Synovus Financial (SNV) 10-Q 5 Nov 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Oct. 31, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2019
Entity File Number	1-10312
Entity Registrant Name	SYNOVUS FINANCIAL CORP
Entity Incorporation, State or Country Code	GA
Entity Tax Identification Number	58-1134883
Entity Address, Address Line One	1111 Bay Avenue
Entity Address, Address Line Two	Suite 500,
Entity Address, City or Town	Columbus,
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	31901
City Area Code	706
Local Phone Number	649-2311
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		146,544,786
Entity Central Index Key	0000018349
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $1.00 Par Value
Trading Symbol	SNV
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D
Trading Symbol	SNV - PrD
Security Exchange Name	NYSE
Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E
Entity Information [Line Items]
Title of 12(b) Security	Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol	SNV - PrE
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS (un

CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks		$ 611,496	$ 468,426
Interest-bearing funds with Federal Reserve Bank		480,913	641,476
Interest earning deposits with banks		20,086	19,841
Federal funds sold and securities purchased under resale agreements		69,975	13,821
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	[1]	1,182,470	1,143,564
Investment securities available for sale, at fair value		6,892,162	3,991,632
Mortgage loans held for sale, at fair value		129,415	37,129
Loans		36,417,826	25,946,573
Allowance for loan losses		(265,013)	(250,555)
Loans, net		36,152,813	25,696,018
Cash surrender value of bank-owned life insurance		771,458	554,134
Premises and equipment, net		487,053	434,307
Goodwill		487,865	57,315
Other intangible assets		58,572	9,875
Other assets		1,499,374	745,218
Total assets		47,661,182	32,669,192
Deposits:
Non-interest-bearing deposits		9,586,148	7,650,967
Interest-bearing deposits		27,846,922	19,069,355
Total deposits		37,433,070	26,720,322
Federal funds purchased and securities sold under repurchase agreements		197,419	237,692
Other short-term borrowings		2,233,593	650,000
Long-term debt		2,153,600	1,657,157
Other liabilities		774,662	270,419
Total liabilities		42,792,344	29,535,590
Shareholders' Equity
Preferred stock - no par value. Authorized 100,000,000 shares; 22,000,000 shares issued and outstanding at September 30, 2019, 8,000,000 shares issued and outstanding at December 31, 2018		536,550	195,140
Common stock - $1.00 par value. Authorized 342,857,143 shares; 166,201,048 issued at September 30, 2019 and 143,300,449 issued at December 31, 2018; 147,594,000 outstanding at September 30, 2019 and 115,865,510 outstanding at December 31, 2018		166,201	143,300
Additional paid-in capital		3,801,158	3,060,561
Treasury stock, at cost – 18,607,048 shares at September 30, 2019 and 27,434,939 shares at December 31, 2018		(680,081)	(1,014,746)
Accumulated other comprehensive income (loss), net		75,933	(94,420)
Retained earnings		969,077	843,767
Total shareholders’ equity		4,868,838	3,133,602
Total liabilities and shareholders' equity		$ 47,661,182	$ 32,669,192
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	22,000,000	8,000,000
Preferred stock, shares outstanding (in shares)	22,000,000	8,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	342,857,143	342,857,143
Common stock, shares issued (in shares)	166,201,048	143,300,449
Common stock, shares outstanding (in shares)	147,594,000	115,865,510
Treasury stock, shares at cost (in shares)	18,607,048	27,434,939

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018
Interest income:
Loans, including fees	$ 463,437	$ 314,639	$ 1,368,769		$ 900,035
Investment securities available for sale	53,761	24,164	156,493		71,976
Mortgage loans held for sale	978	578	2,122		1,514
Federal Reserve Bank balances	2,288	2,376	8,659		6,944
Other earning assets	2,951	2,185	8,342		6,442
Total interest income	523,415	343,942	1,544,385		986,911
Interest expense:
Deposits	94,082	39,219	274,466		98,195
Federal funds purchased, securities sold under repurchase agreements, and other short-term borrowings	7,843	940	18,599		2,744
Long-term debt	19,393	12,164	54,785		35,492
Total interest expense	121,318	52,323	347,850		136,431
Net interest income	402,097	291,619	1,196,535		850,480
Provision for loan losses	27,562	14,982	63,250	[1]	39,548
Net interest income after provision for loan losses	374,535	276,637	1,133,285		810,932
Non-interest income:
Service charges on deposit accounts	22,952	20,582	65,805		60,521
Fiduciary and asset management fees	14,686	13,462	42,743		40,881
Card fees	12,297	10,608	34,334		31,640
Brokerage revenue	11,071	9,041	30,502		26,125
Mortgage banking income	10,351	5,290	23,313		15,177
Capital markets income	7,396	1,155	21,557		3,826
Income from bank-owned life insurance	5,139	3,771	15,605		11,720
Investment securities losses, net	(3,731)	0	(5,502)		(1,296)
Other non-interest income	8,599	7,759	29,588		23,507
Total non-interest income	88,760	71,668	257,945		212,101
Non-interest expense:
Salaries and other personnel expense	142,516	114,341	424,952		339,924
Net occupancy and equipment expense	41,017	32,088	119,262		96,222
Third-party processing expense	18,528	14,810	55,403		43,822
Professional fees	9,719	6,298	25,379		18,087
FDIC insurance and other regulatory fees	7,242	6,430	21,872		19,765
Advertising expense	5,950	3,735	16,996		14,046
Amortization of intangibles	2,901	292	8,702		875
Merger-related expense	353	6,684	57,493		6,684
Earnout liability adjustments	10,457	11,652	10,457		11,652
Loss on early extinguishment of debt, net	4,592	0	4,592	[1]	0
Other operating expenses	33,035	23,967	87,739		68,454
Total non-interest expense	276,310	220,297	832,847		619,531
Income before income taxes	186,985	128,008	558,383		403,502
Income tax expense	51,259	18,949	146,287		80,095
Net income	135,726	109,059	412,096	[1]	323,407
Less: Preferred stock dividends and redemption charge	8,291	9,729	14,591		14,848
Net income available to common shareholders	$ 127,435	$ 99,330	$ 397,505		$ 308,559
Net income per common share, basic (in dollars per share)	$ 0.84	$ 0.85	$ 2.53		$ 2.61
Net income per common share, diluted (in dollars per share)	$ 0.83	$ 0.84	$ 2.51		$ 2.60
Weighted average common shares outstanding, basic (in shares)	152,238	117,241	156,819		118,096
Weighted average common shares outstanding, diluted (in shares)	154,043	118,095	158,595		118,847
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income, Before-tax Amount	$ 186,985	$ 128,008	$ 558,383		$ 403,502
Net income, Tax Effect	(51,259)	(18,949)	(146,287)		(80,095)
Net income	135,726	109,059	412,096	[1]	323,407
Net unrealized gains (losses) on investment securities available for sale: Before-tax Amount
Reclassification adjustment for net losses realized in net income, Before-tax Amount	3,731	0	5,502		1,296
Net unrealized holding gains (losses) arising during the period, Before-tax Amount	33,919	(24,210)	226,160		(111,131)
Net unrealized gains (losses), Before-tax Amount	37,650	(24,210)	231,662		(109,835)
Net unrealized gains (losses) on investment securities available for sale: Tax Effect
Reclassification adjustment for net losses realized in net income, Tax Effect	(966)	0	(1,425)		(336)
Net unrealized holding gains (losses) arising during the period, Tax Effect	(8,786)	6,270	(58,574)		28,782
Net unrealized gains (losses), Tax Effect	(9,752)	6,270	(59,999)		28,446
Net unrealized gains (losses) on investment securities available for sale: Net of Tax Amount
Reclassification adjustment for net losses realized in net income, Net of Tax Amount	2,765	0	4,077		960
Net unrealized holding gains (losses) arising during the period, Net of Tax Amount	25,133	(17,940)	167,586		(82,349)
Net unrealized gains (losses), Net of Tax Amount	27,898	(17,940)	171,663		(81,389)
Unrealized gains (losses) on derivative instruments designated as cash flow hedges, Before-tax Amount
Unrealized holding gains (losses), net arising during the period, Before-tax Amount	(1,182)	0	(1,182)		0
Unrealized gains (losses) on derivative instruments designated as cash flow hedges, Tax Effect
Unrealized holding gains (losses), net arising during the period, Tax Effect	306	0	306		0
Unrealized gains (losses) on derivative instruments designated as cash flow hedges, Net of Tax Amount
Unrealized holding gains (losses), net arising during the period, Net of Tax Amount	(876)	0	(876)		0
Post-retirement unfunded health benefit: Before-tax Amount
Reclassification adjustment for gains realized in net income, Before-tax Amount	0	(35)	(70)		(103)
Actuarial losses arising during the period, Before-tax Amount	(510)	(46)	(510)		(46)
Net decrease in unrealized gains, Before-tax Amount	(510)	(81)	(580)		(149)
Post-retirement unfunded health benefit: Tax Effect
Reclassification adjustment for gains realized in net income, Tax Effect	0	9	14		31
Actuarial losses arising during the period, Tax Effect	132	12	132		12
Net decrease in unrealized gains, Tax Effect	132	21	146		43
Post-retirement unfunded health benefit: Net of Tax Amount
Reclassification adjustment for gains realized in net income, Net of Tax Amount	0	(26)	(56)		(72)
Actuarial losses arising during the period, Net of Tax Amount	(378)	(34)	(378)		(34)
Net decrease in unrealized gains, Net of Tax Amount	(378)	(60)	(434)		(106)
Other comprehensive income (loss), Before-tax Amount	35,958	(24,291)	229,900		(109,984)
Other comprehensive income (loss), Tax Effect	(9,314)	6,291	(59,547)		28,489
Other comprehensive income (loss), Net of Tax Amount	26,644	(18,000)	170,353		(81,495)
Comprehensive income, Net of Tax Amount	$ 162,370	$ 91,059	$ 582,449		$ 241,912
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands		Total		Series C Preferred Stock	Preferred Stock	Preferred StockSeries C Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained EarningsSeries C Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU | ASU 2014-09		$ (685)									$ (685)
Adoption of ASU | ASU 2018-02		0								$ (7,588)	7,588
Adoption of ASU | ASU 2016-01		0								117	(117)
Balance at Dec. 31, 2017		2,961,566			$ 125,980		$ 142,678	$ 3,043,129	$ (839,674)	(54,754)	544,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		323,407									323,407
Other comprehensive income (loss), net of income taxes		(81,495)								(81,495)
Cash dividends declared on common stock		(88,396)									(88,396)
Cash dividends declared on preferred stock	[1]	(10,828)									(10,828)
Repurchases of stock including costs to repurchase		(134,804)		$ (130,000)		$ (125,980)			(134,804)			$ (4,020)
Issuance of Preferred Stock, net of issuance costs		195,138			195,138
Restricted share unit vesting and taxes paid related to net share settlement		(8,411)					293	(8,355)			(349)
Stock options exercised		2,077					122	1,955
Share-based compensation expense		12,504						12,504
Balance at Sep. 30, 2018		3,040,073			195,138		143,093	3,049,233	(974,478)	(143,720)	770,807
Balance at Jun. 30, 2018		3,167,694			321,118		143,078	3,045,014	(916,484)	(125,720)	700,688
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		109,059									109,059
Other comprehensive income (loss), net of income taxes		(18,000)								(18,000)
Cash dividends declared on common stock		(29,211)									(29,211)
Cash dividends declared on preferred stock	[2]	(5,709)									(5,709)
Repurchases of stock including costs to repurchase		(57,994)		$ (130,000)		$ (125,980)			(57,994)			$ (4,020)
Restricted share unit vesting and taxes paid related to net share settlement		(131)					4	(135)
Stock options exercised		181					11	170
Share-based compensation expense		4,184						4,184
Balance at Sep. 30, 2018		3,040,073			195,138		143,093	3,049,233	(974,478)	(143,720)	770,807
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU		4,270									4,270
Balance at Dec. 31, 2018		3,133,602			195,140		143,300	3,060,561	(1,014,746)	(94,420)	843,767
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		412,096	[3]								412,096
Other comprehensive income (loss), net of income taxes		170,353								170,353
Issuance of common stock, net of issuance costs		704,146					22,043	682,103
Common stock reissued		877,570							1,014,746		(137,176)
Fair value of exchanged equity awards and warrants attributed to purchase price		43,972						43,972
Cash dividends declared on common stock		(138,947)									(138,947)
Cash dividends declared on preferred stock	[1]	(14,591)									(14,591)
Repurchases of stock including costs to repurchase		(688,860)							(688,860)
Issuance of Preferred Stock, net of issuance costs		341,410			341,410
Restricted share unit vesting and taxes paid related to net share settlement		(8,741)					294	(8,709)			(326)
Stock options exercised		11,162					564	10,598
Warrants exercised with net settlement and common stock reissued		0						(8,763)	8,779		(16)
Share-based compensation expense		21,396						21,396
Balance at Sep. 30, 2019		4,868,838			536,550		166,201	3,801,158	(680,081)	75,933	969,077
Balance at Jun. 30, 2019		4,753,816			195,140		166,080	3,801,748	(344,901)	49,289	886,460
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		135,726									135,726
Other comprehensive income (loss), net of income taxes		26,644								26,644
Cash dividends declared on common stock		(44,476)									(44,476)
Cash dividends declared on preferred stock	[2]	(8,291)									(8,291)
Repurchases of stock including costs to repurchase		(343,690)							(343,690)
Issuance of Preferred Stock, net of issuance costs		341,410			341,410
Restricted share unit vesting and taxes paid related to net share settlement		(98)					9	219			(326)
Stock options exercised		2,626					112	2,514
Warrants exercised with net settlement and common stock reissued		0					0	(8,494)	8,510		(16)
Share-based compensation expense		5,171						5,171
Balance at Sep. 30, 2019		$ 4,868,838			$ 536,550		$ 166,201	$ 3,801,158	$ (680,081)	$ 75,933	$ 969,077
[1]	For the nine months ended September 30, 2019, dividends per share were $1.17 and $0.37 for Series D and Series E Preferred Stock, respectively. For the nine months ended September 30, 2018, dividends per share were $1.47 and $0.39 for Series C and Series D Preferred Stock, respectively.
[2]	For the three months ended September 30, 2019, dividends per share were $0.39 and $0.37 for Series D and Series E Preferred Stock, respectively. For the three months ended September 30, 2018, dividends per share were $0.49 and $0.39 for Series C and Series D Preferred Stock, respectively.
[3]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock (in dollars per share)	$ 0.30	$ 0.25	$ 0.90	$ 0.75
Preferred Stock | Series D Preferred Stock
Cash dividends on preferred stock (in dollars per share)	0.39	0.39	1.17	0.39
Preferred Stock | Series E Preferred Stock
Cash dividends on preferred stock (in dollars per share)	$ 0.37		$ 0.37
Preferred Stock | Series C Preferred Stock
Cash dividends on preferred stock (in dollars per share)		$ 0.49		$ 1.47

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	[1]	Sep. 30, 2018
Operating Activities
Net income	$ 412,096		$ 323,407
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	63,250		39,548
Depreciation, amortization, and accretion, net	8,969		41,716
Deferred income tax expense	42,594		9,360
Originations of mortgage loans held for sale	(603,086)		(429,531)
Proceeds from sales of mortgage loans held for sale	527,354		449,651
Gain on sales of mortgage loans held for sale, net	(15,453)		(9,886)
Increase in other assets	(135,448)		(64,765)
Increase in other liabilities	32,345		17,690
Investment securities losses, net	5,502		1,296
Loss on early extinguishment of debt, net	4,592		0
Share-based compensation expense	21,396		12,504
Net cash provided by operating activities	364,111		390,990
Investing Activities
Net cash received in business combination, net of cash paid	201,100		0
Proceeds from maturities and principal collections of investment securities available for sale	780,538		457,151
Proceeds from sales of investment securities available for sale	2,002,137		35,066
Purchases of investment securities available for sale	(3,160,139)		(510,797)
Proceeds from sales of loans	71,530		15,454
Proceeds from sales of other real estate and other assets	15,859		8,676
Net increase in loans excluding loans acquired in business combination	(1,278,772)		(842,383)
Net (purchases) redemptions of Federal Home Loan Bank stock	(75,735)		(26,343)
Net (purchases) redemptions of Federal Reserve Bank stock	(45,856)		8,500
Proceeds from settlements of bank-owned life insurance policies	15,208		1,783
Net increase in premises and equipment	(40,195)		(39,034)
Net cash used in investing activities	(1,514,325)		(891,927)
Financing Activities
Net (decrease) increase in deposits	(185,362)		285,342
Net (decrease) increase in federal funds purchased and securities sold under repurchase agreements	(69,412)		29,955
Net change in other short-term borrowings	1,582,000		378,540
Repayments and redemption of long-term debt	(157,226)		(2,230,052)
Proceeds from issuance of long-term debt, net	497,045		2,280,000
Dividends paid to common shareholders	(123,446)		(77,020)
Dividends paid to preferred shareholders	(9,450)		(10,828)
Proceeds from issuance of preferred stock	341,410		195,138
Redemption of preferred stock	0		(130,000)
Stock options and warrants exercised	11,162		2,077
Repurchase of common stock	(688,860)		(134,804)
Taxes paid related to net share settlement of equity awards	(8,741)		(8,411)
Net cash provided by financing activities	1,189,120		579,937
Increase in cash and cash equivalents including restricted cash	38,906		79,000
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	1,143,564		932,933
Cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	1,182,470		1,011,933
Supplemental Disclosures:
Income taxes paid	88,480		40,340
Interest paid	350,388		122,182
Non-cash Activities
Common stock issued, treasury stock reissued, equity awards/warrants exchanged to acquire FCB	1,625,688		0
Premises and equipment transferred to other assets held for sale	0		785
Loans foreclosed and transferred to other real estate	14,084		11,280
Subtopic 825-10 equity investment securities available for sale transferred to other assets	0		3,162
Dividends declared on common stock during the period but paid after period-end	44,476		29,211
Dividends declared on preferred stock during the period but paid after period-end	$ 5,141		$ 0
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Note 1 - Basis of Presentation General The accompanying unaudited interim consolidated financial statements of Synovus Financial Corp. include the accounts of the Parent Company and its consolidated subsidiaries. Synovus Financial Corp. is a financial services company based in Columbus, Georgia. Through its wholly-owned subsidiary, Synovus Bank, a Georgia state-chartered bank that is a member of the Federal Reserve System, the Company provides commercial and retail banking in addition to a full suite of specialized products and services including private banking, treasury management, wealth management, premium finance, asset-based lending, structured lending, and international banking. Synovus Bank is positioned in markets in the Southeast, with 298 branches and 386 ATMs in Alabama, Florida, Georgia, South Carolina, and Tennessee. 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' 2018 Form 10-K . Reclassifications Prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current periods' presentation. Use of Estimates in the Preparation of Financial Statements In preparing the 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 change relate to the determination of the ALL; estimates of fair value; income taxes; and contingent liabilities including legal matters, among others. Purchased loans Purchased loans are recorded at fair value in accordance with ASC Topic 820, Fair Value Measurement , consistent with the exit price concept on the date of acquisition. Credit risk assumptions and resulting credit discounts are included in the determination of fair value; therefore, no ALL is recorded at the acquisition date. Pursuant to an AICPA letter dated December 18, 2009, the AICPA summarized the SEC staff's view regarding the accounting in subsequent periods for discount accretion associated with loan receivables acquired in a business combination or asset purchase. Regarding the accounting for such loan receivables, in the absence of further standard setting, the AICPA understands the SEC staff would not object to an accounting policy based on contractual cash flows (ASC Topic 310-20, Nonrefundable Fees and Other Costs ) or an accounting policy based on expected cash flows (ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality ). Synovus analogizes to ASC Topic 310-30 to account for the fair value discount. Purchased loans are evaluated upon acquisition as following the ASC 310-30 approach or ASC 310-20. Loans meeting the scope exception of ASC 310-30 (e.g. loans with revolving components) are not permitted to be analogized and will be accounted for in accordance with ASC 310-20. For ASC 310-30 loans, expected cash flows at the acquisition date in excess of the fair value of loans are recorded as interest income over the life of the loans using a level yield method if the timing and amount of the future cash flows is reasonably estimable. Subsequent to the acquisition date, increases in cash flows over those expected at the acquisition date are recognized prospectively as interest income. Decreases in expected cash flows due to credit deterioration are recognized by recording an ALL. Loan removals from pools due to pay-off or charge-off are removed at their carrying amount. The difference between the carrying amount and the amount received to satisfy the loan is recorded in interest income. For ASC 310-20 loans, the difference between the fair value and UPB of the loan at the acquisition date is amortized or accreted to interest income over the contractual life of the loans using the effective interest method. In the event of prepayment, the remaining unamortized amount is recognized in interest income in the quarter of prepayment. Due to the significant difference in accounting for ASC 310-30 loans, Synovus believes inclusion of these loans in certain asset quality ratios that reflect NPAs in the numerator or denominator (or both) results in significant distortion to these ratios. In addition, because loan level charge-offs related to ASC 310-30 loans are not recognized in the financial statements until the cumulative amounts exceed the original loss projections on a pool basis, the net charge-off ratio is inconsistent with the net charge-off ratio for other loan portfolios. The inclusion of ASC 310-30 loans in certain asset quality ratios could result in a lack of comparability across quarters or years, and could impact comparability with other portfolios that were not impacted by ASC 310-30 accounting. Synovus believes that presenting certain loan and asset quality disclosures separately for ASC 310-20 and ASC 310-30 loans, and/or excluding ASC 310-30 loans, where appropriate and indicated within each table, provides better perspective into underlying trends related to the quality of its loan portfolio. Non-interest Income - Revenue from Contracts with Customers within the scope of ASC Topic 606 Synovus' contracts with customers generally do not contain terms that require significant judgment to determine the amount of revenue to recognize. Synovus' policies for recognizing non-interest income within the scope of ASC Topic 606, including the nature and timing of such revenue streams, are included below. Service Charges on Deposit Accounts : Revenue from service charges on deposit accounts is earned through cash management, wire transfer, and other deposit-related services, as well as overdraft, NSF, account management and other deposit-related fees. Revenue is recognized for these services either over time, corresponding with deposit accounts' monthly cycle, or at a point in time for transaction-related services and fees. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers' accounts. Fiduciary and Asset Management Fees : Fiduciary and asset management fees are primarily comprised of fees earned from the management and administration of trusts and other customer assets. Synovus' performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month-end through a direct charge to customers' accounts. Synovus does not earn performance-based incentives. Card Fees: Card fees consist primarily of interchange fees from consumer credit and debit cards processed by card association networks, as well as merchant discounts, and other card-related services. Interchange rates are generally set by the credit card associations and based on purchase volumes and other factors. Interchange fees and merchant discounts are recognized concurrently with the delivery of service on a daily basis as transactions occur. Payment is typically received immediately or in the following month. Card fees are reported net of certain associated expense items including loyalty program expenses and network expenses. Brokerage Revenue: Brokerage revenue consists primarily of commissions. Additionally, brokerage revenue includes advisory fees earned from the management of customer assets. Transactional revenues are based on the size and number of transactions executed at the client's direction and are generally recognized on the trade date with payment received on the settlement date. Advisory fees for brokerage services are recognized and collected monthly and are based upon the month-end market value of the assets under management at a rate predetermined in the contract. Capital Markets Income: Investment banking income, a component of capital markets income, is comprised primarily of securities underwriting fees and remarketing fees. Synovus assists corporate clients in raising capital by offering equity or debt securities to potential investors. The transaction fees are based on a percentage of the total transaction amount. The underwriting and remarketing fees are recognized on the trade date when the securities are sold to third-party investors with payment received on the settlement date. Insurance Revenue (included in other non-interest income on the consolidated statements of income): Insurance revenue primarily consists of commissions received on annuity and life product sales. The commissions are recognized as revenue when the customer executes an insurance policy with the insurance carrier. In some cases, Synovus receives payment of trailing commissions each year when the customer pays its annual premium. Other Fees (included in other non-interest income on the consolidated statements of income): Other fees within the scope of ASC Topic 606 primarily consist of revenues generated from safe deposit box rental fees and lockbox services. Fees are recognized over time, on a monthly basis, as Synovus' performance obligation for services is satisfied. Payment is received upfront for safe deposit box rentals and in the following month for lockbox services. Recently Adopted Accounting Standards ASU 2016-02, Leases (ASC 842) . Synovus adopted ASC 842 prospectively as of January 1, 2019 for existing leasing arrangements. As such, financial information was not updated and the disclosures required under the new standard are not presented for dates and periods prior to January 1, 2019. Refer to the 2018 10-K for lease disclosures surrounding prior period information reported under ASC 840, Leases. For leases that commenced prior to the effective date of ASC 842, Synovus elected the package of practical expedients not to reassess (a) whether existing contracts contain leases, (b) lease classification for existing leases, and (c) initial direct cost for any existing leases as well as the short-term lease recognition exemption for all leases that qualify. Additionally, Synovus did not elect the practical expedient to combine lease and non-lease components for all of our leases. Adoption of the new standard resulted in the recording of ROU assets and lease liabilities of $381.1 million and $391.0 million , respectively, as of January 1, 2019. These amounts were based on the present value of the remaining rental payments for existing leases and include consideration for renewal and termination options available that we were reasonably certain of exercising. The difference between the asset and liability balance is primarily the result of lease liabilities that existed prior to adoption of the new guidance. The adoption of the standard also resulted in a cumulative-effect adjustment, net of income taxes, to the beginning balance of retained earnings of $4.3 million ( $3.9 million of which consisted of deferred gains associated with sale-leaseback transactions that previously did not qualify for recognition). The ROU assets are included in other assets (other than $4.0 million of finance leases included in premises and equipment) on the consolidated balance sheet and the lease liabilities are included in other liabilities. Adoption of the standard did not materially impact our consolidated statements of income and had no impact on cash flows. Synovus determines if an arrangement is a lease at inception in accordance with ASC 842-10-15-3 and classifies leases as either operating or financing from a lessee perspective and operating or direct financing and sales-type from a lessor perspective based on criteria that are largely similar to those applied under ASC 840, Leases , but without explicit bright lines. ROU assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. The determination of future minimum lease payments includes consideration for extension or termination options when it is reasonably certain Synovus will exercise that option as well as rent escalation clauses (including market or index-based escalations) and abatements, capital improvement funding or other lease concessions. As most leases in Synovus' portfolio do not provide an implicit rate, Synovus utilizes a collateralized incremental borrowing rate, referenced to the Federal Home Loan Bank rates for borrowings of similar terms, based on the information available at lease commencement date in determining the present value of future payments. Additionally, for all real estate leases, Synovus applies a portfolio approach (based on lease term) in the application of the discount rate. Determination of the ROU asset also includes prepaid lease payments and amounts recognized relating to favorable or unfavorable lease terms from leases acquired through business combinations. For operating leases, minimum rental expense is recognized on a straight-line basis based on the fixed components of leasing arrangements. Variable lease components represent amounts that are not fixed in nature and are not tied to an index or rate, and are recognized as expense when incurred. For financing leases, rent expense is recognized as amortization expense on a straight-line basis and interest expense using the effective interest method. Additionally, leases with an initial term of 12 months or less are not recorded on the balance sheet; lease expense for these leases is recognized on a straight-line basis over the lease term. Net lease cost is recorded net of sublease income. For leases beginning in 2019 and later, lease components (e.g., base rent) are accounted for separately from non-lease components (e.g., common-area maintenance costs, real estate taxes and insurance costs). ASU 2017-04, Intangibles-Goodwill and Other, Simplifying the Test for Goodwill Impairment : In January 2017, the FASB issued ASU 2017- 04, which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Therefore, any carrying amount which exceeds the reporting unit’s fair value (up to the amount of goodwill recorded) will be recognized as an impairment loss. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those periods. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Synovus elected to early adopt the guidance, effective January 1, 2019. Synovus performed a qualitative assessment as allowed under ASC 350-20-35 during its annual impairment test as of June 30, 2019 and based on the assessment performed, management concluded goodwill was not impaired. As such, the adoption of this ASU had no impact. Recently Issued Accounting Standards Not Yet Adopted ASU 2016-13, Financial Instruments-Credit Losses (CECL). In June 2016, the FASB issued new guidance (CECL) related to credit losses. CECL (and all subsequent ASUs on this topic) replaces the existing incurred loss impairment guidance with an expected credit loss methodology. CECL will require management’s estimate of credit losses over the full remaining expected life of loans and other financial instruments. For Synovus, CECL will apply to loans, unfunded loan commitments, and debt securities available for sale and will be adopted on January 1, 2020. Upon adoption, for non-PCI (non-PCD under CECL) assets, Synovus will record a cumulative-effect adjustment to beginning retained earnings. In addition, CECL provides for a simplified accounting model for purchased financial assets with a more-than-insignificant amount of credit deterioration since their origination (PCD assets). The initial estimate of expected credit losses on PCD assets will be recognized through the ACL with an offset to the cost basis of the related financial asset at adoption. Synovus is continuing its implementation efforts which are led by a cross-functional steering committee. The committee meets periodically to discuss the latest developments and ensure progress compared to the planned timeline. Synovus shifted from limited to more comprehensive parallel testing during the third quarter of 2019. The results continue to be utilized to refine our models and estimation techniques. Documentation of new methodologies and internal controls that will be implemented as part of CECL as well as model validation is also in process. Implementation status updates are provided quarterly to executive management and the Audit Committee of Synovus' Board of Directors. Upon adoption of CECL, Synovus expects the ACL (allowance for credit losses which will apply to debt securities as well as loans and unfunded loan commitments) may increase by 40% to 60% compared to the incurred loss method. The increase is primarily driven by two factors: • the establishment of reserves for acquired loans independent of the fair value discount; and • longer duration consumer loans, due to the difference between loss emergence periods currently used versus the remaining life of the asset required under CECL. We expect the adoption impact of classifying PCI assets as PCD assets to represent approximately half of the ACL increase but, as previously noted, is not expected to impact equity. Additionally, the regulatory transition rules allow for a three-year phase-in of the day-one regulatory capital effects. Due to the combination of these factors, Synovus does not expect CECL adoption to have a material impact on regulatory capital ratios. However, Synovus is still in the process of refining estimates and these estimates involve significant judgment. The estimates provided above are subject to substantial change and will ultimately depend upon the composition of the loan portfolio, as well as economic conditions and forecasts at the time of CECL adoption.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Acquisitions	Note 2 - Acquisitions Acquisition of FCB Financial Holdings, Inc. Effective January 1, 2019 (the "Acquisition Date"), Synovus completed its acquisition of all of the outstanding stock of FCB, a bank holding company based in Weston, Florida, for total consideration of $1.63 billion . Effective January 1, 2019, FCB's wholly-owned banking subsidiary, Florida Community Bank, National Association, merged into Synovus Bank. On the Acquisition Date, the preliminary estimated fair values of FCB included approximately $12.4 billion of identifiable assets, $9.3 billion in loans, and $10.9 billion in deposits. With the addition of FCB and its 51 full service banking centers, Synovus expanded its deposit base in the Southeast. The addition of FCB elevated Synovus' growth profile through a deepened presence in high-growth Florida markets. Conversion of FCB systems occurred during the second quarter of 2019. The results of FCB's operations are included in Synovus' consolidated financial statements since the Acquisition Date. Under the terms of the Merger Agreement, each outstanding share of FCB common stock was converted into the right to receive 1.055 Synovus common shares and cash in lieu of fractional shares. Additionally, under the terms of the Merger Agreement, certain outstanding FCB non-vested equity awards with a fair value of $7.5 million on the Acquisition Date accelerated vesting and converted automatically into the right to receive merger consideration at the merger exchange ratio of 1.055 , or an equivalent amount in cash, of which $3.5 million was allocated to purchase price and the remaining to merger-related compensation expense. In the aggregate, on the Acquisition Date, FCB stockholders received 49.5 million shares of Synovus common stock valued at $1.58 billion and $601 thousand in cash. Also, under the terms of the Merger Agreement, FCB employee and non-employee director outstanding stock options and non-vested restricted share units as well as outstanding FCB warrants were converted into options, restricted share units, and warrants, respectively, to purchase and receive Synovus common stock. The converted options and restricted share units had a fair value of $41.5 million on the Acquisition Date, of which $37.3 million was allocated to purchase price and the remaining to compensation expense and the converted warrants had a fair value of $6.7 million attributed to purchase price. The estimated fair value of the converted restricted share units was based on Synovus' closing stock price on December 31, 2018 of $31.99 , and the estimated fair value of the converted stock options was determined using a Hull-White model in a binomial lattice option pricing framework. The estimated fair value of the converted warrants was determined using the Black-Scholes-Merton model. The acquisition of FCB constituted a business combination and was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations . Accordingly, assets acquired, liabilities assumed, and consideration exchanged were recorded at their estimated fair value on the Acquisition Date. The determination of estimated fair values requires management to make certain estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and may require adjustments. Upon receipt of final fair value estimates during the measurement period, which must be within one year of the acquisition date, Synovus will record any adjustments to the preliminary fair value estimates in the reporting period in which the adjustments are determined. Fair value adjustments based on updated estimates could materially affect the goodwill recorded on the acquisition. Synovus may incur losses on the acquired loans that are materially different from losses Synovus originally projected. Preliminary goodwill of $430.6 million was recorded as a result of the transaction and is not-deductible for tax purposes. FCB's $19.6 million of merger-based success fees payable to third-party advisors and investment bankers were accounted for as part of the business combination and an assumed liability. Since the success fees payable by FCB were contingent upon the consummation of the merger, the expense was recognized as an "on the line" expense with no expense recognition in either the pre- or post-acquisition financials of FCB or Synovus. The following table reflects the consideration transferred for FCB's net assets and the identifiable assets purchased and liabilities assumed at their estimated fair values as of January 1, 2019. These fair value measurement estimates are based on third-party and internal valuations and reflect immaterial measurement period adjustments to the amounts reported as of March 31, 2019 (the income statement impact of such adjustments was immaterial). (in thousands) Consideration transferred: Synovus common stock issued and reissued from treasury attributed to purchase price (1) $ 1,582,133 Cash payments to FCB stockholders attributed to purchase price (2) 173 Fair value of exchanged employee and director equity awards and FCB warrants attributed to purchase price (1) 43,972 Total purchase price $ 1,626,278 Statement of Net Assets Acquired at Fair Value (Preliminary): Assets Cash and cash equivalents $ 201,689 Investment securities available for sale 2,301,001 Loans 9,292,991 Cash surrender value of bank-owned life insurance 216,848 Premises and equipment 45,412 Core deposit intangible 57,400 Other assets 269,304 Total Assets $ 12,384,645 Liabilities Deposits $ 10,930,724 Federal funds purchased and securities sold under repurchase agreements 29,139 Long-term debt 153,236 Other liabilities 75,818 Total Liabilities $ 11,188,917 Fair value of net identifiable assets acquired 1,195,728 Preliminary goodwill $ 430,550 (1) Based on Synovus' closing stock price of $31.99 on December 31, 2018. (2) $173 thousand of cash payment of $601 thousand attributed to purchase price with remaining allocated to compensation expense. The following is a description of the methods used to determine the fair values of significant assets acquired and liabilities assumed presented above. Investment Securities Available for Sale : Fair values of securities were based on quoted market prices from multiple third-party pricing services as well as realized proceeds upon sale of certain corporate bonds. Loans : The Income Approach was utilized in accordance with ASC Topic 820 to estimate the fair value of the loans as of the Acquisition Date. The Income Approach utilizes a discounted cash flow method, to present value the expected cash flows using a market-based discount rate. The discounted cash flow model utilized the contractual loan data and market-based assumptions for prepayment rates, loss rates, and servicing fee, at the loan group level, to project expected loan cash flows as of the Acquisition Date. The acquired loans were grouped together based on the terms of the loans, variable or fixed interest rate, variable index rate, interest or principal only loans, payment plans and amortizing or non-amortizing loans. Total measurement period adjustments to date amounted to an increase in the fair value of loans of $5.2 million based on new information about facts and circumstances that existed prior to the Acquisition Date obtained during a subsequent sale of certain FCB acquired loans (primarily NPLs). Core Deposit Intangible (CDI): This intangible asset represents the value of the relationships with deposit customers. The fair value of the core deposit intangible asset was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative costs of funds, and the interest costs associated with the customer deposits. The CDI is being amortized over its estimated useful life of approximately ten years utilizing an accelerated method. Since the Acquisition Date, Synovus made one measurement period adjustment to decrease the value of the CDI by $10.8 million , resulting in a CDI asset of $57.4 million . Deposits : Certificates of deposit were valued by projecting out the expected cash flows based on the contractual terms of the certificates of deposit. These cash flows were discounted based on a market rate for a certificate of deposit with a corresponding maturity. The fair values for demand and savings deposits were assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. Long-term Debt : Fair values for FHLB borrowings were based on market values and market rates provided by the FHLB. The following table presents consolidated financial information included in Synovus' unaudited consolidated statements of income from the Acquisition Date through September 30, 2019 under the column "Actual from Acquisition Date." Synovus does not provide separate summary financial information of FCB from the Acquisition Date since it would be impracticable to do so as certain systems and processes were integrated during the second quarter of 2019. The following table also presents unaudited pro forma information as if the acquisition occurred on January 1, 2018 under the "Pro Forma" column. The unaudited pro forma results include the estimated impact of amortizing and accreting certain estimated purchase accounting adjustments such as intangible assets as well as fair value adjustments to loans and deposits. Merger-related expenses that occurred at the effective time of the Merger, or subsequent to the Merger are not reflected in the unaudited pro forma amounts. Cost savings are also not reflected in the unaudited pro forma amounts for the nine months ended September 30, 2018. The pro forma information does not necessarily reflect the results of operations that would have occurred had Synovus merged with FCB at the beginning of 2018. (in thousands) Actual from Acquisition Date (January 1, 2019) through September 30, 2019 (1) Pro Forma for Nine Months Ended September 30, 2018 Net interest income $ 1,196,535 $ 1,162,146 Non-interest income 257,945 236,042 Income before income taxes (1) 558,383 604,101 Net income available to common shareholders (1) 397,505 463,984 (1) Actual results for the nine months ended September 30, 2019 include pre-tax merger-related expense of $57.5 million . In connection with the FCB acquisition, Synovus incurred merger-related expense totaling $0.4 million and $57.5 million for the three and nine months ended September 30, 2019 , primarily related to employment compensation agreements, severance, professional services, and contract termination charges, including the payment of $21.8 million related to employment agreements of certain FCB executives. Merger-related expense for the three and nine months ended September 30, 2019 is presented in the table below: (in thousands) Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Employment compensation agreements, severance, and other employee benefit costs $ — $ 34,762 Professional fees 131 17,122 All other expense (1) 222 5,609 Total merger-related expense $ 353 $ 57,493 (1) Primarily relates to fees associated with lease exit accruals, asset impairments related to the integration, and contract termination charges. Acquisition of Global One On October 1, 2016, Synovus completed its acquisition of all of the outstanding stock of Global One. Under the terms of the merger agreement, the purchase price included additional annual payments ("Earnout Payments") to Global One's former shareholders over a three to five-year period, with amounts based on a percentage of "Global One Earnings," as defined in the merger agreement. The Earnout Payments consist of shares of Synovus common stock as well as a smaller cash consideration component. During the three and nine months ended September 30, 2019 and 2018, Synovus recorded $10.5 million and $11.7 million , respectively, in increases to the earnout liability due to increased earnings projections of Global One. The total fair value of the earnout liability at September 30, 2019 was $24.8 million . During the fourth quarter of 2018, Synovus issued the second annual Earnout Payment of 199 thousand shares of Synovus common stock valued at $7.4 million and $1.2 million

