Synovus Financial (SNV) 10-Q 5 May 16 2016 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
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		125,500,300

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 352,060	$ 367,092
Interest bearing funds with Federal Reserve Bank	908,527	829,887
Interest earning deposits with banks	21,686	17,387
Federal funds sold and securities purchased under resale agreements	76,300	69,819
Trading account assets, at fair value	4,801	5,097
Mortgage loans held for sale, at fair value	62,867	59,275
Investment securities available for sale, at fair value	3,582,244	3,587,818
Loans, net of deferred fees and costs	22,758,203	22,429,565
Allowance for loan losses	(254,516)	(252,496)
Loans, net	22,503,687	22,177,069
Premises and equipment, net	439,122	445,155
Goodwill	24,431	24,431
Other real estate	38,462	47,030
Deferred tax asset, net	464,242	511,948
Other assets	692,828	650,645
Total assets	29,171,257	28,792,653
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing deposits	6,896,547	6,732,970
Interest bearing deposits, excluding brokered deposits	15,348,864	15,434,171
Brokered deposits	1,204,517	1,075,520
Total deposits	23,449,928	23,242,661
Federal funds purchased and securities sold under repurchase agreements	203,979	177,025
Long-term debt	2,360,865	2,186,893
Other liabilities	203,217	185,878
Total liabilities	26,217,989	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 March 31, 2016 and December 31, 2015	125,980	125,980
Common stock - $1.00 par value. Authorized 342,857,143 shares; 140,793,916 issued at March 31, 2016 and 140,592,409 issued at December 31, 2015; 125,849,939 outstanding at March 31, 2016 and 129,547,032 outstanding at December 31, 2015	140,794	140,592
Additional paid-in capital	2,989,854	2,989,981
Treasury stock, at cost – 14,943,977 shares at March 31, 2016 and 11,045,377 shares at December 31, 2015	(512,496)	(401,511)
Accumulated other comprehensive loss, net	(740)	(29,819)
Retained earnings	209,876	174,973
Total shareholders’ equity	2,953,268	3,000,196
Total liabilities and shareholders' equity	$ 29,171,257	$ 28,792,653

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, shares outstanding	100,000,000	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	140,793,916	140,592,409
Common stock, shares outstanding	125,849,939	129,547,032
Treasury stock, shares at cost	14,943,977	11,045,377

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest income:
Loans, including fees	$ 229,917	$ 215,269
Investment securities available for sale	16,972	13,943
Trading account assets	22	107
Mortgage loans held for sale	588	632
Federal Reserve Bank balances	999	645
Other earning assets	825	805
Total interest income	249,323	231,401
Interest expense:
Deposits	16,015	14,819
Federal funds purchased and securities sold under repurchase agreements	45	43
Long-term debt	15,070	13,276
Total interest expense	31,130	28,138
Net interest income	218,193	203,263
Provision for loan losses	9,377	4,397
Net interest income after provision for loan losses	208,816	198,866
Non-interest income:
Service charges on deposit accounts	19,710	19,133
Fiduciary and asset management fees	11,274	11,571
Brokerage revenue	6,483	7,251
Mortgage banking income	5,484	6,484
Bankcard fees	8,372	8,077
Investment securities gains, net	67	725
Other fee income	4,804	5,246
Other non-interest income	6,953	7,367
Total non-interest income	63,147	65,854
Non-interest expense:
Salaries and other personnel expense	101,358	96,488
Net occupancy and equipment expense	26,577	26,172
Third-party processing expense	11,116	10,343
FDIC insurance and other regulatory fees	6,719	6,957
Professional fees	6,369	5,594
Advertising expense	2,410	3,443
Foreclosed real estate expense, net	2,684	9,496
Loss on early extinguishment of debt	4,735	0
Restructuring charges, net	1,140	(107)
Other operating expenses	25,125	20,522
Total non-interest expense	188,233	178,908
Income before income taxes	83,730	85,812
Income tax expense	31,199	31,849
Net income	52,531	53,963
Dividends on preferred stock	2,559	2,559
Net income available to common shareholders	$ 49,972	$ 51,404
Net income per common share, basic (in dollars per share)	$ 0.39	$ 0.38
Net income per common share, diluted (in dollars per share)	$ 0.39	$ 0.38
Weighted average common shares outstanding, basic (in shares)	127,227	134,933
Weighted average common shares outstanding, diluted (in shares)	127,857	135,744

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income, Before-tax Amount	$ 83,730	$ 85,812
Net income, Tax (Expense) Benefit	(31,199)	(31,849)
Net income	52,531	53,963
Reclassification adjustment for losses realized in net income, Before-tax Amount	273	112
Reclassification adjustment for losses realized in net income, Tax (Expense) Benefit	(105)	(43)
Reclassification adjustment for losses realized in net income, Net of Tax Amount	168	69
Net unrealized gains on investment securities available for sale: Before-tax Amount
Reclassification adjustment for net gains realized in net income, Before-tax Amount	(67)	(725)
Net unrealized gains arising during the period, Before-tax Amount	47,172	15,211
Net unrealized gains, Before-tax Amount	47,105	14,486
Net unrealized gains on investment securities available for sale: Tax (Expense) Benefit
Reclassification adjustment for net gains realized in net income, Tax (Expense) Benefit	26	281
Net unrealized gains arising during the period, Tax (Expense) Benefit	(18,162)	(5,856)
Net unrealized gains, Tax (Expense) Benefit	(18,136)	(5,575)
Net unrealized gains on investment securities available for sale: Net of Tax Amount
Reclassification adjustment for net gains realized in net income, Net of Tax Amount	(41)	(444)
Net unrealized gains arising during the period, Net of Tax Amount	29,010	9,355
Net unrealized gains, Net of Tax Amount	28,969	8,911
Post-retirement unfunded health benefit: Before-tax Amount
Reclassification adjustment for gains realized in net income, Before-tax Amount	(94)	(42)
Net unrealized gains, Before-tax Amount	(94)	(42)
Post-retirement unfunded health benefit: Tax (Expense) Benefit
Reclassification adjustment for gains realized in net income, Tax (Expense) Benefit	36	16
Net unrealized gains, Tax (Expense) Benefit	36	16
Post-retirement unfunded health benefit: Net of Tax Amount
Reclassification adjustment for gains realized in net income, Net of Tax Amount	(58)	(26)
Net unrealized gains, Net of Tax Amount	(58)	(26)
Other comprehensive income, Before-tax Amount	47,284	14,556
Other comprehensive income, Tax (Expense) Benefit	(18,205)	(5,602)
Other comprehensive income, Net of Tax Amount	29,079	8,954
Comprehensive income, Net of Tax Amount	$ 81,610	$ 62,917

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - 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	53,963						53,963
Other comprehensive income, net of income taxes	8,954					8,954
Cash dividends declared on common stock	(13,434)						(13,434)
Cash dividends paid on Series C Preferred Stock	(2,559)						(2,559)
Repurchases of common stock	(59,113)			14,515	(73,628)
Restricted share unit activity	(4,418)		274	(4,325)			(367)
Stock options exercised	1,692		105	1,587
Share-based compensation net tax benefit (deficiency)	1,046			1,046
Share-based compensation expense	3,234			3,234
Balance at Mar. 31, 2015	3,030,635	125,980	140,329	2,976,882	(261,402)	(3,651)	52,497
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	52,531						52,531
Other comprehensive income, net of income taxes	29,079					29,079
Cash dividends declared on common stock	(15,069)						(15,069)
Cash dividends paid on Series C Preferred Stock	(2,559)						(2,559)
Repurchases of common stock	(110,985)				(110,985)
Restricted share unit activity	(2,818)		175	(2,993)
Stock options exercised	456		27	429
Share-based compensation net tax benefit (deficiency)	(900)			(900)
Share-based compensation expense	3,337			3,337
Balance at Mar. 31, 2016	$ 2,953,268	$ 125,980	$ 140,794	$ 2,989,854	$ (512,496)	$ (740)	$ 209,876

Consolidated Statements of Cha7

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock, per share	$ 0.12	$ 0.10

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net income	$ 52,531	$ 53,963
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	9,377	4,397
Depreciation, amortization, and accretion, net	13,785	13,799
Deferred income tax expense	28,601	28,718
Decrease (increase) in trading account assets	296	(6,139)
Originations of mortgage loans held for sale	(138,695)	(207,530)
Proceeds from sales of mortgage loans held for sale	138,677	184,712
Gain on sales of mortgage loans held for sale, net	(3,424)	(4,202)
(Increase) in other assets	(39,363)	(6,103)
Increase (decrease) in other liabilities	17,341	(30,818)
Investment securities gains, net	(67)	(725)
Losses and write-downs on other real estate, net	2,098	7,275
Losses and write-downs on other assets held for sale, net	1,270	0
Loss on early extinguishment of debt	4,735	0
Share-based compensation expense	3,337	3,234
Net cash provided by operating activities	90,499	40,581
Investing Activities
Net (increase) decrease in interest earning deposits with banks	(4,299)	4,939
Net increase in federal funds sold and securities purchased under resale agreements	(6,481)	(7,661)
Net increase in interest bearing funds with Federal Reserve Bank	(78,640)	(542,524)
Proceeds from maturities and principal collections of investment securities available for sale	168,039	155,005
Proceeds from sales of investment securities available for sale	243,609	32,419
Purchases of investment securities available for sale	(363,788)	(265,707)
Proceeds from sales of loans and principal repayments on other loans held for sale	4,259	12,507
Proceeds from sales of loans and principal repayments on other loans held for sale	10,798	8,785
Net increase in loans	(344,159)	(36,336)
Net increase in premises and equipment	(7,830)	(5,221)
Proceeds from sales of other assets held for sale	0	351
Net cash used in investing activities	(378,492)	(643,443)
Financing Activities
Net increase in demand and savings deposits	110,837	411,991
Net increase in certificates of deposit	96,212	164,184
Net increase (decrease) in federal funds purchased and securities sold under repurchase agreements	26,954	(1,593)
Repayments on long-term debt	(830,067)	(375,039)
Proceeds from issuance of long-term debt	1,000,000	425,000
Dividends paid to common shareholders	(15,069)	(13,434)
Dividends paid to preferred shareholders	(2,559)	(2,559)
Stock options exercised	456	1,692
Repurchases of common stock	(110,985)	(59,113)
Restricted stock activity	(2,818)	(4,418)
Net cash provided by financing activities	272,961	546,711
Decrease in cash and cash equivalents	(15,032)	(56,151)
Cash and cash equivalents at beginning of period	367,092	485,489
Cash and cash equivalents at end of period	352,060	429,338
Supplemental Cash Flow Information
Income tax payments (refunds), net	(656)	338
Interest paid	32,141	27,875
Non-cash Activities
Premises and equipment transferred to other assets held for sale	4,828	0
Loans foreclosed and transferred to other real estate	4,328	5,378
Loans transferred to other loans held for sale at fair value	$ 3,834	$ 10,100

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Significant 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, with approximately $29 billion in assets. Through our 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 our 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 257 branches and 335 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 valuation of other real estate, the fair value of investment securities, the fair value of private equity investments, contingent liabilities related to legal matters, and the deferred tax assets valuation allowance. Cash and Cash Equivalents Cash and cash equivalents consist of cash and due from banks. At March 31, 2016 and December 31, 2015 , $88 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 March 31, 2016 and December 31, 2015 , interest bearing funds with the Federal Reserve Bank included $130.2 million and $117.3 million , respectively, on deposit to meet Federal Reserve Bank requirements. Interest earning deposits with banks include $5.5 million and $2.2 million at March 31, 2016 and December 31, 2015 , respectively, which is pledged as collateral in connection with certain letters of credit. Federal funds sold include $74.0 million and $65.9 million at March 31, 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.

Share Repurchase Programs

Share Repurchase Programs	3 Months Ended
	Mar. 31, 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. As of March 31, 2016, Synovus had repurchased a total of $148.0 million or 5.1 million shares under the $300 million share repurchase program. During the first quarter of 2016, Synovus repurchased $110.9 million or 3.9 million shares and during the fourth quarter of 2015, Synovus repurchased $37.1 million or 1.2 million shares under the $300 million share repurchase program. At March 31, 2016, the remaining authorization under this program was $152.0 million .

