10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 ________________________________________

FORM 10-Q

________________________________________

(Mark One)*

ý Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

for the quarterly period ended March 31, 2018

or

¨ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

for the transition period from              to             

0-10200

(Commission File Number)

________________________________________ 

________________________________________

SEI INVESTMENTS COMPANY

(Exact name of registrant as specified in its charter)

________________________________________ 

Pennsylvania	23-1707341
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification Number)

1 Freedom Valley Drive, Oaks, Pennsylvania 19456-1100

(Address of principal executive offices)

(Zip Code)

(610) 676-1000

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

 ________________________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	ý	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨
		Emerging growth company	¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yes  ¨    No  ý

The number of shares outstanding of the registrant’s common stock as of April 19, 2018 was 158,084,303.

SEI Investments Company TABLE OF CONTENTS
PART I - FINANCIAL INFORMATION
		Page
Item 1.	Financial Statements.	2
	Consolidated Balance Sheets (Unaudited) -- March 31, 2018 and December 31, 2017	2
	Consolidated Statements of Operations (Unaudited) -- For the Three Months Ended March 31, 2018 and 2017	4
	Consolidated Statements of Comprehensive Income (Unaudited) -- For the Three Months Ended March 31, 2018 and 2017	5
	Consolidated Statements of Cash Flows (Unaudited) -- For the Three Months Ended March 31, 2018 and 2017	6
	Notes to Consolidated Financial Statements	7
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	22
Item 3.	Quantitative and Qualitative Disclosures About Market Risk.	34
Item 4.	Controls and Procedures.	34
PART II - OTHER INFORMATION
Item 1.	Legal Proceedings.	36
Item 1A.	Risk Factors.	37
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	37
Item 6.	Exhibits.	37
	Signatures	38

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PART I.        FINANCIAL INFORMATION

Item 1.    Consolidated Financial Statements.

SEI Investments Company

Consolidated Balance Sheets

(unaudited)

(In thousands, except par value)

	March 31, 2018		December 31, 2017
Assets
Current Assets:
Cash and cash equivalents	$	748,299	$	744,247
Restricted cash	3,507		3,505
Receivables from investment products	54,909		56,666
Receivables, net of allowance for doubtful accounts of $788 and $695	308,270		282,706
Securities owned	21,600		21,526
Other current assets	34,722		31,158
Total Current Assets	1,171,307		1,139,808
Property and Equipment, net of accumulated depreciation of $317,245 and $309,955	145,280		146,428
Capitalized Software, net of accumulated amortization of $361,065 and $350,045	312,272		310,405
Investments Available for Sale	83,089		87,983
Investments in Affiliated Funds, at fair value	5,534		6,034
Investment in Unconsolidated Affiliate	54,482		59,492
Goodwill	52,990		52,990
Intangible Assets, net of accumulated amortization of $2,328 and $1,552	27,802		28,578
Deferred Contract Costs	19,875		—
Deferred Income Taxes	2,740		2,767
Other Assets, net	18,334		18,884
Total Assets	$	1,893,705	$	1,853,369

The accompanying notes are an integral part of these consolidated financial statements.

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SEI Investments Company

Consolidated Balance Sheets

(unaudited)

(In thousands, except par value)

	March 31, 2018			December 31, 2017
Liabilities and Equity
Current Liabilities:
Accounts payable	$	8,463		$	5,268
Accrued liabilities	168,618			265,058
Deferred revenue	4,998			4,723
Total Current Liabilities	182,079			275,049
Borrowings Under Revolving Credit Facility	20,000			30,000
Long-term Income Taxes Payable	10,629			10,629
Deferred Income Taxes	54,384			48,472
Other Long-term Liabilities	12,959			12,380
Total Liabilities	280,051			376,530
Commitments and Contingencies
Shareholders' Equity:
Common stock, $.01 par value, 750,000 shares authorized; 157,990 and 157,069 shares issued and outstanding	1,580			1,571
Capital in excess of par value	1,085,312			1,027,709
Retained earnings	544,923			467,467
Accumulated other comprehensive loss, net	(18,161		)	(19,908		)
Total Shareholders' Equity	1,613,654			1,476,839
Total Liabilities and Shareholders' Equity	$	1,893,705		$	1,853,369

The accompanying notes are an integral part of these consolidated financial statements.

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SEI Investments Company

Consolidated Statements of Operations

(unaudited)

(In thousands, except per share data)

	Three Months Ended March 31,
	2018			2017
Revenues:
Asset management, administration and distribution fees	$	316,209		$	279,461
Information processing and software servicing fees	89,389			80,523
Total revenues	405,598			359,984
Expenses:
Subadvisory, distribution and other asset management costs	45,205			43,152
Software royalties and other information processing costs	8,718			11,971
Compensation, benefits and other personnel	124,277			108,943
Stock-based compensation	5,195			6,180
Consulting, outsourcing and professional fees	48,707			43,149
Data processing and computer related	20,591			18,325
Facilities, supplies and other costs	17,613			15,925
Amortization	11,854			12,022
Depreciation	7,122			6,800
Total expenses	289,282			266,467
Income from operations	116,316			93,517
Net (loss) gain from investments	(410		)	347
Interest and dividend income	2,502			1,343
Interest expense	(257		)	(112		)
Equity in earnings of unconsolidated affiliate	40,607			33,565
Income before income taxes	158,758			128,660
Income taxes	18,920			39,923
Net income	$	139,838		$	88,737
Basic earnings per common share	$	0.89		$	0.56
Shares used to compute basic earnings per share	157,434			159,091
Diluted earnings per common share	$	0.86		$	0.55
Shares used to compute diluted earnings per share	163,424			162,742

The accompanying notes are an integral part of these consolidated financial statements.

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SEI Investments Company

Consolidated Statements of Comprehensive Income

(unaudited)

(In thousands)

	Three Months Ended March 31,
	2018					2017
Net income			$	139,838				$	88,737
Other comprehensive gain (loss), net of tax:
Foreign currency translation adjustments			3,377					2,488
Unrealized loss on investments:
Unrealized losses during the period, net of income taxes of $424 and $19	(1,357	)				(24	)
Less: reclassification adjustment for gains realized in net income, net of income taxes of $(15) and $10	(273	)	(1,630		)	(22	)	(46		)
Total other comprehensive gain, net of tax			1,747					2,442
Comprehensive income			$	141,585				$	91,179

The accompanying notes are an integral part of these consolidated financial statements.

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SEI Investments Company

Consolidated Condensed Statements of Cash Flows

(unaudited)

(In thousands)

	Three Months Ended March 31,
	2018			2017
Cash flows from operating activities:
Net income	$	139,838		$	88,737
Adjustments to reconcile net income to net cash provided by operating activities (See Note 1)	(35,664		)	(15,725		)
Net cash provided by operating activities	104,174			73,012
Cash flows from investing activities:
Additions to property and equipment	(5,611		)	(3,205		)
Additions to capitalized software	(12,887		)	(16,861		)
Purchases of marketable securities	(15,466		)	(20,445		)
Prepayments and maturities of marketable securities	18,588			15,166
Net cash used in investing activities	(15,376		)	(25,345		)
Cash flows from financing activities:
Repayments under revolving credit facility	(10,000		)	—
Purchase and retirement of common stock	(87,995		)	(56,553		)
Proceeds from issuance of common stock	57,889			16,847
Payment of dividends	(47,179		)	(44,597		)
Net cash used in financing activities	(87,285		)	(84,303		)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,541			2,307
Net increase (decrease) in cash, cash equivalents and restricted cash	4,054			(34,329		)
Cash, cash equivalents and restricted cash, beginning of period	747,752			699,201
Cash, cash equivalents and restricted cash, end of period	$	751,806		$	664,872

The accompanying notes are an integral part of these consolidated financial statements.

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Notes to Consolidated Financial Statements

(all figures are in thousands except share and per share data)

Note 1.    Summary of Significant Accounting Policies

Nature of Operations

SEI Investments Company (the Company), a Pennsylvania corporation, provides investment processing, investment management, and investment operations platforms to financial institutions, financial advisors, institutional investors, investment managers and ultra-high-net-worth families in the United States, Canada, the United Kingdom, continental Europe and various other locations throughout the world.

Investment processing platforms consist of application and business process outsourcing services, professional services and transaction-based services. Revenues from investment processing platforms are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment management programs consist of mutual funds, alternative investments and separate accounts. These include a series of money market, equity, fixed-income and alternative investment portfolios, primarily in the form of registered investment companies. The Company serves as the administrator and investment advisor for many of these products. Revenues from investment management programs are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment operations platforms offer investment managers support for traditional investment products such as mutual funds, collective investment trusts, exchange-traded funds, and institutional and separate accounts, by providing outsourcing services including fund and investment accounting, administration, reconciliation, investor servicing and client reporting. These platforms also provide support to managers focused on alternative investments who manage hedge funds, funds of hedge funds, private equity funds and real estate funds, across registered, partnership and separate account structures domiciled in the United States and overseas. Revenues from investment operations platforms are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Basis of Presentation

The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Certain financial information and accompanying note disclosure normally included in the Company’s Annual Report on Form 10-K have been condensed or omitted. The interim financial information is unaudited but reflects all adjustments (consisting of only normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of financial position of the Company as of March 31, 2018, the results of operations for the three months ended March 31, 2018 and 2017, and cash flows for the three-month periods ended March 31, 2018 and 2017. These interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

The Company adopted the requirements of Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification (ASC) 606 (ASC 606)) using the modified retrospective method during the three months ended March 31, 2018. As a result of the adoption of ASC 606, the Company recorded a cumulative effect adjustment of $14,402 to retained earnings as of January 1, 2018. Prior period information has not been restated (see following caption "Revenue Recognition"). The Company also adopted ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (see Note 6) and ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230) (see following caption "Statements of Cash Flows"). All amounts and disclosures set forth in this Form 10-Q have been updated to comply with the new standards.

Revenue Recognition

Revenue is recognized when the transfer of control of promised goods or services under the terms of a contract with customers are satisfied in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those promised goods or services. Certain portions of the Company’s revenues involve a third party in providing goods or services to its customers. In such circumstances, the Company must determine whether the nature of its promise to the customer is to provide the underlying goods or services (the Company is the principal in the transaction and reports the transaction gross) or to arrange for a third party to provide the underlying goods or services (the entity is the agent in the transaction and reports the transaction net).

ASC 606 did not change the accounting for the majority of the Company’s revenue arrangements and did not have a material impact to the Company’s consolidated financial statements. The following is a summary of the impact from the adoption of ASC 606:

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•The majority of the Company’s services are bundled together, and provided and completed for the client on a monthly basis. For these revenue arrangements, the Company will continue to recognize revenue on a monthly basis as the client consumes the benefits continuously over time. The timing and recognition of revenues from these arrangements did not change.

•Contracts with new clients or with existing clients for new services generally include implementation fees. These fees are recognized in Information processing and software servicing fees when in connection with investment processing platforms and are recognized in Asset management, administration and distribution fees when in connection with investment operations platforms. The Company concluded that most of the current arrangements for implementation services are a distinct and separate performance obligation from the monthly recurring services. The timing and recognition of fees for most of these arrangements have not changed. However, each new revenue arrangement for implementation fees is analyzed to determine whether or not it is a distinct performance obligation. Implementation fees determined not to be a distinct performance obligation would be required to be recognized over the expected life of the client relationship along with the costs relating directly to satisfying such performance obligation. The Company will evaluate each contract in accordance with the requirements of ASC 606.

•Research services provided by SIDCO, the Company’s broker-dealer subsidiary, to customers in soft-dollar arrangements were determined to be a separate performance obligation. Research services provided by a broker-dealer may be internally generated or provided by a third party and paid directly by the broker-dealer on the customer’s behalf. It was determined that SIDCO is considered an agent since it does not control the research services before they are transferred to the customer. Therefore, fees received for research services should be recorded in revenues net of amounts paid for the soft dollar arrangement. These amounts paid by the Company were previously recorded gross as an expense and, beginning January 1, 2018, are recorded net of any revenue recognized. The amounts related to soft dollar arrangements during the three months ended March 31, 2018 and 2017 were $3,730 and $4,073, respectively.

•Incremental contract acquisition costs related to information processing contracts in the Private Banks segment and investment operations contracts in the Investment Managers segment will be deferred and recognized over the expected client life. These costs primarily consist of sales compensation payments to the Company's sales personnel. As a result, incremental contract acquisition costs are capitalized and subsequently amortized. The Company recorded a cumulative effect adjustment to retained earnings associated with the capitalization of contract costs. For the Company's other sales compensation payments, the Company either applies the practical expedient permitting the expensing of costs to obtain a contract when the expected amortization period is one year or less or there are no contract acquisition costs required to be deferred under the requirements of ASC 606.

Cash and Cash Equivalents

Cash and cash equivalents includes $341,413 and $401,292 at March 31, 2018 and December 31, 2017, respectively, primarily invested in SEI-sponsored open-ended money market mutual funds. The SEI-sponsored mutual funds are Level 1 assets.

Restricted Cash

Restricted cash includes $3,000 at March 31, 2018 and December 31, 2017 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $507 and $505 at March 31, 2018 and December 31, 2017, respectively, segregated in special reserve accounts for the benefit of customers of the Company’s broker-dealer subsidiary, SEI Investments Distribution Co. (SIDCO), in accordance with certain rules established by the Securities and Exchange Commission (SEC) for broker-dealers.

Capitalized Software

The Company capitalized $12,887 and $16,861 of software development costs during the three months ended March 31, 2018 and 2017, respectively. The Company's software development costs primarily relate to the continued development of the SEI Wealth Platform^SM (the Platform). The Company capitalized $12,042 and $15,178 of software development costs for significant enhancements to the Platform during the three months ended March 31, 2018 and 2017, respectively. As of March 31, 2018, the net book value of the Platform was $287,530. The net book value includes $33,237 of capitalized software development costs in-progress associated with future releases. The Platform has a weighted average remaining life of 8.4 years. Amortization expense for the Platform was $9,719 and $11,972 during the three months ended March 31, 2018 and 2017, respectively.

The Company also capitalized $845 and $1,683 of software development costs during the three months ended March 31, 2018 and 2017, respectively, related to an application for the Investment Managers segment. The application was placed into service during the first quarter 2018 with an estimated useful life of 5 years. The net book value of the application at March 31, 2018 was $24,742. Amortization expense for the application was $1,301 during the three months ended March 31, 2018.

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Earnings per Share

The calculations of basic and diluted earnings per share for the three months ended March 31, 2018 and 2017 are:

	Three Months Ended March 31,
	2018		2017
Net income	$	139,838	$	88,737
Shares used to compute basic earnings per common share	157,434,000		159,091,000
Dilutive effect of stock options	5,990,000		3,651,000
Shares used to compute diluted earnings per common share	163,424,000		162,742,000
Basic earnings per common share	$	0.89	$	0.56
Diluted earnings per common share	$	0.86	$	0.55

During the three months ended March 31, 2018 and 2017, employee stock options to purchase 6,054,000 and 11,279,000 shares of common stock with an average exercise price of $52.73 and $37.70, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three month periods were not included in the computation of diluted earnings per common share because either the performance conditions have not been satisfied or would have been satisfied if the reporting date was the end of the contingency period or the option’s exercise price was greater than the average market price of the Company’s common stock and the effect on diluted earnings per common share would have been anti-dilutive.

Reclassifications

Certain prior year amounts have been reclassified to conform to current year presentation.

New Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases (ASU 2016-02) requiring lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The updated standard is effective for the Company beginning in the first quarter of 2019. Early adoption is permitted. While the Company is not yet in a position to assess the full impact of the adoption of ASU 2016-02 on its consolidated financial statements and related disclosures, the Company is currently in the process of cataloging existing lease agreements and evaluating the transition method to be elected.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) which requires that expected credit losses relating to financial assets measured on an amortized cost basis and available-for-sale debt securities be recorded through an allowance for credit losses. ASU 2016-13 limits the amount of credit losses to be recognized for available-for-sale debt securities to the amount by which carrying value exceeds fair value and also requires the reversal of previously recognized credit losses if fair value increases. ASU 2016-13 becomes effective for the Company during the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures.

In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04). The objective of ASU 2017-04 is to simplify the subsequent measurement of goodwill by entities performing their annual goodwill impairment tests by comparing the fair value of a reporting unit, including income tax effects from any tax-deductible goodwill, with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds fair value. ASU 2017-04 is effective for the Company beginning in the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2017-04 on its consolidated financial statements and related disclosures.

Statements of Cash Flows

For purposes of the Consolidated Statements of Cash Flows, the Company considers investment instruments purchased with an original maturity of three months or less to be cash equivalents.

The Company adopted ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230) (ASU 2016-18) on January 1, 2018 which requires that a statement of cash flows explain the change during the period for the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The prior period was retrospectively adjusted to conform to the current period’s presentation. There was no impact to net cash flows for the three months ended March 31, 2017 as a result of including restricted cash with cash and cash equivalents when reconciling the

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beginning-of-period and end-of-period total amounts presented on the accompanying Consolidated Condensed Statement of Cash Flows in accordance with ASU 2016-18.

The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the three months ended March 31:

	2018			2017
Net income	$	139,838		$	88,737
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,122			6,800
Amortization	11,854			12,022
Equity in earnings of unconsolidated affiliate	(40,607		)	(33,565		)
Distributions received from unconsolidated affiliate	45,617			35,265
Stock-based compensation	5,195			6,180
Provision for losses on receivables	93			(5		)
Deferred income tax expense	2,083			877
Net gain from investments	410			(347		)
Change in other long-term liabilities	579			965
Change in other assets	290			(849		)
Other	(784		)	56
Change in current assets and liabilities
Decrease (increase) in
Receivables from investment products	1,757			10,308
Receivables	(25,657		)	(24,243		)
Other current assets	(3,564		)	(2,298		)
Increase (decrease) in
Accounts payable	3,195			1,406
Accrued liabilities	(43,522		)	(27,754		)
Deferred revenue	275			(543		)
Total adjustments	(35,664		)	(15,725		)
Net cash provided by operating activities	$	104,174		$	73,012

Note 2. Investment in Unconsolidated Affiliate

LSV Asset Management

The Company has an investment in LSV Asset Management (LSV), a registered investment advisor that provides investment advisory services primarily to institutions, including pension plans and investment companies. LSV is currently an investment sub-advisor for a limited number of SEI-sponsored investment products. The Company accounts for its interest in LSV using the equity method because of its less than 50 percent ownership. The Company’s interest in the net assets of LSV is reflected in Investment in unconsolidated affiliate on the accompanying Consolidated Balance Sheets and its interest in the earnings of LSV is reflected in Equity in earnings of unconsolidated affiliate on the accompanying Consolidated Statements of Operations.

At March 31, 2018, the Company’s total investment in LSV was $54,482. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $45,617 and $35,265 in the three months ended March 31, 2018 and 2017, respectively. As such, the Company considers these distribution payments as returns on investment rather than returns of the Company's original investment in LSV and has therefore classified the associated cash inflows as an operating activity on the Consolidated Statements of Cash Flows.

The Company’s proportionate share in the earnings of LSV was $40,607 and $33,565 during the three months ended March 31, 2018 and 2017, respectively.

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These tables contain condensed financial information of LSV: 

Condensed Statement of Operations	Three Months Ended March 31,
	2018		2017
Revenues	$	131,718	$	109,953
Net income	104,406		86,215

Condensed Balance Sheets	March 31, 2018		December 31, 2017
Current assets	$	143,922	$	155,239
Non-current assets	1,444		1,407
Total assets	$	145,366	$	156,646
Current liabilities	$	47,641	$	46,486
Partners’ capital	97,725		110,160
Total liabilities and partners’ capital	$	145,366	$	156,646

Note 3.    Variable Interest Entities – Investment Products

The Company or its affiliates have created numerous investment products for its clients in various types of legal entity structures. The Company serves as the Manager, Administrator and Distributor for these investment products and may also serve as the Trustee for some of the investment products. The Company receives asset management, distribution, administration and custodial fees for these services. Clients are the equity investors and participate in proportion to their ownership percentage in the net income or loss and net capital gains or losses of the products, and, on liquidation, will participate in proportion to their ownership percentage in the remaining net assets of the products after satisfaction of outstanding liabilities.

The Company has concluded that it is not the primary beneficiary of the entities and; therefore, is not required to consolidate any of the pooled investment vehicles for which it receives asset management, distribution, administration and custodial fees under the VIE model. The entities either do not meet the definition of a VIE or the Company does not hold a variable interest in the entities. The entities either qualify for the money market scope exception, or are entities in which the Company’s asset management, distribution, administration and custodial fees are commensurate with the services provided and include fair terms and conditions, or are entities that are limited partnerships which have substantive kick-out rights. The Company acts as a fiduciary and does not hold any other interests other than insignificant seed money investments in the pooled investment vehicles. For this reason, the Company also concluded that it is not required to consolidate the pooled investment vehicles under the voting interest entity (VOE) model.

The Company is a party to expense limitation agreements with certain SEI-sponsored money market funds subject to Rule 2a-7 of the Investment Company Act of 1940 which establish a maximum level of ordinary operating expenses incurred by the fund in any fiscal year including, but not limited to, fees of the administrator or its affiliates. Under the terms of these agreements, the Company waived $6,654 and $7,072 in fees during the three months ended March 31, 2018 and 2017, respectively.

Note 4. Composition of Certain Financial Statement Captions

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2018			December 31, 2017
Trade receivables	$	72,764		$	76,760
Fees earned, not billed	220,414			194,331
Other receivables	15,880			12,310
	309,058			283,401
Less: Allowance for doubtful accounts	(788		)	(695		)
	$	308,270		$	282,706

Fees earned, not billed represents receivables earned but unbilled and results from timing differences between services provided and contractual billing schedules. These billing schedules generally provide for fees to be billed on a quarterly basis.

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In addition, certain fees earned from investment operations services are calculated based on assets under administration that have a prolonged valuation process which delays billings to clients.

Receivables from investment products on the accompanying Consolidated Balance Sheets primarily represent fees receivable for distribution, investment advisory, and administration services to various regulated investment companies and other investment products sponsored by SEI.

Property and Equipment

Property and Equipment on the accompanying Consolidated Balance Sheets consists of:

	March 31, 2018			December 31, 2017
Buildings	$	154,007		$	153,961
Equipment	118,823			115,546
Land	10,557			10,030
Purchased software	136,226			134,610
Furniture and fixtures	18,320			18,114
Leasehold improvements	18,851			18,017
Construction in progress	5,741			6,105
	462,525			456,383
Less: Accumulated depreciation	(317,245		)	(309,955		)
Property and Equipment, net	$	145,280		$	146,428

The Company recognized $7,122 and $6,800 in depreciation expense related to property and equipment for the three months ended March 31, 2018 and 2017, respectively.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2018		December 31, 2017
Accrued employee compensation	$	28,714	$	88,960
Accrued consulting, outsourcing and professional fees	35,682		29,658
Accrued sub-advisory, distribution and other asset management fees	39,680		42,365
Accrued dividend payable	—		47,179
Accrued income taxes	19,282		5,583
Other accrued liabilities	45,260		51,313
Total accrued liabilities	$	168,618	$	265,058

Note 5.    Fair Value Measurements

The fair value of the Company’s financial assets and liabilities, except for the Company's investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the Company’s Level 1 financial assets consist mainly of investments in open-ended mutual funds that are quoted daily. Level 2 financial assets consist of Government National Mortgage Association (GNMA) mortgage-backed securities held by the Company's wholly-owned limited purpose federal thrift subsidiary, SEI Private Trust Company (SPTC), Federal Home Loan Bank (FHLB) and other U.S. government agency short-term notes held by SIDCO. The financial assets held by SIDCO were purchased as part of a cash management program requiring only short term, top-tier investment grade government and corporate securities. The financial assets held by SPTC are debt securities issued by GNMA and are backed by the full faith and credit of the U.S. government. These securities were purchased for the sole purpose of satisfying applicable regulatory requirements and have maturity dates which range from 2021 to 2041.

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

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The valuation of the Company's Level 2 financial assets held by SIDCO and SPTC are based upon securities pricing policies and procedures utilized by third-party pricing vendors.

