjustments to the values of the assets listed above for reasons including age of the appraisal, information known by management about the property, such as occupancy rates, changes to the physical condition of the property, and other factors. Fair Value of Financial Instruments The following table presents the carrying and fair values of financial instruments at June 30, 2018 and December 31, 2017 . The fair values represent management’s estimates based on various methodologies and assumptions. For financial instruments that are not recorded at fair value on the balance sheet, such as loans held for investment, interest bearing deposits (including brokered deposits), and long-term debt, the fair value amounts should not be taken as an estimate of the amount that would be realized if all such financial instruments were to be settled immediately. The carrying and estimated fair values of financial instruments, as well as the level within the fair value hierarchy, as of June 30, 2018 and December 31, 2017 are as follows: June 30, 2018 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 1,091,788 $ 1,091,788 $ 1,091,788 $ — $ — Trading account assets 21,551 21,551 906 20,645 — Mortgage loans held for sale 53,673 53,673 — 53,673 — Other loans held for sale 2,733 2,733 — — 2,733 Investment securities available for sale 3,929,962 3,929,962 120,633 3,807,472 1,857 Private equity investments 12,678 12,678 — — 12,678 Mutual funds 3,124 3,124 3,124 — — Mutual funds held in rabbi trusts 13,638 13,638 13,638 — — Loans, net 24,882,331 24,732,689 — — 24,732,689 GGL/SBA loans servicing asset 4,186 4,186 — — 4,186 Derivative assets 11,336 11,336 — 11,336 — Financial liabilities Trading account liabilities 12,328 12,328 — 12,328 — Non-interest bearing deposits 7,630,491 7,630,491 — 7,630,491 — Non-time interest bearing deposits 13,958,048 13,958,048 — 13,958,048 — Time deposits 4,854,149 4,826,356 — 4,826,356 — Total deposits $ 26,442,688 $ 26,414,895 $ — $ 26,414,895 $ — Federal funds purchased, other short-term borrowings and other short-term liabilities 207,580 207,580 207,580 — — Long-term debt 1,656,647 1,658,790 — 1,658,790 — Earnout liabilities 11,348 11,348 — — 11,348 Derivative liabilities 25,494 25,494 — 19,551 5,943 December 31, 2017 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 932,933 $ 932,933 $ 932,933 $ — $ — Trading account assets 3,820 3,820 522 3,298 — Mortgage loans held for sale 48,024 48,024 — 48,024 — Other loans for sale 11,356 11,356 — — 11,356 Investment securities available for sale 3,987,069 3,987,069 85,836 3,899,298 1,935 Private equity investments 15,771 15,771 — — 15,771 Mutual funds held in rabbi trusts 14,140 14,140 14,140 — — Loans, net 24,538,196 24,507,141 — — 24,507,141 GGL/SBA loans servicing asset 4,101 4,101 — — 4,101 Derivative assets 11,722 11,722 — 11,722 — Financial liabilities Trading account liabilities 1,000 1,000 — 1,000 — Non-interest bearing deposits 7,686,339 7,686,339 — 7,686,339 — Non-time interest bearing deposits 13,941,814 13,941,814 — 13,941,814 — Time deposits 4,519,747 4,523,661 — 4,523,661 — Total deposits $ 26,147,900 $ 26,151,814 $ — $ 26,151,814 $ — Federal funds purchased, other short-term borrowings and other short-term liabilities 161,190 161,190 161,190 — — Long-term debt 1,706,138 1,721,814 — 1,721,814 — Earnout liabilities 11,348 11,348 — — 11,348 Derivative liabilities 17,097 17,097 — 12,767 4,330

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2018
Summary of Derivative Instruments [Abstract]
Derivative Instruments	Note 9 - Derivative Instruments As part of its overall interest rate risk management activities, Synovus utilizes derivative instruments to manage its exposure to various types of interest rate risk. These derivative instruments generally consist of interest rate swaps, interest rate lock commitments made to prospective mortgage loan customers, and commitments to sell fixed-rate mortgage loans. Interest rate lock commitments represent derivative instruments since it is intended that such loans will be sold. Synovus may also utilize interest rate swaps to manage interest rate risks primarily arising from its core banking activities. These interest rate swap transactions generally involve the exchange of fixed and floating interest rate payment obligations without the exchange of underlying principal amounts. Swaps may be designated as either cash flow hedges or fair value hedges, as discussed below. As of June 30, 2018 and December 31, 2017 , Synovus had no outstanding interest rate swap contracts utilized to manage interest rate risk related to core banking activities. Synovus is party to master netting arrangements with its dealer counterparties; however, Synovus does not offset assets and liabilities under these arrangements for financial statement presentation purposes. Counterparty Credit Risk and Collateral Entering into derivative contracts potentially exposes Synovus to the risk of counterparties’ failure to fulfill their legal obligations, including, but not limited to, potential amounts due or payable under each derivative contract. Notional principal amounts are often used to express the volume of these transactions, but the amounts potentially subject to credit risk are much smaller. Synovus assesses the credit risk of its dealer counterparties by regularly monitoring publicly available credit rating information, evaluating other market indicators, and periodically reviewing detailed financials. Dealer collateral requirements are determined via risk-based policies and procedures and in accordance with existing agreements. Synovus seeks to minimize dealer credit risk by dealing with highly rated counterparties and by obtaining collateral for exposures above certain predetermined limits. Management closely monitors credit conditions within the customer swap portfolio, which management deems to be of higher risk than dealer counterparties. Collateral is secured at origination and credit related fair value adjustments are recorded against the asset value of the derivative as deemed necessary based upon an analysis, which includes consideration of the current asset value of the swap, customer credit rating, collateral value, and customer standing with regards to its swap contractual obligations and other related matters. Such asset values fluctuate based upon changes in interest rates regardless of changes in notional amounts and changes in customer specific risk. Customer Related Derivative Positions Synovus enters into interest rate swap agreements to facilitate the risk management strategies of a small number of commercial banking customers. Synovus mitigates this risk by entering into equal and offsetting interest rate swap agreements with highly rated counterparties. The interest rate swap agreements are free-standing derivatives and are recorded at fair value on Synovus' consolidated balance sheet. Fair value changes are recorded as a component of non-interest income. As of June 30, 2018 , the notional amount of customer related interest rate derivative financial instruments, including both the customer position and the offsetting position, was $1.67 billion , an increase of $201.4 million compared to December 31, 2017 . Visa Derivative In conjunction with the sale of Class B shares of common stock issued by Visa to Synovus as a Visa USA member, Synovus entered into a derivative contract with the purchaser, which provides for settlements between the parties based upon a change in the ratio for conversion of Visa Class B shares to Visa Class A shares. The conversion ratio changes when Visa deposits funds to a litigation escrow established by Visa to pay settlements for certain litigation, for which Visa is indemnified by Visa USA members. The litigation escrow is funded by proceeds from Visa’s conversion of Class B shares. The fair value of the derivative contract was $5.9 million and $4.3 million at June 30, 2018 and December 31, 2017 , respectively. The fair value of the derivative contract is determined based on management's estimate of the timing and amount of the Covered Litigation settlement, and the resulting payments due to the counterparty under the terms of the contract. During the three months ended June 30, 2018 , Synovus recorded a $2.3 million valuation adjustment to the Visa derivative following Visa's announcement on June 26, 2018 that it would deposit $600 million into its litigation escrow account. Management believes that the estimate of Synovus' exposure to the Visa indemnification and fees associated with the Visa derivative is adequate based on current information, including Visa's recent announcements and disclosures. However, future developments in the litigation could require potentially significant changes to Synovus' estimate. See "Part II - Item 8. Financial Statements and Supplementary Data - Note 18 - Visa Shares and Related Agreements" of Synovus' 2017 Form 10-K for further information. Mortgage Derivatives Synovus originates first lien residential mortgage loans for sale into the secondary market. Mortgage loans are sold by Synovus for conversion to securities and the servicing of these loans is generally sold to a third-party servicing aggregator, or Synovus sells the mortgage loans as whole loans to investors either individually or in bulk on a servicing released basis. Synovus enters into interest rate lock commitments for residential mortgage loans which commits it to lend funds to a potential borrower at a specific interest rate and within a specified period of time. Interest rate lock commitments that relate to the origination of mortgage loans that, if originated, will be held for sale, are considered derivative financial instruments under applicable accounting guidance. Outstanding interest rate lock commitments expose Synovus to the risk that the price of the mortgage loans underlying the commitments may decline due to increases in mortgage interest rates from inception of the rate lock to the funding of the loan. At June 30, 2018 and December 31, 2017 , Synovus had commitments to fund at a locked interest rate, primarily fixed-rate mortgage loans to customers in the amount of $ 69.7 million and $49.3 million , respectively. Fair value adjustments related to these commitments resulted in a gain of $366 thousand and a loss of $(416) thousand for the six months ended June 30, 2018 and 2017 , respectively, which was recorded as a component of mortgage banking income in the consolidated statements of income. At June 30, 2018 and December 31, 2017 , outstanding commitments to sell primarily fixed-rate mortgage loans amounted to $86.0 million and $72.5 million , respectively. Such commitments are entered into to reduce the exposure to market risk arising from potential changes in interest rates, which could affect the fair value of mortgage loans held for sale and outstanding rate lock commitments, which guarantee a certain interest rate if the loan is ultimately funded or granted by Synovus as a mortgage loan held for sale. The commitments to sell mortgage loans are at fixed prices and are scheduled to settle at specified dates that generally do not exceed 90 days. Fair value adjustments related to these outstanding commitments to sell mortgage loans resulted in a loss of $(119) thousand and $(1.7) million for the six months ended June 30, 2018 and 2017 , respectively, which were recorded as a component of mortgage banking income in the consolidated statements of income. Collateral Requirements Pursuant to the Dodd-Frank Act, certain derivative transactions have collateral requirements, both at the inception of the trade and as the value of each derivative position changes. As of June 30, 2018 , collateral totaling $30.6 million of federal funds sold was pledged to the derivative counterparties to comply with collateral requirements. Effective January 3, 2017, the CME amended its rulebook to legally characterize variation margin cash payments for cleared OTC derivatives as settlement rather than as collateral. As a result, in 2017, Synovus began reducing the corresponding derivative asset and liability balances for CME-cleared OTC derivatives to reflect the settlement of those positions via the exchange of variation margin. At June 30, 2018 and December 31, 2017, Synovus had a variation margin of $8.9 million and $1.5 million , respectively, reducing the derivative asset. The impact of derivative instruments on the Consolidated Balance Sheets at June 30, 2018 and December 31, 2017 is presented below. Fair Value of Derivative Assets Fair Value of Derivative Liabilities (in thousands) Location on Consolidated Balance Sheets June 30, 2018 December 31, 2017 Location on Consolidated Balance Sheets June 30, 2018 December 31, 2017 Derivatives not designated as hedging instruments: Interest rate contracts Other assets $ 10,034 $ 10,786 Other liabilities $ 19,303 $ 12,638 Mortgage derivatives Other assets 1,302 936 Other liabilities 248 129 Visa derivative — — Other liabilities 5,943 4,330 Total derivatives not designated as hedging instruments $ 11,336 $ 11,722 $ 25,494 $ 17,097 The pre-tax effect of fair value hedges on the consolidated statements of income for the six and three months ended June 30, 2018 and 2017 is presented below. Location of Gain (Loss) Recognized in Income Gain (Loss) Recognized in Income (in thousands) Six Months Ended June 30, Derivatives not designated as hedging instruments 2018 2017 Interest rate contracts (1) Other non-interest income $ (9 ) $ (1 ) Mortgage derivatives (2) Mortgage banking income 247 (2,073 ) Total $ 238 $ (2,074 ) Location of Gain (Loss) Recognized in Income Gain (Loss) Recognized in Income (in thousands) Three Months Ended June 30, Derivatives not designated as hedging instruments 2018 2017 Interest rate contracts (1) Other non-interest income $ (16 ) $ — Mortgage derivatives (2) Mortgage banking income (680 ) (289 ) Total $ (696 ) $ (289 ) (1) Gain (loss) represents net fair value adjustments (including credit related adjustments) for customer swaps and offsetting positions. (2) Gain (loss) represents net fair value adjustments recorded for interest rate lock commitments and commitments to sell mortgage loans to third-party investors.

Net Income Per Common Share

Net Income Per Common Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Income Per Common Share	Note 10 - Net Income Per Common Share The following table displays a reconciliation of the information used in calculating basic and diluted earnings per common share for the six and three months ended June 30, 2018 and 2017 . Six Months Ended June 30, Three Months Ended June 30, (in thousands, except per share data) 2018 2017 2018 2017 Basic Net Income Per Common Share: Net income available to common shareholders $ 209,229 $ 142,742 $ 108,622 $ 73,444 Weighted average common shares outstanding 118,531 122,251 118,397 122,203 Net income per common share, basic $ 1.77 $ 1.17 $ 0.92 $ 0.60 Diluted Net Income Per Common Share: Net income available to common shareholders $ 209,229 $ 142,742 $ 108,622 $ 73,444 Weighted average common shares outstanding 118,531 122,251 118,397 122,203 Potentially dilutive shares from outstanding equity-based awards and Earnout Payments 698 792 742 824 Weighted average diluted common shares 119,229 123,043 119,139 123,027 Net income per common share, diluted $ 1.75 $ 1.16 $ 0.91 $ 0.60 Basic net income per common share is computed by dividing net income by the average common shares outstanding for the period. Diluted net income per common share reflects the dilution that could occur if securities or other contracts to issue common stock were exercised or converted. The dilutive effect of outstanding stock options and restricted share units is reflected in diluted net income per common share, unless the impact is anti-dilutive, by application of the treasury stock method. As of June 30, 2018 and 2017 , there were 2.2 million potentially dilutive shares related to the Warrant to purchase shares of common stock that were outstanding during 2018 and 2017 but were not included in the computation of diluted net income per common share because the effect would have been anti-dilutive.

Share-based Compensation

Share-based Compensation	6 Months Ended
	Jun. 30, 2018
Share-based Compensation [Abstract]
Share-based Compensation	Note 11 - Share-based Compensation General Description of Share-based Plans Synovus has a long-term incentive plan under which the Compensation Committee of the Board of Directors has the authority to grant share-based awards to Synovus employees. The 2013 Omnibus Plan authorizes 8.6 million common share equivalents available for grant, where grants of options count as one share equivalent and grants of full value awards (e.g., restricted share units, market restricted share units, and performance share units) count as two share equivalents. Any restricted share units that are forfeited and options that expire unexercised will again become available for issuance under the Plan. At June 30, 2018 , Synovus had a total of 4.9 million shares of its authorized but unissued common stock reserved for future grants under the 2013 Omnibus Plan. The Plan permits grants of share-based compensation including stock options, restricted share units, market restricted share units, and performance share units. The grants generally include vesting periods ranging from three to five years and contractual terms of ten years. Vesting for grants made in 2018 accelerates upon retirement for plan participants who have reached age 65 and who also have no less than 10 years of service at the date of their election to retire. Market restricted share units and performance share units are granted at a defined target level and are compared annually to required market and performance metrics to determine actual units vested and compensation expense. Synovus has historically issued new shares to satisfy share option exercises and share unit conversions. Dividend equivalents are paid on outstanding restricted share units, market restricted share units, and performance share units in the form of additional restricted share units that vest over the same vesting period or the vesting period left on the original restricted share unit grant. Share-based Compensation Expense Total share-based compensation expense was $8.3 million and $4.4 million for the six and three months ended June 30, 2018 , respectively, and $6.8 million and $3.5 million for the six and three months ended June 30, 2017 , respectively. Accelerated share-based compensation expense associated with the provision in 2018 of a retirement vesting provision was approximately $200 thousand and $30 thousand for the six and three months ended June 30, 2018 for retirement eligible employees. Stock Options No stock option grants were made during the six months ended June 30, 2018 . At June 30, 2018 , there were 655 thousand outstanding stock options to purchase shares of common stock with a weighted average exercise price of $16.92 per share. Restricted Share Units, Performance Share Units, and Market Restricted Share Units During the six months ended June 30, 2018 , Synovus awarded 234 thousand restricted share units that have a service-based vesting period of three years and awarded 87 thousand performance share units that vest upon service and performance conditions. Synovus also granted 58 thousand market restricted share units during the six months ended June 30, 2018 . The weighted average grant-date fair value of the awarded restricted share units, performance share units and market restricted share units was $47.67 per share. Market restricted share units and performance share units are granted at target and are compared annually to required market and performance metrics. The performance share units vest upon meeting certain service and performance conditions. Return on average assets (ROAA) and return on average tangible common equity (ROATCE) performance is evaluated each year over a three-year performance period, with share distribution determined at the end of the three years. The number of performance share units that will ultimately vest ranges from 0% to 150% of target based on Synovus' three-year weighted average ROAA (as defined) and ROATCE (as defined). The market restricted share units have a three -year service-based vesting component as well as a total shareholder return multiplier. The number of market restricted share units that will ultimately vest ranges from 75% to 125% of target based on Synovus' total shareholder return. At June 30, 2018 , including dividend equivalents granted, there were 910 thousand restricted share units, performance share units and market restricted share units outstanding with a weighted average grant-date fair value of $40.82 per share.