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 are summarized below. March 31, 2016 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 43,147 559 — 43,706 U.S. Government agency securities 13,016 534 — 13,550 Securities issued by U.S. Government sponsored enterprises 126,305 297 — 126,602 Mortgage-backed securities issued by U.S. Government agencies 191,386 2,653 (143 ) 193,896 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,599,118 24,787 (1,771 ) 2,622,134 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 542,761 7,687 (393 ) 550,055 State and municipal securities 3,964 76 (1 ) 4,039 Equity securities 3,228 4,976 — 8,204 Other investments 20,194 286 (422 ) 20,058 Total investment securities available for sale $ 3,543,119 41,855 (2,730 ) 3,582,244 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 March 31, 2016 and December 31, 2015 , investment securities with a carrying value of $2.27 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 March 31, 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 income. 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 March 31, 2016 , Synovus had twenty-two investment securities in a loss position for less than twelve months and twelve 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 March 31, 2016 and December 31, 2015 , are presented below. March 31, 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 — — 11,938 143 11,938 143 Mortgage-backed securities issued by U.S. Government sponsored enterprises 559,661 1,602 29,281 169 588,942 1,771 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 71,875 393 71,875 393 State and municipal securities — — 51 1 51 1 Other investments — — 4,771 422 4,771 422 Total $ 559,661 1,602 117,916 1,128 677,577 2,730 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 March 31, 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 March 31, 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 $ 18,256 24,891 — — — 43,147 U.S. Government agency securities — 6,614 6,402 — — 13,016 Securities issued by U.S. Government sponsored enterprises 80,240 46,065 — — — 126,305 Mortgage-backed securities issued by U.S. Government agencies — — 17,447 173,939 — 191,386 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 566 1,333,864 1,264,688 — 2,599,118 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 542,761 — 542,761 State and municipal securities 1,037 350 — 2,577 — 3,964 Equity securities — — — — 3,228 3,228 Other investments — — 15,000 2,000 3,194 20,194 Total amortized cost $ 99,533 78,486 1,372,713 1,985,965 6,422 3,543,119 Fair Value U.S. Treasury securities $ 18,256 25,450 — — — 43,706 U.S. Government agency securities — 6,849 6,701 — — 13,550 Securities issued by U.S. Government sponsored enterprises 80,398 46,204 — — — 126,602 Mortgage-backed securities issued by U.S. Government agencies — — 17,810 176,086 — 193,896 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 588 1,341,168 1,280,378 — 2,622,134 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 550,055 — 550,055 State and municipal securities 1,049 352 — 2,638 — 4,039 Equity securities — — — — 8,204 8,204 Other investments — — 15,287 1,638 3,133 20,058 Total fair value $ 99,703 79,443 1,380,966 2,010,795 11,337 3,582,244 Proceeds from sales, gross gains, and gross losses on sales of securities available for sale for the three months ended March 31, 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. Three Months Ended March 31, (in thousands) 2016 2015 Proceeds from sales of investment securities available for sale $ 243,609 32,419 Gross realized gains 954 725 Gross realized losses (887 ) — Investment securities gains, net $ 67 725

Restructuring Charges

Restructuring Charges	3 Months Ended
	Mar. 31, 2016
Restructuring Charges [Abstract]
Restructuring Charges	Note 4 - Restructuring Charges For the three months ended March 31, 2016 and 2015 , total restructuring charges consist of the following components: Three Months Ended March 31, (in thousands) 2016 2015 Lease termination charges $ 44 — Asset impairment charges 1,045 — Gain on sale of assets held for sale, net — (157 ) Professional fees and other charges 51 50 Total restructuring charges, net $ 1,140 (107 ) For the three months ended March 31, 2016 , Synovus recorded restructuring charges of $1.1 million following the decision during the first quarter of 2016 to close four branches. During the three months ended March 31, 2015 , Synovus recorded net gains of $157 thousand on the sale of certain branch locations and recorded additional expense of $50 thousand associated with branch closings that occurred during 2014. The following table presents aggregate activity associated with accruals that resulted from restructuring charges during the three months ended March 31, 2016 and 2015 : (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2015 $ 1,930 4,687 6,617 Accruals for lease terminations — 44 44 Payments (397 ) (186 ) (583 ) Balance at March 31, 2016 $ 1,533 4,545 6,078 (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2014 $ 3,291 5,539 8,830 Payments (521 ) (221 ) (742 ) Balance at March 31, 2015 $ 2,770 5,318 8,088 All professional fees and other charges were paid in the years that they were incurred. No other restructuring charges resulted in payment accruals.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 . Current, Accruing Past Due, and Non-accrual Loans March 31, 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 $ 5,954,011 9,484 — 9,484 23,749 5,987,244 1-4 family properties 1,113,140 3,860 234 4,094 17,358 1,134,592 Land acquisition 453,042 2,424 — 2,424 14,416 469,882 Total commercial real estate 7,520,193 15,768 234 16,002 55,523 7,591,718 Commercial, financial and agricultural 6,477,031 18,403 425 18,828 63,312 6,559,171 Owner-occupied 4,246,794 6,581 261 6,842 18,582 4,272,218 Total commercial and industrial 10,723,825 24,984 686 25,670 81,894 10,831,389 Home equity lines 1,647,483 5,321 170 5,491 16,432 1,669,406 Consumer mortgages 1,937,378 10,415 644 11,059 21,756 1,970,193 Credit cards 229,613 1,470 1,471 2,941 — 232,554 Other retail loans 487,023 2,680 9 2,689 2,562 492,274 Total retail 4,301,497 19,886 2,294 22,180 40,750 4,364,427 Total loans $ 22,545,515 60,638 3,214 63,852 178,167 22,787,534 (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 1,086,612 6,300 103 6,403 16,839 1,109,854 Land acquisition 495,542 639 32 671 17,768 513,981 Total commercial real estate 7,308,461 9,223 135 9,358 57,647 7,375,466 Commercial, financial and agricultural 6,410,338 12,222 785 13,007 49,137 6,472,482 Owner-occupied 4,293,308 5,254 95 5,349 20,293 4,318,950 Total commercial and industrial 10,703,646 17,476 880 18,356 69,430 10,791,432 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 $29.3 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 March 31, 2016 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Investment properties $5,810,969 104,404 71,871 — — 5,987,244 1-4 family properties 1,011,558 56,557 59,284 7,193 — 1,134,592 Land acquisition 397,821 44,868 26,857 336 — 469,882 Total commercial real estate 7,220,348 205,829 158,012 7,529 — 7,591,718 Commercial, financial and agricultural 6,301,436 131,577 107,164 18,155 839 (3) 6,559,171 Owner-occupied 4,083,220 72,771 114,341 1,427 459 (3) 4,272,218 Total commercial and industrial 10,384,656 204,348 221,505 19,582 1,298 10,831,389 Home equity lines 1,645,741 — 20,906 1,109 1,650 (3) 1,669,406 Consumer mortgages 1,941,082 — 27,167 1,697 247 (3) 1,970,193 Credit cards 231,083 — 603 — 868 (4) 232,554 Other retail loans 487,912 — 4,278 — 84 (3) 492,274 Total retail 4,305,818 — 52,954 2,806 2,849 4,364,427 Total loans 21,910,822 410,177 432,471 29,917 4,147 22,787,534 (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 976,601 64,325 61,726 7,202 — 1,109,854 Land acquisition 436,835 46,208 30,574 364 — 513,981 Total commercial real estate 6,974,031 225,238 168,631 7,566 — 7,375,466 Commercial, financial and agricultural 6,203,481 152,189 100,658 13,330 2,824 (3) 6,472,482 Owner-occupied 4,118,631 78,490 121,272 98 459 (3) 4,318,950 Total commercial and industrial 10,322,112 230,679 221,930 13,428 3,283 10,791,432 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 $288.4 million and $303.7 million of Substandard accruing loans at March 31, 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 $29.3 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 three months ended March 31, 2016 and 2015 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Three Months Ended March 31, 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 (1,822 ) (5,525 ) (3,968 ) (11,315 ) Recoveries 1,293 1,264 1,401 3,958 Provision for loan losses (2,047 ) 6,150 5,274 9,377 Ending balance (1) $ 84,557 124,878 45,081 254,516 Ending balance: individually evaluated for impairment 17,603 14,033 1,337 32,973 Ending balance: collectively evaluated for impairment $ 66,954 110,845 43,744 221,543 Loans: Ending balance: total loans (1)(2) $ 7,591,718 10,831,389 4,364,427 22,787,534 Ending balance: individually evaluated for impairment 136,826 123,557 37,402 297,785 Ending balance: collectively evaluated for impairment $ 7,454,892 10,707,832 4,327,025 22,489,749 As Of and For The Three Months Ended March 31, 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 (7,440 ) (5,272 ) (7,912 ) (20,624 ) Recoveries 3,941 2,266 2,074 8,281 Provision for loan losses (3,764 ) 2,702 5,459 4,397 Ending balance (1) $ 94,208 $ 117,806 $ 41,357 $ 253,371 Ending balance: individually evaluated for impairment 18,558 9,411 1,037 29,006 Ending balance: collectively evaluated for impairment $ 75,650 108,395 40,320 224,365 Loans: Ending balance: total loans (1)(3) 6,898,159 10,316,689 3,920,733 21,135,581 Ending balance: individually evaluated for impairment 237,167 130,197 41,321 408,685 Ending balance: collectively evaluated for impairment $ 6,660,992 10,186,492 3,879,412 20,726,896 (1) As of and for the three months ended March 31, 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 $29.3 million . (3) Total before net deferred fees and costs of $29.4 million . The tables below summarize impaired loans (including accruing TDRs) as of March 31, 2016 and December 31, 2015 . Impaired Loans (including accruing TDRs) March 31, 2016 Three Months Ended March 31, 2016 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded Investment properties $ 8,557 11,192 — 9,359 — 1-4 family properties 1,504 5,525 — 1,505 — Land acquisition 3,991 10,554 — 6,005 — Total commercial real estate 14,052 27,271 — 16,869 — Commercial, financial and agricultural 6,185 8,585 — 5,715 — Owner-occupied 9,492 11,033 — 8,570 — Total commercial and industrial 15,677 19,618 — 14,285 — Home equity lines 1,044 1,044 — 1,035 — Consumer mortgages 814 2,065 — 814 — Credit cards — — — — — Other retail loans — — — — — Total retail 1,858 3,109 — 1,849 — Total impaired loans with no related allowance recorded $ 31,587 49,998 — 33,003 — With allowance recorded Investment properties $ 53,449 53,475 9,158 58,015 656 1-4 family properties 49,048 49,048 5,899 49,434 117 Land acquisition 20,277 23,094 2,546 23,088 128 Total commercial real estate 122,774 125,617 17,603 130,537 901 Commercial, financial and agricultural 58,312 61,865 12,399 49,547 189 Owner-occupied 49,568 49,760 1,634 49,404 444 Total commercial and industrial 107,880 111,625 14,033 98,951 633 Home equity lines 9,772 9,772 165 9,618 116 Consumer mortgages 21,224 21,224 1,029 21,821 262 Credit cards — — — — — Other retail loans 4,548 4,548 143 4,679 72 Total retail 35,544 35,544 1,337 36,118 450 Total impaired loans with allowance recorded $ 266,198 272,786 32,973 265,606 1,984 Total impaired loans Investment properties $ 62,006 64,667 9,158 67,374 656 1-4 family properties 50,552 54,573 5,899 50,939 117 Land acquisition 24,268 33,648 2,546 29,093 128 Total commercial real estate 136,826 152,888 17,603 147,406 901 Commercial, financial and agricultural 64,497 70,450 12,399 55,262 189 Owner-occupied 59,060 60,793 1,634 57,974 444 Total commercial and industrial 123,557 131,243 14,033 113,236 633 Home equity lines 10,816 10,816 165 10,653 116 Consumer mortgages 22,038 23,289 1,029 22,635 262 Credit cards — — — — — Other retail loans 4,548 4,548 143 4,679 72 Total retail 37,402 38,653 1,337 37,967 450 Total impaired loans $ 297,785 322,784 32,973 298,609 1,984 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 $427.4 million for the three months ended March 31, 2015 . Excluding accruing TDRs, there was no interest income recognized for the investment in impaired loans for the three months ended March 31, 2015 . Interest income recognized for accruing TDRs was $2.6 million for the three months ended March 31, 2015 . At March 31, 2016 and December 31, 2015 , all impaired loans other than $209.2 million and $223.9 million , respectively, of accruing TDRs, 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 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 three months ended March 31, 2016 and 2015 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Three Months Ended March 31, 2016 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 2 $ — 437 148 585 1-4 family properties 7 — 395 840 1,235 Land acquisition 6 — — 535 535 Total commercial real estate 15 — 832 1,523 2,355 Commercial, financial and agricultural 30 — 12,014 3,387 15,401 Owner-occupied 4 — 1,535 448 1,983 Total commercial and industrial 34 — 13,549 3,835 17,384 Home equity lines 2 — 196 — 196 Consumer mortgages 3 — 154 — 154 Credit cards — — — — — Other retail loans 7 — 230 85 315 Total retail 12 — 580 85 665 Total TDRs 61 $ — 14,961 5,443 20,404 (1 ) (1) No net charge-offs were recorded during the three months ended March 31, 2016 upon restructuring of these loans. TDRs by Concession Type Three Months Ended March 31, 2015 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 3 $ — 16,932 3,604 20,536 1-4 family properties 13 14,823 2,856 150 17,829 Land acquisition 3 — 255 708 963 Total commercial real estate 19 14,823 20,043 4,462 39,328 Commercial, financial and agricultural 25 — 1,015 1,890 2,905 Owner-occupied 2 — 1,739 — 1,739 Total commercial and industrial 27 — 2,754 1,890 4,644 Home equity lines 11 — 975 135 1,110 Consumer mortgages 11 — 245 786 1,031 Credit cards — — — — — Other retail loans 6 — 257 64 321 Total retail 28 — 1,477 985 2,462 Total TDRs 74 $ 14,823 24,274 7,337 46,434 (2 ) (2) Net charge-offs of $4.0 million were recorded during the three months ended March 31, 2015 upon restructuring of these loans. For the three months ended March 31, 2016 , there were no defaults on accruing TDRs restructured during the previous twelve months (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 two defaults with a recorded investment of $115 thousand for the three months ended March 31, 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 March 31, 2016 , the allowance for loan losses allocated to accruing TDRs totaling $209.2 million was $12.2 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)	3 Months Ended
	Mar. 31, 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 three months ended March 31, 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 — 29,010 — 29,010 Amounts reclassified from accumulated other comprehensive income (loss) 168 (41 ) (58 ) 69 Net current period other comprehensive income 168 28,969 (58 ) 29,079 Balance as of March 31, 2016 $ (12,336 ) 10,747 849 (740 ) 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 — 9,355 — 9,355 Amounts reclassified from accumulated other comprehensive income (loss) 69 (444 ) (26 ) (401 ) Net current period other comprehensive income 69 8,911 (26 ) 8,954 Balance as of March 31, 2015 $ (12,755 ) $ 8,198 $ 906 $ (3,651 ) 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 March 31, 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 Three Months Ended March 31, 2016 2015 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ (76 ) (112 ) Interest expense Amortization of deferred losses (197 ) — Loss on early extinguishment of debt 105 43 Income tax (expense) benefit $ (168 ) (69 ) Reclassifications, net of income taxes Net unrealized gains on investment securities available for sale: Realized gain on sale of securities $ 67 725 Investment securities gains, net (26 ) (281 ) Income tax (expense) benefit $ 41 444 Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 94 42 Salaries and other personnel expense (36 ) (16 ) Income tax (expense) benefit $ 58 26 Reclassifications, net of income taxes

