Stifel Financial (SF) 10-K 20 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 15, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	SF
Entity Registrant Name	STIFEL FINANCIAL CORP
Entity Central Index Key	720,672
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		71,878,667
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Public Float			$ 3.8
Entity Current Reporting Status	Yes

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents		$ 1,936,560	$ 696,283
Cash segregated for regulatory purposes		132,814	90,802
Receivables:
Brokerage clients, net		1,201,477	1,384,096
Brokers, dealers, and clearing organizations		515,574	459,107
Securities purchased under agreements to resell	[1]	699,900	512,220
Financial instruments owned, at fair value		1,267,449	1,143,684
Available-for-sale securities, at fair value		3,070,447	3,773,508
Held-to-maturity securities, at amortized cost	[2]	4,218,854	3,698,098
Loans held for sale, at lower of cost or market		205,557	226,068
Bank loans, net		8,517,615	6,947,759
Investments, at fair value		67,982	111,379
Fixed assets, net		372,939	155,120
Goodwill		1,034,679	968,834
Intangible assets, net		119,655	109,627
Loans and advances to financial advisors and other employees, net		408,436	378,124
Deferred tax assets, net		112,008	105,152
Other assets		637,652	624,092
Total Assets		24,519,598	21,383,953
Payables:
Brokerage clients		837,379	828,206
Brokers, dealers, and clearing organizations		432,299	276,302
Drafts		104,887	107,043
Securities sold under agreements to repurchase	[3]	535,394	233,704
Bank deposits		15,863,613	13,411,935
Financial instruments sold, but not yet purchased, at fair value		947,306	778,863
Accrued compensation		460,347	493,973
Accounts payable and accrued expenses		344,152	308,911
Federal Home Loan Bank advances		540,000	745,000
Borrowings		180,655	256,000
Senior notes, net		1,015,973	1,014,940
Debentures to Stifel Financial Capital Trusts		60,000	67,500
Total liabilities		21,322,005	18,522,377
Shareholders’ Equity
Preferred stock − $1 par value; authorized 3,000,000 shares; 6,000 issued		150,000	150,000
Common stock − $0.15 par value; authorized 97,000,000 shares; issued 74,441,017 and 71,636,986 shares, respectively		11,166	10,746
Additional paid-in-capital		1,893,304	1,733,348
Retained earnings		1,366,503	1,033,526
Accumulated other comprehensive loss		(72,523)	(26,736)
Treasury stock, at cost, 3,639,399 and 772,302 shares, respectively		(180,857)	(39,308)
Total Stifel Financial Corp. Shareholders’ Equity		3,167,593	2,861,576
Non-controlling interests		30,000
Total Shareholders' Equity		3,197,593	2,861,576
Total Liabilities and Shareholders' Equity		$ 24,519,598	$ 21,383,953
[1]	Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.
[3]	Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Consolidated Statements Of Fi_2

Consolidated Statements Of Financial Condition (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	6,000	6,000
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	97,000,000	97,000,000
Common stock, shares issued	74,441,017	71,636,986
Treasury stock, shares	3,639,399	772,302

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Revenue from contracts with customers		$ 2,187,145
Principal transactions		351,378	$ 396,826	$ 475,428
Interest		646,449	454,381	294,332
Other income		25,553	37,524	46,798
Total revenues		3,194,957	2,996,462	2,642,370
Interest expense		170,076	70,030	66,874
Net revenues	[1]	3,024,881	2,926,432	2,575,496
Non-interest expenses:
Compensation and benefits		1,770,762	1,958,929	1,726,016
Occupancy and equipment rental		222,384	222,708	231,324
Communications and office supplies		140,254	133,493	139,644
Commissions and floor brokerage		41,967	44,132	44,315
Other operating expenses		315,152	297,634	291,615
Total non-interest expenses		2,490,519	2,656,896	2,432,914
Income before income tax expense		534,362	269,536	142,582
Provision for income taxes		140,394	86,665	61,062
Net income		393,968	182,871	81,520
Preferred dividends		9,375	9,375	3,906
Net Income available to common shareholders		$ 384,593	$ 173,496	$ 77,614
Earnings per common share:
Basic		$ 5.36	$ 2.53	$ 1.16
Diluted		$ 4.73	$ 2.14	$ 1
Weighted-average number of common shares outstanding:
Basic		71,786	68,562	66,871
Diluted		81,321	81,035	77,563
Cash dividends declared per common share		$ 0.48	$ 0.20	$ 0
Commissions [Member]
Revenues:
Revenue from contracts with customers		$ 657,732	$ 678,904	$ 729,989
Investment Banking [Member]
Revenues:
Revenue from contracts with customers		707,670	726,763	513,034
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers		$ 806,175	$ 702,064	$ 582,789
[1]	No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2018, 2017, and 2016.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 393,968	$ 182,871	$ 81,520
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains/(losses) on available-for-sale securities, net of tax	[1],[2],[3]	(36,254)	4,730	5,803
Changes in unrealized gains/(losses) on cash flow hedging instruments, net of tax	[2],[3],[4]	(792)	(320)	7,288
Foreign currency translation adjustment, net of tax	[2],[3]	(5,691)	7,896	(12,600)
Total other comprehensive income/(loss), net of tax		(42,737)	12,306	491
Comprehensive income		$ 351,231	$ 195,177	$ 82,011
[1]	Amounts are net of reclassifications to earnings of realized losses of $2.9 and realized gains of $0.2 million for the years ended December 31, 2018 and 2017, respectively. There were no reclassifications to earnings of realized gains for the year ended December 31, 2016.
[2]	Net of a tax benefit of $11.2 million and tax expenses of $3.3 million and $0.3 million for the years ended December 31, 2018, 2017, and 2016, respectively.
[3]	The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio risk. The reclassification is reflected in the activity for the year ended December 31, 2018. See Note 2 for further details.
[4]	Amounts are net of reclassifications to earnings of gains of $4.9 million and losses of $0.6 million and $5.4 million for the years ended December 31, 2018, 2017, and 2016, respectively.

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other comprehensive income/(loss), tax	$ (11,200)	$ 3,300	$ 300
Reclassifications to earnings of realized gains on available-for-sale securities	2,900	200	0
Reclassifications to earnings of gains/(losses) on cash flow hedging instruments	4,900	$ (600)	$ (5,400)
ASU 2018-02 [Member]
Reclassification to retained earnings related to cash flow hedges and investment portfolio credit risk	$ 3,100

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands		Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock at Cost [Member]	Parent [Member]	Non-controlling Interests [Member]
Balance, beginning of year at Dec. 31, 2015					$ 10,426	$ 1,820,772	$ 805,685	$ (39,533)	$ (104,934)
Common stock issued under employee plans									104,375
Common stock repurchased									(113,462)
Common stock issued for acquisitions						(723)			13,536
Unit amortization, net of forfeitures						189,746
Net income		$ 81,520					81,520
Dividends declared, Preferred							(3,906)
Common stock issued under employee plans and related tax benefits						(159,391)	(6,341)
Tax deficit from stock-based compensation	[1]					(4,904)
Issuance of preferred stock				$ 150,000		(4,949)
Unrealized gains/(losses) on securities, net of tax								5,803
Unrealized gains/(losses) on cash flow hedging activities, net of tax								7,288
Foreign currency translation adjustment, net of tax		(12,600)	[2],[3]					(12,600)
Balance, end of year at Dec. 31, 2016		2,738,408		150,000	10,426	1,840,551	876,958	(39,042)	(100,485)	$ 2,738,408
Common stock issued under employee plans					292				74,175
Common stock repurchased		(13,000)							(12,998)
Common stock issued for acquisitions					28	9,324
Unit amortization, net of forfeitures						167,908
Dividends declared to equity-award holders						3,758
Net income		182,871					182,871
Dividends declared, Common							(17,446)
Dividends declared, Preferred							(9,375)
Common stock issued under employee plans and related tax benefits						(288,152)
Other						(41)	518
Unrealized gains/(losses) on securities, net of tax								4,730
Unrealized gains/(losses) on cash flow hedging activities, net of tax								(320)
Foreign currency translation adjustment, net of tax		7,896	[2],[3]					7,896
Balance, end of year at Dec. 31, 2017		2,861,576		150,000	10,746	1,733,348	1,033,526	(26,736)	(39,308)	2,861,576
Common stock issued under employee plans					123				28,655
Common stock repurchased		(170,200)							(170,204)
Common stock issued for acquisitions					297	110,374
Unit amortization, net of forfeitures						102,971
Dividends declared to equity-award holders						6,812
Net income		393,968					393,968
Dividends declared, Common							(41,450)
Dividends declared, Preferred							(9,375)
Common stock issued under employee plans and related tax benefits						(60,256)	(10,985)
Other						55	1,943
Unrealized gains/(losses) on securities, net of tax								(36,254)
Unrealized gains/(losses) on cash flow hedging activities, net of tax								(792)
Foreign currency translation adjustment, net of tax		(5,691)	[2],[3]					(5,691)
Balance, end of year at Dec. 31, 2018		$ 3,197,593		$ 150,000	$ 11,166	$ 1,893,304	1,366,503	(72,523)	$ (180,857)	$ 3,167,593	$ 30,000
Non-controlling interests											$ 30,000
Cumulative effect of adoption of ASU | ASU 2014-09 [Member]							(4,174)
Cumulative effect of adoption of ASU | ASU 2018-02 [Member]							$ 3,050	$ (3,050)
[1]	During the year ended December 31, 2017, we adopted new stock-based compensation guidance. See Note 2 of the Notes to Consolidated Financial Statements for additional information.
[2]	Net of a tax benefit of $11.2 million and tax expenses of $3.3 million and $0.3 million for the years ended December 31, 2018, 2017, and 2016, respectively.
[3]	The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio risk. The reclassification is reflected in the activity for the year ended December 31, 2018. See Note 2 for further details.

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Stockholders Equity [Abstract]
Preferred stock, par value	$ 1	$ 1	$ 1
Common stock, par value	$ 0.15	$ 0.15	$ 0.15

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities:
Net income	$ 393,968	$ 182,871	$ 81,520
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Depreciation and amortization	27,896	32,495	43,147
Amortization of loans and advances to financial advisors and other employees	85,374	91,594	94,754
Amortization of premium on investment portfolio	25,307	15,837	12,258
Provision for loan losses and allowance for loans and advances to financial advisors and other employees	19,601	25,985	17,793
Amortization of intangible assets	12,557	12,135	14,427
Deferred income taxes	14,254	118,129	46,062
Tax deficit from stock-based compensation			4,904
Stock-based compensation	100,789	140,461	186,303
(Gain)/losses on sale of investments	22,780	(2,359)	5,563
Gain on extinguishment of Stifel Financial Capital Trust			(5,607)
Other, net	(10,723)	3,037	4,676
Receivables:
Brokerage clients, net	182,619	31,840	177,300
Brokers, dealers, and clearing organizations	(56,467)	566,454	(439,601)
Securities purchased under agreements to resell	(187,680)	(263,632)	(88,165)
Financial instruments owned, including those pledged	(123,765)	(217,386)	(175,602)
Loans originated as held for sale	(1,341,108)	(1,564,386)	(2,658,254)
Proceeds from mortgages held for sale	1,345,109	1,558,327	2,624,950
Loans and advances to financial advisors and other employees	(116,921)	(72,215)	(92,830)
Other assets	(1,562)	(113,875)	(158,875)
Increase/(decrease) in operating liabilities, net of liabilities assumed:
Brokerage clients	9,173	(13,808)	(158,408)
Brokers, dealers, and clearing organizations	(16,383)	(79,905)	(62,105)
Drafts	(2,156)	12,592	(89,406)
Financial instruments sold, but not yet purchased	168,443	79,831	177,288
Other liabilities and accrued expenses	(21,579)	135,894	(3,500)
Net cash provided by/(used in) operating activities	529,526	679,916	(441,408)
Cash Flows From Investing Activities:
Maturities, calls, sales, and principal paydowns of available-for-sale securities	1,244,434	985,520	403,951
Calls and principal paydowns of held-to-maturity securities	827,905	370,019	251,439
Sale of equipment	21,699
Sale or maturity of investments	24,445	28,839	40,175
Disposition of business, net			21,340
Increase in bank loans, net	(1,079,546)	(1,374,959)	(2,462,405)
Payments for:
Purchase of available-for-sale securities	(550,162)	(1,583,369)	(1,961,419)
Purchase of held-to-maturity securities	(1,352,587)	(1,033,700)	(1,437,725)
Purchase of investments	(8,828)	(4,296)	(9,278)
Purchase of fixed assets	(108,207)	(28,217)	(28,211)
Acquisitions, net of cash acquired	(8,394)	(7,220)	(72,383)
Net cash used in investing activities	(989,241)	(2,647,383)	(5,254,516)
Cash Flows from Financing Activities:
Proceeds from/(repayments of) short-term borrowings, net	(216,572)	(121,000)	287,916
Proceeds from issuance of senior notes, net		217,913	201,632
Proceeds from advances from the FHLB, net		245,000	352,000
Repayments of advances from the FHLB, net	(214,950)
Proceeds from non-controlling interests	30,000
Issuance of preferred stock, net of issuance costs			145,051
Increase/(decrease) in securities sold under agreements to repurchase	301,690	(34,842)	(10,128)
Increase in bank deposits, net	1,950,661	1,884,452	4,889,127
Increase/(decrease) in securities loaned	172,380	(166,900)	146,838
Tax deficit from stock-based compensation			(4,904)
Tax payments related to shares withheld for stock-based compensation plans	(43,229)	(214,744)	(61,601)
Proceeds from stock option exercises	2,278		543
Repurchase of common stock	(170,204)	(12,998)	(113,462)
Cash dividends on preferred stock	(9,375)	(9,375)	(3,906)
Cash dividends paid to common stock and equity-award holders	(34,638)	(13,688)
Extinguishment of Stifel Financial Capital Trust	(7,500)		(9,393)
Repayment of Senior Notes			(150,000)
Contingent consideration	(12,846)	(13,328)	(13,110)
Net cash provided by financing activities	1,747,695	1,760,490	5,656,603
Effect of exchange rate changes on cash	(5,691)	7,895	(12,600)
Increase/(decrease) in cash, cash equivalents, and cash segregated for regulatory purposes	1,282,289	(199,082)	(51,921)
Cash, cash equivalents, and cash segregated for regulatory purposes at beginning of year	787,085	986,167	1,038,088
Cash, cash equivalents, and cash segregated for regulatory purposes at end of year	2,069,374	787,085	986,167
Supplemental disclosure of cash flow information:
Cash paid for interest	169,724	69,781	62,145
Cash paid for income taxes, net of refunds	67,379	21,516	22,946
Noncash investing and financing activities:
Unit grants, net of forfeitures	136,529	71,300	190,211
Issuance of common stock for acquisitions	$ 110,671	$ 9,352	$ 12,813

Cash, Cash Equivalents, and Cas

Cash, Cash Equivalents, and Cash Restricted for Regulatory Purposes for Periods Presented in Consolidated Statement of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Cash Flows [Abstract]
Cash and cash equivalents	$ 1,936,560	$ 696,283	$ 912,932
Cash segregated for regulatory purposes	132,814	90,802	73,235
Total cash, cash equivalents, and cash segregated for regulatory purposes	$ 2,069,374	$ 787,085	$ 986,167

Nature Of Operations And Basis

Nature Of Operations And Basis Of Presentation	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature Of Operations And Basis Of Presentation	Nature of Operations Stifel Financial Corp. (the “Company”), through its wholly owned subsidiaries, is principally engaged in retail brokerage; securities trading; investment banking; investment advisory; retail, consumer, and commercial banking; and related financial services. Our major geographic area of concentration is throughout the United States, with a growing presence in the United Kingdom and Europe. Our company’s principal customers are individual investors, corporations, municipalities, and institutions. Basis of Presentation The consolidated financial statements include Stifel Financial Corp. and its wholly owned subsidiaries, principally Stifel, Nicolaus & Company, Incorporated (“Stifel”), Keefe Bruyette & Woods (“KBW”), and Stifel Bancorp, Inc. (“Stifel Bancorp”). Unless otherwise indicated, the terms “we,” “us,” “our,” or “our company” in this report refer to Stifel Financial Corp. and its wholly owned subsidiaries. The accompanying consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, which require management to make certain estimates and assumptions that affect the reported amounts. We consider significant estimates, which are most susceptible to change and impacted significantly by judgments, assumptions, and estimates, to be: valuation of financial instruments and investments in partnerships, accrual for contingencies, allowance for loan losses, derivative instruments and hedging activities, fair value of goodwill and intangible assets, provision for income taxes and related tax reserves, and forfeitures associated with stock-based compensation. Actual results could differ from those estimates. Certain amounts from prior periods have been reclassified to conform to the current period’s presentation. The effect of these reclassifications on our company’s previously reported consolidated financial statements was not material. Consolidation Policies The consolidated financial statements include the accounts of Stifel Financial Corp. and its subsidiaries. All material intercompany balances and transactions have been eliminated in consolidation. For consolidated subsidiaries that are less than wholly owned, the third-party holdings of equity interests are referred to as non-controlling interests. The portion of shareholders’ equity that is attributable to non-controlling interests for such subsidiaries is presented as non-controlling interests, a component of total equity, in the consolidated statements of financial condition. Our non-controlling interest represents a 27.5% third-party ownership of North Shore Aviation Holdings LLC (“North Shore”), a wholly owned subsidiary of the Company, that through its subsidiary owns 5 airplane engines. See Note 9 for additional information on operating leases. We also have investments or interests in other entities for which we must evaluate whether to consolidate by determining whether we have a controlling financial interest or are considered to be the primary beneficiary. In determining whether to consolidate these entities, we evaluate whether the entity is a voting interest entity or a variable interest entity (“VIE”). When we do not have a controlling interest in an entity, but we exert significant influence over the entity, we apply the equity method of accounting. Voting Interest Entity – Voting interest entities are entities that have (i) total equity investment at risk sufficient to fund expected future operations independently, and (ii) equity holders who have the obligation to absorb losses or receive residual returns and the right to make decisions about the entity’s activities. We consolidate voting interest entities when we determine that there is a controlling financial interest, usually ownership of all, or a majority of, the voting interest. Variable Interest Entity – VIEs are entities that lack one or more of the characteristics of a voting interest entity. We are required to consolidate certain VIEs in which we have the power to direct the activities of the entity and the obligation to absorb significant losses or receive significant benefits. In other cases, we consolidate VIEs when we are deemed to be the primary beneficiary. The primary beneficiary is defined as the entity that has a variable interest, or a combination of variable interests, that maintains control and receives benefits or will absorb losses that are not pro rata with its ownership interests. The determination as to whether an entity is a VIE is based on the structure and nature of the entity. We also consider other characteristics, such as the ability to influence the decision-making relative to the entity’s activities and how the entity is financed. With the exception of entities eligible for the deferral codified in Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2010-10, “Consolidation: Amendments for Certain Investment Funds” (“ASU 2010-10”) (generally asset managers and investment companies), ASC 810 states that a controlling financial interest in an entity is present when an enterprise has a variable interest, or combination of variable interests, that have both the power to direct the activities of the entity that most significantly impact the entity’s economic performance and the obligation to absorb losses of the entity or the rights to receive benefits from the entity that could potentially be significant to the entity. Entities meeting the deferral provision defined by ASU 2010-10 are evaluated under the historical VIE guidance. Under the historical guidance, a controlling financial interest in an entity is present when an enterprise has a variable interest, or combination of variable interests, that will absorb a majority of the entity’s expected losses, receive a majority of the entity’s expected residual returns, or both. The enterprise with a controlling financial interest, known as the primary beneficiary, consolidates the VIE. We determine whether we are the primary beneficiary of a VIE by first performing a qualitative analysis of the VIE’s control structure, expected benefits and losses, and expected residual returns. This analysis includes a review of, among other factors, the VIE’s capital structure, contractual terms, which interests create or absorb benefits or losses, variability, related party relationships, and the design of the VIE. Where a qualitative analysis is not conclusive, we perform a quantitative analysis. We reassess our initial evaluation of an entity as a VIE and our initial determination of whether we are the primary beneficiary of a VIE upon the occurrence of certain reconsideration events. See Note 28 for additional information on VIEs.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Cash and Cash Equivalents We consider money market mutual funds and highly liquid investments with original maturities of three months or less that are not restricted or segregated to be cash equivalents. Cash and cash equivalents include deposits with banks, federal funds sold, money market mutual funds, and certificates of deposit. Cash and cash equivalents also include balances that our bank subsidiaries maintain at the Federal Reserve Bank. Cash Segregated for Regulatory Purposes Our broker-dealer subsidiaries are subject to Rule 15c3-3 under the Securities Exchange Act of 1934, which requires our company to maintain cash or qualified securities in a segregated reserve account for the exclusive benefit of its clients. In accordance with Rule 15c3-3, our company has portions of its cash segregated for the exclusive benefit of clients at December 31, 2018. Brokerage Client Receivables, Net Brokerage client receivables include receivables of our company’s broker-dealer subsidiaries, which represent amounts due on cash and margin transactions and are generally collateralized by securities owned by clients. Brokerage client receivables, primarily consisting of floating-rate loans collateralized by customer-owned securities, are charged interest at rates similar to other such loans made throughout the industry. The receivables are reported at their outstanding principal balance net of allowance for doubtful accounts. When a brokerage client receivable is considered to be impaired, the amount of the impairment is generally measured based on the fair value of the securities acting as collateral, which is measured based on current prices from independent sources, such as listed market prices or broker-dealer price quotations. Securities owned by customers, including those that collateralize margin or other similar transactions, are not reflected in the consolidated statements of financial condition. Securities Borrowed and Securities Loaned Securities borrowed require our company to deliver cash to the lender in exchange for securities and are included in receivables from brokers, dealers, and clearing organizations in the consolidated statements of financial condition. For securities loaned, we generally receive collateral in the form of cash in an amount in excess of the market value of securities loaned. Securities loaned are included in payables to brokers, dealers, and clearing organizations in the consolidated statements of financial condition. We monitor the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as necessary. Fees received or paid are recorded in interest revenue or interest expense in the consolidated statements of operations. Substantially all of these transactions are executed under master netting agreements, which gives us right of offset in the event of counterparty default; however, such receivables and payables with the same counterparty are not set off in the consolidated statements of financial condition. Securities Purchased Under Agreements to Resell and Repurchase Agreements Securities purchased under agreements to resell (“resale agreements”) are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. We obtain control of collateral with a market value equal to or in excess of the principal amount loaned and accrued interest under resale agreements. These agreements are short-term in nature and are generally collateralized by U.S. government securities, U.S. government agency securities, and corporate bonds. We value collateral on a daily basis, with additional collateral obtained when necessary to minimize the risk associated with this activity. Securities sold under agreements to repurchase (“repurchase agreements”) are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. We make delivery of securities sold under agreements to repurchase and monitor the value of collateral on a daily basis. When necessary, we will deliver additional collateral. Financial Instruments We measure certain financial assets and liabilities at fair value on a recurring basis, including cash equivalents, financial instruments owned, available-for-sale securities, investments, financial instruments sold, but not yet purchased, and derivatives. Other than those separately discussed in the notes to the consolidated financial statements, the remaining financial instruments are generally short-term in nature, and their carrying values approximate fair value. The fair value of a financial instrument is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., “the exit price”) in an orderly transaction between market participants at the measurement date. We have categorized our financial instruments measured at fair value into a three-level classification in accordance with Topic 820, “Fair Value Measurement,” Level 1 – Quoted prices (unadjusted) are available in active markets for identical assets or liabilities as of the measurement date. A quoted price for an identical asset or liability in an active market provides the most reliable fair value measurement, because it is directly observable to the market. Level 2 – Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the measurement date. The nature of these financial instruments includes instruments for which quoted prices are available but traded less frequently, derivative instruments whose fair value have been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed. Level 3 – Instruments that have little to no pricing observability as of the measurement date. These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation. Valuation of Financial Instruments When available, we use observable market prices, observable market parameters, or broker or dealer prices (bid and ask prices) to derive the fair value of financial instruments. In the case of financial instruments transacted on recognized exchanges, the observable market prices represent quotations for completed transactions from the exchange on which the financial instrument is principally traded. A substantial percentage of the fair value of our financial instruments owned, available-for-sale securities, investments, and financial instruments sold, but not yet purchased, are based on observable market prices, observable market parameters, or derived from broker or dealer prices. The availability of observable market prices and pricing parameters can vary from product to product. Where available, observable market prices and pricing or market parameters in a product may be used to derive a price without requiring significant judgment. In certain markets, observable market prices or market parameters are not available for all products, and fair value is determined using techniques appropriate for each particular product. These techniques involve some degree of judgment. For investments in illiquid or privately held securities that do not have readily determinable fair values, the determination of fair value requires us to estimate the value of the securities using the best information available. Among the factors we consider in determining the fair value of investments are the cost of the investment, terms and liquidity, developments since the acquisition of the investment, the sales price of recently issued securities, the financial condition and operating results of the issuer, earnings trends and consistency of operating cash flows, the long-term business potential of the issuer, the quoted market price of securities with similar quality and yield that are publicly traded, and other factors generally pertinent to the valuation of investments. In instances where a security is subject to transfer restrictions, the value of the security is based primarily on the quoted price of a similar security without restriction but may be reduced by an amount estimated to reflect such restrictions. The fair value of these investments is subject to a high degree of volatility and may be susceptible to significant fluctuation in the near term, and the differences could be material. The degree of judgment used in measuring the fair value of financial instruments generally correlates to the level of pricing observability. Pricing observability is impacted by a number of factors, including the type of financial instrument, whether the financial instrument is new to the market and not yet established, and the characteristics specific to the transaction. Financial instruments with readily available active quoted prices for which fair value can be measured from actively quoted prices generally will have a higher degree of pricing observability and a lesser degree of judgment used in measuring fair value. Conversely, financial instruments rarely traded or not quoted will generally have less, or no, pricing observability and a higher degree of judgment used in measuring fair value. See Note 5 for additional information on how we value our financial instruments. Available-for-Sale and Held-to-Maturity Securities Securities available for sale, which are carried at fair value, include U.S. government agency securities; state and municipal securities; agency, non-agency, and commercial mortgage-backed securities; corporate fixed income securities; and asset-backed securities, which primarily includes collateralized loan obligations. Securities held to maturity are recorded at amortized cost based on our company’s positive intent and ability to hold these securities to maturity. Securities held to maturity include agency, commercial, and non-agency mortgage-backed securities, asset-backed securities, consisting of collateralized loan obligation securities and ARS, and corporate fixed income securities. We evaluate all securities in an unrealized loss position quarterly to assess whether the impairment is other-than-temporary. Our other-than-temporary impairment (“OTTI”) assessment is a subjective process requiring the use of judgments and assumptions. Accordingly, we consider a number of qualitative and quantitative criteria in our assessment, including the extent and duration of the impairment, recent events specific to the issuer and/or industry to which the issuer belongs, the payment structure of the security, external credit ratings and the failure of the issuer to make scheduled interest or principal payments, the value of underlying collateral, current market conditions, and our company’s ability and intent to hold the investment until its value recovers or the securities mature. We may determine that the decline in fair value of an investment is other-than-temporary if our analysis of these factors indicates that we will not recover our investment in the securities. If we determine that impairment on our debt securities is other-than-temporary and we have made the decision to sell the security or it is more likely than not that we will be required to sell the security prior to recovery of its amortized cost basis, we recognize the entire portion of the impairment in earnings. If we have not made a decision to sell the security and we do not expect that we will be required to sell the security prior to recovery of the amortized cost basis, we recognize only the credit component of OTTI in other operating expenses in the consolidated statements of operations. The remaining unrealized loss due to factors other than credit, or the non-credit component, is recorded in accumulated other comprehensive loss. We determine the credit component based on the difference between the security’s amortized cost basis and the present value of its expected future cash flows, discounted based on the purchase yield. The non-credit component represents the difference between the security’s fair value and the present value of expected future cash flows. We estimate the portion of loss attributable to credit using a discounted cash flow model. Key assumptions used in estimating the expected cash flows include default rates, loss severity, and prepayment rates. Assumptions used can vary widely based on the collateral underlying the securities and are influenced by factors such as collateral type, loan interest rate, geographical location of the borrower, and borrower characteristics. Unrealized gains and losses on our available-for-sale securities are reported, net of taxes, in accumulated other comprehensive loss included in shareholders’ equity. Amortization of premiums and accretion of discounts are recorded as interest income in the consolidated statements of operations using the interest method. Realized gains and losses from sales of securities available for sale are determined on a specific identification basis and are included in other income in the consolidated statements of operations in the period they are sold. For securities transferred from available-for-sale to held-to-maturity, carrying value also includes unrealized gains and losses recognized in accumulated other comprehensive loss at the date of transfer. Such unrealized gains or losses are accreted over the remaining life of the security with no impact on future net income. Loan Classification We classify loans based on our investment strategy and management’s assessment of our intent and ability to hold loans for the foreseeable future or until maturity. Management’s intent and ability with respect to certain loans may change from time to time depending on a number of factors, including economic, liquidity, and capital conditions. The accounting and measurement framework for loans differs depending on the loan classification. The classification criteria and accounting and measurement framework for bank loans and loans held for sale are described below. Bank Loans and Allowance for Loan Losses Bank loans consist of commercial and residential mortgage loans, commercial and industrial loans, stock-secured loans, home equity loans, construction loans, and consumer loans originated or acquired by Stifel Bancorp. Bank loans include those loans that management has the intent and ability to hold and are recorded at outstanding principal adjusted for any charge-offs, allowance for loan losses, deferred origination fees and costs, and purchased discounts. Loan origination costs, net of fees, and premiums and discounts on purchased loans are deferred and recognized over the contractual life of the loan as an adjustment of yield using the interest method. Bank loans are generally collateralized by real estate, real property, marketable securities, or other assets of the borrower. Interest income is recognized using the effective interest rate method, which is based upon the respective interest rates and the average daily asset balance. Discount accretion/premium amortization is recognized using the effective interest rate method, which is based upon the respective interest rate and expected lives of loans. We regularly review the loan portfolio and have established an allowance for loan losses for inherent losses estimated to have occurred in the loan portfolio through a provision for loan losses charged to other operating expenses in the consolidated statements of operations. In providing for the allowance for loan losses, we consider historical loss experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective, as it requires estimates that are susceptible to significant revision as more information becomes available. Loans Held for Sale Loans that we intend to sell or for which we do not have the ability and intent to hold for the foreseeable future are classified as held for sale. Loans held for sale consist of fixed-rate and adjustable-rate residential and multi-family real estate mortgage loans intended for sale. Loans held for sale are stated at lower of cost or market value on an individual loan basis. Declines in market value below cost and any gains or losses on the sale of these assets are recognized in other income in the consolidated statements of operations. Market value is determined based on prevailing market prices for loans with similar characteristics or on sale contract prices. Deferred fees and costs related to these loans are not amortized but are recognized as part of the cost basis of the loan at the time it is sold. Because loans held for sale are reported at lower of cost or market value, an allowance for loan losses is not established for loans held for sale. Impaired Loans A loan is considered impaired when, based on current information and events, it is probable that the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement will not be collectible. Factors considered in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. We determine the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record, and the amount of the shortfall in relation to the principal and interest owed. We consider a loan a trouble debt restructuring when an existing borrower is granted concessionary rates or terms, which would not otherwise be offered. The concessions granted do not reflect current market conditions for a new loan of similar risk to another borrower in similar financial circumstances. Once a loan is determined to be impaired, when principal or interest becomes 90 days past due or when collection becomes uncertain, the accrual of interest and amortization of deferred loan origination fees is discontinued (“non-accrual status”) and any accrued and unpaid interest income is reversed. Loans placed on non-accrual status are returned to accrual status when all delinquent principal and interest payments are collected and the collectibility of future principal and interest payments is reasonably assured. Loan losses are charged against the allowance for loan losses when we believe the uncollectibility of a loan balance is certain. Subsequent recoveries, if any, are credited to the allowance for loan losses. Large groups of smaller balance homogenous loans are collectively evaluated for impairment. Accordingly, we do not separately identify individual consumer and residential loans for impairment measurements. Impairment is measured on a loan-by-loan basis for non-homogeneous loans, and a specific allowance is established for individual loans determined to be impaired. Impairment is measured by comparing the carrying value of the impaired loan to the present value of its expected cash flow discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. Investments Our broker-dealer subsidiaries report changes in fair value of marketable and non-marketable securities in other income in the consolidated statements of operations. The fair value of marketable investments is generally based on either quoted market or dealer prices. The fair value of non-marketable securities is based on management’s estimate using the best information available, which generally consists of quoted market prices for similar securities and internally developed discounted cash flow models. Investments in the consolidated statements of financial condition contain investments in securities that are marketable and securities that are not readily marketable. These investments are not included in our broker-dealer trading inventory or available-for-sale or held-to-maturity portfolios and represent the acquiring and disposing of debt or equity instruments for our benefit. Fixed Assets, Net Office equipment is depreciated on a straight-line basis over the estimated useful life of the asset of two to seven years. Leasehold improvements are amortized on a straight-line basis over the lesser of the estimated useful life of the asset or the term of the lease. Buildings and building improvements are amortized on a straight-line basis over the estimated useful life of the asset of three to thirty-nine years. Depreciation expense is recorded in occupancy and equipment rental in the consolidated statements of operations. Office equipment, leasehold improvements, and property are stated at cost net of accumulated depreciation and amortization in the consolidated statements of financial condition. Fixed assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Goodwill and Intangible Assets Goodwill represents the cost of acquired businesses in excess of the fair value of the related net assets acquired. We test goodwill for impairment on an annual basis and on an interim basis when certain events or circumstances exist. We test for impairment at the reporting unit level, which is generally at the level of or one level below our company’s business segments. For both the annual and interim tests, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, we determine it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then performing the two-step impairment test is not required. However, if we conclude otherwise, we are then required to perform the first step of the two-step impairment test. Goodwill impairment is determined by comparing the estimated fair value of a reporting unit with its respective carrying value. If the estimated fair value exceeds the carrying value, goodwill at the reporting unit level is not deemed to be impaired. If the estimated fair value is below carrying value, however, further analysis is required to determine the amount of the impairment. Additionally, if the carrying value of a reporting unit is zero or a negative value and it is determined that it is more likely than not the goodwill is impaired, further analysis is required. The estimated fair values of the reporting units are derived based on valuation techniques we believe market participants would use for each of the reporting units. The Company performed impairment testing on October 1, 2018 with no impairment charges resulting from the annual impairment tests. Identifiable intangible assets, which are amortized over their estimated useful lives, are tested for potential impairment whenever events or changes in circumstances suggest that the carrying value of an asset or asset group may not be fully recoverable. Loans and Advances to Financial Advisors and Other Employees, Net We offer transition pay, principally in the form of upfront loans, to financial advisors and certain key revenue producers as part of our company’s overall growth strategy. These loans are generally forgiven by a charge to compensation and benefits over a five- to ten-year period if the individual satisfies certain conditions, usually based on continued employment and certain performance standards. We monitor and compare individual financial advisor production to each loan issued to ensure future recoverability. If the individual leaves before the term of the loan expires or fails to meet certain performance standards, the individual is required to repay the balance. In determining the allowance for doubtful receivables from former employees, management considers the facts and circumstances surrounding each receivable, including the amount of the unforgiven balance, the reasons for the terminated employment relationship, and the former employees’ overall financial situation. Derivative Instruments and Hedging Activities We recognize all of our derivative instruments at fair value as either assets or liabilities in the consolidated statements of financial condition. These instruments are recorded in other assets or accounts payable and accrued expenses in the consolidated statements of financial condition and in the operating section of the consolidated statements of cash flows as increases or decreases of other assets and accounts payable and accrued expenses. Our company’s policy is not to offset fair value amounts recognized for derivative instruments and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from derivative instruments recognized at fair value executed with the same counterparty under master netting arrangements. The accounting for changes in the fair value (i.e., gains and losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, further, on the type of hedging relationship. For those derivative instruments that are designated and qualify as hedging instruments, we must also designate the hedging instrument or transaction, based upon the exposure being hedged. For derivative instruments that are designated and qualify as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of accumulated other comprehensive loss, net of tax, and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The remaining gain or loss on the derivative instrument in excess of the cumulative change in the present value of future cash flows of the hedged item, if any, is recognized in current earnings during the period of change. We do not use derivatives for trading or speculative purposes and, at December 31, 2018, all of our derivatives are designated as cash flow hedges. See Note 14 for additional details. Revenue Recognition Customer securities transactions are recorded on a settlement date basis, with related commission revenues and expenses recorded on a trade date basis. Commission revenues are recorded as the amount charged to the customer, which, in certain cases, may include varying discounts. Principal securities transactions are recorded on a trade date basis. We typically distribute our proprietary equity research products to our client base of institutional investors at no charge. These proprietary equity research products are accounted for as a cost of doing business. Advisory fees from mergers and acquisitions engagements are recognized at a point in time when the related transaction is completed, as the performance obligation is to successfully broker a specific transaction. Advisory expenses had historically been deferred until reimbursed by the client, the related fee revenue was recognized or the engagement was otherwise concluded. Under the new revenue standard, expenses are deferred only to the extent they are explicitly reimbursable by the client and the related revenue has been recognized. All other investment banking advisory related expenses, including expenses incurred related to restructuring assignments, are expensed as incurred. Underwriting expenses had historically been recorded net of client reimbursements and/or netted against revenues. Under the new revenue standard, all investment banking expenses are recognized as non-interest expense in other operating expenses in the consolidated statements of operations and any expense reimbursements are recognized as investment banking revenues (i.e., expenses are no longer recorded net of client reimbursements and are not netted against revenues). Asset management and service fees. We earn management and performance fees in connection with investment advisory services provided to institutional and individual clients. Investment advisory fees are charged based on the value of assets in fee-based accounts and are affected by changes in the balances of client assets due to market fluctuations and levels of net new client assets. Fees are charged either in advance based on fixed rates applied to the value of the customers’ account at the beginning of the period or periodically based on contracted rates and account performance. Contracts can be terminated at any time with no incremental payments due to our company upon termination. If the contract is terminated by the customer fees are prorated for the period and fees charged for the post termination period are refundable to the customer. We earn fees from the investment partnerships that we manage or of which we are a general partner. Such management fees are generally based on the net assets or committed capital of the underlying partnerships. We have agreed, in certain cases, to waive management fees, in lieu of making a cash contribution, in satisfaction of our general partner investment commitments to the investment partnerships. In these cases, we generally recognize our management fee revenues at the time when we are allocated a special profit interest in realized gains from these partnerships. Direct Financing and The net investment in direct financing leases is included in other assets in the consolidated balance sheets and consists of the present values of the sum of the future minimum lease payments and estimated residual value of the leased assets. Revenue consists of interest earned on the net investment and is recognized over the lease term as a constant percentage return thereon. The net investment in property on operating leases is included in fixed assets, net in the consolidated balance sheets. Depreciation is recognized, on the straight-line basis, over the lease term to the estimated residual value. Operating lease revenue is recorded on a straight-line basis and is recognized over the lease term in other income. Estimated residual values are established at lease inception utilizing contract terms, past customer experience, and general market data and are reviewed and adjusted, if necessary, on an annual basis. See Note 3 – Acquisitions for further details. We lease office space and equipment under operating leases. We recognize rent expense related to these operating leases on a straight-line basis over the lease term. The lease term commences on the earlier of the date when we become legally obligated for the rent payments or the date on which we take possession of the property. For tenant improvement allowances and rent holidays, we record a deferred rent liability in accounts payable and accrued expenses in the consolidated statements of financial condition and amortize the deferred rent over the lease term as a reduction to occupancy and equipment rental in the consolidated statements of operations. Income Taxes On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (“Tax Legislation”) was signed into law making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of U.S international taxation from a worldwide tax system to a territorial system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. We compute income taxes using the asset and liability method, under which deferred income taxes are provided for the temporary differences between the financial statement carrying amounts and the tax basis of our company’s assets and liabilities. We establish a valuation allowance for deferred tax assets if it is more likely than not that these items will either expire before we are able to realize their benefits, or that future deductibility is uncertain. We re