Investment Securities Available

Investment Securities Available for Sale	9 Months Ended
	Sep. 30, 2019
Investments [Abstract]
Investment Securities Available for Sale	Note 3 - Investment Securities Available for Sale The amortized cost, gross unrealized gains and losses, and estimated fair values of investment securities available for sale at September 30, 2019 and December 31, 2018 are summarized below. September 30, 2019 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 19,782 $ — $ — $ 19,782 U.S. Government agency securities 35,497 1,388 (8 ) 36,877 Mortgage-backed securities issued by U.S. Government agencies 69,141 730 (190 ) 69,681 Mortgage-backed securities issued by U.S. Government sponsored enterprises 4,970,420 99,289 (4,208 ) 5,065,501 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 656,311 9,612 (1 ) 665,922 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises 360,065 19,606 — 379,671 State and municipal securities 2,079 10 — 2,089 Asset-backed securities 497,045 9,442 (156 ) 506,331 Corporate debt securities 144,441 1,876 (9 ) 146,308 Total investment securities available for sale $ 6,754,781 $ 141,953 $ (4,572 ) $ 6,892,162 December 31, 2018 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 123,436 $ — $ (1,359 ) $ 122,077 U.S. Government agency securities 38,021 361 — 38,382 Mortgage-backed securities issued by U.S. Government agencies 100,060 172 (3,027 ) 97,205 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,460,498 1,981 (63,829 ) 2,398,650 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 1,215,406 2,997 (29,885 ) 1,188,518 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises 131,492 613 (2,240 ) 129,865 Corporate debt securities 17,000 150 (215 ) 16,935 Total investment securities available for sale $ 4,085,913 $ 6,274 $ (100,555 ) $ 3,991,632 At September 30, 2019 and December 31, 2018 , investment securities with a carrying value of $1.46 billion and $1.56 billion , respectively, were pledged to secure certain deposits and securities sold under repurchase agreements as required by law and contractual agreements. Synovus has evaluated investment securities that are in an unrealized loss position as of September 30, 2019 and December 31, 2018 for OTTI and does not consider any securities in an unrealized loss position to be other-than-temporarily impaired. If Synovus intended to sell a security in an unrealized loss position, the entire unrealized loss would be reflected in earnings. Synovus does not intend to sell investment securities in an unrealized loss position prior to the recovery of the unrealized loss, which may not be until maturity, and has the ability and intent to hold those securities for that period of time. Additionally, Synovus is not currently aware of any circumstances which will require it to sell any of the securities that are in an unrealized loss position prior to the respective securities' recovery of all such unrealized losses. For investment securities that Synovus does not expect to sell, or it is not more likely than not it will be required to sell prior to recovery of its amortized cost basis, the credit component of an OTTI would be recognized in earnings and the non-credit component would be recognized in OCI. Currently, unrealized losses on debt securities are attributable to increases in interest rates on comparable securities from the date of purchase. Synovus regularly evaluates its investment securities portfolio to ensure that there are no conditions that would indicate that unrealized losses represent OTTI. These factors include the length of time the security has been in a loss position, the extent that the fair value is below amortized cost, and the credit standing of the issuer. As of September 30, 2019 , Synovus had 27 investment securities in a loss position for less than twelve months and 8 investment securities in a loss position for twelve months or longer. At December 31, 2018, Synovus had 9 investment securities in a loss position for less than twelve months and 123 investment securities in a loss position for twelve months or longer. Asset-backed securities and corporate bonds and other debt securities acquired as part of the FCB acquisition were generally underwritten in accordance with Synovus' credit extension standards, without relying on a bond issuer's guarantee in making the investment decision. These investments are investment grade and will continue to be monitored as part of Synovus' ongoing impairment analysis, but are expected to perform in accordance with their terms. Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2019 and December 31, 2018 are presented below. September 30, 2019 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Government agency securities $ 1,046 $ (8 ) $ — $ — $ 1,046 $ (8 ) Mortgage-backed securities issued by U.S. Government agencies 3,381 (4 ) 11,333 (186 ) 14,714 (190 ) Mortgage-backed securities issued by U.S. Government sponsored enterprises 869,064 (2,271 ) 188,440 (1,937 ) 1,057,504 (4,208 ) Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 527 (1 ) — — 527 (1 ) Asset-backed securities 64,235 (156 ) — — 64,235 (156 ) Corporate debt securities 1,991 (9 ) — — 1,991 (9 ) Total $ 940,244 $ (2,449 ) $ 199,773 $ (2,123 ) $ 1,140,017 $ (4,572 ) December 31, 2018 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Treasury securities $ 39,031 $ (118 ) $ 63,570 $ (1,241 ) $ 102,601 $ (1,359 ) Mortgage-backed securities issued by U.S. Government agencies 2,059 (2 ) 79,736 (3,025 ) 81,795 (3,027 ) Mortgage-backed securities issued by U.S. Government sponsored enterprises 130,432 (700 ) 2,105,358 (63,129 ) 2,235,790 (63,829 ) Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 964,732 (29,885 ) 964,732 (29,885 ) Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises 58,998 (1,298 ) 44,220 (942 ) 103,218 (2,240 ) Corporate debt securities — — 1,785 (215 ) 1,785 (215 ) Total $ 230,520 $ (2,118 ) $ 3,259,401 $ (98,437 ) $ 3,489,921 $ (100,555 ) The amortized cost and fair value by contractual maturity of investment securities available for sale at September 30, 2019 are shown below. The expected life of mortgage-backed securities or CMOs may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. For purposes of the maturity table, mortgage-backed securities and CMOs, which are not due at a single maturity date, have been classified based on the final contractual maturity date. Distribution of Maturities at September 30, 2019 (in thousands) Within One 1 to 5 5 to 10 More Than Total Amortized Cost U.S. Treasury securities $ 19,782 $ — $ — $ — $ 19,782 U.S. Government agency securities 585 4,926 29,986 — 35,497 Mortgage-backed securities issued by U.S. Government agencies — 821 2,037 66,283 69,141 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 5,807 132,548 4,832,065 4,970,420 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 345 655,966 656,311 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 22,632 250,321 87,112 360,065 State and municipal securities — — 1,066 1,013 2,079 Asset-backed securities — — 377,474 119,571 497,045 Corporate debt securities 24,280 84,864 33,297 2,000 144,441 Total amortized cost $ 44,647 $ 119,050 $ 827,074 $ 5,764,010 $ 6,754,781 Fair Value U.S. Treasury securities $ 19,782 $ — $ — $ — $ 19,782 U.S. Government agency securities 592 4,954 31,331 — 36,877 Mortgage-backed securities issued by U.S. Government agencies — 825 2,077 66,779 69,681 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 5,811 135,778 4,923,912 5,065,501 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 353 665,569 665,922 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 23,152 264,048 92,471 379,671 State and municipal securities — — 1,069 1,020 2,089 Asset-backed securities — — 385,587 120,744 506,331 Corporate debt securities 24,421 85,851 34,045 1,991 146,308 Total fair value $ 44,795 $ 120,593 $ 854,288 $ 5,872,486 $ 6,892,162 Proceeds from sales, gross gains, and gross losses on sales of securities available for sale for the three and nine months ended September 30, 2019 and 2018 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 September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Proceeds from sales of investment securities available for sale $ 709,464 $ — $ 2,002,137 $ 35,066 Gross realized gains on sales 140 — 9,270 — Gross realized losses on sales (3,871 ) — (14,772 ) (1,296 ) Investment securities losses, net $ (3,731 ) $ — $ (5,502 ) $ (1,296 )

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Loans and Allowance for Loan Losses [Abstract]
Loans and Allowance for Loan Losses	Note 4 - Loans and Allowance for Loan Losses The following tables provide a summary of current, accruing past due, and non-accrual loans separately reported by originated (loans originated, renewed, refinanced, modified, or otherwise underwritten by Synovus) and acquired loans from business combinations by portfolio class as of September 30, 2019 and December 31, 2018 . See "Part I - Item 1. Financial Statements and Supplementary Data - Note 1 - Basis of Presentation" in this Report for more information on Synovus' accounting for purchased loans. Current, Accruing Past Due, and Non-accrual Originated Loans September 30, 2019 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 8,003,162 $ 15,997 $ 989 $ 16,986 $ 64,912 $ 8,085,060 Owner-occupied 5,572,063 6,068 1,617 7,685 9,222 5,588,970 Total commercial and industrial 13,575,225 22,065 2,606 24,671 74,134 13,674,030 Investment properties 6,055,365 1,714 902 2,616 378 6,058,359 1-4 family properties 634,144 2,928 834 3,762 2,218 640,124 Land and development 401,491 3,311 — 3,311 3,032 407,834 Total commercial real estate 7,091,000 7,953 1,736 9,689 5,628 7,106,317 Consumer mortgages 3,382,636 6,069 — 6,069 10,015 3,398,720 Home equity lines 1,596,081 7,354 38 7,392 12,590 1,616,063 Credit cards 262,724 2,657 2,493 5,150 — 267,874 Other consumer loans 2,261,276 18,527 780 19,307 4,736 2,285,319 Total consumer 7,502,717 34,607 3,311 37,918 27,341 7,567,976 Total loans $ 28,168,942 $ 64,625 $ 7,653 $ 72,278 $ 107,103 $ 28,348,323 (1) Current, Accruing Past Due, and Non-accrual Acquired Loans September 30, 2019 (in thousands) Current Accruing 30-89 Days Past Due (2) Accruing 90 Days or Greater Past Due (2) Total Accruing Past Due (2) Non-accrual (2) ASC 310-30 Loans Discount/Premium Total Commercial, financial and agricultural $ 658,014 $ 648 $ — $ 648 $ 5,000 $ 1,120,805 $ (13,646 ) $ 1,770,821 Owner-occupied 91,651 — — — — 913,716 (4,946 ) 1,000,421 Total commercial and industrial 749,665 648 — 648 5,000 2,034,521 (18,592 ) 2,771,242 Investment properties 917,663 — — — — 1,973,932 (15,191 ) 2,876,404 1-4 family properties 55,674 — — — — 43,208 (242 ) 98,640 Land and development 114,642 — — — — 92,829 (2,799 ) 204,672 Total commercial real estate 1,087,979 — — — — 2,109,969 (18,232 ) 3,179,716 Consumer mortgages 97,107 — — — — 2,045,872 (70,969 ) 2,072,010 Home equity lines 60,565 201 — 201 — 2,377 (4,114 ) 59,029 Other consumer loans 311 — — — — 10,790 (934 ) 10,167 Total consumer 157,983 201 — 201 — 2,059,039 (76,017 ) 2,141,206 Total loans $ 1,995,627 $ 849 $ — $ 849 $ 5,000 $ 6,203,529 $ (112,841 ) $ 8,092,164 (3) Current, Accruing Past Due, and Non-accrual Loans December 31, 2018 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 7,372,301 $ 7,988 $ 114 $ 8,102 $ 69,295 $ 7,449,698 Owner-occupied 5,317,023 5,433 81 5,514 8,971 5,331,508 Total commercial and industrial 12,689,324 13,421 195 13,616 78,266 12,781,206 Investment properties 5,557,224 1,312 34 1,346 2,381 5,560,951 1-4 family properties 674,648 2,745 96 2,841 2,381 679,870 Land and development 319,978 739 — 739 2,953 323,670 Total commercial real estate 6,551,850 4,796 130 4,926 7,715 6,564,491 Consumer mortgages 2,922,136 7,150 — 7,150 4,949 2,934,235 Home equity lines 1,496,562 7,092 28 7,120 12,114 1,515,796 Credit cards 252,832 3,066 2,347 5,413 — 258,245 Other consumer loans 1,894,352 17,604 1,098 18,702 3,689 1,916,743 Total consumer 6,565,882 34,912 3,473 38,385 20,752 6,625,019 Total loans $ 25,807,056 $ 53,129 $ 3,798 $ 56,927 $ 106,733 $ 25,970,716 (4) (1) Total before net deferred fees and costs of $22.7 million . (2) For purposes of this table, non-performing and past due loans exclude acquired loans accounted for under ASC 310-30. (3) Represents $9.29 billion (at fair value) of loans acquired from FCB, net of paydowns and payoffs including maturities since Acquisition Date. (4) Total before net deferred fees and costs of $24.1 million . Loans with carrying values of $11.77 billion and $8.40 billion were pledged as collateral for borrowings and capacity at September 30, 2019 and December 31, 2018 , respectively, to the FHLB and Federal Reserve Bank. The credit quality of the loan portfolio is reviewed and updated no less frequently than quarterly using the standard asset classification system utilized by the federal banking agencies. These classifications are divided into three groups – Not Criticized (Pass), Special Mention, and Classified or Adverse rating (Substandard, Doubtful, and Loss) and are defined as follows: Pass - loans which are well protected by the current net worth and paying capacity of the obligor (or guarantors, if any) or by the fair value, less cost to acquire and sell in a timely manner, of any underlying collateral. Special Mention - loans which have potential weaknesses that deserve management's close attention. These loans are not adversely classified and do not expose an institution to sufficient risk to warrant an adverse classification. Substandard - loans which are inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. Loans with this classification are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Doubtful - loans which have all the weaknesses inherent in loans classified as Substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently known facts, conditions, and values. Loss - loans which are considered by management to be uncollectible and of such little value that their continuance on the institution's books as an asset, without establishment of a specific valuation allowance or charge-off, is not warranted. Synovus fully reserves for any loans rated as Loss. In the following tables, consumer loans are generally assigned a risk grade similar to the classifications described above; however, upon reaching 90 days and 120 days past due, they are generally downgraded to Substandard and Loss, respectively, in accordance with the FFIEC Retail Credit Classification Policy. Additionally, in accordance with Interagency Supervisory Guidance, the risk grade classifications of consumer loans (consumer mortgages and HELOCs) secured by junior liens on 1-4 family residential properties also consider available information on the payment status of any associated senior liens with other financial institutions. Originated Loan Portfolio Credit Exposure by Risk Grade September 30, 2019 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss (3) Total Commercial, financial and agricultural $ 7,816,114 $ 104,214 $ 156,919 $ 7,813 $ — $ 8,085,060 Owner-occupied 5,493,248 19,647 76,002 73 — 5,588,970 Total commercial and industrial 13,309,362 123,861 232,921 7,886 — 13,674,030 Investment properties 6,007,116 20,549 30,694 — — 6,058,359 1-4 family properties 628,631 3,558 7,935 — — 640,124 Land and development 386,163 9,878 11,793 — — 407,834 Total commercial real estate 7,021,910 33,985 50,422 — — 7,106,317 Consumer mortgages 3,388,412 — 9,859 373 76 3,398,720 Home equity lines 1,600,061 — 14,683 21 1,298 1,616,063 Credit cards 265,382 — 822 — 1,670 (4) 267,874 Other consumer loans 2,280,305 — 5,014 — — 2,285,319 Total consumer 7,534,160 — 30,378 394 3,044 7,567,976 Total loans $ 27,865,432 $ 157,846 $ 313,721 $ 8,280 $ 3,044 $ 28,348,323 (5) Acquired Loan Portfolio Credit Exposure by Risk Grade September 30, 2019 (in thousands) Pass Special Mention Substandard (1) Doubtful Loss Total Commercial, financial and agricultural $ 1,701,326 $ 48,615 $ 20,880 $ — $ — $ 1,770,821 Owner-occupied 971,075 24,039 5,307 — — 1,000,421 Total commercial and industrial 2,672,401 72,654 26,187 — — 2,771,242 Investment properties 2,842,820 27,488 6,096 — — 2,876,404 1-4 family properties 98,316 — 324 — — 98,640 Land and development 197,957 6,588 127 — — 204,672 Total commercial real estate 3,139,093 34,076 6,547 — — 3,179,716 Consumer mortgages 2,064,108 — 7,902 — — 2,072,010 Home equity lines 58,983 — 46 — — 59,029 Other consumer loans 10,167 — — — — 10,167 Total consumer 2,133,258 — 7,948 — — 2,141,206 Total loans $ 7,944,752 $ 106,730 $ 40,682 $ — $ — $ 8,092,164 (6) Loan Portfolio Credit Exposure by Risk Grade December 31, 2018 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss (3) Total Commercial, financial and agricultural $ 7,190,517 $ 118,188 $ 140,218 $ 775 $ — $ 7,449,698 Owner-occupied 5,212,473 55,038 63,572 425 — 5,331,508 Total commercial and industrial 12,402,990 173,226 203,790 1,200 — 12,781,206 Investment properties 5,497,344 40,516 23,091 — — 5,560,951 1-4 family properties 663,692 6,424 9,754 — — 679,870 Land and development 297,855 12,786 13,029 — — 323,670 Total commercial real estate 6,458,891 59,726 45,874 — — 6,564,491 Consumer mortgages 2,926,712 — 7,425 98 — 2,934,235 Home equity lines 1,501,316 — 13,130 174 1,176 1,515,796 Credit cards 255,904 — 858 — 1,483 (4) 258,245 Other consumer loans 1,912,902 — 3,841 — — 1,916,743 Total consumer 6,596,834 — 25,254 272 2,659 6,625,019 Total loans $ 25,458,715 $ 232,952 $ 274,918 $ 1,472 $ 2,659 $ 25,970,716 (7) (1) Includes $249.8 million and $172.3 million of Substandard accruing loans at September 30, 2019 and December 31, 2018 , respectively. (2) The loans within this risk grade are on non-accrual status and generally have an ALL equal to 50% of the loan amount. (3) The loans within this risk grade are on non-accrual status and have an ALL 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 ALL equal to the full loan amount and are generally charged off upon reaching 181 days past due in accordance with the FFIEC Retail Credit Classification Policy. (5) Total before net deferred fees and costs of $22.7 million . (6) Represents $9.29 billion (at fair value) of loans acquired from FCB, net of paydowns and payoffs including maturities since Acquisition Date. (7) Total before net deferred fees and costs of $24.1 million . Acquired loans As discussed in "Part I - Item 1. Financial Statements and Supplementary Data - Note 2 - Acquisitions" , on January 1, 2019, Synovus acquired loans from FCB with fair values of $9.29 billion net of total discount of $164.2 million . At the Acquisition Date, the contractual required payments receivable on the purchased loans accounted for under ASC 310-20 totaled $2.45 billion , with a corresponding fair value of $2.15 billion . The estimated cash flows not expected to be collected at the Acquisition Date were $39.5 million . Information about the acquired FCB loan portfolio accounted for under ASC 310-30 as of the Acquisition Date is in the following table. (in thousands) ASC 310-30 Loans Contractually required principal and interest at acquisition $ 8,377,942 Non-accretable difference (expected losses and foregone interest) (163,147 ) Cash flows expected to be collected at acquisition 8,214,795 Accretable yield (1,066,689 ) Basis in ASC 310-30 loans at acquisition $ 7,148,106 The following table is a summary of changes in the accretable yield for all loans accounted for under ASC 310-30 for the nine months ended September 30, 2019 . (in thousands) Nine Months Ended September 30, 2019 Beginning balance $ — Additions 1,066,689 Transfers from non-accretable difference to accretable yield (1) 13,516 Accretion (273,231 ) Changes in expected cash flows not affecting non-accretable differences (2) 24,929 Ending balance $ 831,903 (1) Represents improvement in the credit component of expected cash flows. (2) Includes changes in cash flows expected to be collected due to the impact of changes in actual or expected timing of liquidation events, modifications, changes in interest rates and changes in prepayment assumptions. The following tables detail the changes in the ALL by loan segment for the three and nine months ended September 30, 2019 and 2018 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For the Three Months Ended September 30, 2019 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 138,004 $ 63,463 $ 55,909 $ 257,376 Charge-offs (15,425 ) (3,275 ) (6,026 ) (24,726 ) Recoveries 2,276 1,490 1,035 4,801 Provision for (reversal of) loan losses 17,156 280 10,126 27,562 Ending balance (1) $ 142,011 $ 61,958 $ 61,044 $ 265,013 Ending balance: individually evaluated for impairment $ 14,139 $ 1,184 $ 881 $ 16,204 Ending balance: collectively evaluated for impairment $ 127,872 $ 60,774 $ 60,163 $ 248,809 Loans: Ending balance: total loans (2) $ 16,445,272 $ 10,286,033 $ 9,709,182 $ 36,440,487 Ending balance: individually evaluated for impairment $ 139,160 $ 28,797 $ 31,459 $ 199,416 Ending balance: collectively evaluated for impairment (3) $ 14,292,323 $ 8,163,218 $ 7,687,835 $ 30,143,376 Ending balance: acquired loans accounted for under ASC 310-30 (4) $ 2,013,789 $ 2,094,018 $ 1,989,888 $ 6,097,695 As Of and For the Three Months Ended September 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 130,335 $ 75,205 $ 46,185 $ 251,725 Charge-offs (13,526 ) (1,077 ) (3,993 ) (18,596 ) Recoveries 1,091 591 1,657 3,339 Provision for loan losses 11,417 (1,447 ) 5,012 14,982 Ending balance $ 129,317 $ 73,272 $ 48,861 $ 251,450 Ending balance: individually evaluated for impairment $ 9,108 $ 3,317 $ 970 $ 13,395 Ending balance: collectively evaluated for impairment $ 120,209 $ 69,955 $ 47,891 $ 238,055 Loans: Ending balance: total loans (5)(6) $ 12,503,294 $ 6,712,406 $ 6,385,197 $ 25,600,897 Ending balance: individually evaluated for impairment $ 102,671 $ 37,988 $ 28,963 $ 169,622 Ending balance: collectively evaluated for impairment $ 12,400,623 $ 6,674,418 $ 6,356,234 $ 25,431,275 (1) As of and for the three months ended September 30, 2019 , there was no ALL for acquired loans accounted for under ASC 310-30. (2) Total before net deferred fees and costs of $22.7 million . (3) These loans are presented net of the remaining fair value discount of $7.0 million at September 30, 2019 . (4) These loans are presented net of the remaining fair value discount of $105.8 million at September 30, 2019 . (5) Total before net deferred fees and costs of $23.8 million . (6) As of and for the three months ended September 30, 2018 , there were no PCI loans and no ALL for PCI loans. Allowance for Loan Losses and Recorded Investment in Loans As Of and For the Nine Months Ended September 30, 2019 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 133,123 $ 68,796 $ 48,636 $ 250,555 Charge-offs (39,558 ) (5,369 ) (17,363 ) (62,290 ) Recoveries 6,087 3,788 3,623 13,498 Provision for (reversal of) loan losses 42,359 (5,257 ) 26,148 63,250 Ending balance (1) $ 142,011 $ 61,958 $ 61,044 $ 265,013 Ending balance: individually evaluated for impairment $ 14,139 $ 1,184 $ 881 $ 16,204 Ending balance: collectively evaluated for impairment $ 127,872 $ 60,774 $ 60,163 $ 248,809 Loans: Ending balance: total loans (2) $ 16,445,272 $ 10,286,033 $ 9,709,182 $ 36,440,487 Ending balance: individually evaluated for impairment $ 139,160 $ 28,797 $ 31,459 $ 199,416 Ending balance: collectively evaluated for impairment (3) $ 14,292,323 $ 8,163,218 $ 7,687,835 $ 30,143,376 Ending balance: acquired loans accounted for under ASC 310-30 (4) $ 2,013,789 $ 2,094,018 $ 1,989,888 $ 6,097,695 As Of and For the Nine Months Ended September 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 126,803 $ 74,998 $ 47,467 $ 249,268 Charge-offs (37,312 ) (3,523 ) (13,888 ) (54,723 ) Recoveries 5,086 7,555 4,716 17,357 Provision for (reversal of) loan losses 34,740 (5,758 ) 10,566 39,548 Ending balance $ 129,317 $ 73,272 $ 48,861 $ 251,450 Ending balance: individually evaluated for impairment $ 9,108 $ 3,317 $ 970 $ 13,395 Ending balance: collectively evaluated for impairment $ 120,209 $ 69,955 $ 47,891 $ 238,055 Loans: Ending balance: total loans (5)(6) $ 12,503,294 $ 6,712,406 $ 6,385,197 $ 25,600,897 Ending balance: individually evaluated for impairment $ 102,671 $ 37,988 $ 28,963 $ 169,622 Ending balance: collectively evaluated for impairment $ 12,400,623 $ 6,674,418 $ 6,356,234 $ 25,431,275 (1) As of and for the nine months ended September 30, 2019 , there was no ALL for acquired loans accounted for under ASC 310-30. (2) Total before net deferred fees and costs of $22.7 million . (3) These loans are presented net of the remaining fair value discount of $7.0 million at September 30, 2019 . (4) These loans are presented net of the remaining fair value discount of $105.8 million at September 30, 2019 . (5) Total before net deferred fees and costs of $23.8 million . (6) As of and for the nine months ended September 30, 2018 , there were no PCI loans and no ALL for PCI loans. Below is a detailed summary of impaired loans (including TDRs) by class as of September 30, 2019 and December 31, 2018 and for the three and nine months ended September 30, 2019 and 2018 . At September 30, 2019 and December 31, 2018 , impaired loans of $69.4 million and $51.3 million , respectively, were on non-accrual status. Impaired Loans (including accruing TDRs) September 30, 2019 December 31, 2018 Recorded Investment Recorded Investment (in thousands) Unpaid Principal Balance Without an ALL With an ALL Related Allowance Unpaid Principal Balance Without an ALL With an ALL Related Allowance Commercial, financial and agricultural $ 104,229 $ 33,534 $ 55,413 $ 11,267 $ 65,150 $ 22,298 $ 34,222 $ 7,133 Owner-occupied 50,493 — 50,213 2,872 49,588 — 48,902 3,074 Total commercial and industrial 154,722 33,534 105,626 14,139 114,738 22,298 83,124 10,207 Investment properties 12,307 — 12,307 555 13,916 — 13,916 1,523 1-4 family properties 5,064 — 5,005 117 5,586 — 5,586 131 Land and development 12,752 1,055 10,430 512 16,283 265 13,431 944 Total commercial real estate 30,123 1,055 27,742 1,184 35,785 265 32,933 2,598 Consumer mortgages 18,881 874 17,707 372 19,506 — 19,506 343 Home equity lines 6,360 — 6,282 278 3,264 — 3,235 224 Other consumer loans 6,596 — 6,596 231 5,565 — 5,565 177 Total consumer 31,837 874 30,585 881 28,335 — 28,306 744 Total loans $ 216,682 $ 35,463 $ 163,953 $ 16,204 $ 178,858 $ 22,563 $ 144,363 $ 13,549 Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 (in thousands) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Commercial, financial and agricultural $ 85,487 $ 620 $ 61,254 $ 379 Owner-occupied 50,929 504 44,366 574 Total commercial and industrial 136,416 1,124 105,620 953 Investment properties 12,518 156 14,103 179 1-4 family properties 5,277 125 9,697 176 Land and development 11,375 32 16,822 62 Total commercial real estate 29,170 313 40,622 417 Consumer mortgages 19,278 206 19,966 226 Home equity lines 5,705 47 3,433 34 Other consumer loans 6,221 99 5,284 69 Total consumer 31,204 352 28,683 329 Total loans $ 196,790 $ 1,789 $ 174,925 $ 1,699 (1) Of the interest income recognized during the three months ended September 30, 2019 and 2018 , cash-basis interest income was $310 thousand and $391 thousand , respectively. Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 (in thousands) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Commercial, financial and agricultural $ 82,745 $ 1,558 $ 69,546 $ 1,230 Owner-occupied 50,839 1,644 40,171 1,388 Total commercial and industrial 133,584 3,202 109,717 2,618 Investment properties 12,829 453 20,437 597 1-4 family properties 5,294 391 10,876 619 Land and development 11,166 101 17,807 212 Total commercial real estate 29,289 945 49,120 1,428 Consumer mortgages 19,627 635 20,397 621 Home equity lines 4,619 119 4,642 136 Other consumer loans 5,874 259 5,220 212 Total consumer 30,120 1,013 30,259 969 Total loans $ 192,993 $ 5,160 $ 189,096 $ 5,015 (1) Of the interest income recognized during the nine months ended September 30, 2019 and 2018 , cash-basis interest income was $1.0 million and $926 thousand , respectively. Information about Synovus' TDRs is presented in the following tables. Modifications of loans that are accounted for within a pool under ASC Topic 310-30 are excluded as TDRs. Accordingly, such modifications do not result in the removal of those loans from the pool, even if the modification of those loans would otherwise be considered a TDR. As a result, all such acquired loans that would otherwise meet the criteria for classification as a TDR are excluded from the tables below. The following tables represent, by concession type, the post-modification balance for loans modified or renewed during the three and nine months ended September 30, 2019 and 2018 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Three Months Ended September 30, 2019 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 27 $ 2,577 $ 1,917 $ 4,494 Owner-occupied 7 2,822 861 3,683 Total commercial and industrial 34 5,399 2,778 8,177 Investment properties 4 385 — 385 1-4 family properties 4 766 — 766 Land and development 1 473 — 473 Total commercial real estate 9 1,624 — 1,624 Consumer mortgages 10 1,008 118 1,126 Home equity lines 25 364 1,635 1,999 Other consumer loans 27 473 1,222 1,695 Total consumer 62 1,845 2,975 4,820 Total TDRs 105 $ 8,868 $ 5,753 $ 14,621 (2) Three Months Ended September 30, 2018 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 7 $ — $ 565 $ 565 Owner-occupied 3 727 4,839 5,566 Total commercial and industrial 10 727 5,404 6,131 Investment properties 1 42 — 42 1-4 family properties 5 445 766 1,211 Land and development 1 — 71 71 Total commercial real estate 7 487 837 1,324 Consumer mortgages 2 670 — 670 Home equity lines 1 — 191 191 Other consumer loans 44 695 2,784 3,479 Total consumer 47 1,365 2,975 4,340 Total TDRs 64 $ 2,579 $ 9,216 $ 11,795 (3) (1) Other concessions generally include term extensions, interest only payments for a period of time, or principal forgiveness, but there was no principal forgiveness for each of the three months ended September 30, 2019 and 2018 . (2) No net charge-offs were recorded during the three months ended September 30, 2019 upon restructuring of these loans . (3) Net charge-offs of $88 thousand were recorded during the three months ended September 30, 2018 upon restructuring of these loans. TDRs by Concession Type Nine Months Ended September 30, 2019 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 61 $ 5,703 $ 4,404 $ 10,107 Owner-occupied 13 4,854 861 5,715 Total commercial and industrial 74 10,557 5,265 15,822 Investment properties 6 1,048 — 1,048 1-4 family properties 14 2,072 — 2,072 Land and development 3 641 — 641 Total commercial real estate 23 3,761 — 3,761 Consumer mortgages 15 1,245 1,332 2,577 Home equity lines 50 2,686 1,740 4,426 Other consumer loans 79 1,167 3,599 4,766 Total consumer 144 5,098 6,671 11,769 Total TDRs 241 $ 19,416 $ 11,936 $ 31,352 (2 ) Nine Months Ended September 30, 2018 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 21 $ — $ 2,130 $ 2,130 Owner-occupied 9 5,526 5,523 11,049 Total commercial and industrial 30 5,526 7,653 13,179 Investment properties 4 6,053 2,215 8,268 1-4 family properties 12 1,408 1,259 2,667 Land and development 4 — 1,856 1,856 Total commercial real estate 20 7,461 5,330 12,791 Consumer mortgages 16 5,365 87 5,452 Home equity lines 4 172 339 511 Other consumer loans 75 1,621 3,606 5,227 Total consumer 95 7,158 4,032 11,190 Total TDRs 145 $ 20,145 $ 17,015 $ 37,160 (3) (1) Other concessions generally include term extensions, interest only payments for a period of time, or principal forgiveness, but there was no principal forgiveness for each of the nine months ended September 30, 2019 and 2018 . (2) No net charge-offs were recorded during the nine months ended September 30, 2019 upon restructuring of these loans. (3) Net charge-offs of $88 thousand were recorded during the nine months ended September 30, 2018 upon restructuring of these loans. For the three and nine months ended September 30, 2019 there were three defaults with a recorded investment of $321 thousand and four defaults with a recorded investment of $326 thousand , respectively, on accruing TDRs restructured during the previous twelve months (defaults are defined as the earlier of the TDR being placed on non-accrual status or reaching 90 days past due with respect to principal and/or interest payments). There were no defaults for the three months ended September 30, 2018 and eight defaults with a recorded investment of $10.5 million for the nine months ended September 30, 2018. If, at the time a loan was designated as a TDR, the loan was not already impaired, the measurement of impairment that resulted from the TDR designation closely approximates the reserve derived through specific loan measurement of impairment in accordance with ASC 310-10-35. Generally, the change in the ALL resulting from such TDR designation is not significant. At September 30, 2019 , the ALL allocated to accruing TDRs totaling $130.0 million was $5.8 million compared to accruing TDRs of $115.6 million with an allocated ALL of $6.1 million at December 31, 2018 . 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. As of September 30, 2019 and December 31, 2018 , there were no commitments to lend a material amount of additional funds to any customer whose loan was classified as a TDR.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 5 - Goodwill and Other Intangible Assets Changes to the carrying amount of goodwill by reporting unit for the nine months ended September 30, 2019 are provided in the following table. There were no changes to the carrying amount of goodwill during the year ended December 31, 2018 . (in thousands) Synovus Bank Reporting Unit Trust Services Reporting Unit Total Balance as of December 31, 2018 $ 32,884 $ 24,431 $ 57,315 Goodwill acquired during the year (preliminary allocation) and adjustments 430,550 — 430,550 Balance as of September 30, 2019 $ 463,434 $ 24,431 $ 487,865 Effective January 1, 2019, Synovus acquired FCB. In connection with the acquisition, Synovus recorded $430.6 million of goodwill based on Acquisition Date preliminary fair value estimates of the assets acquired and liabilities assumed in the business combination, including measurement period adjustments. Additionally, Synovus recorded a $57.4 million core deposit intangible asset on the Acquisition Date, including a measurement period adjustment. See "Part I - Item 1. Financial Statements and Supplementary Data - Note 2 - Acquisitions" in this Report for additional information on the FCB acquisition. As of June 30, 2019, Synovus completed its annual goodwill impairment evaluation applying ASC 350-20-35-3A, Goodwill Subsequent Measurement - Qualitative Assessment Approach based on the preliminary allocation of goodwill to the reporting units shown above and concluded that goodwill was not impaired. No events or circumstances have occurred since that date to warrant a subsequent interim evaluation. The following table shows the gross carrying amount and accumulated amortization of other intangible assets as of September 30, 2019 and December 31, 2018 , which primarily consist of core deposit intangible assets acquired in the FCB acquisition. Core deposit intangible assets were $49.6 million at September 30, 2019 . The CDI is being amortized over its estimated useful life of approximately ten years utilizing an accelerated method. Amortization expense recognized on intangible assets for the three and nine months ended September 30, 2019 , was $2.9 million and $8.7 million , respectively. Amortization expense recognized on intangible assets for the three and nine months ended September 30, 2018 was $292 thousand and $875 thousand , respectively. (in thousands) September 30, 2019 December 31, 2018 Other intangible assets, gross carrying amount $ 70,328 $ 12,928 Other intangible assets, accumulated amortization (11,756 ) (3,053 ) Other intangible assets, net carrying amount $ 58,572 $ 9,875