The pricing policies and procedures applied for our Level 1 and Level 2 financial assets during the three months ended March 31, 2018 were consistent with those as described in our Annual Report on Form 10-K at December 31, 2017. The Company had no Level 3 financial assets or liabilities at March 31, 2018 or December 31, 2017 that were required to be measured at fair value on a recurring basis. There were no transfers of financial assets between levels within the fair value hierarchy during the three months ended March 31, 2018.

The fair value of certain financial assets of the Company was determined using the following inputs:

			Fair Value Measurements at the End of the Reporting Period Using
Assets	March 31, 2018		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity available-for-sale securities	$	11,316	$	11,316	$	—
Fixed-income available-for-sale securities	71,773		—		71,773
Fixed-income securities owned	21,600		—		21,600
Investment funds sponsored by LSV (1)	5,534
	$	110,223	$	11,316	$	93,373

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2017		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity available-for-sale securities	$	11,250	$	11,250	$	—
Fixed-income available-for-sale securities	76,733		—		76,733
Fixed-income securities owned	21,526		—		21,526
Investment funds sponsored by LSV (1)	6,034
	$	115,543	$	11,250	$	98,259

(1) The fair value amounts presented in the tables above are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the accompanying Consolidated Balance Sheets (See Note 6).

Note 6.    Marketable Securities

Investments Available for Sale

Investments available for sale classified as non-current assets consist of: 

	At March 31, 2018
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
SEI-sponsored mutual funds	$	7,382	$	96	$	(50	)	$	7,428
Equities and other mutual funds	3,483		405		—			3,888
Debt securities	74,431		—		(2,658		)	71,773
	$	85,296	$	501	$	(2,708	)	$	83,089

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	At December 31, 2017
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
SEI-sponsored mutual funds	$	7,369	$	110	$	(143	)	$	7,336
Equities and other mutual funds	3,456		458		—			3,914
Debt securities	77,745		—		(1,012		)	76,733
	$	88,570	$	568	$	(1,155	)	$	87,983

The Company adopted ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01) on January 1, 2018 which requires the Company to recognize all changes in fair value of available-for-sale equity securities in current period earnings. Previously, these changes in fair value were recognized as a separate component of comprehensive income. The adoption of ASU 2016-01 did not have a material impact to the Company's consolidated financial statements.

Net unrealized losses at March 31, 2018 and December 31, 2017 of the Company's available-for-sale debt securities were $2,016 (net of income tax benefit of $642) and $779 (net of income tax benefit of $233), respectively. These net unrealized losses are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

There were no material realized gains or losses from available-for-sale securities during the three months ended March 31, 2018 and 2017. Gains and losses from available-for-sale securities, including amounts reclassified from accumulated comprehensive loss, are reflected in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

Investments in Affiliated Funds

The Company has an investment in funds sponsored by LSV. The Company records this investment on the accompanying Consolidated Balance Sheets at fair value. Unrealized gains and losses from the change in fair value of these funds are recognized in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

The investment primarily consists of U.S. dollar denominated funds that invest primarily in securities of Canadian, Australian and Japanese companies as well as various other global securities. The underlying securities held by the funds are translated into U.S. dollars within the funds. The funds had a fair value of $5,534 and $6,034 at March 31, 2018 and December 31, 2017, respectively. The Company recognized losses of $500 and gains of $298 during the three months ended March 31, 2018 and 2017, respectively, from the change in fair value of the funds.

Securities Owned

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency securities with maturity dates less than one year. These investments are reflected as Securities owned on the accompanying Consolidated Balance Sheets. Due to specialized accounting practices applicable to investments by broker-dealers, the securities are reported at fair value and changes in fair value are recorded in current period earnings. The securities had a fair value of $21,600 and $21,526 at March 31, 2018 and December 31, 2017, respectively. There were no material net gains or losses related to the securities during the three months ended March 31, 2018 and 2017.

Note 7.    Line of Credit

The Company has a five-year $300,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, National Association, and a syndicate of other lenders. The Credit Facility is scheduled to expire in June 2021, at which time any aggregate principal amount of loans outstanding becomes payable in full. Any borrowings made under the Credit Facility will accrue interest at rates that, at the Company's option, are based on a base rate (the Base Rate) plus a premium that can range from 0.25 percent to 1.00 percent or the London InterBank Offered Rate (LIBOR) plus a premium that can range from 1.25 percent to 2.00 percent depending on the Company’s Leverage Ratio (a ratio of consolidated indebtedness to consolidated EBITDA for the four preceding fiscal quarters, all as defined in the related agreement). The Base Rate is defined as the highest of a) the Federal Funds Rate, as published by the Federal Reserve Bank of New York, plus 0.50 percent, b) the prime commercial lending rate of Wells Fargo, c) the applicable LIBOR plus 1.00 percent, or d) 0 percent. The Company also pays quarterly commitment fees based on the unused portion of the Credit Facility. The quarterly fees for the Credit Facility can range from 0.15 percent of the amount of the unused portion to 0.30 percent, depending on the Company’s Leverage Ratio. Certain wholly-owned subsidiaries of the Company have guaranteed the obligations of the Company under the agreement. The aggregate amount of the Credit Facility may be increased by an additional $100,000 under certain conditions set forth in the agreement.

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The Credit Facility contains covenants that restrict the ability of the Company to engage in mergers, consolidations, asset sales, investments, transactions with affiliates, or to incur liens, as defined in the agreement. In the event of a default under the Credit Facility, the Company would also be restricted from paying dividends on, or repurchasing, its common stock without the approval of the lenders. None of the covenants of the Credit Facility negatively affect the Company’s liquidity or capital resources. Upon the occurrence of certain financial or economic events, significant corporate events, or certain other events of default constituting an event of default under the Credit Facility, all loans outstanding may be declared immediately due and payable and all commitments under the agreement may be terminated.

In July 2017, the Company borrowed $40,000 under the Credit Facility for the funding of an acquisition. As of March 31, 2018, the outstanding balance of the Credit Facility was $20,000 and is included in Borrowings Under Revolving Credit Facility on the accompanying Consolidated Balance Sheet. The Company was in compliance with all covenants of the Credit Facility during the three months ended March 31, 2018.

In April 2018, the Company made a principal payment of $20,000 to fully repay the outstanding balance of the Credit Facility. As of April 19, 2018, the amount of the Credit Facility that is available for general corporate purposes was $300,000.

Note 8.    Shareholders’ Equity

Stock-Based Compensation

The Company has only non-qualified stock options outstanding under its equity compensation plans. All outstanding stock options have performance-based vesting provisions specific to each option grant that tie the vesting of the applicable stock options to the Company’s financial performance. The Company’s stock options vest at a rate of 50 percent when a specified diluted earnings per share target is achieved, and the remaining 50 percent when a second, higher specified diluted earnings per share target is achieved. Options do not vest due to the passage of time but solely as a result of achievement of the financial vesting targets. Options granted in December 2017 include a service condition which requires a minimum two or four year waiting period from the grant date along with the attainment of the applicable financial vesting target. Earnings per share targets exclude the impact of stock-based compensation and are established at time of grant. The targets are measured annually on December 31. The amount of stock-based compensation expense recognized in the period is based upon management’s estimate of when the earnings per share targets may be achieved. Any change in management’s estimate could result in the remaining amount of stock-based compensation expense to be accelerated, spread out over a longer period, or reversed. This may cause volatility in the recognition of stock-based compensation expense in future periods and could materially affect the Company’s earnings.

The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three months ended March 31, 2018 and 2017, respectively, as follows: 

	Three Months Ended March 31,
	2018			2017
Stock-based compensation expense	$	5,195		$	6,180
Less: Deferred tax benefit	(1,103		)	(2,153		)
Stock-based compensation expense, net of tax	$	4,092		$	4,027

As of March 31, 2018, there was approximately $56,579 of unrecognized compensation cost remaining related to unvested employee stock options that management expects will vest and is being amortized.

The Company issues new common shares associated with the exercise of stock options. The total intrinsic value of options exercised during the three months ended March 31, 2018 was $93,668. The total options exercisable as of March 31, 2018 had an intrinsic value of $393,003. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of March 31, 2018 and the weighted average exercise price of the shares. The market value of the Company’s common stock as of March 31, 2018 was $74.91 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of March 31, 2018 was $29.20. Total options that were outstanding as of March 31, 2018 were 14,652,000. Total options that were exercisable as of March 31, 2018 were 8,598,000.

Common Stock Buyback

The Company’s Board of Directors, under multiple authorizations, has authorized the repurchase of the Company’s common stock on the open market or through private transactions. The Company purchased 1,122,000 shares at a total cost of $82,257 during the three months ended March 31, 2018, which reduced the total shares outstanding of common stock. The cost of stock purchases during the period includes the cost of certain transactions that settled in the following quarter. As of March 31, 2018, the Company had approximately $88,380 of authorization remaining for the purchase of common stock under the program.

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The Company immediately retires its common stock when purchased. Upon retirement, the Company reduces Capital in excess of par value for the average capital per share outstanding and the remainder is charged against Retained earnings. If the Company reduces its Retained earnings to zero, any subsequent purchases of common stock will be charged entirely to Capital in excess of par value.

Note 9.    Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss, net of tax, are as follows: 

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Investments			Accumulated Other Comprehensive Loss
Balance, January 1, 2018	$	(19,522	)	$	(386	)	$	(19,908	)
Other comprehensive gain before reclassifications	3,377			(1,357		)	2,020
Amounts reclassified from accumulated other comprehensive loss	—			(273		)	(273		)
Net current-period other comprehensive gain	3,377			(1,630		)	1,747
Balance, March 31, 2018	$	(16,145	)	$	(2,016	)	$	(18,161	)

Note 10.    Business Segment Information

The Company’s reportable business segments are:

Private Banks – provides outsourced investment processing and investment management platforms to banks and trust institutions, independent wealth advisers and financial advisors worldwide;

Investment Advisors – provides investment management and investment processing platforms to affluent investors through a network of independent registered investment advisors, financial planners and other investment professionals in the United States;

Institutional Investors – provides investment management and administrative outsourcing platforms to retirement plan sponsors, healthcare systems and not-for-profit organizations worldwide;

Investment Managers – provides investment operations outsourcing platforms to fund companies, banking institutions and both traditional and non-traditional investment managers worldwide; and

Investments in New Businesses – focuses on providing investment management programs to ultra-high-net-worth families residing in the United States; developing internet-based investment services and advice platforms; entering new markets; and conducting other research and development activities.

The information in the following tables is derived from the Company’s internal financial reporting used for corporate management purposes. There are no inter-segment revenues for the three months ended March 31, 2018 and 2017. Management evaluates Company assets on a consolidated basis during interim periods. The accounting policies of the reportable business segments are the same as those described in Note 1 to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

The following tables highlight certain financial information about each of the Company’s business segments for the three months ended March 31, 2018 and 2017.

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses			Total
	For the Three Months Ended March 31, 2018
Revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896		$	405,598
Expenses	112,202		52,453		41,249		63,338		5,098			274,340
Operating profit (loss)	$	9,962	$	46,739	$	44,242	$	33,517	$	(3,202	)	$	131,258

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	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses			Total
	For the Three Months Ended March 31, 2017
Revenues	$	112,634	$	88,238	$	77,004	$	80,487	$	1,621		$	359,984
Expenses	108,550		47,539		38,828		52,065		4,880			251,862
Operating profit (loss)	$	4,084	$	40,699	$	38,176	$	28,422	$	(3,259	)	$	108,122

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017 is as follows: 

	2018			2017
Total operating profit from segments	$	131,258		$	108,122
Corporate overhead expenses	(14,942		)	(14,605		)
Income from operations	$	116,316		$	93,517

The following tables provide additional information for the three months ended March 31, 2018 and 2017 pertaining to our business segments: 

	Capital Expenditures (1)				Depreciation
	2018		2017		2018		2017
Private Banks	$	10,239	$	12,850	$	3,319	$	4,410
Investment Advisors	4,260		4,532		1,105		733
Institutional Investors	967		811		448		227
Investment Managers	2,520		1,615		1,809		916
Investments in New Businesses	204		106		150		368
Total from business segments	$	18,190	$	19,914	$	6,831	$	6,654
Corporate overhead	308		152		291		146
	$	18,498	$	20,066	$	7,122	$	6,800

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2018		2017
Private Banks	$	6,627	$	8,464
Investment Advisors	2,357		2,850
Institutional Investors	427		323
Investment Managers	2,345		216
Investments in New Businesses	40		119
Total from business segments	$	11,796	$	11,972
Corporate overhead	58		50
	$	11,854	$	12,022

Note 11.    Income Taxes

The gross liability for unrecognized tax benefits at March 31, 2018 and December 31, 2017 was $14,685 and $14,480, respectively, exclusive of interest and penalties, of which $13,986 and $13,737 would affect the effective tax rate if the Company were to recognize the tax benefit.

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The Company classifies interest and penalties on unrecognized tax benefits as income tax expense. As of March 31, 2018 and December 31, 2017, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $1,218 and $1,175, respectively.

	March 31, 2018		December 31, 2017
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	14,685	$	14,480
Interest and penalties on unrecognized benefits	1,218		1,175
Total gross uncertain tax positions	$	15,903	$	15,655
Amount included in Current liabilities	$	2,944	$	3,275
Amount included in Other long-term liabilities	12,959		12,380
	$	15,903	$	15,655

The Company's effective income tax rate for the three months ended March 31, 2018 and 2017 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2018		2017
Statutory rate	21.0	%	35.0	%
State taxes, net of federal tax benefit	2.2		1.5
Foreign tax expense and tax rate differential	(0.2	)	(0.8	)
Tax benefit from stock option exercises	(10.8	)	(4.2	)
Other, net	(0.3	)	(0.5	)
	11.9	%	31.0	%

The decrease in the tax rate for the three months ended March 31, 2018 was primarily due to the tax changes enacted in the 2017 Tax Cut and Jobs Act (The Tax Act). The Tax Act was enacted on December 22, 2017 and included a permanent reduction in the corporate tax rate from 35.0 percent to 21.0 percent. In addition, the rate was favorably impacted by an increase in the excess tax benefits recognized on stock-based compensation expense due to a higher volume of stock option exercise activity.

The Tax Act also imposed a territorial rather than worldwide system which requires a one-time transition tax on the repatriation of previously deferred foreign earnings. The Company's estimate of the one-time transition tax as of March 31, 2018 was $11,544, of which $915 is expected to be paid within one year and $10,629 is included in Long-term income taxes payable on the accompanying Consolidated Balance Sheet.

The Company files income tax returns in the United States on a consolidated basis and in many U.S. state and foreign jurisdictions. The Company is subject to examination of income tax returns by the Internal Revenue Service (IRS) and other domestic and foreign tax authorities. The Company is no longer subject to U.S. federal income tax examination for years before 2014 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2013.

The Company estimates it will recognize $2,944 of gross unrecognized tax benefits. This amount is expected to be paid within one year or to be removed at the expiration of the statute of limitations and resolution of income tax audits and is netted against the current payable account. These unrecognized tax benefits are related to tax positions taken on certain federal, state, and foreign tax returns. However, the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year. While it is reasonably possible that some issues under examination could be resolved in the next twelve months, based upon the current facts and circumstances, the Company cannot reasonably estimate the timing of such resolution or the total range of potential changes as it relates to the current unrecognized tax benefits that are recorded as part of the Company’s financial statements.

Note 12.    Commitments and Contingencies

In the normal course of business, the Company is party to various claims and legal proceedings.

SEI has been named in seven lawsuits filed in Louisiana courts; four of the cases also name SPTC as a defendant. The underlying allegations in all actions relate to the purported role of SPTC in providing back-office services to Stanford Trust Company. The complaints allege that SEI and SPTC participated in some manner in the sale of “certificates of deposit” issued by Stanford International Bank so as to be a “seller” of the certificates of deposit for purposes of primary liability under the Louisiana Securities Law or so as to be secondarily liable under that statute for sales of certificates of deposit made by Stanford

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Trust Company. Two of the actions also include claims for violations of the Louisiana Racketeering Act and possibly conspiracy, and a third also asserts claims of negligence, breach of contract, breach of fiduciary duty, violations of the uniform fiduciaries law, negligent misrepresentation, detrimental reliance, violations of the Louisiana Racketeering Act, and conspiracy.

The procedural status of the seven cases varies. The Lillie case, filed originally in the 19th Judicial District Court for the Parish of East Baton Rouge, was brought as a class action and is procedurally the most advanced of the cases. SEI and SPTC filed exceptions, which the Court granted in part, dismissing claims under the Louisiana Unfair Trade Practices Act and permitting the claims under the Louisiana Securities Law to go forward. On March 11, 2013, newly-added insurance carrier defendants removed the case to the United States District Court for the Middle District of Louisiana. On August 7, 2013, the Judicial Panel on Multidistrict Litigation transferred the matter to the Northern District of Texas where MDL 2099, In re: Stanford Entities Securities Litigation (“the Stanford MDL”), is pending. On September 22, 2015, the District Court on the motion of SEI and SPTC dismissed plaintiffs’ claims for primary liability under Section 714(A) of the Louisiana Securities Law, but declined to dismiss plaintiffs’ claims for secondary liability under Section 714(B) of the Louisiana Securities Law based on the allegations pled by plaintiffs. On November 4, 2015, the District Court granted SEI and SPTC's motion to dismiss plaintiffs' claims under Section 712(D) of the Louisiana Securities Law. Consequently, the only claims of plaintiffs still pending before the District Court in Lillie are plaintiffs' claims for secondary liability against SEI and SPTC under Section 714(B) of the Louisiana Securities Law. On May 2, 2016, the District Court certified the class as being "all persons for whom Stanford Trust Company purchased or renewed Stanford Investment Bank Limited certificates of deposit in Louisiana between January 1, 2007 and February 13, 2009". Notice of the pendency of the class action was mailed to potential class members on October 4, 2016.

On December 1, 2016, a group of plaintiffs who opted out of the Lillie class filed a complaint against SEI and SPTC in the United States District Court in the Middle District of Louisiana, alleging claims essentially the same as those in Lillie. In January 2017, the Judicial Panel on Multidistrict Litigation transferred the proceeding to the Northern District of Texas and the Stanford MDL. During February 2017, SEI filed its response to the Complaint and in March 2017 the District Court for the Northern District of Texas approved the stipulated dismissal of all claims in this complaint predicated on Section 712(D) or Section 714(A) of the Louisiana Securities Law.

Another one of the cases, filed in the 23rd Judicial District Court for the Parish of Ascension, also was removed to federal court and transferred by the Judicial Panel on Multidistrict Litigation to the Northern District of Texas and the Stanford MDL. The schedule for responding to that Complaint has not yet been established.

The plaintiffs in two of the cases remaining in the Parish of East Baton Rouge have granted SEI and SPTC indefinite extensions to respond to the petitions.

In the two additional cases, filed in East Baton Rouge and brought by the same counsel who filed the Lillie action, virtually all of the litigation to date has involved motions practice and appellate litigation regarding the existence of federal subjection matter jurisdiction under the federal Securities Litigation Uniform Standards Act (SLUSA). After the matter was removed to the United States District Court for the Northern District of Texas, that court dismissed the action under SLUSA. The Court of Appeals for the Fifth Circuit reversed that order, and the Supreme Court of the United States affirmed the Court of Appeals judgment on February 26, 2014. The matter was remanded to state court and no material activity has taken place since that date.

While the outcome of this litigation remains uncertain, SEI and SPTC believe that they have valid defenses to plaintiffs' claims and intend to defend the lawsuits vigorously. Because of uncertainty in the make-up of the Lillie class, the specific theories of liability that may survive a motion for summary judgment or other dispositive motion, the relative lack of discovery regarding damages, causation, mitigation and other aspects that may ultimately bear upon loss, the Company is not reasonably able to provide an estimate of loss, if any, with respect to the foregoing lawsuits.

Note 13.    Goodwill and Intangible Assets

In July 2017, the Company acquired all ownership interests of Archway Technology Partners, LLC, Archway Finance & Operations, Inc. and Keystone Capital Holdings, LLC (collectively, Archway), a provider of operating technologies and services to the family office industry. The total purchase price was allocated to Archway’s net tangible and intangible assets based upon their estimated fair values at the date of purchase. The excess purchase price over the value of the net tangible and identifiable intangible assets was recorded as goodwill. The total amount of goodwill from this transaction amounted to $52,990 and is included on the accompanying Consolidated Balance Sheets.

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The Company identified intangible assets related to Archway that met the contractual-legal criterion for recognition apart from goodwill. The identifiable intangible assets included on the accompanying Consolidated Balance Sheets consist of:

	March 31, 2018			December 31, 2017
Acquired technology	$	13,510		$	13,510
Client relationships	10,760			10,760
Non-competition agreements	3,470			3,470
Trade name	2,390			2,390
	30,130			30,130
Less: Accumulated amortization	(2,328		)	(1,552		)
Intangible assets, net	$	27,802		$	28,578

The Company recognized $776 of amortization expense related to the intangible assets during the three months ended March 31, 2018. Goodwill and the identifiable intangible assets related to Archway have been allocated to the Investment Managers segment.

Note 14.    Revenues from Contracts with Customers

The Company’s principal sources of revenues are: (1) asset management, administration and distribution fees primarily earned based upon a contractual percentage of net assets under management or administration; and (2) information processing and software servicing fees that are either recurring and primarily earned based upon the number of trust accounts being serviced or a percentage of the total average daily market value of the clients' assets processed on the Company's platforms, or non-recurring and based upon project-oriented contractual agreements related to client implementations.

Disaggregation of Revenue

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the three months ended March 31, 2018:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2018
Investment management fees from pooled investment products	$	35,190	$	72,418	$	15,858	$	—	$	225	$	123,691
Investment management fees from investment management agreements	198		22,764		69,276		83		1,634		93,955
Investment operations fees	382		—		—		87,455		—		87,837
Investment processing fees - PaaS	44,585		—		—		483		—		45,068
Investment processing fees - SaaS	34,602		—		—		2,365		—		36,967
Professional services fees	5,419		—		—		1,887		—		7,306
Account fees and other	1,788		4,010		357		4,582		37		10,774
Total revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896	$	405,598
Primary Geographic Markets:
United States	$	78,133	$	99,192	$	64,768	$	91,759	$	1,896	$	335,748
United Kingdom	27,525		—		14,787		—		—		42,312
Canada	11,601		—		2,671		—		—		14,272
Ireland	4,905		—		2,427		5,096		—		12,428
Other	—		—		838		—		—		838
Total revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896	$	405,598

Investment management fees from pooled investment products - Revenues associated with clients' assets invested in Company-sponsored pooled investment products. Contractual fees are stated as a percentage of the average market value of assets under management and collected on a monthly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

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Investment management fees from Investment Management agreements - Revenues based on assets of clients of the Institutional Investors segment primarily invested in Company-sponsored products. Each client is charged an investment management fee that is stated as a percentage of the average market value of all assets under management. The client is billed directly on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Revenues associated with the separately managed account program offered through registered investment advisors located throughout the United States. The contractual fee is stated as a percentage of the average market value of all assets invested in the separately managed account and collected on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment operations fees - Revenues earned from accounting and administrative services, distribution support services and regulatory and compliance services to investment management firms that offer traditional and alternative products. The Company contracts directly with the investment management firm. The contractual fees are stated as a percentage of net assets under administration and billed when asset valuations are finalized. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment Processing fees - Software as a Service - Revenues associated with clients that outsource investment processing technology software and computer processing by accessing our proprietary software and data center remotely but retain responsibility for all investment operations, client administration and other back-office trust operations. The contractual fee is based on a monthly fee plus additional fees determined on a per-account or per-transaction basis. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment Processing fees - Platform as a Service - Revenues associated with clients that outsource their entire investment operation and back-office processing functions. Through the use of the Company's proprietary platforms, the Company assumes all back-office investment processing services including investment processing, custody and safekeeping of assets, income collections, securities settlement and other related trust activities. The contractual fee is based on a monthly fee plus additional fees determined on a per-account or per-transaction basis. Contractual fees can also be stated as a percentage of the value of assets processed on the Company's platforms each month as long as the fee is in excess of a monthly contractual minimum. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Professional Services - Revenues associated with the business services migration for investment processing clients of the Private Banks segment and investment operations clients of the Investment Managers segment. In addition, Professional services include other services such as business transformation consulting. Typically, fees are stated as a contractual fixed fee. The client is billed directly and fees are collected according to the terms of the agreement.

