Synovus Financial (SNV) 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
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		122,298,503

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 367,342	$ 367,092
Interest bearing funds with Federal Reserve Bank	985,776	829,887
Interest earning deposits with banks	18,375	17,387
Federal funds sold and securities purchased under resale agreements	71,753	69,819
Trading account assets, at fair value	7,309	5,097
Mortgage loans held for sale, at fair value	95,769	59,275
Investment securities available for sale, at fair value	3,603,153	3,587,818
Loans, net of deferred fees and costs	23,262,887	22,429,565
Allowance for loan losses	(253,817)	(252,496)
Loans, net	23,009,070	22,177,069
Premises and equipment, net	418,091	445,155
Goodwill	24,431	24,431
Other real estate	28,438	47,030
Deferred tax asset, net	395,795	511,948
Other assets	701,794	650,645
Total assets	29,727,096	28,792,653
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing deposits	7,059,059	6,732,970
Interest bearing deposits, excluding brokered deposits	15,817,596	15,434,171
Brokered deposits	1,315,348	1,075,520
Total deposits	24,192,003	23,242,661
Federal funds purchased and securities sold under repurchase agreements	195,025	177,025
Long-term debt	2,160,985	2,186,893
Other liabilities	272,424	185,878
Total liabilities	26,820,437	25,792,457
Shareholders' Equity
Series C Preferred Stock – no par value. Authorized 100,000,000 shares; 5,200,000 shares issued and outstanding at September 30, 2016 and December 31, 2015	125,980	125,980
Common stock - $1.00 par value. Authorized 342,857,143 shares; 141,066,207 issued at September 30, 2016 and 140,592,409 issued at December 31, 2015; 121,453,772 outstanding at September 30, 2016 and 129,547,032 outstanding at December 31, 2015	141,066	140,592
Additional paid-in capital	2,987,760	2,989,981
Treasury stock, at cost – 19,612,435 shares at September 30, 2016 and 11,045,377 shares at December 31, 2015	(654,014)	(401,511)
Accumulated other comprehensive income (loss)	5,165	(29,819)
Retained earnings	300,702	174,973
Total shareholders’ equity	2,906,659	3,000,196
Total liabilities and shareholders' equity	$ 29,727,096	$ 28,792,653

Consolidated Balance Sheets (u3

Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred Stock, shares authorized	100,000,000	100,000,000
Preferred Stock, shares issued	5,200,000	5,200,000
Preferred stock, shares outstanding	5,200,000	5,200,000
Common stock, par value (per share)	$ 1	$ 1
Common stock, shares authorized	342,857,143	342,857,143
Common stock, shares issued	141,066,207	140,592,409
Common stock, shares outstanding	121,453,772	129,547,032
Treasury stock, shares at cost	19,612,435	11,045,377

Consolidated Statements of Inco

Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income:
Loans, including fees	$ 237,448	$ 220,782	$ 700,340	$ 652,807
Investment securities available for sale	16,269	14,926	49,926	43,043
Trading account assets	13	34	46	258
Mortgage loans held for sale	727	662	1,966	2,060
Federal Reserve Bank balances	1,151	821	3,170	2,413
Other earning assets	946	868	2,822	2,567
Total interest income	256,554	238,093	758,270	703,148
Interest expense:
Deposits	15,858	17,227	48,072	48,859
Federal funds purchased and securities sold under repurchase agreements	58	46	154	134
Long-term debt	14,631	13,030	44,394	39,457
Total interest expense	30,547	30,303	92,620	88,450
Net interest income	226,007	207,790	665,650	614,698
Provision for loan losses	5,671	2,956	21,741	13,990
Net interest income after provision for loan losses	220,336	204,834	643,909	600,708
Non-interest income:
Service charges on deposit accounts	20,822	20,692	60,772	59,621
Fiduciary and asset management fees	11,837	11,308	34,691	34,722
Brokerage revenue	6,199	6,946	20,019	20,978
Mortgage banking income	7,329	5,965	18,755	19,960
Bankcard fees	8,269	8,334	24,988	24,910
Investment securities gains, net	59	0	126	2,710
Other fee income	5,171	5,521	15,255	15,371
Other non-interest income	8,469	8,293	24,582	23,474
Total non-interest income	68,155	67,059	199,188	201,746
Non-interest expense:
Salaries and other personnel expense	101,945	94,341	300,364	285,394
Net occupancy and equipment expense	28,120	26,937	81,480	79,650
Third-party processing expense	11,219	10,844	34,033	31,858
FDIC insurance and other regulatory fees	6,756	6,591	20,100	20,315
Professional fees	6,486	6,371	19,794	18,382
Advertising expense	5,597	5,488	15,358	11,797
Foreclosed real estate expense, net	2,725	4,503	9,998	18,350
Merger-related expense	550	0	550	0
Loss on early extinguishment of debt	0	0	4,735	0
Restructuring charges, net	1,243	69	8,225	(33)
Other operating expenses	21,230	22,763	68,079	68,908
Total non-interest expense	185,871	177,907	562,716	534,621
Income before income taxes	102,620	93,986	280,381	267,833
Income tax expense	37,375	36,058	102,148	100,149
Net income	65,245	57,928	178,233	167,684
Dividends on preferred stock	2,559	2,559	7,678	7,678
Net income available to common shareholders	$ 62,686	$ 55,369	$ 170,555	$ 160,006
Net income per common share, basic (in dollars per share)	$ 0.51	$ 0.42	$ 1.36	$ 1.20
Net income per common share, diluted (in dollars per share)	$ 0.51	$ 0.42	$ 1.36	$ 1.20
Weighted average common shares outstanding, basic (in shares)	122,924	131,516	125,076	133,120
Weighted average common shares outstanding, diluted (in shares)	123,604	132,297	125,712	133,876

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income, Before-tax Amount	$ 102,620	$ 93,986	$ 280,381	$ 267,833
Net income, Tax (Expense) Benefit	(37,375)	(36,058)	(102,148)	(100,149)
Net income	65,245	57,928	178,233	167,684
Reclassification adjustment for losses realized in net income, Before-tax Amount	65	112	402	336
Reclassification adjustment for losses realized in net income, Tax (Expense) Benefit	(25)	(43)	(155)	(130)
Reclassification adjustment for losses realized in net income, Net of Tax Amount	40	69	247	206
Net unrealized gains (losses) on investment securities available for sale:
Reclassification adjustment for net gains realized in net income, Before-tax Amount	(59)	0	(126)	(2,710)
Net unrealized gains (losses) arising during the period, Before-tax Amount	(9,567)	26,374	56,648	12,907
Net unrealized gain (losses), Before-tax Amount	(9,626)	26,374	56,522	10,197
Net unrealized gains (losses) on investment securities available for sale: Tax (Expense) Benefit
Reclassification adjustment for net gains realized in net income, Tax (Expense) Benefit	23	0	49	1,043
Net unrealized gains (losses) arising during the period, Tax (Expense) Benefit	3,672	(10,154)	(21,821)	(4,966)
Net unrealized gains (losses), Tax (Expense) Benefit	3,695	(10,154)	(21,772)	(3,923)
Net unrealized gains (losses) on investment securities available for sale: Net of Tax Amount
Reclassification adjustment for net gains realized in net income, Net of Tax Amount	(36)	0	(77)	(1,667)
Net unrealized gains (losses) arising during the period, Net of Tax Amount	(5,895)	16,220	34,827	7,941
Net unrealized gains (losses), Net of Tax Amount	(5,931)	16,220	34,750	6,274
Post-retirement unfunded health benefit: Before-tax Amount
Reclassification adjustment for gains realized in net income, Before-tax Amount	(20)	(94)	(124)	(178)
Actuarial gains arising during the period, Before-tax Amount	102	0	102	236
Net unrealized (realized) gains, Before-tax Amount	82	(94)	(22)	58
Post-retirement unfunded health benefit: Tax (Expense) Benefit
Reclassification adjustment for gains realized in net income, Tax (Expense) Benefit	8	36	48	68
Actuarial gains arising during the period, Tax (Expense) Benefit	(39)	0	(39)	(93)
Net unrealized (realized) gains, Tax (Expense) Benefit	(31)	36	9	(25)
Post-retirement unfunded health benefit: Net of Tax Amount
Reclassification adjustment for gains realized in net income, Net of Tax Amount	(12)	(58)	(76)	(110)
Actuarial gains arising during the period, Net of Tax Amount	63	0	63	143
Net unrealized (realized) gains, Net of Tax Amount	51	(58)	(13)	33
Other comprehensive income (loss), Before-tax Amount	(9,479)	26,392	56,902	10,591
Other comprehensive income (loss), Tax (Expense) Benefit	3,639	(10,161)	(21,918)	(4,078)
Other comprehensive income (loss), Net of Tax Amount	(5,840)	16,231	34,984	6,513
Comprehensive income, Net of Tax Amount	$ 59,405	$ 74,159	$ 213,217	$ 174,197

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (unaudited) - USD ($) $ in Thousands	Total	Preferred Stock [Member]Series C Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2014	$ 3,041,270	$ 125,980	$ 139,950	$ 2,960,825	$ (187,774)	$ (12,605)	$ 14,894
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	167,684						167,684
Other comprehensive income, net of income taxes	6,513					6,513
Cash dividends declared on common stock	(39,736)						(39,736)
Cash dividends paid on Series C Preferred Stock	(7,678)						(7,678)
Repurchases and completion of ASR agreement to repurchase shares of common stock	(162,138)			14,516	(176,654)
Restricted share unit activity	(4,461)		282	(4,376)			(367)
Stock options exercised	4,897		294	4,603
Share-based compensation net tax benefit	1,303			1,303
Share-based compensation expense	9,462			9,462
Balance at Sep. 30, 2015	3,017,116	125,980	140,526	2,986,333	(364,428)	(6,092)	134,797
Balance at Dec. 31, 2015	3,000,196	125,980	140,592	2,989,981	(401,511)	(29,819)	174,973
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	178,233						178,233
Other comprehensive income, net of income taxes	34,984					34,984
Cash dividends declared on common stock	(44,737)						(44,737)
Cash dividends paid on Series C Preferred Stock	(7,678)						(7,678)
Repurchases and completion of ASR agreement to repurchase shares of common stock	(263,084)			(10,581)	(252,503)
Restricted share unit activity	(4,648)		301	(4,860)			(89)
Stock options exercised	2,981		173	2,808
Share-based compensation net tax benefit	199			199
Share-based compensation expense	10,213			10,213
Balance at Sep. 30, 2016	$ 2,906,659	$ 125,980	$ 141,066	$ 2,987,760	$ (654,014)	$ 5,165	$ 300,702

Consolidated Statements of Cha7

Consolidated Statements of Changes in Equity (unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock, per share	$ 0.36	$ 0.30

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities
Net income	$ 178,233	$ 167,684
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	21,741	13,990
Depreciation, amortization, and accretion, net	43,615	42,725
Deferred income tax expense	94,436	93,198
(Increase) decrease in trading account assets	(2,212)	8,019
Originations of mortgage loans held for sale	(512,572)	(656,987)
Proceeds from sales of mortgage loans held for sale	486,690	658,787
Gain on sales of mortgage loans held for sale, net	(10,828)	(12,531)
Increase in other assets	(38,050)	(9,874)
Increase (decrease) in other liabilities	37,068	(11,679)
Investment securities gains, net	(126)	(2,710)
Losses and write-downs on other real estate, net	8,194	14,864
Losses and write-downs on other assets held for sale, net	7,205	1,043
Loss on early extinguishment of debt	4,735	0
Share-based compensation expense	10,213	9,462
Net cash provided by operating activities	328,342	315,991
Investing Activities
Net increase in interest earning deposits with banks	(988)	(9,360)
Net (increase) decrease in federal funds sold and securities purchased under resale agreements	(1,934)	3,378
Net increase in interest bearing funds with Federal Reserve Bank	(155,889)	(116,278)
Proceeds from maturities and principal collections of investment securities available for sale	711,882	517,077
Proceeds from sales of investment securities available for sale	596,824	82,156
Purchases of investment securities available for sale	(1,233,236)	(1,048,048)
Proceeds from sales of loans and principal repayments on other loans held for sale	8,433	28,045
Proceeds from sales of loans and principal repayments on other loans held for sale	25,415	30,124
Net increase in loans	(879,200)	(839,971)
Purchases of BOLI policies	0	(45,000)
Net increase in premises and equipment	(24,491)	(21,667)
Proceeds from sales of other assets held for sale	5,673	2,304
Net cash used in investing activities	(947,511)	(1,417,240)
Financing Activities
Net increase in demand and savings deposits	1,054,389	1,500,506
Net decrease in certificates of deposit	(105,698)	(254,793)
Net increase in federal funds purchased and securities sold under repurchase agreements	18,000	8,559
Repayments on long-term debt	(1,730,106)	(525,000)
Proceeds from issuance of long-term debt	1,700,000	425,000
Dividends paid to common shareholders	(44,737)	(39,736)
Dividends paid to preferred shareholders	(7,678)	(7,678)
Stock options exercised	2,981	4,897
Repurchases and agreements to repurchase shares of common stock	(263,084)	(162,138)
Restricted stock activity	(4,648)	(4,461)
Net cash provided by financing activities	619,419	945,156
Increase (decrease) in cash and cash equivalents	250	(156,093)
Cash and cash equivalents at beginning of period	367,092	485,489
Cash and cash equivalents at end of period	367,342	329,396
Supplemental Cash Flow Information
Income tax payments, net	6,828	9,109
Interest paid	93,479	86,451
Non-cash Activities
Premises and equipment transferred to other assets held for sale	23,667	1,477
Loans foreclosed and transferred to other real estate	15,017	23,862
Loans transferred to other assets held for sale at fair value	10,482	0
Securities purchased during the period but settled after period-end	$ 49,479	$ 0

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
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, member FDIC, 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, and international banking. Synovus also provides mortgage services, financial planning, and investment advisory services through its wholly-owned subsidiaries, Synovus Mortgage, Synovus Trust, and Synovus Securities, as well as its GLOBALT and Creative Financial Group divisions. These specialized offerings, combined with traditional banking products and services, make Synovus Bank a great choice for retail and commercial customers. Synovus Bank's 28 locally-branded bank divisions are positioned in some of the best markets in the Southeast, with 250 branches and 332 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' 2015 Form 10-K. There have been no significant changes to the accounting policies as disclosed in Synovus' 2015 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, the fair value of private equity investments, and contingent liabilities related to legal matters. Cash and Cash Equivalents Cash and cash equivalents consist of cash and due from banks. At September 30, 2016 and December 31, 2015, $33 thousand and $ 100 thousand , respectively, of the due from banks balance was restricted as to withdrawal. Short-term Investments Short-term investments consist of interest bearing funds with the Federal Reserve Bank, interest earning deposits with banks, and Federal funds sold and securities purchased under resale agreements. At September 30, 2016 and December 31, 2015 , interest bearing funds with the Federal Reserve Bank included $135.1 million and $117.3 million , respectively, on deposit to meet Federal Reserve Bank requirements. Interest earning deposits with banks include $5.6 million and $2.2 million at September 30, 2016 and December 31, 2015 , respectively, which are pledged as collateral in connection with certain letters of credit. Federal funds sold include $71.0 million and $65.9 million at September 30, 2016 and December 31, 2015 , respectively, which are pledged to collateralize certain derivative financial instruments. Federal funds sold and securities purchased under resale agreements, and Federal funds purchased and securities sold under repurchase agreements, generally mature in one day. Recently Adopted Accounting Standards Updates During 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis , which became effective for Synovus on January 1, 2016. ASU 2015-02 was issued by the FASB to modify the analysis that companies must perform in order to determine whether a legal entity should be consolidated. ASU 2015-02 simplifies current consolidation rules by reducing the number of consolidation models; placing more emphasis on risk of loss when determining a controlling financial interest; reducing the frequency of the application of related-party guidance when determining a controlling financial interest in a VIE; and changing consolidation conclusions for public and private companies in several industries that typically make use of limited partnerships or VIEs. Adoption of ASU 2015-02 did not have an impact on Synovus’ consolidated financial statements. Reclassifications Prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current periods' presentation. Subsequent Events Synovus has evaluated for consideration, or disclosure, all transactions, events, and circumstances, subsequent to the date of the consolidated balance sheet and through the date the accompanying unaudited interim consolidated financial statements were issued, and has reflected, or disclosed, those items deemed appropriate within the unaudited interim consolidated financial statements. On October 1, 2016, Synovus completed its acquisition of Entaire Global Companies, Inc. ("Entaire"), an Atlanta-based specialty financial services company. Under the terms of the agreement, Synovus acquired Entaire for an up-front payment of $30.0 million in common stock and cash, with potential additional payments to Entaire's stockholders over the next three to five years based on Entaire's earnings. As of October 1, 2016, Entaire had approximately $370 million in total assets, including loans totaling approximately $357 million .

Share Repurchase Programs

Share Repurchase Programs	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Share Repurchase Program	Note 2 - Share Repurchase Program During the third quarter of 2015, Synovus' Board of Directors authorized a $300 million share repurchase program to be completed over the next 15 months. Effective September 29, 2016, Synovus entered into an ASR agreement to repurchase the remaining $50.0 million of Synovus common stock under the share repurchase program and repurchased 1.2 million shares at an initial average price of $31.87 . As of September 30, 2016 , Synovus had repurchased a total of $289.4 million or 9.7 million shares at an average price of $29.78 per share under the $300 million share repurchase program. The remaining shares will be repurchased upon settlement of the ASR agreement on or before December 28, 2016. Share repurchases under the program by quarter are as follows: third quarter of 2016 - $80.9 million ( 2.6 million shares), second quarter of 2016 - $60.5 million ( 2.0 million shares), first quarter of 2016 - $110.9 million ( 3.9 million shares), and fourth quarter of 2015 - $37.1 million ( 1.2 million shares).

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2016
Investments [Abstract]
Investment Securities	Note 3 - Investment Securities The amortized cost, gross unrealized gains and losses, and estimated fair values of investment securities available for sale at September 30, 2016 and December 31, 2015 are summarized below. September 30, 2016 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 73,758 754 — 74,512 U.S. Government agency securities 12,728 415 — 13,143 Securities issued by U.S. Government sponsored enterprises — — — — Mortgage-backed securities issued by U.S. Government agencies 181,772 3,481 (102 ) 185,151 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,391,778 31,624 (746 ) 2,422,656 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 868,723 8,108 (722 ) 876,109 State and municipal securities 2,870 30 (1 ) 2,899 Equity securities 2,755 5,892 — 8,647 Other investments 20,227 91 (282 ) 20,036 Total investment securities available for sale $ 3,554,611 50,395 (1,853 ) 3,603,153 December 31, 2015 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 43,125 232 — 43,357 U.S. Government agency securities 13,087 536 — 13,623 Securities issued by U.S. Government sponsored enterprises 126,520 389 — 126,909 Mortgage-backed securities issued by U.S. Government agencies 209,785 1,340 (1,121 ) 210,004 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,645,107 7,874 (22,562 ) 2,630,419 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 530,426 2,396 (3,225 ) 529,597 State and municipal securities 4,343 92 (1 ) 4,434 Equity securities 3,228 6,444 — 9,672 Other investments 20,177 — (374 ) 19,803 Total investment securities available for sale $ 3,595,798 19,303 (27,283 ) 3,587,818 At September 30, 2016 and December 31, 2015 , investment securities with a carrying value of $2.01 billion and $2.43 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 September 30, 2016 and December 31, 2015 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 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 September 30, 2016 , Synovus had sixteen investment securities in a loss position for less than twelve months and four 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 September 30, 2016 and December 31, 2015 , are presented below. September 30, 2016 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 Mortgage-backed securities issued by U.S. Government agencies 8,058 61 3,961 41 12,019 102 Mortgage-backed securities issued by U.S. Government sponsored enterprises 351,518 746 — — 351,518 746 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 197,340 460 26,566 262 223,906 722 State and municipal securities — — 54 1 54 1 Other investments — — 4,945 282 4,945 282 Total $ 556,916 1,267 35,526 586 592,442 1,853 December 31, 2015 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 Mortgage-backed securities issued by U.S. Government agencies 122,626 639 18,435 482 141,061 1,121 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1,656,194 12,874 489,971 9,688 2,146,165 22,562 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 196,811 963 72,366 2,262 269,177 3,225 State and municipal securities — — 50 1 50 1 Other investments 14,985 15 4,818 359 19,803 374 Total $ 1,990,616 14,491 585,640 12,792 2,576,256 27,283 The amortized cost and fair value by contractual maturity of investment securities available for sale at September 30, 2016 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 September 30, 2016 (in thousands) Within One Year 1 to 5 Years 5 to 10 Years More Than 10 Years No Stated Maturity Total Amortized Cost U.S. Treasury securities $ 18,770 54,988 — — — 73,758 U.S. Government agency securities 999 5,929 5,800 — — 12,728 Securities issued by U.S. Government sponsored enterprises — — — — — — Mortgage-backed securities issued by U.S. Government agencies — — 15,175 166,597 — 181,772 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 334 947,156 1,444,288 — 2,391,778 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 868,723 — 868,723 State and municipal securities 164 240 — 2,466 — 2,870 Equity securities — — — 2,755 2,755 Other investments — — 15,000 2,000 3,227 20,227 Total amortized cost $ 19,933 61,491 983,131 2,484,074 5,982 3,554,611 Fair Value U.S. Treasury securities $ 18,770 55,742 — — — 74,512 U.S. Government agency securities 1,034 6,071 6,038 — — 13,143 Securities issued by U.S. Government sponsored enterprises — — — — — — Mortgage-backed securities issued by U.S. Government agencies — — 15,568 169,583 — 185,151 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 345 957,800 1,464,511 — 2,422,656 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 876,109 — 876,109 State and municipal securities 164 242 — 2,493 — 2,899 Equity securities — — — — 8,647 8,647 Other investments — — 15,091 1,774 3,171 20,036 Total fair value $ 19,968 62,400 994,497 2,514,470 11,818 3,603,153 Proceeds from sales, gross gains, and gross losses on sales of securities available for sale for the nine and three months ended September 30, 2016 and 2015 are presented below. The specific identification method is used to reclassify gains and losses out of other comprehensive income at the time of sale. Nine Months Ended September 30, Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Proceeds from sales of investment securities available for sale $ 596,824 82,156 $ 353,215 — Gross realized gains 2,590 2,710 1,635 — Gross realized losses (2,464 ) — (1,576 ) — Investment securities gains, net $ 126 2,710 $ 59 —