Shareholders' Equity and Other

Shareholders' Equity and Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Shareholders' Equity and Other Comprehensive Income (Loss)	Note 6 - Shareholders' Equity and Other Comprehensive Income (Loss) Stock issued for acquisition of FCB On January 1, 2019, as part of the FCB acquisition, Synovus issued 22.0 million shares of common stock and reissued 27.4 million shares of treasury stock and incurred $417 thousand in costs related to the issuance. FCB stockholders received 1.055 shares of Synovus common stock for each outstanding share of FCB common stock. Also, under the terms of the Merger Agreement, outstanding stock options, non-vested restricted share units, and warrants were converted into options, restricted share units, and warrants, respectively, to purchase and receive Synovus common stock. The total value of the acquisition consideration transferred by Synovus was $1.63 billion . See "Part I - Item 1. Financial Statements and Supplementary Data - Note 2 - Acquisitions" in this Report for more information on the FCB acquisition. Repurchases of Common Stock On June 17, 2019, Synovus announced that the Board of Directors increased its prior $400 million share repurchase authorization to $725 million for the year 2019. As of September 30, 2019 , Synovus had repurchased under this program a total of $688.5 million , or 18.8 million shares of its common stock, at an average price of $36.55 per share. Issuance of Series E Preferred Stock On July 1, 2019, Synovus completed a $350 million public offering of Series E Preferred Stock. The offering generated net proceeds of $341.4 million . Dividends on the shares are non-cumulative and, if declared, will accrue and be payable, in arrears, quarterly at a rate per annum equal to 5.875% for each dividend period from the original issue date to, but excluding, July 1, 2024. From and including July 1, 2024, the dividend rate will change and reset every five years on July 1 at a rate equal to the five-year U.S. Treasury Rate plus 4.127% per annum. The Series E Preferred Stock is redeemable at Synovus' option in whole or in part, from time to time, on July 1, 2024 or any subsequent reset date, or in whole but not in part, at any time within 90 days following a regulatory capital treatment event, in each case at a redemption price equal to $25.00 per share, plus any declared and unpaid dividends, without accumulation of any undeclared dividends. The Series E Preferred Stock has no preemptive or conversion rights. Except in limited circumstances, the Series E Preferred Stock does not have any voting rights. Series D Preferred Stock Synovus' outstanding $200 million Series D Preferred Stock, $25.00 per share liquidation preference, is reflected net of issuance costs at $195.1 million . Dividends on the shares are non-cumulative and, if declared, will accrue and be payable, in arrears, quarterly at a rate per annum equal to 6.300% for each dividend period from the original issue date to, but excluding, June 21, 2023. From and including June 21, 2023, the dividend rate will change to a floating rate equal to the three-month LIBOR plus a spread of 3.352% per annum. The Series D Preferred Stock is redeemable at Synovus' option in whole or in part, from time to time, on any dividend payment date on or after June 21, 2023, or in whole, but not in part, at any time within 90 days following a regulatory capital treatment event at a redemption price equal to $25.00 per share, plus any declared and unpaid dividends, without accumulation of any undeclared dividends. The Series D Preferred Stock has no preemptive or conversion rights. Except in limited circumstances, the Series D Preferred Stock does not have any voting rights. 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 and nine months ended September 30, 2019 and 2018 . Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) (in thousands) Net unrealized gains (losses) on investment securities available for sale (1) Net unrealized gains (losses) on cash flow hedges (1) Post-retirement unfunded health benefit Total Balance, July 1, 2019 $ 60,586 $ (12,137 ) $ 840 $ 49,289 Other comprehensive income (loss) before reclassifications 25,133 (876 ) (378 ) 23,879 Amounts reclassified from AOCI 2,765 — — 2,765 Net current period other comprehensive income (loss) 27,898 (876 ) (378 ) 26,644 Balance, September 30, 2019 $ 88,484 $ (13,013 ) $ 462 $ 75,933 Balance, July 1, 2018 $ (114,565 ) $ (12,137 ) $ 982 $ (125,720 ) Other comprehensive income (loss) before reclassifications (17,940 ) — (34 ) (17,974 ) Amounts reclassified from AOCI — — (26 ) (26 ) Net current period other comprehensive income (loss) (17,940 ) — (60 ) (18,000 ) Balance, September 30, 2018 $ (132,505 ) $ (12,137 ) $ 922 $ (143,720 ) Balance, January 1, 2019 $ (83,179 ) $ (12,137 ) $ 896 $ (94,420 ) Other comprehensive income (loss) before reclassifications 167,586 (876 ) (378 ) 166,332 Amounts reclassified from AOCI 4,077 — (56 ) 4,021 Net current period other comprehensive income (loss) 171,663 (876 ) (434 ) 170,353 Balance, September 30, 2019 $ 88,484 $ (13,013 ) $ 462 $ 75,933 Balance, December 31, 2017 $ (43,470 ) $ (12,137 ) $ 853 $ (54,754 ) Reclassification from adoption of ASU 2018-02 (7,763 ) — 175 (7,588 ) Cumulative-effect adjustment from adoption of ASU 2016-01 117 — — 117 Other comprehensive income (loss) before reclassifications (82,349 ) — (34 ) (82,383 ) Amounts reclassified from AOCI 960 — (72 ) 888 Net current period other comprehensive income (loss) (81,389 ) — (106 ) (81,495 ) Balance, September 30, 2018 $ (132,505 ) $ (12,137 ) $ 922 $ (143,720 ) (1) In accordance with ASC 740-20-45-11(b), in 2010 and 2011, Synovus recorded a deferred tax asset valuation allowance associated with net unrealized losses not recognized in income directly to other comprehensive income (loss) by applying the portfolio approach which treats derivative instruments and available for sale securities as a single portfolio. For all periods presented, the ending balance in net unrealized gains (losses) on cash flow hedges and investment securities available for sale includes unrealized losses of $12.1 million and $13.3 million , respectively, related to the residual tax effects remaining in OCI due to the previously established deferred tax asset valuation allowance. Under the portfolio approach, these unrealized losses are realized at the time the entire portfolio is sold or disposed.

Fair Value Accounting

Fair Value Accounting	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Accounting	Note 7 - Fair Value Accounting See "Part II - Item 8. Financial Statements and Supplementary Data - Note 1 - Summary of Significant Accounting Policies" to the consolidated financial statements of Synovus' 2018 Form 10-K for a description of the fair value hierarchy and 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 tables present all financial instruments measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 . September 30, 2019 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities $ — $ 30 $ — $ 30 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 1,686 — 1,686 Other mortgage-backed securities 1,799 1,799 State and municipal securities — 485 — 485 Total trading securities $ — $ 4,000 $ — $ 4,000 Investment securities available for sale: U.S. Treasury securities $ 19,782 $ — $ — $ 19,782 U.S. Government agency securities — 36,877 — 36,877 Mortgage-backed securities issued by U.S. Government agencies — 69,681 — 69,681 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 5,065,501 — 5,065,501 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 665,922 — 665,922 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 379,671 — 379,671 State and municipal securities — 2,089 — 2,089 Asset-backed securities — 506,331 — 506,331 Corporate debt securities — 144,317 1,991 146,308 Total investment securities available for sale $ 19,782 $ 6,870,389 $ 1,991 $ 6,892,162 Mortgage loans held for sale — 129,415 — 129,415 Private equity investments — — 11,289 11,289 Mutual funds and mutual funds held in rabbi trusts 31,429 — — 31,429 GGL/SBA loans servicing asset — — 3,350 3,350 Derivative assets — 181,805 — 181,805 Liabilities Trading account liabilities — 1,593 — 1,593 Earnout liability (1) — — 24,810 24,810 Derivative liabilities — 41,350 3,335 44,685 December 31, 2018 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities $ — $ 44 $ — $ 44 State and municipal securities — 1,064 — 1,064 Other investments 1,128 894 — 2,022 Total trading securities $ 1,128 $ 2,002 $ — $ 3,130 Investment securities available for sale: U.S. Treasury securities $ 122,077 $ — $ — $ 122,077 U.S. Government agency securities — 38,382 — 38,382 Mortgage-backed securities issued by U.S. Government agencies — 97,205 — 97,205 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,398,650 — 2,398,650 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 1,188,518 — 1,188,518 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 129,865 — 129,865 Corporate debt securities — 15,150 1,785 16,935 Total investment securities available for sale $ 122,077 $ 3,867,770 $ 1,785 $ 3,991,632 Mortgage loans held for sale — 37,129 — 37,129 Private equity investments — — 11,028 11,028 Mutual funds and mutual funds held in rabbi trusts 16,012 — — 16,012 GGL/SBA loans servicing asset — — 3,729 3,729 Derivative assets — 19,332 — 19,332 Liabilities Earnout liability (1) — — 14,353 14,353 Derivative liabilities — 16,535 1,673 18,208 (1) Earnout liability consists of contingent consideration obligation related to the Global One acquisition. Fair Value Option Synovus has elected the fair value option for mortgage loans held for sale primarily to ease the operational burden required to maintain hedge accounting for these loans. Synovus is still able to achieve effective economic hedges on mortgage loans held for sale without the time and expense needed to manage a hedge accounting program. The following table summarizes the difference between the fair value and the UPB of mortgage loans held for sale measured at fair value and the changes in fair value of these loans. An immaterial portion of these changes in fair value was attributable to changes in instrument-specific credit risk. Mortgage Loans Held for Sale (in thousands) As of September 30, 2019 As of December 31, 2018 Fair value $ 129,415 $ 37,129 Unpaid principal balance 126,541 35,848 Fair value less aggregate unpaid principal balance $ 2,874 $ 1,281 Changes in Fair Value Included in Net Income Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Mortgage loans held for sale $ 892 $ (569 ) $ 1,593 $ (414 ) Fair Value Measurements Using Significant Unobservable Inputs (Level 3) During the three and nine months ended September 30, 2019 and 2018 , Synovus did not have any transfers in or out of Level 3 in the fair value hierarchy. For the three and nine months ended September 30, 2019 , total net gains/(losses) included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2019 was a $12.2 million loss and a $9.9 million loss, respectively. For the three and nine months ended September 30, 2018 , total net gains/(losses) included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2018 was an $11.2 million loss and a $16.6 million loss , respectively. Three Months Ended September 30, 2019 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Loans Servicing Asset Earnout Visa Derivative Beginning balance, July 1, 2019 $ 2,017 $ 13,341 $ 3,326 $ (14,353 ) $ (1,049 ) Total gains (losses) realized/unrealized: Included in earnings — 1,194 (298 ) (10,457 ) (2,500 ) Unrealized gains (losses) included in OCI (26 ) — — — — Additions — — 322 — — Settlements — (3,246 ) — — 214 Ending balance, September 30, 2019 $ 1,991 $ 11,289 $ 3,350 $ (24,810 ) $ (3,335 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2019 $ — $ 777 $ — $ (10,457 ) $ (2,500 ) Three Months Ended September 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Earnout Visa Derivative Beginning balance, July 1, 2018 $ 1,857 $ 12,678 $ 4,186 $ (11,348 ) $ (5,943 ) Total gains (losses) realized/unrealized: Included in earnings — 434 (561 ) (11,652 ) — Unrealized gains (losses) included in OCI 108 — — — — Additions — — 136 — — Settlements — — — — 3,953 Ending balance, September 30, 2018 $ 1,965 $ 13,112 $ 3,761 $ (23,000 ) $ (1,990 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2018 $ — $ 434 $ — $ (11,652 ) $ — Nine Months Ended September 30, 2019 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Earnout Visa Derivative Beginning balance, January 1, 2019 $ 1,785 $ 11,028 $ 3,729 $ (14,353 ) $ (1,673 ) Total gains (losses) realized/unrealized: Included in earnings — 3,507 (1,091 ) (10,457 ) (2,500 ) Unrealized gains (losses) included in OCI 206 — — — — Additions — — 712 — — Settlements — (3,246 ) — — 838 Ending balance, September 30, 2019 $ 1,991 $ 11,289 $ 3,350 $ (24,810 ) $ (3,335 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2019 $ — $ 3,090 $ — $ (10,457 ) $ (2,500 ) Nine Months Ended September 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Earnout Visa Derivative Beginning balance, January 1, 2018 $ 1,935 $ 15,771 $ 4,101 $ (11,348 ) $ (4,330 ) Total (losses) gains realized/unrealized: Included in earnings — (2,659 ) (1,295 ) (11,652 ) (2,328 ) Unrealized gains (losses) included in OCI 30 — — — — Additions — — 955 — — Sales and settlements — — — — 4,668 Ending balance, September 30, 2018 $ 1,965 $ 13,112 $ 3,761 $ (23,000 ) $ (1,990 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at September 30, 2018 $ — $ (2,659 ) $ — $ (11,652 ) $ (2,328 ) Assets Measured at Fair Value on a Non-recurring Basis Certain assets are recorded at fair value on a non-recurring basis. Non-recurring fair value adjustments typically are a result of the application of lower of cost or fair value accounting occurring during the period recorded as a charge-off with associated provision expense or a write-down in non-interest expense. For example, if the fair value of an asset in these categories falls below its cost basis, it is considered to be at fair value at the end of the period of the adjustment. The following table presents assets measured at fair value on a non-recurring basis as of the dates indicated for which there was a fair value adjustment during the period. September 30, 2019 December 31, 2018 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans (1) $ — $ — $ 10,477 $ 10,477 $ — $ — $ 21,742 $ 21,742 Other loans held for sale — — — — — — 1,494 1,494 Other real estate — — 1,523 1,523 — — 3,827 3,827 Other assets held for sale — — 350 350 — — 1,104 1,104 (1) Collateral-dependent impaired loans that were written down to fair value during the period. ORE properties are included in other assets on the consolidated balance sheets. The carrying value of ORE at September 30, 2019 and December 31, 2018 was $13.7 million and $6.2 million , respectively. The following table presents fair value adjustments recognized in earnings for the three and nine months ended September 30, 2019 and 2018 for assets measured at fair value on a non-recurring basis still held at period-end. Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Impaired loans (1) $ 4,170 $ 1,223 $ 4,718 $ 4,594 Other real estate 74 61 569 61 Other assets held for sale — — 91 499 (1) Collateral-dependent impaired loans that were written down to fair value during the period. Fair Value of Financial Instruments The following tables present the carrying and fair values of financial instruments at September 30, 2019 and December 31, 2018 . The fair values represent management’s estimates based on various methodologies and assumptions. See "Part II - Item 8. Financial Statements and Supplementary Data - Note 1 - Summary of Significant Accounting Policies" to the consolidated financial statements of Synovus' 2018 Form 10-K for a description of how fair value measurements are determined. September 30, 2019 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 1,182,470 $ 1,182,470 $ 1,182,470 $ — $ — Trading securities 4,000 4,000 — 4,000 — Investment securities available for sale 6,892,162 6,892,162 19,782 6,870,389 1,991 Mortgage loans held for sale 129,415 129,415 — 129,415 — Private equity investments 11,289 11,289 — — 11,289 Mutual funds and mutual funds held in rabbi trusts 31,429 31,429 31,429 — — Loans, net 36,152,813 36,154,866 — — 36,154,866 GGL/SBA loans servicing asset 3,350 3,350 — — 3,350 Derivative assets 181,805 181,805 — 181,805 — Financial liabilities Non-interest-bearing deposits $ 9,586,148 $ 9,586,148 $ — $ 9,586,148 $ — Non-time interest-bearing deposits 18,313,513 18,313,513 — 18,313,513 — Time deposits 9,533,409 9,578,012 — 9,578,012 — Total deposits $ 37,433,070 $ 37,477,673 $ — $ 37,477,673 $ — Federal funds purchased and securities sold under repurchase agreements 197,419 197,419 197,419 — — Other short-term borrowings 2,233,593 2,233,593 — 2,233,593 — Long-term debt 2,153,600 2,176,073 — 2,176,073 — Earnout liability 24,810 24,810 — — 24,810 Derivative liabilities 44,685 44,685 — 41,350 3,335 December 31, 2018 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 1,143,564 $ 1,143,564 $ 1,143,564 $ — $ — Trading securities 3,130 3,130 1,128 2,002 — Investment securities available for sale 3,991,632 3,991,632 122,077 3,867,770 1,785 Mortgage loans held for sale 37,129 37,129 — 37,129 — Other loans for sale 1,506 1,506 — — 1,506 Private equity investments 11,028 11,028 — — 11,028 Mutual funds and mutual funds held in rabbi trusts 16,012 16,012 16,012 — — Loans, net 25,696,018 25,438,890 — — 25,438,890 GGL/SBA loans servicing asset 3,729 3,729 — — 3,729 Derivative assets 19,332 19,332 — 19,332 — Financial liabilities Non-interest-bearing deposits $ 7,650,967 $ 7,650,967 $ — $ 7,650,967 $ — Non-time interest-bearing deposits 14,065,959 14,065,959 — 14,065,959 — Time deposits 5,003,396 4,989,570 — 4,989,570 — Total deposits $ 26,720,322 $ 26,706,496 $ — $ 26,706,496 $ — Federal funds purchased and securities sold under repurchase agreements 237,692 237,692 237,692 — — Other short-term borrowings 650,000 650,000 — 650,000 — Long-term debt 1,657,157 1,649,642 — 1,649,642 — Earnout liability 14,353 14,353 — — 14,353 Derivative liabilities 18,208 18,208 — 16,535 1,673

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2019
Summary of Derivative Instruments [Abstract]
Derivative Instruments and Hedging Activities	Note 8 - Derivative Instruments and Hedging Activities Synovus utilizes derivative instruments to manage its exposure to various types of interest rate risk, exposures related to liquidity and credit risk, and to facilitate customer transactions. The primary types of derivative instruments utilized by Synovus consist of interest rate swaps, interest rate lock commitments made to prospective mortgage loan customers, commitments to sell fixed-rate mortgage loans, and foreign currency exchange forwards. Interest rate lock commitments represent derivative instruments since it is intended that such loans will be sold. 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. Hedging Derivatives Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. Synovus has entered into interest rate swap contracts to manage overall cash flow changes related to interest rate risk exposure on index-based variable rate loans. The contracts effectively modify Synovus' exposure to interest rate risk by utilizing receive fixed/pay index-based variable rate interest rate swaps. At September 30, 2019, Synovus' cash flow hedges are all forward-starting with effective start dates during the second quarter of 2020. For cash flow hedges, the effective and ineffective portions of the gain or loss related to the derivative instrument is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedge is terminated. As of September 30, 2019, the maximum length of time over which Synovus is hedging its exposure to the variability in future cash flows is through the second quarter of 2023. Synovus does not expect to reclassify amounts from accumulated other comprehensive income (loss) into interest income on cash flow hedges over the next twelve months. For derivative instruments that are not designated as hedging instruments, changes in the fair value of the derivatives are recognized in earnings immediately. Counterparty Credit Risk and Collateral Entering into derivative contracts potentially exposes Synovus to the risk of counterparties’ failure to fulfill their legal obligations, including, but not limited to, potential amounts due or payable under each derivative contract. Notional principal amounts are often used to express the volume of these transactions, but the amounts potentially subject to credit risk are much smaller. Synovus assesses the credit risk of its dealer counterparties by regularly monitoring publicly available credit rating information, evaluating other market indicators, and periodically reviewing detailed financials. Dealer collateral requirements are determined via risk-based policies and procedures and in accordance with existing agreements. Synovus seeks to minimize dealer credit risk by dealing with highly rated counterparties and by obtaining collateral for exposures above certain predetermined limits. Management closely monitors credit conditions within the customer swap portfolio, which management deems to be of higher risk than dealer counterparties. Collateral is secured at origination and credit-related fair value adjustments are recorded against the asset value of the derivative as deemed necessary based upon an analysis, which includes consideration of the current asset value of the swap, customer credit rating, collateral value, and customer standing with regards to its swap contractual obligations and other related matters. Such asset values fluctuate based upon changes in interest rates regardless of changes in notional amounts and changes in customer specific risk. Collateral Requirements Pursuant to the Dodd-Frank Act, certain derivative transactions have collateral requirements, both at the inception of the trade and as the value of each derivative position changes. As of September 30, 2019 , collateral totaling $105.5 million was pledged to the derivative counterparties to comply with collateral requirements. For derivatives cleared through central clearing houses, the variation margin payments made are legally characterized as settlements of the derivatives. As a result, these variation margin payments are netted against the fair value of the respective derivative contracts in the balance sheet and related disclosures. At September 30, 2019 and December 31, 2018 , Synovus had a variation margin of $141.1 million and $3.1 million respectively, each reducing the derivative liability. The following table reflects the notional amount and fair value of derivative instruments included on the consolidated balance sheets. September 30, 2019 December 31, 2018 Fair Value Fair Value (in thousands) Notional Amount Derivative Assets (1) Derivative Liabilities (2) Notional Amount Derivative Assets (1) Derivative Liabilities (2) Derivatives in cash flow hedging relationships: Interest rate contracts $ 1,000,000 $ 915 $ 2,097 — $ — $ — Total derivatives designated as hedging instruments $ 915 $ 2,097 $ — $ — Derivatives not designated Interest rate contracts (3) $ 6,402,871 $ 178,976 $ 38,702 $ 1,840,288 $ 18,388 $ 15,716 Mortgage derivatives - interest rate lock commitments 125,023 1,914 — 52,420 944 — Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans 161,500 — 407 65,500 — 819 Other contracts (4) 139,167 — 144 69,902 — — Visa derivative — — 3,335 — — 1,673 Total derivatives not designated as hedging instruments $ 180,890 $ 42,588 $ 19,332 $ 18,208 (1) Derivative assets are recorded in other assets on the consolidated balance sheets. (2) Derivative liabilities are recorded in other liabilities on the consolidated balance sheets. (3) Includes interest rate contracts for customer swaps and offsetting positions, net of variation margin payments. (4) Includes risk participation agreements sold. Synovus has entered into risk participation agreements with counterparties to transfer or assume credit exposures related to interest rate derivatives. The notional amounts of risk participation agreements sold were $139.2 million and $69.9 million at September 30, 2019 and December 31, 2018 , respectively. The notional amount of risk participation agreements purchased was $3.1 million at September 30, 2019 . Assuming all underlying third-party customers referenced in the swap contracts defaulted at September 30, 2019 and December 31, 2018 , the exposure from these agreements would not be material based on the fair value of the underlying swaps. Synovus also provides foreign currency exchange services, primarily forward contracts, with counterparties to allow commercial customers to mitigate exchange rate risk. Synovus covers its risk by entering into an offsetting foreign currency exchange forward contract. The notional amounts of foreign currency exchange forwards were $37.4 million and $28.8 million at September 30, 2019 and December 31, 2018 , respectively. The fair value of foreign currency exchange forwards was negligible at September 30, 2019 and December 31, 2018 due to the very short duration of these contracts. The pre-tax effect of changes in fair value from derivative instruments not designated as hedging instruments on the consolidated statements of income for the three and nine months ended September 30, 2019 and 2018 is presented below. Gain (Loss) Recognized in Consolidated Statements of Income Three Months Ended September 30, Nine Months Ended September 30, (in thousands) Location in Consolidated Statements of Income 2019 2018 2019 2018 Derivatives not designated as hedging instruments: Interest rate contracts (1) Capital markets income $ 549 $ 1 $ 640 $ (8 ) Other contracts (2) Capital markets income (144 ) — (144 ) — Mortgage derivatives - interest rate lock commitments Mortgage banking income 22 (427 ) 970 (61 ) Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans Mortgage banking income 642 495 413 376 Visa derivative Other non-interest expense (2,500 ) — (2,500 ) (2,328 ) Total derivatives not designated as hedging instruments $ (1,431 ) $ 69 $ (621 ) $ (2,021 ) (1) Gain (loss) represents net fair value adjustments (including credit-related adjustments and interest settlements on variation margin payments) for customer swaps and offsetting positions. (2) Includes risk participation agreements sold.