Other - Revenues associated with custody account servicing, account terminations, reimbursements received for out-of-pocket expenses, and other fees for the provision of ancillary services.

Revenue is recognized by the Company when the performance obligations are satisfied and transfer of control to the client is completed. The majority of the Company’s performance obligations are satisfied and control is transferred to the client continuously. Therefore, revenue is recognized on a monthly basis. The amount of revenue recognized reflects the amount of consideration expected to be received by the Company in exchange for satisfied performance obligations.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $19,875 as of March 31, 2018. The expense related to the deferred contract costs during the three months ended March 31, 2018 was immaterial. There was no impairment loss in relation to the costs capitalized during the three months ended March 31, 2018.

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Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations.

(In thousands, except asset balances and per share data)

This discussion reviews and analyzes the consolidated financial condition, the consolidated results of operations and other key factors that may affect future performance. This discussion should be read in conjunction with the Consolidated Financial Statements, the Notes to the Consolidated Financial Statements and the Annual Report on Form 10-K for the year ended December 31, 2017.

Overview

Consolidated Summary

We are a leading global provider of investment processing, investment management and investment operations platforms. We help corporations, financial institutions, financial advisors and ultra-high-net-worth families create and manage wealth by providing comprehensive, innovative, investment and investment-business platforms. Investment processing fees are earned as monthly fees for contracted services, including computer processing services, software licenses and investment operations services, as well as transaction-based fees for providing securities valuation and trade-execution. Investment operations and investment management fees are earned as a percentage of average assets under management, administration or advised assets. As of March 31, 2018, through our subsidiaries and partnerships in which we have a significant interest, we manage, advise or administer $869.0 billion in hedge, private equity, mutual fund and pooled or separately managed assets, including $334.7 billion in assets under management and $530.1 billion in client assets under administration. Our affiliate, LSV Asset Management (LSV), manages $108.2 billion of assets which are included as assets under management.

Our Condensed Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017 were:

	Three Months Ended March 31,					Percent Change*
	2018			2017
Revenues	$	405,598		$	359,984	13%
Expenses	289,282			266,467		9%
Income from operations	116,316			93,517		24%
Net (loss) gain from investments	(410		)	347		NM
Interest income, net of interest expense	2,245			1,231		82%
Equity in earnings from unconsolidated affiliate	40,607			33,565		21%
Income before income taxes	158,758			128,660		23%
Income taxes	18,920			39,923		(53)%
Net income	139,838			88,737		58%
Diluted earnings per common share	$	0.86		$	0.55	56%

* Variances noted "NM" indicate the percent change is not meaningful.

The following items had a significant impact on our financial results for the three months ended March 31, 2018 and 2017:

• Revenue growth was primarily driven by higher Asset management, administration and distribution fees from market appreciation and positive cash flows from new and existing clients. Our average assets under management, excluding LSV, increased $32.2 billion, or 16 percent, to $233.6 billion in the first three months of 2018 as compared to $201.4 billion during the first three months of 2017. Our average assets under administration increased $56.4 billion, or 12 percent, to $530.3 billion in the first three months of 2018 as compared to $474.0 billion during the first three months of 2017.

• Information processing and software servicing fees in our Private Banks segment increased $6.4 million during the first three months of 2018 primarily due to increased assets from new and existing clients processed on the SEI Wealth Platform.

• Revenues from our acquisition of SEI Archway were $5.5 million during the first three months of 2018. SEI Archway was acquired during the third quarter 2017 and is reported in our Investment Managers segment.

• Our proportionate share in the earnings of LSV increased to $40.6 million in the first three months of 2018 as compared to $33.6 million in the first three months of 2017 primarily due to increased assets under management from LSV's existing clients due to market appreciation.

• Our operating expenses, primarily personnel costs, in our Investment Advisors and Investment Managers segments increased. These expenses primarily consist of operational, technology and marketing costs and are mainly related to servicing existing clients and acquiring new clients. In addition, our Investment Managers segment includes personnel

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costs related to SEI Archway. These operating expenses are included in Compensation, benefits and other personnel costs on the accompanying Consolidated Statements of Operations.

• The direct costs associated with our investment management programs increased in our Private Banks, Investment Advisors and Institutional Investors segments. These costs primarily relate to fees charged by investment advisory firms for day-to-day portfolio management of SEI-sponsored investment products. These costs are included in Sub-advisory, distribution and other asset management costs on the accompanying Consolidated Statements of Operations.

• We capitalized $12.0 million in the first three months of 2018 for the SEI Wealth Platform as compared to $15.2 million in the first three months of 2017. Amortization expense related to the Platform decreased to $9.7 million during the first three months of 2018 as compared to $12.0 million during the first three months of 2017 due to the adjustment to the estimated useful life of the Platform effective in the fourth quarter 2017.

• During the first three months of 2018, we placed into service an application developed for the Investment Managers segment. This new offering includes components that leverage upon the current infrastructure and add significant enhancements designed to aggregate, transact and process data. Amortization expense related to the application was $1.3 million during the first three months of 2018.

• As we continue the development of new elements of the Platform, our expenses related to maintenance and support have increased. These costs are primarily recognized in personnel and consulting costs and are not eligible for capitalization. These increased costs primarily impacted the Private Banks and Investment Advisors business segments.

• Our effective tax rate was 11.9 percent during the first three months of 2018 as compared to 31.0 percent during the first three months of 2017. The decline in our effective tax rate was primarily due to the tax changes enacted in the 2017 Tax Cut and Jobs Act (The Tax Act). In addition, the rate was favorably impacted by increased tax benefits due to a higher volume of stock option exercise activity (See the caption "Income Taxes" later in this discussion for more information).

• We continued our stock repurchase program during 2018 and purchased 1.1 million shares for $82.3 million in the three month period.

Impact of Adopting Revenue Recognition Guidance

On January 1, 2018, we adopted Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification 606 (ASC 606), which provides accounting guidance on the recognition of revenues from contracts with customers and impacts the presentation of certain revenues and expenses in our Consolidated Statements of Operations. ASC 606 is applied prospectively from January 1, 2018 and reported financial results from the prior comparable period have not been revised.

ASC 606 did not change the accounting for the majority of our revenue arrangements and did not have a material impact to our consolidated financial statements. The impact from the adoption of ASC 606 to our financial results during the three months ended March 31, 2018 is primarily related to research services provided to customers in soft-dollar arrangements by SIDCO, our broker-dealer subsidiary. Under the new revenue standard, fees received for research services by SIDCO are recorded net of amounts paid for the soft dollar arrangement. The amounts we paid under these arrangements were previously recorded as an expense. The impact of this change in presentation was a decline in both revenues and expenses of $3.7 million during the three months ended March 31, 2018. There was no impact to our net income as a result of this change (See Note 1 to the Notes to Consolidated Financial Statements).

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Ending Asset Balances

(In millions)

	As of March 31,				Percent Change
	2018		2017
Private Banks:
Equity and fixed-income programs	$	22,917	$	19,034	20%
Collective trust fund programs	4		5		(20)%
Liquidity funds	3,537		3,903		(9)%
Total assets under management	$	26,458	$	22,942	15%
Client assets under administration	22,411		20,760		8%
Total assets	$	48,869	$	43,702	12%
Investment Advisors:
Equity and fixed-income programs	62,176		55,311		12%
Collective trust fund programs	5		5		—%
Liquidity funds	2,399		2,645		(9)%
Total assets under management	$	64,580	$	57,961	11%
Institutional Investors:
Equity and fixed-income programs	85,607		78,954		8%
Collective trust fund programs	72		89		(19)%
Liquidity funds	2,727		2,759		(1)%
Total assets under management	$	88,406	$	81,802	8%
Advised assets	4,185		3,228		30%
Total assets	92,591		85,030		9%
Investment Managers:
Equity and fixed-income programs	97		84		15%
Collective trust fund programs	45,062		40,646		11%
Liquidity funds	732		911		(20)%
Total assets under management	$	45,891	$	41,641	10%
Client assets under administration (A)	507,694		457,356		11%
Total assets	$	553,585	$	498,997	11%
Investments in New Businesses:
Equity and fixed-income programs	1,114		931		20%
Liquidity funds	72		79		(9)%
Total assets under management	$	1,186	$	1,010	17%
Advised assets	49		85		NM
Total assets	1,235		1,095		13%
LSV:
Equity and fixed-income programs (B)	$	108,186	$	91,514	18%
Total:
Equity and fixed-income programs (C)	280,097		245,828		14%
Collective trust fund programs	45,143		40,745		11%
Liquidity funds	9,467		10,297		(8)%
Total assets under management	$	334,707	$	296,870	13%
Advised assets	4,234		3,313		28%
Client assets under administration (D)	530,105		478,116		11%
Total assets under management, advisement and administration	$	869,046	$	778,299	12%

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(A) Client assets under administration in the Investment Managers segment include $42.4 billion of assets that require limited services and therefore are at fee levels below our normal full service assets (as of March 31, 2018).

(B) The ending asset balance for LSV as of March 31, 2017 was revised from $90.6 billion to $91.5 billion to include managed assets in which fees are based on performance only. The ending value of these assets as of March 31, 2018 and 2017 was $2.4 billion and $1.8 billion, respectively.

(C) Equity and fixed-income programs include $5.7 billion of assets invested in asset allocation funds at March 31, 2018.

(D) In addition to the numbers presented, SEI also administers an additional $9.7 billion in Funds of Funds assets (as of March 31, 2018) on which SEI does not earn an administration fee.

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Average Asset Balances

(In millions)

	Three Months Ended March 31,				Percent Change
	2018		2017
Private Banks:
Equity and fixed-income programs	$	23,412	$	18,498	27%
Collective trust fund programs	4		4		—%
Liquidity funds	3,720		4,051		(8)%
Total assets under management	$	27,136	$	22,553	20%
Client assets under administration	23,398		20,223		16%
Total assets	$	50,534	$	42,776	18%
Investment Advisors:
Equity and fixed-income programs	62,650		54,446		15%
Collective trust fund programs	5		5		—%
Liquidity funds	2,290		2,559		(11)%
Total assets under management	$	64,945	$	57,010	14%
Institutional Investors:
Equity and fixed-income programs	87,207		77,852		12%
Collective trust fund programs	77		90		(14)%
Liquidity funds	2,905		2,891		—%
Total assets under management	$	90,189	$	80,833	12%
Advised assets	4,383		3,125		40%
Total assets	94,572		83,958		13%
Investment Managers:
Equity and fixed-income programs	96		75		28%
Collective trust fund programs	49,243		39,081		26%
Liquidity funds	834		860		(3)%
Total assets under management	$	50,173	$	40,016	25%
Client assets under administration	506,951		453,766		12%
Total assets	$	557,124	$	493,782	13%
Investments in New Businesses:
Equity and fixed-income programs	1,105		909		22%
Liquidity funds	70		63		11%
Total assets under management	$	1,175	$	972	21%
Advised assets	50		82		(39)%
Total assets	1,225		1,054		16%
LSV:
Equity and fixed-income programs (A)	$	109,904	$	91,150	21%
Total:
Equity and fixed-income programs	284,374		242,930		17%
Collective trust fund programs	49,329		39,180		26%
Liquidity funds	9,819		10,424		(6)%
Total assets under management	$	343,522	$	292,534	17%
Advised assets	4,433		3,207		38%
Client assets under administration	530,349		473,989		12%
Total assets under management, advisement and administration	$	878,304	$	769,730	14%

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(A) The average asset balance for LSV for the three months ended March 31, 2017 was revised from $90.3 billion to $91.2 billion to include managed assets in which fees are based on performance only. The average value of these assets for the three months ended March 31, 2018 and 2017 was $2.3 billion and $1.7 billion, respectively.

In the preceding tables, assets under management are total assets of our clients or their customers invested in our equity and fixed-income investment programs, collective trust fund programs, and liquidity funds for which we provide asset management services through our subsidiaries and partnerships in which we have a significant interest. Advised assets include assets for which we provide advisory services through a subsidiary to the accounts but do not manage the underlying assets. Assets under administration include total assets of our clients or their customers for which we provide administrative services, including client fund balances for which we provide administration and/or distribution services through our subsidiaries and partnerships in which we have a significant interest. The assets presented in the preceding tables do not include assets processed on the SEI Wealth Platform and are not included in the accompanying Consolidated Balance Sheets because we do not own them.

Business Segments

Revenues, Expenses and Operating Profit (Loss) for our business segments for the three months ended March 31, 2018 compared to the three months ended March 31, 2017 were as follows:

	Three Months Ended March 31,						Percent Change
	2018			2017
Private Banks:
Revenues	$	122,164		$	112,634		8%
Expenses	112,202			108,550			3%
Operating Profit	$	9,962		$	4,084		144%
Operating Margin	8		%	4		%
Investment Advisors:
Revenues	$	99,192		$	88,238		12%
Expenses	52,453			47,539			10%
Operating Profit	$	46,739		$	40,699		15%
Operating Margin	47		%	46		%
Institutional Investors:
Revenues	$	85,491		$	77,004		11%
Expenses	41,249			38,828			6%
Operating Profit	$	44,242		$	38,176		16%
Operating Margin	52		%	50		%
Investment Managers:
Revenues	$	96,855		$	80,487		20%
Expenses	63,338			52,065			22%
Operating Profit	$	33,517		$	28,422		18%
Operating Margin	35		%	35		%
Investments in New Businesses:
Revenues	$	1,896		$	1,621		17%
Expenses	5,098			4,880			4%
Operating Loss	$	(3,202	)	$	(3,259	)	NM

For additional information pertaining to our business segments, see Note 10 to the Consolidated Financial Statements.

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Private Banks

	Three Months Ended March 31,				Percent Change
	2018		2017
Revenues:
Information processing and software servicing fees	$	86,445	$	80,032	8%
Asset management, administration & distribution fees	35,719		32,602		10%
Total revenues	$	122,164	$	112,634	8%

Revenues increased $9.5 million, or eight percent, in the three month period ended March 31, 2018 and were primarily affected by:

• Increased recurring investment processing fees from the growth in new and existing client assets processed on the SEI Wealth Platform;

• Increased investment management fees from existing international clients due to increased net cash flows and higher average assets under management due to market appreciation;

• The positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British pound on our foreign operations; and

• Increased investment processing fees earned on our mutual fund trading solution; partially offset by

• The reclassification of direct expenses related to trade execution fees due to the adoption of ASC 606.

Operating margins increased to eight percent compared to four percent in the three month period. Operating income increased by $5.9 million, or 144 percent, in the three month period and was primarily affected by:

• An increase in revenues;

• Decreased amortization expense related to the SEI Wealth Platform due to the adjustment to the estimated useful life effective in the fourth quarter 2017; and

• The net positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British pound on our foreign operations; partially offset by

• Increased direct expenses associated with increased investment management fees from existing international clients;

• Increased non-capitalized costs, mainly personnel and consulting costs, related to maintenance and support of the SEI Wealth Platform; and

• Increased salary and incentive compensation costs.

Investment Advisors

	Three Months Ended March 31,				Percent Change
	2018		2017
Revenues:
Investment management fees-SEI fund programs	$	73,335	$	66,000	11%
Separately managed account fees	21,848		18,258		20%
Other fees	4,009		3,980		1%
Total revenues	$	99,192	$	88,238	12%

Revenues increased $11.0 million, or 12 percent, in the three month period ended March 31, 2018 and were primarily affected by:

• Increased investment management fees and separately managed account program fees due to higher assets under management caused by market appreciation and positive cash flows from new and existing advisors.

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Operating margin increased to 47 percent compared to 46 percent in the three month period. Operating income increased $6.0 million, or 15 percent, in the three month period and was primarily affected by:

• An increase in revenues; and

• Decreased amortization expense related to the SEI Wealth Platform due to the adjustment to the estimated useful life effective in the fourth quarter 2017; partially offset by

• Increased direct expenses associated with increased assets in our investment management programs;

• Increased personnel costs for marketing to and servicing new advisors; and

• Increased non-capitalized costs, mainly personnel and consulting costs, related to maintenance, support and client migrations to the SEI Wealth Platform.

Institutional Investors

Revenues increased $8.5 million, or 11 percent, in the three month period ended March 31, 2018 and were primarily affected by:

• Asset funding from new sales of our investment management platforms;

• Increased investment management fees from existing clients due to higher assets under management caused by market appreciation; and

• The positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British pound on our foreign operations; partially offset by

• Client losses.

Operating margins increased to 52 percent compared to 50 percent in the three month period. Operating income increased $6.1 million, or 16 percent, in the three month period and was primarily affected by:

• An increase in revenues; and

• The positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British pound on our foreign operations; partially offset by

• Increased direct expenses associated with investment management fees; and

• Increased personnel compensation costs.

Investment Managers

Revenues increased $16.4 million, or 20 percent, in the three month period ended March 31, 2018 and were primarily affected by:

• Higher valuations of existing client assets from improved capital markets:

• Positive cash flows into alternative, traditional and separately managed account offerings from new and existing clients; and

• Added revenues of $5.5 million from the acquisition of Archway during the third quarter 2017; partially offset by

• Client losses and fund closures.

Operating margin remained at 35 percent in the three month period. Operating income increased $5.1 million, or 18 percent, in the three month period and was primarily affected by:

• An increase in revenues; partially offset by

• Increased personnel expenses, technology and other operational costs to service new and existing clients;

• Increased incentive compensation costs;

• Increased personnel and amortization expense related to the Archway acquisition; and

• Increased non-capitalized investment spending, mainly consulting costs.

Other

Corporate overhead expenses

Corporate overhead expenses primarily consist of general and administrative expenses and other costs not directly attributable to a reportable business segment. Corporate overhead expenses were $14.9 million and $14.6 million in the three months ended March 31, 2018 and 2017, respectively.

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Other income and expense

Other income and expense items on the accompanying Consolidated Statements of Operations consists of: 

	Three Months Ended March 31,
	2018			2017
Net (loss) gain from investments	$	(410	)	$	347
Interest and dividend income	2,502			1,343
Interest expense	(257		)	(112		)
Equity in earnings of unconsolidated affiliate	40,607			33,565
Total other income and expense items, net	$	42,442		$	35,143

Equity in earnings of unconsolidated affiliate

Equity in earnings of unconsolidated affiliate reflects our less than 50 percent ownership in LSV. As of March 31, 2018, our total partnership interest in LSV was 38.9 percent. The table below presents the revenues and net income of LSV and our proportionate share in LSV's earnings.

	Three Months Ended March 31,				Percent Change
	2018		2017
Revenues of LSV	$	131,718	$	109,953	20%
Net income of LSV	104,406		86,215		21%
SEI's proportionate share in earnings of LSV	$	40,607	$	33,565	21%

The increase in our earnings from LSV was primarily due to increased assets under management from LSV's existing clients due to market appreciation; however, our earnings were negatively impacted by increased personnel expenses of LSV. Average assets under management by LSV increased $18.8 billion to $109.9 billion during the three months ended March 31, 2018 as compared to $91.2 billion during the three months ended March 31, 2017, an increase of 21 percent.

Income Taxes

Our effective income tax rates for the three months ended March 31, 2018 and 2017 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2018		2017
Statutory rate	21.0	%	35.0	%
State taxes, net of federal tax benefit	2.2		1.5
Foreign tax expense and tax rate differential	(0.2	)	(0.8	)
Tax benefit from stock option exercises	(10.8	)	(4.2	)
Other, net	(0.3	)	(0.5	)
	11.9	%	31.0	%

The decrease in our effective tax rate for the three months ended March 31, 2018 was primarily due to the tax changes enacted in The Tax Act. The Tax Act was enacted in December 2017 and included a permanent reduction in the corporate tax rate from 35.0 percent to 21.0 percent. In addition, our rate was favorably impacted by increased tax benefits due to a higher volume of stock option exercise activity during the first quarter of 2018 as compared to the first quarter of 2017.

Fair Value Measurements

The fair value of our financial assets and liabilities, except for the investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The fair value of all other financial assets are determined using Level 1 or Level 2 inputs and consist mainly of investments in equity or fixed-income mutual funds that are quoted daily and Government National Mortgage Association (GNMA) and other U.S. government agency securities that are single issuer pools that are valued based on current market data of similar assets. We did not have any financial liabilities at March 31, 2018 or

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December 31, 2017 that were required to be measured at fair value on a recurring basis (See Note 5 to the Notes to Consolidated Financial Statements).

Regulatory Matters

Like many firms operating within the financial services industry, we are experiencing a difficult regulatory environment across our markets. Our current scale and reach as a provider to the financial services industry, the introduction and implementation of new platforms for our financial services industry clients, the increased regulatory oversight of the financial services industry generally, new laws and regulations affecting the financial services industry and ever-changing regulatory interpretations of existing laws and regulations, and a greater propensity of regulators to pursue enforcement actions and other sanctions against regulated entities, have made this an increasingly challenging and costly regulatory environment in which to operate.

SEI and some of our regulated subsidiaries have undergone or been scheduled to undergo a range of periodic or thematic reviews, examinations or investigations by numerous regulatory authorities around the world, including the Office of the Comptroller of the Currency, the Securities and Exchange Commission, the Financial Industry Regulatory Authority, Inc., the Financial Conduct Authority of the United Kingdom, the Central Bank of Ireland and others. These regulatory activities typically result in the identification of matters or practices to be addressed by us or our subsidiaries and, in certain circumstances, the regulatory authorities require remediation activities or pursue enforcement proceedings against us or our subsidiaries. As described under the caption “Regulatory Considerations” in our Annual Report on Form 10-K, the range of possible sanctions that are available to regulatory authorities include limitations on our ability to engage in business for specified periods of time, the revocation of registration, censures and fines. The direct and indirect costs of responding to these regulatory activities and of complying with new or modified regulations, as well as the potential financial costs and potential reputational impact against us of any enforcement proceedings that might result, is uncertain but could have a material adverse impact on our operating results or financial position.

Liquidity and Capital Resources 

	Three Months Ended March 31,
	2018			2017
Net cash provided by operating activities	$	104,174		$	73,012
Net cash used in investing activities	(15,376		)	(25,345		)
Net cash used in financing activities	(87,285		)	(84,303		)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,541			2,307
Net increase (decrease) in cash, cash equivalents and restricted cash	4,054			(34,329		)
Cash, cash equivalents and restricted cash, beginning of period	747,752			699,201
Cash, cash equivalents and restricted cash, end of period	$	751,806		$	664,872

Cash requirements and liquidity needs are primarily funded through our cash flow from operations and our capacity for additional borrowing. At March 31, 2018, our unused sources of liquidity consisted of cash and cash equivalents and the amount available under our credit facility. We adopted ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230) (ASU 2016-18) on January 1, 2018 which requires the statement of cash flows to explain the change during the period for the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The prior period was retrospectively adjusted to conform to the current period’s presentation. There was no impact to net cash flows for the three months ended March 31, 2017 as a result of including restricted cash with cash and cash equivalents.

Our credit facility provides for borrowings of up to $300.0 million and is scheduled to expire in June 2021 (See Note 7 to the Consolidated Financial Statements). The availability of the credit facility is subject to compliance with certain covenants set forth in the agreement. The credit facility contains covenants which restrict our ability to engage in mergers, consolidations, asset sales, investments, transactions with affiliates, or to incur liens, as defined in the agreement. In the event of a default under the credit facility, we would also be restricted from paying dividends on, or repurchasing, our common stock. Currently, our ability to borrow from the credit facility is not limited by any covenant of the agreement. In July 2017, we borrowed $40.0 million under the credit facility for the funding of an acquisition. We made a principal payment of $20.0 million during April 2018 to fully repay the outstanding balance of the facility. As of April 19, 2018, the full amount of $300.0 million of the credit facility was available for corporate purposes.