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions	Rand & Associates On October 1, 2018, the Company completed the acquisition of Rand & Associates (“Rand”), an independent investment adviser that provides comprehensive wealth management and investment counsel services to individuals, families, and institutions. The acquisition was funded with cash from operations. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805 (“ASC Topic 805”), “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $8.3 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management segment. Identifiable intangible assets purchased by our company consisted of customer relationships with an acquisition-date fair value of $4.6 million. The allocation of the purchase price of Rand is preliminary and will be finalized upon completion of the analysis of the fair values of the net assets of Rand as of the acquisition date and the identified intangible assets. The final goodwill recorded on the consolidated statement of financial condition may differ from that reflected herein as a result of future measurement period adjustments and the recording of identified intangible assets. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the Rand business and of the hired financial advisors and the conversion of the customer accounts to our platform. Goodwill is expected to be deductible for federal income tax purposes. We recognized a liability for estimated earn-out payments. These payments will be based on the performance of Rand over a five-year period. The liability for earn-out payments was $4.1 million at December 31, 2018. The contingent consideration accrual is included in accounts payable and accrued expenses in the consolidated statements of financial condition. Pro forma information is not presented, because the acquisition is not considered to be material, as defined by the SEC. The results of operations of Rand have been included in our results prospectively from the date of acquisition. Business Bancshares, Inc. On August 31, 2018, the Company completed the acquisition of Business Bancshares, Inc. (“BBI”) and its wholly owned subsidiary, The Business Bank of St. Louis, a full-service banking facility that operates from a single location. Upon the closing of the transaction, the Business Bank of St. Louis was renamed “Stifel Bank” and Business Bancshares, Inc. was renamed “Stifel Bancorp, Inc.” Stifel Bancorp, Inc. (“Stifel Bancorp”) is the holding company for Stifel Bank & Trust, and its wholly owned subsidiaries, and Stifel Bank. Under the terms of the merger agreement, each outstanding share of BBI common stock (except for shares of BBI common stock held by BBI as treasury stock) were converted into the right to receive 0.705 shares of our company’s common stock, with fractional shares settled with cash. We issued approximately 2.0 million shares for acquisition of BBI. We acquired approximately $507.8 million of loans, and $85.7 million of other assets (primarily cash and due from banks and investment securities). In addition, we assumed approximately $501.1 million of deposits and $21.9 million of other liabilities. Assets acquired and liabilities assumed were recorded at fair value. The fair values for loans were estimated using discounted cash flow analyses using interest rates currently being offered for loans with similar terms. This value was reduced by an estimate of probable losses and the credit risk associated with the loans. The fair values of deposits were estimated by discounting cash flows using interest rates currently being offered on deposits with similar maturities. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $38.4 million of goodwill and intangibles in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management segment. Identifiable intangible assets purchased by our company consisted of core deposits with an acquisition date fair value of $8.6 million. The allocation of the purchase price of BBI is preliminary and will be finalized upon completion of the analysis of the fair values of the net assets of BBI as of the acquisition date and the identified intangible assets. The final goodwill recorded on the consolidated statement of financial condition may differ from that reflected herein as a result of future measurement period adjustments and the recording of identified intangible assets. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the BBI business and its customer base. Pro forma information is not presented, because the acquisition is not considered to be material, as defined by the SEC. The results of operations of BBI have been included in our results prospectively from the date of acquisition. Ziegler Wealth Management On March 19, 2018, the Company completed the acquisition of Ziegler Wealth Management (“Ziegler”), a privately held investment bank, capital markets and proprietary investments firm that had 55 private client advisors in five states that managed approximately $5 billion in client assets. Ziegler provided its clients with capital raising, strategic advisory services, equity and fixed income sales & trading and research. The acquisition was funded with cash from operations. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805 (“ASC Topic 805”), “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $19.0 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management and Institutional Group segments. Identifiable intangible assets purchased by our company consisted of customer relationships and non-compete agreements with an acquisition-date fair value of $9.5 million. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the Ziegler business and of the hired financial advisors and the conversion of the customer accounts to our platform. Goodwill is expected to be deductible for federal income tax purposes. Pro forma information is not presented, because the acquisition is not considered to be material, as defined by the SEC. The results of operations of Ziegler have been included in our results prospectively from the date of acquisition. City Securities Corporation On January 3, 2017, the Company completed the acquisition of City Financial Corporation and its wholly owned subsidiary, City Securities Corporation, (“City Securities”), an independent investment bank focused primarily on offering wealth management and public finance services across the Midwest. The acquisition was funded with cash from operations and our common stock. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805 (“ASC Topic 805”), “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $7.1 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management and Institutional Group segments. Identifiable intangible assets purchased by our company consisted of customer relationships with an acquisition-date fair value of $4.1 million. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the City Securities’ business and of the hired financial advisors and the conversion of the customer accounts to our platform. Goodwill is not expected to be deductible for federal income tax purposes. Pro forma information is not presented, because the acquisition is not considered to be material, as defined by the SEC. The results of operations of City Securities have been included in our results prospectively from the date of acquisition. ISM Capital LLP On May 3, 2016, the Company completed the acquisition of ISM Capital LLP (“ISM”), an independent investment bank focused on international debt capital markets. The acquisition of ISM adds to the Company’s debt capital markets origination, sales, and research capabilities in Europe, including an end-to-end platform for convertible securities and other equity-linked debt instruments. The acquisition was funded with cash from operations and our common stock, issued out of treasury. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805 (“ASC Topic 805”), “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $6.3 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Institutional Group segment. Identifiable intangible assets purchased by our company consisted of customer relationships, non-compete, and customer backlog with aggregate acquisition-date fair values of $2.3 million. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of ISM’s business and the addition of an end-to-end platform for convertible securities and other equity-linked debt instruments to our debt capital markets capabilities in Europe. Goodwill is not expected to be deductible for federal income tax purposes. We recognized a liability for estimated earn-out payments. These payments will be based on ISM’s performance over a three-year period. The liability for earn-out payments was $1.9 million at December 31, 2017. The contingent consideration accrual is included in accounts payable and accrued expenses in the consolidated statements of financial condition. There was no liability for earn-out payments at December 31, 2018. Eaton Partners On January 4, 2016, we completed the acquisition of Eaton Partners, LLC (“Eaton Partners”), a global fund placement and advisory firm. The acquisition was funded with cash from operations and our common stock, issued out of treasury. The acquisition was accounted for under the acquisition method of accounting in accordance with Topic 805. Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $72.0 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Institutional Group segment. Identifiable intangible assets purchased by our company consisted of customer relationships, trade name, non-compete, and customer backlog with aggregate acquisition-date fair values of $32.3 million. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of Eaton’s business and from the relationships Eaton has established with private equity firms, hedge funds, high net worth family offices, and institutional investors. Goodwill is deductible for federal income tax purposes. We recognized a liability for estimated earn-out payments. These payments will be based on Eaton Partner’s performance over a four-year period. The liability for earn-out payments was $40.2 million and $31.2 million at December 31, 2018 and 2017, respectively. The contingent consideration accrual is included in accounts payable and accrued expenses in the consolidated statements of financial condition. Barclays Wealth and Investment Management, Americas On December 4, 2015, we completed the purchase of the Barclays Wealth and Investment Management, Americas (“Barclays”), franchise in the U.S. The Company paid purchase consideration that was funded with cash from operations. As part of that transaction, Stifel Bancorp, a wholly owned subsidiary of the Company, acquired approximately $600.0 million of bank loans, at fair value, from Barclays. The fair values for those loans were estimated using discounted cash flow analyses using interest rates currently being offered for loans with similar terms. The acquisition was accounted for under the acquisition method of accounting in accordance with Topic 805. Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $24.8 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management segment. Identifiable intangible assets purchased by our company consisted of customer relationships, with acquisition-date fair value of $7.3 million. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the hired financial advisors and the conversion of the customer accounts to the Stifel platform. Goodwill is expected to be deductible for federal income tax purposes. In addition, deferred consideration is payable based on certain revenue generated by Stifel in accordance with the distribution agreement. The deferred consideration of $7.4 million and $15.2 million has been recognized as a liability and is included in accounts payable and accrued expenses in the consolidated statements of financial condition at December 31, 2018 and 2017, respectively. During 2016, the Company’s Board of Directors removed the continuing service requirements associated with restricted stock units that were granted to certain employees of Barclays in December 2015. As a result, the awards were expensed at date of modification resulting in a charge of $58.6 million during 2016. The fair value of the awards is based upon the closing price of our company’s common stock on the date of the grant of the awards. These charges are included in compensation and benefits in the consolidated statements of operations for the year ended December 31, 2016.

Receivables From And Payables T

Receivables From And Payables To Brokers, Dealers And Clearing Organizations	12 Months Ended
	Dec. 31, 2018
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables From And Payables To Brokers, Dealers And Clearing Organizations	Amounts receivable from brokers, dealers, and clearing organizations at December 31, 2018 and 2017, included (in thousands) December 31, 2018 2017 Receivables from clearing organizations $ 320,277 $ 270,285 Deposits paid for securities borrowed 109,795 132,776 Securities failed to deliver 85,502 56,046 $ 515,574 $ 459,107 Amounts payable to brokers, dealers, and clearing organizations at December 31, 2018 and 2017, included (in thousands) December 31, 2018 2017 Deposits received from securities loaned $ 392,163 $ 219,782 Securities failed to receive 27,975 29,297 Payable to clearing organizations 12,161 27,223 $ 432,299 $ 276,302 Deposits paid for securities borrowed approximate the market value of the securities. Securities failed to deliver and receive represent the contract value of securities that have not been delivered or received on settlement date.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	We measure certain financial assets and liabilities at fair value on a recurring basis, including financial instruments owned, available-for-sale securities, investments, financial instruments sold, but not yet purchased, and derivatives. We generally utilize third-party pricing services to value Level 1 and Level 2 available-for-sale investment securities, as well as certain derivatives designated as cash flow hedges. We review the methodologies and assumptions used by the third-party pricing services and evaluate the values provided, principally by comparison with other available market quotes for similar instruments and/or analysis based on internal models using available third-party market data. We may occasionally adjust certain values provided by the third-party pricing service when we believe, as the result of our review, that the adjusted price most appropriately reflects the fair value of the particular security. Following are descriptions of the valuation methodologies and key inputs used to measure financial assets and liabilities recorded at fair value. The descriptions include an indication of the level of the fair value hierarchy in which the assets or liabilities are classified. Financial Instruments Owned and Available-For-Sale Securities When available, the fair value of financial instruments is based on quoted prices in active markets and reported in Level 1. Level 1 financial instruments include highly liquid instruments with quoted prices, such as equity securities listed in active markets, U.S. government securities, U.S. government agency securities, corporate equity securities, and fixed income securities. If quoted prices are not available for identical instruments, fair values are obtained from pricing services, broker quotes, or other model-based valuation techniques with observable inputs, such as the present value of estimated cash flows, and reported as Level 2. The nature of these financial instruments include instruments for which quoted prices are available but traded less frequently, instruments whose fair value has been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed. Level 2 financial instruments include U.S. government agency securities, mortgage-backed securities, securities infrequently traded, including corporate fixed income securities, sovereign debt, and equity securities, state and municipal securities, and asset-backed securities, which primarily includes collateralized loan obligations. We have identified Level 3 financial instruments to include certain asset-backed and non-agency mortgage-backed securities. Level 3 financial instruments have little to no pricing observability as of the report date. These financial instruments do not have active two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation. Investments Investments carried at fair value primarily include corporate equity securities, auction-rate securities (“ARS”), and private company investments. Corporate equity securities that are valued based on quoted prices in active markets are reported in Level 1. ARS are valued based upon our expectations of issuer redemptions and using internal discounted cash flow models that utilize unobservable inputs. ARS are reported as Level 3 assets. Direct investments in private companies may be valued using the market approach and were valued based on an assessment of each underlying investment, incorporating evaluation of additional significant third-party financing, changes in valuations of comparable peer companies, the business environment of the companies, market indices, assumptions relating to appropriate risk adjustments for nonperformance, and legal restrictions on disposition, among other factors. The fair value derived from the methods used are evaluated and weighted, as appropriate, considering the reasonableness of the range of values indicated. Under the market approach, fair value may be determined by reference to multiples of market-comparable companies or transactions, including earnings before interest, taxes, depreciation, and amortization (“EBITDA”) multiples. For securities utilizing the market comparable companies valuation technique, a significant increase (decrease) in the EBITDA multiple in isolation could result in a significantly higher (lower) fair value measurement. Investments in Funds That Are Measured at Net Asset Value Per Share Investments at fair value include investments in funds, including certain money market funds that are measured at net asset value (“NAV”). The Company uses NAV to measure the fair value of its fund investments when (i) the fund investment does not have a readily determinable fair value and (ii) the NAV of the investment fund is calculated in a manner consistent with the measurement principles of investment company accounting, including measurement of the underlying investments at fair value. The Company’s investments in funds measured at NAV include private company investments, partnership interests, mutual funds, private equity funds, and money market funds. Private equity funds primarily invest in a broad range of industries worldwide in a variety of situations, including leveraged buyouts, recapitalizations, growth investments, and distressed investments. The private equity funds are primarily closed-end funds in which the Company’s investments are generally not eligible for redemption. Distributions will be received from these funds as the underlying assets are liquidated or distributed. The general and limited partnership interests in investment partnerships were primarily valued based upon NAVs received from third-party fund managers. The various partnerships are investment companies, which record their underlying investments at fair value based on fair value policies established by management of the underlying fund. Fair value policies at the underlying fund generally require the funds to utilize pricing/valuation information, including independent appraisals, from third-party sources. However, in some instances, current valuation information for illiquid securities or securities in markets that are not active may not be available from any third-party source or fund management may conclude that the valuations that are available from third-party sources are not reliable. In these instances, fund management may perform model-based analytical valuations that may be used as an input to value these investments. The tables below present the fair value of our investments in, and unfunded commitments to, funds that are measured at NAV (in thousands): December 31, 2018 December 31, 2017 Fair value of investments Unfunded commitments Fair value of investments Unfunded commitments Money market funds $ 19,719 $ — $ 77,441 $ — Mutual funds 9,122 — 11,748 — Private equity funds 3,461 1,480 7,677 1,825 Partnership interests 3,976 1,024 5,124 1,330 Total $ 36,278 $ 2,504 $ 101,990 $ 3,155 Financial Instruments Sold, But Not Yet Purchased Financial instruments sold, but not purchased, recorded at fair value based on quoted prices in active markets and other observable market data include highly liquid instruments with quoted prices, such as U.S. government securities, equity securities, and fixed income securities listed in active markets, which are reported as Level 1. If quoted prices are not available, fair values are obtained from pricing services, broker quotes, or other model-based valuation techniques with observable inputs, such as the present value of estimated cash flows, and reported as Level 2. The nature of these financial instruments include instruments for which quoted prices are available but traded less frequently, instruments whose fair value has been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed. Level 2 financial instruments include U.S. government agency securities, mortgage-backed securities not actively traded, corporate securities, including fixed income securities and equity securities, and sovereign debt. Derivatives Derivatives are valued using quoted market prices for identical instruments when available or pricing models based on the net present value of estimated future cash flows. The valuation models used require market observable inputs, including contractual terms, market prices, yield curves, credit curves, and measures of volatility. We manage credit risk for our derivative positions on a counterparty-by-counterparty basis and calculate credit valuation adjustments, included in the fair value of these instruments, on the basis of our relationships at the counterparty portfolio/master netting agreement level. These credit valuation adjustments are determined by applying a credit spread for the counterparty to the total expected exposure of the derivative after considering collateral and other master netting arrangements. We have classified our interest rate swaps as Level 2. Assets and liabilities measured at fair value on a recurring basis as of December 31, 2018, are presented below (in thousands) December 31, 2018 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 42,121 $ 42,121 $ — $ — U.S. government agency securities 72,532 — 72,532 — Mortgage-backed securities: Agency 564,111 — 564,111 — Non-agency 25,727 — 25,726 1 Asset-backed securities 25,905 — 25,730 175 Corporate securities: Fixed income securities 310,457 1,100 309,357 — Equity securities 57,911 57,125 786 — Sovereign debt 14,063 — 14,063 — State and municipal securities 154,622 — 154,622 — Total financial instruments owned 1,267,449 100,346 1,166,927 176 Available-for-sale securities: U.S. government agency securities 5,215 417 4,798 — State and municipal securities 68,226 — 68,226 — Mortgage-backed securities: Agency 230,408 — 230,408 — Commercial 69,715 — 69,715 — Non-agency 1,219 — 1,219 — Corporate fixed income securities 931,604 — 931,604 — Asset-backed securities 1,764,060 — 1,764,060 — Total available-for-sale securities 3,070,447 417 3,070,030 — Investments: Corporate equity securities 33,046 31,670 1,376 — Auction rate securities: Equity securities 16,632 — — 16,632 Municipal securities 704 — — 704 Other 1,041 — 184 857 Investments measured at NAV 16,559 Total investments 67,982 31,670 1,560 18,193 Cash equivalents measured at NAV 19,719 Derivative contracts (1) 7,683 — 7,683 — $ 4,433,280 $ 132,433 $ 4,246,200 $ 18,369 (1) Included in other assets in the consolidated statements of financial condition. December 31, 2018 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 534,817 $ 534,817 $ — $ — U.S. government agency securities 32,755 — 32,755 — Mortgage-backed securities: Agency 123,456 — 123,456 — Corporate securities: Fixed income securities 208,725 1,289 207,436 — Equity securities 36,117 35,398 719 — Sovereign debt 11,429 — 11,429 — State and municipal securities 7 — 7 — Total financial instruments sold, but not yet purchased $ 947,306 $ 571,504 $ 375,802 $ — Assets and liabilities measured at fair value on a recurring basis as of December 31, 2017, are presented below (in thousands) December 31, 2017 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 13,466 $ 13,466 $ — $ — U.S. government agency securities 147,223 — 147,223 — Mortgage-backed securities: Agency 302,445 — 302,445 — Non-agency 29,356 — 29,355 1 Asset-backed securities 76,752 — 76,395 357 Corporate securities: Fixed income securities 325,471 362 324,867 242 Equity securities 46,802 46,411 138 253 Sovereign debt 32,470 — 32,470 — State and municipal securities 169,699 — 169,699 — Total financial instruments owned 1,143,684 60,239 1,082,592 853 Available-for-sale securities: U.S. government agency securities 4,983 516 4,467 — State and municipal securities 70,559 — 70,559 — Mortgage-backed securities: Agency 305,530 — 305,530 — Commercial 72,488 — 72,488 — Non-agency 1,568 — 1,568 — Corporate fixed income securities 1,211,442 — 1,211,442 — Asset-backed securities 2,106,938 — 2,106,938 — Total available-for-sale securities 3,773,508 516 3,772,992 — Investments: Corporate equity securities 49,978 49,978 — — Auction rate securities: Equity securities 34,789 — — 34,789 Municipal securities 846 — — 846 Other 1,217 — 360 857 Investments measured at NAV 24,549 Total investments 111,379 49,978 360 36,492 Cash equivalents measured at NAV 77,441 Derivative contracts (1) 7,995 — 7,995 — $ 5,114,007 $ 110,733 $ 4,863,939 $ 37,345 (1) Included in other assets in the consolidated statements of financial condition. December 31, 2017 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 442,402 $ 442,402 $ — $ — U.S. government agency securities 10,348 — 10,348 — Mortgage-backed securities: Agency 86,612 — 86,612 — Corporate securities: Fixed income securities 180,755 — 180,755 — Equity securities 38,510 38,070 440 — Sovereign debt 20,236 — 20,236 — Total financial instruments sold, but not yet purchased $ 778,863 $ 480,472 $ 298,391 $ — The following tables summarize the changes in fair value associated with Level 3 financial instruments during the years ended December 31, 2018 and 2017 (in thousands) Year Ended December 31, 2018 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Asset-Backed Securities Fixed Income Securities Equity Securities Auction Rate Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2017 $ 1 $ 357 $ 242 $ 253 $ 34,789 $ 846 $ 857 Unrealized gains/(losses): Included in changes in net assets (1) — (164 ) — (130 ) 1,193 8 — Realized gains (1) — — — 21 — — — Purchases — — — — — — — Sales — — — (144 ) — — — Redemptions — (18 ) (242 ) — (19,350 ) (150 ) — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — — — — — Net change — (182 ) (242 ) (253 ) (18,157 ) (142 ) — Balance at December 31, 2018 $ 1 $ 175 $ — $ — $ 16,632 $ 704 $ 857 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. Year Ended December 31, 2017 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Corporate Fixed Income Securities Equity Securities Corporate Equity Securities Auction Rate Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2016 $ 1,082 $ 273 $ 600 $ 3,833 $ 48,689 $ 832 $ 1,240 Unrealized gains/(losses): Included in changes in net assets (1) (260 ) — (88 ) (133 ) 785 14 — Realized gains/(losses) (1) 90 — (259 ) 13 — — (383 ) Purchases — — — — — — — Sales (324 ) — — (120 ) — — — Redemptions (230 ) (31 ) — — — — — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — (3,593 ) (14,685 ) — — Net change (724 ) (31 ) (347 ) (3,833 ) (13,900 ) 14 (383 ) Balance at December 31, 2017 $ 358 $ 242 $ 253 $ — $ 34,789 $ 846 $ 857 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. The results included in the table above are only a component of the overall investment strategies of our company. The table above does not present Level 1 or Level 2 valued assets or liabilities. The changes to our company’s Level 3 classified instruments during the year ended December 31, 2018 were principally a result of the redemption of ARS. The changes in unrealized gains/(losses) recorded in earnings for the year ended December 31, 2018, relating to Level 3 assets still held at December 31, 2018, were immaterial. The following table summarizes quantitative information related to the significant unobservable inputs utilized in our company’s Level 3 recurring fair value measurements as of December 31, 2018. Valuation technique Unobservable input Range Weighted average Investments: Auction rate securities: Equity securities Discounted cash flow Discount rate 0.0% - 5.6% 3.2% Workout period 2-3 years 2.4 years Municipal securities Discounted cash flow Discount rate 0.7% - 8.3% 2.8% Workout period 1-4 years 2.0 years The fair value of certain Level 3 assets was determined using various methodologies, as appropriate, including third-party pricing vendors and broker quotes. These inputs are evaluated for reasonableness through various procedures, including due diligence reviews of third-party pricing vendors, variance analyses, consideration of current market environment, and other analytical procedures. The fair value for our auction rate securities was determined using an income approach based on an internally developed discounted cash flow model. The discounted cash flow model utilizes two significant unobservable inputs: discount rate and workout period. The discount rate was calculated using credit spreads of the underlying collateral or similar securities. The workout period was based on an assessment of publicly available information on efforts to re-establish functioning markets for these securities and our company’s own redemption experience. Significant increases in any of these inputs in isolation would result in a significantly lower fair value. On an ongoing basis, management verifies the fair value by reviewing the appropriateness of the discounted cash flow model and its significant inputs. Transfers Within the Fair Value Hierarchy We assess our financial instruments on a quarterly basis to determine the appropriate classification within the fair value hierarchy. Transfers between fair value classifications occur when there are changes in pricing observability levels. Transfers of financial instruments among the levels are deemed to occur at the beginning of the reporting period. There were $0.9 million of transfers of financial assets from Level 2 to Level 1 during the year ended December 31, 2018, corporate fixed income securities for which market trades were observed that provided transparency into the valuation of these assets. There were $0.8 million of transfers of financial assets from Level 1 to Level 2 during the year ended December 31, 2018, primarily related to corporate fixed income securities for which there were low volumes of recent trade activity observed. There were no transfers of financial assets into or out of Level 3 during the year ended December 31, 2018. Fair Value of Financial Instruments The following reflects the fair value of financial instruments as of December 31, 2018 and 2017, whether or not recognized in the consolidated statements of financial condition at fair value (in thousands) December 31, 2018 December 31, 2017 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 1,936,560 $ 1,936,560 $ 696,283 $ 696,283 Cash segregated for regulatory purposes 132,814 132,814 90,802 90,802 Securities purchased under agreements to resell 699,900 699,900 512,220 512,220 Financial instruments owned 1,267,449 1,267,449 1,143,684 1,143,684 Available-for-sale securities 3,070,447 3,070,447 3,773,508 3,773,508 Held-to-maturity securities 4,218,854 4,122,907 3,698,098 3,710,478 Loans held for sale 205,557 205,557 226,068 226,068 Bank loans 8,517,615 8,565,347 6,947,759 6,953,328 Investments 67,982 67,982 111,379 111,379 Derivative contracts (1) 7,683 7,683 7,995 7,995 Financial liabilities: Securities sold under agreements to repurchase $ 535,394 $ 535,394 $ 233,704 $ 233,704 Bank deposits 15,863,613 14,661,996 13,411,935 12,702,746 Financial instruments sold, but not yet purchased 947,306 947,306 778,863 778,863 Federal Home Loan Bank advances 540,000 540,000 745,000 745,000 Borrowings 180,655 180,655 256,000 256,000 Senior notes 1,015,973 989,790 1,014,940 1,044,768 Debentures to Stifel Financial Capital Trusts 60,000 49,747 67,500 64,962 (1) The following table presents the estimated fair values of financial instruments not measured at fair value on a recurring basis for the periods indicated (in thousands) December 31, 2018 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,916,841 $ 1,916,841 $ — $ — Cash segregated for regulatory purposes 132,814 132,814 — — Securities purchased under agreements to resell 699,900 645,632 54,268 — Held-to-maturity securities 4,122,907 — 3,960,099 162,808 Loans held for sale 205,557 — 205,557 — Bank loans 8,565,347 — 8,565,347 — Financial liabilities: Securities sold under agreements to repurchase $ 535,394 $ 87,273 $ 448,121 $ — Bank deposits 14,661,996 — 14,661,996 — Federal Home Loan Bank advances 540,000 540,000 — — Borrowings 180,655 180,655 — — Senior notes 989,790 989,790 — — Debentures to Stifel Financial Capital Trusts 49,747 — — 49,747 December 31, 2017 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 618,842 $ 618,842 $ — $ — Cash segregated for regulatory purposes 90,802 90,802 — — Securities purchased under agreements to resell 512,220 428,740 83,480 — Held-to-maturity securities 3,710,478 — 3,517,781 192,697 Loans held for sale 226,068 — 226,068 — Bank loans 6,953,328 — 6,953,328 — Financial liabilities: Securities sold under agreements to repurchase $ 233,704 $ 92,278 $ 141,426 $ — Bank deposits 12,702,746 — 12,702,746 — Federal Home Loan Bank advances 745,000 745,000 — — Borrowings 256,000 256,000 — — Senior notes 1,044,768 1,044,768 — — Debentures to Stifel Financial Capital Trusts 64,962 — — 64,962 The following, as supplemented by the discussion above, describes the valuation techniques used in estimating the fair value of our financial instruments as of December 31, 2018 and 2017. Financial Assets Securities Purchased Under Agreements to Resell Securities purchased under agreements to resell are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. The carrying values at December 31, 2018 and 2017 approximate fair value due to their short-term nature. Held-to-Maturity Securities Securities held to maturity are recorded at amortized cost based on our company’s positive intent and ability to hold these securities to maturity. Securities held to maturity include agency, commercial, and non-agency mortgage-backed securities, asset-backed securities, consisting of collateralized loan obligation securities and Student Loan ARS, and corporate fixed income securities. The estimated fair value, included in the above table, is determined using several factors; however, primary weight is given to discounted cash flow modeling techniques that incorporated an estimated discount rate based upon recent observable debt security issuances with similar characteristics. Loans Held for Sale Loans held for sale consist of fixed-rate and adjustable-rate residential real estate loans intended for sale. Loans held for sale are stated at lower of cost or fair value. Fair value is determined based on prevailing market prices for loans with similar characteristics or on sale contract prices. Bank Loans The fair values of mortgage loans and commercial loans were estimated using a discounted cash flow method, a form of the income approach. Discount rates were determined considering rates at which similar portfolios of loans would be made under current conditions and considering liquidity spreads applicable to each loan portfolio based on the secondary market. Financial Liabilities Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. The carrying values at December 31, 2018 and 2017 approximate fair value due to the short-term nature. Bank Deposits The fair value for demand deposits is equal to the amount payable on demand at the reporting date (that is, their carrying amounts). The carrying amounts of variable-rate money-market and savings accounts approximate their fair values at the reporting date as these are short-term in nature. The fair value of other interest-bearing deposits, including certificates of deposit, was calculated by discounting the future cash flows using discount rates based on the expected current market rates for similar products with similar remaining terms. Borrowings The carrying amount of borrowings approximates fair value due to the relative short-term nature of such borrowings. In addition, Stifel Bancorp’s Federal Home Loan Bank advances reflect terms that approximate current market rates for similar borrowings. Senior Notes The fair value of our senior notes is estimated based upon quoted market prices. Debentures to Stifel Financial Capital Trusts The fair value of our trust preferred securities is based on the discounted value of contractual cash flows. We have assumed a discount rate based on similar type debt instruments. These fair value disclosures represent our best estimates based on relevant market information and information about the financial instruments. Fair value estimates are based on judgments regarding future expected losses, current economic conditions, risk characteristics of the various instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in the above methodologies and assumptions could significantly affect the estimates.

Financial Instruments Owned And

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased	The components of financial instruments owned and financial instruments sold, but not yet purchased, at December 31, 2018 and 2017, are as follows (in thousands) December 31, 2018 2017 Financial instruments owned: U.S. government securities $ 42,121 $ 13,466 U.S. government agency securities 72,532 147,223 Mortgage-backed securities: Agency 564,111 302,445 Non-agency 25,727 29,356 Asset-backed securities 25,905 76,752 Corporate securities: Fixed income securities 310,457 325,471 Equity securities 57,911 46,802 Sovereign debt 14,063 32,470 State and municipal securities 154,622 169,699 $ 1,267,449 $ 1,143,684 Financial instruments sold, but not yet purchased: U.S. government securities $ 534,817 $ 442,402 U.S. government agency securities 32,755 10,348 Mortgage-backed securities: Agency 123,456 86,612 Corporate securities: Fixed income securities 208,725 180,755 Equity securities 36,117 38,510 Sovereign debt 11,429 20,236 State and municipal securities 7 — $ 947,306 $ 778,863 At December 31, 2018 and 2017, financial instruments owned in the amount of $669.0 million and $810.3 million, respectively, were pledged as collateral (on a settlement-date basis) for our repurchase agreements and short-term borrowings. Our financial instruments owned are presented on a trade-date basis in the consolidated statements of financial condition. Financial instruments sold, but not yet purchased, represent obligations of our company to deliver the specified security at the contracted price, thereby creating a liability to purchase the security in the market at prevailing prices in future periods. We are obligated to acquire the securities sold short at prevailing market prices in future periods, which may exceed the amount reflected in the consolidated statements of financial condition.

Available-For-Sale And Held-To-

Available-For-Sale And Held-To-Maturity Securities	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Available-For-Sale And Held-To-Maturity Securities	The following tables provide a summary of the amortized cost and fair values of the available-for-sale securities and held-to-maturity securities at December 31, 2018 and 2017 (in thousands) December 31, 2018 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,237 $ 13 $ (35 ) $ 5,215 State and municipal securities 72,487 — (4,261 ) 68,226 Mortgage-backed securities: Agency 234,292 88 (3,972 ) 230,408 Commercial 74,411 4 (4,700 ) 69,715 Non-agency 1,245 — (26 ) 1,219 Corporate fixed income securities 958,406 — (26,802 ) 931,604 Asset-backed securities 1,779,496 672 (16,108 ) 1,764,060 $ 3,125,574 $ 777 $ (55,904 ) $ 3,070,447 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,198,442 $ 1,307 $ (31,689 ) $ 1,168,060 Commercial 51,524 185 — 51,709 Asset-backed securities 2,968,888 4,585 (70,335 ) 2,903,138 $ 4,218,854 $ 6,077 $ (102,024 ) $ 4,122,907 December 31, 2017 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,022 $ — $ (39 ) $ 4,983 State and municipal securities 74,691 — (4,132 ) 70,559 Mortgage-backed securities: Agency 308,409 102 (2,981 ) 305,530 Commercial 75,548 28 (3,088 ) 72,488 Non-agency 1,568 — — 1,568 Corporate fixed income securities 1,213,262 3,832 (5,652 ) 1,211,442 Asset-backed securities 2,098,958 12,877 (4,897 ) 2,106,938 $ 3,777,458 $ 16,839 $ (20,789 ) $ 3,773,508 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,334,833 $ 13,621 $ (16,208 ) $ 1,332,246 Commercial 58,971 1,313 — 60,284 Asset-backed securities 2,264,283 15,526 (1,862 ) 2,277,947 Corporate fixed income securities 40,011 27 (37 ) 40,001 $ 3,698,098 $ 30,487 $ (18,107 ) $ 3,710,478 (1) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss. (2) Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements. For the year ended December 31, 2018, we received proceeds of $372.4 million from the sale of available for sale securities, which resulted in a realized loss of $3.9 million. For the year ended December 31, 2017, we received proceeds of $87.3 million from the sale of available for sale securities, which resulted in realized gains of $0.4 million. For the year ended December 31, 2016, there were no sales of available-for-sale securities. During the year ended December 31, 2018, unrealized losses, net of deferred taxes, of $36.3 million were recorded in accumulated other comprehensive loss in the consolidated statements of financial condition. During the years ended December 31, 2017 and 2016, unrealized gains, net of deferred tax expense, of $4.7 million and $5.8 million, respectively, were recorded in accumulated other comprehensive loss in the consolidated statements of financial condition. The table below summarizes the amortized cost and fair values of debt securities by contractual maturity (in thousands) December 31, 2018 Available-for-sale securities Held-to-maturity securities Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Debt securities Within one year $ 5,872 $ 5,855 $ — $ — After one year through three years 233,969 227,818 — — After three years through five years 406,184 396,046 — — After five years through ten years 463,765 452,622 366,667 364,758 After ten years 1,705,836 1,686,764 2,602,221 2,538,380 Mortgage-backed securities After one year through three years 132 133 51,524 51,709 After three years through five years 1,323 1,326 — — After five years through ten years 5,801 5,820 170,050 165,858 After ten years 302,692 294,063 1,028,392 1,002,202 $ 3,125,574 $ 3,070,447 $ 4,218,854 $ 4,122,907 The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at December 31, 2018, are as follows (in thousands) Within 1 Year 1-5 Years 5-10 Years After 10 Years Total Available-for-sale: (1) U.S. government agency securities $ 1,534 $ 3,681 $ — $ — $ 5,215 State and municipal securities 80 — 18,199 49,947 68,226 Mortgage-backed securities: Agency — 1,460 5,820 223,128 230,408 Commercial — — — 69,715 69,715 Non-agency — — — 1,219 1,219 Corporate fixed income securities 4,241 620,182 307,181 — 931,604 Asset-backed securities — — 127,242 1,636,818 1,764,060 $ 5,855 $ 625,323 $ 458,442 $ 1,980,827 $ 3,070,447 Held-to-maturity: Mortgage-backed securities: Agency $ — $ — $ 170,050 $ 1,028,392 $ 1,198,442 Commercial — 51,524 — — 51,524 Asset-backed securities — — 366,667 2,602,221 2,968,888 $ — $ 51,524 $ 536,717 $ 3,630,613 $ 4,218,854 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis. At December 31, 2018 and 2017, securities of $1.9 billion and $2.2 billion, respectively, were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. At December 31, 2018 and 2017, securities of $1.6 billion and $2.0 billion, respectively, were pledged with the Federal Reserve discount window. The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at December 31, 2018 (in thousands) Less than 12 months 12 months or more Total Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Available-for-sale securities U.S. government securities $ (35 ) $ 3,752 — — $ (35 ) $ 3,752 State and municipal securities — — (4,261 ) 68,146 (4,261 ) 68,146 Mortgage-backed securities: Agency (186 ) 16,124 (3,786 ) 188,069 (3,972 ) 204,193 Commercial — — (4,700 ) 68,850 (4,700 ) 68,850 Non-agency (26 ) 1,214 — — (26 ) 1,214 Corporate fixed income securities (5,619 ) 351,344 (21,183 ) 580,260 (26,802 ) 931,604 Asset-backed securities (16,108 ) 1,348,927 — — (16,108 ) 1,348,927 $ (21,974 ) $ 1,721,361 $ (33,930 ) $ 905,325 $ (55,904 ) $ 2,626,686 Held-to-maturity securities Mortgage-backed securities: Agency $ (3,511 ) $ 311,010 $ (28,178 ) $ 714,949 $ (31,689 ) $ 1,025,959 Asset-backed securities (68,308 ) 2,579,117 (2,027 ) 42,712 (70,335 ) 2,621,829 $ (71,819 ) $ 2,890,127 $ (30,205 ) $ 757,661 $ (102,024 ) $ 3,647,788 At December 31, 2018, the amortized cost of 258 securities classified as available for sale exceeded their fair value by $55.9 million, of which $33.9 million related to investment securities that had been in a loss position for 12 months or longer. The total fair value of these investments at December 31, 2018, was $2.6 billion, which was 85.5% of our available-for-sale portfolio. At December 31, 2018, the carrying value of 196 securities held to maturity exceeded their fair value by $102.0 million, of which $30.2 million related to securities held to maturity that have been in a loss position for 12 months or longer. As discussed in more detail below, we conduct periodic reviews of all securities with unrealized losses to assess whether the impairment is other-than-temporary. Other-Than-Temporary Impairment We evaluate all securities in an unrealized loss position quarterly to assess whether the impairment is other-than-temporary. Our OTTI assessment is a subjective process requiring the use of judgments and assumptions. There was no credit-related OTTI recognized during the years ended December 31, 2018, 2017, and 2016. We believe the gross unrealized losses of $157.9 million related to our investment portfolio, as of December 31, 2018, are attributable to changes in market interest rates. We, therefore, do not expect to incur any credit losses related to these securities. In addition, we have no intent to sell these securities with unrealized losses, and it is not more likely than not that we will be required to sell these securities prior to recovery of the amortized cost. Accordingly, we have concluded that the impairment on these securities is not other-than-temporary.