Non-interest Income

Non-interest Income	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Non-interest Income	Note 12 - Non-interest Income The following table reflects revenue disaggregated by revenue type and line of business for the six and three months ended June 30, 2018 and 2017 . Non-interest Income by Line of Business For the Six Months Ended June 30, 2018 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 39,938 $ 11,404 $ 985 $ 26,518 $ — $ 1,031 Fiduciary and asset management fees 27,419 — — — 27,419 — Card fees 21,032 420 — 20,612 — — Brokerage revenue 17,596 — — — 17,596 — Insurance revenue 3,092 — — — 3,092 — Other fees 1,588 — — 1,033 — 555 $ 110,665 $ 11,824 $ 985 $ 48,163 $ 48,107 $ 1,586 Other revenues (1) 29,768 5,841 3,581 3,242 11,408 5,696 Total non-interest income $ 140,433 $ 17,665 $ 4,566 $ 51,405 $ 59,515 $ 7,282 For the Six Months Ended June 30, 2017 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 40,370 $ 11,415 $ 887 $ 26,970 $ — $ 1,098 Fiduciary and asset management fees 24,676 — — — 24,676 — Card fees 19,885 437 — 19,448 — — Brokerage revenue 14,436 — — — 14,436 — Insurance revenue 2,364 — — — 2,364 — Other fees 1,590 — — 1,060 — 530 $ 103,321 $ 11,852 $ 887 $ 47,478 $ 41,476 $ 1,628 Other revenues (1) 37,218 4,641 4,376 3,183 13,413 11,605 Total non-interest income $ 140,539 $ 16,493 $ 5,263 $ 50,661 $ 54,889 $ 13,233 ( 1) Other revenues primarily relate to revenues not derived from contracts with customers. Non-interest Income by Line of Business For the Three Months Ended June 30, 2018 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 19,999 $ 5,724 $ 453 $ 13,096 $ — $ 726 Fiduciary and asset management fees 13,983 — — — 13,983 — Card fees 10,833 215 — 10,618 — — Brokerage revenue 8,900 — — — 8,900 — Insurance revenue 1,879 — — — 1,879 — Other fees 756 — — 474 — 282 $ 56,350 $ 5,939 $ 453 $ 24,188 $ 24,762 $ 1,008 Other revenues (1) 17,037 3,390 1,848 1,713 5,565 4,521 Total non-interest income $ 73,387 $ 9,329 $ 2,301 $ 25,901 $ 30,327 $ 5,529 For the Three Months Ended June 30, 2017 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 20,252 $ 5,644 $ 428 $ 13,533 $ — $ 647 Fiduciary and asset management fees 12,524 — — — 12,524 — Card fees 10,041 218 — 9,823 — — Brokerage revenue 7,210 — — — 7,210 — Insurance revenue 1,060 — — — 1,060 — Other fees 748 — — 486 — 262 $ 51,835 $ 5,862 $ 428 $ 23,842 $ 20,794 $ 909 Other revenues (1) 16,866 2,993 2,758 1,618 6,816 2,681 Total non-interest income $ 68,701 $ 8,855 $ 3,186 $ 25,460 $ 27,610 $ 3,590 ( 1) Other revenues primarily relate to revenues not derived from contracts with customers. Following is a discussion of key revenues within the scope of the new revenue guidance: Service Charges on Deposit Accounts : Revenue from service charges on deposit accounts is earned through cash management, wire transfer, and other deposit-related services, as well as overdraft, non-sufficient funds, account management and other deposit-related fees. Revenue is recognized for these services either over time, corresponding with deposit accounts' monthly cycle, or at a point in time for transaction related services and fees. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers' accounts. Fiduciary and Asset Management Fees : Fiduciary and asset management fees are primarily comprised of fees earned from the management and administration of trusts and other customer assets. Synovus' performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month-end through a direct charge to customers' accounts. Synovus does not earn performance-based incentives. Card Fees: Card fees consist primarily of interchange fees from consumer credit and debit cards processed by card association networks, as well as merchant discounts, and other card related services. Interchange rates are generally set by the credit card associations and based on purchase volumes and other factors. Interchange fees and merchant discounts are recognized concurrently with the delivery of service on a daily basis as transactions occur. Payment is typically received immediately or in the following month. Card fees are reported net of certain associated expense items including loyalty program expenses and network expenses. Brokerage Revenue: Brokerage revenue consists primarily of commissions. Additionally, brokerage revenue includes advisory fees earned from the management of customer assets. Advisory fees for brokerage services are recognized and collected monthly and are based upon the month-end market value of the assets under management at a rate predetermined in the contract. Transactional revenues are based on the size and number of transactions executed at the client's direction and are generally recognized on the trade date with payment received on the settlement date. Insurance Revenue: Insurance revenue primarily consists of commissions received on annuity and life product sales. The commissions are recognized as revenue when the customer executes an insurance policy with the insurance carrier. In some cases, Synovus receives payment of trailing commissions each year when the customer pays its annual premium. For the six and three months ended June 30, 2018 , Synovus recognized an immaterial amount of insurance trailing commissions related to performance obligations satisfied in prior periods. Other Fees: Other fees primarily consist of revenues generated from safe deposit box rental fees and lockbox services. Fees are recognized over time, on a monthly basis, as Synovus' performance obligation for services is satisfied. Payment is received upfront for safe deposit box rentals and in the following month for lockbox services. Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity's obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. Synovus' non-interest revenue streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is often received immediately or shortly after Synovus satisfies its performance obligation and revenue is recognized. Synovus does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances. As of June 30, 2018 and December 31, 2017, Synovus did not have any significant contract balances.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 13 - Commitments and Contingencies In the normal course of business, Synovus enters into commitments to extend credit such as loan commitments and letters of credit to meet the financing needs of its customers. Synovus uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The contractual amount of these financial instruments represents Synovus' maximum credit risk should the counterparty draw upon the commitment, and should the counterparty subsequently fail to perform according to the terms of the contract. Since many of the commitments are expected to expire without being drawn upon, total commitment amounts do not necessarily represent future cash requirements. Additionally, certain commitments (primarily consumer) may generally be canceled by providing notice to the borrower. The allowance for credit losses associated with unfunded commitments and letters of credit is a component of the unfunded commitments reserve recorded within other liabilities on the consolidated balance sheet. Additionally, unearned fees relating to letters of credit are recorded within other liabilities on the consolidated balance sheet. These amounts are not material to Synovus' consolidated balance sheet. Unfunded letters of credit and lending commitments at June 30, 2018 and December 31, 2017 are presented below. (in thousands) June 30, 2018 December 31, 2017 Letters of credit* $ 179,860 $ 153,372 Commitments to fund commercial and industrial loans 5,361,671 5,090,827 Commitments to fund commercial real estate, construction, and land development loans 1,652,834 1,567,583 Commitments under home equity lines of credit 1,179,074 1,137,714 Unused credit card lines 743,376 779,254 Other loan commitments 365,861 351,358 Total unfunded lending commitments and letters of credit $ 9,482,676 $ 9,080,108 * Represent the contractual amount net of risk participations of approximately $70 million and $77 million at June 30, 2018 and December 31, 2017, respectively. Merchant Services In accordance with credit and debit card association rules, Synovus sponsors merchant processing servicers that process credit and debit card transactions on behalf of various merchants. In connection with these services, a liability may arise in the event of a billing dispute between the merchant and a cardholder that is ultimately resolved in the cardholder's favor. If the merchant defaults on its obligation to reimburse the cardholder, the cardholder, through its issuing bank, generally has until six months after the date of the transaction to present a chargeback to the merchant processor, which is primarily liable for any losses on covered transactions. However, if the merchant processor fails to meet its obligation to reimburse the cardholder for disputed transactions, then Synovus, as the sponsor, could be held liable for the disputed amount. Synovus mitigates this risk through its contractual arrangements with the merchant processing servicers and the merchants and by withholding future settlements, by retaining cash reserve accounts or by obtaining other security. During the six months ended June 30, 2018 and 2017, the sponsored entities processed and settled $34.35 billion and $30.42 billion , respectively, in total transactions. For the six months ended June 30, 2018 and 2017, Synovus incurred an immaterial amount of losses in connection with these chargebacks. During July 2018, Synovus began to accrue a receivable for chargebacks associated with one merchant processing relationship. Legal Proceedings Synovus and its subsidiaries are subject to various legal proceedings and claims that arise in the ordinary course of its business. Additionally, in the ordinary course of business, Synovus and its subsidiaries are subject to regulatory examinations, information gathering requests, inquiries and investigations. Synovus, like many other financial institutions, has been the target of numerous legal actions and other proceedings asserting claims for damages and related relief for losses. These actions include claims and counterclaims asserted by individual borrowers related to their loans and allegations of violations of state and federal laws and regulations relating to banking practices, including putative class action matters. In addition to actual damages, if Synovus does not prevail in asserted legal actions, credit-related litigation could result in additional write-downs or charge-offs of loans, which could adversely affect Synovus' results of operations during the period in which the write-down or charge-off were to occur. Synovus carefully examines and considers each legal matter, and, in those situations where Synovus determines that a particular legal matter presents loss contingencies that are both probable and reasonably estimable, Synovus establishes an appropriate accrual. An event is considered to be probable if the future event is likely to occur. While the final outcome of any legal proceeding is inherently uncertain, based on the information currently available, advice of counsel and available insurance coverage, management believes that the amounts accrued with respect to legal matters as of June 30, 2018 are adequate. The actual costs of resolving legal claims may be higher or lower than the amounts accrued. In addition, where Synovus determines that there is a reasonable possibility of a loss in respect of legal matters, Synovus considers whether it is able to estimate the total reasonably possible loss or range of loss. An event is “reasonably possible” if “the chance of the future event or events occurring is more than remote but less than likely.” An event is “remote” if “the chance of the future event or events occurring is more than slight but less than reasonably possible." In many situations, Synovus may be unable to estimate reasonably possible losses due to the preliminary nature of the legal matters, as well as a variety of other factors and uncertainties. For those legal matters where Synovus is able to estimate a range of reasonably possible losses, management currently estimates the aggregate range from our outstanding litigation is from zero to $5 million in excess of the amounts accrued, if any, related to those matters. This estimated aggregate range is based upon information currently available to Synovus, and the actual losses could prove to be lower or higher. As there are further developments in these legal matters, Synovus will reassess these matters, and the estimated range of reasonably possible losses may change as a result of this assessment. Based on Synovus' current knowledge and advice of counsel, management presently does not believe that the liabilities arising from these legal matters will have a material adverse effect on Synovus' consolidated financial condition, results of operations or cash flows. However, it is possible that the ultimate resolution of these legal matters could have a material adverse effect on Synovus' results of operations for any particular period. Synovus intends to vigorously pursue all available defenses to these legal matters, but will also consider other alternatives, including settlement, in situations where there is an opportunity to resolve such legal matters on terms that Synovus considers to be favorable, including in light of the continued expense and distraction of defending such legal matters. Synovus maintains insurance coverage, which may be available to cover legal fees, or potential losses that might be incurred in connection with such legal matters. The above-noted estimated range of reasonably possible losses does not take into consideration insurance coverage which may or may not be available for the respective legal matters.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Note 14 - Subsequent Events Pending Acquisition of FCB Financial Holdings, Inc. On July 23, 2018, Synovus entered into the Merger Agreement by and among Synovus, FCB and Azalea Merger Sub Corp. pursuant to which Synovus will acquire FCB in a reverse triangular merger. At the effective time of the Merger, each outstanding share of FCB Class A common stock, par value $0.001 per share, will be converted into the right to receive, without interest, 1.055 shares of Synovus common stock, par value $1.00 per share. The Merger Agreement has been unanimously approved by both companies’ Board of Directors. The transaction is subject to customary closing conditions, including approval of Synovus and FCB shareholders and approval of state and federal regulators, and is expected to close by the first quarter of 2019. FCB operates 50 full service banking centers through its wholly-owned banking subsidiary, Florida Community Bank. Following closing, Florida Community Bank will merge with and into Synovus Bank and operate under the Synovus brand. Redemption of Series C Preferred Stock On August 1, 2018, Synovus redeemed all 5,200,000 outstanding shares of Series C Preferred Stock for a cash price of $25.00 per share, without interest, for an aggregate redemption price of $130 million and paid a dividend of $2.6 million on the Series C Preferred Stock. The redemption of the Series C Preferred Stock was funded primarily with proceeds from Synovus' public offering of $200 million of Series D Preferred Stock completed on June 21, 2018. Concurrent with the redemption, Synovus will recognize an extinguishment loss of $4.1 million to net income available to common shareholders. The $4.1 million extinguishment loss will be recognized in a manner similar to the treatment of dividends paid on preferred stock during the three months ending September 30, 2018.

Significant Accounting Polici23

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited interim consolidated financial statements have been prepared in accordance with the instructions to the SEC Form 10-Q and Article 10 of Regulation S-X; therefore, they do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, comprehensive income, and cash flows in conformity with GAAP. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the consolidated financial position and results of operations for the periods covered by this Report have been included. The accompanying unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes appearing in Synovus' 2017 Form 10-K . In connection with the adoption of ASU 2016-18, Statement of Cash Flows-Restricted Cash, Synovus changed its presentation of cash and cash equivalents, effective January 1, 2018, to include cash and due from banks as well as interest bearing funds with the Federal Reserve Bank, interest earning deposits with banks, and federal funds sold and securities purchased under resale agreements, which are inclusive of any restricted cash and restricted cash equivalents. Prior to 2018, cash and cash equivalents only included cash and due from banks. Prior periods have been revised to maintain comparability. Excluding the aforementioned presentation change, there have been no significant changes to the accounting policies as disclosed in Synovus' 2017 Form 10-K . In preparing the unaudited interim consolidated financial statements in accordance with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the respective consolidated balance sheets and the reported amounts of revenues and expenses for the periods presented. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, the fair value of investment securities, and the fair value of private equity investments.
Cash and Cash Equivalents	Cash and cash equivalents consist of cash and due from banks, interest bearing funds with the Federal Reserve Bank, interest earning deposits with banks, federal funds sold and securities purchased under resale agreements, and is inclusive of any restricted cash and restricted cash equivalents. Restricted cash and restricted cash equivalents primarily relate to cash held on deposit with the Federal Reserve to meet reserve requirements as well as cash posted as collateral for derivatives in a liability position. At June 30, 2018 and December 31, 2017 , interest bearing funds with the Federal Reserve Bank included $35.7 million and $8.6 million , respectively, on deposit to meet Federal Reserve Bank requirements. Interest earning deposits with banks include $2.7 million and $5.9 million at June 30, 2018 and December 31, 2017 , respectively, which are pledged as collateral in connection with certain letters of credit. Federal funds sold include $30.6 million and $43.8 million at June 30, 2018 and December 31, 2017 , respectively, which are pledged to collateralize certain derivative financial instruments. Federal funds sold and securities purchased under resale agreements generally mature in one day.
Income Taxes	On December 22, 2017, Federal Tax Reform was enacted into law. The new legislation included a decrease in the corporate federal income tax rate from 35% to 21% effective January 1, 2018. Under ASC 740, the effects of the changes in tax rates and laws are recognized in the period in which the new legislation is enacted. Therefore, Synovus was required to remeasure its deferred tax assets and liabilities and record the adjustment to income tax expense effective December 22, 2017. In December 2017, the SEC issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118), which allowed companies to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. Since Federal Tax Reform was enacted late in 2017, management expects that certain deferred tax assets and liabilities will continue to be evaluated in the context of Federal Tax Reform through the date of the filing of our 2017 federal income tax return, and may change as a result of evolving management interpretations, elections, and assumptions, as well as new guidance that may be issued by the Internal Revenue Service. Accordingly, the federal income tax expense of $47.2 million recorded in 2017 relating to the effects from Federal Tax Reform is considered provisional. Management expects to complete its analysis within the measurement period in accordance with SAB 118.
Recently Adopted Accounting Standards Updates	ASU 2014-09, Revenue from Contracts with Customers (Topic 606) issued by the FASB in May 2014 , and all subsequent ASUs that modified 606. ASU 2014-09 implements a common revenue standard that establishes principles for reporting information about the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts to provide goods or services to customers. The core principle of the revenue model is that a company will recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The scope of the guidance explicitly excludes net interest income as well as many other revenues from financial assets. Management reviewed its revenue streams and contracts with customers and did not identify material changes to the timing or amount of revenue recognition. Synovus adopted these ASUs on the required effective date of January 1, 2018 utilizing the modified retrospective method of adoption. The adoption resulted in a cumulative effect adjustment of ($685) thousand to the opening balance of retained earnings. Beginning January 1, 2018, in connection with the adoption of this standard, Synovus began including merchant discounts and other card-related fees in card fees. For periods prior to January 1, 2018, these amounts were previously presented in other non-interest income and have been reclassified for comparability. See "Part I - Item 1. Financial Statements and Supplementary Data - Note 12 - Non-interest Income" for the required disclosures in accordance with this ASU. ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. In February 2018, the FASB issued final guidance on reclassification of tax effects stranded in other comprehensive income due to Federal Tax Reform. The guidance provides entities the option to reclassify the tax effects that are stranded in accumulated other comprehensive income, or AOCI, as a result of Federal Tax Reform to retained earnings. The guidance is effective for fiscal years beginning after December 15, 2018; early adoption is permitted. Synovus elected to early adopt ASU 2018-02 as of January 1, 2018 and elected to reclassify the income tax effects of Federal Tax Reform from AOCI to retained earnings. For Synovus, tax effects stranded in AOCI due to Federal Tax Reform totaled $7.6 million at December 31, 2017 and primarily related to unrealized losses on the available-for-sale investment securities portfolio. The reclassification adjustment resulted in an increase to retained earnings as of January 1, 2018 of $7.6 million and a corresponding decrease to AOCI for the same amount. ASU 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilitie s. In January 2016, the FASB issued ASU 2016-01 that included targeted amendments to accounting guidance for recognition, measurement, presentation, and disclosure of financial instruments. ASU 2016-01 requires equity investments (except those accounted for under the equity method of accounting or consolidated) to be measured at fair value with changes in fair value recognized in net income. This ASU requires a cumulative-effect adjustment to retained earnings as of the beginning of the reporting period of adoption to reclassify the cumulative change in fair value of equity securities previously recognized in AOCI. ASU 2016-01 became effective for Synovus on January 1, 2018. The adoption of the guidance resulted in a transfer of investments in mutual funds of $3.2 million , at fair value, from investment securities available for sale to other assets and a $117 thousand cumulative-effect adjustment that decreased retained earnings, with offsetting related adjustments to deferred taxes and AOCI. ASU 2016-01 also emphasizes the existing requirement to use an exit price concept to measure fair value for disclosure purposes in determining the fair value of loans. Determination of the fair value under the exit price method requires judgment because substantially all of the loans within the loan portfolio do not have observable market prices. The adoption of this guidance did not have a significant impact on Synovus' fair value disclosures.
Reclassifications	Prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current periods' presentation.
Revenue from Contracts with Customers	Following is a discussion of key revenues within the scope of the new revenue guidance: Service Charges on Deposit Accounts : Revenue from service charges on deposit accounts is earned through cash management, wire transfer, and other deposit-related services, as well as overdraft, non-sufficient funds, account management and other deposit-related fees. Revenue is recognized for these services either over time, corresponding with deposit accounts' monthly cycle, or at a point in time for transaction related services and fees. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers' accounts. Fiduciary and Asset Management Fees : Fiduciary and asset management fees are primarily comprised of fees earned from the management and administration of trusts and other customer assets. Synovus' performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month-end through a direct charge to customers' accounts. Synovus does not earn performance-based incentives. Card Fees: Card fees consist primarily of interchange fees from consumer credit and debit cards processed by card association networks, as well as merchant discounts, and other card related services. Interchange rates are generally set by the credit card associations and based on purchase volumes and other factors. Interchange fees and merchant discounts are recognized concurrently with the delivery of service on a daily basis as transactions occur. Payment is typically received immediately or in the following month. Card fees are reported net of certain associated expense items including loyalty program expenses and network expenses. Brokerage Revenue: Brokerage revenue consists primarily of commissions. Additionally, brokerage revenue includes advisory fees earned from the management of customer assets. Advisory fees for brokerage services are recognized and collected monthly and are based upon the month-end market value of the assets under management at a rate predetermined in the contract. Transactional revenues are based on the size and number of transactions executed at the client's direction and are generally recognized on the trade date with payment received on the settlement date. Insurance Revenue: Insurance revenue primarily consists of commissions received on annuity and life product sales. The commissions are recognized as revenue when the customer executes an insurance policy with the insurance carrier. In some cases, Synovus receives payment of trailing commissions each year when the customer pays its annual premium. For the six and three months ended June 30, 2018 , Synovus recognized an immaterial amount of insurance trailing commissions related to performance obligations satisfied in prior periods. Other Fees: Other fees primarily consist of revenues generated from safe deposit box rental fees and lockbox services. Fees are recognized over time, on a monthly basis, as Synovus' performance obligation for services is satisfied. Payment is received upfront for safe deposit box rentals and in the following month for lockbox services. Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity's obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. Synovus' non-interest revenue streams are largely based on transactional activity, or standard month-end revenue accruals such as asset management fees based on month-end market values. Consideration is often received immediately or shortly after Synovus satisfies its performance obligation and revenue is recognized. Synovus does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances. As of June 30, 2018 and December 31, 2017, Synovus did not have any significant contract balances.