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Sep. 30, 2019
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 and nine months ended September 30, 2019 and 2018 . Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2019 2018 2019 2018 Basic Net Income Per Common Share: Net income available to common shareholders $ 127,435 $ 99,330 $ 397,505 $ 308,559 Weighted average common shares outstanding 152,238 117,241 156,819 118,096 Net income per common share, basic $ 0.84 $ 0.85 $ 2.53 $ 2.61 Diluted Net Income Per Common Share: Net income available to common shareholders $ 127,435 $ 99,330 $ 397,505 $ 308,559 Weighted average common shares outstanding 152,238 117,241 156,819 118,096 Effect of dilutive outstanding equity-based awards, warrants, and earnout payments 1,805 854 1,776 751 Weighted average diluted common shares 154,043 118,095 158,595 118,847 Net income per common share, diluted $ 0.83 $ 0.84 $ 2.51 $ 2.60 Basic net income per common share is computed by dividing net income available to common shareholders by the average common shares outstanding for the period. Diluted net income per common share reflects the dilution that could occur if securities or other contracts to issue common stock were exercised or converted. The dilutive effect of outstanding stock options, restricted share units, and warrants is reflected in diluted net income per common share, unless the impact is anti-dilutive, by application of the treasury stock method. As of September 30, 2019 , there were 40 thousand potentially dilutive shares related to stock options to purchase shares of common stock that were outstanding during 2019 , and as of September 30, 2018 , there were 2.2 million

Share-based Compensation

Share-based Compensation	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Share-based Compensation	Note 10 - Share-based Compensation As a result of the Merger on January 1, 2019, Synovus assumed 3.2 million outstanding FCB stock option awards and 136 thousand outstanding FCB restricted stock unit awards. Pursuant to the Merger Agreement, each stock option and restricted share unit outstanding on the Acquisition Date was assumed and converted into a stock option or restricted stock unit award relating to shares of Synovus common stock, with the same terms and conditions as were applicable under such award prior to the acquisition. The converted options and restricted share units had a fair value of $41.5 million on the Acquisition Date, of which $4.2 million was allocated to compensation expense and the remaining to purchase price. The estimated fair value of the converted restricted share units was based on Synovus' closing stock price on December 31, 2018, and the estimated fair value of the converted stock options was determined using a Hull-White model in a binomial lattice option pricing framework. Additionally, under the terms of the Merger Agreement, certain outstanding FCB non-vested equity awards with a fair value of $7.5 million on the Acquisition Date, accelerated vesting and converted automatically into the right to receive merger consideration at the merger exchange ratio of 1.055 , or an equivalent amount in cash, of which $3.9 million was allocated to merger-related compensation expense consisting of $3.5 million settled in equity and $400 thousand settled in cash with the remaining $3.5 million allocated to purchase price. The following tables summarize the status of Synovus' stock options, restricted share units, market restricted share units, and performance share units as of September 30, 2019 , and activity for the nine months ended September 30, 2019 . Stock Options (in thousands, except per share amounts) Quantity Weighted-Average Exercise Price Per Share Outstanding at January 1, 2019 640 $ 16.93 Assumed 3,230 23.22 Exercised (585 ) 20.10 Outstanding at September 30, 2019 3,285 $ 22.55 Restricted Share Units Market Restricted Share Units Performance Share Units (in thousands, except per share amounts) Quantity Weighted-Average Grant Date Fair Value Per Share Quantity Weighted-Average Grant Date Fair Value Per Share Quantity Weighted-Average Grant Date Fair Value Per Share Non-vested at January 1, 2019 526 $ 41.18 144 $ 41.91 248 $ 38.29 Granted 541 36.26 151 36.96 140 37.34 Assumed 136 31.99 — — — — Quantity change by TSR factor — — (19 ) 37.76 — — Dividend equivalents granted 17 36.26 4 36.96 13 37.34 Vested (298 ) 36.78 (58 ) 37.76 (93 ) 26.35 Forfeited (100 ) 36.43 (19 ) 40.94 (31 ) 40.34 Non-vested at September 30, 2019 822 $ 38.49 203 $ 39.80 277 $ 41.56 Total share-based compensation expense recognized for the three and nine months ended September 30, 2019 and 2018 is presented in the following table by its classification within total non-interest expense. Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Salaries and other personnel expense $ 4,992 $ 3,976 $ 16,705 $ 11,725 Merger-related expense — — 4,219 — Other operating expenses 179 208 472 779 Total share-based compensation expense included in non-interest expense $ 5,171 $ 4,184 $ 21,396 $ 12,504

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Note 11 - Leases Synovus’ leasing activities are primarily comprised of real estate leases used for retail branch locations and office space for core administrative and operating activities of Synovus’ banking and financial services business, and to a significantly lesser extent, certain equipment. The majority of these leases provide for fixed lease payments, including periodic escalators which are fixed at lease inception, however, a number of leases provide for variable lease payments where periodic increases in payment amounts are indexed to a consumer price index. Many leases include one or more options to renew which generally range from one to five years . Optional extension periods which are reasonably certain to be exercised in the future were included in the measurement of ROU assets and lease liabilities. Synovus’ leasing arrangements do not contain any material residual value guarantees, material restrictive covenants, or material end of lease purchase options. The following table presents the lease balances within the consolidated balance sheet as of September 30, 2019 . The difference between the asset and liability balance is primarily the result of lease liabilities that existed prior to the January 1, 2019 adoption of the new accounting guidance for leases. Leases (in thousands) Classification September 30, 2019 Assets Operating Other Assets $ 379,456 Finance Premises and Equipment, net (1) 3,011 Total leased assets $ 382,467 Liabilities Operating Other Liabilities $ 387,898 Finance Other Liabilities 2,767 Total lease liabilities $ 390,665 (1) Finance lease assets are recorded net of accumulated amortization of $671 thousand as of September 30, 2019 . For the three and nine months ended September 30, 2019 , the components of lease expense were as follows: Lease Cost (in thousands) Classification Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Operating lease cost, net (1) Net occupancy and equipment expense $ 8,199 $ 24,508 Finance lease cost Amortization of leased assets Net occupancy and equipment expense 223 671 Interest on lease liabilities Net occupancy and equipment expense 18 57 Sublease income (2) Net occupancy and equipment expense (157 ) (479 ) Net lease cost $ 8,283 $ 24,757 (1) Excludes variable and short-term lease costs, which are not material. (2) Sublease income excludes rental income from owned properties of $631 thousand and $1.9 million , respectively, for the three and nine months ended September 30, 2019 , which is also included in net occupancy and equipment expenses. The following table presents the weighted average remaining lease term and weighted average discount rates related to Synovus' leases as of September 30, 2019 : Lease Term and Discount Rate Weighted-average remaining lease term (years) Weighted-average discount rate (percentage) Operating leases 21.2 3.54 % Finance leases 4.03 2.42 Supplemental cash flow information related to the Company's leasing activities for the nine months ended September 30, 2019 are as follows: Other Information (in thousands) Nine Months Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities (1) Operating cash flows from operating leases $ (22,318 ) Operating cash flows from finance leases (57 ) Financing cash flows from finance leases (639 ) (1) Excludes sublease income which is not material. The following table presents the maturity of Synovus' lease liabilities as of September 30, 2019 : Maturity of Lease Liabilities (in thousands) Operating Leases Finance Leases Total 2019 $ 7,541 $ 193 $ 7,734 2020 30,164 871 31,035 2021 28,975 839 29,814 2022 28,235 465 28,700 2023 26,426 180 26,606 After 2023 443,238 343 443,581 Total lease payments $ 564,579 $ 2,891 $ 567,470 Less: Imputed interest 176,681 124 176,805 Present value of lease liabilities $ 387,898 $ 2,767 $ 390,665 As of September 30, 2019 , minimum lease payments related to operating leases that had not yet commenced were $11.2 million .
Leases	Note 11 - Leases Synovus’ leasing activities are primarily comprised of real estate leases used for retail branch locations and office space for core administrative and operating activities of Synovus’ banking and financial services business, and to a significantly lesser extent, certain equipment. The majority of these leases provide for fixed lease payments, including periodic escalators which are fixed at lease inception, however, a number of leases provide for variable lease payments where periodic increases in payment amounts are indexed to a consumer price index. Many leases include one or more options to renew which generally range from one to five years . Optional extension periods which are reasonably certain to be exercised in the future were included in the measurement of ROU assets and lease liabilities. Synovus’ leasing arrangements do not contain any material residual value guarantees, material restrictive covenants, or material end of lease purchase options. The following table presents the lease balances within the consolidated balance sheet as of September 30, 2019 . The difference between the asset and liability balance is primarily the result of lease liabilities that existed prior to the January 1, 2019 adoption of the new accounting guidance for leases. Leases (in thousands) Classification September 30, 2019 Assets Operating Other Assets $ 379,456 Finance Premises and Equipment, net (1) 3,011 Total leased assets $ 382,467 Liabilities Operating Other Liabilities $ 387,898 Finance Other Liabilities 2,767 Total lease liabilities $ 390,665 (1) Finance lease assets are recorded net of accumulated amortization of $671 thousand as of September 30, 2019 . For the three and nine months ended September 30, 2019 , the components of lease expense were as follows: Lease Cost (in thousands) Classification Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Operating lease cost, net (1) Net occupancy and equipment expense $ 8,199 $ 24,508 Finance lease cost Amortization of leased assets Net occupancy and equipment expense 223 671 Interest on lease liabilities Net occupancy and equipment expense 18 57 Sublease income (2) Net occupancy and equipment expense (157 ) (479 ) Net lease cost $ 8,283 $ 24,757 (1) Excludes variable and short-term lease costs, which are not material. (2) Sublease income excludes rental income from owned properties of $631 thousand and $1.9 million , respectively, for the three and nine months ended September 30, 2019 , which is also included in net occupancy and equipment expenses. The following table presents the weighted average remaining lease term and weighted average discount rates related to Synovus' leases as of September 30, 2019 : Lease Term and Discount Rate Weighted-average remaining lease term (years) Weighted-average discount rate (percentage) Operating leases 21.2 3.54 % Finance leases 4.03 2.42 Supplemental cash flow information related to the Company's leasing activities for the nine months ended September 30, 2019 are as follows: Other Information (in thousands) Nine Months Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities (1) Operating cash flows from operating leases $ (22,318 ) Operating cash flows from finance leases (57 ) Financing cash flows from finance leases (639 ) (1) Excludes sublease income which is not material. The following table presents the maturity of Synovus' lease liabilities as of September 30, 2019 : Maturity of Lease Liabilities (in thousands) Operating Leases Finance Leases Total 2019 $ 7,541 $ 193 $ 7,734 2020 30,164 871 31,035 2021 28,975 839 29,814 2022 28,235 465 28,700 2023 26,426 180 26,606 After 2023 443,238 343 443,581 Total lease payments $ 564,579 $ 2,891 $ 567,470 Less: Imputed interest 176,681 124 176,805 Present value of lease liabilities $ 387,898 $ 2,767 $ 390,665 As of September 30, 2019 , minimum lease payments related to operating leases that had not yet commenced were $11.2 million .

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 12 - 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. Synovus also has commitments to fund certain low-income housing investments. The contractual amount of these financial instruments represents Synovus' maximum credit risk should the counterparty draw upon the commitment, and should the counterparty subsequently fail to perform according to the terms of the contract. Since many of the commitments are expected to expire without being drawn upon, total commitment amounts do not necessarily represent future cash requirements. Additionally, certain commitments (primarily consumer) can generally be canceled by providing notice to the borrower. The ACL associated with unfunded commitments and letters of credit is a component of the unfunded commitments reserve recorded within other liabilities on the consolidated balance sheets. Additionally, unearned fees relating to letters of credit are recorded within other liabilities on the consolidated balance sheets. These amounts are not material to Synovus' consolidated balance sheets. Synovus invests in certain LIHTC partnerships which are engaged in the development and operation of affordable multi-family housing utilizing the LIHTC pursuant to Section 42 of the Code. Synovus typically acts as a limited partner in these investments and does not exert control over the operating or financial policies of the partnerships and as such, is not considered the primary beneficiary of the partnership. Synovus typically provides financing during the construction and development of the properties and is at risk for the amount of its equity investment plus the outstanding amount of any construction loans in excess of the fair value of the collateral for the loan but has no obligation to fund the operations or working capital of the partnerships and is not exposed to losses beyond Synovus’ investment. Synovus receives tax credits related to these investments which are subject to recapture by taxing authorities based on compliance features required to be met at the project level. (in thousands) September 30, 2019 December 31, 2018 Letters of credit* $ 203,224 $ 157,675 Commitments to fund commercial and industrial loans 6,702,472 5,527,017 Commitments to fund commercial real estate, construction, and land development loans 2,734,852 2,034,223 Commitments under home equity lines of credit 1,464,720 1,258,657 Unused credit card lines 899,379 775,003 Other loan commitments 487,698 400,983 Total unfunded lending commitments and letters of credit $ 12,492,345 $ 10,153,558 Investments in low income housing tax credit partnerships: Carrying amount included in other assets $ 108,025 $ 83,736 Amount of future funding commitments included in carrying amount 49,179 47,123 Short-term construction loans and letter of credit commitments 259 1,585 Funded portion of short-term loans and letters of credit 2,822 5,595 * Represent the contractual amount net of risk participations of approximately $33 million and $46 million at September 30, 2019 and December 31, 2018 , respectively. Merchant Services In accordance with credit and debit card association rules, Synovus sponsors various MPS businesses that process credit and debit card transactions on behalf of merchants. In connection with these services, a liability may arise in the event of a billing dispute between the merchant and a cardholder that is ultimately resolved in the cardholder's favor. If the merchant defaults on its obligations, the cardholder, through its issuing bank, generally has until six months after the date of the transaction to present a chargeback to the MPS, which is primarily liable for any losses on covered transactions. However, if the MPS fails to meet its obligations, then Synovus, as the sponsor, could be held liable for the disputed amount. Synovus seeks to mitigate this risk through its contractual arrangements with the MPS and the merchants by withholding future settlements, retaining cash reserve accounts and/or obtaining other security. For the three and nine months ended September 30, 2019 , the sponsored entities processed and settled $19.13 billion and $55.72 billion of transactions, respectively. For the three and nine months ended September 30, 2018 , the sponsored entities processed and settled $17.69 billion and $52.04 billion of transactions, respectively. Synovus began covering and has continued to cover chargebacks related to a particular MPS during 2019 and 2018 where the MPS’s cash reserve account was unavailable to support the chargebacks. As of September 30, 2019 , the remaining amount due to Synovus from the MPS is $21.7 million , which is included in other assets and classified in NPAs, compared to $22.9 million at December 31, 2018. While Synovus has contractual protections to mitigate against loss, repayment of the amounts owed to Synovus will depend in large part upon the continued financial viability and/or valuation of the MPS and the availability of any cash reserve accounts. Legal Proceedings Synovus and its subsidiaries are subject to various legal proceedings and claims that arise in the ordinary course of its business. Additionally, in the ordinary course of business, Synovus and its subsidiaries are subject to regulatory examinations, information gathering requests, tax matters, inquiries and investigations. Synovus, like many other financial institutions, has been the target of numerous legal actions and other proceedings asserting claims for damages and related relief for losses. These actions include claims and counterclaims asserted by individuals related to loans and allegations of violations of state and federal laws and regulations relating to banking practices, including putative class action matters and also claims asserted by shareholders or purported shareholders against Synovus, members of Synovus' Board of Directors, and members of Synovus' management team. In addition to actual damages, if Synovus does not prevail in asserted legal actions, credit-related litigation could result in additional write-downs or charge-offs of loans, which could adversely affect Synovus' results of operations during the period in which the write-down or charge-off were to occur. Synovus carefully examines and considers each legal matter, and, in those situations where Synovus determines that a particular legal matter presents loss contingencies that are both probable and reasonably estimable, Synovus establishes an appropriate reserve. An event is considered to be probable if the future event is likely to occur. While the final outcome of any legal proceeding is inherently uncertain, based on the information currently available, advice of counsel and available insurance coverage, management believes that the amounts accrued with respect to legal matters as of September 30, 2019 are adequate. The actual costs of resolving legal claims may be higher or lower than the amounts accrued. In addition, where Synovus determines that there is a reasonable possibility of a loss in respect of legal matters, Synovus considers whether it is able to estimate the total reasonably possible loss or range of loss. An event is “reasonably possible” if “the chance of the future event or events occurring is more than remote but less than likely.” An event is “remote” if “the chance of the future event or events occurring is more than slight but less than reasonably possible." In many situations, Synovus may be unable to estimate reasonably possible losses due to the preliminary nature of the legal matters, as well as a variety of other factors and uncertainties. For those legal matters where Synovus is able to estimate a range of reasonably possible losses, management currently estimates the aggregate range from our outstanding litigation is from zero to $5 million in excess of the amounts accrued, if any, related to those matters. This estimated aggregate range is based upon information currently available to Synovus, and the actual losses could prove to be lower or higher. As there are further developments in these legal matters, Synovus will reassess these matters, and the estimated range of reasonably possible losses may change as a result of this assessment. Based on Synovus' current knowledge and advice of counsel, management presently does not believe that the liabilities arising from these legal matters will have a material adverse effect on Synovus' consolidated financial condition, results of operations or cash flows. However, it is possible that the ultimate resolution of these legal matters could have a material adverse effect on Synovus' results of operations for any particular period.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
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' 2018 Form 10-K .
Reclassifications	Prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current periods' presentation.
Use of Estimates in the Preparation of Financial Statements	In preparing the 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 change relate to the determination of the ALL; estimates of fair value; income taxes; and contingent liabilities including legal matters, among others.
Purchased Loans	Purchased loans are recorded at fair value in accordance with ASC Topic 820, Fair Value Measurement , consistent with the exit price concept on the date of acquisition. Credit risk assumptions and resulting credit discounts are included in the determination of fair value; therefore, no ALL is recorded at the acquisition date. Pursuant to an AICPA letter dated December 18, 2009, the AICPA summarized the SEC staff's view regarding the accounting in subsequent periods for discount accretion associated with loan receivables acquired in a business combination or asset purchase. Regarding the accounting for such loan receivables, in the absence of further standard setting, the AICPA understands the SEC staff would not object to an accounting policy based on contractual cash flows (ASC Topic 310-20, Nonrefundable Fees and Other Costs ) or an accounting policy based on expected cash flows (ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality ). Synovus analogizes to ASC Topic 310-30 to account for the fair value discount. Purchased loans are evaluated upon acquisition as following the ASC 310-30 approach or ASC 310-20. Loans meeting the scope exception of ASC 310-30 (e.g. loans with revolving components) are not permitted to be analogized and will be accounted for in accordance with ASC 310-20. For ASC 310-30 loans, expected cash flows at the acquisition date in excess of the fair value of loans are recorded as interest income over the life of the loans using a level yield method if the timing and amount of the future cash flows is reasonably estimable. Subsequent to the acquisition date, increases in cash flows over those expected at the acquisition date are recognized prospectively as interest income. Decreases in expected cash flows due to credit deterioration are recognized by recording an ALL. Loan removals from pools due to pay-off or charge-off are removed at their carrying amount. The difference between the carrying amount and the amount received to satisfy the loan is recorded in interest income. For ASC 310-20 loans, the difference between the fair value and UPB of the loan at the acquisition date is amortized or accreted to interest income over the contractual life of the loans using the effective interest method. In the event of prepayment, the remaining unamortized amount is recognized in interest income in the quarter of prepayment. Due to the significant difference in accounting for ASC 310-30 loans, Synovus believes inclusion of these loans in certain asset quality ratios that reflect NPAs in the numerator or denominator (or both) results in significant distortion to these ratios. In addition, because loan level charge-offs related to ASC 310-30 loans are not recognized in the financial statements until the cumulative amounts exceed the original loss projections on a pool basis, the net charge-off ratio is inconsistent with the net charge-off ratio for other loan portfolios. The inclusion of ASC 310-30 loans in certain asset quality ratios could result in a lack of comparability across quarters or years, and could impact comparability with other portfolios that were not impacted by ASC 310-30 accounting. Synovus believes that presenting certain loan and asset quality disclosures separately for ASC 310-20 and ASC 310-30 loans, and/or excluding ASC 310-30 loans, where appropriate and indicated within each table, provides better perspective into underlying trends related to the quality of its loan portfolio.
Non-interest Income - Revenue from Contracts with Customers within the scope of ASC Topic 606	Synovus' contracts with customers generally do not contain terms that require significant judgment to determine the amount of revenue to recognize. Synovus' policies for recognizing non-interest income within the scope of ASC Topic 606, including the nature and timing of such revenue streams, are included below. Service Charges on Deposit Accounts : Revenue from service charges on deposit accounts is earned through cash management, wire transfer, and other deposit-related services, as well as overdraft, NSF, account management and other deposit-related fees. Revenue is recognized for these services either over time, corresponding with deposit accounts' monthly cycle, or at a point in time for transaction-related services and fees. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers' accounts. Fiduciary and Asset Management Fees : Fiduciary and asset management fees are primarily comprised of fees earned from the management and administration of trusts and other customer assets. Synovus' performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month-end through a direct charge to customers' accounts. Synovus does not earn performance-based incentives. Card Fees: Card fees consist primarily of interchange fees from consumer credit and debit cards processed by card association networks, as well as merchant discounts, and other card-related services. Interchange rates are generally set by the credit card associations and based on purchase volumes and other factors. Interchange fees and merchant discounts are recognized concurrently with the delivery of service on a daily basis as transactions occur. Payment is typically received immediately or in the following month. Card fees are reported net of certain associated expense items including loyalty program expenses and network expenses. Brokerage Revenue: Brokerage revenue consists primarily of commissions. Additionally, brokerage revenue includes advisory fees earned from the management of customer assets. Transactional revenues are based on the size and number of transactions executed at the client's direction and are generally recognized on the trade date with payment received on the settlement date. Advisory fees for brokerage services are recognized and collected monthly and are based upon the month-end market value of the assets under management at a rate predetermined in the contract. Capital Markets Income: Investment banking income, a component of capital markets income, is comprised primarily of securities underwriting fees and remarketing fees. Synovus assists corporate clients in raising capital by offering equity or debt securities to potential investors. The transaction fees are based on a percentage of the total transaction amount. The underwriting and remarketing fees are recognized on the trade date when the securities are sold to third-party investors with payment received on the settlement date. Insurance Revenue (included in other non-interest income on the consolidated statements of income): Insurance revenue primarily consists of commissions received on annuity and life product sales. The commissions are recognized as revenue when the customer executes an insurance policy with the insurance carrier. In some cases, Synovus receives payment of trailing commissions each year when the customer pays its annual premium. Other Fees (included in other non-interest income on the consolidated statements of income): Other fees within the scope of ASC Topic 606 primarily consist of revenues generated from safe deposit box rental fees and lockbox services. Fees are recognized over time, on a monthly basis, as Synovus' performance obligation for services is satisfied. Payment is received upfront for safe deposit box rentals and in the following month for lockbox services.
Accounting Standards Updates	Recently Adopted Accounting Standards ASU 2016-02, Leases (ASC 842) . Synovus adopted ASC 842 prospectively as of January 1, 2019 for existing leasing arrangements. As such, financial information was not updated and the disclosures required under the new standard are not presented for dates and periods prior to January 1, 2019. Refer to the 2018 10-K for lease disclosures surrounding prior period information reported under ASC 840, Leases. For leases that commenced prior to the effective date of ASC 842, Synovus elected the package of practical expedients not to reassess (a) whether existing contracts contain leases, (b) lease classification for existing leases, and (c) initial direct cost for any existing leases as well as the short-term lease recognition exemption for all leases that qualify. Additionally, Synovus did not elect the practical expedient to combine lease and non-lease components for all of our leases. Adoption of the new standard resulted in the recording of ROU assets and lease liabilities of $381.1 million and $391.0 million , respectively, as of January 1, 2019. These amounts were based on the present value of the remaining rental payments for existing leases and include consideration for renewal and termination options available that we were reasonably certain of exercising. The difference between the asset and liability balance is primarily the result of lease liabilities that existed prior to adoption of the new guidance. The adoption of the standard also resulted in a cumulative-effect adjustment, net of income taxes, to the beginning balance of retained earnings of $4.3 million ( $3.9 million of which consisted of deferred gains associated with sale-leaseback transactions that previously did not qualify for recognition). The ROU assets are included in other assets (other than $4.0 million of finance leases included in premises and equipment) on the consolidated balance sheet and the lease liabilities are included in other liabilities. Adoption of the standard did not materially impact our consolidated statements of income and had no impact on cash flows. Synovus determines if an arrangement is a lease at inception in accordance with ASC 842-10-15-3 and classifies leases as either operating or financing from a lessee perspective and operating or direct financing and sales-type from a lessor perspective based on criteria that are largely similar to those applied under ASC 840, Leases , but without explicit bright lines. ROU assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. The determination of future minimum lease payments includes consideration for extension or termination options when it is reasonably certain Synovus will exercise that option as well as rent escalation clauses (including market or index-based escalations) and abatements, capital improvement funding or other lease concessions. As most leases in Synovus' portfolio do not provide an implicit rate, Synovus utilizes a collateralized incremental borrowing rate, referenced to the Federal Home Loan Bank rates for borrowings of similar terms, based on the information available at lease commencement date in determining the present value of future payments. Additionally, for all real estate leases, Synovus applies a portfolio approach (based on lease term) in the application of the discount rate. Determination of the ROU asset also includes prepaid lease payments and amounts recognized relating to favorable or unfavorable lease terms from leases acquired through business combinations. For operating leases, minimum rental expense is recognized on a straight-line basis based on the fixed components of leasing arrangements. Variable lease components represent amounts that are not fixed in nature and are not tied to an index or rate, and are recognized as expense when incurred. For financing leases, rent expense is recognized as amortization expense on a straight-line basis and interest expense using the effective interest method. Additionally, leases with an initial term of 12 months or less are not recorded on the balance sheet; lease expense for these leases is recognized on a straight-line basis over the lease term. Net lease cost is recorded net of sublease income. For leases beginning in 2019 and later, lease components (e.g., base rent) are accounted for separately from non-lease components (e.g., common-area maintenance costs, real estate taxes and insurance costs). ASU 2017-04, Intangibles-Goodwill and Other, Simplifying the Test for Goodwill Impairment : In January 2017, the FASB issued ASU 2017- 04, which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Therefore, any carrying amount which exceeds the reporting unit’s fair value (up to the amount of goodwill recorded) will be recognized as an impairment loss. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those periods. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Synovus elected to early adopt the guidance, effective January 1, 2019. Synovus performed a qualitative assessment as allowed under ASC 350-20-35 during its annual impairment test as of June 30, 2019 and based on the assessment performed, management concluded goodwill was not impaired. As such, the adoption of this ASU had no impact. Recently Issued Accounting Standards Not Yet Adopted ASU 2016-13, Financial Instruments-Credit Losses (CECL). In June 2016, the FASB issued new guidance (CECL) related to credit losses. CECL (and all subsequent ASUs on this topic) replaces the existing incurred loss impairment guidance with an expected credit loss methodology. CECL will require management’s estimate of credit losses over the full remaining expected life of loans and other financial instruments. For Synovus, CECL will apply to loans, unfunded loan commitments, and debt securities available for sale and will be adopted on January 1, 2020. Upon adoption, for non-PCI (non-PCD under CECL) assets, Synovus will record a cumulative-effect adjustment to beginning retained earnings. In addition, CECL provides for a simplified accounting model for purchased financial assets with a more-than-insignificant amount of credit deterioration since their origination (PCD assets). The initial estimate of expected credit losses on PCD assets will be recognized through the ACL with an offset to the cost basis of the related financial asset at adoption. Synovus is continuing its implementation efforts which are led by a cross-functional steering committee. The committee meets periodically to discuss the latest developments and ensure progress compared to the planned timeline. Synovus shifted from limited to more comprehensive parallel testing during the third quarter of 2019. The results continue to be utilized to refine our models and estimation techniques. Documentation of new methodologies and internal controls that will be implemented as part of CECL as well as model validation is also in process. Implementation status updates are provided quarterly to executive management and the Audit Committee of Synovus' Board of Directors. Upon adoption of CECL, Synovus expects the ACL (allowance for credit losses which will apply to debt securities as well as loans and unfunded loan commitments) may increase by 40% to 60% compared to the incurred loss method. The increase is primarily driven by two factors: • the establishment of reserves for acquired loans independent of the fair value discount; and • longer duration consumer loans, due to the difference between loss emergence periods currently used versus the remaining life of the asset required under CECL. We expect the adoption impact of classifying PCI assets as PCD assets to represent approximately half of the ACL increase but, as previously noted, is not expected to impact equity. Additionally, the regulatory transition rules allow for a three-year phase-in of the day-one regulatory capital effects. Due to the combination of these factors, Synovus does not expect CECL adoption to have a material impact on regulatory capital ratios. However, Synovus is still in the process of refining estimates and these estimates involve significant judgment. The estimates provided above are subject to substantial change and will ultimately depend upon the composition of the loan portfolio, as well as economic conditions and forecasts at the time of CECL adoption.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Schedule of Business Acquisition	The following table reflects the consideration transferred for FCB's net assets and the identifiable assets purchased and liabilities assumed at their estimated fair values as of January 1, 2019. These fair value measurement estimates are based on third-party and internal valuations and reflect immaterial measurement period adjustments to the amounts reported as of March 31, 2019 (the income statement impact of such adjustments was immaterial). (in thousands) Consideration transferred: Synovus common stock issued and reissued from treasury attributed to purchase price (1) $ 1,582,133 Cash payments to FCB stockholders attributed to purchase price (2) 173 Fair value of exchanged employee and director equity awards and FCB warrants attributed to purchase price (1) 43,972 Total purchase price $ 1,626,278 Statement of Net Assets Acquired at Fair Value (Preliminary): Assets Cash and cash equivalents $ 201,689 Investment securities available for sale 2,301,001 Loans 9,292,991 Cash surrender value of bank-owned life insurance 216,848 Premises and equipment 45,412 Core deposit intangible 57,400 Other assets 269,304 Total Assets $ 12,384,645 Liabilities Deposits $ 10,930,724 Federal funds purchased and securities sold under repurchase agreements 29,139 Long-term debt 153,236 Other liabilities 75,818 Total Liabilities $ 11,188,917 Fair value of net identifiable assets acquired 1,195,728 Preliminary goodwill $ 430,550 (1) Based on Synovus' closing stock price of $31.99 on December 31, 2018. (2) $173 thousand of cash payment of $601 thousand attributed to purchase price with remaining allocated to compensation expense.
Business Acquisition, Pro Forma Information	The following table presents consolidated financial information included in Synovus' unaudited consolidated statements of income from the Acquisition Date through September 30, 2019 under the column "Actual from Acquisition Date." Synovus does not provide separate summary financial information of FCB from the Acquisition Date since it would be impracticable to do so as certain systems and processes were integrated during the second quarter of 2019. The following table also presents unaudited pro forma information as if the acquisition occurred on January 1, 2018 under the "Pro Forma" column. The unaudited pro forma results include the estimated impact of amortizing and accreting certain estimated purchase accounting adjustments such as intangible assets as well as fair value adjustments to loans and deposits. Merger-related expenses that occurred at the effective time of the Merger, or subsequent to the Merger are not reflected in the unaudited pro forma amounts. Cost savings are also not reflected in the unaudited pro forma amounts for the nine months ended September 30, 2018. The pro forma information does not necessarily reflect the results of operations that would have occurred had Synovus merged with FCB at the beginning of 2018. (in thousands) Actual from Acquisition Date (January 1, 2019) through September 30, 2019 (1) Pro Forma for Nine Months Ended September 30, 2018 Net interest income $ 1,196,535 $ 1,162,146 Non-interest income 257,945 236,042 Income before income taxes (1) 558,383 604,101 Net income available to common shareholders (1) 397,505 463,984 (1) Actual results for the nine months ended September 30, 2019 include pre-tax merger-related expense of $57.5 million .
Schedule of Acquisition Related Costs	In connection with the FCB acquisition, Synovus incurred merger-related expense totaling $0.4 million and $57.5 million for the three and nine months ended September 30, 2019 , primarily related to employment compensation agreements, severance, professional services, and contract termination charges, including the payment of $21.8 million related to employment agreements of certain FCB executives. Merger-related expense for the three and nine months ended September 30, 2019 is presented in the table below: (in thousands) Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Employment compensation agreements, severance, and other employee benefit costs $ — $ 34,762 Professional fees 131 17,122 All other expense (1) 222 5,609 Total merger-related expense $ 353 $ 57,493 (1) Primarily relates to fees associated with lease exit accruals, asset impairments related to the integration, and contract termination charges.