Bank Loans

Bank Loans	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Bank Loans	The following table presents the balance and associated percentage of each major loan category in our bank loan portfolio at December 31, 2018 and 2017 (in thousands, except percentages) December 31, 2018 December 31, 2017 Balance Percent Balance Percent Commercial and industrial $ 3,304,234 38.5 % $ 2,437,938 34.8 % Residential real estate 2,875,014 33.5 2,593,576 37.0 Securities-based loans 1,786,966 20.8 1,819,206 25.9 Commercial real estate 318,961 3.7 116,258 1.7 Construction and land 138,245 1.6 7,896 0.1 Home equity lines of credit 38,098 0.4 15,039 0.2 Other 120,129 1.5 24,508 0.3 Gross bank loans 8,581,647 100.0 % 7,014,421 100.0 % Unamortized loan premium/(discount), net (12,155 ) 788 Loans in process 27,984 (856 ) Unamortized loan fees, net 5,972 872 Allowance for loan losses (85,833 ) (67,466 ) Bank loans, net $ 8,517,615 $ 6,947,759 At December 31, 2018 and 2017, Stifel Bancorp had loans outstanding to its executive officers, directors, and their affiliates in the amount of $4.0 million, respectively, and loans outstanding to other Stifel Financial Corp. executive officers, directors, and their affiliates in the amount of $24.8 million and $8.4 million, respectively. At December 31, 2018 and 2017, we had loans held for sale of $205.6 million and $226.1 million, respectively. For the years ended December 31, 2018, 2017, and 2016, we recognized gains, included in other income in the consolidated statements of operations, of $ 8.2 At December 31, 2018 and 2017, residential and commercial real estate loans of $2.7 billion and $2.4 billion, respectively, were pledged at the Federal Home Loan Bank as collateral for borrowings. The following table details activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2018 and 2017 (in thousands) Year Ended December 31, 2018 Beginning Balance Provision Charge- offs Recoveries Ending Balance Commercial and industrial $ 54,474 $ 13,896 $ (12 ) $ 9 $ 68,367 Residential real estate 8,430 2,798 — — 11,228 Securities-based loans 2,088 (110 ) — — 1,978 Commercial real estate 1,520 258 — — 1,778 Construction and land 100 1,141 — — 1,241 Home equity lines of credit 162 145 — 3 310 Other 16 71 (2 ) 3 88 Qualitative 676 167 — — 843 $ 67,466 $ 18,366 $ (14 ) $ 15 $ 85,833 Year Ended December 31, 2017 Beginning Balance Provision Charge- offs Recoveries Ending Balance Commercial and industrial $ 35,127 $ 19,666 $ (355 ) $ 36 $ 54,474 Residential real estate 2,660 5,770 — — 8,430 Securities-based loans 3,094 (1,006 ) — — 2,088 Commercial real estate 1,363 2,860 (2,703 ) — 1,520 Home equity lines of credit 371 (212 ) — 3 162 Construction and land 232 (132 ) — — 100 Other 129 (115 ) — 2 16 Qualitative 2,187 (1,511 ) — — 676 $ 45,163 $ 25,320 $ (3,058 ) $ 41 $ 67,466 The following table presents the unpaid principal balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at December 31, 2018 (in thousands) Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial and industrial $ 8,678 $ 59,689 $ 68,367 $ 23,677 $ 3,280,557 $ 3,304,234 Residential real estate 24 11,204 11,228 519 2,874,495 2,875,014 Securities-based loans — 1,978 1,978 — 1,786,966 1,786,966 Commercial real estate — 1,778 1,778 — 318,961 318,961 Construction and land — 1,241 1,241 — 138,245 138,245 Home equity lines of credit — 310 310 184 37,914 38,098 Other 1 87 88 21 120,108 120,129 Qualitative — 843 843 — — — $ 8,703 $ 77,130 $ 85,833 $ 24,401 $ 8,557,246 $ 8,581,647 The following table presents the unpaid principal balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at December 31, 2017 (in thousands) Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Residential real estate $ 24 $ 8,406 $ 8,430 $ 171 $ 2,593,405 $ 2,593,576 Commercial and industrial 9,059 45,415 54,474 28,856 2,409,082 2,437,938 Securities-based loans — 2,088 2,088 — 1,819,206 1,819,206 Commercial real estate — 1,520 1,520 — 116,258 116,258 Home equity lines of credit 20 142 162 184 14,855 15,039 Construction and land — 100 100 — 7,896 7,896 Other 2 14 16 2 24,506 24,508 Qualitative — 676 676 — — — $ 9,105 $ 58,361 $ 67,466 $ 29,213 $ 6,985,208 $ 7,014,421 In determining the amount of our allowance, we rely on an analysis of our loan portfolio, our experience, and our evaluation of general economic conditions. If our assumptions prove to be incorrect, our current allowance may not be sufficient to cover future loan losses and we may experience significant increases to our provision. There are two components of the allowance for loan losses: the inherent allowance component and the specific allowance component. The inherent allowance component of the allowance for loan losses is used to estimate the probable losses inherent in the loan portfolio and includes non-homogeneous loans that have not been identified as impaired and portfolios of smaller balance homogeneous loans. Our company maintains methodologies by loan product for calculating an allowance for loan losses that estimates the inherent losses in the loan portfolio. Qualitative and environmental factors, such as economic and business conditions, nature and volume of the portfolio and lending terms, and volume and severity of past due loans may also be considered in the calculations. The allowance for loan losses is maintained at a level reasonable to ensure that it can adequately absorb the estimated probable losses inherent in the portfolio. The specific allowance component of the allowance for loan losses is used to estimate probable losses for non-homogeneous exposures, including loans modified in a Troubled Debt Restructuring (TDR), which have been specifically identified for impairment analysis by our company and determined to be impaired. At December 31, 2018, we had $24.4 million of impaired loans, net of discounts, which included $9.1 million in troubled debt restructurings. The specific allowance on impaired loans at December 31, 2018 was $8.7 million. At December 31, 2017, we had $29.2 million of impaired loans, net of discounts, which included $9.1 million in troubled debt restructurings. The specific allowance on impaired loans at December 31, 2017 was $9.1 million. The gross interest income related to impaired loans, which would have been recorded had these loans been current in accordance with their original terms, and the interest income recognized on these loans during the year ended December 31, 2018 and 2017, were insignificant to the consolidated financial statements. The tables below present loans that were individually evaluated for impairment by portfolio segment at December 31, 2018 and 2017, including the average recorded investment balance (in thousands) December 31, 2018 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 23,677 $ 242 $ 23,435 $ 23,677 $ 8,678 $ 23,807 Residential real estate 544 352 167 519 24 275 Home equity lines of credit 184 184 — 184 — 184 Other 694 11 10 21 1 70 Total $ 25,099 $ 789 $ 23,612 $ 24,401 $ 8,703 $ 24,336 December 31, 2017 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 28,856 $ 5,211 $ 23,645 $ 28,856 $ 9,059 $ 30,277 Home equity lines of credit 184 — 184 184 20 300 Residential real estate 171 — 171 171 24 174 Other 677 — 2 2 2 5 Total $ 29,888 $ 5,211 $ 24,002 $ 29,213 $ 9,105 $ 30,756 The following tables present the aging of the recorded investment in past due loans at December 31, 2018 and 2017, by portfolio segment (in thousands) December 31, 2018 30-89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ — $ 14,656 $ 14,656 $ 3,289,578 3,304,234 Residential real estate 6,970 377 7,347 2,867,667 2,875,014 Securities-based loans — — — 1,786,966 1,786,966 Commercial real estate — — — 318,961 318,961 Construction and land — — — 138,245 138,245 Home equity lines of credit 33 — 33 38,065 38,098 Other — 134 134 119,995 120,129 Total $ 7,003 $ 15,167 $ 22,170 $ 8,559,477 $ 8,581,647 December 31, 2018 * Non-accrual Restructured Total Commercial and industrial $ 14,741 $ 8,936 $ 23,677 Residential real estate 352 167 519 Home equity lines of credit 184 — 184 Other 21 — 21 Total $ 15,298 $ 9,103 $ 24,401 * There were no loans past due 90 days and still accruing interest at December 31, 2018. December 31, 2017 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Residential real estate $ 7,892 $ — $ 7,892 $ 2,585,684 2,593,576 Commercial and industrial 11,883 — 11,883 2,426,055 2,437,938 Securities-based loans — — — 1,819,206 1,819,206 Commercial real estate — — — 116,258 116,258 Home equity lines of credit 184 — 184 14,855 15,039 Construction and land — — — 7,896 7,896 Other 2 — 2 24,506 24,508 Total $ 19,961 $ — $ 19,961 $ 6,994,460 $ 7,014,421 December 31, 2017 * Non-accrual Restructured Total Commercial and industrial $ 19,904 $ 8,952 $ 28,856 Home equity lines of credit 184 — 184 Residential real estate — 171 171 Other 2 — 2 Total $ 20,090 $ 9,123 $ 29,213 * There were no loans past due 90 days and still accruing interest at December 31, 2017. Credit quality indicators As of December 31, 2018, bank loans were primarily extended to non-investment-grade borrowers. Substantially all of these loans align with the U.S. federal bank regulatory agencies’ definition of Pass. Loans meet the definition of Pass when they are performing and/or do not demonstrate adverse characteristics that are likely to result in a credit loss. A loan is determined to be impaired when principal or interest becomes 90 days past due or when collection becomes uncertain. At the time a loan is determined to be impaired, the accrual of interest and amortization of deferred loan origination fees is discontinued (non-accrual status), and any accrued and unpaid interest income is reversed. We closely monitor economic conditions and loan performance trends to manage and evaluate our exposure to credit risk. Trends in delinquency ratios are an indicator, among other considerations, of credit risk within our loan portfolios. The level of nonperforming assets represents another indicator of the potential for future credit losses. Accordingly, key metrics we track and use in evaluating the credit quality of our loan portfolio include delinquency and nonperforming asset rates, as well as charge-off rates and our internal risk ratings of the loan portfolio. In general, we are a secured lender. At December 31, 2018 and 2017, 98.4% and 97.2% of our loan portfolio was collateralized, respectively. Collateral is required in accordance with the normal credit evaluation process based upon the creditworthiness of the customer and the credit risk associated with the particular transaction. Our company uses the following definitions for risk ratings: Pass . A credit exposure rated pass has a continued expectation of timely repayment, all obligations of the borrower are current, and the obligor complies with material terms and conditions of the lending agreement. Special Mention . Extensions of credit that have potential weakness that deserve management’s close attention and, if left uncorrected, may, at some future date, result in the deterioration of the repayment prospects or collateral position. Substandard . Obligor has a well-defined weakness that jeopardizes the repayment of the debt and has a high probability of payment default with the distinct possibility that we will sustain some loss if noted deficiencies are not corrected. Doubtful . Inherent weakness in the exposure makes the collection or repayment in full, based on existing facts, conditions, and circumstances, highly improbable, and the amount of loss is uncertain. Doubtful loans are considered impaired. Substandard loans are regularly reviewed for impairment. When a loan is impaired, the impairment is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, or as a practical expedient, the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent. Portfolio segments: Real Estate . Real estate loans include commercial real estate, residential real estate non-conforming loans, residential real estate conforming loans and home equity lines of credit. The allowance methodology related to real estate loans considers several factors, including, but not limited to, loan-to-value ratio, FICO score, home price index, delinquency status, credit limits, and utilization rates. Commercial and industrial (“C&I”). C&I loans primarily include commercial and industrial lending used for general corporate purposes, working capital and liquidity, and “event-driven." “Event-driven” loans support client merger, acquisition or recapitalization activities. C&I lending is structured as revolving lines of credit, letter of credit facilities, term loans and bridge loans. Risk factors considered in determining the allowance for corporate loans include the borrower’s financial strength, seniority of the loan, collateral type, leverage, volatility of collateral value, debt cushion, and covenants. Securities-based loans . Securities-based loans allow clients to borrow money against the value of qualifying securities for any suitable purpose other than purchasing, trading, or carrying securities or refinancing margin debt. The majority of consumer loans are structured as revolving lines of credit and letter of credit facilities and are primarily offered through Stifel’s Pledged Asset ("SPA") program. The allowance methodology for securities-based lending considers the collateral type underlying the loan, including the liquidity and trading volume of the collateral, position concentration and other borrower specific factors such as personal guarantees. Construction and land . Short-term loans used to finance the development of a real estate project. Other. Other loans includes consumer, credit card, and indirect lending. Based on the most recent analysis performed, the risk category of our loan portfolio was as follows: (in thousands) December 31, 2018 Pass Special Mention Substandard Doubtful Total Commercial and industrial $ 3,254,698 $ 34,795 $ 14,741 $ — $ 3,304,234 Residential real estate 2,874,495 — 519 — 2,875,014 Securities-based loans 1,786,966 — — — 1,786,966 Commercial real estate 318,961 — — — 318,961 Construction and land 138,245 — — — 138,245 Home equity lines of credit 37,914 — 184 — 38,098 Other 119,912 196 — 21 120,129 Total $ 8,531,191 $ 34,991 $ 15,444 $ 21 $ 8,581,647 December 31, 2017 Pass Special Mention Substandard Doubtful Total Residential real estate $ 2,593,096 $ 309 $ 171 $ — 2,593,576 Commercial and industrial 2,385,152 22,443 30,343 — 2,437,938 Securities-based loans 1,819,206 — — — 1,819,206 Commercial real estate 116,258 — — — 116,258 Home equity lines of credit 14,855 — 184 — 15,039 Construction and land 7,896 — — — 7,896 Other 24,506 — 2 — 24,508 Total $ 6,960,969 $ 22,752 $ 30,700 $ — $ 7,014,421

Fixed Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Fixed Assets	The following is a summary of fixed assets as of December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 Furniture and equipment $ 251,542 $ 225,553 Aircraft operating leases 214,065 — Building and leasehold improvements 180,743 168,684 646,350 394,237 Less accumulated depreciation and amortization (273,411 ) (239,117 ) $ 372,939 $ 155,120 For the years ended December 31, 2018, 2017, and 2016, depreciation and amortization totaled $27.9 million, $32.5 million, and $43.1 million, respectively. As of December 31, 2018, the Company had a total lease portfolio of 23 aircraft engines with a net book value of $211.1 million. The aircraft engines were purchased by the Company, through its subsidiaries, during 2018. See Notes 2 and 28 for addition information. As of December 31, 2018, minimum future payments under non-cancelable leases were (in thousands) 2019 $ 19,417 2020 15,813 2021 12,877 2022 6,614 2023 3,040 Thereafter 4,565 $ 62,326

Goodwill And Intangible Assets

Goodwill And Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill And Intangible Assets	The carrying amount of goodwill and intangible assets attributable to each of our reporting segments is presented in the following table (in thousands) December 31, 2017 Net Additions Write-off December 31, 2018 Goodwill Global Wealth Management $ 276,477 $ 63,918 $ — $ 340,395 Institutional Group 692,357 1,927 — 694,284 $ 968,834 $ 65,845 $ — $ 1,034,679 December 31, 2017 Net Additions Amortization December 31, 2018 Intangible assets Global Wealth Management $ 44,525 $ 21,780 $ (5,773 ) $ 60,532 Institutional Group 65,102 805 (6,784 ) 59,123 $ 109,627 $ 22,585 $ (12,557 ) $ 119,655 On March 19, 2018, the Company completed the acquisition of Ziegler. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $19.0 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management and Institutional Group segments. Identifiable intangible assets purchased by our company consisted of customer relationships and non-compete agreements with an acquisition-date fair value of $9.5 million. See Note 3 in the notes to our consolidated financial statements for additional information regarding the acquisition of Ziegler. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the Ziegler business and of the hired financial advisors and the conversion of the customer accounts to our platform. Goodwill is expected to be deductible for federal income tax purposes. On August 31, 2018, the Company completed the acquisition of BBI. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $38.4 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management segment. Identifiable intangible assets purchased by our company consisted of core deposits with an acquisition-date fair value of $8.6 million. The allocation of the purchase price of BBI is preliminary and will be finalized upon completion of the analysis of the fair values of the net assets of BBI as of the acquisition date and the identified intangible assets. The final goodwill recorded on the consolidated statement of financial condition may differ from that reflected herein as a result of future measurement period adjustments and the recording of identified intangible assets. See Note 3 in the notes to our consolidated financial statements for additional information regarding the acquisition of BBI. On October 1, 2018, the Company completed the acquisition of Rand. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, “Business Combinations.” Accordingly, goodwill was measured as the excess of the acquisition-date fair value of the consideration transferred over the amount of acquisition-date identifiable assets acquired net of assumed liabilities. We recorded $8.3 million of goodwill in the consolidated statement of financial condition, which has been allocated to our company’s Global Wealth Management segment. Identifiable intangible assets purchased by our company consisted of customer relationships with an acquisition-date fair value of $4.6 million. The allocation of the purchase price of Rand is preliminary and will be finalized upon completion of the analysis of the fair values of the net assets of Rand as of the acquisition date and the identified intangible assets. The final goodwill recorded on the consolidated statement of financial condition may differ from that reflected herein as a result of future measurement period adjustments and the recording of identified intangible assets. See Note 3 in the notes to our consolidated financial statements for additional information regarding the acquisition of Rand. The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of the Rand business and of the hired financial advisors and the conversion of the customer accounts to our platform. Goodwill is expected to be deductible for federal income tax purposes. Amortizable intangible assets consist of acquired customer relationships, trade name, core deposits investment banking backlog, and non-compete agreements that are amortized over their contractual or determined useful lives. Intangible assets subject to amortization as of December 31, 2018 and 2017 were as follows (in thousands) December 31, 2018 December 31, 2017 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 160,745 $ 65,254 $ 146,986 $ 55,809 Trade name 24,713 11,755 24,713 10,228 Core deposits 8,615 816 — — Non-compete agreements 2,603 1,452 2,598 1,202 Investment banking backlog 1,431 1,293 1,419 968 $ 198,107 $ 80,570 $ 175,716 $ 68,207 Amortization expense related to intangible assets was $12.6 million, $12.1 million, and $14.4 million for the years ended December 31, 2018, 2017, and 2016, respectively, and is included in other operating expenses in the consolidated statements of operations.. The weighted-average remaining lives of the following intangible assets at December 31, 2018, are: customer relationships, 10.5 years; trade name, 9.6 years; core deposits, 4.9 years; and non-compete agreements, 8.8 years. We have an intangible asset that is not subject to amortization and is, therefore, not included in the table below. As of December 31, 2018, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year 2019 $ 13,737 2020 13,164 2021 12,310 2022 11,494 2023 10,673 Thereafter 56,159 $ 117,537

Borrowings and Federal Home Loa

Borrowings and Federal Home Loan Bank Advances	12 Months Ended
	Dec. 31, 2018
Short Term Debt Other Disclosures [Abstract]
Borrowings and Federal Home Loan Bank Advances	Our short-term financing is generally obtained through short-term bank line financing on an uncommitted, secured basis, advances from the Federal Home Loan Bank, and securities lending arrangements. We borrow from various banks on a demand basis with company-owned and customer securities pledged as collateral. The value of customer-owned securities used as collateral is not reflected in the consolidated statements of financial condition. We also have an unsecured, committed bank line available. Our uncommitted secured lines of credit at December 31, 2018, totaled $1.0 billion with six banks and are dependent on having appropriate collateral, as determined by the bank agreements, to secure an advance under the line. The availability of our uncommitted lines is subject to approval by the individual banks each time an advance is requested and may be denied. Our peak daily borrowing on our uncommitted secured lines was $391.0 million during the year ended December 31, 2018. There are no compensating balance requirements under these arrangements. Any borrowings on secured lines of credit are generally utilized to finance certain fixed income securities. At December 31, 2018, our uncommitted secured lines of credit of $56.0 million are included in borrowings in the consolidated statements of financial condition. Our uncommitted secured lines were collateralized by company-owned securities valued at $63.0 million at December 31, 2018. The Federal Home Loan advances of $540.0 million as of December 31, 2018, are floating-rate advances. The weighted average interest rates on these advances during the year ended December 31, 2018, was 1.61%. The advances are secured by Stifel Bancorp’s residential mortgage loan portfolio and investment portfolio. The interest rates reset on a daily basis. Stifel Bancorp has the option to prepay these advances without penalty on the interest reset date. Our committed bank line financing at December 31, 2018, consisted of a $200.0 million revolving credit facility. The credit facility expires in March 2020. The applicable interest rate under the revolving credit facility is calculated as a per annum rate equal to the London Interbank Offered Rate (“LIBOR”) plus 2.00%, as defined in the revolving credit facility. At December 31, 2018, we had no advances on our revolving credit facility and were in compliance with all covenants. In June 2018, Stifel, our broker-dealer subsidiary, entered into a 364-day Credit Agreement (“Stifel Credit Facility”) with a maturity date of June 2019 in which the lenders are a number of financial institutions. This committed unsecured borrowing facility provides for maximum borrowings of up to $250.0 million at variable rates of interest. At December 31, 2018, we had no advances on the Stifel Credit Facility and were in compliance with all covenants. As of December 31, 2018, a subsidiary of Stifel Bancorp was a party to two Notes. The Notes mature in 2043. The Notes bear interest contractually at fixed rates as per the Note Purchase Agreement. The outstanding balance on the Notes at December 31, 2018 was $124.5 million and is included in borrowings in the consolidated statements of financial condition.

Senior Notes

Senior Notes	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Senior Notes	The following table summarizes our senior notes as of December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 4.250% senior notes, due 2024 (1) $ 500,000 $ 500,000 3.50% senior notes, due 2020 (2) 300,000 300,000 5.20% senior notes, due 2047 (3) 225,000 225,000 1,025,000 1,025,000 Debt issuance costs, net (9,027 ) (10,060 ) Senior notes, net $ 1,015,973 $ 1,014,940 ( 1) In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.250% senior notes due July 2024. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. In July 2016, we issued an additional $200.0 million in aggregate principal amount of 4.25% senior notes due 2024. (2) In December 2015, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 3.50% senior notes due December 2020. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. (3) Our senior notes mature as follows, based upon contractual terms (in thousands) 2019 $ — 2020 300,000 2021 — 2022 — 2023 — Thereafter 725,000 $ 1,025,000

Bank Deposits

Bank Deposits	12 Months Ended
	Dec. 31, 2018
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Bank Deposits	Deposits consist of money market and savings accounts, certificates of deposit, and demand deposits. Deposits at December 31, 2018 and 2017 were as follows (in thousands) December 31, 2018 2017 Money market and savings accounts $ 13,609,612 $ 13,219,675 Certificates of deposit 1,763,336 1,575 Demand deposits (interest-bearing) 392,765 184,829 Demand deposits (non-interest-bearing) 97,900 5,856 $ 15,863,613 $ 13,411,935 The weighted-average interest rate on deposits was 0.60% and 0.10% at December 31, 2018 and 2017, respectively. Scheduled maturities of certificates of deposit at December 31, 2018 and 2017 were as follows (in thousands) December 31, 2018 2017 Certificates of deposit, less than $100,000: Within one year $ 27,440 $ 438 One to three years 38,550 148 Three to five years 15,511 — $ 81,501 $ 586 Certificates of deposit, $100,000 and greater: Within one year $ 1,513,202 $ 651 One to three years 157,232 338 Three to five years 11,401 — 1,681,835 989 $ 1,763,336 $ 1,575 At December 31, 2018 and 2017, the amount of deposits includes related party deposits, primarily brokerage customers’ deposits from Stifel of $15.2 billion and $13.4 billion, respectively, and interest-bearing and time deposits of executive officers, directors, and their affiliates of $6.5 million and $0.2 million, respectively.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	12 Months Ended
	Dec. 31, 2018
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Derivative Instruments And Hedging Activities	We use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps generally involve the exchange of fixed and variable rate interest payments between two parties, based on a common notional principal amount and maturity date with no exchange of underlying principal amounts. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for our company making fixed payments. Our policy is not to offset fair value amounts recognized for derivative instruments and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from derivative instruments recognized at fair value executed with the same counterparty under master netting arrangements. The following table provides the notional values and fair values of our derivative instruments as of December 31, 2018 and 2017 (in thousands) December 31, 2018 Asset Derivatives Notional Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments under Topic 815: Cash flow interest rate contracts $ 540,000 Other assets $ 7,683 December 31, 2017 Asset Derivatives Notional Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments under Topic 815: Cash flow interest rate contracts $ 540,000 Other assets $ 7,995 Cash Flow Hedges We have entered into interest rate swap agreements that effectively modify our exposure to interest rate risk by converting floating rate debt to a fixed rate debt. The swaps have an average remaining life of 1.1 years. Any unrealized gains or losses related to cash flow hedging instruments are reclassified from accumulated other comprehensive loss into earnings in the same period the hedged forecasted transaction affects earnings and are recorded in interest expense in the consolidated statements of operations. The ineffective portion of the cash flow hedging instruments is recorded in other income or other operating expense in the consolidated statements of operations. Amounts reported in accumulated other comprehensive loss related to derivatives will be reclassified to interest expense as interest payments are made on our variable rate deposits. During the next twelve months, we estimate that $3.9 million will be reclassified as an increase to interest expense. The following table shows the effect of our company’s derivative instruments in the consolidated statements of operations for the years ended December 31, 2018, 2017, and 2016 (in thousands) Year Ended December 31, 2018 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Gain/(Loss) Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ (3,876 ) Interest Expense $ 4,947 Interest Expense $ — Year Ended December 31, 2017 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Gain/(Loss) Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 1,085 Interest Expense $ (635 ) Interest Expense $ — Year Ended December 31, 2016 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Gain/(Loss) Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 6,383 Interest expense $ (5,444 ) Interest expense $ 30 We maintain a risk management strategy that incorporates the use of derivative instruments to minimize significant unplanned fluctuations in earnings caused by interest rate volatility. Our goal is to manage sensitivity to changes in rates by hedging the maturity characteristics of variable rate affiliated deposits, thereby limiting the impact on earnings. By using derivative instruments, we are exposed to credit and market risk on those derivative positions. We manage the market risk associated with interest rate contracts by establishing and monitoring limits as to the types and degree of risk that may be undertaken. Credit risk is equal to the extent of the fair value gain in a derivative if the counterparty fails to perform. When the fair value of a derivative contract is positive, this generally indicates that the counterparty owes our company and, therefore, creates a repayment risk for our company. When the fair value of a derivative contract is negative, we owe the counterparty and, therefore, have no repayment risk. See Note 5 in the notes to our consolidated financial statements for further discussion on how we determine the fair value of our financial instruments. We minimize the credit (or repayment) risk in derivative instruments by entering into transactions with high-quality counterparties that are reviewed periodically by senior management. Credit Risk-Related Contingency Features We have agreements with our derivative counterparties containing provisions where if we default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then we could also be declared in default on our derivative obligations. We have agreements with certain of our derivative counterparties that contain provisions where if our shareholders’ equity declines below a specified threshold or if we fail to maintain a specified minimum shareholders’ equity, then we could be declared in default on our derivative obligations. Certain of our agreements with our derivative counterparties contain provisions where if a specified event or condition occurs that materially changes our creditworthiness in an adverse manner, we may be required to fully collateralize our obligations under the derivative instrument. Regulatory Capital-Related Contingency Features Certain of our derivative instruments contain provisions that require us to maintain our capital adequacy requirements. If we were to lose our status as “adequately capitalized,” we would be in violation of those provisions, and the counterparties of the derivative instruments could request immediate payment or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. Counterparty Risk In the event of counterparty default, our economic loss may be higher than the uncollateralized exposure of our derivatives if we were not able to replace the defaulted derivatives in a timely fashion. We monitor the risk that our uncollateralized exposure to each of our counterparties for interest rate swaps will increase under certain adverse market conditions by performing periodic market stress tests. These tests evaluate the potential additional uncollateralized exposure we would have to each of these derivative counterparties assuming changes in the level of market rates over a brief time period.

Debentures To Stifel Financial

Debentures To Stifel Financial Capital Trusts	12 Months Ended
	Dec. 31, 2018
Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust [Abstract]
Debentures To Stifel Financial Capital Trusts	The following table summarizes our debentures to Stifel Financial Capital Trusts as of December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 Debenture to Stifel Financial Capital Trust II (1) $ 20,000 $ 20,000 Debenture to Stifel Financial Capital Trust III (2) 35,000 35,000 Debenture to Stifel Financial Capital Trust IV (3) 5,000 12,500 $ 60,000 $ 67,500 (1) On August 12, 2005, we completed a private placement of $35.0 million of 6.38% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust II (the “Trust II”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 30, 2035, but may be redeemed by our company, and in turn, the Trust II would call the debenture beginning September 30, 2010. The Trust II requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.70% per annum. During 2016, we extinguished $15.0 million of the Trust II debentures. (2) On March 30, 2007, we completed a private placement of $35.0 million of 6.79% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust III (the “Trust III”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on June 6, 2037, but may be redeemed by our company, and in turn, Trust III would call the debenture beginning June 6, 2012. Trust III requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum. (3) On June 28, 2007, we completed a private placement of $35.0 million of 6.78% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust IV (the “Trust IV”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 6, 2037, but may be redeemed by our company, and in turn, Trust IV would call the debenture beginning September 6, 2012. Trust IV requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum.

Disclosures About Offsetting As

Disclosures About Offsetting Assets And Liabilities	12 Months Ended
	Dec. 31, 2018
Offsetting [Abstract]
Disclosures About Offsetting Assets And Liabilities	The following table provides information about financial assets and derivative assets that are subject to offset as of December 31, 2018 and 2017 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Assets Gross Amounts Offset in the of Financial Condition Net Amounts Presented in the Statement of Financial Condition Amounts available for offset Available collateral Net Amount As of December 31, 2018: Securities borrowing (1) $ 109,795 $ — $ 109,795 $ (57,328 ) $ (45,005 ) $ 7,462 Reverse repurchase agreements (2) 699,900 — 699,900 (365,822 ) (329,740 ) 4,338 Cash flow interest rate contracts 7,683 — 7,683 — — 7,683 $ 817,378 $ — $ 817,378 $ (423,150 ) $ (374,745 ) $ 19,483 As of December 31, 2017: Securities borrowing (1) $ 132,776 $ — $ 132,776 $ (78,474 ) $ (37,248 ) $ 17,054 Reverse repurchase agreements (2) 512,220 — 512,220 (233,624 ) (266,008 ) 12,588 Cash flow interest rate contracts 7,995 — 7,995 — — 7,995 $ 652,991 $ — $ 652,991 $ (312,098 ) $ (303,256 ) $ 37,637 (1) Securities borrowing transactions are included in receivables from brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 4 in the notes to consolidated financial statements for additional information on receivables from brokers, dealers, and clearing organizations. (2) Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively. The following table provides information about financial liabilities and derivative liabilities that are subject to offset as of December 31, 2018 and 2017 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts Presented in the Statement of Financial Condition Amounts available for offset Collateral Pledged Net Amount As of December 31, 2018: Securities lending (3) $ (392,163 ) $ — $ (392,163 ) $ 57,328 $ 325,110 $ (9,725 ) Repurchase agreements (4) (535,394 ) — (535,394 ) 365,822 169,572 — $ (927,557 ) $ — $ (927,557 ) $ 423,150 $ 494,682 $ (9,725 ) As of December 31, 2017: Securities lending (3) $ (219,782 ) $ — $ (219,782 ) $ 78,474 $ 133,772 $ (7,536 ) Repurchase agreements (4) (233,704 ) — (233,704 ) 233,624 80 — $ (453,486 ) $ — $ (453,486 ) $ 312,098 $ 133,852 $ (7,536 ) (3) Securities lending transactions are included in payables to brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 4 in the notes to consolidated financial statements for additional information on payables to brokers, dealers, and clearing organizations. (4) Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Commitments, Guarantees, And Co

Commitments, Guarantees, And Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments, Guarantees, And Contingencies	Broker-Dealer Commitments and Guarantees In the normal course of business, we enter into underwriting commitments. Settlement of transactions relating to such underwriting commitments, which were open at December 31, 2018, had no material effect on the consolidated financial statements. We also provide guarantees to securities clearinghouses and exchanges under their standard membership agreement, which requires members to guarantee the performance of other members. Under the agreement, if another member becomes unable to satisfy its obligations to the clearinghouse, other members would be required to meet shortfalls. Our liability under these agreements is not quantifiable and may exceed the cash and securities we have posted as collateral. However, the potential requirement for us to make payments under these arrangements is considered remote. Accordingly, no liability has been recognized for these arrangements. Other Commitments In the ordinary course of business, Stifel Bancorp has commitments to extend credit in the form of commitments to originate loans, standby letters of credit, and lines of credit. See Note 23 in the notes to consolidated financial statements for further details. We have committed capital to certain entities, and these commitments generally have no specified call dates. We had $2.5 million of commitments outstanding at December 31, 2018. Concentration of Credit Risk We provide investment, capital-raising, and related services to a diverse group of domestic customers, including governments, corporations, and institutional and individual investors. Our exposure to credit risk associated with the non-performance of customers in fulfilling their contractual obligations pursuant to securities transactions can be directly impacted by volatile securities markets, credit markets, and regulatory changes. This exposure is measured on an individual customer basis and on a group basis for customers that share similar attributes. To reduce the potential for risk concentrations, counterparty credit limits have been implemented for certain products and are continually monitored in light of changing customer and market conditions. As of December 31, 2018 and 2017, we did not have significant concentrations of credit risk with any one customer or counterparty, or any group of customers or counterparties. Operating Leases Future minimum commitments under non-cancelable operating leases at December 31, 2018, are as follows (in thousands) 2019 $ 89,887 2020 81,899 2021 66,887 2022 59,353 2023 50,916 Thereafter 107,678 $ 456,620 Certain leases contain provisions for renewal options and escalation clauses based on increases in certain costs incurred by the lessor. We amortize office lease incentives and rent escalation on a straight-line basis over the life of the lease. Rent expense for the years ended December 31, 2018, 2017, and 2016, included in occupancy and equipment rental in the consolidated statements of operations, was $104.6 million, $104.5 million, and $108.7 million, net of sublease income.

Legal Proceedings

Legal Proceedings	12 Months Ended
	Dec. 31, 2018
Loss Contingency Information About Litigation Matters [Abstract]
Legal Proceedings	Our company and its subsidiaries are named in and subject to various proceedings and claims arising primarily from our securities business activities, including lawsuits, arbitration claims, class actions, and regulatory matters. Some of these claims seek substantial compensatory, punitive, or indeterminate damages. Our company and its subsidiaries are also involved in other reviews, investigations, and proceedings by governmental and self-regulatory organizations regarding our business, which may result in adverse judgments, settlements, fines, penalties, injunctions, and other relief. We are contesting allegations in these claims, and we believe that there are meritorious defenses in each of these lawsuits, arbitrations, and regulatory investigations. In view of the number and diversity of claims against our company, the number of jurisdictions in which litigation is pending, and the inherent difficulty of predicting the outcome of litigation and other claims, we cannot state with certainty what the eventual outcome of pending litigation or other claims will be. We have established reserves for potential losses that are probable and reasonably estimable that may result from pending and potential legal actions, investigations, and regulatory proceedings. In many cases, however, it is inherently difficult to determine whether any loss is probable or reasonably possible or to estimate the amount or range of any potential loss, particularly where proceedings may be in relatively early stages or where plaintiffs are seeking substantial or indeterminate damages. Matters frequently need to be more developed before a loss or range of loss can reasonably be estimated. In our opinion, based on currently available information, review with outside legal counsel, and consideration of amounts provided for in our consolidated financial statements with respect to these matters the ultimate resolution of these matters will not have a material adverse impact on our financial position and results of operations. However, resolution of one or more of these matters may have a material effect on the results of operations in any future period, depending upon the ultimate resolution of those matters and depending upon the level of income for such period. For matters where a reserve has not been established and for which we believe a loss is reasonably possible, as well as for matters where a reserve has been recorded but for which an exposure to loss in excess of the amount accrued is reasonably possible, based on currently available information, we believe that such losses will not have a material effect on our consolidated financial statements.