Restructuring Charges

Restructuring Charges	9 Months Ended
	Sep. 30, 2016
Restructuring Charges [Abstract]
Restructuring Charges	Note 4 - Restructuring Charges For the nine and three months ended September 30, 2016 and 2015 , total restructuring charges consist of the following components: Nine Months Ended September 30, Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Lease termination charges $ 6 (4 ) $ (25 ) — Asset impairment charges 8,107 229 1,240 229 Loss (gain) on sale of assets held for sale, net 13 (374 ) — (217 ) Professional fees and other charges 99 116 28 57 Total restructuring charges, net $ 8,225 (33 ) $ 1,243 69 For the three months ended September 30, 2016 , Synovus recorded restructuring charges of $1.2 million due to additional asset impairment charges of $973 thousand on properties previously identified for disposition as well as a $267 thousand impairment on a branch identified during the third quarter for closure by year-end. For the nine months ended September 30, 2016 , restructuring charges totaled $8.2 million with $4.8 million related to Synovus' continued corporate real estate optimization activities. Synovus continues to evaluate its branch network while deploying additional digital and on-line capabilities to increase convenience for customers while lowering transaction costs, and identified nine branches for closure during the nine months ended September 30, 2016 , with seven of those branches closed as of September 30, 2016. Restructuring charges associated with branch closures identified during 2016 totaled $3.3 million for the nine months ended September 30, 2016. Synovus' branch network will consist of 248 locations at year-end, which will represent a 23.2% reduction from year-end 2010. During the nine months ended September 30, 2015 , Synovus recorded net gains of $374 thousand on the sale of certain branch locations and recorded additional expense, net of $341 thousand associated primarily with 2014 branch closings. The following tables present aggregate activity within the accrual for restructuring charges for the nine and three months ended September 30, 2016 and 2015 : (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2015 $ 1,930 4,687 6,617 Accruals for efficiency initiatives — 6 6 Payments (1,702 ) (533 ) (2,235 ) Balance at September 30, 2016 $ 228 4,160 4,388 Balance at July 1, 2016 593 4,375 4,968 Accruals for efficiency initiatives — (25 ) (25 ) Payments (365 ) (190 ) (555 ) Balance at September 30, 2016 $ 228 4,160 4,388 (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2014 $ 3,291 5,539 8,830 Accruals for efficiency initiatives — (4 ) (4 ) Payments (1,259 ) (608 ) (1,867 ) Balance at September 30, 2015 $ 2,032 4,927 6,959 Balance at July 1, 2015 2,253 5,124 7,377 Accruals for efficiency initiatives — — — Payments (221 ) (197 ) (418 ) Balance at September 30, 2015 $ 2,032 4,927 6,959 All professional fees and other charges were paid in the quarters that they were incurred. No other restructuring charges resulted in payment accruals.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2016
Loans and Allowance for Loan Losses [Abstract]
Loans and Allowance for Loan Losses	Note 5 - 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 September 30, 2016 and December 31, 2015 . Current, Accruing Past Due, and Non-accrual Loans September 30, 2016 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Investment properties $ 5,957,788 2,501 293 2,794 8,884 5,969,466 1-4 family properties 1,047,830 5,355 717 6,072 17,152 1,071,054 Land acquisition 414,425 2,678 1,283 3,961 6,672 425,058 Total commercial real estate 7,420,043 10,534 2,293 12,827 32,708 7,465,578 Commercial, financial and agricultural 6,475,826 17,987 942 18,929 49,874 6,544,629 Owner-occupied 4,441,624 8,145 153 8,298 21,443 4,471,365 Total commercial and industrial 10,917,450 26,132 1,095 27,227 71,317 11,015,994 Home equity lines 1,613,264 5,283 482 5,765 19,815 1,638,844 Consumer mortgages 2,212,358 9,411 101 9,512 21,284 2,243,154 Credit cards 229,735 1,309 1,265 2,574 — 232,309 Other retail loans 686,297 3,754 122 3,876 3,031 693,204 Total retail 4,741,654 19,757 1,970 21,727 44,130 4,807,511 Total loans $ 23,079,147 56,423 5,358 61,781 148,155 23,289,083 (1 ) December 31, 2015 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Investment properties $ 5,726,307 2,284 — 2,284 23,040 5,751,631 1-4 family properties 1,105,914 6,300 103 6,403 16,839 1,129,156 Land acquisition 495,542 639 32 671 17,768 513,981 Total commercial real estate 7,327,763 9,223 135 9,358 57,647 7,394,768 Commercial, financial and agricultural 6,391,036 12,222 785 13,007 49,137 6,453,180 Owner-occupied 4,293,308 5,254 95 5,349 20,293 4,318,950 Total commercial and industrial 10,684,344 17,476 880 18,356 69,430 10,772,130 Home equity lines 1,667,552 5,882 — 5,882 16,480 1,689,914 Consumer mortgages 1,907,644 8,657 134 8,791 22,248 1,938,683 Credit cards 237,742 1,663 1,446 3,109 — 240,851 Other retail loans 418,337 2,390 26 2,416 2,565 423,318 Total retail 4,231,275 18,592 1,606 20,198 41,293 4,292,766 Total loans $ 22,243,382 45,291 2,621 47,912 168,370 22,459,664 (2 ) (1) Total before net deferred fees and costs of $26.2 million . (2) Total before net deferred fees and costs of $30.1 million . The credit quality of the loan portfolio is summarized 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, retail 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 retail loans (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 the associated senior lien with other financial institutions. Loan Portfolio Credit Exposure by Risk Grade September 30, 2016 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Investment properties $ 5,852,738 80,002 36,726 — — 5,969,466 1-4 family properties 961,369 48,024 54,619 7,042 — 1,071,054 Land acquisition 373,709 30,841 20,182 326 — 425,058 Total commercial real estate 7,187,816 158,867 111,527 7,368 — 7,465,578 Commercial, financial and agricultural 6,259,343 152,273 121,900 10,103 1,010 (3) 6,544,629 Owner-occupied 4,276,792 73,250 119,911 1,412 — 4,471,365 Total commercial and industrial 10,536,135 225,523 241,811 11,515 1,010 11,015,994 Home equity lines 1,611,366 — 22,131 2,895 2,452 (3) 1,638,844 Consumer mortgages 2,218,687 — 23,002 1,285 180 (3) 2,243,154 Credit cards 231,044 — 483 — 782 (4) 232,309 Other retail loans 689,663 — 3,429 42 70 (3) 693,204 Total retail 4,750,760 — 49,045 4,222 3,484 4,807,511 Total loans $ 22,474,711 384,390 402,383 23,105 4,494 23,289,083 (5 ) December 31, 2015 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Investment properties $ 5,560,595 114,705 76,331 — — 5,751,631 1-4 family properties 995,903 64,325 61,726 7,202 — 1,129,156 Land acquisition 436,835 46,208 30,574 364 — 513,981 Total commercial real estate 6,993,333 225,238 168,631 7,566 — 7,394,768 Commercial, financial and agricultural 6,184,179 152,189 100,658 13,330 2,824 (3) 6,453,180 Owner-occupied 4,118,631 78,490 121,272 98 459 (3) 4,318,950 Total commercial and industrial 10,302,810 230,679 221,930 13,428 3,283 10,772,130 Home equity lines 1,666,586 — 20,456 1,206 1,666 (3) 1,689,914 Consumer mortgages 1,910,649 — 26,041 1,700 293 (3) 1,938,683 Credit cards 239,405 — 480 — 966 (4) 240,851 Other retail loans 418,929 — 4,315 — 74 (3) 423,318 Total retail 4,235,569 — 51,292 2,906 2,999 4,292,766 Total loans $ 21,531,712 455,917 441,853 23,900 6,282 22,459,664 (6 ) (1) Includes $281.8 million and $303.7 million of Substandard accruing loans at September 30, 2016 and December 31, 2015 , 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 $26.2 million . (6) Total before net deferred fees and costs of $30.1 million . The following table details the changes in the allowance for loan losses by loan segment for the nine and three months ended September 30, 2016 and 2015 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Nine Months Ended September 30, 2016 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 87,133 122,989 42,374 252,496 Charge-offs (13,361 ) (17,098 ) (10,611 ) (41,070 ) Recoveries 10,927 6,122 3,601 20,650 Provision for loan losses (3,597 ) 18,875 6,463 21,741 Ending balance (1) $ 81,102 130,888 41,827 253,817 Ending balance: individually evaluated for impairment 11,066 11,474 1,724 24,264 Ending balance: collectively evaluated for impairment $ 70,036 119,414 40,103 229,553 Loans: Ending balance: total loans (1)(2) $ 7,465,578 11,015,994 4,807,511 23,289,083 Ending balance: individually evaluated for impairment 102,837 118,442 37,820 259,099 Ending balance: collectively evaluated for impairment $ 7,362,741 10,897,552 4,769,691 23,029,984 As Of and For The Nine Months Ended September 30, 2015 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 101,471 118,110 41,736 261,317 Charge-offs (12,120 ) (17,417 ) (16,535 ) (46,072 ) Recoveries 10,500 5,774 5,391 21,665 Provision for loan losses (10,845 ) 15,954 8,881 13,990 Ending balance (1) $ 89,006 122,421 39,473 250,900 Ending balance: individually evaluated for impairment 18,091 12,568 782 31,441 Ending balance: collectively evaluated for impairment $ 70,915 109,853 38,691 219,459 Loans: Ending balance: total loans (1)(3) $ 7,207,461 10,525,972 4,159,243 21,892,676 Ending balance: individually evaluated for impairment 159,582 109,904 39,858 309,344 Ending balance: collectively evaluated for impairment $ 7,047,879 10,416,068 4,119,385 21,583,332 (1) As of and for the nine months ended September 30, 2016 and 2015, 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 $26.2 million . (3) Total before net deferred fees and costs of $28.4 million . Allowance for Loan Losses and Recorded Investment in Loans As of and For The Three Months Ended September 30, 2016 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 79,359 129,633 46,084 255,076 Charge-offs (4,084 ) (6,437 ) (3,463 ) (13,984 ) Recoveries 4,237 1,780 1,037 7,054 Provision for loan losses 1,590 5,912 (1,831 ) 5,671 Ending balance (1) $ 81,102 130,888 41,827 253,817 Ending balance: individually evaluated for impairment 11,066 11,474 1,724 24,264 Ending balance: collectively evaluated for impairment $ 70,036 119,414 40,103 229,553 Loans: Ending balance: total loans (1)(2) $ 7,465,578 11,015,994 4,807,511 23,289,083 Ending balance: individually evaluated for impairment 102,837 118,442 37,820 259,099 Ending balance: collectively evaluated for impairment $ 7,362,741 10,897,552 4,769,691 23,029,984 As of and For The Three Months Ended September 30, 2015 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 90,691 123,050 40,961 254,702 Charge-offs (1,722 ) (8,342 ) (4,779 ) (14,843 ) Recoveries 4,019 2,203 1,863 8,085 Provision for loan losses (3,982 ) 5,510 1,428 2,956 Ending balance (1) $ 89,006 122,421 39,473 250,900 Ending balance: individually evaluated for impairment 18,091 12,568 782 31,441 Ending balance: collectively evaluated for impairment $ 70,915 109,853 38,691 219,459 Loans: Ending balance: total loans (1)(3) $ 7,207,461 10,525,972 4,159,243 21,892,676 Ending balance: individually evaluated for impairment 159,582 109,904 39,858 309,344 Ending balance: collectively evaluated for impairment $ 7,047,879 10,416,068 4,119,385 21,583,332 (1) As of and for the three months ended September 30, 2016 and 2015, 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 $26.2 million . (3) Total before net deferred fees and costs of $28.4 million . The tables below summarize impaired loans (including accruing TDRs) as of September 30, 2016 and December 31, 2015 . Impaired Loans (including accruing TDRs) September 30, 2016 Nine Months Ended September 30, 2016 Three Months Ended (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 Investment properties $ 996 1,032 — 6,901 — 3,158 — 1-4 family properties 1,880 5,876 — 1,328 — 1,150 — Land acquisition 920 4,360 — 3,644 — 2,070 — Total commercial real estate 3,796 11,268 — 11,873 — 6,378 — Commercial, financial and agricultural 4,015 5,406 — 5,276 — 4,351 — Owner-occupied 10,896 11,907 — 8,182 — 7,223 — Total commercial and industrial 14,911 17,313 — 13,458 — 11,574 — Home equity lines 1,051 1,051 — 1,043 — 1,051 — Consumer mortgages 814 2,065 — 814 — 814 — Credit cards — — — — — — — Other retail loans — — — — — — — Total retail 1,865 3,116 — 1,857 — 1,865 — Total impaired loans with no related allowance recorded $ 20,572 31,697 — 27,188 — 19,817 — With allowance recorded Investment properties $ 37,634 37,639 3,004 45,536 1,364 38,125 342 1-4 family properties 47,139 47,146 7,394 49,496 822 49,079 361 Land acquisition 14,268 14,268 668 17,842 349 14,095 126 Total commercial real estate 99,041 99,053 11,066 112,874 2,535 101,299 829 Commercial, financial and agricultural 47,881 50,357 9,736 53,618 863 51,820 346 Owner-occupied 55,650 55,870 1,738 51,565 1,419 53,935 492 Total commercial and industrial 103,531 106,227 11,474 105,183 2,282 105,755 838 Home equity lines 10,433 10,433 963 9,563 766 9,870 254 Consumer mortgages 20,571 20,571 610 21,259 332 20,817 108 Credit cards — — — — — — — Other retail loans 4,951 4,951 151 5,108 222 5,455 79 Total retail 35,955 35,955 1,724 35,930 1,320 36,142 441 Total impaired loans with allowance recorded $ 238,527 241,235 24,264 253,987 6,137 243,196 2,108 Total impaired loans Investment properties $ 38,630 38,671 3,004 52,437 1,364 41,283 342 1-4 family properties 49,019 53,022 7,394 50,824 822 50,229 361 Land acquisition 15,188 18,628 668 21,486 349 16,165 126 Total commercial real estate 102,837 110,321 11,066 124,747 2,535 107,677 829 Commercial, financial and agricultural 51,896 55,763 9,736 58,894 863 56,171 346 Owner-occupied 66,546 67,777 1,738 59,747 1,419 61,158 492 Total commercial and industrial 118,442 123,540 11,474 118,641 2,282 117,329 838 Home equity lines 11,484 11,484 963 10,606 766 10,921 254 Consumer mortgages 21,385 22,636 610 22,073 332 21,631 108 Credit cards — — — — — — — Other retail loans 4,951 4,951 151 5,108 222 5,455 79 Total retail 37,820 39,071 1,724 37,787 1,320 38,007 441 Total impaired loans $ 259,099 272,932 24,264 281,175 6,137 263,013 2,108 Impaired Loans (including accruing TDRs) December 31, 2015 Year Ended December 31, 2015 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded Investment properties $ 10,051 12,946 — 11,625 — 1-4 family properties 1,507 5,526 — 2,546 — Land acquisition 8,551 39,053 — 13,897 — Total commercial real estate 20,109 57,525 — 28,068 — Commercial, financial and agricultural 4,393 7,606 — 5,737 — Owner-occupied 8,762 11,210 — 14,657 — Total commercial and industrial 13,155 18,816 — 20,394 — Home equity lines 1,030 1,030 — 573 — Consumer mortgages 814 941 — 995 — Credit cards — — — — — Other retail loans — — — — — Total retail 1,844 1,971 — 1,568 — Total impaired loans with no related allowance recorded $ 35,108 78,312 — 50,030 — With allowance recorded Investment properties $ 62,305 62,305 10,070 73,211 2,131 1-4 family properties 51,376 51,376 6,184 61,690 1,618 Land acquisition 24,168 24,738 2,715 34,793 936 Total commercial real estate 137,849 138,419 18,969 169,694 4,685 Commercial, financial and agricultural 42,914 44,374 8,339 43,740 1,125 Owner-occupied 49,530 49,688 2,138 55,323 1,814 Total commercial and industrial 92,444 94,062 10,477 99,063 2,939 Home equity lines 9,575 9,575 206 8,318 346 Consumer mortgages 22,173 23,297 651 26,044 1,229 Credit cards — — — — — Other retail loans 4,651 4,651 132 5,105 323 Total retail 36,399 37,523 989 39,467 1,898 Total impaired loans with allowance recorded $ 266,692 270,004 30,435 308,224 9,522 Total impaired loans Investment properties $ 72,356 75,251 10,070 84,836 2,131 1-4 family properties 52,883 56,902 6,184 64,236 1,618 Land acquisition 32,719 63,791 2,715 48,690 936 Total commercial real estate 157,958 195,944 18,969 197,762 4,685 Commercial, financial and agricultural 47,307 51,980 8,339 49,477 1,125 Owner-occupied 58,292 60,898 2,138 69,980 1,814 Total commercial and industrial 105,599 112,878 10,477 119,457 2,939 Home equity lines 10,605 10,605 206 8,891 346 Consumer mortgages 22,987 24,238 651 27,039 1,229 Credit cards — — — — — Other retail loans 4,651 4,651 132 5,105 323 Total retail 38,243 39,494 989 41,035 1,898 Total impaired loans $ 301,800 348,316 30,435 358,254 9,522 The average recorded investment in impaired loans was $375.5 million and $323.5 million for the nine and three months ended September 30, 2015 . Excluding accruing TDRs, there was no interest income recognized for the investment in impaired loans for the nine and three months ended September 30, 2015 . Interest income recognized for accruing TDRs was $7.3 million and $2.2 million for the nine and three months ended September 30, 2015 . At September 30, 2016 and December 31, 2015 , impaired loans of $57.2 million and $77.9 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 nine and three months ended September 30, 2016 and 2015 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Nine Months Ended September 30, 2016 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 4 $ — 1,826 3,518 5,344 1-4 family properties 23 — 3,703 1,211 4,914 Land acquisition 13 — — 1,766 1,766 Total commercial real estate 40 — 5,529 6,495 12,024 Commercial, financial and agricultural 50 — 13,948 5,232 19,180 Owner-occupied 7 — 5,458 550 6,008 Total commercial and industrial 57 — 19,406 5,782 25,188 Home equity lines 5 — 224 123 347 Consumer mortgages 6 — 354 51 405 Credit cards — — — — — Other retail loans 24 — 394 1,828 2,222 Total retail 35 — 972 2,002 2,974 Total TDRs 132 $ — 25,907 14,279 40,186 (1 ) Three Months Ended September 30, 2016 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 1 $ — — 3,370 3,370 1-4 family properties 4 — 213 47 260 Land acquisition 2 — — 497 497 Total commercial real estate 7 — 213 3,914 4,127 Commercial, financial and agricultural 5 — — 387 387 Owner-occupied 1 — 2,791 — 2,791 Total commercial and industrial 6 — 2,791 387 3,178 Home equity lines 2 — — 123 123 Consumer mortgages — — — — — Credit cards — — — — — Other retail loans 7 — 70 294 364 Total retail 9 — 70 417 487 Total TDRs 22 $ — 3,074 4,718 7,792 (2 ) (1) No net charge-offs were recorded during the nine months ended September 30, 2016 upon restructuring of these loans. (2) No net charge-offs were recorded during the three months ended September 30, 2016 upon restructuring of these loans. TDRs by Concession Type Nine Months Ended September 30, 2015 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 5 $ — 16,932 6,905 23,837 1-4 family properties 31 14,823 4,078 1,774 20,675 Land acquisition 8 — 604 1,187 1,791 Total commercial real estate 44 14,823 21,614 9,866 46,303 Commercial, financial and agricultural 71 — 3,094 5,455 8,549 Owner-occupied 7 — 1,739 1,314 3,053 Total commercial and industrial 78 — 4,833 6,769 11,602 Home equity lines 53 — 2,826 2,905 5,731 Consumer mortgages 12 — 510 786 1,296 Credit cards — — — — — Other retail loans 20 — 259 634 893 Total retail 85 — 3,595 4,325 7,920 Total TDRs 207 $ 14,823 30,042 20,960 65,825 (3 ) Three Months Ended September 30, 2015 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 1 $ — — 3,090 3,090 1-4 family properties 10 — 721 895 1,616 Land acquisition 2 — — 368 368 Total commercial real estate 13 — 721 4,353 5,074 Commercial, financial and agricultural 22 — 1,514 1,611 3,125 Owner-occupied 4 — — 898 898 Total commercial and industrial 26 — 1,514 2,509 4,023 Home equity lines 5 — 309 757 1,066 Consumer mortgages — — — — — Credit cards — — — — — Other retail loans 7 — 2 139 141 Total retail 12 — 311 896 1,207 Total TDRs 51 $ — 2,546 7,758 10,304 (4 ) (3) Net charge-offs of $4.0 million were recorded during the nine months ended September 30, 2015 upon restructuring of these loans. (4) No net charge-offs were recorded during the three months ended September 30, 2015 upon restructuring of these loans. For the nine and three months ended September 30, 2016 , there were two defaults with a recorded investment of $181 thousand and one default with a recorded investment of $89 thousand , respectively, 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 four defaults with a recorded investment of $593 thousand and two defaults with a recorded investment of $478 thousand , respectively, for the nine and three months ended September 30, 2015 . 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 changes from a general pool-level reserve to a 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 September 30, 2016 , the allowance for loan losses allocated to accruing TDRs totaling $201.9 million was $11.8 million compared to accruing TDRs of $223.9 million with an allocated allowance for loan losses of $12.6 million at December 31, 2015 . 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)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Other Comprehensive Income (Loss)	Note 6 - Other Comprehensive Income (Loss) The following tables illustrate activity within the balances in accumulated other comprehensive income (loss) by component for the nine and three months ended September 30, 2016 and 2015 . 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, 2015 $ (12,504 ) (18,222 ) 907 (29,819 ) Other comprehensive income before reclassifications — 34,827 63 34,890 Amounts reclassified from accumulated other comprehensive income (loss) 247 (77 ) (76 ) 94 Net current period other comprehensive income 247 34,750 (13 ) 34,984 Balance as of September 30, 2016 $ (12,257 ) 16,528 894 5,165 Balance as of July 1, 2016 $ (12,297 ) 22,459 843 11,005 Other comprehensive income before reclassifications — (5,895 ) 63 (5,832 ) Amounts reclassified from accumulated other comprehensive income (loss) 40 (36 ) (12 ) (8 ) Net current period other comprehensive income 40 (5,931 ) 51 (5,840 ) Balance as of September 30, 2016 $ (12,257 ) 16,528 894 5,165 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, 2014 $ (12,824 ) (713 ) 932 (12,605 ) Other comprehensive income before reclassifications — 7,941 143 8,084 Amounts reclassified from accumulated other comprehensive income (loss) 206 (1,667 ) (110 ) (1,571 ) Net current period other comprehensive income 206 6,274 33 6,513 Balance as of September 30, 2015 $ (12,618 ) 5,561 965 (6,092 ) Balance as of July 1, 2015 $ (12,687 ) (10,659 ) 1,023 (22,323 ) Other comprehensive income (loss) before reclassifications — 16,220 — 16,220 Amounts reclassified from accumulated other comprehensive income (loss) 69 — (58 ) 11 Net current period other comprehensive income (loss) 69 16,220 (58 ) 16,231 Balance as of September 30, 2015 $ (12,618 ) 5,561 965 (6,092 ) 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 unrealized gains and 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 financial instruments, equity securities, and debt securities as a single portfolio. As of September 30, 2016 , the 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 a 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 Nine Months Ended September 30, 2016 2015 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ (205 ) (336 ) Interest expense Amortization of deferred losses (197 ) — Loss on early extinguishment of debt 155 130 Income tax (expense) benefit $ (247 ) (206 ) Reclassifications, net of income taxes Net unrealized gains (losses) on investment securities available for sale: Realized gain on sale of securities $ 126 2,710 Investment securities gains, net (49 ) (1,043 ) Income tax (expense) benefit $ 77 1,667 Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 124 178 Salaries and other personnel expense (48 ) (68 ) Income tax (expense) benefit $ 76 110 Reclassifications, net of income taxes 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 Three Months Ended September 30, 2016 2015 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ (65 ) (112 ) Interest expense 25 43 Income tax (expense) benefit $ (40 ) (69 ) Reclassifications, net of income taxes Net unrealized gains (losses) on investment securities available for sale: Realized gain on sale of securities $ 59 — Investment securities gains, net (23 ) — Income tax (expense) benefit $ 36 — Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 20 94 Salaries and other personnel expense (8 ) (36 ) Income tax (expense) benefit $ 12 58 Reclassifications, net of income taxes