Investment Securities Availab_2

Investment Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2019
Investments [Abstract]
Summary of Available-for-Sale Investment Securities	The amortized cost, gross unrealized gains and losses, and estimated fair values of investment securities available for sale at September 30, 2019 and December 31, 2018 are summarized below. September 30, 2019 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 19,782 $ — $ — $ 19,782 U.S. Government agency securities 35,497 1,388 (8 ) 36,877 Mortgage-backed securities issued by U.S. Government agencies 69,141 730 (190 ) 69,681 Mortgage-backed securities issued by U.S. Government sponsored enterprises 4,970,420 99,289 (4,208 ) 5,065,501 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 656,311 9,612 (1 ) 665,922 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises 360,065 19,606 — 379,671 State and municipal securities 2,079 10 — 2,089 Asset-backed securities 497,045 9,442 (156 ) 506,331 Corporate debt securities 144,441 1,876 (9 ) 146,308 Total investment securities available for sale $ 6,754,781 $ 141,953 $ (4,572 ) $ 6,892,162 December 31, 2018 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities $ 123,436 $ — $ (1,359 ) $ 122,077 U.S. Government agency securities 38,021 361 — 38,382 Mortgage-backed securities issued by U.S. Government agencies 100,060 172 (3,027 ) 97,205 Mortgage-backed securities issued by U.S. Government sponsored enterprises 2,460,498 1,981 (63,829 ) 2,398,650 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 1,215,406 2,997 (29,885 ) 1,188,518 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises 131,492 613 (2,240 ) 129,865 Corporate debt securities 17,000 150 (215 ) 16,935 Total investment securities available for sale $ 4,085,913 $ 6,274 $ (100,555 ) $ 3,991,632
Schedule of Gross Unrealized Losses on Investment Securities and Fair Value	Gross unrealized losses on investment securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2019 and December 31, 2018 are presented below. September 30, 2019 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Government agency securities $ 1,046 $ (8 ) $ — $ — $ 1,046 $ (8 ) Mortgage-backed securities issued by U.S. Government agencies 3,381 (4 ) 11,333 (186 ) 14,714 (190 ) Mortgage-backed securities issued by U.S. Government sponsored enterprises 869,064 (2,271 ) 188,440 (1,937 ) 1,057,504 (4,208 ) Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises 527 (1 ) — — 527 (1 ) Asset-backed securities 64,235 (156 ) — — 64,235 (156 ) Corporate debt securities 1,991 (9 ) — — 1,991 (9 ) Total $ 940,244 $ (2,449 ) $ 199,773 $ (2,123 ) $ 1,140,017 $ (4,572 ) December 31, 2018 Less than 12 Months 12 Months or Longer Total (in thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses U.S. Treasury securities $ 39,031 $ (118 ) $ 63,570 $ (1,241 ) $ 102,601 $ (1,359 ) Mortgage-backed securities issued by U.S. Government agencies 2,059 (2 ) 79,736 (3,025 ) 81,795 (3,027 ) Mortgage-backed securities issued by U.S. Government sponsored enterprises 130,432 (700 ) 2,105,358 (63,129 ) 2,235,790 (63,829 ) Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 964,732 (29,885 ) 964,732 (29,885 ) Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises 58,998 (1,298 ) 44,220 (942 ) 103,218 (2,240 ) Corporate debt securities — — 1,785 (215 ) 1,785 (215 ) Total $ 230,520 $ (2,118 ) $ 3,259,401 $ (98,437 ) $ 3,489,921 $ (100,555 )
Amortized Cost and Estimated Fair Value by Contractual Maturity of Investment Securities Available-for-Sale	For purposes of the maturity table, mortgage-backed securities and CMOs, which are not due at a single maturity date, have been classified based on the final contractual maturity date. Distribution of Maturities at September 30, 2019 (in thousands) Within One 1 to 5 5 to 10 More Than Total Amortized Cost U.S. Treasury securities $ 19,782 $ — $ — $ — $ 19,782 U.S. Government agency securities 585 4,926 29,986 — 35,497 Mortgage-backed securities issued by U.S. Government agencies — 821 2,037 66,283 69,141 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 5,807 132,548 4,832,065 4,970,420 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 345 655,966 656,311 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 22,632 250,321 87,112 360,065 State and municipal securities — — 1,066 1,013 2,079 Asset-backed securities — — 377,474 119,571 497,045 Corporate debt securities 24,280 84,864 33,297 2,000 144,441 Total amortized cost $ 44,647 $ 119,050 $ 827,074 $ 5,764,010 $ 6,754,781 Fair Value U.S. Treasury securities $ 19,782 $ — $ — $ — $ 19,782 U.S. Government agency securities 592 4,954 31,331 — 36,877 Mortgage-backed securities issued by U.S. Government agencies — 825 2,077 66,779 69,681 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 5,811 135,778 4,923,912 5,065,501 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — — 353 665,569 665,922 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 23,152 264,048 92,471 379,671 State and municipal securities — — 1,069 1,020 2,089 Asset-backed securities — — 385,587 120,744 506,331 Corporate debt securities 24,421 85,851 34,045 1,991 146,308 Total fair value $ 44,795 $ 120,593 $ 854,288 $ 5,872,486 $ 6,892,162
Schedule of Sales Activities of Available-for-Sale Securities	Proceeds from sales, gross gains, and gross losses on sales of securities available for sale for the three and nine months ended September 30, 2019 and 2018 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 September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Proceeds from sales of investment securities available for sale $ 709,464 $ — $ 2,002,137 $ 35,066 Gross realized gains on sales 140 — 9,270 — Gross realized losses on sales (3,871 ) — (14,772 ) (1,296 ) Investment securities losses, net $ (3,731 ) $ — $ (5,502 ) $ (1,296 )

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Loans and Allowance for Loan Losses [Abstract]
Schedule of Current, Accruing Past Due, and Non-accrual Loans	The following tables provide a summary of current, accruing past due, and non-accrual loans separately reported by originated (loans originated, renewed, refinanced, modified, or otherwise underwritten by Synovus) and acquired loans from business combinations by portfolio class as of September 30, 2019 and December 31, 2018 . See "Part I - Item 1. Financial Statements and Supplementary Data - Note 1 - Basis of Presentation" in this Report for more information on Synovus' accounting for purchased loans. Current, Accruing Past Due, and Non-accrual Originated Loans September 30, 2019 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 8,003,162 $ 15,997 $ 989 $ 16,986 $ 64,912 $ 8,085,060 Owner-occupied 5,572,063 6,068 1,617 7,685 9,222 5,588,970 Total commercial and industrial 13,575,225 22,065 2,606 24,671 74,134 13,674,030 Investment properties 6,055,365 1,714 902 2,616 378 6,058,359 1-4 family properties 634,144 2,928 834 3,762 2,218 640,124 Land and development 401,491 3,311 — 3,311 3,032 407,834 Total commercial real estate 7,091,000 7,953 1,736 9,689 5,628 7,106,317 Consumer mortgages 3,382,636 6,069 — 6,069 10,015 3,398,720 Home equity lines 1,596,081 7,354 38 7,392 12,590 1,616,063 Credit cards 262,724 2,657 2,493 5,150 — 267,874 Other consumer loans 2,261,276 18,527 780 19,307 4,736 2,285,319 Total consumer 7,502,717 34,607 3,311 37,918 27,341 7,567,976 Total loans $ 28,168,942 $ 64,625 $ 7,653 $ 72,278 $ 107,103 $ 28,348,323 (1) Current, Accruing Past Due, and Non-accrual Acquired Loans September 30, 2019 (in thousands) Current Accruing 30-89 Days Past Due (2) Accruing 90 Days or Greater Past Due (2) Total Accruing Past Due (2) Non-accrual (2) ASC 310-30 Loans Discount/Premium Total Commercial, financial and agricultural $ 658,014 $ 648 $ — $ 648 $ 5,000 $ 1,120,805 $ (13,646 ) $ 1,770,821 Owner-occupied 91,651 — — — — 913,716 (4,946 ) 1,000,421 Total commercial and industrial 749,665 648 — 648 5,000 2,034,521 (18,592 ) 2,771,242 Investment properties 917,663 — — — — 1,973,932 (15,191 ) 2,876,404 1-4 family properties 55,674 — — — — 43,208 (242 ) 98,640 Land and development 114,642 — — — — 92,829 (2,799 ) 204,672 Total commercial real estate 1,087,979 — — — — 2,109,969 (18,232 ) 3,179,716 Consumer mortgages 97,107 — — — — 2,045,872 (70,969 ) 2,072,010 Home equity lines 60,565 201 — 201 — 2,377 (4,114 ) 59,029 Other consumer loans 311 — — — — 10,790 (934 ) 10,167 Total consumer 157,983 201 — 201 — 2,059,039 (76,017 ) 2,141,206 Total loans $ 1,995,627 $ 849 $ — $ 849 $ 5,000 $ 6,203,529 $ (112,841 ) $ 8,092,164 (3) Current, Accruing Past Due, and Non-accrual Loans December 31, 2018 (in thousands) Current Accruing 30-89 Days Past Due Accruing 90 Days or Greater Past Due Total Accruing Past Due Non-accrual Total Commercial, financial and agricultural $ 7,372,301 $ 7,988 $ 114 $ 8,102 $ 69,295 $ 7,449,698 Owner-occupied 5,317,023 5,433 81 5,514 8,971 5,331,508 Total commercial and industrial 12,689,324 13,421 195 13,616 78,266 12,781,206 Investment properties 5,557,224 1,312 34 1,346 2,381 5,560,951 1-4 family properties 674,648 2,745 96 2,841 2,381 679,870 Land and development 319,978 739 — 739 2,953 323,670 Total commercial real estate 6,551,850 4,796 130 4,926 7,715 6,564,491 Consumer mortgages 2,922,136 7,150 — 7,150 4,949 2,934,235 Home equity lines 1,496,562 7,092 28 7,120 12,114 1,515,796 Credit cards 252,832 3,066 2,347 5,413 — 258,245 Other consumer loans 1,894,352 17,604 1,098 18,702 3,689 1,916,743 Total consumer 6,565,882 34,912 3,473 38,385 20,752 6,625,019 Total loans $ 25,807,056 $ 53,129 $ 3,798 $ 56,927 $ 106,733 $ 25,970,716 (4) (1) Total before net deferred fees and costs of $22.7 million . (2) For purposes of this table, non-performing and past due loans exclude acquired loans accounted for under ASC 310-30. (3) Represents $9.29 billion (at fair value) of loans acquired from FCB, net of paydowns and payoffs including maturities since Acquisition Date. (4) Total before net deferred fees and costs of $24.1 million .
Loan Portfolio Credit Exposure	In the following tables, consumer loans are generally assigned a risk grade similar to the classifications described above; however, upon reaching 90 days and 120 days past due, they are generally downgraded to Substandard and Loss, respectively, in accordance with the FFIEC Retail Credit Classification Policy. Additionally, in accordance with Interagency Supervisory Guidance, the risk grade classifications of consumer loans (consumer mortgages and HELOCs) secured by junior liens on 1-4 family residential properties also consider available information on the payment status of any associated senior liens with other financial institutions. Originated Loan Portfolio Credit Exposure by Risk Grade September 30, 2019 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss (3) Total Commercial, financial and agricultural $ 7,816,114 $ 104,214 $ 156,919 $ 7,813 $ — $ 8,085,060 Owner-occupied 5,493,248 19,647 76,002 73 — 5,588,970 Total commercial and industrial 13,309,362 123,861 232,921 7,886 — 13,674,030 Investment properties 6,007,116 20,549 30,694 — — 6,058,359 1-4 family properties 628,631 3,558 7,935 — — 640,124 Land and development 386,163 9,878 11,793 — — 407,834 Total commercial real estate 7,021,910 33,985 50,422 — — 7,106,317 Consumer mortgages 3,388,412 — 9,859 373 76 3,398,720 Home equity lines 1,600,061 — 14,683 21 1,298 1,616,063 Credit cards 265,382 — 822 — 1,670 (4) 267,874 Other consumer loans 2,280,305 — 5,014 — — 2,285,319 Total consumer 7,534,160 — 30,378 394 3,044 7,567,976 Total loans $ 27,865,432 $ 157,846 $ 313,721 $ 8,280 $ 3,044 $ 28,348,323 (5) Acquired Loan Portfolio Credit Exposure by Risk Grade September 30, 2019 (in thousands) Pass Special Mention Substandard (1) Doubtful Loss Total Commercial, financial and agricultural $ 1,701,326 $ 48,615 $ 20,880 $ — $ — $ 1,770,821 Owner-occupied 971,075 24,039 5,307 — — 1,000,421 Total commercial and industrial 2,672,401 72,654 26,187 — — 2,771,242 Investment properties 2,842,820 27,488 6,096 — — 2,876,404 1-4 family properties 98,316 — 324 — — 98,640 Land and development 197,957 6,588 127 — — 204,672 Total commercial real estate 3,139,093 34,076 6,547 — — 3,179,716 Consumer mortgages 2,064,108 — 7,902 — — 2,072,010 Home equity lines 58,983 — 46 — — 59,029 Other consumer loans 10,167 — — — — 10,167 Total consumer 2,133,258 — 7,948 — — 2,141,206 Total loans $ 7,944,752 $ 106,730 $ 40,682 $ — $ — $ 8,092,164 (6) Loan Portfolio Credit Exposure by Risk Grade December 31, 2018 (in thousands) Pass Special Mention Substandard (1) Doubtful (2) Loss (3) Total Commercial, financial and agricultural $ 7,190,517 $ 118,188 $ 140,218 $ 775 $ — $ 7,449,698 Owner-occupied 5,212,473 55,038 63,572 425 — 5,331,508 Total commercial and industrial 12,402,990 173,226 203,790 1,200 — 12,781,206 Investment properties 5,497,344 40,516 23,091 — — 5,560,951 1-4 family properties 663,692 6,424 9,754 — — 679,870 Land and development 297,855 12,786 13,029 — — 323,670 Total commercial real estate 6,458,891 59,726 45,874 — — 6,564,491 Consumer mortgages 2,926,712 — 7,425 98 — 2,934,235 Home equity lines 1,501,316 — 13,130 174 1,176 1,515,796 Credit cards 255,904 — 858 — 1,483 (4) 258,245 Other consumer loans 1,912,902 — 3,841 — — 1,916,743 Total consumer 6,596,834 — 25,254 272 2,659 6,625,019 Total loans $ 25,458,715 $ 232,952 $ 274,918 $ 1,472 $ 2,659 $ 25,970,716 (7) (1) Includes $249.8 million and $172.3 million of Substandard accruing loans at September 30, 2019 and December 31, 2018 , respectively. (2) The loans within this risk grade are on non-accrual status and generally have an ALL equal to 50% of the loan amount. (3) The loans within this risk grade are on non-accrual status and have an ALL 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 ALL equal to the full loan amount and are generally charged off upon reaching 181 days past due in accordance with the FFIEC Retail Credit Classification Policy. (5) Total before net deferred fees and costs of $22.7 million . (6) Represents $9.29 billion (at fair value) of loans acquired from FCB, net of paydowns and payoffs including maturities since Acquisition Date. (7) Total before net deferred fees and costs of $24.1 million .
Schedule of Acquired Loan Portfolio	Information about the acquired FCB loan portfolio accounted for under ASC 310-30 as of the Acquisition Date is in the following table. (in thousands) ASC 310-30 Loans Contractually required principal and interest at acquisition $ 8,377,942 Non-accretable difference (expected losses and foregone interest) (163,147 ) Cash flows expected to be collected at acquisition 8,214,795 Accretable yield (1,066,689 ) Basis in ASC 310-30 loans at acquisition $ 7,148,106
Schedule of Changes in Accretable Difference	The following table is a summary of changes in the accretable yield for all loans accounted for under ASC 310-30 for the nine months ended September 30, 2019 . (in thousands) Nine Months Ended September 30, 2019 Beginning balance $ — Additions 1,066,689 Transfers from non-accretable difference to accretable yield (1) 13,516 Accretion (273,231 ) Changes in expected cash flows not affecting non-accretable differences (2) 24,929 Ending balance $ 831,903 (1) Represents improvement in the credit component of expected cash flows. (2)
Schedule of Allowances for Loan Losses and Recorded Investment in Loans	The following tables detail the changes in the ALL by loan segment for the three and nine months ended September 30, 2019 and 2018 . Allowance for Loan Losses and Recorded Investment in Loans As Of and For the Three Months Ended September 30, 2019 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 138,004 $ 63,463 $ 55,909 $ 257,376 Charge-offs (15,425 ) (3,275 ) (6,026 ) (24,726 ) Recoveries 2,276 1,490 1,035 4,801 Provision for (reversal of) loan losses 17,156 280 10,126 27,562 Ending balance (1) $ 142,011 $ 61,958 $ 61,044 $ 265,013 Ending balance: individually evaluated for impairment $ 14,139 $ 1,184 $ 881 $ 16,204 Ending balance: collectively evaluated for impairment $ 127,872 $ 60,774 $ 60,163 $ 248,809 Loans: Ending balance: total loans (2) $ 16,445,272 $ 10,286,033 $ 9,709,182 $ 36,440,487 Ending balance: individually evaluated for impairment $ 139,160 $ 28,797 $ 31,459 $ 199,416 Ending balance: collectively evaluated for impairment (3) $ 14,292,323 $ 8,163,218 $ 7,687,835 $ 30,143,376 Ending balance: acquired loans accounted for under ASC 310-30 (4) $ 2,013,789 $ 2,094,018 $ 1,989,888 $ 6,097,695 As Of and For the Three Months Ended September 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 130,335 $ 75,205 $ 46,185 $ 251,725 Charge-offs (13,526 ) (1,077 ) (3,993 ) (18,596 ) Recoveries 1,091 591 1,657 3,339 Provision for loan losses 11,417 (1,447 ) 5,012 14,982 Ending balance $ 129,317 $ 73,272 $ 48,861 $ 251,450 Ending balance: individually evaluated for impairment $ 9,108 $ 3,317 $ 970 $ 13,395 Ending balance: collectively evaluated for impairment $ 120,209 $ 69,955 $ 47,891 $ 238,055 Loans: Ending balance: total loans (5)(6) $ 12,503,294 $ 6,712,406 $ 6,385,197 $ 25,600,897 Ending balance: individually evaluated for impairment $ 102,671 $ 37,988 $ 28,963 $ 169,622 Ending balance: collectively evaluated for impairment $ 12,400,623 $ 6,674,418 $ 6,356,234 $ 25,431,275 (1) As of and for the three months ended September 30, 2019 , there was no ALL for acquired loans accounted for under ASC 310-30. (2) Total before net deferred fees and costs of $22.7 million . (3) These loans are presented net of the remaining fair value discount of $7.0 million at September 30, 2019 . (4) These loans are presented net of the remaining fair value discount of $105.8 million at September 30, 2019 . (5) Total before net deferred fees and costs of $23.8 million . (6) As of and for the three months ended September 30, 2018 , there were no PCI loans and no ALL for PCI loans. Allowance for Loan Losses and Recorded Investment in Loans As Of and For the Nine Months Ended September 30, 2019 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 133,123 $ 68,796 $ 48,636 $ 250,555 Charge-offs (39,558 ) (5,369 ) (17,363 ) (62,290 ) Recoveries 6,087 3,788 3,623 13,498 Provision for (reversal of) loan losses 42,359 (5,257 ) 26,148 63,250 Ending balance (1) $ 142,011 $ 61,958 $ 61,044 $ 265,013 Ending balance: individually evaluated for impairment $ 14,139 $ 1,184 $ 881 $ 16,204 Ending balance: collectively evaluated for impairment $ 127,872 $ 60,774 $ 60,163 $ 248,809 Loans: Ending balance: total loans (2) $ 16,445,272 $ 10,286,033 $ 9,709,182 $ 36,440,487 Ending balance: individually evaluated for impairment $ 139,160 $ 28,797 $ 31,459 $ 199,416 Ending balance: collectively evaluated for impairment (3) $ 14,292,323 $ 8,163,218 $ 7,687,835 $ 30,143,376 Ending balance: acquired loans accounted for under ASC 310-30 (4) $ 2,013,789 $ 2,094,018 $ 1,989,888 $ 6,097,695 As Of and For the Nine Months Ended September 30, 2018 (in thousands) Commercial & Industrial Commercial Real Estate Consumer Total Allowance for loan losses: Beginning balance $ 126,803 $ 74,998 $ 47,467 $ 249,268 Charge-offs (37,312 ) (3,523 ) (13,888 ) (54,723 ) Recoveries 5,086 7,555 4,716 17,357 Provision for (reversal of) loan losses 34,740 (5,758 ) 10,566 39,548 Ending balance $ 129,317 $ 73,272 $ 48,861 $ 251,450 Ending balance: individually evaluated for impairment $ 9,108 $ 3,317 $ 970 $ 13,395 Ending balance: collectively evaluated for impairment $ 120,209 $ 69,955 $ 47,891 $ 238,055 Loans: Ending balance: total loans (5)(6) $ 12,503,294 $ 6,712,406 $ 6,385,197 $ 25,600,897 Ending balance: individually evaluated for impairment $ 102,671 $ 37,988 $ 28,963 $ 169,622 Ending balance: collectively evaluated for impairment $ 12,400,623 $ 6,674,418 $ 6,356,234 $ 25,431,275 (1) As of and for the nine months ended September 30, 2019 , there was no ALL for acquired loans accounted for under ASC 310-30. (2) Total before net deferred fees and costs of $22.7 million . (3) These loans are presented net of the remaining fair value discount of $7.0 million at September 30, 2019 . (4) These loans are presented net of the remaining fair value discount of $105.8 million at September 30, 2019 . (5) Total before net deferred fees and costs of $23.8 million . (6) As of and for the nine months ended September 30, 2018 , there were no PCI loans and no ALL for PCI loans.
Schedule of Impaired Loans	Below is a detailed summary of impaired loans (including TDRs) by class as of September 30, 2019 and December 31, 2018 and for the three and nine months ended September 30, 2019 and 2018 . At September 30, 2019 and December 31, 2018 , impaired loans of $69.4 million and $51.3 million , respectively, were on non-accrual status. Impaired Loans (including accruing TDRs) September 30, 2019 December 31, 2018 Recorded Investment Recorded Investment (in thousands) Unpaid Principal Balance Without an ALL With an ALL Related Allowance Unpaid Principal Balance Without an ALL With an ALL Related Allowance Commercial, financial and agricultural $ 104,229 $ 33,534 $ 55,413 $ 11,267 $ 65,150 $ 22,298 $ 34,222 $ 7,133 Owner-occupied 50,493 — 50,213 2,872 49,588 — 48,902 3,074 Total commercial and industrial 154,722 33,534 105,626 14,139 114,738 22,298 83,124 10,207 Investment properties 12,307 — 12,307 555 13,916 — 13,916 1,523 1-4 family properties 5,064 — 5,005 117 5,586 — 5,586 131 Land and development 12,752 1,055 10,430 512 16,283 265 13,431 944 Total commercial real estate 30,123 1,055 27,742 1,184 35,785 265 32,933 2,598 Consumer mortgages 18,881 874 17,707 372 19,506 — 19,506 343 Home equity lines 6,360 — 6,282 278 3,264 — 3,235 224 Other consumer loans 6,596 — 6,596 231 5,565 — 5,565 177 Total consumer 31,837 874 30,585 881 28,335 — 28,306 744 Total loans $ 216,682 $ 35,463 $ 163,953 $ 16,204 $ 178,858 $ 22,563 $ 144,363 $ 13,549 Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 (in thousands) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Commercial, financial and agricultural $ 85,487 $ 620 $ 61,254 $ 379 Owner-occupied 50,929 504 44,366 574 Total commercial and industrial 136,416 1,124 105,620 953 Investment properties 12,518 156 14,103 179 1-4 family properties 5,277 125 9,697 176 Land and development 11,375 32 16,822 62 Total commercial real estate 29,170 313 40,622 417 Consumer mortgages 19,278 206 19,966 226 Home equity lines 5,705 47 3,433 34 Other consumer loans 6,221 99 5,284 69 Total consumer 31,204 352 28,683 329 Total loans $ 196,790 $ 1,789 $ 174,925 $ 1,699 (1) Of the interest income recognized during the three months ended September 30, 2019 and 2018 , cash-basis interest income was $310 thousand and $391 thousand , respectively. Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 (in thousands) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Commercial, financial and agricultural $ 82,745 $ 1,558 $ 69,546 $ 1,230 Owner-occupied 50,839 1,644 40,171 1,388 Total commercial and industrial 133,584 3,202 109,717 2,618 Investment properties 12,829 453 20,437 597 1-4 family properties 5,294 391 10,876 619 Land and development 11,166 101 17,807 212 Total commercial real estate 29,289 945 49,120 1,428 Consumer mortgages 19,627 635 20,397 621 Home equity lines 4,619 119 4,642 136 Other consumer loans 5,874 259 5,220 212 Total consumer 30,120 1,013 30,259 969 Total loans $ 192,993 $ 5,160 $ 189,096 $ 5,015 (1) Of the interest income recognized during the nine months ended September 30, 2019 and 2018 , cash-basis interest income was $1.0 million and $926 thousand , respectively.
Troubled Debt Restructurings	Information about Synovus' TDRs is presented in the following tables. Modifications of loans that are accounted for within a pool under ASC Topic 310-30 are excluded as TDRs. Accordingly, such modifications do not result in the removal of those loans from the pool, even if the modification of those loans would otherwise be considered a TDR. As a result, all such acquired loans that would otherwise meet the criteria for classification as a TDR are excluded from the tables below. The following tables represent, by concession type, the post-modification balance for loans modified or renewed during the three and nine months ended September 30, 2019 and 2018 that were reported as accruing or non-accruing TDRs. TDRs by Concession Type Three Months Ended September 30, 2019 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 27 $ 2,577 $ 1,917 $ 4,494 Owner-occupied 7 2,822 861 3,683 Total commercial and industrial 34 5,399 2,778 8,177 Investment properties 4 385 — 385 1-4 family properties 4 766 — 766 Land and development 1 473 — 473 Total commercial real estate 9 1,624 — 1,624 Consumer mortgages 10 1,008 118 1,126 Home equity lines 25 364 1,635 1,999 Other consumer loans 27 473 1,222 1,695 Total consumer 62 1,845 2,975 4,820 Total TDRs 105 $ 8,868 $ 5,753 $ 14,621 (2) Three Months Ended September 30, 2018 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 7 $ — $ 565 $ 565 Owner-occupied 3 727 4,839 5,566 Total commercial and industrial 10 727 5,404 6,131 Investment properties 1 42 — 42 1-4 family properties 5 445 766 1,211 Land and development 1 — 71 71 Total commercial real estate 7 487 837 1,324 Consumer mortgages 2 670 — 670 Home equity lines 1 — 191 191 Other consumer loans 44 695 2,784 3,479 Total consumer 47 1,365 2,975 4,340 Total TDRs 64 $ 2,579 $ 9,216 $ 11,795 (3) (1) Other concessions generally include term extensions, interest only payments for a period of time, or principal forgiveness, but there was no principal forgiveness for each of the three months ended September 30, 2019 and 2018 . (2) No net charge-offs were recorded during the three months ended September 30, 2019 upon restructuring of these loans . (3) Net charge-offs of $88 thousand were recorded during the three months ended September 30, 2018 upon restructuring of these loans. TDRs by Concession Type Nine Months Ended September 30, 2019 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 61 $ 5,703 $ 4,404 $ 10,107 Owner-occupied 13 4,854 861 5,715 Total commercial and industrial 74 10,557 5,265 15,822 Investment properties 6 1,048 — 1,048 1-4 family properties 14 2,072 — 2,072 Land and development 3 641 — 641 Total commercial real estate 23 3,761 — 3,761 Consumer mortgages 15 1,245 1,332 2,577 Home equity lines 50 2,686 1,740 4,426 Other consumer loans 79 1,167 3,599 4,766 Total consumer 144 5,098 6,671 11,769 Total TDRs 241 $ 19,416 $ 11,936 $ 31,352 (2 ) Nine Months Ended September 30, 2018 (in thousands, except contract data) Number of Contracts Below Market Interest Rate Other Concessions (1) Total Commercial, financial and agricultural 21 $ — $ 2,130 $ 2,130 Owner-occupied 9 5,526 5,523 11,049 Total commercial and industrial 30 5,526 7,653 13,179 Investment properties 4 6,053 2,215 8,268 1-4 family properties 12 1,408 1,259 2,667 Land and development 4 — 1,856 1,856 Total commercial real estate 20 7,461 5,330 12,791 Consumer mortgages 16 5,365 87 5,452 Home equity lines 4 172 339 511 Other consumer loans 75 1,621 3,606 5,227 Total consumer 95 7,158 4,032 11,190 Total TDRs 145 $ 20,145 $ 17,015 $ 37,160 (3) (1) Other concessions generally include term extensions, interest only payments for a period of time, or principal forgiveness, but there was no principal forgiveness for each of the nine months ended September 30, 2019 and 2018 . (2) No net charge-offs were recorded during the nine months ended September 30, 2019 upon restructuring of these loans. (3) Net charge-offs of $88 thousand were recorded during the nine months ended September 30, 2018 upon restructuring of these loans.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Changes to the carrying amount of goodwill by reporting unit for the nine months ended September 30, 2019 are provided in the following table. There were no changes to the carrying amount of goodwill during the year ended December 31, 2018 . (in thousands) Synovus Bank Reporting Unit Trust Services Reporting Unit Total Balance as of December 31, 2018 $ 32,884 $ 24,431 $ 57,315 Goodwill acquired during the year (preliminary allocation) and adjustments 430,550 — 430,550 Balance as of September 30, 2019 $ 463,434 $ 24,431 $ 487,865
Schedule of Other Intangible Assets	The following table shows the gross carrying amount and accumulated amortization of other intangible assets as of September 30, 2019 and December 31, 2018 , which primarily consist of core deposit intangible assets acquired in the FCB acquisition. Core deposit intangible assets were $49.6 million at September 30, 2019 . The CDI is being amortized over its estimated useful life of approximately ten years utilizing an accelerated method. Amortization expense recognized on intangible assets for the three and nine months ended September 30, 2019 , was $2.9 million and $8.7 million , respectively. Amortization expense recognized on intangible assets for the three and nine months ended September 30, 2018 was $292 thousand and $875 thousand , respectively. (in thousands) September 30, 2019 December 31, 2018 Other intangible assets, gross carrying amount $ 70,328 $ 12,928 Other intangible assets, accumulated amortization (11,756 ) (3,053 ) Other intangible assets, net carrying amount $ 58,572 $ 9,875

Shareholders' Equity and Othe_2

Shareholders' Equity and Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
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 and nine months ended September 30, 2019 and 2018 . Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) (in thousands) Net unrealized gains (losses) on investment securities available for sale (1) Net unrealized gains (losses) on cash flow hedges (1) Post-retirement unfunded health benefit Total Balance, July 1, 2019 $ 60,586 $ (12,137 ) $ 840 $ 49,289 Other comprehensive income (loss) before reclassifications 25,133 (876 ) (378 ) 23,879 Amounts reclassified from AOCI 2,765 — — 2,765 Net current period other comprehensive income (loss) 27,898 (876 ) (378 ) 26,644 Balance, September 30, 2019 $ 88,484 $ (13,013 ) $ 462 $ 75,933 Balance, July 1, 2018 $ (114,565 ) $ (12,137 ) $ 982 $ (125,720 ) Other comprehensive income (loss) before reclassifications (17,940 ) — (34 ) (17,974 ) Amounts reclassified from AOCI — — (26 ) (26 ) Net current period other comprehensive income (loss) (17,940 ) — (60 ) (18,000 ) Balance, September 30, 2018 $ (132,505 ) $ (12,137 ) $ 922 $ (143,720 ) Balance, January 1, 2019 $ (83,179 ) $ (12,137 ) $ 896 $ (94,420 ) Other comprehensive income (loss) before reclassifications 167,586 (876 ) (378 ) 166,332 Amounts reclassified from AOCI 4,077 — (56 ) 4,021 Net current period other comprehensive income (loss) 171,663 (876 ) (434 ) 170,353 Balance, September 30, 2019 $ 88,484 $ (13,013 ) $ 462 $ 75,933 Balance, December 31, 2017 $ (43,470 ) $ (12,137 ) $ 853 $ (54,754 ) Reclassification from adoption of ASU 2018-02 (7,763 ) — 175 (7,588 ) Cumulative-effect adjustment from adoption of ASU 2016-01 117 — — 117 Other comprehensive income (loss) before reclassifications (82,349 ) — (34 ) (82,383 ) Amounts reclassified from AOCI 960 — (72 ) 888 Net current period other comprehensive income (loss) (81,389 ) — (106 ) (81,495 ) Balance, September 30, 2018 $ (132,505 ) $ (12,137 ) $ 922 $ (143,720 ) (1) In accordance with ASC 740-20-45-11(b), in 2010 and 2011, Synovus recorded a deferred tax asset valuation allowance associated with net unrealized losses not recognized in income directly to other comprehensive income (loss) by applying the portfolio approach which treats derivative instruments and available for sale securities as a single portfolio. For all periods presented, the ending balance in net unrealized gains (losses) on cash flow hedges and investment securities available for sale includes unrealized losses of $12.1 million and $13.3 million , respectively, related to the residual tax effects remaining in OCI due to the previously established deferred tax asset valuation allowance. Under the portfolio approach, these unrealized losses are realized at the time the entire portfolio is sold or disposed.