Regulatory Capital Requirements

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	We operate in a highly regulated environment and are subject to capital requirements, which may limit distributions to our company from its subsidiaries. Distributions from our broker-dealer subsidiaries are subject to net capital rules. A broker-dealer that fails to comply with the SEC’s Uniform Net Capital Rule (Rule 15c3-1) may be subject to disciplinary actions by the SEC and self-regulatory organizations, such as FINRA, including censures, fines, suspension, or expulsion. Stifel has chosen to calculate its net capital under the alternative method, which prescribes that their net capital shall not be less than the greater of $1.0 million or two percent of aggregate debit balances (primarily receivables from customers) computed in accordance with the SEC’s Customer Protection Rule (Rule 15c3-3). Our other broker-dealer subsidiaries calculate their net capital under the aggregate indebtedness method, whereby their aggregate indebtedness may not be greater than fifteen times their net capital (as defined). At December 31, 2018, Stifel had net capital of $342.7 million, which was 20.9% of aggregate debit items and $310.0 million in excess of its minimum required net capital. At December 31, 2018, all of our other broker-dealer subsidiaries’ net capital exceeded the minimum net capital required under the SEC rule. Our international subsidiary is subject to the regulatory supervision and requirements of the Financial Conduct Authority (“FCA”) in the United Kingdom. At December 31, 2018, our international subsidiary’s capital and reserves were in excess of the financial resources requirement under the rules of the FCA. Our company, as a bank holding company, Stifel Bank & Trust, and Stifel Bank (“bank subsidiaries”) are subject to various regulatory capital requirements administered by the Federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our company’s and its bank subsidiaries’ financial results. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, our company and its bank subsidiaries must meet specific capital guidelines that involve quantitative measures of our assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. Our company’s and its bank subsidiaries’ capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Under the Basel III rules, the quantity and quality of regulatory capital increases, a capital conservation buffer was established, selected changes were made to the calculation of risk-weighted assets, and a new ratio, common equity Tier 1 was introduced, all of which are applicable to both our company and its bank subsidiaries’. Various aspects of Basel III will be subject to multi-year transition periods through December 31, 2018. Our company and its bank subsidiaries are required to maintain minimum amounts and ratios of Total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), Tier 1 capital to average assets (as defined), and under rules defined in Basel III, Common equity Tier 1 capital to risk-weighted assets. Our company and its bank subsidiaries each calculate these ratios in order to assess compliance with both regulatory requirements and their internal capital policies. At current capital levels, our company and its bank subsidiaries are each categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” our company and its bank subsidiaries must maintain total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the tables below (in thousands, except ratios) Stifel Financial Corp. – Federal Reserve Capital Amounts December 31, 2018 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,939,938 16.8 % $ 520,718 4.5 % $ 752,148 6.5 % Tier 1 capital 2,103,339 18.2 % 694,291 6.0 % 925,721 8.0 % Total capital 2,247,937 19.4 % 925,721 8.0 % 1,157,152 10.0 % Tier 1 leverage 2,103,339 9.3 % 904,735 4.0 % 1,130,919 5.0 % Stifel Bank & Trust – Federal Reserve Capital Amounts December 31, 2018 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,163,514 14.4 % $ 363,956 4.5 % $ 525,714 6.5 % Tier 1 capital 1,176,915 14.6 % 485,274 6.0 % 647,032 8.0 % Total capital 1,262,361 15.6 % 647,032 8.0 % 808,790 10.0 % Tier 1 leverage 1,176,915 7.1 % 658,602 4.0 % 823,252 5.0 % Stifel Bank– Federal Reserve Capital Amounts December 31, 2018 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 77,244 12.3 % $ 28,324 4.5 % $ 40,913 6.5 % Tier 1 capital 77,244 12.3 % 37,766 6.0 % 50,354 8.0 % Total capital 85,117 13.5 % 50,354 8.0 % 62,943 10.0 % Tier 1 leverage 77,244 9.9 % 31,113 4.0 % 38,892 5.0 %

Revenues from Contracts with Cu

Revenues from Contracts with Customers	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenues from Contracts with Customers	NOTE 20 – Revenues from Contracts with Customers The following table presents the Company’s total revenues separated between revenues from contracts with customers and other sources of revenues for the year ended December 31, 2018 (in thousands): Year Ended December 31, 2018 Revenues from contracts with customers: Commissions $ 657,732 Investment banking 707,670 Asset management and service fees 806,175 Other 15,568 Total revenue from contracts with customers 2,187,145 Other sources of revenue: Interest 646,449 Principal transactions 351,378 Other 9,985 Total revenues $ 3,194,957 Revenue from contracts with customers is recognized when, or as, we satisfy our performance obligations by transferring the promised goods or services to the customers. A good or service is transferred to a customer when, or as, the customer obtains control of that good or service. A performance obligation may be satisfied over time or at a point in time. Revenue from a performance obligation satisfied over time is recognized by measuring our progress in satisfying the performance obligation in a manner that depicts the transfer of the goods or services to the customer. Revenue from a performance obligation satisfied at a point in time is recognized at the point in time that we determine the customer obtains control over the promised good or service. The amount of revenue recognized reflects the consideration we expect to be entitled to in exchange for those promised goods or services (i.e., the “transaction price”). In determining the transaction price, we consider multiple factors, including the effects of variable consideration. Variable consideration is included in the transaction price only to the extent it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainties with respect to the amount are resolved. In determining when to include variable consideration in the transaction price, we consider the range of possible outcomes, the predictive value of our past experiences, the time period of when uncertainties expect to be resolved and the amount of consideration that is susceptible to factors outside of our influence, such as market volatility or the judgment and actions of third parties. The following provides detailed information on the recognition of our revenues from contracts with customers: Commissions. We earn commission revenue by executing, settling, and clearing transactions for clients primarily in OTC and listed equity securities, insurance products, and options. Trade execution and clearing and custody services, when provided together, represent a single performance obligation as the services are not separately identifiable in the context of the contract. Commission revenues associated with combined trade execution and clearing and custody services, as well as trade execution services on a standalone basis, are recognized at a point in time on trade-date. Commission revenues are generally paid on settlement date and we record a receivable between trade-date and payment on settlement date. Investment Banking. We provide our clients with a full range of capital markets and financial advisory services. Capital markets services include underwriting and placement agent services in both the equity and debt capital markets, including private equity placements, initial public offerings, follow-on offerings, underwriting and distributing public and private debt. Capital raising revenues are recognized at a point in time on trade-date, as the client obtains the control and benefit of the capital markets offering at that point. Costs associated with capital raising transactions are deferred until the related revenue is recognized or the engagement is otherwise concluded, and are recorded on a gross basis within other operating expenses in the consolidated statements of operations as we are acting as a principal in the arrangement. Any expenses reimbursed by our clients are recognized as investment banking revenues. Revenues from financial advisory services primarily consist of fees generated in connection with merger, acquisition and restructuring transactions. Advisory fees from mergers and acquisitions engagements are recognized at a point in time when the related transaction is completed, as the performance obligation is to successfully broker a specific transaction. Fees received prior to the completion of the transaction are deferred within accounts payable and accrued expenses on the consolidated statements of financial condition. Advisory fees from restructuring engagements are recognized over time using a time elapsed measure of progress as our clients simultaneously receive and consume the benefits of those services as they are provided. A significant portion of the fees we receive for our advisory services are considered variable as they are contingent upon a future event (e.g., completion of a transaction or third party emergence from bankruptcy) and are excluded from the transaction price until the uncertainty associated with the variable consideration is subsequently resolved, which is expected to occur upon achievement of the specified milestone. Payment for advisory services are generally due promptly upon completion of a specified milestone or, for retainer fees, periodically over the course of the engagement. We recognize a receivable between the date of completion of the milestone and payment by the customer. Expenses associated with investment banking advisory engagements are deferred only to the extent they are explicitly reimbursable by the client and the related revenue is recognized upon completion of services. All other investment banking advisory related expenses, including expenses incurred related to restructuring assignments, are expensed as incurred. All investment banking advisory expenses are recognized within other operating expenses in the consolidated statements of operations and any expenses reimbursed by our clients are recognized as investment banking revenues. Asset Management Fees. We earn management and performance fees in connection with investment advisory services provided to institutional and individual clients. Investment advisory fees are charged based on the value of assets in fee-based accounts and are affected by changes in the balances of client assets due to market fluctuations and levels of net new client assets. Fees are charged either in advance based on fixed rates applied to the value of the customers’ account at the beginning of the period or periodically based on contracted rates and account performance. Contracts can be terminated at any time with no incremental payments due to our company upon termination. If the contract is terminated by the customer fees are prorated for the period and fees charged for the post termination period are refundable to the customer. Disaggregation of Revenue The following tables present the Company’s revenues from contracts with customers by reportable segment disaggregated by major business activity and primary geographic regions for the year ended December 31, 2018 (in thousands) Year Ended December 31, 2018 Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 472,135 $ 185,597 $ — $ 657,732 Investment banking - capital raising 31,293 304,895 — 336,188 Investment banking - advisory fees 81 371,401 — 371,482 Asset management 806,132 43 — 806,175 Other 11,625 — 3,943 15,568 Total 1,321,266 861,936 3,943 2,187,145 Primary Geographic Region: United States 1,321,266 725,251 3,943 2,050,460 Europe — 130,979 — 130,979 Other — 5,706 — 5,706 $ 1,321,266 $ 861,936 $ 3,943 $ 2,187,145 See Note 25 for further break-out of revenues by geography. Information on Remaining Performance Obligations and Revenue Recognized from Past Performance We do not disclose information about remaining performance obligations pertaining to contracts that have an original expected duration of one year or less. The transaction price allocated to remaining unsatisfied or partially unsatisfied performance obligations with an original expected duration exceeding one year was not material at December 31, 2018. Investment banking advisory fees that are contingent upon completion of a specific milestone and fees associated with certain distribution services are also excluded as the fees are considered variable and not included in the transaction price at December 31, 2018. Contract Balances The timing of our revenue recognition may differ from the timing of payment by our customers. We record a receivable when revenue is recognized prior to payment and we have an unconditional right to payment. Alternatively, when payment precedes the provision of the related services, we record deferred revenue until the performance obligations are satisfied. We had receivables related to revenues from contracts with customers of $116.7 million and $93.0 million at December 31, 2018 and December 31, 2017, respectively, in other assets in the consolidated statements of financial condition. We had no significant impairments related to these receivables during the year ended December 31, 2018. Our deferred revenue primarily relates to retainer fees received in investment banking advisory engagements where the performance obligation has not yet been satisfied. Deferred revenue at December 31, 2018 was $9.5 million and included in accounts payable and accrued expenses in the consolidated statements of financial condition.

Interest Income And Interest Ex

Interest Income And Interest Expense	12 Months Ended
	Dec. 31, 2018
Banking And Thrift Interest [Abstract]
Interest Income And Interest Expense	The components of interest income and interest expense are as follows (in thousands) Year Ended December 31, 2018 2017 2016 Interest income: Bank loans, net $ 300,541 $ 206,084 $ 127,923 Investment securities 252,200 187,731 107,454 Margin balances 49,515 37,218 32,147 Financial instruments owned 21,407 17,563 18,965 Other 22,786 5,785 7,843 $ 646,449 $ 454,381 $ 294,332 Interest expense: Bank deposits $ 82,256 $ 12,661 $ 7,331 Senior notes 44,610 35,338 36,217 Federal Home Loan Bank advances 15,173 8,305 6,777 Other 28,037 13,726 16,549 $ 170,076 $ 70,030 $ 66,874

Employee Incentive, Deferred Co

Employee Incentive, Deferred Compensation, And Retirement Plans	12 Months Ended
	Dec. 31, 2018
Share Based Compensation Allocation And Classification In Financial Statements [Abstract]
Employee Incentive, Deferred Compensation, And Retirement Plans	We maintain several incentive stock award plans that provide for the granting of stock options, stock appreciation rights, restricted stock, performance award, stock units, and debentures to our employees. We are permitted to issue new shares under all stock award plans approved by shareholders or to reissue our treasury shares. Awards under our company’s incentive stock award plans are granted at market value at the date of grant. The awards generally vest ratably over a one- to ten-year vesting period. All stock-based compensation plans are administered by the Compensation Committee of the Board of Directors (“Compensation Committee”), which has the authority to interpret the plans, determine to whom awards may be granted under the plans, and determine the terms of each award. According to these plans, we are authorized to grant an additional 5.2 million shares at December 31, 2018. Stock-based compensation expense included in compensation and benefits in the consolidated statements of operations for our company’s incentive stock award plans was $111.8 million, $246.7 million, and $190.1 million for the years ended December 31, 2018, 2017, and 2016, respectively. The tax benefit related to stock-based compensation recognized in shareholders’ equity was $4.0 million for the year ended December 31, 2018. As a result of the adoption of a new accounting standard on January 1, 2017, we recognized an excess tax benefit from stock-based compensation of $64.7 million for the year ended December 31, 2017. We adopted the new guidance prospectively. The tax provision related to stock-based compensation recognized in shareholders’ equity was $4.9 million for the year ended December 31, 2016. In response to the Tax Legislation that was enacted in December 2017, the Company offered certain employees the opportunity to participate in the conversion of certain restricted stock units into restricted stock pursuant to a Modification Award Agreement. Under the terms of the Modification Award Agreement, vesting of certain restricted stock will no longer be contingent upon continued employment but rather will vest so long as the employee is not engaged in certain competitive or soliciting activities as provided in the Wealth Accumulation Plan (the “Plan”). The conversion through acceptance of the Modification Agreement by the participating employees resulted in a charge of $55.9 million, which is included in compensation and benefits in the consolidated statement of operations for the year ended December 31, 2017. The fair value of these awards was based upon the closing price of our company’s common stock on the date of the grant of the awards. In December 2017, the Company accelerated the vesting of certain outstanding debenture awards, resulting in a charge of $51.4 million, which is included in compensation and benefits in the consolidated statement of operations for the year ended December 31, 2017. During 2016, the Company’s Board of Directors removed the continuing service requirements associated with restricted stock units that were granted to certain employees of Barclays in December 2015. As a result of the modification, the awards were expensed at date of modification, resulting in a charge of $58.6 million during 2016. The fair value of the awards is based upon the closing price of our company’s common stock on the date of the grant of the awards. These charges are included in compensation and benefits in the consolidated statements of operations for the year ended December 31, 2016. Stock Options We have substantially eliminated the use of stock options as a form of compensation. During the year ended December 31, 2018, no options were granted. The total intrinsic value of options exercised during the years ended December 31, 2018, 2017 and 2016 were not material. Cash proceeds from the exercise of stock options were not material for the years ended December 31, 2018, 2017, and 2016. Restricted Stock Units and Restricted Stock Awards A restricted stock unit represents the right to receive a share of common stock from our company at a designated time in the future without cash payment by the employee and is issued in lieu of cash incentive, principally for deferred compensation and employee retention plans. The restricted stock units vest on an annual basis over the next one to ten years and are distributable, if vested, at future specified dates. Restricted stock awards are restricted as to sale or disposition. These restrictions lapse over the next one to five years. Our company grants Performance-based Restricted Stock Units (“PRSUs”) to its executive officers. Under the terms of the grants, the number of PRSUs that will vest and convert to shares will be based on our company's achievement of the pre-determined performance objectives during the performance period. The PRSUs will be measured over a four-year performance period and vested over a five-year period. The number of shares converted has the potential to range from 0% to 200% based on how our company performs during the performance period. Compensation expense is amortized on a straight-line basis over the service period based on the fair value of the award on the grant date. The Company’s pre-determined performance objectives must be met for the awards to vest. Employees forfeit unvested share units upon termination of employment with a corresponding reversal of compensation expense. At December 31, 2018, the total number of restricted stock units and restricted stock awards outstanding was 16.4 million, of which 14.1 million were unvested. At December 31, 2018, the total number of PRSU’s was 0.7 million, of which all were unvested. A summary of unvested restricted equity award activity, which includes restricted stock units and restricted stock awards, for the year ended December 31, 2018 is presented below (in thousands, except weighted-average fair value) Units Weighted-average grant date fair value Unvested December 31, 2017 13,938 $ 44.31 Granted 2,496 55.94 Vested (2,030 ) 41.18 Cancelled (287 ) 47.98 Unvested December 31, 2018 14,117 $ 46.75 At December 31, 2018, there was approximately $297.4 million of unrecognized compensation cost for restricted stock units and restricted stock, which is expected to be recognized over a weighted-average period of 2.8 years. The fair value of restricted stock units and restricted stock that vested or converted during the year ended December 31, 2018, was $83.6 million. Deferred Compensation Plans The Wealth Accumulation Plan (the “Plan”) is provided to certain revenue producers, officers, and key administrative employees, whereby a certain percentage of their incentive compensation is deferred as defined by the Plan into company stock units and debentures. Participants may elect to defer a portion of their incentive compensation. Deferred awards generally vest over a one- to ten-year period and are distributable upon vesting or at future specified dates. Deferred compensation costs are amortized on a straight-line basis over the vesting period. Elective deferrals are 100% vested. Additionally, the Plan allows Stifel financial advisors who achieve certain levels of production the option to defer a certain percentage of their gross commissions. As stipulated by the Plan, the financial advisors will defer 5% of their gross commissions. The mandatory deferral will be split evenly between company restricted stock units and a company fixed-rate cash debenture. They have the option to defer an additional 1% of gross commissions into company stock units with a 25% matching contribution In addition, certain financial advisors, upon joining our company, may receive company stock units in lieu of transition cash payments. Deferred compensation related to these awards generally vests over a one- to eight-year period. Deferred compensation costs are amortized on a straight-line basis over the deferral period. Employee Profit Sharing Plan Eligible employees of our company who have met certain service requirements may participate in the Stifel Financial Corp. Profit Sharing 401(k) Plan (the “Plan”). Employees are permitted within limitations imposed by tax law to make pre-tax contributions to the Plan. We may match certain employee contributions or make additional contributions to the Plan at our discretion. Our contributions to the Profit Sharing Plan, included in compensation and benefits in the consolidated statements of operations, were $12.8 million, $7.1 million, and $6.5 million for the years ended December 31, 2018, 2017, and 2016, respectively.

Off-Balance Sheet Credit Risk

Off-Balance Sheet Credit Risk	12 Months Ended
	Dec. 31, 2018
Concentration Risks Types No Concentration Percentage [Abstract]
Off-Balance Sheet Credit Risk	In the normal course of business, we execute, settle, and finance customer and proprietary securities transactions. These activities expose our company to off-balance sheet risk in the event that customers or other parties fail to satisfy their obligations. In accordance with industry practice, securities transactions generally settle within two business days after trade date. Should a customer or broker fail to deliver cash or securities as agreed, we may be required to purchase or sell securities at unfavorable market prices. We borrow and lend securities to facilitate the settlement process and finance transactions, utilizing customer margin securities held as collateral. We monitor the adequacy of collateral levels on a daily basis. We periodically borrow from banks on a collateralized basis, utilizing firm and customer margin securities in compliance with SEC rules. Should the counterparty fail to return customer securities pledged, we are subject to the risk of acquiring the securities at prevailing market prices in order to satisfy our customer obligations. We control our exposure to credit risk by continually monitoring our counterparties’ positions, and where deemed necessary, we may require a deposit of additional collateral and/or a reduction or diversification of positions. Our company sells securities it does not currently own (short sales) and is obligated to subsequently purchase such securities at prevailing market prices. We are exposed to risk of loss if securities prices increase prior to closing the transactions. We control our exposure to price risk from short sales through daily review and setting position and trading limits. We manage our risks associated with the aforementioned transactions through position and credit limits and the continuous monitoring of collateral. Additional collateral is required from customers and other counterparties when appropriate. We have accepted collateral in connection with resale agreements, securities borrowed transactions, and customer margin loans. Under many agreements, we are permitted to sell or repledge these securities held as collateral and use these securities to enter into securities lending arrangements or to deliver to counterparties to cover short positions. At December 31, 2018 and 2017, the fair value of securities accepted as collateral where we are permitted to sell or repledge the securities was $2.4 billion and $2.4 billion, respectively, and the fair value of the collateral that had been sold or repledged was $535.4 million and $233.7 million, respectively. We enter into interest rate derivative contracts to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. Our derivative financial instruments are principally used to manage differences in the amount, timing, and duration of our known or expected cash payments related to certain variable-rate affiliated deposits. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for us making fixed-rate payments. Our interest rate hedging strategies may not work in all market environments and, as a result, may not be effective in mitigating interest rate risk. Derivatives’ notional contract amounts are not reflected as assets or liabilities in the consolidated statements of financial condition. Rather, the market or fair value of the derivative transactions are reported in the consolidated statements of financial condition as other assets or accounts payable and accrued expenses, as applicable. For a complete discussion of our activities related to derivative instruments, see Note 14 in the notes to consolidated financial statements. In the ordinary course of business, Stifel Bancorp has commitments to originate loans, standby letters of credit, and lines of credit. Commitments to originate loans are agreements to lend to a customer as long as there is no violation of any condition established by the contract. These commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash commitments. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if necessary, is based on the credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, commercial real estate, and residential real estate. At December 31, 2018 and 2017, Stifel Bancorp had outstanding commitments to originate loans aggregating $146.7 million and $160.2 million, respectively. The commitments extended over varying periods of time, with all commitments at December 31, 2018, scheduled to be disbursed in the following three months. Through Stifel Bancorp, in the normal course of business, we originate residential mortgage loans and sell them to investors. We may be required to repurchase mortgage loans that have been sold to investors in the event there are breaches of certain representations and warranties contained within the sales agreements. We may be required to repurchase mortgage loans that were sold to investors in the event that there was inadequate underwriting or fraud, or in the event that the loans become delinquent shortly after they are originated. We also may be required to indemnify certain purchasers and others against losses they incur in the event of breaches of representations and warranties and in various other circumstances, and the amount of such losses could exceed the repurchase amount of the related loans. Consequently, we may be exposed to credit risk associated with sold loans. Standby letters of credit are irrevocable conditional commitments issued by Stifel Bancorp to guarantee the performance of a customer to a third party. Financial standby letters of credit are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing, and similar transactions. Performance standby letters of credit are issued to guarantee performance of certain customers under non-financial contractual obligations. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loans to customers. Should Stifel Bancorp be obligated to perform under the standby letters of credit, it may seek recourse from the customer for reimbursement of amounts paid. At December 31, 2018 and 2017, Stifel Bancorp had outstanding letters of credit totaling $26.3 million and $82.5 million, respectively. A majority of the standby letters of credit commitments at December 31, 2018, have expiration terms that are less than one year. Lines of credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Lines of credit generally have fixed expiration dates. Stifel Bancorp uses the same credit policies in granting lines of credit as it does for on-balance sheet instruments. At December 31, 2018 and 2017, Stifel Bancorp had granted unused lines of credit to commercial and consumer borrowers aggregating $919.5 million and $590.5 million, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Income Taxes	The provision for income taxes consists of the following (in thousands) Year Ended December 31, 2018 2017 2016 Current taxes: Federal $ 89,971 $ (29,396 ) $ 7,927 State 36,070 (334 ) 5,818 Foreign 99 (1,734 ) 1,255 126,140 (31,464 ) 15,000 Deferred taxes: Federal 11,932 114,842 39,127 State 2,267 1,728 6,261 Foreign 55 1,559 674 14,254 118,129 46,062 Provision for income taxes $ 140,394 $ 86,665 $ 61,062 Reconciliation of the statutory federal income tax rate with our company’s effective income tax rate is as follows (in thousands) Year Ended December 31, 2018 2017 2016 Statutory rate $ 112,215 $ 94,338 $ 49,904 State income taxes, net of federal income tax 30,762 6,721 7,688 Foreign tax rate difference (318 ) (412 ) (1,810 ) Change in uncertain tax position (617 ) 1,544 41 Revaluation of deferred tax assets (3,006 ) 42,443 — Excess tax benefit from stock-based compensation (3,700 ) (57,431 ) — Non-deductible litigation expense — — 7,700 Other, net 5,058 (538 ) (2,461 ) $ 140,394 $ 86,665 $ 61,062 Tax effect of temporary differences and carryforwards that comprise significant portions of deferred tax assets and liabilities (in thousands) December 31, 2018 2017 Deferred tax assets: Deferred compensation $ 74,916 $ 71,687 Receivable reserves 30,252 22,679 Net operating loss carryforwards 29,699 31,986 Accrued expenses 19,832 33,957 Unrealized loss on investments 10,635 — Depreciation — 4,012 Other 3,066 — Total deferred tax assets 168,400 164,321 Valuation allowance (3,944 ) (4,285 ) 164,456 160,036 Deferred tax liabilities: Goodwill and other intangibles (42,045 ) (38,982 ) Depreciation (6,629 ) — Prepaid expenses (3,774 ) (2,834 ) Unrealized gain on investments — (11,081 ) Other — (1,987 ) (52,448 ) (54,884 ) Net deferred tax asset $ 112,008 $ 105,152 On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (“Tax Legislation”) was signed into law making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of U.S international taxation from a worldwide tax system to a territorial system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. In December 2017, the SEC staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”), which allows us to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. In accordance with SAB 118, we recorded an additional tax benefit of $3.0 million during 2018 for the re-measurement of certain deferred tax assets and liabilities based on the rates in which they are expected to reverse in the future. Our measurement of deferred tax taxes and our provisional analysis of the one-time repatriation transition tax is complete with no additional impact on current year earnings. Our net deferred tax asset at December 31, 2018, includes net operating loss carryforwards of $308.1 million that expire between 2020 and 2038. Certain of our net operating loss carryforwards do not expire. A valuation allowance is recorded to the extent that it is more likely than not that any portion of the deferred tax asset will not be realized. The valuation allowance was decreased by $0.3 million. We believe the realization of the remaining net deferred tax asset of $112.0 million is more likely than not based on the ability to carry back losses against prior year taxable income for tax years before 2018 and carryforward net operating losses indefinitely after 2018, and expectations of future taxable income, which is supported by a history of cumulative income. The current tax payable, included in accounts payable and accrued expenses, is $8.4 million and $4.2 million as of December 31, 2018 and 2017, respectively. At December 31, 2018, the Company did not have a tax receivable. At December 31, 2017, the Company had a tax receivable of $54.3 million, included in other assets, which is primarily attributable to tax deductions that the Company will realize as a result of the actions taken to maximize tax savings in response to the Tax Legislation that was enacted in the fourth quarter of 2017 and prior year tax overpayments. As of December 31, 2018, we considered all undistributed earnings of non-U.S. subsidiaries to be permanently reinvested. Therefore, we have not provided for any U.S. deferred income taxes. Because the time or manner of repatriation is uncertain, we cannot determine the impact of local taxes, withholding taxes and foreign tax credits associated with the future repatriation of such earnings, and therefore cannot quantify the tax liability that would be payable in the event all such foreign earnings are repatriated. Uncertain Tax Positions As of December 31, 2018 and 2017, we had $0.3 million and $3.2 million, respectively, of gross unrecognized tax benefits, all of which, if recognized, would impact the effective tax rate. We recognize interest and penalties related to uncertain tax positions in provision for income taxes in the consolidated statements of operations. As of December 31, 2018 and 2017, we had accrued interest and penalties of $0.1 million and $0.5 million, respectively, before benefit of federal tax deduction, included in accounts payable and accrued expenses in our consolidated statements of financial condition. The amount of interest and penalties recognized in our consolidated statements of operations for the years ended December 31, 2018, 2017, and 2016, was not significant. The following table summarizes the activity related to our company’s unrecognized tax benefits from January 1, 2016 to December 31, 2018 (in thousands) Year Ended December 31, 2018 2017 2016 Beginning balance $ 3,180 $ 1,800 $ 2,717 Increase related to prior year tax positions 4 3,036 5 Decrease related to prior year tax positions (33 ) (287 ) (31 ) Increase related to current year tax positions 191 — — Decrease related to settlements with taxing authorities (3,030 ) (171 ) (42 ) Decrease related to lapsing of statute of limitations — (1,198 ) — Increase/(decrease) related to business acquisitions — — (849 ) Ending balance $ 312 $ 3,180 $ 1,800 We file income tax returns with the U.S. federal jurisdiction, various states, and certain foreign jurisdictions. We are not subject to U.S. federal examination for taxable years before 2013. We are not subject to certain state and local, or non-U.S. income tax examinations for taxable years before 2010. There is a reasonable possibility that the unrecognized tax benefits will change within the next 12 months as a result of the expiration of various statutes of limitations or for the resolution of U.S. federal and state examinations, but we do not expect this change to be material to the consolidated financial statements.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Reporting	We currently operate through the following three reporting segments: Global Wealth Management, Institutional Group, and various corporate activities combined in the Other segment. Our Global Wealth Management segment consists of two operating segments, the Private Client Group and Stifel Bancorp. The Private Client Group includes branch offices and independent contractor offices of our broker-dealer subsidiaries located throughout the United States. These branches provide securities brokerage services, including the sale of equities, mutual funds, fixed income products, and insurance, as well as offering banking products to their clients through our bank subsidiaries, which provide residential, consumer, and commercial lending, as well as FDIC-insured deposit accounts to customers of our private client group and to the general public. The Institutional Group segment includes institutional sales and trading. It provides securities brokerage, trading, and research services to institutions, with an emphasis on the sale of equity and fixed income products. This segment also includes the management of and participation in underwritings for both corporate and public finance (exclusive of sales credits generated through the private client group, which are included in the Global Wealth Management segment), merger and acquisition, and financial advisory services. The Other segment includes interest income from stock borrow activities, unallocated interest expense, interest income and gains and losses from investments held, compensation expense associated with the expensing of restricted stock awards with no continuing service requirements in conjunction with recent acquisitions and the actions taken by the Company in response to the Tax Regulation enacted in the fourth quarter of 2017, amortization of stock-based awards, and all unallocated overhead cost associated with the execution of orders; processing of securities transactions; custody of client securities; receipt, identification, and delivery of funds and securities; compliance with regulatory and legal requirements; internal financial accounting and controls; and general administration and acquisition charges. Information concerning operations in these segments of business for the years ended December 31, 2018, 2017, and 2016, is as follows (in thousands) Year Ended December 31, 2018 2017 2016 Net revenues: (1) Global Wealth Management $ 1,990,319 $ 1,822,218 $ 1,563,410 Institutional Group 1,055,495 1,110,768 1,014,164 Other (20,933 ) (6,554 ) (2,078 ) $ 3,024,881 $ 2,926,432 $ 2,575,496 Income/(loss) before income taxes: Global Wealth Management $ 737,003 $ 626,906 $ 430,318 Institutional Group 157,051 217,981 164,143 Other (359,692 ) (575,351 ) (451,879 ) $ 534,362 $ 269,536 $ 142,582 (1) No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2018, 2017, and 2016. The following table presents our company’s total assets on a segment basis at December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 Global Wealth Management $ 21,040,224 $ 17,717,617 Institutional Group 3,238,617 3,313,304 Other 240,757 353,032 $ 24,519,598 $ 21,383,953 We have operations in the United States, United Kingdom, Europe, and Asia. Our company’s foreign operations are conducted through its wholly owned subsidiary, SNEL. Substantially all long-lived assets are located in the United States. Revenues, classified by the major geographic areas in which they were earned for the years ended December 31, 2018, 2017, and 2016, were as follows (in thousands): Year Ended December 31, 2018 2017 2016 United States $ 2,855,955 $ 2,783,175 $ 2,429,714 United Kingdom 156,557 129,288 132,622 Other 12,369 13,969 13,160 $ 3,024,881 $ 2,926,432 $ 2,575,496

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Basic EPS is computed by dividing earnings available to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. Diluted earnings per share include dilutive stock options and stock units under the treasury stock method. The following table sets forth the computation of basic and diluted earnings per share for the years ended December 31, 2018, 2017, and 2016 (in thousands, except per share data) Year Ended December 31, 2018 2017 2016 Net income $ 393,968 $ 182,871 $ 81,520 Preferred dividends 9,375 9,375 3,906 Net income available to common shareholders $ 384,593 $ 173,496 $ 77,614 Shares for basic and diluted calculation: Average shares used in basic computation 71,786 68,562 66,871 Dilutive effect of stock options and units (1) 9,535 12,473 10,692 Average shares used in diluted computation 81,321 81,035 77,563 Earnings per common share: Basic $ 5.36 $ 2.53 $ 1.16 Diluted $ 4.73 $ 2.14 $ 1.00 (1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Diluted earnings per share include stock options and units. For the years ended December 31, 2018, 2017, and 2016, the anti-dilutive effect from restricted stock units was immaterial. Cash Dividends During the year ended December 31, 2018, we declared and paid cash dividends of $0.48 per common share. During the year ended December 31, 2017, we declared and paid cash dividends of $0.20 per common share. We did not declare or pay any dividends on our common stock during 2016.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Shareholders' Equity	Share Repurchase Program We have an ongoing authorization from the Board of Directors to repurchase our common stock in the open market or in negotiated transactions. In November 2018, the Board of Directors authorized the repurchase of an additional 5.3 million shares bringing the authorized share repurchase amount to 10.0 million shares. At December 31, 2018, the maximum number of shares that may yet be purchased under this plan was 9.0 million. The repurchase program has no expiration date. These purchases may be made on the open market or in privately negotiated transactions, depending upon market conditions and other factors. Repurchased shares may be used to meet obligations under our employee benefit plans and for general corporate purposes. During the year ended December 31, 2018, we repurchased $ 170.2 13.0 Issuance of Common Stock from Treasury During the year ended December 31, 2018, we issued 0.5 million shares of common stock from treasury. Share issuances out of treasury during the year ended December 31, 2018, were primarily a result of the vesting and exercise transactions under our incentive stock award plans. During the year ended December 31, 2017, we issued 2.4 million shares of common stock from treasury. Share issuances out of treasury during the year ended December 31, 2017, were primarily a result of the vesting and exercise transactions under our incentive stock award plans. Issuance of Common Stock On August 31, 2018, we issued approximately 2.0 million shares for acquisition of Business Bancshares, Inc. See Note 3 in the notes to consolidated financial statements for additional information regarding the acquisition. On January 3, 2017, we issued 0.2 million shares related to the purchase of City Securities, Inc. See Note 3 in the notes to consolidated financial statements for additional information regarding the acquisition. Issuance of Preferred Stock On July 11, 2016, our company issued $150.0 million of perpetual 6.25% Non-Cumulative Perpetual Preferred Stock, Series A, $1.00 par value, with a liquidation preference of $25,000 per share (equivalent to $25 liquidation preference per depositary share). When, as, and if declared by the board of directors of the company, dividends will be payable at an annual rate of 6.25%, payable quarterly, in arrears. We may redeem the Series A preferred stock at our option, subject to regulatory approval, on or after July 15, 2021, or following a regulatory capital treatment event, as defined.

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2018
Variable Interest Entity Not Primary Beneficiary Disclosures [Abstract]
Variable Interest Entities	Our company’s involvement with VIEs is limited to entities used as investment vehicles and private equity funds, the establishment of Stifel Financial Capital Trusts, and the ownership of a securitization that purchases, leases, and disposes of aircraft engines. We have formed several non-consolidated investment funds with third-party investors that are typically organized as limited liability companies (“LLCs”) or limited partnerships. These partnerships and LLCs have assets of $231.8 million at December 31, 2018. For those funds where we act as the general partner, our company’s economic interest is generally limited to management fee arrangements as stipulated by the fund operating agreements. We have generally provided the third-party investors with rights to terminate the funds or to remove us as the general partner. Management fee revenue earned by our company was insignificant during the years ended December 31, 2018, 2017, and 2016. In addition, our direct investment interest in these entities is insignificant at December 31, 2018 and 2017. Thomas Weisel Capital Management LLC, a subsidiary of our company, acts as the general partner of a series of investment funds in venture capital and fund of funds and manages investment funds that are active buyers of secondary interests in private equity funds, as well as portfolios of direct interests in venture-backed companies. These partnerships have combined assets of $227.0 million at December 31, 2018. We hold variable interests in these funds as a result of our company’s rights to receive management fees. Our company’s investment in and additional capital commitments to the private equity funds are also considered variable interests. The additional capital commitments are subject to call at a later date and are limited in amount. Our exposure to loss is limited to our investments in, advances and commitments to, and receivables due from these funds, and that exposure is insignificant at December 31, 2018. Management fee revenue earned by our company was insignificant during the years ended December 31, 2018, 2017, and 2016. For the entities noted above that were determined to be VIEs, we have concluded that we are not the primary beneficiary, and therefore, we are not required to consolidate these entities. Additionally, for certain other entities, we reviewed other relevant accounting guidance, which states the general partner in a limited partnership is presumed to control that limited partnership. The presumption may be overcome if the limited partners have either: (1) the substantive ability to dissolve the limited partnership or otherwise remove the general partner without cause, or (2) substantive participating rights, which provide the limited partners with the ability to effectively participate in significant decisions that would be expected to be made in the ordinary course of the limited partnership’s business and thereby preclude the general partner from exercising unilateral control over the partnership. If the criteria are not met, the consolidation of the partnership or limited liability company is required. Based on our evaluation of these entities, we determined that these entities do not require consolidation. Debenture to Stifel Financial Capital Trusts We have completed private placements of cumulative trust preferred securities through Stifel Financial Capital Trust II, Stifel Financial Capital Trust III, and Stifel Financial Capital Trust IV (collectively, the “Trusts”). The Trusts are non-consolidated wholly owned business trust subsidiaries of our company and were established for the limited purpose of issuing trust securities to third parties and lending the proceeds to our company. The trust preferred securities represent an indirect interest in junior subordinated debentures purchased from our company by the Trusts, and we effectively provide for the full and unconditional guarantee of the securities issued by the Trusts. We make timely payments of interest to the Trusts as required by contractual obligations, which are sufficient to cover payments due on the securities issued by the Trusts, and believe that it is unlikely that any circumstances would occur that would make it necessary for our company to make payments related to these Trusts other than those required under the terms of the debenture agreements and the trust preferred securities agreements. The Trusts were determined to be VIEs because the holders of the equity investment at risk do not have adequate decision-making ability over the Trust’s activities. Our investment in the Trusts is not a variable interest, because equity interests are variable interests only to the extent that the investment is considered to be at risk. Because our investment was funded by the Trusts, it is not considered to be at risk. Securitization Interests On July 31, 2018, the Company purchased 100% of the share capital of Jet Holding S.a.r.l. (“Jet Holdings”), which is the owner of 100% of the outstanding E-Certificates in FAN Engine Securitization Ltd. (“FAN”). FAN is a securitization which purchases, leases, and disposes of commercial aircraft engines. As of the acquisition date, FAN owned 24 leased aircraft engines through common law trusts and FAN Leasing Dublin Limited, all of which are wholly owned subsidiaries of FAN. As the holder of the E-Certificate, our obligation to absorb losses is limited to the equity at risk (in this instance the consideration paid to acquire the E-Certificate). The residual returns that could be potentially generated by the activities of FAN are not pro rata with our ownership interests in the securitization. In addition, we have the power to direct the activities of FAN. As such, we have determined that FAN is a variable interest entity with Jet Holdings the primary beneficiary; therefore, FAN has been consolidated at December 31, 2018. Upon consolidation of FAN at fair value, which we determined was not a business, we recognized a gain of $15.3 million, which is included in other income in the consolidated statements of operations. At December 31, 2018, the assets of FAN, which primarily consisted of operating leases, and liabilities, which primarily consisted of debt, were immaterial to our consolidated statements of financial condition.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	We evaluate subsequent events that have occurred after the balance sheet date but before the financial statements are issued. There are two types of subsequent events: (1) recognized, or those that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements, and (2) non-recognized, or those that provide evidence about conditions that did not exist at the date of the balance sheet but arose after that date.

Quarterly Financial Information

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Year Ended December 31, 2018 (in thousands, except per share amounts) 1 st 2 nd 3 rd 4 th Operating revenues $ 639,077 $ 625,590 $ 617,050 $ 666,791 Interest income 137,734 154,421 169,760 184,534 Total revenues 776,811 780,011 786,810 851,325 Interest expense 26,453 37,279 48,468 57,876 Net revenues 750,358 742,732 738,342 793,449 Total non-interest expenses 630,804 624,385 597,812 637,518 Income before income tax expense 119,554 118,347 140,530 155,931 Provision for income taxes 30,793 31,060 36,672 41,869 Net income 88,761 87,287 103,858 114,062 Preferred dividends 2,344 2,344 2,343 2,344 Net income available to common shareholders $ 86,417 $ 84,943 $ 101,515 $ 111,718 Earnings per common share Basic $ 1.20 $ 1.18 $ 1.41 $ 1.56 Diluted $ 1.06 $ 1.04 $ 1.25 $ 1.38 Weighted-average number of common shares outstanding: Basic 71,999 71,692 71,919 71,666 Diluted 81,789 81,299 81,484 80,706 Cash dividends declared per common share $ 0.12 $ 0.12 $ 0.12 $ 0.12 Year Ended December 31, 2017 (in thousands, except per share amounts) 1 st 2 nd 3 rd 4 th Operating revenues $ 590,474 $ 633,340 $ 620,932 $ 697,335 Interest income 100,953 108,951 117,862 126,615 Total revenues 691,427 742,291 738,794 823,950 Interest expense 15,896 16,644 17,625 19,865 Net revenues 675,531 725,647 721,169 804,085 Total non-interest expenses 596,512 642,449 613,030 804,905 Income before income tax expense 79,019 83,198 108,139 (820 ) Provision for income taxes 13,507 30,387 41,603 1,168 Net income 65,512 52,811 66,536 (1,988 ) Preferred dividends 2,344 2,344 2,343 2,344 Net income available to common shareholders $ 63,168 $ 50,467 $ 64,193 $ (4,332 ) Earnings per common share (1) Basic $ 0.92 $ 0.74 $ 0.94 $ (0.06 ) Diluted $ 0.78 $ 0.63 $ 0.79 $ (0.06 ) Weighted-average number of common shares outstanding: Basic 68,386 68,556 68,522 68,782 Diluted 80,695 80,021 80,881 68,782 Cash dividends declared per common share $ — $ — $ 0.10 $ 0.10 (1) Earnings per share for the three months ended December 31, 2017 is calculated using the basic weighted average number of common shares outstanding, not fully dilutive shares, as they are anti-dilutive in periods a loss is incurred.

