Summary Of Significant Accounting Policies (Policy)

6 Months Ended

Jun. 30, 2012

Nature of Operations

SEI Investments Company (the Company), a Pennsylvania corporation, provides investment processing, investment management, and investment operations solutions to corporations, financial institutions, financial advisors, and ultra-high-net-worth families in the United States, Canada, the United Kingdom, continental Europe, and other various locations throughout the world. Investment processing solutions consist of application and business process outsourcing services, professional services and transaction-based services. Revenues from investment processing solutions are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations, except for fees earned associated with trade execution services.

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 solutions 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 solutions 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 solutions are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

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 has 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 June 30, 2012, the results of operations for the three and six months ended June 30, 2012 and 2011, and cash flows for the six month periods ended June 30, 2012 and 2011. 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, 2011.

There have been no significant changes in significant accounting policies during the six months ended June 30, 2012 as compared to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

Restricted Cash

Restricted cash includes $5,000 at June 30, 2012 and December 31, 2011 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $1,000 at June 30, 2012 and December 31, 2011 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 for broker-dealers.

Earnings Per Share

Earnings per Share

The calculations of basic and diluted earnings per share for the three months ended June 30, 2012 and 2011 are:



	For the Three Months Ended June 30, 2012
	Income (Numerator)		Shares (Denominator)	Per Share Amount
Basic earnings per common share	$	49,555	174,830	$	0.28
Dilutive effect of stock options	—		1,083
Diluted earnings per common share	$	49,555	175,913	$	0.28



	For the Three Months Ended June 30, 2011
	Income (Numerator)		Shares (Denominator)	Per Share Amount
Basic earnings per common share	$	53,603	184,585	$	0.29
Dilutive effect of stock options	—		2,435
Diluted earnings per common share	$	53,603	187,020	$	0.29

Employee stock options to purchase 16,637,000 and 7,675,000 shares of common stock, with an average exercise price of $22.75 and $28.25, were outstanding during the three months ended June 30, 2012 and 2011, respectively, but not included in the computation of diluted earnings per common share because the effect on diluted earnings per common share would have been anti-dilutive.

The calculations of basic and diluted earnings per share for the six months ended June 30, 2012 and 2011 are:



	For the Six Months Ended June 30, 2012
	Income (Numerator)		Shares (Denominator)	Per Share Amount
Basic earnings per common share	$	99,520	175,589	$	0.57
Dilutive effect of stock options	—		1,202
Diluted earnings per common share	$	99,520	176,791	$	0.56



	For the Six Months Ended June 30, 2011
	Income (Numerator)		Shares (Denominator)	Per Share Amount
Basic earnings per common share	$	111,331	185,186	$	0.60
Dilutive effect of stock options	—		2,571
Diluted earnings per common share	$	111,331	187,757	$	0.59

Employee stock options to purchase 14,017,000 and 7,606,000 shares of common stock, with an average exercise price of $23.40 and $28.26, were outstanding during the six months ended June 30, 2012 and 2011, respectively, but not included in the computation of diluted earnings per common share because the effect on diluted earnings per common share would have been anti-dilutive.

Statements Of Cash Flows

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.

Equity Method Investments, Policy [Policy Text Block]

The Company has an investment in the general partnership LSV Asset Management (LSV). LSV is a registered investment advisor that provides investment advisory services to institutions, including pension plans and investment companies. LSV is currently an investment sub-advisor for a small number of SEI-sponsored mutual funds. 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.

Consolidation, Variable Interest Entity, Policy [Policy Text Block]

The Company does not have a significant equity investment in any of the VIEs and does not have an obligation to enter into any guarantee agreements with the VIEs. The Company is not the primary beneficiary of the VIEs because the expected fees and the expected return on any investment into the VIE by the Company relative to the expected returns of the VIE to the equity investor holders does not approach 50 percent of the expected losses or gains of the VIEs. Therefore, the Company is not required to consolidate any investment products that are VIEs into its financial statements. The Company’s variable interest in the VIEs, which consists of management fees and in some situations, seed capital, is not considered a significant variable interest.

The risks to the Company associated with its involvement with any of the investment products that are VIEs are limited to the cash flows received from the revenue generated for asset management, administration and distribution services and any equity investments in the VIEs. Both of these items are not significant. The Company has no other financial obligation to the VIEs.

Amounts relating to fees received from the VIEs included in Receivables and amounts relating to equity investments in the VIEs included in Investments Available for Sale on the Company’s Consolidated Balance Sheets are not significant to the total assets of the Company.

Fair Value of Financial Instruments, Policy [Policy Text Block]

The fair value of the Company’s financial assets and liabilities 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 equity and fixed-income mutual funds that are quoted daily. Level 2 financial assets consist of 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 for the specific issue owned or pools of similar securities. Level 3 financial assets primarily consist of senior note obligations issued by SIVs. The Company had no Level 3 financial liabilities at June 30, 2012 or December 31, 2011. There were no transfers of financial assets between levels within the fair value hierarchy during the six months ended June 30, 2012.

Marketable Securities, Trading Securities, Policy [Policy Text Block]

The Company records all of its trading securities on the accompanying Consolidated Balance Sheets at fair value. Unrealized gains and losses from the change in fair value of these securities are recognized in Net gain from investments on the accompanying Consolidated Statements of Operations.

Marketable Securities, Policy [Policy Text Block]

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency and commercial paper 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.