Lines Of Credit	12 Months Ended
Dec. 31, 2012
Line of Credit Facility [Abstract]
Lines Of Credit	Lines of Credit On February 2, 2012 (the Closing Date), the Company entered into a new five-year $300,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, National Association, and a syndicate of other lenders. The Credit Facility became available on the Closing Date and is scheduled to expire in February 2017, 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 1.250 percent above the London Interbank Offer Rate (LIBOR). There is also a commitment fee equal to 0.150 percent per annum on the daily unused portion of the facility. 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. Both the interest rate and commitment fee prices may increase if the Company’s leverage ratio reaches certain levels. 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 Credit Facility may be terminated. The Company had no borrowings through the Credit Facility at December 31, 2012. The Company was in compliance with all covenants of the Credit Facility at December 31, 2012. Prior to entering into the Credit Facility, the Company maintained a $300,000 revolving line of credit through a Credit Agreement, as amended, with JPMorgan Chase Bank, N.A. and a syndicate of other lenders (the 2007 Credit Facility). Outstanding borrowings under the 2007 Credit Facility accrued interest at 0.450 percent above LIBOR. There was also a commitment fee equal to 0.09 percent per annum on the daily unused portion of the facility charged to the Company. The 2007 Credit Facility, as amended, contained covenants that restricted 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. The Company had no borrowings through the 2007 Credit Facility at December 31, 2011. None of the covenants of the 2007 Credit Facility negatively affected the Company’s liquidity or capital resources. The Company made principal payments of $95,000 and $138,000 during 2011 and 2010 to repay the remaining outstanding balance of the 2007 Credit Facility. The Company had no borrowings from the Credit Facility during 2012. The average rates applied to the 2007 Credit Facility during 2011 and 2010 were 0.68 percent and 0.77 percent, respectively. The Company incurred $471, $585 and $1,478 in interest charges and commitment fees relating to all lines of credit during 2012, 2011 and 2010, respectively, which are reflected in Interest expense on the accompanying Consolidated Statements of Operations. The Company’s Canadian subsidiary has a credit facility agreement (the Canadian Credit Facility) for the purpose of facilitating the settlement of mutual fund transactions. The Canadian Credit Facility has no stated expiration date. The amount of the facility is generally limited to $2,000 Canadian dollars or the equivalent amount in U.S. dollars. The Canadian Credit Facility does not contain any covenants which restrict the liquidity or capital resources of the Company. The Company had no borrowings under the Canadian Credit Facility and was in compliance with all covenants during 2012.

Lines of Credit

On February 2, 2012 (the Closing Date), the Company entered into a new five-year $300,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, National Association, and a syndicate of other lenders. The Credit Facility became available on the Closing Date and is scheduled to expire in February 2017, 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 1.250 percent above the London Interbank Offer Rate (LIBOR). There is also a commitment fee equal to 0.150 percent per annum on the daily unused portion of the facility. 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. Both the interest rate and commitment fee prices may increase if the Company’s leverage ratio reaches certain levels. 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 Credit Facility may be terminated. The Company had no borrowings through the Credit Facility at December 31, 2012. The Company was in compliance with all covenants of the Credit Facility at December 31, 2012.

Prior to entering into the Credit Facility, the Company maintained a $300,000 revolving line of credit through a Credit Agreement, as amended, with JPMorgan Chase Bank, N.A. and a syndicate of other lenders (the 2007 Credit Facility). Outstanding borrowings under the 2007 Credit Facility accrued interest at 0.450 percent above LIBOR. There was also a commitment fee equal to 0.09 percent per annum on the daily unused portion of the facility charged to the Company. The 2007 Credit Facility, as amended, contained covenants that restricted 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. The Company had no borrowings through the 2007 Credit Facility at December 31, 2011. None of the covenants of the 2007 Credit Facility negatively affected the Company’s liquidity or capital resources.

The Company made principal payments of $95,000 and $138,000 during 2011 and 2010 to repay the remaining outstanding balance of the 2007 Credit Facility.

The Company had no borrowings from the Credit Facility during 2012. The average rates applied to the 2007 Credit Facility during 2011 and 2010 were 0.68 percent and 0.77 percent, respectively. The Company incurred $471, $585 and $1,478 in interest charges and commitment fees relating to all lines of credit during 2012, 2011 and 2010, respectively, which are reflected in Interest expense on the accompanying Consolidated Statements of Operations.

The Company’s Canadian subsidiary has a credit facility agreement (the Canadian Credit Facility) for the purpose of facilitating the settlement of mutual fund transactions. The Canadian Credit Facility has no stated expiration date. The amount of the facility is generally limited to $2,000 Canadian dollars or the equivalent amount in U.S. dollars. The Canadian Credit Facility does not contain any covenants which restrict the liquidity or capital resources of the Company. The Company had no borrowings under the Canadian Credit Facility and was in compliance with all covenants during 2012.