The majority of our excess cash reserves are primarily placed in accounts located in the United States that invest entirely in SEI-sponsored money market mutual funds denominated in the U.S. dollar. We also utilize demand deposit accounts or money market accounts at several well-established financial institutions located in the United States. Accounts used to manage these

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excess cash reserves do not impose any restrictions or limitations that would prevent us from being able to access such cash amounts immediately. As of April 19, 2018, the amount of cash and cash equivalents considered free and immediately accessible for other general corporate purposes was $315.9 million.

Our cash and cash equivalents include accounts managed by our subsidiaries that are used in their operations or to cover specific business and regulatory requirements. The availability of this cash for other purposes beyond the operations of these subsidiaries may be limited. We therefore do not include accounts of our foreign subsidiaries in our calculation of free and immediately accessible cash for other general corporate purposes. With the enactment of the Tax Act, a portion of the undistributed earnings of our foreign subsidiaries are deemed repatriated. Any subsequent transfer of available cash related to the repatriated earnings of our foreign subsidiaries could significantly increase our free and immediately accessible cash.

Cash flows from operations increased $31.2 million in the first three months of 2018 compared to the first three months of 2017 primarily from the increase in our net income and higher distribution payments received from our unconsolidated affiliate, LSV. The increase was partially offset by the negative impact from the change in our working capital accounts.

Net cash used in investing activities includes:

•Purchases, sales and maturities of marketable securities. Our purchases, sales and maturities of marketable securities in the first three months of 2018 and 2017 were as follows:

	Three Months Ended March 31,
	2018			2017
Purchases	$	(15,466	)	$	(20,445	)
Sales and maturities	18,588			15,166
Net investing activities from marketable securities	$	3,122		$	(5,279	)

• The capitalization of costs incurred in developing computer software. We capitalized $12.9 million of software development costs in the first three months of 2018 as compared to $16.9 million in the first three months of 2017. The majority of our software development costs are related to significant enhancements for the expanded functionality of the SEI Wealth Platform.

• Capital expenditures. Our capital expenditures in the first three months of 2018 were $5.6 million as compared to $3.2 million in the first three months of 2017. Our expenditures in 2018 and 2017 primarily include purchased software, equipment for our data center operations and the expansion of our corporate headquarters.

Net cash used in financing activities includes:

• Principal repayments on revolving credit facility. In July 2017, we borrowed $40.0 million for the funding of an acquisition. We made principal payments of $10.0 million each during October 2017 and January 2018 and a final payment of $20.0 million during April 2018 to repay the entire outstanding balance (See Note 7 to the Consolidated Financial Statements).

• The repurchase of our common stock. Our Board of Directors has authorized the repurchase of our common stock through multiple authorizations. Currently, there is no expiration date for our common stock repurchase program. We had total capital outlays of $88.0 million during the first three months of 2018 and $56.6 million during the first three months of 2017 for the repurchase of our common stock.

• Proceeds from the issuance of our common stock. We received $57.9 million in proceeds from the issuance of our common stock during the first three months of 2018 as compared to $16.8 million during the first three months of 2017. The increase in proceeds is primarily attributable to a higher level of stock option exercise activity.

• Dividend payments. Cash dividends paid were $47.2 million in the first three months of 2018 as compared to $44.6 million in the first three months of 2017.

We believe our operating cash flow, available borrowing capacity, and existing cash and cash equivalents should provide adequate funds for ongoing operations; continued investment in new products and equipment; our common stock repurchase program and future dividend payments.

Forward-Looking Information and Risk Factors

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Certain information contained in this discussion is or may be considered forward-looking. Forward-looking statements relate to future operations, strategies, financial results or other developments. Forward-looking statements are based upon estimates and assumptions that involve certain risks and uncertainties, many of which are beyond our control or are subject to change.

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Although we believe our assumptions are reasonable, they could be inaccurate. Our actual future revenues and income could differ materially from our expected results. We have no obligation to publicly update or revise any forward-looking statements.

Among the risks and uncertainties which may affect our future operations, strategies, financial results or other developments are those risks described in our latest Annual Report on Form 10-K in Part I, Item 1A. These risks include the following:

• changes in capital markets that may affect our revenues and earnings;

• product development risk;

• risk of failure by a third-party service provider;

• data and cyber security risks;

• operational risks associated with the processing of investment transactions;

• systems and technology risks;

• pricing pressure from increased competition, disruptive technology and poor investment performance;

• the affect on our earnings and cashflows from the performance of LSV Asset Management;

• third party pricing services for the valuation of securities invested in our investment products;

• the affect of extensive governmental regulation;

• litigation and regulatory examinations and investigations;

• increased costs and regulatory risks from the growth of our business;

• consolidation within our target markets, including consolidations between banks and other financial institutions;

• the exit by the United Kingdom from the European Union;

• third party approval of our investment products with advisors affiliated with independent broker-dealers or other networks;

• financial and non-financial covenants which may restrict our ability to manage liquidity needs;

• changes in, or interpretation of, accounting principles or tax rules and regulations;

• fluctuations in foreign currency exchange rates;

• fluctuations in interest rates affecting the value of our fixed-income investment securities; and

• retention of executive officers and senior management personnel.

Our regulated wholly-owned subsidiaries include SEI Investments Distribution Co., or SIDCO, SEI Investments Management Corporation, or SIMC, SEI Private Trust Company, or SPTC, SEI Trust Company, or STC, and SEI Investments (Europe) Limited, or SIEL, SEI Investments Canada Company, or SEI Canada, SEI Investments Global, Limited, or SIGL, SEI Investments - Global Fund Services, Ltd., or GFSL, and SEI Investments - Depositary and Custodial Services (Ireland) Limited, or D&C. SIDCO is a broker-dealer registered with the SEC under the Securities Exchange Act of 1934 and is a member of the Financial Industry Regulatory Authority, Inc. (FINRA). SIMC is an investment advisor registered with the SEC under the Investment Advisers Act of 1940 and with the Commodity Futures Trading Commission (CFTC) under the Commodity Exchange Act. SPTC is a limited purpose federal thrift chartered and regulated by the Office of the Comptroller of the Currency. STC is a Pennsylvania trust company, regulated by the Pennsylvania Department of Banking and Securities. SIEL is an investment manager and financial institution subject to regulation by the Financial Conduct Authority of the United Kingdom. SEI Canada is regulated by the Ontario Securities Commission and various provincial authorities as an investment fund manager and in various other capacities. SIGL is primarily regulated by the Central Bank of Ireland (CBI) as a management company for Undertakings for Collective Investment in Transferable Securities, or UCITS, and for Alternative Investment Funds, or AIFs. GFSL is regulated by the CBI and authorized to provide administration services for Irish and non-Irish collective investment schemes. D&C is regulated by the CBI and authorized to provide depositary and custodial services. In addition, various SEI subsidiaries are subject to the jurisdiction of regulatory authorities in other foreign countries. The Company has a minority ownership interest in LSV, which is also an investment advisor registered with the SEC.

The Company, its regulated subsidiaries, their regulated services and platforms and their customers are all subject to extensive legislation, regulation and supervision that recently has been subject to, and continues to experience, significant change and increased regulatory activity. These changes and regulatory activities could have a material adverse effect on us and our clients.

The various governmental agencies and self-regulatory authorities that regulate or supervise the Company and its subsidiaries have broad administrative powers. In the event of a failure to comply with laws, regulations and requirements of these agencies and authorities, the possible sanctions that may be imposed include the suspension of individual employees, limitations on our ability to engage in business for specified periods of time, the revocation of applicable registration as a broker-dealer, investment advisor or other regulated entity, and, as the case may be, censures and fines. Additionally, certain securities and banking laws applicable to us and our subsidiaries provide for certain private rights of action that could give rise to civil

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litigation. Any litigation could have significant financial and non-financial consequences including monetary judgments and the requirement to take action or limit activities that could ultimately affect our business.

Governmental scrutiny from regulators, legislative bodies and law enforcement agencies with respect to matters relating to our regulated subsidiaries and their activities, services and platforms, our business practices, our past actions and other matters has increased dramatically in the past several years. Responding to these examinations, investigations, actions and lawsuits, regardless of the ultimate outcome of the proceeding, is time consuming and expensive and can divert the time and effort of our senior management from our business. Penalties and fines sought by regulatory authorities have increased substantially over the last several years, and certain regulators have been more likely in recent years to commence enforcement actions or to advance or support legislation targeted at the financial services industry. We continue to be subject to inquiries from examinations and investigations by supervisory and enforcement divisions of regulatory authorities and expect this to continue in the future. We believe this is also the case with many of our regulated clients. Governmental scrutiny and legal and enforcement proceedings can also have a negative impact on our reputation, our relationship with clients and prospective clients, and on the morale and performance of our employees, which could adversely affect our businesses and results of operations.

We are subject to the USA PATRIOT Act of 2001, which contains anti-money laundering and financial transparency laws and requires implementation of regulations applicable to financial services companies, including standards for verifying client identification and monitoring client transactions and detecting and reporting suspicious activities. Anti-money laundering laws outside the United States contain similar requirements. We offer investment and banking platforms that also are subject to regulation by the federal and state securities and banking authorities, as well as foreign regulatory authorities, where applicable. Existing or future regulations that affect these platforms could lead to a reduction in sales of these platforms or require modifications of these platforms.

Compliance with existing and future regulations and responding to and complying with recent increased regulatory activity affecting broker-dealers, investment advisors, investment companies, financial institutions and their service providers could have a significant impact on us. We periodically undergo regulatory examinations and respond to regulatory inquiries and document requests. In addition, recent and continuing legislative activity in the United States and in other jurisdictions (including the European Union and the United Kingdom) have made and continue to make extensive changes to the laws regulating financial services firms. Recent changes include the effectiveness of the Markets in Financial Instruments Directive (MiFID II) and pending effectiveness of the General Data Protection Regulation in the European Union and the U.S. Department of Labor's Fiduciary Rule. As a result of these examinations, inquiries and requests, as a result of increased civil litigation activity, and as a result of these new laws and regulations, we engage legal counsel, review our compliance procedures, platform and service offerings, and business operations, and make changes as we deem necessary. These additional activities and required changes may result in increased expense or may reduce revenues.

Our bank clients are subject to supervision by federal, state and foreign banking and financial services authorities concerning the manner in which such clients purchase and receive our products and services. Our plan sponsor clients and our subsidiaries providing services to those clients are subject to supervision by the Department of Labor and compliance with employee benefit regulations. Investment advisor and broker-dealer clients are regulated by the SEC, state securities authorities, or FINRA. Existing or future regulations applicable to our clients may affect our clients’ purchase of our products and services.

In addition, see the discussion of governmental regulations in Item 1A “Risk Factors” in our latest Annual Report on Form 10-K for a description of the risks that proposed regulatory changes may present for our business.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk.

Information required by this item is set forth under the captions "Our revenues and earnings are affected by changes in capital markets" and "Changes in interest rates may affect the value of our fixed-income investment securities" in Item 1A "Risk Factors" and under the caption "Sensitivity of our revenues and earnings to capital market fluctuations" in Item 7 "Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Annual Report on Form 10-K for the year ended December 31, 2017. There have been no material changes to this information as it is disclosed in our Annual Report on Form 10-K for 2017.

Item 4.    Controls and Procedures.

(a) Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of the end of the period covered by this report are effective in ensuring that information required to be disclosed by us in reports filed under the

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Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Act is accumulated and communicated to the issuer’s management including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. A controls system, no matter how well designed and operated, cannot provide absolute assurance that the objectives of the controls systems are met, and no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within a company have been detected.

(b) Change in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the quarter ended March 31, 2018 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II.    OTHER INFORMATION

Item 1.    Legal Proceedings.

SEI has been named in seven lawsuits filed in Louisiana courts; four of the cases also name SPTC as a defendant. The underlying allegations in all actions relate to the purported role of SPTC in providing back-office services to Stanford Trust Company. The complaints allege that SEI and SPTC participated in some manner in the sale of “certificates of deposit” issued by Stanford International Bank so as to be a “seller” of the certificates of deposit for purposes of primary liability under the Louisiana Securities Law or so as to be secondarily liable under that statute for sales of certificates of deposit made by Stanford Trust Company. Two of the actions also include claims for violations of the Louisiana Racketeering Act and possibly conspiracy, and a third also asserts claims of negligence, breach of contract, breach of fiduciary duty, violations of the uniform fiduciaries law, negligent misrepresentation, detrimental reliance, violations of the Louisiana Racketeering Act, and conspiracy.

The procedural status of the seven cases varies. The Lillie case, filed originally in the 19th Judicial District Court for the Parish of East Baton Rouge, was brought as a class action and is procedurally the most advanced of the cases. SEI and SPTC filed exceptions, which the Court granted in part, dismissing claims under the Louisiana Unfair Trade Practices Act and permitting the claims under the Louisiana Securities Law to go forward. On March 11, 2013, newly-added insurance carrier defendants removed the case to the United States District Court for the Middle District of Louisiana. On August 7, 2013, the Judicial Panel on Multidistrict Litigation transferred the matter to the Northern District of Texas where MDL 2099, In re: Stanford Entities Securities Litigation (“the Stanford MDL”), is pending. On September 22, 2015, the District Court on the motion of SEI and SPTC dismissed plaintiffs’ claims for primary liability under Section 714(A) of the Louisiana Securities Law, but declined to dismiss plaintiffs’ claims for secondary liability under Section 714(B) of the Louisiana Securities Law based on the allegations pled by plaintiffs. On November 4, 2015, the District Court granted SEI and SPTC's motion to dismiss plaintiffs' claims under Section 712(D) of the Louisiana Securities Law. Consequently, the only claims of plaintiffs still pending before the District Court in Lillie are plaintiffs' claims for secondary liability against SEI and SPTC under Section 714(B) of the Louisiana Securities Law. On May 2, 2016, the District Court certified the class as being "all persons for whom Stanford Trust Company purchased or renewed Stanford Investment Bank Limited certificates of deposit in Louisiana between January 1, 2007 and February 13, 2009". Notice of the pendency of the class action was mailed to potential class members on October 4, 2016.

On December 1, 2016, a group of plaintiffs who opted out of the Lillie class filed a complaint against SEI and SPTC in the United States District Court in the Middle District of Louisiana, alleging claims essentially the same as those in Lillie. In January 2017, the Judicial Panel on Multidistrict Litigation transferred the proceeding to the Northern District of Texas and the Stanford MDL. During February 2017, SEI filed its response to the Complaint and in March 2017 the District Court for the Northern District of Texas approved the stipulated dismissal of all claims in this complaint predicated on Section 712(D) or Section 714(A) of the Louisiana Securities Law.

Another one of the cases, filed in the 23rd Judicial District Court for the Parish of Ascension, also was removed to federal court and transferred by the Judicial Panel on Multidistrict Litigation to the Northern District of Texas and the Stanford MDL. The schedule for responding to that Complaint has not yet been established.

The plaintiffs in two of the cases remaining in the Parish of East Baton Rouge have granted SEI and SPTC indefinite extensions to respond to the petitions.

In the two additional cases, filed in East Baton Rouge and brought by the same counsel who filed the Lillie action, virtually all of the litigation to date has involved motions practice and appellate litigation regarding the existence of federal subjection matter jurisdiction under the federal Securities Litigation Uniform Standards Act (SLUSA). After the matter was removed to the United States District Court for the Northern District of Texas, that court dismissed the action under SLUSA. The Court of Appeals for the Fifth Circuit reversed that order, and the Supreme Court of the United States affirmed the Court of Appeals judgment on February 26, 2014. The matter was remanded to state court and no material activity has taken place since that date.

While the outcome of this litigation remains uncertain, SEI and SPTC believe that they have valid defenses to plaintiffs' claims and intend to defend the lawsuits vigorously. Because of uncertainty in the make-up of the Lillie class, the specific theories of liability that may survive a motion for summary judgment or other dispositive motion, the relative lack of discovery regarding damages, causation, mitigation and other aspects that may ultimately bear upon loss, the Company is not reasonably able to provide an estimate of loss, if any, with respect to the foregoing lawsuits.

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Item 1A.     Risk Factors.

Information regarding risk factors appears in Part I – Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. There have been no material changes in our risk factors from those disclosed in our Annual Report on Form 10-K for 2017.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds.

(e) Our Board of Directors has authorized the repurchase of up to $3.478 billion worth of our common stock through multiple authorizations. Currently, there is no expiration date for our common stock repurchase program.

Information regarding the repurchase of common stock during the three months ended March 31, 2018 is as follows: 

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program
January 2018	—	$	—	—	$	170,638,000
February 2018	602,000	72.20		602,000	127,172,000
March 2018	520,000	74.60		520,000	88,380,000
Total	1,122,000	$	73.31	1,122,000

Item 6.    Exhibits.

The following is a list of exhibits filed as part of the Form 10-Q. 

31.1	Rule 13a-15(e)/15d-15(e) Certification of Chief Executive Officer.
31.2	Rule 13a-15(e)/15d-15(e) Certification of Chief Financial Officer.
32	Section 1350 Certifications.
99.1	Press release dated April 25, 2018 of SEI Investments Company related to the Company's financial and operating results for the first quarter ended March 31, 2018.
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		SEI INVESTMENTS COMPANY
Date:	April 26, 2018	By:	/s/ Dennis J. McGonigle
			Dennis J. McGonigle
			Chief Financial Officer

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EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Alfred P. West, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of SEI Investments Company;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial data and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date: April 26, 2018

/s/ Alfred P. West, Jr.

Alfred P. West, Jr.

Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Dennis J. McGonigle, certify that:

1. I have reviewed this quarterly report on Form 10-Q of SEI Investments Company;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial data and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date: April 26, 2018

/s/ Dennis J. McGonigle

Dennis J. McGonigle

Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

I, Alfred P. West, Jr., Chairman and Chief Executive Officer, and I, Dennis J. McGonigle, Chief Financial Officer, of SEI Investments Company, a Pennsylvania corporation (the “Company”), hereby certify that, to my knowledge:

(1) The Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2018 (the “Form 10-Q”) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

(2) The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	April 26, 2018	Date:	April 26, 2018
/s/ Alfred P. West, Jr.		/s/ Dennis J. McGonigle
Alfred P. West, Jr.		Dennis J. McGonigle
Chairman and Chief Executive Officer		Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-99.1

Exhibit 99.1

Investor Contact:Media Contact:

Lindsey Opsahl                        Dana Grosser

SEI            SEI

+1 610-676-4052                        +1 610-676-2459

lopsahl@seic.comdgrosser@seic.com

Pages:        8

FOR IMMEDIATE RELEASE

SEI Reports First-Quarter2018 Financial Results

OAKS, Pa., April 25, 2018 -- SEI Investments Company (NASDAQ:SEIC) today announced financial results for the first-quarter 2018. Diluted earnings per share were $0.86 in first-quarter 2018 compared to $0.55 in first-quarter 2017. 

Consolidated Overview
(In thousands, except earnings per share)	For the Three Months Ended March 31,
	2018		2017		%
Revenues		$405,598		$359,984	13%
Net income	139,838		88,737		58%
Diluted earnings per share		$0.86		$0.55	56%

“Our results for the quarter reflect the progress we have made across our business lines during the past year, while continuing to make the necessary investments to expand and strengthen the platforms we bring to our target markets,” said Alfred P. West, Jr., SEI Chairman and CEO. “Financially, we also benefited from the change in corporate tax rates that became effective this year.

"The markets we serve continue to face increasingly complex regulations in a highly-competitive environment. Our platforms are built and offered with one key focus, to help our clients achieve lasting success. This will foster growth for the company and increased shareholder value over the long-term."

Summary of First-Quarter Results by Business Segment

(In thousands)	For the Three Months Ended March 31,
	2018			2017			%
Private Banks:
Revenues		$122,164			$112,634		8%
Expenses	112,202			108,550			3%
Operating Profit	9,962			4,084			144%
Operating Margin	8		%	4		%
Investment Advisors:
Revenues	99,192			88,238			12%
Expenses	52,453			47,539			10%
Operating Profit	46,739			40,699			15%
Operating Margin	47		%	46		%
Institutional Investors:
Revenues	85,491			77,004			11%
Expenses	41,249			38,828			6%
Operating Profit	44,242			38,176			16%
Operating Margin	52		%	50		%
Investment Managers:
Revenues	96,855			80,487			20%
Expenses	63,338			52,065			22%
Operating Profit	33,517			28,422			18%
Operating Margin	35		%	35		%
Investments in New Businesses:
Revenues	1,896			1,621			17%
Expenses	5,098			4,880			4%
Operating Loss	(3,202		)	(3,259		)	NM
Totals:
Revenues		$405,598			$359,984		13%
Expenses	274,340			251,862			9%
Corporate overhead expenses	14,942			14,605			2%
Income from operations		$116,316			$93,517		24%

2

First-Quarter Business Highlights:

• Revenue growth in the quarter was primarily driven by higher Asset management, administration, and distribution fees from market appreciation and positive cash flows from new and existing clients.

• Information processing and software servicing fees in our Private Banks segment increased $6.4 million in first-quarter 2018 compared to first-quarter 2017 primarily due to increased assets from new and existing clients processed on the SEI Wealth Platform^SM (the Platform).

• Revenues from the SEI Archway acquisition were $5.5 million during the first-quarter 2018. SEI Archway was acquired during the third-quarter 2017 and is reported in our Investment Managers segment.

• Our average assets under management, excluding LSV, increased $32.2 billion, or 16 percent, to $233.6 billion, as compared to $201.4 billion during the first-quarter 2017 (see attached Average Asset Balances schedules for further details).

• Our average assets under administration increased $56.4 billion, or 12 percent, to $530.3 billion in the first-quarter 2018, as compared to $474.0 billion during the first-quarter 2017 (see attached Average Asset Balances schedules for further details).

• Sales events, net of client losses, during first-quarter 2018 totaled approximately $18.8 millionand are expected to generate net annualized recurring revenues of approximately $11.6 million when contract values are fully realized.

• Our earnings from LSV increased by $7.0 million, or 21 percent, to $40.6 million in first-quarter 2018 as compared to $33.6 million in first-quarter 2017. The increase in earnings was due to an increase in assets under management from market appreciation; however, our earnings were negatively impacted by increased personnel expenses of LSV.

• Our operating expenses, primarily personnel costs, in our Investment Advisors and Investment Managers segments increased. These expenses primarily consist of operational, technology and marketing costs and are mainly related to servicing existing clients and acquiring new clients. In addition, our Investment Managers segment includes personnel costs related to SEI Archway acquired during the third-quarter 2017.

• We capitalized $12.9 million and $16.9 million of software development costs in first-quarter 2018 and 2017, respectively, of which $12.0 million and $15.2 million are related to continued enhancements to the Platform. Our expenses related to maintenance and enhancements not eligible for capitalization have increased. A higher portion of these costs are recognized in personnel and consulting costs. These increased costs primarily impacted the Private Banks and Investment Advisors business segments.

• Amortization expense related to the Platform decreased to $9.7 million during the first-quarter 2018 as compared to $12.0 million during the first-quarter 2017due to an adjustment to the estimated useful life of the Platform effective in the fourth-quarter 2017.

• During the first-quarter 2018, we placed into service an application developed for the Investment Managers segment. This new offering includes components that leverage upon the current infrastructure and add significant enhancements designed to aggregate, transact and process data. Amortization expense related to the application was $1.3 million during first-quarter 2018.

• Our effective tax rate was 11.9 percent in first-quarter 2018 as compared to 31.0 percent in first-quarter 2017. The decline in our tax rate was primarily due to the tax changes enacted in the Tax Cuts and Jobs Act in December 2017 and increased tax benefits due to a higher volume of stock option exercise activity.

• We adopted ASU Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09) on January 1, 2018. With our adoption of ASU 2014-09, fees received for research services provided by our brokerage subsidiary, SIDCO, are now recorded net of amounts paid for the soft dollar arrangement. As a result, our revenues and expenses in first-quarter 2018 were each reduced by $3.7 million with no impact to net income. Refer to our

3

first-quarter 2018 Form 10-Q for information regarding the impact of ASU 2014-09 on our financial statements.