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Financial Instruments Measured at Fair Value on Recurring Basis	The following tables present all financial instruments measured at fair value on a recurring basis as of September 30, 2019 and December 31, 2018 . September 30, 2019 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities $ — $ 30 $ — $ 30 Collateralized mortgage obligations issued by U.S. Government sponsored enterprises — 1,686 — 1,686 Other mortgage-backed securities 1,799 1,799 State and municipal securities — 485 — 485 Total trading securities $ — $ 4,000 $ — $ 4,000 Investment securities available for sale: U.S. Treasury securities $ 19,782 $ — $ — $ 19,782 U.S. Government agency securities — 36,877 — 36,877 Mortgage-backed securities issued by U.S. Government agencies — 69,681 — 69,681 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 5,065,501 — 5,065,501 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 665,922 — 665,922 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 379,671 — 379,671 State and municipal securities — 2,089 — 2,089 Asset-backed securities — 506,331 — 506,331 Corporate debt securities — 144,317 1,991 146,308 Total investment securities available for sale $ 19,782 $ 6,870,389 $ 1,991 $ 6,892,162 Mortgage loans held for sale — 129,415 — 129,415 Private equity investments — — 11,289 11,289 Mutual funds and mutual funds held in rabbi trusts 31,429 — — 31,429 GGL/SBA loans servicing asset — — 3,350 3,350 Derivative assets — 181,805 — 181,805 Liabilities Trading account liabilities — 1,593 — 1,593 Earnout liability (1) — — 24,810 24,810 Derivative liabilities — 41,350 3,335 44,685 December 31, 2018 (in thousands) Level 1 Level 2 Level 3 Total Assets and Liabilities at Fair Value Assets Trading securities: U.S. Government agency securities $ — $ 44 $ — $ 44 State and municipal securities — 1,064 — 1,064 Other investments 1,128 894 — 2,022 Total trading securities $ 1,128 $ 2,002 $ — $ 3,130 Investment securities available for sale: U.S. Treasury securities $ 122,077 $ — $ — $ 122,077 U.S. Government agency securities — 38,382 — 38,382 Mortgage-backed securities issued by U.S. Government agencies — 97,205 — 97,205 Mortgage-backed securities issued by U.S. Government sponsored enterprises — 2,398,650 — 2,398,650 Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises — 1,188,518 — 1,188,518 Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises — 129,865 — 129,865 Corporate debt securities — 15,150 1,785 16,935 Total investment securities available for sale $ 122,077 $ 3,867,770 $ 1,785 $ 3,991,632 Mortgage loans held for sale — 37,129 — 37,129 Private equity investments — — 11,028 11,028 Mutual funds and mutual funds held in rabbi trusts 16,012 — — 16,012 GGL/SBA loans servicing asset — — 3,729 3,729 Derivative assets — 19,332 — 19,332 Liabilities Earnout liability (1) — — 14,353 14,353 Derivative liabilities — 16,535 1,673 18,208 (1) Earnout liability consists of contingent consideration obligation related to the Global One acquisition.
Schedule of Mortgage Loans Held for Sale and Changes in Fair Value Included in Consolidated Statements of Income	The following table summarizes the difference between the fair value and the UPB of mortgage loans held for sale measured at fair value and the changes in fair value of these loans. An immaterial portion of these changes in fair value was attributable to changes in instrument-specific credit risk. Mortgage Loans Held for Sale (in thousands) As of September 30, 2019 As of December 31, 2018 Fair value $ 129,415 $ 37,129 Unpaid principal balance 126,541 35,848 Fair value less aggregate unpaid principal balance $ 2,874 $ 1,281 Changes in Fair Value Included in Net Income Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Mortgage loans held for sale $ 892 $ (569 ) $ 1,593 $ (414 )
Changes in Level 3 Fair Value Measurements	Three Months Ended September 30, 2019 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Loans Servicing Asset Earnout Visa Derivative Beginning balance, July 1, 2019 $ 2,017 $ 13,341 $ 3,326 $ (14,353 ) $ (1,049 ) Total gains (losses) realized/unrealized: Included in earnings — 1,194 (298 ) (10,457 ) (2,500 ) Unrealized gains (losses) included in OCI (26 ) — — — — Additions — — 322 — — Settlements — (3,246 ) — — 214 Ending balance, September 30, 2019 $ 1,991 $ 11,289 $ 3,350 $ (24,810 ) $ (3,335 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2019 $ — $ 777 $ — $ (10,457 ) $ (2,500 ) Three Months Ended September 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Earnout Visa Derivative Beginning balance, July 1, 2018 $ 1,857 $ 12,678 $ 4,186 $ (11,348 ) $ (5,943 ) Total gains (losses) realized/unrealized: Included in earnings — 434 (561 ) (11,652 ) — Unrealized gains (losses) included in OCI 108 — — — — Additions — — 136 — — Settlements — — — — 3,953 Ending balance, September 30, 2018 $ 1,965 $ 13,112 $ 3,761 $ (23,000 ) $ (1,990 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2018 $ — $ 434 $ — $ (11,652 ) $ — Nine Months Ended September 30, 2019 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Earnout Visa Derivative Beginning balance, January 1, 2019 $ 1,785 $ 11,028 $ 3,729 $ (14,353 ) $ (1,673 ) Total gains (losses) realized/unrealized: Included in earnings — 3,507 (1,091 ) (10,457 ) (2,500 ) Unrealized gains (losses) included in OCI 206 — — — — Additions — — 712 — — Settlements — (3,246 ) — — 838 Ending balance, September 30, 2019 $ 1,991 $ 11,289 $ 3,350 $ (24,810 ) $ (3,335 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains/(losses) relating to assets/liabilities still held at September 30, 2019 $ — $ 3,090 $ — $ (10,457 ) $ (2,500 ) Nine Months Ended September 30, 2018 (in thousands) Investment Securities Available for Sale Private Equity Investments GGL / SBA Earnout Visa Derivative Beginning balance, January 1, 2018 $ 1,935 $ 15,771 $ 4,101 $ (11,348 ) $ (4,330 ) Total (losses) gains realized/unrealized: Included in earnings — (2,659 ) (1,295 ) (11,652 ) (2,328 ) Unrealized gains (losses) included in OCI 30 — — — — Additions — — 955 — — Sales and settlements — — — — 4,668 Ending balance, September 30, 2018 $ 1,965 $ 13,112 $ 3,761 $ (23,000 ) $ (1,990 ) Total net gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held at September 30, 2018 $ — $ (2,659 ) $ — $ (11,652 ) $ (2,328 )
Assets Measured at Fair Value on Non-Recurring Basis	The following table presents assets measured at fair value on a non-recurring basis as of the dates indicated for which there was a fair value adjustment during the period. September 30, 2019 December 31, 2018 (in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Impaired loans (1) $ — $ — $ 10,477 $ 10,477 $ — $ — $ 21,742 $ 21,742 Other loans held for sale — — — — — — 1,494 1,494 Other real estate — — 1,523 1,523 — — 3,827 3,827 Other assets held for sale — — 350 350 — — 1,104 1,104
Fair Value Adjustments Recognized in Earnings for Assets Measured at Fair Value on a Non-recurring Basis	he following table presents fair value adjustments recognized in earnings for the three and nine months ended September 30, 2019 and 2018 for assets measured at fair value on a non-recurring basis still held at period-end. Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Impaired loans (1) $ 4,170 $ 1,223 $ 4,718 $ 4,594 Other real estate 74 61 569 61 Other assets held for sale — — 91 499 (1) Collateral-dependent impaired loans that were written down to fair value during the period.
Carrying and Estimated Fair Values of Financial Instruments Carried on Balance Sheet	he following tables present the carrying and fair values of financial instruments at September 30, 2019 and December 31, 2018 . The fair values represent management’s estimates based on various methodologies and assumptions. See "Part II - Item 8. Financial Statements and Supplementary Data - Note 1 - Summary of Significant Accounting Policies" to the consolidated financial statements of Synovus' 2018 Form 10-K for a description of how fair value measurements are determined. September 30, 2019 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 1,182,470 $ 1,182,470 $ 1,182,470 $ — $ — Trading securities 4,000 4,000 — 4,000 — Investment securities available for sale 6,892,162 6,892,162 19,782 6,870,389 1,991 Mortgage loans held for sale 129,415 129,415 — 129,415 — Private equity investments 11,289 11,289 — — 11,289 Mutual funds and mutual funds held in rabbi trusts 31,429 31,429 31,429 — — Loans, net 36,152,813 36,154,866 — — 36,154,866 GGL/SBA loans servicing asset 3,350 3,350 — — 3,350 Derivative assets 181,805 181,805 — 181,805 — Financial liabilities Non-interest-bearing deposits $ 9,586,148 $ 9,586,148 $ — $ 9,586,148 $ — Non-time interest-bearing deposits 18,313,513 18,313,513 — 18,313,513 — Time deposits 9,533,409 9,578,012 — 9,578,012 — Total deposits $ 37,433,070 $ 37,477,673 $ — $ 37,477,673 $ — Federal funds purchased and securities sold under repurchase agreements 197,419 197,419 197,419 — — Other short-term borrowings 2,233,593 2,233,593 — 2,233,593 — Long-term debt 2,153,600 2,176,073 — 2,176,073 — Earnout liability 24,810 24,810 — — 24,810 Derivative liabilities 44,685 44,685 — 41,350 3,335 December 31, 2018 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets Total cash, cash equivalents, restricted cash, and restricted cash equivalents $ 1,143,564 $ 1,143,564 $ 1,143,564 $ — $ — Trading securities 3,130 3,130 1,128 2,002 — Investment securities available for sale 3,991,632 3,991,632 122,077 3,867,770 1,785 Mortgage loans held for sale 37,129 37,129 — 37,129 — Other loans for sale 1,506 1,506 — — 1,506 Private equity investments 11,028 11,028 — — 11,028 Mutual funds and mutual funds held in rabbi trusts 16,012 16,012 16,012 — — Loans, net 25,696,018 25,438,890 — — 25,438,890 GGL/SBA loans servicing asset 3,729 3,729 — — 3,729 Derivative assets 19,332 19,332 — 19,332 — Financial liabilities Non-interest-bearing deposits $ 7,650,967 $ 7,650,967 $ — $ 7,650,967 $ — Non-time interest-bearing deposits 14,065,959 14,065,959 — 14,065,959 — Time deposits 5,003,396 4,989,570 — 4,989,570 — Total deposits $ 26,720,322 $ 26,706,496 $ — $ 26,706,496 $ — Federal funds purchased and securities sold under repurchase agreements 237,692 237,692 237,692 — — Other short-term borrowings 650,000 650,000 — 650,000 — Long-term debt 1,657,157 1,649,642 — 1,649,642 — Earnout liability 14,353 14,353 — — 14,353 Derivative liabilities 18,208 18,208 — 16,535 1,673

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2019
Summary of Derivative Instruments [Abstract]
Impact of Derivatives on Balance Sheet	The following table reflects the notional amount and fair value of derivative instruments included on the consolidated balance sheets. September 30, 2019 December 31, 2018 Fair Value Fair Value (in thousands) Notional Amount Derivative Assets (1) Derivative Liabilities (2) Notional Amount Derivative Assets (1) Derivative Liabilities (2) Derivatives in cash flow hedging relationships: Interest rate contracts $ 1,000,000 $ 915 $ 2,097 — $ — $ — Total derivatives designated as hedging instruments $ 915 $ 2,097 $ — $ — Derivatives not designated Interest rate contracts (3) $ 6,402,871 $ 178,976 $ 38,702 $ 1,840,288 $ 18,388 $ 15,716 Mortgage derivatives - interest rate lock commitments 125,023 1,914 — 52,420 944 — Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans 161,500 — 407 65,500 — 819 Other contracts (4) 139,167 — 144 69,902 — — Visa derivative — — 3,335 — — 1,673 Total derivatives not designated as hedging instruments $ 180,890 $ 42,588 $ 19,332 $ 18,208 (1) Derivative assets are recorded in other assets on the consolidated balance sheets. (2) Derivative liabilities are recorded in other liabilities on the consolidated balance sheets. (3) Includes interest rate contracts for customer swaps and offsetting positions, net of variation margin payments.
Effect of Fair Value Hedges on Consolidated Statements of Income	The pre-tax effect of changes in fair value from derivative instruments not designated as hedging instruments on the consolidated statements of income for the three and nine months ended September 30, 2019 and 2018 is presented below. Gain (Loss) Recognized in Consolidated Statements of Income Three Months Ended September 30, Nine Months Ended September 30, (in thousands) Location in Consolidated Statements of Income 2019 2018 2019 2018 Derivatives not designated as hedging instruments: Interest rate contracts (1) Capital markets income $ 549 $ 1 $ 640 $ (8 ) Other contracts (2) Capital markets income (144 ) — (144 ) — Mortgage derivatives - interest rate lock commitments Mortgage banking income 22 (427 ) 970 (61 ) Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans Mortgage banking income 642 495 413 376 Visa derivative Other non-interest expense (2,500 ) — (2,500 ) (2,328 ) Total derivatives not designated as hedging instruments $ (1,431 ) $ 69 $ (621 ) $ (2,021 ) (1) Gain (loss) represents net fair value adjustments (including credit-related adjustments and interest settlements on variation margin payments) for customer swaps and offsetting positions. (2) Includes risk participation agreements sold.

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2019
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 and nine months ended September 30, 2019 and 2018 . Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2019 2018 2019 2018 Basic Net Income Per Common Share: Net income available to common shareholders $ 127,435 $ 99,330 $ 397,505 $ 308,559 Weighted average common shares outstanding 152,238 117,241 156,819 118,096 Net income per common share, basic $ 0.84 $ 0.85 $ 2.53 $ 2.61 Diluted Net Income Per Common Share: Net income available to common shareholders $ 127,435 $ 99,330 $ 397,505 $ 308,559 Weighted average common shares outstanding 152,238 117,241 156,819 118,096 Effect of dilutive outstanding equity-based awards, warrants, and earnout payments 1,805 854 1,776 751 Weighted average diluted common shares 154,043 118,095 158,595 118,847 Net income per common share, diluted $ 0.83 $ 0.84 $ 2.51 $ 2.60

Share-based Compensation (Table

Share-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Share-based Compensation, Stock Options, Activity	The following tables summarize the status of Synovus' stock options, restricted share units, market restricted share units, and performance share units as of September 30, 2019 , and activity for the nine months ended September 30, 2019 . Stock Options (in thousands, except per share amounts) Quantity Weighted-Average Exercise Price Per Share Outstanding at January 1, 2019 640 $ 16.93 Assumed 3,230 23.22 Exercised (585 ) 20.10 Outstanding at September 30, 2019 3,285 $ 22.55
Schedule of Nonvested Restricted Stock Units Activity	Restricted Share Units Market Restricted Share Units Performance Share Units (in thousands, except per share amounts) Quantity Weighted-Average Grant Date Fair Value Per Share Quantity Weighted-Average Grant Date Fair Value Per Share Quantity Weighted-Average Grant Date Fair Value Per Share Non-vested at January 1, 2019 526 $ 41.18 144 $ 41.91 248 $ 38.29 Granted 541 36.26 151 36.96 140 37.34 Assumed 136 31.99 — — — — Quantity change by TSR factor — — (19 ) 37.76 — — Dividend equivalents granted 17 36.26 4 36.96 13 37.34 Vested (298 ) 36.78 (58 ) 37.76 (93 ) 26.35 Forfeited (100 ) 36.43 (19 ) 40.94 (31 ) 40.34 Non-vested at September 30, 2019 822 $ 38.49 203 $ 39.80 277 $ 41.56
Share-based Compensation, Allocation of Recognized Period Costs	Total share-based compensation expense recognized for the three and nine months ended September 30, 2019 and 2018 is presented in the following table by its classification within total non-interest expense. Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2019 2018 2019 2018 Salaries and other personnel expense $ 4,992 $ 3,976 $ 16,705 $ 11,725 Merger-related expense — — 4,219 — Other operating expenses 179 208 472 779 Total share-based compensation expense included in non-interest expense $ 5,171 $ 4,184 $ 21,396 $ 12,504

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Lease Assets and Liabilities	The following table presents the lease balances within the consolidated balance sheet as of September 30, 2019 . The difference between the asset and liability balance is primarily the result of lease liabilities that existed prior to the January 1, 2019 adoption of the new accounting guidance for leases. Leases (in thousands) Classification September 30, 2019 Assets Operating Other Assets $ 379,456 Finance Premises and Equipment, net (1) 3,011 Total leased assets $ 382,467 Liabilities Operating Other Liabilities $ 387,898 Finance Other Liabilities 2,767 Total lease liabilities $ 390,665 (1) Finance lease assets are recorded net of accumulated amortization of $671 thousand as of September 30, 2019 .
Schedule of Lease Cost	For the three and nine months ended September 30, 2019 , the components of lease expense were as follows: Lease Cost (in thousands) Classification Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Operating lease cost, net (1) Net occupancy and equipment expense $ 8,199 $ 24,508 Finance lease cost Amortization of leased assets Net occupancy and equipment expense 223 671 Interest on lease liabilities Net occupancy and equipment expense 18 57 Sublease income (2) Net occupancy and equipment expense (157 ) (479 ) Net lease cost $ 8,283 $ 24,757 (1) Excludes variable and short-term lease costs, which are not material. (2) Sublease income excludes rental income from owned properties of $631 thousand and $1.9 million , respectively, for the three and nine months ended September 30, 2019 , which is also included in net occupancy and equipment expenses. Supplemental cash flow information related to the Company's leasing activities for the nine months ended September 30, 2019 are as follows: Other Information (in thousands) Nine Months Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities (1) Operating cash flows from operating leases $ (22,318 ) Operating cash flows from finance leases (57 ) Financing cash flows from finance leases (639 )
Schedule of Lease Term and Discount Rate	The following table presents the weighted average remaining lease term and weighted average discount rates related to Synovus' leases as of September 30, 2019 : Lease Term and Discount Rate Weighted-average remaining lease term (years) Weighted-average discount rate (percentage) Operating leases 21.2 3.54 % Finance leases 4.03 2.42
Maturity of Lease Liabilities, Operating Leases	The following table presents the maturity of Synovus' lease liabilities as of September 30, 2019 : Maturity of Lease Liabilities (in thousands) Operating Leases Finance Leases Total 2019 $ 7,541 $ 193 $ 7,734 2020 30,164 871 31,035 2021 28,975 839 29,814 2022 28,235 465 28,700 2023 26,426 180 26,606 After 2023 443,238 343 443,581 Total lease payments $ 564,579 $ 2,891 $ 567,470 Less: Imputed interest 176,681 124 176,805 Present value of lease liabilities $ 387,898 $ 2,767 $ 390,665
Maturity of Lease Liabilities, Finance Leases	The following table presents the maturity of Synovus' lease liabilities as of September 30, 2019 : Maturity of Lease Liabilities (in thousands) Operating Leases Finance Leases Total 2019 $ 7,541 $ 193 $ 7,734 2020 30,164 871 31,035 2021 28,975 839 29,814 2022 28,235 465 28,700 2023 26,426 180 26,606 After 2023 443,238 343 443,581 Total lease payments $ 564,579 $ 2,891 $ 567,470 Less: Imputed interest 176,681 124 176,805 Present value of lease liabilities $ 387,898 $ 2,767 $ 390,665

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Loan Commitments and Letters of Credit	(in thousands) September 30, 2019 December 31, 2018 Letters of credit* $ 203,224 $ 157,675 Commitments to fund commercial and industrial loans 6,702,472 5,527,017 Commitments to fund commercial real estate, construction, and land development loans 2,734,852 2,034,223 Commitments under home equity lines of credit 1,464,720 1,258,657 Unused credit card lines 899,379 775,003 Other loan commitments 487,698 400,983 Total unfunded lending commitments and letters of credit $ 12,492,345 $ 10,153,558 Investments in low income housing tax credit partnerships: Carrying amount included in other assets $ 108,025 $ 83,736 Amount of future funding commitments included in carrying amount 49,179 47,123 Short-term construction loans and letter of credit commitments 259 1,585 Funded portion of short-term loans and letters of credit 2,822 5,595 * Represent the contractual amount net of risk participations of approximately $33 million and $46 million at September 30, 2019 and December 31, 2018 , respectively.

Basis of Presentation (Details)

Basis of Presentation (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)automatic_teller_machinebranch	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)
Basis Of Presentation [Line Items]
Number of branches | branch	298
Number of ATMs | automatic_teller_machine	386
Operating lease, right-of-use asset	$ 379,456	$ 381,100
Operating lease, liability	387,898	391,000
Adjustment from adoption of ASU			$ 4,270
Deferred gains on sale-leaseback transactions		3,900
Assets finance	$ 3,011
Premises and Equipment
Basis Of Presentation [Line Items]
Assets finance		4,000
Retained Earnings
Basis Of Presentation [Line Items]
Adjustment from adoption of ASU			$ 4,270
Accounting Standards Update 2016-02 | Retained Earnings
Basis Of Presentation [Line Items]
Adjustment from adoption of ASU		$ 4,300
Accounting Standards Update 2016-13 | Minimum
Basis Of Presentation [Line Items]
Increase in allowance for credit loss, percentage	40.00%
Accounting Standards Update 2016-13 | Maximum
Basis Of Presentation [Line Items]
Increase in allowance for credit loss, percentage	60.00%

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) $ / shares in Units, $ in Thousands	Jan. 01, 2019USD ($)branchshares	Oct. 01, 2016	Sep. 30, 2019USD ($)shares	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)shares	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)$ / sharesshares
Business Acquisition [Line Items]
Closing stock price (in dollars per share) | $ / shares							$ 31.99
Goodwill			$ 487,865		$ 487,865		$ 57,315
Merger-related expense			353	$ 6,684	57,493	$ 6,684
Earnout liability adjustments			$ (10,457)	(11,652)	$ (10,457)	(11,652)
Common stock, shares issued (in shares) | shares			166,201,048		166,201,048		143,300,449
Common stock			$ 166,201		$ 166,201		$ 143,300
FCB Financial Holdings, Inc.
Business Acquisition [Line Items]
Consideration transferred	$ 1,626,278
Identifiable assets acquired	12,384,645
Loans	9,292,991
Deposits	$ 10,930,724
Service banking centers acquired | branch	51
Cash equivalents	$ 3,500
Stock issued in acquisitions (in shares) | shares	49,500,000
Synovus common stock issued and reissued from treasury	$ 1,582,133
Cash paid	601
Converted options and restricted share units, fair value	41,500
Share based awards allocated to purchase price	37,300
Warrants converted fair value	6,700
Goodwill	$ 430,550
Merger-related expense			353		57,493
Increase in loans					5,200
Estimated useful life	10 years
Core deposits decrease					10,800
Core deposit intangible	$ 57,400
FCB Financial Holdings, Inc. | Executives
Business Acquisition [Line Items]
Merger-related expense					21,800
FCB Financial Holdings, Inc. | FCB Financial Holdings, Inc.
Business Acquisition [Line Items]
Merger exchange ratio	1.055
Other equity compensation, non-vested shares outstanding, fair value	$ 7,500
Merger-related expense					19,600
Global One
Business Acquisition [Line Items]
Earnout liability adjustments			10,500	$ 11,700	10,500	$ 11,700
Common stock, shares issued (in shares) | shares							199,000
Common stock							$ 7,400
Earnout payments, cash							$ 1,200
Earnout liability			$ 24,800		$ 24,800
Global One | Minimum
Business Acquisition [Line Items]
Period of additional annual payments		3 years
Global One | Maximum
Business Acquisition [Line Items]
Period of additional annual payments		5 years

Acquisitions (Assets Acquired a

Acquisitions (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 01, 2019	Sep. 30, 2019	Dec. 31, 2018
Liabilities
Preliminary goodwill		$ 487,865	$ 57,315
Closing stock price (in dollars per share)			$ 31.99
FCB Financial Holdings, Inc.
Business Acquisition [Line Items]
Synovus common stock issued and reissued from treasury attributed to purchase price	$ 1,582,133
Cash payments to FCB stockholders attributed to purchase price	173
Fair value of exchanged employee and director equity awards and FCB warrants attributed to purchase price	43,972
Total purchase price	1,626,278
Assets
Cash and cash equivalents	201,689
Investment securities available for sale	2,301,001
Loans	9,292,991
Cash surrender value of bank-owned life insurance	216,848
Premises and equipment	45,412
Core deposit intangible	57,400
Other assets	269,304
Total Assets	12,384,645
Liabilities
Deposits	10,930,724
Federal funds purchased and securities sold under repurchase agreements	29,139
Long-term debt	153,236
Other liabilities	75,818
Total Liabilities	11,188,917
Fair value of net identifiable assets acquired	1,195,728
Preliminary goodwill	430,550
Cash paid	$ 601

Acquisitions (Pro Forma) (Detai

Acquisitions (Pro Forma) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Actual, Net interest income	$ 402,097	$ 291,619	$ 1,196,535	$ 850,480
Actual, Non-interest income	88,760	71,668	257,945	212,101
Actual, Income before income taxes	186,985	128,008	558,383	403,502
Actual, Net income available to common shareholders	127,435	99,330	397,505	308,559
Merger-related expense	353	$ 6,684	57,493	6,684
FCB Financial Holdings, Inc.
Business Acquisition [Line Items]
Actual, Net interest income			1,196,535
Pro Forma, Net interest income				1,162,146
Actual, Non-interest income			257,945
Pro Forma, Non-interest income				236,042
Actual, Income before income taxes			558,383
Pro Forma, Income before income taxes				604,101
Actual, Net income available to common shareholders			397,505
Pro Forma, Net income available to common shareholders				$ 463,984
Merger-related expense	$ 353		$ 57,493

Acquisitions (Acquisition Relat

Acquisitions (Acquisition Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Total merger-related expense	$ 353	$ 6,684	$ 57,493	$ 6,684
FCB Financial Holdings, Inc.
Business Acquisition [Line Items]
Total merger-related expense	353		57,493
FCB Financial Holdings, Inc. | Employment compensation agreements, severance, and other employee benefit costs
Business Acquisition [Line Items]
Total merger-related expense	0		34,762
FCB Financial Holdings, Inc. | Professional fees
Business Acquisition [Line Items]
Total merger-related expense	131		17,122
FCB Financial Holdings, Inc. | All other expense
Business Acquisition [Line Items]
Total merger-related expense	$ 222		$ 5,609

Investment Securities Availab_3

Investment Securities Available for Sale (Summary of Available for Sale Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 6,754,781	$ 4,085,913
Gross Unrealized Gains	141,953	6,274
Gross Unrealized Losses	(4,572)	(100,555)
Fair Value	6,892,162	3,991,632
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	19,782	123,436
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(1,359)
Fair Value	19,782	122,077
U.S. Government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	35,497	38,021
Gross Unrealized Gains	1,388	361
Gross Unrealized Losses	(8)	0
Fair Value	36,877	38,382
Mortgage-backed securities issued by U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	69,141	100,060
Gross Unrealized Gains	730	172
Gross Unrealized Losses	(190)	(3,027)
Fair Value	69,681	97,205
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,970,420	2,460,498
Gross Unrealized Gains	99,289	1,981
Gross Unrealized Losses	(4,208)	(63,829)
Fair Value	5,065,501	2,398,650
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	656,311	1,215,406
Gross Unrealized Gains	9,612	2,997
Gross Unrealized Losses	(1)	(29,885)
Fair Value	665,922	1,188,518
Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	360,065	131,492
Gross Unrealized Gains	19,606	613
Gross Unrealized Losses	0	(2,240)
Fair Value	379,671	129,865
State and municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,079
Gross Unrealized Gains	10
Gross Unrealized Losses	0
Fair Value	2,089
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	497,045
Gross Unrealized Gains	9,442
Gross Unrealized Losses	(156)
Fair Value	506,331
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	144,441	17,000
Gross Unrealized Gains	1,876	150
Gross Unrealized Losses	(9)	(215)
Fair Value	$ 146,308	$ 16,935

Investment Securities Availab_4

Investment Securities Available for Sale (Narrative) (Details) $ in Millions	Sep. 30, 2019USD ($)securities	Dec. 31, 2018USD ($)securities
Financing Receivable, Impaired [Line Items]
Investment securities in a loss position for less than twelve months	27	9
Investment securities in a loss position for twelve months or longer	8	123
Collateral Pledged
Financing Receivable, Impaired [Line Items]
Pledged to secure deposits | $	$ 1,460	$ 1,560

Investment Securities Availab_5

Investment Securities Available for Sale (Schedule of Gross Unrealized Losses on Investment Securities and Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 940,244	$ 230,520
Less than 12 Months, Gross Unrealized Losses	(2,449)	(2,118)
12 Months or Longer, Fair Value	199,773	3,259,401
12 Months or Longer, Gross Unrealized Losses	(2,123)	(98,437)
Total, Fair Value	1,140,017	3,489,921
Total, Gross Unrealized Losses	(4,572)	(100,555)
U.S. Government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	1,046
Less than 12 Months, Gross Unrealized Losses	(8)
12 Months or Longer, Fair Value	0
12 Months or Longer, Gross Unrealized Losses	0
Total, Fair Value	1,046
Total, Gross Unrealized Losses	(8)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value		39,031
Less than 12 Months, Gross Unrealized Losses		(118)
12 Months or Longer, Fair Value		63,570
12 Months or Longer, Gross Unrealized Losses		(1,241)
Total, Fair Value		102,601
Total, Gross Unrealized Losses		(1,359)
Mortgage-backed securities issued by U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	3,381	2,059
Less than 12 Months, Gross Unrealized Losses	(4)	(2)
12 Months or Longer, Fair Value	11,333	79,736
12 Months or Longer, Gross Unrealized Losses	(186)	(3,025)
Total, Fair Value	14,714	81,795
Total, Gross Unrealized Losses	(190)	(3,027)
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	869,064	130,432
Less than 12 Months, Gross Unrealized Losses	(2,271)	(700)
12 Months or Longer, Fair Value	188,440	2,105,358
12 Months or Longer, Gross Unrealized Losses	(1,937)	(63,129)
Total, Fair Value	1,057,504	2,235,790
Total, Gross Unrealized Losses	(4,208)	(63,829)
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	527	0
Less than 12 Months, Gross Unrealized Losses	(1)	0
12 Months or Longer, Fair Value	0	964,732
12 Months or Longer, Gross Unrealized Losses	0	(29,885)
Total, Fair Value	527	964,732
Total, Gross Unrealized Losses	(1)	(29,885)
Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value		58,998
Less than 12 Months, Gross Unrealized Losses		(1,298)
12 Months or Longer, Fair Value		44,220
12 Months or Longer, Gross Unrealized Losses		(942)
Total, Fair Value		103,218
Total, Gross Unrealized Losses		(2,240)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	64,235
Less than 12 Months, Gross Unrealized Losses	(156)
12 Months or Longer, Fair Value	0
12 Months or Longer, Gross Unrealized Losses	0
Total, Fair Value	64,235
Total, Gross Unrealized Losses	(156)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	1,991	0
Less than 12 Months, Gross Unrealized Losses	(9)	0
12 Months or Longer, Fair Value	0	1,785
12 Months or Longer, Gross Unrealized Losses	0	(215)
Total, Fair Value	1,991	1,785
Total, Gross Unrealized Losses	$ (9)	$ (215)

Investment Securities Availab_6

Investment Securities Available for Sale (Amortized Cost and Estimated Fair Value by Contractual Maturity of Investment Securities Available for Sale) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Amortized Cost
Within One year, Amortized Cost	$ 44,647
1 to 5 Years, Amortized Cost	119,050
5 to 10 Years, Amortized Cost	827,074
More Than 10 years, Amortized Cost	5,764,010
Amortized Cost	6,754,781	$ 4,085,913
Fair Value
Within One Year, Fair Value	44,795
1 to 5 Years, Fair Value	120,593
5 to 10 Years, Fair Value	854,288
More Than 10 years, Fair Value	5,872,486
Total, Fair Value	6,892,162	3,991,632
U.S. Treasury securities
Amortized Cost
Within One year, Amortized Cost	19,782
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	0
More Than 10 years, Amortized Cost	0
Amortized Cost	19,782	123,436
Fair Value
Within One Year, Fair Value	19,782
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	0
More Than 10 years, Fair Value	0
Total, Fair Value	19,782	122,077
U.S. Government agency securities
Amortized Cost
Within One year, Amortized Cost	585
1 to 5 Years, Amortized Cost	4,926
5 to 10 Years, Amortized Cost	29,986
More Than 10 years, Amortized Cost	0
Amortized Cost	35,497	38,021
Fair Value
Within One Year, Fair Value	592
1 to 5 Years, Fair Value	4,954
5 to 10 Years, Fair Value	31,331
More Than 10 years, Fair Value	0
Total, Fair Value	36,877	38,382
Mortgage-backed securities issued by U.S. Government agencies
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	821
5 to 10 Years, Amortized Cost	2,037
More Than 10 years, Amortized Cost	66,283
Amortized Cost	69,141	100,060
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	825
5 to 10 Years, Fair Value	2,077
More Than 10 years, Fair Value	66,779
Total, Fair Value	69,681	97,205
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	5,807
5 to 10 Years, Amortized Cost	132,548
More Than 10 years, Amortized Cost	4,832,065
Amortized Cost	4,970,420	2,460,498
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	5,811
5 to 10 Years, Fair Value	135,778
More Than 10 years, Fair Value	4,923,912
Total, Fair Value	5,065,501	2,398,650
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	345
More Than 10 years, Amortized Cost	655,966
Amortized Cost	656,311
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	353
More Than 10 years, Fair Value	665,569
Total, Fair Value	665,922
Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	22,632
5 to 10 Years, Amortized Cost	250,321
More Than 10 years, Amortized Cost	87,112
Amortized Cost	360,065	131,492
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	23,152
5 to 10 Years, Fair Value	264,048
More Than 10 years, Fair Value	92,471
Total, Fair Value	379,671	129,865
State and municipal securities
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	1,066
More Than 10 years, Amortized Cost	1,013
Amortized Cost	2,079
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	1,069
More Than 10 years, Fair Value	1,020
Total, Fair Value	2,089
Asset-backed securities
Amortized Cost
Within One year, Amortized Cost	0
1 to 5 Years, Amortized Cost	0
5 to 10 Years, Amortized Cost	377,474
More Than 10 years, Amortized Cost	119,571
Amortized Cost	497,045
Fair Value
Within One Year, Fair Value	0
1 to 5 Years, Fair Value	0
5 to 10 Years, Fair Value	385,587
More Than 10 years, Fair Value	120,744
Total, Fair Value	506,331
Corporate debt securities
Amortized Cost
Within One year, Amortized Cost	24,280
1 to 5 Years, Amortized Cost	84,864
5 to 10 Years, Amortized Cost	33,297
More Than 10 years, Amortized Cost	2,000
Amortized Cost	144,441	17,000
Fair Value
Within One Year, Fair Value	24,421
1 to 5 Years, Fair Value	85,851
5 to 10 Years, Fair Value	34,045
More Than 10 years, Fair Value	1,991
Total, Fair Value	$ 146,308	$ 16,935