Fair Value Accounting

Fair Value Accounting	3 Months Ended
	Mar. 31, 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 March 31, 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 betweens levels during the three months ended March 31, 2016 and year ended December 31, 2015 were inconsequential. March 31, 2016 (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 — 2,727 — 2,727 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 395 — 395 State and municipal securities — 1,481 — 1,481 Other investments 15 183 — 198 Total trading securities $ 15 4,786 — 4,801 Mortgage loans held for sale — 62,867 — 62,867 Investment securities available for sale: U.S. Treasury securities 43,706 — — 43,706 U.S. Government agency securities — 13,550 — 13,550 Securities issued by U.S. Government sponsored enterprises — 126,602 — 126,602 Mortgage-backed securities issued by U.S. Government agencies — 193,896 — 193,896 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,622,134 — 2,622,134 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 550,055 — 550,055 State and municipal securities — 4,039 — 4,039 Equity securities 8,204 — — 8,204 Other investments (1) 3,134 15,286 1,638 20,058 Total investment securities available for sale $ 55,044 3,525,562 1,638 3,582,244 Private equity investments — 750 26,757 27,507 Mutual funds held in rabbi trusts 11,035 — — 11,035 Derivative assets: Interest rate contracts — 33,788 — 33,788 Mortgage derivatives (2) — 2,170 — 2,170 Total derivative assets $ — 35,958 — 35,958 Liabilities Trading account liabilities — 1,573 — 1,573 Derivative liabilities: Interest rate contracts — 34,232 — 34,232 Mortgage derivatives (2) — 762 — 762 Visa derivative — — 1,415 1,415 Total derivative liabilities $ — 34,994 1,415 36,409 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 were 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 Three Months Ended March 31, (in thousands) 2016 2015 Mortgage loans held for sale $ 971 410 Mortgage Loans Held for Sale (in thousands) As of March 31, 2016 As of December 31, 2015 Fair value $ 62,867 59,275 Unpaid principal balance 60,798 58,177 Fair value less aggregate unpaid principal balance 2,069 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 three months ended March 31, 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 three months ended March 31, 2016 and 2015 , Synovus did not have any transfers between levels in the fair value hierarchy. Three Months Ended March 31, 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 — (391 ) (360 ) — (286 ) (375 ) Unrealized gains (losses) included in other comprehensive income (107 ) — — 9 — — Settlements — — 360 — — 351 Ending balance, March 31, $ 1,638 26,757 (1,415 ) 1,654 27,081 (1,425 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at March 31, $ — (391 ) (360 ) — (286 ) (375 ) 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. March 31, 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 475-575 bps (524 bps) 427-527 bps (477 bps) Discount for lack of marketability (2) 0%-10% (0%) 0%-10% (0%) 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 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. March 31, 2016 December 31, 2015 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans * $ — — $ 4,452 4,452 — — 11,264 11,264 Other loans held for sale — — — — — — 425 425 Other real estate — — 11,910 11,910 — — 23,519 23,519 Other assets held for sale — — 1,200 1,200 — — 3,425 3,425 The following table presents fair value adjustments recognized in earnings for the three months ended March 31, 2016 and 2015 for the assets measured at fair value on a non-recurring basis. Three Months Ended March 31, (in thousands) 2016 2015 Impaired loans * $ 1,270 1,045 Other real estate 1,643 6,681 Other assets held for sale 1,032 — * Impaired loans that are collateral-dependent. 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. March 31, 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 Discount to appraised value (2) Estimated selling costs 0% - 83% (29%) 0% - 10% (7%) 0%-100% (51%) 0%-10% (7%) Other loans held for sale Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs 0%-11% (7%) 0%-10% (7%) Other real estate Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs 0% - 10% (7%) 0% - 10% (7%) 0%-20% (7%) 0%-10% (7%) Other assets held for sale Third-party appraised value of collateral less estimated selling costs or BOV Discount to appraised value (2) Estimated selling costs 0%-100% (85%) 0%-10% (7%) 0%-75% (42%) 0%-10% (7%) (1) The range represents management's best 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 various reasons, including age of the appraisal, information known by management about the property, such as occupancy rates, changes to the physical conditions of the property, and other factors. Fair Value of Financial Instruments The following table presents the carrying and fair values of financial instruments at March 31, 2016 and December 31, 2015 . The fair value represents management’s best estimates based on a range of methodologies and assumptions. For financial instruments that are not recorded at fair value on the balance sheet, such as loans, 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 March 31, 2016 and December 31, 2015 are as follows: March 31, 2016 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents 352,060 352,060 352,060 — — Interest bearing funds with Federal Reserve Bank 908,527 908,527 908,527 — — Interest earning deposits with banks 21,686 21,686 21,686 — — Federal funds sold and securities purchased under resale agreements 76,300 76,300 76,300 — — Trading account assets 4,801 4,801 15 4,786 — Mortgage loans held for sale 62,867 62,867 — 62,867 — Investment securities available for sale 3,582,244 3,582,244 55,044 3,525,562 1,638 Private equity investments 27,507 27,507 — 750 26,757 Mutual funds held in rabbi trusts 11,035 11,035 11,035 — — Loans, net of deferred fees and costs 22,758,203 22,480,492 — — 22,480,492 Derivative assets 35,958 35,958 — 35,958 — Financial liabilities Trading account liabilities 1,573 1,573 — 1,573 — Non-interest bearing deposits 6,896,547 6,896,547 — 6,896,547 — Interest bearing deposits 16,553,381 16,559,165 — 16,559,165 — Federal funds purchased and securities sold under repurchase agreements 203,979 203,979 203,979 — — Long-term debt 2,360,865 2,458,126 — 2,458,126 — Derivative liabilities 36,409 36,409 — 34,994 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	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015, Synovus had no outstanding interest rate swap contracts utilized to manage interest rate risk. 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 March 31, 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 March 31, 2016 and December 31, 2015 was $(324) thousand and $(597) thousand , respectively. Synovus expects to reclassify from accumulated other comprehensive income (loss) $259 thousand to interest expense during the next twelve 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 March 31, 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 March 31, 2016 and December 31, 2015 was $2.2 million and $4.0 million , respectively. Synovus expects to reclassify from hedge-related basis adjustment, a component of long-term debt, $1.8 million of the deferred gain balance on previously terminated fair value hedges as a reduction to interest expense during the next twelve 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 March 31, 2016 , the notional amount of customer related interest rate derivative financial instruments, including both the customer position and the offsetting position, was $1.27 billion , a decrease of $10.2 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 March 31, 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. 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 March 31, 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 $ 99.2 million and $88.8 million , respectively. The fair value of these commitments resulted in a gain of $782 thousand and $1.1 million for the three months ended March 31, 2016 and 2015 , respectively, which was recorded as a component of mortgage banking income in the consolidated statements of income. At March 31, 2016 and December 31, 2015 , outstanding commitments to sell primarily fixed-rate mortgage loans amounted to $117.0 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. The fair value of outstanding commitments to sell mortgage loans resulted in a loss of $933 thousand and a gain of $5 thousand for the three months ended March 31, 2016 and 2015 , respectively, which was recorded as a component of mortgage banking income in the consolidated statements of income. Collateral Contingencies Certain derivative instruments contain provisions that require Synovus to maintain an investment grade credit rating from each of the major credit rating agencies. When Synovus’ credit rating falls below investment grade, these provisions allow the counterparties of the derivative instrument to demand immediate and ongoing full collateralization on derivative instruments in net liability positions and, for certain counterparties, request immediate termination. As Synovus’ current rating is below investment grade, Synovus is required to post collateral, as required by each agreement, against these 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 March 31, 2016 , collateral totaling $74.0 million , consisting of Federal funds sold, was pledged to the derivative counterparties, including $21.7 million with the CCC, to comply with collateral requirements. The impact of derivative instruments on the consolidated balance sheets at March 31, 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 March 31, 2016 December 31, 2015 Location on Consolidated Balance Sheet March 31, 2016 December 31, 2015 Derivatives not designated as hedging instruments: Interest rate contracts Other assets $ 33,788 25,580 Other liabilities 34,232 26,030 Mortgage derivatives Other assets 2,170 1,559 Other liabilities 762 — Visa derivative — — Other liabilities 1,415 1,415 Total derivatives not designated as hedging instruments $ 35,958 27,139 36,409 27,445 The pre-tax effect of fair value hedges on the consolidated statements of income for the three months ended March 31, 2016 and 2015 is presented below. Gain (Loss) Recognized in Income (in thousands) Three Months Ended March 31, Derivatives not designated as hedging instruments Location of Gain (Loss) Recognized in Income 2016 2015 Interest rate contracts (1) Other non-interest income $ 6 (179 ) Mortgage derivatives (2) Mortgage banking income (151 ) 1,102 Total $ (145 ) 923 (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 three months ended March 31, 2016 and 2015 , Synovus reclassified $515 thousand and $774 thousand , respectively, from hedge-related basis adjustment, a component of long-term debt, as a reduction to interest expense. Additionally, during the three months ended March 31, 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	3 Months Ended
	Mar. 31, 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 three months ended March 31, 2016 and 2015 . Three Months Ended March 31, (in thousands, except per share data) 2016 2015 Basic Net Income Per Common Share: Net income available to common shareholders $ 49,972 $ 51,404 Weighted average common shares outstanding 127,227 134,933 Net income per common share, basic 0.39 0.38 Diluted Net Income Per Common Share: Net income available to common shareholders $ 49,972 $ 51,404 Weighted average common shares outstanding 127,227 134,933 Potentially dilutive shares from outstanding equity-based awards 630 811 Weighted average diluted common shares 127,857 135,744 Net income per common share, diluted 0.39 0.38 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 March 31, 2016 and 2015 , there were 2.5 million and 3.1 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	3 Months Ended
	Mar. 31, 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 March 31, 2016 , Synovus had a total of 6.2 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 $3.3 million for the three months ended March 31, 2016 , and $3.2 million for the three months ended March 31, 2015 . Stock Options No stock option grants were made during the three months ended March 31, 2016 or March 31, 2015. At March 31, 2016 , there were 1.6 million outstanding options to purchase shares of common stock with a weighted average exercise price of $33.13 per share. Restricted Share Units, Performance Share Units, and Market Restricted Share Units During the three months ended March 31, 2016 , Synovus awarded 320 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 84 thousand market restricted share units during the three months ended March 31, 2016 . The weighted average grant-date fair value of the awarded restricted share units, performance share units and market restricted share units was $26.01 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 March 31, 2016 , including dividend equivalents granted, there were 1.3 million restricted share units, performance share units and market restricted share units outstanding with a weighted average grant-date fair value of $25.29 per share.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 are presented below. (in thousands) March 31, 2016 December 31, 2015 Letters of credit* $ 191,766 166,936 Commitments to fund commercial real estate, construction, and land development loans 1,852,670 1,882,130 Unused credit card lines 1,057,833 1,055,181 Commitments under home equity lines of credit 1,073,028 1,051,386 Commitments to fund commercial and industrial loans 4,168,486 4,094,809 Other loan commitments 294,357 284,706 Total unfunded lending commitments and letters of credit $ 8,638,140 8,535,148 * Represents the contractual amount net of risk participations of $63 million and $66 million at March 31, 2016 and December 31, 2015, respectively.