• We repurchased 1.1 million shares of our common stock for $82.3 million during the first-quarter 2018.

Earnings Conference Call

A conference call to review earnings is scheduled for 4:30 p.m. Eastern time on Apr. 25, 2018. Investors may listen to the call at seic.com/ir-events. Investors may also listen to a replay by telephone at (USA) 800-475-6701; (International) 320-365-3844, access code 447804.

About SEI

Now in its 50th year of business, SEI (NASDAQ:SEIC) is a leading global provider of investment processing, investment management, and investment operations solutions that help corporations, financial institutions, financial advisors, and ultra-high-net-worth families create and manage wealth. As of March 31, 2018, through its subsidiaries and partnerships in which the company has a significant interest, SEI manages, advises or administers $869 billion in hedge, private equity, mutual fund and pooled or separately managed assets, including $335 billion in assets under management and $530 billion in client assets under administration. For more information, visit seic.com.

Many of the statements in this release may be considered “forward looking statements” and include discussions about future operations, strategies and financial results. Forward-looking statements are based upon estimates and assumptions that involve risks and uncertainties, many of which are beyond our control or are subject to change. Although we believe our assumptions are reasonable, they could be inaccurate. Our actual future revenues and income could differ materially from our expected results. We have no obligation to publicly update or revise any forward-looking statements.

4

SEI INVESTMENTS COMPANY

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

	For the Three Months Ended March 31,
	2018			2017
Asset management, admin. and distribution fees		$316,209			$279,461
Information processing and software servicing fees	89,389			80,523
Total revenues	405,598			359,984
Subadvisory, distribution and other asset mgmt. costs	45,205			43,152
Software royalties and other information processing costs	8,718			11,971
Compensation, benefits and other personnel	124,277			108,943
Stock-based compensation	5,195			6,180
Consulting, outsourcing and professional fees	48,707			43,149
Data processing and computer related	20,591			18,325
Facilities, supplies and other costs	17,613			15,925
Amortization	11,854			12,022
Depreciation	7,122			6,800
Total expenses	289,282			266,467
Income from operations	116,316			93,517
Net (loss) gain on investments	(410		)	347
Interest and dividend income	2,502			1,343
Interest expense	(257		)	(112		)
Equity in earnings of unconsolidated affiliate	40,607			33,565
Income before income taxes	158,758			128,660
Income taxes	18,920			39,923
Net income		$139,838			$88,737
Basic earnings per common share		$0.89			$0.56
Shares used to calculate basic earnings per share	157,434			159,091
Diluted earnings per common share		$0.86			$0.55
Shares used to calculate diluted earnings per share	163,424			162,742

5

SEI INVESTMENTS COMPANY

CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)

	March 31,			December 31,
	2018			2017
Assets
Current Assets:
Cash and cash equivalents		$748,299			$744,247
Restricted cash	3,507			3,505
Receivables from investment products	54,909			56,666
Receivables, net of allowance for doubtful accounts of $788 and $695	308,270			282,706
Securities owned	21,600			21,526
Other current assets	34,722			31,158
Total Current Assets	1,171,307			1,139,808
Property and Equipment, net of accumulated depreciation of $317,245 and $309,955	145,280			146,428
Capitalized Software, net of accumulated amortization of $361,065 and $350,045	312,272			310,405
Investments Available for Sale	83,089			87,983
Investments in Affiliated Funds, at fair value	5,534			6,034
Investment in Unconsolidated Affiliate	54,482			59,492
Goodwill	52,990			52,990
Intangible Assets, net of accumulated amortization of $2,328 and $1,552	27,802			28,578
Deferred Contract Costs	19,875			—
Deferred Income Taxes	2,740			2,767
Other Assets, net	18,334			18,884
Total Assets		$1,893,705			$1,853,369
Liabilities and Equity
Current Liabilities:
Accounts payable		$8,463			$5,268
Accrued liabilities	168,618			265,058
Deferred revenue	4,998			4,723
Total Current Liabilities	182,079			275,049
Borrowings Under Revolving Credit Facility	20,000			30,000
Long-term Taxes Payable	10,629			10,629
Deferred Income Taxes	54,384			48,472
Other Long-term Liabilities	12,959			12,380
Total Liabilities	280,051			376,530
Shareholders' Equity:
Common stock, $.01 par value, 750,000 shares authorized; 157,990 and 157,069 shares issued and outstanding	1,580			1,571
Capital in excess of par value	1,085,312			1,027,709
Retained earnings	544,923			467,467
Accumulated other comprehensive loss, net	(18,161		)	(19,908		)
Total Shareholders' Equity	1,613,654			1,476,839
Total Liabilities and Shareholders' Equity		$1,893,705			$1,853,369

6

ENDING ASSET BALANCES

(In millions) (Unaudited)

	Mar. 31,		Jun. 30,		Sept. 30,		Dec 31,		Mar. 31,
	2017		2017		2017		2017		2018
Private Banks:
Equity and fixed-income programs		$19,034		$20,185		$21,196		$22,764		$22,917
Collective trust fund programs	5		4		4		4		4
Liquidity funds	3,903		3,589		3,345		3,864		3,537
Total assets under management		$22,942		$23,778		$24,545		$26,632		$26,458
Client assets under administration	20,760		20,951		22,107		22,980		22,411
Total assets		$43,702		$44,729		$46,652		$49,612		$48,869
Investment Advisors:
Equity and fixed-income programs		$55,311		$57,358		$59,455		$61,908		$62,176
Collective trust fund programs	5		5		5		5		5
Liquidity funds	2,645		2,451		2,327		2,414		2,399
Total assets under management		$57,961		$59,814		$61,787		$64,327		$64,580
Institutional Investors:
Equity and fixed-income programs		$78,954		$81,723		$85,763		$87,587		$85,607
Collective trust fund programs	89		80		82		78		72
Liquidity funds	2,759		2,468		3,699		2,937		2,727
Total assets under management		$81,802		$84,271		$89,544		$90,602		$88,406
Advised assets	3,228		4,255		3,626		3,942		4,185
Total assets		$85,030		$88,526		$93,170		$94,544		$92,591
Investment Managers:
Equity and fixed-income programs		$84		$92		$93		$96		$97
Collective trust fund programs	40,646		42,662		46,087		49,340		45,062
Liquidity funds	911		999		799		743		732
Total assets under management		$41,641		$43,753		$46,979		$50,179		$45,891
Client assets under administration (A)	457,356		476,543		493,538		495,447		507,694
Total assets		$498,997		$520,296		$540,517		$545,626		$553,585
Investments in New Businesses:
Equity and fixed-income programs		$931		$997		$1,052		$1,104		$1,114
Liquidity funds	79		46		71		53		72
Total assets under management		$1,010		$1,043		$1,123		$1,157		$1,186
Advised assets	85		69		54		49		49
Total assets		$1,095		$1,112		$1,177		$1,206		$1,235
LSV Asset Management:
Equity and fixed-income programs (B)		$91,514		$95,700		$102,901		$107,690		$108,186
Total:
Equity and fixed-income programs (C)		$245,828		$256,055		$270,460		$281,149		$280,097
Collective trust fund programs	40,745		42,751		46,178		49,427		45,143
Liquidity funds	10,297		9,553		10,241		10,011		9,467
Total assets under management		$296,870		$308,359		$326,879		$340,587		$334,707
Advised assets	3,313		4,324		3,680		3,991		4,234
Client assets under administration (D)	478,116		497,494		515,645		518,427		530,105
Total assets		$778,299		$810,177		$846,204		$863,005		$869,046

(A) Client assets under administration in the Investment Managers segment include $42.4 billion of assets that require limited services and therefore are at fee levels below our normal full service assets (as of March 31, 2018).

(B) Equity and fixed-income programs include assets managed by LSV in which fees are based on performance only. A portion of these assets were not included in prior period reported assets. The ending value of these assets for each period are as follows: $1.8 billion in March 2017, $2.0 billion in June 2017, $2.3 billion in September 2017, $2.4 billion in December 2017 and $2.4 billion in March 2018.

(C) Equity and fixed-income programs include $5.7 billion of assets invested in various asset allocation funds at March 31, 2018.

(D) In addition to the numbers presented, SEI also administers an additional $9.7 billion in Funds of Funds assets (as of

March 31, 2018) on which SEI does not earn an administration fee.

7

AVERAGE ASSET BALANCES

(In millions) (Unaudited)

	1st Qtr.		2nd Qtr.		3rd Qtr.		4th Qtr.		1st Qtr.
	2017		2017		2017		2017		2018
Private Banks:
Equity and fixed-income programs		$18,498		$19,610		$20,699		$21,748		$23,412
Collective trust fund programs	4		5		4		4		4
Liquidity funds	4,051		3,677		3,555		3,584		3,720
Total assets under management		$22,553		$23,292		$24,258		$25,336		$27,136
Client assets under administration	20,223		21,166		21,441		22,759		23,398
Total assets		$42,776		$44,458		$45,699		$48,095		$50,534
Investment Advisors:
Equity and fixed-income programs		$54,446		$56,319		$58,406		$60,730		$62,650
Collective trust fund programs	5		5		5		5		5
Liquidity funds	2,559		2,390		2,335		2,235		2,290
Total assets under management		$57,010		$58,714		$60,746		$62,970		$64,945
Institutional Investors:
Equity and fixed-income programs		$77,852		$80,561		$84,520		$86,573		$87,207
Collective trust fund programs	90		85		80		80		77
Liquidity funds	2,891		2,861		3,177		3,052		2,905
Total assets under management		$80,833		$83,507		$87,777		$89,705		$90,189
Advised assets	3,125		3,687		3,552		3,796		4,383
Total assets		$83,958		$87,194		$91,329		$93,501		$94,572
Investment Managers:
Equity and fixed-income programs		$75		$84		$92		$99		$96
Collective trust fund programs	39,081		41,615		44,824		47,772		49,243
Liquidity funds	860		937		952		843		834
Total assets under management		$40,016		$42,636		$45,868		$48,714		$50,173
Client assets under administration	453,766		470,701		486,158		494,201		506,951
Total assets		$493,782		$513,337		$532,026		$542,915		$557,124
Investments in New Businesses:
Equity and fixed-income programs		$909		$954		$1,016		$1,079		$1,105
Liquidity funds	63		64		55		54		70
Total assets under management		$972		$1,018		$1,071		$1,133		$1,175
Advised assets	82		73		73		50		50
Total assets		$1,054		$1,091		$1,144		$1,183		$1,225
LSV Asset Management:
Equity and fixed-income programs (A)		$91,150		$94,010		$100,244		$106,112		$109,904
Total:
Equity and fixed-income programs		$242,930		$251,538		$264,977		$276,341		$284,374
Collective trust fund programs	39,180		41,710		44,913		47,861		49,329
Liquidity funds	10,424		9,929		10,074		9,768		9,819
Total assets under management		$292,534		$303,177		$319,964		$333,970		$343,522
Advised assets	3,207		3,760		3,625		3,846		4,433
Client assets under administration	473,989		491,867		507,599		516,960		530,349
Total assets		$769,730		$798,804		$831,188		$854,776		$878,304

(A) Equity and fixed-income programs include assets managed by LSV in which fees are based on performance only. A portion of these assets were not included in prior period reported assets. The average of these assets for each period are as follows: $1.7 billion in Q1 2017, $2.0 billion in Q2 2017, $2.2 billion in Q3 2017, $2.4 billion in Q4 2017 and $2.3 billion in Q1 2018.

8

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 19, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	SEI INVESTMENTS COMPANY
Entity Central Index Key	0000350894
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Trading Symbol	SEIC
Amendment Flag	false
Entity Common Stock, Shares Outstanding		158,084,303

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 748,299	$ 744,247
Restricted cash	3,507	3,505
Receivables from investment products	54,909	56,666
Receivables, net of allowance for doubtful accounts of $788 and $695	308,270	282,706
Securities owned	21,600	21,526
Other current assets	34,722	31,158
Total Current Assets	1,171,307	1,139,808
Property and Equipment, net of accumulated depreciation of $317,245 and $309,955	145,280	146,428
Capitalized Software, net of accumulated amortization of $361,065 and $350,045	312,272	310,405
Investments Available for Sale	83,089	87,983
Investments in Affiliated Funds, at fair value	5,534	6,034
Investment in Unconsolidated Affiliate	54,482	59,492
Goodwill	52,990	52,990
Intangible Assets, net of accumulated amortization of $2,328 and $1,552	27,802	28,578
Deferred Contract Costs	19,875	0
Deferred Income Taxes	2,740	2,767
Other Assets, net	18,334	18,884
Total Assets	1,893,705	1,853,369
Current Liabilities:
Accounts payable	8,463	5,268
Accrued liabilities	168,618	265,058
Deferred revenue	4,998	4,723
Total Current Liabilities	182,079	275,049
Borrowings Under Revolving Credit Facility	20,000	30,000
Long-term Income Taxes Payable	10,629	10,629
Deferred Income Taxes	54,384	48,472
Other Long-term Liabilities	12,959	12,380
Total Liabilities	280,051	376,530
Commitments and Contingencies
Shareholders' Equity:
Common stock, $.01 par value, 750,000 shares authorized; 157,990 and 157,069 shares issued and outstanding	1,580	1,571
Capital in excess of par value	1,085,312	1,027,709
Retained earnings	544,923	467,467
Accumulated other comprehensive loss, net	(18,161)	(19,908)
Total Shareholders' Equity	1,613,654	1,476,839
Total Liabilities and Shareholders' Equity	$ 1,893,705	$ 1,853,369

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Receivables, allowance for doubtful accounts	$ 788	$ 695
Property and Equipment, accumulated depreciation	317,245	309,955
Capitalized software, accumulated amortization	361,065	350,045
Intangible assets, accumulated amortization	$ 2,328	$ 1,552
Stockholders' Equity:
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	157,990,000	157,069,000
Common stock, shares outstanding	157,990,000	157,069,000

XML

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Asset management, administration and distribution fees	$ 316,209	$ 279,461
Information processing and software servicing fees	89,389	80,523
Total revenues	405,598	359,984
Expenses:
Subadvisory, distribution and other asset management costs	45,205	43,152
Software royalties and other information processing costs	8,718	11,971
Compensation, benefits and other personnel	124,277	108,943
Stock-based compensation	5,195	6,180
Consulting, outsourcing and professional fees	48,707	43,149
Data processing and computer related	20,591	18,325
Facilities, supplies and other costs	17,613	15,925
Amortization	11,854	12,022
Depreciation	7,122	6,800
Total expenses	289,282	266,467
Income from operations	116,316	93,517
Net (loss) gain from investments	(410)	347
Interest and dividend income	2,502	1,343
Interest expense	(257)	(112)
Equity in earnings of unconsolidated affiliate	40,607	33,565
Income before income taxes	158,758	128,660
Income taxes	18,920	39,923
Net income	$ 139,838	$ 88,737
Basic earnings per common share (in USD per share)	$ 0.89	$ 0.56
Shares used to compute basic earnings per share	157,434	159,091
Diluted earnings per common share (in USD per share)	$ 0.86	$ 0.55
Shares used to compute diluted earnings per share	163,424	162,742

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 139,838	$ 88,737
Other comprehensive gain (loss), net of tax:
Foreign currency translation adjustments	3,377	2,488
Unrealized loss on investments:
Unrealized losses during the period, net of income taxes of $424 and $19	(1,357)	(24)
Less: reclassification adjustment for gains realized in net income, net of income taxes of $(15) and $10	(273)	(22)
Unrealized loss on investments:	(1,630)	(46)
Total other comprehensive gain, net of tax	1,747	2,442
Comprehensive income	$ 141,585	$ 91,179

XML

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) during the period, income tax (expense) benefit	$ 424	$ 19
Reclassification adjustment for losses realized in net income, income tax benefit	$ (15)	$ 10

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 139,838	$ 88,737
Adjustments to reconcile net income to net cash provided by operating activities (See Note 1)	(35,664)	(15,725)
Net cash provided by operating activities	104,174	73,012
Cash flows from investing activities:
Additions to property and equipment	(5,611)	(3,205)
Additions to capitalized software	(12,887)	(16,861)
Purchases of marketable securities	(15,466)	(20,445)
Prepayments and maturities of marketable securities	18,588	15,166
Net cash used in investing activities	(15,376)	(25,345)
Cash flows from financing activities:
Repayments under revolving credit facility	(10,000)	0
Purchase and retirement of common stock	(87,995)	(56,553)
Proceeds from issuance of common stock	57,889	16,847
Payment of dividends	(47,179)	(44,597)
Net cash used in financing activities	(87,285)	(84,303)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,541	2,307
Net increase (decrease) in cash, cash equivalents and restricted cash	4,054	(34,329)
Cash, cash equivalents and restricted cash, beginning of period	747,752	699,201
Cash, cash equivalents and restricted cash, end of period	$ 751,806	$ 664,872

XML

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Nature of Operations

SEI Investments Company (the Company), a Pennsylvania corporation, provides investment processing, investment management, and investment operations platforms to financial institutions, financial advisors, institutional investors, investment managers and ultra-high-net-worth families in the United States, Canada, the United Kingdom, continental Europe and various other locations throughout the world.

Investment processing platforms consist of application and business process outsourcing services, professional services and transaction-based services. Revenues from investment processing platforms are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment management programs consist of mutual funds, alternative investments and separate accounts. These include a series of money market, equity, fixed-income and alternative investment portfolios, primarily in the form of registered investment companies. The Company serves as the administrator and investment advisor for many of these products. Revenues from investment management programs are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment operations platforms offer investment managers support for traditional investment products such as mutual funds, collective investment trusts, exchange-traded funds, and institutional and separate accounts, by providing outsourcing services including fund and investment accounting, administration, reconciliation, investor servicing and client reporting. These platforms also provide support to managers focused on alternative investments who manage hedge funds, funds of hedge funds, private equity funds and real estate funds, across registered, partnership and separate account structures domiciled in the United States and overseas. Revenues from investment operations platforms are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Basis of Presentation

The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Certain financial information and accompanying note disclosure normally included in the Company’s Annual Report on Form 10-K have been condensed or omitted. The interim financial information is unaudited but reflects all adjustments (consisting of only normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of financial position of the Company as of March 31, 2018, the results of operations for the three months ended March 31, 2018 and 2017, and cash flows for the three-month periods ended March 31, 2018 and 2017. These interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

The Company adopted the requirements of Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification (ASC) 606 (ASC 606)) using the modified retrospective method during the three months ended March 31, 2018. As a result of the adoption of ASC 606, the Company recorded a cumulative effect adjustment of $14,402 to retained earnings as of January 1, 2018. Prior period information has not been restated (see following caption "Revenue Recognition"). The Company also adopted ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (see Note 6) and ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230) (see following caption "Statements of Cash Flows"). All amounts and disclosures set forth in this Form 10-Q have been updated to comply with the new standards.

Revenue Recognition

Revenue is recognized when the transfer of control of promised goods or services under the terms of a contract with customers are satisfied in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those promised goods or services. Certain portions of the Company’s revenues involve a third party in providing goods or services to its customers. In such circumstances, the Company must determine whether the nature of its promise to the customer is to provide the underlying goods or services (the Company is the principal in the transaction and reports the transaction gross) or to arrange for a third party to provide the underlying goods or services (the entity is the agent in the transaction and reports the transaction net).

ASC 606 did not change the accounting for the majority of the Company’s revenue arrangements and did not have a material impact to the Company’s consolidated financial statements. The following is a summary of the impact from the adoption of ASC 606:

•The majority of the Company’s services are bundled together, and provided and completed for the client on a monthly basis. For these revenue arrangements, the Company will continue to recognize revenue on a monthly basis as the client consumes the benefits continuously over time. The timing and recognition of revenues from these arrangements did not change.

•Contracts with new clients or with existing clients for new services generally include implementation fees. These fees are recognized in Information processing and software servicing fees when in connection with investment processing platforms and are recognized in Asset management, administration and distribution fees when in connection with investment operations platforms. The Company concluded that most of the current arrangements for implementation services are a distinct and separate performance obligation from the monthly recurring services. The timing and recognition of fees for most of these arrangements have not changed. However, each new revenue arrangement for implementation fees is analyzed to determine whether or not it is a distinct performance obligation. Implementation fees determined not to be a distinct performance obligation would be required to be recognized over the expected life of the client relationship along with the costs relating directly to satisfying such performance obligation. The Company will evaluate each contract in accordance with the requirements of ASC 606.

•Research services provided by SIDCO, the Company’s broker-dealer subsidiary, to customers in soft-dollar arrangements were determined to be a separate performance obligation. Research services provided by a broker-dealer may be internally generated or provided by a third party and paid directly by the broker-dealer on the customer’s behalf. It was determined that SIDCO is considered an agent since it does not control the research services before they are transferred to the customer. Therefore, fees received for research services should be recorded in revenues net of amounts paid for the soft dollar arrangement. These amounts paid by the Company were previously recorded gross as an expense and, beginning January 1, 2018, are recorded net of any revenue recognized. The amounts related to soft dollar arrangements during the three months ended March 31, 2018 and 2017 were $3,730 and $4,073, respectively.

•Incremental contract acquisition costs related to information processing contracts in the Private Banks segment and investment operations contracts in the Investment Managers segment will be deferred and recognized over the expected client life. These costs primarily consist of sales compensation payments to the Company's sales personnel. As a result, incremental contract acquisition costs are capitalized and subsequently amortized. The Company recorded a cumulative effect adjustment to retained earnings associated with the capitalization of contract costs. For the Company's other sales compensation payments, the Company either applies the practical expedient permitting the expensing of costs to obtain a contract when the expected amortization period is one year or less or there are no contract acquisition costs required to be deferred under the requirements of ASC 606.

Cash and Cash Equivalents

Cash and cash equivalents includes $341,413 and $401,292 at March 31, 2018 and December 31, 2017, respectively, primarily invested in SEI-sponsored open-ended money market mutual funds. The SEI-sponsored mutual funds are Level 1 assets.

Restricted Cash

Restricted cash includes $3,000 at March 31, 2018 and December 31, 2017 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $507 and $505 at March 31, 2018 and December 31, 2017, respectively, segregated in special reserve accounts for the benefit of customers of the Company’s broker-dealer subsidiary, SEI Investments Distribution Co. (SIDCO), in accordance with certain rules established by the Securities and Exchange Commission (SEC) for broker-dealers.

Capitalized Software

The Company capitalized $12,887 and $16,861 of software development costs during the three months ended March 31, 2018 and 2017, respectively. The Company's software development costs primarily relate to the continued development of the SEI Wealth Platform^SM (the Platform). The Company capitalized $12,042 and $15,178 of software development costs for significant enhancements to the Platform during the three months ended March 31, 2018 and 2017, respectively. As of March 31, 2018, the net book value of the Platform was $287,530. The net book value includes $33,237 of capitalized software development costs in-progress associated with future releases. The Platform has a weighted average remaining life of 8.4 years. Amortization expense for the Platform was $9,719 and $11,972 during the three months ended March 31, 2018 and 2017, respectively.

The Company also capitalized $845 and $1,683 of software development costs during the three months ended March 31, 2018 and 2017, respectively, related to an application for the Investment Managers segment. The application was placed into service during the first quarter 2018 with an estimated useful life of 5 years. The net book value of the application at March 31, 2018 was $24,742. Amortization expense for the application was $1,301 during the three months ended March 31, 2018.

Earnings per Share

The calculations of basic and diluted earnings per share for the three months ended March 31, 2018 and 2017 are:

	Three Months Ended March 31,
	2018		2017
Net income	$	139,838	$	88,737
Shares used to compute basic earnings per common share	157,434,000		159,091,000
Dilutive effect of stock options	5,990,000		3,651,000
Shares used to compute diluted earnings per common share	163,424,000		162,742,000
Basic earnings per common share	$	0.89	$	0.56
Diluted earnings per common share	$	0.86	$	0.55

During the three months ended March 31, 2018 and 2017, employee stock options to purchase 6,054,000 and 11,279,000 shares of common stock with an average exercise price of $52.73 and $37.70, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three month periods were not included in the computation of diluted earnings per common share because either the performance conditions have not been satisfied or would have been satisfied if the reporting date was the end of the contingency period or the option’s exercise price was greater than the average market price of the Company’s common stock and the effect on diluted earnings per common share would have been anti-dilutive.