Investment Securities Availab_7

Investment Securities Available for Sale (Summary of Sales Transactions in the Investment Securities Available for Sale Portfolio) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018
Investments [Abstract]
Proceeds from sales of investment securities available for sale	$ 709,464	$ 0	$ 2,002,137	[1]	$ 35,066
Gross realized gains on sales	140	0	9,270		0
Gross realized losses on sales	(3,871)	0	(14,772)		(1,296)
Investment securities losses, net	$ (3,731)	$ 0	$ (5,502)	[1]	$ (1,296)
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses (Schedule of Current, Accruing Past Due and Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	$ 36,417,826		$ 25,946,573
Non-accrual	107,103		106,733
Total loans	28,348,323		25,970,716
Deferred fees and costs, net	(22,700)		(24,100)	$ (23,800)
FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	5,000
ASC 310-30 Loans	6,203,529	$ 1,066,689
Discount/Premium	(112,841)
Total loans	8,092,164
Loans		$ 9,292,991
Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	74,134		78,266
Total loans	13,674,030		12,781,206
Total commercial and industrial | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	5,000
ASC 310-30 Loans	2,034,521
Discount/Premium	(18,592)
Total loans	2,771,242
Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	64,912		69,295
Total loans	8,085,060		7,449,698
Total commercial and industrial | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	5,000
ASC 310-30 Loans	1,120,805
Discount/Premium	(13,646)
Total loans	1,770,821
Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	9,222		8,971
Total loans	5,588,970		5,331,508
Total commercial and industrial | Owner-occupied | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	913,716
Discount/Premium	(4,946)
Total loans	1,000,421
Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	5,628		7,715
Total loans	7,106,317		6,564,491
Total commercial real estate | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	2,109,969
Discount/Premium	(18,232)
Total loans	3,179,716
Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	378		2,381
Total loans	6,058,359		5,560,951
Total commercial real estate | Investment properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	1,973,932
Discount/Premium	(15,191)
Total loans	2,876,404
Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	2,218		2,381
Total loans	640,124		679,870
Total commercial real estate | 1-4 family properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	43,208
Discount/Premium	(242)
Total loans	98,640
Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	3,032		2,953
Total loans	407,834		323,670
Total commercial real estate | Land and development | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	92,829
Discount/Premium	(2,799)
Total loans	204,672
Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	27,341		20,752
Total loans	7,567,976		6,625,019
Total consumer | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	2,059,039
Discount/Premium	(76,017)
Total loans	2,141,206
Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	10,015		4,949
Total loans	3,398,720		2,934,235
Total consumer | Consumer mortgages | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	2,045,872
Discount/Premium	(70,969)
Total loans	2,072,010
Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	12,590		12,114
Total loans	1,616,063		1,515,796
Total consumer | Home equity lines | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	2,377
Discount/Premium	(4,114)
Total loans	59,029
Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0		0
Total loans	267,874		258,245
Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	4,736		3,689
Total loans	2,285,319		1,916,743
Total consumer | Other consumer loans | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Non-accrual	0
ASC 310-30 Loans	10,790
Discount/Premium	(934)
Total loans	10,167
Current
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	28,168,942		25,807,056
Current | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,995,627
Current | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	13,575,225		12,689,324
Current | Total commercial and industrial | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	749,665
Current | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	8,003,162		7,372,301
Current | Total commercial and industrial | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	658,014
Current | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	5,572,063		5,317,023
Current | Total commercial and industrial | Owner-occupied | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	91,651
Current | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,091,000		6,551,850
Current | Total commercial real estate | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,087,979
Current | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,055,365		5,557,224
Current | Total commercial real estate | Investment properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	917,663
Current | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	634,144		674,648
Current | Total commercial real estate | 1-4 family properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	55,674
Current | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	401,491		319,978
Current | Total commercial real estate | Land and development | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	114,642
Current | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,502,717		6,565,882
Current | Total consumer | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	157,983
Current | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,382,636		2,922,136
Current | Total consumer | Consumer mortgages | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	97,107
Current | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,596,081		1,496,562
Current | Total consumer | Home equity lines | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	60,565
Current | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	262,724		252,832
Current | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,261,276		1,894,352
Current | Total consumer | Other consumer loans | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	311
Accruing 30-89 Days Past Due
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	64,625		53,129
Accruing 30-89 Days Past Due | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	849
Accruing 30-89 Days Past Due | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	22,065		13,421
Accruing 30-89 Days Past Due | Total commercial and industrial | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	648
Accruing 30-89 Days Past Due | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	15,997		7,988
Accruing 30-89 Days Past Due | Total commercial and industrial | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	648
Accruing 30-89 Days Past Due | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,068		5,433
Accruing 30-89 Days Past Due | Total commercial and industrial | Owner-occupied | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 30-89 Days Past Due | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,953		4,796
Accruing 30-89 Days Past Due | Total commercial real estate | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 30-89 Days Past Due | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,714		1,312
Accruing 30-89 Days Past Due | Total commercial real estate | Investment properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 30-89 Days Past Due | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,928		2,745
Accruing 30-89 Days Past Due | Total commercial real estate | 1-4 family properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 30-89 Days Past Due | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,311		739
Accruing 30-89 Days Past Due | Total commercial real estate | Land and development | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 30-89 Days Past Due | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	34,607		34,912
Accruing 30-89 Days Past Due | Total consumer | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	201
Accruing 30-89 Days Past Due | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,069		7,150
Accruing 30-89 Days Past Due | Total consumer | Consumer mortgages | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 30-89 Days Past Due | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,354		7,092
Accruing 30-89 Days Past Due | Total consumer | Home equity lines | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	201
Accruing 30-89 Days Past Due | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,657		3,066
Accruing 30-89 Days Past Due | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	18,527		17,604
Accruing 30-89 Days Past Due | Total consumer | Other consumer loans | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,653		3,798
Accruing 90 Days or Greater Past Due | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,606		195
Accruing 90 Days or Greater Past Due | Total commercial and industrial | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	989		114
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,617		81
Accruing 90 Days or Greater Past Due | Total commercial and industrial | Owner-occupied | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	1,736		130
Accruing 90 Days or Greater Past Due | Total commercial real estate | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	902		34
Accruing 90 Days or Greater Past Due | Total commercial real estate | Investment properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	834		96
Accruing 90 Days or Greater Past Due | Total commercial real estate | 1-4 family properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0		0
Accruing 90 Days or Greater Past Due | Total commercial real estate | Land and development | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,311		3,473
Accruing 90 Days or Greater Past Due | Total consumer | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0		0
Accruing 90 Days or Greater Past Due | Total consumer | Consumer mortgages | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	38		28
Accruing 90 Days or Greater Past Due | Total consumer | Home equity lines | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Accruing 90 Days or Greater Past Due | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,493		2,347
Accruing 90 Days or Greater Past Due | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	780		1,098
Accruing 90 Days or Greater Past Due | Total consumer | Other consumer loans | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	72,278		56,927
Total Accruing Past Due | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	849
Total Accruing Past Due | Total commercial and industrial
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	24,671		13,616
Total Accruing Past Due | Total commercial and industrial | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	648
Total Accruing Past Due | Total commercial and industrial | Commercial, financial and agricultural
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	16,986		8,102
Total Accruing Past Due | Total commercial and industrial | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	648
Total Accruing Past Due | Total commercial and industrial | Owner-occupied
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,685		5,514
Total Accruing Past Due | Total commercial and industrial | Owner-occupied | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due | Total commercial real estate
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	9,689		4,926
Total Accruing Past Due | Total commercial real estate | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due | Total commercial real estate | Investment properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	2,616		1,346
Total Accruing Past Due | Total commercial real estate | Investment properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due | Total commercial real estate | 1-4 family properties
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,762		2,841
Total Accruing Past Due | Total commercial real estate | 1-4 family properties | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due | Total commercial real estate | Land and development
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	3,311		739
Total Accruing Past Due | Total commercial real estate | Land and development | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due | Total consumer
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	37,918		38,385
Total Accruing Past Due | Total consumer | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	201
Total Accruing Past Due | Total consumer | Consumer mortgages
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	6,069		7,150
Total Accruing Past Due | Total consumer | Consumer mortgages | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	0
Total Accruing Past Due | Total consumer | Home equity lines
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	7,392		7,120
Total Accruing Past Due | Total consumer | Home equity lines | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	201
Total Accruing Past Due | Total consumer | Credit cards
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	5,150		5,413
Total Accruing Past Due | Total consumer | Other consumer loans
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	19,307		$ 18,702
Total Accruing Past Due | Total consumer | Other consumer loans | FCB Financial Holdings, Inc.
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Loans and leases receivables	$ 0

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses (Narrative) (Details)	3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Sep. 30, 2019USD ($)contract		Sep. 30, 2018USD ($)contract	Dec. 31, 2018USD ($)	Jan. 01, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	$ 11,770,000,000		$ 11,770,000,000			$ 8,400,000,000
Non-accrual status	69,400,000		69,400,000			51,300,000
Recorded Investment	14,621,000	$ 11,795,000	31,352,000		$ 37,160,000
Provision for loan losses	27,562,000	$ 14,982,000	63,250,000	[1]	$ 39,548,000
Commitments to land additional funds to TDRs	$ 0		$ 0			0
Troubled Debt Restructuring That Subsequently Defaults
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of contracts | contract	3	0	4		8
Recorded Investment	$ 321,000	$ 0	$ 326,000		$ 10,500,000
FCB Financial Holdings, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired at fair value							$ 9,290,000,000
Loans acquired at fair value, discount							164,200,000
Contractual required payments							2,450,000,000
Contractual required payments at fair value							2,150,000,000
Cash flows expected not to be collected							$ 39,500,000
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loan substandard period (in days)			90 days
Loss And Charged Off
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail loans downgraded to loss (in days)			120 days
Accruing TDRs With Modifications And Renewals Completed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accruing troubled debt restructuring	$ 130,000,000		$ 130,000,000			115,600,000
Provision for loan losses			5,800,000			$ 6,100,000
Accruing TDRs With Modifications And Renewals Completed | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial-type impaired loans			$ 1,000,000
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses (Loan Portfolio Credit Exposure) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 28,348,323		$ 25,970,716
Accrual substandard loans	249,800		172,300
Deferred fees and costs, net	(22,700)		(24,100)	$ (23,800)
FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 8,092,164
Loans		$ 9,292,991
Maximum
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for loan losses, percent of loan amount	50.00%
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 27,865,432		25,458,715
Pass | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,944,752
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	157,846		232,952
Special Mention | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	106,730
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	313,721		274,918
Substandard | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	40,682
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,280		1,472
Doubtful | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,044		2,659
Loss | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,674,030		12,781,206
Total commercial and industrial | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,771,242
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,085,060		7,449,698
Total commercial and industrial | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,770,821
Total commercial and industrial | Owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,588,970		5,331,508
Total commercial and industrial | Owner-occupied | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,000,421
Total commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,309,362		12,402,990
Total commercial and industrial | Pass | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,672,401
Total commercial and industrial | Pass | Commercial, financial and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,816,114		7,190,517
Total commercial and industrial | Pass | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,701,326
Total commercial and industrial | Pass | Owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,493,248		5,212,473
Total commercial and industrial | Pass | Owner-occupied | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	971,075
Total commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	123,861		173,226
Total commercial and industrial | Special Mention | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	72,654
Total commercial and industrial | Special Mention | Commercial, financial and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	104,214		118,188
Total commercial and industrial | Special Mention | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	48,615
Total commercial and industrial | Special Mention | Owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	19,647		55,038
Total commercial and industrial | Special Mention | Owner-occupied | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	24,039
Total commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	232,921		203,790
Total commercial and industrial | Substandard | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	26,187
Total commercial and industrial | Substandard | Commercial, financial and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	156,919		140,218
Total commercial and industrial | Substandard | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	20,880
Total commercial and industrial | Substandard | Owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	76,002		63,572
Total commercial and industrial | Substandard | Owner-occupied | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,307
Total commercial and industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,886		1,200
Total commercial and industrial | Doubtful | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial and industrial | Doubtful | Commercial, financial and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,813		775
Total commercial and industrial | Doubtful | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial and industrial | Doubtful | Owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	73		425
Total commercial and industrial | Doubtful | Owner-occupied | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial and industrial | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial and industrial | Loss | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial and industrial | Loss | Commercial, financial and agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial and industrial | Loss | Commercial, financial and agricultural | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial and industrial | Loss | Owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial and industrial | Loss | Owner-occupied | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,106,317		6,564,491
Total commercial real estate | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,179,716
Total commercial real estate | Investment properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,058,359		5,560,951
Total commercial real estate | Investment properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,876,404
Total commercial real estate | 1-4 family properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	640,124		679,870
Total commercial real estate | 1-4 family properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	98,640
Total commercial real estate | Land and development
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	407,834		323,670
Total commercial real estate | Land and development | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	204,672
Total commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,021,910		6,458,891
Total commercial real estate | Pass | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,139,093
Total commercial real estate | Pass | Investment properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,007,116		5,497,344
Total commercial real estate | Pass | Investment properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,842,820
Total commercial real estate | Pass | 1-4 family properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	628,631		663,692
Total commercial real estate | Pass | 1-4 family properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	98,316
Total commercial real estate | Pass | Land and development
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	386,163		297,855
Total commercial real estate | Pass | Land and development | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	197,957
Total commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	33,985		59,726
Total commercial real estate | Special Mention | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	34,076
Total commercial real estate | Special Mention | Investment properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	20,549		40,516
Total commercial real estate | Special Mention | Investment properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	27,488
Total commercial real estate | Special Mention | 1-4 family properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,558		6,424
Total commercial real estate | Special Mention | 1-4 family properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Special Mention | Land and development
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	9,878		12,786
Total commercial real estate | Special Mention | Land and development | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,588
Total commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	50,422		45,874
Total commercial real estate | Substandard | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,547
Total commercial real estate | Substandard | Investment properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	30,694		23,091
Total commercial real estate | Substandard | Investment properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,096
Total commercial real estate | Substandard | 1-4 family properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,935		9,754
Total commercial real estate | Substandard | 1-4 family properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	324
Total commercial real estate | Substandard | Land and development
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,793		13,029
Total commercial real estate | Substandard | Land and development | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	127
Total commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Doubtful | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Doubtful | Investment properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Doubtful | Investment properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Doubtful | 1-4 family properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Doubtful | 1-4 family properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Doubtful | Land and development
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Doubtful | Land and development | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Loss | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Loss | Investment properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Loss | Investment properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Loss | 1-4 family properties
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Loss | 1-4 family properties | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total commercial real estate | Loss | Land and development
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total commercial real estate | Loss | Land and development | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,567,976		6,625,019
Total consumer | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,141,206
Total consumer | Consumer mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,398,720		2,934,235
Total consumer | Consumer mortgages | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,072,010
Total consumer | Home equity lines
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,616,063		1,515,796
Total consumer | Home equity lines | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	59,029
Total consumer | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	267,874		258,245
Total consumer | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,285,319		1,916,743
Total consumer | Other consumer loans | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	10,167
Total consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,534,160		6,596,834
Total consumer | Pass | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,133,258
Total consumer | Pass | Consumer mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,388,412		2,926,712
Total consumer | Pass | Consumer mortgages | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,064,108
Total consumer | Pass | Home equity lines
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,600,061		1,501,316
Total consumer | Pass | Home equity lines | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	58,983
Total consumer | Pass | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	265,382		255,904
Total consumer | Pass | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,280,305		1,912,902
Total consumer | Pass | Other consumer loans | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	10,167
Total consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Special Mention | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Special Mention | Consumer mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Special Mention | Consumer mortgages | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Special Mention | Home equity lines
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Special Mention | Home equity lines | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Special Mention | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Special Mention | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Special Mention | Other consumer loans | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	30,378		25,254
Total consumer | Substandard | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,948
Total consumer | Substandard | Consumer mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	9,859		7,425
Total consumer | Substandard | Consumer mortgages | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	7,902
Total consumer | Substandard | Home equity lines
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	14,683		13,130
Total consumer | Substandard | Home equity lines | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	46
Total consumer | Substandard | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	822		858
Total consumer | Substandard | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,014		3,841
Total consumer | Substandard | Other consumer loans | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	394		272
Total consumer | Doubtful | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Doubtful | Consumer mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	373		98
Total consumer | Doubtful | Consumer mortgages | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Doubtful | Home equity lines
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	21		174
Total consumer | Doubtful | Home equity lines | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Doubtful | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Doubtful | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		0
Total consumer | Doubtful | Other consumer loans | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,044		2,659
Total consumer | Loss | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Loss | Consumer mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	76		0
Total consumer | Loss | Consumer mortgages | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Loss | Home equity lines
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,298		1,176
Total consumer | Loss | Home equity lines | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0
Total consumer | Loss | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,670		1,483
Total consumer | Loss | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	0		$ 0
Total consumer | Loss | Other consumer loans | FCB Financial Holdings, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 0

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses (Acuired Loan Portfolio) (Details) - FCB Financial Holdings, Inc. - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Business Acquisition [Line Items]
Contractually required principal and interest at acquisition		$ 8,377,942
Non-accretable difference (expected losses and foregone interest)		(163,147)
Cash flows expected to be collected at acquisition		8,214,795
Accretable yield	$ (6,203,529)	(1,066,689)
Basis in ASC 310-30 loans at acquisition		$ 7,148,106

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses (Changes in Accretable Difference) (Details) - FCB Financial Holdings, Inc. $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 0
Additions	1,066,689
Transfers from non-accretable difference to accretable yield	13,516
Accretion	(273,231)
Changes in expected cash flows not affecting non-accretable differences	24,929
Ending balance	$ 831,903

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses (Schedule of Allowances for Loan Losses and Recorded Investment in Loans) (Details) - USD ($)	3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018	Dec. 31, 2018
Allowance for loan losses:
Beginning balance, allowance	$ 257,376,000	$ 251,725,000	$ 250,555,000		$ 249,268,000	$ 249,268,000
Charge-offs	(24,726,000)	(18,596,000)	(62,290,000)		(54,723,000)
Recoveries	4,801,000	3,339,000	13,498,000		17,357,000
Provision for (reversal of) loan losses	27,562,000	14,982,000	63,250,000	[1]	39,548,000
Ending balance, allowance	265,013,000	251,450,000	265,013,000		251,450,000	250,555,000
Ending balance: individually evaluated for impairment, allowance	16,204,000	13,395,000	16,204,000		13,395,000
Ending balance: collectively evaluated for impairment, allowance	248,809,000	238,055,000	248,809,000		238,055,000
Ending balance: total loans	36,440,487,000	25,600,897,000	36,440,487,000		25,600,897,000
Ending balance: individually evaluated for impairment, loans	199,416,000	169,622,000	199,416,000		169,622,000
Ending balance: collectively evaluated for impairment, loans	30,143,376,000	25,431,275,000	30,143,376,000		25,431,275,000
Ending balance: acquired loans accounted for under ASC 310-30	6,097,695,000		6,097,695,000
Allowance for purchased credit-impaired loans	0	0	0		0
Deferred fees and costs, net	(22,700,000)	(23,800,000)	(22,700,000)		(23,800,000)	(24,100,000)
Acquired collectively evaluated for impairment loan discount	7,000,000		7,000,000
Acquired loans under 310-30 loan discount	105,800,000		105,800,000
Purchased credit-impaired loans		0			0
Commercial & Industrial
Allowance for loan losses:
Beginning balance, allowance	138,004,000	130,335,000	133,123,000		126,803,000	126,803,000
Charge-offs	(15,425,000)	(13,526,000)	(39,558,000)		(37,312,000)
Recoveries	2,276,000	1,091,000	6,087,000		5,086,000
Provision for (reversal of) loan losses	17,156,000	11,417,000	42,359,000		34,740,000
Ending balance, allowance	142,011,000	129,317,000	142,011,000		129,317,000	133,123,000
Ending balance: individually evaluated for impairment, allowance	14,139,000	9,108,000	14,139,000		9,108,000
Ending balance: collectively evaluated for impairment, allowance	127,872,000	120,209,000	127,872,000		120,209,000
Ending balance: total loans	16,445,272,000	12,503,294,000	16,445,272,000		12,503,294,000
Ending balance: individually evaluated for impairment, loans	139,160,000	102,671,000	139,160,000		102,671,000
Ending balance: collectively evaluated for impairment, loans	14,292,323,000	12,400,623,000	14,292,323,000		12,400,623,000
Ending balance: acquired loans accounted for under ASC 310-30	2,013,789,000		2,013,789,000
Commercial Real Estate
Allowance for loan losses:
Beginning balance, allowance	63,463,000	75,205,000	68,796,000		74,998,000	74,998,000
Charge-offs	(3,275,000)	(1,077,000)	(5,369,000)		(3,523,000)
Recoveries	1,490,000	591,000	3,788,000		7,555,000
Provision for (reversal of) loan losses	280,000	(1,447,000)	(5,257,000)		(5,758,000)
Ending balance, allowance	61,958,000	73,272,000	61,958,000		73,272,000	68,796,000
Ending balance: individually evaluated for impairment, allowance	1,184,000	3,317,000	1,184,000		3,317,000
Ending balance: collectively evaluated for impairment, allowance	60,774,000	69,955,000	60,774,000		69,955,000
Ending balance: total loans	10,286,033,000	6,712,406,000	10,286,033,000		6,712,406,000
Ending balance: individually evaluated for impairment, loans	28,797,000	37,988,000	28,797,000		37,988,000
Ending balance: collectively evaluated for impairment, loans	8,163,218,000	6,674,418,000	8,163,218,000		6,674,418,000
Ending balance: acquired loans accounted for under ASC 310-30	2,094,018,000		2,094,018,000
Consumer
Allowance for loan losses:
Beginning balance, allowance	55,909,000	46,185,000	48,636,000		47,467,000	47,467,000
Charge-offs	(6,026,000)	(3,993,000)	(17,363,000)		(13,888,000)
Recoveries	1,035,000	1,657,000	3,623,000		4,716,000
Provision for (reversal of) loan losses	10,126,000	5,012,000	26,148,000		10,566,000
Ending balance, allowance	61,044,000	48,861,000	61,044,000		48,861,000	$ 48,636,000
Ending balance: individually evaluated for impairment, allowance	881,000	970,000	881,000		970,000
Ending balance: collectively evaluated for impairment, allowance	60,163,000	47,891,000	60,163,000		47,891,000
Ending balance: total loans	9,709,182,000	6,385,197,000	9,709,182,000		6,385,197,000
Ending balance: individually evaluated for impairment, loans	31,459,000	28,963,000	31,459,000		28,963,000
Ending balance: collectively evaluated for impairment, loans	7,687,835,000	$ 6,356,234,000	7,687,835,000		$ 6,356,234,000
Ending balance: acquired loans accounted for under ASC 310-30	$ 1,989,888,000		$ 1,989,888,000
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses (Schedule of Impaired Loans) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 216,682,000		$ 216,682,000		$ 178,858,000
Recorded Investment, Without an ALL	35,463,000		35,463,000		22,563,000
Recorded Investment, With an ALL	163,953,000		163,953,000		144,363,000
Related Allowance	16,204,000		16,204,000		13,549,000
Average Recorded Investment	196,790,000	$ 174,925,000	192,993,000	$ 189,096,000
Interest Income Recognized	1,789,000	1,699,000	5,160,000	5,015,000	0
Interest income, cash basis method	310,000	391,000	1,000,000	926,000
Total commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	154,722,000		154,722,000		114,738,000
Recorded Investment, Without an ALL	33,534,000		33,534,000		22,298,000
Recorded Investment, With an ALL	105,626,000		105,626,000		83,124,000
Related Allowance	14,139,000		14,139,000		10,207,000
Average Recorded Investment	136,416,000	105,620,000	133,584,000	109,717,000
Interest Income Recognized	1,124,000	953,000	3,202,000	2,618,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	104,229,000		104,229,000		65,150,000
Recorded Investment, Without an ALL	33,534,000		33,534,000		22,298,000
Recorded Investment, With an ALL	55,413,000		55,413,000		34,222,000
Related Allowance	11,267,000		11,267,000		7,133,000
Average Recorded Investment	85,487,000	61,254,000	82,745,000	69,546,000
Interest Income Recognized	620,000	379,000	1,558,000	1,230,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	50,493,000		50,493,000		49,588,000
Recorded Investment, Without an ALL	0		0		0
Recorded Investment, With an ALL	50,213,000		50,213,000		48,902,000
Related Allowance	2,872,000		2,872,000		3,074,000
Average Recorded Investment	50,929,000	44,366,000	50,839,000	40,171,000
Interest Income Recognized	504,000	574,000	1,644,000	1,388,000
Total commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	30,123,000		30,123,000		35,785,000
Recorded Investment, Without an ALL	1,055,000		1,055,000		265,000
Recorded Investment, With an ALL	27,742,000		27,742,000		32,933,000
Related Allowance	1,184,000		1,184,000		2,598,000
Average Recorded Investment	29,170,000	40,622,000	29,289,000	49,120,000
Interest Income Recognized	313,000	417,000	945,000	1,428,000
Total commercial real estate | Investment properties
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	12,307,000		12,307,000		13,916,000
Recorded Investment, Without an ALL	0		0		0
Recorded Investment, With an ALL	12,307,000		12,307,000		13,916,000
Related Allowance	555,000		555,000		1,523,000
Average Recorded Investment	12,518,000	14,103,000	12,829,000	20,437,000
Interest Income Recognized	156,000	179,000	453,000	597,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	5,064,000		5,064,000		5,586,000
Recorded Investment, Without an ALL	0		0		0
Recorded Investment, With an ALL	5,005,000		5,005,000		5,586,000
Related Allowance	117,000		117,000		131,000
Average Recorded Investment	5,277,000	9,697,000	5,294,000	10,876,000
Interest Income Recognized	125,000	176,000	391,000	619,000
Total commercial real estate | Land and development
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	12,752,000		12,752,000		16,283,000
Recorded Investment, Without an ALL	1,055,000		1,055,000		265,000
Recorded Investment, With an ALL	10,430,000		10,430,000		13,431,000
Related Allowance	512,000		512,000		944,000
Average Recorded Investment	11,375,000	16,822,000	11,166,000	17,807,000
Interest Income Recognized	32,000	62,000	101,000	212,000
Total consumer
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	31,837,000		31,837,000		28,335,000
Recorded Investment, Without an ALL	874,000		874,000		0
Recorded Investment, With an ALL	30,585,000		30,585,000		28,306,000
Related Allowance	881,000		881,000		744,000
Average Recorded Investment	31,204,000	28,683,000	30,120,000	30,259,000
Interest Income Recognized	352,000	329,000	1,013,000	969,000
Total consumer | Consumer mortgages
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	18,881,000		18,881,000		19,506,000
Recorded Investment, Without an ALL	874,000		874,000		0
Recorded Investment, With an ALL	17,707,000		17,707,000		19,506,000
Related Allowance	372,000		372,000		343,000
Average Recorded Investment	19,278,000	19,966,000	19,627,000	20,397,000
Interest Income Recognized	206,000	226,000	635,000	621,000
Total consumer | Home equity lines
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	6,360,000		6,360,000		3,264,000
Recorded Investment, Without an ALL	0		0		0
Recorded Investment, With an ALL	6,282,000		6,282,000		3,235,000
Related Allowance	278,000		278,000		224,000
Average Recorded Investment	5,705,000	3,433,000	4,619,000	4,642,000
Interest Income Recognized	47,000	34,000	119,000	136,000
Total consumer | Other consumer loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	6,596,000		6,596,000		5,565,000
Recorded Investment, Without an ALL	0		0		0
Recorded Investment, With an ALL	6,596,000		6,596,000		5,565,000
Related Allowance	231,000		231,000		$ 177,000
Average Recorded Investment	6,221,000	5,284,000	5,874,000	5,220,000
Interest Income Recognized	$ 99,000	$ 69,000	$ 259,000	$ 212,000

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)Contract	Sep. 30, 2018USD ($)Contract	Sep. 30, 2019USD ($)Contract	Sep. 30, 2018USD ($)Contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	105	64	241	145
Recorded Investment	$ 14,621,000	$ 11,795,000	$ 31,352,000	$ 37,160,000
Net charge-offs		$ 88,000	$ 0	$ 88,000
Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	34	10	74	30
Recorded Investment	$ 8,177,000	$ 6,131,000	$ 15,822,000	$ 13,179,000
Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	27	7	61	21
Recorded Investment	$ 4,494,000	$ 565,000	$ 10,107,000	$ 2,130,000
Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	7	3	13	9
Recorded Investment	$ 3,683,000	$ 5,566,000	$ 5,715,000	$ 11,049,000
Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	9	7	23	20
Recorded Investment	$ 1,624,000	$ 1,324,000	$ 3,761,000	$ 12,791,000
Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	4	1	6	4
Recorded Investment	$ 385,000	$ 42,000	$ 1,048,000	$ 8,268,000
Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	4	5	14	12
Recorded Investment	$ 766,000	$ 1,211,000	$ 2,072,000	$ 2,667,000
Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	1	1	3	4
Recorded Investment	$ 473,000	$ 71,000	$ 641,000	$ 1,856,000
Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	62	47	144	95
Recorded Investment	$ 4,820,000	$ 4,340,000	$ 11,769,000	$ 11,190,000
Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	10	2	15	16
Recorded Investment	$ 1,126,000	$ 670,000	$ 2,577,000	$ 5,452,000
Total consumer | Home equity lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	25	1	50	4
Recorded Investment	$ 1,999,000	$ 191,000	$ 4,426,000	$ 511,000
Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | Contract	27	44	79	75
Recorded Investment	$ 1,695,000	$ 3,479,000	$ 4,766,000	$ 5,227,000
Below Market Interest Rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	8,868,000	2,579,000	19,416,000	20,145,000
Below Market Interest Rate | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	5,399,000	727,000	10,557,000	5,526,000
Below Market Interest Rate | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	2,577,000	0	5,703,000	0
Below Market Interest Rate | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	2,822,000	727,000	4,854,000	5,526,000
Below Market Interest Rate | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	1,624,000	487,000	3,761,000	7,461,000
Below Market Interest Rate | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	385,000	42,000	1,048,000	6,053,000
Below Market Interest Rate | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	766,000	445,000	2,072,000	1,408,000
Below Market Interest Rate | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	473,000	0	641,000	0
Below Market Interest Rate | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	1,845,000	1,365,000	5,098,000	7,158,000
Below Market Interest Rate | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	1,008,000	670,000	1,245,000	5,365,000
Below Market Interest Rate | Total consumer | Home equity lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	364,000	0	2,686,000	172,000
Below Market Interest Rate | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	473,000	695,000	1,167,000	1,621,000
Other Concessions
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	5,753,000	9,216,000	11,936,000	17,015,000
Other Concessions | Total commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	2,778,000	5,404,000	5,265,000	7,653,000
Other Concessions | Total commercial and industrial | Commercial, financial and agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	1,917,000	565,000	4,404,000	2,130,000
Other Concessions | Total commercial and industrial | Owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	861,000	4,839,000	861,000	5,523,000
Other Concessions | Total commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	0	837,000	0	5,330,000
Other Concessions | Total commercial real estate | Investment properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	0	0	0	2,215,000
Other Concessions | Total commercial real estate | 1-4 family properties
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	0	766,000	0	1,259,000
Other Concessions | Total commercial real estate | Land and development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	0	71,000	0	1,856,000
Other Concessions | Total consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	2,975,000	2,975,000	6,671,000	4,032,000
Other Concessions | Total consumer | Consumer mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	118,000	0	1,332,000	87,000
Other Concessions | Total consumer | Home equity lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	1,635,000	191,000	1,740,000	339,000
Other Concessions | Total consumer | Other consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	$ 1,222,000	$ 2,784,000	$ 3,599,000	$ 3,606,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2018	$ 57,315
Goodwill acquired during the year (preliminary allocation) and adjustments	430,550
Balance as of September 30, 2019	487,865
Synovus Bank Reporting Unit
Goodwill [Roll Forward]
Balance as of December 31, 2018	32,884
Goodwill acquired during the year (preliminary allocation) and adjustments	430,550
Balance as of September 30, 2019	463,434
Trust Services Reporting Unit
Goodwill [Roll Forward]
Balance as of December 31, 2018	24,431
Goodwill acquired during the year (preliminary allocation) and adjustments	0
Balance as of September 30, 2019	$ 24,431

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 487,865		$ 487,865			$ 57,315
Amortization of intangibles	2,901	$ 292	8,702	$ 875
FCB Financial Holdings, Inc.
Business Acquisition [Line Items]
Goodwill					$ 430,550
Core deposits	$ 49,600		$ 49,600		$ 57,400
FCB Financial Holdings, Inc. | Core Deposits
Business Acquisition [Line Items]
Useful life			10 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Other intangible assets, gross carrying amount	$ 70,328	$ 12,928
Other intangible assets, accumulated amortization	(11,756)	(3,053)
Other intangible assets, net carrying amount	$ 58,572	$ 9,875

Shareholders' Equity and Othe_3

Shareholders' Equity and Other Comprehensive Income (Loss) (Narrative) (Details) $ / shares in Units, shares in Millions	Jul. 01, 2019USD ($)$ / shares	Jan. 01, 2019USD ($)shares	Jun. 21, 2018USD ($)$ / shares	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2019USD ($)		Sep. 30, 2018USD ($)	Jun. 17, 2019USD ($)	Jan. 15, 2019USD ($)
Class of Stock [Line Items]
Authorized amount										$ 725,000,000	$ 400,000,000
Value repurchased				$ 343,690,000	$ 57,994,000		$ 688,860,000		$ 134,804,000
Proceeds from issuance of preferred stock							341,410,000	[1]	195,138,000
Common Stock
Class of Stock [Line Items]
Value repurchased						$ 688,500,000
Treasury Stock
Class of Stock [Line Items]
Value repurchased				$ 343,690,000	$ 57,994,000		$ 688,860,000		$ 134,804,000
Shares repurchased (in shares) | shares						18.8
Shares repurchased, average cost per share (in dollars per share) | $ / shares						$ 36.55
Series E Preferred Stock
Class of Stock [Line Items]
Face amount	$ 350,000,000
Proceeds from issuance of debt	$ 341,400,000
Redemption period from regulatory capital treatment	90 days
Preferred stock, redemption price per share (in usd per share) | $ / shares	$ 25
Series E Preferred Stock | Until July 1, 2024 (Excluding July 1, 2024)
Class of Stock [Line Items]
Preferred stock, dividend rate, percentage	5.875%
Series E Preferred Stock | From July 1, 2024 (Including July 1, 2024)
Class of Stock [Line Items]
Preferred stock, dividend rate, percentage	4.127%
Series D Preferred Stock
Class of Stock [Line Items]
Payments of stock issuance costs			$ 195,100,000
Redemption period from regulatory capital treatment			90 days
Preferred stock, redemption price per share (in usd per share) | $ / shares			$ 25
Proceeds from issuance of preferred stock			$ 200,000,000
Liquidation preference (in dollars per share) | $ / shares			$ 25
Series D Preferred Stock | From and Excluding June 21, 2023
Class of Stock [Line Items]
Preferred stock, dividend rate, percentage			6.30%
Series D Preferred Stock | From and Including June 21, 2023
Class of Stock [Line Items]
Preferred stock, dividend rate, percentage			3.352%
FCB Financial Holdings, Inc.
Class of Stock [Line Items]
Stock issued in acquisitions (in shares) | shares		49.5
Treasury stock reissued (in shares) | shares		27.4
Payments of stock issuance costs		$ 417,000
Consideration transferred		$ 1,626,278,000
FCB Financial Holdings, Inc. | Common Stock
Class of Stock [Line Items]
Stock issued in acquisitions (in shares) | shares		22
FCB Financial Holdings, Inc. | FCB Financial Holdings, Inc.
Class of Stock [Line Items]
Merger exchange ratio		1.055
[1]	Where applicable, changes for balances as of September 30, 2019 , compared to December 31, 2018, exclude amounts acquired on the Acquisition Date. See accompanying notes to unaudited interim consolidated financial statements.