Legal Proceedings

Legal Proceedings	3 Months Ended
	Mar. 31, 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 numerous 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 March 31, 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 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 Bank 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)	3 Months Ended
	Mar. 31, 2016
Significant 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 valuation of other real estate, the fair value of investment securities, the fair value of private equity investments, contingent liabilities related to legal matters, and the deferred tax assets valuation allowance.
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.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 are summarized below. March 31, 2016 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 43,147 559 — 43,706 U.S. Government agency securities 13,016 534 — 13,550 Securities issued by U.S. Government sponsored enterprises 126,305 297 — 126,602 Mortgage-backed securities issued by U.S. Government agencies 191,386 2,653 (143 ) 193,896 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,599,118 24,787 (1,771 ) 2,622,134 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 542,761 7,687 (393 ) 550,055 State and municipal securities 3,964 76 (1 ) 4,039 Equity securities 3,228 4,976 — 8,204 Other investments 20,194 286 (422 ) 20,058 Total investment securities available for sale $ 3,543,119 41,855 (2,730 ) 3,582,244 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 March 31, 2016 and December 31, 2015 , are presented below. March 31, 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 — — 11,938 143 11,938 143 Mortgage-backed securities issued by U.S. Government sponsored enterprises 559,661 1,602 29,281 169 588,942 1,771 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 71,875 393 71,875 393 State and municipal securities — — 51 1 51 1 Other investments — — 4,771 422 4,771 422 Total $ 559,661 1,602 117,916 1,128 677,577 2,730 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 March 31, 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 $ 18,256 24,891 — — — 43,147 U.S. Government agency securities — 6,614 6,402 — — 13,016 Securities issued by U.S. Government sponsored enterprises 80,240 46,065 — — — 126,305 Mortgage-backed securities issued by U.S. Government agencies — — 17,447 173,939 — 191,386 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 566 1,333,864 1,264,688 — 2,599,118 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 542,761 — 542,761 State and municipal securities 1,037 350 — 2,577 — 3,964 Equity securities — — — — 3,228 3,228 Other investments — — 15,000 2,000 3,194 20,194 Total amortized cost $ 99,533 78,486 1,372,713 1,985,965 6,422 3,543,119 Fair Value U.S. Treasury securities $ 18,256 25,450 — — — 43,706 U.S. Government agency securities — 6,849 6,701 — — 13,550 Securities issued by U.S. Government sponsored enterprises 80,398 46,204 — — — 126,602 Mortgage-backed securities issued by U.S. Government agencies — — 17,810 176,086 — 193,896 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 588 1,341,168 1,280,378 — 2,622,134 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — — 550,055 — 550,055 State and municipal securities 1,049 352 — 2,638 — 4,039 Equity securities — — — — 8,204 8,204 Other investments — — 15,287 1,638 3,133 20,058 Total fair value $ 99,703 79,443 1,380,966 2,010,795 11,337 3,582,244
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 three months ended March 31, 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. Three Months Ended March 31, (in thousands) 2016 2015 Proceeds from sales of investment securities available for sale $ 243,609 32,419 Gross realized gains 954 725 Gross realized losses (887 ) — Investment securities gains, net $ 67 725

Restructuring Charges (Tables)

Restructuring Charges (Tables)	3 Months Ended
	Mar. 31, 2016
Restructuring Charges [Abstract]
Schedule of Restructuring and Related Costs	For the three months ended March 31, 2016 and 2015 , total restructuring charges consist of the following components: Three Months Ended March 31, (in thousands) 2016 2015 Lease termination charges $ 44 — Asset impairment charges 1,045 — Gain on sale of assets held for sale, net — (157 ) Professional fees and other charges 51 50 Total restructuring charges, net $ 1,140 (107 ) The following table presents aggregate activity associated with accruals that resulted from restructuring charges during the three months ended March 31, 2016 and 2015 : (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2015 $ 1,930 4,687 6,617 Accruals for lease terminations — 44 44 Payments (397 ) (186 ) (583 ) Balance at March 31, 2016 $ 1,533 4,545 6,078 (in thousands) Severance Charges Lease Termination Charges Total Balance at December 31, 2014 $ 3,291 5,539 8,830 Payments (521 ) (221 ) (742 ) Balance at March 31, 2015 $ 2,770 5,318 8,088

Loans and Allowance for Loan 24

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2016 and December 31, 2015 . Current, Accruing Past Due, and Non-accrual Loans March 31, 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 $ 5,954,011 9,484 — 9,484 23,749 5,987,244 1-4 family properties 1,113,140 3,860 234 4,094 17,358 1,134,592 Land acquisition 453,042 2,424 — 2,424 14,416 469,882 Total commercial real estate 7,520,193 15,768 234 16,002 55,523 7,591,718 Commercial, financial and agricultural 6,477,031 18,403 425 18,828 63,312 6,559,171 Owner-occupied 4,246,794 6,581 261 6,842 18,582 4,272,218 Total commercial and industrial 10,723,825 24,984 686 25,670 81,894 10,831,389 Home equity lines 1,647,483 5,321 170 5,491 16,432 1,669,406 Consumer mortgages 1,937,378 10,415 644 11,059 21,756 1,970,193 Credit cards 229,613 1,470 1,471 2,941 — 232,554 Other retail loans 487,023 2,680 9 2,689 2,562 492,274 Total retail 4,301,497 19,886 2,294 22,180 40,750 4,364,427 Total loans $ 22,545,515 60,638 3,214 63,852 178,167 22,787,534 (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 1,086,612 6,300 103 6,403 16,839 1,109,854 Land acquisition 495,542 639 32 671 17,768 513,981 Total commercial real estate 7,308,461 9,223 135 9,358 57,647 7,375,466 Commercial, financial and agricultural 6,410,338 12,222 785 13,007 49,137 6,472,482 Owner-occupied 4,293,308 5,254 95 5,349 20,293 4,318,950 Total commercial and industrial 10,703,646 17,476 880 18,356 69,430 10,791,432 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 $29.3 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 March 31, 2016 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss Total Investment properties $5,810,969 104,404 71,871 — — 5,987,244 1-4 family properties 1,011,558 56,557 59,284 7,193 — 1,134,592 Land acquisition 397,821 44,868 26,857 336 — 469,882 Total commercial real estate 7,220,348 205,829 158,012 7,529 — 7,591,718 Commercial, financial and agricultural 6,301,436 131,577 107,164 18,155 839 (3) 6,559,171 Owner-occupied 4,083,220 72,771 114,341 1,427 459 (3) 4,272,218 Total commercial and industrial 10,384,656 204,348 221,505 19,582 1,298 10,831,389 Home equity lines 1,645,741 — 20,906 1,109 1,650 (3) 1,669,406 Consumer mortgages 1,941,082 — 27,167 1,697 247 (3) 1,970,193 Credit cards 231,083 — 603 — 868 (4) 232,554 Other retail loans 487,912 — 4,278 — 84 (3) 492,274 Total retail 4,305,818 — 52,954 2,806 2,849 4,364,427 Total loans 21,910,822 410,177 432,471 29,917 4,147 22,787,534 (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 976,601 64,325 61,726 7,202 — 1,109,854 Land acquisition 436,835 46,208 30,574 364 — 513,981 Total commercial real estate 6,974,031 225,238 168,631 7,566 — 7,375,466 Commercial, financial and agricultural 6,203,481 152,189 100,658 13,330 2,824 (3) 6,472,482 Owner-occupied 4,118,631 78,490 121,272 98 459 (3) 4,318,950 Total commercial and industrial 10,322,112 230,679 221,930 13,428 3,283 10,791,432 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 $288.4 million and $303.7 million of Substandard accruing loans at March 31, 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 $29.3 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 three months ended March 31, 2016 and 2015 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For The Three Months Ended March 31, 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 (1,822 ) (5,525 ) (3,968 ) (11,315 ) Recoveries 1,293 1,264 1,401 3,958 Provision for loan losses (2,047 ) 6,150 5,274 9,377 Ending balance (1) $ 84,557 124,878 45,081 254,516 Ending balance: individually evaluated for impairment 17,603 14,033 1,337 32,973 Ending balance: collectively evaluated for impairment $ 66,954 110,845 43,744 221,543 Loans: Ending balance: total loans (1)(2) $ 7,591,718 10,831,389 4,364,427 22,787,534 Ending balance: individually evaluated for impairment 136,826 123,557 37,402 297,785 Ending balance: collectively evaluated for impairment $ 7,454,892 10,707,832 4,327,025 22,489,749 As Of and For The Three Months Ended March 31, 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 (7,440 ) (5,272 ) (7,912 ) (20,624 ) Recoveries 3,941 2,266 2,074 8,281 Provision for loan losses (3,764 ) 2,702 5,459 4,397 Ending balance (1) $ 94,208 $ 117,806 $ 41,357 $ 253,371 Ending balance: individually evaluated for impairment 18,558 9,411 1,037 29,006 Ending balance: collectively evaluated for impairment $ 75,650 108,395 40,320 224,365 Loans: Ending balance: total loans (1)(3) 6,898,159 10,316,689 3,920,733 21,135,581 Ending balance: individually evaluated for impairment 237,167 130,197 41,321 408,685 Ending balance: collectively evaluated for impairment $ 6,660,992 10,186,492 3,879,412 20,726,896 (1) As of and for the three months ended March 31, 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 $29.3 million . (3) Total before net deferred fees and costs of $29.4 million .
Schedule of Impaired Loans	The tables below summarize impaired loans (including accruing TDRs) as of March 31, 2016 and December 31, 2015 . Impaired Loans (including accruing TDRs) March 31, 2016 Three Months Ended March 31, 2016 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded Investment properties $ 8,557 11,192 — 9,359 — 1-4 family properties 1,504 5,525 — 1,505 — Land acquisition 3,991 10,554 — 6,005 — Total commercial real estate 14,052 27,271 — 16,869 — Commercial, financial and agricultural 6,185 8,585 — 5,715 — Owner-occupied 9,492 11,033 — 8,570 — Total commercial and industrial 15,677 19,618 — 14,285 — Home equity lines 1,044 1,044 — 1,035 — Consumer mortgages 814 2,065 — 814 — Credit cards — — — — — Other retail loans — — — — — Total retail 1,858 3,109 — 1,849 — Total impaired loans with no related allowance recorded $ 31,587 49,998 — 33,003 — With allowance recorded Investment properties $ 53,449 53,475 9,158 58,015 656 1-4 family properties 49,048 49,048 5,899 49,434 117 Land acquisition 20,277 23,094 2,546 23,088 128 Total commercial real estate 122,774 125,617 17,603 130,537 901 Commercial, financial and agricultural 58,312 61,865 12,399 49,547 189 Owner-occupied 49,568 49,760 1,634 49,404 444 Total commercial and industrial 107,880 111,625 14,033 98,951 633 Home equity lines 9,772 9,772 165 9,618 116 Consumer mortgages 21,224 21,224 1,029 21,821 262 Credit cards — — — — — Other retail loans 4,548 4,548 143 4,679 72 Total retail 35,544 35,544 1,337 36,118 450 Total impaired loans with allowance recorded $ 266,198 272,786 32,973 265,606 1,984 Total impaired loans Investment properties $ 62,006 64,667 9,158 67,374 656 1-4 family properties 50,552 54,573 5,899 50,939 117 Land acquisition 24,268 33,648 2,546 29,093 128 Total commercial real estate 136,826 152,888 17,603 147,406 901 Commercial, financial and agricultural 64,497 70,450 12,399 55,262 189 Owner-occupied 59,060 60,793 1,634 57,974 444 Total commercial and industrial 123,557 131,243 14,033 113,236 633 Home equity lines 10,816 10,816 165 10,653 116 Consumer mortgages 22,038 23,289 1,029 22,635 262 Credit cards — — — — — Other retail loans 4,548 4,548 143 4,679 72 Total retail 37,402 38,653 1,337 37,967 450 Total impaired loans $ 297,785 322,784 32,973 298,609 1,984 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 three months ended March 31, 2016 and 2015 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Three Months Ended March 31, 2016 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 2 $ — 437 148 585 1-4 family properties 7 — 395 840 1,235 Land acquisition 6 — — 535 535 Total commercial real estate 15 — 832 1,523 2,355 Commercial, financial and agricultural 30 — 12,014 3,387 15,401 Owner-occupied 4 — 1,535 448 1,983 Total commercial and industrial 34 — 13,549 3,835 17,384 Home equity lines 2 — 196 — 196 Consumer mortgages 3 — 154 — 154 Credit cards — — — — — Other retail loans 7 — 230 85 315 Total retail 12 — 580 85 665 Total TDRs 61 $ — 14,961 5,443 20,404 (1 ) (1) No net charge-offs were recorded during the three months ended March 31, 2016 upon restructuring of these loans. TDRs by Concession Type Three Months Ended March 31, 2015 (in thousands, except contract data) Number of Contracts Principal Forgiveness Below Market Interest Rate Term Extensions and/or Other Concessions Total Investment properties 3 $ — 16,932 3,604 20,536 1-4 family properties 13 14,823 2,856 150 17,829 Land acquisition 3 — 255 708 963 Total commercial real estate 19 14,823 20,043 4,462 39,328 Commercial, financial and agricultural 25 — 1,015 1,890 2,905 Owner-occupied 2 — 1,739 — 1,739 Total commercial and industrial 27 — 2,754 1,890 4,644 Home equity lines 11 — 975 135 1,110 Consumer mortgages 11 — 245 786 1,031 Credit cards — — — — — Other retail loans 6 — 257 64 321 Total retail 28 — 1,477 985 2,462 Total TDRs 74 $ 14,823 24,274 7,337 46,434 (2 ) (2) Net charge-offs of $4.0 million were recorded during the three months ended March 31, 2015 upon restructuring of these loans.