Nature of Operations and Basi_2

Nature of Operations and Basis Of Presentation (Policies)	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature Of Operations	Nature of Operations Stifel Financial Corp. (the “Company”), through its wholly owned subsidiaries, is principally engaged in retail brokerage; securities trading; investment banking; investment advisory; retail, consumer, and commercial banking; and related financial services. Our major geographic area of concentration is throughout the United States, with a growing presence in the United Kingdom and Europe. Our company’s principal customers are individual investors, corporations, municipalities, and institutions.
Basis Of Presentation	Basis of Presentation The consolidated financial statements include Stifel Financial Corp. and its wholly owned subsidiaries, principally Stifel, Nicolaus & Company, Incorporated (“Stifel”), Keefe Bruyette & Woods (“KBW”), and Stifel Bancorp, Inc. (“Stifel Bancorp”). Unless otherwise indicated, the terms “we,” “us,” “our,” or “our company” in this report refer to Stifel Financial Corp. and its wholly owned subsidiaries. The accompanying consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, which require management to make certain estimates and assumptions that affect the reported amounts. We consider significant estimates, which are most susceptible to change and impacted significantly by judgments, assumptions, and estimates, to be: valuation of financial instruments and investments in partnerships, accrual for contingencies, allowance for loan losses, derivative instruments and hedging activities, fair value of goodwill and intangible assets, provision for income taxes and related tax reserves, and forfeitures associated with stock-based compensation. Actual results could differ from those estimates. Certain amounts from prior periods have been reclassified to conform to the current period’s presentation. The effect of these reclassifications on our company’s previously reported consolidated financial statements was not material.
Consolidation Policies	Consolidation Policies The consolidated financial statements include the accounts of Stifel Financial Corp. and its subsidiaries. All material intercompany balances and transactions have been eliminated in consolidation. For consolidated subsidiaries that are less than wholly owned, the third-party holdings of equity interests are referred to as non-controlling interests. The portion of shareholders’ equity that is attributable to non-controlling interests for such subsidiaries is presented as non-controlling interests, a component of total equity, in the consolidated statements of financial condition. Our non-controlling interest represents a 27.5% third-party ownership of North Shore Aviation Holdings LLC (“North Shore”), a wholly owned subsidiary of the Company, that through its subsidiary owns 5 airplane engines. See Note 9 for additional information on operating leases. We also have investments or interests in other entities for which we must evaluate whether to consolidate by determining whether we have a controlling financial interest or are considered to be the primary beneficiary. In determining whether to consolidate these entities, we evaluate whether the entity is a voting interest entity or a variable interest entity (“VIE”). When we do not have a controlling interest in an entity, but we exert significant influence over the entity, we apply the equity method of accounting.
Voting Interest Entity	Voting Interest Entity – Voting interest entities are entities that have (i) total equity investment at risk sufficient to fund expected future operations independently, and (ii) equity holders who have the obligation to absorb losses or receive residual returns and the right to make decisions about the entity’s activities. We consolidate voting interest entities when we determine that there is a controlling financial interest, usually ownership of all, or a majority of, the voting interest.
Variable Interest Entity	Variable Interest Entity – VIEs are entities that lack one or more of the characteristics of a voting interest entity. We are required to consolidate certain VIEs in which we have the power to direct the activities of the entity and the obligation to absorb significant losses or receive significant benefits. In other cases, we consolidate VIEs when we are deemed to be the primary beneficiary. The primary beneficiary is defined as the entity that has a variable interest, or a combination of variable interests, that maintains control and receives benefits or will absorb losses that are not pro rata with its ownership interests. The determination as to whether an entity is a VIE is based on the structure and nature of the entity. We also consider other characteristics, such as the ability to influence the decision-making relative to the entity’s activities and how the entity is financed. With the exception of entities eligible for the deferral codified in Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2010-10, “Consolidation: Amendments for Certain Investment Funds” (“ASU 2010-10”) (generally asset managers and investment companies), ASC 810 states that a controlling financial interest in an entity is present when an enterprise has a variable interest, or combination of variable interests, that have both the power to direct the activities of the entity that most significantly impact the entity’s economic performance and the obligation to absorb losses of the entity or the rights to receive benefits from the entity that could potentially be significant to the entity. Entities meeting the deferral provision defined by ASU 2010-10 are evaluated under the historical VIE guidance. Under the historical guidance, a controlling financial interest in an entity is present when an enterprise has a variable interest, or combination of variable interests, that will absorb a majority of the entity’s expected losses, receive a majority of the entity’s expected residual returns, or both. The enterprise with a controlling financial interest, known as the primary beneficiary, consolidates the VIE. We determine whether we are the primary beneficiary of a VIE by first performing a qualitative analysis of the VIE’s control structure, expected benefits and losses, and expected residual returns. This analysis includes a review of, among other factors, the VIE’s capital structure, contractual terms, which interests create or absorb benefits or losses, variability, related party relationships, and the design of the VIE. Where a qualitative analysis is not conclusive, we perform a quantitative analysis. We reassess our initial evaluation of an entity as a VIE and our initial determination of whether we are the primary beneficiary of a VIE upon the occurrence of certain reconsideration events. See Note 28 for additional information on VIEs.

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents We consider money market mutual funds and highly liquid investments with original maturities of three months or less that are not restricted or segregated to be cash equivalents. Cash and cash equivalents include deposits with banks, federal funds sold, money market mutual funds, and certificates of deposit. Cash and cash equivalents also include balances that our bank subsidiaries maintain at the Federal Reserve Bank.
Cash Segregated For Regulatory Purposes	Cash Segregated for Regulatory Purposes Our broker-dealer subsidiaries are subject to Rule 15c3-3 under the Securities Exchange Act of 1934, which requires our company to maintain cash or qualified securities in a segregated reserve account for the exclusive benefit of its clients. In accordance with Rule 15c3-3, our company has portions of its cash segregated for the exclusive benefit of clients at December 31, 2018.
Brokerage Client Receivables, Net	Brokerage Client Receivables, Net Brokerage client receivables include receivables of our company’s broker-dealer subsidiaries, which represent amounts due on cash and margin transactions and are generally collateralized by securities owned by clients. Brokerage client receivables, primarily consisting of floating-rate loans collateralized by customer-owned securities, are charged interest at rates similar to other such loans made throughout the industry. The receivables are reported at their outstanding principal balance net of allowance for doubtful accounts. When a brokerage client receivable is considered to be impaired, the amount of the impairment is generally measured based on the fair value of the securities acting as collateral, which is measured based on current prices from independent sources, such as listed market prices or broker-dealer price quotations. Securities owned by customers, including those that collateralize margin or other similar transactions, are not reflected in the consolidated statements of financial condition.
Securities Borrowed and Securities Loaned	Securities Borrowed and Securities Loaned Securities borrowed require our company to deliver cash to the lender in exchange for securities and are included in receivables from brokers, dealers, and clearing organizations in the consolidated statements of financial condition. For securities loaned, we generally receive collateral in the form of cash in an amount in excess of the market value of securities loaned. Securities loaned are included in payables to brokers, dealers, and clearing organizations in the consolidated statements of financial condition. We monitor the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as necessary. Fees received or paid are recorded in interest revenue or interest expense in the consolidated statements of operations. Substantially all of these transactions are executed under master netting agreements, which gives us right of offset in the event of counterparty default; however, such receivables and payables with the same counterparty are not set off in the consolidated statements of financial condition.
Securities Purchased Under Agreements to Resell and Repurchase Agreements	Securities Purchased Under Agreements to Resell and Repurchase Agreements Securities purchased under agreements to resell (“resale agreements”) are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. We obtain control of collateral with a market value equal to or in excess of the principal amount loaned and accrued interest under resale agreements. These agreements are short-term in nature and are generally collateralized by U.S. government securities, U.S. government agency securities, and corporate bonds. We value collateral on a daily basis, with additional collateral obtained when necessary to minimize the risk associated with this activity. Securities sold under agreements to repurchase (“repurchase agreements”) are collateralized financing transactions that are recorded at their contractual amounts plus accrued interest. We make delivery of securities sold under agreements to repurchase and monitor the value of collateral on a daily basis. When necessary, we will deliver additional collateral.
Financial Instruments	Financial Instruments We measure certain financial assets and liabilities at fair value on a recurring basis, including cash equivalents, financial instruments owned, available-for-sale securities, investments, financial instruments sold, but not yet purchased, and derivatives. Other than those separately discussed in the notes to the consolidated financial statements, the remaining financial instruments are generally short-term in nature, and their carrying values approximate fair value. The fair value of a financial instrument is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., “the exit price”) in an orderly transaction between market participants at the measurement date. We have categorized our financial instruments measured at fair value into a three-level classification in accordance with Topic 820, “Fair Value Measurement,” Level 1 – Quoted prices (unadjusted) are available in active markets for identical assets or liabilities as of the measurement date. A quoted price for an identical asset or liability in an active market provides the most reliable fair value measurement, because it is directly observable to the market. Level 2 – Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the measurement date. The nature of these financial instruments includes instruments for which quoted prices are available but traded less frequently, derivative instruments whose fair value have been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed. Level 3 – Instruments that have little to no pricing observability as of the measurement date. These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation. Valuation of Financial Instruments When available, we use observable market prices, observable market parameters, or broker or dealer prices (bid and ask prices) to derive the fair value of financial instruments. In the case of financial instruments transacted on recognized exchanges, the observable market prices represent quotations for completed transactions from the exchange on which the financial instrument is principally traded. A substantial percentage of the fair value of our financial instruments owned, available-for-sale securities, investments, and financial instruments sold, but not yet purchased, are based on observable market prices, observable market parameters, or derived from broker or dealer prices. The availability of observable market prices and pricing parameters can vary from product to product. Where available, observable market prices and pricing or market parameters in a product may be used to derive a price without requiring significant judgment. In certain markets, observable market prices or market parameters are not available for all products, and fair value is determined using techniques appropriate for each particular product. These techniques involve some degree of judgment. For investments in illiquid or privately held securities that do not have readily determinable fair values, the determination of fair value requires us to estimate the value of the securities using the best information available. Among the factors we consider in determining the fair value of investments are the cost of the investment, terms and liquidity, developments since the acquisition of the investment, the sales price of recently issued securities, the financial condition and operating results of the issuer, earnings trends and consistency of operating cash flows, the long-term business potential of the issuer, the quoted market price of securities with similar quality and yield that are publicly traded, and other factors generally pertinent to the valuation of investments. In instances where a security is subject to transfer restrictions, the value of the security is based primarily on the quoted price of a similar security without restriction but may be reduced by an amount estimated to reflect such restrictions. The fair value of these investments is subject to a high degree of volatility and may be susceptible to significant fluctuation in the near term, and the differences could be material. The degree of judgment used in measuring the fair value of financial instruments generally correlates to the level of pricing observability. Pricing observability is impacted by a number of factors, including the type of financial instrument, whether the financial instrument is new to the market and not yet established, and the characteristics specific to the transaction. Financial instruments with readily available active quoted prices for which fair value can be measured from actively quoted prices generally will have a higher degree of pricing observability and a lesser degree of judgment used in measuring fair value. Conversely, financial instruments rarely traded or not quoted will generally have less, or no, pricing observability and a higher degree of judgment used in measuring fair value. See Note 5 for additional information on how we value our financial instruments.
Available-for-Sale and Held-to-Maturity Securities	Available-for-Sale and Held-to-Maturity Securities Securities available for sale, which are carried at fair value, include U.S. government agency securities; state and municipal securities; agency, non-agency, and commercial mortgage-backed securities; corporate fixed income securities; and asset-backed securities, which primarily includes collateralized loan obligations. Securities held to maturity are recorded at amortized cost based on our company’s positive intent and ability to hold these securities to maturity. Securities held to maturity include agency, commercial, and non-agency mortgage-backed securities, asset-backed securities, consisting of collateralized loan obligation securities and ARS, and corporate fixed income securities. We evaluate all securities in an unrealized loss position quarterly to assess whether the impairment is other-than-temporary. Our other-than-temporary impairment (“OTTI”) assessment is a subjective process requiring the use of judgments and assumptions. Accordingly, we consider a number of qualitative and quantitative criteria in our assessment, including the extent and duration of the impairment, recent events specific to the issuer and/or industry to which the issuer belongs, the payment structure of the security, external credit ratings and the failure of the issuer to make scheduled interest or principal payments, the value of underlying collateral, current market conditions, and our company’s ability and intent to hold the investment until its value recovers or the securities mature. We may determine that the decline in fair value of an investment is other-than-temporary if our analysis of these factors indicates that we will not recover our investment in the securities. If we determine that impairment on our debt securities is other-than-temporary and we have made the decision to sell the security or it is more likely than not that we will be required to sell the security prior to recovery of its amortized cost basis, we recognize the entire portion of the impairment in earnings. If we have not made a decision to sell the security and we do not expect that we will be required to sell the security prior to recovery of the amortized cost basis, we recognize only the credit component of OTTI in other operating expenses in the consolidated statements of operations. The remaining unrealized loss due to factors other than credit, or the non-credit component, is recorded in accumulated other comprehensive loss. We determine the credit component based on the difference between the security’s amortized cost basis and the present value of its expected future cash flows, discounted based on the purchase yield. The non-credit component represents the difference between the security’s fair value and the present value of expected future cash flows. We estimate the portion of loss attributable to credit using a discounted cash flow model. Key assumptions used in estimating the expected cash flows include default rates, loss severity, and prepayment rates. Assumptions used can vary widely based on the collateral underlying the securities and are influenced by factors such as collateral type, loan interest rate, geographical location of the borrower, and borrower characteristics. Unrealized gains and losses on our available-for-sale securities are reported, net of taxes, in accumulated other comprehensive loss included in shareholders’ equity. Amortization of premiums and accretion of discounts are recorded as interest income in the consolidated statements of operations using the interest method. Realized gains and losses from sales of securities available for sale are determined on a specific identification basis and are included in other income in the consolidated statements of operations in the period they are sold. For securities transferred from available-for-sale to held-to-maturity, carrying value also includes unrealized gains and losses recognized in accumulated other comprehensive loss at the date of transfer. Such unrealized gains or losses are accreted over the remaining life of the security with no impact on future net income.
Loan Classification	Loan Classification We classify loans based on our investment strategy and management’s assessment of our intent and ability to hold loans for the foreseeable future or until maturity. Management’s intent and ability with respect to certain loans may change from time to time depending on a number of factors, including economic, liquidity, and capital conditions. The accounting and measurement framework for loans differs depending on the loan classification. The classification criteria and accounting and measurement framework for bank loans and loans held for sale are described below. Bank Loans and Allowance for Loan Losses Bank loans consist of commercial and residential mortgage loans, commercial and industrial loans, stock-secured loans, home equity loans, construction loans, and consumer loans originated or acquired by Stifel Bancorp. Bank loans include those loans that management has the intent and ability to hold and are recorded at outstanding principal adjusted for any charge-offs, allowance for loan losses, deferred origination fees and costs, and purchased discounts. Loan origination costs, net of fees, and premiums and discounts on purchased loans are deferred and recognized over the contractual life of the loan as an adjustment of yield using the interest method. Bank loans are generally collateralized by real estate, real property, marketable securities, or other assets of the borrower. Interest income is recognized using the effective interest rate method, which is based upon the respective interest rates and the average daily asset balance. Discount accretion/premium amortization is recognized using the effective interest rate method, which is based upon the respective interest rate and expected lives of loans. We regularly review the loan portfolio and have established an allowance for loan losses for inherent losses estimated to have occurred in the loan portfolio through a provision for loan losses charged to other operating expenses in the consolidated statements of operations. In providing for the allowance for loan losses, we consider historical loss experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective, as it requires estimates that are susceptible to significant revision as more information becomes available. Loans Held for Sale Loans that we intend to sell or for which we do not have the ability and intent to hold for the foreseeable future are classified as held for sale. Loans held for sale consist of fixed-rate and adjustable-rate residential and multi-family real estate mortgage loans intended for sale. Loans held for sale are stated at lower of cost or market value on an individual loan basis. Declines in market value below cost and any gains or losses on the sale of these assets are recognized in other income in the consolidated statements of operations. Market value is determined based on prevailing market prices for loans with similar characteristics or on sale contract prices. Deferred fees and costs related to these loans are not amortized but are recognized as part of the cost basis of the loan at the time it is sold. Because loans held for sale are reported at lower of cost or market value, an allowance for loan losses is not established for loans held for sale.
Impaired Loans	Impaired Loans A loan is considered impaired when, based on current information and events, it is probable that the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement will not be collectible. Factors considered in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. We determine the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record, and the amount of the shortfall in relation to the principal and interest owed. We consider a loan a trouble debt restructuring when an existing borrower is granted concessionary rates or terms, which would not otherwise be offered. The concessions granted do not reflect current market conditions for a new loan of similar risk to another borrower in similar financial circumstances. Once a loan is determined to be impaired, when principal or interest becomes 90 days past due or when collection becomes uncertain, the accrual of interest and amortization of deferred loan origination fees is discontinued (“non-accrual status”) and any accrued and unpaid interest income is reversed. Loans placed on non-accrual status are returned to accrual status when all delinquent principal and interest payments are collected and the collectibility of future principal and interest payments is reasonably assured. Loan losses are charged against the allowance for loan losses when we believe the uncollectibility of a loan balance is certain. Subsequent recoveries, if any, are credited to the allowance for loan losses. Large groups of smaller balance homogenous loans are collectively evaluated for impairment. Accordingly, we do not separately identify individual consumer and residential loans for impairment measurements. Impairment is measured on a loan-by-loan basis for non-homogeneous loans, and a specific allowance is established for individual loans determined to be impaired. Impairment is measured by comparing the carrying value of the impaired loan to the present value of its expected cash flow discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent.
Investments	Investments Our broker-dealer subsidiaries report changes in fair value of marketable and non-marketable securities in other income in the consolidated statements of operations. The fair value of marketable investments is generally based on either quoted market or dealer prices. The fair value of non-marketable securities is based on management’s estimate using the best information available, which generally consists of quoted market prices for similar securities and internally developed discounted cash flow models. Investments in the consolidated statements of financial condition contain investments in securities that are marketable and securities that are not readily marketable. These investments are not included in our broker-dealer trading inventory or available-for-sale or held-to-maturity portfolios and represent the acquiring and disposing of debt or equity instruments for our benefit.
Fixed Assets, Net	Fixed Assets, Net Office equipment is depreciated on a straight-line basis over the estimated useful life of the asset of two to seven years. Leasehold improvements are amortized on a straight-line basis over the lesser of the estimated useful life of the asset or the term of the lease. Buildings and building improvements are amortized on a straight-line basis over the estimated useful life of the asset of three to thirty-nine years. Depreciation expense is recorded in occupancy and equipment rental in the consolidated statements of operations. Office equipment, leasehold improvements, and property are stated at cost net of accumulated depreciation and amortization in the consolidated statements of financial condition. Fixed assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill represents the cost of acquired businesses in excess of the fair value of the related net assets acquired. We test goodwill for impairment on an annual basis and on an interim basis when certain events or circumstances exist. We test for impairment at the reporting unit level, which is generally at the level of or one level below our company’s business segments. For both the annual and interim tests, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, we determine it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then performing the two-step impairment test is not required. However, if we conclude otherwise, we are then required to perform the first step of the two-step impairment test. Goodwill impairment is determined by comparing the estimated fair value of a reporting unit with its respective carrying value. If the estimated fair value exceeds the carrying value, goodwill at the reporting unit level is not deemed to be impaired. If the estimated fair value is below carrying value, however, further analysis is required to determine the amount of the impairment. Additionally, if the carrying value of a reporting unit is zero or a negative value and it is determined that it is more likely than not the goodwill is impaired, further analysis is required. The estimated fair values of the reporting units are derived based on valuation techniques we believe market participants would use for each of the reporting units. The Company performed impairment testing on October 1, 2018 with no impairment charges resulting from the annual impairment tests. Identifiable intangible assets, which are amortized over their estimated useful lives, are tested for potential impairment whenever events or changes in circumstances suggest that the carrying value of an asset or asset group may not be fully recoverable.
Loan and Advances to Financial Advisors and Other Employees, Net	Loans and Advances to Financial Advisors and Other Employees, Net We offer transition pay, principally in the form of upfront loans, to financial advisors and certain key revenue producers as part of our company’s overall growth strategy. These loans are generally forgiven by a charge to compensation and benefits over a five- to ten-year period if the individual satisfies certain conditions, usually based on continued employment and certain performance standards. We monitor and compare individual financial advisor production to each loan issued to ensure future recoverability. If the individual leaves before the term of the loan expires or fails to meet certain performance standards, the individual is required to repay the balance. In determining the allowance for doubtful receivables from former employees, management considers the facts and circumstances surrounding each receivable, including the amount of the unforgiven balance, the reasons for the terminated employment relationship, and the former employees’ overall financial situation.
Derivative Instruments And Hedging Activities	Derivative Instruments and Hedging Activities We recognize all of our derivative instruments at fair value as either assets or liabilities in the consolidated statements of financial condition. These instruments are recorded in other assets or accounts payable and accrued expenses in the consolidated statements of financial condition and in the operating section of the consolidated statements of cash flows as increases or decreases of other assets and accounts payable and accrued expenses. Our company’s policy is not to offset fair value amounts recognized for derivative instruments and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from derivative instruments recognized at fair value executed with the same counterparty under master netting arrangements. The accounting for changes in the fair value (i.e., gains and losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, further, on the type of hedging relationship. For those derivative instruments that are designated and qualify as hedging instruments, we must also designate the hedging instrument or transaction, based upon the exposure being hedged. For derivative instruments that are designated and qualify as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of accumulated other comprehensive loss, net of tax, and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The remaining gain or loss on the derivative instrument in excess of the cumulative change in the present value of future cash flows of the hedged item, if any, is recognized in current earnings during the period of change. We do not use derivatives for trading or speculative purposes and, at December 31, 2018, all of our derivatives are designated as cash flow hedges. See Note 14 for additional details.
Revenue Recognition	Revenue Recognition Customer securities transactions are recorded on a settlement date basis, with related commission revenues and expenses recorded on a trade date basis. Commission revenues are recorded as the amount charged to the customer, which, in certain cases, may include varying discounts. Principal securities transactions are recorded on a trade date basis. We typically distribute our proprietary equity research products to our client base of institutional investors at no charge. These proprietary equity research products are accounted for as a cost of doing business. Advisory fees from mergers and acquisitions engagements are recognized at a point in time when the related transaction is completed, as the performance obligation is to successfully broker a specific transaction. Advisory expenses had historically been deferred until reimbursed by the client, the related fee revenue was recognized or the engagement was otherwise concluded. Under the new revenue standard, expenses are deferred only to the extent they are explicitly reimbursable by the client and the related revenue has been recognized. All other investment banking advisory related expenses, including expenses incurred related to restructuring assignments, are expensed as incurred. Underwriting expenses had historically been recorded net of client reimbursements and/or netted against revenues. Under the new revenue standard, all investment banking expenses are recognized as non-interest expense in other operating expenses in the consolidated statements of operations and any expense reimbursements are recognized as investment banking revenues (i.e., expenses are no longer recorded net of client reimbursements and are not netted against revenues). Asset management and service fees. We earn management and performance fees in connection with investment advisory services provided to institutional and individual clients. Investment advisory fees are charged based on the value of assets in fee-based accounts and are affected by changes in the balances of client assets due to market fluctuations and levels of net new client assets. Fees are charged either in advance based on fixed rates applied to the value of the customers’ account at the beginning of the period or periodically based on contracted rates and account performance. Contracts can be terminated at any time with no incremental payments due to our company upon termination. If the contract is terminated by the customer fees are prorated for the period and fees charged for the post termination period are refundable to the customer. We earn fees from the investment partnerships that we manage or of which we are a general partner. Such management fees are generally based on the net assets or committed capital of the underlying partnerships. We have agreed, in certain cases, to waive management fees, in lieu of making a cash contribution, in satisfaction of our general partner investment commitments to the investment partnerships. In these cases, we generally recognize our management fee revenues at the time when we are allocated a special profit interest in realized gains from these partnerships.
Direct Financing And Operating Leases	Direct Financing and The net investment in direct financing leases is included in other assets in the consolidated balance sheets and consists of the present values of the sum of the future minimum lease payments and estimated residual value of the leased assets. Revenue consists of interest earned on the net investment and is recognized over the lease term as a constant percentage return thereon. The net investment in property on operating leases is included in fixed assets, net in the consolidated balance sheets. Depreciation is recognized, on the straight-line basis, over the lease term to the estimated residual value. Operating lease revenue is recorded on a straight-line basis and is recognized over the lease term in other income. Estimated residual values are established at lease inception utilizing contract terms, past customer experience, and general market data and are reviewed and adjusted, if necessary, on an annual basis. See Note 3 – Acquisitions for further details. We lease office space and equipment under operating leases. We recognize rent expense related to these operating leases on a straight-line basis over the lease term. The lease term commences on the earlier of the date when we become legally obligated for the rent payments or the date on which we take possession of the property. For tenant improvement allowances and rent holidays, we record a deferred rent liability in accounts payable and accrued expenses in the consolidated statements of financial condition and amortize the deferred rent over the lease term as a reduction to occupancy and equipment rental in the consolidated statements of operations.
Income Taxes	Income Taxes On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (“Tax Legislation”) was signed into law making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of U.S international taxation from a worldwide tax system to a territorial system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. We compute income taxes using the asset and liability method, under which deferred income taxes are provided for the temporary differences between the financial statement carrying amounts and the tax basis of our company’s assets and liabilities. We establish a valuation allowance for deferred tax assets if it is more likely than not that these items will either expire before we are able to realize their benefits, or that future deductibility is uncertain. We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the consolidated financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. We recognize interest and penalties related to uncertain tax positions in provision for income taxes in the consolidated statements of operations. See Note 24 for further information regarding income taxes.
Foreign Currency Translation	Foreign Currency Translation We consolidate our foreign subsidiaries, which have designated their local currency as their functional currency. Assets and liabilities of these foreign subsidiaries are translated at year-end rates of exchange. Revenues and expenses are translated at an average rate for the period. Gains or losses resulting from translating foreign currency financial statements are reflected in accumulated other comprehensive loss, a separate component of Stifel Financial Corp. shareholders’ equity. Gains or losses resulting from foreign currency transactions are included in other income in the consolidated statements of operations.
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance Fair Value Measurement In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The objective of this guidance is to improve the effectiveness of disclosure requirements on fair value measurement by eliminating certain disclosure requirements for fair value measurements for all entities, requiring public entities to disclose certain new information and modifying some disclosure requirements. The accounting update is effective for the fiscal year beginning after December 15, 2019 (January 1, 2020 for our company) and early adoption is permitted. The adoption is not expected to have a material impact on our consolidated financial statements. Derivatives and Hedging In August 2017, the FASB issued ASU 2017-12, “Targeted Improvements to Accounting for Hedging Activities,” which amends the hedge accounting recognition and presentation requirements. The accounting update improves the transparency and understandability of information conveyed to financial statement users by better aligning companies’ hedging relationship to their existing risk management strategies, simplifies the application of hedge accounting and increases transparency regarding the scope and results of hedging program. The accounting update is effective for the fiscal year beginning after December 15, 2018 (January 1, 2019 for our company) and early adoption is permitted. The Company will not early adopt this accounting update. We are currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements. Callable debt securities In March 2017, the FASB issued ASU 2017-08, “Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities,” which shortens the amortization period for the premium on certain callable debt securities to the earliest call date. The amendments are applicable to any purchased individual debt security with an explicit and non-contingent call feature that is callable at a fixed price on a preset date. The accounting update is effective for fiscal years beginning after December 15, 2018 (January 1, 2019 for our company) under a modified retrospective approach and early adoption is permitted. We are evaluating the impact the adoption of this new guidance will have on our consolidated financial statements. Goodwill Impairment Testing In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment,” which simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. Under the accounting update, the annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount, and an impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The accounting update is effective for annual or any interim impairment tests in fiscal years beginning after December 15, 2019 (January 1, 2020 for our company) and early adoption is permitted. We are currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements. Financial Instruments – Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments − Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This accounting update impacts the impairment model for certain financial assets measured at amortized cost by requiring a current expected credit loss (“CECL”) methodology to estimate expected credit losses over the entire life of the financial asset, recorded at inception or purchase. CECL will replace the loss model currently applicable to bank loans, held-to-maturity securities, and other receivables carried at amortized cost. The accounting update also eliminates the concept of other-than-temporary impairment for available-for-sale securities. Impairments on available-for-sale securities will be required to be recognized in earnings through an allowance, when the fair value is less than amortized cost and a credit loss exists or the securities are expected to be sold before recovery of amortized cost. Under the accounting update, there may be an ability to determine there are no expected credit losses in certain circumstances, e.g., based on collateral arrangements for lending and financing transactions or based on the credit quality of the borrower or issuer. Overall, the amendments in this accounting update are expected to accelerate the recognition of credit losses for portfolios where CECL models will be applied. The accounting update is effective for fiscal years beginning after December 15, 2019 (January 1, 2020 for our company) with early adoption permitted as of January 1, 2019. We are in the process of developing credit models with the assistance of third-party vendors and assessing process changes that may be required for accounting, reporting and governance to comply with the new credit standard. We are also currently evaluating the impact of the accounting update, but the adoption is not expected to have a material impact on our consolidated financial statements. Leases In February 2016, the FASB issued ASU 2016-02, “Leases,” (“ASU 2016-02”) that requires for leases longer than one year, a lessee recognize in the statements of financial condition a right-of-use asset, representing the right to use the underlying asset for the lease term, and a lease liability, representing the liability to make lease payments. The accounting update also requires that for finance leases, a lessee recognize interest expense on the lease liability, separately from the amortization of the right-of-use asset in the statements of earnings, while for operating leases, such amounts should be recognized as a combined expense. In addition, this accounting update requires expanded disclosures about the nature and terms of lease agreements. We will adopt ASU 2016-02 utilizing the optional transition approach allowed under ASU 2018-11, “Leases (Topic 842): Targeted Improvements” and applying the package of practical expedients beginning January 1, 2019. This option allows entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. By applying ASU 2016-02 at the adoption date, as opposed to at the beginning of the earliest period presented, our reporting for periods prior to January 1, 2019 will continue to be reported in accordance with Leases (Topic 840). The adoption of this guidance will result in the addition of right-of-use assets and corresponding lease obligations to the consolidated balance sheet and will not have a material impact on the Company’s results of operations or cash flows. Upon adoption, the Company expects to record operating lease right-of-use assets in the range of approximately $600 million to $700 million, representing the present value of future lease payments under operating leases with terms of greater than twelve months, with corresponding operating lease liabilities. These amounts are impacted by certain assumptions around lease renewals and the discount rate used to discount the future lease obligations. We do not believe the standard will materially affect our consolidated statements of income or consolidated statements of cash flows. The standard will have no impact on our debt covenant compliance under our current agreements.
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance Comprehensive Income In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” that provides for the reclassification from accumulated other comprehensive income to retained earnings for stranded effects resulting from the Tax Cuts and Jobs Act of 2017. The accounting update is effective for the fiscal year beginning after December 15, 2018 (January 1, 2019 for our company) and early adoption is permitted. We early adopted the guidance in the update on January 1, 2018. The adoption of the accounting update resulted in a reclassification adjustment of $3.1 million related to cash flow hedges and investment portfolio credit risk in our consolidated financial statements. Statement of Cash Flow In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flow - Restricted Cash,” which adds or clarifies guidance on the classification and presentation of restricted cash in the statement of cash flows. The accounting update is effective for the fiscal year beginning after December 15, 2017. We adopted the guidance in the update on January 1, 2018. The adoption of the accounting update did not have a material impact on our consolidated statement of cash flows. Upon adoption of the accounting update, we recorded an increase of $17.6 million in net cash provided by operating activities and an increase of $153.8 million in net cash used in operating activities for the years ended December 31, 2017 and 2016, respectively, related to reclassifying the changes in our cash segregated for regulatory purposes and restricted cash balance from operating activities to the cash and cash equivalent balances within the consolidated statements of cash flows. In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which amends and clarifies the current guidance to reduce diversity in practice of the classification of certain cash receipts and payments in the consolidated statements of cash flows. The accounting update is effective for the fiscal year beginning after December 31, 2017. We adopted the guidance in the update on January 1, 2018. The adoption of the accounting update did not have a material impact on our consolidated statements of cash flows. Financial Assets and Financial Liabilities In January 2016, the FASB issued ASU 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” that changes the income statement impact of equity investments held by an entity, and the recognition of changes in fair value of financial liabilities when the fair value option is elected. The accounting update also amends certain disclosure requirements associated with the fair value of financial instruments. The accounting update is effective for fiscal years beginning after December 15, 2017. We adopted the guidance in the update on January 1, 2018. The adoption of the accounting update did not have a material impact on our consolidated financial statements. Revenue Recognition In May 2014, the FASB issued ASU 2014-09, “Revenue From Contracts With Customers (Topic 606),” (“ASU 2014-09”) that supersedes current revenue recognition guidance, including most industry-specific guidance. ASU 2014-09, as amended, requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods and services. The guidance also requires additional disclosures regarding the nature, amount, timing, and uncertainty of revenue that is recognized. Effective January 1, 2018, the Company adopted ASU 2014-09, which provides accounting guidance on the recognition of revenues from contracts and requires gross presentation of certain costs that were previously offset against revenue. This change was applied prospectively from January 1, 2018 and there is no impact on our previously presented results. The adoption of the new revenue standard resulted in a reduction of beginning retained earnings of $4.2 million after-tax as a cumulative effect of adoption of an accounting change. The impact of adoption is primarily related to investment banking revenues that were previously recognized in prior periods, which are now being deferred under the new revenue standard. With the adoption of the new revenue recognition standard on January 1, 2018, capital raising and advisory fee revenues are no longer presented net of the related reimbursable deal expenses. As a result, capital raising and advisory fee revenues and other operating expenses are higher in 2018 by an identical $33.8 million, with no impact to net income. The scope of the accounting update does not apply to revenue associated with financial instruments, and as a result, does not have an impact on the elements of our consolidated statements of operations most closely associated with financial instruments, including principal transaction revenues, interest income, and interest expense. Share-Based Payments In March 2016, the FASB issued ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”) that requires an entity to record all excess tax benefits and tax deficiencies as an income tax benefit or expense in the income statement. ASU 2016-09 also requires an entity to elect an accounting policy to either estimate the number of forfeitures or account for forfeitures when they occur. The guidance is effective for fiscal years beginning after December 15, 2016 (January 1, 2017 for our company). We adopted the guidance in the update on January 1, 2017. Cash paid to a tax authority by a company when withholding shares from an employee’s award for tax-withholding purposes are now classified as a financing activity in the accompanying consolidated statement of cash flows (adopted retrospectively). We reclassified $61.6 million from operating activities to financing activities in the accompanying consolidated statement of cash flows for the year ended December 31, 2016 pertaining to shares withheld from employee awards for tax withholding purposes.