Shareholders' Equity and Othe_4

Shareholders' Equity and Other Comprehensive Income (Loss) (Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	$ 4,753,816	$ 3,167,694	$ 3,133,602	$ 2,961,566
Other comprehensive income (loss), Net of Tax Amount	26,644	(18,000)	170,353	(81,495)
Balance	4,868,838	3,040,073	4,868,838	3,040,073
Accumulated other comprehensive income (loss)	(75,933)		(75,933)		$ 94,420
Total
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	49,289	(125,720)	(94,420)	(54,754)
Other comprehensive income (loss) before reclassifications	23,879	(17,974)	166,332	(82,383)
Amounts reclassified from AOCI	2,765	(26)	4,021	888
Other comprehensive income (loss), Net of Tax Amount	26,644	(18,000)	170,353	(81,495)
Reclassification from adoption of ASU 2018-02				(7,588)
Cumulative-effect adjustment from adoption of ASU 2016-01				117
Balance	75,933	(143,720)	75,933	(143,720)
Net unrealized losses on cash flow hedges | Valuation Allowance of Deferred Tax Assets
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Accumulated other comprehensive income (loss)	12,100		12,100
Net unrealized gains (losses) on investment securities available for sale
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	60,586	(114,565)	(83,179)	(43,470)
Other comprehensive income (loss) before reclassifications	25,133	(17,940)	167,586	(82,349)
Amounts reclassified from AOCI	2,765	0	4,077	960
Other comprehensive income (loss), Net of Tax Amount	27,898	(17,940)	171,663	(81,389)
Reclassification from adoption of ASU 2018-02				(7,763)
Cumulative-effect adjustment from adoption of ASU 2016-01				117
Balance	88,484	(132,505)	88,484	(132,505)
Net unrealized gains (losses) on investment securities available for sale | Valuation Allowance of Deferred Tax Assets
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Accumulated other comprehensive income (loss)	13,300		13,300
Net unrealized gains (losses) on cash flow hedges
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	(12,137)	(12,137)	(12,137)	(12,137)
Other comprehensive income (loss) before reclassifications	(876)	0	(876)	0
Amounts reclassified from AOCI	0	0	0	0
Other comprehensive income (loss), Net of Tax Amount	(876)	0	(876)	0
Reclassification from adoption of ASU 2018-02				0
Cumulative-effect adjustment from adoption of ASU 2016-01				0
Balance	(13,013)	(12,137)	(13,013)	(12,137)
Post-retirement unfunded health benefit
Changes in Accumulated Other Comprehensive Income (Loss) by Component [Roll Forward]
Balance	840	982	896	853
Other comprehensive income (loss) before reclassifications	(378)	(34)	(378)	(34)
Amounts reclassified from AOCI	0	(26)	(56)	(72)
Other comprehensive income (loss), Net of Tax Amount	(378)	(60)	(434)	(106)
Reclassification from adoption of ASU 2018-02				175
Cumulative-effect adjustment from adoption of ASU 2016-01				0
Balance	$ 462	$ 922	$ 462	$ 922

Fair Value Accounting (Financia

Fair Value Accounting (Financial Instruments Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	$ 6,892,162	$ 3,991,632
Mortgage loans held for sale	129,415	37,129
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	665,922	1,188,518
State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	2,089
U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	19,782	122,077
Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	69,681	97,205
Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,065,501	2,398,650
Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	379,671	129,865
Asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	506,331
Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	146,308	16,935
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	1,128
Investment securities available for sale	19,782	122,077
Private equity investments	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	0	0
Earnout liability	0	0
Derivative liabilities	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,000	2,002
Investment securities available for sale	6,870,389	3,867,770
Private equity investments	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	181,805	19,332
Earnout liability	0	0
Derivative liabilities	41,350	16,535
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	1,991	1,785
Private equity investments	11,289	11,028
GGL/SBA loans servicing asset	3,350	3,729
Derivative assets	0	0
Earnout liability	24,810	14,353
Derivative liabilities	3,335	1,673
Fair Value, Measurements, Recurring Basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,000	3,130
Investment securities available for sale	6,892,162	3,991,632
Mortgage loans held for sale	129,415	37,129
Private equity investments	11,289	11,028
GGL/SBA loans servicing asset	3,350	3,729
Derivative assets	181,805	19,332
Trading account liabilities	1,593
Earnout liability	24,810	14,353
Derivative liabilities	44,685	18,208
Fair Value, Measurements, Recurring Basis | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	30	44
Investment securities available for sale	36,877	38,382
Fair Value, Measurements, Recurring Basis | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,686
Investment securities available for sale	665,922	1,188,518
Fair Value, Measurements, Recurring Basis | Other mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,799
Fair Value, Measurements, Recurring Basis | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	485	1,064
Investment securities available for sale	2,089
Fair Value, Measurements, Recurring Basis | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		2,022
Fair Value, Measurements, Recurring Basis | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	19,782	122,077
Fair Value, Measurements, Recurring Basis | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	69,681	97,205
Fair Value, Measurements, Recurring Basis | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,065,501	2,398,650
Fair Value, Measurements, Recurring Basis | Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	379,671	129,865
Fair Value, Measurements, Recurring Basis | Asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	506,331
Fair Value, Measurements, Recurring Basis | Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	146,308	16,935
Fair Value, Measurements, Recurring Basis | Mutual funds and mutual funds held in rabbi trusts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mutual funds and mutual funds held in rabbi trusts	31,429	16,012
Fair Value, Measurements, Recurring Basis | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	1,128
Investment securities available for sale	19,782	122,077
Mortgage loans held for sale	0	0
Private equity investments	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	0	0
Trading account liabilities	0
Earnout liability	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Other mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities
Fair Value, Measurements, Recurring Basis | Level 1 | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0
Fair Value, Measurements, Recurring Basis | Level 1 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		1,128
Fair Value, Measurements, Recurring Basis | Level 1 | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	19,782	122,077
Fair Value, Measurements, Recurring Basis | Level 1 | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0
Fair Value, Measurements, Recurring Basis | Level 1 | Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 1 | Mutual funds and mutual funds held in rabbi trusts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mutual funds and mutual funds held in rabbi trusts	31,429	16,012
Fair Value, Measurements, Recurring Basis | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,000	2,002
Investment securities available for sale	6,870,389	3,867,770
Mortgage loans held for sale	129,415	37,129
Private equity investments	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	181,805	19,332
Trading account liabilities	1,593
Earnout liability	0	0
Derivative liabilities	41,350	16,535
Fair Value, Measurements, Recurring Basis | Level 2 | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	30	44
Investment securities available for sale	36,877	38,382
Fair Value, Measurements, Recurring Basis | Level 2 | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,686
Investment securities available for sale	665,922	1,188,518
Fair Value, Measurements, Recurring Basis | Level 2 | Other mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	1,799
Fair Value, Measurements, Recurring Basis | Level 2 | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	485	1,064
Investment securities available for sale	2,089
Fair Value, Measurements, Recurring Basis | Level 2 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		894
Fair Value, Measurements, Recurring Basis | Level 2 | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 2 | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	69,681	97,205
Fair Value, Measurements, Recurring Basis | Level 2 | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	5,065,501	2,398,650
Fair Value, Measurements, Recurring Basis | Level 2 | Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	379,671	129,865
Fair Value, Measurements, Recurring Basis | Level 2 | Asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	506,331
Fair Value, Measurements, Recurring Basis | Level 2 | Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	144,317	15,150
Fair Value, Measurements, Recurring Basis | Level 2 | Mutual funds and mutual funds held in rabbi trusts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mutual funds and mutual funds held in rabbi trusts	0	0
Fair Value, Measurements, Recurring Basis | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	1,991	1,785
Mortgage loans held for sale	0	0
Private equity investments	11,289	11,028
GGL/SBA loans servicing asset	3,350	3,729
Derivative assets	0	0
Trading account liabilities	0
Earnout liability	24,810	14,353
Derivative liabilities	3,335	1,673
Fair Value, Measurements, Recurring Basis | Level 3 | U.S. Government agency securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Other mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities
Fair Value, Measurements, Recurring Basis | Level 3 | State and municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Investment securities available for sale	0
Fair Value, Measurements, Recurring Basis | Level 3 | Other investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities		0
Fair Value, Measurements, Recurring Basis | Level 3 | U.S. Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Mortgage-backed securities issued by U.S. Government agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Mortgage-backed securities issued by U.S. Government sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring Basis | Level 3 | Asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	0
Fair Value, Measurements, Recurring Basis | Level 3 | Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale	1,991	1,785
Fair Value, Measurements, Recurring Basis | Level 3 | Mutual funds and mutual funds held in rabbi trusts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mutual funds and mutual funds held in rabbi trusts	$ 0	$ 0

Fair Value Accounting (Mortgage

Fair Value Accounting (Mortgage Loans Held for Sale and Changes in Fair Value Included in Consolidated Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 126,541		$ 126,541		$ 35,848
Fair value less aggregate unpaid principal balance	2,874		2,874		1,281
Mortgage loans held for sale	892	$ (569)	1,593	$ (414)
Fair value
Financing Receivable, Impaired [Line Items]
Loans receivable held-for-sale	$ 129,415		$ 129,415		$ 37,129

Fair Value Accounting (Changes

Fair Value Accounting (Changes in Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Losses included in earnings attributable to the change in unrealized losses relating to assets/liabilities	$ (12,200)	$ (11,200)	$ (9,900)	$ (16,600)
GGL / SBA Loans Servicing Asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	3,326	4,186	3,729	4,101
Included in earnings	(298)	(561)	(1,091)	(1,295)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	322	136	712	955
Settlements	0	0	0	0
Ending balance	3,350	3,761	3,350	3,761
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	0	0	0
Earnout Liability
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(14,353)	(11,348)	(14,353)	(11,348)
Included in earnings	(10,457)	(11,652)	(10,457)	(11,652)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	0	0	0	0
Settlements	0	0	0	0
Ending balance	(24,810)	(23,000)	(24,810)	(23,000)
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	(10,457)	(11,652)	(10,457)	(11,652)
Visa Derivative
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(1,049)	(5,943)	(1,673)	(4,330)
Included in earnings	(2,500)	0	(2,500)	(2,328)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	0	0	0	0
Settlements	214	3,953	838	4,668
Ending balance	(3,335)	(1,990)	(3,335)	(1,990)
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	(2,500)	0	(2,500)	(2,328)
Investment Securities Available for Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	2,017	1,857	1,785	1,935
Included in earnings	0	0	0	0
Unrealized gains (losses) included in OCI	(26)	108	206	30
Additions	0	0	0	0
Settlements	0	0	0	0
Ending balance	1,991	1,965	1,991	1,965
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	0	0	0
Private Equity Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	13,341	12,678	11,028	15,771
Included in earnings	1,194	434	3,507	(2,659)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	0	0	0	0
Settlements	(3,246)	0	(3,246)	0
Ending balance	11,289	13,112	11,289	13,112
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	$ 777	$ 434	$ 3,090	$ (2,659)

Fair Value Accounting (Assets M

Fair Value Accounting (Assets Measured at Fair Value on Non-Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Other assets held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate	$ 13,700	$ 6,200
Fair Value, Measurements, Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,477	21,742
Other loans held for sale	0	1,494
Other real estate	1,523	3,827
Other assets held for sale	350	1,104
Fair Value, Measurements, Nonrecurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other loans held for sale	0	0
Other real estate	0	0
Other assets held for sale	0	0
Fair Value, Measurements, Nonrecurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other loans held for sale	0	0
Other real estate	0	0
Other assets held for sale	0	0
Fair Value, Measurements, Nonrecurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,477	21,742
Other loans held for sale	0	1,494
Other real estate	1,523	3,827
Other assets held for sale	$ 350	$ 1,104

Fair Value Accounting (Fair Val

Fair Value Accounting (Fair Value Adjustments Recognized in Earnings for Assets Measured at Fair Value on a Non-recurring Basis) (Details) - Fair Value, Measurements, Nonrecurring Basis - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 4,170	$ 1,223	$ 4,718	$ 4,594
Other real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	74	61	569	61
Other assets held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value adjustment	$ 0	$ 0	$ 91	$ 499

Fair Value Accounting (Carrying

Fair Value Accounting (Carrying and Estimated Fair Values of Financial Instruments Carried on Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial assets
Investment securities available for sale	$ 6,892,162	$ 3,991,632
Loans, net	36,152,813	25,696,018
Financial liabilities
Non-interest-bearing deposits	9,586,148	7,650,967
Total deposits	37,433,070	26,720,322
Federal funds purchased and securities sold under repurchase agreements	197,419	237,692
Other short-term borrowings	2,233,593	650,000
Long-term debt	2,153,600	1,657,157
Mortgage loans held for sale
Financial assets
Loans receivable held-for-sale	129,415	37,129
Level 1
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	1,182,470	1,143,564
Trading securities	0	1,128
Investment securities available for sale	19,782	122,077
Private equity investments	0	0
Mutual funds and mutual funds held in rabbi trusts	31,429	16,012
Loans, net	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	0	0
Financial liabilities
Non-interest-bearing deposits	0	0
Non-time interest-bearing deposits	0	0
Time deposits	0	0
Total deposits	0	0
Federal funds purchased and securities sold under repurchase agreements	197,419	237,692
Other short-term borrowings	0	0
Long-term debt	0	0
Earnout liability	0	0
Derivative liabilities	0
Level 1 | Mortgage loans held for sale
Financial assets
Loans receivable held-for-sale	0	0
Level 1 | Other loans for sale
Financial assets
Loans receivable held-for-sale		0
Level 2
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	0	0
Trading securities	4,000	2,002
Investment securities available for sale	6,870,389	3,867,770
Private equity investments	0	0
Mutual funds and mutual funds held in rabbi trusts	0	0
Loans, net	0	0
GGL/SBA loans servicing asset	0	0
Derivative assets	181,805	19,332
Financial liabilities
Non-interest-bearing deposits	9,586,148	7,650,967
Non-time interest-bearing deposits	18,313,513	14,065,959
Time deposits	9,578,012	4,989,570
Total deposits	37,477,673	26,706,496
Federal funds purchased and securities sold under repurchase agreements	0	0
Other short-term borrowings	2,233,593	650,000
Long-term debt	2,176,073	1,649,642
Earnout liability	0	0
Derivative liabilities	41,350	16,535
Level 2 | Mortgage loans held for sale
Financial assets
Loans receivable held-for-sale	129,415	37,129
Level 2 | Other loans for sale
Financial assets
Loans receivable held-for-sale		0
Level 3
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	0	0
Trading securities	0	0
Investment securities available for sale	1,991	1,785
Private equity investments	11,289	11,028
Mutual funds and mutual funds held in rabbi trusts	0	0
Loans, net	36,154,866	25,438,890
GGL/SBA loans servicing asset	3,350	3,729
Derivative assets	0	0
Financial liabilities
Non-interest-bearing deposits	0	0
Non-time interest-bearing deposits	0	0
Time deposits	0	0
Total deposits	0	0
Federal funds purchased and securities sold under repurchase agreements	0	0
Other short-term borrowings	0	0
Long-term debt	0	0
Earnout liability	24,810	14,353
Derivative liabilities	3,335	1,673
Level 3 | Mortgage loans held for sale
Financial assets
Loans receivable held-for-sale	0	0
Level 3 | Other loans for sale
Financial assets
Loans receivable held-for-sale		1,506
Carrying Value
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	1,182,470	1,143,564
Trading securities	4,000	3,130
Investment securities available for sale	6,892,162	3,991,632
Private equity investments	11,289	11,028
Mutual funds and mutual funds held in rabbi trusts	31,429	16,012
Loans, net	36,152,813	25,696,018
GGL/SBA loans servicing asset	3,350	3,729
Derivative assets	181,805	19,332
Financial liabilities
Non-interest-bearing deposits	9,586,148	7,650,967
Non-time interest-bearing deposits	18,313,513	14,065,959
Time deposits	9,533,409	5,003,396
Total deposits	37,433,070	26,720,322
Federal funds purchased and securities sold under repurchase agreements	197,419	237,692
Other short-term borrowings	2,233,593	650,000
Long-term debt	2,153,600	1,657,157
Earnout liability	24,810	14,353
Derivative liabilities	44,685	18,208
Carrying Value | Mortgage loans held for sale
Financial assets
Loans receivable held-for-sale	129,415	37,129
Carrying Value | Other loans for sale
Financial assets
Loans receivable held-for-sale		1,506
Fair Value
Financial assets
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	1,182,470	1,143,564
Trading securities	4,000	3,130
Investment securities available for sale	6,892,162	3,991,632
Private equity investments	11,289	11,028
Mutual funds and mutual funds held in rabbi trusts	31,429	16,012
Loans, net	36,154,866	25,438,890
GGL/SBA loans servicing asset	3,350	3,729
Derivative assets	181,805	19,332
Financial liabilities
Non-interest-bearing deposits	9,586,148	7,650,967
Non-time interest-bearing deposits	18,313,513	14,065,959
Time deposits	9,578,012	4,989,570
Total deposits	37,477,673	26,706,496
Federal funds purchased and securities sold under repurchase agreements	197,419	237,692
Other short-term borrowings	2,233,593	650,000
Long-term debt	2,176,073	1,649,642
Earnout liability	24,810	14,353
Derivative liabilities	44,685	18,208
Fair Value | Mortgage loans held for sale
Financial assets
Loans receivable held-for-sale	$ 129,415	37,129
Fair Value | Other loans for sale
Financial assets
Loans receivable held-for-sale		$ 1,506

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Collateral requirements	$ 105,500,000
Variation margin, amount reducing derivative asset	141,100,000	$ 3,100,000
Credit Risk Contract | Sold
Derivative [Line Items]
Notional amount	139,200,000	69,900,000
Credit Risk Contract | Purchased
Derivative [Line Items]
Notional amount	3,100,000
Foreign Currency Exchange Forwards
Derivative [Line Items]
Notional amount	37,400,000	28,800,000
Cash Flow Hedges
Derivative [Line Items]
Derivative instruments	0	0
Fair Value Hedges
Derivative [Line Items]
Derivative instruments	$ 0	$ 0

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities (Impact of Derivatives on Balance Sheet) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Derivatives not designated as hedging instruments
Derivative [Line Items]
Fair Value of Derivative Assets	$ 180,890,000	$ 19,332,000
Fair Value of Derivative Liabilities	42,588,000	18,208,000
Derivatives not designated as hedging instruments | Interest rate contracts
Derivative [Line Items]
Notional Amount	6,402,871,000	1,840,288,000
Fair Value of Derivative Assets	178,976,000	18,388,000
Fair Value of Derivative Liabilities	38,702,000	15,716,000
Derivatives not designated as hedging instruments | Mortgage derivatives | Interest rate lock commitments
Derivative [Line Items]
Notional Amount	125,023,000	52,420,000
Fair Value of Derivative Assets	1,914,000	944,000
Fair Value of Derivative Liabilities	0	0
Derivatives not designated as hedging instruments | Mortgage derivatives | Frward commitments to sell fixed-rate mortgage loans
Derivative [Line Items]
Notional Amount	161,500,000	65,500,000
Fair Value of Derivative Assets	0	0
Fair Value of Derivative Liabilities	407,000	819,000
Derivatives not designated as hedging instruments | Other contracts
Derivative [Line Items]
Notional Amount	139,167,000	69,902,000
Fair Value of Derivative Assets	0	0
Fair Value of Derivative Liabilities	144,000	0
Derivatives not designated as hedging instruments | Visa derivative
Derivative [Line Items]
Fair Value of Derivative Assets	0	0
Fair Value of Derivative Liabilities	3,335,000	1,673,000
Cash flow hedges
Derivative [Line Items]
Fair Value of Derivative Assets	915,000	0
Fair Value of Derivative Liabilities	2,097,000	0
Cash flow hedges | Interest rate contracts
Derivative [Line Items]
Notional Amount	1,000,000,000	0
Fair Value of Derivative Assets	915,000	0
Fair Value of Derivative Liabilities	$ 2,097,000	$ 0

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities (Effect of Fair Value Hedges on Consolidated Statements of Income) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative [Line Items]
Gain (Loss) Recognized in Consolidated Statements of Income	$ (1,431)	$ 69	$ (621)	$ (2,021)
Interest rate contracts | Capital markets income
Derivative [Line Items]
Gain (Loss) Recognized in Consolidated Statements of Income	549	1	640	(8)
Other contracts | Capital markets income
Derivative [Line Items]
Gain (Loss) Recognized in Consolidated Statements of Income	(144)	0	(144)	0
Mortgage derivatives | Interest rate lock commitments | Mortgage banking income
Derivative [Line Items]
Gain (Loss) Recognized in Consolidated Statements of Income	22	(427)	970	(61)
Mortgage derivatives | Frward commitments to sell fixed-rate mortgage loans | Mortgage banking income
Derivative [Line Items]
Gain (Loss) Recognized in Consolidated Statements of Income	642	495	413	376
Visa derivative | Other non-interest expense
Derivative [Line Items]
Gain (Loss) Recognized in Consolidated Statements of Income	$ (2,500)	$ 0	$ (2,500)	$ (2,328)

Net Income Per Common Share (Sc

Net Income Per Common Share (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic Net Income Per Common Share:
Net income available to common shareholders	$ 127,435	$ 99,330	$ 397,505	$ 308,559
Weighted average common shares outstanding (in shares)	152,238	117,241	156,819	118,096
Net income per common share, basic (in dollars per share)	$ 0.84	$ 0.85	$ 2.53	$ 2.61
Diluted Net Income Per Common Share:
Net income available to common shareholders	$ 127,435	$ 99,330	$ 397,505	$ 308,559
Weighted average common shares outstanding (in shares)	152,238	117,241	156,819	118,096
Effect of dilutive outstanding equity-based awards, warrants, and earnout payments	1,805	854	1,776	751
Weighted average number of diluted common shares (in shares)	154,043	118,095	158,595	118,847
Net income per common share, diluted (in dollars per share)	$ 0.83	$ 0.84	$ 2.51	$ 2.60

Net Income Per Common Share (Na

Net Income Per Common Share (Narrative) (Details) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Potentially dilutive shares (in shares)	40	2,200

Share-based Compensation (Narra

Share-based Compensation (Narrative) (Details) shares in Thousands, $ in Thousands	Jan. 01, 2019USD ($)shares	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)shares	Sep. 30, 2018USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Assumed (in shares) | shares				3,230
Exercised (in shares) | shares				585
Merger-related Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 0	$ 0	$ 4,219	$ 0
FCB Financial Holdings, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Assumed (in shares) | shares	3,200
Exercised (in shares) | shares	136
Converted options and restricted share units, fair value	$ 41,500
Cash equivalents	3,500
FCB Financial Holdings, Inc. | Merger-related Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3,900
FCB Financial Holdings, Inc. | Merger-related Expense, Settle in Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3,500
FCB Financial Holdings, Inc. | Merger-related Expense, Settled in Cash
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	400
FCB Financial Holdings, Inc. | FCB Financial Holdings, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other equity compensation, non-vested shares outstanding, fair value	$ 7,500
Merger exchange ratio	1.055
FCB Financial Holdings, Inc. | Compensation Expense and Remaining to Purchase Price
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Converted options and restricted share units, fair value	$ 4,200

Share-based Compensation (Stock

Share-based Compensation (Stock Options) (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Quantity
Outstanding at January 1, 2019 (in shares) | shares	640
Assumed (in shares) | shares	3,230
Exercised (in shares) | shares	(585)
Outstanding at September 30, 2019 (in shares) | shares	3,285
Weighted-Average Exercise Price Per Share
Outstanding at January 1, 2019 (in dollars per share) | $ / shares	$ 16.93
Assumed (in dollars per share) | $ / shares	23.22
Exercised (in dollars per share) | $ / shares	20.10
Outstanding at September 30, 2019 (in dollars per share) | $ / shares	$ 22.55

Share-based Compensation (Share

Share-based Compensation (Share Units) (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2019$ / sharesshares
Restricted Share Units
Quantity
Non-vested at January 1, 2019 (in shares) | shares	526
Granted (in shares) | shares	541
Assumed (in shares) | shares	136
Quantity change by TSR factor (in shares) | shares	0
Dividend equivalents granted (in shares) | shares	17
Vested (in shares) | shares	(298)
Forfeited (in shares) | shares	(100)
Non-vested at September 30, 2019 (in shares) | shares	822
Weighted-Average Grant Date Fair Value Per Share
Non-vested at January 1, 2019 (in dollars per share) | $ / shares	$ 41.18
Granted (in dollars per share) | $ / shares	36.26
Assumed (in dollars per share) | $ / shares	31.99
Quantity change by TSR factor (in dollars per share) | $ / shares	0
Dividend equivalents granted (in dollars per share) | $ / shares	36.26
Vested (in dollars per share) | $ / shares	36.78
Forfeited (in dollars per share) | $ / shares	36.43
Non-vested at September 30, 2019 (in dollars per share) | $ / shares	$ 38.49
Market Restricted Share Units
Quantity
Non-vested at January 1, 2019 (in shares) | shares	144
Granted (in shares) | shares	151
Assumed (in shares) | shares	0
Quantity change by TSR factor (in shares) | shares	(19)
Dividend equivalents granted (in shares) | shares	4
Vested (in shares) | shares	(58)
Forfeited (in shares) | shares	(19)
Non-vested at September 30, 2019 (in shares) | shares	203
Weighted-Average Grant Date Fair Value Per Share
Non-vested at January 1, 2019 (in dollars per share) | $ / shares	$ 41.91
Granted (in dollars per share) | $ / shares	36.96
Assumed (in dollars per share) | $ / shares	0
Quantity change by TSR factor (in dollars per share) | $ / shares	37.76
Dividend equivalents granted (in dollars per share) | $ / shares	36.96
Vested (in dollars per share) | $ / shares	37.76
Forfeited (in dollars per share) | $ / shares	40.94
Non-vested at September 30, 2019 (in dollars per share) | $ / shares	$ 39.80
Performance Share Units
Quantity
Non-vested at January 1, 2019 (in shares) | shares	248
Granted (in shares) | shares	140
Assumed (in shares) | shares	0
Quantity change by TSR factor (in shares) | shares	0
Dividend equivalents granted (in shares) | shares	13
Vested (in shares) | shares	(93)
Forfeited (in shares) | shares	(31)
Non-vested at September 30, 2019 (in shares) | shares	277
Weighted-Average Grant Date Fair Value Per Share
Non-vested at January 1, 2019 (in dollars per share) | $ / shares	$ 38.29
Granted (in dollars per share) | $ / shares	37.34
Assumed (in dollars per share) | $ / shares	0
Quantity change by TSR factor (in dollars per share) | $ / shares	0
Dividend equivalents granted (in dollars per share) | $ / shares	37.34
Vested (in dollars per share) | $ / shares	26.35
Forfeited (in dollars per share) | $ / shares	40.34
Non-vested at September 30, 2019 (in dollars per share) | $ / shares	$ 41.56

Share-based Compensation (Expen

Share-based Compensation (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Salaries and other personnel expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 4,992	$ 3,976	$ 16,705	$ 11,725
Merger-related expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	0	0	4,219	0
Other operating expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	179	208	472	779
Non-interest expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 5,171	$ 4,184	$ 21,396	$ 12,504

Leases (Details)

Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)renewal_option	Jan. 01, 2019USD ($)
Assets and Liabilities, Lessee [Abstract]
Assets operating	$ 379,456	$ 379,456	$ 381,100
Assets finance	3,011	3,011
Total leased assets	382,467	382,467
Liabilities operating	387,898	387,898	391,000
Present value of lease liabilities	2,767	2,767
Total lease liabilities	390,665	390,665
Finance lease asset, accumulated amortization	671	671
Lease, Cost [Abstract]
Operating lease cost, net	8,199	24,508
Amortization of leased assets	223	671
Interest on lease liabilities	18	57
Sublease income	(157)	(479)
Net lease cost	8,283	24,757
Rental income	$ 631	$ 1,900
Weighted-average remaining lease term (years), Operating leases	21 years 2 months 12 days	21 years 2 months 12 days
Weighted-average discount rate (percentage), Operating leases	3.54%	3.54%
Weighted-average remaining lease term (years), Finance leases	4 years 10 days	4 years 10 days
Weighted-average discount rate (percentage), Finance leases	2.42%	2.42%
Operating cash flows from operating leases		$ (22,318)
Operating cash flows from finance leases		(57)
Financing cash flows from finance leases		(639)
Maturity of Lease Liabilities, Operating Leases
2019	$ 7,541	7,541
2020	30,164	30,164
2021	28,975	28,975
2022	28,235	28,235
2023	26,426	26,426
After 2023	443,238	443,238
Total lease payments	564,579	564,579
Less: Imputed interest	176,681	176,681
Present value of lease liabilities	387,898	387,898	$ 391,000
Maturity of Lease Liabilities, Finance Leases
2019	193	193
2020	871	871
2021	839	839
2022	465	465
2023	180	180
After 2023	343	343
Total lease payments	2,891	2,891
Less: Imputed interest	124	124
Present value of lease liabilities	2,767	2,767
Maturity of Lease Liabilities, Total
2019	7,734	7,734
2020	31,035	31,035
2021	29,814	29,814
2022	28,700	28,700
2023	26,606	26,606
After 2023	443,581	443,581
Total lease payments	567,470	567,470
Less: Imputed interest	176,805	176,805
Present value of lease liabilities	390,665	390,665
Minimum lease payments related to operating leases that had not yet commenced	$ 11,200	$ 11,200
Minimum
Lessee, Lease, Description [Line Items]
Number of renewal options | renewal_option		1
Term of contract	1 year	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	5 years	5 years

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Loss Contingencies [Line Items]
Carrying amount included in other assets	$ 108,025,000		$ 108,025,000		$ 83,736,000
Amount of future funding commitments included in carrying amount	49,179,000		49,179,000		47,123,000
Short-term construction loans and letter of credit commitments	259,000		259,000		1,585,000
Funded portion of short-term loans and letters of credit	2,822,000		2,822,000		5,595,000
Contractual amount net of risk participations	33,000,000		33,000,000		46,000,000
Guarantor obligations, advanced payment to merchant	21,700,000		21,700,000		22,900,000
Minimum
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	0		0
Maximum
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	5,000,000		5,000,000
Guarantee obligations
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	12,492,345,000		12,492,345,000		10,153,558,000
Maximum potential exposure for sponsored transactions	19,130,000,000	$ 17,690,000,000	55,720,000,000	$ 52,040,000,000
Letters of credit
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	203,224,000		203,224,000		157,675,000
Commitments to fund commercial and industrial loans
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	6,702,472,000		6,702,472,000		5,527,017,000
Commitments to fund commercial real estate, construction, and land development loans
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	2,734,852,000		2,734,852,000		2,034,223,000
Commitments under home equity lines of credit
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	1,464,720,000		1,464,720,000		1,258,657,000
Unused credit card lines
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	899,379,000		899,379,000		775,003,000
Other loan commitments
Loss Contingencies [Line Items]
Total unfunded lending commitments and letters of credit	$ 487,698,000		$ 487,698,000		$ 400,983,000