Fair Value Accounting

Fair Value Accounting	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Accounting	Note 7 - 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 marketable equity securities, 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 U.S. Government sponsored enterprises and agencies, obligations of states and municipalities, collateralized mortgage obligations issued by U.S. Government sponsored enterprises, and mortgage loans held-for-sale are generally included in this category. Certain private equity investments that invest in publicly traded companies are also considered Level 2 assets. 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 real estate, certain equity investments, and private equity investments. See "Note 14 - Fair Value Accounting" to the consolidated financial statements of Synovus' 2015 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 September 30, 2016 and December 31, 2015 , according to the valuation hierarchy included in ASC 820-10. For equity and debt securities, class was determined based on the nature and risks of the investments. Transfers between levels during the nine and three months ended September 30, 2016 and year ended December 31, 2015 were inconsequential. September 30, 2016 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities 2,371 2,371 Mortgage-backed securities issued by U.S. Government agencies — 2,380 — 2,380 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 1,860 — 1,860 State and municipal securities — 698 — 698 Total trading securities $ — 7,309 — 7,309 Mortgage loans held for sale — 95,769 — 95,769 Investment securities available for sale: U.S. Treasury securities 74,512 — — 74,512 U.S. Government agency securities — 13,143 — 13,143 Mortgage-backed securities issued by U.S. Government agencies — 185,151 — 185,151 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,422,656 — 2,422,656 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 876,109 — 876,109 State and municipal securities — 2,899 — 2,899 Equity securities 8,647 — — 8,647 Other investments (1) 3,172 15,091 1,773 20,036 Total investment securities available for sale $ 86,331 3,515,049 1,773 3,603,153 Private equity investments — — 25,992 25,992 Mutual funds held in rabbi trusts 11,206 — — 11,206 Derivative assets: Interest rate contracts — 32,336 — 32,336 Mortgage derivatives (2) — 2,407 — 2,407 Total derivative assets $ — 34,743 — 34,743 Liabilities Trading account liabilities — 5,666 — 5,666 Derivative liabilities: Interest rate contracts — 32,747 — 32,747 Mortgage derivatives (2) — 659 — 659 Visa derivative — — 1,415 1,415 Total derivative liabilities $ — 33,406 1,415 34,821 December 31, 2015 (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 — 2,922 — 2,922 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 1,078 — 1,078 State and municipal securities — 1,097 — 1,097 Total trading securities $ — 5,097 — 5,097 Mortgage loans held for sale — 59,275 — 59,275 Investment securities available for sale: U.S. Treasury securities 43,357 — — 43,357 U.S. Government agency securities — 13,623 — 13,623 Securities issued by U.S. Government sponsored enterprises — 126,909 — 126,909 Mortgage-backed securities issued by U.S. Government agencies — 210,004 — 210,004 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,630,419 — 2,630,419 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 529,597 — 529,597 State and municipal securities — 4,434 — 4,434 Equity securities 9,672 — — 9,672 Other investments (1) 3,073 14,985 1,745 19,803 Total investment securities available for sale $ 56,102 3,529,971 1,745 3,587,818 Private equity investments — 870 27,148 28,018 Mutual funds held in rabbi trusts 10,664 — — 10,664 Derivative assets: Interest rate contracts — 25,580 — 25,580 Mortgage derivatives (2) — 1,559 — 1,559 Total derivative assets $ — 27,139 — 27,139 Liabilities Trading account liabilities — 1,032 — 1,032 Derivative liabilities: Interest rate contracts — 26,030 — 26,030 Visa derivative — — 1,415 1,415 Total derivative liabilities $ — 26,030 1,415 27,445 (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. 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 Nine Months Ended September 30, For the Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Mortgage loans held for sale $ 1,762 450 $ (87 ) 1,012 Mortgage Loans Held for Sale (in thousands) As of September 30, 2016 As of December 31, 2015 Fair value $ 95,769 59,275 Unpaid principal balance 92,910 58,177 Fair value less aggregate unpaid principal balance $ 2,859 1,098 Changes in Level 3 Fair Value Measurements and Quantitative Information about Level 3 Fair Value Measurements As noted above, Synovus uses significant unobservable inputs (Level 3) 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 nine and three months ended September 30, 2016 and 2015 (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 nine and three months ended September 30, 2016 and 2015 , Synovus did not have any transfers between levels in the fair value hierarchy. Nine Months Ended September 30, 2016 2015 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Investment Securities Available for Sale Private Equity Investments Visa Derivative Beginning balance, January 1, $ 1,745 27,148 (1,415 ) 1,645 27,367 (1,401 ) Total gains (losses) realized/unrealized: Included in earnings — (527 ) (1,080 ) — (517 ) (1,092 ) Unrealized gains (losses) included in other comprehensive income 28 — — (114 ) — — Purchases — — — — — — Sales — — — — — — Issuances — — — — — — Settlements — (629 ) 1,080 — — 1,078 Amortization of discount/premium — — — — — — Transfers in and/or out of Level 3 — — — — — — Ending balance, September 30, $ 1,773 25,992 (1,415 ) 1,531 26,850 (1,415 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30, $ — (527 ) (1,080 ) — (517 ) (1,092 ) Three Months Ended September 30, 2016 2015 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Investment Securities Available for Sale Private Equity Investments Visa Derivative Beginning balance, July 1, $ 1,625 26,866 (1,415 ) 1,700 26,959 (1,415 ) Total gains (losses) realized/unrealized: Included in earnings — (249 ) (360 ) — (109 ) (363 ) Unrealized gains (losses) included in other comprehensive income 148 — — (169 ) — — Settlements — (625 ) 360 — — 363 Ending balance, September 30, $ 1,773 25,992 (1,415 ) 1,531 26,850 (1,415 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30, $ — (249 ) (360 ) — (109 ) (363 ) 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. 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. September 30, 2016 December 31, 2015 Valuation Technique Significant Unobservable Input Range (Weighted Average) (1) Range (Weighted Average) (1) Assets 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 438 bps 477 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 N/A N/A Discount for lack of liquidity (2) 15% 15% Visa derivative liability Internal valuation Estimated future cumulative deposits to the litigation escrow for settlement of the Covered Litigation, and estimated future monthly fees payable to the derivative counterparty N/A N/A (1) The range represents management's best estimate of the high and low of the value that would be assigned to a particular input. (2) Represents management's estimate of discount that market participants would require based on the instrument's lack of liquidity. Assets Measured at Fair Value on a Non-recurring Basis Certain assets are recorded at fair value on a non-recurring basis. These 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 period. September 30, 2016 December 31, 2015 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans * $ — — 5,952 5,952 — — 11,264 11,264 Other loans held for sale — — 2,474 2,474 — — 425 425 Other real estate — — 11,036 11,036 — — 23,519 23,519 Other assets held for sale $ — — 7,094 7,094 — — 3,425 3,425 The following table presents fair value adjustments recognized in earnings for the nine and three months ended September 30, 2016 and 2015 for the assets measured at fair value on a non-recurring basis. Nine Months Ended September 30, Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Impaired loans * $ 1,329 3,549 59 1,789 Other loans held for sale 2,096 — 2,096 — Other real estate 2,405 7,405 968 2,645 Other assets held for sale 7,532 1,043 907 1,043 * Collateral-dependent impaired loans that were written down to collateral 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. September 30, 2016 December 31, 2015 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 or contracted sales price Discount to appraised value (2) Estimated selling costs 0% - 52% (11%) 0% - 10% (7%) 0%-80% (29%) 0%-10% (7%) Other loans held for sale Third-party appraised value of collateral less estimated selling costs or contracted sales price Discount to appraised value (2) Estimated selling costs 0%-13% (13%) 0%-10% (7%) 0%-3% (3%) 0%-10% (7%) Other real estate Third-party appraised value of real estate less estimated selling costs or contracted sales price Discount to appraised value (2) Estimated selling costs 0% - 10% (6%) 0% - 10% (7%) 0%-20% (7%) 0%-10% (7%) Other assets held for sale Third-party appraised value of real estate or other asset less estimated selling costs or BOV Discount to appraised value (2) Estimated selling costs 0%-71% (41%) 0%-10% (7%) 0%-35% (31%) 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 September 30, 2016 and December 31, 2015 . 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 September 30, 2016 and December 31, 2015 are as follows: September 30, 2016 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 367,342 367,342 367,342 — — Interest bearing funds with Federal Reserve Bank 985,776 985,776 985,776 — — Interest earning deposits with banks 18,375 18,375 18,375 — — Federal funds sold and securities purchased under resale agreements 71,753 71,753 71,753 — — Trading account assets 7,309 7,309 — 7,309 — Mortgage loans held for sale 95,769 95,769 — 95,769 — Other loans held for sale 2,474 2,474 2,474 Investment securities available for sale 3,603,153 3,603,153 86,331 3,515,049 1,773 Private equity investments 25,992 25,992 — — 25,992 Mutual funds held in rabbi trusts 11,206 11,206 11,206 — — Loans, net of deferred fees and costs 23,262,887 22,991,371 — — 22,991,371 Derivative assets 34,743 34,743 — 34,743 — Financial liabilities Trading account liabilities 5,666 5,666 — 5,666 — Non-interest bearing deposits 7,059,059 7,059,059 — 7,059,059 — Interest bearing deposits 17,132,944 17,125,098 — 17,125,098 — Federal funds purchased and securities sold under repurchase agreements 195,025 195,025 195,025 — — Long-term debt 2,160,985 2,233,257 — 2,233,257 — Derivative liabilities $ 34,821 34,821 — 33,406 1,415 December 31, 2015 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 367,092 367,092 367,092 — — Interest bearing funds with Federal Reserve Bank 829,887 829,887 829,887 — — Interest earning deposits with banks 17,387 17,387 17,387 — — Federal funds sold and securities purchased under resale agreements 69,819 69,819 69,819 — — Trading account assets 5,097 5,097 5,097 — Mortgage loans held for sale 59,275 59,275 59,275 — Other loans held for sale 425 425 — — 425 Investment securities available for sale 3,587,818 3,587,818 56,102 3,529,971 1,745 Private equity investments 28,018 28,018 — 870 27,148 Mutual funds held in rabbi trusts 10,664 10,664 10,664 — — Loans, net of deferred fees and costs 22,429,565 22,192,903 — — 22,192,903 Derivative assets 27,139 27,139 — 27,139 — Financial liabilities Trading account liabilities 1,032 1,032 — 1,032 — Non-interest bearing deposits 6,732,970 6,732,970 — 6,732,970 — Interest bearing deposits 16,509,691 16,516,222 — 16,516,222 — Federal funds purchased and securities sold under repurchase agreements 177,025 177,025 177,025 — — Long-term debt 2,186,893 2,244,376 — 2,244,376 — Derivative liabilities $ 27,445 27,445 — 26,030 1,415

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2016
Summary of Derivative Instruments [Abstract]
Derivative Instruments	Note 8 - 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 September 30, 2016 and December 31, 2015, 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 periodic detailed financial reviews. 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. Cash Flow Hedges As of September 30, 2016 , there were no cash flow hedges outstanding. Synovus did not terminate any cash flow hedges during 2016 or 2015 . The remaining unamortized deferred net loss balance of all previously terminated cash flow hedges at September 30, 2016 and December 31, 2015 was $(195) thousand and $(597) thousand , respectively. Synovus expects to reclassify from accumulated other comprehensive income (loss) the remaining $195 thousand to interest expense during the next nine months as amortization of deferred losses from prior period cash flow hedge terminations is recognized. Additionally, Synovus recognized $197 thousand of the deferred loss balance to loss on early extinguishment of debt during the first quarter of 2016. Fair Value Hedges As of September 30, 2016 , there were no fair value hedges outstanding. Synovus did not terminate any fair value hedges during 2016 or 2015 . The remaining unamortized deferred gain balance on all previously terminated fair value hedges at September 30, 2016 and December 31, 2015 was $1.3 million and $4.0 million , respectively. Synovus expects to reclassify from hedge-related basis adjustment, a component of long-term debt, the remaining $1.3 million of deferred gain balance on previously terminated fair value hedges as a reduction to interest expense during the next nine months as amortization of deferred gains is recorded. Additionally, Synovus recorded $1.3 million of the unamortized deferred gain balance to loss on early extinguishment of debt during the first quarter of 2016. 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 third-party financial institutions. 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 in non-interest income in Synovus' consolidated statements of income. As of September 30, 2016 , the notional amount of customer related interest rate derivative financial instruments, including both the customer position and the offsetting position, was $1.31 billion , an increase of $30.0 million compared to December 31, 2015 . 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 $1.4 million at both September 30, 2016 and December 31, 2015. 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. 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. 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 September 30, 2016 and December 31, 2015 , Synovus had commitments to fund at a locked interest rate, primarily fixed-rate mortgage loans to customers in the amount of $ 120.1 million and $88.8 million , respectively. The fair value of these commitments resulted in a gain of $1.0 million and $632 thousand for the nine months ended September 30, 2016 and 2015 , respectively, which was recorded as a component of mortgage banking income in the consolidated statements of income. At September 30, 2016 and December 31, 2015 , outstanding commitments to sell primarily fixed-rate mortgage loans amounted to $39.4 million and $95.0 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 $830 thousand and $356 thousand for the nine months ended September 30, 2016 and 2015 , respectively, which were recorded as a component of mortgage banking income in the consolidated statements of income. Collateral Contingencies Certain derivative counterparties require Synovus to maintain specified minimum credit ratings from each of the major credit rating agencies. Should Synovus’ credit rating fall below these specified ratings, the counterparties have the contractual right to demand immediate and ongoing full collateralization on derivative instruments in net liability positions and, for certain counterparties, request immediate termination. Certain of these agreements currently require Synovus to post collateral against specific derivative positions. Additionally, as of June 10, 2013, the CCC became mandatory for certain trades as required under the Dodd-Frank Act. These derivative transactions also carry collateral requirements, both at the inception of the trade, and as the value of each derivative position changes. As trades are migrated to the CCC, dealer counterparty exposure will be reduced, and higher notional amounts of Synovus' derivative instruments will be housed at the CCC, a highly regulated and well-capitalized entity. As of September 30, 2016 , collateral totaling $71.0 million , consisting of Federal funds sold, was pledged to the derivative counterparties, including $23.3 million with the CCC, to comply with collateral requirements. The impact of derivative instruments on the consolidated balance sheets at September 30, 2016 and December 31, 2015 is presented below. Fair Value of Derivative Assets Fair Value of Derivative Liabilities (in thousands) Location on Consolidated Balance Sheet September 30, 2016 December 31, 2015 Location on Consolidated Balance Sheet September 30, 2016 December 31, 2015 Derivatives not designated as hedging instruments: Interest rate contracts Other assets $ 32,336 25,580 Other liabilities 32,747 26,030 Mortgage derivatives Other assets 2,407 1,559 Other liabilities 659 — Visa derivative — — Other liabilities 1,415 1,415 Total derivatives not designated as hedging instruments $ 34,743 27,139 34,821 27,445 The pre-tax effect of fair value hedges on the consolidated statements of income for the nine and three months ended September 30, 2016 is presented below. Location of Gain (Loss) Recognized in Income Gain (Loss) Recognized in Income (in thousands) Nine Months Ended September 30, Derivatives not designated as hedging instruments 2016 2015 Interest rate contracts (1) Other non-interest income $ 39 10 Mortgage derivatives (2) Mortgage banking income 189 276 Total $ 228 286 Gain (Loss) Recognized in Income (in thousands) Three Months Ended September 30, Derivatives not designated as hedging instruments Location of Gain (Loss) Recognized in Income 2016 2015 Interest rate contracts (1) Other non-interest income $ 5 170 Mortgage derivatives (2) Mortgage banking income 674 (1,955 ) Total $ 679 (1,785 ) (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. During the nine months ended September 30, 2016 and 2015 , Synovus reclassified $1.4 million and $2.3 million , respectively, from hedge-related basis adjustment, a component of long-term debt, as a reduction to interest expense. Additionally, during the nine months ended September 30, 2016 , Synovus reclassified $1.3 million from hedge-related basis adjustment, as a reduction to loss on early extinguishment of debt. These deferred gains relate to hedging relationships that have been previously terminated and are reclassified into earnings over the remaining life of the hedged items.