Investment Securities Availab24

Investment Securities Available for Sale (Tables)	6 Months Ended
	Jun. 30, 2018
Investments [Abstract]
Summary of Available-for-Sale Investment Securities	The amortized cost, gross unrealized gains and losses, and estimated fair values of investment securities available for sale at June 30, 2018 and December 31, 2017 are summarized below. June 30, 2018 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 122,800 $ — $ (2,167 ) $ 120,633 U.S. Government agency securities 40,753 181 — 40,934 Mortgage-backed securities issued by U.S. Government agencies 111,406 107 (3,569 ) 107,944 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,614,668 59 (87,882 ) 2,526,845 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 1,159,859 139 (43,550 ) 1,116,448 State and municipal securities 115 — — 115 Corporate debt and other debt securities 17,000 186 (143 ) 17,043 Total investment securities available for sale $ 4,066,601 $ 672 $ (137,311 ) $ 3,929,962 December 31, 2017 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 83,608 $ — $ (934 ) $ 82,674 U.S. Government agency securities 10,771 91 — 10,862 Mortgage-backed securities issued by U.S. Government agencies 121,283 519 (1,362 ) 120,440 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,666,818 5,059 (31,354 ) 2,640,523 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 1,135,259 144 (23,404 ) 1,111,999 State and municipal securities 180 — — 180 Corporate debt and other securities 20,320 294 (223 ) 20,391 Total investment securities available for sale $ 4,038,239 $ 6,107 $ (57,277 ) $ 3,987,069
Schedule of Unrealized Loss on Investments	Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at June 30, 2018 and December 31, 2017 are presented below. June 30, 2018 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Treasury securities $ 72,386 $ 1,378 $ 29,255 $ 789 $ 101,641 $ 2,167 Mortgage-backed securities issued by U.S. Government agencies 23,240 632 67,765 2,937 91,005 3,569 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1,703,526 49,197 812,767 38,685 2,516,293 87,882 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 609,505 21,190 412,961 22,360 1,022,466 43,550 Corporate debt and other debt securities — — 1,857 143 1,857 143 Total $ 2,408,657 $ 72,397 $ 1,324,605 $ 64,914 $ 3,733,262 $ 137,311 December 31, 2017 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Treasury securities $ 34,243 $ 443 $ 29,562 $ 491 $ 63,805 $ 934 Mortgage-backed securities issued by U.S. Government agencies 36,810 357 55,740 1,005 92,550 1,362 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1,271,012 10,263 929,223 21,091 2,200,235 31,354 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 653,781 9,497 426,237 13,907 1,080,018 23,404 Corporate debt and other securities — — 5,097 223 5,097 223 Total $ 1,995,846 $ 20,560 $ 1,445,859 $ 36,717 $ 3,441,705 $ 57,277
Amortized Cost and Estimated Fair Value by Contractual Maturity of Investment Securities Available-for-Sale	For purposes of the maturity table, mortgage-backed securities and CMOs, which are not due at a single maturity date, have been classified based on the final contractual maturity date. Distribution of Maturities at June 30, 2018 (in thousands) Within One Year 1 to 5 Years 5 to 10 Years More Than 10 Years Total Amortized Cost U.S. Treasury securities $ 18,993 $ 103,807 $ — $ — $ 122,800 U.S. Government agency securities 2,330 6,437 31,986 — 40,753 Mortgage-backed securities issued by U.S. Government agencies — — 27,725 83,681 111,406 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1 1,471 615,334 1,997,862 2,614,668 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 17,355 1,142,504 1,159,859 State and municipal securities 115 — — — 115 Corporate debt and other debt securities — — 15,000 2,000 17,000 Total amortized cost $ 21,439 $ 111,715 $ 707,400 $ 3,226,047 $ 4,066,601 Fair Value U.S. Treasury securities $ 18,993 $ 101,640 $ — $ — $ 120,633 U.S. Government agency securities 2,337 6,455 32,142 — 40,934 Mortgage-backed securities issued by U.S. Government agencies — — 27,266 80,678 107,944 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1 1,520 596,366 1,928,958 2,526,845 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 16,855 1,099,593 1,116,448 State and municipal securities 115 — — — 115 Corporate debt and other debt securities — — 15,186 1,857 17,043 Total fair value $ 21,446 $ 109,615 $ 687,815 $ 3,111,086 $ 3,929,962
Schedule of Activity for Available-for-Sale Securities	Proceeds from sales, gross gains, and gross losses on sales of securities available for sale for the six and three months ended June 30, 2018 and 2017 are presented below. The specific identification method is used to reclassify gains and losses out of other comprehensive income at the time of sale. On January 1, 2018, Synovus transferred $3.2 million , at fair value, from investment securities available for sale to other assets upon adoption of ASU 2016-01. Six Months Ended June 30, Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Proceeds from sales of investment securities available for sale $ 35,066 $ 338,381 $ 35,066 $ 55,752 Gross realized gains on sales — 7,942 — 239 Gross realized losses on sales (1,296 ) (275 ) (1,296 ) (240 ) Investment securities (losses) gains, net $ (1,296 ) $ 7,667 $ (1,296 ) $ (1 )

Restructuring Charges (Tables)

Restructuring Charges (Tables)	6 Months Ended
	Jun. 30, 2018
Restructuring Charges [Abstract]
Schedule of Restructuring and Related Costs	The following tables present aggregate activity within the accrual for restructuring charges for the six and three months ended June 30, 2018 and 2017 : (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2017 $ 336 $ 3,276 $ 3,612 Accruals for lease terminations — (377 ) (377 ) Payments (336 ) (1,031 ) (1,367 ) Balance at June 30, 2018 $ — $ 1,868 $ 1,868 Balance at April 1, 2018 — 2,506 2,506 Payments — (638 ) (638 ) Balance at June 30, 2018 $ — $ 1,868 $ 1,868 (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2016 $ 81 $ 3,968 $ 4,049 Accrual for voluntary and involuntary termination benefits 6,453 — 6,453 Payments (2,803 ) (438 ) (3,241 ) Balance at June 30, 2017 $ 3,731 $ 3,530 $ 7,261 Balance at April 1, 2017 6,315 3,689 10,004 Payments (2,584 ) (159 ) (2,743 ) Balance at June 30, 2017 $ 3,731 $ 3,530 $ 7,261 For the six and three months ended June 30, 2018 and 2017 , total restructuring charges consist of the following components: Six Months Ended June 30, Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Severance charges $ — $ 6,453 $ — $ — Other charges, net (212 ) 71 103 13 Total restructuring charges, net $ (212 ) $ 6,524 $ 103 $ 13

Loans and Allowance for Loan 26

Loans and Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2018
Loans and Allowance for Loan Losses [Abstract]
Schedule of Current, Accruing Past Due, and Nonaccrual Loans	The following is a summary of current, accruing past due, and non-accrual loans by portfolio class as of June 30, 2018 and December 31, 2017 . Current, Accruing Past Due, and Non-accrual Loans June 30, 2018 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 7,170,877 $ 18,425 $ 547 $ 18,972 $ 81,231 $ 7,271,080 Owner-occupied 4,994,038 4,180 98 4,278 6,076 5,004,392 Total commercial and industrial 12,164,915 22,605 645 23,250 87,307 12,275,472 Investment properties 5,505,409 1,838 611 2,449 1,738 5,509,596 1-4 family properties 715,154 2,309 — 2,309 3,247 720,710 Land and development 407,639 1,602 — 1,602 4,624 413,865 Total commercial real estate 6,628,202 5,749 611 6,360 9,609 6,644,171 Home equity lines 1,430,778 8,450 362 8,812 14,265 1,453,855 Consumer mortgages 2,741,064 4,805 244 5,049 4,822 2,750,935 Credit cards 235,406 1,793 1,225 3,018 — 238,424 Other consumer loans 1,783,466 8,990 135 9,125 1,325 1,793,916 Total consumer 6,190,714 24,038 1,966 26,004 20,412 6,237,130 Total loans $ 24,983,831 $ 52,392 $ 3,222 $ 55,614 $ 117,328 $ 25,156,773 (1 ) December 31, 2017 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 7,097,127 $ 11,214 $ 1,016 $ 12,230 $ 70,130 $ 7,179,487 Owner-occupied 4,830,150 6,880 479 7,359 6,654 4,844,163 Total commercial and industrial 11,927,277 18,094 1,495 19,589 76,784 12,023,650 Investment properties 5,663,665 2,506 90 2,596 3,804 5,670,065 1-4 family properties 775,023 3,545 202 3,747 2,849 781,619 Land and development 476,131 1,609 67 1,676 5,797 483,604 Total commercial real estate 6,914,819 7,660 359 8,019 12,450 6,935,288 Home equity lines 1,490,808 5,629 335 5,964 17,455 1,514,227 Consumer mortgages 2,622,061 3,971 268 4,239 7,203 2,633,503 Credit cards 229,015 1,930 1,731 3,661 — 232,676 Other consumer loans 1,461,223 10,333 226 10,559 1,669 1,473,451 Total consumer 5,803,107 21,863 2,560 24,423 26,327 5,853,857 Total loans $ 24,645,203 $ 47,617 $ 4,414 $ 52,031 $ 115,561 $ 24,812,795 (2 ) (1) Total before net deferred fees and costs of $22.7 million . (2) Total before net deferred fees and costs of $25.3 million .
Loan Portfolio Credit Exposure	In the following tables, consumer loans are generally assigned a risk grade similar to the classifications described above; however, upon reaching 90 days and 120 days past due, they are generally downgraded to Substandard and Loss, respectively, in accordance with the FFIEC Uniform Retail Credit Classification and Account Management Policy. Additionally, in accordance with the Interagency Supervisory Guidance on Allowance for Loan and Lease Losses Estimation Practices for Loans and Lines of Credit Secured by Junior Liens on 1-4 Family Residential Properties, the risk grade classifications of home equity lines and consumer mortgages secured by junior liens on 1-4 family residential properties also consider available information on the payment status of any associated senior liens with other financial institutions. Loan Portfolio Credit Exposure by Risk Grade June 30, 2018 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Commercial, financial and agricultural $ 6,996,081 $ 107,251 $ 164,581 $ 3,167 $ — $ 7,271,080 Owner-occupied 4,873,936 63,373 67,010 73 — 5,004,392 Total commercial and industrial 11,870,017 170,624 231,591 3,240 — 12,275,472 Investment properties 5,422,727 51,279 35,590 — — 5,509,596 1-4 family properties 698,532 9,245 12,933 — — 720,710 Land and development 369,071 29,612 12,053 3,129 — 413,865 Total commercial real estate 6,490,330 90,136 60,576 3,129 — 6,644,171 Home equity lines 1,435,724 — 16,599 175 1,357 (3) 1,453,855 Consumer mortgages 2,743,245 — 7,588 102 — (3) 2,750,935 Credit cards 237,198 — 447 — 779 (4) 238,424 Other consumer loans 1,792,568 — 1,087 257 4 (3) 1,793,916 Total consumer 6,208,735 — 25,721 534 2,140 6,237,130 Total loans $ 24,569,082 $ 260,760 $ 317,888 $ 6,903 $ 2,140 $ 25,156,773 (5 ) December 31, 2017 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Commercial, financial and agricultural $6,929,506 $115,912 $132,818 $1,251 $ — $7,179,487 Owner-occupied 4,713,877 50,140 80,073 73 — 4,844,163 Total commercial and industrial 11,643,383 166,052 212,891 1,324 — 12,023,650 Investment properties 5,586,792 64,628 18,645 — — 5,670,065 1-4 family properties 745,299 19,419 16,901 — — 781,619 Land and development 431,759 33,766 14,950 3,129 — 483,604 Total commercial real estate 6,763,850 117,813 50,496 3,129 — 6,935,288 Home equity lines 1,491,105 — 21,079 285 1,758 (3) 1,514,227 Consumer mortgages 2,622,499 — 10,607 291 106 (3) 2,633,503 Credit cards 230,945 — 399 — 1,332 (4) 232,676 Other consumer loans 1,470,944 — 2,168 329 10 (3) 1,473,451 Total consumer 5,815,493 — 34,253 905 3,206 5,853,857 Total loans $ 24,222,726 $ 283,865 $ 297,640 $ 5,358 $ 3,206 $ 24,812,795 (6 ) (1) Includes $209.6 million and $190.6 million of Substandard accruing loans at June 30, 2018 and December 31, 2017 , respectively. (2) The loans within this risk grade are on non-accrual status. Commercial loans generally have an allowance for loan losses in accordance with ASC 310, and retail loans generally have an allowance for loan losses equal to 50% of the loan amount. (3) The loans within this risk grade are on non-accrual status and have an allowance for loan losses equal to the full loan amount. (4) Represent amounts that were 120 days past due. These credits are downgraded to the Loss category with an allowance for loan losses equal to the full loan amount and are generally charged off upon reaching 181 days past due in accordance with the FFIEC Uniform Retail Credit Classification and Account Management Policy. (5) Total before net deferred fees and costs of $22.7 million . (6) Total before net deferred fees and costs of $25.3 million .
Schedule of Allowances for Loan Losses and Recorded Investment in Loans	The following table details the changes in the allowance for loan losses by loan segment for the six and three months ended June 30, 2018 and 2017 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Six Months Ended June 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 126,803 $ 74,998 $ 47,467 $ 249,268 Charge-offs (23,786 ) (2,446 ) (9,894 ) (36,126 ) Recoveries 3,995 6,964 3,058 14,017 Provision for loan losses 23,323 (4,311 ) 5,554 24,566 Ending balance (1) $ 130,335 $ 75,205 $ 46,185 $ 251,725 Ending balance: individually evaluated for impairment $ 9,474 $ 4,687 $ 771 $ 14,932 Ending balance: collectively evaluated for impairment $ 120,861 $ 70,518 $ 45,414 $ 236,793 Loans: Ending balance: total loans (1)(2) $ 12,275,472 $ 6,644,171 $ 6,237,130 $ 25,156,773 Ending balance: individually evaluated for impairment $ 107,544 $ 53,805 $ 27,676 $ 189,025 Ending balance: collectively evaluated for impairment $ 12,167,928 $ 6,590,366 $ 6,209,454 $ 24,967,748 As Of and For The Six Months Ended June 30, 2017 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 125,778 $ 81,816 $ 44,164 $ 251,758 Charge-offs (19,535 ) (3,207 ) (9,656 ) (32,398 ) Recoveries 3,282 3,648 2,871 9,801 Provision for loan losses 13,912 (4,730 ) 9,752 18,934 Ending balance (1) $ 123,437 $ 77,527 $ 47,131 $ 248,095 Ending balance: individually evaluated for impairment $ 7,226 $ 4,386 $ 1,038 $ 12,650 Ending balance: collectively evaluated for impairment $ 116,211 $ 73,141 $ 46,093 $ 235,445 Loans: Ending balance: total loans (1)(3) $ 11,742,945 $ 7,422,234 $ 5,291,371 $ 24,456,550 Ending balance: individually evaluated for impairment $ 122,889 $ 73,638 $ 31,688 $ 228,215 Ending balance: collectively evaluated for impairment $ 11,620,056 $ 7,348,596 $ 5,259,683 $ 24,228,335 (1 ) As of and for the six months ended June 30, 2018 and 2017, there were no purchased credit-impaired loans and no allowance for loan losses for purchased credit-impaired loans. (2) Total before net deferred fees and costs of $22.7 million . (3) Total before net deferred fees and costs of $26.0 million . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Three Months Ended June 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 134,745 $ 73,991 $ 49,028 $ 257,764 Charge-offs (15,770 ) (523 ) (5,211 ) (21,504 ) Recoveries 1,635 480 1,560 3,675 Provision for loan losses 9,725 1,257 808 11,790 Ending balance (1) $ 130,335 $ 75,205 $ 46,185 $ 251,725 Ending balance: individually evaluated for impairment $ 9,474 $ 4,687 $ 771 $ 14,932 Ending balance: collectively evaluated for impairment $ 120,861 $ 70,518 $ 45,414 $ 236,793 Loans: Ending balance: total loans (1)(2) $ 12,275,472 $ 6,644,171 $ 6,237,130 $ 25,156,773 Ending balance: individually evaluated for impairment $ 107,544 $ 53,805 $ 27,676 $ 189,025 Ending balance: collectively evaluated for impairment $ 12,167,928 $ 6,590,366 $ 6,209,454 $ 24,967,748 As Of and For The Three Months Ended June 30, 2017 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 127,096 $ 78,314 $ 48,104 $ 253,514 Charge-offs (12,642 ) (1,299 ) (5,722 ) (19,663 ) Recoveries 1,458 759 1,767 3,984 Provision for loan losses 7,525 (247 ) 2,982 10,260 Ending balance (1) $ 123,437 $ 77,527 $ 47,131 $ 248,095 Ending balance: individually evaluated for impairment $ 7,226 $ 4,386 $ 1,038 $ 12,650 Ending balance: collectively evaluated for impairment $ 116,211 $ 73,141 $ 46,093 $ 235,445 Loans: Ending balance: total loans (1)(3) $ 11,742,945 $ 7,422,234 $ 5,291,371 $ 24,456,550 Ending balance: individually evaluated for impairment $ 122,889 $ 73,638 $ 31,688 $ 228,215 Ending balance: collectively evaluated for impairment $ 11,620,056 $ 7,348,596 $ 5,259,683 $ 24,228,335 (1 ) As of and for the three months ended June 30, 2018 and 2017 , there were no purchased credit-impaired loans and no allowance for loan losses for purchased credit-impaired loans. (2) Total before net deferred fees and costs of $22.7 million . (3) Total before net deferred fees and costs of $26.0 million .
Schedule of Impaired Loans	The tables below summarize impaired loans (including accruing TDRs) as of June 30, 2018 and December 31, 2017 . Impaired Loans (including accruing TDRs) June 30, 2018 Six Months Ended June 30, 2018 Three Months Ended June 30, 2018 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial, financial and agricultural $ 21,549 $ 32,458 $ — $ 11,129 $ — $ 13,575 $ — Owner-occupied — — — — — — — Total commercial and industrial 21,549 32,458 — 11,129 — 13,575 — Investment properties — — — — — — — 1-4 family properties — — — — — — — Land and development — — — 19 — — — Total commercial real estate — — — 19 — — — Home equity lines — — — 1,423 — 724 — Consumer mortgages 62 87 — 1,330 — 1,780 — Credit cards — — — — — — — Other consumer loans — — — — — — — Total consumer 62 87 — 2,753 — 2,504 — Total impaired loans with no related allowance recorded $ 21,611 $ 32,545 $ — $ 13,901 $ — $ 16,079 $ — With allowance recorded Commercial, financial and agricultural $ 45,171 $ 45,385 $ 6,813 $ 62,564 $ 428 $ 57,930 $ 155 Owner-occupied 40,824 40,884 2,660 38,073 730 38,432 373 Total commercial and industrial 85,995 86,269 9,473 100,637 1,158 96,362 528 Investment properties 24,218 24,218 1,659 23,604 418 24,439 220 1-4 family properties 10,458 10,458 309 11,466 442 11,217 226 Land and development 19,129 20,869 2,720 18,280 150 18,428 74 Total commercial real estate 53,805 55,545 4,688 53,350 1,010 54,084 520 Home equity lines 3,915 3,915 174 3,822 76 3,262 30 Consumer mortgages 18,767 18,767 350 19,283 394 19,459 199 Credit cards — — — — — 4,985 — Other consumer loans 4,932 4,938 248 5,188 143 — 72 Total consumer 27,614 27,620 772 28,293 613 27,706 301 Total impaired loans with allowance recorded $ 167,414 $ 169,434 $ 14,933 $ 182,280 $ 2,781 $ 178,152 $ 1,349 Total impaired loans Commercial, financial and agricultural $ 66,720 $ 77,843 $ 6,813 $ 73,693 $ 428 $ 71,505 $ 155 Owner-occupied 40,824 40,884 2,660 38,073 730 38,432 373 Total commercial and industrial 107,544 118,727 9,473 111,766 1,158 109,937 528 Investment properties 24,218 24,218 1,659 23,604 418 24,439 220 1-4 family properties 10,458 10,458 309 11,466 442 11,217 226 Land and development 19,129 20,869 2,720 18,299 150 18,428 74 Total commercial real estate 53,805 55,545 4,688 53,369 1,010 54,084 520 Home equity lines 3,915 3,915 174 5,245 76 3,986 30 Consumer mortgages 18,829 18,854 350 20,613 394 21,239 199 Credit cards — — — — — 4,985 — Other consumer loans 4,932 4,938 248 5,188 143 — 72 Total consumer 27,676 27,707 772 31,046 613 30,210 301 Total impaired loans $ 189,025 $ 201,979 $ 14,933 $ 196,181 $ 2,781 $ 194,231 $ 1,349 Impaired Loans (including accruing TDRs) December 31, 2017 Year Ended December 31, 2017 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded Commercial, financial and agricultural $ 8,220 $ 9,576 $ — $ 21,686 $ — Owner-occupied — — — 6,665 — Total commercial and industrial 8,220 9,576 — 28,351 — Investment properties — — — 123 — 1-4 family properties — — — 323 — Land and development 56 1,740 — 1,816 — Total commercial real estate 56 1,740 — 2,262 — Home equity lines 2,746 2,943 — 1,205 — Consumer mortgages — — — 496 — Credit cards — — — — — Other consumer loans — — — — — Total consumer 2,746 2,943 — 1,701 — Total impaired loans with no related allowance recorded $ 11,022 $ 14,259 $ — $ 32,314 $ — With allowance recorded Commercial, financial and agricultural $ 65,715 $ 65,851 $ 7,406 $ 50,468 $ 1,610 Owner-occupied 37,399 37,441 2,109 40,498 1,382 Total commercial and industrial 103,114 103,292 9,515 90,966 2,992 Investment properties 23,364 23,364 1,100 28,749 1,144 1-4 family properties 15,056 15,056 504 16,257 925 Land and development 18,420 18,476 2,636 23,338 404 Total commercial real estate 56,840 56,896 4,240 68,344 2,473 Home equity lines 5,096 5,096 114 7,476 334 Consumer mortgages 18,668 18,668 569 19,144 896 Credit cards — — — — — Other consumer loans 5,546 5,546 470 4,765 266 Total consumer 29,310 29,310 1,153 31,385 1,496 Total impaired loans with allowance recorded $ 189,264 $ 189,498 $ 14,908 $ 190,695 $ 6,961 Total impaired loans Commercial, financial and agricultural $ 73,935 $ 75,427 $ 7,406 $ 72,154 $ 1,610 Owner-occupied 37,399 37,441 2,109 47,163 1,382 Total commercial and industrial 111,334 112,868 9,515 119,317 2,992 Investment properties 23,364 23,364 1,100 28,872 1,144 1-4 family properties 15,056 15,056 504 16,580 925 Land and development 18,476 20,216 2,636 25,154 404 Total commercial real estate 56,896 58,636 4,240 70,606 2,473 Home equity lines 7,842 8,039 114 8,681 334 Consumer mortgages 18,668 18,668 569 19,640 896 Credit cards — — — — — Other consumer loans 5,546 5,546 470 4,765 266 Total consumer 32,056 32,253 1,153 33,086 1,496 Total impaired loans $ 200,286 $ 203,757 $ 14,908 $ 223,009 $ 6,961
Troubled Debt Restructurings	The following tables represent, by concession type, the post-modification balance for loans modified or renewed during the six and three months ended June 30, 2018 and 2017 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Six Months Ended June 30, 2018 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 14 $ — $ — $ 1,565 $ 1,565 Owner-occupied 6 — 4,799 684 5,483 Total commercial and industrial 20 — 4,799 2,249 7,048 Investment properties 3 — 6,011 2,215 8,226 1-4 family properties 7 — 965 492 1,457 Land and development 3 — — 1,786 1,786 Total commercial real estate 13 — 6,976 4,493 11,469 Home equity lines 3 — 172 148 320 Consumer mortgages 14 — 4,695 87 4,782 Credit cards — — — — — Other consumer loans 31 — 925 821 1,746 Total consumer 48 — 5,792 1,056 6,848 Total TDRs 81 $ — $ 17,567 $ 7,798 $ 25,365 (1 ) Three Months Ended June 30, 2018 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 5 $ — $ — $ 576 $ 576 Owner-occupied 4 — 2,094 592 2,686 Total commercial and industrial 9 — 2,094 1,168 3,262 Investment properties 2 — 6,011 256 6,267 1-4 family properties 1 — — 492 492 Land and development 3 — — 1,786 1,786 Total commercial real estate 6 — 6,011 2,534 8,545 Home equity lines 3 — 172 148 320 Consumer mortgages 7 — 2,963 87 3,050 Credit cards — — — — — Other consumer loans 17 — 388 313 701 Total consumer 27 — 3,523 548 4,071 Total TDRs 42 $ — $ 11,628 $ 4,250 $ 15,878 (1 ) (1) No net charge-offs were recorded during the six and three months ended June 30, 2018 upon restructuring of these loans. TDRs by Concession Type Six Months Ended June 30, 2017 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 28 $ — $ 5,760 $ 6,279 $ 12,039 Owner-occupied 1 — — 22 22 Total commercial and industrial 29 — 5,760 6,301 12,061 Investment properties — — — — — 1-4 family properties 16 — 2,089 513 2,602 Land and development 1 — — 135 135 Total commercial real estate 17 — 2,089 648 2,737 Home equity lines — — — — — Consumer mortgages 1 — — 9 9 Credit cards — — — — — Other consumer loans 8 — — 570 570 Total consumer 9 — — 579 579 Total TDRs 55 $ — $ 7,849 $ 7,528 $ 15,377 (2 ) Three Months Ended June 30, 2017 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Commercial, financial and agricultural 10 $ — $ 1,895 $ 740 $ 2,635 Owner-occupied 1 — — 22 22 Total commercial and industrial 11 — 1,895 762 2,657 Investment properties — — — — — 1-4 family properties 8 — 478 196 674 Land and development 1 — — 135 135 Total commercial real estate 9 — 478 331 809 Home equity lines — — — — — Consumer mortgages 1 — — 9 9 Credit cards — — — — — Other consumer loans 5 — — 295 295 Total consumer 6 — — 304 304 Total TDRs 26 $ — $ 2,373 $ 1,397 $ 3,770 (2 ) (2) No net charge-offs were recorded during the six and three months ended June 30, 2017 upon restructuring of these loans.