Other Comprehensive Income (L25

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 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 three months ended March 31, 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 — 29,010 — 29,010 Amounts reclassified from accumulated other comprehensive income (loss) 168 (41 ) (58 ) 69 Net current period other comprehensive income 168 28,969 (58 ) 29,079 Balance as of March 31, 2016 $ (12,336 ) 10,747 849 (740 ) 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 — 9,355 — 9,355 Amounts reclassified from accumulated other comprehensive income (loss) 69 (444 ) (26 ) (401 ) Net current period other comprehensive income 69 8,911 (26 ) 8,954 Balance as of March 31, 2015 $ (12,755 ) $ 8,198 $ 906 $ (3,651 )
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 Three Months Ended March 31, 2016 2015 Net unrealized gains (losses) on cash flow hedges: Amortization of deferred losses $ (76 ) (112 ) Interest expense Amortization of deferred losses (197 ) — Loss on early extinguishment of debt 105 43 Income tax (expense) benefit $ (168 ) (69 ) Reclassifications, net of income taxes Net unrealized gains on investment securities available for sale: Realized gain on sale of securities $ 67 725 Investment securities gains, net (26 ) (281 ) Income tax (expense) benefit $ 41 444 Reclassifications, net of income taxes Post-retirement unfunded health benefit: Amortization of actuarial gains $ 94 42 Salaries and other personnel expense (36 ) (16 ) Income tax (expense) benefit $ 58 26 Reclassifications, net of income taxes

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 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 betweens levels during the three months ended March 31, 2016 and year ended December 31, 2015 were inconsequential. March 31, 2016 (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 — 2,727 — 2,727 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 395 — 395 State and municipal securities — 1,481 — 1,481 Other investments 15 183 — 198 Total trading securities $ 15 4,786 — 4,801 Mortgage loans held for sale — 62,867 — 62,867 Investment securities available for sale: U.S. Treasury securities 43,706 — — 43,706 U.S. Government agency securities — 13,550 — 13,550 Securities issued by U.S. Government sponsored enterprises — 126,602 — 126,602 Mortgage-backed securities issued by U.S. Government agencies — 193,896 — 193,896 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,622,134 — 2,622,134 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 550,055 — 550,055 State and municipal securities — 4,039 — 4,039 Equity securities 8,204 — — 8,204 Other investments (1) 3,134 15,286 1,638 20,058 Total investment securities available for sale $ 55,044 3,525,562 1,638 3,582,244 Private equity investments — 750 26,757 27,507 Mutual funds held in rabbi trusts 11,035 — — 11,035 Derivative assets: Interest rate contracts — 33,788 — 33,788 Mortgage derivatives (2) — 2,170 — 2,170 Total derivative assets $ — 35,958 — 35,958 Liabilities Trading account liabilities — 1,573 — 1,573 Derivative liabilities: Interest rate contracts — 34,232 — 34,232 Mortgage derivatives (2) — 762 — 762 Visa derivative — — 1,415 1,415 Total derivative liabilities $ — 34,994 1,415 36,409 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 were 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 Three Months Ended March 31, (in thousands) 2016 2015 Mortgage loans held for sale $ 971 410 Mortgage Loans Held for Sale (in thousands) As of March 31, 2016 As of December 31, 2015 Fair value $ 62,867 59,275 Unpaid principal balance 60,798 58,177 Fair value less aggregate unpaid principal balance 2,069 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 three months ended March 31, 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 three months ended March 31, 2016 and 2015 , Synovus did not have any transfers between levels in the fair value hierarchy. Three Months Ended March 31, 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 — (391 ) (360 ) — (286 ) (375 ) Unrealized gains (losses) included in other comprehensive income (107 ) — — 9 — — Settlements — — 360 — — 351 Ending balance, March 31, $ 1,638 26,757 (1,415 ) 1,654 27,081 (1,425 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held at March 31, $ — (391 ) (360 ) — (286 ) (375 )
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. March 31, 2016 December 31, 2015 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans * $ — — $ 4,452 4,452 — — 11,264 11,264 Other loans held for sale — — — — — — 425 425 Other real estate — — 11,910 11,910 — — 23,519 23,519 Other assets held for sale — — 1,200 1,200 — — 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 three months ended March 31, 2016 and 2015 for the assets measured at fair value on a non-recurring basis. Three Months Ended March 31, (in thousands) 2016 2015 Impaired loans * $ 1,270 1,045 Other real estate 1,643 6,681 Other assets held for sale 1,032 — * Impaired loans that are collateral-dependent.
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. March 31, 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 Discount to appraised value (2) Estimated selling costs 0% - 83% (29%) 0% - 10% (7%) 0%-100% (51%) 0%-10% (7%) Other loans held for sale Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs 0%-11% (7%) 0%-10% (7%) Other real estate Third-party appraised value of collateral less estimated selling costs Discount to appraised value (2) Estimated selling costs 0% - 10% (7%) 0% - 10% (7%) 0%-20% (7%) 0%-10% (7%) Other assets held for sale Third-party appraised value of collateral less estimated selling costs or BOV Discount to appraised value (2) Estimated selling costs 0%-100% (85%) 0%-10% (7%) 0%-75% (42%) 0%-10% (7%) (1) The range represents management's best 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 various reasons, including age of the appraisal, information known by management about the property, such as occupancy rates, changes to the physical conditions 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. March 31, 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 475-575 bps (524 bps) 427-527 bps (477 bps) Discount for lack of marketability (2) 0%-10% (0%) 0%-10% (0%) 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 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	he carrying and estimated fair values of financial instruments, as well as the level within the fair value hierarchy, as of March 31, 2016 and December 31, 2015 are as follows: March 31, 2016 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents 352,060 352,060 352,060 — — Interest bearing funds with Federal Reserve Bank 908,527 908,527 908,527 — — Interest earning deposits with banks 21,686 21,686 21,686 — — Federal funds sold and securities purchased under resale agreements 76,300 76,300 76,300 — — Trading account assets 4,801 4,801 15 4,786 — Mortgage loans held for sale 62,867 62,867 — 62,867 — Investment securities available for sale 3,582,244 3,582,244 55,044 3,525,562 1,638 Private equity investments 27,507 27,507 — 750 26,757 Mutual funds held in rabbi trusts 11,035 11,035 11,035 — — Loans, net of deferred fees and costs 22,758,203 22,480,492 — — 22,480,492 Derivative assets 35,958 35,958 — 35,958 — Financial liabilities Trading account liabilities 1,573 1,573 — 1,573 — Non-interest bearing deposits 6,896,547 6,896,547 — 6,896,547 — Interest bearing deposits 16,553,381 16,559,165 — 16,559,165 — Federal funds purchased and securities sold under repurchase agreements 203,979 203,979 203,979 — — Long-term debt 2,360,865 2,458,126 — 2,458,126 — Derivative liabilities 36,409 36,409 — 34,994 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)	3 Months Ended
	Mar. 31, 2016
Summary of Derivative Instruments [Abstract]
Impact of Derivatives on Balance Sheet	The impact of derivative instruments on the consolidated balance sheets at March 31, 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 March 31, 2016 December 31, 2015 Location on Consolidated Balance Sheet March 31, 2016 December 31, 2015 Derivatives not designated as hedging instruments: Interest rate contracts Other assets $ 33,788 25,580 Other liabilities 34,232 26,030 Mortgage derivatives Other assets 2,170 1,559 Other liabilities 762 — Visa derivative — — Other liabilities 1,415 1,415 Total derivatives not designated as hedging instruments $ 35,958 27,139 36,409 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 three months ended March 31, 2016 and 2015 is presented below. Gain (Loss) Recognized in Income (in thousands) Three Months Ended March 31, Derivatives not designated as hedging instruments Location of Gain (Loss) Recognized in Income 2016 2015 Interest rate contracts (1) Other non-interest income $ 6 (179 ) Mortgage derivatives (2) Mortgage banking income (151 ) 1,102 Total $ (145 ) 923 (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)	3 Months Ended
	Mar. 31, 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 three months ended March 31, 2016 and 2015 . Three Months Ended March 31, (in thousands, except per share data) 2016 2015 Basic Net Income Per Common Share: Net income available to common shareholders $ 49,972 $ 51,404 Weighted average common shares outstanding 127,227 134,933 Net income per common share, basic 0.39 0.38 Diluted Net Income Per Common Share: Net income available to common shareholders $ 49,972 $ 51,404 Weighted average common shares outstanding 127,227 134,933 Potentially dilutive shares from outstanding equity-based awards 630 811 Weighted average diluted common shares 127,857 135,744 Net income per common share, diluted 0.39 0.38

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Loan Commitments and Letters of Credit	Unfunded lending commitments and letters of credit at March 31, 2016 and December 31, 2015 are presented below. (in thousands) March 31, 2016 December 31, 2015 Letters of credit* $ 191,766 166,936 Commitments to fund commercial real estate, construction, and land development loans 1,852,670 1,882,130 Unused credit card lines 1,057,833 1,055,181 Commitments under home equity lines of credit 1,073,028 1,051,386 Commitments to fund commercial and industrial loans 4,168,486 4,094,809 Other loan commitments 294,357 284,706 Total unfunded lending commitments and letters of credit $ 8,638,140 8,535,148 * Represents the contractual amount net of risk participations of $63 million and $66 million at March 31, 2016 and December 31, 2015, respectively.

Significant Accounting Polici30

Significant Accounting Policies (Details) $ in Thousands	Mar. 31, 2016USD ($)BanksATMbranches	Dec. 31, 2015USD ($)
Basis Of Presentation [Line Items]
Assets	$ 29,171,257	$ 28,792,653
Number of bank divisions | Banks	28
Number of branches | branches	257
Number of ATMs | ATM	335
Cash and Cash Equivalents [Member]
Basis Of Presentation [Line Items]
Total deposits	$ 88	100
Cash and cash equivalents	130,200	117,300
Interest earning deposits with banks	5,500	2,200
Federal funds sold	$ 74,000	$ 65,900

Share Repurchase Programs (Deta

Share Repurchase Programs (Details) - Accelerated Share Repurchase Program [Member] - USD ($)	3 Months Ended			6 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Mar. 31, 2016
Equity, Class of Treasury Stock [Line Items]
Authorized amount			$ 300,000,000
Stock repurchase program expiration date			15 months
Remaining authorized repurchase amount	$ 152,000,000			$ 152,000,000
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchased amount	$ 110,900,000	$ 37,100,000		$ 148,000,000
Shares repurchased	3,900,000	1,200,000		5,100,000

Investment Securities (Narrativ

Investment Securities (Narrative) (Details) $ in Millions	Mar. 31, 2016USD ($)Securities	Dec. 31, 2015USD ($)
Investments [Abstract]
Pledged to secure deposits | $	$ 2,270	$ 2,430
Investment securities in a loss position for less than twelve months	22
Investment securities in a loss position for twelve months or longer	12

Investment Securities (Summary

Investment Securities (Summary Of Available For Sale Investment Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 3,543,119	$ 3,595,798
Gross Unrealized Gains	41,855	19,303
Gross Unrealized Losses	(2,730)	(27,283)
Fair Value	3,582,244	3,587,818
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	43,147	43,125
Gross Unrealized Gains	559	232
Gross Unrealized Losses	0	0
Fair Value	43,706	43,357
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,016	13,087
Gross Unrealized Gains	534	536
Gross Unrealized Losses	0	0
Fair Value	13,550	13,623
Securities Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	126,305	126,520
Gross Unrealized Gains	297	389
Gross Unrealized Losses	0	0
Fair Value	126,602	126,909
Mortgage-Backed Securities Issued By U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	191,386	209,785
Gross Unrealized Gains	2,653	1,340
Gross Unrealized Losses	(143)	(1,121)
Fair Value	193,896	210,004
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,599,118	2,645,107
Gross Unrealized Gains	24,787	7,874
Gross Unrealized Losses	(1,771)	(22,562)
Fair Value	2,622,134	2,630,419
Collateralized Mortgage Obligations Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	542,761	530,426
Gross Unrealized Gains	7,687	2,396
Gross Unrealized Losses	(393)	(3,225)
Fair Value	550,055	529,597
State And Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,964	4,343
Gross Unrealized Gains	76	92
Gross Unrealized Losses	(1)	(1)
Fair Value	4,039	4,434
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,228	3,228
Gross Unrealized Gains	4,976	6,444
Gross Unrealized Losses	0	0
Fair Value	8,204	9,672
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,194	20,177
Gross Unrealized Gains	286	0
Gross Unrealized Losses	(422)	(374)
Fair Value	$ 20,058	$ 19,803

Investment Securities (Schedule

Investment Securities (Schedule Of Unrealized Loss On Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 559,661	$ 1,990,616
Less than 12 Months, Unrealized Losses	1,602	14,491
12 Months or Longer, Fair Value	117,916	585,640
12 Months or Longer, Unrealized Losses	1,128	12,792
Total Fair Value, Fair Value	677,577	2,576,256
Total Fair Value, Unrealized Losses	2,730	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	0	122,626
Less than 12 Months, Unrealized Losses	0	639
12 Months or Longer, Fair Value	11,938	18,435
12 Months or Longer, Unrealized Losses	143	482
Total Fair Value, Fair Value	11,938	141,061
Total Fair Value, Unrealized Losses	143	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	559,661	1,656,194
Less than 12 Months, Unrealized Losses	1,602	12,874
12 Months or Longer, Fair Value	29,281	489,971
12 Months or Longer, Unrealized Losses	169	9,688
Total Fair Value, Fair Value	588,942	2,146,165
Total Fair Value, Unrealized Losses	1,771	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	0	196,811
Less than 12 Months, Unrealized Losses	0	963
12 Months or Longer, Fair Value	71,875	72,366
12 Months or Longer, Unrealized Losses	393	2,262
Total Fair Value, Fair Value	71,875	269,177
Total Fair Value, Unrealized Losses	393	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	51	50
12 Months or Longer, Unrealized Losses	1	1
Total Fair Value, Fair Value	51	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	4,771	4,818
12 Months or Longer, Unrealized Losses	422	359
Total Fair Value, Fair Value	4,771	19,803
Total Fair Value, Unrealized Losses	$ 422	$ 374

