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Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading M.D. Sass 1-3 Year Duration U.S. Agency Bond Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The M.D. Sass 1-3 Year Duration U.S. Agency Bond Fund (the “Fund”) seeks to achieve a high and stable rate of total return, when and as opportunities are available in the context of preserving capital in adverse markets.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment) None
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions and/or bid/ask spreads, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in the Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 78.90% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 78.90%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This Example is intended to help you compare the costs of investing in the Fund with the cost of investing in other mutual funds.  The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods.  The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
To achieve its investment objective, the Fund invests at least 95% of its assets in U.S. Government and agency mortgage-backed securities (“MBS”) and other securities issued or guaranteed by the U.S. Government, its agencies or instrumentalities (including Ginnie Mae, Fannie Mae and Freddie Mac, as defined below), and collateralized mortgage obligations (“CMOs”), backed by U.S. Government and agency MBS.  Some of the Fund’s investments may be backed by the full faith and credit of the U.S. Government, while others may be supported only by the discretionary authority of the U.S. Government or only by the credit of the issuing agency or instrumentality.

Under normal market conditions, the target dollar-weighted average effective duration for the Fund is expected to range between 1 and 3 years.  Duration is a measure of a fixed income security’s price sensitivity to changes in interest rates.  Duration takes into account a security’s cash flows over time, including the possibility that a security might be prepaid by the issuer or redeemed by the holder prior to its stated maturity date.  In contrast, maturity measures only the time until final payment is due.  The duration of the Fund’s portfolio is expressed in years and measures the portfolio’s change in value for changes in interest rates.  The Fund may also invest in U.S. Treasury bills.  The securities held by the Fund may be fixed or variable rate obligations.  The Fund may also purchase securities on a when-issued or delayed-delivery basis.

To construct the Fund’s investment portfolio, the Adviser utilizes a process based on rigorous quantitative tests.  These tests include projecting underlying mortgage prepayment rates under a variety of interest rate scenarios and demographic trends, with regard to any given security’s sensitivity to cash flow risk.  The nature of such testing is to measure homeowner refinancing/prepayment behavior, relative to mortgage rate changes, and other factors influencing such behavior.  The Adviser’s process is primarily structured to create value through intensive (i.e. bottom-up) security selection, portfolio construction and relative value trading.  Top-down macro issues and factors are incorporated into the process when considered by the Adviser to be appropriate.  The Adviser may sell a security if its value becomes unattractive, such as when its fundamentals deteriorate, or when other investment opportunities exist that may have more attractive yields.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Before investing in the Fund, you should carefully consider your own investment goals, the amount of time you are willing to leave your money invested, and the amount of risk you are willing to take.  Remember, in addition to possibly not achieving your investment goals, you could lose all or a portion of your investment in the Fund over long or even short periods of time.  The principal risks of investing in the Fund are:

·  
General Market Risk.  Certain securities selected for the Fund’s portfolio may be worth less than the price originally paid for them, or less than they were worth at an earlier time.

·  
Management Risk.  The Adviser’s judgments about the attractiveness, value and potential appreciation of the Fund’s investments may prove to be incorrect and that the investment strategies employed by the Adviser in selecting investments for the Fund may not result in an increase in the value of your investment or in overall performance equal to other similar investment vehicles having similar investment strategies.

·  
Fixed Income Securities Risks.  Interest rates may go up resulting in a decrease in the value of the fixed income securities held by the Fund.  Fixed income securities subject to prepayment can offer less potential for gains during a declining interest rate environment and similar or greater potential for loss in a rising interest rate environment.  Limited trading opportunities for certain fixed income securities may make it more difficult to sell or buy a security at a favorable price or time.

·  
Issuer Risk.  Securities issued by U.S. Government agencies and instrumentalities have different levels of U.S. Government credit support.  Some are backed by the full faith and credit of the U.S. Government, while others are supported by only the discretionary authority of the U.S. Government or only by the credit of the agency or instrumentality.  No assurance can be given that the U.S. Government will provide financial support to U.S. Government-sponsored instrumentalities because they are not obligated to do so by law.  Guarantees of timely prepayment of principal and interest do not assure that the market prices and yields of the securities are guaranteed nor do they guarantee the net asset value or performance of the Fund, which will vary with changes in interest rates, the Adviser’s success and other market conditions.

·  
Mortgage-Backed Securities Risks:

·  
Prepayment Risk of Mortgage-Backed Securities.  In times of declining interest rates, the Fund’s higher yielding securities will be prepaid and the Fund will have to replace them with securities having a lower yield.

·  
Extension Risk of Mortgage-Backed Securities.  In times of rising interest rates, mortgage prepayments will slow causing portfolio securities considered short or intermediate term to be long-term securities which fluctuate more widely in response to changes in interest rates than shorter term securities.