Other Comprehensive Income (L27

Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)	The following tables illustrate activity within the balances in accumulated other comprehensive income (loss) by component for the six and three months ended June 30, 2018 and 2017 . Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) (in thousands) Net unrealized gains (losses) on cash flow hedges Net unrealized gains (losses) on investment securities available for sale Post-retirement unfunded health benefit Total Balance at December 31, 2017 $ (12,137 ) $ (43,470 ) $ 853 $ (54,754 ) Other comprehensive income (loss) before reclassifications — (64,409 ) — (64,409 ) Amounts reclassified from accumulated other comprehensive income (loss) — 960 (46 ) 914 Net current period other comprehensive loss — (63,449 ) (46 ) (63,495 ) Reclassification from adoption of ASU 2018-02 — (7,763 ) 175 (7,588 ) Cumulative-effect adjustment from adoption of ASU 2016-01 — 117 — 117 Balance as of June 30, 2018 $ (12,137 ) $ (114,565 ) $ 982 $ (125,720 ) Balance as of April 1, 2018 $ (12,137 ) $ (96,647 ) $ 1,007 $ (107,777 ) Other comprehensive income (loss) before reclassifications — (18,878 ) — (18,878 ) Amounts reclassified from accumulated other comprehensive income (loss) — 960 (25 ) 935 Net current period other comprehensive income — (17,918 ) (25 ) (17,943 ) Balance as of June 30, 2018 $ (12,137 ) $ (114,565 ) $ 982 $ (125,720 ) (in thousands) Net unrealized gains (losses) on cash flow hedges Net unrealized gains (losses) on investment securities available for sale Post-retirement unfunded health benefit Total Balance at December 31, 2016 $ (12,217 ) $ (44,324 ) $ 882 $ (55,659 ) Other comprehensive income before reclassifications — 12,453 — 12,453 Amounts reclassified from accumulated other comprehensive income (loss) 80 (4,715 ) (24 ) (4,659 ) Net current period other comprehensive income 80 7,738 (24 ) 7,794 Balance as of June 30, 2017 $ (12,137 ) $ (36,586 ) $ 858 $ (47,865 ) Balance as of April 1, 2017 $ (12,177 ) $ (43,444 ) $ 870 $ (54,751 ) Other comprehensive income before reclassifications — 6,857 — 6,857 Amounts reclassified from accumulated other comprehensive income (loss) 40 1 (12 ) 29 Net current period other comprehensive income (loss) 40 6,858 (12 ) 6,886 Balance as of June 30, 2017 $ (12,137 ) $ (36,586 ) $ 858 (47,865 )
Schedule of Reclassifications out of Accumulated Other Comprehensive Income (Loss)	Reclassifications out of Accumulated Other Comprehensive Income (Loss) Details About Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in the Statement Where Net Income is Presented For the Six Months Ended June 30, 2018 2017 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ — $ (130 ) Interest expense — 50 Income tax (expense) benefit $ — $ (80 ) Reclassifications, net of income taxes Net unrealized gains on investment securities available for sale: Realized (losses) gains on sale of securities $ (1,296 ) $ 7,667 Investment securities gains, net 336 (2,952 ) Income tax (expense) benefit $ (960 ) $ 4,715 Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 68 $ 40 Salaries and other personnel expense (22 ) (16 ) Income tax (expense) benefit $ 46 $ 24 Reclassifications, net of income taxes Details About Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Affected Line Item in the Statement Where Net Income is Presented For the Three Months Ended June 30, 2018 2017 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ — $ (65 ) Interest expense — 25 Income tax (expense) benefit $ — $ (40 ) Reclassifications, net of income taxes Net unrealized gains on investment securities available for sale: Realized losses on sale of securities $ (1,296 ) $ (1 ) Investment securities gains, net 336 — Income tax (expense) benefit $ (960 ) $ (1 ) Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 34 $ 20 Salaries and other personnel expense (9 ) (8 ) Income tax (expense) benefit $ 25 $ 12 Reclassifications, net of income taxes

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Financial Instruments Measured at Fair Value on Recurring Basis	The following table presents all financial instruments measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017 , according to the valuation hierarchy included in ASC 820-10. For debt securities, class was determined based on the nature and risks of the investments. Synovus did not have any transfers between levels during the six and three months ended June 30, 2018 and year ended December 31, 2017 . June 30, 2018 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities $ — $ 17,164 $ — $ 17,164 Mortgage-backed securities issued by U.S. Government agencies — 577 — 577 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 409 — 409 State and municipal securities — 2,495 — 2,495 Other investments 906 — — 906 Total trading securities $ 906 $ 20,645 $ — $ 21,551 Mortgage loans held for sale — 53,673 — 53,673 Investment securities available for sale: U.S. Treasury securities 120,633 — — 120,633 U.S. Government agency securities — 40,934 — 40,934 Mortgage-backed securities issued by U.S. Government agencies — 107,944 — 107,944 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,526,845 — 2,526,845 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 1,116,448 — 1,116,448 State and municipal securities — 115 — 115 Corporate debt and other debt securities (1) — 15,186 1,857 17,043 Total investment securities available for sale $ 120,633 $ 3,807,472 $ 1,857 $ 3,929,962 Private equity investments — — 12,678 12,678 Mutual funds 3,124 — — 3,124 Mutual funds held in rabbi trusts 13,638 — — 13,638 GGL/SBA loans servicing asset — — 4,186 4,186 Derivative assets: Interest rate contracts — 10,034 — 10,034 Mortgage derivatives (2) — 1,302 — 1,302 Total derivative assets $ — $ 11,336 $ — $ 11,336 Liabilities Trading account liabilities — 12,328 — 12,328 Earnout liability (3) — — 11,348 11,348 Derivative liabilities: Interest rate contracts — 19,303 — 19,303 Mortgage derivatives (2) — 248 — 248 Visa derivative — — 5,943 5,943 Total derivative liabilities $ — $ 19,551 $ 5,943 $ 25,494 December 31, 2017 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: Mortgage-backed securities issued by U.S. Government agencies $ — $ 3,002 $ — $ 3,002 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 296 — 296 Other investments 522 — — 522 Total trading securities $ 522 $ 3,298 $ — $ 3,820 Mortgage loans held for sale — 48,024 — 48,024 Investment securities available for sale: U.S. Treasury securities 82,674 — — 82,674 U.S. Government agency securities — 10,862 — 10,862 Mortgage-backed securities issued by U.S. Government agencies — 120,440 — 120,440 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,640,523 — 2,640,523 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 1,111,999 — 1,111,999 State and municipal securities — 180 — 180 Corporate debt and other securities (1) 3,162 15,294 1,935 20,391 Total investment securities available for sale $ 85,836 $ 3,899,298 $ 1,935 $ 3,987,069 Private equity investments — — 15,771 15,771 Mutual funds held in rabbi trusts 14,140 — — 14,140 GGL/SBA loan servicing asset — — 4,101 4,101 Derivative assets: Interest rate contracts — 10,786 — 10,786 Mortgage derivatives (2) — 936 — 936 Total derivative assets $ — $ 11,722 $ — $ 11,722 Liabilities Trading account liabilities — 1,000 — 1,000 Earnout liability (3) — — 11,348 11,348 Derivative liabilities: Interest rate contracts — 12,638 — 12,638 Mortgage derivatives (2) — 129 — 129 Visa derivative — — 4,330 4,330 Total derivative liabilities $ — $ 12,767 $ 4,330 $ 17,097 (1) Based on an analysis of the nature and risks of these investments, Synovus has determined that presenting these investments as a single asset class is appropriate. (2) Mortgage derivatives consist of customer interest rate lock commitments that relate to the potential origination of mortgage loans, which would be classified as held for sale and forward loan sales commitments with third-party investors. (3) Earnout liability consists of contingent consideration obligation related to the Global One acquisition.
Changes in Fair Value Included in Consolidated Statements of Income	The following table summarizes the difference between the fair value and the unpaid principal balance of mortgage loans held for sale measured at fair value and the changes in fair value of these loans. Mortgage loans held for sale are initially measured at fair value with subsequent changes in fair value recognized in earnings. Changes in fair value are recorded as a component of mortgage banking income in the consolidated statements of income. An immaterial portion of these changes in fair value was attributable to changes in instrument-specific credit risk. Changes in Fair Value Included in Net Income For the Six Months Ended June 30, For the Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Mortgage loans held for sale $ 155 $ 954 $ 40 $ (249 ) Mortgage Loans Held for Sale (in thousands) As of June 30, 2018 As of December 31, 2017 Fair value $ 53,673 $ 48,024 Unpaid principal balance 52,333 46,839 Fair value less aggregate unpaid principal balance $ 1,340 $ 1,185
Changes in Level 3 Fair Value Measurements	The table below includes a roll-forward of the amounts on the consolidated balance sheet for the six and three months ended June 30, 2018 and 2017 (including the change in fair value) for financial instruments of a material nature that are classified by Synovus within Level 3 of the fair value hierarchy and are measured at fair value on a recurring basis. Transfers between fair value levels are recognized at the end of the reporting period in which the associated changes in inputs occur. During the six and three months ended June 30, 2018 and 2017 , Synovus did not have any transfers between levels in the fair value hierarchy. For the six and three months ended June 30, 2018 , total net losses included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2018 was $6.2 million and $2.7 million, respectively. For the six and three months ended June 30, 2017 , total net losses included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2017 was $2.4 million and $2.1 million , respectively. Six Months Ended June 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset (2) Beginning balance, January 1, 2018 $ 1,935 $ 15,771 $ (4,330 ) $ (11,348 ) $ 4,101 Total (losses) gains realized/unrealized: Included in earnings — (3,093 ) (2,328 ) — (734 ) Unrealized losses included in other comprehensive income (78 ) — — — — Additions — — — — 819 Settlements — — 715 — — Ending balance, June 30, 2018 $ 1,857 $ 12,678 $ (5,943 ) $ (11,348 ) $ 4,186 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2018 $ — $ (3,093 ) $ (2,328 ) $ — $ (734 ) Three Months Ended June 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset Beginning balance, April 1, 2018 $ 1,852 $ 12,715 $ (3,974 ) $ (11,348 ) $ 3,971 Total (losses) gains realized/unrealized: Included in earnings — (37 ) (2,328 ) — (312 ) Unrealized gains included in other comprehensive income 5 — — — — Additions — — — — 527 Settlements — — 359 — — Ending balance, June 30, 2018 $ 1,857 $ 12,678 $ (5,943 ) $ (11,348 ) $ 4,186 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2018 $ — $ (37 ) $ (2,328 ) $ — $ (312 ) Six Months Ended June 30, 2017 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset (2) Beginning balance, January 1, 2017 $ 1,796 $ 25,493 $ (5,768 ) $ (14,000 ) $ — Total (losses) gains realized/unrealized: Included in earnings — (3,166 ) — (1,707 ) (694 ) Unrealized gains (losses) included in other comprehensive income 131 — — — Additions — — — — 539 Sales and settlements — (6,629 ) 715 — — Transfer from amortization method to fair value — — — — 4,452 Measurement period adjustments related to Global One acquisition — — — 1,766 — Ending balance, June 30, 2017 $ 1,927 $ 15,698 $ (5,053 ) $ (13,941 ) $ 4,297 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2017 $ — $ — $ — $ (1,707 ) $ (694 ) Three Months Ended June 30, 2017 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Earnout Liability (1) GGL / SBA Loans Servicing Asset (2) Beginning balance, April 1, 2017 $ 1,851 $ 23,679 $ (5,412 ) $ (11,421 ) $ 4,178 Total (losses) gains realized/unrealized: Included in earnings — (1,352 ) — (1,707 ) (376 ) Unrealized gains included in other comprehensive income 76 — — — — Additions — — — — 495 Sales and settlements — (6,629 ) 359 — — Measurement period adjustments related to Global One acquisition — — — (813 ) — Ending balance, June 30, 2017 $ 1,927 $ 15,698 $ (5,053 ) $ (13,941 ) $ 4,297 Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at June 30, 2017 $ — $ — $ — $ (1,707 ) $ (376 ) (1) Earnout liability consists of contingent consideration obligation related to the Global One acquisition. (2) Effective January 1, 2017, Synovus elected the fair value option for determining the value of the GGL/SBA loans servicing asset. Prior to 2017, Synovus accounted for the GGL/SBA loans servicing asset using the amortization method.
Fair Value Inputs, Assets, Quantitative Information	The table below provides an overview of the valuation techniques and significant unobservable inputs used in those techniques to measure financial instruments that are classified within Level 3 of the valuation hierarchy and are measured at fair value on a non-recurring basis. The range of sensitivities that management utilized in its fair value calculations is deemed acceptable in the industry with respect to the identified financial instruments. June 30, 2018 December 31, 2017 Valuation Technique Significant Unobservable Input Range (Weighted Average) (1) Range (Weighted Average) (1) Assets measured at fair value on a non-recurring basis Collateral dependent impaired loans Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs 0% - 68% (38%) 0% - 10% (7%) 0%-50% (15%) 0%-10% (7%) Other loans held for sale Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs N/A N/A 5% - 99% (54%) 0% - 10% (2%) Other real estate Third-party appraised value of real estate less estimated selling costs Discount to appraised value (2) Estimated selling costs N/A N/A 0%-85% (35%) 0%-10% (7%) Other assets held for sale Third-party appraised value less estimated selling costs or BOV Discount to appraised value (2) Estimated selling costs 27%-43% (42%) 0%-10% (7%) 21%-52% (25%) 0%-10% (7%) (1) The range represents management's estimate of the high and low of the value that would be assigned to a particular input. For assets measured at fair value on a non-recurring basis, the weighted average is the measure of central tendencies; it is not the value that management is using for the asset or liability. (2) Synovus also makes adjustments to the values of the assets listed above for reasons including age of the appraisal, information known by management about the property, such as occupancy rates, changes to the physical condition of the property, and other factors. The table below provides an overview of the valuation techniques and significant unobservable inputs used in those techniques to measure financial instruments that are classified within Level 3 of the valuation hierarchy and are measured at fair value on a recurring basis. June 30, 2018 December 31, 2017 Valuation Technique Significant Unobservable Input Level 3 Fair Value Range or Weighted Average Level 3 Fair Value Range or Weighted Average Assets and liabilities measured at fair value on a recurring basis Investment Securities Available for Sale - Other Investments: Trust preferred securities Discounted cash flow analysis Credit spread embedded in discount rate $1,857 438 bps $1,935 398 bps Private equity investments Individual analysis of each investee company Multiple factors, including but not limited to, current operations, financial condition, cash flows, evaluation of business management and financial plans, and recently executed financing transactions related to the investee companies 12,678 N/A 15,771 N/A GGL/SBA loans servicing asset Discounted cash flow analysis Discount rate Prepayment speeds 4,186 13.40% 8.64% 4,101 13.16% 7.50% Earnout liability Option pricing methods and Monte Carlo simulation Financial projections of Global One 11,348 N/A 11,348 N/A Visa derivative liability Discounted cash flow analysis Estimated timing of resolution of covered litigation, future cumulative deposits to the litigation escrow for settlement of the covered litigation, and estimated future monthly fees payable to the derivative counterparty 5,943 1-3 years 4,330 1-4 years
Assets and Liabilities Measured at Fair Value on Non-Recurring Basis	The following table presents assets measured at fair value on a non-recurring basis as of the dates indicated for which there was a fair value adjustment during the six months ended June 30, 2018 and year ended December 31, 2017. June 30, 2018 December 31, 2017 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans * $ — $ — $ 12,820 $ 12,820 $ — $ — $ 3,603 $ 3,603 Other loans held for sale — — — — — — 10,197 10,197 Other real estate — — — — — — 3,363 3,363 Other assets held for sale — — 695 695 — — 5,334 5,334 * Collateral-dependent impaired loans that were written down to fair value during the period.
Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents fair value adjustments recognized in earnings for the six and three months ended June 30, 2018 and 2017 for assets measured at fair value on a non-recurring basis still held at period-end. Six Months Ended June 30, Three Months Ended June 30, (in thousands) 2018 2017 2018 2017 Impaired loans * $ 7,548 $ 5,808 $ 6,828 $ 5,776 Other loans held for sale — 3,519 — — Other real estate — 518 — 280 Other assets held for sale 499 238 499 — * Collateral-dependent impaired loans that were written down to fair value during the period.
Carrying and Estimated Fair Values of Financial Instruments Carried on Balance Sheet	The carrying and estimated fair values of financial instruments, as well as the level within the fair value hierarchy, as of June 30, 2018 and December 31, 2017 are as follows: June 30, 2018 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 1,091,788 $ 1,091,788 $ 1,091,788 $ — $ — Trading account assets 21,551 21,551 906 20,645 — Mortgage loans held for sale 53,673 53,673 — 53,673 — Other loans held for sale 2,733 2,733 — — 2,733 Investment securities available for sale 3,929,962 3,929,962 120,633 3,807,472 1,857 Private equity investments 12,678 12,678 — — 12,678 Mutual funds 3,124 3,124 3,124 — — Mutual funds held in rabbi trusts 13,638 13,638 13,638 — — Loans, net 24,882,331 24,732,689 — — 24,732,689 GGL/SBA loans servicing asset 4,186 4,186 — — 4,186 Derivative assets 11,336 11,336 — 11,336 — Financial liabilities Trading account liabilities 12,328 12,328 — 12,328 — Non-interest bearing deposits 7,630,491 7,630,491 — 7,630,491 — Non-time interest bearing deposits 13,958,048 13,958,048 — 13,958,048 — Time deposits 4,854,149 4,826,356 — 4,826,356 — Total deposits $ 26,442,688 $ 26,414,895 $ — $ 26,414,895 $ — Federal funds purchased, other short-term borrowings and other short-term liabilities 207,580 207,580 207,580 — — Long-term debt 1,656,647 1,658,790 — 1,658,790 — Earnout liabilities 11,348 11,348 — — 11,348 Derivative liabilities 25,494 25,494 — 19,551 5,943 December 31, 2017 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 932,933 $ 932,933 $ 932,933 $ — $ — Trading account assets 3,820 3,820 522 3,298 — Mortgage loans held for sale 48,024 48,024 — 48,024 — Other loans for sale 11,356 11,356 — — 11,356 Investment securities available for sale 3,987,069 3,987,069 85,836 3,899,298 1,935 Private equity investments 15,771 15,771 — — 15,771 Mutual funds held in rabbi trusts 14,140 14,140 14,140 — — Loans, net 24,538,196 24,507,141 — — 24,507,141 GGL/SBA loans servicing asset 4,101 4,101 — — 4,101 Derivative assets 11,722 11,722 — 11,722 — Financial liabilities Trading account liabilities 1,000 1,000 — 1,000 — Non-interest bearing deposits 7,686,339 7,686,339 — 7,686,339 — Non-time interest bearing deposits 13,941,814 13,941,814 — 13,941,814 — Time deposits 4,519,747 4,523,661 — 4,523,661 — Total deposits $ 26,147,900 $ 26,151,814 $ — $ 26,151,814 $ — Federal funds purchased, other short-term borrowings and other short-term liabilities 161,190 161,190 161,190 — — Long-term debt 1,706,138 1,721,814 — 1,721,814 — Earnout liabilities 11,348 11,348 — — 11,348 Derivative liabilities 17,097 17,097 — 12,767 4,330