Investment Securities (Amortize

Investment Securities (Amortized Cost And Estimated Fair Value By Contractual Maturity Of Investment Securities Available For Sale) (Details) $ in Thousands	Mar. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	$ 99,533
1 to 5 Years, Amortized Cost	78,486
5 to 10 Years, Amortized Cost	1,372,713
More Than 10 years, Amortized Cost	1,985,965
No Stated Maturity, Amortized Cost	6,422
Total, Amortized Cost	3,543,119
Within One Year, Fair Value	99,703
1 to 5 Years, Fair Value	79,443
5 to 10 Years, Fair Value	1,380,966
More Than 10 years, Fair Value	2,010,795
No Stated Maturity, Fair Value	11,337
Total, Fair Value	3,582,244
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	18,256
1 to 5 Years, Amortized Cost	24,891
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	43,147
Within One Year, Fair Value	18,256
1 to 5 Years, Fair Value	25,450
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	0
Total, Fair Value	43,706
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	6,614
5 to 10 Years, Amortized Cost	6,402
More Than 10 years, Amortized Cost	0
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	13,016
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	6,849
5 to 10 Years, Fair Value	6,701
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	0
Total, Fair Value	13,550
Securities Issued By U.S. Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	80,240
1 to 5 Years, Amortized Cost	46,065
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	126,305
Within One Year, Fair Value	80,398
1 to 5 Years, Fair Value	46,204
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
No Stated Maturity, Fair Value	0
Total, Fair Value	126,602
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	17,447
More Than 10 years, Amortized Cost	173,939
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	191,386
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	17,810
More Than 10 years, Fair Value	176,086
No Stated Maturity, Fair Value	0
Total, Fair Value	193,896
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	566
5 to 10 Years, Amortized Cost	1,333,864
More Than 10 years, Amortized Cost	1,264,688
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	2,599,118
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	588
5 to 10 Years, Fair Value	1,341,168
More Than 10 years, Fair Value	1,280,378
No Stated Maturity, Fair Value	0
Total, Fair Value	2,622,134
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	542,761
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	542,761
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	550,055
No Stated Maturity, Fair Value	0
Total, Fair Value	550,055
State And Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One year, Amortized Cost	1,037
1 to 5 Years, Amortized Cost	350
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	2,577
No Stated Maturity, Amortized Cost	0
Total, Amortized Cost	3,964
Within One Year, Fair Value	1,049
1 to 5 Years, Fair Value	352
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	2,638
No Stated Maturity, Fair Value	0
Total, Fair Value	4,039
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	0
No Stated Maturity, Amortized Cost	3,228
Total, Amortized Cost	3,228
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	8,204
Total, Fair Value	8,204
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	3,194
Total, Amortized Cost	20,194
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	15,287
More Than 10 years, Fair Value	1,638
No Stated Maturity, Fair Value	3,133
Total, Fair Value	$ 20,058

Investment Securities (Summar36

Investment Securities (Summary Of Sales Transactions In The Investment Securities Available For Sale Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Investments [Abstract]
Proceeds from sales of investment securities available for sale	$ 243,609	$ 32,419
Gross realized gains	954	725
Gross realized losses	(887)	0
Investment securities gains, net	$ 67	$ 725

Restructuring Charges (Narrativ

Restructuring Charges (Narrative) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016USD ($)branches	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,140	$ (107)
Number of branches closed | branches	4
Gain on disposition of certain branch locations		157
Other operating expenses	$ 25,125	$ 20,522	$ 50
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,100

Restructuring Charges (Schedule

Restructuring Charges (Schedule Of Restructuring And Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Charges [Abstract]
Lease termination charges	$ 44	$ 0
Asset impairment charges	1,045	0
Gain on sale of assets held for sale, net	0	(157)
Professional fees and other charges	51	50
Total restructuring charges, net	$ 1,140	$ (107)

Restructuring Charges (Restruct

Restructuring Charges (Restructuring Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Beginning balance	$ 6,617	$ 8,830
Accruals for lease terminations	44
Payments	(583)	(742)
Ending balance	6,078	8,088
Severance Charges [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	1,930	3,291
Accruals for lease terminations	0
Payments	(397)	(521)
Ending balance	1,533	2,770
Lease Termination Charges [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	4,687	5,539
Accruals for lease terminations	44
Payments	(186)	(221)
Ending balance	$ 4,545	$ 5,318

Loans and Allowance for Loan 40

Loans and Allowance for Loan Losses (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance: individually evaluated for impairment, loans	$ 297,785,000	$ 408,685,000
Provision for loan losses	(9,377,000)	(4,397,000)
Interest income recognized	1,984,000	0	$ 9,522,000
Average recorded investment in impaired loans	298,609,000	427,400,000	358,254,000
Interest income recognized for accruing TDRs		2,600,000
Allowance for loan losses	254,516,000	253,371,000	252,496,000	$ 261,317,000
Troubled Debt Restructurings That Subsequently Defaulted [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Post-default balance for modifications classified as TDRs	$ 0	$ 115,000
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	$ 209,200,000		223,900,000
Allowance for loan losses	12,200,000		$ 12,600,000
Minimum [Member] | Accruing TDRs With Modifications And Renewals Completed [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial-type impaired loans	$ 1,000,000

Loans and Allowance for Loan 41

Loans and Allowance for Loan Losses (Schedule Of Current, Accruing Past Due And Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	$ 22,545,515	$ 22,243,382
Accruing 30-89 Days Past Due	60,638	45,291
Accruing 90 Days or Greater Past Due	3,214	2,621
Total Accruing Past Due	63,852	47,912
Non-accrual	178,167	168,370
Total loans	22,787,534	22,459,664	$ 21,135,581
Deferred fees and costs, net	29,300	30,100	$ 29,400
Commercial Real Estate [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	7,520,193	7,308,461
Accruing 30-89 Days Past Due	15,768	9,223
Accruing 90 Days or Greater Past Due	234	135
Total Accruing Past Due	16,002	9,358
Non-accrual	55,523	57,647
Total loans	7,591,718	7,375,466
Investment Properties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	5,954,011	5,726,307
Accruing 30-89 Days Past Due	9,484	2,284
Accruing 90 Days or Greater Past Due	0	0
Total Accruing Past Due	9,484	2,284
Non-accrual	23,749	23,040
Total loans	5,987,244	5,751,631
1-4 Family Properties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,113,140	1,086,612
Accruing 30-89 Days Past Due	3,860	6,300
Accruing 90 Days or Greater Past Due	234	103
Total Accruing Past Due	4,094	6,403
Non-accrual	17,358	16,839
Total loans	1,134,592	1,109,854
Land Acquisition [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	453,042	495,542
Accruing 30-89 Days Past Due	2,424	639
Accruing 90 Days or Greater Past Due	0	32
Total Accruing Past Due	2,424	671
Non-accrual	14,416	17,768
Total loans	469,882	513,981
Commercial and Industrial [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	10,723,825	10,703,646
Accruing 30-89 Days Past Due	24,984	17,476
Accruing 90 Days or Greater Past Due	686	880
Total Accruing Past Due	25,670	18,356
Non-accrual	81,894	69,430
Total loans	10,831,389	10,791,432
Commercial, Financial and Agricultural [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	6,477,031	6,410,338
Accruing 30-89 Days Past Due	18,403	12,222
Accruing 90 Days or Greater Past Due	425	785
Total Accruing Past Due	18,828	13,007
Non-accrual	63,312	49,137
Total loans	6,559,171	6,472,482
Owner-Occupied [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	4,246,794	4,293,308
Accruing 30-89 Days Past Due	6,581	5,254
Accruing 90 Days or Greater Past Due	261	95
Total Accruing Past Due	6,842	5,349
Non-accrual	18,582	20,293
Total loans	4,272,218	4,318,950
Retail [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	4,301,497	4,231,275
Accruing 30-89 Days Past Due	19,886	18,592
Accruing 90 Days or Greater Past Due	2,294	1,606
Total Accruing Past Due	22,180	20,198
Non-accrual	40,750	41,293
Total loans	4,364,427	4,292,766
Home Equity Lines [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,647,483	1,667,552
Accruing 30-89 Days Past Due	5,321	5,882
Accruing 90 Days or Greater Past Due	170	0
Total Accruing Past Due	5,491	5,882
Non-accrual	16,432	16,480
Total loans	1,669,406	1,689,914
Consumer Mortgages [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,937,378	1,907,644
Accruing 30-89 Days Past Due	10,415	8,657
Accruing 90 Days or Greater Past Due	644	134
Total Accruing Past Due	11,059	8,791
Non-accrual	21,756	22,248
Total loans	1,970,193	1,938,683
Credit Cards [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	229,613	237,742
Accruing 30-89 Days Past Due	1,470	1,663
Accruing 90 Days or Greater Past Due	1,471	1,446
Total Accruing Past Due	2,941	3,109
Non-accrual	0	0
Total loans	232,554	240,851
Other Retail Loans [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	487,023	418,337
Accruing 30-89 Days Past Due	2,680	2,390
Accruing 90 Days or Greater Past Due	9	26
Total Accruing Past Due	2,689	2,416
Non-accrual	2,562	2,565
Total loans	$ 492,274	$ 423,318

Loans and Allowance for Loan 42

Loans and Allowance for Loan Losses (Loan Portfolio Credit Exposure) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 22,787,534	$ 22,459,664	$ 21,135,581
Accrual substandard loans	288,400	303,700
Deferred fees and costs, net	$ 29,300	30,100	$ 29,400
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	$ 7,591,718	7,375,466
Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,987,244	5,751,631
1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,134,592	1,109,854
Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	469,882	513,981
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,831,389	10,791,432
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,559,171	6,472,482
Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,272,218	4,318,950
Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,364,427	4,292,766
Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,669,406	1,689,914
Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,970,193	1,938,683
Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	232,554	240,851
Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	492,274	423,318
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	21,910,822	21,531,712
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,220,348	6,974,031
Pass [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,810,969	5,560,595
Pass [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,011,558	976,601
Pass [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	397,821	436,835
Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,384,656	10,322,112
Pass [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,301,436	6,203,481
Pass [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,083,220	4,118,631
Pass [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,305,818	4,235,569
Pass [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,645,741	1,666,586
Pass [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,941,082	1,910,649
Pass [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	231,083	239,405
Pass [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	487,912	418,929
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	410,177	455,917
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	205,829	225,238
Special Mention [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	104,404	114,705
Special Mention [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	56,557	64,325
Special Mention [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,868	46,208
Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	204,348	230,679
Special Mention [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	131,577	152,189
Special Mention [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	72,771	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	432,471	441,853
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	158,012	168,631
Substandard [Member] | Investment Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,871	76,331
Substandard [Member] | 1-4 Family Properties [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	59,284	61,726
Substandard [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,857	30,574
Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	221,505	221,930
Substandard [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	107,164	100,658
Substandard [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	114,341	121,272
Substandard [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	52,954	51,292
Substandard [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	20,906	20,456
Substandard [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	27,167	26,041
Substandard [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	603	480
Substandard [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,278	4,315
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	29,917	23,900
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,529	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	7,193	7,202
Doubtful [Member] | Land Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	336	364
Doubtful [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	19,582	13,428
Doubtful [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	18,155	13,330
Doubtful [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,427	98
Doubtful [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,806	2,906
Doubtful [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,109	1,206
Doubtful [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,697	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	0	0
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,147	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	1,298	3,283
Loss [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	839	2,824
Loss [Member] | Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	459	459
Loss [Member] | Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,849	2,999
Loss [Member] | Home Equity Lines [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,650	1,666
Loss [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	247	293
Loss [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	868	966
Loss [Member] | Other Retail Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 84	$ 74

Loans and Allowance for Loan 43

Loans and Allowance for Loan Losses (Schedule Of Allowances For Loan Losses And Recorded Investment In Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	$ 252,496	$ 261,317
Charge-offs	(11,315)	(20,624)
Recoveries	3,958	8,281
Provision for loan losses	9,377	4,397
Ending balance, allowance	254,516	253,371
Ending balance: individually evaluated for impairment, allowance	32,973	29,006
Ending balance: collectively evaluated for impairment, allowance	221,543	224,365
Total loans	22,787,534	21,135,581	$ 22,459,664
Ending balance: individually evaluated for impairment, loans	297,785	408,685
Ending balance: collectively evaluated for impairment, loans	22,489,749	20,726,896
Deferred fees and costs, net	29,300	29,400	$ 30,100
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	87,133	101,471
Charge-offs	(1,822)	(7,440)
Recoveries	1,293	3,941
Provision for loan losses	(2,047)	(3,764)
Ending balance, allowance	84,557	94,208
Ending balance: individually evaluated for impairment, allowance	17,603	18,558
Ending balance: collectively evaluated for impairment, allowance	66,954	75,650
Total loans	7,591,718	6,898,159
Ending balance: individually evaluated for impairment, loans	136,826	237,167
Ending balance: collectively evaluated for impairment, loans	7,454,892	6,660,992
Commercial and Industrial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	122,989	118,110
Charge-offs	(5,525)	(5,272)
Recoveries	1,264	2,266
Provision for loan losses	6,150	2,702
Ending balance, allowance	124,878	117,806
Ending balance: individually evaluated for impairment, allowance	14,033	9,411
Ending balance: collectively evaluated for impairment, allowance	110,845	108,395
Total loans	10,831,389	10,316,689
Ending balance: individually evaluated for impairment, loans	123,557	130,197
Ending balance: collectively evaluated for impairment, loans	10,707,832	10,186,492
Retail [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance, allowance	42,374	41,736
Charge-offs	(3,968)	(7,912)
Recoveries	1,401	2,074
Provision for loan losses	5,274	5,459
Ending balance, allowance	45,081	41,357
Ending balance: individually evaluated for impairment, allowance	1,337	1,037
Ending balance: collectively evaluated for impairment, allowance	43,744	40,320
Total loans	4,364,427	3,920,733
Ending balance: individually evaluated for impairment, loans	37,402	41,321
Ending balance: collectively evaluated for impairment, loans	$ 4,327,025	$ 3,879,412