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Income Per Common Share	Note 9 - 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 nine and three months ended September 30, 2016 . Nine Months Ended September 30, Three Months Ended September 30, (in thousands, except per share data) 2016 2015 2016 2015 Basic Net Income Per Common Share: Net income available to common shareholders $ 170,555 160,006 $ 62,686 55,369 Weighted average common shares outstanding 125,076 133,120 122,924 131,516 Net income per common share, basic $ 1.36 1.20 0.51 0.42 Diluted Net Income Per Common Share: Net income available to common shareholders $ 170,555 160,006 $ 62,686 55,369 Weighted average common shares outstanding 125,076 133,120 122,924 131,516 Potentially dilutive shares from outstanding equity-based awards 636 756 680 781 Weighted average diluted common shares 125,712 133,876 123,604 132,297 Net income per common share, diluted $ 1.36 1.20 0.51 0.42 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 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 September 30, 2016 and 2015 , there were 2.5 million and 2.7 million , respectively, potentially dilutive shares related to common stock options and Warrants to purchase shares of common stock that were outstanding during 2016 and 2015 , 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	9 Months Ended
	Sep. 30, 2016
Share-based Compensation [Abstract]
Share-based Compensation	Note 10 - 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. At September 30, 2016 , Synovus had a total of 6.1 million shares of its authorized but unissued common stock reserved for future grants under the 2013 Omnibus Plan. 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. 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. Stock options are granted at exercise prices which equal the fair value of a share of common stock on the grant-date. Market restricted share units and performance share units are granted at target and are compared annually to required market and performance metrics to determine final 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 $10.2 million and $3.4 million for the nine and three months ended September 30, 2016 , respectively, and $9.5 million and $3.2 million for the nine and three months ended September 30, 2015 , respectively. Stock Options No stock option grants were made during the nine months ended September 30, 2016 . At September 30, 2016 , there were 1.4 million outstanding options to purchase shares of common stock with a weighted average exercise price of $34.77 per share. Restricted Share Units, Performance Share Units, and Market Restricted Share Units During the nine months ended September 30, 2016 , Synovus awarded 344 thousand restricted share units that have a service-based vesting period of three years and awarded 84 thousand performance share units that vest upon service and performance conditions. Synovus also granted 94 thousand market restricted share units during the nine months ended September 30, 2016 . The weighted average grant-date fair value of the awarded restricted share units, performance share units and market restricted share units was $26.35 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) 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). 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 September 30, 2016 , including dividend equivalents granted, there were 1.1 million restricted share units, performance share units and market restricted share units outstanding with a weighted average grant-date fair value of $26.36 per share.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 11 - 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. The carrying amount of loan commitments and letters of credit closely approximates the fair value of such financial instruments. Carrying amounts include unamortized fee income and, in some instances, allowances for any estimated credit losses from these financial instruments. These amounts are not material to Synovus' consolidated balance sheets. Unfunded lending commitments and letters of credit at September 30, 2016 and December 31, 2015 are presented below. (in thousands) September 30, 2016 December 31, 2015 Letters of credit* $ 159,041 166,936 Commitments to fund commercial real estate, construction, and land development loans 1,525,451 1,882,130 Unused credit card lines 1,093,049 1,055,181 Commitments under home equity lines of credit 1,095,322 1,051,386 Commitments to fund commercial and industrial loans 4,169,740 4,094,809 Other loan commitments 403,222 284,706 Total unfunded lending commitments and letters of credit $ 8,445,825 8,535,148 * Represents the contractual amount net of risk participations of $82 million and $66 million at September 30, 2016 and December 31, 2015, respectively.

Legal Proceedings

Legal Proceedings	9 Months Ended
	Sep. 30, 2016
Legal Proceedings Disclosure [Abstract]
Legal Proceedings	Note 12 - Legal Proceedings Synovus and its subsidiaries are subject to various legal proceedings, claims and disputes 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 legal actions and other proceedings asserting claims for damages and related relief for losses. These actions include mortgage loan and other loan put-back claims, 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 such asserted legal actions, credit-related litigation could result in additional write-downs or charge-offs of assets, 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 September 30, 2016 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, including those legal matters described below, 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 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 that the aggregate range from our pending and threatened litigation, including, without limitation, the matters described below, is from zero to $12 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 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, reputational risk and distraction of defending such legal matters. Synovus also maintains insurance coverage, which may (or may not) be available to cover legal fees, or potential losses that might be incurred in connection with the legal matters described below. 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. TelexFree Litigation On October 22, 2014, several pending lawsuits were consolidated into a multi-district putative class action case captioned In re: TelexFree Securities Litigation, MDL Number 4:14-md2566-TSH, United States District Court District of Massachusetts. Synovus Financial Corp. and Synovus Bank were named as defendants with numerous other defendants in the purported class action lawsuit. An Amended Complaint was filed on March 31, 2015 which consolidated and amended the claims previously asserted. The claims against Synovus Financial Corp. were dismissed by Plaintiffs on April 10, 2015 so now, as to Synovus-related entities, only claims against Synovus Bank remain pending. TelexFree was a merchant customer of Base Commerce, LLC, an independent sales organization/member service provider sponsored by Synovus Bank. The purported class action lawsuit generally alleges that TelexFree engaged in an improper multi-tier marketing scheme involving voice-over Internet protocol telephone services and that the various defendants, including Synovus Bank, provided financial services to TelexFree that allowed TelexFree to conduct its business operations. Synovus Bank filed a motion to dismiss the lawsuit on June 1, 2015, which remains pending before the court. Synovus believes it has substantial defenses related to these purported claims and intends to vigorously defend the claims asserted. Synovus currently cannot reasonably estimate losses attributable to this matter.

Significant Accounting Polici21

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
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' 2015 Form 10-K. There have been no significant changes to the accounting policies as disclosed in Synovus' 2015 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, the fair value of private equity investments, and contingent liabilities related to legal matters.
Cash and Cash Equivalents	Cash and cash equivalents consist of cash and due from banks.
Short-term Investment	Short-term investments consist of interest bearing funds with the Federal Reserve Bank, interest earning deposits with banks, and Federal funds sold and securities purchased under resale agreements.
Recently Adopted Accounting Standards Updates	During 2015, the FASB issued ASU 2015-02, Amendments to the Consolidation Analysis , which became effective for Synovus on January 1, 2016. ASU 2015-02 was issued by the FASB to modify the analysis that companies must perform in order to determine whether a legal entity should be consolidated. ASU 2015-02 simplifies current consolidation rules by reducing the number of consolidation models; placing more emphasis on risk of loss when determining a controlling financial interest; reducing the frequency of the application of related-party guidance when determining a controlling financial interest in a VIE; and changing consolidation conclusions for public and private companies in several industries that typically make use of limited partnerships or VIEs. Adoption of ASU 2015-02 did not have an impact on Synovus’ consolidated financial statements.
Reclassifications	Prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current periods' presentation.
Subsequent Events	Synovus has evaluated for consideration, or disclosure, all transactions, events, and circumstances, subsequent to the date of the consolidated balance sheet and through the date the accompanying unaudited interim consolidated financial statements were issued, and has reflected, or disclosed, those items deemed appropriate within the unaudited interim consolidated financial statements. On October 1, 2016, Synovus completed its acquisition of Entaire Global Companies, Inc. ("Entaire"), an Atlanta-based specialty financial services company. Under the terms of the agreement, Synovus acquired Entaire for an up-front payment of $30.0 million in common stock and cash, with potential additional payments to Entaire's stockholders over the next three to five years based on Entaire's earnings. As of October 1, 2016, Entaire had approximately $370 million in total assets, including loans totaling approximately $357 million .

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2016
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 September 30, 2016 and December 31, 2015 are summarized below. September 30, 2016 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 73,758 754 — 74,512 U.S. Government agency securities 12,728 415 — 13,143 Securities issued by U.S. Government sponsored enterprises — — — — Mortgage-backed securities issued by U.S. Government agencies 181,772 3,481 (102 ) 185,151 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,391,778 31,624 (746 ) 2,422,656 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 868,723 8,108 (722 ) 876,109 State and municipal securities 2,870 30 (1 ) 2,899 Equity securities 2,755 5,892 — 8,647 Other investments 20,227 91 (282 ) 20,036 Total investment securities available for sale $ 3,554,611 50,395 (1,853 ) 3,603,153 December 31, 2015 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 43,125 232 — 43,357 U.S. Government agency securities 13,087 536 — 13,623 Securities issued by U.S. Government sponsored enterprises 126,520 389 — 126,909 Mortgage-backed securities issued by U.S. Government agencies 209,785 1,340 (1,121 ) 210,004 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,645,107 7,874 (22,562 ) 2,630,419 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 530,426 2,396 (3,225 ) 529,597 State and municipal securities 4,343 92 (1 ) 4,434 Equity securities 3,228 6,444 — 9,672 Other investments 20,177 — (374 ) 19,803 Total investment securities available for sale $ 3,595,798 19,303 (27,283 ) 3,587,818
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 September 30, 2016 and December 31, 2015 , are presented below. September 30, 2016 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 Mortgage-backed securities issued by U.S. Government agencies 8,058 61 3,961 41 12,019 102 Mortgage-backed securities issued by U.S. Government sponsored enterprises 351,518 746 — — 351,518 746 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 197,340 460 26,566 262 223,906 722 State and municipal securities — — 54 1 54 1 Other investments — — 4,945 282 4,945 282 Total $ 556,916 1,267 35,526 586 592,442 1,853 December 31, 2015 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 Mortgage-backed securities issued by U.S. Government agencies 122,626 639 18,435 482 141,061 1,121 Mortgage-backed securities issued by U.S. Government sponsored enterprises 1,656,194 12,874 489,971 9,688 2,146,165 22,562 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 196,811 963 72,366 2,262 269,177 3,225 State and municipal securities — — 50 1 50 1 Other investments 14,985 15 4,818 359 19,803 374 Total $ 1,990,616 14,491 585,640 12,792 2,576,256 27,283
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 September 30, 2016 (in thousands) Within One Year 1 to 5 Years 5 to 10 Years More Than 10 Years No Stated Maturity Total Amortized Cost U.S. Treasury securities $ 18,770 54,988 — — — 73,758 U.S. Government agency securities 999 5,929 5,800 — — 12,728 Securities issued by U.S. Government sponsored enterprises — — — — — — Mortgage-backed securities issued by U.S. Government agencies — — 15,175 166,597 — 181,772 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 334 947,156 1,444,288 — 2,391,778 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 868,723 — 868,723 State and municipal securities 164 240 — 2,466 — 2,870 Equity securities — — — 2,755 2,755 Other investments — — 15,000 2,000 3,227 20,227 Total amortized cost $ 19,933 61,491 983,131 2,484,074 5,982 3,554,611 Fair Value U.S. Treasury securities $ 18,770 55,742 — — — 74,512 U.S. Government agency securities 1,034 6,071 6,038 — — 13,143 Securities issued by U.S. Government sponsored enterprises — — — — — — Mortgage-backed securities issued by U.S. Government agencies — — 15,568 169,583 — 185,151 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 345 957,800 1,464,511 — 2,422,656 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 876,109 — 876,109 State and municipal securities 164 242 — 2,493 — 2,899 Equity securities — — — — 8,647 8,647 Other investments — — 15,091 1,774 3,171 20,036 Total fair value $ 19,968 62,400 994,497 2,514,470 11,818 3,603,153
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 nine and three months ended September 30, 2016 and 2015 are presented below. The specific identification method is used to reclassify gains and losses out of other comprehensive income at the time of sale. Nine Months Ended September 30, Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Proceeds from sales of investment securities available for sale $ 596,824 82,156 $ 353,215 — Gross realized gains 2,590 2,710 1,635 — Gross realized losses (2,464 ) — (1,576 ) — Investment securities gains, net $ 126 2,710 $ 59 —

Restructuring Charges (Tables)

Restructuring Charges (Tables)	9 Months Ended
	Sep. 30, 2016
Restructuring Charges [Abstract]
Schedule of Restructuring and Related Costs	For the nine and three months ended September 30, 2016 and 2015 , total restructuring charges consist of the following components: Nine Months Ended September 30, Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Lease termination charges $ 6 (4 ) $ (25 ) — Asset impairment charges 8,107 229 1,240 229 Loss (gain) on sale of assets held for sale, net 13 (374 ) — (217 ) Professional fees and other charges 99 116 28 57 Total restructuring charges, net $ 8,225 (33 ) $ 1,243 69 The following tables present aggregate activity within the accrual for restructuring charges for the nine and three months ended September 30, 2016 and 2015 : (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2015 $ 1,930 4,687 6,617 Accruals for efficiency initiatives — 6 6 Payments (1,702 ) (533 ) (2,235 ) Balance at September 30, 2016 $ 228 4,160 4,388 Balance at July 1, 2016 593 4,375 4,968 Accruals for efficiency initiatives — (25 ) (25 ) Payments (365 ) (190 ) (555 ) Balance at September 30, 2016 $ 228 4,160 4,388 (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2014 $ 3,291 5,539 8,830 Accruals for efficiency initiatives — (4 ) (4 ) Payments (1,259 ) (608 ) (1,867 ) Balance at September 30, 2015 $ 2,032 4,927 6,959 Balance at July 1, 2015 2,253 5,124 7,377 Accruals for efficiency initiatives — — — Payments (221 ) (197 ) (418 ) Balance at September 30, 2015 $ 2,032 4,927 6,959