Receivables From And Payables_2

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Tables)	12 Months Ended
	Dec. 31, 2018
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Amounts Receivable From Brokers, Dealers, And Clearing Organizations	Amounts receivable from brokers, dealers, and clearing organizations at December 31, 2018 and 2017, included (in thousands) December 31, 2018 2017 Receivables from clearing organizations $ 320,277 $ 270,285 Deposits paid for securities borrowed 109,795 132,776 Securities failed to deliver 85,502 56,046 $ 515,574 $ 459,107
Amounts Payable To Brokers, Dealers, And Clearing Organizations	Amounts payable to brokers, dealers, and clearing organizations at December 31, 2018 and 2017, included (in thousands) December 31, 2018 2017 Deposits received from securities loaned $ 392,163 $ 219,782 Securities failed to receive 27,975 29,297 Payable to clearing organizations 12,161 27,223 $ 432,299 $ 276,302

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value	December 31, 2018 December 31, 2017 Fair value of investments Unfunded commitments Fair value of investments Unfunded commitments Money market funds $ 19,719 $ — $ 77,441 $ — Mutual funds 9,122 — 11,748 — Private equity funds 3,461 1,480 7,677 1,825 Partnership interests 3,976 1,024 5,124 1,330 Total $ 36,278 $ 2,504 $ 101,990 $ 3,155
Fair Value Of Assets And Liabilities Measured On Recurring Basis	December 31, 2018 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 42,121 $ 42,121 $ — $ — U.S. government agency securities 72,532 — 72,532 — Mortgage-backed securities: Agency 564,111 — 564,111 — Non-agency 25,727 — 25,726 1 Asset-backed securities 25,905 — 25,730 175 Corporate securities: Fixed income securities 310,457 1,100 309,357 — Equity securities 57,911 57,125 786 — Sovereign debt 14,063 — 14,063 — State and municipal securities 154,622 — 154,622 — Total financial instruments owned 1,267,449 100,346 1,166,927 176 Available-for-sale securities: U.S. government agency securities 5,215 417 4,798 — State and municipal securities 68,226 — 68,226 — Mortgage-backed securities: Agency 230,408 — 230,408 — Commercial 69,715 — 69,715 — Non-agency 1,219 — 1,219 — Corporate fixed income securities 931,604 — 931,604 — Asset-backed securities 1,764,060 — 1,764,060 — Total available-for-sale securities 3,070,447 417 3,070,030 — Investments: Corporate equity securities 33,046 31,670 1,376 — Auction rate securities: Equity securities 16,632 — — 16,632 Municipal securities 704 — — 704 Other 1,041 — 184 857 Investments measured at NAV 16,559 Total investments 67,982 31,670 1,560 18,193 Cash equivalents measured at NAV 19,719 Derivative contracts (1) 7,683 — 7,683 — $ 4,433,280 $ 132,433 $ 4,246,200 $ 18,369 (1) Included in other assets in the consolidated statements of financial condition. December 31, 2018 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 534,817 $ 534,817 $ — $ — U.S. government agency securities 32,755 — 32,755 — Mortgage-backed securities: Agency 123,456 — 123,456 — Corporate securities: Fixed income securities 208,725 1,289 207,436 — Equity securities 36,117 35,398 719 — Sovereign debt 11,429 — 11,429 — State and municipal securities 7 — 7 — Total financial instruments sold, but not yet purchased $ 947,306 $ 571,504 $ 375,802 $ — Assets and liabilities measured at fair value on a recurring basis as of December 31, 2017, are presented below (in thousands) December 31, 2017 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 13,466 $ 13,466 $ — $ — U.S. government agency securities 147,223 — 147,223 — Mortgage-backed securities: Agency 302,445 — 302,445 — Non-agency 29,356 — 29,355 1 Asset-backed securities 76,752 — 76,395 357 Corporate securities: Fixed income securities 325,471 362 324,867 242 Equity securities 46,802 46,411 138 253 Sovereign debt 32,470 — 32,470 — State and municipal securities 169,699 — 169,699 — Total financial instruments owned 1,143,684 60,239 1,082,592 853 Available-for-sale securities: U.S. government agency securities 4,983 516 4,467 — State and municipal securities 70,559 — 70,559 — Mortgage-backed securities: Agency 305,530 — 305,530 — Commercial 72,488 — 72,488 — Non-agency 1,568 — 1,568 — Corporate fixed income securities 1,211,442 — 1,211,442 — Asset-backed securities 2,106,938 — 2,106,938 — Total available-for-sale securities 3,773,508 516 3,772,992 — Investments: Corporate equity securities 49,978 49,978 — — Auction rate securities: Equity securities 34,789 — — 34,789 Municipal securities 846 — — 846 Other 1,217 — 360 857 Investments measured at NAV 24,549 Total investments 111,379 49,978 360 36,492 Cash equivalents measured at NAV 77,441 Derivative contracts (1) 7,995 — 7,995 — $ 5,114,007 $ 110,733 $ 4,863,939 $ 37,345 (1) Included in other assets in the consolidated statements of financial condition. December 31, 2017 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 442,402 $ 442,402 $ — $ — U.S. government agency securities 10,348 — 10,348 — Mortgage-backed securities: Agency 86,612 — 86,612 — Corporate securities: Fixed income securities 180,755 — 180,755 — Equity securities 38,510 38,070 440 — Sovereign debt 20,236 — 20,236 — Total financial instruments sold, but not yet purchased $ 778,863 $ 480,472 $ 298,391 $ —
Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments	Year Ended December 31, 2018 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Asset-Backed Securities Fixed Income Securities Equity Securities Auction Rate Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2017 $ 1 $ 357 $ 242 $ 253 $ 34,789 $ 846 $ 857 Unrealized gains/(losses): Included in changes in net assets (1) — (164 ) — (130 ) 1,193 8 — Realized gains (1) — — — 21 — — — Purchases — — — — — — — Sales — — — (144 ) — — — Redemptions — (18 ) (242 ) — (19,350 ) (150 ) — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — — — — — Net change — (182 ) (242 ) (253 ) (18,157 ) (142 ) — Balance at December 31, 2018 $ 1 $ 175 $ — $ — $ 16,632 $ 704 $ 857 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. Year Ended December 31, 2017 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Corporate Fixed Income Securities Equity Securities Corporate Equity Securities Auction Rate Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2016 $ 1,082 $ 273 $ 600 $ 3,833 $ 48,689 $ 832 $ 1,240 Unrealized gains/(losses): Included in changes in net assets (1) (260 ) — (88 ) (133 ) 785 14 — Realized gains/(losses) (1) 90 — (259 ) 13 — — (383 ) Purchases — — — — — — — Sales (324 ) — — (120 ) — — — Redemptions (230 ) (31 ) — — — — — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — (3,593 ) (14,685 ) — — Net change (724 ) (31 ) (347 ) (3,833 ) (13,900 ) 14 (383 ) Balance at December 31, 2017 $ 358 $ 242 $ 253 $ — $ 34,789 $ 846 $ 857 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations.
Quantitative Information Related To The Significant Unobservable Inputs Utilized In Level 3 Recurring Fair Value Measurements	Valuation technique Unobservable input Range Weighted average Investments: Auction rate securities: Equity securities Discounted cash flow Discount rate 0.0% - 5.6% 3.2% Workout period 2-3 years 2.4 years Municipal securities Discounted cash flow Discount rate 0.7% - 8.3% 2.8% Workout period 1-4 years 2.0 years
Schedule Of Fair Value Of Financial Instruments	December 31, 2018 December 31, 2017 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 1,936,560 $ 1,936,560 $ 696,283 $ 696,283 Cash segregated for regulatory purposes 132,814 132,814 90,802 90,802 Securities purchased under agreements to resell 699,900 699,900 512,220 512,220 Financial instruments owned 1,267,449 1,267,449 1,143,684 1,143,684 Available-for-sale securities 3,070,447 3,070,447 3,773,508 3,773,508 Held-to-maturity securities 4,218,854 4,122,907 3,698,098 3,710,478 Loans held for sale 205,557 205,557 226,068 226,068 Bank loans 8,517,615 8,565,347 6,947,759 6,953,328 Investments 67,982 67,982 111,379 111,379 Derivative contracts (1) 7,683 7,683 7,995 7,995 Financial liabilities: Securities sold under agreements to repurchase $ 535,394 $ 535,394 $ 233,704 $ 233,704 Bank deposits 15,863,613 14,661,996 13,411,935 12,702,746 Financial instruments sold, but not yet purchased 947,306 947,306 778,863 778,863 Federal Home Loan Bank advances 540,000 540,000 745,000 745,000 Borrowings 180,655 180,655 256,000 256,000 Senior notes 1,015,973 989,790 1,014,940 1,044,768 Debentures to Stifel Financial Capital Trusts 60,000 49,747 67,500 64,962 (1)
Estimated Fair Values Of Financial Instruments Not Measured At Fair Value	December 31, 2018 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 1,916,841 $ 1,916,841 $ — $ — Cash segregated for regulatory purposes 132,814 132,814 — — Securities purchased under agreements to resell 699,900 645,632 54,268 — Held-to-maturity securities 4,122,907 — 3,960,099 162,808 Loans held for sale 205,557 — 205,557 — Bank loans 8,565,347 — 8,565,347 — Financial liabilities: Securities sold under agreements to repurchase $ 535,394 $ 87,273 $ 448,121 $ — Bank deposits 14,661,996 — 14,661,996 — Federal Home Loan Bank advances 540,000 540,000 — — Borrowings 180,655 180,655 — — Senior notes 989,790 989,790 — — Debentures to Stifel Financial Capital Trusts 49,747 — — 49,747 December 31, 2017 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 618,842 $ 618,842 $ — $ — Cash segregated for regulatory purposes 90,802 90,802 — — Securities purchased under agreements to resell 512,220 428,740 83,480 — Held-to-maturity securities 3,710,478 — 3,517,781 192,697 Loans held for sale 226,068 — 226,068 — Bank loans 6,953,328 — 6,953,328 — Financial liabilities: Securities sold under agreements to repurchase $ 233,704 $ 92,278 $ 141,426 $ — Bank deposits 12,702,746 — 12,702,746 — Federal Home Loan Bank advances 745,000 745,000 — — Borrowings 256,000 256,000 — — Senior notes 1,044,768 1,044,768 — — Debentures to Stifel Financial Capital Trusts 64,962 — — 64,962

Financial Instruments Owned A_2

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables)	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased	The components of financial instruments owned and financial instruments sold, but not yet purchased, at December 31, 2018 and 2017, are as follows (in thousands) December 31, 2018 2017 Financial instruments owned: U.S. government securities $ 42,121 $ 13,466 U.S. government agency securities 72,532 147,223 Mortgage-backed securities: Agency 564,111 302,445 Non-agency 25,727 29,356 Asset-backed securities 25,905 76,752 Corporate securities: Fixed income securities 310,457 325,471 Equity securities 57,911 46,802 Sovereign debt 14,063 32,470 State and municipal securities 154,622 169,699 $ 1,267,449 $ 1,143,684 Financial instruments sold, but not yet purchased: U.S. government securities $ 534,817 $ 442,402 U.S. government agency securities 32,755 10,348 Mortgage-backed securities: Agency 123,456 86,612 Corporate securities: Fixed income securities 208,725 180,755 Equity securities 36,117 38,510 Sovereign debt 11,429 20,236 State and municipal securities 7 — $ 947,306 $ 778,863

Available-For-Sale And Held-T_2

Available-For-Sale And Held-To-Maturity Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Schedule Of Amortized Cost And Fair Values Of Available For Sale Securities And Held To Maturity Securities	The following tables provide a summary of the amortized cost and fair values of the available-for-sale securities and held-to-maturity securities at December 31, 2018 and 2017 (in thousands) December 31, 2018 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,237 $ 13 $ (35 ) $ 5,215 State and municipal securities 72,487 — (4,261 ) 68,226 Mortgage-backed securities: Agency 234,292 88 (3,972 ) 230,408 Commercial 74,411 4 (4,700 ) 69,715 Non-agency 1,245 — (26 ) 1,219 Corporate fixed income securities 958,406 — (26,802 ) 931,604 Asset-backed securities 1,779,496 672 (16,108 ) 1,764,060 $ 3,125,574 $ 777 $ (55,904 ) $ 3,070,447 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,198,442 $ 1,307 $ (31,689 ) $ 1,168,060 Commercial 51,524 185 — 51,709 Asset-backed securities 2,968,888 4,585 (70,335 ) 2,903,138 $ 4,218,854 $ 6,077 $ (102,024 ) $ 4,122,907 December 31, 2017 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 5,022 $ — $ (39 ) $ 4,983 State and municipal securities 74,691 — (4,132 ) 70,559 Mortgage-backed securities: Agency 308,409 102 (2,981 ) 305,530 Commercial 75,548 28 (3,088 ) 72,488 Non-agency 1,568 — — 1,568 Corporate fixed income securities 1,213,262 3,832 (5,652 ) 1,211,442 Asset-backed securities 2,098,958 12,877 (4,897 ) 2,106,938 $ 3,777,458 $ 16,839 $ (20,789 ) $ 3,773,508 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,334,833 $ 13,621 $ (16,208 ) $ 1,332,246 Commercial 58,971 1,313 — 60,284 Asset-backed securities 2,264,283 15,526 (1,862 ) 2,277,947 Corporate fixed income securities 40,011 27 (37 ) 40,001 $ 3,698,098 $ 30,487 $ (18,107 ) $ 3,710,478 (1) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss. (2) Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.
Schedule Of Amortized Cost And Fair Values Of Debt Securities By Contractual Maturity	The table below summarizes the amortized cost and fair values of debt securities by contractual maturity (in thousands) December 31, 2018 Available-for-sale securities Held-to-maturity securities Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Debt securities Within one year $ 5,872 $ 5,855 $ — $ — After one year through three years 233,969 227,818 — — After three years through five years 406,184 396,046 — — After five years through ten years 463,765 452,622 366,667 364,758 After ten years 1,705,836 1,686,764 2,602,221 2,538,380 Mortgage-backed securities After one year through three years 132 133 51,524 51,709 After three years through five years 1,323 1,326 — — After five years through ten years 5,801 5,820 170,050 165,858 After ten years 302,692 294,063 1,028,392 1,002,202 $ 3,125,574 $ 3,070,447 $ 4,218,854 $ 4,122,907
Contractual Maturities	The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at December 31, 2018, are as follows (in thousands) Within 1 Year 1-5 Years 5-10 Years After 10 Years Total Available-for-sale: (1) U.S. government agency securities $ 1,534 $ 3,681 $ — $ — $ 5,215 State and municipal securities 80 — 18,199 49,947 68,226 Mortgage-backed securities: Agency — 1,460 5,820 223,128 230,408 Commercial — — — 69,715 69,715 Non-agency — — — 1,219 1,219 Corporate fixed income securities 4,241 620,182 307,181 — 931,604 Asset-backed securities — — 127,242 1,636,818 1,764,060 $ 5,855 $ 625,323 $ 458,442 $ 1,980,827 $ 3,070,447 Held-to-maturity: Mortgage-backed securities: Agency $ — $ — $ 170,050 $ 1,028,392 $ 1,198,442 Commercial — 51,524 — — 51,524 Asset-backed securities — — 366,667 2,602,221 2,968,888 $ — $ 51,524 $ 536,717 $ 3,630,613 $ 4,218,854 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time	The following table shows the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses, aggregated by investment category and length of time the individual investment securities have been in continuous unrealized loss positions, at December 31, 2018 (in thousands) Less than 12 months 12 months or more Total Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Available-for-sale securities U.S. government securities $ (35 ) $ 3,752 — — $ (35 ) $ 3,752 State and municipal securities — — (4,261 ) 68,146 (4,261 ) 68,146 Mortgage-backed securities: Agency (186 ) 16,124 (3,786 ) 188,069 (3,972 ) 204,193 Commercial — — (4,700 ) 68,850 (4,700 ) 68,850 Non-agency (26 ) 1,214 — — (26 ) 1,214 Corporate fixed income securities (5,619 ) 351,344 (21,183 ) 580,260 (26,802 ) 931,604 Asset-backed securities (16,108 ) 1,348,927 — — (16,108 ) 1,348,927 $ (21,974 ) $ 1,721,361 $ (33,930 ) $ 905,325 $ (55,904 ) $ 2,626,686 Held-to-maturity securities Mortgage-backed securities: Agency $ (3,511 ) $ 311,010 $ (28,178 ) $ 714,949 $ (31,689 ) $ 1,025,959 Asset-backed securities (68,308 ) 2,579,117 (2,027 ) 42,712 (70,335 ) 2,621,829 $ (71,819 ) $ 2,890,127 $ (30,205 ) $ 757,661 $ (102,024 ) $ 3,647,788

Bank Loans (Tables)

Bank Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio	December 31, 2018 December 31, 2017 Balance Percent Balance Percent Commercial and industrial $ 3,304,234 38.5 % $ 2,437,938 34.8 % Residential real estate 2,875,014 33.5 2,593,576 37.0 Securities-based loans 1,786,966 20.8 1,819,206 25.9 Commercial real estate 318,961 3.7 116,258 1.7 Construction and land 138,245 1.6 7,896 0.1 Home equity lines of credit 38,098 0.4 15,039 0.2 Other 120,129 1.5 24,508 0.3 Gross bank loans 8,581,647 100.0 % 7,014,421 100.0 % Unamortized loan premium/(discount), net (12,155 ) 788 Loans in process 27,984 (856 ) Unamortized loan fees, net 5,972 872 Allowance for loan losses (85,833 ) (67,466 ) Bank loans, net $ 8,517,615 $ 6,947,759
Activity In The Allowance For Loan Losses By Portfolio Segment	Year Ended December 31, 2018 Beginning Balance Provision Charge- offs Recoveries Ending Balance Commercial and industrial $ 54,474 $ 13,896 $ (12 ) $ 9 $ 68,367 Residential real estate 8,430 2,798 — — 11,228 Securities-based loans 2,088 (110 ) — — 1,978 Commercial real estate 1,520 258 — — 1,778 Construction and land 100 1,141 — — 1,241 Home equity lines of credit 162 145 — 3 310 Other 16 71 (2 ) 3 88 Qualitative 676 167 — — 843 $ 67,466 $ 18,366 $ (14 ) $ 15 $ 85,833 Year Ended December 31, 2017 Beginning Balance Provision Charge- offs Recoveries Ending Balance Commercial and industrial $ 35,127 $ 19,666 $ (355 ) $ 36 $ 54,474 Residential real estate 2,660 5,770 — — 8,430 Securities-based loans 3,094 (1,006 ) — — 2,088 Commercial real estate 1,363 2,860 (2,703 ) — 1,520 Home equity lines of credit 371 (212 ) — 3 162 Construction and land 232 (132 ) — — 100 Other 129 (115 ) — 2 16 Qualitative 2,187 (1,511 ) — — 676 $ 45,163 $ 25,320 $ (3,058 ) $ 41 $ 67,466
Unpaid Principal Balances Of Loans And Amount Of Allowance Allocated Based Upon Impairment Method By Portfolio Segment	Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial and industrial $ 8,678 $ 59,689 $ 68,367 $ 23,677 $ 3,280,557 $ 3,304,234 Residential real estate 24 11,204 11,228 519 2,874,495 2,875,014 Securities-based loans — 1,978 1,978 — 1,786,966 1,786,966 Commercial real estate — 1,778 1,778 — 318,961 318,961 Construction and land — 1,241 1,241 — 138,245 138,245 Home equity lines of credit — 310 310 184 37,914 38,098 Other 1 87 88 21 120,108 120,129 Qualitative — 843 843 — — — $ 8,703 $ 77,130 $ 85,833 $ 24,401 $ 8,557,246 $ 8,581,647 Allowance for Loan Losses Recorded Investment in Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Residential real estate $ 24 $ 8,406 $ 8,430 $ 171 $ 2,593,405 $ 2,593,576 Commercial and industrial 9,059 45,415 54,474 28,856 2,409,082 2,437,938 Securities-based loans — 2,088 2,088 — 1,819,206 1,819,206 Commercial real estate — 1,520 1,520 — 116,258 116,258 Home equity lines of credit 20 142 162 184 14,855 15,039 Construction and land — 100 100 — 7,896 7,896 Other 2 14 16 2 24,506 24,508 Qualitative — 676 676 — — — $ 9,105 $ 58,361 $ 67,466 $ 29,213 $ 6,985,208 $ 7,014,421
Loans That Were Individually Evaluated For Impairment By Portfolio Segment	December 31, 2018 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 23,677 $ 242 $ 23,435 $ 23,677 $ 8,678 $ 23,807 Residential real estate 544 352 167 519 24 275 Home equity lines of credit 184 184 — 184 — 184 Other 694 11 10 21 1 70 Total $ 25,099 $ 789 $ 23,612 $ 24,401 $ 8,703 $ 24,336 December 31, 2017 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 28,856 $ 5,211 $ 23,645 $ 28,856 $ 9,059 $ 30,277 Home equity lines of credit 184 — 184 184 20 300 Residential real estate 171 — 171 171 24 174 Other 677 — 2 2 2 5 Total $ 29,888 $ 5,211 $ 24,002 $ 29,213 $ 9,105 $ 30,756
Aging Of The Recorded Investment In Past Due Loans	December 31, 2018 30-89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Commercial and industrial $ — $ 14,656 $ 14,656 $ 3,289,578 3,304,234 Residential real estate 6,970 377 7,347 2,867,667 2,875,014 Securities-based loans — — — 1,786,966 1,786,966 Commercial real estate — — — 318,961 318,961 Construction and land — — — 138,245 138,245 Home equity lines of credit 33 — 33 38,065 38,098 Other — 134 134 119,995 120,129 Total $ 7,003 $ 15,167 $ 22,170 $ 8,559,477 $ 8,581,647 December 31, 2018 * Non-accrual Restructured Total Commercial and industrial $ 14,741 $ 8,936 $ 23,677 Residential real estate 352 167 519 Home equity lines of credit 184 — 184 Other 21 — 21 Total $ 15,298 $ 9,103 $ 24,401 * There were no loans past due 90 days and still accruing interest at December 31, 2018. December 31, 2017 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Residential real estate $ 7,892 $ — $ 7,892 $ 2,585,684 2,593,576 Commercial and industrial 11,883 — 11,883 2,426,055 2,437,938 Securities-based loans — — — 1,819,206 1,819,206 Commercial real estate — — — 116,258 116,258 Home equity lines of credit 184 — 184 14,855 15,039 Construction and land — — — 7,896 7,896 Other 2 — 2 24,506 24,508 Total $ 19,961 $ — $ 19,961 $ 6,994,460 $ 7,014,421 December 31, 2017 * Non-accrual Restructured Total Commercial and industrial $ 19,904 $ 8,952 $ 28,856 Home equity lines of credit 184 — 184 Residential real estate — 171 171 Other 2 — 2 Total $ 20,090 $ 9,123 $ 29,213 * There were no loans past due 90 days and still accruing interest at December 31, 2017.
Risk Category Of Loan Portfolio	December 31, 2018 Pass Special Mention Substandard Doubtful Total Commercial and industrial $ 3,254,698 $ 34,795 $ 14,741 $ — $ 3,304,234 Residential real estate 2,874,495 — 519 — 2,875,014 Securities-based loans 1,786,966 — — — 1,786,966 Commercial real estate 318,961 — — — 318,961 Construction and land 138,245 — — — 138,245 Home equity lines of credit 37,914 — 184 — 38,098 Other 119,912 196 — 21 120,129 Total $ 8,531,191 $ 34,991 $ 15,444 $ 21 $ 8,581,647 December 31, 2017 Pass Special Mention Substandard Doubtful Total Residential real estate $ 2,593,096 $ 309 $ 171 $ — 2,593,576 Commercial and industrial 2,385,152 22,443 30,343 — 2,437,938 Securities-based loans 1,819,206 — — — 1,819,206 Commercial real estate 116,258 — — — 116,258 Home equity lines of credit 14,855 — 184 — 15,039 Construction and land 7,896 — — — 7,896 Other 24,506 — 2 — 24,508 Total $ 6,960,969 $ 22,752 $ 30,700 $ — $ 7,014,421

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Summary Of Fixed Assets	The following is a summary of fixed assets as of December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 Furniture and equipment $ 251,542 $ 225,553 Aircraft operating leases 214,065 — Building and leasehold improvements 180,743 168,684 646,350 394,237 Less accumulated depreciation and amortization (273,411 ) (239,117 ) $ 372,939 $ 155,120
Summary Of Minimum Future Payments	As of December 31, 2018, minimum future payments under non-cancelable leases were (in thousands) 2019 $ 19,417 2020 15,813 2021 12,877 2022 6,614 2023 3,040 Thereafter 4,565 $ 62,326 Future minimum commitments under non-cancelable operating leases at December 31, 2018, are as follows (in thousands) 2019 $ 89,887 2020 81,899 2021 66,887 2022 59,353 2023 50,916 Thereafter 107,678 $ 456,620

Goodwill And Intangible Assets

Goodwill And Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying Amount Of Goodwill And Intangible Assets	Error extracting Word content The carrying amount of goodwill and intangible assets attributable to each of our reporting segments is presented in the following table (in thousands) December 31, 2017 Net Additions Write-off December 31, 2018 Goodwill Global Wealth Management $ 276,477 $ 63,918 $ — $ 340,395 Institutional Group 692,357 1,927 — 694,284 $ 968,834 $ 65,845 $ — $ 1,034,679 December 31, 2017 Net Additions Amortization December 31, 2018 Intangible assets Global Wealth Management $ 44,525 $ 21,780 $ (5,773 ) $ 60,532 Institutional Group 65,102 805 (6,784 ) 59,123 $ 109,627 $ 22,585 $ (12,557 ) $ 119,655
Intangible Assets Subject To Amortization	Intangible assets subject to amortization as of December 31, 2018 and 2017 were as follows (in thousands) December 31, 2018 December 31, 2017 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 160,745 $ 65,254 $ 146,986 $ 55,809 Trade name 24,713 11,755 24,713 10,228 Core deposits 8,615 816 — — Non-compete agreements 2,603 1,452 2,598 1,202 Investment banking backlog 1,431 1,293 1,419 968 $ 198,107 $ 80,570 $ 175,716 $ 68,207
Amortization Expense In Future Periods	As of December 31, 2018, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year 2019 $ 13,737 2020 13,164 2021 12,310 2022 11,494 2023 10,673 Thereafter 56,159 $ 117,537

Senior Notes (Tables)

Senior Notes (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Senior Notes	The following table summarizes our senior notes as of December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 4.250% senior notes, due 2024 (1) $ 500,000 $ 500,000 3.50% senior notes, due 2020 (2) 300,000 300,000 5.20% senior notes, due 2047 (3) 225,000 225,000 1,025,000 1,025,000 Debt issuance costs, net (9,027 ) (10,060 ) Senior notes, net $ 1,015,973 $ 1,014,940 ( 1) In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.250% senior notes due July 2024. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. In July 2016, we issued an additional $200.0 million in aggregate principal amount of 4.25% senior notes due 2024. (2) In December 2015, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 3.50% senior notes due December 2020. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. (3)
Schedule of Corporate Date Maturity	Our senior notes mature as follows, based upon contractual terms (in thousands) 2019 $ — 2020 300,000 2021 — 2022 — 2023 — Thereafter 725,000 $ 1,025,000

Bank Deposits (Tables)

Bank Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Schedule Of Deposits	Deposits consist of money market and savings accounts, certificates of deposit, and demand deposits. Deposits at December 31, 2018 and 2017 were as follows (in thousands) December 31, 2018 2017 Money market and savings accounts $ 13,609,612 $ 13,219,675 Certificates of deposit 1,763,336 1,575 Demand deposits (interest-bearing) 392,765 184,829 Demand deposits (non-interest-bearing) 97,900 5,856 $ 15,863,613 $ 13,411,935
Schedule of Maturities of Certificates of Deposit	Scheduled maturities of certificates of deposit at December 31, 2018 and 2017 were as follows (in thousands) December 31, 2018 2017 Certificates of deposit, less than $100,000: Within one year $ 27,440 $ 438 One to three years 38,550 148 Three to five years 15,511 — $ 81,501 $ 586 Certificates of deposit, $100,000 and greater: Within one year $ 1,513,202 $ 651 One to three years 157,232 338 Three to five years 11,401 — 1,681,835 989 $ 1,763,336 $ 1,575

Derivative Instruments And He_2

Derivative Instruments And Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2018
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Schedule Of Notional Values And Fair Values Of Derivative Instruments	The following table provides the notional values and fair values of our derivative instruments as of December 31, 2018 and 2017 (in thousands) December 31, 2018 Asset Derivatives Notional Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments under Topic 815: Cash flow interest rate contracts $ 540,000 Other assets $ 7,683 December 31, 2017 Asset Derivatives Notional Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments under Topic 815: Cash flow interest rate contracts $ 540,000 Other assets $ 7,995
Schedule Of Derivative Instruments In Consolidated Statements Of Operations	The following table shows the effect of our company’s derivative instruments in the consolidated statements of operations for the years ended December 31, 2018, 2017, and 2016 (in thousands) Year Ended December 31, 2018 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Gain/(Loss) Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ (3,876 ) Interest Expense $ 4,947 Interest Expense $ — Year Ended December 31, 2017 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Gain/(Loss) Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 1,085 Interest Expense $ (635 ) Interest Expense $ — Year Ended December 31, 2016 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Gain/(Loss) Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 6,383 Interest expense $ (5,444 ) Interest expense $ 30

Debentures To Stifel Financia_2

Debentures To Stifel Financial Capital Trusts (Tables)	12 Months Ended
	Dec. 31, 2018
Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust [Abstract]
Debentures To Stifel Financial Capital Trusts	The following table summarizes our debentures to Stifel Financial Capital Trusts as of December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 Debenture to Stifel Financial Capital Trust II (1) $ 20,000 $ 20,000 Debenture to Stifel Financial Capital Trust III (2) 35,000 35,000 Debenture to Stifel Financial Capital Trust IV (3) 5,000 12,500 $ 60,000 $ 67,500 (1) On August 12, 2005, we completed a private placement of $35.0 million of 6.38% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust II (the “Trust II”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 30, 2035, but may be redeemed by our company, and in turn, the Trust II would call the debenture beginning September 30, 2010. The Trust II requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.70% per annum. During 2016, we extinguished $15.0 million of the Trust II debentures. (2) On March 30, 2007, we completed a private placement of $35.0 million of 6.79% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust III (the “Trust III”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on June 6, 2037, but may be redeemed by our company, and in turn, Trust III would call the debenture beginning June 6, 2012. Trust III requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum. (3) On June 28, 2007, we completed a private placement of $35.0 million of 6.78% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust IV (the “Trust IV”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 6, 2037, but may be redeemed by our company, and in turn, Trust IV would call the debenture beginning September 6, 2012. Trust IV requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum.

Disclosures About Offsetting _2

Disclosures About Offsetting Assets And Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Offsetting [Abstract]
Financial Assets And Derivative Assets That Are Subject to Offset	The following table provides information about financial assets and derivative assets that are subject to offset as of December 31, 2018 and 2017 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Assets Gross Amounts Offset in the of Financial Condition Net Amounts Presented in the Statement of Financial Condition Amounts available for offset Available collateral Net Amount As of December 31, 2018: Securities borrowing (1) $ 109,795 $ — $ 109,795 $ (57,328 ) $ (45,005 ) $ 7,462 Reverse repurchase agreements (2) 699,900 — 699,900 (365,822 ) (329,740 ) 4,338 Cash flow interest rate contracts 7,683 — 7,683 — — 7,683 $ 817,378 $ — $ 817,378 $ (423,150 ) $ (374,745 ) $ 19,483 As of December 31, 2017: Securities borrowing (1) $ 132,776 $ — $ 132,776 $ (78,474 ) $ (37,248 ) $ 17,054 Reverse repurchase agreements (2) 512,220 — 512,220 (233,624 ) (266,008 ) 12,588 Cash flow interest rate contracts 7,995 — 7,995 — — 7,995 $ 652,991 $ — $ 652,991 $ (312,098 ) $ (303,256 ) $ 37,637 (1) Securities borrowing transactions are included in receivables from brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 4 in the notes to consolidated financial statements for additional information on receivables from brokers, dealers, and clearing organizations. (2) Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively.
Financial Liabilities And Derivative Liabilities That Are Subject To Offset	The following table provides information about financial liabilities and derivative liabilities that are subject to offset as of December 31, 2018 and 2017 (in thousands) Gross amounts not offset in the Statement of Financial Condition Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Condition Net Amounts Presented in the Statement of Financial Condition Amounts available for offset Collateral Pledged Net Amount As of December 31, 2018: Securities lending (3) $ (392,163 ) $ — $ (392,163 ) $ 57,328 $ 325,110 $ (9,725 ) Repurchase agreements (4) (535,394 ) — (535,394 ) 365,822 169,572 — $ (927,557 ) $ — $ (927,557 ) $ 423,150 $ 494,682 $ (9,725 ) As of December 31, 2017: Securities lending (3) $ (219,782 ) $ — $ (219,782 ) $ 78,474 $ 133,772 $ (7,536 ) Repurchase agreements (4) (233,704 ) — (233,704 ) 233,624 80 — $ (453,486 ) $ — $ (453,486 ) $ 312,098 $ 133,852 $ (7,536 ) (3) Securities lending transactions are included in payables to brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 4 in the notes to consolidated financial statements for additional information on payables to brokers, dealers, and clearing organizations. (4) Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Commitments, Guarantees And Con

Commitments, Guarantees And Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary Of Minimum Future Payments	As of December 31, 2018, minimum future payments under non-cancelable leases were (in thousands) 2019 $ 19,417 2020 15,813 2021 12,877 2022 6,614 2023 3,040 Thereafter 4,565 $ 62,326 Future minimum commitments under non-cancelable operating leases at December 31, 2018, are as follows (in thousands) 2019 $ 89,887 2020 81,899 2021 66,887 2022 59,353 2023 50,916 Thereafter 107,678 $ 456,620

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2018
Regulatory Capital Requirements [Abstract]
Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios	Stifel Financial Corp. – Federal Reserve Capital Amounts December 31, 2018 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,939,938 16.8 % $ 520,718 4.5 % $ 752,148 6.5 % Tier 1 capital 2,103,339 18.2 % 694,291 6.0 % 925,721 8.0 % Total capital 2,247,937 19.4 % 925,721 8.0 % 1,157,152 10.0 % Tier 1 leverage 2,103,339 9.3 % 904,735 4.0 % 1,130,919 5.0 % Stifel Bank & Trust – Federal Reserve Capital Amounts December 31, 2018 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 1,163,514 14.4 % $ 363,956 4.5 % $ 525,714 6.5 % Tier 1 capital 1,176,915 14.6 % 485,274 6.0 % 647,032 8.0 % Total capital 1,262,361 15.6 % 647,032 8.0 % 808,790 10.0 % Tier 1 leverage 1,176,915 7.1 % 658,602 4.0 % 823,252 5.0 % Stifel Bank– Federal Reserve Capital Amounts December 31, 2018 Actual For Capital Adequacy Purposes To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Common equity tier 1 capital $ 77,244 12.3 % $ 28,324 4.5 % $ 40,913 6.5 % Tier 1 capital 77,244 12.3 % 37,766 6.0 % 50,354 8.0 % Total capital 85,117 13.5 % 50,354 8.0 % 62,943 10.0 % Tier 1 leverage 77,244 9.9 % 31,113 4.0 % 38,892 5.0 %

Revenues from Contracts with _2

Revenues from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Schedule of Total Revenues Separated between Revenues from Contracts with Customers and Other Sources of Revenues	The following table presents the Company’s total revenues separated between revenues from contracts with customers and other sources of revenues for the year ended December 31, 2018 (in thousands): Year Ended December 31, 2018 Revenues from contracts with customers: Commissions $ 657,732 Investment banking 707,670 Asset management and service fees 806,175 Other 15,568 Total revenue from contracts with customers 2,187,145 Other sources of revenue: Interest 646,449 Principal transactions 351,378 Other 9,985 Total revenues $ 3,194,957
Revenues from Contracts with Customers Disaggregated by Major Business Activity and Primary Geographic Regions	The following tables present the Company’s revenues from contracts with customers by reportable segment disaggregated by major business activity and primary geographic regions for the year ended December 31, 2018 (in thousands) Year Ended December 31, 2018 Global Wealth Management Institutional Group Other Total Major business activity: Commissions $ 472,135 $ 185,597 $ — $ 657,732 Investment banking - capital raising 31,293 304,895 — 336,188 Investment banking - advisory fees 81 371,401 — 371,482 Asset management 806,132 43 — 806,175 Other 11,625 — 3,943 15,568 Total 1,321,266 861,936 3,943 2,187,145 Primary Geographic Region: United States 1,321,266 725,251 3,943 2,050,460 Europe — 130,979 — 130,979 Other — 5,706 — 5,706 $ 1,321,266 $ 861,936 $ 3,943 $ 2,187,145

Interest Income And Interest _2

Interest Income And Interest Expense (Tables)	12 Months Ended
	Dec. 31, 2018
Banking And Thrift Interest [Abstract]
Components Of Interest Income And Interest Expense	The components of interest income and interest expense are as follows (in thousands) Year Ended December 31, 2018 2017 2016 Interest income: Bank loans, net $ 300,541 $ 206,084 $ 127,923 Investment securities 252,200 187,731 107,454 Margin balances 49,515 37,218 32,147 Financial instruments owned 21,407 17,563 18,965 Other 22,786 5,785 7,843 $ 646,449 $ 454,381 $ 294,332 Interest expense: Bank deposits $ 82,256 $ 12,661 $ 7,331 Senior notes 44,610 35,338 36,217 Federal Home Loan Bank advances 15,173 8,305 6,777 Other 28,037 13,726 16,549 $ 170,076 $ 70,030 $ 66,874

Employee Incentive, Deferred _2

Employee Incentive, Deferred Compensation, And Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Share Based Compensation Allocation And Classification In Financial Statements [Abstract]
Unvested Stock Award Activity	Units Weighted-average grant date fair value Unvested December 31, 2017 13,938 $ 44.31 Granted 2,496 55.94 Vested (2,030 ) 41.18 Cancelled (287 ) 47.98 Unvested December 31, 2018 14,117 $ 46.75

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Provision For Income Taxes/(Benefit)	The provision for income taxes consists of the following (in thousands) Year Ended December 31, 2018 2017 2016 Current taxes: Federal $ 89,971 $ (29,396 ) $ 7,927 State 36,070 (334 ) 5,818 Foreign 99 (1,734 ) 1,255 126,140 (31,464 ) 15,000 Deferred taxes: Federal 11,932 114,842 39,127 State 2,267 1,728 6,261 Foreign 55 1,559 674 14,254 118,129 46,062 Provision for income taxes $ 140,394 $ 86,665 $ 61,062
Reconciliation Of The Statutory Federal Income Tax With The Company's Effective Tax Rate	Reconciliation of the statutory federal income tax rate with our company’s effective income tax rate is as follows (in thousands) Year Ended December 31, 2018 2017 2016 Statutory rate $ 112,215 $ 94,338 $ 49,904 State income taxes, net of federal income tax 30,762 6,721 7,688 Foreign tax rate difference (318 ) (412 ) (1,810 ) Change in uncertain tax position (617 ) 1,544 41 Revaluation of deferred tax assets (3,006 ) 42,443 — Excess tax benefit from stock-based compensation (3,700 ) (57,431 ) — Non-deductible litigation expense — — 7,700 Other, net 5,058 (538 ) (2,461 ) $ 140,394 $ 86,665 $ 61,062
Deferred Tax Assets And Liabilities	Tax effect of temporary differences and carryforwards that comprise significant portions of deferred tax assets and liabilities (in thousands) December 31, 2018 2017 Deferred tax assets: Deferred compensation $ 74,916 $ 71,687 Receivable reserves 30,252 22,679 Net operating loss carryforwards 29,699 31,986 Accrued expenses 19,832 33,957 Unrealized loss on investments 10,635 — Depreciation — 4,012 Other 3,066 — Total deferred tax assets 168,400 164,321 Valuation allowance (3,944 ) (4,285 ) 164,456 160,036 Deferred tax liabilities: Goodwill and other intangibles (42,045 ) (38,982 ) Depreciation (6,629 ) — Prepaid expenses (3,774 ) (2,834 ) Unrealized gain on investments — (11,081 ) Other — (1,987 ) (52,448 ) (54,884 ) Net deferred tax asset $ 112,008 $ 105,152
Unrecognized Tax Benefits	The following table summarizes the activity related to our company’s unrecognized tax benefits from January 1, 2016 to December 31, 2018 (in thousands) Year Ended December 31, 2018 2017 2016 Beginning balance $ 3,180 $ 1,800 $ 2,717 Increase related to prior year tax positions 4 3,036 5 Decrease related to prior year tax positions (33 ) (287 ) (31 ) Increase related to current year tax positions 191 — — Decrease related to settlements with taxing authorities (3,030 ) (171 ) (42 ) Decrease related to lapsing of statute of limitations — (1,198 ) — Increase/(decrease) related to business acquisitions — — (849 ) Ending balance $ 312 $ 3,180 $ 1,800

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule Of Operating Information, Segment	Information concerning operations in these segments of business for the years ended December 31, 2018, 2017, and 2016, is as follows (in thousands) Year Ended December 31, 2018 2017 2016 Net revenues: (1) Global Wealth Management $ 1,990,319 $ 1,822,218 $ 1,563,410 Institutional Group 1,055,495 1,110,768 1,014,164 Other (20,933 ) (6,554 ) (2,078 ) $ 3,024,881 $ 2,926,432 $ 2,575,496 Income/(loss) before income taxes: Global Wealth Management $ 737,003 $ 626,906 $ 430,318 Institutional Group 157,051 217,981 164,143 Other (359,692 ) (575,351 ) (451,879 ) $ 534,362 $ 269,536 $ 142,582 (1) No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2018, 2017, and 2016.
Schedule Of Information Of Total Assets On Segment Basis	The following table presents our company’s total assets on a segment basis at December 31, 2018 and 2017 (in thousands) December 31, 2018 2017 Global Wealth Management $ 21,040,224 $ 17,717,617 Institutional Group 3,238,617 3,313,304 Other 240,757 353,032 $ 24,519,598 $ 21,383,953
Schedule Of Net Revenues Earned On Major Geographical Areas	Revenues, classified by the major geographic areas in which they were earned for the years ended December 31, 2018, 2017, and 2016, were as follows (in thousands): Year Ended December 31, 2018 2017 2016 United States $ 2,855,955 $ 2,783,175 $ 2,429,714 United Kingdom 156,557 129,288 132,622 Other 12,369 13,969 13,160 $ 3,024,881 $ 2,926,432 $ 2,575,496

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Computation Of Basic And Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the years ended December 31, 2018, 2017, and 2016 (in thousands, except per share data) Year Ended December 31, 2018 2017 2016 Net income $ 393,968 $ 182,871 $ 81,520 Preferred dividends 9,375 9,375 3,906 Net income available to common shareholders $ 384,593 $ 173,496 $ 77,614 Shares for basic and diluted calculation: Average shares used in basic computation 71,786 68,562 66,871 Dilutive effect of stock options and units (1) 9,535 12,473 10,692 Average shares used in diluted computation 81,321 81,035 77,563 Earnings per common share: Basic $ 5.36 $ 2.53 $ 1.16 Diluted $ 4.73 $ 2.14 $ 1.00 (1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Diluted earnings per share include stock options and units.