Loans and Allowance for Loan 44

Loans and Allowance for Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 31,587,000		$ 35,108,000
Recorded Investment, With allowance recorded	266,198,000		266,692,000
Recorded Investment	297,785,000		301,800,000
Unpaid Principal Balance, With no related allowance recorded	49,998,000		78,312,000
Unpaid Principal Balance, With allowance recorded	272,786,000		270,004,000
Unpaid Principal Balance	322,784,000		348,316,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	32,973,000		30,435,000
Related Allowance	32,973,000		30,435,000
Average Recorded Investment, With no related allowance recorded	33,003,000		50,030,000
Average Recorded Investment, With allowance recorded	265,606,000		308,224,000
Average Recorded Investment	298,609,000	$ 427,400,000	358,254,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	1,984,000		9,522,000
Interest Income Recognized	1,984,000	$ 0	9,522,000
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	14,052,000		20,109,000
Recorded Investment, With allowance recorded	122,774,000		137,849,000
Recorded Investment	136,826,000		157,958,000
Unpaid Principal Balance, With no related allowance recorded	27,271,000		57,525,000
Unpaid Principal Balance, With allowance recorded	125,617,000		138,419,000
Unpaid Principal Balance	152,888,000		195,944,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	17,603,000		18,969,000
Related Allowance	17,603,000		18,969,000
Average Recorded Investment, With no related allowance recorded	16,869,000		28,068,000
Average Recorded Investment, With allowance recorded	130,537,000		169,694,000
Average Recorded Investment	147,406,000		197,762,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	901,000		4,685,000
Interest Income Recognized	901,000		4,685,000
Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	8,557,000		10,051,000
Recorded Investment, With allowance recorded	53,449,000		62,305,000
Recorded Investment	62,006,000		72,356,000
Unpaid Principal Balance, With no related allowance recorded	11,192,000		12,946,000
Unpaid Principal Balance, With allowance recorded	53,475,000		62,305,000
Unpaid Principal Balance	64,667,000		75,251,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	9,158,000		10,070,000
Related Allowance	9,158,000		10,070,000
Average Recorded Investment, With no related allowance recorded	9,359,000		11,625,000
Average Recorded Investment, With allowance recorded	58,015,000		73,211,000
Average Recorded Investment	67,374,000		84,836,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	656,000		2,131,000
Interest Income Recognized	656,000		2,131,000
1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,504,000		1,507,000
Recorded Investment, With allowance recorded	49,048,000		51,376,000
Recorded Investment	50,552,000		52,883,000
Unpaid Principal Balance, With no related allowance recorded	5,525,000		5,526,000
Unpaid Principal Balance, With allowance recorded	49,048,000		51,376,000
Unpaid Principal Balance	54,573,000		56,902,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	5,899,000		6,184,000
Related Allowance	5,899,000		6,184,000
Average Recorded Investment, With no related allowance recorded	1,505,000		2,546,000
Average Recorded Investment, With allowance recorded	49,434,000		61,690,000
Average Recorded Investment	50,939,000		64,236,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	117,000		1,618,000
Interest Income Recognized	117,000		1,618,000
Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	3,991,000		8,551,000
Recorded Investment, With allowance recorded	20,277,000		24,168,000
Recorded Investment	24,268,000		32,719,000
Unpaid Principal Balance, With no related allowance recorded	10,554,000		39,053,000
Unpaid Principal Balance, With allowance recorded	23,094,000		24,738,000
Unpaid Principal Balance	33,648,000		63,791,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	2,546,000		2,715,000
Related Allowance	2,546,000		2,715,000
Average Recorded Investment, With no related allowance recorded	6,005,000		13,897,000
Average Recorded Investment, With allowance recorded	23,088,000		34,793,000
Average Recorded Investment	29,093,000		48,690,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	128,000		936,000
Interest Income Recognized	128,000		936,000
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	15,677,000		13,155,000
Recorded Investment, With allowance recorded	107,880,000		92,444,000
Recorded Investment	123,557,000		105,599,000
Unpaid Principal Balance, With no related allowance recorded	19,618,000		18,816,000
Unpaid Principal Balance, With allowance recorded	111,625,000		94,062,000
Unpaid Principal Balance	131,243,000		112,878,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	14,033,000		10,477,000
Related Allowance	14,033,000		10,477,000
Average Recorded Investment, With no related allowance recorded	14,285,000		20,394,000
Average Recorded Investment, With allowance recorded	98,951,000		99,063,000
Average Recorded Investment	113,236,000		119,457,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	633,000		2,939,000
Interest Income Recognized	633,000		2,939,000
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	6,185,000		4,393,000
Recorded Investment, With allowance recorded	58,312,000		42,914,000
Recorded Investment	64,497,000		47,307,000
Unpaid Principal Balance, With no related allowance recorded	8,585,000		7,606,000
Unpaid Principal Balance, With allowance recorded	61,865,000		44,374,000
Unpaid Principal Balance	70,450,000		51,980,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	12,399,000		8,339,000
Related Allowance	12,399,000		8,339,000
Average Recorded Investment, With no related allowance recorded	5,715,000		5,737,000
Average Recorded Investment, With allowance recorded	49,547,000		43,740,000
Average Recorded Investment	55,262,000		49,477,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	189,000		1,125,000
Interest Income Recognized	189,000		1,125,000
Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	9,492,000		8,762,000
Recorded Investment, With allowance recorded	49,568,000		49,530,000
Recorded Investment	59,060,000		58,292,000
Unpaid Principal Balance, With no related allowance recorded	11,033,000		11,210,000
Unpaid Principal Balance, With allowance recorded	49,760,000		49,688,000
Unpaid Principal Balance	60,793,000		60,898,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	1,634,000		2,138,000
Related Allowance	1,634,000		2,138,000
Average Recorded Investment, With no related allowance recorded	8,570,000		14,657,000
Average Recorded Investment, With allowance recorded	49,404,000		55,323,000
Average Recorded Investment	57,974,000		69,980,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	444,000		1,814,000
Interest Income Recognized	444,000		1,814,000
Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,858,000		1,844,000
Recorded Investment, With allowance recorded	35,544,000		36,399,000
Recorded Investment	37,402,000		38,243,000
Unpaid Principal Balance, With no related allowance recorded	3,109,000		1,971,000
Unpaid Principal Balance, With allowance recorded	35,544,000		37,523,000
Unpaid Principal Balance	38,653,000		39,494,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	1,337,000		989,000
Related Allowance	1,337,000		989,000
Average Recorded Investment, With no related allowance recorded	1,849,000		1,568,000
Average Recorded Investment, With allowance recorded	36,118,000		39,467,000
Average Recorded Investment	37,967,000		41,035,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	450,000		1,898,000
Interest Income Recognized	450,000		1,898,000
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,044,000		1,030,000
Recorded Investment, With allowance recorded	9,772,000		9,575,000
Recorded Investment	10,816,000		10,605,000
Unpaid Principal Balance, With no related allowance recorded	1,044,000		1,030,000
Unpaid Principal Balance, With allowance recorded	9,772,000		9,575,000
Unpaid Principal Balance	10,816,000		10,605,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	165,000		206,000
Related Allowance	165,000		206,000
Average Recorded Investment, With no related allowance recorded	1,035,000		573,000
Average Recorded Investment, With allowance recorded	9,618,000		8,318,000
Average Recorded Investment	10,653,000		8,891,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	116,000		346,000
Interest Income Recognized	116,000		346,000
Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	814,000		814,000
Recorded Investment, With allowance recorded	21,224,000		22,173,000
Recorded Investment	22,038,000		22,987,000
Unpaid Principal Balance, With no related allowance recorded	2,065,000		941,000
Unpaid Principal Balance, With allowance recorded	21,224,000		23,297,000
Unpaid Principal Balance	23,289,000		24,238,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	1,029,000		651,000
Related Allowance	1,029,000		651,000
Average Recorded Investment, With no related allowance recorded	814,000		995,000
Average Recorded Investment, With allowance recorded	21,821,000		26,044,000
Average Recorded Investment	22,635,000		27,039,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	262,000		1,229,000
Interest Income Recognized	262,000		1,229,000
Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0
Recorded Investment, With allowance recorded	0		0
Recorded Investment	0		0
Unpaid Principal Balance, With no related allowance recorded	0		0
Unpaid Principal Balance, With allowance recorded	0		0
Unpaid Principal Balance	0		0
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	0		0
Related Allowance	0		0
Average Recorded Investment, With no related allowance recorded	0		0
Average Recorded Investment, With allowance recorded	0		0
Average Recorded Investment	0		0
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	0		0
Interest Income Recognized	0		0
Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0
Recorded Investment, With allowance recorded	4,548,000		4,651,000
Recorded Investment	4,548,000		4,651,000
Unpaid Principal Balance, With no related allowance recorded	0		0
Unpaid Principal Balance, With allowance recorded	4,548,000		4,651,000
Unpaid Principal Balance	4,548,000		4,651,000
Related Allowance, With no related allowance recorded	0		0
Related Allowance, With allowance recorded	143,000		132,000
Related Allowance	143,000		132,000
Average Recorded Investment, With no related allowance recorded	0		0
Average Recorded Investment, With allowance recorded	4,679,000		5,105,000
Average Recorded Investment	4,679,000		5,105,000
Interest Income Recognized, With no related allowance recorded	0		0
Interest Income Recognized, With allowance recorded	72,000		323,000
Interest Income Recognized	$ 72,000		$ 323,000

Loans and Allowance for Loan 45

Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Contract	Mar. 31, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	61	74
Recorded Investment	$ 20,404	$ 46,434
Net charge-offs	$ 0	$ 4,000
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	15	19
Recorded Investment	$ 2,355	$ 39,328
Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	3
Recorded Investment	$ 585	$ 20,536
1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	7	13
Recorded Investment	$ 1,235	$ 17,829
Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	6	3
Recorded Investment	$ 535	$ 963
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	34	27
Recorded Investment	$ 17,384	$ 4,644
Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	30	25
Recorded Investment	$ 15,401	$ 2,905
Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4	2
Recorded Investment	$ 1,983	$ 1,739
Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	12	28
Recorded Investment	$ 665	$ 2,462
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	11
Recorded Investment	$ 196	$ 1,110
Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	3	11
Recorded Investment	$ 154	$ 1,031
Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0
Recorded Investment	$ 0	$ 0
Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	7	6
Recorded Investment	$ 315	$ 321
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	14,823
Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	14,823
Principal Forgiveness [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	14,823
Principal Forgiveness [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Principal Forgiveness [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Below Market Interest Rate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	14,961	24,274
Below Market Interest Rate [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	832	20,043
Below Market Interest Rate [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	437	16,932
Below Market Interest Rate [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	395	2,856
Below Market Interest Rate [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	255
Below Market Interest Rate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	13,549	2,754
Below Market Interest Rate [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	12,014	1,015
Below Market Interest Rate [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,535	1,739
Below Market Interest Rate [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	580	1,477
Below Market Interest Rate [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	196	975
Below Market Interest Rate [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	154	245
Below Market Interest Rate [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Below Market Interest Rate [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	230	257
Term Extensions and or Other Concessions [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	5,443	7,337
Term Extensions and or Other Concessions [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,523	4,462
Term Extensions and or Other Concessions [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	148	3,604
Term Extensions and or Other Concessions [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	840	150
Term Extensions and or Other Concessions [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	535	708
Term Extensions and or Other Concessions [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,835	1,890
Term Extensions and or Other Concessions [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,387	1,890
Term Extensions and or Other Concessions [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	448	0
Term Extensions and or Other Concessions [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	85	985
Term Extensions and or Other Concessions [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	135
Term Extensions and or Other Concessions [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	786
Term Extensions and or Other Concessions [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0	0
Term Extensions and or Other Concessions [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	$ 85	$ 64

Other Comprehensive Income (L46

Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (740)	$ (29,819)	$ (3,651)	$ (12,605)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(12,336)	(12,504)	(12,755)	(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)	10,747	$ (18,222)	$ 8,198	$ (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 (L47

Other Comprehensive Income (Loss) (Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	$ (29,819)	$ (12,605)
Other comprehensive income (loss) before reclassifications	29,010	9,355
Amounts reclassified from accumulated other comprehensive income (loss)	69	(401)
Net current period other comprehensive income (loss)	29,079	8,954
Ending balance	(740)	(3,651)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	(12,504)	(12,824)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	168	69
Net current period other comprehensive income (loss)	168	69
Ending balance	(12,336)	(12,755)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	(18,222)	(713)
Other comprehensive income (loss) before reclassifications	29,010	9,355
Amounts reclassified from accumulated other comprehensive income (loss)	(41)	(444)
Net current period other comprehensive income (loss)	28,969	8,911
Ending balance	10,747	8,198
Post-Retirement Unfunded Health Benefit [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Beginning balance	907	932
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(58)	(26)
Net current period other comprehensive income (loss)	(58)	(26)
Ending balance	$ 849	$ 906