Loans and Allowance for Loan 24

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2016
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 September 30, 2016 and December 31, 2015 . Current, Accruing Past Due, and Non-accrual Loans September 30, 2016 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Investment properties $ 5,957,788 2,501 293 2,794 8,884 5,969,466 1-4 family properties 1,047,830 5,355 717 6,072 17,152 1,071,054 Land acquisition 414,425 2,678 1,283 3,961 6,672 425,058 Total commercial real estate 7,420,043 10,534 2,293 12,827 32,708 7,465,578 Commercial, financial and agricultural 6,475,826 17,987 942 18,929 49,874 6,544,629 Owner-occupied 4,441,624 8,145 153 8,298 21,443 4,471,365 Total commercial and industrial 10,917,450 26,132 1,095 27,227 71,317 11,015,994 Home equity lines 1,613,264 5,283 482 5,765 19,815 1,638,844 Consumer mortgages 2,212,358 9,411 101 9,512 21,284 2,243,154 Credit cards 229,735 1,309 1,265 2,574 — 232,309 Other retail loans 686,297 3,754 122 3,876 3,031 693,204 Total retail 4,741,654 19,757 1,970 21,727 44,130 4,807,511 Total loans $ 23,079,147 56,423 5,358 61,781 148,155 23,289,083 (1 ) December 31, 2015 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Investment properties $ 5,726,307 2,284 — 2,284 23,040 5,751,631 1-4 family properties 1,105,914 6,300 103 6,403 16,839 1,129,156 Land acquisition 495,542 639 32 671 17,768 513,981 Total commercial real estate 7,327,763 9,223 135 9,358 57,647 7,394,768 Commercial, financial and agricultural 6,391,036 12,222 785 13,007 49,137 6,453,180 Owner-occupied 4,293,308 5,254 95 5,349 20,293 4,318,950 Total commercial and industrial 10,684,344 17,476 880 18,356 69,430 10,772,130 Home equity lines 1,667,552 5,882 — 5,882 16,480 1,689,914 Consumer mortgages 1,907,644 8,657 134 8,791 22,248 1,938,683 Credit cards 237,742 1,663 1,446 3,109 — 240,851 Other retail loans 418,337 2,390 26 2,416 2,565 423,318 Total retail 4,231,275 18,592 1,606 20,198 41,293 4,292,766 Total loans $ 22,243,382 45,291 2,621 47,912 168,370 22,459,664 (2 ) (1) Total before net deferred fees and costs of $26.2 million . (2) Total before net deferred fees and costs of $30.1 million .
Loan Portfolio Credit Exposure	In the following tables, retail 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 retail loans (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 the associated senior lien with other financial institutions. Loan Portfolio Credit Exposure by Risk Grade September 30, 2016 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Investment properties $ 5,852,738 80,002 36,726 — — 5,969,466 1-4 family properties 961,369 48,024 54,619 7,042 — 1,071,054 Land acquisition 373,709 30,841 20,182 326 — 425,058 Total commercial real estate 7,187,816 158,867 111,527 7,368 — 7,465,578 Commercial, financial and agricultural 6,259,343 152,273 121,900 10,103 1,010 (3) 6,544,629 Owner-occupied 4,276,792 73,250 119,911 1,412 — 4,471,365 Total commercial and industrial 10,536,135 225,523 241,811 11,515 1,010 11,015,994 Home equity lines 1,611,366 — 22,131 2,895 2,452 (3) 1,638,844 Consumer mortgages 2,218,687 — 23,002 1,285 180 (3) 2,243,154 Credit cards 231,044 — 483 — 782 (4) 232,309 Other retail loans 689,663 — 3,429 42 70 (3) 693,204 Total retail 4,750,760 — 49,045 4,222 3,484 4,807,511 Total loans $ 22,474,711 384,390 402,383 23,105 4,494 23,289,083 (5 ) December 31, 2015 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Investment properties $ 5,560,595 114,705 76,331 — — 5,751,631 1-4 family properties 995,903 64,325 61,726 7,202 — 1,129,156 Land acquisition 436,835 46,208 30,574 364 — 513,981 Total commercial real estate 6,993,333 225,238 168,631 7,566 — 7,394,768 Commercial, financial and agricultural 6,184,179 152,189 100,658 13,330 2,824 (3) 6,453,180 Owner-occupied 4,118,631 78,490 121,272 98 459 (3) 4,318,950 Total commercial and industrial 10,302,810 230,679 221,930 13,428 3,283 10,772,130 Home equity lines 1,666,586 — 20,456 1,206 1,666 (3) 1,689,914 Consumer mortgages 1,910,649 — 26,041 1,700 293 (3) 1,938,683 Credit cards 239,405 — 480 — 966 (4) 240,851 Other retail loans 418,929 — 4,315 — 74 (3) 423,318 Total retail 4,235,569 — 51,292 2,906 2,999 4,292,766 Total loans $ 21,531,712 455,917 441,853 23,900 6,282 22,459,664 (6 ) (1) Includes $281.8 million and $303.7 million of Substandard accruing loans at September 30, 2016 and December 31, 2015 , 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 $26.2 million . (6) Total before net deferred fees and costs of $30.1 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 nine and three months ended September 30, 2016 and 2015 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Nine Months Ended September 30, 2016 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 87,133 122,989 42,374 252,496 Charge-offs (13,361 ) (17,098 ) (10,611 ) (41,070 ) Recoveries 10,927 6,122 3,601 20,650 Provision for loan losses (3,597 ) 18,875 6,463 21,741 Ending balance (1) $ 81,102 130,888 41,827 253,817 Ending balance: individually evaluated for impairment 11,066 11,474 1,724 24,264 Ending balance: collectively evaluated for impairment $ 70,036 119,414 40,103 229,553 Loans: Ending balance: total loans (1)(2) $ 7,465,578 11,015,994 4,807,511 23,289,083 Ending balance: individually evaluated for impairment 102,837 118,442 37,820 259,099 Ending balance: collectively evaluated for impairment $ 7,362,741 10,897,552 4,769,691 23,029,984 As Of and For The Nine Months Ended September 30, 2015 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 101,471 118,110 41,736 261,317 Charge-offs (12,120 ) (17,417 ) (16,535 ) (46,072 ) Recoveries 10,500 5,774 5,391 21,665 Provision for loan losses (10,845 ) 15,954 8,881 13,990 Ending balance (1) $ 89,006 122,421 39,473 250,900 Ending balance: individually evaluated for impairment 18,091 12,568 782 31,441 Ending balance: collectively evaluated for impairment $ 70,915 109,853 38,691 219,459 Loans: Ending balance: total loans (1)(3) $ 7,207,461 10,525,972 4,159,243 21,892,676 Ending balance: individually evaluated for impairment 159,582 109,904 39,858 309,344 Ending balance: collectively evaluated for impairment $ 7,047,879 10,416,068 4,119,385 21,583,332 (1) As of and for the nine months ended September 30, 2016 and 2015, 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 $26.2 million . (3) Total before net deferred fees and costs of $28.4 million . Allowance for Loan Losses and Recorded Investment in Loans As of and For The Three Months Ended September 30, 2016 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 79,359 129,633 46,084 255,076 Charge-offs (4,084 ) (6,437 ) (3,463 ) (13,984 ) Recoveries 4,237 1,780 1,037 7,054 Provision for loan losses 1,590 5,912 (1,831 ) 5,671 Ending balance (1) $ 81,102 130,888 41,827 253,817 Ending balance: individually evaluated for impairment 11,066 11,474 1,724 24,264 Ending balance: collectively evaluated for impairment $ 70,036 119,414 40,103 229,553 Loans: Ending balance: total loans (1)(2) $ 7,465,578 11,015,994 4,807,511 23,289,083 Ending balance: individually evaluated for impairment 102,837 118,442 37,820 259,099 Ending balance: collectively evaluated for impairment $ 7,362,741 10,897,552 4,769,691 23,029,984 As of and For The Three Months Ended September 30, 2015 (in thousands) Commercial Real Estate Commercial & Industrial Retail Total Allowance for loan losses: Beginning balance $ 90,691 123,050 40,961 254,702 Charge-offs (1,722 ) (8,342 ) (4,779 ) (14,843 ) Recoveries 4,019 2,203 1,863 8,085 Provision for loan losses (3,982 ) 5,510 1,428 2,956 Ending balance (1) $ 89,006 122,421 39,473 250,900 Ending balance: individually evaluated for impairment 18,091 12,568 782 31,441 Ending balance: collectively evaluated for impairment $ 70,915 109,853 38,691 219,459 Loans: Ending balance: total loans (1)(3) $ 7,207,461 10,525,972 4,159,243 21,892,676 Ending balance: individually evaluated for impairment 159,582 109,904 39,858 309,344 Ending balance: collectively evaluated for impairment $ 7,047,879 10,416,068 4,119,385 21,583,332 (1) As of and for the three months ended September 30, 2016 and 2015, 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 $26.2 million . (3) Total before net deferred fees and costs of $28.4 million .
Schedule of Impaired Loans	The tables below summarize impaired loans (including accruing TDRs) as of September 30, 2016 and December 31, 2015 . Impaired Loans (including accruing TDRs) September 30, 2016 Nine Months Ended September 30, 2016 Three Months Ended (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 Investment properties $ 996 1,032 — 6,901 — 3,158 — 1-4 family properties 1,880 5,876 — 1,328 — 1,150 — Land acquisition 920 4,360 — 3,644 — 2,070 — Total commercial real estate 3,796 11,268 — 11,873 — 6,378 — Commercial, financial and agricultural 4,015 5,406 — 5,276 — 4,351 — Owner-occupied 10,896 11,907 — 8,182 — 7,223 — Total commercial and industrial 14,911 17,313 — 13,458 — 11,574 — Home equity lines 1,051 1,051 — 1,043 — 1,051 — Consumer mortgages 814 2,065 — 814 — 814 — Credit cards — — — — — — — Other retail loans — — — — — — — Total retail 1,865 3,116 — 1,857 — 1,865 — Total impaired loans with no related allowance recorded $ 20,572 31,697 — 27,188 — 19,817 — With allowance recorded Investment properties $ 37,634 37,639 3,004 45,536 1,364 38,125 342 1-4 family properties 47,139 47,146 7,394 49,496 822 49,079 361 Land acquisition 14,268 14,268 668 17,842 349 14,095 126 Total commercial real estate 99,041 99,053 11,066 112,874 2,535 101,299 829 Commercial, financial and agricultural 47,881 50,357 9,736 53,618 863 51,820 346 Owner-occupied 55,650 55,870 1,738 51,565 1,419 53,935 492 Total commercial and industrial 103,531 106,227 11,474 105,183 2,282 105,755 838 Home equity lines 10,433 10,433 963 9,563 766 9,870 254 Consumer mortgages 20,571 20,571 610 21,259 332 20,817 108 Credit cards — — — — — — — Other retail loans 4,951 4,951 151 5,108 222 5,455 79 Total retail 35,955 35,955 1,724 35,930 1,320 36,142 441 Total impaired loans with allowance recorded $ 238,527 241,235 24,264 253,987 6,137 243,196 2,108 Total impaired loans Investment properties $ 38,630 38,671 3,004 52,437 1,364 41,283 342 1-4 family properties 49,019 53,022 7,394 50,824 822 50,229 361 Land acquisition 15,188 18,628 668 21,486 349 16,165 126 Total commercial real estate 102,837 110,321 11,066 124,747 2,535 107,677 829 Commercial, financial and agricultural 51,896 55,763 9,736 58,894 863 56,171 346 Owner-occupied 66,546 67,777 1,738 59,747 1,419 61,158 492 Total commercial and industrial 118,442 123,540 11,474 118,641 2,282 117,329 838 Home equity lines 11,484 11,484 963 10,606 766 10,921 254 Consumer mortgages 21,385 22,636 610 22,073 332 21,631 108 Credit cards — — — — — — — Other retail loans 4,951 4,951 151 5,108 222 5,455 79 Total retail 37,820 39,071 1,724 37,787 1,320 38,007 441 Total impaired loans $ 259,099 272,932 24,264 281,175 6,137 263,013 2,108 Impaired Loans (including accruing TDRs) December 31, 2015 Year Ended December 31, 2015 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded Investment properties $ 10,051 12,946 — 11,625 — 1-4 family properties 1,507 5,526 — 2,546 — Land acquisition 8,551 39,053 — 13,897 — Total commercial real estate 20,109 57,525 — 28,068 — Commercial, financial and agricultural 4,393 7,606 — 5,737 — Owner-occupied 8,762 11,210 — 14,657 — Total commercial and industrial 13,155 18,816 — 20,394 — Home equity lines 1,030 1,030 — 573 — Consumer mortgages 814 941 — 995 — Credit cards — — — — — Other retail loans — — — — — Total retail 1,844 1,971 — 1,568 — Total impaired loans with no related allowance recorded $ 35,108 78,312 — 50,030 — With allowance recorded Investment properties $ 62,305 62,305 10,070 73,211 2,131 1-4 family properties 51,376 51,376 6,184 61,690 1,618 Land acquisition 24,168 24,738 2,715 34,793 936 Total commercial real estate 137,849 138,419 18,969 169,694 4,685 Commercial, financial and agricultural 42,914 44,374 8,339 43,740 1,125 Owner-occupied 49,530 49,688 2,138 55,323 1,814 Total commercial and industrial 92,444 94,062 10,477 99,063 2,939 Home equity lines 9,575 9,575 206 8,318 346 Consumer mortgages 22,173 23,297 651 26,044 1,229 Credit cards — — — — — Other retail loans 4,651 4,651 132 5,105 323 Total retail 36,399 37,523 989 39,467 1,898 Total impaired loans with allowance recorded $ 266,692 270,004 30,435 308,224 9,522 Total impaired loans Investment properties $ 72,356 75,251 10,070 84,836 2,131 1-4 family properties 52,883 56,902 6,184 64,236 1,618 Land acquisition 32,719 63,791 2,715 48,690 936 Total commercial real estate 157,958 195,944 18,969 197,762 4,685 Commercial, financial and agricultural 47,307 51,980 8,339 49,477 1,125 Owner-occupied 58,292 60,898 2,138 69,980 1,814 Total commercial and industrial 105,599 112,878 10,477 119,457 2,939 Home equity lines 10,605 10,605 206 8,891 346 Consumer mortgages 22,987 24,238 651 27,039 1,229 Credit cards — — — — — Other retail loans 4,651 4,651 132 5,105 323 Total retail 38,243 39,494 989 41,035 1,898 Total impaired loans $ 301,800 348,316 30,435 358,254 9,522
Troubled Debt Restructurings	The following tables represent, by concession type, the post-modification balance for loans modified or renewed during the nine and three months ended September 30, 2016 and 2015 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Nine Months Ended September 30, 2016 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 4 $ — 1,826 3,518 5,344 1-4 family properties 23 — 3,703 1,211 4,914 Land acquisition 13 — — 1,766 1,766 Total commercial real estate 40 — 5,529 6,495 12,024 Commercial, financial and agricultural 50 — 13,948 5,232 19,180 Owner-occupied 7 — 5,458 550 6,008 Total commercial and industrial 57 — 19,406 5,782 25,188 Home equity lines 5 — 224 123 347 Consumer mortgages 6 — 354 51 405 Credit cards — — — — — Other retail loans 24 — 394 1,828 2,222 Total retail 35 — 972 2,002 2,974 Total TDRs 132 $ — 25,907 14,279 40,186 (1 ) Three Months Ended September 30, 2016 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 1 $ — — 3,370 3,370 1-4 family properties 4 — 213 47 260 Land acquisition 2 — — 497 497 Total commercial real estate 7 — 213 3,914 4,127 Commercial, financial and agricultural 5 — — 387 387 Owner-occupied 1 — 2,791 — 2,791 Total commercial and industrial 6 — 2,791 387 3,178 Home equity lines 2 — — 123 123 Consumer mortgages — — — — — Credit cards — — — — — Other retail loans 7 — 70 294 364 Total retail 9 — 70 417 487 Total TDRs 22 $ — 3,074 4,718 7,792 (2 ) (1) No net charge-offs were recorded during the nine months ended September 30, 2016 upon restructuring of these loans. (2) No net charge-offs were recorded during the three months ended September 30, 2016 upon restructuring of these loans. TDRs by Concession Type Nine Months Ended September 30, 2015 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 5 $ — 16,932 6,905 23,837 1-4 family properties 31 14,823 4,078 1,774 20,675 Land acquisition 8 — 604 1,187 1,791 Total commercial real estate 44 14,823 21,614 9,866 46,303 Commercial, financial and agricultural 71 — 3,094 5,455 8,549 Owner-occupied 7 — 1,739 1,314 3,053 Total commercial and industrial 78 — 4,833 6,769 11,602 Home equity lines 53 — 2,826 2,905 5,731 Consumer mortgages 12 — 510 786 1,296 Credit cards — — — — — Other retail loans 20 — 259 634 893 Total retail 85 — 3,595 4,325 7,920 Total TDRs 207 $ 14,823 30,042 20,960 65,825 (3 ) Three Months Ended September 30, 2015 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 1 $ — — 3,090 3,090 1-4 family properties 10 — 721 895 1,616 Land acquisition 2 — — 368 368 Total commercial real estate 13 — 721 4,353 5,074 Commercial, financial and agricultural 22 — 1,514 1,611 3,125 Owner-occupied 4 — — 898 898 Total commercial and industrial 26 — 1,514 2,509 4,023 Home equity lines 5 — 309 757 1,066 Consumer mortgages — — — — — Credit cards — — — — — Other retail loans 7 — 2 139 141 Total retail 12 — 311 896 1,207 Total TDRs 51 $ — 2,546 7,758 10,304 (4 ) (3) Net charge-offs of $4.0 million were recorded during the nine months ended September 30, 2015 upon restructuring of these loans. (4) No net charge-offs were recorded during the three months ended September 30, 2015 upon restructuring of these loans.

Other Comprehensive Income (L25

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2016
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 nine and three months ended September 30, 2016 and 2015 . 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, 2015 $ (12,504 ) (18,222 ) 907 (29,819 ) Other comprehensive income before reclassifications — 34,827 63 34,890 Amounts reclassified from accumulated other comprehensive income (loss) 247 (77 ) (76 ) 94 Net current period other comprehensive income 247 34,750 (13 ) 34,984 Balance as of September 30, 2016 $ (12,257 ) 16,528 894 5,165 Balance as of July 1, 2016 $ (12,297 ) 22,459 843 11,005 Other comprehensive income before reclassifications — (5,895 ) 63 (5,832 ) Amounts reclassified from accumulated other comprehensive income (loss) 40 (36 ) (12 ) (8 ) Net current period other comprehensive income 40 (5,931 ) 51 (5,840 ) Balance as of September 30, 2016 $ (12,257 ) 16,528 894 5,165 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, 2014 $ (12,824 ) (713 ) 932 (12,605 ) Other comprehensive income before reclassifications — 7,941 143 8,084 Amounts reclassified from accumulated other comprehensive income (loss) 206 (1,667 ) (110 ) (1,571 ) Net current period other comprehensive income 206 6,274 33 6,513 Balance as of September 30, 2015 $ (12,618 ) 5,561 965 (6,092 ) Balance as of July 1, 2015 $ (12,687 ) (10,659 ) 1,023 (22,323 ) Other comprehensive income (loss) before reclassifications — 16,220 — 16,220 Amounts reclassified from accumulated other comprehensive income (loss) 69 — (58 ) 11 Net current period other comprehensive income (loss) 69 16,220 (58 ) 16,231 Balance as of September 30, 2015 $ (12,618 ) 5,561 965 (6,092 )
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 Nine Months Ended September 30, 2016 2015 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ (205 ) (336 ) Interest expense Amortization of deferred losses (197 ) — Loss on early extinguishment of debt 155 130 Income tax (expense) benefit $ (247 ) (206 ) Reclassifications, net of income taxes Net unrealized gains (losses) on investment securities available for sale: Realized gain on sale of securities $ 126 2,710 Investment securities gains, net (49 ) (1,043 ) Income tax (expense) benefit $ 77 1,667 Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 124 178 Salaries and other personnel expense (48 ) (68 ) Income tax (expense) benefit $ 76 110 Reclassifications, net of income taxes 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 Three Months Ended September 30, 2016 2015 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ (65 ) (112 ) Interest expense 25 43 Income tax (expense) benefit $ (40 ) (69 ) Reclassifications, net of income taxes Net unrealized gains (losses) on investment securities available for sale: Realized gain on sale of securities $ 59 — Investment securities gains, net (23 ) — Income tax (expense) benefit $ 36 — Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 20 94 Salaries and other personnel expense (8 ) (36 ) Income tax (expense) benefit $ 12 58 Reclassifications, net of income taxes

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	9 Months Ended
	Sep. 30, 2016
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 September 30, 2016 and December 31, 2015 , according to the valuation hierarchy included in ASC 820-10. For equity and debt securities, class was determined based on the nature and risks of the investments. Transfers between levels during the nine and three months ended September 30, 2016 and year ended December 31, 2015 were inconsequential. September 30, 2016 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities 2,371 2,371 Mortgage-backed securities issued by U.S. Government agencies — 2,380 — 2,380 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 1,860 — 1,860 State and municipal securities — 698 — 698 Total trading securities $ — 7,309 — 7,309 Mortgage loans held for sale — 95,769 — 95,769 Investment securities available for sale: U.S. Treasury securities 74,512 — — 74,512 U.S. Government agency securities — 13,143 — 13,143 Mortgage-backed securities issued by U.S. Government agencies — 185,151 — 185,151 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,422,656 — 2,422,656 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 876,109 — 876,109 State and municipal securities — 2,899 — 2,899 Equity securities 8,647 — — 8,647 Other investments (1) 3,172 15,091 1,773 20,036 Total investment securities available for sale $ 86,331 3,515,049 1,773 3,603,153 Private equity investments — — 25,992 25,992 Mutual funds held in rabbi trusts 11,206 — — 11,206 Derivative assets: Interest rate contracts — 32,336 — 32,336 Mortgage derivatives (2) — 2,407 — 2,407 Total derivative assets $ — 34,743 — 34,743 Liabilities Trading account liabilities — 5,666 — 5,666 Derivative liabilities: Interest rate contracts — 32,747 — 32,747 Mortgage derivatives (2) — 659 — 659 Visa derivative — — 1,415 1,415 Total derivative liabilities $ — 33,406 1,415 34,821 December 31, 2015 (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 — 2,922 — 2,922 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 1,078 — 1,078 State and municipal securities — 1,097 — 1,097 Total trading securities $ — 5,097 — 5,097 Mortgage loans held for sale — 59,275 — 59,275 Investment securities available for sale: U.S. Treasury securities 43,357 — — 43,357 U.S. Government agency securities — 13,623 — 13,623 Securities issued by U.S. Government sponsored enterprises — 126,909 — 126,909 Mortgage-backed securities issued by U.S. Government agencies — 210,004 — 210,004 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,630,419 — 2,630,419 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 529,597 — 529,597 State and municipal securities — 4,434 — 4,434 Equity securities 9,672 — — 9,672 Other investments (1) 3,073 14,985 1,745 19,803 Total investment securities available for sale $ 56,102 3,529,971 1,745 3,587,818 Private equity investments — 870 27,148 28,018 Mutual funds held in rabbi trusts 10,664 — — 10,664 Derivative assets: Interest rate contracts — 25,580 — 25,580 Mortgage derivatives (2) — 1,559 — 1,559 Total derivative assets $ — 27,139 — 27,139 Liabilities Trading account liabilities — 1,032 — 1,032 Derivative liabilities: Interest rate contracts — 26,030 — 26,030 Visa derivative — — 1,415 1,415 Total derivative liabilities $ — 26,030 1,415 27,445 (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.
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 Nine Months Ended September 30, For the Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Mortgage loans held for sale $ 1,762 450 $ (87 ) 1,012 Mortgage Loans Held for Sale (in thousands) As of September 30, 2016 As of December 31, 2015 Fair value $ 95,769 59,275 Unpaid principal balance 92,910 58,177 Fair value less aggregate unpaid principal balance $ 2,859 1,098
Changes in Level 3 Fair Value Measurements	The table below includes a roll-forward of the amounts on the consolidated balance sheet for the nine and three months ended September 30, 2016 and 2015 (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 nine and three months ended September 30, 2016 and 2015 , Synovus did not have any transfers between levels in the fair value hierarchy. Nine Months Ended September 30, 2016 2015 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Investment Securities Available for Sale Private Equity Investments Visa Derivative Beginning balance, January 1, $ 1,745 27,148 (1,415 ) 1,645 27,367 (1,401 ) Total gains (losses) realized/unrealized: Included in earnings — (527 ) (1,080 ) — (517 ) (1,092 ) Unrealized gains (losses) included in other comprehensive income 28 — — (114 ) — — Purchases — — — — — — Sales — — — — — — Issuances — — — — — — Settlements — (629 ) 1,080 — — 1,078 Amortization of discount/premium — — — — — — Transfers in and/or out of Level 3 — — — — — — Ending balance, September 30, $ 1,773 25,992 (1,415 ) 1,531 26,850 (1,415 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30, $ — (527 ) (1,080 ) — (517 ) (1,092 ) Three Months Ended September 30, 2016 2015 (in thousands) Investment Securities Available for Sale Private Equity Investments Visa Derivative Investment Securities Available for Sale Private Equity Investments Visa Derivative Beginning balance, July 1, $ 1,625 26,866 (1,415 ) 1,700 26,959 (1,415 ) Total gains (losses) realized/unrealized: Included in earnings — (249 ) (360 ) — (109 ) (363 ) Unrealized gains (losses) included in other comprehensive income 148 — — (169 ) — — Settlements — (625 ) 360 — — 363 Ending balance, September 30, $ 1,773 25,992 (1,415 ) 1,531 26,850 (1,415 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30, $ — (249 ) (360 ) — (109 ) (363 )
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 period. September 30, 2016 December 31, 2015 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans * $ — — 5,952 5,952 — — 11,264 11,264 Other loans held for sale — — 2,474 2,474 — — 425 425 Other real estate — — 11,036 11,036 — — 23,519 23,519 Other assets held for sale $ — — 7,094 7,094 — — 3,425 3,425
Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents fair value adjustments recognized in earnings for the nine and three months ended September 30, 2016 and 2015 for the assets measured at fair value on a non-recurring basis. Nine Months Ended September 30, Three Months Ended September 30, (in thousands) 2016 2015 2016 2015 Impaired loans * $ 1,329 3,549 59 1,789 Other loans held for sale 2,096 — 2,096 — Other real estate 2,405 7,405 968 2,645 Other assets held for sale 7,532 1,043 907 1,043 * Collateral-dependent impaired loans that were written down to collateral value during the period.
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. September 30, 2016 December 31, 2015 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 or contracted sales price Discount to appraised value (2) Estimated selling costs 0% - 52% (11%) 0% - 10% (7%) 0%-80% (29%) 0%-10% (7%) Other loans held for sale Third-party appraised value of collateral less estimated selling costs or contracted sales price Discount to appraised value (2) Estimated selling costs 0%-13% (13%) 0%-10% (7%) 0%-3% (3%) 0%-10% (7%) Other real estate Third-party appraised value of real estate less estimated selling costs or contracted sales price Discount to appraised value (2) Estimated selling costs 0% - 10% (6%) 0% - 10% (7%) 0%-20% (7%) 0%-10% (7%) Other assets held for sale Third-party appraised value of real estate or other asset less estimated selling costs or BOV Discount to appraised value (2) Estimated selling costs 0%-71% (41%) 0%-10% (7%) 0%-35% (31%) 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. 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. September 30, 2016 December 31, 2015 Valuation Technique Significant Unobservable Input Range (Weighted Average) (1) Range (Weighted Average) (1) Assets 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 438 bps 477 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 N/A N/A Discount for lack of liquidity (2) 15% 15% Visa derivative liability Internal valuation Estimated future cumulative deposits to the litigation escrow for settlement of the Covered Litigation, and estimated future monthly fees payable to the derivative counterparty N/A N/A (1) The range represents management's best estimate of the high and low of the value that would be assigned to a particular input. (2) Represents management's estimate of discount that market participants would require based on the instrument's lack of liquidity.
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 September 30, 2016 and December 31, 2015 are as follows: September 30, 2016 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 367,342 367,342 367,342 — — Interest bearing funds with Federal Reserve Bank 985,776 985,776 985,776 — — Interest earning deposits with banks 18,375 18,375 18,375 — — Federal funds sold and securities purchased under resale agreements 71,753 71,753 71,753 — — Trading account assets 7,309 7,309 — 7,309 — Mortgage loans held for sale 95,769 95,769 — 95,769 — Other loans held for sale 2,474 2,474 2,474 Investment securities available for sale 3,603,153 3,603,153 86,331 3,515,049 1,773 Private equity investments 25,992 25,992 — — 25,992 Mutual funds held in rabbi trusts 11,206 11,206 11,206 — — Loans, net of deferred fees and costs 23,262,887 22,991,371 — — 22,991,371 Derivative assets 34,743 34,743 — 34,743 — Financial liabilities Trading account liabilities 5,666 5,666 — 5,666 — Non-interest bearing deposits 7,059,059 7,059,059 — 7,059,059 — Interest bearing deposits 17,132,944 17,125,098 — 17,125,098 — Federal funds purchased and securities sold under repurchase agreements 195,025 195,025 195,025 — — Long-term debt 2,160,985 2,233,257 — 2,233,257 — Derivative liabilities $ 34,821 34,821 — 33,406 1,415 December 31, 2015 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 367,092 367,092 367,092 — — Interest bearing funds with Federal Reserve Bank 829,887 829,887 829,887 — — Interest earning deposits with banks 17,387 17,387 17,387 — — Federal funds sold and securities purchased under resale agreements 69,819 69,819 69,819 — — Trading account assets 5,097 5,097 5,097 — Mortgage loans held for sale 59,275 59,275 59,275 — Other loans held for sale 425 425 — — 425 Investment securities available for sale 3,587,818 3,587,818 56,102 3,529,971 1,745 Private equity investments 28,018 28,018 — 870 27,148 Mutual funds held in rabbi trusts 10,664 10,664 10,664 — — Loans, net of deferred fees and costs 22,429,565 22,192,903 — — 22,192,903 Derivative assets 27,139 27,139 — 27,139 — Financial liabilities Trading account liabilities 1,032 1,032 — 1,032 — Non-interest bearing deposits 6,732,970 6,732,970 — 6,732,970 — Interest bearing deposits 16,509,691 16,516,222 — 16,516,222 — Federal funds purchased and securities sold under repurchase agreements 177,025 177,025 177,025 — — Long-term debt 2,186,893 2,244,376 — 2,244,376 — Derivative liabilities $ 27,445 27,445 — 26,030 1,415