Reclassifications

Certain prior year amounts have been reclassified to conform to current year presentation.

New Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases (ASU 2016-02) requiring lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The updated standard is effective for the Company beginning in the first quarter of 2019. Early adoption is permitted. While the Company is not yet in a position to assess the full impact of the adoption of ASU 2016-02 on its consolidated financial statements and related disclosures, the Company is currently in the process of cataloging existing lease agreements and evaluating the transition method to be elected.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) which requires that expected credit losses relating to financial assets measured on an amortized cost basis and available-for-sale debt securities be recorded through an allowance for credit losses. ASU 2016-13 limits the amount of credit losses to be recognized for available-for-sale debt securities to the amount by which carrying value exceeds fair value and also requires the reversal of previously recognized credit losses if fair value increases. ASU 2016-13 becomes effective for the Company during the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures.

In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04). The objective of ASU 2017-04 is to simplify the subsequent measurement of goodwill by entities performing their annual goodwill impairment tests by comparing the fair value of a reporting unit, including income tax effects from any tax-deductible goodwill, with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds fair value. ASU 2017-04 is effective for the Company beginning in the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2017-04 on its consolidated financial statements and related disclosures.

Statements of Cash Flows

For purposes of the Consolidated Statements of Cash Flows, the Company considers investment instruments purchased with an original maturity of three months or less to be cash equivalents.

The Company adopted ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230) (ASU 2016-18) on January 1, 2018 which requires that a statement of cash flows explain the change during the period for the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The prior period was retrospectively adjusted to conform to the current period’s presentation. There was no impact to net cash flows for the three months ended March 31, 2017 as a result of including restricted cash with cash and cash equivalents when reconciling the

beginning-of-period and end-of-period total amounts presented on the accompanying Consolidated Condensed Statement of Cash Flows in accordance with ASU 2016-18.

The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the three months ended March 31:

	2018			2017
Net income	$	139,838		$	88,737
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,122			6,800
Amortization	11,854			12,022
Equity in earnings of unconsolidated affiliate	(40,607		)	(33,565		)
Distributions received from unconsolidated affiliate	45,617			35,265
Stock-based compensation	5,195			6,180
Provision for losses on receivables	93			(5		)
Deferred income tax expense	2,083			877
Net gain from investments	410			(347		)
Change in other long-term liabilities	579			965
Change in other assets	290			(849		)
Other	(784		)	56
Change in current assets and liabilities
Decrease (increase) in
Receivables from investment products	1,757			10,308
Receivables	(25,657		)	(24,243		)
Other current assets	(3,564		)	(2,298		)
Increase (decrease) in
Accounts payable	3,195			1,406
Accrued liabilities	(43,522		)	(27,754		)
Deferred revenue	275			(543		)
Total adjustments	(35,664		)	(15,725		)
Net cash provided by operating activities	$	104,174		$	73,012

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Investment In Unconsolidated Affiliate

3 Months Ended

Mar. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

Investment In Unconsolidated Affiliate

Investment in Unconsolidated Affiliate

LSV Asset Management

The Company has an investment in LSV Asset Management (LSV), a registered investment advisor that provides investment advisory services primarily to institutions, including pension plans and investment companies. LSV is currently an investment sub-advisor for a limited number of SEI-sponsored investment products. The Company accounts for its interest in LSV using the equity method because of its less than 50 percent ownership. The Company’s interest in the net assets of LSV is reflected in Investment in unconsolidated affiliate on the accompanying Consolidated Balance Sheets and its interest in the earnings of LSV is reflected in Equity in earnings of unconsolidated affiliate on the accompanying Consolidated Statements of Operations.

At March 31, 2018, the Company’s total investment in LSV was $54,482. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $45,617 and $35,265 in the three months ended March 31, 2018 and 2017, respectively. As such, the Company considers these distribution payments as returns on investment rather than returns of the Company's original investment in LSV and has therefore classified the associated cash inflows as an operating activity on the Consolidated Statements of Cash Flows.

The Company’s proportionate share in the earnings of LSV was $40,607 and $33,565 during the three months ended March 31, 2018 and 2017, respectively.

These tables contain condensed financial information of LSV: 

Condensed Statement of Operations	Three Months Ended March 31,
	2018		2017
Revenues	$	131,718	$	109,953
Net income	104,406		86,215

Condensed Balance Sheets	March 31, 2018		December 31, 2017
Current assets	$	143,922	$	155,239
Non-current assets	1,444		1,407
Total assets	$	145,366	$	156,646
Current liabilities	$	47,641	$	46,486
Partners’ capital	97,725		110,160
Total liabilities and partners’ capital	$	145,366	$	156,646

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Variable Interest Entities - Investment Products

3 Months Ended

Mar. 31, 2018

Financial Support for Nonconsolidated Legal Entity [Abstract]

Variable Interest Entities - Investment Products

Variable Interest Entities – Investment Products

The Company or its affiliates have created numerous investment products for its clients in various types of legal entity structures. The Company serves as the Manager, Administrator and Distributor for these investment products and may also serve as the Trustee for some of the investment products. The Company receives asset management, distribution, administration and custodial fees for these services. Clients are the equity investors and participate in proportion to their ownership percentage in the net income or loss and net capital gains or losses of the products, and, on liquidation, will participate in proportion to their ownership percentage in the remaining net assets of the products after satisfaction of outstanding liabilities.

The Company has concluded that it is not the primary beneficiary of the entities and; therefore, is not required to consolidate any of the pooled investment vehicles for which it receives asset management, distribution, administration and custodial fees under the VIE model. The entities either do not meet the definition of a VIE or the Company does not hold a variable interest in the entities. The entities either qualify for the money market scope exception, or are entities in which the Company’s asset management, distribution, administration and custodial fees are commensurate with the services provided and include fair terms and conditions, or are entities that are limited partnerships which have substantive kick-out rights. The Company acts as a fiduciary and does not hold any other interests other than insignificant seed money investments in the pooled investment vehicles. For this reason, the Company also concluded that it is not required to consolidate the pooled investment vehicles under the voting interest entity (VOE) model.

The Company is a party to expense limitation agreements with certain SEI-sponsored money market funds subject to Rule 2a-7 of the Investment Company Act of 1940 which establish a maximum level of ordinary operating expenses incurred by the fund in any fiscal year including, but not limited to, fees of the administrator or its affiliates. Under the terms of these agreements, the Company waived $6,654 and $7,072 in fees during the three months ended March 31, 2018 and 2017, respectively.

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Composition of Certain Financial Statement Captions

3 Months Ended

Mar. 31, 2018

Items Included in Consolidated Statement of Financial Condition [Abstract]

Composition of Certain Financial Statement Captions

Composition of Certain Financial Statement Captions

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2018			December 31, 2017
Trade receivables	$	72,764		$	76,760
Fees earned, not billed	220,414			194,331
Other receivables	15,880			12,310
	309,058			283,401
Less: Allowance for doubtful accounts	(788		)	(695		)
	$	308,270		$	282,706

Fees earned, not billed represents receivables earned but unbilled and results from timing differences between services provided and contractual billing schedules. These billing schedules generally provide for fees to be billed on a quarterly basis.

In addition, certain fees earned from investment operations services are calculated based on assets under administration that have a prolonged valuation process which delays billings to clients.

Receivables from investment products on the accompanying Consolidated Balance Sheets primarily represent fees receivable for distribution, investment advisory, and administration services to various regulated investment companies and other investment products sponsored by SEI.

Property and Equipment

Property and Equipment on the accompanying Consolidated Balance Sheets consists of:

	March 31, 2018			December 31, 2017
Buildings	$	154,007		$	153,961
Equipment	118,823			115,546
Land	10,557			10,030
Purchased software	136,226			134,610
Furniture and fixtures	18,320			18,114
Leasehold improvements	18,851			18,017
Construction in progress	5,741			6,105
	462,525			456,383
Less: Accumulated depreciation	(317,245		)	(309,955		)
Property and Equipment, net	$	145,280		$	146,428

The Company recognized $7,122 and $6,800 in depreciation expense related to property and equipment for the three months ended March 31, 2018 and 2017, respectively.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2018		December 31, 2017
Accrued employee compensation	$	28,714	$	88,960
Accrued consulting, outsourcing and professional fees	35,682		29,658
Accrued sub-advisory, distribution and other asset management fees	39,680		42,365
Accrued dividend payable	—		47,179
Accrued income taxes	19,282		5,583
Other accrued liabilities	45,260		51,313
Total accrued liabilities	$	168,618	$	265,058

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Fair Value Measurements

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The fair value of the Company’s financial assets and liabilities, except for the Company's investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the Company’s Level 1 financial assets consist mainly of investments in open-ended mutual funds that are quoted daily. Level 2 financial assets consist of Government National Mortgage Association (GNMA) mortgage-backed securities held by the Company's wholly-owned limited purpose federal thrift subsidiary, SEI Private Trust Company (SPTC), Federal Home Loan Bank (FHLB) and other U.S. government agency short-term notes held by SIDCO. The financial assets held by SIDCO were purchased as part of a cash management program requiring only short term, top-tier investment grade government and corporate securities. The financial assets held by SPTC are debt securities issued by GNMA and are backed by the full faith and credit of the U.S. government. These securities were purchased for the sole purpose of satisfying applicable regulatory requirements and have maturity dates which range from 2021 to 2041.

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

The valuation of the Company's Level 2 financial assets held by SIDCO and SPTC are based upon securities pricing policies and procedures utilized by third-party pricing vendors.

The pricing policies and procedures applied for our Level 1 and Level 2 financial assets during the three months ended March 31, 2018 were consistent with those as described in our Annual Report on Form 10-K at December 31, 2017. The Company had no Level 3 financial assets or liabilities at March 31, 2018 or December 31, 2017 that were required to be measured at fair value on a recurring basis. There were no transfers of financial assets between levels within the fair value hierarchy during the three months ended March 31, 2018.

The fair value of certain financial assets of the Company was determined using the following inputs:

			Fair Value Measurements at the End of the Reporting Period Using
Assets	March 31, 2018		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity available-for-sale securities	$	11,316	$	11,316	$	—
Fixed-income available-for-sale securities	71,773		—		71,773
Fixed-income securities owned	21,600		—		21,600
Investment funds sponsored by LSV (1)	5,534
	$	110,223	$	11,316	$	93,373

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2017		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity available-for-sale securities	$	11,250	$	11,250	$	—
Fixed-income available-for-sale securities	76,733		—		76,733
Fixed-income securities owned	21,526		—		21,526
Investment funds sponsored by LSV (1)	6,034
	$	115,543	$	11,250	$	98,259

(1) The fair value amounts presented in the tables above are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the accompanying Consolidated Balance Sheets (See Note 6).

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Marketable Securities

3 Months Ended

Mar. 31, 2018

Marketable Securities [Abstract]

Marketable Securities

Marketable Securities

Investments Available for Sale

Investments available for sale classified as non-current assets consist of: 

	At March 31, 2018
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
SEI-sponsored mutual funds	$	7,382	$	96	$	(50	)	$	7,428
Equities and other mutual funds	3,483		405		—			3,888
Debt securities	74,431		—		(2,658		)	71,773
	$	85,296	$	501	$	(2,708	)	$	83,089

	At December 31, 2017
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
SEI-sponsored mutual funds	$	7,369	$	110	$	(143	)	$	7,336
Equities and other mutual funds	3,456		458		—			3,914
Debt securities	77,745		—		(1,012		)	76,733
	$	88,570	$	568	$	(1,155	)	$	87,983

The Company adopted ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01) on January 1, 2018 which requires the Company to recognize all changes in fair value of available-for-sale equity securities in current period earnings. Previously, these changes in fair value were recognized as a separate component of comprehensive income. The adoption of ASU 2016-01 did not have a material impact to the Company's consolidated financial statements.

Net unrealized losses at March 31, 2018 and December 31, 2017 of the Company's available-for-sale debt securities were $2,016 (net of income tax benefit of $642) and $779 (net of income tax benefit of $233), respectively. These net unrealized losses are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

There were no material realized gains or losses from available-for-sale securities during the three months ended March 31, 2018 and 2017. Gains and losses from available-for-sale securities, including amounts reclassified from accumulated comprehensive loss, are reflected in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

Investments in Affiliated Funds

The Company has an investment in funds sponsored by LSV. The Company records this investment on the accompanying Consolidated Balance Sheets at fair value. Unrealized gains and losses from the change in fair value of these funds are recognized in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

The investment primarily consists of U.S. dollar denominated funds that invest primarily in securities of Canadian, Australian and Japanese companies as well as various other global securities. The underlying securities held by the funds are translated into U.S. dollars within the funds. The funds had a fair value of $5,534 and $6,034 at March 31, 2018 and December 31, 2017, respectively. The Company recognized losses of $500 and gains of $298 during the three months ended March 31, 2018 and 2017, respectively, from the change in fair value of the funds.

Securities Owned

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency securities with maturity dates less than one year. These investments are reflected as Securities owned on the accompanying Consolidated Balance Sheets. Due to specialized accounting practices applicable to investments by broker-dealers, the securities are reported at fair value and changes in fair value are recorded in current period earnings. The securities had a fair value of $21,600 and $21,526 at March 31, 2018 and December 31, 2017, respectively. There were no material net gains or losses related to the securities during the three months ended March 31, 2018 and 2017.

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Line of Credit

3 Months Ended

Mar. 31, 2018

Line of Credit Facility [Abstract]

Lines of Credit

Line of Credit

The Company has a five-year $300,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, National Association, and a syndicate of other lenders. The Credit Facility is scheduled to expire in June 2021, at which time any aggregate principal amount of loans outstanding becomes payable in full. Any borrowings made under the Credit Facility will accrue interest at rates that, at the Company's option, are based on a base rate (the Base Rate) plus a premium that can range from 0.25 percent to 1.00 percent or the London InterBank Offered Rate (LIBOR) plus a premium that can range from 1.25 percent to 2.00 percent depending on the Company’s Leverage Ratio (a ratio of consolidated indebtedness to consolidated EBITDA for the four preceding fiscal quarters, all as defined in the related agreement). The Base Rate is defined as the highest of a) the Federal Funds Rate, as published by the Federal Reserve Bank of New York, plus 0.50 percent, b) the prime commercial lending rate of Wells Fargo, c) the applicable LIBOR plus 1.00 percent, or d) 0 percent. The Company also pays quarterly commitment fees based on the unused portion of the Credit Facility. The quarterly fees for the Credit Facility can range from 0.15 percent of the amount of the unused portion to 0.30 percent, depending on the Company’s Leverage Ratio. Certain wholly-owned subsidiaries of the Company have guaranteed the obligations of the Company under the agreement. The aggregate amount of the Credit Facility may be increased by an additional $100,000 under certain conditions set forth in the agreement.

The Credit Facility contains covenants that restrict the ability of the Company to engage in mergers, consolidations, asset sales, investments, transactions with affiliates, or to incur liens, as defined in the agreement. In the event of a default under the Credit Facility, the Company would also be restricted from paying dividends on, or repurchasing, its common stock without the approval of the lenders. None of the covenants of the Credit Facility negatively affect the Company’s liquidity or capital resources. Upon the occurrence of certain financial or economic events, significant corporate events, or certain other events of default constituting an event of default under the Credit Facility, all loans outstanding may be declared immediately due and payable and all commitments under the agreement may be terminated.

In July 2017, the Company borrowed $40,000 under the Credit Facility for the funding of an acquisition. As of March 31, 2018, the outstanding balance of the Credit Facility was $20,000 and is included in Borrowings Under Revolving Credit Facility on the accompanying Consolidated Balance Sheet. The Company was in compliance with all covenants of the Credit Facility during the three months ended March 31, 2018.

In April 2018, the Company made a principal payment of $20,000 to fully repay the outstanding balance of the Credit Facility. As of April 19, 2018, the amount of the Credit Facility that is available for general corporate purposes was $300,000.

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Shareholders' Equity

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ Equity

Stock-Based Compensation

The Company has only non-qualified stock options outstanding under its equity compensation plans. All outstanding stock options have performance-based vesting provisions specific to each option grant that tie the vesting of the applicable stock options to the Company’s financial performance. The Company’s stock options vest at a rate of 50 percent when a specified diluted earnings per share target is achieved, and the remaining 50 percent when a second, higher specified diluted earnings per share target is achieved. Options do not vest due to the passage of time but solely as a result of achievement of the financial vesting targets. Options granted in December 2017 include a service condition which requires a minimum two or four year waiting period from the grant date along with the attainment of the applicable financial vesting target. Earnings per share targets exclude the impact of stock-based compensation and are established at time of grant. The targets are measured annually on December 31. The amount of stock-based compensation expense recognized in the period is based upon management’s estimate of when the earnings per share targets may be achieved. Any change in management’s estimate could result in the remaining amount of stock-based compensation expense to be accelerated, spread out over a longer period, or reversed. This may cause volatility in the recognition of stock-based compensation expense in future periods and could materially affect the Company’s earnings.

The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three months ended March 31, 2018 and 2017, respectively, as follows: 

	Three Months Ended March 31,
	2018			2017
Stock-based compensation expense	$	5,195		$	6,180
Less: Deferred tax benefit	(1,103		)	(2,153		)
Stock-based compensation expense, net of tax	$	4,092		$	4,027

As of March 31, 2018, there was approximately $56,579 of unrecognized compensation cost remaining related to unvested employee stock options that management expects will vest and is being amortized.

The Company issues new common shares associated with the exercise of stock options. The total intrinsic value of options exercised during the three months ended March 31, 2018 was $93,668. The total options exercisable as of March 31, 2018 had an intrinsic value of $393,003. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of March 31, 2018 and the weighted average exercise price of the shares. The market value of the Company’s common stock as of March 31, 2018 was $74.91 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of March 31, 2018 was $29.20. Total options that were outstanding as of March 31, 2018 were 14,652,000. Total options that were exercisable as of March 31, 2018 were 8,598,000.

Common Stock Buyback

The Company’s Board of Directors, under multiple authorizations, has authorized the repurchase of the Company’s common stock on the open market or through private transactions. The Company purchased 1,122,000 shares at a total cost of $82,257 during the three months ended March 31, 2018, which reduced the total shares outstanding of common stock. The cost of stock purchases during the period includes the cost of certain transactions that settled in the following quarter. As of March 31, 2018, the Company had approximately $88,380 of authorization remaining for the purchase of common stock under the program.

The Company immediately retires its common stock when purchased. Upon retirement, the Company reduces Capital in excess of par value for the average capital per share outstanding and the remainder is charged against Retained earnings. If the Company reduces its Retained earnings to zero, any subsequent purchases of common stock will be charged entirely to Capital in excess of par value.

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Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss, net of tax, are as follows: 

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Investments			Accumulated Other Comprehensive Loss
Balance, January 1, 2018	$	(19,522	)	$	(386	)	$	(19,908	)
Other comprehensive gain before reclassifications	3,377			(1,357		)	2,020
Amounts reclassified from accumulated other comprehensive loss	—			(273		)	(273		)
Net current-period other comprehensive gain	3,377			(1,630		)	1,747
Balance, March 31, 2018	$	(16,145	)	$	(2,016	)	$	(18,161	)

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Business Segment Information

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Business Segment Information

Business Segment Information

The Company’s reportable business segments are:

Private Banks – provides outsourced investment processing and investment management platforms to banks and trust institutions, independent wealth advisers and financial advisors worldwide;

Investment Advisors – provides investment management and investment processing platforms to affluent investors through a network of independent registered investment advisors, financial planners and other investment professionals in the United States;

Institutional Investors – provides investment management and administrative outsourcing platforms to retirement plan sponsors, healthcare systems and not-for-profit organizations worldwide;

Investment Managers – provides investment operations outsourcing platforms to fund companies, banking institutions and both traditional and non-traditional investment managers worldwide; and

Investments in New Businesses – focuses on providing investment management programs to ultra-high-net-worth families residing in the United States; developing internet-based investment services and advice platforms; entering new markets; and conducting other research and development activities.

The information in the following tables is derived from the Company’s internal financial reporting used for corporate management purposes. There are no inter-segment revenues for the three months ended March 31, 2018 and 2017. Management evaluates Company assets on a consolidated basis during interim periods. The accounting policies of the reportable business segments are the same as those described in Note 1 to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

The following tables highlight certain financial information about each of the Company’s business segments for the three months ended March 31, 2018 and 2017.

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses			Total
	For the Three Months Ended March 31, 2018
Revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896		$	405,598
Expenses	112,202		52,453		41,249		63,338		5,098			274,340
Operating profit (loss)	$	9,962	$	46,739	$	44,242	$	33,517	$	(3,202	)	$	131,258

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses			Total
	For the Three Months Ended March 31, 2017
Revenues	$	112,634	$	88,238	$	77,004	$	80,487	$	1,621		$	359,984
Expenses	108,550		47,539		38,828		52,065		4,880			251,862
Operating profit (loss)	$	4,084	$	40,699	$	38,176	$	28,422	$	(3,259	)	$	108,122

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017 is as follows: 

	2018			2017
Total operating profit from segments	$	131,258		$	108,122
Corporate overhead expenses	(14,942		)	(14,605		)
Income from operations	$	116,316		$	93,517

The following tables provide additional information for the three months ended March 31, 2018 and 2017 pertaining to our business segments: 

	Capital Expenditures (1)				Depreciation
	2018		2017		2018		2017
Private Banks	$	10,239	$	12,850	$	3,319	$	4,410
Investment Advisors	4,260		4,532		1,105		733
Institutional Investors	967		811		448		227
Investment Managers	2,520		1,615		1,809		916
Investments in New Businesses	204		106		150		368
Total from business segments	$	18,190	$	19,914	$	6,831	$	6,654
Corporate overhead	308		152		291		146
	$	18,498	$	20,066	$	7,122	$	6,800

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2018		2017
Private Banks	$	6,627	$	8,464
Investment Advisors	2,357		2,850
Institutional Investors	427		323
Investment Managers	2,345		216
Investments in New Businesses	40		119
Total from business segments	$	11,796	$	11,972
Corporate overhead	58		50
	$	11,854	$	12,022

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Income Taxes

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The gross liability for unrecognized tax benefits at March 31, 2018 and December 31, 2017 was $14,685 and $14,480, respectively, exclusive of interest and penalties, of which $13,986 and $13,737 would affect the effective tax rate if the Company were to recognize the tax benefit.

The Company classifies interest and penalties on unrecognized tax benefits as income tax expense. As of March 31, 2018 and December 31, 2017, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $1,218 and $1,175, respectively.

	March 31, 2018		December 31, 2017
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	14,685	$	14,480
Interest and penalties on unrecognized benefits	1,218		1,175
Total gross uncertain tax positions	$	15,903	$	15,655
Amount included in Current liabilities	$	2,944	$	3,275
Amount included in Other long-term liabilities	12,959		12,380
	$	15,903	$	15,655

The Company's effective income tax rate for the three months ended March 31, 2018 and 2017 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2018		2017
Statutory rate	21.0	%	35.0	%
State taxes, net of federal tax benefit	2.2		1.5
Foreign tax expense and tax rate differential	(0.2	)	(0.8	)
Tax benefit from stock option exercises	(10.8	)	(4.2	)
Other, net	(0.3	)	(0.5	)
	11.9	%	31.0	%

The decrease in the tax rate for the three months ended March 31, 2018 was primarily due to the tax changes enacted in the 2017 Tax Cut and Jobs Act (The Tax Act). The Tax Act was enacted on December 22, 2017 and included a permanent reduction in the corporate tax rate from 35.0 percent to 21.0 percent. In addition, the rate was favorably impacted by an increase in the excess tax benefits recognized on stock-based compensation expense due to a higher volume of stock option exercise activity.

The Tax Act also imposed a territorial rather than worldwide system which requires a one-time transition tax on the repatriation of previously deferred foreign earnings. The Company's estimate of the one-time transition tax as of March 31, 2018 was $11,544, of which $915 is expected to be paid within one year and $10,629 is included in Long-term income taxes payable on the accompanying Consolidated Balance Sheet.