·  
Liquidity Risk.  The risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid securities at an advantageous time or price or purchase securities in an amount sufficient to achieve its desired level of exposure.

·  
When-Issued Securities Risk.  The risk that the price or yield obtained in a when-issued transaction may be less favorable than the price or yield available in the market when the securities delivery takes place, or that failure of a party to a transaction to consummate the trade may result in a loss to the Fund or missing an opportunity to obtain a price considered advantageous.
Risk Lose Money [Text] rr_RiskLoseMoney Remember, in addition to possibly not achieving your investment goals, you could lose all or a portion of your investment in the Fund over long or even short periods of time.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart below demonstrates the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual total returns for one year and since inception compare with those of a broad measure of market performance.  The Fund’s past performance, before and after taxes, is not necessarily an indication of how it will perform in the future.  Updated performance information is available on the Fund’s website at www.mdsassfunds.com or by calling the Fund toll-free at 1-855-MDS-FUND (1-855-637-3863).
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart below demonstrates the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns for one year and since inception compare with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-855-637-3863
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.mdsassfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance, before and after taxes, is not necessarily an indication of how it will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Institutional Class Shares(1) Calendar Year Returns as of December 31
Bar Chart Footnotes [Text Block] rr_BarChartFootnotesTextBlock
(1)  
 The returns shown in the bar chart are for Institutional Class shares.  The performance of the Retail Class shares will differ due to differences in expenses.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
The Fund’s calendar year-to-date return as of June 30, 2013 was -0.55%.  During the period shown in the bar chart, the highest performance for a quarter was 0.69% (for the quarter ended September 30, 2012).  The lowest performance was -0.23% (for the quarter ended December 31, 2012).
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2013
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.55%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest performance
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 0.69%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest performance
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2012
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.23%)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged The Morningstar Short Government Index® replaced the Lipper Short U.S. Government Funds Index® as the secondary benchmark index for the Fund to more accurately represent the Fund's investment approach. The Morningstar Short Government Index is an unmanaged index that tracks the performance of U.S. Treasury and U.S. Government Agency bonds with maturities between one and four years.
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the effect of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns shown are not relevant to those investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts ("IRA").
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns for Retail Class shares will vary.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
After-tax returns depend on an investor’s tax situation and may differ from those shown.  After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the effect of state and local taxes.  The after-tax returns shown are not relevant to those investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts (“IRA”).  The after-tax returns for Retail Class shares will vary.
The BofA Merrill Lynch 1-3 Year US Treasury Index Institutional Class Comparison (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel The BofA Merrill Lynch 1-3 Year US Treasury Index Institutional Class Comparison (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.43%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.74%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jun. 30, 2011
Morningstar Short Government Index Institutional Class Comparison (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Morningstar Short Government Index Institutional Class Comparison (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.99% [1]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.36% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jun. 30, 2011 [1]
The BofA Merrill Lynch 1-3 Year US Treasury Index Retail Class Comparison (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel The BofA Merrill Lynch 1-3 Year US Treasury Index Retail Class Comparison (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.43%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.44%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
Morningstar Short Government Index Retail Class Comparison (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Morningstar Short Government Index Retail Class Comparison (reflects no deduction for fees, expenses or taxes)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.99% [1]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.06% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011 [1]
M.D. Sass 1-3 Year Duration U.S. Agency Bond Fund - Institutional Class Shares
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.29%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.59%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 60
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 189
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 329
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 738
Annual Return 2012 rr_AnnualReturn2012 1.28%
Label rr_AverageAnnualReturnLabel Institutional Class Shares Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 1.28%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.21%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jun. 30, 2011
M.D. Sass 1-3 Year Duration U.S. Agency Bond Fund - Institutional Class Shares | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Institutional Class Shares Return After Taxes on Distributions
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.83%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.78%
M.D. Sass 1-3 Year Duration U.S. Agency Bond Fund - Institutional Class Shares | After Taxes on Distributions and Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Institutional Class Shares Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.83%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.64%
M.D. Sass 1-3 Year Duration U.S. Agency Bond Fund - Retail Class Shares
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.30%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.30%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.85%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 87
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 271
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 471
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,049
Label rr_AverageAnnualReturnLabel Retail Class Shares Return Before Taxes
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 1.02%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.02%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
[1] The Morningstar Short Government Index replaced the Lipper Short U.S. Government Funds Index as the secondary benchmark index for the Fund to more accurately represent the Fund's investment approach. The Morningstar Short Government Index is an unmanaged index that tracks the performance of U.S. Treasury and U.S. Government Agency bonds with maturities between one and four years.