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Summary of Derivative Instruments [Abstract]
Impact of Derivatives on Balance Sheet	The impact of derivative instruments on the consolidated balance sheets at September 30, 2016 and December 31, 2015 is presented below. Fair Value of Derivative Assets Fair Value of Derivative Liabilities (in thousands) Location on Consolidated Balance Sheet September 30, 2016 December 31, 2015 Location on Consolidated Balance Sheet September 30, 2016 December 31, 2015 Derivatives not designated as hedging instruments: Interest rate contracts Other assets $ 32,336 25,580 Other liabilities 32,747 26,030 Mortgage derivatives Other assets 2,407 1,559 Other liabilities 659 — Visa derivative — — Other liabilities 1,415 1,415 Total derivatives not designated as hedging instruments $ 34,743 27,139 34,821 27,445
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 nine and three months ended September 30, 2016 is presented below. Location of Gain (Loss) Recognized in Income Gain (Loss) Recognized in Income (in thousands) Nine Months Ended September 30, Derivatives not designated as hedging instruments 2016 2015 Interest rate contracts (1) Other non-interest income $ 39 10 Mortgage derivatives (2) Mortgage banking income 189 276 Total $ 228 286 Gain (Loss) Recognized in Income (in thousands) Three Months Ended September 30, Derivatives not designated as hedging instruments Location of Gain (Loss) Recognized in Income 2016 2015 Interest rate contracts (1) Other non-interest income $ 5 170 Mortgage derivatives (2) Mortgage banking income 674 (1,955 ) Total $ 679 (1,785 ) (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)	9 Months Ended
	Sep. 30, 2016
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 nine and three months ended September 30, 2016 . Nine Months Ended September 30, Three Months Ended September 30, (in thousands, except per share data) 2016 2015 2016 2015 Basic Net Income Per Common Share: Net income available to common shareholders $ 170,555 160,006 $ 62,686 55,369 Weighted average common shares outstanding 125,076 133,120 122,924 131,516 Net income per common share, basic $ 1.36 1.20 0.51 0.42 Diluted Net Income Per Common Share: Net income available to common shareholders $ 170,555 160,006 $ 62,686 55,369 Weighted average common shares outstanding 125,076 133,120 122,924 131,516 Potentially dilutive shares from outstanding equity-based awards 636 756 680 781 Weighted average diluted common shares 125,712 133,876 123,604 132,297 Net income per common share, diluted $ 1.36 1.20 0.51 0.42

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Loan Commitments and Letters of Credit	Unfunded lending commitments and letters of credit at September 30, 2016 and December 31, 2015 are presented below. (in thousands) September 30, 2016 December 31, 2015 Letters of credit* $ 159,041 166,936 Commitments to fund commercial real estate, construction, and land development loans 1,525,451 1,882,130 Unused credit card lines 1,093,049 1,055,181 Commitments under home equity lines of credit 1,095,322 1,051,386 Commitments to fund commercial and industrial loans 4,169,740 4,094,809 Other loan commitments 403,222 284,706 Total unfunded lending commitments and letters of credit $ 8,445,825 8,535,148 * Represents the contractual amount net of risk participations of $82 million and $66 million at September 30, 2016 and December 31, 2015, respectively.

Significant Accounting Polici30

Significant Accounting Policies (Details)	Sep. 30, 2016USD ($)BanksATMbranches	Dec. 31, 2015USD ($)
Basis Of Presentation [Line Items]
Number of bank divisions | Banks	28
Number of branches | branches	250
Number of ATMs | ATM	332
Cash and Cash Equivalents [Member]
Basis Of Presentation [Line Items]
Total deposits	$ 33,000	$ 100,000
Cash and cash equivalents	135,100,000	117,300,000
Interest earning deposits with banks	5,600,000	2,200,000
Federal funds sold	$ 71,000,000	$ 65,900,000

Significant Accounting Polici31

Significant Accounting Policies Significant Accounting Policies (Subsequent Events) (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Sep. 30, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Assets		$ 29,727,096	$ 28,792,653
Subsequent Event [Member] | Entaire Global Companies, Inc. (Entaire) [Member]
Subsequent Event [Line Items]
Assets	$ 370,000
Subsequent Event [Member] | Entaire Global Companies, Inc. (Entaire) [Member] | Loans Receivable [Member]
Subsequent Event [Line Items]
Assets	357,000
Subsequent Event [Member] | Entaire Global Companies, Inc. (Entaire) [Member]
Subsequent Event [Line Items]
Payments to acquire businesses	$ 30,000
Subsequent Event [Member] | Entaire Global Companies, Inc. (Entaire) [Member] | Minimum [Member]
Subsequent Event [Line Items]
Potential additional payments based on earnings, period	3 years
Subsequent Event [Member] | Entaire Global Companies, Inc. (Entaire) [Member] | Maximum [Member]
Subsequent Event [Line Items]
Potential additional payments based on earnings, period	5 years

Share Repurchase Programs (Deta

Share Repurchase Programs (Details) - Accelerated Share Repurchase Program [Member] - USD ($)	Sep. 29, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2016
Equity, Class of Treasury Stock [Line Items]
Authorized amount						$ 300,000,000
Stock repurchase program expiration date						15 months
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Shares repurchased	1,200,000	2,600,000	2,000,000	3,900,000	1,200,000		9,700,000
Repurchased amount		$ 80,900,000	$ 60,500,000	$ 110,900,000	$ 37,100,000		$ 289,400,000
Shares repurchased, average cost per share	$ 31.87						$ 29.78
Remaining authorized repurchase amount	$ 50,000,000

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Millions	Sep. 30, 2016USD ($)securities	Dec. 31, 2015USD ($)
Investments [Abstract]
Pledged to secure deposits | $	$ 2,010	$ 2,430
Investment securities in a loss position for less than twelve months	16
Investment securities in a loss position for twelve months or longer	4

Investment Securities (Summary

Investment Securities (Summary Of Available For Sale Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 3,554,611	$ 3,595,798
Gross Unrealized Gains	50,395	19,303
Gross Unrealized Losses	(1,853)	(27,283)
Fair Value	3,603,153	3,587,818
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	73,758	43,125
Gross Unrealized Gains	754	232
Gross Unrealized Losses	0	0
Fair Value	74,512	43,357
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,728	13,087
Gross Unrealized Gains	415	536
Gross Unrealized Losses	0	0
Fair Value	13,143	13,623
Securities Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	126,520
Gross Unrealized Gains	0	389
Gross Unrealized Losses	0	0
Fair Value	0	126,909
Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	181,772	209,785
Gross Unrealized Gains	3,481	1,340
Gross Unrealized Losses	(102)	(1,121)
Fair Value	185,151	210,004
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,391,778	2,645,107
Gross Unrealized Gains	31,624	7,874
Gross Unrealized Losses	(746)	(22,562)
Fair Value	2,422,656	2,630,419
Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	868,723	530,426
Gross Unrealized Gains	8,108	2,396
Gross Unrealized Losses	(722)	(3,225)
Fair Value	876,109	529,597
State And Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,870	4,343
Gross Unrealized Gains	30	92
Gross Unrealized Losses	(1)	(1)
Fair Value	2,899	4,434
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,755	3,228
Gross Unrealized Gains	5,892	6,444
Gross Unrealized Losses	0	0
Fair Value	8,647	9,672
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,227	20,177
Gross Unrealized Gains	91	0
Gross Unrealized Losses	(282)	(374)
Fair Value	$ 20,036	$ 19,803

Investment Securities (Schedule

Investment Securities (Schedule Of Unrealized Loss On Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 556,916	$ 1,990,616
Less than 12 Months, Unrealized Losses	1,267	14,491
12 Months or Longer, Fair Value	35,526	585,640
12 Months or Longer, Unrealized Losses	586	12,792
Total Fair Value, Fair Value	592,442	2,576,256
Total Fair Value, Unrealized Losses	1,853	27,283
Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	8,058	122,626
Less than 12 Months, Unrealized Losses	61	639
12 Months or Longer, Fair Value	3,961	18,435
12 Months or Longer, Unrealized Losses	41	482
Total Fair Value, Fair Value	12,019	141,061
Total Fair Value, Unrealized Losses	102	1,121
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	351,518	1,656,194
Less than 12 Months, Unrealized Losses	746	12,874
12 Months or Longer, Fair Value	0	489,971
12 Months or Longer, Unrealized Losses	0	9,688
Total Fair Value, Fair Value	351,518	2,146,165
Total Fair Value, Unrealized Losses	746	22,562
Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	197,340	196,811
Less than 12 Months, Unrealized Losses	460	963
12 Months or Longer, Fair Value	26,566	72,366
12 Months or Longer, Unrealized Losses	262	2,262
Total Fair Value, Fair Value	223,906	269,177
Total Fair Value, Unrealized Losses	722	3,225
State And Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or Longer, Fair Value	54	50
12 Months or Longer, Unrealized Losses	1	1
Total Fair Value, Fair Value	54	50
Total Fair Value, Unrealized Losses	1	1
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	0	14,985
Less than 12 Months, Unrealized Losses	0	15
12 Months or Longer, Fair Value	4,945	4,818
12 Months or Longer, Unrealized Losses	282	359
Total Fair Value, Fair Value	4,945	19,803
Total Fair Value, Unrealized Losses	$ 282	$ 374

Investment Securities (Amortize

Investment Securities (Amortized Cost And Estimated Fair Value By Contractual Maturity Of Investment Securities Available For Sale) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	$ 19,933
1 to 5 Years, Amortized Cost	61,491
5 to 10 Years, Amortized Cost	983,131
More Than 10 years, Amortized Cost	2,484,074
No Stated Maturity, Amortized Cost	5,982
Total, Amortized Cost	3,554,611
Within One Year, Fair Value	19,968
1 to 5 Years, Fair Value	62,400
5 to 10 Years, Fair Value	994,497
More Than 10 years, Fair Value	2,514,470
No Stated Maturity, Fair Value	11,818
Total, Fair Value	3,603,153
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	18,770
1 to 5 Years, Amortized Cost	54,988
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	73,758
Within One Year, Fair Value	18,770
1 to 5 Years, Fair Value	55,742
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	0
Total, Fair Value	74,512
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	999
1 to 5 Years, Amortized Cost	5,929
5 to 10 Years, Amortized Cost	5,800
More Than 10 years, Amortized Cost	0
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	12,728
Within One Year, Fair Value	1,034
1 to 5 Years, Fair Value	6,071
5 to 10 Years, Fair Value	6,038
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	0
Total, Fair Value	13,143
Securities Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	0
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	0
Total, Fair Value	0
Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	15,175
More Than 10 years, Amortized Cost	166,597
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	181,772
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	15,568
More Than 10 years, Fair Value	169,583
No Stated Maturity, Fair Value	0
Total, Fair Value	185,151
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	334
5 to 10 Years, Amortized Cost	947,156
More Than 10 years, Amortized Cost	1,444,288
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	2,391,778
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	345
5 to 10 Years, Fair Value	957,800
More Than 10 years, Fair Value	1,464,511
No Stated Maturity, Fair Value	0
Total, Fair Value	2,422,656
Collateralized Mortgage-Backed Securities Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	868,723
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	868,723
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	876,109
No Stated Maturity, Fair Value	0
Total, Fair Value	876,109
State And Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	164
1 to 5 Years, Amortized Cost	240
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	2,466
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	2,870
Within One Year, Fair Value	164
1 to 5 Years, Fair Value	242
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	2,493
No Stated Maturity, Fair Value	0
Total, Fair Value	2,899
Securities With No Stated Maturity (Equity Securities) [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost
No Stated Maturity, Amortized Cost	2,755
Total, Amortized Cost	2,755
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	8,647
Total, Fair Value	8,647
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
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
No Stated Maturity, Amortized Cost	3,227
Total, Amortized Cost	20,227
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	15,091
More Than 10 years, Fair Value	1,774
No Stated Maturity, Fair Value	3,171
Total, Fair Value	$ 20,036

Investment Securities (Summar37

Investment Securities (Summary Of Sales Transactions In The Investment Securities Available For Sale Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments [Abstract]
Proceeds from sales of investment securities available for sale	$ 353,215	$ 0	$ 596,824	$ 82,156
Gross realized gains	1,635	0	2,590	2,710
Gross realized losses	(1,576)	0	(2,464)	0
Investment securities gains, net	$ 59	$ 0	$ 126	$ 2,710

Restructuring Charges (Narrativ

Restructuring Charges (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2016USD ($)branches	Sep. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Sep. 30, 2016USD ($)branches	Sep. 30, 2015USD ($)	Dec. 31, 2016branches
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,243	$ 69		$ 8,225	$ (33)
Asset impairment charges	$ 1,240	$ 229		$ 8,107	229
Number of branches | branches	250			250
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 4,800	341
Asset impairment charges	$ 267		$ 973
Number of branches for closure | branches				9
Number of branches closed | branches				7
Business exit costs				$ 3,300
Gain on disposition of certain branch locations					$ 374
Facility Closing [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Number of branches | branches						248
Decrease in number of branches, percent						23.20%

Restructuring Charges (Schedule

Restructuring Charges (Schedule Of Restructuring And Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Charges [Abstract]
Lease termination charges	$ (25)	$ 0	$ 6	$ (4)
Asset impairment charges	1,240	229	8,107	229
Loss (gain) on sale of assets held for sale, net	0	(217)	13	(374)
Professional fees and other charges	28	57	99	116
Total restructuring charges, net	$ 1,243	$ 69	$ 8,225	$ (33)

Restructuring Charges (Restruct

Restructuring Charges (Restructuring Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
Beginning balance	$ 4,968	$ 7,377	$ 6,617	$ 8,830
Accruals for efficiency initiatives	(25)	0	6	(4)
Payments	(555)	(418)	(2,235)	(1,867)
Ending balance	4,388	6,959	4,388	6,959
Severance Charges [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	593	2,253	1,930	3,291
Accruals for efficiency initiatives	0	0	0	0
Payments	(365)	(221)	(1,702)	(1,259)
Ending balance	228	2,032	228	2,032
Lease Termination Charges [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	4,375	5,124	4,687	5,539
Accruals for efficiency initiatives	(25)	0	6	(4)
Payments	(190)	(197)	(533)	(608)
Ending balance	$ 4,160	$ 4,927	$ 4,160	$ 4,927

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses (Narrative) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract	Dec. 31, 2015USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average recorded investment in impaired loans	$ 263,013,000	$ 323,500,000	$ 281,175,000	$ 375,500,000	$ 358,254,000
Interest income recognized	2,108,000		6,137,000	0	9,522,000
Interest income recognized for accruing TDRs		$ 2,200,000		$ 7,300,000
Non-accrual status	$ 57,200,000		$ 57,200,000		77,900,000
Number of contracts | Contract	1	2	2	4
Allowance for loan losses	$ 253,817,000	$ 250,900,000	$ 253,817,000	$ 250,900,000	252,496,000	$ 255,076,000	$ 254,702,000	$ 261,317,000
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loan substandard period (in days)			90 days
Loss And Charged Off [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loans downgraded to loss (in days)			120 days
Accruing TDRs With Modifications And Renewals Completed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing troubled debt restructuring	201,900,000		$ 201,900,000		223,900,000
Allowance for loan losses	11,800,000		11,800,000		$ 12,600,000
Accruing TDRs With Modifications And Renewals Completed [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial-type impaired loans			1,000,000
Troubled Debt Restructurings That Subsequently Defaulted [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Post-default balance for modifications classified as TDRs	$ 89,000	$ 478,000	$ 181,000	$ 593,000

Loans and Allowance for Loan 42

Loans and Allowance for Loan Losses (Schedule Of Current, Accruing Past Due And Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	$ 23,079,147	$ 22,243,382
Accruing 30-89 Days Past Due	56,423	45,291
Accruing 90 Days or Greater Past Due	5,358	2,621
Total Accruing Past Due	61,781	47,912
Non-accrual	148,155	168,370
Total loans	23,289,083	22,459,664	$ 21,892,676
Deferred fees and costs, net	26,200	30,100	$ 28,400
Commercial Real Estate [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	7,420,043	7,327,763
Accruing 30-89 Days Past Due	10,534	9,223
Accruing 90 Days or Greater Past Due	2,293	135
Total Accruing Past Due	12,827	9,358
Non-accrual	32,708	57,647
Total loans	7,465,578	7,394,768
Investment Properties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	5,957,788	5,726,307
Accruing 30-89 Days Past Due	2,501	2,284
Accruing 90 Days or Greater Past Due	293	0
Total Accruing Past Due	2,794	2,284
Non-accrual	8,884	23,040
Total loans	5,969,466	5,751,631
1-4 Family Properties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,047,830	1,105,914
Accruing 30-89 Days Past Due	5,355	6,300
Accruing 90 Days or Greater Past Due	717	103
Total Accruing Past Due	6,072	6,403
Non-accrual	17,152	16,839
Total loans	1,071,054	1,129,156
Land Acquisition [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	414,425	495,542
Accruing 30-89 Days Past Due	2,678	639
Accruing 90 Days or Greater Past Due	1,283	32
Total Accruing Past Due	3,961	671
Non-accrual	6,672	17,768
Total loans	425,058	513,981
Commercial and Industrial [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	10,917,450	10,684,344
Accruing 30-89 Days Past Due	26,132	17,476
Accruing 90 Days or Greater Past Due	1,095	880
Total Accruing Past Due	27,227	18,356
Non-accrual	71,317	69,430
Total loans	11,015,994	10,772,130
Commercial, Financial and Agricultural [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	6,475,826	6,391,036
Accruing 30-89 Days Past Due	17,987	12,222
Accruing 90 Days or Greater Past Due	942	785
Total Accruing Past Due	18,929	13,007
Non-accrual	49,874	49,137
Total loans	6,544,629	6,453,180
Owner-Occupied [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	4,441,624	4,293,308
Accruing 30-89 Days Past Due	8,145	5,254
Accruing 90 Days or Greater Past Due	153	95
Total Accruing Past Due	8,298	5,349
Non-accrual	21,443	20,293
Total loans	4,471,365	4,318,950
Retail [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	4,741,654	4,231,275
Accruing 30-89 Days Past Due	19,757	18,592
Accruing 90 Days or Greater Past Due	1,970	1,606
Total Accruing Past Due	21,727	20,198
Non-accrual	44,130	41,293
Total loans	4,807,511	4,292,766
Home Equity Lines [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,613,264	1,667,552
Accruing 30-89 Days Past Due	5,283	5,882
Accruing 90 Days or Greater Past Due	482	0
Total Accruing Past Due	5,765	5,882
Non-accrual	19,815	16,480
Total loans	1,638,844	1,689,914
Consumer Mortgages [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	2,212,358	1,907,644
Accruing 30-89 Days Past Due	9,411	8,657
Accruing 90 Days or Greater Past Due	101	134
Total Accruing Past Due	9,512	8,791
Non-accrual	21,284	22,248
Total loans	2,243,154	1,938,683
Credit Cards [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	229,735	237,742
Accruing 30-89 Days Past Due	1,309	1,663
Accruing 90 Days or Greater Past Due	1,265	1,446
Total Accruing Past Due	2,574	3,109
Non-accrual	0	0
Total loans	232,309	240,851
Other Retail Loans [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	686,297	418,337
Accruing 30-89 Days Past Due	3,754	2,390
Accruing 90 Days or Greater Past Due	122	26
Total Accruing Past Due	3,876	2,416
Non-accrual	3,031	2,565
Total loans	$ 693,204	$ 423,318