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Summary of Derivative Instruments [Abstract]
Impact of Derivatives on Balance Sheet	The impact of derivative instruments on the Consolidated Balance Sheets at June 30, 2018 and December 31, 2017 is presented below. Fair Value of Derivative Assets Fair Value of Derivative Liabilities (in thousands) Location on Consolidated Balance Sheets June 30, 2018 December 31, 2017 Location on Consolidated Balance Sheets June 30, 2018 December 31, 2017 Derivatives not designated as hedging instruments: Interest rate contracts Other assets $ 10,034 $ 10,786 Other liabilities $ 19,303 $ 12,638 Mortgage derivatives Other assets 1,302 936 Other liabilities 248 129 Visa derivative — — Other liabilities 5,943 4,330 Total derivatives not designated as hedging instruments $ 11,336 $ 11,722 $ 25,494 $ 17,097
Effect of Fair Value Hedges on Consolidated Statements of Income	The pre-tax effect of fair value hedges on the consolidated statements of income for the six and three months ended June 30, 2018 and 2017 is presented below. Location of Gain (Loss) Recognized in Income Gain (Loss) Recognized in Income (in thousands) Six Months Ended June 30, Derivatives not designated as hedging instruments 2018 2017 Interest rate contracts (1) Other non-interest income $ (9 ) $ (1 ) Mortgage derivatives (2) Mortgage banking income 247 (2,073 ) Total $ 238 $ (2,074 ) Location of Gain (Loss) Recognized in Income Gain (Loss) Recognized in Income (in thousands) Three Months Ended June 30, Derivatives not designated as hedging instruments 2018 2017 Interest rate contracts (1) Other non-interest income $ (16 ) $ — Mortgage derivatives (2) Mortgage banking income (680 ) (289 ) Total $ (696 ) $ (289 ) (1) Gain (loss) represents net fair value adjustments (including credit related adjustments) for customer swaps and offsetting positions. (2) Gain (loss) represents net fair value adjustments recorded for interest rate lock commitments and commitments to sell mortgage loans to third-party investors.

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Schedule of Basic And Diluted Earnings per Share	The following table displays a reconciliation of the information used in calculating basic and diluted earnings per common share for the six and three months ended June 30, 2018 and 2017 . Six Months Ended June 30, Three Months Ended June 30, (in thousands, except per share data) 2018 2017 2018 2017 Basic Net Income Per Common Share: Net income available to common shareholders $ 209,229 $ 142,742 $ 108,622 $ 73,444 Weighted average common shares outstanding 118,531 122,251 118,397 122,203 Net income per common share, basic $ 1.77 $ 1.17 $ 0.92 $ 0.60 Diluted Net Income Per Common Share: Net income available to common shareholders $ 209,229 $ 142,742 $ 108,622 $ 73,444 Weighted average common shares outstanding 118,531 122,251 118,397 122,203 Potentially dilutive shares from outstanding equity-based awards and Earnout Payments 698 792 742 824 Weighted average diluted common shares 119,229 123,043 119,139 123,027 Net income per common share, diluted $ 1.75 $ 1.16 $ 0.91 $ 0.60

Non-interest Income (Tables)

Non-interest Income (Tables)	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Non-interest Income	The following table reflects revenue disaggregated by revenue type and line of business for the six and three months ended June 30, 2018 and 2017 . Non-interest Income by Line of Business For the Six Months Ended June 30, 2018 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 39,938 $ 11,404 $ 985 $ 26,518 $ — $ 1,031 Fiduciary and asset management fees 27,419 — — — 27,419 — Card fees 21,032 420 — 20,612 — — Brokerage revenue 17,596 — — — 17,596 — Insurance revenue 3,092 — — — 3,092 — Other fees 1,588 — — 1,033 — 555 $ 110,665 $ 11,824 $ 985 $ 48,163 $ 48,107 $ 1,586 Other revenues (1) 29,768 5,841 3,581 3,242 11,408 5,696 Total non-interest income $ 140,433 $ 17,665 $ 4,566 $ 51,405 $ 59,515 $ 7,282 For the Six Months Ended June 30, 2017 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 40,370 $ 11,415 $ 887 $ 26,970 $ — $ 1,098 Fiduciary and asset management fees 24,676 — — — 24,676 — Card fees 19,885 437 — 19,448 — — Brokerage revenue 14,436 — — — 14,436 — Insurance revenue 2,364 — — — 2,364 — Other fees 1,590 — — 1,060 — 530 $ 103,321 $ 11,852 $ 887 $ 47,478 $ 41,476 $ 1,628 Other revenues (1) 37,218 4,641 4,376 3,183 13,413 11,605 Total non-interest income $ 140,539 $ 16,493 $ 5,263 $ 50,661 $ 54,889 $ 13,233 ( 1) Other revenues primarily relate to revenues not derived from contracts with customers. Non-interest Income by Line of Business For the Three Months Ended June 30, 2018 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 19,999 $ 5,724 $ 453 $ 13,096 $ — $ 726 Fiduciary and asset management fees 13,983 — — — 13,983 — Card fees 10,833 215 — 10,618 — — Brokerage revenue 8,900 — — — 8,900 — Insurance revenue 1,879 — — — 1,879 — Other fees 756 — — 474 — 282 $ 56,350 $ 5,939 $ 453 $ 24,188 $ 24,762 $ 1,008 Other revenues (1) 17,037 3,390 1,848 1,713 5,565 4,521 Total non-interest income $ 73,387 $ 9,329 $ 2,301 $ 25,901 $ 30,327 $ 5,529 For the Three Months Ended June 30, 2017 (in thousands) Total Community Banking Corporate Banking Retail Banking Financial Management Services Other Service charges on deposit accounts $ 20,252 $ 5,644 $ 428 $ 13,533 $ — $ 647 Fiduciary and asset management fees 12,524 — — — 12,524 — Card fees 10,041 218 — 9,823 — — Brokerage revenue 7,210 — — — 7,210 — Insurance revenue 1,060 — — — 1,060 — Other fees 748 — — 486 — 262 $ 51,835 $ 5,862 $ 428 $ 23,842 $ 20,794 $ 909 Other revenues (1) 16,866 2,993 2,758 1,618 6,816 2,681 Total non-interest income $ 68,701 $ 8,855 $ 3,186 $ 25,460 $ 27,610 $ 3,590 ( 1) Other revenues primarily relate to revenues not derived from contracts with customers.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Loan Commitments and Letters of Credit	Unfunded letters of credit and lending commitments at June 30, 2018 and December 31, 2017 are presented below. (in thousands) June 30, 2018 December 31, 2017 Letters of credit* $ 179,860 $ 153,372 Commitments to fund commercial and industrial loans 5,361,671 5,090,827 Commitments to fund commercial real estate, construction, and land development loans 1,652,834 1,567,583 Commitments under home equity lines of credit 1,179,074 1,137,714 Unused credit card lines 743,376 779,254 Other loan commitments 365,861 351,358 Total unfunded lending commitments and letters of credit $ 9,482,676 $ 9,080,108 * Represent the contractual amount net of risk participations of approximately $70 million and $77 million at June 30, 2018 and December 31, 2017, respectively.

Significant Accounting Polici33

Significant Accounting Policies (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)ATMbranch	Dec. 31, 2017USD ($)	Jan. 01, 2018USD ($)	Dec. 31, 2016USD ($)
Accounting Policies [Abstract]
Number of branches | branch	250
Number of ATMs | ATM	334
Collateral requirements	$ 30,600	$ 43,800
Provisional income tax expense		47,200
Reclassification from AOCI to retained earnings, tax effect	7,600
Basis Of Presentation [Line Items]
Retained earnings	700,688	544,207
Adjustment from adoption of ASU		(685)		$ 0
ASU 2014-09
Basis Of Presentation [Line Items]
Adjustment from adoption of ASU		(685)
ASU 2016-01
Basis Of Presentation [Line Items]
Adjustment from adoption of ASU	3,200	0	$ 3,200
ASU 2016-01 | Accumulated Other Comprehensive Income (Loss)
Basis Of Presentation [Line Items]
Adjustment from adoption of ASU		117
Difference between Revenue Guidance in Effect before and after Topic 606 | ASU 2014-09
Basis Of Presentation [Line Items]
Retained earnings			$ (685)
Cash and Cash Equivalents
Basis Of Presentation [Line Items]
Cash and cash equivalents	35,700	8,600
Interest earning deposits with banks	$ 2,700	$ 5,900

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Thousands	Sep. 25, 2017	Oct. 01, 2016	Nov. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Brokered deposits				$ 1,851,010	$ 1,961,125
Common stock, shares issued (in shares)				143,077,973	142,677,449
Common stock				$ 143,078	$ 142,678
Minimum
Business Acquisition [Line Items]
Period of additional annual payments				3 years
Maximum
Business Acquisition [Line Items]
Period of additional annual payments				5 years
World's Foremost Bank (WFB)
Business Acquisition [Line Items]
Brokered deposits	$ 1,100,000
Deposits portfolio, weighted average maturity, period	2 years 6 months 11 days
Weighted average rate of deposit, brokered	1.83%
Proceeds from fees	$ 75,000
Global One
Business Acquisition [Line Items]
Consideration transferred		$ 30,000
Common stock, shares issued (in shares)		821,000
Common stock		$ 26,600
Cash paid		$ 3,400
Earnout payment of stock and cash			$ 6,400
Earnout liability				$ 11,300
Global One | Minimum
Business Acquisition [Line Items]
Potential additional payments based on earnings, period		3 years
Global One | Maximum
Business Acquisition [Line Items]
Potential additional payments based on earnings, period		5 years

Share Repurchase Program (Detai

Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions	5 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jan. 23, 2018
Equity [Abstract]
Authorized amount				$ 150,000,000
Value repurchased	$ 76,800,000	$ 76,810,000	$ 45,349,000
Shares repurchased (in shares)	1.5
Shares repurchased, average cost per share (in dollars per share)	$ 52.72

Investment Securities Availab36

Investment Securities Available for Sale (Summary Of Available For Sale Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 4,066,601	$ 4,038,239
Gross Unrealized Gains	672	6,107
Gross Unrealized Losses	(137,311)	(57,277)
Fair Value	3,929,962	3,987,069
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	122,800	83,608
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,167)	(934)
Fair Value	120,633	82,674
U.S. Government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	40,753	10,771
Gross Unrealized Gains	181	91
Gross Unrealized Losses	0	0
Fair Value	40,934	10,862
Mortgage-backed securities issued by U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	111,406	121,283
Gross Unrealized Gains	107	519
Gross Unrealized Losses	(3,569)	(1,362)
Fair Value	107,944	120,440
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,614,668	2,666,818
Gross Unrealized Gains	59	5,059
Gross Unrealized Losses	(87,882)	(31,354)
Fair Value	2,526,845	2,640,523
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,159,859	1,135,259
Gross Unrealized Gains	139	144
Gross Unrealized Losses	(43,550)	(23,404)
Fair Value	1,116,448	1,111,999
State and municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	115	180
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	115	180
Corporate debt and other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,000	20,320
Gross Unrealized Gains	186	294
Gross Unrealized Losses	(143)	(223)
Fair Value	$ 17,043	$ 20,391

Investment Securities Availab37

Investment Securities Available for Sale (Narrative) (Details) $ in Thousands	Jun. 30, 2018USD ($)position	Jan. 01, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Financing Receivable, Impaired [Line Items]
Investment securities in a loss position for less than twelve months | position	80
Investment securities in a loss position for twelve months or longer | position	55
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment from adoption of ASU			$ (685)	$ 0
Collateral Pledged
Financing Receivable, Impaired [Line Items]
Pledged to secure deposits	$ 1,350,000		2,000,000
ASU 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment from adoption of ASU	$ 3,200	$ 3,200	$ 0

Investment Securities Availab38

Investment Securities Available for Sale (Schedule Of Unrealized Loss On Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 2,408,657	$ 1,995,846
Less than 12 Months, Unrealized Losses	72,397	20,560
12 Months or Longer, Fair Value	1,324,605	1,445,859
12 Months or Longer, Unrealized Losses	64,914	36,717
Total Fair Value, Fair Value	3,733,262	3,441,705
Total Fair Value, Unrealized Losses	137,311	57,277
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	72,386	34,243
Less than 12 Months, Unrealized Losses	1,378	443
12 Months or Longer, Fair Value	29,255	29,562
12 Months or Longer, Unrealized Losses	789	491
Total Fair Value, Fair Value	101,641	63,805
Total Fair Value, Unrealized Losses	2,167	934
Mortgage-backed securities issued by U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	23,240	36,810
Less than 12 Months, Unrealized Losses	632	357
12 Months or Longer, Fair Value	67,765	55,740
12 Months or Longer, Unrealized Losses	2,937	1,005
Total Fair Value, Fair Value	91,005	92,550
Total Fair Value, Unrealized Losses	3,569	1,362
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	1,703,526	1,271,012
Less than 12 Months, Unrealized Losses	49,197	10,263
12 Months or Longer, Fair Value	812,767	929,223
12 Months or Longer, Unrealized Losses	38,685	21,091
Total Fair Value, Fair Value	2,516,293	2,200,235
Total Fair Value, Unrealized Losses	87,882	31,354
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	609,505	653,781
Less than 12 Months, Unrealized Losses	21,190	9,497
12 Months or Longer, Fair Value	412,961	426,237
12 Months or Longer, Unrealized Losses	22,360	13,907
Total Fair Value, Fair Value	1,022,466	1,080,018
Total Fair Value, Unrealized Losses	43,550	23,404
Corporate debt and other debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or Longer, Fair Value	1,857	5,097
12 Months or Longer, Unrealized Losses	143	223
Total Fair Value, Fair Value	1,857	5,097
Total Fair Value, Unrealized Losses	$ 143	$ 223

Investment Securities Availab39

Investment Securities Available for Sale (Amortized Cost And Estimated Fair Value By Contractual Maturity Of Investment Securities Available For Sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Within One year, Amortized Cost	$ 21,439
1 to 5 Years, Amortized Cost	111,715
5 to 10 Years, Amortized Cost	707,400
More Than 10 years, Amortized Cost	3,226,047
Amortized Cost	4,066,601	$ 4,038,239
Fair Value
Within One Year, Fair Value	21,446
1 to 5 Years, Fair Value	109,615
5 to 10 Years, Fair Value	687,815
More Than 10 years, Fair Value	3,111,086
Total, Fair Value	3,929,962	3,987,069
U.S. Treasury securities
Amortized Cost
Within One year, Amortized Cost	18,993
1 to 5 Years, Amortized Cost	103,807
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
Amortized Cost	122,800	83,608
Fair Value
Within One Year, Fair Value	18,993
1 to 5 Years, Fair Value	101,640
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
Total, Fair Value	120,633	82,674
U.S. Government agency securities
Amortized Cost
Within One year, Amortized Cost	2,330
1 to 5 Years, Amortized Cost	6,437
5 to 10 Years, Amortized Cost	31,986
More Than 10 years, Amortized Cost	0
Amortized Cost	40,753	10,771
Fair Value
Within One Year, Fair Value	2,337
1 to 5 Years, Fair Value	6,455
5 to 10 Years, Fair Value	32,142
More Than 10 years, Fair Value	0
Total, Fair Value	40,934	10,862
Mortgage-backed securities issued by U.S. Government agencies
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	27,725
More Than 10 years, Amortized Cost	83,681
Amortized Cost	111,406	121,283
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	27,266
More Than 10 years, Fair Value	80,678
Total, Fair Value	107,944	120,440
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Amortized Cost
Within One year, Amortized Cost	1
1 to 5 Years, Amortized Cost	1,471
5 to 10 Years, Amortized Cost	615,334
More Than 10 years, Amortized Cost	1,997,862
Amortized Cost	2,614,668	2,666,818
Fair Value
Within One Year, Fair Value	1
1 to 5 Years, Fair Value	1,520
5 to 10 Years, Fair Value	596,366
More Than 10 years, Fair Value	1,928,958
Total, Fair Value	2,526,845	2,640,523
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	17,355
More Than 10 years, Amortized Cost	1,142,504
Amortized Cost	1,159,859
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	16,855
More Than 10 years, Fair Value	1,099,593
Total, Fair Value	1,116,448
State and municipal securities
Amortized Cost
Within One year, Amortized Cost	115
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
Amortized Cost	115	180
Fair Value
Within One Year, Fair Value	115
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
Total, Fair Value	115	180
Corporate debt and other debt securities
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	15,000
More Than 10 years, Amortized Cost	2,000
Amortized Cost	17,000	20,320
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	15,186
More Than 10 years, Fair Value	1,857
Total, Fair Value	$ 17,043	$ 20,391

Investment Securities Availab40

Investment Securities Available for Sale (Summary Of Sales Transactions In The Investment Securities Available For Sale Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments [Abstract]
Proceeds from sales of investment securities available for sale	$ 35,066	$ 55,752	$ 35,066	$ 338,381
Gross realized gains on sales	0	239	0	7,942
Gross realized losses on sales	(1,296)	(240)	(1,296)	(275)
Investment securities (losses) gains, net	$ (1,296)	$ (1)	$ (1,296)	$ 7,667

Restructuring Charges (Schedule

Restructuring Charges (Schedule Of Restructuring And Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Charges [Abstract]
Severance charges	$ 0	$ 0	$ 0	$ 6,453
Other charges, net	103	13	(212)	71
Total restructuring charges, net	$ 103	$ 13	$ (212)	$ 6,524

Restructuring Charges (Narrativ

Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Accruals for lease terminations			$ (377)	$ 6,453
Restructuring charges	$ 103	$ 13	(212)	6,524
Special termination benefits				6,200
Other Property Related Charges
Restructuring Cost and Reserve [Line Items]
Accruals for lease terminations			165
Severance Charges
Restructuring Cost and Reserve [Line Items]
Accruals for lease terminations			$ 0	6,453
Restructuring charges				$ 6,500

Restructuring Charges (Restruct

Restructuring Charges (Restructuring Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Reserve [Roll Forward]
Beginning balance	$ 2,506	$ 10,004	$ 3,612	$ 4,049
Accruals for lease terminations			(377)	6,453
Payments	(638)	(2,743)	(1,367)	(3,241)
Ending balance	1,868	7,261	1,868	7,261
Severance Charges
Restructuring Reserve [Roll Forward]
Beginning balance	0	6,315	336	81
Accruals for lease terminations			0	6,453
Payments	0	(2,584)	(336)	(2,803)
Ending balance	0	3,731	0	3,731
Lease Termination Charges
Restructuring Reserve [Roll Forward]
Beginning balance	2,506	3,689	3,276	3,968
Accruals for lease terminations			(377)	0
Payments	(638)	(159)	(1,031)	(438)
Ending balance	$ 1,868	$ 3,530	$ 1,868	$ 3,530