Quarterly Financial Informati_2

Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Year Ended December 31, 2018 (in thousands, except per share amounts) 1 st 2 nd 3 rd 4 th Operating revenues $ 639,077 $ 625,590 $ 617,050 $ 666,791 Interest income 137,734 154,421 169,760 184,534 Total revenues 776,811 780,011 786,810 851,325 Interest expense 26,453 37,279 48,468 57,876 Net revenues 750,358 742,732 738,342 793,449 Total non-interest expenses 630,804 624,385 597,812 637,518 Income before income tax expense 119,554 118,347 140,530 155,931 Provision for income taxes 30,793 31,060 36,672 41,869 Net income 88,761 87,287 103,858 114,062 Preferred dividends 2,344 2,344 2,343 2,344 Net income available to common shareholders $ 86,417 $ 84,943 $ 101,515 $ 111,718 Earnings per common share Basic $ 1.20 $ 1.18 $ 1.41 $ 1.56 Diluted $ 1.06 $ 1.04 $ 1.25 $ 1.38 Weighted-average number of common shares outstanding: Basic 71,999 71,692 71,919 71,666 Diluted 81,789 81,299 81,484 80,706 Cash dividends declared per common share $ 0.12 $ 0.12 $ 0.12 $ 0.12 Year Ended December 31, 2017 (in thousands, except per share amounts) 1 st 2 nd 3 rd 4 th Operating revenues $ 590,474 $ 633,340 $ 620,932 $ 697,335 Interest income 100,953 108,951 117,862 126,615 Total revenues 691,427 742,291 738,794 823,950 Interest expense 15,896 16,644 17,625 19,865 Net revenues 675,531 725,647 721,169 804,085 Total non-interest expenses 596,512 642,449 613,030 804,905 Income before income tax expense 79,019 83,198 108,139 (820 ) Provision for income taxes 13,507 30,387 41,603 1,168 Net income 65,512 52,811 66,536 (1,988 ) Preferred dividends 2,344 2,344 2,343 2,344 Net income available to common shareholders $ 63,168 $ 50,467 $ 64,193 $ (4,332 ) Earnings per common share (1) Basic $ 0.92 $ 0.74 $ 0.94 $ (0.06 ) Diluted $ 0.78 $ 0.63 $ 0.79 $ (0.06 ) Weighted-average number of common shares outstanding: Basic 68,386 68,556 68,522 68,782 Diluted 80,695 80,021 80,881 68,782 Cash dividends declared per common share $ — $ — $ 0.10 $ 0.10 (1) Earnings per share for the three months ended December 31, 2017 is calculated using the basic weighted average number of common shares outstanding, not fully dilutive shares, as they are anti-dilutive in periods a loss is incurred.

Nature of Operations And Basi_3

Nature of Operations And Basis of Presentation (Details)	Dec. 31, 2018Air_craft
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of Aircraft engines	23
North Shore Aviation Holdings LLC [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	27.50%
Number of Aircraft engines	5

Summary Of Significant Accoun_3

Summary Of Significant Accounting Policies (Details) - USD ($)	Oct. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Loan impairment threshold period		90 days
Threshold of reporting unit goodwill carrying value for further analysis		$ 0
Goodwill impairment charges	$ 0
Incremental payments due upon termination of contract		$ 0
Corporate tax rate		21.00%	35.00%
Other operating expenses		$ 315,152,000	$ 297,634,000	$ 291,615,000
Shares withheld from employee awards for tax withholding purposes		43,229,000	214,744,000	61,601,000
ASU 2018-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification adjustment related to cash flow hedges and investment portfolio credit risk		3,100,000
ASU 2016-18 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Increase in net cash provided by operating activities			$ 17,600,000	153,800,000
ASU 2014-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative effect on retained earnings		4,200,000
Capital raising and advisory fee revenues		33,800,000
Other operating expenses		33,800,000
Reclassification from Operating Activities to Financing Activities [Member] | ASU No. 2016-09 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Shares withheld from employee awards for tax withholding purposes				$ 61,600,000
Minimum [Member] | ASU 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease, right-of-use asset		600,000,000
Maximum [Member] | ASU 2016-02 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 700,000,000
Office Equipment [Member] | Minimum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Fixed assets, Useful life		2 years
Office Equipment [Member] | Maximum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Fixed assets, Useful life		7 years
Building and Building Improvements [Member] | Minimum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Fixed assets, Useful life		3 years
Building and Building Improvements [Member] | Maximum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Fixed assets, Useful life		39 years

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Details) shares in Millions	Oct. 01, 2018USD ($)	Aug. 31, 2018USD ($)shares	Mar. 19, 2018USD ($)ClientAdvisorState	May 03, 2016USD ($)	Jan. 04, 2016USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jan. 03, 2017USD ($)	Dec. 04, 2015USD ($)
Business Acquisition [Line Items]
Goodwill						$ 1,034,679,000	$ 968,834,000
Restricted stock units, charges at the date of modification							55,900,000
Restricted Stock Units (RSUs) [Member]
Business Acquisition [Line Items]
Restricted stock units, charges at the date of modification								$ 58,600,000
Global Wealth Management [Member]
Business Acquisition [Line Items]
Goodwill						340,395,000	276,477,000
Rand & Associates [Member]
Business Acquisition [Line Items]
Period of contingent consideration	5 years
Liability for earn-out payments						$ 4,100,000
Rand & Associates [Member] | Global Wealth Management [Member]
Business Acquisition [Line Items]
Goodwill	$ 8,300,000
Rand & Associates [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	$ 4,600,000
Business Bancshares, Inc. [Member]
Business Acquisition [Line Items]
Date of acquisition		Aug. 31, 2018
Business acquisition, equity interest issued or issuable, description						Under the terms of the merger agreement, each outstanding share of BBI common stock (except for shares of BBI common stock held by BBI as treasury stock) were converted into the right to receive 0.705 shares of our company’s common stock, with fractional shares settled with cash.
Business combination equity interest exchange ratio		0.705
Shares issued for acquisition | shares		2
Acquisition of loans		$ 507,800,000
Acquisition of other assets		85,700,000
Acquisition of deposits		501,100,000
Acquisition of other liabilities		21,900,000
Business Bancshares, Inc. [Member] | Global Wealth Management [Member]
Business Acquisition [Line Items]
Goodwill		38,400,000
Business Bancshares, Inc. [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		$ 8,600,000
Ziegler [Member]
Business Acquisition [Line Items]
Goodwill			$ 19,000,000
Date of acquisition			Mar. 19, 2018
Number of private client advisors | ClientAdvisor			55
Number of states in which private client advisors operates | State			5
Assets			$ 5,000,000,000
Ziegler [Member] | Customer Relationships and Non-Compete Agreements [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			$ 9,500,000
City Securities Corporation [Member]
Business Acquisition [Line Items]
Goodwill									$ 7,100,000
Identifiable intangible assets									$ 4,100,000
ISM Capital LLP [Member]
Business Acquisition [Line Items]
Goodwill				$ 6,300,000
Identifiable intangible assets				$ 2,300,000
Period of contingent consideration				3 years
Liability for earn-out payments						$ 0	1,900,000
Eaton Partners [Member]
Business Acquisition [Line Items]
Goodwill					$ 72,000,000
Identifiable intangible assets					$ 32,300,000
Period of contingent consideration					4 years
Liability for earn-out payments						40,200,000	31,200,000
Barclays Wealth and Investment Management, Americas [Member]
Business Acquisition [Line Items]
Goodwill										$ 24,800,000
Deferred consideration, recognized as a liability						$ 7,400,000	$ 15,200,000
Barclays Wealth and Investment Management, Americas [Member] | Stifel Bank [Member]
Business Acquisition [Line Items]
Assets										600,000,000
Barclays Wealth and Investment Management, Americas [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Identifiable intangible assets										$ 7,300,000

Receivables From And Payables_3

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Receivable From Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables from clearing organizations	$ 320,277	$ 270,285
Deposits paid for securities borrowed	109,795	132,776
Securities failed to deliver	85,502	56,046
Receivables from brokers, dealers and clearing organizations, Total	$ 515,574	$ 459,107

Receivables From And Payables_4

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Payable To Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Deposits received from securities loaned	$ 392,163	$ 219,782
Securities failed to receive	27,975	29,297
Payable to clearing organizations	12,161	27,223
Payables to broker, dealers and clearing organizations, Total	$ 432,299	$ 276,302

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 36,278	$ 101,990
Unfunded commitments	2,504	3,155
Money Market Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	19,719	77,441
Mutual Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	9,122	11,748
Private Equity Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,461	7,677
Unfunded commitments	1,480	1,825
Partnership Interests [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	3,976	5,124
Unfunded commitments	$ 1,024	$ 1,330

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	$ 1,267,449	$ 1,143,684
Available-for-sale securities	3,070,447	3,773,508
Investments	67,982	111,379
Cash equivalents measured at NAV	19,719	77,441
Derivative contracts, Assets	7,683	7,995
Total Assets	4,433,280	5,114,007
Financial instruments sold, but not yet purchased, at fair value	947,306	778,863
Sovereign Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	14,063	32,470
Financial instruments sold, but not yet purchased, at fair value	11,429	20,236
U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	72,532	147,223
Available-for-sale securities	5,215	4,983
Financial instruments sold, but not yet purchased, at fair value	32,755	10,348
Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	25,905	76,752
Available-for-sale securities	1,764,060	2,106,938
Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	310,457	325,471
Available-for-sale securities	931,604	1,211,442
Financial instruments sold, but not yet purchased, at fair value	208,725	180,755
Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	57,911	46,802
Investments	33,046	49,978
Financial instruments sold, but not yet purchased, at fair value	36,117	38,510
State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	154,622	169,699
Available-for-sale securities	68,226	70,559
Financial instruments sold, but not yet purchased, at fair value	7
Investments In Funds Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	16,559	24,549
Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	16,632	34,789
Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	704	846
Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,041	1,217
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	42,121	13,466
Financial instruments sold, but not yet purchased, at fair value	534,817	442,402
Mortgage Backed Securities [Member] | Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	564,111	302,445
Available-for-sale securities	230,408	305,530
Financial instruments sold, but not yet purchased, at fair value	123,456	86,612
Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	25,727	29,356
Available-for-sale securities	1,219	1,568
Mortgage Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	69,715	72,488
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	100,346	60,239
Available-for-sale securities	417	516
Investments	31,670	49,978
Total Assets	132,433	110,733
Financial instruments sold, but not yet purchased, at fair value	571,504	480,472
Level 1 [Member] | U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	417	516
Level 1 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,100	362
Financial instruments sold, but not yet purchased, at fair value	1,289
Level 1 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	57,125	46,411
Investments	31,670	49,978
Financial instruments sold, but not yet purchased, at fair value	35,398	38,070
Level 1 [Member] | U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	42,121	13,466
Financial instruments sold, but not yet purchased, at fair value	534,817	442,402
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,166,927	1,082,592
Available-for-sale securities	3,070,030	3,772,992
Investments	1,560	360
Derivative contracts, Assets	7,683	7,995
Total Assets	4,246,200	4,863,939
Financial instruments sold, but not yet purchased, at fair value	375,802	298,391
Level 2 [Member] | Sovereign Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	14,063	32,470
Financial instruments sold, but not yet purchased, at fair value	11,429	20,236
Level 2 [Member] | U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	72,532	147,223
Available-for-sale securities	4,798	4,467
Financial instruments sold, but not yet purchased, at fair value	32,755	10,348
Level 2 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	25,730	76,395
Available-for-sale securities	1,764,060	2,106,938
Level 2 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	309,357	324,867
Available-for-sale securities	931,604	1,211,442
Financial instruments sold, but not yet purchased, at fair value	207,436	180,755
Level 2 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	786	138
Investments	1,376
Financial instruments sold, but not yet purchased, at fair value	719	440
Level 2 [Member] | State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	154,622	169,699
Available-for-sale securities	68,226	70,559
Financial instruments sold, but not yet purchased, at fair value	7
Level 2 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	184	360
Level 2 [Member] | Mortgage Backed Securities [Member] | Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	564,111	302,445
Available-for-sale securities	230,408	305,530
Financial instruments sold, but not yet purchased, at fair value	123,456	86,612
Level 2 [Member] | Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	25,726	29,355
Available-for-sale securities	1,219	1,568
Level 2 [Member] | Mortgage Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	69,715	72,488
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	176	853
Investments	18,193	36,492
Total Assets	18,369	37,345
Level 3 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	175	357
Level 3 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		242
Level 3 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned		253
Level 3 [Member] | Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	16,632	34,789
Level 3 [Member] | Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	704	846
Level 3 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	857	857
Level 3 [Member] | Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	$ 1	$ 1

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers, Into Level 3	$ 0
Non-Agency [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1
Ending Balance	1	$ 1
Asset-Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	357
Unrealized gains/(losses), Included in changes in net assets	(164)
Redemptions	(18)
Net change	(182)
Ending Balance	175	357
Equity Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	34,789	48,689
Unrealized gains/(losses), Included in changes in net assets	1,193	785
Redemptions	(19,350)
Transfers, Out of Level 3		(14,685)
Net change	(18,157)	(13,900)
Ending Balance	16,632	34,789
Corporate Fixed Income Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	242	273
Redemptions	(242)	(31)
Net change	(242)	(31)
Ending Balance		242
Auction Rate Municipal Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	846	832
Unrealized gains/(losses), Included in changes in net assets	8	14
Redemptions	(150)
Net change	(142)	14
Ending Balance	704	846
Other Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	857	1,240
Realized gains/(losses)		(383)
Net change		(383)
Ending Balance	857	857
Non-Agency and Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	358	1,082
Unrealized gains/(losses), Included in changes in net assets		(260)
Realized gains/(losses)		90
Sales		(324)
Redemptions		(230)
Net change		(724)
Ending Balance		358
Corporate Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance		3,833
Unrealized gains/(losses), Included in changes in net assets		(133)
Realized gains/(losses)		13
Sales		(120)
Transfers, Out of Level 3		(3,593)
Net change		(3,833)
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	253	600
Unrealized gains/(losses), Included in changes in net assets	(130)	(88)
Realized gains/(losses)	21	(259)
Sales	(144)
Net change	$ (253)	(347)
Ending Balance		$ 253

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments (Quantitative Information related To The Significant Unobservable Inputs Utilized In Company's Level 3 Recurring Fair Value Measurements) (Details) - Discounted Cash Flow [Member]	12 Months Ended
	Dec. 31, 2018
Auction Rate Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Workout period range, low end	2 years
Workout period range, high end	3 years
Discount rate, weighted average	3.20%
Weighted average workout period	2 years 4 months 24 days
Auction Rate Equity Securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	0.00%
Auction Rate Equity Securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	5.60%
Auction Rate Municipal Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Workout period range, low end	1 year
Workout period range, high end	4 years
Discount rate, weighted average	2.80%
Weighted average workout period	2 years
Auction Rate Municipal Securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	0.70%
Auction Rate Municipal Securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	8.30%

Fair Value Of Financial Instr_5

Fair Value Of Financial Instruments (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Fair Value Disclosures [Abstract]
Transfers of financial assets from Level 2 to Level 1	$ 0.9
Transfers of financial assets from Level 1 to Level 2	0.8
Transfers of financial assets into Level 3	$ 0

Fair Value Of Financial Instr_6

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities purchased under agreements to resell	[1]	$ 699,900	$ 512,220
Financial instruments owned		1,267,449	1,143,684
Available-for-sale securities		3,070,447	3,773,508
Held-to-maturity securities	[2]	4,122,907	3,710,478
Investments, at fair value		67,982	111,379
Derivative contracts		7,683	7,995
Securities sold under agreements to repurchase	[3]	535,394	233,704
Bank deposits		15,863,613	13,411,935
Financial instruments sold, but not yet purchased, at fair value		947,306	778,863
Borrowings		180,655	256,000
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1,936,560	696,283
Cash segregated for regulatory purposes		132,814	90,802
Securities purchased under agreements to resell		699,900	512,220
Financial instruments owned		1,267,449	1,143,684
Available-for-sale securities		3,070,447	3,773,508
Held-to-maturity securities		4,218,854	3,698,098
Loans held for sale		205,557	226,068
Bank loans		8,517,615	6,947,759
Investments, at fair value		67,982	111,379
Derivative contracts		7,683	7,995
Securities sold under agreements to repurchase		535,394	233,704
Bank deposits		15,863,613	13,411,935
Financial instruments sold, but not yet purchased, at fair value		947,306	778,863
Federal Home Loan Bank advances		540,000	745,000
Borrowings		180,655	256,000
Senior notes		1,015,973	1,014,940
Debentures to Stifel Financial Capital Trusts		60,000	67,500
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1,936,560	696,283
Cash segregated for regulatory purposes		132,814	90,802
Securities purchased under agreements to resell		699,900	512,220
Financial instruments owned		1,267,449	1,143,684
Available-for-sale securities		3,070,447	3,773,508
Held-to-maturity securities		4,122,907	3,710,478
Loans held for sale		205,557	226,068
Bank loans		8,565,347	6,953,328
Investments, at fair value		67,982	111,379
Derivative contracts		7,683	7,995
Securities sold under agreements to repurchase		535,394	233,704
Bank deposits		14,661,996	12,702,746
Financial instruments sold, but not yet purchased, at fair value		947,306	778,863
Federal Home Loan Bank advances		540,000	745,000
Borrowings		180,655	256,000
Senior notes		989,790	1,044,768
Debentures to Stifel Financial Capital Trusts		$ 49,747	$ 64,962
[1]	Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.
[3]	Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Fair Value Of Financial Instr_7

Fair Value Of Financial Instruments (Estimated Fair Values Of Financial Instruments Not Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	[1]	$ 699,900	$ 512,220
Held-to-maturity securities	[2]	4,122,907	3,710,478
Securities sold under agreements to repurchase	[3]	535,394	233,704
Bank deposits		15,863,613	13,411,935
Borrowings		180,655	256,000
Senior notes		1,015,973	1,014,940
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		1,916,841	618,842
Cash segregated for regulatory purposes		132,814	90,802
Securities purchased under agreements to resell		699,900	512,220
Held-to-maturity securities		4,122,907	3,710,478
Loans held for sale		205,557	226,068
Bank loans		8,565,347	6,953,328
Securities sold under agreements to repurchase		535,394	233,704
Bank deposits		14,661,996	12,702,746
Federal Home Loan Bank advances		540,000	745,000
Borrowings		180,655	256,000
Senior notes		989,790	1,044,768
Debentures to Stifel Financial Capital Trusts		49,747	64,962
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		1,916,841	618,842
Cash segregated for regulatory purposes		132,814	90,802
Securities purchased under agreements to resell		645,632	428,740
Securities sold under agreements to repurchase		87,273	92,278
Federal Home Loan Bank advances		540,000	745,000
Borrowings		180,655	256,000
Senior notes		989,790	1,044,768
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell		54,268	83,480
Held-to-maturity securities		3,960,099	3,517,781
Loans held for sale		205,557	226,068
Bank loans		8,565,347	6,953,328
Securities sold under agreements to repurchase		448,121	141,426
Bank deposits		14,661,996	12,702,746
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities		162,808	192,697
Debentures to Stifel Financial Capital Trusts		$ 49,747	$ 64,962
[1]	Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.
[3]	Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Financial Instruments Owned A_3

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	$ 1,267,449	$ 1,143,684
U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	72,532	147,223
Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	310,457	325,471
Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	57,911	46,802
State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	154,622	169,699
U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	42,121	13,466
Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	14,063	32,470
Securities Sold, But Not yet Purchased [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	947,306	778,863
Securities Sold, But Not yet Purchased [Member] | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	32,755	10,348
Securities Sold, But Not yet Purchased [Member] | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities	208,725	180,755
Securities Sold, But Not yet Purchased [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	36,117	38,510
Securities Sold, But Not yet Purchased [Member] | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities	7
Securities Sold, But Not yet Purchased [Member] | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	534,817	442,402
Securities Sold, But Not yet Purchased [Member] | Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	123,456	86,612
Securities Sold, But Not yet Purchased [Member] | Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Sovereign debt	11,429	20,236
Securities Owned
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Asset-backed securities	25,905	76,752
Financial instruments owned, at fair value	1,267,449	1,143,684
Securities Owned | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	72,532	147,223
Securities Owned | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities	310,457	325,471
Securities Owned | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	57,911	46,802
Securities Owned | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities	154,622	169,699
Securities Owned | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	42,121	13,466
Securities Owned | Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	564,111	302,445
Securities Owned | Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	25,727	29,356
Securities Owned | Sovereign Debt [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Sovereign debt	$ 14,063	$ 32,470

Financial Instruments Owned A_4

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 1,900	$ 2,200
Securities Owned
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 669	$ 810.3

Available-For-Sale And Held-T_3

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of The Available For Sale Securities And Held To Maturity Securities) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		$ 3,125,574	$ 3,777,458
Available for sale securities, unrealized gains	[1]	777	16,839
Available-for-sale Securities, Gross unrealized losses	[1]	(55,904)	(20,789)
Available-for-sale securities		3,070,447	3,773,508
Held-to-maturity Securities, Amortized cost	[2]	4,218,854	3,698,098
Held-to-maturity Securities, Gross unrealized gains	[2]	6,077	30,487
Held-to-maturity Securities, Gross unrealized losses	[2]	(102,024)	(18,107)
Held-to-maturity securities, Estimated fair value	[2]	4,122,907	3,710,478
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		5,237	5,022
Available for sale securities, unrealized gains	[1]	13
Available-for-sale Securities, Gross unrealized losses	[1]	(35)	(39)
Available-for-sale securities		5,215	4,983
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		72,487	74,691
Available-for-sale Securities, Gross unrealized losses	[1]	(4,261)	(4,132)
Available-for-sale securities		68,226	70,559
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		234,292	308,409
Available for sale securities, unrealized gains	[1]	88	102
Available-for-sale Securities, Gross unrealized losses	[1]	(3,972)	(2,981)
Available-for-sale securities		230,408	305,530
Held-to-maturity Securities, Amortized cost	[2]	1,198,442	1,334,833
Held-to-maturity Securities, Gross unrealized gains	[2]	1,307	13,621
Held-to-maturity Securities, Gross unrealized losses	[2]	(31,689)	(16,208)
Held-to-maturity securities, Estimated fair value	[2]	1,168,060	1,332,246
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		74,411	75,548
Available for sale securities, unrealized gains	[1]	4	28
Available-for-sale Securities, Gross unrealized losses	[1]	(4,700)	(3,088)
Available-for-sale securities		69,715	72,488
Held-to-maturity Securities, Amortized cost	[2]	51,524	58,971
Held-to-maturity Securities, Gross unrealized gains	[2]	185	1,313
Held-to-maturity securities, Estimated fair value	[2]	51,709	60,284
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		1,245	1,568
Available-for-sale Securities, Gross unrealized losses	[1]	(26)
Available-for-sale securities		1,219	1,568
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		958,406	1,213,262
Available for sale securities, unrealized gains	[1]		3,832
Available-for-sale Securities, Gross unrealized losses	[1]	(26,802)	(5,652)
Available-for-sale securities		931,604	1,211,442
Held-to-maturity Securities, Amortized cost	[2]		40,011
Held-to-maturity Securities, Gross unrealized gains	[2]		27
Held-to-maturity Securities, Gross unrealized losses	[2]		(37)
Held-to-maturity securities, Estimated fair value	[2]		40,001
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		1,779,496	2,098,958
Available for sale securities, unrealized gains	[1]	672	12,877
Available-for-sale Securities, Gross unrealized losses	[1]	(16,108)	(4,897)
Available-for-sale securities		1,764,060	2,106,938
Held-to-maturity Securities, Amortized cost	[2]	2,968,888	2,264,283
Held-to-maturity Securities, Gross unrealized gains	[2]	4,585	15,526
Held-to-maturity Securities, Gross unrealized losses	[2]	(70,335)	(1,862)
Held-to-maturity securities, Estimated fair value	[2]	$ 2,903,138	$ 2,277,947
[1]	Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_4

Available-For-Sale And Held-To-Maturity Securities (Narrative) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Proceeds from sale of available-for-sale securities		$ 372,400	$ 87,300	$ 0
Net realized gains (loss) resulting from sale of available-for-sale securities		(3,900)	400
Unrealized gains (losses) recorded in accumulated other comprehensive loss	[1],[2],[3]	(36,254)	4,730	5,803
Financial instruments pledged as collateral		$ 1,900,000	2,200,000
Number of available for sale securities whose amortized costs exceeded their fair values | security		258
Available-for-sale Securities, Continuous		$ 55,904
Available-for-sale Securities, Continuous Unrealized		33,930
Available-for-sale Securities, Continuous		$ 2,626,686
Percentage of available-for-sale portfolio		85.50%
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security		196
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss		$ 102,024
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		30,205
Credit-related OTTI		0	0	$ 0
Gross unrealized losses related to investment portfolio		157,900
Pledged [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Trading securities pledged		$ 1,600,000	$ 2,000,000
[1]	Amounts are net of reclassifications to earnings of realized losses of $2.9 and realized gains of $0.2 million for the years ended December 31, 2018 and 2017, respectively. There were no reclassifications to earnings of realized gains for the year ended December 31, 2016.
[2]	Net of a tax benefit of $11.2 million and tax expenses of $3.3 million and $0.3 million for the years ended December 31, 2018, 2017, and 2016, respectively.
[3]	The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio risk. The reclassification is reflected in the activity for the year ended December 31, 2018. See Note 2 for further details.

Available-For-Sale And Held-T_5

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of Debt Securities By Contractual Maturity) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, Amortized Cost		$ 3,125,574
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	5,855
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	458,442
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,980,827
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,070,447
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		536,717
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		3,630,613
Held-to-maturity Securities, Amortized cost	[2]	4,218,854	$ 3,698,098
Held-to-maturity Securities, debt maturities, Fair Value	[2]	4,122,907	$ 3,710,478
Excluding Mortgage Backed Securities [Member]
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, within one year, Amortized Cost		5,872
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost		233,969
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost		406,184
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost		463,765
Availably-for-sale Securities, debt maturities, after ten years, Amortized Cost		1,705,836
Available-for-sale Securities, debt maturities, within one year, Fair Value		5,855
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value		227,818
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value		396,046
Available-for-sale Securities, debt maturities, after five through ten years, fair value		452,622
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		1,686,764
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		366,667
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,602,221
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value		364,758
Held-to-maturity Securities, debt maturities, after ten years, Fair Value		2,538,380
Mortgage Backed Securities [Member]
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost		132
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost		1,323
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost		5,801
Availably-for-sale Securities, debt maturities, after ten years, Amortized Cost		302,692
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value		133
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value		1,326
Available-for-sale Securities, debt maturities, after five through ten years, fair value		5,820
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		294,063
Held-to-maturity Securities, debt maturities, after one year through three years, Amortized Cost		51,524
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		170,050
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,028,392
Held-to-maturity Securities, debt maturities, after one year through three years, Fair Value		51,709
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value		165,858
Held-to-maturity Securities, debt maturities, after ten years, Fair Value		$ 1,002,202
[1]	Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_6

Available-For-Sale And Held-To-Maturity Securities (Contractual Maturities) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	$ 5,855
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	625,323
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	458,442
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,980,827
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,070,447
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		51,524
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		536,717
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		3,630,613
Held-to-maturity Securities, Amortized cost	[2]	4,218,854	$ 3,698,098
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	1,534
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	3,681
Available-for-sale Securities, debt maturities, Fair Value	[1]	5,215
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	80
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	18,199
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	49,947
Available-for-sale Securities, debt maturities, Fair Value	[1]	68,226
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	4,241
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	620,182
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	307,181
Available-for-sale Securities, debt maturities, Fair Value	[1]	931,604
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	127,242
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,636,818
Available-for-sale Securities, debt maturities, Fair Value	[1]	1,764,060
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		366,667
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,602,221
Held-to-maturity Securities, Amortized cost		2,968,888
Mortgage Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after five through ten years, fair value		5,820
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		294,063
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		170,050
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,028,392
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	1,460
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	5,820
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	223,128
Available-for-sale Securities, debt maturities, Fair Value	[1]	230,408
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		170,050
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,028,392
Held-to-maturity Securities, Amortized cost	[2]	1,198,442	1,334,833
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	69,715
Available-for-sale Securities, debt maturities, Fair Value	[1]	69,715
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		51,524
Held-to-maturity Securities, Amortized cost	[2]	51,524	$ 58,971
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,219
Available-for-sale Securities, debt maturities, Fair Value	[1]	$ 1,219
[1]	Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.
[2]	Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

Available-For-Sale And Held-T_7

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Gross Unrealized Losses And The Estimated Fair Value By Length Of Time In A Loss Position) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	$ (21,974)
Available-for-sale Securities, Estimated fair value, Less than 12 months	1,721,361
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(33,930)
Available-for-sale Securities, Estimated fair value, 12 months or more	905,325
Available-for-sale Securities, Gross unrealized losses, Total	(55,904)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,626,686
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(71,819)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,890,127
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(30,205)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	757,661
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(102,024)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	3,647,788
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(35)
Available-for-sale Securities, Estimated fair value, Less than 12 months	3,752
Available-for-sale Securities, Gross unrealized losses, Total	(35)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	3,752
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(4,261)
Available-for-sale Securities, Estimated fair value, 12 months or more	68,146
Available-for-sale Securities, Gross unrealized losses, Total	(4,261)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	68,146
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(16,108)
Available-for-sale Securities, Estimated fair value, Less than 12 months	1,348,927
Available-for-sale Securities, Gross unrealized losses, Total	(16,108)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	1,348,927
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(68,308)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,579,117
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(2,027)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	42,712
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(70,335)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	2,621,829
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(186)
Available-for-sale Securities, Estimated fair value, Less than 12 months	16,124
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(3,786)
Available-for-sale Securities, Estimated fair value, 12 months or more	188,069
Available-for-sale Securities, Gross unrealized losses, Total	(3,972)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	204,193
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(3,511)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	311,010
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(28,178)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	714,949
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(31,689)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	1,025,959
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(4,700)
Available-for-sale Securities, Estimated fair value, 12 months or more	68,850
Available-for-sale Securities, Gross unrealized losses, Total	(4,700)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	68,850
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(26)
Available-for-sale Securities, Estimated fair value, Less than 12 months	1,214
Available-for-sale Securities, Gross unrealized losses, Total	(26)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	1,214
Mortgage Backed Securities [Member] | Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(5,619)
Available-for-sale Securities, Estimated fair value, Less than 12 months	351,344
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(21,183)
Available-for-sale Securities, Estimated fair value, 12 months or more	580,260
Available-for-sale Securities, Gross unrealized losses, Total	(26,802)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 931,604

Bank Loans (Schedule Of Balance

Bank Loans (Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 8,581,647	$ 7,014,421
Unamortized loan premium/(discount), net	(12,155)	788
Loans in process	27,984	(856)
Unamortized loan fees, net	5,972	872
Allowance for loan losses	(85,833)	(67,466)	$ (45,163)
Bank loans, net	$ 8,517,615	$ 6,947,759
Gross bank loans, Percent	100.00%	100.00%
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 3,304,234	$ 2,437,938
Allowance for loan losses	$ (68,367)	$ (54,474)	(35,127)
Gross bank loans, Percent	38.50%	34.80%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 2,875,014	$ 2,593,576
Allowance for loan losses	$ (11,228)	$ (8,430)	(2,660)
Gross bank loans, Percent	33.50%	37.00%
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 1,786,966	$ 1,819,206
Allowance for loan losses	$ (1,978)	$ (2,088)	(3,094)
Gross bank loans, Percent	20.80%	25.90%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 318,961	$ 116,258
Allowance for loan losses	$ (1,778)	$ (1,520)	(1,363)
Gross bank loans, Percent	3.70%	1.70%
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 138,245	$ 7,896
Allowance for loan losses	$ (1,241)	$ (100)	(232)
Gross bank loans, Percent	1.60%	0.10%
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 38,098	$ 15,039
Allowance for loan losses	$ (310)	$ (162)	(371)
Gross bank loans, Percent	0.40%	0.20%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 120,129	$ 24,508
Allowance for loan losses	$ (88)	$ (16)	$ (129)
Gross bank loans, Percent	1.50%	0.30%

Bank Loans (Narrative) (Details

Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at lower of cost or market	$ 205,557	$ 226,068
Gains (losses) recognized from sale of loans	8,200	12,300	$ 16,000
Impaired loans more than 90 days past due	24,400	29,200
Troubled debt restructurings	9,100	9,100
Specific allowance	$ 8,703	$ 9,105
Collateralized loan portfolio	98.40%	97.20%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	$ 2,700,000	$ 2,700,000
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans pledged as collateral	2,400,000	2,400,000
Stifel Financial Corp. [Member] | Executive Officers Directors and Their Affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	24,800	8,400
Stifel Bancorp [Member] | Executive Officers Directors and Their Affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 4,000	$ 4,000

Bank Loans (Activity In The All

Bank Loans (Activity In The Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 67,466	$ 45,163
Provision	18,366	25,320
Charge-offs	(14)	(3,058)
Recoveries	15	41
Ending Balance	85,833	67,466
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	54,474	35,127
Provision	13,896	19,666
Charge-offs	(12)	(355)
Recoveries	9	36
Ending Balance	68,367	54,474
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	8,430	2,660
Provision	2,798	5,770
Ending Balance	11,228	8,430
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	2,088	3,094
Provision	(110)	(1,006)
Ending Balance	1,978	2,088
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,520	1,363
Provision	258	2,860
Charge-offs		(2,703)
Ending Balance	1,778	1,520
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	100	232
Provision	1,141	(132)
Ending Balance	1,241	100
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	162	371
Provision	145	(212)
Recoveries	3	3
Ending Balance	310	162
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	16	129
Provision	71	(115)
Charge-offs	(2)
Recoveries	3	2
Ending Balance	88	16
Qualitative [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	676	2,187
Provision	167	(1,511)
Ending Balance	$ 843	$ 676

Bank Loans (Unpaid Principal Ba

Bank Loans (Unpaid Principal Balances Of Loans and Amount Of Allowance Allocated Based Upon Impairment Method by Portfolio Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 8,703	$ 9,105
Allowance for Loan Losses, Collectively Evaluated for Impairment	77,130	58,361
Allowance for Loan Losses, Total	85,833	67,466	$ 45,163
Recorded Investment in Loans, Individually Evaluated for Impairment	24,401	29,213
Recorded Investment in Loans, Collectively Evaluated for Impairment	8,557,246	6,985,208
Recorded Investment in Loans, Total	8,581,647	7,014,421
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	24	24
Allowance for Loan Losses, Collectively Evaluated for Impairment	11,204	8,406
Allowance for Loan Losses, Total	11,228	8,430	2,660
Recorded Investment in Loans, Individually Evaluated for Impairment	519	171
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,874,495	2,593,405
Recorded Investment in Loans, Total	2,875,014	2,593,576
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	8,678	9,059
Allowance for Loan Losses, Collectively Evaluated for Impairment	59,689	45,415
Allowance for Loan Losses, Total	68,367	54,474	35,127
Recorded Investment in Loans, Individually Evaluated for Impairment	23,677	28,856
Recorded Investment in Loans, Collectively Evaluated for Impairment	3,280,557	2,409,082
Recorded Investment in Loans, Total	3,304,234	2,437,938
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,978	2,088
Allowance for Loan Losses, Total	1,978	2,088	3,094
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,786,966	1,819,206
Recorded Investment in Loans, Total	1,786,966	1,819,206
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,778	1,520
Allowance for Loan Losses, Total	1,778	1,520	1,363
Recorded Investment in Loans, Collectively Evaluated for Impairment	318,961	116,258
Recorded Investment in Loans, Total	318,961	116,258
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment		20
Allowance for Loan Losses, Collectively Evaluated for Impairment	310	142
Allowance for Loan Losses, Total	310	162	371
Recorded Investment in Loans, Individually Evaluated for Impairment	184	184
Recorded Investment in Loans, Collectively Evaluated for Impairment	37,914	14,855
Recorded Investment in Loans, Total	38,098	15,039
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,241	100
Allowance for Loan Losses, Total	1,241	100	232
Recorded Investment in Loans, Collectively Evaluated for Impairment	138,245	7,896
Recorded Investment in Loans, Total	138,245	7,896
Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	1	2
Allowance for Loan Losses, Collectively Evaluated for Impairment	87	14
Allowance for Loan Losses, Total	88	16	129
Recorded Investment in Loans, Individually Evaluated for Impairment	21	2
Recorded Investment in Loans, Collectively Evaluated for Impairment	120,108	24,506
Recorded Investment in Loans, Total	120,129	24,508
Qualitative [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	843	676
Allowance for Loan Losses, Total	$ 843	$ 676	$ 2,187

Bank Loans (Loans That Were Ind

Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 25,099	$ 29,888
Recorded Investment with No Allowance	789	5,211
Recorded Investment with Allowance	23,612	24,002
Total Recorded Investment	24,401	29,213
Related Allowance	8,703	9,105
Average Recorded Investment	24,336	30,756
Commercial And Industrial [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	23,677	28,856
Recorded Investment with No Allowance	242	5,211
Recorded Investment with Allowance	23,435	23,645
Total Recorded Investment	23,677	28,856
Related Allowance	8,678	9,059
Average Recorded Investment	23,807	30,277
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	184	184
Recorded Investment with No Allowance	184
Recorded Investment with Allowance		184
Total Recorded Investment	184	184
Related Allowance		20
Average Recorded Investment	184	300
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	544	171
Recorded Investment with No Allowance	352
Recorded Investment with Allowance	167	171
Total Recorded Investment	519	171
Related Allowance	24	24
Average Recorded Investment	275	174
Other [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	694	677
Recorded Investment with No Allowance	11
Recorded Investment with Allowance	10	2
Total Recorded Investment	21	2
Related Allowance	1	2
Average Recorded Investment	$ 70	$ 5

Bank Loans (Aging Of The Record

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($)		Dec. 31, 2018		Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 22,170,000		$ 19,961,000
Current Balance		8,559,477,000		6,994,460,000
Recorded Investment in Loans, Total		8,581,647,000		7,014,421,000
Non-accrual		15,298,000	[1]	20,090,000	[2]
Restructured		9,103,000	[1]	9,123,000	[2]
Total		24,401,000	[1]	29,213,000	[2]
Loans past due 90 days and still accruing interest		0		0
30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		7,003,000		19,961,000
90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		15,167,000
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		7,347,000		7,892,000
Current Balance		2,867,667,000		2,585,684,000
Recorded Investment in Loans, Total		2,875,014,000		2,593,576,000
Non-accrual	[1]	352,000
Restructured		167,000	[1]	171,000	[2]
Total		519,000	[1]	171,000	[2]
Residential Real Estate [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6,970,000		7,892,000
Residential Real Estate [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		377,000
Commercial And Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		14,656,000		11,883,000
Current Balance		3,289,578,000		2,426,055,000
Recorded Investment in Loans, Total		3,304,234,000		2,437,938,000
Non-accrual		14,741,000	[1]	19,904,000	[2]
Restructured		8,936,000	[1]	8,952,000	[2]
Total		23,677,000	[1]	28,856,000	[2]
Commercial And Industrial [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				11,883,000
Commercial And Industrial [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		14,656,000
Securities-Based Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		1,786,966,000		1,819,206,000
Recorded Investment in Loans, Total		1,786,966,000		1,819,206,000
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		318,961,000		116,258,000
Recorded Investment in Loans, Total		318,961,000		116,258,000
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		33,000		184,000
Current Balance		38,065,000		14,855,000
Recorded Investment in Loans, Total		38,098,000		15,039,000
Non-accrual		184,000	[1]	184,000	[2]
Total		184,000	[1]	184,000	[2]
Home Equity Lines Of Credit [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		33,000		184,000
Construction And Land [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		138,245,000		7,896,000
Recorded Investment in Loans, Total		138,245,000		7,896,000
Other [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		134,000		2,000
Current Balance		119,995,000		24,506,000
Recorded Investment in Loans, Total		120,129,000		24,508,000
Non-accrual		21,000	[1]	2,000	[2]
Total		21,000	[1]	2,000	[2]
Other [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				$ 2,000
Other [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 134,000
[1]	There were no loans past due 90 days and still accruing interest at December 31, 2018.
[2]	There were no loans past due 90 days and still accruing interest at December 31, 2017.