Loans and Allowance for Loan 43

Loans and Allowance for Loan Losses (Loan Portfolio Credit Exposure) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 23,289,083	$ 22,459,664	$ 21,892,676
Accrual substandard loans	281,800	303,700
Deferred fees and costs, net	$ 26,200	30,100	$ 28,400
Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Allowance for loan losses, percent of loan amount	50.00%
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 7,465,578	7,394,768
Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,969,466	5,751,631
1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,071,054	1,129,156
Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	425,058	513,981
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,015,994	10,772,130
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,544,629	6,453,180
Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,471,365	4,318,950
Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,807,511	4,292,766
Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,638,844	1,689,914
Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,243,154	1,938,683
Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	232,309	240,851
Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	693,204	423,318
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,474,711	21,531,712
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,187,816	6,993,333
Pass [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,852,738	5,560,595
Pass [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	961,369	995,903
Pass [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	373,709	436,835
Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,536,135	10,302,810
Pass [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,259,343	6,184,179
Pass [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,276,792	4,118,631
Pass [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,750,760	4,235,569
Pass [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,611,366	1,666,586
Pass [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,218,687	1,910,649
Pass [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	231,044	239,405
Pass [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	689,663	418,929
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	384,390	455,917
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	158,867	225,238
Special Mention [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	80,002	114,705
Special Mention [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,024	64,325
Special Mention [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	30,841	46,208
Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	225,523	230,679
Special Mention [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	152,273	152,189
Special Mention [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	73,250	78,490
Special Mention [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	402,383	441,853
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	111,527	168,631
Substandard [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	36,726	76,331
Substandard [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	54,619	61,726
Substandard [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	20,182	30,574
Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	241,811	221,930
Substandard [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	121,900	100,658
Substandard [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	119,911	121,272
Substandard [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	49,045	51,292
Substandard [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,131	20,456
Substandard [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,002	26,041
Substandard [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	483	480
Substandard [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,429	4,315
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,105	23,900
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,368	7,566
Doubtful [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,042	7,202
Doubtful [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	326	364
Doubtful [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,515	13,428
Doubtful [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,103	13,330
Doubtful [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,412	98
Doubtful [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,222	2,906
Doubtful [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,895	1,206
Doubtful [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,285	1,700
Doubtful [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	42	0
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,494	6,282
Loss [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,010	3,283
Loss [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,010	2,824
Loss [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	459
Loss [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,484	2,999
Loss [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,452	1,666
Loss [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	180	293
Loss [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	782	966
Loss [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 70	$ 74

Loans and Allowance for Loan 44

Loans and Allowance for Loan Losses (Schedule Of Allowances For Loan Losses And Recorded Investment In Loans) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	$ 255,076,000	$ 254,702,000	$ 252,496,000	$ 261,317,000
Charge-offs	(13,984,000)	(14,843,000)	(41,070,000)	(46,072,000)
Recoveries	7,054,000	8,085,000	20,650,000	21,665,000
Provision for loan losses	5,671,000	2,956,000	21,741,000	13,990,000
Ending balance, allowance	253,817,000	250,900,000	253,817,000	250,900,000
Ending balance: individually evaluated for impairment, allowance	24,264,000	31,441,000	24,264,000	31,441,000
Ending balance: collectively evaluated for impairment, allowance	229,553,000	219,459,000	229,553,000	219,459,000
Total loans	23,289,083,000	21,892,676,000	23,289,083,000	21,892,676,000	$ 22,459,664,000
Ending balance: individually evaluated for impairment, loans	259,099,000	309,344,000	259,099,000	309,344,000
Ending balance: collectively evaluated for impairment, loans	23,029,984,000	21,583,332,000	23,029,984,000	21,583,332,000
Purchased credit-impaired loans	0	0	0	0
Allowance for purchased credit-impaired loans	0	0	0	0
Deferred fees and costs, net	26,200,000	28,400,000	26,200,000	28,400,000	$ 30,100,000
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	79,359,000	90,691,000	87,133,000	101,471,000
Charge-offs	(4,084,000)	(1,722,000)	(13,361,000)	(12,120,000)
Recoveries	4,237,000	4,019,000	10,927,000	10,500,000
Provision for loan losses	1,590,000	(3,982,000)	(3,597,000)	(10,845,000)
Ending balance, allowance	81,102,000	89,006,000	81,102,000	89,006,000
Ending balance: individually evaluated for impairment, allowance	11,066,000	18,091,000	11,066,000	18,091,000
Ending balance: collectively evaluated for impairment, allowance	70,036,000	70,915,000	70,036,000	70,915,000
Total loans	7,465,578,000	7,207,461,000	7,465,578,000	7,207,461,000
Ending balance: individually evaluated for impairment, loans	102,837,000	159,582,000	102,837,000	159,582,000
Ending balance: collectively evaluated for impairment, loans	7,362,741,000	7,047,879,000	7,362,741,000	7,047,879,000
Commercial and Industrial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	129,633,000	123,050,000	122,989,000	118,110,000
Charge-offs	(6,437,000)	(8,342,000)	(17,098,000)	(17,417,000)
Recoveries	1,780,000	2,203,000	6,122,000	5,774,000
Provision for loan losses	5,912,000	5,510,000	18,875,000	15,954,000
Ending balance, allowance	130,888,000	122,421,000	130,888,000	122,421,000
Ending balance: individually evaluated for impairment, allowance	11,474,000	12,568,000	11,474,000	12,568,000
Ending balance: collectively evaluated for impairment, allowance	119,414,000	109,853,000	119,414,000	109,853,000
Total loans	11,015,994,000	10,525,972,000	11,015,994,000	10,525,972,000
Ending balance: individually evaluated for impairment, loans	118,442,000	109,904,000	118,442,000	109,904,000
Ending balance: collectively evaluated for impairment, loans	10,897,552,000	10,416,068,000	10,897,552,000	10,416,068,000
Retail [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	46,084,000	40,961,000	42,374,000	41,736,000
Charge-offs	(3,463,000)	(4,779,000)	(10,611,000)	(16,535,000)
Recoveries	1,037,000	1,863,000	3,601,000	5,391,000
Provision for loan losses	(1,831,000)	1,428,000	6,463,000	8,881,000
Ending balance, allowance	41,827,000	39,473,000	41,827,000	39,473,000
Ending balance: individually evaluated for impairment, allowance	1,724,000	782,000	1,724,000	782,000
Ending balance: collectively evaluated for impairment, allowance	40,103,000	38,691,000	40,103,000	38,691,000
Total loans	4,807,511,000	4,159,243,000	4,807,511,000	4,159,243,000
Ending balance: individually evaluated for impairment, loans	37,820,000	39,858,000	37,820,000	39,858,000
Ending balance: collectively evaluated for impairment, loans	$ 4,769,691,000	$ 4,119,385,000	$ 4,769,691,000	$ 4,119,385,000

Loans and Allowance for Loan 45

Loans and Allowance for Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 20,572,000		$ 20,572,000		$ 35,108,000
Recorded Investment, With allowance recorded	238,527,000		238,527,000		266,692,000
Recorded Investment	259,099,000		259,099,000		301,800,000
Unpaid Principal Balance, With no related allowance recorded	31,697,000		31,697,000		78,312,000
Unpaid Principal Balance, With allowance recorded	241,235,000		241,235,000		270,004,000
Unpaid Principal Balance	272,932,000		272,932,000		348,316,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	24,264,000		24,264,000		30,435,000
Related Allowance	24,264,000		24,264,000		30,435,000
Average Recorded Investment, With no related allowance recorded	19,817,000		27,188,000		50,030,000
Average Recorded Investment, With allowance recorded	243,196,000		253,987,000		308,224,000
Average Recorded Investment	263,013,000	$ 323,500,000	281,175,000	$ 375,500,000	358,254,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	2,108,000		6,137,000		9,522,000
Interest Income Recognized	2,108,000		6,137,000	$ 0	9,522,000
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	3,796,000		3,796,000		20,109,000
Recorded Investment, With allowance recorded	99,041,000		99,041,000		137,849,000
Recorded Investment	102,837,000		102,837,000		157,958,000
Unpaid Principal Balance, With no related allowance recorded	11,268,000		11,268,000		57,525,000
Unpaid Principal Balance, With allowance recorded	99,053,000		99,053,000		138,419,000
Unpaid Principal Balance	110,321,000		110,321,000		195,944,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	11,066,000		11,066,000		18,969,000
Related Allowance	11,066,000		11,066,000		18,969,000
Average Recorded Investment, With no related allowance recorded	6,378,000		11,873,000		28,068,000
Average Recorded Investment, With allowance recorded	101,299,000		112,874,000		169,694,000
Average Recorded Investment	107,677,000		124,747,000		197,762,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	829,000		2,535,000		4,685,000
Interest Income Recognized	829,000		2,535,000		4,685,000
Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	996,000		996,000		10,051,000
Recorded Investment, With allowance recorded	37,634,000		37,634,000		62,305,000
Recorded Investment	38,630,000		38,630,000		72,356,000
Unpaid Principal Balance, With no related allowance recorded	1,032,000		1,032,000		12,946,000
Unpaid Principal Balance, With allowance recorded	37,639,000		37,639,000		62,305,000
Unpaid Principal Balance	38,671,000		38,671,000		75,251,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	3,004,000		3,004,000		10,070,000
Related Allowance	3,004,000		3,004,000		10,070,000
Average Recorded Investment, With no related allowance recorded	3,158,000		6,901,000		11,625,000
Average Recorded Investment, With allowance recorded	38,125,000		45,536,000		73,211,000
Average Recorded Investment	41,283,000		52,437,000		84,836,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	342,000		1,364,000		2,131,000
Interest Income Recognized	342,000		1,364,000		2,131,000
1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,880,000		1,880,000		1,507,000
Recorded Investment, With allowance recorded	47,139,000		47,139,000		51,376,000
Recorded Investment	49,019,000		49,019,000		52,883,000
Unpaid Principal Balance, With no related allowance recorded	5,876,000		5,876,000		5,526,000
Unpaid Principal Balance, With allowance recorded	47,146,000		47,146,000		51,376,000
Unpaid Principal Balance	53,022,000		53,022,000		56,902,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	7,394,000		7,394,000		6,184,000
Related Allowance	7,394,000		7,394,000		6,184,000
Average Recorded Investment, With no related allowance recorded	1,150,000		1,328,000		2,546,000
Average Recorded Investment, With allowance recorded	49,079,000		49,496,000		61,690,000
Average Recorded Investment	50,229,000		50,824,000		64,236,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	361,000		822,000		1,618,000
Interest Income Recognized	361,000		822,000		1,618,000
Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	920,000		920,000		8,551,000
Recorded Investment, With allowance recorded	14,268,000		14,268,000		24,168,000
Recorded Investment	15,188,000		15,188,000		32,719,000
Unpaid Principal Balance, With no related allowance recorded	4,360,000		4,360,000		39,053,000
Unpaid Principal Balance, With allowance recorded	14,268,000		14,268,000		24,738,000
Unpaid Principal Balance	18,628,000		18,628,000		63,791,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	668,000		668,000		2,715,000
Related Allowance	668,000		668,000		2,715,000
Average Recorded Investment, With no related allowance recorded	2,070,000		3,644,000		13,897,000
Average Recorded Investment, With allowance recorded	14,095,000		17,842,000		34,793,000
Average Recorded Investment	16,165,000		21,486,000		48,690,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	126,000		349,000		936,000
Interest Income Recognized	126,000		349,000		936,000
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	14,911,000		14,911,000		13,155,000
Recorded Investment, With allowance recorded	103,531,000		103,531,000		92,444,000
Recorded Investment	118,442,000		118,442,000		105,599,000
Unpaid Principal Balance, With no related allowance recorded	17,313,000		17,313,000		18,816,000
Unpaid Principal Balance, With allowance recorded	106,227,000		106,227,000		94,062,000
Unpaid Principal Balance	123,540,000		123,540,000		112,878,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	11,474,000		11,474,000		10,477,000
Related Allowance	11,474,000		11,474,000		10,477,000
Average Recorded Investment, With no related allowance recorded	11,574,000		13,458,000		20,394,000
Average Recorded Investment, With allowance recorded	105,755,000		105,183,000		99,063,000
Average Recorded Investment	117,329,000		118,641,000		119,457,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	838,000		2,282,000		2,939,000
Interest Income Recognized	838,000		2,282,000		2,939,000
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	4,015,000		4,015,000		4,393,000
Recorded Investment, With allowance recorded	47,881,000		47,881,000		42,914,000
Recorded Investment	51,896,000		51,896,000		47,307,000
Unpaid Principal Balance, With no related allowance recorded	5,406,000		5,406,000		7,606,000
Unpaid Principal Balance, With allowance recorded	50,357,000		50,357,000		44,374,000
Unpaid Principal Balance	55,763,000		55,763,000		51,980,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	9,736,000		9,736,000		8,339,000
Related Allowance	9,736,000		9,736,000		8,339,000
Average Recorded Investment, With no related allowance recorded	4,351,000		5,276,000		5,737,000
Average Recorded Investment, With allowance recorded	51,820,000		53,618,000		43,740,000
Average Recorded Investment	56,171,000		58,894,000		49,477,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	346,000		863,000		1,125,000
Interest Income Recognized	346,000		863,000		1,125,000
Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	10,896,000		10,896,000		8,762,000
Recorded Investment, With allowance recorded	55,650,000		55,650,000		49,530,000
Recorded Investment	66,546,000		66,546,000		58,292,000
Unpaid Principal Balance, With no related allowance recorded	11,907,000		11,907,000		11,210,000
Unpaid Principal Balance, With allowance recorded	55,870,000		55,870,000		49,688,000
Unpaid Principal Balance	67,777,000		67,777,000		60,898,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	1,738,000		1,738,000		2,138,000
Related Allowance	1,738,000		1,738,000		2,138,000
Average Recorded Investment, With no related allowance recorded	7,223,000		8,182,000		14,657,000
Average Recorded Investment, With allowance recorded	53,935,000		51,565,000		55,323,000
Average Recorded Investment	61,158,000		59,747,000		69,980,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	492,000		1,419,000		1,814,000
Interest Income Recognized	492,000		1,419,000		1,814,000
Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,865,000		1,865,000		1,844,000
Recorded Investment, With allowance recorded	35,955,000		35,955,000		36,399,000
Recorded Investment	37,820,000		37,820,000		38,243,000
Unpaid Principal Balance, With no related allowance recorded	3,116,000		3,116,000		1,971,000
Unpaid Principal Balance, With allowance recorded	35,955,000		35,955,000		37,523,000
Unpaid Principal Balance	39,071,000		39,071,000		39,494,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	1,724,000		1,724,000		989,000
Related Allowance	1,724,000		1,724,000		989,000
Average Recorded Investment, With no related allowance recorded	1,865,000		1,857,000		1,568,000
Average Recorded Investment, With allowance recorded	36,142,000		35,930,000		39,467,000
Average Recorded Investment	38,007,000		37,787,000		41,035,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	441,000		1,320,000		1,898,000
Interest Income Recognized	441,000		1,320,000		1,898,000
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,051,000		1,051,000		1,030,000
Recorded Investment, With allowance recorded	10,433,000		10,433,000		9,575,000
Recorded Investment	11,484,000		11,484,000		10,605,000
Unpaid Principal Balance, With no related allowance recorded	1,051,000		1,051,000		1,030,000
Unpaid Principal Balance, With allowance recorded	10,433,000		10,433,000		9,575,000
Unpaid Principal Balance	11,484,000		11,484,000		10,605,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	963,000		963,000		206,000
Related Allowance	963,000		963,000		206,000
Average Recorded Investment, With no related allowance recorded	1,051,000		1,043,000		573,000
Average Recorded Investment, With allowance recorded	9,870,000		9,563,000		8,318,000
Average Recorded Investment	10,921,000		10,606,000		8,891,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	254,000		766,000		346,000
Interest Income Recognized	254,000		766,000		346,000
Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	814,000		814,000		814,000
Recorded Investment, With allowance recorded	20,571,000		20,571,000		22,173,000
Recorded Investment	21,385,000		21,385,000		22,987,000
Unpaid Principal Balance, With no related allowance recorded	2,065,000		2,065,000		941,000
Unpaid Principal Balance, With allowance recorded	20,571,000		20,571,000		23,297,000
Unpaid Principal Balance	22,636,000		22,636,000		24,238,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	610,000		610,000		651,000
Related Allowance	610,000		610,000		651,000
Average Recorded Investment, With no related allowance recorded	814,000		814,000		995,000
Average Recorded Investment, With allowance recorded	20,817,000		21,259,000		26,044,000
Average Recorded Investment	21,631,000		22,073,000		27,039,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	108,000		332,000		1,229,000
Interest Income Recognized	108,000		332,000		1,229,000
Credit Card Receivable [Member]
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	0		0		0
Average Recorded Investment	0		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
Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	4,951,000		4,951,000		4,651,000
Recorded Investment	4,951,000		4,951,000		4,651,000
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	4,951,000		4,951,000		4,651,000
Unpaid Principal Balance	4,951,000		4,951,000		4,651,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	151,000		151,000		132,000
Related Allowance	151,000		151,000		132,000
Average Recorded Investment, With no related allowance recorded	0		0		0
Average Recorded Investment, With allowance recorded	5,455,000		5,108,000		5,105,000
Average Recorded Investment	5,455,000		5,108,000		5,105,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	79,000		222,000		323,000
Interest Income Recognized	$ 79,000		$ 222,000		$ 323,000

Loans and Allowance for Loan 46

Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	22	51	132	207
Recorded Investment	$ 7,792,000	$ 10,304,000	$ 40,186,000	$ 65,825,000
Net charge-offs	$ 0	$ 0	$ 0	$ 4,000,000
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	7	13	40	44
Recorded Investment	$ 4,127,000	$ 5,074,000	$ 12,024,000	$ 46,303,000
Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	1	4	5
Recorded Investment	$ 3,370,000	$ 3,090,000	$ 5,344,000	$ 23,837,000
1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4	10	23	31
Recorded Investment	$ 260,000	$ 1,616,000	$ 4,914,000	$ 20,675,000
Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	2	13	8
Recorded Investment	$ 497,000	$ 368,000	$ 1,766,000	$ 1,791,000
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	6	26	57	78
Recorded Investment	$ 3,178,000	$ 4,023,000	$ 25,188,000	$ 11,602,000
Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5	22	50	71
Recorded Investment	$ 387,000	$ 3,125,000	$ 19,180,000	$ 8,549,000
Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	4	7	7
Recorded Investment	$ 2,791,000	$ 898,000	$ 6,008,000	$ 3,053,000
Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	9	12	35	85
Recorded Investment	$ 487,000	$ 1,207,000	$ 2,974,000	$ 7,920,000
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	5	5	53
Recorded Investment	$ 123,000	$ 1,066,000	$ 347,000	$ 5,731,000
Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	6	12
Recorded Investment	$ 0	$ 0	$ 405,000	$ 1,296,000
Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	7	7	24	20
Recorded Investment	$ 364,000	$ 141,000	$ 2,222,000	$ 893,000
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	14,823,000
Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	14,823,000
Principal Forgiveness [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	14,823,000
Principal Forgiveness [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Principal Forgiveness [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Below Market Interest Rate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,074,000	2,546,000	25,907,000	30,042,000
Below Market Interest Rate [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	213,000	721,000	5,529,000	21,614,000
Below Market Interest Rate [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	1,826,000	16,932,000
Below Market Interest Rate [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	213,000	721,000	3,703,000	4,078,000
Below Market Interest Rate [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	604,000
Below Market Interest Rate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,791,000	1,514,000	19,406,000	4,833,000
Below Market Interest Rate [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	1,514,000	13,948,000	3,094,000
Below Market Interest Rate [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,791,000	0	5,458,000	1,739,000
Below Market Interest Rate [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	70,000	311,000	972,000	3,595,000
Below Market Interest Rate [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	309,000	224,000	2,826,000
Below Market Interest Rate [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	354,000	510,000
Below Market Interest Rate [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Below Market Interest Rate [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	70,000	2,000	394,000	259,000
Term Extensions and or Other Concessions [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	4,718,000	7,758,000	14,279,000	20,960,000
Term Extensions and or Other Concessions [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,914,000	4,353,000	6,495,000	9,866,000
Term Extensions and or Other Concessions [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,370,000	3,090,000	3,518,000	6,905,000
Term Extensions and or Other Concessions [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	47,000	895,000	1,211,000	1,774,000
Term Extensions and or Other Concessions [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	497,000	368,000	1,766,000	1,187,000
Term Extensions and or Other Concessions [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	387,000	2,509,000	5,782,000	6,769,000
Term Extensions and or Other Concessions [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	387,000	1,611,000	5,232,000	5,455,000
Term Extensions and or Other Concessions [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	898,000	550,000	1,314,000
Term Extensions and or Other Concessions [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	417,000	896,000	2,002,000	4,325,000
Term Extensions and or Other Concessions [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	123,000	757,000	123,000	2,905,000
Term Extensions and or Other Concessions [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	51,000	786,000
Term Extensions and or Other Concessions [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0	0	0
Term Extensions and or Other Concessions [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	$ 294,000	$ 139,000	$ 1,828,000	$ 634,000

Other Comprehensive Income (L47

Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ 5,165		$ (29,819)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,257)	$ (12,297)	(12,504)	$ (12,618)	$ (12,687)	$ (12,824)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member] | Valuation Allowance of Deferred Tax Assets [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,100)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	16,528	$ 22,459	$ (18,222)	$ 5,561	$ (10,659)	$ (713)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member] | Valuation Allowance of Deferred Tax Assets [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (13,300)