Loans and Allowance for Loan 44

Loans and Allowance for Loan Losses (Schedule Of Current, Accruing Past Due And Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	$ 25,134,056	$ 24,787,464
Non-accrual	117,328	115,561
Total loans	25,156,773	24,812,795	$ 24,456,550
Deferred fees and costs, net	22,700	25,300	$ 26,000
Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	87,307	76,784
Total loans	12,275,472	12,023,650
Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	81,231	70,130
Total loans	7,271,080	7,179,487
Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	6,076	6,654
Total loans	5,004,392	4,844,163
Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	9,609	12,450
Total loans	6,644,171	6,935,288
Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	1,738	3,804
Total loans	5,509,596	5,670,065
Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	3,247	2,849
Total loans	720,710	781,619
Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	4,624	5,797
Total loans	413,865	483,604
Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	20,412	26,327
Total loans	6,237,130	5,853,857
Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	14,265	17,455
Total loans	1,453,855	1,514,227
Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	4,822	7,203
Total loans	2,750,935	2,633,503
Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0	0
Total loans	238,424	232,676
Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	1,325	1,669
Total loans	1,793,916	1,473,451
Current
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	24,983,831	24,645,203
Current | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	12,164,915	11,927,277
Current | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,170,877	7,097,127
Current | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	4,994,038	4,830,150
Current | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,628,202	6,914,819
Current | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	5,505,409	5,663,665
Current | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	715,154	775,023
Current | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	407,639	476,131
Current | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,190,714	5,803,107
Current | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,430,778	1,490,808
Current | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,741,064	2,622,061
Current | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	235,406	229,015
Current | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,783,466	1,461,223
Accruing 30-89 Days Past Due
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	52,392	47,617
Accruing 30-89 Days Past Due | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	22,605	18,094
Accruing 30-89 Days Past Due | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	18,425	11,214
Accruing 30-89 Days Past Due | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	4,180	6,880
Accruing 30-89 Days Past Due | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	5,749	7,660
Accruing 30-89 Days Past Due | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,838	2,506
Accruing 30-89 Days Past Due | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,309	3,545
Accruing 30-89 Days Past Due | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,602	1,609
Accruing 30-89 Days Past Due | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	24,038	21,863
Accruing 30-89 Days Past Due | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	8,450	5,629
Accruing 30-89 Days Past Due | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	4,805	3,971
Accruing 30-89 Days Past Due | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,793	1,930
Accruing 30-89 Days Past Due | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	8,990	10,333
Accruing 90 Days or Greater Past Due
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,222	4,414
Accruing 90 Days or Greater Past Due | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	645	1,495
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	547	1,016
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	98	479
Accruing 90 Days or Greater Past Due | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	611	359
Accruing 90 Days or Greater Past Due | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	611	90
Accruing 90 Days or Greater Past Due | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0	202
Accruing 90 Days or Greater Past Due | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0	67
Accruing 90 Days or Greater Past Due | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,966	2,560
Accruing 90 Days or Greater Past Due | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	362	335
Accruing 90 Days or Greater Past Due | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	244	268
Accruing 90 Days or Greater Past Due | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,225	1,731
Accruing 90 Days or Greater Past Due | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	135	226
Total Accruing Past Due
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	55,614	52,031
Total Accruing Past Due | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	23,250	19,589
Total Accruing Past Due | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	18,972	12,230
Total Accruing Past Due | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	4,278	7,359
Total Accruing Past Due | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,360	8,019
Total Accruing Past Due | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,449	2,596
Total Accruing Past Due | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,309	3,747
Total Accruing Past Due | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,602	1,676
Total Accruing Past Due | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	26,004	24,423
Total Accruing Past Due | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	8,812	5,964
Total Accruing Past Due | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	5,049	4,239
Total Accruing Past Due | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,018	3,661
Total Accruing Past Due | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	$ 9,125	$ 10,559

Loans and Allowance for Loan 45

Loans and Allowance for Loan Losses (Narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract	Dec. 31, 2017USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	$ 194,231,000	$ 232,500,000	$ 196,181,000	$ 233,800,000	$ 223,009,000
Interest income recognized	1,349,000	0	2,781,000	0	6,961,000
Interest income recognized for accruing TDRs	1,700,000	1,800,000		3,500,000
Non-accrual status	63,700,000		63,700,000		49,000,000
Recorded investment	15,878,000	3,770,000	25,365,000	15,377,000
Provision for loan losses	11,790,000	$ 10,260,000	24,566,000	$ 18,934,000
Accruing TDRs With Modifications And Renewals Completed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan losses			$ 6,500,000		8,700,000
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loan substandard period (in days)			90 days
Loss And Charged Off
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loans downgraded to loss (in days)			120 days
Accruing TDRs With Modifications And Renewals Completed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing troubled debt restructuring	$ 125,300,000		$ 125,300,000		$ 151,300,000
Accruing TDRs With Modifications And Renewals Completed | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial-type impaired loans			$ 1,000,000
Troubled Debt Restructuring That Subsequently Defaults
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of contracts | contract	8	3	8	3
Recorded investment	$ 10,500,000	$ 292,000	$ 10,500,000	$ 292,000

Loans and Allowance for Loan 46

Loans and Allowance for Loan Losses (Loan Portfolio Credit Exposure) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 25,156,773	$ 24,812,795	$ 24,456,550
Accrual substandard loans	209,600	190,600
Deferred fees and costs, net	$ 22,700	25,300	$ 26,000
Maximum
Financing Receivable, Recorded Investment [Line Items]
Allowance for loan losses, percent of loan amount	50.00%
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 24,569,082	24,222,726
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	260,760	283,865
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	317,888	297,640
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,903	5,358
Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,140	3,206
Total commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,275,472	12,023,650
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,271,080	7,179,487
Total commercial and industrial | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,004,392	4,844,163
Total commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,870,017	11,643,383
Total commercial and industrial | Pass | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,996,081	6,929,506
Total commercial and industrial | Pass | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,873,936	4,713,877
Total commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	170,624	166,052
Total commercial and industrial | Special Mention | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans	107,251	115,912
Total commercial and industrial | Special Mention | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	63,373	50,140
Total commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	231,591	212,891
Total commercial and industrial | Substandard | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans	164,581	132,818
Total commercial and industrial | Substandard | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	67,010	80,073
Total commercial and industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,240	1,324
Total commercial and industrial | Doubtful | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,167	1,251
Total commercial and industrial | Doubtful | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	73	73
Total commercial and industrial | Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial and industrial | Loss | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial and industrial | Loss | Owner-occupied
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,644,171	6,935,288
Total commercial real estate | Investment properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,509,596	5,670,065
Total commercial real estate | 1-4 family properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	720,710	781,619
Total commercial real estate | Land and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	413,865	483,604
Total commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,490,330	6,763,850
Total commercial real estate | Pass | Investment properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,422,727	5,586,792
Total commercial real estate | Pass | 1-4 family properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	698,532	745,299
Total commercial real estate | Pass | Land and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	369,071	431,759
Total commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	90,136	117,813
Total commercial real estate | Special Mention | Investment properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	51,279	64,628
Total commercial real estate | Special Mention | 1-4 family properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,245	19,419
Total commercial real estate | Special Mention | Land and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	29,612	33,766
Total commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	60,576	50,496
Total commercial real estate | Substandard | Investment properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	35,590	18,645
Total commercial real estate | Substandard | 1-4 family properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,933	16,901
Total commercial real estate | Substandard | Land and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,053	14,950
Total commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,129	3,129
Total commercial real estate | Doubtful | Investment properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial real estate | Doubtful | 1-4 family properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial real estate | Doubtful | Land and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,129	3,129
Total commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial real estate | Loss | Investment properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial real estate | Loss | 1-4 family properties
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total commercial real estate | Loss | Land and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,237,130	5,853,857
Total consumer | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,453,855	1,514,227
Total consumer | Consumer mortgages
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,750,935	2,633,503
Total consumer | Credit cards
Financing Receivable, Recorded Investment [Line Items]
Total loans	238,424	232,676
Total consumer | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,793,916	1,473,451
Total consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,208,735	5,815,493
Total consumer | Pass | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,435,724	1,491,105
Total consumer | Pass | Consumer mortgages
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,743,245	2,622,499
Total consumer | Pass | Credit cards
Financing Receivable, Recorded Investment [Line Items]
Total loans	237,198	230,945
Total consumer | Pass | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,792,568	1,470,944
Total consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer | Special Mention | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer | Special Mention | Consumer mortgages
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer | Special Mention | Credit cards
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer | Special Mention | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,721	34,253
Total consumer | Substandard | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,599	21,079
Total consumer | Substandard | Consumer mortgages
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,588	10,607
Total consumer | Substandard | Credit cards
Financing Receivable, Recorded Investment [Line Items]
Total loans	447	399
Total consumer | Substandard | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,087	2,168
Total consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	534	905
Total consumer | Doubtful | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	175	285
Total consumer | Doubtful | Consumer mortgages
Financing Receivable, Recorded Investment [Line Items]
Total loans	102	291
Total consumer | Doubtful | Credit cards
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Total consumer | Doubtful | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	257	329
Total consumer | Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,140	3,206
Total consumer | Loss | Home equity lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,357	1,758
Total consumer | Loss | Consumer mortgages
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	106
Total consumer | Loss | Credit cards
Financing Receivable, Recorded Investment [Line Items]
Total loans	779	1,332
Total consumer | Loss | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 4	$ 10

Loans and Allowance for Loan 47

Loans and Allowance for Loan Losses (Schedule Of Allowances For Loan Losses And Recorded Investment In Loans) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Allowance for loan losses:
Beginning balance, allowance	$ 257,764,000	$ 253,514,000	$ 249,268,000	$ 251,758,000	$ 251,758,000
Charge-offs	(21,504,000)	(19,663,000)	(36,126,000)	(32,398,000)
Recoveries	3,675,000	3,984,000	14,017,000	9,801,000
Provision for loan losses	11,790,000	10,260,000	24,566,000	18,934,000
Ending balance, allowance	251,725,000	248,095,000	251,725,000	248,095,000	249,268,000
Ending balance: individually evaluated for impairment, allowance	14,932,000	12,650,000	14,932,000	12,650,000
Ending balance: collectively evaluated for impairment, allowance	236,793,000	235,445,000	236,793,000	235,445,000
Total loans	25,156,773,000	24,456,550,000	25,156,773,000	24,456,550,000	24,812,795,000
Ending balance: individually evaluated for impairment, loans	189,025,000	228,215,000	189,025,000	228,215,000
Ending balance: collectively evaluated for impairment, loans	24,967,748,000	24,228,335,000	24,967,748,000	24,228,335,000
Purchased credit-impaired loans	0	0		0
Allowance for purchased credit-impaired loans	0	0		0
Deferred fees and costs, net	22,700,000	26,000,000	22,700,000	26,000,000	25,300,000
Commercial & Industrial
Allowance for loan losses:
Beginning balance, allowance	134,745,000	127,096,000	126,803,000	125,778,000	125,778,000
Charge-offs	(15,770,000)	(12,642,000)	(23,786,000)	(19,535,000)
Recoveries	1,635,000	1,458,000	3,995,000	3,282,000
Provision for loan losses	9,725,000	7,525,000	23,323,000	13,912,000
Ending balance, allowance	130,335,000	123,437,000	130,335,000	123,437,000	126,803,000
Ending balance: individually evaluated for impairment, allowance	9,474,000	7,226,000	9,474,000	7,226,000
Ending balance: collectively evaluated for impairment, allowance	120,861,000	116,211,000	120,861,000	116,211,000
Total loans	12,275,472,000	11,742,945,000	12,275,472,000	11,742,945,000
Ending balance: individually evaluated for impairment, loans	107,544,000	122,889,000	107,544,000	122,889,000
Ending balance: collectively evaluated for impairment, loans	12,167,928,000	11,620,056,000	12,167,928,000	11,620,056,000
Commercial Real Estate
Allowance for loan losses:
Beginning balance, allowance	73,991,000	78,314,000	74,998,000	81,816,000	81,816,000
Charge-offs	(523,000)	(1,299,000)	(2,446,000)	(3,207,000)
Recoveries	480,000	759,000	6,964,000	3,648,000
Provision for loan losses	1,257,000	(247,000)	(4,311,000)	(4,730,000)
Ending balance, allowance	75,205,000	77,527,000	75,205,000	77,527,000	74,998,000
Ending balance: individually evaluated for impairment, allowance	4,687,000	4,386,000	4,687,000	4,386,000
Ending balance: collectively evaluated for impairment, allowance	70,518,000	73,141,000	70,518,000	73,141,000
Total loans	6,644,171,000	7,422,234,000	6,644,171,000	7,422,234,000
Ending balance: individually evaluated for impairment, loans	53,805,000	73,638,000	53,805,000	73,638,000
Ending balance: collectively evaluated for impairment, loans	6,590,366,000	7,348,596,000	6,590,366,000	7,348,596,000
Consumer
Allowance for loan losses:
Beginning balance, allowance	49,028,000	48,104,000	47,467,000	44,164,000	44,164,000
Charge-offs	(5,211,000)	(5,722,000)	(9,894,000)	(9,656,000)
Recoveries	1,560,000	1,767,000	3,058,000	2,871,000
Provision for loan losses	808,000	2,982,000	5,554,000	9,752,000
Ending balance, allowance	46,185,000	47,131,000	46,185,000	47,131,000	$ 47,467,000
Ending balance: individually evaluated for impairment, allowance	771,000	1,038,000	771,000	1,038,000
Ending balance: collectively evaluated for impairment, allowance	45,414,000	46,093,000	45,414,000	46,093,000
Total loans	6,237,130,000	5,291,371,000	6,237,130,000	5,291,371,000
Ending balance: individually evaluated for impairment, loans	27,676,000	31,688,000	27,676,000	31,688,000
Ending balance: collectively evaluated for impairment, loans	$ 6,209,454,000	$ 5,259,683,000	$ 6,209,454,000	$ 5,259,683,000

Loans and Allowance for Loan 48

Loans and Allowance for Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 21,611,000		$ 21,611,000		$ 11,022,000
Recorded Investment, With allowance recorded	167,414,000		167,414,000		189,264,000
Recorded Investment	189,025,000		189,025,000		200,286,000
Unpaid Principal Balance, With no related allowance recorded	32,545,000		32,545,000		14,259,000
Unpaid Principal Balance, With allowance recorded	169,434,000		169,434,000		189,498,000
Unpaid Principal Balance	201,979,000		201,979,000		203,757,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	14,933,000		14,933,000		14,908,000
Related Allowance	14,933,000		14,933,000		14,908,000
Average Recorded Investment, With no related allowance recorded	16,079,000		13,901,000		32,314,000
Average Recorded Investment, With allowance recorded	178,152,000		182,280,000		190,695,000
Average Recorded Investment	194,231,000	$ 232,500,000	196,181,000	$ 233,800,000	223,009,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	1,349,000		2,781,000		6,961,000
Interest Income Recognized	1,349,000	$ 0	2,781,000	$ 0	6,961,000
Total commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	21,549,000		21,549,000		8,220,000
Recorded Investment, With allowance recorded	85,995,000		85,995,000		103,114,000
Recorded Investment	107,544,000		107,544,000		111,334,000
Unpaid Principal Balance, With no related allowance recorded	32,458,000		32,458,000		9,576,000
Unpaid Principal Balance, With allowance recorded	86,269,000		86,269,000		103,292,000
Unpaid Principal Balance	118,727,000		118,727,000		112,868,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	9,473,000		9,473,000		9,515,000
Related Allowance	9,473,000		9,473,000		9,515,000
Average Recorded Investment, With no related allowance recorded	13,575,000		11,129,000		28,351,000
Average Recorded Investment, With allowance recorded	96,362,000		100,637,000		90,966,000
Average Recorded Investment	109,937,000		111,766,000		119,317,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	528,000		1,158,000		2,992,000
Interest Income Recognized	528,000		1,158,000		2,992,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	21,549,000		21,549,000		8,220,000
Recorded Investment, With allowance recorded	45,171,000		45,171,000		65,715,000
Recorded Investment	66,720,000		66,720,000		73,935,000
Unpaid Principal Balance, With no related allowance recorded	32,458,000		32,458,000		9,576,000
Unpaid Principal Balance, With allowance recorded	45,385,000		45,385,000		65,851,000
Unpaid Principal Balance	77,843,000		77,843,000		75,427,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	6,813,000		6,813,000		7,406,000
Related Allowance	6,813,000		6,813,000		7,406,000
Average Recorded Investment, With no related allowance recorded	13,575,000		11,129,000		21,686,000
Average Recorded Investment, With allowance recorded	57,930,000		62,564,000		50,468,000
Average Recorded Investment	71,505,000		73,693,000		72,154,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	155,000		428,000		1,610,000
Interest Income Recognized	155,000		428,000		1,610,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	40,824,000		40,824,000		37,399,000
Recorded Investment	40,824,000		40,824,000		37,399,000
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	40,884,000		40,884,000		37,441,000
Unpaid Principal Balance	40,884,000		40,884,000		37,441,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	2,660,000		2,660,000		2,109,000
Related Allowance	2,660,000		2,660,000		2,109,000
Average Recorded Investment, With no related allowance recorded	0		0		6,665,000
Average Recorded Investment, With allowance recorded	38,432,000		38,073,000		40,498,000
Average Recorded Investment	38,432,000		38,073,000		47,163,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	373,000		730,000		1,382,000
Interest Income Recognized	373,000		730,000		1,382,000
Total commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		56,000
Recorded Investment, With allowance recorded	53,805,000		53,805,000		56,840,000
Recorded Investment	53,805,000		53,805,000		56,896,000
Unpaid Principal Balance, With no related allowance recorded	0		0		1,740,000
Unpaid Principal Balance, With allowance recorded	55,545,000		55,545,000		56,896,000
Unpaid Principal Balance	55,545,000		55,545,000		58,636,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	4,688,000		4,688,000		4,240,000
Related Allowance	4,688,000		4,688,000		4,240,000
Average Recorded Investment, With no related allowance recorded	0		19,000		2,262,000
Average Recorded Investment, With allowance recorded	54,084,000		53,350,000		68,344,000
Average Recorded Investment	54,084,000		53,369,000		70,606,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	520,000		1,010,000		2,473,000
Interest Income Recognized	520,000		1,010,000		2,473,000
Total commercial real estate | Investment properties
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	24,218,000		24,218,000		23,364,000
Recorded Investment	24,218,000		24,218,000		23,364,000
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	24,218,000		24,218,000		23,364,000
Unpaid Principal Balance	24,218,000		24,218,000		23,364,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	1,659,000		1,659,000		1,100,000
Related Allowance	1,659,000		1,659,000		1,100,000
Average Recorded Investment, With no related allowance recorded	0		0		123,000
Average Recorded Investment, With allowance recorded	24,439,000		23,604,000		28,749,000
Average Recorded Investment	24,439,000		23,604,000		28,872,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	220,000		418,000		1,144,000
Interest Income Recognized	220,000		418,000		1,144,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	10,458,000		10,458,000		15,056,000
Recorded Investment	10,458,000		10,458,000		15,056,000
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	10,458,000		10,458,000		15,056,000
Unpaid Principal Balance	10,458,000		10,458,000		15,056,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	309,000		309,000		504,000
Related Allowance	309,000		309,000		504,000
Average Recorded Investment, With no related allowance recorded	0		0		323,000
Average Recorded Investment, With allowance recorded	11,217,000		11,466,000		16,257,000
Average Recorded Investment	11,217,000		11,466,000		16,580,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	226,000		442,000		925,000
Interest Income Recognized	226,000		442,000		925,000
Total commercial real estate | Land and development
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		56,000
Recorded Investment, With allowance recorded	19,129,000		19,129,000		18,420,000
Recorded Investment	19,129,000		19,129,000		18,476,000
Unpaid Principal Balance, With no related allowance recorded	0		0		1,740,000
Unpaid Principal Balance, With allowance recorded	20,869,000		20,869,000		18,476,000
Unpaid Principal Balance	20,869,000		20,869,000		20,216,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	2,720,000		2,720,000		2,636,000
Related Allowance	2,720,000		2,720,000		2,636,000
Average Recorded Investment, With no related allowance recorded	0		19,000		1,816,000
Average Recorded Investment, With allowance recorded	18,428,000		18,280,000		23,338,000
Average Recorded Investment	18,428,000		18,299,000		25,154,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	74,000		150,000		404,000
Interest Income Recognized	74,000		150,000		404,000
Total consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	62,000		62,000		2,746,000
Recorded Investment, With allowance recorded	27,614,000		27,614,000		29,310,000
Recorded Investment	27,676,000		27,676,000		32,056,000
Unpaid Principal Balance, With no related allowance recorded	87,000		87,000		2,943,000
Unpaid Principal Balance, With allowance recorded	27,620,000		27,620,000		29,310,000
Unpaid Principal Balance	27,707,000		27,707,000		32,253,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	772,000		772,000		1,153,000
Related Allowance	772,000		772,000		1,153,000
Average Recorded Investment, With no related allowance recorded	2,504,000		2,753,000		1,701,000
Average Recorded Investment, With allowance recorded	27,706,000		28,293,000		31,385,000
Average Recorded Investment	30,210,000		31,046,000		33,086,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	301,000		613,000		1,496,000
Interest Income Recognized	301,000		613,000		1,496,000
Total consumer | Home equity lines
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		2,746,000
Recorded Investment, With allowance recorded	3,915,000		3,915,000		5,096,000
Recorded Investment	3,915,000		3,915,000		7,842,000
Unpaid Principal Balance, With no related allowance recorded	0		0		2,943,000
Unpaid Principal Balance, With allowance recorded	3,915,000		3,915,000		5,096,000
Unpaid Principal Balance	3,915,000		3,915,000		8,039,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	174,000		174,000		114,000
Related Allowance	174,000		174,000		114,000
Average Recorded Investment, With no related allowance recorded	724,000		1,423,000		1,205,000
Average Recorded Investment, With allowance recorded	3,262,000		3,822,000		7,476,000
Average Recorded Investment	3,986,000		5,245,000		8,681,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	30,000		76,000		334,000
Interest Income Recognized	30,000		76,000		334,000
Total consumer | Consumer mortgages
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	62,000		62,000		0
Recorded Investment, With allowance recorded	18,767,000		18,767,000		18,668,000
Recorded Investment	18,829,000		18,829,000		18,668,000
Unpaid Principal Balance, With no related allowance recorded	87,000		87,000		0
Unpaid Principal Balance, With allowance recorded	18,767,000		18,767,000		18,668,000
Unpaid Principal Balance	18,854,000		18,854,000		18,668,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	350,000		350,000		569,000
Related Allowance	350,000		350,000		569,000
Average Recorded Investment, With no related allowance recorded	1,780,000		1,330,000		496,000
Average Recorded Investment, With allowance recorded	19,459,000		19,283,000		19,144,000
Average Recorded Investment	21,239,000		20,613,000		19,640,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	199,000		394,000		896,000
Interest Income Recognized	199,000		394,000		896,000
Total consumer | Credit cards
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	0		0		0
Related Allowance	0		0		0
Average Recorded Investment, With no related allowance recorded	0		0		0
Average Recorded Investment, With allowance recorded	4,985,000		0		0
Average Recorded Investment	4,985,000		0		0
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	0		0		0
Interest Income Recognized	0		0		0
Total consumer | Other consumer loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	4,932,000		4,932,000		5,546,000
Recorded Investment	4,932,000		4,932,000		5,546,000
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	4,938,000		4,938,000		5,546,000
Unpaid Principal Balance	4,938,000		4,938,000		5,546,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	248,000		248,000		470,000
Related Allowance	248,000		248,000		470,000
Average Recorded Investment, With no related allowance recorded	0		0		0
Average Recorded Investment, With allowance recorded	0		5,188,000		4,765,000
Average Recorded Investment	0		5,188,000		4,765,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	72,000		143,000		266,000
Interest Income Recognized	$ 72,000		$ 143,000		$ 266,000