The Company files income tax returns in the United States on a consolidated basis and in many U.S. state and foreign jurisdictions. The Company is subject to examination of income tax returns by the Internal Revenue Service (IRS) and other domestic and foreign tax authorities. The Company is no longer subject to U.S. federal income tax examination for years before 2014 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2013.

The Company estimates it will recognize $2,944 of gross unrecognized tax benefits. This amount is expected to be paid within one year or to be removed at the expiration of the statute of limitations and resolution of income tax audits and is netted against the current payable account. These unrecognized tax benefits are related to tax positions taken on certain federal, state, and foreign tax returns. However, the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year. While it is reasonably possible that some issues under examination could be resolved in the next twelve months, based upon the current facts and circumstances, the Company cannot reasonably estimate the timing of such resolution or the total range of potential changes as it relates to the current unrecognized tax benefits that are recorded as part of the Company’s financial statements.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

In the normal course of business, the Company is party to various claims and legal proceedings.

SEI has been named in seven lawsuits filed in Louisiana courts; four of the cases also name SPTC as a defendant. The underlying allegations in all actions relate to the purported role of SPTC in providing back-office services to Stanford Trust Company. The complaints allege that SEI and SPTC participated in some manner in the sale of “certificates of deposit” issued by Stanford International Bank so as to be a “seller” of the certificates of deposit for purposes of primary liability under the Louisiana Securities Law or so as to be secondarily liable under that statute for sales of certificates of deposit made by Stanford

Trust Company. Two of the actions also include claims for violations of the Louisiana Racketeering Act and possibly conspiracy, and a third also asserts claims of negligence, breach of contract, breach of fiduciary duty, violations of the uniform fiduciaries law, negligent misrepresentation, detrimental reliance, violations of the Louisiana Racketeering Act, and conspiracy.

The procedural status of the seven cases varies. The Lillie case, filed originally in the 19th Judicial District Court for the Parish of East Baton Rouge, was brought as a class action and is procedurally the most advanced of the cases. SEI and SPTC filed exceptions, which the Court granted in part, dismissing claims under the Louisiana Unfair Trade Practices Act and permitting the claims under the Louisiana Securities Law to go forward. On March 11, 2013, newly-added insurance carrier defendants removed the case to the United States District Court for the Middle District of Louisiana. On August 7, 2013, the Judicial Panel on Multidistrict Litigation transferred the matter to the Northern District of Texas where MDL 2099, In re: Stanford Entities Securities Litigation (“the Stanford MDL”), is pending. On September 22, 2015, the District Court on the motion of SEI and SPTC dismissed plaintiffs’ claims for primary liability under Section 714(A) of the Louisiana Securities Law, but declined to dismiss plaintiffs’ claims for secondary liability under Section 714(B) of the Louisiana Securities Law based on the allegations pled by plaintiffs. On November 4, 2015, the District Court granted SEI and SPTC's motion to dismiss plaintiffs' claims under Section 712(D) of the Louisiana Securities Law. Consequently, the only claims of plaintiffs still pending before the District Court in Lillie are plaintiffs' claims for secondary liability against SEI and SPTC under Section 714(B) of the Louisiana Securities Law. On May 2, 2016, the District Court certified the class as being "all persons for whom Stanford Trust Company purchased or renewed Stanford Investment Bank Limited certificates of deposit in Louisiana between January 1, 2007 and February 13, 2009". Notice of the pendency of the class action was mailed to potential class members on October 4, 2016.

On December 1, 2016, a group of plaintiffs who opted out of the Lillie class filed a complaint against SEI and SPTC in the United States District Court in the Middle District of Louisiana, alleging claims essentially the same as those in Lillie. In January 2017, the Judicial Panel on Multidistrict Litigation transferred the proceeding to the Northern District of Texas and the Stanford MDL. During February 2017, SEI filed its response to the Complaint and in March 2017 the District Court for the Northern District of Texas approved the stipulated dismissal of all claims in this complaint predicated on Section 712(D) or Section 714(A) of the Louisiana Securities Law.

Another one of the cases, filed in the 23rd Judicial District Court for the Parish of Ascension, also was removed to federal court and transferred by the Judicial Panel on Multidistrict Litigation to the Northern District of Texas and the Stanford MDL. The schedule for responding to that Complaint has not yet been established.

The plaintiffs in two of the cases remaining in the Parish of East Baton Rouge have granted SEI and SPTC indefinite extensions to respond to the petitions.

In the two additional cases, filed in East Baton Rouge and brought by the same counsel who filed the Lillie action, virtually all of the litigation to date has involved motions practice and appellate litigation regarding the existence of federal subjection matter jurisdiction under the federal Securities Litigation Uniform Standards Act (SLUSA). After the matter was removed to the United States District Court for the Northern District of Texas, that court dismissed the action under SLUSA. The Court of Appeals for the Fifth Circuit reversed that order, and the Supreme Court of the United States affirmed the Court of Appeals judgment on February 26, 2014. The matter was remanded to state court and no material activity has taken place since that date.

While the outcome of this litigation remains uncertain, SEI and SPTC believe that they have valid defenses to plaintiffs' claims and intend to defend the lawsuits vigorously. Because of uncertainty in the make-up of the Lillie class, the specific theories of liability that may survive a motion for summary judgment or other dispositive motion, the relative lack of discovery regarding damages, causation, mitigation and other aspects that may ultimately bear upon loss, the Company is not reasonably able to provide an estimate of loss, if any, with respect to the foregoing lawsuits.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

In July 2017, the Company acquired all ownership interests of Archway Technology Partners, LLC, Archway Finance & Operations, Inc. and Keystone Capital Holdings, LLC (collectively, Archway), a provider of operating technologies and services to the family office industry. The total purchase price was allocated to Archway’s net tangible and intangible assets based upon their estimated fair values at the date of purchase. The excess purchase price over the value of the net tangible and identifiable intangible assets was recorded as goodwill. The total amount of goodwill from this transaction amounted to $52,990 and is included on the accompanying Consolidated Balance Sheets.

The Company identified intangible assets related to Archway that met the contractual-legal criterion for recognition apart from goodwill. The identifiable intangible assets included on the accompanying Consolidated Balance Sheets consist of:

	March 31, 2018			December 31, 2017
Acquired technology	$	13,510		$	13,510
Client relationships	10,760			10,760
Non-competition agreements	3,470			3,470
Trade name	2,390			2,390
	30,130			30,130
Less: Accumulated amortization	(2,328		)	(1,552		)
Intangible assets, net	$	27,802		$	28,578

The Company recognized $776 of amortization expense related to the intangible assets during the three months ended March 31, 2018. Goodwill and the identifiable intangible assets related to Archway have been allocated to the Investment Managers segment.

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Revenues from Contracts with Customers

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenues from Contracts with Customers

Revenues from Contracts with Customers

The Company’s principal sources of revenues are: (1) asset management, administration and distribution fees primarily earned based upon a contractual percentage of net assets under management or administration; and (2) information processing and software servicing fees that are either recurring and primarily earned based upon the number of trust accounts being serviced or a percentage of the total average daily market value of the clients' assets processed on the Company's platforms, or non-recurring and based upon project-oriented contractual agreements related to client implementations.

Disaggregation of Revenue

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the three months ended March 31, 2018:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2018
Investment management fees from pooled investment products	$	35,190	$	72,418	$	15,858	$	—	$	225	$	123,691
Investment management fees from investment management agreements	198		22,764		69,276		83		1,634		93,955
Investment operations fees	382		—		—		87,455		—		87,837
Investment processing fees - PaaS	44,585		—		—		483		—		45,068
Investment processing fees - SaaS	34,602		—		—		2,365		—		36,967
Professional services fees	5,419		—		—		1,887		—		7,306
Account fees and other	1,788		4,010		357		4,582		37		10,774
Total revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896	$	405,598
Primary Geographic Markets:
United States	$	78,133	$	99,192	$	64,768	$	91,759	$	1,896	$	335,748
United Kingdom	27,525		—		14,787		—		—		42,312
Canada	11,601		—		2,671		—		—		14,272
Ireland	4,905		—		2,427		5,096		—		12,428
Other	—		—		838		—		—		838
Total revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896	$	405,598

Investment management fees from pooled investment products - Revenues associated with clients' assets invested in Company-sponsored pooled investment products. Contractual fees are stated as a percentage of the average market value of assets under management and collected on a monthly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment management fees from Investment Management agreements - Revenues based on assets of clients of the Institutional Investors segment primarily invested in Company-sponsored products. Each client is charged an investment management fee that is stated as a percentage of the average market value of all assets under management. The client is billed directly on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Revenues associated with the separately managed account program offered through registered investment advisors located throughout the United States. The contractual fee is stated as a percentage of the average market value of all assets invested in the separately managed account and collected on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment operations fees - Revenues earned from accounting and administrative services, distribution support services and regulatory and compliance services to investment management firms that offer traditional and alternative products. The Company contracts directly with the investment management firm. The contractual fees are stated as a percentage of net assets under administration and billed when asset valuations are finalized. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment Processing fees - Software as a Service - Revenues associated with clients that outsource investment processing technology software and computer processing by accessing our proprietary software and data center remotely but retain responsibility for all investment operations, client administration and other back-office trust operations. The contractual fee is based on a monthly fee plus additional fees determined on a per-account or per-transaction basis. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment Processing fees - Platform as a Service - Revenues associated with clients that outsource their entire investment operation and back-office processing functions. Through the use of the Company's proprietary platforms, the Company assumes all back-office investment processing services including investment processing, custody and safekeeping of assets, income collections, securities settlement and other related trust activities. The contractual fee is based on a monthly fee plus additional fees determined on a per-account or per-transaction basis. Contractual fees can also be stated as a percentage of the value of assets processed on the Company's platforms each month as long as the fee is in excess of a monthly contractual minimum. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Professional Services - Revenues associated with the business services migration for investment processing clients of the Private Banks segment and investment operations clients of the Investment Managers segment. In addition, Professional services include other services such as business transformation consulting. Typically, fees are stated as a contractual fixed fee. The client is billed directly and fees are collected according to the terms of the agreement.

Other - Revenues associated with custody account servicing, account terminations, reimbursements received for out-of-pocket expenses, and other fees for the provision of ancillary services.

Revenue is recognized by the Company when the performance obligations are satisfied and transfer of control to the client is completed. The majority of the Company’s performance obligations are satisfied and control is transferred to the client continuously. Therefore, revenue is recognized on a monthly basis. The amount of revenue recognized reflects the amount of consideration expected to be received by the Company in exchange for satisfied performance obligations.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $19,875 as of March 31, 2018. The expense related to the deferred contract costs during the three months ended March 31, 2018 was immaterial. There was no impairment loss in relation to the costs capitalized during the three months ended March 31, 2018.

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Summary of Significant Accounting Policies (Policy)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Certain financial information and accompanying note disclosure normally included in the Company’s Annual Report on Form 10-K have been condensed or omitted. The interim financial information is unaudited but reflects all adjustments (consisting of only normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of financial position of the Company as of March 31, 2018, the results of operations for the three months ended March 31, 2018 and 2017, and cash flows for the three-month periods ended March 31, 2018 and 2017. These interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

The Company adopted the requirements of Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Accounting Standards Codification (ASC) 606 (ASC 606)) using the modified retrospective method during the three months ended March 31, 2018. As a result of the adoption of ASC 606, the Company recorded a cumulative effect adjustment of $14,402 to retained earnings as of January 1, 2018. Prior period information has not been restated (see following caption "Revenue Recognition"). The Company also adopted ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (see Note 6) and ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230) (see following caption "Statements of Cash Flows"). All amounts and disclosures set forth in this Form 10-Q have been updated to comply with the new standards.

Revenue Recognition

Revenue Recognition

Revenue is recognized when the transfer of control of promised goods or services under the terms of a contract with customers are satisfied in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those promised goods or services. Certain portions of the Company’s revenues involve a third party in providing goods or services to its customers. In such circumstances, the Company must determine whether the nature of its promise to the customer is to provide the underlying goods or services (the Company is the principal in the transaction and reports the transaction gross) or to arrange for a third party to provide the underlying goods or services (the entity is the agent in the transaction and reports the transaction net).

ASC 606 did not change the accounting for the majority of the Company’s revenue arrangements and did not have a material impact to the Company’s consolidated financial statements. The following is a summary of the impact from the adoption of ASC 606:

•The majority of the Company’s services are bundled together, and provided and completed for the client on a monthly basis. For these revenue arrangements, the Company will continue to recognize revenue on a monthly basis as the client consumes the benefits continuously over time. The timing and recognition of revenues from these arrangements did not change.

•Contracts with new clients or with existing clients for new services generally include implementation fees. These fees are recognized in Information processing and software servicing fees when in connection with investment processing platforms and are recognized in Asset management, administration and distribution fees when in connection with investment operations platforms. The Company concluded that most of the current arrangements for implementation services are a distinct and separate performance obligation from the monthly recurring services. The timing and recognition of fees for most of these arrangements have not changed. However, each new revenue arrangement for implementation fees is analyzed to determine whether or not it is a distinct performance obligation. Implementation fees determined not to be a distinct performance obligation would be required to be recognized over the expected life of the client relationship along with the costs relating directly to satisfying such performance obligation. The Company will evaluate each contract in accordance with the requirements of ASC 606.

•Research services provided by SIDCO, the Company’s broker-dealer subsidiary, to customers in soft-dollar arrangements were determined to be a separate performance obligation. Research services provided by a broker-dealer may be internally generated or provided by a third party and paid directly by the broker-dealer on the customer’s behalf. It was determined that SIDCO is considered an agent since it does not control the research services before they are transferred to the customer. Therefore, fees received for research services should be recorded in revenues net of amounts paid for the soft dollar arrangement. These amounts paid by the Company were previously recorded gross as an expense and, beginning January 1, 2018, are recorded net of any revenue recognized. The amounts related to soft dollar arrangements during the three months ended March 31, 2018 and 2017 were $3,730 and $4,073, respectively.

•Incremental contract acquisition costs related to information processing contracts in the Private Banks segment and investment operations contracts in the Investment Managers segment will be deferred and recognized over the expected client life. These costs primarily consist of sales compensation payments to the Company's sales personnel. As a result, incremental contract acquisition costs are capitalized and subsequently amortized. The Company recorded a cumulative effect adjustment to retained earnings associated with the capitalization of contract costs. For the Company's other sales compensation payments, the Company either applies the practical expedient permitting the expensing of costs to obtain a contract when the expected amortization period is one year or less or there are no contract acquisition costs required to be deferred under the requirements of ASC 606.

Cash and Cash Equivalents

Cash and Cash EquivalentsCash and cash equivalents includes $341,413 and $401,292 at March 31, 2018 and December 31, 2017, respectively, primarily invested in SEI-sponsored open-ended money market mutual funds. The SEI-sponsored mutual funds are Level 1 assets.For purposes of the Consolidated Statements of Cash Flows, the Company considers investment instruments purchased with an original maturity of three months or less to be cash equivalents.

Restricted Cash

Restricted CashRestricted cash includes $3,000 at March 31, 2018 and December 31, 2017 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $507 and $505 at March 31, 2018 and December 31, 2017, respectively, segregated in special reserve accounts for the benefit of customers of the Company’s broker-dealer subsidiary, SEI Investments Distribution Co. (SIDCO), in accordance with certain rules established by the Securities and Exchange Commission (SEC) for broker-dealers.

Reclassifications

ReclassificationsCertain prior year amounts have been reclassified to conform to current year presentation.

New Accounting Pronouncements

New Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases (ASU 2016-02) requiring lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The updated standard is effective for the Company beginning in the first quarter of 2019. Early adoption is permitted. While the Company is not yet in a position to assess the full impact of the adoption of ASU 2016-02 on its consolidated financial statements and related disclosures, the Company is currently in the process of cataloging existing lease agreements and evaluating the transition method to be elected.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) which requires that expected credit losses relating to financial assets measured on an amortized cost basis and available-for-sale debt securities be recorded through an allowance for credit losses. ASU 2016-13 limits the amount of credit losses to be recognized for available-for-sale debt securities to the amount by which carrying value exceeds fair value and also requires the reversal of previously recognized credit losses if fair value increases. ASU 2016-13 becomes effective for the Company during the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures.

In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04). The objective of ASU 2017-04 is to simplify the subsequent measurement of goodwill by entities performing their annual goodwill impairment tests by comparing the fair value of a reporting unit, including income tax effects from any tax-deductible goodwill, with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds fair value. ASU 2017-04 is effective for the Company beginning in the first quarter of 2020. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2017-04 on its consolidated financial statements and related disclosures.

Equity Method Investments

The Company accounts for its interest in LSV using the equity method because of its less than 50 percent ownership. The Company’s interest in the net assets of LSV is reflected in Investment in unconsolidated affiliate on the accompanying Consolidated Balance Sheets and its interest in the earnings of LSV is reflected in Equity in earnings of unconsolidated affiliate on the accompanying Consolidated Statements of Operations.

Variable Interest Entities

The Company has concluded that it is not the primary beneficiary of the entities and; therefore, is not required to consolidate any of the pooled investment vehicles for which it receives asset management, distribution, administration and custodial fees under the VIE model. The entities either do not meet the definition of a VIE or the Company does not hold a variable interest in the entities. The entities either qualify for the money market scope exception, or are entities in which the Company’s asset management, distribution, administration and custodial fees are commensurate with the services provided and include fair terms and conditions, or are entities that are limited partnerships which have substantive kick-out rights. The Company acts as a fiduciary and does not hold any other interests other than insignificant seed money investments in the pooled investment vehicles. For this reason, the Company also concluded that it is not required to consolidate the pooled investment vehicles under the voting interest entity (VOE) model.

Fair Value of Financial Instruments

The fair value of the Company’s financial assets and liabilities, except for the Company's investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the Company’s Level 1 financial assets consist mainly of investments in open-ended mutual funds that are quoted daily. Level 2 financial assets consist of Government National Mortgage Association (GNMA) mortgage-backed securities held by the Company's wholly-owned limited purpose federal thrift subsidiary, SEI Private Trust Company (SPTC), Federal Home Loan Bank (FHLB) and other U.S. government agency short-term notes held by SIDCO. The financial assets held by SIDCO were purchased as part of a cash management program requiring only short term, top-tier investment grade government and corporate securities. The financial assets held by SPTC are debt securities issued by GNMA and are backed by the full faith and credit of the U.S. government. These securities were purchased for the sole purpose of satisfying applicable regulatory requirements and have maturity dates which range from 2021 to 2041.

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

The valuation of the Company's Level 2 financial assets held by SIDCO and SPTC are based upon securities pricing policies and procedures utilized by third-party pricing vendors.

The pricing policies and procedures applied for our Level 1 and Level 2 financial assets during the three months ended March 31, 2018 were consistent with those as described in our Annual Report on Form 10-K at December 31, 2017. The Company had no Level 3 financial assets or liabilities at March 31, 2018 or December 31, 2017 that were required to be measured at fair value on a recurring basis.

Investments in Affiliated Funds

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

Available-for-sale Securities

These net unrealized losses are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

Securities Owned

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency securities with maturity dates less than one year. These investments are reflected as Securities owned on the accompanying Consolidated Balance Sheets. Due to specialized accounting practices applicable to investments by broker-dealers, the securities are reported at fair value and changes in fair value are recorded in current period earnings.

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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Calculation Of Basic And Diluted Earnings Per Share

The calculations of basic and diluted earnings per share for the three months ended March 31, 2018 and 2017 are:

	Three Months Ended March 31,
	2018		2017
Net income	$	139,838	$	88,737
Shares used to compute basic earnings per common share	157,434,000		159,091,000
Dilutive effect of stock options	5,990,000		3,651,000
Shares used to compute diluted earnings per common share	163,424,000		162,742,000
Basic earnings per common share	$	0.89	$	0.56
Diluted earnings per common share	$	0.86	$	0.55

Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities

The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the three months ended March 31:

	2018			2017
Net income	$	139,838		$	88,737
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,122			6,800
Amortization	11,854			12,022
Equity in earnings of unconsolidated affiliate	(40,607		)	(33,565		)
Distributions received from unconsolidated affiliate	45,617			35,265
Stock-based compensation	5,195			6,180
Provision for losses on receivables	93			(5		)
Deferred income tax expense	2,083			877
Net gain from investments	410			(347		)
Change in other long-term liabilities	579			965
Change in other assets	290			(849		)
Other	(784		)	56
Change in current assets and liabilities
Decrease (increase) in
Receivables from investment products	1,757			10,308
Receivables	(25,657		)	(24,243		)
Other current assets	(3,564		)	(2,298		)
Increase (decrease) in
Accounts payable	3,195			1,406
Accrued liabilities	(43,522		)	(27,754		)
Deferred revenue	275			(543		)
Total adjustments	(35,664		)	(15,725		)
Net cash provided by operating activities	$	104,174		$	73,012

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Investment In Unconsolidated Affiliate (Tables)

3 Months Ended

Mar. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

Condensed financial information of LSV

These tables contain condensed financial information of LSV: 

Condensed Statement of Operations	Three Months Ended March 31,
	2018		2017
Revenues	$	131,718	$	109,953
Net income	104,406		86,215

Condensed Balance Sheets	March 31, 2018		December 31, 2017
Current assets	$	143,922	$	155,239
Non-current assets	1,444		1,407
Total assets	$	145,366	$	156,646
Current liabilities	$	47,641	$	46,486
Partners’ capital	97,725		110,160
Total liabilities and partners’ capital	$	145,366	$	156,646

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Composition of Certain Financial Statement Captions (Tables)

3 Months Ended

Mar. 31, 2018

Items Included in Consolidated Statement of Financial Condition [Abstract]

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2018			December 31, 2017
Trade receivables	$	72,764		$	76,760
Fees earned, not billed	220,414			194,331
Other receivables	15,880			12,310
	309,058			283,401
Less: Allowance for doubtful accounts	(788		)	(695		)
	$	308,270		$	282,706

Property And Equipment

Property and Equipment on the accompanying Consolidated Balance Sheets consists of:

	March 31, 2018			December 31, 2017
Buildings	$	154,007		$	153,961
Equipment	118,823			115,546
Land	10,557			10,030
Purchased software	136,226			134,610
Furniture and fixtures	18,320			18,114
Leasehold improvements	18,851			18,017
Construction in progress	5,741			6,105
	462,525			456,383
Less: Accumulated depreciation	(317,245		)	(309,955		)
Property and Equipment, net	$	145,280		$	146,428

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2018		December 31, 2017
Accrued employee compensation	$	28,714	$	88,960
Accrued consulting, outsourcing and professional fees	35,682		29,658
Accrued sub-advisory, distribution and other asset management fees	39,680		42,365
Accrued dividend payable	—		47,179
Accrued income taxes	19,282		5,583
Other accrued liabilities	45,260		51,313
Total accrued liabilities	$	168,618	$	265,058

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Of Certain Financial Assets And Liabilities

The fair value of certain financial assets of the Company was determined using the following inputs:

			Fair Value Measurements at the End of the Reporting Period Using
Assets	March 31, 2018		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity available-for-sale securities	$	11,316	$	11,316	$	—
Fixed-income available-for-sale securities	71,773		—		71,773
Fixed-income securities owned	21,600		—		21,600
Investment funds sponsored by LSV (1)	5,534
	$	110,223	$	11,316	$	93,373

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2017		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity available-for-sale securities	$	11,250	$	11,250	$	—
Fixed-income available-for-sale securities	76,733		—		76,733
Fixed-income securities owned	21,526		—		21,526
Investment funds sponsored by LSV (1)	6,034
	$	115,543	$	11,250	$	98,259

(1) The fair value amounts presented in the tables above are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the accompanying Consolidated Balance Sheets (See Note 6).