Other Comprehensive Income (L48

Other Comprehensive Income (Loss) (Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance			$ (29,819)
Other comprehensive income (loss), Net of Tax Amount	$ (5,840)	$ 16,231	34,984	$ 6,513
Ending balance	5,165		5,165
Total [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	11,005	(22,323)	(29,819)	(12,605)
Other comprehensive income (loss) before reclassifications	(5,832)	16,220	34,890	8,084
Amounts reclassified from accumulated other comprehensive income (loss)	(8)	11	94	(1,571)
Other comprehensive income (loss), Net of Tax Amount	(5,840)	16,231	34,984	6,513
Ending balance	5,165	(6,092)	5,165	(6,092)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	(12,297)	(12,687)	(12,504)	(12,824)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	40	69	247	206
Other comprehensive income (loss), Net of Tax Amount	40	69	247	206
Ending balance	(12,257)	(12,618)	(12,257)	(12,618)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	22,459	(10,659)	(18,222)	(713)
Other comprehensive income (loss) before reclassifications	(5,895)	16,220	34,827	7,941
Amounts reclassified from accumulated other comprehensive income (loss)	(36)	0	(77)	(1,667)
Other comprehensive income (loss), Net of Tax Amount	(5,931)	16,220	34,750	6,274
Ending balance	16,528	5,561	16,528	5,561
Post-Retirement Unfunded Health Benefit [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	843	1,023	907	932
Other comprehensive income (loss) before reclassifications	63	0	63	143
Amounts reclassified from accumulated other comprehensive income (loss)	(12)	(58)	(76)	(110)
Other comprehensive income (loss), Net of Tax Amount	51	(58)	(13)	33
Ending balance	$ 894	$ 965	$ 894	$ 965

Other Comprehensive Income (L49

Other Comprehensive Income (Loss) (Reclassifications out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (30,547)	$ (30,303)	$ (92,620)	$ (88,450)
Loss on early extinguishment of debt	0	0	(4,735)	0
Income tax (expense) benefit	(37,375)	(36,058)	(102,148)	(100,149)
Investment securities gains, net	59	0	126	2,710
Salaries and other personnel expense	(185,871)	(177,907)	(562,716)	(534,621)
Net income available to common shareholders	62,686	55,369	170,555	160,006
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(65)	(112)	(205)	(336)
Loss on early extinguishment of debt			(197)	0
Income tax (expense) benefit	25	43	155	130
Net income available to common shareholders	(40)	(69)	(247)	(206)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	(23)	0	(49)	(1,043)
Investment securities gains, net	59	0	126	2,710
Net income available to common shareholders	36	0	77	1,667
Reclassification out of Accumulated Other Comprehensive Income [Member] | Post-Retirement Unfunded Health Benefit [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	(8)	(36)	(48)	(68)
Salaries and other personnel expense	20	94	124	178
Net income available to common shareholders	$ 12	$ 58	$ 76	$ 110

Fair Value Accounting (Financia

Fair Value Accounting (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 7,309	$ 5,097
Investment securities available for sale	3,603,153	3,587,818
Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	185,151	210,004
Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	876,109	529,597
State And Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,899	4,434
U.S. Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	74,512	43,357
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,422,656	2,630,419
Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	8,647	9,672
Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	20,036	19,803
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	86,331	56,102
Private equity investments	0	0
Derivative assets	0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	7,309	5,097
Investment securities available for sale	3,515,049	3,529,971
Private equity investments	0	870
Derivative assets	34,743	27,139
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	1,773	1,745
Private equity investments	25,992	27,148
Derivative assets	0	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	7,309	5,097
Mortgage loans held for sale	95,769	59,275
Investment securities available for sale	3,603,153	3,587,818
Private equity investments	25,992	28,018
Mutual funds held in Rabbi Trusts	11,206	10,664
Derivative assets	34,743	27,139
Trading account liabilities	5,666
Derivative liabilities	34,821	27,445
Fair Value, Measurements, Recurring [Member] | US Government Agencies Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,371
Investment securities available for sale	13,143	13,623
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,380	2,922
Investment securities available for sale	185,151	210,004
Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,860	1,078
Investment securities available for sale	876,109	529,597
Fair Value, Measurements, Recurring [Member] | State And Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	698	1,097
Investment securities available for sale	2,899	4,434
Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	74,512	43,357
Fair Value, Measurements, Recurring [Member] | Securities Issued By U S Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale		126,909
Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,422,656	2,630,419
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	8,647	9,672
Fair Value, Measurements, Recurring [Member] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	20,036	19,803
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	32,336	25,580
Derivative liabilities	32,747	26,030
Fair Value, Measurements, Recurring [Member] | Mortgage Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2,407	1,559
Derivative liabilities	659
Fair Value, Measurements, Recurring [Member] | Trading Account Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading account liabilities		1,032
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	1,415	1,415
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
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	86,331	56,102
Private equity investments	0	0
Mutual funds held in Rabbi Trusts	11,206	10,664
Derivative assets	0	0
Trading account liabilities	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | US Government Agencies Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
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 [Member] | Level 1 [Member] | Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | State And Municipal Securities [Member]
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 [Member] | Level 1 [Member] | U.S. Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	74,512	43,357
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Securities Issued By U S Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale		0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	8,647	9,672
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	3,172	3,073
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Interest Rate Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Mortgage Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Trading Account Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading account liabilities		0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Visa Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	7,309	5,097
Mortgage loans held for sale	95,769	59,275
Investment securities available for sale	3,515,049	3,529,971
Private equity investments	0	870
Mutual funds held in Rabbi Trusts	0	0
Derivative assets	34,743	27,139
Trading account liabilities	5,666
Derivative liabilities	33,406	26,030
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | US Government Agencies Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,371
Investment securities available for sale	13,143	13,623
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	2,380	2,922
Investment securities available for sale	185,151	210,004
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,860	1,078
Investment securities available for sale	876,109	529,597
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | State And Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	698	1,097
Investment securities available for sale	2,899	4,434
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Securities Issued By U S Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale		126,909
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,422,656	2,630,419
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	15,091	14,985
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Interest Rate Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	32,336	25,580
Derivative liabilities	32,747	26,030
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Mortgage Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2,407	1,559
Derivative liabilities	659
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Trading Account Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading account liabilities		1,032
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Visa Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
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	1,773	1,745
Private equity investments	25,992	27,148
Mutual funds held in Rabbi Trusts	0	0
Derivative assets	0	0
Trading account liabilities	0
Derivative liabilities	1,415	1,415
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | US Government Agencies Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
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 [Member] | Level 3 [Member] | Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
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 [Member] | Level 3 [Member] | State And Municipal Securities [Member]
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 [Member] | Level 3 [Member] | U.S. Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Securities Issued By U S Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale		0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,773	1,745
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Interest Rate Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Mortgage Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	0
Derivative liabilities	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Trading Account Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading account liabilities		0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Visa Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ 1,415	$ 1,415

Fair Value Accounting (Changes

Fair Value Accounting (Changes In Fair Value Included In Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ (87)	$ 1,012	$ 1,762	$ 450
Fair value	95,769		95,769		$ 59,275
Unpaid principal balance	92,910		92,910		58,177
Fair value less aggregate unpaid principal balance	$ 2,859		$ 2,859		$ 1,098

Fair Value Accounting (Change52

Fair Value Accounting (Changes In Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investment Securities Available for Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,625	$ 1,700	$ 1,745	$ 1,645
Included in earnings	0	0	0	0
Unrealized gains (losses) included in other comprehensive income	148	(169)	28	(114)
Purchases			0	0
Sales			0	0
Issuances			0	0
Settlements	0	0	0	0
Amortization of discount/premium			0	0
Transfers in and/or out of Level 3			0	0
Ending balance	1,773	1,531	1,773	1,531
Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30,	0	0	0	0
Private Equity Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	26,866	26,959	27,148	27,367
Included in earnings	(249)	(109)	(527)	(517)
Unrealized gains (losses) included in other comprehensive income	0	0	0	0
Purchases			0	0
Sales			0	0
Issuances			0	0
Settlements	(625)	0	(629)	0
Amortization of discount/premium			0	0
Transfers in and/or out of Level 3			0	0
Ending balance	25,992	26,850	25,992	26,850
Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30,	(249)	(109)	(527)	(517)
Visa Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(1,415)	(1,415)	(1,415)	(1,401)
Included in earnings	(360)	(363)	(1,080)	(1,092)
Unrealized gains (losses) included in other comprehensive income	0	0	0	0
Purchases			0	0
Sales			0	0
Issuances			0	0
Settlements	360	363	1,080	1,078
Amortization of discount/premium			0	0
Transfers in and/or out of Level 3			0	0
Ending balance	(1,415)	(1,415)	(1,415)	(1,415)
Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at September 30,	$ (360)	$ (363)	$ (1,080)	$ (1,092)

Fair Value Accounting (Assets A

Fair Value Accounting (Assets And Liabilities Measured At Fair Value On A Non-Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 259,099	$ 301,800
Other real estate	28,438	47,030
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other loans held for sale		0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other loans held for sale		0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other loans held for sale	2,474	425
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	5,952	11,264
Other loans held for sale	2,474	425
Other real estate	11,036	23,519
Other assets held for sale	7,094	3,425
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
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 [Member] | Level 2 [Member]
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 [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	5,952	11,264
Other loans held for sale	2,474	425
Other real estate	11,036	23,519
Other assets held for sale	$ 7,094	$ 3,425

Fair Value Accounting (Assets M

Fair Value Accounting (Assets Measured at Fair Value on Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 59	$ 1,789	$ 1,329	$ 3,549
Other Loans Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	2,096	0	2,096	0
Other Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	968	2,645	2,405	7,405
Other Assets Held-for-sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 907	$ 1,043	$ 7,532	$ 1,043

Fair Value Accounting (Fair Val

Fair Value Accounting (Fair Value Inputs, Assets, Quantitative Information) (Details) - Level 3 [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	4.38%	4.77%
Fair Value, Measurements, Recurring [Member] | Private Equity Investments [Member] | Internal Valuation [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of liquidity	15.00%	15.00%
Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	0.00%
Estimated selling costs	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	52.00%	80.00%
Estimated selling costs	10.00%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	11.00%	29.00%
Estimated selling costs	7.00%	7.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	0.00%
Estimated selling costs	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	13.00%	3.00%
Estimated selling costs	10.00%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	13.00%	3.00%
Estimated selling costs	7.00%	7.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	0.00%
Estimated selling costs	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	10.00%	20.00%
Estimated selling costs	10.00%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or Contracted Sales Price [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	6.00%	7.00%
Estimated selling costs	7.00%	7.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling costs	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling costs	10.00%	10.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling costs	7.00%	7.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Real Estate or Other Assets Less Estimated Selling Costs or BOV [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Real Estate or Other Assets Less Estimated Selling Costs or BOV [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	71.00%	35.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Real Estate or Other Assets Less Estimated Selling Costs or BOV [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	41.00%	31.00%

Fair Value Accounting (Carrying

Fair Value Accounting (Carrying And Estimated Fair Values Of Financial Instruments Carried On Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 367,342	$ 367,092
Interest bearing funds with Federal Reserve Bank	985,776	829,887
Interest earning deposits with banks	18,375	17,387
Federal funds sold and securities purchased under resale agreements	71,753	69,819
Trading account assets	7,309	5,097
Mortgage loans held for sale	95,769	59,275
Investment securities available for sale	3,603,153	3,587,818
Loans, net	23,009,070	22,177,069
Non-interest bearing deposits	7,059,059	6,732,970
Federal funds purchased and securities sold under repurchase agreements	195,025	177,025
Long-term debt	2,160,985	2,186,893
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	367,342	367,092
Interest bearing funds with Federal Reserve Bank	985,776	829,887
Interest earning deposits with banks	18,375	17,387
Federal funds sold and securities purchased under resale agreements	71,753	69,819
Trading account assets	0
Mortgage loans held for sale	0
Other loans held for sale		0
Investment securities available for sale	86,331	56,102
Private equity investments	0	0
Mutual funds held in Rabbi Trusts	11,206	10,664
Loans, net	0	0
Derivative assets	0	0
Trading account liabilities	0	0
Non-interest bearing deposits	0	0
Interest bearing deposits	0	0
Federal funds purchased and securities sold under repurchase agreements	195,025	177,025
Long-term debt	0	0
Derivative liability positions	0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		0
Interest bearing funds with Federal Reserve Bank	0	0
Interest earning deposits with banks	0	0
Federal funds sold and securities purchased under resale agreements	0	0
Trading account assets	7,309	5,097
Mortgage loans held for sale	95,769	59,275
Other loans held for sale		0
Investment securities available for sale	3,515,049	3,529,971
Private equity investments	0	870
Mutual funds held in Rabbi Trusts	0	0
Loans, net	0	0
Derivative assets	34,743	27,139
Trading account liabilities	5,666	1,032
Non-interest bearing deposits	7,059,059	6,732,970
Interest bearing deposits	17,125,098	16,516,222
Federal funds purchased and securities sold under repurchase agreements	0	0
Long-term debt	2,233,257	2,244,376
Derivative liability positions	33,406	26,030
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Interest bearing funds with Federal Reserve Bank	0	0
Interest earning deposits with banks	0	0
Federal funds sold and securities purchased under resale agreements	0	0
Trading account assets	0	0
Mortgage loans held for sale	0	0
Other loans held for sale	2,474	425
Investment securities available for sale	1,773	1,745
Private equity investments	25,992	27,148
Mutual funds held in Rabbi Trusts	0	0
Loans, net	22,991,371	22,192,903
Derivative assets	0	0
Trading account liabilities	0	0
Non-interest bearing deposits	0	0
Interest bearing deposits	0	0
Federal funds purchased and securities sold under repurchase agreements	0	0
Long-term debt	0	0
Derivative liability positions	1,415	1,415
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	367,342	367,092
Interest bearing funds with Federal Reserve Bank	985,776	829,887
Interest earning deposits with banks	18,375	17,387
Federal funds sold and securities purchased under resale agreements	71,753	69,819
Trading account assets	7,309	5,097
Mortgage loans held for sale	95,769	59,275
Other loans held for sale	2,474	425
Investment securities available for sale	3,603,153	3,587,818
Private equity investments	25,992	28,018
Mutual funds held in Rabbi Trusts	11,206	10,664
Loans, net	23,262,887	22,429,565
Derivative assets	34,743	27,139
Trading account liabilities	5,666	1,032
Non-interest bearing deposits	7,059,059	6,732,970
Interest bearing deposits	17,132,944	16,509,691
Federal funds purchased and securities sold under repurchase agreements	195,025	177,025
Long-term debt	2,160,985	2,186,893
Derivative liability positions	34,821	27,445
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	367,342	367,092
Interest bearing funds with Federal Reserve Bank	985,776	829,887
Interest earning deposits with banks	18,375	17,387
Federal funds sold and securities purchased under resale agreements	71,753	69,819
Trading account assets	7,309	5,097
Mortgage loans held for sale	95,769	59,275
Other loans held for sale	2,474	425
Investment securities available for sale	3,603,153	3,587,818
Private equity investments	25,992	28,018
Mutual funds held in Rabbi Trusts	11,206	10,664
Loans, net	22,991,371	22,192,903
Derivative assets	34,743	27,139
Trading account liabilities	5,666	1,032
Non-interest bearing deposits	7,059,059	6,732,970
Interest bearing deposits	17,125,098	16,516,222
Federal funds purchased and securities sold under repurchase agreements	195,025	177,025
Long-term debt	2,233,257	2,244,376
Derivative liability positions	$ 34,821	$ 27,445

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative [Line Items]
Remaining unamortized deferred gain (loss) balance of all previously terminated cash flow hedges		$ (195)		$ (597)
Cash flow hedge gain (loss) to be reclassified within 12 months		195
Deferred loss balance to loss on early extinguishment of debt	$ 197
Remaining deferred gain (loss) balance on all previously terminated fair value hedges		1,300		4,000
Deferred gain balance on terminated fair value hedges expected to be reclassified from long-term debt		1,300
Deferred gain balance to loss on early extinguishment of debt	$ 1,300
Derivative, fair value		1,400		1,400
Gain (loss) on sale of outstanding commitments		(830)	$ (356)
Deferred gains (loss) on discontinuation of cash flow hedge reclassified to earnings		1,400	2,300
Reclassification of hedge-related basis adjustment as a reduction to loss on early extinguishment of debt		1,300
Federal Funds Sold [Member]
Derivative [Line Items]
Federal funds sold		71,000
Federal Funds Sold, Counterparty with CCC [Member]
Derivative [Line Items]
Federal funds sold		23,300
Fixed Rate Residential Mortgage [Member]
Derivative [Line Items]
Commitments to fund fixed-rate mortgage loans		120,100		88,800
Unrealized gain on fair value of fixed-rate mortgage loans to customers		1,000	$ 632
Sale of outstanding commitments		39,400		95,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount of interest rate swap contracts		$ 1,310,000		$ 30,000

Derivative Instruments (Impact

Derivative Instruments (Impact Of Derivatives On Balance Sheet) (Details) - Not Designated As Hedging Instruments [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Assets [Member]
Derivative [Line Items]
Fair value of derivative assets	$ 34,743	$ 27,139
Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of derivative assets	32,336	25,580
Other Assets [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Fair value of derivative assets	2,407	1,559
Other Assets [Member] | Visa Derivative [Member]
Derivative [Line Items]
Fair value of derivative assets	0	0
Other Liabilities [Member]
Derivative [Line Items]
Fair value of derivative liabilities	34,821	27,445
Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of derivative liabilities	32,747	26,030
Other Liabilities [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Fair value of derivative liabilities	659	0
Other Liabilities [Member] | Visa Derivative [Member]
Derivative [Line Items]
Fair value of derivative liabilities	$ 1,415	$ 1,415

Derivative Instruments (Effect

Derivative Instruments (Effect Of Fair Value Hedges On Consolidated Statements Of Income) (Details) - Not Designated As Hedging Instruments [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ 679	$ (1,785)	$ 228	$ 286
Other Non-Interest Income [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	5	170	39	10
Mortgage Banking Income [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ 674	$ (1,955)	$ 189	$ 276

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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic Earnings (Loss) Per Share
Net income available to common shareholders	$ 62,686	$ 55,369	$ 170,555	$ 160,006
Weighted average common shares outstanding (in shares)	122,924	131,516	125,076	133,120
Net income per common share, basic (in dollars per share)	$ 0.51	$ 0.42	$ 1.36	$ 1.20
Diluted Earnings (Loss) Per Share
Net income available to common shareholders	$ 62,686	$ 55,369	$ 170,555	$ 160,006
Weighted average common shares outstanding (in shares)	122,924	131,516	125,076	133,120
Potentially dilutive shares from outstanding equity-based awards (in shares)	680	781	636	756
Weighted average number of diluted common shares (in shares)	123,604	132,297	125,712	133,876
Net income per common share, diluted (in dollars per share)	$ 0.51	$ 0.42	$ 1.36	$ 1.20

Net Income Per Common Share (Na

Net Income Per Common Share (Narrative) (Details) - shares shares in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Potentially dilutive shares	2.5	2.7

Share-based Compensation (Detai

Share-based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3.4	$ 3.2	$ 10.2	$ 9.5
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, shares granted (in shares)			0	0
Options outstanding (in options)	1,400,000		1,400,000
Weighted-average exercise price, options (in dollars per share)	$ 34.77		$ 34.77
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
Other equity compensation, shares granted (in shares)			344,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, shares granted (in shares)			84,000
Market Restricted Stock Units (MRSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
Other equity compensation, shares granted (in shares)			94,000
Weighted-average exercise price, shares granted during period (in dollars per share)			$ 26.35
Non-Vested Synovus Shares And Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, non-vested shares outstanding (in shares)	1,100,000		1,100,000
Weighted-average exercise price, non-vested shares outstanding (in dollars per share)	$ 26.36		$ 26.36
Minimum [Member] | Market Restricted Stock Units (MRSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on shareholder return	75.00%		75.00%
Minimum [Member] | Performance Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on return on average assets (ROAA)	0.00%		0.00%
Maximum [Member] | Market Restricted Stock Units (MRSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range based on shareholder return	125.00%		125.00%
Maximum [Member] | Performance Share Units (PSUs) [Member]
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 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equivalents authorized (in shares)	6,100,000		6,100,000
Shares of authorized but unissued common stock reserved for future grants (in shares)	8,600,000		8,600,000
Contractual term (years)			10 years
2013 Omnibus Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share equivalents ratio (in shares)	1		1
2013 Omnibus Plan [Member] | Value Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share equivalents ratio (in shares)	2		2
2013 Omnibus Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
2013 Omnibus Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			5 years

Commitments and Contingencies63

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loss Contingencies [Line Items]
Contractual amount net of risk participations	$ 82,000	$ 66,000
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	8,445,825	8,535,148
Letters of Credit [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	159,041	166,936
Commitments to Fund Commercial Real Estate, Construction, and Land Development Loans [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,525,451	1,882,130
Unused Credit Card Lines [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,093,049	1,055,181
Commitments under Home Equity Lines of Credit [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,095,322	1,051,386
Commitments to Fund Commercial and Industrial Loans [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	4,169,740	4,094,809
Other Loan Commitments [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	$ 403,222	$ 284,706

Legal Proceedings (Details)

Legal Proceedings (Details)	Sep. 30, 2016USD ($)
Minimum [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	$ 0
Maximum [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	$ 12,000,000