Loans and Allowance for Loan 49

Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)Contract	Jun. 30, 2017USD ($)Contract	Jun. 30, 2018USD ($)Contract	Jun. 30, 2017USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	42	26	81	55
Recorded Investment	$ 15,878,000	$ 3,770,000	$ 25,365,000	$ 15,377,000
Net charge-offs	$ 0	$ 0	$ 0	$ 0
Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	9	11	20	29
Recorded Investment	$ 3,262,000	$ 2,657,000	$ 7,048,000	$ 12,061,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5	10	14	28
Recorded Investment	$ 576,000	$ 2,635,000	$ 1,565,000	$ 12,039,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4	1	6	1
Recorded Investment	$ 2,686,000	$ 22,000	$ 5,483,000	$ 22,000
Total commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	6	9	13	17
Recorded Investment	$ 8,545,000	$ 809,000	$ 11,469,000	$ 2,737,000
Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	0	3	0
Recorded Investment	$ 6,267,000	$ 0	$ 8,226,000	$ 0
Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	8	7	16
Recorded Investment	$ 492,000	$ 674,000	$ 1,457,000	$ 2,602,000
Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	3	1	3	1
Recorded Investment	$ 1,786,000	$ 135,000	$ 1,786,000	$ 135,000
Total consumer
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	27	6	48	9
Recorded Investment	$ 4,071,000	$ 304,000	$ 6,848,000	$ 579,000
Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	3	0	3	0
Recorded Investment	$ 320,000	$ 0	$ 320,000	$ 0
Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	7	1	14	1
Recorded Investment	$ 3,050,000	$ 9,000	$ 4,782,000	$ 9,000
Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	17	5	31	8
Recorded Investment	$ 701,000	$ 295,000	$ 1,746,000	$ 570,000
Principal Forgiveness
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total consumer
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness | Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Below Market Interest Rate
Financing Receivable, Modifications [Line Items]
Recorded Investment	11,628,000	2,373,000	17,567,000	7,849,000
Below Market Interest Rate | Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,094,000	1,895,000	4,799,000	5,760,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	1,895,000	0	5,760,000
Below Market Interest Rate | Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,094,000	0	4,799,000	0
Below Market Interest Rate | Total commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded Investment	6,011,000	478,000	6,976,000	2,089,000
Below Market Interest Rate | Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Recorded Investment	6,011,000	0	6,011,000	0
Below Market Interest Rate | Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	478,000	965,000	2,089,000
Below Market Interest Rate | Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Below Market Interest Rate | Total consumer
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,523,000	0	5,792,000	0
Below Market Interest Rate | Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Recorded Investment	172,000	0	172,000	0
Below Market Interest Rate | Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,963,000	0	4,695,000	0
Below Market Interest Rate | Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Below Market Interest Rate | Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Recorded Investment	388,000	0	925,000	0
Term Extensions and/or Other Concessions
Financing Receivable, Modifications [Line Items]
Recorded Investment	4,250,000	1,397,000	7,798,000	7,528,000
Term Extensions and/or Other Concessions | Total commercial and industrial
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,168,000	762,000	2,249,000	6,301,000
Term Extensions and/or Other Concessions | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Modifications [Line Items]
Recorded Investment	576,000	740,000	1,565,000	6,279,000
Term Extensions and/or Other Concessions | Total commercial and industrial | Owner-occupied
Financing Receivable, Modifications [Line Items]
Recorded Investment	592,000	22,000	684,000	22,000
Term Extensions and/or Other Concessions | Total commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,534,000	331,000	4,493,000	648,000
Term Extensions and/or Other Concessions | Total commercial real estate | Investment properties
Financing Receivable, Modifications [Line Items]
Recorded Investment	256,000	0	2,215,000	0
Term Extensions and/or Other Concessions | Total commercial real estate | 1-4 family properties
Financing Receivable, Modifications [Line Items]
Recorded Investment	492,000	196,000	492,000	513,000
Term Extensions and/or Other Concessions | Total commercial real estate | Land and development
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,786,000	135,000	1,786,000	135,000
Term Extensions and/or Other Concessions | Total consumer
Financing Receivable, Modifications [Line Items]
Recorded Investment	548,000	304,000	1,056,000	579,000
Term Extensions and/or Other Concessions | Total consumer | Home equity lines
Financing Receivable, Modifications [Line Items]
Recorded Investment	148,000	0	148,000	0
Term Extensions and/or Other Concessions | Total consumer | Consumer mortgages
Financing Receivable, Modifications [Line Items]
Recorded Investment	87,000	9,000	87,000	9,000
Term Extensions and/or Other Concessions | Total consumer | Credit cards
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Term Extensions and/or Other Concessions | Total consumer | Other consumer loans
Financing Receivable, Modifications [Line Items]
Recorded Investment	$ 313,000	$ 295,000	$ 821,000	$ 570,000

Other Comprehensive Income (L50

Other Comprehensive Income (Loss) (Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance			$ 2,961,566	$ 2,927,924
Other comprehensive income (loss), Net of Tax Amount	$ (17,943)	$ 6,886	(63,495)	7,794
Balance	3,167,694	2,997,947	3,167,694	2,997,947
Total
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	(107,777)	(54,751)	(54,754)	(55,659)
Other comprehensive income (loss) before reclassifications	(18,878)	6,857	(64,409)	12,453
Amounts reclassified from accumulated other comprehensive income (loss)	935	29	914	(4,659)
Other comprehensive income (loss), Net of Tax Amount	(17,943)	6,886	(63,495)	7,794
Reclassification from adoption of ASU 2018-02			(7,588)
Cumulative-effect adjustment from adoption of ASU 2016-01			117
Balance	(125,720)	(47,865)	(125,720)	(47,865)
Net unrealized gains (losses) on cash flow hedges
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	(12,137)	(12,177)	(12,137)	(12,217)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	40	0	80
Other comprehensive income (loss), Net of Tax Amount	0	40	0	80
Reclassification from adoption of ASU 2018-02			0
Cumulative-effect adjustment from adoption of ASU 2016-01			0
Balance	(12,137)	(12,137)	(12,137)	(12,137)
Net unrealized gains (losses) on investment securities available for sale
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	(96,647)	(43,444)	(43,470)	(44,324)
Other comprehensive income (loss) before reclassifications	(18,878)	6,857	(64,409)	12,453
Amounts reclassified from accumulated other comprehensive income (loss)	960	1	960	(4,715)
Other comprehensive income (loss), Net of Tax Amount	(17,918)	6,858	(63,449)	7,738
Reclassification from adoption of ASU 2018-02			(7,763)
Cumulative-effect adjustment from adoption of ASU 2016-01			117
Balance	(114,565)	(36,586)	(114,565)	(36,586)
Post-retirement unfunded health benefit
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	1,007	870	853	882
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(25)	(12)	(46)	(24)
Other comprehensive income (loss), Net of Tax Amount	(25)	(12)	(46)	(24)
Reclassification from adoption of ASU 2018-02			175
Cumulative-effect adjustment from adoption of ASU 2016-01			0
Balance	$ 982	$ 858	$ 982	$ 858

Other Comprehensive Income (L51

Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (125,720)	$ (54,754)
Net unrealized gains (losses) on cash flow hedges | Valuation Allowance of Deferred Tax Assets
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,100)
Net unrealized gains (losses) on investment securities available for sale | Valuation Allowance of Deferred Tax Assets
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (13,300)

Other Comprehensive Income (L52

Other Comprehensive Income (Loss) (Reclassifications out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (45,257)	$ (34,413)	$ (84,107)	$ (66,887)
Income tax (expense) benefit	(30,936)	(41,788)	(61,146)	(75,635)
Investment securities gains, net	(1,296)	(1)	(1,296)	7,667
Salaries and other personnel expense	(111,863)	(105,213)	(225,583)	(212,404)
Net income available to common shareholders	108,622	73,444	209,229	142,742
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net unrealized gains (losses) on cash flow hedges:
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	0	(65)	0	(130)
Income tax (expense) benefit	0	25	0	50
Net income available to common shareholders	0	(40)	0	(80)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net unrealized gains (losses) on investment securities available for sale
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	336	0	336	(2,952)
Investment securities gains, net	(1,296)	(1)	(1,296)	7,667
Net income available to common shareholders	(960)	(1)	(960)	4,715
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Post-retirement unfunded health benefit
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	(9)	(8)	(22)	(16)
Salaries and other personnel expense	34	20	68	40
Net income available to common shareholders	$ 25	$ 12	$ 46	$ 24

Fair Value Accounting (Financia

Fair Value Accounting (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 21,551
Investment securities available for sale	3,929,962	$ 3,987,069
Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	107,944	120,440
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,116,448	1,111,999
State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	115	180
Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	17,043	20,391
U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	120,633	82,674
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,526,845	2,640,523
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	906	522
Investment securities available for sale	120,633	85,836
Private equity investments	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	20,645	3,298
Investment securities available for sale	3,807,472	3,899,298
Private equity investments	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	11,336	11,722
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	1,857	1,935
Private equity investments	12,678	15,771
GGL/SBA loans servicing asset	4,186	4,101
Derivative assets	0	0
Fair Value, Measurements, Recurring Basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		3,820
Mortgage loans held for sale	53,673	48,024
Investment securities available for sale	3,929,962	3,987,069
Private equity investments	12,678	15,771
Mutual funds held in Rabbi Trusts	13,638	14,140
GGL/SBA loans servicing asset	4,186	4,101
Derivative assets	11,336	11,722
Trading account liabilities	12,328	1,000
Earnout liability	11,348	11,348
Derivative liabilities	25,494	17,097
Fair Value, Measurements, Recurring Basis | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	248	129
Fair Value, Measurements, Recurring Basis | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	906	522
Fair Value, Measurements, Recurring Basis | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	17,164
Investment securities available for sale	40,934	10,862
Fair Value, Measurements, Recurring Basis | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	577	3,002
Investment securities available for sale	107,944	120,440
Fair Value, Measurements, Recurring Basis | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	409	296
Investment securities available for sale	1,116,448	1,111,999
Fair Value, Measurements, Recurring Basis | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,495
Investment securities available for sale	115	180
Fair Value, Measurements, Recurring Basis | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	17,043	20,391
Fair Value, Measurements, Recurring Basis | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	120,633	82,674
Fair Value, Measurements, Recurring Basis | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,526,845	2,640,523
Fair Value, Measurements, Recurring Basis | Mutual funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities	3,124
Fair Value, Measurements, Recurring Basis | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	10,034	10,786
Derivative liabilities	19,303	12,638
Fair Value, Measurements, Recurring Basis | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,302	936
Fair Value, Measurements, Recurring Basis | Visa derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	5,943	4,330
Fair Value, Measurements, Recurring Basis | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	906	522
Mortgage loans held for sale	0	0
Investment securities available for sale	120,633	85,836
Private equity investments	0	0
Mutual funds held in Rabbi Trusts	13,638	14,140
GGL/SBA loans servicing asset	0	0
Derivative assets	0	0
Trading account liabilities	0	0
Earnout liability	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	906	522
Fair Value, Measurements, Recurring Basis | Level 1 | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	3,162
Fair Value, Measurements, Recurring Basis | Level 1 | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	120,633	82,674
Fair Value, Measurements, Recurring Basis | Level 1 | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Mutual funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities	3,124
Fair Value, Measurements, Recurring Basis | Level 1 | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Visa derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	20,645	3,298
Mortgage loans held for sale	53,673	48,024
Investment securities available for sale	3,807,472	3,899,298
Private equity investments	0	0
Mutual funds held in Rabbi Trusts	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	11,336	11,722
Trading account liabilities	12,328	1,000
Earnout liability	0	0
Derivative liabilities	19,551	12,767
Fair Value, Measurements, Recurring Basis | Level 2 | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	248	129
Fair Value, Measurements, Recurring Basis | Level 2 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Measurements, Recurring Basis | Level 2 | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	17,164
Investment securities available for sale	40,934	10,862
Fair Value, Measurements, Recurring Basis | Level 2 | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	577	3,002
Investment securities available for sale	107,944	120,440
Fair Value, Measurements, Recurring Basis | Level 2 | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	409	296
Investment securities available for sale	1,116,448	1,111,999
Fair Value, Measurements, Recurring Basis | Level 2 | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,495
Investment securities available for sale	115	180
Fair Value, Measurements, Recurring Basis | Level 2 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	15,186	15,294
Fair Value, Measurements, Recurring Basis | Level 2 | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 2 | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,526,845	2,640,523
Fair Value, Measurements, Recurring Basis | Level 2 | Mutual funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities	0
Fair Value, Measurements, Recurring Basis | Level 2 | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	10,034	10,786
Derivative liabilities	19,303	12,638
Fair Value, Measurements, Recurring Basis | Level 2 | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,302	936
Fair Value, Measurements, Recurring Basis | Level 2 | Visa derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Mortgage loans held for sale	0	0
Investment securities available for sale	1,857	1,935
Private equity investments	12,678	15,771
Mutual funds held in Rabbi Trusts	0	0
GGL/SBA loans servicing asset	4,186	4,101
Derivative assets	0	0
Trading account liabilities	0	0
Earnout liability	11,348	11,348
Derivative liabilities	5,943	4,330
Fair Value, Measurements, Recurring Basis | Level 3 | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,857	1,935
Fair Value, Measurements, Recurring Basis | Level 3 | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Mutual funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities	0
Fair Value, Measurements, Recurring Basis | Level 3 | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Mortgage derivatives
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Visa derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ 5,943	$ 4,330

Fair Value Accounting (Changes

Fair Value Accounting (Changes In Fair Value Included In Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ 40	$ (249)	$ 155	$ 954
Fair value	53,673		53,673		$ 48,024
Unpaid principal balance	52,333		52,333		46,839
Fair value less aggregate unpaid principal balance	$ 1,340		$ 1,340		$ 1,185

Fair Value Accounting (Change55

Fair Value Accounting (Changes In Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Losses included in earnings attributable to the change in unrealized losses relating to assets/liabilities	$ 2,700	$ 2,100	$ 6,200	$ 2,400
Visa Derivative
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(3,974)	(5,412)	(4,330)	(5,768)
Included in earnings	(2,328)	0	(2,328)	0
Unrealized gains (losses) included in other comprehensive income	0	0	0	0
Additions	0	0	0	0
Settlements	359		715
Sales and settlements		359		715
Transfer from amortization method to fair value				0
Measurement period adjustments related to Global One acquisition		0		0
Ending balance	(5,943)	(5,053)	(5,943)	(5,053)
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	(2,328)	0	(2,328)	0
Earnout Liabilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(11,348)	(11,421)	(11,348)	(14,000)
Included in earnings	0	(1,707)	0	(1,707)
Unrealized gains (losses) included in other comprehensive income	0	0	0	0
Additions	0	0	0	0
Settlements	0		0
Sales and settlements		0		0
Transfer from amortization method to fair value				0
Measurement period adjustments related to Global One acquisition		(813)		1,766
Ending balance	(11,348)	(13,941)	(11,348)	(13,941)
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	(1,707)	0	(1,707)
GGL / SBA Loans Servicing Asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	3,971	4,178	4,101	0
Included in earnings	(312)	(376)	(734)	(694)
Unrealized gains (losses) included in other comprehensive income	0	0	0	0
Additions	527	495	819	539
Settlements	0		0
Sales and settlements		0		0
Transfer from amortization method to fair value				4,452
Measurement period adjustments related to Global One acquisition		0		0
Ending balance	4,186	4,297	4,186	4,297
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	(312)	(376)	(734)	(694)
Investment Securities Available for Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,852	1,851	1,935	1,796
Included in earnings	0	0	0	0
Unrealized gains (losses) included in other comprehensive income	5	76	(78)	131
Additions	0	0	0	0
Settlements	0		0
Sales and settlements		0		0
Transfer from amortization method to fair value				0
Measurement period adjustments related to Global One acquisition		0		0
Ending balance	1,857	1,927	1,857	1,927
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	0	0	0
Private Equity Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	12,715	23,679	15,771	25,493
Included in earnings	(37)	(1,352)	(3,093)	(3,166)
Unrealized gains (losses) included in other comprehensive income	0	0	0
Additions	0	0	0	0
Settlements	0		0
Sales and settlements		(6,629)		(6,629)
Transfer from amortization method to fair value				0
Measurement period adjustments related to Global One acquisition		0		0
Ending balance	12,678	15,698	12,678	15,698
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	$ (37)	$ 0	$ (3,093)	$ 0

Fair Value Accounting (Assets A

Fair Value Accounting (Assets And Liabilities Measured At Fair Value On A Non-Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 189,025	$ 200,286
Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	6,300	3,800
Fair Value, Measurements, Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	12,820	3,603
Other loans held for sale	0	10,197
Other real estate	0	3,363
Other assets held for sale	695	5,334
Fair Value, Measurements, Nonrecurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other loans held for sale	0	0
Other real estate	0	0
Other assets held for sale	0	0
Fair Value, Measurements, Nonrecurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other loans held for sale	0	0
Other real estate	0	0
Other assets held for sale	0	0
Fair Value, Measurements, Nonrecurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	12,820	3,603
Other loans held for sale	0	10,197
Other real estate	0	3,363
Other assets held for sale	$ 695	$ 5,334

Fair Value Accounting (Assets M

Fair Value Accounting (Assets Measured at Fair Value on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring Basis - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 6,828	$ 5,776	$ 7,548	$ 5,808
Other loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	0	0	0	3,519
Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	0	280	0	518
Other assets held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 499	$ 0	$ 499	$ 238