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Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2018

Marketable Securities [Abstract]

Investments Available For Sale

Investments available for sale classified as non-current assets consist of: 

	At March 31, 2018
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
SEI-sponsored mutual funds	$	7,382	$	96	$	(50	)	$	7,428
Equities and other mutual funds	3,483		405		—			3,888
Debt securities	74,431		—		(2,658		)	71,773
	$	85,296	$	501	$	(2,708	)	$	83,089

	At December 31, 2017
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)			Fair Value
SEI-sponsored mutual funds	$	7,369	$	110	$	(143	)	$	7,336
Equities and other mutual funds	3,456		458		—			3,914
Debt securities	77,745		—		(1,012		)	76,733
	$	88,570	$	568	$	(1,155	)	$	87,983

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Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2018

Stockholders' Equity Note [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three months ended March 31, 2018 and 2017, respectively, as follows: 

	Three Months Ended March 31,
	2018			2017
Stock-based compensation expense	$	5,195		$	6,180
Less: Deferred tax benefit	(1,103		)	(2,153		)
Stock-based compensation expense, net of tax	$	4,092		$	4,027

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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule Of Accumulated Other Comprehensive Income (Loss), Net Of Tax

The components of Accumulated other comprehensive loss, net of tax, are as follows: 

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Investments			Accumulated Other Comprehensive Loss
Balance, January 1, 2018	$	(19,522	)	$	(386	)	$	(19,908	)
Other comprehensive gain before reclassifications	3,377			(1,357		)	2,020
Amounts reclassified from accumulated other comprehensive loss	—			(273		)	(273		)
Net current-period other comprehensive gain	3,377			(1,630		)	1,747
Balance, March 31, 2018	$	(16,145	)	$	(2,016	)	$	(18,161	)

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Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule Of Financial Information About Business Segments

The following tables highlight certain financial information about each of the Company’s business segments for the three months ended March 31, 2018 and 2017.

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses			Total
	For the Three Months Ended March 31, 2018
Revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896		$	405,598
Expenses	112,202		52,453		41,249		63,338		5,098			274,340
Operating profit (loss)	$	9,962	$	46,739	$	44,242	$	33,517	$	(3,202	)	$	131,258

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses			Total
	For the Three Months Ended March 31, 2017
Revenues	$	112,634	$	88,238	$	77,004	$	80,487	$	1,621		$	359,984
Expenses	108,550		47,539		38,828		52,065		4,880			251,862
Operating profit (loss)	$	4,084	$	40,699	$	38,176	$	28,422	$	(3,259	)	$	108,122

Reconciliation Of Total Operating Profit Reported For Business Segments To Income From Operations In Consolidated Statements Of Operations

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the three months ended March 31, 2018 and 2017 is as follows: 

	2018			2017
Total operating profit from segments	$	131,258		$	108,122
Corporate overhead expenses	(14,942		)	(14,605		)
Income from operations	$	116,316		$	93,517

Reconciliation of Other Significant Reconciling Items from Segments to Consolidated

The following tables provide additional information for the three months ended March 31, 2018 and 2017 pertaining to our business segments: 

	Capital Expenditures (1)				Depreciation
	2018		2017		2018		2017
Private Banks	$	10,239	$	12,850	$	3,319	$	4,410
Investment Advisors	4,260		4,532		1,105		733
Institutional Investors	967		811		448		227
Investment Managers	2,520		1,615		1,809		916
Investments in New Businesses	204		106		150		368
Total from business segments	$	18,190	$	19,914	$	6,831	$	6,654
Corporate overhead	308		152		291		146
	$	18,498	$	20,066	$	7,122	$	6,800

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2018		2017
Private Banks	$	6,627	$	8,464
Investment Advisors	2,357		2,850
Institutional Investors	427		323
Investment Managers	2,345		216
Investments in New Businesses	40		119
Total from business segments	$	11,796	$	11,972
Corporate overhead	58		50
	$	11,854	$	12,022

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Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Schedule Of Interest And Penalties

	March 31, 2018		December 31, 2017
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	14,685	$	14,480
Interest and penalties on unrecognized benefits	1,218		1,175
Total gross uncertain tax positions	$	15,903	$	15,655
Amount included in Current liabilities	$	2,944	$	3,275
Amount included in Other long-term liabilities	12,959		12,380
	$	15,903	$	15,655

Schedule of Effective Income Tax Rate Reconciliation

The Company's effective income tax rate for the three months ended March 31, 2018 and 2017 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2018		2017
Statutory rate	21.0	%	35.0	%
State taxes, net of federal tax benefit	2.2		1.5
Foreign tax expense and tax rate differential	(0.2	)	(0.8	)
Tax benefit from stock option exercises	(10.8	)	(4.2	)
Other, net	(0.3	)	(0.5	)
	11.9	%	31.0	%

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Identifiable Intangible Assets

The identifiable intangible assets included on the accompanying Consolidated Balance Sheets consist of:

	March 31, 2018			December 31, 2017
Acquired technology	$	13,510		$	13,510
Client relationships	10,760			10,760
Non-competition agreements	3,470			3,470
Trade name	2,390			2,390
	30,130			30,130
Less: Accumulated amortization	(2,328		)	(1,552		)
Intangible assets, net	$	27,802		$	28,578

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Revenues from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the three months ended March 31, 2018:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2018
Investment management fees from pooled investment products	$	35,190	$	72,418	$	15,858	$	—	$	225	$	123,691
Investment management fees from investment management agreements	198		22,764		69,276		83		1,634		93,955
Investment operations fees	382		—		—		87,455		—		87,837
Investment processing fees - PaaS	44,585		—		—		483		—		45,068
Investment processing fees - SaaS	34,602		—		—		2,365		—		36,967
Professional services fees	5,419		—		—		1,887		—		7,306
Account fees and other	1,788		4,010		357		4,582		37		10,774
Total revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896	$	405,598
Primary Geographic Markets:
United States	$	78,133	$	99,192	$	64,768	$	91,759	$	1,896	$	335,748
United Kingdom	27,525		—		14,787		—		—		42,312
Canada	11,601		—		2,671		—		—		14,272
Ireland	4,905		—		2,427		5,096		—		12,428
Other	—		—		838		—		—		838
Total revenues	$	122,164	$	99,192	$	85,491	$	96,855	$	1,896	$	405,598

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Summary of Significant Accounting Policies (New Accounting Pronouncements and Changes in Accounting Principle) (Details) $ in Thousands	Jan. 01, 2018 USD ($)
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cumulative effect adjustment	$ 14,402

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Expense related to soft dollar arrangement	$ 3,730	$ 4,073
Cash and cash equivalents invested in SEI-sponsored money market funds	748,299		$ 744,247
Restricted cash	3,507		3,505
Capitalized software development costs	12,887	$ 16,861
Net book value of capitalized software	$ 312,272		310,405
Anti-dilutive employee stock options	6,054	11,279
Anti-dilutive employee stock options, per share	$ 52.73	$ 37.70
SEI Wealth Platform [Member]
Capitalized software development costs	$ 12,042	$ 15,178
Net book value of capitalized software	287,530
Capitalized software in progress	33,237
Amortization expense of capitalized software	$ 9,719	11,972
SEI Wealth Platform [Member] | Weighted Average [Member]
Estimated useful life of capitalized software	8 years 4 months 24 days
Application for Investment Managers segment [Member]
Capitalized software development costs	$ 845	$ 1,683
Net book value of capitalized software	$ 24,742
Estimated useful life of capitalized software	5 years
Amortization expense of capitalized software	$ 1,301
SEI Investments (Europe) Limited [Member]
Restricted cash	3,000		3,000
SEI Investments Distribution Co. (SIDCO) [Member]
Restricted cash	507		505
SEI-Sponsored Open-Ended Money Market Mutual Funds [Member]
Cash and cash equivalents invested in SEI-sponsored money market funds	$ 341,413		$ 401,292

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Summary of Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounting Policies [Abstract]
Net income	$ 139,838	$ 88,737
Shares used to compute basic earnings per common share	157,434	159,091
Dilutive effect of stock options (in shares)	5,990	3,651
Shares used to compute diluted earnings per common share	163,424	162,742
Basic earnings per common share (in USD per share)	$ 0.89	$ 0.56
Diluted earnings per common share (in USD per share)	$ 0.86	$ 0.55

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Summary of Significant Accounting Policies (Net Cash Provided by Operating Activities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounting Policies [Abstract]
Net income	$ 139,838	$ 88,737
Depreciation	7,122	6,800
Amortization	11,854	12,022
Equity in earnings of unconsolidated affiliate	(40,607)	(33,565)
Distributions received from unconsolidated affiliate	45,617	35,265
Stock-based compensation	5,195	6,180
Provision for losses on receivables	93	(5)
Deferred income tax expense	2,083	877
Net gain from investments	410	(347)
Change in other long-term liabilities	579	965
Change in other assets	290	(849)
Other	(784)	56
Decrease (increase) in Receivables from investment products	1,757	10,308
Decrease (increase) in Receivables	(25,657)	(24,243)
Decrease (increase) in Other current assets	(3,564)	(2,298)
Increase (decrease) in Accounts payable	3,195	1,406
Increase (decrease) in Accrued liabilities	(43,522)	(27,754)
Increase (decrease) in Deferred revenue	275	(543)
Total adjustments	(35,664)	(15,725)
Net cash provided by operating activities	$ 104,174	$ 73,012

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Investment In Unconsolidated Affiliate (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments in and Advances to Affiliates [Line Items]
Distributions received from unconsolidated affiliate	$ 45,617	$ 35,265
Company's share in the earnings of equity method investee	40,607	33,565
L S V Asset Management [Member]
Investments in and Advances to Affiliates [Line Items]
Total investment in equity method investee	54,482
Distributions received from unconsolidated affiliate	45,617	35,265
Company's share in the earnings of equity method investee	$ 40,607	$ 33,565
Maximum [Member]
Investments in and Advances to Affiliates [Line Items]
Equity method investment, ownership percentage	50.00%

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Investment In Unconsolidated Affiliate (Statement of Operations) (Details) - L S V Asset Management [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Revenues	$ 131,718	$ 109,953
Net income	$ 104,406	$ 86,215

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Investment in Unconsolidated Affiliate (Balance Sheets) (Details) - L S V Asset Management [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Current assets	$ 143,922	$ 155,239
Non-current assets	1,444	1,407
Total assets	145,366	156,646
Current liabilities	47,641	46,486
Partners’ capital	97,725	110,160
Total liabilities and partners’ capital	$ 145,366	$ 156,646

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Variable Interest Entities - Investment Products (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
SEI-Sponsored Open-Ended Money Market Mutual Funds [Member]
Financial Support for Nonconsolidated Legal Entity [Line Items]
Fees waived according to expense limitation agreements	$ 6,654	$ 7,072

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Composition of Certain Financial Statement Captions (Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Items Included in Consolidated Statement of Financial Condition [Abstract]
Trade receivables	$ 72,764	$ 76,760
Fees earned, not billed	220,414	194,331
Other receivables	15,880	12,310
Receivables, Gross, Current	309,058	283,401
Less: Allowance for doubtful accounts	(788)	(695)
Receivables, net	$ 308,270	$ 282,706

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Composition of Certain Financial Statement Captions (Property And Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Property and Equipment [Line Items]
Property and Equipment, gross	$ 462,525		$ 456,383
Less: Accumulated depreciation	(317,245)		(309,955)
Property and Equipment, net	145,280		146,428
Depreciation expense	7,122	$ 6,800
Building [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	154,007		153,961
Equipment [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	118,823		115,546
Land [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	10,557		10,030
Purchased Software [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	136,226		134,610
Furniture and Fixtures [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	18,320		18,114
Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	18,851		18,017
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and Equipment, gross	$ 5,741		$ 6,105

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Composition of Certain Financial Statement Captions (Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Items Included in Consolidated Statement of Financial Condition [Abstract]
Accrued employee compensation	$ 28,714	$ 88,960
Accrued consulting, outsourcing and professional fees	35,682	29,658
Accrued sub-advisory, distribution and other asset management fees	39,680	42,365
Accrued dividend payable	0	47,179
Accrued income taxes	19,282	5,583
Other accrued liabilities	45,260	51,313
Total accrued liabilities	$ 168,618	$ 265,058

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Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity available-for-sale securities	$ 11,316	$ 11,250
Fixed-income available-for-sale securities	71,773	76,733
Fixed-income securities owned	21,600	21,526
Investment funds sponsored by LSV	5,534	6,034
Assets, fair value	110,223	115,543
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity available-for-sale securities	11,316	11,250
Fixed-income available-for-sale securities	0	0
Fixed-income securities owned	0	0
Assets, fair value	11,316	11,250
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity available-for-sale securities	0	0
Fixed-income available-for-sale securities	71,773	76,733
Fixed-income securities owned	21,600	21,526
Assets, fair value	$ 93,373	$ 98,259

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Marketable Securities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Schedule of Investments [Line Items]
Net unrealized losses	$ 2,016		$ 779
Unrealized losses during the period, income tax benefit	642		233
Fair value of investment funds sponsored by LSV	5,534		6,034
Securities owned	21,600		21,526
Investment Funds Sponsored by LSV [Member]
Schedule of Investments [Line Items]
Fair value of investment funds sponsored by LSV	5,534		$ 6,034
Gains (losses) from investment funds sponsored by LSV	$ (500)	$ 298

XML

Marketable Securities (Investments Available For Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Cost Amount	$ 85,296	$ 88,570
Gross Unrealized Gains	501	568
Gross Unrealized (Losses)	(2,708)	(1,155)
Fair Value	83,089	87,983
SEI-Sponsored Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost Amount	7,382	7,369
Gross Unrealized Gains	96	110
Gross Unrealized (Losses)	(50)	(143)
Fair Value	7,428	7,336
Equities and Other Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost Amount	3,483	3,456
Gross Unrealized Gains	405	458
Gross Unrealized (Losses)	0	0
Fair Value	3,888	3,914
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost Amount	74,431	77,745
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(2,658)	(1,012)
Fair Value	$ 71,773	$ 76,733

XML

Line of Credit (Details) - Revolving Credit Facility [Member] - USD ($)		1 Months Ended
	Jun. 13, 2016	Apr. 19, 2018	Jul. 31, 2017	Mar. 31, 2018
Line of Credit Facility [Line Items]
Credit facility term of agreement	5 years
Credit facility maximum borrowing capacity	$ 300,000,000
Credit facility stated percentage	0.00%
Credit facility accordion feature, increase limit	$ 100,000,000
Credit facility borrowings			$ 40,000,000
Credit facility amount outstanding at reporting date				$ 20,000,000
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Credit facility principal payment		$ 20,000,000
Credit facility remaining borrowing capacity		$ 300,000,000
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread (as a percent)	1.00%
Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread (as a percent)	0.50%
Minimum [Member]
Line of Credit Facility [Line Items]
Credit facility commitment fee per annum on daily unused portion (as a percent)	0.15%
Minimum [Member] | Lender's Base Rate Plus Market Spread [Member]
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread (as a percent)	0.25%
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread (as a percent)	1.25%
Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility commitment fee per annum on daily unused portion (as a percent)	0.30%
Maximum [Member] | Lender's Base Rate Plus Market Spread [Member]
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread (as a percent)	1.00%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread (as a percent)	2.00%

XML

Shareholders' Equity (Narrative) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 56,579
Total intrinsic value of options exercised	93,668
Aggregate intrinsic value of options exercisable	$ 393,003
Market value of Company's common stock | $ / shares	$ 74.91
Weighted average exercise price per share | $ / shares	$ 29.20
Total options outstanding | shares	14,652
Total options exercisable | shares	8,598
Common Stock Buyback [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased and retired | shares	1,122
Company purchased, cost	$ 82,257
Remaining stock repurchase authorization amount	$ 88,380
2014 Plan [Member] | Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	50.00%
2014 Plan [Member] | Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	50.00%

XML

Shareholders' Equity (Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Stock-based compensation expense	$ 5,195	$ 6,180
Less: Deferred tax benefit	(1,103)	(2,153)
Stock-based compensation expense, net of tax	$ 4,092	$ 4,027

XML

Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,476,839
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive gain before reclassifications	2,020
Amounts reclassified from accumulated other comprehensive loss	(273)
Net current-period other comprehensive gain	1,747
Ending balance	1,613,654
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(19,522)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive gain before reclassifications	3,377
Amounts reclassified from accumulated other comprehensive loss	0
Net current-period other comprehensive gain	3,377
Ending balance	(16,145)
Unrealized Gains (Losses) on Investments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(386)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive gain before reclassifications	(1,357)
Amounts reclassified from accumulated other comprehensive loss	(273)
Net current-period other comprehensive gain	(1,630)
Ending balance	(2,016)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(19,908)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Ending balance	$ (18,161)

XML

Business Segment Information (Schedule of Financial Information About Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 405,598	$ 359,984
Expenses	274,340	251,862
Operating profit (loss)	131,258	108,122
Private Banks [Member]
Segment Reporting Information [Line Items]
Revenues	122,164	112,634
Expenses	112,202	108,550
Operating profit (loss)	9,962	4,084
Investment Advisors [Member]
Segment Reporting Information [Line Items]
Revenues	99,192	88,238
Expenses	52,453	47,539
Operating profit (loss)	46,739	40,699
Institutional Investors [Member]
Segment Reporting Information [Line Items]
Revenues	85,491	77,004
Expenses	41,249	38,828
Operating profit (loss)	44,242	38,176
Investment Managers [Member]
Segment Reporting Information [Line Items]
Revenues	96,855	80,487
Expenses	63,338	52,065
Operating profit (loss)	33,517	28,422
Investments In New Businesses [Member]
Segment Reporting Information [Line Items]
Revenues	1,896	1,621
Expenses	5,098	4,880
Operating profit (loss)	$ (3,202)	$ (3,259)

XML

Business Segment Information (Reconciliation of Total Operating Profit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total operating profit from segments	$ 131,258	$ 108,122
Income from operations	116,316	93,517
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total operating profit from segments	131,258	108,122
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate overhead expenses	$ (14,942)	$ (14,605)

XML

Business Segment Information (Schedule Of Additional Information Pertaining To Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Capital Expenditures	$ 18,498	$ 20,066
Depreciation	7,122	6,800
Amortization	11,854	12,022
Operating Segments [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	18,190	19,914
Depreciation	6,831	6,654
Amortization	11,796	11,972
Operating Segments [Member] | Private Banks [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	10,239	12,850
Depreciation	3,319	4,410
Amortization	6,627	8,464
Operating Segments [Member] | Investment Advisors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	4,260	4,532
Depreciation	1,105	733
Amortization	2,357	2,850
Operating Segments [Member] | Institutional Investors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	967	811
Depreciation	448	227
Amortization	427	323
Operating Segments [Member] | Investment Managers [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	2,520	1,615
Depreciation	1,809	916
Amortization	2,345	216
Operating Segments [Member] | Investments In New Businesses [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	204	106
Depreciation	150	368
Amortization	40	119
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	308	152
Depreciation	291	146
Amortization	$ 58	$ 50

XML

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 14,685	$ 14,480
Unrecognized tax benefits that would affect effective tax rate	13,986	13,737
Interest and penalties on unrecognized benefits	1,218	$ 1,175
Estimated one-time transition tax	11,544
Estimated one-time transition tax, current	915
Estimated one-time transition tax, noncurrent	10,629
Settlement and Lapse of Statute [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits within the next twelve months	$ 2,944

XML

Income Taxes (Interest And Penalties) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 14,685	$ 14,480
Interest and penalties on unrecognized benefits	1,218	1,175
Gross uncertain tax positions	15,903	15,655
Amount included in Current liabilities	2,944	3,275
Amount included in Other long-term liabilities	$ 12,959	$ 12,380

XML

Income Taxes (Effective Income Tax Rate Reconciliation) (Details)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate [Abstract]
Statutory rate	21.00%	35.00%
State taxes, net of federal tax benefit	2.20%	1.50%
Foreign tax expense and tax rate differential	(0.20%)	(0.80%)
Tax benefit from stock option exercises	(10.80%)	(4.20%)
Other, net	(0.30%)	(0.50%)
Effective income tax rate	11.90%	31.00%

XML

Commitments and Contingencies (Details)	Mar. 31, 2018 Lawsuit
Loss Contingencies [Line Items]
Number of lawsuits filed	7
Cases with SPTC as Defendant [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	4
Claims for Violations of Louisiana Racketeering Act [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	2
Cases Remaining in Parish Of East Baton Rouge Granted Indefinite Extensions to Respond [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	2
Cases Filed in East Baton Rouge [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	2

XML

Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jul. 03, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 52,990		$ 52,990
Intangible assets, gross	30,130		30,130
Less: Accumulated amortization	(2,328)		(1,552)
Intangible assets, net	27,802		28,578
Amortization expense	11,854	$ 12,022
Acquired technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	13,510		13,510
Client relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	10,760		10,760
Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	3,470		3,470
Trade name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	2,390		$ 2,390
Archway [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 52,990
Amortization expense	$ 776

XML

Revenues from Contracts with Customers (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 405,598,000
Deferred contract costs	19,875,000	$ 0
Capitalized contract cost impairment	0
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	335,748,000
United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	42,312,000
Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	14,272,000
Ireland [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12,428,000
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	838,000
Investment Management Fees From Investment Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	123,691,000
Investment Management Fees From Investment Management Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	93,955,000
Investment Operations Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	87,837,000
Investment Processing Fees, PaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	45,068,000
Investment Processing Fees, SaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	36,967,000
Professional Services Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	7,306,000
Account Fees And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	10,774,000
Private Banks [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	122,164,000
Private Banks [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	78,133,000
Private Banks [Member] | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	27,525,000
Private Banks [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	11,601,000
Private Banks [Member] | Ireland [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,905,000
Private Banks [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Private Banks [Member] | Investment Management Fees From Investment Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	35,190,000
Private Banks [Member] | Investment Management Fees From Investment Management Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	198,000
Private Banks [Member] | Investment Operations Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	382,000
Private Banks [Member] | Investment Processing Fees, PaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	44,585,000
Private Banks [Member] | Investment Processing Fees, SaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	34,602,000
Private Banks [Member] | Professional Services Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5,419,000
Private Banks [Member] | Account Fees And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,788,000
Investment Advisors [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	99,192,000
Investment Advisors [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	99,192,000
Investment Advisors [Member] | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Ireland [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Investment Management Fees From Investment Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	72,418,000
Investment Advisors [Member] | Investment Management Fees From Investment Management Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	22,764,000
Investment Advisors [Member] | Investment Operations Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Investment Processing Fees, PaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Investment Processing Fees, SaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Professional Services Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Advisors [Member] | Account Fees And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,010,000
Institutional Investors [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	85,491,000
Institutional Investors [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	64,768,000
Institutional Investors [Member] | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	14,787,000
Institutional Investors [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,671,000
Institutional Investors [Member] | Ireland [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,427,000
Institutional Investors [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	838,000
Institutional Investors [Member] | Investment Management Fees From Investment Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	15,858,000
Institutional Investors [Member] | Investment Management Fees From Investment Management Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	69,276,000
Institutional Investors [Member] | Investment Operations Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Institutional Investors [Member] | Investment Processing Fees, PaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Institutional Investors [Member] | Investment Processing Fees, SaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Institutional Investors [Member] | Professional Services Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Institutional Investors [Member] | Account Fees And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	357,000
Investment Managers [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	96,855,000
Investment Managers [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	91,759,000
Investment Managers [Member] | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Managers [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Managers [Member] | Ireland [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5,096,000
Investment Managers [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Managers [Member] | Investment Management Fees From Investment Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investment Managers [Member] | Investment Management Fees From Investment Management Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	83,000
Investment Managers [Member] | Investment Operations Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	87,455,000
Investment Managers [Member] | Investment Processing Fees, PaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	483,000
Investment Managers [Member] | Investment Processing Fees, SaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,365,000
Investment Managers [Member] | Professional Services Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,887,000
Investment Managers [Member] | Account Fees And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,582,000
Investments In New Businesses [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,896,000
Investments In New Businesses [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,896,000
Investments In New Businesses [Member] | United Kingdom [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Ireland [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Investment Management Fees From Investment Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	225,000
Investments In New Businesses [Member] | Investment Management Fees From Investment Management Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,634,000
Investments In New Businesses [Member] | Investment Operations Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Investment Processing Fees, PaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Investment Processing Fees, SaaS [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Professional Services Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0
Investments In New Businesses [Member] | Account Fees And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 37,000