Other Comprehensive Income (L48

Other Comprehensive Income (Loss) (Reclassifications out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (31,130)	$ (28,138)
Loss on early extinguishment of debt	(4,735)	0
Income tax (expense) benefit	(31,199)	(31,849)
Investment securities gains, net	67	725
Salaries and other personnel expense	(188,233)	(178,908)
Net income available to common shareholders	49,972	51,404
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(76)	(112)
Loss on early extinguishment of debt	(197)	0
Income tax (expense) benefit	105	43
Net income available to common shareholders	(168)	(69)
Net Unrealized Gains (Losses) on Investment Securities Available for Sale [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	(26)	(281)
Investment securities gains, net	67	725
Net income available to common shareholders	41	444
Post-Retirement Unfunded Health Benefit [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	(36)	(16)
Salaries and other personnel expense	94	42
Net income available to common shareholders	$ 58	$ 26

Fair Value Accounting (Financia

Fair Value Accounting (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 4,801	$ 5,097
Investment securities available for sale	3,582,244	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	193,896	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	550,055	529,597
State And Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	4,039	4,434
Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	20,058	19,803
U.S. Treasury Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	43,706	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	2,622,134	2,630,419
Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	8,204	$ 9,672
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	15
Investment securities available for sale	55,044	$ 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	4,786	5,097
Investment securities available for sale	3,525,562	3,529,971
Private equity investments	750	870
Derivative assets	35,958	27,139
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	1,638	1,745
Private equity investments	26,757	27,148
Derivative assets	0	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,801	5,097
Mortgage loans held for sale	62,867	59,275
Investment securities available for sale	3,582,244	3,587,818
Private equity investments	27,507	28,018
Mutual funds held in Rabbi Trusts	11,035	10,664
Derivative assets	35,958	27,139
Trading account liabilities	1,573
Derivative liabilities	36,409	27,445
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	2,727	2,922
Investment securities available for sale	193,896	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	395	1,078
Investment securities available for sale	550,055	529,597
Fair Value, Measurements, Recurring [Member] | State And Municipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,481	1,097
Investment securities available for sale	4,039	4,434
Fair Value, Measurements, Recurring [Member] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	198
Investment securities available for sale	20,058	19,803
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	43,706	43,357
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	13,550	13,623
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	126,602	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	2,622,134	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	8,204	9,672
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	33,788	25,580
Derivative liabilities	34,232	26,030
Fair Value, Measurements, Recurring [Member] | Mortgage Derivatives [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2,170	1,559
Derivative liabilities	762
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	15	0
Mortgage loans held for sale	0	0
Investment securities available for sale	55,044	56,102
Private equity investments	0	0
Mutual funds held in Rabbi Trusts	11,035	10,664
Derivative assets	0	0
Trading account liabilities	0
Derivative liabilities	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] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	15
Investment securities available for sale	3,134	3,073
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	43,706	43,357
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | US Government Agencies Debt 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] | 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	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	8,204	9,672
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	4,786	5,097
Mortgage loans held for sale	62,867	59,275
Investment securities available for sale	3,525,562	3,529,971
Private equity investments	750	870
Mutual funds held in Rabbi Trusts	0	0
Derivative assets	35,958	27,139
Trading account liabilities	1,573
Derivative liabilities	34,994	26,030
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	2,727	2,922
Investment securities available for sale	193,896	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	395	1,078
Investment securities available for sale	550,055	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	1,481	1,097
Investment securities available for sale	4,039	4,434
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	183
Investment securities available for sale	15,286	14,985
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] | US Government Agencies Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	13,550	13,623
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	126,602	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	2,622,134	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] | Interest Rate Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	33,788	25,580
Derivative liabilities	34,232	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	2,170	1,559
Derivative liabilities	762
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	1,638	1,745
Private equity investments	26,757	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] | 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] | Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	1,638	1,745
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] | US Government Agencies Debt 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	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] | 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
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ 971	$ 410
Aggregate fair value	62,867		$ 59,275
Unpaid principal balance	60,798		58,177
Fair value less aggregate unpaid principal balance	$ 2,069		$ 1,098

Fair Value Accounting (Change51

Fair Value Accounting (Changes In Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Investment Securities Available for Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,745	$ 1,645
Included in earnings	0	0
Unrealized gains (losses) included in other comprehensive income	(107)	9
Settlements	0	0
Ending balance	1,638	1,654
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
Private Equity Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	27,148	27,367
Included in earnings	(391)	(286)
Unrealized gains (losses) included in other comprehensive income	0	0
Settlements	0	0
Ending balance	26,757	27,081
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,	(391)	(286)
Visa Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(1,415)	(1,401)
Included in earnings	(360)	(375)
Unrealized gains (losses) included in other comprehensive income	0	0
Settlements	360	351
Ending balance	(1,415)	(1,425)
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)	$ (375)

Fair Value Accounting (Assets A

Fair Value Accounting (Assets And Liabilities Measured At Fair Value On A Non-Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	$ 297,785	$ 301,800
Other real estate	38,462	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		425
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	4,452	11,264
Other loans held for sale	0	425
Other real estate	11,910	23,519
Other assets held for sale	1,200	3,425
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent 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]
Collateral dependent 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]
Collateral dependent impaired loans	4,452	11,264
Other loans held for sale	0	425
Other real estate	11,910	23,519
Other assets held for sale	$ 1,200	$ 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
	Mar. 31, 2016	Mar. 31, 2015
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 1,270	$ 1,045
Other Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	1,643	6,681
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 1,032	$ 0

Fair Value Accounting (Fair Val

Fair Value Accounting (Fair Value Inputs, Assets, Quantitative Information) (Details) - Level 3 [Member]	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of marketability	0.00%	0.00%
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of marketability	10.00%	10.00%
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of marketability	0.00%	0.00%
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	4.75%	4.27%
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	5.75%	5.27%
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	5.24%	4.77%
Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [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 [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	83.00%	100.00%
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 [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	29.00%	51.00%
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 [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value		0.00%
Estimated selling costs		0.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value		11.00%
Estimated selling costs		10.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value		7.00%
Estimated selling costs		7.00%
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [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 [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 [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	7.00%	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]
Discount to appraised value	0.00%	0.00%
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]
Discount to appraised value	100.00%	75.00%
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]
Discount to appraised value	85.00%	42.00%
Estimated selling costs	7.00%	7.00%

Fair Value Accounting (Carrying

Fair Value Accounting (Carrying And Estimated Fair Values Of Financial Instruments Carried On Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 352,060	$ 367,092
Interest bearing funds with Federal Reserve Bank	908,527	829,887
Interest earning deposits with banks	21,686	17,387
Federal funds sold and securities purchased under resale agreements	76,300	69,819
Trading account assets	4,801	5,097
Mortgage loans held for sale	62,867	59,275
Investment securities available for sale	3,582,244	3,587,818
Loans, net	22,503,687	22,177,069
Non-interest bearing deposits	6,896,547	6,732,970
Federal funds purchased and securities sold under repurchase agreements	203,979	177,025
Long-term debt	2,360,865	2,186,893
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	352,060	367,092
Interest bearing funds with Federal Reserve Bank	908,527	829,887
Interest earning deposits with banks	21,686	17,387
Federal funds sold and securities purchased under resale agreements	76,300	$ 69,819
Trading account assets	15
Mortgage loans held for sale	0
Other loans held for sale		$ 0
Investment securities available for sale	55,044	56,102
Private equity investments	0	0
Mutual funds held in Rabbi Trusts	11,035	10,664
Loans, net	0	0
Derivative asset positions	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	203,979	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	4,786	5,097
Mortgage loans held for sale	62,867	59,275
Other loans held for sale		0
Investment securities available for sale	3,525,562	3,529,971
Private equity investments	750	870
Mutual funds held in Rabbi Trusts	0	0
Loans, net	0	0
Derivative asset positions	35,958	27,139
Trading account liabilities	1,573	1,032
Non-interest bearing deposits	6,896,547	6,732,970
Interest bearing deposits	16,559,165	16,516,222
Federal funds purchased and securities sold under repurchase agreements	0	0
Long-term debt	2,458,126	2,244,376
Derivative liability positions	34,994	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		425
Investment securities available for sale	1,638	1,745
Private equity investments	26,757	27,148
Mutual funds held in Rabbi Trusts	0	0
Loans, net	22,480,492	22,192,903
Derivative asset positions	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	352,060	367,092
Interest bearing funds with Federal Reserve Bank	908,527	829,887
Interest earning deposits with banks	21,686	17,387
Federal funds sold and securities purchased under resale agreements	76,300	69,819
Trading account assets	4,801	5,097
Mortgage loans held for sale	62,867	59,275
Other loans held for sale		425
Investment securities available for sale	3,582,244	3,587,818
Private equity investments	27,507	28,018
Mutual funds held in Rabbi Trusts	11,035	10,664
Loans, net	22,758,203	22,429,565
Derivative asset positions	35,958	27,139
Trading account liabilities	1,573	1,032
Non-interest bearing deposits	6,896,547	6,732,970
Interest bearing deposits	16,553,381	16,509,691
Federal funds purchased and securities sold under repurchase agreements	203,979	177,025
Long-term debt	2,360,865	2,186,893
Derivative liability positions	36,409	27,445
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	352,060	367,092
Interest bearing funds with Federal Reserve Bank	908,527	829,887
Interest earning deposits with banks	21,686	17,387
Federal funds sold and securities purchased under resale agreements	76,300	69,819
Trading account assets	4,801	5,097
Mortgage loans held for sale	62,867	59,275
Other loans held for sale		425
Investment securities available for sale	3,582,244	3,587,818
Private equity investments	27,507	28,018
Mutual funds held in Rabbi Trusts	11,035	10,664
Loans, net	22,480,492	22,192,903
Derivative asset positions	35,958	27,139
Trading account liabilities	1,573	1,032
Non-interest bearing deposits	6,896,547	6,732,970
Interest bearing deposits	16,559,165	16,516,222
Federal funds purchased and securities sold under repurchase agreements	203,979	177,025
Long-term debt	2,458,126	2,244,376
Derivative liability positions	$ 36,409	$ 27,445

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative [Line Items]
Cash flow hedge gain (loss) to be reclassified within 12 months	$ 259
Deferred loss balance to loss on early extinguishment of debt	(197)
Remaining unamortized deferred gain (loss) balance of all previously terminated cash flow hedges	(324)		$ (597)
Remaining deferred gain (loss) balance on all previously terminated fair value hedges	2,200		4,000
Deferred gain balance on terminated fair value hedges expected to be reclassified from long-term debt	1,800
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	(933)	$ 5
Deferred gains (loss) on discontinuation of cash flow hedge reclassified to earnings	515	774
Reclassification of hedge-related basis adjustment as a reduction to loss on early extinguishment of debt	1,300
Fixed Rate Residential Mortgage [Member]
Derivative [Line Items]
Commitments to fund fixed-rate mortgage loans	99,200		88,800
Unrealized gain on fair value of fixed-rate mortgage loans to customers	782	$ 1,100
Sale of outstanding commitments	117,000		95,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount of interest rate swap contracts	1,270,000		$ 10,200
Federal Funds Sold [Member]
Derivative [Line Items]
Federal funds sold	74,000
Federal Funds Sold, Counterparty with CCC [Member]
Derivative [Line Items]
Federal funds sold	$ 21,700

Derivative Instruments (Impact

Derivative Instruments (Impact Of Derivatives On Balance Sheet) (Details) - Not Designated As Hedging Instruments [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Assets [Member]
Derivative [Line Items]
Fair value of derivative assets	$ 35,958	$ 27,139
Other Assets [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of derivative assets	33,788	25,580
Other Assets [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Fair value of derivative assets	2,170	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	36,409	27,445
Other Liabilities [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Fair value of derivative liabilities	34,232	26,030
Other Liabilities [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Fair value of derivative liabilities	762	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
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (145)	$ 923
Other Non-Interest Income [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	6	(179)
Mortgage Banking Income [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (151)	$ 1,102

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
	Mar. 31, 2016	Mar. 31, 2015
Basic Earnings (Loss) Per Share
Net income available to common shareholders	$ 49,972	$ 51,404
Weighted average common shares outstanding (in shares)	127,227	134,933
Net income per common share, basic (in dollars per share)	$ 0.39	$ 0.38
Diluted Earnings (Loss) Per Share
Net income available to common shareholders	$ 49,972	$ 51,404
Weighted average common shares outstanding (in shares)	127,227	134,933
Potentially dilutive shares from outstanding equity-based awards	630	811
Weighted average number of diluted common shares (in shares)	127,857	135,744
Net income per common share, diluted (in dollars per share)	$ 0.39	$ 0.38

Net Income Per Common Share (Na

Net Income Per Common Share (Narrative) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Potentially dilutive shares	2.5	3.1

Share-based Compensation (Detai

Share-based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3.3	$ 3.2
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, shares granted	0	0
Options outstanding	1,600,000
Weighted-average exercise price, options	$ 33.13
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	320,000
Weighted-average exercise price, shares granted during period	$ 26.01
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, shares granted	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
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	1,300,000
Weighted-average exercise price, non-vested shares outstanding	$ 25.29
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%
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%
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%
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%
2013 Omnibus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equivalents authorized	6,200,000
Shares of authorized but unissued common stock reserved for future grants	0
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	1
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 Contingencies62

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Loss Contingencies [Line Items]
Contractual amount net of risk participations	$ 63,000	$ 66,000
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	8,638,140	8,535,148
Standby and Commercial Letters of Credit [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	191,766	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	1,852,670	1,882,130
Unused Credit Card Lines [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,057,833	1,055,181
Commitments under Home Equity Lines of Credit [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,073,028	1,051,386
Commitments to Fund Commercial and Industrial Loans [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	4,168,486	4,094,809
Other Loan Commitments [Member]
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	$ 294,357	$ 284,706

Legal Proceedings (Details)

Legal Proceedings (Details)	Mar. 31, 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