Bank Loans (Risk Category Of Lo

Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 8,581,647	$ 7,014,421
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	8,531,191	6,960,969
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	34,991	22,752
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	15,444	30,700
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	21
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,875,014	2,593,576
Residential Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,874,495	2,593,096
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio		309
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	519	171
Commercial And Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,304,234	2,437,938
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	3,254,698	2,385,152
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	34,795	22,443
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	14,741	30,343
Securities-Based Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,786,966	1,819,206
Securities-Based Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,786,966	1,819,206
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	318,961	116,258
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	318,961	116,258
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	38,098	15,039
Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	37,914	14,855
Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	184	184
Construction And Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	138,245	7,896
Construction And Land [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	138,245	7,896
Other [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	120,129	24,508
Other [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	119,912	24,506
Other [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	196
Other [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio		$ 2
Other [Member] | Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 21

Fixed Assets (Summary Of Fixed

Fixed Assets (Summary Of Fixed Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Furniture and equipment	$ 251,542	$ 225,553
Aircraft operating leases	214,065
Building and leasehold improvements	180,743	168,684
Fixed assets, gross	646,350	394,237
Less accumulated depreciation and amortization	(273,411)	(239,117)
Fixed assets, net	$ 372,939	$ 155,120

Fixed Assets (Narrative) (Detai

Fixed Assets (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)Air_craft	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Property Plant And Equipment [Abstract]
Depreciation and amortization	$ 27,896	$ 32,495	$ 43,147
Number of Aircraft engines | Air_craft	23
Aircraft engines with a net book value	$ 211,100

Fixed Assets (Summary Of Minimu

Fixed Assets (Summary Of Minimum Future Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leased Assets [Line Items]
2,019	$ 89,887
2,020	81,899
2,021	66,887
2,022	59,353
2,023	50,916
Thereafter	107,678
Operating leases future minimum payments	456,620
Aircraft [Member]
Operating Leased Assets [Line Items]
2,019	19,417
2,020	15,813
2,021	12,877
2,022	6,614
2,023	3,040
Thereafter	4,565
Operating leases future minimum payments	$ 62,326

Goodwill And Intangible Asset_2

Goodwill And Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	$ 968,834
Goodwill, Net Additions	65,845
Goodwill, Ending balance	1,034,679	$ 968,834
Intangible assets, Beginning balance	109,627
Intangible assets, Net Additions	22,585
Intangible assets, Amortization	(12,557)	(12,135)	$ (14,427)
Intangible assets, Ending balance	119,655	109,627
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	276,477
Goodwill, Net Additions	63,918
Goodwill, Ending balance	340,395	276,477
Intangible assets, Beginning balance	44,525
Intangible assets, Net Additions	21,780
Intangible assets, Amortization	(5,773)
Intangible assets, Ending balance	60,532	44,525
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance	692,357
Goodwill, Net Additions	1,927
Goodwill, Ending balance	694,284	692,357
Intangible assets, Beginning balance	65,102
Intangible assets, Net Additions	805
Intangible assets, Amortization	(6,784)
Intangible assets, Ending balance	$ 59,123	$ 65,102

Goodwill And Intangible Asset_3

Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2018	Aug. 31, 2018	Mar. 19, 2018
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill	$ 1,034,679	$ 968,834
Amortization of intangible assets	12,557	12,135	$ 14,427
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill	340,395	$ 276,477
Amortization of intangible assets	$ 5,773
Core Deposits [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	4 years 10 months 24 days
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	10 years 6 months
Trade Name [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	9 years 7 months 6 days
Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets	8 years 9 months 18 days
Ziegler [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill						$ 19,000
Ziegler [Member] | Customer Relationships and Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Identifiable intangible assets						$ 9,500
Business Bancshares, Inc. [Member] | Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill					$ 38,400
Business Bancshares, Inc. [Member] | Core Deposits [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Identifiable intangible assets					$ 8,600
Rand & Associates [Member] | Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill				$ 8,300
Rand & Associates [Member] | Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Identifiable intangible assets				$ 4,600

Goodwill And Intangible Asset_4

Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 198,107	$ 175,716
Accumulated Amortization	80,570	68,207
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	160,745	146,986
Accumulated Amortization	65,254	55,809
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24,713	24,713
Accumulated Amortization	11,755	10,228
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,615
Accumulated Amortization	816
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,431	1,419
Accumulated Amortization	1,293	968
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2,603	2,598
Accumulated Amortization	$ 1,452	$ 1,202

Goodwill And Intangible Asset_5

Goodwill And Intangible Assets (Amortization Expense In Future Periods) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2,019	$ 13,737
2,020	13,164
2,021	12,310
2,022	11,494
2,023	10,673
Thereafter	56,159
Future amortization expense total	$ 117,537

Borrowings and Federal Home L_2

Borrowings and Federal Home Loan Bank Advances (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)item
Short-term Debt [Line Items]
Uncommitted secured lines of credit	$ 1,000,000,000
Number of banks | item	6
Daily borrowings under our uncommitted secured lines	$ 391,000,000
Compensating balances	0
Federal home loan advances, floating-rate	$ 540,000,000
Stifel Bancorp [Member]
Short-term Debt [Line Items]
Notes maturity year	2,043
Notes payable	$ 124,500,000
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	$ 200,000,000
Credit facility expiration date	2020-03
LIBOR rate	2.00%
Outstanding credit facility	$ 0
Stifel Credit Facility [Member]
Short-term Debt [Line Items]
Committed revolving credit facility with bank and broker dealer - subsidiary	$ 250,000,000
Credit facility expiration date	2019-06
Outstanding credit facility	$ 0
Credit agreement maturity days	364 days
Company Owned Securities [Member]
Short-term Debt [Line Items]
Uncommitted secured lines of credit	$ 56,000,000
Trading securities pledged	$ 63,000,000
Federal Home Loan Bank advances [Member]
Short-term Debt [Line Items]
Weighted average interest rate on borrowings	1.61%

Senior Notes (Summary of Senior

Senior Notes (Summary of Senior Notes) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, gross		$ 1,025,000	$ 1,025,000
Debt issuance costs, net		(9,027)	(10,060)
Senior notes, net		1,015,973	1,014,940
Senior notes 4.250% due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[1]	500,000	500,000
Senior notes, net						$ 300,000
Senior notes 3.50% due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[2]	300,000	300,000
Senior notes, net					$ 300,000
Senior notes 5.20% due 2047 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[3]	$ 225,000	$ 225,000
Senior notes, net				$ 200,000
[1]	In July 2014, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 4.250% senior notes due July 2024. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption. In July 2016, we issued an additional $200.0 million in aggregate principal amount of 4.25% senior notes due 2024.
[2]	In December 2015, we sold in a registered underwritten public offering, $300.0 million in aggregate principal amount of 3.50% senior notes due December 2020. Interest on these senior notes is payable semi-annually in arrears. We may redeem the notes in whole or in part, at our option, at a redemption price equal to 100% of their principal amount, plus a “make-whole” premium and accrued and unpaid interest, if any, to the date of redemption.
[3]	In October 2017, we completed the pricing of a registered underwritten public offering of $200.0 million in aggregate principal amount of 5.20% senior notes due October 2047. Interest on the senior notes is payable quarterly in arrears on January 15, April 15, July 15, and October 15. On or after October 15, 2022, we may redeem some or all of the senior notes at any time at a redemption price equal to 100% of the principal amount of the notes being redeemed plus accrued interest thereon to the redemption date. On October 27, 2017, we completed the sale of an additional $25.0 million aggregate principal amount of Notes pursuant to the over-allotment option.

Senior Notes (Summary of Seni_2

Senior Notes (Summary of Senior Notes) (Parenthetical) (Details) - USD ($) $ in Thousands	Oct. 27, 2017	Jul. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Senior notes			$ 1,015,973	$ 1,014,940
Senior notes 4.250% due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate			4.25%				4.25%
Senior notes							$ 300,000
Debt instrument, maturity date			Jul. 31, 2024
Redemption price, percentage of principal amount			100.00%
Additional issuance of long-term debt		$ 200,000
Senior notes 3.50% due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate			3.50%			3.50%
Senior notes						$ 300,000
Debt instrument, maturity date			Dec. 31, 2020
Redemption price, percentage of principal amount			100.00%
Senior notes 5.20% due 2047 [Member]
Debt Instrument [Line Items]
Stated interest rate			5.20%		5.20%
Senior notes					$ 200,000
Debt instrument, maturity date			Oct. 31, 2047
Redemption price, percentage of principal amount			100.00%
Additional issuance of long-term debt	$ 25,000

Senior Notes (Schedule Of Corpo

Senior Notes (Schedule Of Corporate Debt Principal Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Senior notes, net	$ 1,015,973	$ 1,014,940
Non Recourse Debt [Member]
Debt Instrument [Line Items]
2,020	300,000
Thereafter	725,000
Senior notes, net	$ 1,025,000

Bank Deposits (Schedule Of Depo

Bank Deposits (Schedule Of Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Money market and savings accounts	$ 13,609,612	$ 13,219,675
Certificates of deposit	1,763,336	1,575
Demand deposits (interest-bearing)	392,765	184,829
Demand deposits (non-interest-bearing)	97,900	5,856
Bank deposits	$ 15,863,613	$ 13,411,935

Bank Deposits (Narrative) (Deta

Bank Deposits (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Bank Deposits [Line Items]
Weighted average interest rate on deposits	0.60%	0.10%
Brokerage Customers Deposits [Member]
Bank Deposits [Line Items]
Deposits of related parties	$ 15,200	$ 13,400
Stifel Nicolaus [Member]
Bank Deposits [Line Items]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 6.5	$ 0.2

Bank Deposits (Scheduled Maturi

Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 27,440	$ 438
One to three years	38,550	148
Three to five years	15,511
Certificates of deposit, less than $100,000	81,501	586
Within one year	1,513,202	651
One to three years	157,232	338
Three to five years	11,401
Certificates of deposit, $100,000 and greater	1,681,835	989
Total certificates of deposit	$ 1,763,336	$ 1,575

Derivative Instruments And He_3

Derivative Instruments And Hedging Activities (Schedule Of Notional Values And Fair Values Of Derivative Instruments) (Details) - Cash Flow Interest Rate Contracts [Member] - Designated As Hedging Instrument [Member] - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Value	$ 540,000,000	$ 540,000,000
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 7,683,000	$ 7,995,000

Derivative Instruments And He_4

Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Average remaining life of interest rate swap agreements	1 year 1 month 6 days
Estimated derivatives to be reclassified as increase to interest expense	$ 3.9

Derivative Instruments And He_5

Derivative Instruments And Hedging Activities (Schedule Of Derivative Instruments In Consolidated Statements Of Operations) (Details) - Cash Flow Interest Rate Contracts [Member] - Interest Expense [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI (Effectiveness)	$ (3,876)	$ 1,085	$ 6,383
Gain/(Loss) Reclassified From OCI Into Income	$ 4,947	$ (635)	(5,444)
Loss Recognized Due to Ineffectiveness			$ 30

Debentures To Stifel Financia_3

Debentures To Stifel Financial Capital Trusts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2016	Dec. 31, 2017		Jun. 28, 2008	Mar. 30, 2007	Aug. 12, 2005
Debt Instrument [Line Items]
Debenture to Stifel Financial Capital Trust	$ 60,000			$ 67,500
Stifel Financial Capital Trust II [Member]
Debt Instrument [Line Items]
Debenture to Stifel Financial Capital Trust	$ 20,000	[1]		20,000	[1]			$ 35,000
Stated interest rate	6.38%
Maturity date	Sep. 30, 2035
Earliest call date	Sep. 30, 2010
Interest rate terms, spread over reference rate	1.70%
Reference rate	Three-month LIBOR plus 1.70% per annum
Extinguishment of debentures			$ 15,000
Stifel Financial Capital Trust III [Member]
Debt Instrument [Line Items]
Debenture to Stifel Financial Capital Trust	$ 35,000	[2]		35,000	[2]		$ 35,000
Stated interest rate	6.79%
Maturity date	Jun. 6, 2037
Earliest call date	Jun. 6, 2012
Interest rate terms, spread over reference rate	1.85%
Reference rate	Three-month LIBOR plus 1.85% per annum
Stifel Financial Capital Trust IV [Member]
Debt Instrument [Line Items]
Debenture to Stifel Financial Capital Trust	$ 5,000	[3]		$ 12,500	[3]	$ 35,000
Stated interest rate	6.78%
Maturity date	Sep. 6, 2037
Earliest call date	Sep. 6, 2012
Interest rate terms, spread over reference rate	1.85%
Reference rate	Three-month LIBOR plus 1.85% per annum
[1]	On August 12, 2005, we completed a private placement of $35.0 million of 6.38% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust II (the “Trust II”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 30, 2035, but may be redeemed by our company, and in turn, the Trust II would call the debenture beginning September 30, 2010. The Trust II requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.70% per annum. During 2016, we extinguished $15.0 million of the Trust II debentures.
[2]	On March 30, 2007, we completed a private placement of $35.0 million of 6.79% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust III (the “Trust III”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on June 6, 2037, but may be redeemed by our company, and in turn, Trust III would call the debenture beginning June 6, 2012. Trust III requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum.
[3]	On June 28, 2007, we completed a private placement of $35.0 million of 6.78% Cumulative Trust Preferred Securities. The trust preferred securities were offered by Stifel Financial Capital Trust IV (the “Trust IV”), a non-consolidated wholly owned subsidiary of our company. The trust preferred securities mature on September 6, 2037, but may be redeemed by our company, and in turn, Trust IV would call the debenture beginning September 6, 2012. Trust IV requires quarterly distributions of interest to the holders of the trust preferred securities. Distributions are payable at a floating interest rate equal to three-month LIBOR plus 1.85% per annum.

Disclosures About Offsetting _3

Disclosures About Offsetting Assets And Liabilities (Financial Assets And Derivative Assets That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Offsetting [Abstract]
Gross amounts of recognized assets, Securities borrowing	[1]	$ 109,795	$ 132,776
Net amounts presented in the Statement of Financial Condition, Securities borrowing	[1]	109,795	132,776
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities borrowing	[1]	(57,328)	(78,474)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities borrowing	[1]	(45,005)	(37,248)
Securities borrowed, Net amount	[1]	7,462	17,054
Gross amounts of recognized assets, Reverse repurchase agreements	[2]	699,900	512,220
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	699,900	512,220
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	(365,822)	(233,624)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities purchased under agreements to resell	[2]	(329,740)	(266,008)
Securities purchased under agreements to resell, Net amount	[2]	4,338	12,588
Gross amounts of recognized assets, Cash flow interest rate contracts		7,683	7,995
Net amounts presented in the Statement of Financial Condition, Cash flow interest rate contracts		7,683	7,995
Cash flow interest rate contracts, Net amount		7,683	7,995
Gross amounts of recognized assets		817,378	652,991
Net amounts presented in the Statements of Financial Condition		817,378	652,991
Gross amounts not offset in the Statement of Financial Position		(423,150)	(312,098)
Gross amounts not offset in the Statement of Financial Position, Collateral received		(374,745)	(303,256)
Net amount		$ 19,483	$ 37,637
[1]	Securities borrowing transactions are included in receivables from brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 4 in the notes to consolidated financial statements for additional information on receivables from brokers, dealers, and clearing organizations.
[2]	Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively.

Disclosures About Offsetting _4

Disclosures About Offsetting Assets And Liabilities (Financial Assets And Derivative Assets That Are Subject To Offset) (Details) (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral	[1]	$ 329,740	$ 266,008
Fair Value Of Securities Pledged As Collateral [Member]
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral		$ 695,600	$ 509,400
[1]	Collateral received includes securities received by our company from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities pledged as collateral was $695.6 million and $509.4 million at December 31, 2018 and 2017, respectively.

Disclosures About Offsetting _5

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities And Derivative Liabilities That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Offsetting [Abstract]
Gross amounts of recognized liabilities, Securities lending	[1]	$ (392,163)	$ (219,782)
Net amounts presented in the Statement of Financial Condition, Securities lending	[1]	(392,163)	(219,782)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending	[1]	57,328	78,474
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending	[1]	325,110	133,772
Securities lending, Net amount	[1]	(9,725)	(7,536)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell	[2]	(535,394)	(233,704)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	(535,394)	(233,704)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	365,822	233,624
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell	[2]	169,572	80
Gross amounts of recognized liabilities		(927,557)	(453,486)
Net amounts presented in the Statement of Financial Condition		(927,557)	(453,486)
Gross amounts not offset in the Statement of Financial Position, Financial instruments		423,150	312,098
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged		494,682	133,852
Net amount		$ (9,725)	$ (7,536)
[1]	Securities lending transactions are included in payables to brokers, dealers, and clearing organizations on the consolidated statements of financial condition. See Note 4 in the notes to consolidated financial statements for additional information on payables to brokers, dealers, and clearing organizations.
[2]	Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Disclosures About Offsetting _6

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities And Derivative Liabilities That Are Subject To Offset) (Details) (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party	[1]	$ 169,572	$ 80
U.S. Government Agency Securities And U.S. Government Securities And Corporate Fixed Income Securities [Member] | Fair Value Of Securities Pledged As Collateral [Member]
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party		$ 558,600	$ 241,400
[1]	Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $558.6 million and $241.4 million at December 31, 2018 and 2017, respectively.

Commitments, Guarantees, And _2

Commitments, Guarantees, And Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Outstanding committed capital to certain entities	$ 2.5
Rent expense	$ 104.6	$ 104.5	$ 108.7

Commitments, Guarantees, And _3

Commitments, Guarantees, And Contingencies (Future Minimum Commitments Under Non-Cancelable Operating Leases) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,019	$ 89,887
2,020	81,899
2,021	66,887
2,022	59,353
2,023	50,916
Thereafter	107,678
Operating leases future minimum payments	$ 456,620

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Narrative) (Details) $ in Millions	Dec. 31, 2018USD ($)
Our Other Broker-Dealer Subsidiaries
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Ratio of indebtedness to net capital	15
Stifel Nicolaus [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Aggregate debit balances	20.90%
Net capital	$ 342.7
Excess of minimum required net capital	310
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Net capital under the alternative method	$ 1
Aggregate debit balances	2.00%

Regulatory Capital Requiremen_4

Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 2,103,339
Tier 1 capital, Actual Ratio	18.20%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 694,291
Tier 1 capital For Capital Adequacy Purposes, Ratio	6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 925,721
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%
Total capital, Actual Amount	$ 2,247,937
Total capital, Actual Ratio	19.40%
Total capital For Capital Adequacy Purposes, Amount	$ 925,721
Total capital For Capital Adequacy Purposes, Ratio	8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,157,152
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 2,103,339
Tier 1 leverage, Actual Ratio	9.30%
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 904,735
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 1,130,919
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
Stifel Financial Corp. [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,939,938
Tier 1 capital, Actual Ratio	16.80%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 520,718
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 752,148
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%
Stifel Bank & Trust [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,176,915
Tier 1 capital, Actual Ratio	14.60%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 485,274
Tier 1 capital For Capital Adequacy Purposes, Ratio	6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 647,032
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%
Total capital, Actual Amount	$ 1,262,361
Total capital, Actual Ratio	15.60%
Total capital For Capital Adequacy Purposes, Amount	$ 647,032
Total capital For Capital Adequacy Purposes, Ratio	8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 808,790
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 1,176,915
Tier 1 leverage, Actual Ratio	7.10%
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 658,602
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 823,252
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
Stifel Bank & Trust [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 1,163,514
Tier 1 capital, Actual Ratio	14.40%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 363,956
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 525,714
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%
Stifel Bank [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 77,244
Tier 1 capital, Actual Ratio	12.30%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 37,766
Tier 1 capital For Capital Adequacy Purposes, Ratio	6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 50,354
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%
Total capital, Actual Amount	$ 85,117
Total capital, Actual Ratio	13.50%
Total capital For Capital Adequacy Purposes, Amount	$ 50,354
Total capital For Capital Adequacy Purposes, Ratio	8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 62,943
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 77,244
Tier 1 leverage, Actual Ratio	9.90%
Tier 1 leverage For Capital Adequacy Purposes, Amount	$ 31,113
Tier 1 leverage For Capital Adequacy Purposes, Ratio	4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 38,892
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%
Stifel Bank [Member] | Common Stock [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 capital, Actual Amount	$ 77,244
Tier 1 capital, Actual Ratio	12.30%
Tier 1 capital For Capital Adequacy Purposes, Amount	$ 28,324
Tier 1 capital For Capital Adequacy Purposes, Ratio	4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 40,913
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%

Revenues from Contracts with _3

Revenues from Contracts with Customers (Schedule of Total Revenues Separated between Revenues from Contracts with Customers and Other Sources of Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Revenue from contracts with customers									$ 2,187,145
Other									15,568
Total revenue from contracts with customers									2,187,145
Other sources of revenue:
Interest	$ 184,534	$ 169,760	$ 154,421	$ 137,734	$ 126,615	$ 117,862	$ 108,951	$ 100,953	646,449	$ 454,381	$ 294,332
Principal transactions									351,378	396,826	475,428
Other									9,985
Total revenues	$ 851,325	$ 786,810	$ 780,011	$ 776,811	$ 823,950	$ 738,794	$ 742,291	$ 691,427	3,194,957	2,996,462	2,642,370
Commissions [Member]
Revenues:
Revenue from contracts with customers									657,732	678,904	729,989
Investment Banking [Member]
Revenues:
Revenue from contracts with customers									707,670	726,763	513,034
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers									$ 806,175	$ 702,064	$ 582,789

Revenues from Contracts with _4

Revenues from Contracts with Customers (Revenues from Contracts with Customers Disaggregated by Major Business Activity and Primary Geographic Regions) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation Of Revenue [Line Items]
Commissions	$ 657,732
Revenue from contracts with customers	2,187,145
Other	15,568
Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	336,188
Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	371,482
Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	806,175	$ 702,064	$ 582,789
Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Commissions	472,135
Revenue from contracts with customers	1,321,266
Other	11,625
Global Wealth Management [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	31,293
Global Wealth Management [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	81
Global Wealth Management [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	806,132
Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Commissions	185,597
Revenue from contracts with customers	861,936
Institutional Group [Member] | Capital Raising [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	304,895
Institutional Group [Member] | Advisory Fees [Member]
Disaggregation Of Revenue [Line Items]
Investment banking	371,401
Institutional Group [Member] | Asset Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	43
Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	3,943
Other	3,943
United States [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	2,050,460
United States [Member] | Global Wealth Management [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	1,321,266
United States [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	725,251
United States [Member] | Other Segments [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	3,943
Europe [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	130,979
Europe [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	130,979
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	5,706
Other [Member] | Institutional Group [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contracts with customers	$ 5,706

Revenues from Contracts with _5

Revenues from Contracts with Customers (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue From Contract With Customer [Abstract]
Receivables related to contract with customers	$ 116,700,000	$ 93,000,000
Impairment related to receivables	0
Deferred Revenue	$ 9,500,000

Interest Income And Interest _3

Interest Income And Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest Income Expense Net [Abstract]
Bank loans, net									$ 300,541	$ 206,084	$ 127,923
Investment securities									252,200	187,731	107,454
Margin balances									49,515	37,218	32,147
Financial instruments owned									21,407	17,563	18,965
Other									22,786	5,785	7,843
Total interest income									646,449	454,381	294,332
Bank deposits									82,256	12,661	7,331
Senior notes									44,610	35,338	36,217
Federal Home Loan Bank advances									15,173	8,305	6,777
Other									28,037	13,726	16,549
Total interest expense	$ 57,876	$ 48,468	$ 37,279	$ 26,453	$ 19,865	$ 17,625	$ 16,644	$ 15,896	$ 170,076	$ 70,030	$ 66,874

Employee Incentive, Deferred _3

Employee Incentive, Deferred Compensation, And Retirement Plans (Details) - USD ($) $ in Thousands

1 Months Ended

3 Months Ended

12 Months Ended

Dec. 31, 2017

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Shares authorized to grant

5,200,000

Stock-based compensation

$ 100,789

$ 140,461

$ 186,303

Tax benefit related to stock-based compensation

4,000

Provision for income tax expense (benefit)

$ 41,869

$ 36,672

$ 31,060

$ 30,793

$ 1,168

$ 41,603

$ 30,387

$ 13,507

$ 140,394

86,665

61,062

Restricted stock units, charges at the date of modification

55,900

Vesting of outstanding debenture awards

$ 51,400

Options granted during the period

0

Contributions to the Profit Sharing Plan

$ 12,800

7,100

6,500

Incentive Stock Award Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based compensation

$ 111,800

246,700

190,100

Incentive Stock Award Plans [Member] | ASU No. 2016-09 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Provision for income tax expense (benefit)

$ (64,700)

4,900

Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Restricted stock units, charges at the date of modification

$ 58,600

Restricted Stock Units and Restricted Stock Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Total number of stock awards outstanding

16,400,000

16,400,000

Unvested stock awards outstanding

13,938,000

14,117,000

13,938,000

14,117,000

13,938,000

Unrecognized compensation expense related to non-vested options

$ 297,400

$ 297,400

Weighted-average period, compensation cost expected to recognized, in years

2 years 9 months 18 days

Fair value of stock awards vested

$ 83,600

Performance-based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

5 years

Award performance period

4 years

Total number of stock awards outstanding

700,000

700,000

Unvested stock awards outstanding

700,000

700,000

SWAP Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Elective deferrals vested percentage

100.00%

100.00%

Percentage of earnings deferred into company stock units

5.00%

5.00%

Percentage of earnings deferred into company stock units, Company match

25.00%

25.00%

Percentage of earnings deferred into company stock units, Additional elective deferral

1.00%

Minimum [Member] | Deferred Compensation Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

1 year

Minimum [Member] | Incentive Stock Award Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

1 year

Minimum [Member] | Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

1 year

Minimum [Member] | Restricted Stock Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

1 year

Minimum [Member] | Performance-based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Potential percentage of converted shares

0.00%

Minimum [Member] | SWAP Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

1 year

Maximum [Member] | Deferred Compensation Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

8 years

Maximum [Member] | Incentive Stock Award Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

10 years

Maximum [Member] | Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

10 years

Maximum [Member] | Restricted Stock Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

5 years

Maximum [Member] | Performance-based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Potential percentage of converted shares

200.00%

Maximum [Member] | SWAP Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Awards vesting period in years

10 years

Employee Incentive, Deferred _4

Employee Incentive, Deferred Compensation, And Retirement Plans (Schedule Of Unvested Restricted Stock Award Roll Forward) (Details) - Restricted Stock Units and Restricted Stock Awards [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Beginning balance | shares	13,938
Granted | shares	2,496
Vested | shares	(2,030)
Cancelled | shares	(287)
Unvested, Ending balance | shares	14,117
Unvested, Weighted-average grant date fair value, Beginning balance | $ / shares	$ 44.31
Granted, Weighted-average grant date fair value | $ / shares	55.94
Vested | $ / shares	41.18
Cancelled, Weighted-average grant date fair value | $ / shares	47.98
Unvested, Weighted-average grant date fair value, Ending balance | $ / shares	$ 46.75

Off-Balance Sheet Credit Risk (

Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
General settlement period of securities transactions	2 days
Fair value of securities accepted as collateral permitted to sell or repledge	$ 2,400	$ 2,400
Fair value of collateral securities sold or repledged	535.4	233.7
Outstanding commitments to originate loans	146.7	160.2
Letters of credit outstanding	26.3	82.5
Unused Lines Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unused lines of credit to commercial and consumer borrowers	$ 919.5	$ 590.5
Standby Letters of Credit [Member] | Maximum [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Letters of credit, expiration period	1 year

Income Taxes (Provision For Inc

Income Taxes (Provision For Income Taxes/(Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Current taxes: Federal									$ 89,971	$ (29,396)	$ 7,927
Current taxes: State									36,070	(334)	5,818
Current taxes: Foreign									99	(1,734)	1,255
Current taxes: Total									126,140	(31,464)	15,000
Deferred taxes: Federal									11,932	114,842	39,127
Deferred taxes: State									2,267	1,728	6,261
Deferred taxes: Foreign									55	1,559	674
Deferred Income Tax Expense (Benefit), Total									14,254	118,129	46,062
Provision for income taxes	$ 41,869	$ 36,672	$ 31,060	$ 30,793	$ 1,168	$ 41,603	$ 30,387	$ 13,507	$ 140,394	$ 86,665	$ 61,062

Income Taxes (Reconciliation Of

Income Taxes (Reconciliation Of The Statutory Federal Income Tax With The Company's Effective Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Statutory rate									$ 112,215	$ 94,338	$ 49,904
State income taxes, net of federal income tax									30,762	6,721	7,688
Foreign tax rate difference									(318)	(412)	(1,810)
Change in uncertain tax position									(617)	1,544	41
Revaluation of deferred tax assets									(3,006)	42,443
Excess tax benefit from stock-based compensation									(3,700)	(57,431)
Non-deductible litigation expense											7,700
Other, net									5,058	(538)	(2,461)
Provision for income taxes	$ 41,869	$ 36,672	$ 31,060	$ 30,793	$ 1,168	$ 41,603	$ 30,387	$ 13,507	$ 140,394	$ 86,665	$ 61,062

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Deferred compensation	$ 74,916	$ 71,687
Receivable reserves	30,252	22,679
Net operating loss carryforwards	29,699	31,986
Accrued expenses	19,832	33,957
Unrealized loss on investments	10,635
Depreciation		4,012
Other	3,066
Total deferred tax assets	168,400	164,321
Valuation allowance	(3,944)	(4,285)
Deferred tax assets	164,456	160,036
Goodwill and other intangibles	(42,045)	(38,982)
Depreciation	(6,629)
Prepaid expenses	(3,774)	(2,834)
Unrealized gain on investments		(11,081)
Other		(1,987)
Total deferred tax liabilities	(52,448)	(54,884)
Net deferred tax asset	$ 112,008	$ 105,152

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax [Line Items]
Corporate tax rate	21.00%	35.00%
Additional tax benefit	$ 3,000
Net operating loss carryforward	308,100
Valuation allowance decrease	300
Deferred tax assets, net	112,008	$ 105,152
Unrecognized tax benefits	312	3,180	$ 1,800	$ 2,717
Unrecognized tax benefits, accrued interest and penalties	100	500
Accounts Payable and Accrued Expenses [Member]
Income Tax [Line Items]
Current taxes payable	8,400	4,200
Other Assets [Member]
Income Tax [Line Items]
Current taxes receivable	$ 0	$ 54,300

Income Taxes (Unrecognized Tax

Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Beginning balance	$ 3,180	$ 1,800	$ 2,717
Increase related to prior year tax positions	4	3,036	5
Decrease related to prior year tax positions	(33)	(287)	(31)
Increase related to current year tax positions	191
Decrease related to settlements with taxing authorities	(3,030)	(171)	(42)
Decrease related to lapsing of statute of limitations		(1,198)
Increase/(decrease) related to business acquisitions			(849)
Ending balance	$ 312	$ 3,180	$ 1,800

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018Segment
Segment Reporting Information [Line Items]
Number of reporting segments	3
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Number of operating segments	2

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Net revenues		$ 793,449	$ 738,342	$ 742,732	$ 750,358	$ 804,085	$ 721,169	$ 725,647	$ 675,531	$ 3,024,881	[1]	$ 2,926,432	[1]	$ 2,575,496	[1]
Income/(loss) before income taxes										534,362		269,536		142,582
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]									1,990,319		1,822,218		1,563,410
Income/(loss) before income taxes										737,003		626,906		430,318
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]									1,055,495		1,110,768		1,014,164
Income/(loss) before income taxes										157,051		217,981		164,143
Other Segments [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]									(20,933)		(6,554)		(2,078)
Income/(loss) before income taxes										$ (359,692)		$ (575,351)		$ (451,879)
[1]	No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2018, 2017, and 2016.

Segment Reporting (Schedule O_2

Segment Reporting (Schedule Of Operating Information, Segment) (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Net revenues accounted for by individual client, maximum percentage	10.00%	10.00%	10.00%

Segment Reporting (Schedule O_3

Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 24,519,598	$ 21,383,953
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	21,040,224	17,717,617
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	3,238,617	3,313,304
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 240,757	$ 353,032

Segment Reporting (Schedule O_4

Segment Reporting (Schedule Of Net Revenues Earned On Major Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Total net revenues	$ 793,449	$ 738,342	$ 742,732	$ 750,358	$ 804,085	$ 721,169	$ 725,647	$ 675,531	$ 3,024,881	[1]	$ 2,926,432	[1]	$ 2,575,496	[1]
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues									2,855,955		2,783,175		2,429,714
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues									156,557		129,288		132,622
Other [Member]
Segment Reporting Information [Line Items]
Total net revenues									$ 12,369		$ 13,969		$ 13,160
[1]	No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2018, 2017, and 2016.

Earnings Per Share (Computation

Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share ) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 114,062	$ 103,858	$ 87,287	$ 88,761	$ (1,988)	$ 66,536	$ 52,811	$ 65,512	$ 393,968	$ 182,871	$ 81,520
Preferred dividends	2,344	2,343	2,344	2,344	2,344	2,343	2,344	2,344	9,375	9,375	3,906
Net Income available to common shareholders	$ 111,718	$ 101,515	$ 84,943	$ 86,417	$ (4,332)	$ 64,193	$ 50,467	$ 63,168	$ 384,593	$ 173,496	$ 77,614
Average shares used in basic computation	71,666	71,919	71,692	71,999	68,782	68,522	68,556	68,386	71,786	68,562	66,871
Dilutive effect of stock options and units									9,535	12,473	10,692
Average shares used in diluted computation	80,706	81,484	81,299	81,789	68,782	80,881	80,021	80,695	81,321	81,035	77,563
Basic	$ 1.56	$ 1.41	$ 1.18	$ 1.20	$ (0.06)	$ 0.94	$ 0.74	$ 0.92	$ 5.36	$ 2.53	$ 1.16
Diluted	$ 1.38	$ 1.25	$ 1.04	$ 1.06	$ (0.06)	$ 0.79	$ 0.63	$ 0.78	$ 4.73	$ 2.14	$ 1

Earnings Per Share (Details)

Earnings Per Share (Details) - $ / shares	3 Months Ended						12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Cash dividend declared per common share	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.10	$ 0.10	$ 0.48	$ 0.20	$ 0
Cash dividend paid per common share							$ 0.48	$ 0.20	$ 0

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 31, 2018	Jan. 03, 2017	Jul. 11, 2016	Dec. 31, 2018	Dec. 31, 2017	Nov. 30, 2018	Dec. 31, 2016
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to repurchase				9,000,000		5,300,000
Share repurchase amount						$ 10
Purchase of treasury stock				$ 170.2	$ 13
Treasury Stock, Shares, Acquired				3,400,000	300,000
Treasury Stock Acquired, Average Cost Per Share				$ 49.59	$ 43.83
Common stock reissued				500,000	500,000
Preferred stock, par value				$ 1	$ 1		$ 1
Non-Cumulative Perpetual Preferred Stock, Series A [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Issuance of preferred stock			$ 150
Preferred stock, dividend rate percentage			6.25%
Preferred stock, par value			$ 1
Preferred stock liquidation preference per depositary share			25
Preferred stock, liquidation preference per share			$ 25,000
Business Bancshares, Inc. [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Stock issued for acquisition	2,000,000
City Securities [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Stock issued for acquisition		200,000

Variable Interest Entities (Det

Variable Interest Entities (Details) $ in Millions	Jul. 31, 2018Air_craft	Dec. 31, 2018USD ($)Air_craft
Variable Interest Entity [Line Items]
Assets in partnership		$ 231.8
Number of Aircraft engines | Air_craft		23
Jet Holding S.a.r.l. [Member]
Variable Interest Entity [Line Items]
Ownreship interest	100.00%
Weisel Capital Management LLC [Member]
Variable Interest Entity [Line Items]
Assets in partnership		$ 227
FAN Engine Securitization Ltd [Member]
Variable Interest Entity [Line Items]
Number of Aircraft engines | Air_craft	24
FAN Engine Securitization Ltd [Member] | Other Income [Member]
Variable Interest Entity [Line Items]
Gain recognized upon consolidation		$ 15.3
FAN Engine Securitization Ltd [Member] | Jet Holding S.a.r.l. [Member]
Variable Interest Entity [Line Items]
Ownreship interest	100.00%

Subsequent Events (Details)

Subsequent Events (Details)	12 Months Ended
	Dec. 31, 2018item
Subsequent Events [Abstract]
Number of types of subsequent events	2

Quarterly Financial Informati_3

Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Operating revenues	$ 666,791	$ 617,050	$ 625,590	$ 639,077	$ 697,335	$ 620,932	$ 633,340	$ 590,474
Interest income	184,534	169,760	154,421	137,734	126,615	117,862	108,951	100,953	$ 646,449		$ 454,381		$ 294,332
Total revenues	851,325	786,810	780,011	776,811	823,950	738,794	742,291	691,427	3,194,957		2,996,462		2,642,370
Interest expense	57,876	48,468	37,279	26,453	19,865	17,625	16,644	15,896	170,076		70,030		66,874
Net revenues	793,449	738,342	742,732	750,358	804,085	721,169	725,647	675,531	3,024,881	[1]	2,926,432	[1]	2,575,496	[1]
Total non-interest expenses	637,518	597,812	624,385	630,804	804,905	613,030	642,449	596,512	2,490,519		2,656,896		2,432,914
Income before income tax expense	155,931	140,530	118,347	119,554	(820)	108,139	83,198	79,019	534,362		269,536		142,582
Provision for income taxes	41,869	36,672	31,060	30,793	1,168	41,603	30,387	13,507	140,394		86,665		61,062
Net income	114,062	103,858	87,287	88,761	(1,988)	66,536	52,811	65,512	393,968		182,871		81,520
Preferred dividends	2,344	2,343	2,344	2,344	2,344	2,343	2,344	2,344	9,375		9,375		3,906
Net Income available to common shareholders	$ 111,718	$ 101,515	$ 84,943	$ 86,417	$ (4,332)	$ 64,193	$ 50,467	$ 63,168	$ 384,593		$ 173,496		$ 77,614
Earnings per common share
Basic	$ 1.56	$ 1.41	$ 1.18	$ 1.20	$ (0.06)	$ 0.94	$ 0.74	$ 0.92	$ 5.36		$ 2.53		$ 1.16
Diluted	$ 1.38	$ 1.25	$ 1.04	$ 1.06	$ (0.06)	$ 0.79	$ 0.63	$ 0.78	$ 4.73		$ 2.14		$ 1
Weighted-average number of common shares outstanding:
Basic	71,666	71,919	71,692	71,999	68,782	68,522	68,556	68,386	71,786		68,562		66,871
Diluted	80,706	81,484	81,299	81,789	68,782	80,881	80,021	80,695	81,321		81,035		77,563
Cash dividends declared per common share	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.10	$ 0.10			$ 0.48		$ 0.20		$ 0
[1]	No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2018, 2017, and 2016.