Fair Value Accounting (Fair Val

Fair Value Accounting (Fair Value Inputs, Assets, Quantitative Information) (Details) - Level 3 - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Measurements, Recurring Basis | Visa Derivative | Discounted cash flow analysis | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Estimated future monthly fees payable to the derivative counterparty, period	1 year	1 year
Fair Value, Measurements, Recurring Basis | Visa Derivative | Discounted cash flow analysis | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Estimated future monthly fees payable to the derivative counterparty, period	3 years	4 years
Fair Value, Measurements, Recurring Basis | Earnout Liabilities
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Liabilities, fair value, nonrecurring	$ 11,348	$ 11,348
Fair Value, Measurements, Recurring Basis | Visa derivative
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Liabilities, fair value, nonrecurring	5,943	4,330
Fair Value, Measurements, Recurring Basis | Trust preferred securities
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value disclosure	$ 1,857	$ 1,935
Fair Value, Measurements, Recurring Basis | Trust preferred securities | Discounted cash flow analysis
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Credit spread embedded in discount rate	4.38%	3.98%
Fair Value, Measurements, Recurring Basis | Private equity investments | Individual Analysis of Each Investee Company
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value disclosure	$ 12,678	$ 15,771
Fair Value, Measurements, Recurring Basis | GGL / SBA Loans Servicing Asset
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value disclosure	$ 4,186	$ 4,101
Fair Value, Measurements, Recurring Basis | GGL / SBA Loans Servicing Asset | Discounted cash flow analysis
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	13.40%	13.16%
Prepayment speeds	8.64%	7.50%
Fair Value, Measurements, Nonrecurring Basis | Collateral dependent impaired loans | Third-party appraised value of collateral less estimated selling costs | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value	0.00%	0.00%
Estimated selling costs	0.00%	0.00%
Fair Value, Measurements, Nonrecurring Basis | Collateral dependent impaired loans | Third-party appraised value of collateral less estimated selling costs | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value	68.00%	50.00%
Estimated selling costs	10.00%	10.00%
Fair Value, Measurements, Nonrecurring Basis | Collateral dependent impaired loans | Third-party appraised value of collateral less estimated selling costs | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value	38.00%	15.00%
Estimated selling costs	7.00%	7.00%
Fair Value, Measurements, Nonrecurring Basis | Other loans held for sale | Third-party appraised value of collateral less estimated selling costs | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value		5.00%
Estimated selling costs		0.00%
Fair Value, Measurements, Nonrecurring Basis | Other loans held for sale | Third-party appraised value of collateral less estimated selling costs | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value		99.00%
Estimated selling costs		10.00%
Fair Value, Measurements, Nonrecurring Basis | Other loans held for sale | Third-party appraised value of collateral less estimated selling costs | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value		54.00%
Estimated selling costs		2.00%
Fair Value, Measurements, Nonrecurring Basis | Other real estate | Third-party appraised value of collateral less estimated selling costs | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value		0.00%
Estimated selling costs		0.00%
Fair Value, Measurements, Nonrecurring Basis | Other real estate | Third-party appraised value of collateral less estimated selling costs | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value		85.00%
Estimated selling costs		10.00%
Fair Value, Measurements, Nonrecurring Basis | Other real estate | Third-party appraised value of collateral less estimated selling costs | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value		35.00%
Estimated selling costs		7.00%
Fair Value, Measurements, Nonrecurring Basis | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value	27.00%	21.00%
Estimated selling costs	0.00%	0.00%
Fair Value, Measurements, Nonrecurring Basis | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value	43.00%	52.00%
Estimated selling costs	10.00%	10.00%
Fair Value, Measurements, Nonrecurring Basis | Other assets held for sale | Third-party appraised value less estimated selling costs or BOV | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount to appraised value	42.00%	25.00%
Estimated selling costs	7.00%	7.00%

Fair Value Accounting (Carrying

Fair Value Accounting (Carrying And Estimated Fair Values Of Financial Instruments Carried On Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financial assets
Trading account assets	$ 21,551
Mortgage loans held for sale	53,673	$ 48,024
Investment securities available for sale	3,929,962	3,987,069
Loans, net	24,882,331	24,538,196
Financial liabilities
Non-interest bearing deposits	7,630,491	7,686,339
Total deposits	26,442,688	26,147,900
Federal funds purchased, other short-term borrowings and other short-term liabilities	207,580	161,190
Long-term debt	1,656,647	1,706,138
Level 1
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	1,091,788	932,933
Trading account assets	906	522
Mortgage loans held for sale	0	0
Other loans held for sale	0	0
Investment securities available for sale	120,633	85,836
Private equity investments	0	0
Mutual funds	3,124
Mutual funds held in rabbi trusts	13,638	14,140
Loans, net	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	0	0
Financial liabilities
Trading account liabilities	0	0
Non-interest bearing deposits	0	0
Non-time interest bearing deposits	0	0
Time deposits	0	0
Total deposits	0	0
Federal funds purchased, other short-term borrowings and other short-term liabilities	207,580	161,190
Long-term debt	0	0
Earnout liabilities	0	0
Derivative liability positions	0	0
Level 2
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	0	0
Trading account assets	20,645	3,298
Mortgage loans held for sale	53,673	48,024
Other loans held for sale	0	0
Investment securities available for sale	3,807,472	3,899,298
Private equity investments	0	0
Mutual funds	0
Mutual funds held in rabbi trusts	0	0
Loans, net	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	11,336	11,722
Financial liabilities
Trading account liabilities	12,328	1,000
Non-interest bearing deposits	7,630,491	7,686,339
Non-time interest bearing deposits	13,958,048	13,941,814
Time deposits	4,826,356	4,523,661
Total deposits	26,414,895	26,151,814
Federal funds purchased, other short-term borrowings and other short-term liabilities	0	0
Long-term debt	1,658,790	1,721,814
Earnout liabilities	0	0
Derivative liability positions	19,551	12,767
Level 3
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	0	0
Trading account assets	0	0
Mortgage loans held for sale	0	0
Other loans held for sale	2,733	11,356
Investment securities available for sale	1,857	1,935
Private equity investments	12,678	15,771
Mutual funds	0
Mutual funds held in rabbi trusts	0	0
Loans, net	24,732,689	24,507,141
GGL/SBA loans servicing asset	4,186	4,101
Derivative assets	0	0
Financial liabilities
Trading account liabilities	0	0
Non-interest bearing deposits	0	0
Non-time interest bearing deposits	0	0
Time deposits	0	0
Total deposits	0	0
Federal funds purchased, other short-term borrowings and other short-term liabilities	0	0
Long-term debt	0	0
Earnout liabilities	11,348	11,348
Derivative liability positions	5,943	4,330
Carrying Value
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	1,091,788	932,933
Trading account assets	21,551	3,820
Mortgage loans held for sale	53,673	48,024
Other loans held for sale	2,733	11,356
Investment securities available for sale	3,929,962	3,987,069
Private equity investments	12,678	15,771
Mutual funds	3,124
Mutual funds held in rabbi trusts	13,638	14,140
Loans, net	24,882,331	24,538,196
GGL/SBA loans servicing asset	4,186	4,101
Derivative assets	11,336	11,722
Financial liabilities
Trading account liabilities	12,328	1,000
Non-interest bearing deposits	7,630,491	7,686,339
Non-time interest bearing deposits	13,958,048	13,941,814
Time deposits	4,854,149	4,519,747
Total deposits	26,442,688	26,147,900
Federal funds purchased, other short-term borrowings and other short-term liabilities	207,580	161,190
Long-term debt	1,656,647	1,706,138
Earnout liabilities	11,348	11,348
Derivative liability positions	25,494	17,097
Fair Value
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	1,091,788	932,933
Trading account assets	21,551	3,820
Mortgage loans held for sale	53,673	48,024
Other loans held for sale	2,733	11,356
Investment securities available for sale	3,929,962	3,987,069
Private equity investments	12,678	15,771
Mutual funds	3,124
Mutual funds held in rabbi trusts	13,638	14,140
Loans, net	24,732,689	24,507,141
GGL/SBA loans servicing asset	4,186	4,101
Derivative assets	11,336	11,722
Financial liabilities
Trading account liabilities	12,328	1,000
Non-interest bearing deposits	7,630,491	7,686,339
Non-time interest bearing deposits	13,958,048	13,941,814
Time deposits	4,826,356	4,523,661
Total deposits	26,414,895	26,151,814
Federal funds purchased, other short-term borrowings and other short-term liabilities	207,580	161,190
Long-term debt	1,658,790	1,721,814
Earnout liabilities	11,348	11,348
Derivative liability positions	$ 25,494	$ 17,097

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 26, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative, fair value	$ 5,900,000			$ 4,300,000
Valuation adjustment	2,300,000
Loss on sale of outstanding commitments	(119,000)	$ (1,700,000)
Collateral requirements	30,600,000			43,800,000
Variation margin, amount reducing derivative asset	8,900,000			1,500,000
Visa derivative
Derivative [Line Items]
Escrow Deposit			$ 600,000,000
Fixed Rate Residential Mortgage
Derivative [Line Items]
Commitments to fund fixed-rate mortgage loans	69,700,000			49,300,000
Unrealized gain (loss) on fair value of fixed-rate mortgage loans to customers	(366,000)	$ (416,000)
Sale of outstanding commitments	86,000,000			72,500,000
Interest Rate Swap
Derivative [Line Items]
Notional amount of interest rate swap contracts	1,670,000,000
Increase in derivative, notional amount	$ 201,400,000
Cash Flow Hedges
Derivative [Line Items]
Derivative instruments				0
Fair Value Hedges
Derivative [Line Items]
Derivative instruments				$ 0

Derivative Instruments (Impact

Derivative Instruments (Impact Of Derivatives On Balance Sheet) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Other assets
Derivative [Line Items]
Fair value of derivative assets	$ 11,336	$ 11,722
Other assets | Interest rate contracts
Derivative [Line Items]
Fair value of derivative assets	10,034	10,786
Other assets | Mortgage derivatives
Derivative [Line Items]
Fair value of derivative assets	1,302	936
Other assets | Visa derivative
Derivative [Line Items]
Fair value of derivative assets	0	0
Other liabilities
Derivative [Line Items]
Fair value of derivative liabilities	25,494	17,097
Other liabilities | Interest rate contracts
Derivative [Line Items]
Fair value of derivative liabilities	19,303	12,638
Other liabilities | Mortgage derivatives
Derivative [Line Items]
Fair value of derivative liabilities	248	129
Other liabilities | Visa derivative
Derivative [Line Items]
Fair value of derivative liabilities	$ 5,943	$ 4,330

Derivative Instruments (Effect

Derivative Instruments (Effect Of Fair Value Hedges On Consolidated Statements Of Income) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative [Line Items]
Gain (Loss) Recognized in Income	$ (696)	$ (289)	$ 238	$ (2,074)
Interest rate contracts | Other non-interest income
Derivative [Line Items]
Gain (Loss) Recognized in Income	(16)	0	(9)	(1)
Mortgage derivatives | Mortgage banking income
Derivative [Line Items]
Gain (Loss) Recognized in Income	$ (680)	$ (289)	$ 247	$ (2,073)

Net Income Per Common Share (Sc

Net Income Per Common Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic Earnings (Loss) Per Share
Net income available to common shareholders	$ 108,622	$ 73,444	$ 209,229	$ 142,742
Weighted average common shares outstanding (in shares)	118,397	122,203	118,531	122,251
Net income per common share, basic (in dollars per share)	$ 0.92	$ 0.60	$ 1.77	$ 1.17
Diluted Earnings (Loss) Per Share
Net income available to common shareholders	$ 108,622	$ 73,444	$ 209,229	$ 142,742
Weighted average common shares outstanding (in shares)	118,397	122,203	118,531	122,251
Potentially dilutive shares from outstanding equity-based awards and Earnout Payments (in shares)	742	824	698	792
Weighted average number of diluted common shares (in shares)	119,139	123,027	119,229	123,043
Net income per common share, diluted (in dollars per share)	$ 0.91	$ 0.60	$ 1.75	$ 1.16

Net Income Per Common Share (Na

Net Income Per Common Share (Narrative) (Details) - shares shares in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Potentially dilutive shares (in shares)	2.2	2.2

Share-based Compensation (Detai

Share-based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 4,400	$ 3,500	$ 8,300	$ 6,800
Accelerated compensation cost	$ 30		$ 200
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, shares granted (in shares)			0
Options outstanding (in options)	655,000		655,000
Weighted-average exercise price, options (in dollars per share)	$ 16.92		$ 16.92
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
Other equity compensation, shares granted (in shares)			234,000
Weighted-average exercise price, shares granted during period (in dollars per share)			$ 47.67
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, shares granted (in shares)			87,000
Weighted-average exercise price, shares granted during period (in dollars per share)			$ 47.67
Market Restricted Stock Units (MRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
Other equity compensation, shares granted (in shares)			58,000
Weighted-average exercise price, shares granted during period (in dollars per share)			$ 47.67
Non-Vested Synovus Shares And Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, non-vested shares outstanding (in shares)	910,000		910,000
Weighted-average exercise price, non-vested shares outstanding (in dollars per share)	$ 40.82		$ 40.82
Minimum | Market Restricted Stock Units (MRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on shareholder return	75.00%		75.00%
Minimum | Performance Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on return on average assets (ROAA)	0.00%		0.00%
Maximum | Market Restricted Stock Units (MRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on shareholder return	125.00%		125.00%
Maximum | Performance Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on return on average assets (ROAA)	150.00%		150.00%
2013 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of authorized but unissued common stock reserved for future grants (in shares)	8,600,000		8,600,000
Equivalents authorized (in shares)	4,900,000		4,900,000
Contractual term (years)			10 years
Minimum age of plan participants			65 years
Plan participants, minimum period of service			10 years
2013 Omnibus Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share equivalents ratio (in shares)	1		1
2013 Omnibus Plan | Value Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share equivalents ratio (in shares)	2		2
2013 Omnibus Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
2013 Omnibus Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			5 years

Non-interest Income (Details)

Non-interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Non-interest income	$ 56,350	$ 51,835	$ 110,665	$ 103,321
Other revenues	17,037	16,866	29,768	37,218
Total non-interest income	73,387	68,701	140,433	140,539
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income	19,999	20,252	39,938	40,370
Fiduciary and asset management fees
Disaggregation of Revenue [Line Items]
Non-interest income	13,983	12,524	27,419	24,676
Card fees
Disaggregation of Revenue [Line Items]
Non-interest income	10,833	10,041	21,032	19,885
Brokerage revenue
Disaggregation of Revenue [Line Items]
Non-interest income	8,900	7,210	17,596	14,436
Insurance revenue
Disaggregation of Revenue [Line Items]
Non-interest income	1,879	1,060	3,092	2,364
Other fees
Disaggregation of Revenue [Line Items]
Non-interest income	756	748	1,588	1,590
Community Banking
Disaggregation of Revenue [Line Items]
Non-interest income	5,939	5,862	11,824	11,852
Other revenues	3,390	2,993	5,841	4,641
Total non-interest income	9,329	8,855	17,665	16,493
Community Banking | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income	5,724	5,644	11,404	11,415
Community Banking | Fiduciary and asset management fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Community Banking | Card fees
Disaggregation of Revenue [Line Items]
Non-interest income	215	218	420	437
Community Banking | Brokerage revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Community Banking | Insurance revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Community Banking | Other fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Corporate Banking
Disaggregation of Revenue [Line Items]
Non-interest income	453	428	985	887
Other revenues	1,848	2,758	3,581	4,376
Total non-interest income	2,301	3,186	4,566	5,263
Corporate Banking | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income	453	428	985	887
Corporate Banking | Fiduciary and asset management fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Corporate Banking | Card fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Corporate Banking | Brokerage revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Corporate Banking | Insurance revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Corporate Banking | Other fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Retail Banking
Disaggregation of Revenue [Line Items]
Non-interest income	24,188	23,842	48,163	47,478
Other revenues	1,713	1,618	3,242	3,183
Total non-interest income	25,901	25,460	51,405	50,661
Retail Banking | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income	13,096	13,533	26,518	26,970
Retail Banking | Fiduciary and asset management fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Retail Banking | Card fees
Disaggregation of Revenue [Line Items]
Non-interest income	10,618	9,823	20,612	19,448
Retail Banking | Brokerage revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Retail Banking | Insurance revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Retail Banking | Other fees
Disaggregation of Revenue [Line Items]
Non-interest income	474	486	1,033	1,060
Financial Management Services
Disaggregation of Revenue [Line Items]
Non-interest income	24,762	20,794	48,107	41,476
Other revenues	5,565	6,816	11,408	13,413
Total non-interest income	30,327	27,610	59,515	54,889
Financial Management Services | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Financial Management Services | Fiduciary and asset management fees
Disaggregation of Revenue [Line Items]
Non-interest income	13,983	12,524	27,419	24,676
Financial Management Services | Card fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Financial Management Services | Brokerage revenue
Disaggregation of Revenue [Line Items]
Non-interest income	8,900	7,210	17,596	14,436
Financial Management Services | Insurance revenue
Disaggregation of Revenue [Line Items]
Non-interest income	1,879	1,060	3,092	2,364
Financial Management Services | Other fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Non-interest income	1,008	909	1,586	1,628
Other revenues	4,521	2,681	5,696	11,605
Total non-interest income	5,529	3,590	7,282	13,233
Other | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income	726	647	1,031	1,098
Other | Fiduciary and asset management fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Other | Card fees
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Other | Brokerage revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Other | Insurance revenue
Disaggregation of Revenue [Line Items]
Non-interest income	0	0	0	0
Other | Other fees
Disaggregation of Revenue [Line Items]
Non-interest income	$ 282	$ 262	$ 555	$ 530

Commitments and Contingencies67

Commitments and Contingencies (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Contractual amount net of risk participations	$ 70,000,000	$ 77,000,000
Minimum
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	0
Maximum
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	5,000,000
Guarantee obligations
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	9,482,676,000	9,080,108,000
Maximum potential exposure for sponsored transactions	34,350,000,000	30,420,000,000
Letters of credit
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	179,860,000	153,372,000
Commitments to fund commercial and industrial loans
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	5,361,671,000	5,090,827,000
Commitments to fund commercial real estate, construction, and land development loans
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,652,834,000	1,567,583,000
Commitments under home equity lines of credit
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,179,074,000	1,137,714,000
Unused credit card lines
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	743,376,000	779,254,000
Other loan commitments
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	$ 365,861,000	$ 351,358,000

Subsequent Events (Details)

Subsequent Events (Details) $ / shares in Units, $ in Thousands	Aug. 01, 2018USD ($)$ / sharesshares	Jun. 21, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)branch$ / shares	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)branch$ / shares	Jun. 30, 2017USD ($)	Jul. 23, 2018branch$ / shares	Dec. 31, 2017$ / shares
Pending Acquisition of FCB Financial Holdings, Inc.
Common stock, par value (in dollars per share) | $ / shares				$ 1		$ 1			$ 1
Number of branches | branch				250		250
Redemption of Series C Preferred Stock
Cash dividends paid on preferred stock						$ 5,119	$ 5,119
Proceeds from issuance of stock						195,138	0
Dividends on preferred stock				$ 2,559	$ 2,559	$ 5,119	$ 5,119
Series D Preferred Stock
Redemption of Series C Preferred Stock
Proceeds from issuance of stock		$ 200,000
Subsequent Event | Series C Preferred Stock
Redemption of Series C Preferred Stock
Preferred stock, redemption price per share (in usd per share) | $ / shares	$ 25
Cash dividends paid on preferred stock	$ 2,600
Subsequent Event | Preferred Stock | Series C Preferred Stock
Redemption of Series C Preferred Stock
Stock redeemed during period (in shares) | shares	5,200,000
Stock redeemed during period	$ 130,000
Subsequent Event | FCB Financial Holdings, Inc.
Pending Acquisition of FCB Financial Holdings, Inc.
Common stock, par value (in dollars per share) | $ / shares								$ 0.001
Subsequent Event | FCB Financial Holdings, Inc.
Pending Acquisition of FCB Financial Holdings, Inc.
Number of branches | branch								50
Subsequent Event | FCB Financial Holdings, Inc. | Synovus Brand
Pending Acquisition of FCB Financial Holdings, Inc.
Common stock, par value (in dollars per share) | $ / shares								$ 1
Conversion ratio for common share								1.055
Scenario, Forecast | Subsequent Event | Preferred Stock | Series C Preferred Stock
Redemption of Series C Preferred Stock
Dividends on preferred stock			$ 4,100